Anti-cd3 and antigen-specific immunotherapy to treat...

A - Human Necessities – 61 – K

Patent

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A61K 39/00 (2006.01)

Patent

CA 2554978

The invention provides methods for treating autoimmunity and for reestablishing tolerance. The methods involve the coadministration of anti-CD3 antibodies and self-antigens. The coadministration has the potential to provide a synergistic effect of protecting or reducing autoaggressive immune processes and/or of reestablishing tolerance towards self-antigens. An underlying rationale behind the methods is that the administration of self- antigens together with anti-CD3 antibodies can alter the response to those self-antigens and prevent progression of autoimmunity. By rechallenging with the autoantigens and stimulating the non-pathogenic response, the blockade of the autoimmune process can be maintained. Preclinical evidence provided herein shows that the combination of anti-CD3 and autoantigen is synergistic in reversing autoimmune diabetes, and therefore, suggests that combination therapy of anti-CD3 and self-antigen may provide synergistic protection in reversing other autoimmune disorders.

L'invention concerne des méthodes de traitement de l'auto-immunité et de rétablissement de la tolérance. Ces méthodes consistent à coadministrer des auto-antigènes et des anticorps anti-CD3. La coadministration permet d'induire un effet synergique de protection ou de réduction des processus d'immunité auto-agressifs et/ou de rétablissement de la tolérance aux auto-antigènes. Une des raisons d'être sous-jacentes de ces méthodes est que l'administration d'auto-antigènes conjointement avec des anticorps anti-CD3 peut modifier la réponse de ces auto-antigènes et empêcher la progression de l'auto-immunité. Par la re-provocation à l'aide des auto-antigènes et la simulation de la réponse non pathogène, le blocage du processus d'auto-immunité peut être maintenu. Les données précliniques fournies ici montrent que la combinaison d'anti-CD3 et d'auto-antigène est synergique dans l'inversion du diabète auto-immun, et donnent à penser que la thérapie combinée d'un anti-CD3 et d'un auto-antigène peut fournir une protection synergique dans l'inversion d'autres troubles auto-immuns.

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