Membrane virus host range mutations and their uses as...

C - Chemistry – Metallurgy – 12 – N

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C12N 7/00 (2006.01) A61K 39/12 (2006.01) C07K 14/18 (2006.01) C12N 7/04 (2006.01) C12N 15/86 (2006.01) C12P 21/00 (2006.01)

Patent

CA 2302809

The vaccines and methods of the present invention are based on deletion mutations in the protein transmembrane domains of membrane-enveloped viruses. The strategy for production of these mutations is based on the fact that unlike mammalian cell membranes, the membranes of insect cells contain no cholesterol; thus are thinner than mammalian membranes. Many membrane-coated viruses have membrane glycoproteins on their surface which are responsible for identifying and infecting target cells. These membrane glycoproteins have hydrophobic membrane-spanning domains which anchor the proteins in the membrane bilayer. The membrane-spanning domains of these transmembrane proteins must be long enough to reach from one side of the bilayer to the other in order to hold the proteins in the membrane. Provided is a vaccine, a method of producing this vaccine, and a method of using this vaccine, based on the differences between membranes of viruses replicated in invertebrates and membranes of viruses replicated in vertebrates.

La présente invention concerne des vaccins et des procédés basés sur des mutations de délétion dans des domaines de protéine transmembranaire de virus enveloppés d'une membrane. La stratégie de production de ces mutations est basée sur le fait qu'à la différence des membranes cellulaires de mammifère, les membranes cellulaires d'insecte ne contiennent pas de cholestérol et sont plus minces. Beaucoup de virus revêtus de membrane présentent des glycoprotéines membranaires sur leur surface qui permettent d'identifier et d'infecter des cellules de cible. Ces glycoprotéines membranaires présentent des domaines hydrophobes recouvrant une membrane, lesquels domaines ancrent les protéines dans la membrane formée de deux couches. Les domaines recouvrant la membrane de ces protéines transmembranaires doivent être assez longs pour passer d'un côté de la membrane formée de deux couches à l'autre côté de façon à maintenir les protéines dans cette membrane. La présente invention concerne également un vaccin, un procédé de fabrication de ce vaccin, et un procédé d'utilisation de ce vaccin, basé sur les différences entre les membranes des virus reproduits chez les invertébrés et les membranes des virus reproduits chez les vertébrés.

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