Humanized immunoglobulin reacting specifically with fas...

C - Chemistry – Metallurgy – 07 – K

Patent

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Details

C07K 16/46 (2006.01) C07K 14/715 (2006.01) C07K 16/24 (2006.01) C07K 16/28 (2006.01)

Patent

CA 2264968

A novel humanized immunoglobulin reacting specifically with a Fas ligand and active fragments thereof are provided and a region on a Fas ligand which is important in inhibiting apoptosis induced by cells with Fas expression on the basis of the Fas-Fas ligand interaction is clarified. The novel humanized immunoglobulin and active fragments thereof are prepared by the recombinant DNA techniques from hybridomas which produce a monoclonal antibody reacting specifically with a Fas ligand. This immunoglobulin can inhibit physiological reactions between a Fas ligand and Fas, typified by apoptosis. By specifying the region participating in the induction of apoptosis on a Fas ligand, there have been constructed recombinant proteins and peptides which react specially with the amino acids contained in this region to thereby inhibit apoptosis and are thus applicable to novel remedies, clinical diagnostic drugs, etc.

La présente invention concerne une immunoglobuline humanisée réagissant spécifiquement avec un ligand Fas et certains de ses fragments actifs. L'invention concerne également une région d'un ligand Fas particulièrement importante pour l'inhibition de l'apoptose induite par des cellules exprimant un Fas respectant les règles d'interaction entre Fas et ligand Fas. L'immunoglobuline de l'invention et ses fragments actifs sont préparés selon des techniques employant l'ADN recombinant d'hybridomes produisant un anticorps monoclonal qui réagit spécifiquement avec un ligand Fas. Cette immunoglobuline est capable d'inhiber des réactions physiologiques entre un ligand Fas et un Fas, ce qui aboutit notamment à une apoptose. En spécifiant la région du ligand Fas participant à l'induction de l'apoptose, on a réussi à construire des protéines et des peptides recombinants qui réagissent spécialement avec les acides aminés contenus dans cette région, inhibant par là-même l'apoptose, et qui conviennent notamment comme médicaments et comme agents de diagnostic clinique.

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