Influenza immunogen and vaccine

A - Human Necessities – 61 – K

Patent

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Details

A61K 39/145 (2006.01) A61K 39/00 (2006.01) A61K 39/29 (2006.01) A61K 39/295 (2006.01) A61K 39/385 (2006.01) C07K 14/02 (2006.01) C07K 14/11 (2006.01) C07K 17/00 (2006.01)

Patent

CA 2549104

A chimeric, carboxy-terminal truncated hepatitis B virus nucleocapsid (HBc) protein is disclosed that contains an immunogen for inducing the production of antibodies to the influenza M2 protein. An immunogenic influenza sequence in two to four copies is preferably expressed at or near the N-terminus or in the HBc immunogenic loop sequence. The HBc chimer preferably contains an influenza~specific T cell epitope and is preferably engineered for both enhanced stability of self-assembled particles and enhanced yield of those chimeric particles. Methods of making and using the chimers are also disclosed.

L'invention concerne une protéine de la nucléocapside du virus de l'hépatite B (HBc) tronquée et chimérique, ayant extrémité carboxylique. Cette protéine contient un immunogène permettant d'induire la production d'anticorps dans la protéine M2 de la grippe. Une séquence immunogénique de la grippe dans deux à quatre copies est, de préférence, exprimée au niveau ou à proximité de la séquence N-terminale ou dans la séquence de boucle immunogénique HBc. Le chimère HBc contient, de préférence, un épitope de lymphocyte T spécifique à la grippe et est, de préférence, modifié à la fois pour une meilleure stabilité des particules auto-assemblées et un meilleur rendement de ces particules chimériques. L'invention concerne enfin des procédés de production et d'utilisation de ces chimères.

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