Abstract: Provided are various embodiments relating to interleukin 13 receptor subunit alpha-1/interleukin 4 receptor subunit alpha (IL13R/IL4R) contiguous polypeptides derived from companion animal species and that bind to IL13 and/or IL4. Such contiguous polypeptides can be used in methods to treat IL13 and/or IL4-induced conditions in companion animals, such as canines, felines, and equines.

Abstract: Provided are various embodiments relating to anti-IL31 antibodies binding to canine IL31. Such antibodies can be used in methods to treat IL31-induced conditions in companion animals, such as canines, felines, and equines.

Abstract: Provided are various embodiments relating to caninized TNF? antibodies and caninized NGF antibodies. Such antibodies can be used in methods to treat canines with inflammatory conditions, such as inflammatory bowel disease and/or in methods to treat canines with pain, such as osteoarthrititic pain, back pain, cancer pain, and/or a neuropathic pain.

Abstract: Provided are various embodiments relating to anti-IL4R antibodies that bind to canine IL4R. In various embodiments, such anti-IL4R antibodies can be used in methods to treat IL4/IL13-induced conditions, such as atopic dermatitis, allergic dermatitis, pruritus, asthma, psoriasis, scleroderma and eczema, in companion animals, such as canines and felines. Also provided are various embodiments relating to variant IgG Fc polypeptides and variant light chain constant regions of companion animal species for the preparation of antibodies or bispecific antibodies.

Abstract: Provided are various embodiments relating to feline erythropoietin (EPO) polypeptide analogs with one or more additional glycosylation sites and methods of producing and using the same to treat anemia in companion animals. Also provided are various embodiments relating to EPO polypeptides having a mutation in the second binding site, polypeptides comprising an extracellular domain of EPO receptor, and methods of using the same for treating polycythemia in mammals.

Abstract: Provided are various embodiments relating to anti-IL31 antibodies binding to canine IL31. Such antibodies can be used in methods to treat IL31-induced conditions in companion animals, such as canines, felines, and equines.

Abstract: Provided are various embodiments relating to long-acting anti-IL31 antibodies binding to canine IL31 and/or feline IL31. Such antibodies can be used in methods to treat IL31-induced conditions in companion animals, such as canines, felines, and equines.

Abstract: Provided are various embodiments relating to anti-IL31 antibodies binding to canine IL31. Such antibodies can be used in methods to treat IL31-induced conditions in companion animals, such as canines, felines, and equines.

Abstract: Provided are various embodiments relating to anti-IL31 antibodies binding to canine IL31. Such antibodies can be used in methods to treat IL31-induced conditions in companion animals, such as canines, felines, and equines.

Abstract: Provided are various embodiments relating to feline erythropoietin (EPO) polypeptide analogs with one or more additional glycosylation sites and methods of producing and using the same to treat anemia in companion animals. Also provided are various embodiments relating to EPO polypeptides having a mutation in the second binding site, polypeptides comprising an extracellular domain of EPO receptor, and methods of using the same for treating polycythemia in mammals.

Abstract: Provided are various embodiments relating to anti-IL31 antibodies having enhanced binding to canine IL31 and feline IL31. Such antibodies can be used in methods to treat IL31-induced conditions in companion animals, such as canines and felines. Antibodies with enhanced binding to canine IL31 and feline IL31 are provided Antibody heavy chains and light chains that are capable of forming antibodies that bind canine and feline IL31 are also provided.

Abstract: Provided are various embodiments relating to parvovirus antibodies, including caninized, felinized, and chimeric antibodies, that bind to canine and/or feline parvovirus, for example, having improved expression characteristics. In various embodiments, the parvovirus antibodies have ADCC, ADCP, and/or CDC effector functions. In various embodiments, such monoclonal parvovirus antibodies can be used in methods to prevent and/or treat parvoviral infection in subjects, such as dogs and cats. For example, the parvovirus antibodies provided may be used to provide passive immunity against infection with a canine or feline parvovirus.

Abstract: Provided are various embodiments relating to anti-IL17A antibodies and IL17Ra ECD polypeptides that bind to IL17A. In various embodiments, such anti-IL17A antibodies or IL17Ra ECD polypeptides can be used in methods to treat IL17-induced conditions in subjects, such as humans or companion animals, such as canines, felines, and equines. Also provided are various embodiments relating to IgG Fc variant polypeptides having one or more amino acid substitutions for reducing binding to C1q and/or CD16. In some embodiments, the IgG Fc variants and/or polypeptides comprising the IgG Fc variants (e.g., fusion polypeptides comprising the IgG Fc variants and the anti-IL17A antibodies and/or IL17Ra ECD polypeptides described herein) may have reduced complement-mediated immune responses and/or antibody-dependent cell-mediated cytotoxicity.

Abstract: Provided are various embodiments relating to TrkA ECD polypeptides from companion animal species that bind to NGF. Such polypeptides can be used in methods to treat NGF-induced condition related to chronic pain and/or inflammatory pain in companion animals, such as canines, felines, and equines.

Abstract: Provided are various embodiments relating to anti-IL17A antibodies and IL17Ra ECD polypeptides that bind to IL17A. In various embodiments, such anti-IL17A antibodies or IL17Ra ECD polypeptides can be used in methods to treat IL17-induced conditions in subjects, such as humans or companion animals, such as canines, felines, and equines. Also provided are various embodiments relating to IgG Fc variant polypeptides having one or more amino acid substitutions for reducing binding to C1q and/or CD16. In some embodiments, the IgG Fc variants and/or polypeptides comprising the IgG Fc variants (e.g., fusion polypeptides comprising the IgG Fc variants and the anti-IL17A antibodies and/or IL17Ra ECD polypeptides described herein) may have reduced complement-mediated immune responses and/or antibody-dependent cell-mediated cytotoxicity.

Abstract: Provided are various embodiments relating to variant IgG Fc polypeptides of companion animals having increased Protein A binding for ease of purification, decreased C1q binding for reduced complement-mediated immune responses, decreased CD 16 binding (e.g., for reduced antibody-dependent cellular cytotoxicity (ADCC) induction), increased stability, and/or the ability to form multimeric proteins. In addition, various embodiments relating to antibodies and fusion proteins comprising such variant IgG Fc polypeptides are provided. In various embodiments, such polypeptides may be used to treat companion animals, such as canines, felines, and equines.

Abstract: Provided are various embodiments relating to anti-IL4R antibodies that bind to canine IL4R. In various embodiments, such anti-IL4R antibodies can be used in methods to treat IL4/IL13-induced conditions, such as atopic dermatitis, allergic dermatitis, pruritus, asthma, psoriasis, scleroderma and eczema, in companion animals, such as canines and felines. Also provided are various embodiments relating to variant IgG Fc polypeptides and variant light chain constant regions of companion animal species for the preparation of antibodies or bispecific antibodies.

Abstract: Provided are various embodiments relating to erythropoietin (EPO) polypeptide analogs with one or more additional glycosylation sites and/or additional cysteine residues and methods of producing and using the same to treat anemia in companion animals. Also provided are various embodiments relating to polypeptides comprising an extracellular domain of EPO receptor and methods of using the same for treating polycythemia in mammals.

Abstract: Provided are various embodiments relating to IL13R/IL4R heterodimeric proteins derived from companion animal species and that bind to IL13 and/or IL4. Such heterodimeric proteins can be used in methods to treat IL13 and/or IL4-induced conditions in companion animals, such as canines, felines, and equines.

Abstract: Provided are various embodiments relating to variant IgG Fc polypeptides with altered FcRn binding activity. Also provided are polypeptides and pharmaceutical compositions comprising the variant IgG Fc polypeptides described herein. Polypeptides comprising variant IgG Fc polypeptides of the present invention may have extended half-life in vivo. Such products may be used in methods to treat disease in companion animals, such as canines, felines, and equines.