Sars vaccines and methods to produce highly potent antibodies

A - Human Necessities – 61 – K

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A61K 39/215 (2006.01)

Patent

CA 2569142

This invention provides a vaccine comprising an effective amount of an isolated polypeptide or recombinant protein containing the sequence of the receptor-binding domain in the SARS associated coronavirus spike protein or a functional fragment thereof, or a nucleic acid molecule comprising the sequence of a fragment which encodes the sequence of the receptor-binding domain in the Severe Acute Respiratory Syndrome associated coronavirus spike protein or a functional fragment thereof. This invention provides a composition for increasing the immunogenicity of an antigen comprising an effective amount of an antigen and an IgG Fc domain, its functional fragment, or a substance containing an IgG Fc domain or its functional fragment. The antigen and the IgG Fc may be linked or unlinked. Finally, this invention also provides method for using any of the above compositions for immunization.

L'invention porte sur un vaccin comportant une dose efficace d'un polypeptide isolé ou d'une protéine de recombinaison contenant la séquence du domaine de fixation au récepteur de la protéine de spicule associée au SARS, ou l'un de ses fragments fonctionnels, ou une molécule d'acide nucléique comportant la séquence d'un fragment codant pour la séquence du domaine de fixation au récepteur de la protéine de spicule associée au SARS ou l'un de ses fragments fonctionnels. L'invention porte également sur une composition accroissant immunogénicité d'un antigène comprenant une quantité efficace d'un antigène et le domaine Fc de l'IgG, un de ses fragments fonctionnels ou une substance contenant le domaine Fc de l'IgG ou l'un de ses fragments fonctionnels, l'antigène et le domaine Fc de l'IgG pouvant être liés ou non. L'invention porte en outre sur des méthodes d'utilisation de l'une des compositions ci-dessus à des fins d'immunisation.

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