Complexed polypeptide and adjuvant for improved vaccines

A - Human Necessities – 61 – K

Patent

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Details

A61K 39/00 (2006.01) A61K 39/385 (2006.01) A61K 45/00 (2006.01) A61K 47/00 (2006.01) C12Q 1/68 (2006.01)

Patent

CA 2554664

Attachment of the strongly immunogenic polypeptide to a more weakly immunogenic polypeptide can precipitate and focus a CpG adjuvant to increase in vivo priming of a cytotoxic T-lymphocyte (CTL) response, and thus increase the immunogenicity of the more weakly immunogenic polypeptide. Accordingly, compositions that include a bipartite immunogenic polypeptide are provided herein. The bipartite polypeptide can include a CpG-~interacting amino acid sequence fused to a CTL-activating amino acid sequence that can be heterologous to the CpG-interacting amino acid sequence. Also provided are methods of identifying and using a CpG-interacting amino acid sequence and a bipartite immunogenic polypeptide.

La fixation du polypeptide fortement immunogène à un polypeptide plus faiblement immunogène peut précipiter et focaliser un adjuvant CpG afin d'augmenter l'amorçage in vivo d'une réponse de lymphocyte T cytotoxique (CTL) et ainsi augmenter l'immunogénicité du polypeptide plus faiblement immunogène. Ainsi sont présentées dans cette invention des compositions contenant un polypeptide immunogène bipartite. Le polypeptide bipartite peut contenir une séquence d'acides aminés interagissant avec CpG fusionnée à une séquence d'acides aminés activant CTL pouvant être hétérologue à la séquence d'acides aminés interagissant avec CpG. L'invention concerne également des méthodes d'identification et d'utilisation d'une séquence d'acides aminés interagissant avec CpG ainsi qu'un polypeptide immunogène bipartite.

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