Method for conducting chemiluminescent binding assay

G - Physics – 01 – N

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G01N 33/533 (2006.01) G01N 33/543 (2006.01) G01N 33/558 (2006.01) G01N 33/58 (2006.01)

Patent

CA 2375263

A method for conducting a receptor-ligand binding reaction of a solution containing or suspected of containing the target analyte. The method comprises the steps of bonding the first binding partner to the surface of a paramagnetic particle, conjugating a second binding partner to a calcium- sensitive luminescent compound; contacting the first and second binding partners with the solution to be tested, immobilizing the paramagnetic particles along a capture strip that has a transverse stripe containing streptavidin and containing a caged calcium compound, exposing the transverse stripe to a pulse of ultraviolet light to effect the release of calcium from the caged calcium compound, and measuring luminescence emitted by the calcium- sensitive luminescent material. The method may be used in the testing of blood. An apparatus is also disclosed.

L'invention concerne un procédé permettant d'effectuer une réaction de liaison à un ligand récepteur d'une solution contenant, ou supposée contenir, l'analyte cible. Le procédé est caractérisé en ce qu'il comprend les étapes suivantes: lier le premier partenaire de liaison à la surface d'une particule paramagnétique; conjuguer un second partenaire de liaison à un composé luminescent sensible au calcium; mettre en contact le premier et le second partenaires de liaison avec la solution à tester, immobiliser les particules le long d'une bande de capture présentant une raie transversale contenant de la streptavidine ainsi qu'un composé de calcium de type en cage, exposer la raie transversale à une impulsion d'une lumière ultraviolette afin de libérer le calcium dudit composé de calcium en cage, et mesurer la luminescence émise par le matériau luminescent sensible au calcium. Le procédé peut être utilisé pour des essais sur le sang. L'invention concerne en outre un appareil y relatif.

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