Diagnosis and treatment of cancer using anti-gpr49 antibody

C - Chemistry – Metallurgy – 07 – K

Patent

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Details

C07K 16/30 (2006.01) A61K 39/395 (2006.01) A61P 35/00 (2006.01) C07K 19/00 (2006.01) G01N 33/536 (2006.01) G01N 33/574 (2006.01) C12N 15/09 (2006.01)

Patent

CA 2705509

Antibodies that bind to a GPR49 protein and have cell proliferation inhibitory activity against cells expressing the GPR49 protein are disclosed. Cell proliferation inhibitory activities are cytotoxic activities such as antibody-dependent cell-mediated cytotoxicity and complement-dependent cytotoxicity. Pharmaceutical compositions, cell- proliferation inhibitors, and anticancer agents containing an antibody of the present invention as an active ingredient are also disclosed. Examples of cancer include gastric cancer, colon cancer, hepatocellular carcinoma, lung cancer, prostate cancer, ovarian cancer, Ewing's sarcoma, and glioma. Furthermore, methods for diagnosing cancer by detecting expression of a GPR49 protein or a gene encoding a GPR49 protein, and diagnostic agents and kits to be used in these methods are also disclosed.

L'invention porte sur un anticorps qui peut se lier à la protéine GPR49 et qui a une activité d'inhibition de la prolifération cellulaire à l'encontre d'une cellule capable de produire la protéine GPR49. L'activité d'inhibition de la prolifération cellulaire peut être une activité cytotoxique telle qu'une cytotoxicité dépendante d'un anticorps ou une cytotoxicité dépendante d'un complément. L'invention porte également sur une composition pharmaceutique ; sur un inhibiteur de prolifération cellulaire ; et sur un agent anti-cancéreux, chacun desquels comprenant l'anticorps comme ingrédient actif. Le cancer peut être un cancer de l'estomac, un cancer colorectal, un cancer hépatocellulaire, un cancer du poumon, un cancer de la prostate, un cancer ovarien, un sarcome d'Ewing ou un gliome. L'invention porte également sur un procédé pour le diagnostic du cancer par détection de la protéine GPR49 ou de l'expression d'un gène codant pour la protéine GPR49 ; et sur un agent de diagnostic et un coffret destinés à être utilisés dans le procédé.

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