Inhibition of dendritic cell-driven regulatory t cell...

A - Human Necessities – 61 – K

Patent

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A61K 35/14 (2006.01) A61K 38/00 (2006.01) A61K 38/20 (2006.01)

Patent

CA 2700618

The invention involves the discovery that if dendritic cells loaded with a tumor antigen are cultured in interleukin-15 (IL- 15), or if T cells activated by the dendritic cells are cultured in IL- 15, Treg activity that is specific for the tumor antigen is reduced. This reduction in Treg activity results in an increase in anti-tumor immune response. Another embodiment of the invention involves the discovery that incubating dendritic cells with a MAP kinase inhibitor in combination with IL-15 gives synergistic benefits when the dendritic cells are used to activate T cells. Dendritic cell and 1 cell compositions incubated with IL-15 or a MAP kinase inhibitor are provided.

L'invention implique la découverte du fait que si des cellules dendritiques chargées par un antigène de tumeur sont mises en culture dans de l'interleukine-15 (IL-15), ou si des lymphocytes T activés par les cellules dendritiques sont mis en culture dans de l'IL-15, l'activité Treg qui est spécifique pour l'antigène de tumeur est réduite. Cette réduction de l'activité Treg a pour résultat une augmentation de la réponse immunitaire anti-tumorale. Un autre mode de réalisation de l'invention implique la découverte du fait que l'incubation de cellules dendritiques avec un inhibiteur de la kinase MAP en combinaison avec IL-15 donne des effets bénéfiques synergiques lorsque les cellules dendritiques sont utilisées pour activer les lymphocytes T. L'invention propose des compositions de cellules dendritiques et de lymphocytes T incubées par IL-15 ou un inhibiteur de la kinase MAP.

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