Construction and use of genes encoding pathogenic epitopes...

C - Chemistry – Metallurgy – 12 – N

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C12N 5/10 (2006.01) A61K 31/70 (2006.01) A61K 35/12 (2006.01) A61K 48/00 (2006.01) C07K 14/47 (2006.01) C07K 14/705 (2006.01) A61K 38/00 (2006.01)

Patent

CA 2256577

The present invention relates to the application of genetic engineering to provide a treatment of autoimmune disease. This is achieved preferably through the introduction of one or more recombinant genes encoding self antigens which are the target of an autoimmune response. In particular the invention provides a method of designing and constructing a gene encoding an encephalitogenic epitope of proteolipid protein, and to the in vivo expression of the gene product by a recombinant retroviral vector. The expression and secretion of the encephalitogenic epitope ameliorates the histophathological and clinical characteristics of experimental autoimmune encephalomyelitis (EAE) in the mouse model for multiple sclerosis (MS).

L'invention concerne l'application de la manipulation genétique pour traiter une maladie autoimmune. Ceci est obtenu de préférence par introduction d'un ou de plusieurs gènes recombinants codant des auto-antigènes qui sont la cible d'une réponse autoimmune. En particulier, l'invention décrit un procédé de conception et de construction d'un gène codant un épitope encéphalitogénique d'une protéine protéolipide, et elle concerne l'expression in vivo du produit gène par un vecteur rétroviral recombinant. L'expression et la sécrétion de l'épitope encéphalitogénique permettent d'améliorer les caractéristiques histopathologiques et cliniques de l'encéphalomyélite autoimmune expérimentale (EAE) chez un modèle souris pour la sclérose en plaques.

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