Polypeptide-vaccines for broad protection against...

A - Human Necessities – 61 – K

Patent

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Details

A61K 39/095 (2006.01) A61P 31/04 (2006.01) C07K 14/22 (2006.01)

Patent

CA 2501812

A small number of defined antigens can provide broad protection against meningococcal infection, and the invention provides a composition which, after administration to a subject, is able to induce an antibody response in that subject, wherein the antibody response is bactericidal against two or three of hypervirulent lineages A4, ET 5 and lineage 3 of N.meningitidis serogroup B. Rather than consisting of a single antigen, the composition comprises a mixture of 10 or fewer purified antigens, and should not include complex or undefined mixtures of antigens such as outer membrane vesicles. Five protein antigens are used in particular: (1) a ~NadA~ protein; (2) a ~741~ protein; (3) a ~936~ protein; (4) a ~953~ protein; and (5) a ~287~ protein.

Un petit nombre d'antigènes définis permettent d'offrir une large protection contre l'infection à méningocoque. L'invention concerne une composition qui, après avoir été administrée à un sujet, est capable d'induire une réponse des anticorps chez ce sujet, la réponse des anticorps étant bactéricide contre deux ou trois des lignées hypervirulentes A4, ET5 et contre la lignée 3 de N.meningitidis du sérogroupe B. La composition, plutôt que de renfermer un seul antigène, comprend un mélange de 10 antigènes purifiés au maximum, et ne devrait pas comprendre de mélanges complexes ou non définis d'antigènes tels que les vésicules membranaires externes. Dans l'invention, cinq antigènes protéiniques sont utilisés en particulier: (1) une protéine "NadA"; (2) une protéine "741"; (3) une protéine "936"; (4) une protéine "953"; et (5) une protéine "287".

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