Method of antigen incorporation into neisseria bacterial...

C - Chemistry – Metallurgy – 07 – K

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C07K 14/22 (2006.01) A61K 39/00 (2006.01)

Patent

CA 2543206

Method for the insertion or protein antigens, of recombinant or synthetic origin, in outer membrane vesicles of Gram-negative bacteria belonging to the Neisseri aceae family without disruption of the vesicle structure, therefore maintaining the immunogenicity and immunostimulatory properties of said vesicles, and with the reported advantage that the immune response generated against the incorporated antigen is superior to the one generated when the antigen is administered alone. The resultant vaccine formulations are useful to increase protective capacity of existing vaccines and allow to extend it against different pathogens, in diseases of bacterial, viral, cancerous or other etiology. The referred formulations are applicable in the pharmaceutical industry as vaccines for therapeutic and preventive use in human.

L'invention concerne une méthode permettant d'introduire des antigènes protéiques, de synthèse ou recombinés, dans des vésicules de la membrane externe de bactéries gram-négatives appartenant à la famille Neisseri aceae, sans modifier la structure vésiculaire, ce qui permet, d'une part, de maintenir l'immunogénécité et les propriétés immunostimulantes desdites vésicules et, d'autre part, d'augmenter la réponse immune produite contre l'antigène introduit par rapport à celle produite lorsque l'antigène est administré seul. Les préparations vaccinales résultantes permettent d'augmenter le pouvoir protecteur des vaccins actuels et de l'étendre à différents agents pathogènes et à diverses maladies d'étiologie bactérienne, virale, cancéreuse ou autre. Ces préparations s'appliquent à l'industrie pharmaceutique et plus précisément à des vaccins à usage thérapeutique et préventif chez les humains.

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