A polynucleotide herpes virus vaccine

C - Chemistry – Metallurgy – 12 – N

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C12N 15/38 (2006.01) A61K 31/70 (2006.01) A61K 39/245 (2006.01) A61K 48/00 (2006.01) C07K 14/035 (2006.01) C12N 15/19 (2006.01)

Patent

CA 2195099

Genes encoding herpes simplex virus type 2 (HSV-2) proteins were cloned into eukaryotic expression vectors to express the encoded proteins in mammalian muscle cells in vivo. Animals were immunized by injection of these DNA constructs, termed polynucleotide vaccines or PNV, into their muscles. In a DNA titration, it was found that a single immunization of >= 0.5 µg of (one) PNV, gave > 90 % seroconversion by ten weeks post immunization. Immune antisera neutralized both HSV-2 and HSV-1 in cell culture. When animals were challenged with HSV-2, significant (p < .001) protection from lethal infection was achieved following PNV vaccination.

On a cloné des gènes codant les protéines du virus du type 2 de l'herpès (VHS-2) dans des vecteurs d'expression eucaryotiques, pour exprimer les protéines codées dans des cellules musculaires de mammifères in vivo. Des animaux ont été immunisés par l'injection dans leurs muscles de ces produits de recombinaison d'ADN, dénommés vaccins polynucléotidiques (VPN). Un titrage d'ADN a montré qu'une seule immunisation avec >= 0,5 µg de (un) VPN aboutit à une séroconversion supérieure à 90 %, dix semaines après l'immunisation. Des immun-antisérums ont neutralisé aussi bien le VHS-2 que le VHS-1 en culture cellulaire. Lorsqu'on a administré un VHS-2 à des animaux, on a observé une protection significative (p < 0,001) contre une infection létale, après la vaccination avec le VPN.

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