Cationic polymer based wired enzyme formulations for use in...

C - Chemistry – Metallurgy – 12 – Q

Patent

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C12Q 1/54 (2006.01) A61B 5/1473 (2006.01) A61B 5/1486 (2006.01) C12Q 1/00 (2006.01) C12Q 1/26 (2006.01) G01N 27/327 (2006.01) G01N 27/416 (2006.01)

Patent

CA 2735893

Embodiments of the invention include analyte-responsive compositions and electrochemical analyte sensors having a sensing layer that includes an analyte-responsive enzyme and a cationic polymer. The sensing layer can beneficially further comprise a redox mediator material that assists in transferring electrons between the enzyme and an electrode. The mediator can be associated either covalently or noncovalently with the cationic polymer, which, in turn, is disposed in close proximity to an electrode surface. Various organic ligand/transition metal complexes have been found to be useful in the role of the redox mediator. Also provided are systems and methods of making the sensors and using the electrochemical analyte sensors in analyte monitoring.

L'invention porte, selon des modes de réalisation, sur des compositions sensibles à un analyte et sur des capteurs électrochimiques d'analytes ayant une couche sensible qui comprend une enzyme sensible à un analyte et un polymère cationique. La couche sensible peut en outre avantageusement comprendre une matière de médiateur redox qui facilite le transfert d'électrons entre l'enzyme et une électrode. Le médiateur peut être associé soit de façon covalente soit de façon non covalente au polymère cationique, lequel, à son tour, est disposé au voisinage proche d'une surface d'électrode. Il a été découvert que divers complexes ligand organique/métal de transition étaient utiles dans le rôle du médiateur redox. L'invention porte également sur des systèmes et des procédés de fabrication des capteurs et sur l'utilisation des capteurs électrochimiques d'analytes dans la surveillance d'analytes.

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