Nucleic acid constructs for gene expression

C - Chemistry – Metallurgy – 12 – N

Patent

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C12N 15/86 (2006.01) C12N 15/869 (2006.01) C12N 15/87 (2006.01)

Patent

CA 2500270

Nucleic acid constructs comprising viral genomic nucleic acid which comprises at least two endogenous gene expression regulatory units which each comprise an endogenous promoter where the endogenous promoters of the units are active at the same phase in the viral life cycle of the virus the viral genomic nucleic acid is derived from are provided. The endogenous gene expression regulatory units are used to express particular chosen heterologous coding sequences and in particular to express heterologous antigens. The constructs can be used in a vaccine to generate an immune response against the heterologous antigens and in particular may be used in a DNA vaccine. Methods for generating the constructs and means for their administration are also provided.

L'invention concerne des constructions d'acide nucléique comprenant un acide nucléique génomique viral qui comprend au moins deux unités régulatrices de l'expression génétique endogène. Chacune desdites unités régulatrices comprend un promoteur endogène où les promoteurs endogènes des unités sont actifs à la même phase dans le cycle de vie viral du virus dont l'acide nucléique génomique viral est dérivé. Les unités régulatrices de l'expression génétique endogène sont utilisées pour exprimer des séquences de codage hétérologues choisies particulières et notamment des antigènes hétérologues. Les constructions peuvent être utilisées dans un vaccin pour générer une réponse immunitaire contre les antigènes hétérologues, et notamment dans un vaccin d'ADN. Des procédés de génération des constructions et des moyens permettant leur administration sont également décrits.

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