Synergistic induction of humoral and cellular immunity by...

A - Human Necessities – 61 – K

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Details

A61K 9/16 (2006.01) A61K 39/145 (2006.01) A61K 39/29 (2006.01) A61K 47/34 (2006.01) A61P 35/00 (2006.01) A61P 37/00 (2006.01)

Patent

CA 2729775

Described herein are compositions that include a selected antigen, a TLR4 ligand and a TLR7/TLR8 ligand, wherein the antigen and TLR ligands are encapsulated in nanoparticles. Co- administration of both a TLR4 ligand and a TLR7/TLR8 ligand results in the synergistic induction of humor and cellular immunity as evidenced by an increase in pro-inflammatory cytokine production, an increase in the number of CD8+ T effector and T memory cells, an increase in titer of antigen-specific antibodies, an increase in antibody affinity, an increase in the proliferation of naive B cells and/or a significant enhancement in the persistence of antibody and T cell responses. The compositions and methods provided herein can be used to stimulate an immune response such as an immune response to a pathogen or a tumor.

La présente invention concerne des compositions qui comprennent un antigène choisi, un ligand de TLR4 et un ligand de TLR7/TLR8, lantigène et les ligands de TLR étant encapsulés dans des nanoparticules. La co-administration dun ligand de TLR4 et dun ligand de TLR7/TLR8 résulte en linduction synergique de limmunité humorale et cellulaire telle que mise en évidence par une augmentation de la production de cytokines pro-inflammatoires, une augmentation du nombre de cellules CD8+ T effectrices et T mémoires, une augmentation du titre danticorps spécifiques des antigènes, une augmentation de laffinité des anticorps, une augmentation de la prolifération des cellules B naïves et/ou une amélioration significative de la persistance des anticorps et des réponses des cellules T. Les compositions et les procédés proposés par la présente invention peuvent être utilisés pour stimuler une réponse immunitaire telle quune réponse immunitaire à un agent pathogène ou à une tumeur.

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