Novel anti-cd98 antibody

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 15/09 (2006.01) A61K 39/395 (2006.01) A61P 35/00 (2006.01) C07K 16/32 (2006.01) C07K 19/00 (2006.01) C12N 1/15 (2006.01) C12N 1/19 (2006.01) C12N 1/21 (2006.01) C12N 5/10 (2006.01) C12P 21/08 (2006.01)

Patent

CA 2648618

A human antibody capable of binding specifically to CD98 which is CD98 originating in the cell membrane of cancer cells and forms a complex with a protein having an amino acid transport activity (for example, LAT1) and a functional fragment of the same. This antibody binds to CD98 forming a dimer with LAT1 on the surface of cancer cells, thus specifically attacks the cancer cells expressing CD98 by using an immunological system of ADCC or CDC and further inhibits the LAT1-mediated amino acid intake by the cancer cells, thus inhibiting the proliferation thereof. Accordingly, it is intended to provide an agent for preventing and treating caner which contains this antibody or a fragment of the antibody, acts on various cancers, is specific to cancer and shows no side effect.

La présente invention concerne un anticorps humain capable de se lier spécifiquement à l'antigène CD98, dont l'origine se trouve dans la membrane cellulaire de cellules cancéreuses, et de former un complexe avec une protéine présentant une activité de transport des acides aminés (par exemple, LAT1), ainsi qu'un fragment fonctionnel dudit anticorps. Cet anticorps se lie au CD98 et forme un dimère avec LAT1 sur la surface des cellules cancéreuse, il attaque ainsi spécifiquement les cellules cancéreuses exprimant le CD98 par l'entremise d'un système immunologique de cytotoxicité cellulaire dépendante des anticorps (ADCC) ou de cytotoxicité dépendante du complément(CDC) et inhibe en outre l'assimilation de l'acide aminé induit par LAT1 par les cellules cancéreuses, inhibant de la sorte leur prolifération. Par conséquent, l'invention concerne un agent qui contient cet anticorps ou un fragment de l'anticorps et permet la prévention et le traitement d'un cancer, agit sur divers cancers, est spécifique au cancer et ne produit pas d'effets secondaires.

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