Antigen presenting cells, method for their preparation and...

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 5/10 (2006.01) C12N 5/078 (2010.01) C12N 5/0781 (2010.01) A61K 35/14 (2006.01) A61K 39/00 (2006.01)

Patent

CA 2453522

The present invention discloses a method of generation of antigen presenting cells, comprising: a. collecting said cells from a subject, b. activating said collected cells; c. culturing and optionally expanding ex vivo said activated cells; d. treating said cultured and optionally expanded cells with DNA hypomethylating agents so that said cells concomitantly express multiple tumor associated antigens. The cells obtainable according to the method of the present invention, as well as the cellular components thereof whether alone or in combination with said cells, are useful for prevention and treatment of malignancies of different histotype that constitutively express one or more of the multiple tumor associated antigens that are expressed in said cells. Conveniently, said cells and/or cellular components are in the form of a vaccine. Said vaccines are advantageous over the prior art in that as they concomitantly express multiple/all methylation-regulated tumor associated antigens.

La présente invention concerne un procédé de production de cellules présentatrices d'antigènes, consistant à collecter ces cellules auprès d'un sujet, à activer les cellules collectées, à cultiver et, éventuellement, à développer ex vivo les cellules activées, à traiter les cellules cultivées et éventuellement développées avec des agents d'hypométhylation de l'ADN de sorte que ces cellules expriment en même temps plusieurs antigènes associés à des tumeurs. Les cellules obtenues selon ce procédé, de même que leurs composants cellulaires, seuls ou en combinaison avec lesdites cellules, sont utiles pour prévenir et traiter des tumeurs malignes de différents histotypes exprimant de façon constitutive un ou plusieurs des antigènes associés à des tumeurs qui sont exprimés dans lesdites cellules. Ces cellules et/ou composants cellulaires se présentent avantageusement sous la forme d'un vaccin. Par rapport aux vaccins élaborés selon la technique antérieure, ces vaccins présentent l'avantage d'exprimer en même temps plusieurs antigènes associés à des tumeurs régulés par méthylation, voire la totalité de ceux-ci.

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