Production of tetravalent antibodies

C - Chemistry – Metallurgy – 07 – K

Patent

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Details

C07K 16/00 (2006.01) A61K 39/395 (2006.01) A61K 47/48 (2006.01) A61P 35/00 (2006.01) A61P 35/02 (2006.01) A61P 37/00 (2006.01) C07K 16/28 (2006.01) C07K 16/46 (2006.01)

Patent

CA 2359994

The present invention relates to a novel process for the preparation of biologically active antibody dimers in a pharmaceutically acceptable composition. The dimers can be composed of two antibody molecules having the same antigen binding specificity and linked through a reducible, disulfide, or a non-reducible thioether, bond (homodimer). Alternatively, the dimers can be composed of two different antibody molecules having binding specificity for two distinct antigens (heterodimer). These dimers are useful for inducing hyper-cross-linking of membrane antigens. The present invention further relates to the use of biologically active antibody dimers for the preferential killing or inhibition of selected cell populations in the treatment of diseases such as cancer and autoimmune disorders.

L'invention concerne une nouvelle technique qui permet de préparer une composition pharmaceutiquement acceptable contenant des dimères d'anticorps biologiquement actifs. Les dimères peuvent être constitués soit de deux molécules d'anticorps possédant la même spécificité de liaison d'antigène et reliées par un pont disulfure réductible ou une liaison thioéther non réductible (homodimères); soit de deux molécules anticorps différentes, possédant une spécificité de liaison pour deux antigènes distincts (hétérodimères). Ces dimères sont utiles pour induire un hyper-pontage des antigènes de membrane. L'invention concerne également l'utilisation de dimères d'anticorps biologiquement actifs pour tuer ou inhiber de manière préférentielle des populations cellulaires dans le traitement de maladies telles que le cancer et les pathologies auto-immunes.

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