Identification of protective antigenic determinants of...

A - Human Necessities – 61 – K

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A61K 39/12 (2006.01) C07K 14/08 (2006.01) C07K 16/10 (2006.01)

Patent

CA 2630648

The invention relates to a polypeptide of a protective antigenic determinant (PAD polypeptide) of porcine reproductive and respiratory syndrome virus (PRRSV) and nucleic acids encoding a PAD polypeptide. The PAD is generated by a heterodimer consisting of the GP 5 protein and the M protein of PRRSV wherein the ectodomain of GP 5 has different N-glycosylated states. The PAD polypeptide and nucleic acids encoding a PAD polypeptide are useful in the development of antibodies directed to PAD, vaccines effective in providing protection against PRRSV infection, and diagnostic assays detecting the presence of PAD antibodies generated by a PAD-specific vaccine. The invention also discloses methods of generating antibodies to PAD, for vaccinating a pig to provide protection from PRRSV infections, a method of preparing the vaccine, a method of treating PRRSV infections in a pig, and a method of detecting antibodies to PAD of PRRSV.

La présente invention a trait à un polypeptide d'un déterminant antigénique protecteur (polypeptide PAD) du virus du syndrome reproductif et respiratoire porcin (PRRSV) et d'acides nucléiques codant pour un polypeptide PAD. Le polypeptide PAD et les acides nucléiques codant pour un polypeptide PAD sont utiles dans le développement d'anticorps dirigés contre le PAD, des vaccins efficaces pour assurer la protection contre une infection PRRSV, et des dosages de diagnostic de détection de la présence d'anticorps PAD générés par un vaccin spécifique de PAD. L'invention a également trait à des procédés de génération d'anticorps au PAD, pour la vaccination d'un porc pour assurer la protection contre des infections PRRSV, à un procédé de préparation du vaccin, à un procédé pour le traitement d'infections PRRSV chez un porc, et à un procédé de détection d'anticorps au PAD de PRRSV.

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