Recombinant vaccines comprising immunogenic attenuated...

A - Human Necessities – 61 – K

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A61K 48/00 (2006.01) A61K 38/17 (2006.01) A61K 38/19 (2006.01) A61K 39/112 (2006.01) A61K 39/12 (2006.01) A61K 39/29 (2006.01) A61K 39/35 (2006.01) C12N 1/22 (2006.01)

Patent

CA 2309925

Attenuated immunogenic bacteria having an RpoS+ phenotype, in particular, Salmonella enterica serotype Typhi having an RpoS+ phenotype and methods therefor are disclosed. The Salmonella have in addition to an RpoS+ phenotype an inactivating mutation in one or more genes which render the microbe attenuated, and a recombinant gene capable of expressing a desired protein. The Salmonella are attenuated and have high immunogenicity so that they can be used in vaccines and as delivery vehicles for genes and gene products. Also disclosed are methods for preparing the vaccine delivery vehicles.

L'invention concerne des bactéries immunogènes atténuées ayant un phénotype RpoS?+¿, en particulier la Salmonella enterica de sérotype Typhi à phénotype RpoS?+¿, ainsi que des procédés associés. Les salmonelles présentent, outre un phénotype RpoS?+¿, une mutation inactivante dans un ou plusieurs gènes, ce qui rend le microbe atténué, ainsi qu'un gène de recombinaison capable d'exprimer une protéine voulue. Les salmonelles, qui sont atténuées, présentent une immunogénicité élevée, si bien qu'elles peuvent être utilisées dans des vaccins ou comme véhicules d'apport de gènes et de produits géniques. L'invention concerne également des procédés de préparation des véhicules d'apport de vaccins.

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