Methods for generating cytotoxic t cells in vitro

A - Human Necessities – 61 – K

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A61K 39/00 (2006.01) A61K 45/00 (2006.01) C12N 5/06 (2006.01) C12N 5/08 (2006.01)

Patent

CA 2269090

The present invention provides methods for generating antigen-reative cytotoxic T cells in vitro comprising culturing immune cells and antigenic cells that have at least one MHC allele in common (and preferably, are syngeneic), in which the antigenic cells have been treated according to the methods of the invention. The antigenic cells are treated by subjecting them to osmotic shock followed by irradiation. As a result, a subset of T cells are activated and mature into antigen-reactive cytotoxic T cells. The effectiveness of the procedure may be enhanced by repeated restimulations and/or the addition of heat shock protein-peptide complexes. Methods and compositions are also disclosed for the treatment and prevention in a subject of cancer or infectious disease comprising administering to the subject matched cytotoxic T cells that are generated in vitro by the present methods.

L'invention concerne des procédés servant à générer in vitro des lymphocytes T cytotoxiques présentant une réactivité aux antigènes, ce qui consiste à effectuer la culture de cellules immunes et de cellules antigéniques possédant au moins en commun un allèle de MHC (et étant, de préférence, syngéniques), les cellules antigéniques ayant été traitées selon ces procédés. On traite les cellules antigéniques en les soumettant à un choc osmotique suivi par une irradiation. De ce fait, un sous-ensemble de lymphocytes T est activé et arrive à maturité en tant que lymphocytes T cytotoxiques présentant une réactivité aux antigènes. On peut améliorer l'efficacité du procédé, soit au moyen de restimulations répétées, soit par apport de complexes de choc thermique constitués par des protéines et par des peptides. L'invention concerne également des procédés et des compositions servant au traitement et à la prévention du cancer ou de maladies infectieuses, ce qui consiste à administrer à l'individu atteint de l'une ou de l'autre de ces maladies des lymphocytes T cytotoxiques appariés, générés in vitro au moyen de ces procédés.

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