Methods and devices for immunizing a host to...

A - Human Necessities – 61 – K

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Details

A61K 31/70 (2006.01) A61K 39/00 (2006.01) A61K 48/00 (2006.01) A61M 5/00 (2006.01) G01N 33/569 (2006.01) G01N 33/68 (2006.01)

Patent

CA 2203991

The invention is directed to methods for introducing biologically active peptides into a host administration of polynucleotides which operatively encode for the peptide of interest. In a preferred embodiment of the invention, a host who has been identified as having a tumor bearing at least one tumor-associated antigen is the recipient of a polynucleotide which operatively encodes for a foreign mimic of the tumor-associated antigen or a mutation of the self-antigen. The antigen-encoding polynucleotides are administered to host tissues which have a high concentration of antigen presenting cells in them relative to other host tissues. The method is particularly useful in treating cancer through induction of antigen-specific cytotoxic T lymphocytes in the host for lysis of tumor cells bearing the antigen. Devices and compositions for use in the methods of the invention are also described.

L'invention concerne des procédés d'introduction de peptides ayant une activité biologique dans un hôte, par l'administration de polynucléotides codant fonctionnellement pour lesdits peptides. Dans un mode de réalisation préféré, un hôte qui a été identifié comme présentant une tumeur portant au moins un antigène associé à cette tumeur, constitue le receveur d'un polynucléotide codant fonctionnellement pour un imitateur étranger de l'antigène associé à la tumeur ou une mutation de l'antigène endogène. Les polynucléotides codant l'antigène sont administrés à des tissus hôtes dans lesquels la concentration en cellules présentant des antigènes est plus élevée que dans d'autres tissus hôtes. Ce procédé est utile notamment pour traiter le cancer par induction dans l'hôte de lymphocytes T cytotoxiques spécifiques de l'antigène, afin de lyser des cellules tumorales portant l'antigène. L'invention concerne également des dispositifs ainsi que des compositions utiles dans les procédés de l'invention.

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