Modified free-living microbes, vaccine compositions and...

A - Human Necessities – 61 – K

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A61K 39/04 (2006.01) A61K 39/02 (2006.01) A61K 39/07 (2006.01) A61P 31/00 (2006.01) C12N 1/21 (2006.01) C12N 15/00 (2006.01)

Patent

CA 2515298

Free-living microbes are provided in which the nucleic acid has been modified so that the attenuated for proliferation and/or which comprise genetic mutations that attenuate the ability of the microbe to repair its nucleic acid. Methods of using the modified microbes for the loading, activation, and/or maturation of antigen-presenting cells are also provided. Vaccine compositions comprising the modified microbes and/or the antigen-presenting cells and methods of using the vaccines are also provided. The microbes may be further modified to include heterologous antigens, such as tumor antigens or infectious disease antigens, for use as a vaccine against cancer or infections diseases.

La présente invention concerne des microbes vivant en milieu naturel dans lesquels l'acide nucléique a été modifié de façon que le microbe soit atténué pour prolifération et/ou qui comprend des mutations génétiques qui atténuent l'aptitude du microbe à réparer son acide nucléique. L'invention concerne également des procédés d'utilisation des microbes modifiés pour le chargement, l'activation, et/ou la maturation de cellules présentant des antigènes. De même, l'invention comprend, d'une part des compositions de vaccins comprenant les microbes modifiés et/ou les cellules présentant des antigènes, et d'autre part des procédés d'utilisation des vaccins. Ces microbes peuvent être encore plus modifiés pour inclure des antigènes hétérologues, tels que des antigènes de tumeurs ou des antigènes de maladies infectieuses, pour servir de vaccin contre le cancer ou des maladies infectieuses.

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