Protein nmb1125 and use thereof in pharmaceutical formulations

C - Chemistry – Metallurgy – 07 – K

Patent

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Details

C07K 14/22 (2006.01) A61K 39/095 (2006.01) A61K 48/00 (2006.01) C12N 1/21 (2006.01) C12N 15/31 (2006.01) C12Q 1/68 (2006.01) G01N 33/569 (2006.01)

Patent

CA 2547317

The invention relates to the use of a novel vaccine antigen which is used preventively or therapeutically against diseases of bacterial, viral, cancerous or other origin. The technical aim of the invention is to develop formulations that can increase the protective spectrum of existing vaccines and extend same against different pathogens. For said purpose, protein NMB1125 was isolated and identified as a component of Neisseria meningitidis outer membrane preparations, which can induce bactericide activity. In addition, the gene coding for protein NMB1125 was cloned and expressed, said protein being purified, and the immunogenicity thereof in animal biomodels was subsequently evaluated. The high conservation level of the sequencing of homologous genes demonstrated the high value thereof as an antigen that induces a cross immune response when presented in different ways. The resulting formulations are suitable for use in the pharmaceutical industry as vaccine formulations for human use.

L'invention concerne une protéine NMB1125 et son utilisation dans les formulations pharmaceutiques et l'utilisation d'un nouveau antigène vaccinal appliqué de manière préventive ou thérapeutique contre les maladies bactériennes, virales, cancéreuses ou de toute autre origine. L'objectif technique recherché est la mise au point de formulations aptes à élever le spectre protecteur des vaccins déjà existants et à l'étendre contre les différents pathogènes. Afin d'atteindre cet objectif, on a isolé, identifié la protéine NMB1125 comme composant des préparations de membranes externes de <i>Neisseria meningitidis</i>, apte à induire l'activité bactéricide. Par ailleurs, on a cloné et exprimé le gène codant pour la protéine NMB1125, laquelle a été purifiée. On a ensuite évalué son immunogénicité en biomodèles animaux. Le séquençage de gènes homologues a mis en évidence, de par son niveau élevé de conservation, sa fonction comme antigène inducteur d'une réponse immune croisée lorsqu'il est présenté par des voies différentes. Les formulations obtenues de cette invention trouvent une application dans l'industrie pharmaceutique sous forme de formulations vaccinales à usage humain.

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