Novel vaccines against multiple subtypes of influenza virus

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 15/85 (2006.01) A61K 39/145 (2006.01) A61P 31/16 (2006.01) C12N 15/44 (2006.01)

Patent

CA 2705461

An aspect of the present invention is directed towards DNA plasmid vaccines capable of generating in a mammal an immune response against a plurality of influenza virus subtypes, comprising a DNA plasmid and a pharmaceutically acceptable excipient. The DNA plasmid is capable of expressing a consensus influenza antigen in a cell of the mammal in a quantity effective to elicit an immune response in the mammal, wherein the consensus influenza antigen comprises consensus hemagglutinin (HA), neuraminidase (NA), matrix protein, nucleoprotein, M2 ectodomain-nucleo- protein (M2e-NP), or a combination thereof. Preferably the consensus influenza antigen comprises HA, NA, M2e-NP, or a combination thereof. The DNA plasmid comprises a promoter operably linked to a coding sequence that encodes the consensus influenza antigen. Additionally, an aspect of the present invention includes methods of eliciting an immune response against a plurality of influenza virus subtypes in a mammal using the DNA plasmid vaccines provided.

La présente invention concerne des vaccins à ADN plasmidique capables de provoquer chez un mammifère une réponse immunitaire pour lutter contre plusieurs sous-types de virus de la grippe, lesquels vaccins comprennent de l'ADN plasmidique et un excipient pharmaceutiquement acceptable. L'ADN plasmidique peut exprimer un antigène de la grippe consensus dans une cellule du mammifère, dans une quantité assez efficace pour obtenir une réponse immunitaire chez le mammifère. L'antigène de la grippe consensus comprend de l'hémagglutinine (HA) consensus, de la neuraminidase (NA), une protéine matricielle, une nucléoprotéine, une nucléoprotéine d'ectodomaine M2 (M2e-NP) ou une combinaison de ceux-ci. L'antigène de la grippe consensus comprend de préférence HA, NA, M2e-NP ou une combinaison de ceux-ci. L'ADN plasmidique comprend un promoteur qui est lié de façon fonctionnelle à une séquence de codage qui code l'antigène de la grippe consensus. Un aspect de l'invention concerne des procédés permettant de provoquer chez un mammifère une réponse immunitaire pour lutter contre plusieurs sous-types de virus de la grippe, au moyen desdits vaccins à ADN plasmidique.

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