Dna vaccine for cancer therapy

A - Human Necessities – 61 – K

Patent

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Details

A61K 39/00 (2006.01) A61P 35/00 (2006.01) C12N 15/62 (2006.01)

Patent

CA 2633346

The invention relates to a fusion gene useful as a therapeutic and prophylactic vaccine against cancer. The fusion gene contains a DNA encoding ubiquitin gene fused to a second DNA encoding growth factor receptors or fragment thereof, over expressed in various types of cancer. In particular, the invention is illustrated by a recombinant fusion gene comprised of mutated ubiquitin gene and modified extra cellular domain of vasoactive intestinal peptide/ pituitary adenylate cyclase activating polypeptide receptor-1 (VPACl). Immunization with the vaccine will break the self- tolerance for the tumor antigen through effective antigen processing and presentation, leading to retardation/ regression of tumor growth.

La présente invention concerne un gène de fusion pouvant être employé en tant que vaccin prophylactique et thérapeutique contre le cancer. Le gène de fusion contient un ADN codant pour l~ubiquitine fusionné à un ADN codant pour des récepteurs de facteurs de croissance ou un fragment desdits récepteurs, surexprimés dans divers types de cancers. En particulier, l'invention est illustrée par un gène de fusion recombinant constitué d'un gène muté d~ubiquitine et d'un domaine extracellulaire modifié de récepteur de polypeptide activant l'adénylate cyclase pituitaire 1 (VPAC1)/de peptide intestinal vasoactif. L'immunisation par le vaccin annule l'auto-tolérance vis-à-vis de l'antigène de la tumeur par le biais d'un traitement et d'une présentation efficaces de l'antigène, ce qui entraîne le retard/la régression de la croissance tumorale.

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