Composition and methods of use for therapeutic antibodies...

C - Chemistry – Metallurgy – 07 – K

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C07K 16/28 (2006.01) A61K 39/395 (2006.01)

Patent

CA 2759942

The present invention relates to antibodies that specifically bind to IL12R.beta.1, the non-signal transducing chain of the heterodimeric IL12 receptor (together with IL12R.beta.2 chain) as well as IL23 receptor (together with IL23R.alpha. chain). The inven-tion more specifically relates to specific antibodies that are IL12 and IL23 receptor antagonists capable of inhibiting IL12/IL18 in-duced IFN y production of T cells and compositions and methods of use for said antibodies to treat pathological disorders that can be treated by inhibiting IFN y production, such as rheumatoid arthritis, psoriasis or inflammatory bowel diseases or other autoim-mune and inflammatory disorders.

Cette invention concerne des anticorps qui se lient spécifiquement à IL12Rß1, la chaîne de non-transduction de signal du récepteur hétérodimère d'IL12 (avec la chaîne IL12Rß2) ainsi qu'au récepteur d'IL23 (avec la chaîne IL23Ra). L'invention concerne, plus spécifiquement, des anticorps spécifiques qui sont des antagonistes des récepteurs d'IL12 et d'IL23 capables d'inhiber la production d'IFNy par les cellules T, ladite production d'IFNy étant induite par IL12/IL18, et des procédés d'utilisation desdits anticorps pour traiter des troubles pathologiques qui peuvent être traités par inhibition de la production d'IFNy, tels que la polyarthrite rhumatoïde, le psoriasis ou les maladies intestinales inflammatoires ou autres troubles auto-immuns et inflammatoires.

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