BACKGROUND OF THE INVENTION lnterleukin-4 (IL-4) is a pleiotropic cytokine that has a broad spectrum of biological effects on lymphoid B and T cells, and many non-lymphoid cells including monocytes, endothelial cells and fibroblasts. For example, IL-4 stimulates the proliferation of several IL-2- and IL-3 -dependent cell lines, induces the expression of class II major histocompatability complex molecules on resting B cells, and enhances the secretion of lgG4 and IgE by human B cells. IL-4 is associated with a Th2-type immune response, and is produced by and promotes differentiation of Th2 cells. IL-4 has been implicated in a number of disorders, such as allergy and asthma.

IL-13 is a recently identified (Minty, A. et al., Nature, 1993, 362, 248-250, and McKenzie, A. N. et al., Proc. Natl. Acad. Sci. U.S.A, 1993, 90, 3735-3739) cytokine of 1 12 amino acids secreted by the activated T lymphocytes, the B lymphocytes and the mastocytes after activation. By virtue of its numerous biological properties shared with IL-4, IL-13 has been described as an IL-4-like cytokine. Its activities are indeed similar to those of IL-4 on the B cells (Defrance, T. et al., J. Exp. Med., 1994, 179, 135-143, Punnonen, J. et al., Proc. Natl. Acad. Sci. (USA), 1993, 90, 3730-3734, Fior, R. et al., Eur. Cytokine Network, 1994, 5, 593-600), the monocytes (Muzio, M. R. F. et al., Blood, 1994, 83, 1738-1743, De Waal Malefyt, R. et al., J. Immunol, 1993, 151 , 6370-6381 , Doyle, A. et al., Eur. J. Immunol. 1994, 24, 1441 -1445, Montaner, L. J. et al., J. Exp. Med., 1993, 178, 743-747, Sozzani, P. et al., J. Biol. Chem., 1995, 270, 5084-5088) and other non-haematopoietic cells (Herbert, J. M. et al., Febs Lett., 1993, 328, 268-270, and Derocq, J. M. et al., Febs Lett. 1994, 343, 32-36). On the other hand, contrary to IL-4, it does not exert a specific effect on resting or activated T cells (Zurawuki, G. et al., Immunol. Today, 1994, 15, 19-26).

Various biological activities of IL-13 on the monocytes/macrophages, the B lymphocytes and certain haematopoietic precursors have been described in detail by A. J. Minty as well as in review articles on IL-13. Several data indicate, in addition, that this cytokine has a pleiotropic effect on other cell types. These non- haematopoietic cells which are directly affected by IL-13 are endothelial and microglial cells, keratinocytes and kidney and colon carcinomas.

One of the stages in the analysis of the signal transmitted by a biological molecule within a cell consists in identifying its membrane receptor. The research studies carried out to this end on the IL-13 receptor have shown that IL-13 and IL-4 have a common receptor, or at the very least some of the components of a common receptor complex, as well as common signal transduction elements (Zurawski S. M. et al., Embo Journal, 1993, 12, 2663-2670, Aversa, G. et al., J. Exp. Med., 1993, 178, 2213-2218, Vita, N. et al., Biol. Chem., 1995, 270, 3512-3517, Lefort, S. et al., Febs Lett., 1995, 366, 122-126). This receptor is present at the surface of various cell types, in a variable number according to the cell type considered. The comparative distribution of the IL-13 and IL-4 receptors has been indicated by A. J. Minty (lnterleukin-13 for Cytokines in Health and Disease. Eds D. G. Remick and J. S. Frie, Marcel Decker, N.Y. 1996).

The cell surface receptors and receptor complexes bind IL-4 and/or IL- 13 with different affinities. The principle components of receptors and receptor complexes that bind IL-4 and/or IL-13 are IL-4Ra, IL-13Ral and IL-13Ra2. These chains are expressed on the surface of cells as monomers or heterodimers of IL- 4Ra/IL-13Ral (Type II IL-4R) or IL-4Ra/ c (Type I IL-4R). IL-4Ra monomer and IL-4R / c heterodimer bind IL-4, but not IL-13. IL-13Ra1 and IL-13Ra2 monomers bind IL-13, but do not bind IL-4. IL-4Ra/IL-13Ra1 heterodimer binds both IL-4 and IL-13 (Murata et al., Int. J. Hematol., 1999, 69, 13-20).

Th2-type immune responses promote antibody production and humoral immunity, and are elaborated to fight off extracellular pathogens. Th2 cells are mediators of Ig production (humoral immunity) and produce IL-4, IL-5, IL-6, IL- 9, IL- 10 and IL-13 (Tanaka, et, al., Cytokine Regulation of Humoral Immunity, 251 - 272, Snapper, ed., John Wiley and Sons, New York (1996)). Th2-type immune responses are characterized by the generation of certain cytokines (e.g., IL-4, IL-13) and specific types of antibodies (IgE, lgG4) and are typical of allergic reactions, which may result in watery eyes and asthmatic symptoms, such as airway inflammation and contraction of airway muscle cells in the lungs.

Both IL-4 and IL-13 are therapeutically important cytokines based on their biological functions and play critical roles in many diseases, including asthma (Curr Opin Allergy Clin Immunol 2005, Vo. 5, 161 -166). IL-4 has been shown to be able to inhibit autoimmune disease and IL-4 and IL-13 have both shown the potential to enhance anti-tumor immune responses. Elevations in IL-4 and IL-13 and their receptors have been linked to the pathogenesis of idiopathic pulmonary fibrosis (IPF) (Jakubzick C. et al., Am J Pathol. 2004:164(6):1989-2001 ; Murray LA et al. Int J Biochem Cell Biol. 2008:40(10):2174-82. Evidence in the literature demonstrate that the TH2 cytokines IL-4 and IL-13 play multiple roles in the pathogenesis of IPF as mediators of this lung tissue remodeling and fibrosis. Although the Th2-type CD4+ t cells in the lung are likely the predominant sources of IL-4 and IL-13, and are implicated as important regulators of extracellular matrix remodeling (Wynn, TA, Naat. Rev. Immunol, 4:583-594, 2004), other cell types including mast cells, basophils, eosinophils, macrophages and epithelial cells may also be potential sources of these cytokines (Gordon S and Martinez FO, Immunity Rev. 32:593-604, 2010). In IPF patients, IL-13 and IL-4 levels in bronchial alveolar lavage fluid are elevated compared to normal controls. Such evidence suggests that therapies capable of suppressing or neutralizing these cytokines have the potential for delaying the progression of fibrosis in IPF patients. Since both cytokines are involved in the pathogenesis of allergic diseases or fibrotic diseases, inhibitors of these cytokines could provide therapeutic benefits.

Accordingly, a need exists for improved agents that inhibit IL-4, inhibit IL-13, and single agents that inhibit both IL-4 and IL-13 that are non-immunogenic and safe for use in humans. We previously reported on a dual V region antibody like binding peptide having four binding sites that specifically bind to IL-4 and IL-13 (WO2009/052081 (PCT/US2008/079787), which is incorporated by reference in its entirety.

SUMMARY OF THE INVENTION

An embodiment of the invention is a maximal safe therapeutic dose of a dual V region antibody-like protein or a fragment of a dual V region antibody-like region that specifically binds to IL-4 and IL-13 to a human subject having an area under the plasma concentration versus time curve calculated using the trapezoidal method from time zero to real time (AUCi _as t) from about 433 ug-h/ml to about 14200 ug-h/ml. In a further embodiment of the invention, the dual V region antibody-like protein or the fragment of a dual V region antibody-like region comprises a variable light chain comprising amino acid sequences SEQ ID NO:1 and SEQ ID NO: 3 and a variable heavy chain comprising amino acid sequences SEQ ID NO:2 and SEQ ID NO: 4. In a further embodiment, SEQ ID NO:1 and SEQ ID NO:3 are linked together with a peptide linker and SEQ ID NO:2 and SEQ ID NO:4 are linked together with the peptide linker. In a further embodiment, the peptide linker consists of SEQ ID NO: 6. In another embodiment, the safe therapeutic dose is equal to or less than about 300mg. In a further embodiment, the safe therapeutic dose is selected from the group consisting of 10mg, 20mg, 40mg, 80mg, 150mg and 300mg.

An embodiment of the invention is a maximal safe therapeutic dose of a dual V region antibody-like protein or a fragment of a dual V region antibody-like region that specifically binds to IL-4 and IL-13 to a human subject having an area under the plasma concentration versus time curve extrapolated to infinity (AUC) from about 459 ug-h/ml to about 670014500 ug-h/ml. In a further embodiment of the invention, the dual V region antibody-like protein or the fragment of a dual V region antibody-like region comprises a variable light chain comprising amino acid sequences SEQ ID NO:1 and SEQ ID NO: 3 and a variable heavy chain comprising amino acid sequences SEQ ID NO:2 and SEQ ID NO: 4. In a further embodiment, SEQ ID NO:1 and SEQ ID NO:3 are linked together with a peptide linker and SEQ ID NO:2 and SEQ ID NO:4 are linked together with the peptide linker. In a further embodiment, the peptide linker consists of SEQ ID NO: 6. In another embodiment, the safe therapeutic dose is equal to or less than about 300mg. In a further embodiment, the safe therapeutic dose is selected from the group consisting of 10mg, 20mg, 40mg, 80mg, 150mg and 300mg.

An embodiment of the invention is a maximal safe therapeutic dose of a dual V region antibody-like protein or a fragment of a dual V region antibody-like region that specifically binds to IL-4 and IL-13 to a human subject having a maximum plasma concentration observed (C _ma x) from about 0.717 ug/ml to about 28.7 ug/ml. In a further embodiment of the invention, the dual V region antibody-like protein or the fragment of a dual V region antibody-like region comprises a variable light chain comprising amino acid sequences SEQ ID NO:1 and SEQ ID NO: 3 and a variable heavy chain comprising amino acid sequences SEQ ID NO:2 and SEQ ID NO: 4. In a further embodiment, SEQ ID NO:1 and SEQ ID NO:3 are linked together with a peptide linker and SEQ ID NO:2 and SEQ ID NO:4 are linked together with the peptide linker. In a further embodiment, the peptide linker consists of SEQ ID NO: 6. In another embodiment, the safe therapeutic dose is equal to or less than about 300mg. In a further embodiment, the safe therapeutic dose is selected from the group consisting of 10mg, 20mg, 40mg, 80mg, 150mg and 300mg.

An embodiment of the invention is a maximal safe therapeutic dose of a dual V region antibody-like protein or a fragment of a dual V region antibody-like region that specifically binds to IL-4 and IL-13 to a human subject having a first time to reach a maximum plasma concentration (t _max ) from about 96 hr to about 168 hr. In a further embodiment of the invention, the dual V region antibody-like protein or the fragment of a dual V region antibody-like region comprises a variable light chain comprising amino acid sequences SEQ ID NO:1 and SEQ ID NO: 3 and a variable heavy chain comprising amino acid sequences SEQ ID NO:2 and SEQ ID NO: 4. In a further embodiment, SEQ ID NO:1 and SEQ ID NO:3 are linked together with a peptide linker and SEQ ID NO:2 and SEQ ID NO:4 are linked together with the peptide linker. In a further embodiment, the peptide linker consists of SEQ ID NO: 6. In another embodiment, the safe therapeutic dose is equal to or less than about 300mg. In a further embodiment, the safe therapeutic dose is selected from the group consisting of 10mg, 20mg, 40mg, 80mg, 150mg and 300mg.

An embodiment of the invention is a maximal safe therapeutic dose of a dual V region antibody-like protein or a fragment of a dual V region antibody-like region that specifically binds to IL-4 and IL-13 to a human subject having from about 1679 hr to about 2020 hr. In a further embodiment of the invention, the dual V region antibody-like protein or the fragment of a dual V region antibody-like region comprises a variable light chain comprising amino acid sequences SEQ ID NO:1 and SEQ ID NO: 3 and a variable heavy chain comprising amino acid sequences SEQ ID NO:2 and SEQ ID NO: 4. In a further embodiment, SEQ ID NO:1 and SEQ ID NO:3 are linked together with a peptide linker and SEQ ID NO:2 and SEQ ID NO:4 are linked together with the peptide linker. In a further embodiment, the peptide linker consists of SEQ ID NO: 6. In another embodiment, the safe therapeutic dose is equal to or less than about 300mg. In a further embodiment, the safe therapeutic dose is selected from the group consisting of 10mg, 20mg, 40mg, 80mg, 150mg and 300mg.

An embodiment of the invention is a maximal safe therapeutic dose of a dual V region antibody-like protein or a fragment of a dual V region antibody-like region that specifically binds to IL-4 and IL-13 to a human subject having _/2 z from about 244 hr to about 536 hr. In a further embodiment of the invention, the dual V region antibody- like protein or the fragment of a dual V region antibody-like region comprises a variable light chain comprising amino acid sequences SEQ ID NO:1 and SEQ ID NO: 3 and a variable heavy chain comprising amino acid sequences SEQ ID NO:2 and SEQ ID NO: 4. In a further embodiment, SEQ ID NO:1 and SEQ ID NO:3 are linked together with a peptide linker and SEQ ID NO:2 and SEQ ID NO:4 are linked together with the peptide linker. In a further embodiment, the peptide linker consists of SEQ ID NO: 6. In another embodiment, the safe therapeutic dose is equal to or less than about 300mg. In a further embodiment, the safe therapeutic dose is selected from the group consisting of 10mg, 20mg, 40mg, 80mg, 150mg and 300mg.

An embodiment of the invention is a maximal safe therapeutic dose of a dual V region antibody-like protein or a fragment of a dual V region antibody-like region that specifically binds to IL-4 and IL-13 to a human subject having Vss/F from about 6830 ml to about 18770 ml. In a further embodiment of the invention, the dual V region antibody-like protein or the fragment of a dual V region antibody-like region comprises a variable light chain comprising amino acid sequences SEQ ID NO:1 and SEQ ID NO: 3 and a variable heavy chain comprising amino acid sequences SEQ ID NO:2 and SEQ ID NO: 4. In a further embodiment, SEQ ID NO:1 and SEQ ID NO:3 are linked together with a peptide linker and SEQ ID NO:2 and SEQ ID NO:4 are linked together with the peptide linker. In a further embodiment, the peptide linker consists of SEQ ID NO: 6. In another embodiment, the safe therapeutic dose is equal to or less than about 300mg. In a further embodiment, the safe therapeutic dose is selected from the group consisting of 10mg, 20mg, 40mg, 80mg, 150mg and 300mg.

An embodiment of the invention is a maximal safe therapeutic dose of a dual V region antibody-like protein or a fragment of a dual V region antibody-like region that specifically binds to IL-4 and IL-13 to a human subject having CL/F from about 12.1 ml/hr to about 38.4 ml/hr. In a further embodiment of the invention, the dual V region antibody-like protein or the fragment of a dual V region antibody-like region comprises a variable light chain comprising amino acid sequences SEQ ID NO:1 and SEQ ID NO: 3 and a variable heavy chain comprising amino acid sequences SEQ ID NO:2 and SEQ ID NO: 4. In a further embodiment, SEQ ID NO:1 and SEQ ID NO:3 are linked together with a peptide linker and SEQ ID NO:2 and SEQ ID NO:4 are linked together with the peptide linker. In a further embodiment, the peptide linker consists of SEQ ID NO: 6. In another embodiment, the safe therapeutic dose is equal to or less than about 300mg. In a further embodiment, the safe therapeutic dose is selected from the group consisting of 10mg, 20mg, 40mg, 80mg, 150mg and 300mg.

An embodiment of the invention is a method of identifying or monitoring the occurrence of a safe therapeutic dose of a dual V region antibody-like protein or a fragment of a dual V region antibody-like region that specifically binds to IL-4 and IL- 13 having been administered to a human subject, said method comprising (a) administering a dose of said dual V region antibody-like protein or a fragment of a dual V region antibody-like region to said human subject; (b) measuring one or more events selected from the group consisting of intensive treatment in an emergency room or at home for allergic bronchospasm, blood dyscrasias, convulsions, alanine aminotransferase (ALT) >3 x upper limit of normal range (ULN) associated with total bilirubin >2 x ULN, asymptomatic ALT increase >10 x ULN, development of drug dependency or drug abuse, ALT increase >2 x ULN, hsCRP >10 mg/L for >72 hours, cardiac troponin I (cTnl) >2 x ULN, a ventricular depolarization and repolarization time (QT) on an electrocardiogram (ECG) machine wherein the QT is automatically corrected by the ECG machine (QTc) that is QTc >500 ms and severe skin reactions local to the site of IP injection; and (c) determining one or more said events as measured in (b) has not occurred wherein said dose is identified as said safe therapeutic dose having been administered to said human subject. In a further embodiment of the invention, the dual V region antibody-like protein or the fragment of a dual V region antibody-like region comprises a variable light chain comprising amino acid sequences SEQ ID NO:1 and SEQ ID NO: 3 and a variable heavy chain comprising amino acid sequences SEQ ID NO:2 and SEQ ID NO: 4. In a further embodiment, SEQ ID NO:1 and SEQ ID NO:3 are linked together with a peptide linker and SEQ ID NO:2 and SEQ ID NO:4 are linked together with the peptide linker. In a further embodiment, the peptide linker consists of SEQ ID NO: 6. In another embodiment, the safe therapeutic dose is equal to or less than about 300mg. In a further embodiment, the safe therapeutic dose is selected from the group consisting of 10mg, 20mg, 40mg, 80mg, 150mg and 300mg.

An embodiment of the invention is a method monitoring whether a therapeutic dose of a dual V region antibody-like protein or a fragment of a dual V region antibody-like region that specifically binds to IL-4 and IL-13 administered to a human subject is safe, said method comprising (a) administering said therapeutic dose of said dual V region antibody-like protein or a fragment of a dual V region antibody-like region to said human subject; (b) measuring one or more events selected from the group consisting of intensive treatment in an emergency room or at home for allergic bronchospasm, blood dyscrasias, convulsions, alanine aminotransferase (ALT) >3 x upper limit of normal range (ULN) associated with total bilirubin >2 x ULN, asymptomatic ALT increase >10 x ULN, development of drug dependency or drug abuse, ALT increase >2 x ULN, hsCRP >10 mg/L for >72 hours, cardiac troponin I (cTnl) >2 x ULN, a ventricular depolarization and repolariztion time (QT) on an electrocardiogram (ECG) machine wherein the QT is automatically corrected by the ECG machine (QTc) that is QTc >500 ms and severe skin reactions local to the site of IP injection; and(c) determining one or more said events as measured in (b) has occurred wherein said therapeutic dose is identified as not safe and the therapeutic dose is discontinued or lowered. In a further embodiment of the invention, the dual V region antibody-like protein or the fragment of a dual V region antibody-like region comprises a variable light chain comprising amino acid sequences SEQ ID NO:1 and SEQ ID NO: 3 and a variable heavy chain comprising amino acid sequences SEQ ID NO:2 and SEQ ID NO: 4. In a further embodiment, SEQ ID NO:1 and SEQ ID NO:3 are linked together with a peptide linker and SEQ ID NO:2 and SEQ ID NO:4 are linked together with the peptide linker. In a further embodiment, the peptide linker consists of SEQ ID NO: 6. In another embodiment, the therapeutic dose is equal to or less than about 300mg. In a further embodiment, the therapeutic dose is selected from the group consisting of 10mg, 20mg, 40mg, 80mg, 150mg and 300mg. An embodiment of the invention is a method of selecting a safe therapeutic dose or of monitoring the safe use of a therapeutic dose of dual V region antibody- like protein or a fragment of a dual V region antibody-like region that specifically binds to IL-4 and IL-13 to a human subject, said method comprising (a) administering a dose of said dual V region antibody-like protein or a fragment of a dual V region antibody-like region to said human subject; (b) measuring a level of C-reactive protein (CRP) in a blood sample from said human subject; and (c) determining said level of C-reactive protein (CRP) is less than 20 mg/L as measured in (b) wherein said dose is selected as said safe therapeutic dose to be administered to said human subject. In a further embodiment of the invention, the dual V region antibody-like protein or the fragment of a dual V region antibody-like region comprises a variable light chain comprising amino acid sequences SEQ ID NO:1 and SEQ ID NO: 3 and a variable heavy chain comprising amino acid sequences SEQ ID NO:2 and SEQ ID NO: 4. In a further embodiment, SEQ ID NO:1 and SEQ ID NO:3 are linked together with a peptide linker and SEQ ID NO:2 and SEQ ID NO:4 are linked together with the peptide linker. In a further embodiment, the peptide linker consists of SEQ ID NO: 6. In another embodiment, the safe therapeutic dose is equal to or less than about 300mg. In a further embodiment, the safe therapeutic dose is selected from the group consisting of 10mg, 20mg, 40mg, 80mg, 150mg and 300mg.

An embodiment of the invention is a method of selecting a safe therapeutic dose or of monitoring the safe use of a therapeutic dose of a dual V region antibody- like protein or a fragment of a dual V region antibody-like region that specifically binds to IL-4 and IL-13 to a human subject, said method comprising (a) administering a dose of said dual V region antibody-like protein or a fragment of a dual V region antibody-like region to said human subject; (b) measuring a ventricular depolarization and repolariztion time (QT) on an electrocardiogram (ECG) machine wherein the QT is automatically corrected by the ECG machine (QTc) of said human subject; and (c) determining said QTC is less than 500ms as measured in (b) wherein said dose is selected as said safe therapeutic dose to be administered to said human subject. In a further embodiment of the invention, the dual V region antibody-like protein or the fragment of a dual V region antibody-like region comprises a variable light chain comprising amino acid sequences SEQ ID NO:1 and SEQ ID NO: 3 and a variable heavy chain comprising amino acid sequences SEQ ID NO:2 and SEQ ID NO: 4. In a further embodiment, SEQ ID NO:1 and SEQ ID NO:3 are linked together with a peptide linker and SEQ ID NO:2 and SEQ ID NO:4 are linked together with the peptide linker. In a further embodiment, the peptide linker consists of SEQ ID NO: 6. In another embodiment, the safe therapeutic dose is equal to or less than about 300mg. In a further embodiment, the safe therapeutic dose is selected from the group consisting of 10mg, 20mg, 40mg, 80mg, 150mg and 300mg.

An embodiment of the invention is a method of determining whether a therapeutic dose of a dual V region antibody-like protein or a fragment of a dual V region antibody-like region is safe and tolerable for administration to humans, the method comprising (a) perform a non-immunogenicity study in a non-human primate; and (b) determine a safe therapeutic dose in a human patient based on the non- immunogenicity study in the non-human primate. In a further embodiment of the invention, the dual V region antibody-like protein or the fragment of a dual V region antibody-like region comprises a variable light chain comprising amino acid

sequences SEQ ID NO:1 and SEQ ID NO: 3 and a variable heavy chain comprising amino acid sequences SEQ ID NO:2 and SEQ ID NO: 4. In a further embodiment, SEQ ID NO:1 and SEQ ID NO:3 are linked together with a peptide linker and SEQ ID NO:2 and SEQ ID NO:4 are linked together with the peptide linker. In a further embodiment, the peptide linker consists of SEQ ID NO: 6. In another embodiment, the therapeutic dose is equal to or less than about 300mg. In a further embodiment, the therapeutic dose is selected from the group consisting of 10mg, 20mg, 40mg, 80mg, 150mg and 300mg.

An embodiment of the invention is a method of measuring total amount of human antibody in a test sample, the method comprising (a) providing a monoclonal anti-human kappa chain; (b) adding a test sample to the monoclonal anti-human kappa chain; (c) adding sulfo-tag labeled anti-human antibody to the monoclonal anti-human kappa chain and the sample; and (d) quantifying the amount of the tag- labeled anti-human antibody that is bound to the sample wherein the amount of the tag- labeled anti-human antibody bound to the test sample determines the total amount of human antibody in the test sample. In further embodiment of the invention, the anti-human kappa chain is attached to a capture device. An embodiment of the invention is a method of measuring a proportion of bispecific antibody capable of binding IL-4 and IL13 present in a test sample, the method comprising (a) providing a anti-human IL-4 antibody; (b) adding human IL-4 to the anti-human IL-4 antibody; (c) adding a test sample comprising a bispecific antibody capable of binding IL-4 and IL-13 to the human IL-4 and the anti-human IL-4 antibody; (d) adding human IL-13 to the test sample comprising a bispecific antibody capable of binding IL-4 and IL-13 and the human IL-4 and the anti-human IL-4 antibody; (e) adding biotinylated anti-human IL-13 antibody to the test sample comprising a bispecific antibody capable of binding IL-4 and IL-13 and the human IL- 4 and the anti-human IL-4 antibody; and (f) adding tag-labeled streptavidin to the biotinylated anti-human IL-13 antibody and the test sample comprising a bispecific antibody capable of binding IL-4 and IL-13 and the human IL-4 and the anti-human IL-4 antibody; and (g) quantifying the amount of the tag- labeled streptavidin that is bound to the the biotinylated anti-human IL-13 antibody wherein the amount of the tag-labeled streptavidin bound determines the proportion of bispecific antibody capable of binding IL-4 and IL13 present in the test sample. In a further embodiment of the invention, the anti-human IL-4 antibody is attached to a capture device. In a further embodiment of the invention, the bispecific antibody comprises a variable light chain comprising amino acid sequences SEQ ID NO:1 and SEQ ID NO: 3 and a variable heavy chain comprising amino acid sequences SEQ ID NO:2 and SEQ ID NO: 4. In a further embodiment, SEQ ID NO:1 and SEQ ID NO:3 are linked together with a peptide linker and SEQ ID NO:2 and SEQ ID NO:4 are linked together with the peptide linker. In a further embodiment, the peptide linker consists of SEQ ID NO: 6.

An embodiment of the invention is a method of measuring a proportion of bispecific antibody capable of binding IL-4 and IL13 present in a test sample, the method comprising: (a) providing a anti-human IL-13 antibody; (b) adding human IL- 13 to the anti-human IL-13 antibody; (c) adding a test sample comprising a bispecific antibody capable of binding IL-4 and IL-13 to the human IL-13 and the anti-human IL- 13 antibody; (d) adding human IL-4 to the test sample comprising a bispecific antibody capable of binding IL-4 and IL-13 and the human IL-13 and the anti-human IL-13 antibody; (e) adding biotinylated anti-human IL-4 antibody to the test sample comprising a bispecific antibody capable of binding IL-4 and IL-13 and the human IL- 13 and the anti-human IL-13 antibody; and (f) adding tag-labeled streptavidin to the biotinylated anti-human IL-4 antibody and the test sample comprising a bispecific antibody capable of binding IL-4 and IL-13 and the human IL-13 and the anti-human IL-13 antibody; and (g) quantifying the amount of the tag- labeled streptavidin that is bound to biotinylated anti-human IL-4 antibody wherein the amount of the tag- labeled streptavidin bound determines the proportion of bispecific antibody capable of binding IL-4 and IL13 present in the test sample. In a further embodiment of the invention, the anti-human IL-13 antibody is attached to a capture device. In a further embodiment of the invention, the bispecific antibody comprises a variable light chain comprising amino acid sequences SEQ ID NO:1 and SEQ ID NO: 3 and a variable heavy chain comprising amino acid sequences SEQ ID NO:2 and SEQ ID NO: 4. In a further embodiment, SEQ ID NO:1 and SEQ ID NO:3 are linked together with a peptide linker and SEQ ID NO:2 and SEQ ID NO:4 are linked together with the peptide linker. In a further embodiment, the peptide linker consists of SEQ ID NO: 6.

An embodiment of the invention is a method of measuring anti-drug antibodies in a test sample, the method comprising (a) combining a test sample with a

biotinylated bispecific antibody capable of binding IL-4 and IL-13 and a tag-labeled bispecific antibody capable of binding IL-4 and IL-13; (b) adding streptavidin to the test sample and the biotinylated bispecific antibody capable of binding IL-4 and IL-13 and the tag-labeled bispecific antibody capable of binding IL-4 and IL-13; and (c) quantifying the amount of the tag-labeled bispecific antibody capable of binding IL-4 and IL-13 is bound wherein the amount of the tag- labeled bispecific antibody capable of binding IL-4 and IL-13 bound determines the amount of anti-drug antibodies human antibody in the test sample. In a further embodiment of the invention, the streptavidin is attached to a capture device.

An embodiment of the invention is a method of quantifying or monitoring an amount of anti-drug antibodies in blood serum of a human subject or a non-human primate following administration of drug wherein the drug is a dual V region antibodylike protein or a fragment of a dual V region antibody-like region that specifically binds to IL-4 and IL-13, said method comprising: (a) administering a dose of said dual V region antibody-like protein or a fragment of a dual V region antibody-like region to said human subject or said non-human primate; (b) obtaining a sample of said blood serum from said human subject or said non-human primate; and(b) determining the amount of anti-drug antibodies in said serum sample. In a further embodiment of the invention, the dual V region antibody-like protein or the fragment of a dual V region antibody-like region comprises a variable light chain comprising amino acid

sequences SEQ ID NO:1 and SEQ ID NO: 3 and a variable heavy chain comprising amino acid sequences SEQ ID NO:2 and SEQ ID NO: 4. In a further embodiment, SEQ ID NO:1 and SEQ ID NO:3 are linked together with a peptide linker and SEQ ID NO:2 and SEQ ID NO:4 are linked together with the peptide linker. In a further embodiment, the peptide linker consists of SEQ ID NO: 6.

An embodiment of the invention is a method of quantifying or monitoring a total amount of a dual V region antibody-like protein or a fragment of a dual V region antibody-like region that specifically binds to IL-4 and IL-13 in blood serum of a human subject or a non-human primate, said method comprising (a) administering a dose of said dual V region antibody-like protein or a fragment of a dual V region antibody-like region to said human subject or said non-human primate; (b) obtaining a sample of said blood serum from said human subject or said non-human primate; and (c) determining said total amount of said dual V region antibody-like protein or a fragment of a dual V region antibody-like region in said sample. In a further embodiment of the invention, the dual V region antibody-like protein or the fragment of a dual V region antibody-like region comprises a variable light chain comprising amino acid sequences SEQ ID NO:1 and SEQ ID NO: 3 and a variable heavy chain comprising amino acid sequences SEQ ID NO:2 and SEQ ID NO: 4. In a further embodiment, SEQ ID NO:1 and SEQ ID NO:3 are linked together with a peptide linker and SEQ ID NO:2 and SEQ ID NO:4 are linked together with the peptide linker. In a further embodiment, the peptide linker consists of SEQ ID NO: 6.

An embodiment of the invention is a method of quantifying or monitoring a proportion of a dual V region antibody-like protein or a fragment of a dual V region antibody-like region that specifically binds to IL-4 and IL-13 that is functionally available to bind IL-4 and IL-13 in blood serum of a human subject or a non-human primate, said method comprising (a) administering a dose of said dual V region antibody-like protein or a fragment of a dual V region antibody-like region to said human subject or said non-human primate; (b) obtaining a sample of said blood serum from said human subject or said non-human primate; and(c) determining said proportion of said dual V region antibody-like protein or a fragment of a dual V region antibody-like region that is functionally available to bind IL-4 and IL-13 in said sample. In a further embodiment of the invention, the dual V region antibody-like protein or the fragment of a dual V region antibody-like region comprises a variable light chain comprising amino acid sequences SEQ ID NO:1 and SEQ ID NO: 3 and a variable heavy chain comprising amino acid sequences SEQ ID NO:2 and SEQ ID NO: 4. In a further embodiment, SEQ ID NO:1 and SEQ ID NO:3 are linked together with a peptide linker and SEQ ID NO:2 and SEQ ID NO:4 are linked together with the peptide linker. In a further embodiment, the peptide linker consists of SEQ ID NO: 6.

An embodiment of the invention is a method of treating asthma in a mammal comprising the step of administering to said mammal a therapeutically effective amount of a dual V region antibody-like protein or a fragment of a dual V region antibody-like region that specifically binds to IL-4 and IL-13. In a further embodiment of the invention, the dual V region antibody-like protein or the fragment of a dual V region antibody-like region comprises a variable light chain comprising amino acid sequences SEQ ID NO:1 and SEQ ID NO: 3 and a variable heavy chain comprising amino acid sequences SEQ ID NO:2 and SEQ ID NO: 4. In a further embodiment, SEQ ID NO:1 and SEQ ID NO:3 are linked together with a peptide linker and SEQ ID NO:2 and SEQ ID NO:4 are linked together with the peptide linker. In a further embodiment, the peptide linker consists of SEQ ID NO: 6. In another embodiment, the therapeutically effective amount is equal to or less than about 300mg. In a further embodiment, the therapeutically effective amount is selected from the group consisting of 10mg, 20mg, 40mg, 80mg, 150mg and 300mg.

An embodiment of the invention is a method of treating idiopathic pulmonary fibrosis in a mammal comprising the step of administering to said mammal a therapeutically effective amount of a dual V region antibody-like protein or a fragment of a dual V region antibody-like region that specifically binds to IL-4 and IL-13. In a further embodiment of the invention, the dual V region antibody-like protein or the fragment of a dual V region antibody-like region comprises a variable light chain comprising amino acid sequences SEQ ID NO:1 and SEQ ID NO: 3 and a variable heavy chain comprising amino acid sequences SEQ ID NO:2 and SEQ ID NO: 4. In a further embodiment, SEQ ID NO:1 and SEQ ID NO:3 are linked together with a peptide linker and SEQ ID NO:2 and SEQ ID NO:4 are linked together with the peptide linker. In a further embodiment, the peptide linker consists of SEQ ID NO: 6. In another embodiment, the therapeutically effective amount is equal to or less than about 300mg. In a further embodiment, the therapeutically effective amount is selected from the group consisting of 10mg, 20mg, 40mg, 80mg, 150mg and 300mg.

An embodiment of the invention is a method of treating a disease mediated by IL-4 or IL-13 or IL-4 and IL-13-induced STAT6 phosphorylation in a mammal which comprises administering a therapeutically effective amount of a dual V region antibody-like protein or a fragment of a dual V region antibody-like region that specifically binds to IL-4 and IL-13. In a further embodiment of the invention, the dual V region antibody-like protein or the fragment of a dual V region antibody-like region comprises a variable light chain comprising amino acid sequences SEQ ID NO:1 and SEQ ID NO: 3 and a variable heavy chain comprising amino acid sequences SEQ ID NO:2 and SEQ ID NO: 4. In a further embodiment, SEQ ID NO:1 and SEQ ID NO:3 are linked together with a peptide linker and SEQ ID NO:2 and SEQ ID NO:4 are linked together with the peptide linker. In a further embodiment, the peptide linker consists of SEQ ID NO: 6. In another embodiment, the therapeutically effective amount is equal to or less than about 300mg. In a further embodiment, the

therapeutically effective amount is selected from the group consisting of 10mg, 20mg, 40mg, 80mg, 150mg and 300mg.

An embodiment of the invention is a method of treating a disease mediated by IL-4 or IL-13 or IL-4 and IL-13-induced IL-6 release in a mammal which comprises administering a therapeutically effective amount of a dual V region antibody-like protein or a fragment of a dual V region antibody-like region that specifically binds to IL-4 and IL-13. In a further embodiment of the invention, the dual V region antibodylike protein or the fragment of a dual V region antibody-like region comprises a variable light chain comprising amino acid sequences SEQ ID NO:1 and SEQ ID NO: 3 and a variable heavy chain comprising amino acid sequences SEQ ID NO:2 and SEQ ID NO: 4. In a further embodiment, SEQ ID NO:1 and SEQ ID NO:3 are linked together with a peptide linker and SEQ ID NO:2 and SEQ ID NO:4 are linked together with the peptide linker. In a further embodiment, the peptide linker consists of SEQ ID NO: 6. In another embodiment, the therapeutically effective amount is equal to or less than about 300mg. In a further embodiment, the therapeutically effective amount is selected from the group consisting of 10mg, 20mg, 40mg, 80mg, 150mg and 300mg.

An embodiment of the invention is a method of treating a disease mediated by IL-4 or IL-13 or IL-4 and IL-13-induced eotaxin release in a mammal which comprises administering a therapeutically effective amount of a dual V region antibody-like protein or a fragment of a dual V region antibody-like region that specifically binds to IL-4 and IL-13. In a further embodiment of the invention, the dual V region antibodylike protein or the fragment of a dual V region antibody-like region comprises a variable light chain comprising amino acid sequences SEQ ID NO:1 and SEQ ID NO: 3 and a variable heavy chain comprising amino acid sequences SEQ ID NO:2 and SEQ ID NO: 4. In a further embodiment, SEQ ID NO:1 and SEQ ID NO:3 are linked together with a peptide linker and SEQ ID NO:2 and SEQ ID NO:4 are linked together with the peptide linker. In a further embodiment, the peptide linker consists of SEQ ID NO: 6. In another embodiment, the therapeutically effective amount is equal to or less than about 300mg. In a further embodiment, the therapeutically effective amount is selected from the group consisting of 10mg, 20mg, 40mg, 80mg, 150mg and 300mg.

An embodiment of the invention is a method of treating a disease mediated by IL-4 or IL-13 or IL-4 and IL-13-induced LOX expression in a mammal which

comprises administering a therapeutically effective amount of a dual V region antibody-like protein or a fragment of a dual V region antibody-like region that specifically binds to IL-4 and IL-13. In a further embodiment of the invention, the dual V region antibody-like protein or the fragment of a dual V region antibody-like region comprises a variable light chain comprising amino acid sequences SEQ ID NO:1 and SEQ ID NO: 3 and a variable heavy chain comprising amino acid sequences SEQ ID NO:2 and SEQ ID NO: 4. In a further embodiment, SEQ ID NO:1 and SEQ ID NO:3 are linked together with a peptide linker and SEQ ID NO:2 and SEQ ID NO:4 are linked together with the peptide linker. In a further embodiment, the peptide linker consists of SEQ ID NO: 6. In another embodiment, the therapeutically effective amount is equal to or less than about 300mg. In a further embodiment, the

therapeutically effective amount is selected from the group consisting of 10mg, 20mg, 40mg, 80mg, 150mg and 300mg. An embodiment of the invention is a method of treating a disease mediated by IL-4 or IL-13 or IL-4 and IL-13-induced erythrocyte proliferation in a mammal which comprises administering a therapeutically effective amount of a dual V region antibody-like protein or a fragment of a dual V region antibody-like region that specifically binds to IL-4 and IL-13. In a further embodiment of the invention, the dual V region antibody-like protein or the fragment of a dual V region antibody-like region comprises a variable light chain comprising amino acid sequences SEQ ID NO:1 and SEQ ID NO: 3 and a variable heavy chain comprising amino acid sequences SEQ ID NO:2 and SEQ ID NO: 4. In a further embodiment, SEQ ID NO:1 and SEQ ID NO:3 are linked together with a peptide linker and SEQ ID NO:2 and SEQ ID NO:4 are linked together with the peptide linker. In a further embodiment, the peptide linker consists of SEQ ID NO: 6. In another embodiment, the therapeutically effective amount is equal to or less than about 300mg. In a further embodiment, the

therapeutically effective amount is selected from the group consisting of 10mg, 20mg, 40mg, 80mg, 150mg and 300mg.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 shows the effects of huTBTI3_2_1 on IL-4-induced or IL-13-induced Stat6 phosphorylation in IL-4- or IL-13-stimulated monocytes.

Figure 2 shows the effects of huTBTI3_2_1 on IL-4 and IL-13-stimulated IL-6 and eotaxin release from human lung fibroblasts from a idiopathic pulmonary fibrosis patient.

Figure 3 shows the effects of huTBTI3_2_1 on IL-4 and IL-13 induced LOX

expression in idiopathic pulmonary fibrosis pulmonary fibroblasts.

Figure 4 shows the effects of huTBTI3_2_1 on antigen-induced airway

hyperresponsiveness against allergen induced acute asthma in cynomolgus monkeys. Data are represented as mean ± s.e.m. ^* p<0.05, ^** p<0.01 compared with control antibody-treated group. Figure 5 shows the effects of huTBTI3_2_1 on antigen-induced accumulation of total leukocytes in airways against allergen induced acute asthma in cynomolgus monkeys. Data are represented as mean ± s.e.m. *p<0.05, **p<0.01 compared with control antibody-treated group.

Figure 6 shows the effects of huTBTI3_2_1 on antigen-induced accumulation of eosinophils in airways against allergen induced acute asthma in cynomolgous monkeys. Data are represented as mean ± s.e.m. *p<0.05, **p<0.01 compared with control antibody-treated group.

Figure 7 shows the effects of huTBTI3_2_1 on serum IgE titer from allergen induced acute asthma in cynomolgous monkeys. Data are represented as mean ± s.e.m.

*p<0.05, **p<0.01 compared with control antibody-treated group.

Figure 8 shows the effects of SAR156597 on IL-4 and IL-13 mediated TGF release from normal human bronchial epithelial cells (NHBE; left panel) and human small airway epithelial cells (SAEC; right panel).

Figure 9 shows a diagramatic representation of assays to measure total amount of human antibody in serum by measuring the concentration of human light chain κ (panel A); to measure the proportion of functional antibodies to IL-4 and IL-13 (panel B); and to measure anti-drug antibodies (ADA).

Figure 10 shows a time plot (panel A) representation of the mean serum

concentration of functional huTBTI3_2_1 after single dose intravenous perfusion administration of 2.5 mg/kg of huTBTI3_2_1 (Batch #LP08045) in PBS to a

Cynomolgus Monkey at day 0, 14, 21 28 and 35; the table (panel B) summarizes pharmacokinetic parameters after the 1 ^st dose and the 5 ^th dose of 2.5 mg/kg of huTBTI3_2_1 (Batch #LP08059) in PBS in monkeys.

Figure 1 1 shows the mean of SAR156597 plasma concentrations after a single subcutaneous dose from 10 to 300 mg from TDU1 1325. DETAILED DESCRIPTION OF THE INVENTION

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Each publication, patent application, patent, and other reference cited herein is incorporated by reference in its entirety to the extent that it is not inconsistent with this present disclosure.

It is noted here that, as used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural reference unless the context clearly dictates otherwise.

Furthermore, in accordance with the present invention there may be employed conventional molecular biology, microbiology, and recombinant DNA techniques within the skill of the art. Such techniques are explained fully in the literature. See, e.g., Sambrook, Fritsch & Maniatis, Molecular Cloning: A Laboratory Manual, Second Edition (1989) Cold Spring Harbor Laboratory Press, Cold Spring Harbor, New York (herein "Sambrook et al., 1989"); DNA Cloning: A Practical Approach, Volumes I and II (D.N. Glover ed. 1985); Oligonucleotide Synthesis (M.J. Gait ed. 1984); Nucleic Acid Hybridization [B.D. Hames & S.J.Higgins eds. (1985)]; Transcription And

Translation [B.D. Hames & S.J. Higgins, eds. (1984)]; Animal Cell Culture [R.I.

Freshney, ed. (1986)]; Immobilized Cells And Enzymes [IRL Press, (1986)]; B. Perbal, A Practical Guide To Molecular Cloning (1984); F.M. Ausubel et al. (eds.), Current Protocols in Molecular Biology, John Wiley & Sons, Inc. (1994).

The following non-limiting definitions of some terms and phrases are provided to guide the artisan.

"lnterleukin-4" (IL-4) relates to the naturally occurring, or endogenous mammalian IL-4 proteins and to proteins having an amino acid sequence which is the same as that of a naturally occurring or endogenous corresponding mammalian IL-4 protein {e.g. , recombinant proteins, synthetic proteins (i.e., produced using the methods of synthetic organic chemistry)). Accordingly, as defined herein, the term includes mature IL-4 protein, polymorphic or allelic variants, and other isoforms of an IL-4 and modified or unmodified forms of the foregoing (e.g., lipidated, glycosylated). Naturally occurring or endogenous IL-4 includes wild type proteins such as mature IL- 4, polymorphic or allelic variants and other isoforms and mutant forms which occur naturally in mammals (e.g., humans, non-human primates). Such proteins can be recovered or isolated from a source which naturally produces IL-4, for example. These proteins and proteins having the same amino acid sequence as a naturally occurring or endogenous corresponding IL-4, arc referred to by the name of the corresponding mammal. For example, where the corresponding mammal is a human, the protein is designated as a human IL-4. Several mutant IL-4 proteins are known in the art, such as those disclosed in WO 03/038041 .

"lnterleukin-13" (IL-13) refers to naturally occurring or endogenous mammalian IL-13 proteins and to proteins having an amino acid sequence which is the same as that of a naturally occurring or endogenous corresponding mammalian IL- 13 protein (e.g., recombinant proteins, synthetic proteins (i.e., produced using the methods of synthetic organic chemistry)). Accordingly, as defined herein, the term includes mature IL- 13 protein, polymorphic or allelic variants, and other isoforms of IL- 13 (e.g., produced by alternative splicing or other cellular processes), and modified or unmodified forms of the foregoing (e.g., Hpidated, glycosylated). Naturally occurring or endogenous IL- 13 include wild type proteins such as mature IL-13, polymorphic or allelic variants and other isoforms and mutant forms which occur naturally in mammals (e.g., humans, non- human primates). For example, as used herein IL-13 encompasses the human IL-13 variant in which Arg at position 1 10 of mature human IL-13 is replaced with Gin (position 1 10 of mature IL-13 corresponds to position 130 of the precursor protein) which is associated with asthma (atopic and nonatopic asthma) and other variants of IL-13. (Heinzmann el al, Hum Mol Genet. 9:549-559 (2000).) Such proteins can be recovered or isolated from a source which naturally produces IL-13, for example. These proteins and proteins having the same amino acid sequence as a naturally occurring or endogenous corresponding IL-13 are referred to by the name of the corresponding mammal. For example, where the corresponding mammal is a human, the protein is designated as a human IL-13. Several mutant IL-13 proteins are known in the art, such as those disclosed in WO 03/035847.

The phrase "substantially identical" with respect to an antibody chain polypeptide sequence may be construed as an antibody chain exhibiting at least 70%, 80%, 90%, 95%, 96%, 97%, 98%, 99% or more sequence identity to the reference polypeptide sequence. The term with respect to a nucleic acid sequence may be construed as a sequence of nucleotides exhibiting at least about 85%, 90%, 95%, 96%, 97%, 98%, 99% or more sequence identity to the reference nucleic acid sequence. Identity can be determined by using any bioinformatics tool available to one skilled in the art. For example, Basic Local Alignment Search Tool (BLAST) is commonly employed to determine sequence identity (Altschul et al., Journal of Molecular Biology 215(3):403-410, 1990).

The terms, "identity" or "homology" may mean the percentage of nucleotide bases or amino acid residues in the candidate sequence that are identical with the residue of a corresponding sequence to which it is compared, after aligning the sequences and introducing gaps, if necessary, to achieve the maximum percent identity for the entire sequence, and not considering any conservative substitutions as part of the sequence identity. Neither N-terminal or C-terminal extensions nor insertions shall be construed as reducing identity or homology. Methods and computer programs for the alignment are available and well known in the art. Sequence identity may be measured using sequence analysis software.

The phrases and terms "functional fragment, variant, derivative or analog" and the like, as well as forms thereof, of an antibody or antigen is a compound or molecule having qualitative biological activity in common with a full-length antibody or antigen of interest. For example, a functional fragment or analog of an anti-IL-4 antibody is one which can bind to an IL-4 molecule or one which can prevent or substantially reduce the ability of a ligand, or an agonistic or antagonistic antibody, to bind to IL-4.

"Substitutional" variants are those that have at least one amino acid residue in a native sequence removed and replaced with a different amino acid inserted in its place at the same position. The substitutions may be single, where only one amino acid in the molecule is substituted, or may be multiple, where two or more amino acids are substituted in the same molecule. The plural substitutions may be at consecutive sites. Also, one amino acid can be replaced with plural residues, in which case such a variant comprises both a substitution and an insertion. "Insertional" variants are those with one or more amino acids inserted immediately adjacent to an amino acid at a particular position in a native sequence. Immediately adjacent to an amino acid means connected to either the a-carboxyl or a-amino functional group of the amino acid. "Deletional" variants are those with one or more amino acids in the native amino acid sequence removed. Ordinarily, deletional variants will have one or two amino acids deleted in a particular region of the molecule.

The term "antibody" is used in the broadest sense, and specifically covers monoclonal antibodies (including full length monoclonal antibodies), polyclonal antibodies, multispecific antibodies (e.g., bispecific antibodies), antibody fragments or synthetic polypeptides carrying one or more CDR or CDR-derived sequences so long as the polypeptides exhibit the desired biological activity. Antibodies (Abs) and immunoglobulins (Igs) are glycoproteins having the same structural characteristics. Generally, antibodies are considered Igs with a defined or recognized specificity. Thus, while antibodies exhibit binding specificity to a specific target, immunoglobulins include both antibodies and other antibody-like molecules which lack target specificity. The antibodies of the invention can be of any class (e.g., IgG, IgE, IgM, IgD, IgA and so on), or subclass (e.g., Igd , lgG ₂ , lgG _2a , lgG ₃ , lgG ₄ , IgAi, lgA ₂ and so on) ("type" and "class", and "subtype" and ""subclass", are used interchangeably herein). Native or wildtype, that is, obtained from a non-artificially manipulated member of a population, antibodies and immunoglobulins are usually heterotetrameric glycoproteins of about 150,000 daltons, composed of two identical light (L) chains and two identical heavy (H) chains. Each heavy chain has at one end a variable domain (V _H ) followed by a number of constant domains. Each light chain has a variable domain at one end (V _L ) and a constant domain at the other end. By "non-artificially manipulated" is meant not treated to contain or express a foreign antigen binding molecule. Wildtype can refer to the most prevalent allele or species found in a population or to the antibody obtained from a non-manipulated animal, as compared to an allele or polymorphism, or a variant or derivative obtained by a form of manipulation, such as mutagenesis, use of recombinant methods and so on to change an amino acid of the antigen-binding molecule.

As used herein, "anti-IL-4 antibody" means an antibody or polypeptide derived therefrom (a derivative) which binds specifically to IL-4 as defined herein, including, but not limited to, molecules which inhibit or substantially reduce the binding of IL-4 to its receptor or inhibit IL-4 activity. As used herein, "anti-IL-13 antibody" means an antibody or polypeptide derived therefrom (a derivative) which binds specifically to IL-13 as defined herein, including, but not limited to, molecules which inhibit or substantially reduce the binding of IL-13 to its receptor or inhibit IL-13 activity.

The term "variable" in the context of a variable domain of antibodies refers to certain portions of the pertinent molecule which differ extensively in sequence between and among antibodies and are used in the specific recognition and binding of a particular antibody for its particular target. However, the variability is not evenly distributed through the variable domains of antibodies. The variability is concentrated in three segments called complementarity determining regions (CDRs; i.e., CDR1 , CDR2, and CDR3) also known as hypervariable regions, both in the light chain and the heavy chain variable domains. The more highly conserved portions of variable domains are called the framework (FR) regions or sequences. The variable domains of native heavy and light chains each comprise four FR regions, largely adopting a β- sheet configuration, connected by three CDRs, which form loops connecting, and in some cases forming part of, the β-sheet structure. The CDRs in each chain are held together often in proximity by the FR regions and, with the CDRs from the other chain, contribute to the formation of the target (epitope or determinant) binding site of antibodies (see Kabat et al. Sequences of Proteins of Immunological Interest, National Institute of Health, Bethesda, MD (1987)). As used herein, numbering of immunoglobulin amino acid residues is done according to the immunoglobulin amino acid residue numbering system of Kabat et al., unless otherwise indicated. One CDR can carry the ability to bind specifically to the cognate epitope.

The term "hinge" or "hinge region" as used in the present invention refers to the flexible polypeptide comprising the amino acids between the first and second constant domains of an antibody.

The term "antibody fragment" refers to a portion of an intact or a full-length chain or an antibody, generally the target binding or variable region. Examples of antibody fragments include, but are not limited to, F _a b, F _a b', F _(a b')2 and F _v fragments. A "functional fragment" or "analog of an anti-IL-4 and/or IL-13 antibody" is one which can prevent or substantially reduce the ability of the receptor to bind to a ligand or to initiate signaling. As used herein, functional fragment generally is synonymous with, "antibody fragment" and with respect to antibodies, can refer to fragments, such as F _v , Fab, F ₍ ab')2 and so on which can prevent or substantially reduce the ability of the receptor to bind to a ligand or to initiate signaling. An "F _v " fragment consists of a dimer of one heavy and one light chain variable domain in a non-covalent association (VH-VL dimer). In that configuration, the three CDRs of each variable domain interact to define a target binding site on the surface of the V _H -V _L dimer, as in an intact antibody. Collectively, the six CDRs confer target binding specificity on the intact antibody. However, even a single variable domain (or half of an F _v comprising only three CDRs specific for a target) can have the ability to recognize and to bind target.

"Single-chain F _v ," "sF _v " or "scAb" antibody fragments comprise the V _H and V _L domains of an antibody, wherein these domains are present in a single polypeptide chain. Generally, the F _v polypeptide further comprises a polypeptide linker, often a flexible molecule, between the V _H and V _L domains, which enables the sFv to form the desired structure for target binding.

The term "diabodies" refers to antibody fragments with two antigen-binding sites, which fragments can comprise a heavy chain variable domain (V _H ) connected to a light chain variable domain (V _L ) in the same polypeptide chain. By using a linker that is too short to allow pairing between the two variable domains on the same chain, the diabody domains are forced to pair with the binding domains of another chain to create two antigen-binding sites.

The Fab fragment contains the variable and constant domains of the light chain and the variable and first constant domain (Cm) of the heavy chain. F _a b' fragments differ from F _a b fragments by the addition of a few residues at the carboxyl terminus of the Cm domain to include one or more cysteines from the antibody hinge region. F _a b' fragments can be produced by cleavage of the disulfide bond at the hinge cysteines of the F ₍ ab')2 pepsin digestion product. Additional enzymatic and chemical treatments of antibodies can yield other functional fragments of interest.

The term "linear Fab" refers to a tetravalent antibody as described by Miller et al. (2003), J Immunol. 170: 4854-4861 . The "linear Fab" is composed of a tandem of the same CH1 -VH domain, paired with the identical light chain at each CH1 -VH position. These molecules have been developed in order to increase the valency of an antibody to enhance its functional affinity through the avidity effect, but they are monospecific. The term "bispecific antibodies (BsAbs)" refers to molecules which combine the antigen-binding sites of two antibodies within a single molecule. Thus, a bispecific antibody is able to bind two different antigens simultaneously. Besides applications for diagnostic purposes, BsAbs pave the way for new therapeutic applications by redirecting potent effector systems to diseased areas or by increasing neutralizing or stimulating activities of antibodies.

Monoclonal antibodies herein specifically include "chimeric" antibodies in which a portion of the heavy and/or light chain is identical with or homologous to corresponding sequences in antibodies derived from a particular species or belonging to a particular antibody class or subclass (type or subtype), with the remainder of the chain(s) identical with or homologous to corresponding sequences in antibodies derived from another species or belonging to another antibody class or subclass, as well as fragments of such antibodies, so long as they exhibit the desired biological activity of binding to IL-4 and/or IL-13 or impacting IL-4 and/or IL-13 activity or metabolism (U.S. Pat. No. 4,816,567; and Morrison et al., Proc Natl Acad Sci USA 81 :6851 (1984)). Thus, CDRs from one class of antibody can be grafted into the FR of an antibody of different class or subclass.

Monoclonal antibodies are highly specific, being directed against a single target site, epitope or determinant. Furthermore, in contrast to conventional (polyclonal) antibody preparations which typically include different antibodies directed against different determinants (epitopes) of an antigen, each monoclonal antibody is directed against a single determinant on the target. In addition to their specificity, monoclonal antibodies are advantageous being synthesized by a host cell, uncontaminated by other immunoglobulins, and provides for cloning the relevant gene and mRNA encoding the antibody of chains thereof. The modifier "monoclonal" indicates the character of the antibody as being obtained from a substantially homogeneous population of antibodies, and is not to be construed as requiring production of the antibody by any particular method. For example, the monoclonal antibodies for use with the present invention may be isolated from phage antibody libraries using well known techniques or can be purified from a polyclonal preparation. The parent monoclonal antibodies to be used in accordance with the present invention may be made by the hybridoma method described by Kohler et al., Nature 256:495 (1975), or may be made by recombinant methods well known in the art. The term "polyvalent antibody" as used in the present invention refers to an antibody comprising two or more antigen binding sites, thus being able to bind two or more antigens, which may have the same or a different structure, simultaneously. The term "bivalent" means that the antibody comprises two antigen binding sites. The term "tetravalent" means that the antibody comprises four antigen binding sites.

The term "antigen binding site" as used in the present invention refers to the part of the antibody which comprises the area which specifically binds to and is complementary to part or all of an antigen. Where an antigen is large, an antibody may only bind to a particular part of the antigen, which part is termed on epitope. An antigen binding domain may be provided by one or more antibody variable domains. Preferably, an antigen binding domain is made of the association of an antibody light chain variable domain (VL) and an antibody heavy chain variable domain (VH).

The term "antigen" as used in the present invention refers to a molecule or a portion of a molecule capable of being bound by the antibodies of the present invention. An antigen can have one or more than one epitope. Examples of antigens recognized by the antibodies of the present invention include, but are not limited to, serum proteins, e.g. cytokines such as IL-4, IL-5, IL-9 and IL-13, bioactive peptides, cell surface molecules, e.g. receptors, transporters, ion-channels, viral and bacterial proteins.

The term "monospecific" as used in the present invention means that the polyvalent antibody of the present invention recognizes only one antigen, all the antigen binding sites being identical.

The term "bispecific" as used in the present invention means that the polyvalent antibody of the present invention recognizes two different epitopes on the same or on two different antigens.

It has been of interest to produce bispecific antibodies (BsAbs) which combine the antigen-binding sites of two antibodies within a single molecule. Thus, such a molecule would be able to bind two different antigens simultaneously. Besides applications for diagnostic purposes, they pave the way for new therapeutic

applications, e.g. by redirecting potent effector systems to diseased areas (where cancerous cells often develop mechanisms to suppress normal immune responses triggered by monoclonal antibodies, like antibody-dependent cellular cytotoxicity (ADCC) or complement-dependent cytotoxicity (CDC)), or by increasing neutralizing or stimulating activities of antibodies. Initial attempts to couple the binding

specificities of two whole antibodies against different target antigens for therapeutic purposes utilized chemically fused heteroconjugate molecules (Staerz et al.(1985), Nature 314: 628-631 ).

Bispecific antibodies were originally made by fusing two hybridomas, each capable of producing a different immunoglobulin (Milstein and Cuello, 1983, 1984), but the complexity of species (up to ten different species) produced in cell culture makes purification difficult and expensive (George and Huston, 1997). Despite the promising results obtained using heteroconjugates or bispecific antibodies produced from cell fusions as cited above, several factors made them impractical for large scale therapeutic applications. Such factors include: rapid clearance of

heteroconjugates in vivo, the laboratory intensive techniques required for generating either type of molecule, the need for extensive purification of heteroconjugates away from homoconjugates or mono-specific antibodies and generally low yields.

Genetic engineering has been used with increasing frequency to design, modify, and produce antibodies or antibody derivatives with a desired set of binding properties and effector functions. A variety of recombinant methods have been developed for efficient production of BsAbs, both as antibody fragments (Carter et al. (1995), J. Hematotherapy 4: 463-470; Pluckthun et al. (1997) Immunotechology 3: 83-105; Todorovska et al. (2001 ) J. Immunol. Methods 248: 47-66) and full length IgG formats (Carter (2001 ) J. Immunol. Methods 248: 7-15).

Abbott described in US patent US7612181 a murine Dual-Variable-Domain IgG (DVD-lgG) bispecific antibody, which is based on the dual-Fv format described in Unilever patent (US5989830). A humanized bispecific format was described in WO2009/052081 (TBTI) which is incorporated herein by reference in its entirety. The addition of constant domains to respective chains of the Dual-Fv (CH1 -Fc to the heavy chain and kappa or lambda constant domain to the light chain) led to functional bispecific dual V region antibody like binding proteins.

An embodiment of the invention is a bispecific antibody that has been engineered to comprise a dual V region antibody-like protein or fragment thereof that specifically binds to two different epitopes on the same or on two different antigens. An embodiment of the invention a bispecific antibody or bispecific antibody fragment thereof that specifically binds to IL-13 and IL-4, wherein said bispecific antibody or bispecific antibody fragment thereof comprises a variable light chain domain and a variable heavy chain domain, wherein said variable light chain domain comprises amino acid sequences SEQ ID NO:1 and SEQ ID NO:3. A further embodiment of the invention is a bispecific antibody or bispecific antibody fragment thereof that specifically binds to IL-13 and IL-4, wherein said bispecific antibody or bispecific antibody fragment thereof comprises a variable light chain domain and a variable heavy chain domain, wherein said variable heavy chain domain comprises amino acid sequences SEQ ID NO:2 and SEQ ID NO:5. Another embodiment of the invention is a bispecific antibody or bispecific antibody fragment thereof that specifically binds to IL-13 and IL-4, wherein said bispecific antibody or bispecific antibody fragment thereof comprises a variable light chain domain and a variable heavy chain domain, wherein said variable heavy chain domain comprises amino acid sequences SEQ ID NO:2 and SEQ ID NO:4. An embodiment of theinvention is a bispecific antibody or bispecific antibody fragment thereof that specifically binds to IL- 13 and IL-4, wherein said bispecific antibody or bispecific antibody fragment thereof comprises a variable light chain domain comprising amino acid sequences SEQ ID NO:1 and SEQ ID NO:3, and a variable heavy chain domain comprising amino acid sequences SEQ ID NO:2 and SEQ ID NO:4. A further embodiment of the invention is a bispecific antibody or bispecific antibody fragment thereof that specifically binds to IL-13 and IL-4, wherein said bispecific antibody or bispecific antibody fragment thereof comprises a variable light chain domain comprising amino acid sequences SEQ ID NO:1 and SEQ ID NO:3, and a variable heavy chain domain comprising amino acid sequences SEQ ID NO:2 and SEQ ID NO:4, wherein a peptide linker links SEQ ID NO:1 to SEQ ID NO:3, and a peptide linker links SEQ ID NO:2 to SEQ ID NO:4. An embodiment of the invention is huTBTI3_2_1 or SAR156597 comprising a bispecific antibody or bispecific antibody fragment thereof that specifically binds to IL- 13 and IL-4, comprising (a) variable light chain domain comprising the amino acid sequences of SEQ ID NO:1 and SEQ ID NO:3; (b) a variable heavy chain domain comprising the amino acid sequences of SEQ ID NO:2 and SEQ ID NO:4; (c) a peptide linker linking SEQ ID NO:1 to SEQ ID NO:3, and a peptide linker linking SEQ ID NO:2 to SEQ ID NO:4 wherein the peptide linker has an amino acid sequence consisting of SEQ ID NO:6; and (d) constant region domains. The term "multispecific" as used in the present invention means that the polyvalent antibody of the present invention recognizes multiple different epitopes on the same or on multiple different antigens.

The term "linker" as used in the present invention refers to a peptide adapted to connect the variable domains of the antibody constructs of the present invention. The peptide linker may contain any amino acids, the amino acids glycine (G) and serine (S) being preferred. The linkers may be equal or differ from each other between and within the heavy chain polypeptide and the light chain polypeptide. Furthermore, the linker may have a length of 1 , 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1 , 12, 13, 14, 15, 16, 17, 18, 19 or 20 amino acids. A preferred peptide linker unit for the heavy chain domains as for the light chain domains is GGGGS. The numbers of linker units of the heavy chain and of the light chain may be equal (symmetrical order) or differ from each other (asymmetrical order).

A peptide linker is preferably long enough to provide an adequate degree of flexibility to prevent the antibody moieties from interfering with each others activity, for example by steric hindrance, to allow for proper protein folding and, if necessary, to allow the antibody molecules to interact with two or more, possibly widely spaced, receptors on the same cell; yet it is preferably short enough to allow the antibody moieties to remain stable in the cell.

Therefore, the length, composition and/or conformation of the peptide linkers can readily be selected by one skilled in the art in order to optimize the desired properties of the polyvalent antibody.

"Humanized" forms of non-human (e.g., murine) antibodies are chimeric immunoglobulins, immunoglobulin chains or fragments thereof (such as F _v , F _a b, F _a ty, F(ab')2 or other target-binding subsequences of antibodies) which contain sequences derived from non-human immunoglobulin, as compared to a human antibody. In general, the humanized antibody will comprise substantially all of one, and typically two, variable domains, in which all or substantially all of the CDR regions correspond to those of a non-human immunoglobulin and all or substantially all of the FR regions are those of a human immunoglobulin template sequence. The humanized antibody may also comprise at least a portion of an immunoglobulin constant region (F _c ), typically that of the human immunoglobulin template chosen. In general, the goal is to have an antibody molecule that is minimally immunogenic in a human. Thus, it is possible that one or more amino acids in one or more CDRs also can be changed to one that is less immunogenic to a human host, without substantially minimizing the specific binding function of the one or more CDRs to IL-4 and/or IL-13. Alternatively, the FR can be non-human but those amino acids most immunogenic are replaced with ones less immunogenic. Nevertheless, CDR grafting, as discussed above, is not the only way to obtain a humanized antibody. For example, modifying just the CDR regions may be insufficient as it is not uncommon for framework residues to have a role in determining the three-dimensional structure of the CDR loops and the overall affinity of the antibody for its ligand. Hence, any means can be practiced so that the non-human parent antibody molecule is modified to be one that is less immunogenic to a human, and global sequence identity with a human antibody is not always a necessity. So, humanization also can be achieved, for example, by the mere substitution of just a few residues, particularly those which are exposed on the antibody molecule and not buried within the molecule, and hence, not readily accessible to the host immune system. Such a method is taught herein with respect to substituting "mobile" or "flexible" residues on the antibody molecule, the goal being to reduce or dampen the immunogenicity of the resultant molecule without comprising the specificity of the antibody for its epitope or determinant. See, for example, Studnicka et al., Prot Eng 7(6)805-814, 1994; Mol Imm 44:1986-1988, 2007; Sims et al., J Immunol 151 :2296 (1993); Chothia et al., J Mol Biol 196:901 (1987); Carter et al., Proc Natl Acad Sci USA 89:4285 (1992); Presta et al., J Immunol 151 :2623 (1993), WO 2006/042333 and U.S. Pat. No. 5,869,619.

"Antibody homolog" or "homolog" refers to any molecule which specifically binds IL-4 and/or IL-13 as taught herein. Thus, an antibody homolog includes native or recombinant antibody, whether modified or not, portions of antibodies that retain the biological properties of interest, such as binding IL-4 or IL-13, such as an F _a b or F _v molecule, a single chain antibody, a polypeptide carrying one or more CDR regions and so on. The amino acid sequence of the homolog need not be identical to that of the naturally occurring antibody but can be altered or modified to carry substitute amino acids, inserted amino acids, deleted amino acids, amino acids other than the twenty normally found in proteins and so on to obtain a polypeptide with enhanced or other beneficial properties. Antibodies with homologous sequences are those antibodies with amino acid sequences that have sequence homology with the amino acid sequence of a IL-4, IL- 13 or bispecific IL-4/IL-13 antibody of the present invention. Preferably, homology is with the amino acid sequence of the variable regions of an antibody of the present invention. "Sequence homology" as applied to an amino acid sequence herein is defined as a sequence with at least about 90%, 91 %, 92%, 93%, 94%, 95%, 96%, 97%, 98% or 99% sequence homology to another amino acid sequence, as determined, for example, by the FASTA search method in accordance with Pearson & Lipman, Proc Natl Acad Sci USA 85, 2444-2448 (1988).

A chimeric antibody is one with different portions of an antibody derived from different sources, such as different antibodies, different classes of antibody, different animal species, for example, an antibody having a variable region derived from a murine monoclonal antibody paired with a human immunoglobulin constant region and so on. Thus, a humanized antibody is a species of chimeric antibody. Methods for producing chimeric antibodies are known in the art, see, e.g., Morrison, 1985, Science 229:1202; Oi et al., 1986, BioTechniques 4:214; Gillies et al., 1989, J Immunol Methods 125:191 -202; and U.S. Pat. Nos. 5,807,715, 4,816,567, and 4,816,397.

Artificial antibodies include scFv fragments, chimeric antibodies, diabodies, triabodies, tetrabodies and mru (see reviews by Winter & Milstein, 1991 , Nature 349:293-299; and Hudson, 1999, Curr Opin Imm 1 1 :548-557), each with antigen- binding or epitope-binding ability. In the single chain F _v fragment (scF _v ), the V _H and V _L domains of an antibody are linked by a flexible peptide. Typically, the linker is a peptide of about 15 amino acids. If the linker is much smaller, for example, 5 amino acids, diabodies are formed. The smallest binding unit of an antibody is a CDR, typically the CDR2 of the heavy chain which has sufficient specific recognition and binding capacity. Such a fragment is called a molecular recognition unit or mru. Several such mrus can be linked together with short linker peptides, therefore forming an artificial binding protein with higher avidity than a single mru.

Also included within the scope of the invention are functional equivalents of an antibody of interest. The term "functional equivalents" includes antibodies with homologous sequences, antibody homologs, chimeric antibodies, artificial antibodies and modified antibodies, for example, wherein each functional equivalent is defined by the ability to bind to IL-4 and/or IL-13, inhibiting IL-4 and/or IL-13 signaling ability or function, or inhibiting binding of IL-4 and/or IL-13 to its receptor. The skilled artisan will understand that there is an overlap in the group of molecules termed "antibody fragments" and the group termed "functional equivalents." Methods of producing functional equivalents which retain IL-4 and/or IL-13 binding ability are known to the person skilled in the art and are disclosed, for example, in WO 93/21319, EPO Ser. No. 239,400, WO 89/09622, EPO Ser. No. 338,745 and EPO Ser. No. 332,424.

The functional equivalents of the present application also include modified antibodies, e.g., antibodies modified by the covalent attachment of any type of molecule to the antibody. For example, modified antibodies include antibodies that have been modified, e.g., by glycosylation, acetylation, pegylation, deamidation, phosphorylation, amidation, derivatization by known protecting/blocking groups, proteolytic cleavage, linkage to a cellular ligand, linkage to a toxin or cytotoxic moiety or other protein etc. The covalent attachment need not yield an antibody that is immune from generating an anti-idiotypic response. The modifications may be achieved by known techniques, including, but not limited to, specific chemical cleavage, acetylation, formylation, metabolic synthesis etc. Additionally, the modified antibodies may contain one or more non-classical amino acids.

"Mammal" for purposes of treatment refers to any animal classified as a mammal, including human, domestic and farm animals, nonhuman primates, and zoo, sports or pet animals, such as dogs, horses, cats, cows etc.

The term "treatment", "therapeutic dose" or "administering a therapeutically effective amount" as used in the present invention refers to both therapeutic treatment and prophylactic or preventative measures as a course of therapy. It refers to preventing, curing, reversing, attenuating, alleviating, minimizing, suppressing or halting deleterious effects of a disease state, disease progression, disease causative agent (e.g., bacteria or viruses) or other abnormal condition.

An embodiment of the invention is the treatment of asthma and idiopathic pulmonary fibrosis. IL-4 and IL-13 are therapeutically important cytokines based on their biological functions and play critical roles in many diseases, including asthma (Curr Opin Allergy Clin Immunol 2005, Vo. 5, 161 -166). IL-4 has been shown to be able to inhibit autoimmune disease and IL-4 and IL-13 have both shown the potential to enhance anti-tumor immune responses. Elevations in IL-4 and IL-13 and their receptors have been linked to the pathogenesis of idiopathic pulmonary fibrosis (IPF) (Jakubzick C. et al., Am J Pathol. 2004:164(6):1989-2001 ; Murray LA et al. Int J Biochem Cell Biol. 2008:40(10):2174-82. Evidence in the literature demonstrate that the TH2 cytokines IL-4 and IL-13 play multiple roles in the pathogenesis of IPF as mediators of this lung tissue remodeling and fibrosis (Wynn, TA, Naat. Rev. Immunol, 4:583-594, 2004) and other cell types including mast cells, basophils, eosinophils, macrophages and epithelial cells may also be potential sources of these cytokines (Gordon S and Martinez FO, Immunity Rev. 32:593-604, 2010). In IPF patients, IL-13 and IL-4 levels in bronchial alveolar lavage fluid are elevated compared to normal controls. Such evidence suggests that therapies capable of suppressing or neutralizing these cytokines have the potential for delaying the progression of fibrosis in IPF patients. Since both cytokines are involved in the pathogenesis of allergic diseases or fibrotic diseases, inhibitors of these cytokines could provide therapeutic benefits.

An "isolated" or "purified" antibody is substantially free of cellular material or other contaminating proteins from the cell or tissue source or medium from which the protein is derived, or substantially free of chemical precursors or other chemicals when chemically synthesized. The language "substantially free of cellular material" includes preparations of an antibody in which the polypeptide/protein is separated from cellular components of the cells from which same is isolated or recombinantly produced. Thus, an antibody that is substantially free of cellular material includes preparations of the antibody having less than about 30%, 20%, 10%, 5%, 2.5% or 1 %, (by dry weight) of contaminating protein. When the antibody is recombinantly produced, it is also preferably substantially free of culture medium, i.e., culture medium represents less than about 20%, 10%, 5%, 2.5% or 1 % of the volume of the protein preparation. When antibody is produced by chemical synthesis, it is preferably substantially free of chemical precursors or other chemicals and reagents, i.e., the antibody of interest is separated from chemical precursors or other chemicals which are involved in the synthesis of the protein. Accordingly, such preparations of the antibody have less than about 30%, 20%, 10%, 5% or 1 % (by dry weight) of chemical precursors or compounds other than antibody of interest. In a preferred embodiment of the present invention, antibodies are isolated or purified. As used herein, the terms "therapeutic agent" and "therapeutic agents" refer to any agent(s) which can be used in the treatment, management or amelioration of a disease, disorder, malady and the like associated with aberrant IL-4 and/or IL-13 metabolism and activity.

As used herein, "therapeutic dose" refers to the quantity of any agent(s) which can be used in the treatment, management or amelioration of a disease, disorder, malady and the like associated with aberrant IL-4 and/or IL-13 metabolism and activity.

As used herein, "safe therapeutic dose" refers to any agent(s) or dose of any agent(s) which can be used in the treatment, management or amelioration of a disease, disorder, malady and the like associated with aberrant IL-4 and/or IL-13 metabolism and activity while maintaining a clinically acceptable benefit/risk profile. A safe therapeutic dose is selected form the group consisting of 10 mg, 20 mg, 40 mg, 80 mg, 150 mg and 300 mg. An embodiment of a safe therapeutic dose is about 10 mg to about 300 mg. A further embodiment of a safe therapeutic dose is any dose that is about 300 mg or less than about 300mg.

An embodiment of the invention is identifying or monitoring a safe therapeutic dose by measuring one or more events selected from the group consisting of intensive treatment in an emergency room or at home for allergic bronchospasm, blood dyscrasias, convulsions, alanine aminotransferase (ALT) >3 x upper limit of normal range (ULN) associated with total bilirubin >2 x ULN, asymptomatic ALT increase >10 x ULN, development of drug dependency or drug abuse, ALT increase >2 x ULN, hsCRP >10 mg/L for >72 hours, cardiac troponin I (cTnl) >2 x ULN, a ventricular depolarization and repolarization time (QT) on an electrocardiogram (ECG) machine wherein the QT is automatically corrected by the ECG machine (QTc) that is QTc >500 ms, severe skin reactions local to the site of IP injection and a level of C-reactive protein (CRP) is less than 20 mg/L. The methods used to calculate the afore-mentioned events are discussed in detail in the examples presented below. Methods used to calculate the afore-mentioned events are commonly know to those skilled in the art.

Intracellular signaling after ligation of IL-4 and IL-13 with their cell surface receptors is mediated in part by phosphorylation of the signaling molecule signal transducer and activator of transcription 6 (Stat6). Therefore, inhibition of Stat6 phosphorylation (pStat6) can be used to test the ability of a molecule to inhibit activation of the IL-4 and IL-13 receptors.

IL-4 and IL-13 stimulate the release of IL-6 and eotaxin from human idiopathic pulmonary fibrosis lung fibroblasts. Therefore, inhibition of IL-6 and eotaxin release can be used to test the ability of a molecule to inhibit activation of the IL-4 and IL-13 receptors.

An embodiment of the invention is an antibody that inhibits IL-4- or IL-13- induced STAT6 phophorylation, IL-6 release or eotaxin with an IC50 about 0.01 nM to about 100nM. A further embodiment encompasses an IC50 about 0.1 nM to about 10nM. A further emobodiment encompasses an IC50 about 0.1 nM to about 10nM. Additional embodiments of the invention are IC50 values about 0.1 , 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1 .0, 1 .1 , 1 .2, 1 .3, 1 .4 1 .5, 1 .6, 1 .7, 1 .8, 1 .9, 2.0, 2.2., 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3.0, 3.1 , 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4.0, 4.1 , 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, 5.0, 5.1 , 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9, 6.0, 6.1 , 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9, 7.0, 7.1 , 7.2, 7.3, 7.4, 7.5, 7.7, 7.8, 7.9, 8.0, 8.1 , 8.2, 8.3, 8.4, 8.5, 8.6, 8.7, 8.8, 8.9, 9.0, 9.1 , 9.2, 9.3, 9.4, 9.5, 9.6, 9.7, 9.8, 9.9 or 10.0 nM.

The term "about" when used in connection with a numerical value is meant to encompass numerical values within a range having a lower limit that is 5%, 10% or 15% smaller than the indicated numerical value and having an upper limit that is 5%, 10% or 15% larger than the indicated numerical value.

An embodiment of the invention is detection methods to measure total human antibody levels or the proportion of a specific antibody (for example, a bispecific antibody) or to measure anti-drug antibodies in a test sample. The test sample can be any bodily sample from a mammal. Non-limiting examples include blood samples, serum samples or tissue samples. Detection methods may involve using a "capture device" in which one or more antibodies are attached to the capture device. Nonlimiting examples of "capture devices" include wells of a plate wherein the plate may include any number of wells such as a 12 well plate or a 96 well plate. However, capture devices are not limited to plates but may include any substrate that an antibody may attach to, for example, an elution column. An embodiment of the invention utilizes tag-labeled antibodies. The tag can be any tag capable of detection. Nonlimiting examples include fluorescent tags such as rhodamine, enzymatic tags such as luciferase or sulfo-tags. EXAMPLES

The instant invention may be better understood by reference to the following non-limiting Examples, which are exemplary of the invention. The Examples presented below

should in no way be construed as limiting the broad scope of the invention.

The terms "huTBTI3_2_1 " and "SAR156597" are interchangeable and refer to the same dual V region antibody-like protein comprising a variable light chain comprising amino acid sequences SEQ ID NO:1 and SEQ ID NO:3 and a variable heavy chain comprising amino acid sequences SEQ ID NO:2 and SEQ ID NO:4.

Example 1 : Cloning and Generation of Humanized Anti-IL-4/IL-13 Bispecific Antibodies

The cloning and generation of humanized anti-IL-4/IL-13 bispecific antibodies is described in WO2009/052081 (PCT/US2008/079787), herein incorporated by reference in its entirety. For ease of reference, a brief description follows.

The format used for the expression of bispecific antibodies (BsAb) is an IgG variant of the dual domain double head format described in US 5,989,830. In this format an IgG molecule is elongated at its N-terminus on the corresponding heavy and light chains, by an additional variable domain of a second antibody. Thus, the resulting IgG molecule is a heterotetramer composed of two heavy and two light chains. The heavy chains consist of two variables heavy domains (VH1 -VH2) deriving from two different antibodies joined together by a linker composed of ten amino acids (G4S) ₂ and fused to the lgG4 constant domain. The light chains consist of two variables light domains (VL1 -VL2) deriving from two different antibodies joined together by a linker composed of ten amino acids (G4S)2 and fused to the constant kappa region.

Sequences for the variable heavy and light domains of the 8D4-8 variants (8D4-8; mouse anti-IL-4 monoclonal antibody clone 8D4-8 from Biozol diagnostica Vertrieb GmbH, Eching Germany; Biozol is the German distributor of BioLegend, San Diego, CA, USA) were generated by PCR introducing a BamHI restriction site (GGA TCP at their respective 5'-ends encoding a part of the (G4S)?-(GGA TCO-8D4-8. The 3' sequence of the VH of the 8D4-8 humanized variants ended with an Apal restriction site (encoding the first amino acids of the CH1 domain) for a later fusion to the IGHG4 sequence (Q569F4, with deletion of the terminal Lys and a double mutation S241 P and L248E). The 3'-end of the VL8D4-8 ended with a BsiWI restriction site encoding the first two amino acids of the constant kappa chain for a later fusion to IGKC (Gene Bank Accession Number Q502W4).

Sequences for the variable heavy and light domains of the B-B13 variants(B- B13; mouse anti-IL-13 monoclonal antibody clone B-B13 from Cell Sciences, Inc., Canton, MA USA) were generated by PCR introducing a BamHI restriction site at their respective 3'-ends encoding a part of the (G4S) ₂ -(B-B13)-(GGA GGC GGA GGG TCC GGA GGC GGA GGA TCC (SEQ ID NO: 7)). Both sequences for the VH and VL of the B-B13 variants were generated with a Nhel restriction site at their respective 5'-ends, followed by an ATG start codon and a leader peptide encoding sequence.

The VH of B-B13 and 8D4-8 were fused together through their BamHI sites within the (G4S) ₂ linker. The VL of B-B13 and 8D4-8 were fused to each other through their BamHI sites within the (G4S)2 linker. Hence the tandems of heavy and the light chains generated had the following composition.

Bispecific antibody heavy chain: Nhel- Leader peptide-VH-B-B13 - (G4S)2 - VH 8D4-8-Apal.

Bispecific antibody light chain: Nhel- Leader peptide-VL-B-B13 - (G4S) ₂ - VL 8D4-8- BsiWI.

All intermediate PCR fragments were cloned into into the pCR ^® 4-TOPO using the Invitrogen TOPO TA cloning kit (Cat #: 45-0641 ) and sequenced using M13forward and M13 reverse primers.

After sequence validation the heavy chain tandems were fused through their Apal site to the IGHG4 sequence and the variable light chain tandems were fused through their BsiWI site to IGKC. The created dual domain heavy chain and light chain were digested with Nhel and Hindlll and each ligated into the Nhel/Hindlll sites of the episomal expression vector pXL, creating the plasmids for mammalian expression of the TBTI-heavy and light chains respectively.

Four humanized bispecific anti-IL-4/anti-IL-13 constructs were generated based on the following combinations of humanized VH and VL versions of B-B13 and 8D4-8 as shown in Table 1. The corresponding light and heavy chain sequences are shown in Table 2.

Table 1. Bispecific anti-IL-4/anti-IL-13 Antibodies

Bispecific anti-IL-4/anti-IL-13 Ab Anti- IL-13 Fv Anti-IL-4 Fv

huTBTI3_1_1 B-B13VL3xVH2 8D4-8 VL1xVH2

huTBTI3_2_1 B-B13VL3xVH2 8D4-8 VL1xVH1

huTBTI3_1_2 B-B13VL2xVH2 8D4-8 VL1xVH2

huTBTI3_2_2 B-B13VL2xVH2 8D4-8 VL1xVH1

Table 2. Sequences of Humanized Variable Domains and Linker Sequence

Anti-IL13 hB-B13 VL3 (SEQ ID NO: 1):

DIVLTQSPAS LAVSLGQRAT ISCRASESVD SYGQSYMH Y QQKAGQPPKL LIYLASNLES GVPARFSGSG SRTDFTLTID PVQAEDAATY YCQQNAEDSR TFGGGTKLEI K

Anti-IL13 hB-B13 VH2 (SEQ ID NO: 2):

EVQLKESGPG LVAPGGSLSI TCTVSGFSLT DSSINWVRQP PGKGLEWLGM IWGDGRIDYA DALKSRLSIS KDSSKSQVFL EMTSLRTDDT A YYCARDGY FPYAMDFWGQ GTSVTVSS

Anti-IL4 h8D4-8 VL1 (SEQ ID NO: 3):

DIQMTQSPAS LSVSVGDTIT LTCHASQNID VWLSWFQQKP GNIPKLLIYK ASNLHTGVPS RFSGSGSGTG FTLTISSLQP EDIATYYCQQ AHSYPFTFGG

GTKLEIKR

Anti-IL4 h8D4-8 VH1 (SEQ ID NO: 4):

QVQLQQSGPE LVKPGASVKI SCKASGYSFT SYWIHWIKQR PGQGLEWIGM IDPSDGETRL NQRFQGRATL TVDESTSTAY MQLRSPTSED SAVYYCTRLK EYGNYDSFYF DVWGAGTLVT VSSA

Anti-IL4 h8D4-8 VH2 (SEQ ID NO: 5):

QVQLQQSGPE LVKPGASVKI SCKASGYSFT SYWIHWIKQR PGQGLEWIGM IDASDGETRL NQRFQGRATL TVDESTSTAY MQLRSPTSED SAVYYCTRLK EYGNYDSFYF DVWGAGTLVT VSSA

Linker Sequence (SEQ ID NO: 6)

GGGGSGGGGS

Underline indicates amino acid changes made for humanization or to remove residues subject to modification or acid lability. Bold indicates the CDR

Example 2: Effect of huTBTI3_2_1 on IL-4- or IL-13-induced STAT6 phosphorylation in human whole blood monocytes Human sodium citrate anti-coagulated whole blood was obtained from an on- site normal donor panel. Donor numbers 245, 217, 229 and 002 were used.

huTBTI3_2_1 was generated at sanofi-aventis, batch no. LP08059, supplied at 5.63 mg/ml in phosphate buffered saline (PBS) and stored at 4°C.

Recombinant human IL-13 (lyophilized) from R&D Systems, catalog no. 213-IL, was reconstituted with PBS containing 0.2% bovine serum albumin at 10 g/ml. Final concentration of IL-13 used in the assay was 3 ng/ml in complete RPMI medium.

Recombinant human IL-4 (lyophilized) from AMS Biotechnology LTD, catalog no.

1 1 1 -40-134, was reconstituted with PBS containing 0.2% bovine serum albumin at 20 g/ml. Final concentration of IL-4 used in the assay was 1 ng/ml in complete RPMI medium.

huTBTI3_2_1 was serial diluted with complete RPMI medium to make 10x solutions, and mixed with 100 μΙ of normal human peripheral blood per well in a 96- deep-well plate to reach final concentrations of huTBTI3_2_1 at 100 nM, 33.33 nM, 1 1 .1 1 nM, 3.70 nM, 1 .24 nM, 0.41 nM, 0.14 nM, 0.05 nM, 0.02 nM, and 0.005 nM for donor numbers 245, 217 and 002. For donor number 229, the final concentrations of huTBTI3_2_1 tested were 100 nM, 33.33 nM, 1 1 .1 1 nM, 3.70 nM, 1 .24 nM, 0.41 nM and 0.14 nM.

The plate was incubated in 37°C, 5% CO2 for 15 to 30 minutes. Then recombinant human IL-4 (1 ng/ml) or IL-13 (3 ng/ml) were added to each well, and the plate was further incubated in 37°C, 5% CO2 for 15 minutes. Blood cells were then lysed/fixed with lysis/fix buffer for 10 minutes at 37°C, centrifuged at 300x g for 5 minutes at room temperature. Supernatants were removed and the remaining cell pellet was washed once with phosphate-buffered saline. The cells were

permeabilized with pre-cooled methanol for 30 minutes in 4 °C and then washed once with FACS stain buffer (BD, catalog no. 554656). Fluorescence-labeled antibodies (anti-phospho-Stat6-Alexa Fluor 647 at 1 :5 final dilution, and anti-CD33-FITC at 1 :10 final dilution) were added to cells and incubated at room temperature in the dark for 30 minutes. After wash with FACS stain buffer, cells were acquired through a FACS Calibur™ flow cytometer to generate FACS data.

FACS data were analyzed by using CellQuest software™ (BD, version 5.2). Dot plots were created using CD33 staining (fluorescein isothiocyanate) versus pStat6 staining (Alexa Fluor 647) (see Figure 1 ). Total monocytes were gated based on side scatter versus forward scatter. CD33 ⁺ staining, Stat6-phosphorylation positive monocytes were gated based on the fluorescence intensity between baseline control and IL-4 or IL-13 stimulated samples in the absence of huTBTI3_2_1 .

Percent of pStat6 positive monocytes among total monocytes were obtained from region statistics based on CellQuest software (BD, version 5.2).

The effects of huTBTI3_2_1 on IL-4- or IL-13-induced Stat6 phosphorylation were determined using percent inhibition of maximum response (Stat6

phosphorylation) in IL-4- or IL-13-stimulated monocytes.

The maximum response was defined as the percent of pStat6 ⁺ cells generated by IL-4 or IL-13 stimulation in the absence of huTBTI3_2_1 . The percent of pStat6 ⁺ cells generated from unstimulated monocytes was used as baseline signal. The percent of maximum response was calculated using the following equation:

. _/n/ . , . % pStat6 ⁺ SAR156597 - % pStat6 baseline . _{nnn /}

Percent (%) of maximum response = x 100%

% pStat6 ⁺ maximum response ~ %) pStat6 ⁺ baseline

Dose-response curves were plotted as Y: % of maximum response versus X: concentrations (nM) of huTBTI3_2_1 by SPEED v2.0-LTS to calculate the

concentration giving 50% of maximum response (IC ₅ o).

Dose response curve was modeled by the four-parameter logistic model:

%Maximum _ response = c -\ j— -,— -— ry

1 + exp\b{log(dose) - log(e))}

The parameters c and d are the lower and upper limits, negative b is the relative slope around e, and the e parameter is IC ₅ o and is the dose producing a response half-way between the upper limit, d and lower limit, c. The four parameters ( b,c, d, e) were estimated by non-linear least squares method. SAS procedure NLIN in SAS system release 8.2 for sun Solaris via SPEED v2.0-LTS internal software was used. After obtaining the IC ₅ o estimation from each of the three curves, the geometric mean of the 3 IC ₅₀ values were calculated.

huTBTI3_2_1 inhibited IL-4-induced Stat6 phosphorylation in donors 245, 229 and 217 with IC ₅ os of 1 .32 nM, 0.73 nM, and 0.78 nM respectively. huTBTI3_2_1 inhibited IL-13-induced Stat6 phosphorylation in donors 245, 229 and 002 with IC ₅ o _s of 2.65 nM, 3.68 nM, and 1 .32 nM respectively.

The geometric mean IC ₅ oS of huTBTI3_2_1 in inhibiting IL-13 or IL-4-induced Stat6 phosphorylation from 3 separate experiments were 2.34 nM and 0.91 nM, respectively (Table 3).

Table 3. IC ₅₀ values of huTBTI3_2_1 in inhibiting Stat6 phosphorylation induced by IL-13 or IL-4 in human blood monocytes.

Blood donor no. ICso (nM) ICso (nM)

Inhibition of IL- Inhibition of IL-4

13

245 2.65 1.32

229 3.68 0.73

217 0.78

002 1.32

Geometric Mean (95%CI) 2.34 (0.64 to 0.91 (0.41 to 2.04)

8.61)

^* For donor 217, only IL-4 was tested

* ^* For donor 002, only IL-13 was tested

95% Cl= 95% confidence interval

Example 3: Effect of huTBTI3_2_1 on IL-4- or IL-13-induced IL-6 release and eotaxin release from human IPF pulmonary fibroblasts

Human lung fibroblast of idiopathic pulmonary fibrosis (IPF) patient, designation LL97A (AIMy), item number CCL-191 , F-12K Medium (Kaighn's Modification of Ham's F-12 Medium) and Fetal Bovine Serum (FBS) were from the American Type Culture Collection (ATCC, Manassas, VA). Albumin from bovine serum (BSA) was from Sigma- Aldrich (St. Louis, MO). Recombinant human IL-13 (rhlL-13) was from PeproTech (Rocky Hill, NJ); Recombinant human IL-4 (rhlL-4) was from R&D

SYSTEMS (Minneapolis, MN). DuoSet ELISA Development System for human CCL1 1 /Eotaxin and IL-6 were both from R&D SYSTEMS.

LL97A cells at passage 7 were plated on a 96 well cell culture plate at 20,000 cells per well in F-12K Medium with 15% FBS and incubated at 37°C, 5% CO ₂ in a humidified incubator for 24 hours. The medium was then replaced with F-12K

Medium with 0.1 % BSA and the plate was incubated overnight at 37°C, 5% CO2 in a humidified incubator for serum starvation. Cells were then treated overnight at 37°C, 5% CO2 in a humidified incubator with a 3-fold serially diluted, 8 concentration points of huTBTI3_2_1 with a combination of 15ng/ml (1 .2nM) rhlL-13 plus 5ng/ml (0.36nM) rhlL-4 in a total volume of 200μΙ per well. Each treatment was in triplicate. 150μΙ per well of the cell culture supernatant was then taken and diluted into 300μΙ F-12K Medium with 0.1 % BSA (3-fold dilution) for eotaxin and IL-6 ELISA.

The ELISAs were carried out according to the instructions of DuoSet ELISA

Development System for human CCL1 1/Eotaxin and IL-6 of R&D SYSTEMS. The ELISA plates were read in a SPECTRAMAX340PC plate reader (Molecular Devices) for optical density (OD) at 450nm and 540nm. OD values at 540nm were subtracted from OD at 450nm before calculation.

CCL1 1 (eotaxin) and IL-6 levels in supernatants were derived with 4-parameters standard curve in SOFTmax. Sample average without rhlL-13/rhlL-4 stimulation (basal level) was subtracted from each sample and each sample was then compared with sample average of rhlL-13/rhlL-4 stimulation without huTBTI3_2_1 (set as 100% positive) for % positive control. Error bars represent standard error of mean of triplicate biological samples (cell treatment). huTBTI3_2_1 suppressed IL-4/IL-13- stimulated IL-6 release with an IC50=7.8nM and suppressed IL-4/IL-13-stimulated eotaxin release with an IC50=3.8nM (Figure 2).

Example 4: Effect of huTBTI3_2_1 on IL-4- or IL-13-induced LOX expression in IPF pulmonary fibroblasts

To assess the effects of huTBTI3_2_1 on IL-4 and IL-13 stimulated expression of profibrotic enzymes, mRNA levels of lysyl oxidase (LOX) was measured in a similar experiment as shown in Example 3. LOX gene expression was determined by Taqman and was normalized to the housekeeping gene GAPDH.

Standard Taqman methods were used. Briefly, cells lysates were prepared with the Cells-to-Ct kit (ABI, Catalog No. AM1729). 20X Human GAPDH TaqMan Endogenous Control Primer/Probe Set: Applied Biosystems, Part Number 4310884E, Probe Dye: VIC-TAMRA. 20X human primer probe sets (probes labeled with FAM dye at 5' end and nonflourescent quencher at 3' end) was Human LOX: AOD from Applied Biosystems, Gene Name: lysyl oxidase; Assay ID: Hs00184700_m1 . Reverse

Transcription (RT) was performed on a PELTIER THERMAL CYCLER with 4 block assembly, Model PTC 225, from MJ RESEARCH. The Taqman instrument was 7900HT Fast Real-Time PCR System, Applied Biosystems, Part number: 4330966; Serial number: 279001674. 20 ul of cell lysate per sample (or water for no template control) was added to 80ul RT master mix (50ul 2X RT buffer, 5ul 20X RT Enzyme mix, 25ul RNase-free water). RT sequence: reverse transcription at 37degreeC for 60 minutes, RT inactivation at 95degreeC for 5 minutes, hold at 4degreeC forever. For Taqman real-time PCR, PCR cocktail was prepared as follows: 10ul Taqman gene expression master mix (2X), 1 ul Taqman gene expression assay (20x), 1 ul human GAPDH endogenous control (20x), 3 ul water, add 5ul DNA. Taqman cycling conditions: UDG incubation hold was 1 rep at 50degreeC for 2 minutes, enzyme activation was 1 rep at 95degreeC for 10 minutes, and PCR cycle was 40 reps at 95degreeC for 15seconds followed by 60degreeC for 1 minute.

LOX activity results in crosslinking of extracellular collagen and elastin, resulting in stabilization of the extracellular matrix, and its upregulation has been implicated in experimental pulmonary fibrosis (Rodriguez, C. et al., Drug News Perspect. 21 :218- 224, 2008).

IL-4 and IL-13 induced LOX gene expression, and this expression was inhibited by huTBTI3_2_1 in a dose-dependent manner, with an IC50 of 3 - 6 nM (Figure 4). This effect has been observed in pulmonary fibroblasts from at least 3 IPF patients. IL-4 and IL-13 failed to induce genes for fibronectin and insulin-grwoth factors (IGF; data not shown). This data demonstrate pulmonary fibroblasts from IPF subjects express functional IL-4/IL-13 receptors whose activation by IL-4 and IL-13 results in direct and indirect profibrotic effects. The activation of the profibrotic effects of pulmonary fibroblasts from IPF patients with the cytokines IL-4 and IL-13 is inhibited by huTBTI3_2_1 .

Example 5: Effect of huTBTI3_2_1 against allergen-induced acute asthma in cynomolgus monkeys

Since huTBTI3_2_1 does not bind to rodent IL-4 or IL-13, we were not able to test the molecule for protective effects in rodent models of lung fibrosis. Although

huTBTI3_2_1 does bind to cynomolgus monkey IL-4 and IL-13, there are no models of lung fibrosis available in this species. Therefore, to test the ability of huTBTI3_2_1 to inhibit effects of IL-4 and IL-13 in the pulmonary compartment, we investigated its protective effects in a model of acute asthma in a non-human primate species (cynomolgus monkeys). The study used male cynomolgus monkeys (Macaca fascicularis) that are naturally sensitized to Ascaris suum allergens.

To induce airway hyperresponsiveness and airways inflammation, monkeys were challenged with inhaled Ascaris suum extract. Six days before antigen challenge, monkeys received huTBTI3_2_1 (2.5 mg/kg IV), or the same dose of a comparator antibody (anti-IL-13, IMA638) or a control antibody (control antibody does not bind IL- 4 or IL-13).

Bronchoconstrictor responses (increases in lung resistance) to ascending doses of inhaled methacholine were measured using a Ml ² respiratory analyzer.

Measurements were made at least 24 hours before challenge, and again 24 hours after challenge. Airway responsiveness was calculated as the provocation

concentration of methacholine required to cause a 100% increase in lung resistance (PCioo)- Immediately after measurement of airway responsiveness, bronchoalveolar lavage was performed to allow counts of total leukocytes and eosinophils in the airways. Cell counts were expressed as cell numbers per ml of lavage fluid. The differences ( ) in methacholine PC100 values and airway cell numbers before and after antigen challenge were calculated.

Blood samples were collected 24 hours before antigen challenge, and again 7 days after challenge, to allow assay of total immunoglobulin E (IgE) titers. The percent change in IgE titer was calculated.

Antigen challenge caused airway hyperresponsiveness (i.e. a decreased

methacholine PC100 (Figure 4) and an accumulation of total leukocytes and eosinophils in the airways (Figure 5 and 6). When compared with control antibody, prophylactic treatment with either huTBTI3_2_1 (2.5 mg/kg) or IMA638 (2.5 mg/kg) significantly suppressed the development of airway hyperresponsiveness. IMA638, but not huTBTI3_2_1 , significantly reduced the antigen-induced accumulation of total leukocytes in the airways (Figure 5 and 6). huTBTI3_2_1 or IMA638 had no significant effects on the accumulation of eosinophils. huTBTI3_2_1 , but not IMA638, significantly reduced the IgE titer (Figure 7).

Example 6: Effects of huTBTI3_2_1 against TF-1 cell proliferation induced by recombinant human and cynomologus monkey IL-4 and IL-13 in vitro

As a further study of the ability of huTBTI3_2_1 to inhibit IL-4 and IL-13-induced cell activation, the IC ₅ o values for inhibition of TF-1 cell (a human erythrocyte line) proliferation induced by recombinant human IL-4 (hlL-4) and IL-13 (hlL-13) was determined. IL-4- or IL-13-induced TF-1 cell proliferation is commonly used in the literature as an assay for the bioactivities of these cytokines.

TF-1 cells were incubated for 72 hours with huTBTI3_2_1 at a range of

concentrations together with either hlL-4 (5 ng/ml), hlL-13 (15 ng/ml), clL-4 (5 ng/ml) or clL-13 (30 ng/ml). 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide was added for the final 3 hours as a marker of cell proliferation. Optical density values at 490nm were then recorded. huTBTI3_2_1 markedly inhibited hlL-4, clL-4, hlL-13 and clL-13-induced TF-1 cell proliferation in a concentration-dependent manner and with comparable potencies. The geometric mean IC ₅ o values were 2.03nM and 0.53nM respectively against hlL-4 and clL-4-induced proliferation, and 3.02nM and 0.45nM respectively against hlL-13 and clL-13-induced proliferation are shown in Table 4.

Table 4 - Inhibitory effects of huTBTI3_2_1 against TF-1 cell proliferation induced by recombinant human and cynomolgus monkey IL-4 and IL-13 nM

Inhibition of human IL-4 2.03

Inhibition of human IL-13 3.02

Inhibition of cynomolgus 0.53

IL-4

Inhibition of cynomolgus 0.45

IL-13 Mean IC ₅₀ ,

nM

IC ₅ 0 = Concentration of SAR156597 that

inhibits proliferation by 50%.

n=3 (experimental triplicates).

The results of this study demonstrate that huTBTI3_2_1 neutralizes the biological activities of IL-4 and IL-13 as shown by the decreased cell proliferation of TF-1 cells following stimulation by these cytokines. Hence, targeting these cytokines with huTBTI3_2_1 offers a therapeutic approach that may interrupt the fibrotic process in patients with IPF.

Example 7: Effects of SAR156597 on IL-4 and IL-13 mediated TGF release

IL-4 and IL-13 have been shown to stimulate TGF release from human pulmonary epithelial cells. We determined the effect of SAR156597 on release of this profibrotic cytokine from human small airway epithelial cells (SAEC) and human bronchial epithelieal cells (NHBE). SAEC were plated on 12 well plates at 50,000 cells per well in small airway epithelial culture medium (Lonza) and cultured for 3 days. NHBE cells were cultured at 75,000 cells per well in 12 wells plates in BMEM (Lonza) for 3 days. Cells were starved with basal medium containing 5 g/ml insulin and 5 g/ml transferrin overnight and then treated with a combination of 15 ng/ml (1 .2 nM) rhlL- 13 plus 5 ng/ml (0.36 nM) rhlL-4 in the presence of a range of concentrations of SAR156597. TGF 2 in cell supernatants was determined by ELISA (E-biosciences, cat#BMS254). SAR156597 inhibited IL-4 and IL-3 stimulated TGF 2 release from NHBE and SAEC cells in a dose-dependent manner (Figure 8).

Example 8: Pharmacokinetic study after repeated intravenous 5 minutes infusions of 2.5 mg/kg of humanized bispecific anti-IL-4/IL-13 (huTBTI3_2_1) monoclonal antibody to Cynomolgus Monkeys

In this study the pharmacokinetic properties of huTBTI3_2_1 , a humanized bispecific monoclonal antibody (BsAb) to IL-4/IL-13, was measured after repeat dose administration. The goal was to demonstrate that there was an accumulation of huTBTI3_2_1 over time and to monitor the animal production of anti-drug antibodies.

Male Macaca fascicularis (6-8kg) were obtained from Charles River, Houston, Tx. Route of administration was by i/v perfusion in 5 minutes. Five doses were given serially. Blood samples (1 ml) were taken at the following time points: (first dose) Oh,

0.5h, 2h, 4h, 8h, 24h, 48h, 72h, 96h, 120h, 144h, 168h, 240h; (second, third and fourth dose) Oh, 0.5h, 2h, 24h; (fifth dose) Oh, 0.5h, 2h, 4h, 8h, 24h, 48h, 72h, 96h, 120h, 144h, 168h, 240h, 336h, 504h, 672h, 840h, 1008h (h=hour).

The serum samples were stored at -20°C until analysis. Two separate assays using enhanced electro-chemiluminescence (EECL) assays with Meso Scale

Discovery (MSD) technology were used to determine huTBTI3_2_1 levels in serum (Figure 9). A third assay was developed to evaluate the anti-drug-antibody (ADA),

1. e. anti-bispecific monkey antibodies, response.

The first assay (diagramed in panel A of Figure 9) was designed to detect the total amount of human antibody in the serum by measuring the concentration of human light chain kappa). In this assay, MSD high binding plates were coated overnight with 1 pg/nriL of mouse monoclonal anti-human kappa chain (clone 4G7; Abeam; #ab1936) diluted in PBS. Following an overnight incubation at 4°C with serum samples diluted 1 :1000 and 1 :5000, Sulfo-Tag labeled goat anti-human antibody (MSD; # R32AJ-1 ) at a concentration of 1 pg/nriL was added and detected using a MSD plate Sector Imager 6000.

The second assay (diagramed in panel B of Figure 9) was designed to measure the proportion of bispecific antibody in the serum capable of binding IL-4 and IL-13 (measurement of the amount of functional antibody). In this assay, MSD high binding plates were incubated overnight at 4°C sequentially with 2 pg/nriL of a mouse anti-human IL-4 (clone 4D9; Ancell; #ANC-396), then with 200 ng/mL of recombinant human IL-4 (eBioscience, #34-8049) and finally with monkey sera diluted 1 :1000 and 1 :5000. Bound bispecific antibodies were revealed by sequential incubation with 200 ng/mL of recombinant human IL-13 (eBioscience; #34-8139, then with 200 ng/mL of biotinylated rabbit polyclonal anti-human IL-13 antibody

(eBioscience; #13-7138) and finally with Sulfo-Tag streptavidin (MSD; # R32AA-1 ) at a concentration of 1 g/mL. Thirdly, ADAs were detected with a bridging assay (diagramed in panel C of Figure 8). In brief, sera diluted 1 :10 were incubated overnight at 4°C with a mixture of biotinylated and Sulfo-tagged huTBTI3_2_1 (2 g/mL of each final). Complexes were then trapped in streptavidin coated plates (MSD; #L1 1 SA-1 ) by incubation for 4 hours at room temperature and revealed using a MSD plate Sector Imager 6000.

Standard sample concentrations were prepared in PBS containing 0.5 % BSA as indicated in the following table. For the assay to detect the total amount of huTBTI3_2_1 there was no significant difference whether calibration samples were prepared in PBS containing 0.5 % BSA, 0.1 % monkey plasma or PBS containing 0.5 % BSA only. For the assay to detect the fraction of huTBTI3_2_1 specific to IL-4 and IL-13 there was no significant difference whether calibration samples were prepared in PBS containing 0.5 % BSA, 1 % monkey plasma or PBS containing 0.5 % BSA only. Both calibration curves were weighed by 1/x ² using a linear regression and shown to be linear within all calibration points (R ² >0.98).

Table 5. Standard Sample Concentrations

Sample Concentrations of Standards

Assay Compound ID

Matrix (ng/ml)

Total BsAb huTBTI3_2_1

PBS, 0.5%

Batch 50; 16.7; 5.6; 1 .9; 0.6; 0.2; 0.07

BSA

#LP08059

BsAb specific huTBTI3_2_1

PBS, 0.5%

to IL-4 and IL- Batch 200; 50; 12.5; 3.1 ; 0.8; 0.2; 0.05

BSA

13 #LP08059

In parallel to ADA measurements from sera, a data validation curve was obtained by mixing dilutions of a mock ADA with biotinylated and Sulfo-tagged huTBTI3_2_1 . That antibody was a mouse anti-human lgG4 (Abeam; #ab1950-1 ) and showed the best signal to noise ratio out of several antibodies tested. Table 6. Standard Sample Concentrations for ADA

Concentrations of Standards

Assay Compound ID Sample Matrix

(ng/ml)

ADA PBS, 0.5%

Mock ADA 10000; 2500; 625; 156; 39; 9.7

BSA

The lower limits of quantitation (LLOQ) of huTBTI3_2_1 were 70 ng/mL and 5 ng/mL for total assay and specific assay respectively. The determination of ADA response is not quantitative but qualitative in comparison to the mock ADA response.

The pharmacokinetic parameters were calculated from the arithmetic mean of the serum concentrations/the individual animals following the 5 ^th dose using the program WinNonLin 5.2., non-compartment model 202.

Table 7. Total concentrations of bispecific antibodies (BsAb) in monkey sera following repeated intravenous 5 minutes infusions of 2.5 mg/kg of

huTBTI3_2_1 (batch #LP08059) in PBS. For each time point, values are mean concentrations out of three independent measurements done in triplicates.

Dosing Theoretical Theoretical Concentrations of total huTBTI3_2_ 1

sampling sampling fng/mLl

time (h) time (h)

from 1 st from last Monkey

dose dose #1 SD Monkey #2 SD mean dose 1 0 0 <LLOQ n.c. <LLOQ n.c. n.c.

0.5 0.5 77000 23000 87100 25000 82100

2 2 60000 13300 109000 45900 84500

4 4 74000 20800 81700 29400 77900

8 8 54800 1 1900 64100 12000 59500

24 24 60300 15200 77800 41400 69100

48 48 58700 23800 51700 19400 55200

72 72 41400 10600 38600 7290 40000

96 96 45000 2080 48100 19600 46600

120 120 50700 25600 45800 25800 48300

144 144 53500 32400 53900 39800 53700

168 168 31700 12000 34700 19300 33200

240 240 28200 5170 20800 2270 24500 dose 2 336 0 29700 7420 30500 15500 30100

336.5 0.5 1 14000 27800 125000 9280 1 19500

338 2 120000 20400 121000 12900 120500

360 24 91600 19900 84000 9590 87800 dose 3 504 0 83700 16400 47200 287 65500

504.5 0.5 165000 18700 120000 18800 143000

506 2 206000 13100 173000 15600 189500

528 24 156000 18700 104000 10100 130000 dose 4 672 0 101000 9300 69400 1 1300 85200

672.5 0.5 151000 17600 169000 13000 160000

674 2 186000 29200 202000 3990 194000

696 24 164000 49500 135000 8050 150000 dose 5 840 0 134000 1 1900 91600 361 1 13000

840.5 0.5 212000 8650 206000 6180 209000

842 2 219000 13100 174000 9480 197000

844 4 183000 2480 143000 1 1200 163000

848 8 161000 3310 170000 22000 166000

864 24 218000 8340 205000 3340 212000

888 48 141000 5090 1 14000 5350 128000

912 72 196000 19100 154000 5540 175000

936 96 243000 14800 128000 19300 186000

960 120 97200 14900 159000 5310 128000

984 144 127000 10000 92600 15100 1 10000

1 ,008 168 150000 2040 102000 4600 126000

1 ,080 240 132000 12200 94700 28300 1 14000

1 176 336 101000 19000 67900 13500 84500

1344 504 100000 21300 55400 67500 77700

1512 672 69400 12200 44500 9970 57000

1680 840 61400 19100 31600 4500 46500

1848 1008 51900 14100 22800 4320 37400 n.c. not calculated; LLOQ

Table 8. Concentrations of bispecific antibodies (BsAb) reactive to IL-4 and IL- 13 in monkey sera following repeated intravenous 5 minutes infusions of 2.5 mg/kg of huTBTI3_2_1 (batch #LP08059) in PBS. For each time point, values are mean concentrations out of three independent measurements done in triplicates.

Dosing Theoretical Theoretical Concentrations of functional huTBTI3_ 2_1

sampling sampling [ng/mL]

time (h) time (h)

from 1 st from last

dose dose Monkey #1 SD Monkey #2 SD mean dose 1 0 0 <LLOQ n.c. <LLOQ n.c. n.c.

0.5 0.5 104000 3370 1 15000 3510 1 10000

2 2 80600 1030 152000 5300 1 16000

4 4 100000 2610 1 10000 4830 105000

8 8 70400 1200 85800 3930 78100

24 24 74100 1570 1 16000 4020 95100

48 48 75400 675 73900 126 74700

72 72 52800 57 48600 776 50700

96 96 48900 1300 59500 2120 54200

120 120 71600 2180 63800 802 67700

144 144 76800 2510 77700 725 77300

168 168 45700 883 44800 9690 45300

240 240 34400 183 25700 892 30100 dose 2 336 0 34500 3700 42000 1 1000 38300

336.5 0.5 143000 7860 175000 26500 159000

338 2 143000 4610 172000 31200 158000

360 24 1 15000 14900 1 12000 19500 1 14000 dose 3 504 0 84600 26400 55500 10100 70100

504.5 0.5 176000 7540 158000 67600 167000

506 2 205000 24300 208000 66500 207000 528 24 145000 18700 1 12000 20700 129000 dose 4 672 0 93900 9830 69700 14200 81800

672.5 0.5 151000 645 17900 44900 84500

674 2 187000 3340 219000 46500 203000

696 24 161000 9680 156000 6660 159000 dose 5 840 0 1 18000 5840 94200 3860 106100

840.5 0.5 196000 8620 218000 25300 207000

842 2 21 1000 6900 195000 23200 203000

844 4 184000 6100 161000 17100 173000

848 8 159000 12000 182000 13200 171000

864 24 218000 31900 194000 18800 206000

888 48 128000 9180 1 18000 13900 123000

912 72 149000 1910 156000 n.c. 153000

936 96 157000 53400 145000 n.c. 151000

960 120 93300 6350 172000 27300 133000

984 144 1 17000 1660 98600 1570 108000

1 ,008 168 137000 6860 1 16000 20300 127000

1 ,080 240 1 14000 1410 98000 1 1800 106000

1 176 336 85100 1 1400 64400 13300 74800

1344 504 77700 12300 48800 10100 63300

1512 672 47600 978 37100 8250 42400

1680 840 36400 1600 22800 3130 29600

1848 1008 21900 9550 15400 3460 18700 n.c. not calculated; LLOQ

Table 9. Pharmacokinetic parameters of huTBTI3_2_1 after repeated

intravenous 5 minutes infusions of 2.5 mg/kg of huTBTI3_2_1 (Batch #LP08059) in PBS in monkeys. Parameters were obtained after analysis of the functional BsAb concentration values with WinNonLin 5.2, non-compartment model 202.

Table 10. Anti-drug antibody response to huTBTI3_2_1 after repeated

intravenous 5 minutes infusions of 2.5 mg/kg of huTBTI3_2_1 (Batch #LP08059) in PBS in monkeys.

Dosing Theoretical Theoretical MSD signal from serum samples 1 :10

sampling sampling (arbitrary unit) time (h) time (h)

from 1 st from last

dose dose Monkey #1 SD Monkey #2 SD mean dose 1 0 0 769 71 714 71 742

0.5 0.5 565 68 468 50 516

2 2 559 42 547 14 553

4 4 51 1 39 531 51 521

8 8 477 55 506 45 492

24 24 509 17 497 73 503

48 48 533 93 479 56 506

72 72 689 60 644 55 667

96 96 2000 1 10 1 1 10 24 1560

120 120 4320 77 1030 103 2680

144 144 5550 677 810 1 14 3180

168 168 3030 179 663 86 1850

240 240 1720 15 571 25 1 150 dose 2 336 0 1270 61 610 15 940

336.5 0.5 925 90 595 20 760

338 2 1000 35 604 78 802

360 24 751 17 716 109 734 dose 3 504 0 965 53 945 27 955

504.5 0.5 668 90 716 5 692

506 2 597 63 585 52 591

528 24 500 48 562 54 531 dose 4 672 0 646 52 646 26 646

672.5 0.5 493 33 593 67 543

674 2 573 60 631 28 602

696 24 644 49 508 70 576 dose 5 840 0 672 48 452 23 562

840.5 0.5 563 39 449 45 506

842 2 530 22 463 20 497

844 4 502 61 449 56 476

848 8 525 61 388 16 456

864 24 505 59 440 46 472

888 48 706 126 564 54 635

912 72 616 59 396 50 506

936 96 618 71 467 44 542

960 120 743 1 13 393 71 568

984 144 616 68 402 56 509

1008 168 467 28 402 48 435

1080 240 487 9 430 26 459

1 176 336 503 25 421 12 462

1344 504 570 69 403 39 487

1512 672 667 47 412 10 540

1680 840 583 33 431 21 507

1848 1008 541 109 400 53 470

The serum exposure of the bispecific antibody huTBTI3_2_1 to IL-13/IL-4 was measured in male cynomolgus monkeys to establish repeat dose pharmacokinetic parameters. huTBTI3_2_1 , at a dose of 2.5 mg/kg, was given repeatedly to cynomolgus monkeys via intravenous infusions in a serial sampling paradigm. The antibody shows accumulation from the 1 ^st to the 5 ^th dose. C _max and partial AUC _0- 336h increase from 128,000 ng/mL to 220,000 ng/mL and 18,000,000 ng.h/mL to 42,000,000 ng.h/mL respectively. After the 5 ^th dose there is good exposure to the antibody with AUCo-inf of 81 ,000,000 ng.h/mL (see Figure 10). The antibody shows a serum clearance of 0.000032 L/hr-kg and a volume of distribution of 0.014 L/kg. The terminal elimination half-life is found to be 330 hours.

One monkey of the study shows a transient anti-drug antibody (ADA) response, which peaks on days 5-7. ADA level is back to background level by the day of the second infusion. There is no significant rise of ADA levels thereafter. The other monkey displays no significant levels of ADA at anytime.

No particular clinical sign or weight loss was observed during or after administration.

Example 9: Study design summary for a randomized, double-blind, placebo- controlled study of the safety, tolerability, and pharmacokinetics of ascending single subcutaneous doses of huTBTI3_2_1 in healthy young male subjects

This is the first investigation of huTBTI3_2_1 in humans and involves careful dose escalation in healthy subjects to obtain initial information on the safety, tolerability, and pharmacokinetic (PK) of single subcutaneous (SC) doses. Dose escalation was conducted in cohorts of healthy young male subjects (18 to 45 years of age, body weight between 50.0 and 95kg, body mass index between 18.0 and 30.0 kg/m ² ; certified as healthy by a comprehensive clinical assessment; normal heart rate and blood pressure after 10 minutes resting in supine position: 95 mmHg < systolic blood pressure < 140 mmHg; 45 mmHg < diastolic blood pressure < 90 mmHg;

40 bpm < heart rate < 100 bpm; Normal standard 12-lead ECG after 10 minutes resting in supine position; 120 ms < PR < 220 ms; QRS < 120 ms; QTc < 430 ms; laboratory paramaters within normal range; C-reactive protein should not exceed 3 mg/L (using a high-sensitivity method of measurement); cardiac troponin I must not exceed the upper laboratory norm.) This was a single-center, randomized, double-blind, placebo-controlled, ascending single SC dose study in four sequential cohorts of healthy young male subjects. Each dose cohort/group was designed to consist of 8 subjects (6 receiving huTBTI3_2_1 and 2 receiving placebo). This stepwise, dose escalation design was typical for introduction of a new therapeutic entity into humans.

The observation period of 85 days (-12 weeks) after dosing for treatment- emergent adverse events (TEAEs) and PK analysis was appropriate taking into account a typical elimination half-life for a monoclonal antibody of about 15 days. If ADA or autoimmunity antibodies (rheumatoid factor [RF], antinuclear antibodies

[ANA], or anti-neutrophil cytoplasmic antibodies [ANCA]) measured at 12 weeks after dosing were increased from baseline, then an additional follow-up visit would occur at 6 months after dosing to document resolution or longer-term persistence. If, at the end of dose escalation in four sequential dose cohorts, additional information was needed at doses below the highest administered dose, then a fifth dose cohort of 8 subjects will be dosed and evaluated.

Given the immunomodulatory mechanism of action of huTBTI3_2_1 , several specific laboratory tests related to inflammation were implemented.

C-reactive protein (CRP):

Inflammation is associated with elevations in acute phase proteins such as CRP. Using high sensitivity methodology, the upper limit of normal (ULN) for high sensitivity C-reactive protein (hsCRP) is now often stated to be 3 mg/L for the purpose of assessing cardiovascular risk; however, about a third of healthy subjects in the United States have CRP values between 3 and 10 mg/L, with occasional spurious elevations between 10 and 15 mg/L (Kushner I., et al. Am J Med

2006;1 19(2):166.e17-28; Ridker, PM, et al., Circulation 2003:107(3):391 -7; Pearson TA, et al, Circulation 2003:107(3):499-51 1 ; Ridker PM et al, 2000:342(12):836-43; Unek, IT et al., Clin Med Res. 2010; 8(2)89-95). Using serial sampling from healthy subjects, the critical difference for sequential values significant at P <0.05 (ie, the smallest percentage change unlikely to be due to analytical variability or normal within-subject variability) has been reported to be 1 18% (Macy EM et al, Clin Chem 1997:43(1 ):52-8). C-reactive protein values are typically considered clinically significant at levels above 10 mg/L, and sustained elevations above this level may be cause for concern. During acute inflammatory responses, values exceeding

100 mg/L can be observed (Clin B and OlshakerJS, J. Emerg Med. 1999: 17(6)1019- 25). Elevation in CRP has been consistently reported for conditions of active vasculitis (Konttinen YT et al, Ind J Rheumatol 2007:2(3):100-4Hesselink DA et al., Scand J Rheumatol 2003:32(3)151 -5). For this protocol, hsCRP was used, along with clinical observations, as the primary instrument for detection of drug-related inflammation and possible vasculitis. A sustained elevation in hsCRP above 10 mg/L for at least 72 hours, was viewed as possible early evidence of vasculitis. In general, drug-induced vasculitis is reversible upon discontinuation of treatment, and markers of inflammation such as hsCRP should return to normal or baseline values (Wiik, A, Curr Opin Rheumatol 2008:20(1 )35-9; Calabrese LH and DunaGF, Curr Opin

Rheumatol 1996; 8(1 )34-40). In addition, consecutive elevations above 20 mg/L after drug administration can be viewed as evidence of a possible drug-related proinflammatory stimulus and, after excluding other causes of inflammation such as acute infections, possible reason for cessation of further dosing.

Cardiac troponin I:

Serum cardiac troponin I (cTnl) was monitored to detect myocardial injury caused by potential coronary vasculitis (Kim M and Kim K, Pediatr Cardiol,

1999:20(3): 184-8). Interpretation of cTnl in the study was made in the context of clinical signs, symptoms, ECG and hsCRP, as cTnl elevations may be caused by factors other than myocardial injury (including strenuous exercise) (Wu AH, et al. Clin Chem. 2007;53(12):2086-96 ).

Supplementary tests for vasculitis:

To further characterize inflammation associated with sustained elevations in hsCRP in individual subjects, additional laboratory tests related to vasculitis were performed, including tests for complement (C3, C4, and CH ₅₀ ), cryoglobulin, ANCA (immunofluorescence for perinuclear and cytoplasmic ANCA and confirmatory immunoassays for anti-protease 3 [PR3] and anti-myeloperoxidase), RF, and ANA. Baseline values were established prior to dosing for all subjects; further assay of these supplementary tests for vasculitis were done for individual subjects who showed sustained elevation in hsCRP (>10 mg/L for at least 72 hours), in which case the supplementary tests were performed immediately (as soon as practicable) and at several subsequent visits.

The proposed array of supplementary tests provided insight into the

mechanism of vasculitis, should it occur. ANCA is a new classification criteria (Sunderkotter C and Sindrilaru A. Eur J Dermatol. 2006;16(2):1 14-24; Watts R et al., Ann Rheum Dis. 2007;66(2):222-7;Watts RA et al., Rheumatology (Oxford). 2010 Jul 20: 1 -3). ANCA are classified according to the indirect immunofluorescence (IIF) patterns they produce on normal neutrophils and according to their target antigens (Pollock W et al. J Immunol Methods. 2009;347(1 -2):19-23; De Rosa FG and Agnello V. J Rheumatol. 2009;36(9):1953-5; Clin Sci (Lond). 2005;108(2):101 -12) If myeloperoxidase-ANCA is positive, Churg-Strauss syndrome or microscopic polyarteritis can be suspected. If PR3-ANCA is positive Wegener's granulomatosis is most likely. If ANCA test is negative and cryoglobulin test is positive,

cryoglobulinemic vasculitis should be suspected and its underlying diseases should be ruled out, particularly hepatitis C and B, systemic lupus erythematous (SLE), and Sjogren's syndrome. Serum C3 and C4 are often consumed in cryoglobulinemia, but are usually normal in polyarteritis nodosa as well as ANCA vasculitis. ANCA can be positive in the presence of other diseases including infection, inflammatory bowel disease and other connective tissue disease (eg, rheumatoid arthritis). In these cases, ANCA are positive but are negative for PR3 and myeloperoxidase.

Vascular endothelial activation biomarkers:

The development of vasculitic lesions is associated with activation of endothelial cells and neutrophils (Tesfamariam B and DeFelice AF. Vascul

Pharmacol. 2007;46(4):229-37; Toxicol Appl Pharmacol. 2005;207(2 Suppl):441 -5). Enhanced expression of adhesion molecules such as e-selectin promotes interaction of the endothelium with circulating inflammatory cells. Various endothelial activation markers such as endothelin-1 and thrombomodulin are reportedly elevated during vasculitis. Vascular endothelial growth factor (VEGF) can alter vascular permeability and is elevated in serum from patients with Behget's disease, microscopic

polyangiitis, polyarteritis nodosa, giant cell arteritis, and systemic vasculitis (Cekmen M et al., Int J Dermatol. 2003;42(1 1 ):870-5). If treatment-emergent inflammation (eg, sustained hsCRP elevations) or changes in laboratory values consistent with vasculitis was noted in multiple subjects, then archival serum and plasma samples (collected before and periodically after drug administration) was assayed for various exploratory biomarkers associated with vascular endothelial activation to further characterize the nature of the inflammation.

Lymphocyte subsets:

To assure that specific subtypes of human lymphocytes are not selectively affected by huTBTI3_2_1 , lymphocyte subsets were assessed using flow cytometry. This will include total T cells, T helper cells (CD4), T suppressor cells (CD8), and total B cells (CD19) expressed as absolute numbers and as a percent of total lymphocytes, as well as the CD4/CD8 ratio.

Immunogenicity

Systemic administration of monoclonal antibodies is associated with

generation of ADA which can alter the PK and/or activity of the therapeutic antibodies (Hansel TT et al. Nat Rev Drug Discov. 2010;9(4):325-38). Immunogenicity was assessed using an enzyme-linked immunosorbent assay (ELISA) for anti- huTBTI3_2_1 antibodies; a functional assay for assessment of antibody neutralization of huTBTI3_2_1 may be employed during future studies.

Urinary albumin:

Appearance of protein in the urine is an indication of increased permeability of the renal glomeruli and, during clinical drug trials, evidence of possible renal injury. A standard urine dipstick assay for protein is typically used for this purpose. However, dipstick methodology may not detect the more subtle changes in glomerular function as might occur during early stages of vasculitis. Therefore, a more sensitive assay for urinary albumin was used during initial clinical studies of huTBTI3_2_1 . An early morning spot urine collection was used to monitor potential appearance of

microalbuminuria and reported as the albumin/creatinine ratio to correct for

fluctuations in the extent of urine solute dilution. Post-treatment appearance of microalbuminuria was defined as observation of an albumin/creatinine ratio

>30 pg/mg in 2 of 3 consecutive urine collections, as recommended for the monitoring of patients with diabetes mellitus (American Diabetes Association.

Standards of medical care in diabetes-2009. Diabetes Care. 2009;32 Suppl 1 :S13- 61 ). Since exercise can transiently elevate urinary albumin, vigorous physical exercise must be restricted prior to urine collection (Heathcote KL et al., Clin Invest Med. 2009;32(4):E261 -5). Urinary albumin results obtained within 24 hours of vigorous physical exercise must be excluded from consideration for purposes of defining microalbuminuria. An observation of an albumin/creatinine ratio >300 pg/mg in 2 of 3 consecutive urine collections was assessed as evidence of

macroalbuminuria (American Diabetes Association. Standards of medical care in diabetes-2009. Diabetes Care. 2009;32 Suppl 1 :S13-61 ).

Tolerability at the site of investigational product (IP) injection:

The degree of discomfort and tissue reaction at the site of IP injection was monitored for up to 2 weeks after dosing, including standard qualitative and quantitative assessments for present pain (verbal scale) (Melzack R. The McGill Pain Questionnaire: major properties and scoring methods. Pain 1975; 1 :277-299) and for erythema and swelling/induration/ edema (Guidance for industry: toxicity grading scale for healthy adult and adolescent volunteers enrolled in preventive vaccine clinical trials, US Dept of Health and Human Services, Food and Drug Administration, Center for Biologies Evaluation and Research, September 2007).

The dose escalation steps for TDU1 1325 are provided in Table 1 1 . The dose escalation ratio is 2-fold at each escalation step. This serial increase in dose is typical for initial clinical trials of therapeutic monoclonal antibodies and is supported by careful monitoring of potential safety signals.

Table 11. Sequential subcutaneous doses of huTBTI3_2_1

Total volume Dose in mg/kg

Incremental

Dose cohorts injected assuming body

increase subcutaneously weight of 60 kg

10 mg 0.1 ml_ 0.17 mg/kg

20 mg 0.2 ml_ 0.33 mg/kg 2

40 mg 0.4 ml_ 0.67 mg/kg 2

80 mg 0.8 ml_ 1 .33 mg/kg 2

150mg 1 .5 ml 2.50 mg/kg 1 .9 Total volume Dose in mg/kg

Incremental

Dose cohorts injected assuming body

increase subcutaneously weight of 60 kg

300mg 3.0 ml 5.0 mg/kg 2

Higher doses of huTBTI3_2_1 could be tested depending on the results of the lower doses. Higher doses could include any dose lower than, equal to or higher than a 300mg cohort. Additional dose cohorts contemplated include but are not limited to 175mg, 200 mg, 225 mg, 250mg, 275 mg and 300 mg. Addititonal dose cohorts could also be 300mg, 350 mg, 400mg or higher.

huTBTI3_2_1 or placebo was administered as periumbilical SC injections in a fasted condition in a zone 4 to 10 cm to the right or left of the umbilicus and above the waistline. The dose cohorts in TDU1 1325 were obligatorily initiated as smaller subgroups as a safety precaution. For each dose cohort, 2 subjects were dosed on the first day. The remaining subjects in the cohort were dosed no sooner than 2 days (-48 hours) later, with no more than 2 subjects dosed each day.

A decision to proceed from dose "n" to the next higher "n+1 " dose was made jointly by the Sponsor and the Investigator based on a preliminary safety report provided by the Investigator which includes blinded safety data for at least 21 days postdose (Day 22) of at least 6 out of 8 subjects of dose level cohort "n". Thus, taking into account the staggered dosing within a cohort, a new dose cohort was initiated about every 4 weeks. The relevant data for this decision should be at least: adverse events, hematology, lymphocyte subsets, coagulation, urinalysis, serum biochemistry (including hsCRP and cTnl), ECG, blood pressure, heart rate, and body temperature. The available PK data was also reviewed during the study progression.

In addition to the classic assessment of serious adverse events and the occurrence/severity of other adverse events by the Sponsor and the Investigator, after exploring potential confounding factors, the following criteria were considered as guidance for the decision to stop dosing:

• More than 1 adverse event (same verbatim) of severe intensity for which the relationship to treatment cannot be reasonably excluded. The definition of "severe" intensity for an adverse event is that it prevents daily activities and requires symptomatic treatment; • QTc >500 ms;

• hsCRP >20 mg/L sustained for 2 consecutive blood collections >24 hours apart

Note: If hsCRP is >20 mg/L at a scheduled collection timepoint, an additional blood sample should be collected 24 hours later (or as soon as possible thereafter) for retesting.

huTBTI3_2_1 in lyophilized form for preparation of SC dose solution with each vial containing 185 mg of huTBTI3_2_1 plus excipients and stored between 2°C and 8°C (36°F and 46°F). To be reconstituted on the morning of dosing (no more than 1 hour prior to SC injection) with 1 .7 mL sterile, nonpyrogenic distilled water at room temperature. The concentrations of the constituents in solution after reconstitution for injection were: 100 mg/mL of huTBTI3_2_l in 6.3 mmol/L monobasic sodium phosphate, 3.7 mmol/L tromethamine, 5% (weight/volume) sucrose, 3% (w/V) proline, and 0.2% (w/V) polysorbate 80 with a final pH of 7.0. For placebo, each vial will contain 2 mL of liquid consisting of the same excipients at the same concentrations as for the reconstituted huTBTI3 2 1 formulation.

Table 12 - Planned huTBTI3 2 1 subcutaneous administration

Group Dose (mg) Total volume injected

1 10 0.1 mL

2 20 0.2 mL

3 40 0.4 mL

4 80 0.8 mL

5 150 1 .5 mL

6 300 3.0 mL (two 1 .5 mL injections)

A predose fasting period commenced at least 10 hours prior to dosing and continued for 2 hours after dosing.

The safety and tolerability investigations at baseline and during the study consisted of:

• Physical examination (includes at least: heart and respiratory auscultation; peripheral arterial pulse in both arms and both legs; pupil, knee, Achilles, and plantar reflexes; peripheral lymph nodes and abdomen examination; inspection of skin, hands and feet);

• Body weight (kg);

• Posteroanterior chest x-ray (at screening only unless clinically indicated

postdose)

• Body temperature (either oral or tympanic but consistently the same method throughout the study for all subjects);

• Heart rate and systolic and diastolic blood pressure measured after 10 minutes in supine resting position and after 3 minutes in standing position);

• Laboratory tests (all blood samples collected in the morning under fasted

conditions, ie, only water for at least 10 hours prior, unless otherwise specified):

- Hematology: red blood cell count (RBC), hematocrit (Hct), hemoglobin (Hb), white blood cell count (WBC) with differential (neutrophils, eosinophils, basophils, monocytes and lymphocytes), platelets;

- Coagulation: prothrombin time (PT), international normalized ratio (INR), fibrinogen, and activated partial thromboplastin time (aPTT);

- Serum biochemistry:

Electrolytes: sodium, potassium, chloride, calcium;

Liver function: AST, ALT, alkaline phosphatase, gamma-glutamyl transferase (GGT), total and conjugated bilirubin;

Renal function: urea, creatinine;

Metabolism: glucose, albumin, total protein, total cholesterol, triglycerides; Potential muscle toxicity: creatine kinase (CK); Potential cardiac toxicity: cTnl;

Inflammation biomarker: high-sensitivity CRP (hsCRP); - Lymphocyte subsets:

Total T cells (CD3), T helper cells (CD4), T suppressor cells (CD8), and total B cells (CD19) by flow cytometry, expressed as absolute numbers and as percent of total lymphocytes, as well as the CD4/CD8 ratio.

- Immunogenicity: anti-huTBTI3_2_1 antibodies;

- Supplementary tests for vasculitis (at baseline and, then postdose only for subjects exhibiting hsCRP >10 mg/L for >72 hours):

Complement assays: C3, C4, CH ₅ o;

Cryoglobulin;

Rheumatoid factor (RF);

Anti-nuclear autoantibodies (ANA): HEp2 IIF (titer and pattern);

Anti-neutrophil cytoplasmic autoantibodies (ANCA): immunofluorescence for perinuclear and cytoplasmic ANCA and confirmatory immunoassays for anti- protease 3 and anti-myeloperoxidase.

• Serology tests: HBsAg, hepatitis B core antibody, anti-HCV antibodies,

anti-HIV1 and anti-HIV2 antibodies;

• Archival blood samples: Serum and plasma samples were prepared and

stored for future assay of laboratory parameters needed to support safety assessment. In particular, an observation of sustained inflammation

(eg, hsCRP >10 mg/L for at least 72 hours) or appearance of treatment- emergent markers of vasculitis in multiple subjects may lead to assay of exploratory biomarkers of vascular endothelial activation.

For serum, a 10 mL blood sample was collected into a dry, red topped tube and, within 15 minutes of collection, centrifuged at approximately 1500 g for 10 minutes at 4°C; the serum was then be transferred in roughly equal aliquots (using a plastic transfer pipet) into 3 storage tubes, which was immediately capped and frozen in an upright position at -20°C or colder; For plasma, a 10 mL ethylenediaminetetra-acetic acid (EDTA) blood sample was collected into a purple-top tube and, within 15 minutes of collection, centrifuged at approximately 1500 g for 10 minutes at 4°C; the plasma was then be transferred in roughly equal aliquots (using a plastic transfer pipet) into 3 storage tubes, which was immediately capped and frozen in an upright position at -20°C or colder;

• Urinalysis:

- A midstream urine specimen was collected and subjected to the following analyses.

- A reagent strip dipstick analysis for detection of protein, glucose, blood (heme), leucocytes, ketone bodies, and pH. A positive glucose result should be confirmed with an alternative methodology for glucose according to the local clinical laboratory standard operating procedures. Upon initial detection of protein, glucose, or blood in a subject's urine, an additional urine specimen should be collected and subjected to urinalysis for confirmation.

- The urine sediment should be examined for, at a minimum, the following formed elements: red blood cells, dysmorphic red blood cells, white blood cells, renal epithelial cells, casts (hyaline, RBC, WBC, granular, waxy, fatty, renal cell), bacteria, yeast and trichomonas. Abundance of each of these elements should be scored using standard laboratory terminology and units in use at the local laboratory (eg, number of cells per high power field, few, abundant). Any additional unusual observations should be noted on reports.

- Urine microalbumin: quantitative assay of albumin and creatinine and

calculation of albumin/creatinine ratio ( g/mg).

• Urine drug screen: amphetamines/methamphetamines, barbiturates,

benzodiazepines, cannabinoids, cocaine, opiates;

• Alcohol breath or blood test; • Adverse events, spontaneously reported by the subject or observed by the Investigator, were monitored for definition of adverse events and related responses);

• Standard 12-lead ECGs.

When vital signs, ECG, and blood samples were scheduled at the same time as an Investigational product administration and/or a meal, they were done prior to IP intake and/or meal. Whenever measurements of vital signs, ECG, and blood sampling for PK or safety coincided, the following order was respected: ECG, vital signs, PK samples, and safety samples.

Twelve-lead ECGs were recorded after at least 10 minutes in supine position using an electrocardiographic device. The electrodes were positioned at the same place for each ECG recording throughout the study (attachment sites of the leads will be marked with an indelible pen).

Each ECG consisted of a 10 second recording of the 12 leads simultaneously, leading to:

- One single 12-lead ECG (25 mm/s, 10 mm/mV) print-out with heart rate, PR, QRS, QT, QTc automatic correction evaluation, including date, time, initials and number of the subject, signature of the research physician, and at least 3 complexes for each lead. The Investigator medical opinion and automatic values were recorded in the eCRF. This printout was retained at the site level. As an exception, recordings were obtained in triplicate on Day 1 pre-dose.

The skin around the periumbilical area was examined for potential reactions to the SC injection. The maximum diameter of erythema and swelling (including induration and/or edema) was measured separately in millimeters and recorded. Erythema and swelling was graded separately as follows in a manner similar to the FDA guidance on assessment of vaccines. If there is no treatment-emergent change in a parameter at the time of observation, a value of 0 was recorded. Table 13 - Toxicity grading scale for local tolerability

Potentially Life

Mild Moderate Severe Threatening

Erythema/Redness 2.5 - 5.0 cm 5.1 - 10.0 cm >10.0 cm Necrosis or exfoliative dermatitis

Swelling/Induration/ 2.5 - 5.0 cm 5.1 - 10.0 cm >10.0 cm or Necrosis Edema and does not or interferes prevents

interfere with with activity daily activity

activity

In addition, the degree of itching and appearance of papules, pustules, and vesiculation was each scored using the following grading scale:

0 = None; 1 = Hardly perceptible; 2 = Mild; 3 = Moderate; 4 = Severe

Skin reactions of moderate intensity or worse were reported as adverse events. The presence or the absence of the following symptoms or superficial observations were recorded without grading: erosion, dryness, scaling, cracking, scabbing, and glazing.

In addition, the present pain intensity was recorded using the following verbal numeric rating scale (self assessment by the study subject) based on a subset of the McGill Pain Questionnaire. A subject-assessed pain score of >3 will be reported as an adverse event.

0 = No Pain; 1 = Mild; 2 = Discomforting; 3 = Distressing; 4 = Horrible; 5 = Excruciating

Pharmacokinetics

All blood collections for huTBTI3_2_1 PK analysis were scheduled to occur within ±15% of the sampling times. The number of plasma samples by subject and the total number of samples for the study are given in Table 14. Table 14. TDU part - number of plasma samples collected for huTBTI3_2_1 assays

Total by subject 17

Total for study (32 subjects) ^{3 544}

a Four (4) dose groups of 8 subjects; not including optional 5th dose group

Table15. Summary of sample handling procedures for huTBTI3_2_1 assays

Blood Sample Volume 4 ml_

Anticoagulant Sodium citrate

Plasma Aliquot Split Yes

Plasma Storage Conditions <-20°C

Plasma Shipment Conditions On dry ice

An ELISA was used for the quantification of huTBTI3_2_1 in human plasma. Biotinylated IL-4 coated on a streptavidin plate is used to capture huTBTI3_2_1 , which is then detected by SulfoTag-IL-13. This format, which uses

electrochemiluminescence detection, is able to detect huTBTI3_2_1 that retains at least 1 unoccupied binding site for IL-4 and 1 unoccupied binding site for IL-13.

Since huTBTI3_2_1 plasma concentrations were typically present in large molar excess compared to concentrations of IL-4 and IL-13, the assay reflected total concentrations of huTBTI3_2_1 .

The potential interference of ADA with huTBTI3_2_1 measurements were taken into account when assaying clinical samples.

Table 16. Summary of bioanalytical method for huTBTI3_2_1

Analyte huTBTI3_2_1

Matrix Plasma

Analytical Technique ELISA

Lower limit of Quantification 50 ng/mL (to be confirmed at the end of validation) Analyte huTBTI3 2 1

Assay volume 100 μΙ_

Site of Bioanalysis Bertin Pharma (CRO) Saclay, France

Method Reference DOH0850 (validation on going)

ELISA = enzyme-linked immunosorbent assay

For the analysis of potential anti-huTBTI3_2_1 antibodies (ADA) in human plasma, a bridging qualitative ELISA using electrochemiluminescence detection was used. A cut-off that should provide a 5% false positive rate, above which a plasma sample was considered as potentially positive for anti-huTBTI3_2_1 antibody, was used in each screening assay.

Positive samples in screening assay were then tested in a confirmatory assay (competition with huTBTI3_2_1 ) in order to demonstrate the presence of antibodies and eliminate false positive results generated from the initial screening assay.

Interference of huTBTI3_2_1 in the ADA assay was be documented so that the highest drug concentration that did not affect the limit of ADA detection was known and the interpretation of immunogenicity taken into account this parameter.

Table 17. Summary of bioanalytical method for anti-huTBTI3_2_1 antibodies

Analyte Anti-huTBTI3_2_1 antibodies

Matrix Plasma

Analytical Technique ELISA (screening and confirmatory assays)

Sensitivity <100 ng/mL

Assay volume 100 M L

Site of Bioanalysis Montpellier, France

Method Reference DOH0851

ELISA = enzyme-linked immunosorbent assay

Plasma concentrations were used to determine the PK parameters of huTBTI3_2_1 listed in Table 18 using standard non-compartmental techniques. Table 18 - List of pharmacokinetic parameters for plasma huTBTI3_2_1 and definitions

Parameters Definition/Calculation

C _n Maximum plasma concentration observed tm First time to reach C,

Area under the plasma concentration versus time curve calculated

AUC last

using the trapezoidal method from time zero to the real time

Area under the plasma concentration versus time curve extrapolated to ng equation:

Time corresponding to the last concentration above the limit of

Llast

quantification, Ci _as t

Terminal half-life associated with the terminal slope (λζ) determined according to the following equation:

0.693

Ί/2Ζ - /2z

where λζ is the slope of the regression line of the terminal phase of the plasma concentration versus time curve, in semi-logarithmic scale. Half-life is calculated by taking the regression of at least 3 points.

Apparent total body clearance of a drug from the plasma calculated using the following equation:

CL/F

CL/F : Dose

AUC

Apparent volume of distribution at steady state after non-intravenous

Vss/F administration

Vss/F=CL/F *MRT

Table 19. Sampled blood volume

Type Volume per Number of Total sample samples

Serology tests 5 ml_ 1 5 mL

Hematology 3 ml_ 13a 39 mL

Serum biochemistry with hsCRP 10 mL 13a 130 mL and cTnl

Coagulation (PT, INR, fibrinogen, 3 mL 13a 39 mL and aPTT)

Lymphocyte subsets 4 mL 6 24 mL

Pharmacogenetic for stored DNA 6 mL 1 6 mL

Pharmacokinetic huTBTI3_2_1 4 mL 17 68 mL huTBTI3_2_1 immunogenicity 4 mL 5 20 mL (ADA)

Archival sample - serum 10 mL 5 50 mL

Archival sample - EDTA plasma 10 mL 5 50 mL

Supplementary vasculitis tests 10 mL Qb 60 mL

(frozen serum)

Cryoglobulin (room temperature 10 mL Qb 60 mL serum)

TOTAL 551 mL a Includes optional 6-month visit

b Includes 5 additional samples (beyond baseline on Day -1 ) to be collected only if elevations in hsCRP >10 mg/L for >72 hours are observed.

Abbreviations: ADA = anti-drug antibodies; aPTT = activated partial thromboplastin time; cTnl = cardiac troponin I; EDTA = ethylenediaminetetra-acetic acid; hsCRP = high sensitivity C-reactive protein; INR = international normalized ratio;

PT = prothrombin time

For Cmax, AUCiast, AUC, dose proportionality was assessed using the empirical power model (PK parameter = a xdose ¹³ ), along with an "estimation" interpretation, according to the recommendations of Gough et al Pharmacokinetics UK Joint Working Group Drug Infor J 1995:29:1039-1048.

The power model will be fit on the log-transformed scale: log(parameter) = log(a) + xlog(dose) + Error. Model lack-of-fit was assessed by residual plots, and by an F-test of the residual mean square versus the pure error residual mean square. If the model fit is adequate, estimates with 90% confidence intervals for β were obtained, and further used to obtain estimates and 90% confidence intervals for the PK parameter increase associated with an r-fold (r = 2 and r = high dose/low dose) increase in dose, by exponentiating r to the powers of the β estimate ("b") and confidence limits: r b ± t x SE(b)

If there is evidence of model lack-of-fit, then attempts were made to fit the model over a reduced dose range (eg, exclude 1 extreme dose level). Otherwise, a fixed effect model was used, with fixed term for dose, using logarithms of the relevant PK parameters. Estimates with 90% confidence intervals for the parameter increases associated with pairwise dose increases were obtained by first computing estimates with confidence intervals for differences between pairwise dose groups in the fixed effects model framework, and then converting to ratios using the antilog

transformation.

For ti 2z, dose effect will be assessed with a linear fixed effect model,

Log(ti/ _2z ) = Dose + Error

Point estimate and 90% confidence interval for the geometric mean of ti _2z were provided pooled across dose levels and separately for each dose group.

The distribution of t _max values was represented by histogram plots for each dose level.

Definition of Adverse Event and Serious Adverse Event

An adverse event is any untoward medical occurrence in a subject

administered a pharmaceutical product and which does not necessarily have to have a causal relationship with this treatment.

A serious adverse event is any untoward medical occurrence that at any dose:

• Results in death or

• Is life-threatening, or - Note: The term "life-threatening" in the definition of "serious" refers to an event in which the subject was at risk of death at the time of the event; it does not refer to an event which hypothetically might have caused death if it were more severe.

• Requires inpatient hospitalization or prolongation of existing hospitalization, or

• Results in persistent or significant disability/incapacity, or

• Is a congenital anomaly/birth defect, or

• Is a medically important event:

- Medical and scientific judgment should be exercised in deciding whether expedited reporting is appropriate in other situations, such as important medical events that may not be immediately life-threatening or result in death or hospitalization but may jeopardize the subject or may require intervention to prevent 1 of the other outcomes listed in the definition above.

Note: As guidance for determining which conditions are medically important events, the following examples are provided, though not intended to be exhaustive: intensive treatment in an emergency room or at home for allergic bronchospasm; blood dyscrasias such as agranulocytosis, aplastic anemia, bone marrow aplasia, myelodysplasia, pancytopenia; convulsions; alanine aminotransferase (ALT) >3 x upper limit of normal range (ULN) associated with total bilirubin >2 x ULN; asymptomatic ALT increase >10 x ULN; or development of drug dependency or drug abuse.

Adverse events requiring the Sponsor to be informed immediately:

• ALT increase >2 x ULN

• hsCRP >10 mg/L for >72 hours • cardiac troponin I (cTnl) >2 x ULN

If cTn I >2 x ULN is observed, cTnl, creatine kinase (CK) and myocardial B fraction of creatine kinase (CK-MB) values should be serially tracked (at a minimum in an immediate additional blood collection and on the following day), along with additional ECG recordings, until test results return to normal. Consultation of a cardiologist should be considered promptly if elevations in cTnl persist, the CK-MB/CK ratio is elevated, and/or treatment emergent abnormalities in ECG recordings are observed.

• QTc >500 ms

In occurrences of prolongation of QTc automatic measurement >500 ms, confirmed by a manual reading by the Investigator, or a physician delegated by the Investigator, using the Fridericia formula for correcting QT, the subject should be placed under supervision in a specialized setting. Appropriate blood samples will be collected (eg, for cTnl). Subsequent ECG monitoring of the subject should then be performed on a regular and clinically responsible basis until the QTc interval returns to a safe value as determined by the Investigator in agreement with the Sponsor.

• Severe skin reactions local to the site of IP injection

• Symptomatic overdose with IP

- An overdose (accidental or intentional) with the IP is an event suspected by the Investigator or spontaneously notified by the subject (not based on systematic IP vial count) and defined as at least twice of the intended dose.

Laboratory abnormalities include:

• Neutropenia,

- Defined as neutrophil blood count <1500/mm ³ (but <1000/mm ³ in subjects of African descent)

• Thrombocytopenia,

- Defined as platelet count <100 000/mm ³

• Acute renal failure - Rapid increase in serum creatinine over 150 μηηοΙ/L (1 .7 mg/dL)

• Suspicion of rhabdomyolysis

Example 10: Results from the randomized, double-blind, placebo-controlled study of the safety, tolerability, and pharmacokinetics of ascending single subcutaneous doses of SAR1 56597 in healthy young male subjects (TDU11325)

The following Tables, Tables 20 - 35, summarize the data from TDU1 1325 study.

Table 20 : Subject disposition

SAR156597

20 40 150 300

Placebo 10 mg mg mg 80 mg mg mg

Randomized

and treated 12 6 6 6 6 6 6

PGM=PRODOPS/SAR156597/TDU1 1325/CSR/REPORT/PGM/dis_dsover_

OUT=REPORT/OUTPUT/dis_dsover_s_t_i.rtf (08MAR2012 - 15:31 )

Table 21 : Analysis population

SAR156597

Placeb 10 20 40 80 150 300

o mg mg mg mg mg mg All

Safety population 12 6 6 6 6 6 6 48

Pharmacokinetic

population 0 6 6 5 6 6 6 35

Pharmacodynami

c population 12 6 6 6 6 6 6 48

PGM=PRODOPS/SAR156597/TDU1 1325/CSR/REPORT/PGM/dis_popover_a

J.sas OUT=REPORT/OUTPUT/dis_popover_a_t_i.rtf (08MAR2012 - 15:31 ) Table 22. Demographics and subject characteristics at baseline - safety population

SAR156597

Placebo 10 mg 20 mg 40 mg 80 mg 150 mg 300 mg All (N=12) (N=6) (N=6) (N=6) (N=6) (N=6) (N=6) (N=48)

Age (years)

Number 12 48 Mean (SD) 31 .7 (8.7) 29.5 (5.7) 29.0 (7.4) 30.5 (7.3) 33.0 (6.7) 30.0 (7.8) 29.3 (7.4) 30.6 (7.2) Median 30.0 29.5 25.0 33.0 34.5 29.0 27.5 30.0 Min : Max 22 : 44 22 : 39 24 : 42 19 : 37 21 : 41 21 : 41 21 : 40 19 : 44

Sex [n (%)]

Number 12 6 6 6 6 6 48

Male 12 (100%) 6 (100%) 6 (100%) 6 (100%) 6 (100%) 6 (100%) 6 (100%) 48 (100%)

Race [n (%)]

Number 12 48

Caucasian/Whit

e 9 (75.0%) 4 (66.7%) 5 (83.3%) 5 (83.3%) 4 (66.7%) 4 (66.7%) 4 (66.7%) 35 (72.9%)

Black 1 (8.3%) 0 0 0 1 (16.7%) 0 2 (33.3%) 4 (8.3%)

Asian/Oriental 1 (8.3%) 0 0 0 1 (16.7%) 0 0 2 (4.2%) Other 1 (8.3%) 2 (33.3%) 1 (16.7%) 1 (16.7%) 0 2 (33.3%) 0 7 (14.6%)

SAR156597

Placebo 10 mg 20 mg 40 mg 80 mg 150 mg 300 mg All

(N=12) (N=6) (N=6) (N=6) (N=6) (N=6) (N=6) (N=48)

Weight (kg)

Number 12 6 6 6 6 6 6 48

76.23 78.55 71.67 79.85 79.30 77.92 80.32 77.51

Mean (SD) (9.56) (10.50) (8.57) (8.95) (1 1 .33) (8.39) (15.89) (10.22)

Median 76.80 78.80 70.40 82.60 81.50 76.20 83.80 76.80

Min : Max 60.3 : 93.1 67.5 : 88.7 62.2 : 87.0 64.4 : 89.7 59.8 : 94.1 67.6 : 91 .3 53.0 : 95.0 53.0 : 95.0

PGM=PRODOPS/SAR156597/TDU1 1325/CSR/REPORT/PGM/dem_dmsc_s_t.sas OUT=REPORT/OUTPUT/dem_dmsc_s_t_i.rtf (08MAR2012 - 15:32)

Table 23. Overview of adverse event profile: treatment emergent adverse events - safety population

SAR156597

Placebo 10 mg 20 mg 40 mg 80 mg 150 mg 300 mg n(%) (N=12) (N=6) (N=6) (N=6) (N=6) (N=6) (N=6)

1 1 3 4 4 4 5 3

Subjects with any TEAE (91 .7%) (50.0%) (66.7%) (66.7%) (66.7%) (83.3%) (50.0%)

Subjects with any severe 1

TEAE (8.3%) 0 0 0 0 0 0

Subjects with any treatment 1

emergent SAE 0 0 0 0 0 (16.7%) 0

Subjects with any TEAE na leading to permanent

treatment discontinuation na na na na na na

EAE: Treatment emergent adverse event, SAE: Serious adverse event

na = not applicable

N = Number of subjects treated within each group, n (%) = number and % of subjects with at least one TEAE in each category

Note: An adverse event is considered as treatment emergent if it occurred from the time of the first investigational product (IP) administration up to the end of study visit (included).

PGM=PRODOPS/SAR156597/TDU1 1325/CSR/REPORT/PGM/ae_aeover_s_t.sas

OUT=REPORT/OUTPUT/ae_aeover_s_t_i.rtf (08MAR2012 - 15:31 )

Table 24. Number (%) of subjects with TEAE(s) by Primary SOC and PT - safety population

SAR156597

Primary system organ class Placebo 10 mg 20 mg 40 mg 80 mg 150 mg 300 mg Preferred term [n (%)] (N=12) (N=6) (N=6) (N=6) (N=6) (N=6) (N=6)

Any class 1 1 (91.7%) 3 (50.0%) 4 (66.7%) 4 (66.7%) 4 (66.7%) 5 (83.3%) 3 (50.0%)

Infections and infestations 2 (16.7%) 2 (33.3%) 1 (16.7%) 1 (16.7%) 2 (33.3%) 1 (16.7%) 2 (33.3%)

Infectious mononucleosis 0 0 0 0 0 0 1 (16.7%)

Upper respiratory tract infection 2 (16.7%) 1 (16.7%) 0 1 (16.7%) 0 0 1 (16.7%)

Bronchitis 0 0 0 0 0 1 (16.7%) 0

Conjunctivitis infective 0 0 0 0 1 (16.7%) 0 0

Gastroenteritis 0 1 (16.7%) 0 0 0 0 0

Impetigo 0 0 0 0 1 (16.7%) 0 0

Pharyngitis 0 1 (16.7%) 1 (16.7%) 0 0 0 0

Blood and lymphatic system

disorders 1 (16.7%) 1 (16.7%)

Neutropenia 0 1 (16.7%)

Eosinophilia 1 (16.7%) 0

Metabolism and nutrition disorders 1 (16.7%)

Decreased appetite 1 (16.7%)

Nervous system disorders 4 (33.3%) 1 (16.7%) 0 2 (33.3%) 2 (33.3%) 2 (33.3%)

Amnesia 0 0 0 1 (16.7%) 0 0

Dizziness 1 (8.3%) 0 0 0 0 1 (16.7%)

Headache 3 (25.0%) 1 (16.7%) 0 2 (33.3%) 2 (33.3%) 2 (33.3%)

Muscle contractions involuntary 1 (8.3%) 0 0 0 0 0

Presyncope 1 (8.3%) 0 0 0 0 0

Sinus headache 0 0 0 1 (16.7%) 0 0

SAR156597

Primary system organ class Placebo 10 mg 20 mg 40 mg 80 mg 150 mg 300 mg

Preferred term [n (%)] (N=12) (N=6) (N=6) (N=6) (N=6) (N=6) (N=6)

Cardiac disorders 1 (16.7%)

Palpitations 1 (16.7%)

Vascular disorders 1 (16.7%) 1 (16.7%)

Deep vein thrombosis 0 1 (16.7%)

Orthostatic hypotension 1 (16.7%) 0

Respiratory, thoracic and

mediastinal disorders 2 (16.7%) 2 (33.3%) 1 (16.7%) 1 (16.7%) 2 (33.3%) 1 (16.7%)

Cough 1 (8.3%) 0 0 0 0 1 (16.7%)

Dyspnoea 1 (8.3%) 1 (16.7%) 0 0 0 0

Nasal congestion 0 1 (16.7%) 1 (16.7%) 1 (16.7%) 1 (16.7%) 0

Oropharyngeal pain 0 0 0 0 1 (16.7%) 0

Pneumothorax 0 0 0 0 1 (16.7%) 0

Gastrointestinal disorders 3 (25.0%) 2 (33.3%) 3 (50.0%) 1 (16.7%) Constipation 0 0 1 (16.7%) 1 (16.7%) Diarrhoea 1 (8.3%) 0 0 1 (16.7%) Abdominal pain 0 1 (16.7%) 0 0 Dyspepsia 1 (8.3%) 0 0 0 Inguinal hernia 1 (8.3%) 0 0 0 Nausea 1 (8.3%) 0 2 (33.3%) 0 Toothache 0 1 (16.7%) 0 0 Vomiting 0 0 1 (16.7%) 0

Skin and subcutaneous tissue

disorders 2 (16.7%) 1 (16.7%) 1 (16.7%)

Dermatitis contact 2 (16.7%) 1 (16.7%) 1 (16.7%)

SAR156597

Primary system organ class Placebo 10 mg 20 mg 40 mg 80 mg 150 mg 300 mg

Preferred term [n (%)] (N=12) (N=6) (N=6) (N=6) (N=6) (N=6) (N=6)

Papule 0 0 0 0 0 1 (16.7%) 0

Musculoskeletal and connective 2 1 tissue disorders (16.7%) 0 2 (33.3%) 1 (16.7%) 1 (16.7%) 0 (16.7%)

1

Back pain 0 0 1 (16.7%) 1 (16.7%) 0 0 (16.7%)

1

Musculoskeletal stiffness 0 0 0 0 0 0 (16.7%)

Myalgia 1 (8.3%) 0 1 (16.7%) 0 1 (16.7%) 0 0

Myositis 1 (8.3%) 0 0 0 0 0 0

Neck pain 0 0 1 (16.7%) 1 (16.7%) 0 0 0

Renal and urinary disorders 0 0 1 (16.7%) 0 0 0 0 Haematuria 0 0 1 (16.7%) 0 0 0 0

General disorders and administration 2 1

site conditions (16.7%) (16.7%) 1 (16.7%) 0 1 (16.7%) 0 0

Fatigue 1 (8.3%) 0 0 0 1 (16.7%) 0 0

Influenza like illness 1 (8.3%) 0 0 0 0 0 0 Injection site erythema 1 (8.3%) 0 0 0 0 0 0

1

Pyrexia 0 (16.7%) 1 (16.7%) 0 0 0 0 2 2

Investigations (16.7%) 0 1 (16.7%) 0 0 0 (33.3%)

Aspartate aminotransferase 1 increased 0 0 0 0 0 0 (16.7%)

SAR156597

Primary system organ class Placebo 10 mg 20 mg 40 mg 80 mg 150 mg 300 mg Preferred term [n (%)] (N=12) (N=6) (N=6) (N=6) (N=6) (N=6) (N=6)

Blood creatine phosphokinase 1 increased 1 (8.3%) 0 1 (16.7%) 0 0 0 (16.7%)

1

C-reactive protein increased 0 0 0 0 0 0 (16.7%)

1

Liver function test abnormal 0 0 0 0 0 0 (16.7%)

Activated partial thromboplastin

time prolonged 1 (8.3%) 0 0 0 0 0 0

Transaminases increased 1 (8.3%) 0 0 0 0 0 0

Injury, poisoning and procedural 3

complications (25.0%) 0 1 (16.7%) 0 1 (16.7%) 3 (50.0%) 0

Arthropod bite 1 (8.3%) 0 0 0 0 1 (16.7%) 0

Contusion 0 0 1 (16.7%) 0 1 (16.7%) 0 0

Excoriation 1 (8.3%) 0 1 (16.7%) 0 0 2 (33.3%) 0

Laceration 1 (8.3%) 0 0 0 0 0 0

Multiple fractures 0 0 0 0 0 1 (16.7%) 0

Muscle strain 0 0 0 0 0 1 (16.7%) 0

Road traffic accident 0 0 1 (16.7%) 0 0 1 (16.7%) 0

TEAE: Treatment emergent adverse event, SOC: Sytem organ class, PT: Preferred term

MedDRA 14.1

N = Number of subjects treated within each group, n (%) = number and % of subjects with at least one TEAE in each category

Note: Table sorted by SOC internationally agreed order and decreasing frequency of PT in SAR156597 300 mg group

Note: An adverse event is considered as treatment emergent if it occurred from the time of the first investigational product (IP) administration up to the end of study visit (included).

PGM=PRODOPS/SAR156597/TDU1 1325/CSR/REPORT/PGM/ae_iaeteae_s_t.sas OUT=REPORT/OUTPUT/ae_iaeteae_s_t (08MAR2012 - 15:32)

Table 25. Hematology - Number of subjects with abnormalities (PCSA) during the TEAE period according to baseline status - safety population

Placebo

(N=12) SAR156597

10 mg 20 mg 40 mg 80 mg 150 mg 300 mg

(N=6) (N=6) (N=6) (N=6) (N=6) (N=6)

Laboratory parameter Nor. Abn. Nor. Abn. Nor. Abn. Nor. Abn. Nor. Abn. Nor. Abn. Nor. Abn. PCSA criteria n/N1 bas. bas. bas. bas. bas. bas. bas. bas. bas. bas. bas. bas. bas. bas.

Hemoglobin

Deer, from B > 20 g/L 1/12 na 1/6 na 0/6 na 0/6 na 0/6 na 1/6 na 0/6 na

Platelet count (thrombocyte

count) 0/12 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0

< 100 Giga/L

White blood cell count

(leukocyte count)

< 3.0 Giga/L (Non-Black); < 0/12 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0

2.0 Giga/L (Black)

Neutrophils

< 1.5 Giga/L (Non-Black); <

1.0 Giga/L (Black) 0/12 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0 1/6 0/0

Placebo

(N= =12) SAR156597

10 m« 20 m« 40 m» 80 m« 150 m« 300 mg

(N=6) (N=6) (N=6) (N= =6) (N=6) (N= =6)

Laboratory parameter Nor. Abn. Nor. Abn. Nor. Abn. Nor. Abn. Nor. Abn. Nor. Abn. Nor. Abn.

PCSA criteria n/N1 bas. bas. bas. bas. bas. bas. bas. bas. bas. bas. bas. bas. bas. bas.

Eosinophils

> 0.5 Giga/L or > ULN (if ULN 0/12 0/0 0/6 0/0 0/6 0/0 0/5 1/1 1/6 0/0 0/6 0/0 0/6 0/0

> 0.5 Giga/L)

PCSA: Potentially Clinically Significant Abnormalities (Version of 14-SEP-2009)

LLN/ULN = Lower/Upper Limit of Normal range, B = Baseline, Nor. bas. = Normal baseline, Abn. bas. = Abnormal baseline (LLN/ULN or PCSA), Miss, bas. = Missing baseline, na = not applicable

n/N1 = number of subjects who met the criterion at least once/ number of subjects within each group who had that parameter assessed

For hemoglobin, baseline values < LLN or > ULN (or LLN/ULN missing) are counted in one unique group (ie as normal), for eosinophils, values < LLN

(or LLN missing) are counted as normal.

Note: A PCSA is considered to be on-treatment if it occurred from the time of the first investigational product (IP) administration up to the end of study visit (included).

PGM=PRODOPS/SAR156597/TDU1 1325/CSR/REPORT/PGM/lab_lbpcsa_s_t.sas OUT=REPORT/OUTPUT/lab_lbpcsa_s_t_hem_i.rtf (08MAR2012 - 15:33)

Table 26. Biochemistry - Number of subjects with abnormalities (PCSA) during theTEAE period according to baseline status - safety population

Placebo

(N=12) SAR156597

10 m« 20 m« 40 m» 80 m« 150 m« 300 nig

(N=6) (N=6) (N=6) (N=6) (N=6) (N=6)

Laboratory parameter Abn. Nor. Abn. Nor. Abn. Nor. Abn. Nor. Abn. Nor. Abn. Nor. Abn. PCSA criteria n/Nl bas. bas. bas. bas. bas. bas. bas. bas. bas. bas. bas. bas. bas.

Glucose

< 3.9 mmol/L and < LLN 1/12 0/0 1/6 0/0 0/5 1/1 0/6 0/0 1/6 0/0 0/6 0/0 1/5 0/1

> 1 1.1 mmol/L 0/12 0/0 0/6 0/0 0/5 0/1 0/6 0/0 0/6 0/0 0/6 0/0 0/5 0/1 (unfasted); > 7 mmol/L

(fasted)

Total cholesterol

> 7.74 mmol/L 0/8 0/4 0/6 0/0 0/6 0/0 0/4 0/2 0/5 0/1 0/6 0/0 0/4 0/2

Triglycerides

> 4.6 mmol/L 0/10 2/2 0/6 0/0 0/6 0/0 0/4 2/2 0/6 0/0 0/5 0/1 1/4 0/2

Creatine phospho kinase

> 3 ULN 1/12 0/0 0/6 0/0 1/5 0/1 0/6 0/0 0/5 0/1 0/4 1/2 1/6 0/0

> 10 ULN 1/12 0/0 0/6 0/0 0/5 0/1 0/6 0/0 0/5 0/1 0/4 0/2 1/6 0/0

Highly sensitive c- reactive protein 1/12 0/0 OO

1/ 0/0 0/6 0/0 0/6 0/0 0/6 0/0 1/6 0/0 1/6 0/0 > 2 ULN

Sodium

< 129 mmol/L 0/12 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0 > 160 mmol/L 0/12 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0

Placebo

(N=12) SAR156597

10 mg 20 mg 40 mg 80 mg 150 mj 300 mg

(N=6) (N= =6) (N= =6) (N= =6) (N=6) (N= =6)

Laboratory parameter Nor. Abn. Nor. Abn. Nor. Abn. Nor. Abn. Nor. Abn. Nor. Abn. Nor. Abn.

PCSA criteria n/Nl bas. bas. bas. bas. bas. bas. bas. bas. bas. bas. bas. bas. bas. bas.

Potassium

< 3 mmol/L 0/12 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0

> 5.5 mmol/L 0/12 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0

Creatinine

> 150 pmol/L (Adults) 0/12 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0

> 30% change from B 0/12 na 0/6 na 0/6 na 0/6 na 0/6 na 0/6 na 0/6 na

ALT (SGPT-ALAT)

> 3 ULN 0/12 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0

AST (SGOT-ASAT)

> 3 ULN 1/12 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0

> 5 ULN 1/12 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0

> 10 ULN 0/12 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0

Alkaline phosphatase

> 1 .5 ULN 0/12 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0 0/6 0/0

Total bilirubin

> 1 .5 ULN 0/12 0/0 0/6 0/0 0/6 0/0 1/5 1/1 0/6 0/0 0/6 0/0 0/6 0/0

Placebo

(N=12) SAR156597

10 mg 20 mg 40 mg 80 mg 150 mg 300 mg

(N=6) (N=6) (N=6) (N=6) (N=6) (N=6)

Laboratory parameter Nor. Abn. Nor. Abn. Nor. Abn. Nor. Abn. Nor. Abn. Nor. Abn. Nor. Abn.

PCSA criteria n/Nl bas. bas. bas. bas. bas. bas. bas. bas. bas. bas. bas. bas. bas. bas.

> 2 ULN 0/12 0/0 0/6 0/0 0/6 0/0 0/5 0/1 0/6 0/0 0/6 0/0 0/6 0/0

PCSA: Potentially Clinically Significant Abnormalities (Version of 14-SEP-2009)

LLN/ULN = Lower/Upper Limit of Normal range, B = Baseline, Nor. bas. = Normal baseline, Abn. bas. = Abnormal baseline (LLN/ULN or PCSA), Miss, bas. = Missing baseline, na = not applicable

n/N1 = number of subjects who met the criterion at least once/ number of subjects within each group who had that parameter assessed

For % change creatinine, baseline values < LLN or > ULN (or LLN/ULN missing) are counted in one unique group (ie as normal), for CPK, ALT, AST,

ALP and Total Bilirubin, values < LLN (or LLN missing) are counted as normal.

Note: A PCSA is considered to be on-treatment if it occurred from the time of the first investigational product (IP) administration up to the end of study visit (included).

PGM=PRODOPS/SAR156597/TDU 1 1325/CSR/REPORT/PGM/lab_lbpcsa_s_t.sas OUT=REPORT/OUTPUT/lab_lbpcsa_s_t_bio_i.rtf (08MAR2012 - 15:32)

Table 27. Listing of subjects with combined PCSAs for liver function - safety population

No occurrence

PCSA: Potentially Clinically Significant Abnormalities (Version of 14-SEP-2009) ULN = Upper Limit of Normal range, r = rechecked values, B = Baseline value

^* = ALT > 3 ULN and Total bilirubin > 2 ULN during the study, with at least one of them being post dose

# = Conjugated Bilirubin > 35% Total bilirubin and Total Bilirubin > 1 .5 ULN on the same sample post dose

+/++ = Abnormal value reaching a i ^st /2 ^nd upper PCSA limit

Note: A PCSA is considered to be on-treatment if it occurred from the time of the first investigational product (IP) administration up to the end of study visit (included). PGM=PRODOPS/SAR156597/TDU1 1325/CSR/REPORT/PGM/lab_lbhep_s_l.sas OUT=REPORT/OUTPUT/lab_lbhep_sJ_i.rtf (08MAR2012 - 15:33)

Table 28. Listing of hsCRP > 10 mg/L for at least 72 hours

Sample

Theor. Lab. hsCRP

Treatment group Subject Visit time Date Time code (mg/L)

SAR156597150 mg 840001039 D-1 2011-06-07 09:57 840000276 0.8B

D1 T8H 2011-06-08 16:25 840000276 0.5

D2 T24H 2011-06-09 08:25 840000276 0.5

D3 T48H 2011-06-10 08:25 840000276 0.5

D4 T72H 2011-06-11 08:38 840000276 0.7

D5 2011-06-12 08:14 840000276 0.7

D8 2011-06-15 08:53 840000276 0.8

D15 2011-06-22 09:00 840000276 1.6

D29 2011-07-06 10:10 840000276 18.8H+ r 2011-07-14 11:44 840000276 13.9H+

D57 2011-08-03 10:13 840000276 1.2

EOS 2011-08-31 10:25 840000276 0.9 r 2011-10-13 10:36 840000276 2.2

FUP 2011-12-01 10:56 840000276 1.3 r 2012-02-06 10:59 840000276 0.8

SAR156597300 mg 840001046 D-1 2011-11-15 08:05 840000276 0.4B

D1 T8H 2011-11-16 17:35 840000276 0.4

D2 T24H 2011-11-17 09:35 840000276 0.3

D3 T48H 2011-11-18 09:35 840000276 0.2

D4 T72H 2011-11-19 09:35 840000276 0.6

D5 2011-11-20 09:35 840000276 0.6

D8 2011-11-23 08:14 840000276 0.3

D15 2011-11-30 08:21 840000276 0.3

D29 2011-12-14 08:21 840000276 0.7

D57 2012-01-11 08:25 840000276 0.3

EOS 2012-02-08 08:32 840000276 37.0H+ r 2012-02-10 07:55 840000276 91.5H+ r 2012-02-13 08:17 840000276 23.6H+ r 2012-02-27 08:07 840000276 0.5

L or H : Abnormal value < LLN or > ULN, -/- or +/++ : Abnormal value reaching a 1st/2nd lower or a 1st/2nd upper PCSA limit

PCSA: Potentially Clinically Significant Abnormalities (Version of 14-SEP-2009) LLN/ULN = Lower/Upper Limit of Normal range, r = rechecked values, B = Baseline value

Baseline is Day-1

PGM=PRODOPS/SAR156597/TDU11325/CSR/REPORT/PGM/lab_hscrp_s_l. sas OUT=REPORT/OUTPUT/lab_hscrp_s J_1_i.rtf (08MAR2012 - 15:34) Table 29. Listing of subjects with hsCRP > 20 mg/L for 2 consecutive blood collections >= 24 hours apart

Sample

Theor. Lab. hsCRP

Treatment group Subject Visit time Date Time code (mg/L)

SAR156597300 mg 840001046 D-1 2011-11-15 08:05 840000276 0.4B

D1 T8H 2011-11-16 17:35 840000276 0.4

D2 T24H 2011-11-17 09:35 840000276 0.3

D3 T48H 2011-11-18 09:35 840000276 0.2

D4 T72H 2011-11-19 09:35 840000276 0.6

D5 2011-11-20 09:35 840000276 0.6

D8 2011-11-23 08:14 840000276 0.3

D15 2011-11-30 08:21 840000276 0.3

D29 2011-12-14 08:21 840000276 0.7

D57 2012-01-11 08:25 840000276 0.3

EOS 2012-02-08 08:32 840000276 37.0H+ r 2012-02-10 07:55 840000276 91.5H+ r 2012-02-13 08:17 840000276 23.6H+ r 2012-02-27 08:07 840000276 0.5

PGM=PRODOPS/SAR156597/TDU11325/CSR/REPORT/PGM/lab_hscrp

OUT=REPORT/OUTPUT/lab_hscrp_s_l_2_i.rtf (08MAR2012 - 15:34)

Table 30. Listing of subjects with cTnl > 2ULN

No occurrence

L or H : Abnormal value < LLN or > ULN, -/- or +/++ : Abnormal value reaching 1st/2nd lower or a 1st/2nd upper PCSA limit

cTnl = Cardiac Troponin I

PGM=PRODOPS/SAR156597/TDU11325/CSR/REPORT/PGM/lab_lbctnl_s_l .

OUT=REPORT/OUTPUT/lab_lbctnl_sJ_i.rtf (08MAR2012 - 15:34) Table 31. Vital signs - Number of subjects with abnormalities (PCSA) during the TEAE period - safety population

SAR156597

Vital signs parameter Placebo 10 mg 20 mg 40 mg 80 mg 150 mg 300 mg PCSA criteria n/N1 (N=12) (N=6) (N=6) (N=6) (N=6) (N=6) (N=6)

Systolic blood pressure

< 95 mmHg and deer, from B > 20 mmHg 0/12 0/6 0/6 0/6 0/6 0/6 0/6

> 140 mmHg and incr. from B > 20 mmHg 0/12 0/6 0/6 0/6 0/6 0/6 1/6 Diastolic blood pressure

< 45 mmHg and deer, from B > 10 mmHg 0/12 1/6 0/6 0/6 0/6 0/6 0/6

> 90 mmHg and incr. from B > 10 mmHg 0/12 0/6 0/6 0/6 0/6 0/6 0/6 Orthostatic systolic blood pressure

< -20 mmHg 0/12 1/6 1/6 1/6 0/6 1/6 1/6

Orthostatic diastolic blood pressure

< -10 mmHg 0/12 1/6 1/6 1/6 1/6 1/6 1/6 Heart rate

< 40 bpm and deer, from B > 20 bpm 0/12 0/6 0/6 0/6 0/6 0/6 0/6

> 100 bpm and incr. from B > 20 bpm 0/12 0/6 0/6 0/6 0/6 0/6 0/6 Weight

> 5% deer, from B 2/12 0/6 0/6 0/6 0/6 0/6 0/6

> 5% incr. from B 0/12 0/6 0/6 0/6 2/6 0/6 0/6

PCSA: Potentially Clinically Significant Abnormalities (Version of 14-SEP-2009)

decr./incr. = decrease/increase, B = Baseline

n/N 1 = Number of subjects who met the criterion at least once/ number of subjects within each group who had that parameter assessed

Note: A PCSA is considered to be on-treatment if it occurred from the time of the first investigational product (IP) administration up to the end of study visit (included).

Orthostatic = standing after 3 minutes - supine after 10 minutes

PGM=PRODOPS/SAR156597/TDU1 1325/CSR/REPORT/PGM/osa_vspcsa_s_t.sas OUT=REPORT/OUTPUT/osa_vspcsa_s_t_i.rtf (08MAR2012 - 15:34)

Table 32. ECG - Number of subjects with abnormalities (PCSA) during the TEAE period - safety population

SAR156597

ECG parameter (automatic

reading) Placebo 10 mg 20 mg 40 mg 80 mg 150 mg 300 mg

PCSA criteria n/N1 (N=12) (N=6) (N=6) (N=6) (N=6) (N=6) (N=6)

Heart rate

< 40 bpm and deer, from B > 20

bpm 0/12 0/6 0/6 0/6 0/6 0/6 0/6

≥ 100 bpm and incr. from B≥ 20

bpm 0/12 0/6 0/6 0/6 0/6 0/6 0/6

PR interval

> 220 ms 1/12 1/6 0/6 0/6 0/6 0/6 0/6 QRS interval

> 120 ms 1/12 0/6 2/6 0/6 0/6 0/6 0/6

QTc interval

Borderline: 431 -450 ms (Male);

451 -470 ms (Female) 3/12 0/6 0/6 2/6 1/6 3/6 0/6

Prolonged: > 450 ms (Male); >

470 ms (Female) 0/12 0/6 0/6 0/6 0/6 0/6 0/6

> 500 ms 0/12 0/6 0/6 0/6 0/6 0/6 0/6

QTc interval - change from baseline

Borderline: Incr. from B 30-60 ms 2/12 2/6 1/6 1 /6 1 /6 0/6 0/6 Prolonged: Incr. from B > 60 ms 0/12 0/6 0/6 0/6 0/6 0/6 0/6

PCSA: Potentially Clinically Significant Abnormalities (Version of 14-SEP-2009)

decr./incr. = decrease/increase, B = Baseline

n/N1 = number of subjects who met the criterion at least once/ number of subjects within each group who had that parameter assessed

Note: A PCSA is considered to be on-treatment if it occurred from the time of the first investigational product (IP) administration up to the end of study visit (included).

PGM=PRODOPS/SAR156597/TDU1 1325/CSR/REPORT/PGM/osa_egpcsa_s_t.sas OUT=REPORT/OUTPUT/osa_egpcsa_s_t_i.rtf

(08MAR2012 - 15:33)

Table 33. Listing of subjects with prolonged QTc and/or delta QTc>60 ms (automatic reading) - safety population

No occurrence

PCSA: Potentially Clinically Significant Abnormalities (Version of 14-SEP-2009)

B = Baseline, Delta = change from baseline (B), r = rechecked values

- or +/++ : Abnormal value reaching the lower or a 1 ^st /2 ^nd upper PCSA limit

Note : Baseline is defined as the mean of triplicates at D1 predose.

Note: A PCSA is considered to be on-treatment if it occurred from the time of the first investigational product (IP) administration up to the end of

study visit(included). PGM=PRODOPS/SAR156597/TDU1 1325/CSR/REPORT/PGM/osa_egauprol_s_l.sas

OUT=REPORT/OUTPUT/osa_egauprol_s_l_i.rtf (08MAR2012 - 15:33)

CD

Table 34. Total IgE - Descriptive statistics

Raw data % Change from baseline

Media

N Mean SD SEM Median Min Max N Mean SD SEM n Min Max ace bo

Baseline 12 80.70 109.71 31.672 35.75 1.0 397.0

D2 T24H 12 85.87 121.41 35.049 36.90 1 .0 435.0 12 2.26 1 1.32 3.267 3.27 -25.6 19.7

D15 12 82.64 1 12.33 32.427 35.40 1.0 393.0 12 -1.40 1 1.83 3.416 -0.84 -19.2 30.3

D29 12 76.58 109.84 31 .709 34.95 1.0 402.0 12 -6.06 10.09 2.912 -2.98 -23.2 6.0

12.98

EOS 12 76.26 103.95 30.007 32.70 1.0 386.0 12 7.74 44.99 8 -1.39 -31.0 142.4

SAR156597

10 mg

Baseline 6 26.18 1 1.65 4.754 24.70 14.3 40.1

D2 T24H 6 26.67 1 1.66 4.760 25.50 14.4 39.8 6 2.12 3.13 1.280 0.67 -0.7 7.8

D15 6 23.27 9.44 3.854 20.15 14.8 38.5 6 -7.25 17.53 7.157 -3.27 -41.8 7.7

D29 6 22.43 9.01 3.678 19.90 14.5 38.1 6 -10.02 18.40 7.51 1 -5.72 -45.0 5.6

EOS 6 23.55 9.76 3.983 22.05 14.1 39.2 6 -7.51 13.14 5.365 -4.31 -33.1 4.4

SAR156597

20 mg

1084.

Baseline 6 198.60 434.00 177.179 27.30 1 .0 0

1050.

D2 T24H 6 192.57 420.30 171.585 27.60 1 .0 0 6 -1.85 5.59 2.284 -2.00 -8.9 7.4

D15 6 163.95 352.56 143.931 23.85 1 .0 883.0 6 -8.53 8.76 3.578 -8.13 -18.5 2.0

D29 6 161 .83 346.71 141.545 25.35 1 .0 869.0 6 -6.62 7.02 2.865 -4.80 -19.8 0.0

EOS 6 179.87 393.19 160.519 23.50 1.0 982.0 6 -8.19 7.64 3.1 18 -6.24 -20.0 0.0

Raw data % Change from baseline

Media

N Mean SD SEM Median Min Max N Mean SD SEM n Min Max

SAR156597

40 mg

Baseline 6 134.77 191.25 78.076 67.50 19.2 516.0

D2 T24H 6 139.22 202.79 82.789 64.70 19.8 545.0 6 1 .61 4.05 1.653 2.68 -6.2 5.6

D15 5 125.94 178.28 79.730 31.00 20.5 437.0 5 -1. .33 8.59 3.841 1.75 -15.3 6.8

D29 5 125.32 186.47 83.390 31.30 19.2 454.0 5 -5. .70 6.91 3.091 -2.19 -14.3 0.0

EOS 6 129.82 172.61 70.467 73.85 25.0 477.0 6 28. .14 85.72 34.994 -4.40 -14.4 202.6

SAR156597

80 mg

Baseline 6 56.05 44.60 18.207 50.85 7.2 1 18.0

D2 T24H 6 56.03 46.43 18.954 50.10 3.8 1 19.0 6 -7.61 19.58 7.995 0.63 -47.2 3.8

D15 6 53.33 40.62 16.585 56.65 3.9 103.0 6 -9.13 21.02 8.582 -7.95 -45.8 17.7

D29 6 56.83 44.87 18.320 60.00 3.0 1 14.0 6 -6.92 28.41 1 1.598 -4.14 -58.3 29.2

EOS 6 56.60 43.95 17.942 59.95 2.8 1 14.0 6 -2.35 36.51 14.904 -7.33 -61.1 37.4

SAR156597

150 mg

Baseline 6 38.67 28.37 11.582 32.45 13.0 93.8

D2 T24H 6 38.67 27.72 11.315 31.40 1 1.7 91.0 6 -0.47 9.00 3.674 -2.91 -10.0 16.6

D15 6 36.07 26.61 10.862 30.95 10.6 87.1 6 -7.95 6.29 2.569 -8.09 -18.5 0.0

D29 6 47.43 51.09 20.857 31.15 12.1 150.0 6 7.12 26.56 10.844 -1.30 -1 1.4 59.9

EOS 6 39.95 29.18 1 1.912 30.65 13.0 96.4 6 3.86 12.13 4.952 4.23 -16.3 20.0

Raw data % Change from baseline

Media

N Mean SD SEM Median Min Max N Mean SD SEM n Min Max

SAR156597

300 mg

Baseline 6 51.15 62.93 25.689 24.45 20.0 179.0

D2 T24H 6 48.52 61.22 24.992 21.60 20.3 173.0 6 -6.57 6.20 2.532 -6.57 -16.9 2.0

D15 6 37.43 42.19 17.223 21.75 14.4 123.0 6 -21.12 18.99 7.753 -28.65 -31.3 17.4

D29 6 36.47 39.32 16.051 20.85 15.1 1 16.0 6 -21.67 16.26 6.637 -26.71 -35.2 10.1

15.90

EOS 6 50.30 56.09 22.900 22.95 13.7 158.0 6 0.82 38.97 9 -10.03 -31.5 78.0

N corresponds to the count of subjects with available data

Baseline is the Day-1 value

Values below LOQ (Limit Of Quantification) were replaced by LOQ/2

PGM=PRODOPS/SAR156597/TDU1 1325/CSR/REPORT/PGM/pd_lbsum_s_t.sas

OUT=REPORT/OUTPUT/pdJbsum_s_t_1 _i.rtf (08MAR2012 - 15:35

Table 35. Pharmacokinetic parameters for plasma concentration of SAR156597 after a single subcutaneous dose given to young healthy male subjects (TDU11325)

Mean ± SD (Geometric Mean) [CV%] Plasma SAR156597

10mg 20mg 40mg 80mg 150mg 300mg

N 6 6 5 6 6 6

0.971 ± 1.69 ± 3.32 ±

Cmax 7.01 ± 1.97 9.44 ± 1.78 24.1 ±4.60

0.254 0.222 0.797

(0.943) (1.67) (3.25) (6.81) (9.29)

(MQml) (23.8) [19.0]

[26.1] [13.1] [24.0] [28.1] [18.9]

t ^l max ^a 108 96 119 144 168 96

(hr) (48- 168) (73- 170) (48 - 240) (72 - 240) (120-240) (71 - 168) tl/2z 369 ± 106 350 ± 54.4 320 ± 34.8 372 ± 104 464 ± 72.0 315 ± 71.4

(345) (319) (358)

(hr) (355) [28.6] (460) [15.5] (308) [22.7]

[15.6] [10.9] [27.9]

1000 ± 1920 ± 3670 ± 11300 ±

All Cast 607 ± 174 5570 ± 761

295 377 1100 2900

(967) (1890) (3530) (5530) (10900)

^g ^« hr/ml) (587) [28.7]

[29.4] [19.6] [30.0] [13.7] [25.7]

1050 ± 1960 ± 3780 ± 11500 ±

AUC 644 ± 185 5820 ± 844

297 378 1140 3000

(1010) (1930) (3630) (5770) (11100)

^g ^« hr/ml) (622) [28.7]

[28.3] [19.3] [30.2] [14.5] [26.1]

9230 ± 11400 ± 10700 ± 11400 ± 16500 ± 13100 ±

V _ss /F

2400 2370 1740 2870 2270 2300

(8990) (11100) (10600) (11100) (16300) (12900)

(ml)

[26.0] [20.9] [16.2] [25.1] [13.8] [17.6]

20.4 ± 21.0 ±

CL/F 16.6 ±4.55 23.0 ± 7.62 26.2 ± 3.66 28.2 ± 10.2

5.86 4.05

(16.1) (19.7) (20.7) (22.0) (26.0)

(ml/hr) (27.0) [36.2]

[27.4] [28.7] [19.2] [33.1] [14.0]

t Mast ^a 1679 1680 1704 2016 2020 2016

(1008 - (1345- (1633 - (1368- (2014- (1344-

(hr)

2016) 2016) 2016) 2018) 2111) 2039) ^a Median (Min - Max)

NA = Not Applicable

Source = PKS Study : TDU11325 DBLII E02; Scenario: P-D-EV-SD-E02, Version 1 Date/Time = 3/6/201211:25:36 AM