Highly reproducible agglutination immunoassay method and...

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G01N 33/543 (2006.01) G01N 33/545 (2006.01)

Patent

CA 2420770

A highly reproducible agglutination immunoassay method wherein the agglutination of insoluble carrier particles (latex, etc.) is stabilized and uniformized and immunoassay reagents to be used therein. In an agglutination immunoassay method comprising bonding an antigenic substance in a test sample to insoluble carrier particles, to which neither an antigen nor an antibody is substantially bonded, and then bonding an antibody or an antibody complex specifically reacting with the antigenic substance thereto to thereby selectively agglutinate the insoluble carrier particles, use is made of a polymer formed by homopolymerizing a monomer having phosphorylcholine and vinyl groups (for example, 2-methacryloyloxyethylphosphorylcholine) or copolymerizing such a monomer having phosphorylcholine and vinyl groups with another monomer having vinyl group (for example, n-butyl methacrylate).

L'invention concerne une méthode d'immunoessai d'agglutination fortement reproductible, au cours de laquelle on stabilise et uniformise l'agglutination de particules porteuses insolubles (latex, etc.), et des réactifs correspondants. Dans une méthode d'immunoessai d'agglutination consistant à lier une susbtance antigénique d'un échantilon d'essai à des particules porteuses insolubles, auxquelles n'est pas lié un antigène ou un anticorps, et puis à lier un complexe d'anticorps ou un anticorps réagissant spécifiquement à la substance antigénique pour agglutiner de manière sélective lesdites particules, on utilise un polymère formé par homopolymérisation d'un monomère pourvu de groupes vinyle et phosphorylcholine (par exemple 2-méthacryloyloxyéthylphosphorylcholine) ou par copolymérisation d'un tel monomère doté de groupes vinyle et phosphorylcholine avec un autre monomère pourvu du groupe vinyle (par exemple, m-butylméthacrylate).

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