Self-actuating signal producing detection devices and methods

C - Chemistry – Metallurgy – 12 – Q

Patent

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Details

C12Q 1/00 (2006.01) C12M 1/34 (2006.01) C12Q 1/32 (2006.01) G01N 33/53 (2006.01) G01N 33/66 (2006.01) G01V 3/12 (2006.01)

Patent

CA 2699315

An assay system is provided of great sensitivity and portability where the presence of a specific target in a sample, as well as its concentration (qualification and quantification) is detected by reason of a potential or voltage in a closed circuit, built up a redox reaction. The reaction is produced by binding a capture moiety to an enzymatic redox reaction partner, allowing the capture moiety to bind to any target in the sample, and washing any such bound target. The bound target, if not immobilized, may be immobilized through use of a second capture moiety. Substrate for the enzyme is then added. The action of the enzyme upon the substrate frees electrons, creating a potential across an anode and cathode which may be separated by a membrane.

La présente invention concerne un système d'analyse de haute sensibilité et grande portabilité où la présence d'une cible spécifique dans un échantillon, ainsi que sa concentration (qualification et quantification) sont détectées en raison d'un potentiel ou d'une tension en circuit fermé conduisant à une réaction d'oxydo-réduction. La réaction est conduite en liant un groupement de capture avec un partenaire redox enzymatique, ce qui permet au groupement de capture de se lier à n'importe quelle cible dans l'échantillon, et en lavant toute cible liée. La cible liée peut être immobilisée, si elle ne l'est pas, grâce à l'utilisation d'un second groupement de capture. Le substrat de l'enzyme est alors ajouté. L'action de l'enzyme sur le substrat libère des électrons, ce qui crée un potentiel dans une anode et une cathode qui peuvent être séparées par une membrane.

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