Humanized fc.gamma.riib-specific antibodies and methods of...

C - Chemistry – Metallurgy – 12 – N

Patent

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C12N 15/13 (2006.01) A61K 39/395 (2006.01) A61K 47/48 (2006.01) A61P 35/00 (2006.01) A61P 37/04 (2006.01) A61P 37/06 (2006.01) C07K 16/28 (2006.01) C07K 16/46 (2006.01) C12P 21/08 (2006.01)

Patent

CA 2660592

The present invention relates to humanized Fc.gamma.RIIB antibodies, fragments, and variants thereof that bind human Fc.gamma.RIIB with a greater affinity than said antibody binds Fc.gamma.RIIA. The invention encompasses the use of the humanized antibodies of the invention for the treatment of any disease related to loss of balance of Fc receptor mediated signaling, such as cancer, autoimmune and inflammatory disease. The invention provides methods of enhancing the therapeutic effect of therapeutic antibodies by administering the humanized antibodies of the invention to enhance the effector function of the therapeutic antibodies. The invention also provides methods of enhancing the efficacy of a vaccine composition by administering the humanized antibodies of the invention. The invention encompasses methods for treating an autoimmune disease and methods for elimination of cancer cells that express Fc.gamma.RIIB.

La présente invention concerne des anticorps FcgRIIB humanisés, des fragments et des variantes de ceux-ci qui lient les FcgRIIB humains avec une plus grande homogénéité par rapport aux anticorps liant les FcgRIIA. L'invention comprend l'utilisation des anticorps humanisés de l'invention pour le traitement d'une quelconque maladie en rapport avec la perte d'équilibrage de signalisation chez le récepteur Fc, comme le cancer, une maladie auto-immune et une affection inflammatoire. L'invention fournit des procédés pour améliorer l'effet thérapeutique d'anticorps thérapeutiques en administrant les anticorps humanisés de l'invention pour améliorer la fonction thérapeutique de ces anticorps. L'invention fournit également des procédés pour améliorer l'efficacité d'une composition de vaccin en administrant les anticorps humanisés de l'invention. L'invention comprend des procédés pour traiter une maladie auto-immune et des procédés pour éliminer des cellules cancéreuses qui expriment FcgRIIB.

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