Cell lines for the propagation of mutated herpes viruses

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 15/86 (2006.01) A61K 48/00 (2006.01) C12N 5/10 (2006.01) C12N 15/869 (2006.01)

Patent

CA 2336592

A process for propagating a mutant herpes virus having a mutation in its endogenous HSV VP16 gene or a homologue thereof, which process comprises infecting a cell line with the mutant herpes virus and culturing the cell line, wherein the cell line comprises a nucleic acid sequence encoding a functional herpes simplex virus (HSV) VP16 polypeptide, or a homologue thereof, operably linked to a control sequence permitting expression of the polypeptide in said cell line; the nucleic acid sequence being (i) capable of complementing the endogenous gene and (ii) unable to undergo homologous recombination with the endogenous gene. In addition, the present invention provides cell lines which can be used for the growth of mutant herpes viruses which have defects in certain immediate early genes together with mutations in VP16 or homologue thereof.

L'invention concerne un procédé destiné à la propagation d'un herpèsvirus mutant comportant une mutation dans son gène endogène HSV VP 16 ou d'un homologue de celui-ci, ledit procédé consistant à infecter une lignée cellulaire avec l'herpèsvirus mutant et à cultiver ladite lignée cellulaire, cette dernière comprenant une séquence d'acides nucléiques codant pour un polypeptide fonctionnel du virus herpès simplex HSV VP 16 ou d'un homologue de celui-ci, lié de manière fonctionnelle à une séquence de commande permettant l'expression du polypeptide dans cette lignée cellulaire. L'acide nucléique est (1) capable de complémenter le gène endogène et (2) incapable de subir une recombinaison homologue avec le gène endogène. En outre, l'invention concerne des lignées cellulaires qui peuvent être utilisées pour faire croître des herpèsvirus mutants comportant des défauts dans certains gènes précoces immédiats de même que des mutations dans VP 16 ou leurs homologues.

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