Granted Patent
B2
US 12,577,604 · App. 18/597,704 · Granted Mar 17, 2026
NAD(P)-dependent responsive enzymes, electrodes and sensors, and methods for making and using the same
Assignee:
Abbott Diabetes Care Inc.
C12Q1/001A61B5/14865C12N11/082C12Q1/004C12Q1/005C12Q1/006C12Q1/26G01N27/3275G01N33/5735G01N33/66C12Y106/05002G01N27/27
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Abstract
NADP-dependent oxidoreductase compositions, and electrodes, sensors and systems that include the same. Analyte sensors include an electrode having a sensing layer disposed thereon, the sensing layer comprising a polymer and an enzyme composition distributed therein. The enzyme composition includes nicotinamide adenine dinucleotide phosphate (NAD(P) + ) or derivative thereof; an NAD(P) + -dependent dehydrogenase; an NAD(P)H oxidoreductase; and an electron transfer agent comprising a transition metal complex.
Claims (26)
1 . An electrochemical analyte sensor for monitoring lactate concentration, comprising:
a first portion configured to be positioned above a user's skin; and
a second portion configured to be transcutaneously positioned in the user's skin and in contact with the user's biological fluid to monitor the level of lactate in vivo, the second portion comprising:
(i) a working electrode comprising an enzyme composition disposed on the working electrode, the enzyme composition comprising:
a) nicotinamide adenine dinucleotide (phosphate) (NAD(P)+) or a derivative thereof;
b) an NAD(P)+-dependent dehydrogenase suitable for monitoring the concentration of lactate;
c) an NAD(P)H oxidoreductase; and
d) a polymeric redox mediator; and
(ii) a membrane disposed on the enzyme composition,
wherein the NAD(P)+ or derivative thereof is not covalently bonded to the polymeric redox mediator.
2 . The analyte sensor of claim 1 , wherein the NAD(P)H oxidoreductase is covalently bonded to the polymeric redox mediator.
3 . The analyte sensor of claim 1 , wherein the NAD(P)+-dependent dehydrogenase suitable for monitoring the concentration of lactate is covalently bonded to the polymeric redox mediator.
4 . The analyte sensor of claim 1 , wherein the enzyme composition comprises NAD(P)+.
5 . The analyte sensor of claim 1 , wherein the enzyme composition comprises the derivative of NAD(P)+.
6 . The analyte sensor of claim 5 , wherein the derivative of NAD(P)+ is a compound of Formula I:
wherein X is alkyl, substituted alkyl, aryl, substituted aryl, acyl, and aminoacyl.
7 . The analyte sensor of claim 6 , wherein the derivative of NAD(P)+ is:
8 . The analyte sensor of claim 1 , wherein the NAD(P)H oxidoreductase is diaphorase.
9 . The analyte sensor of claim 1 , wherein the polymeric redox mediator comprises an osmium-containing complex.
10 . The analyte sensor of claim 1 , wherein the enzyme composition further comprises a crosslinker.
11 . The analyte sensor of claim 1 , wherein the membrane comprises polyvinylpyridine.
12 . The analyte sensor of claim 1 , wherein the NAD(P)+-dependent dehydrogenase and the NAD(P)H oxidoreductase are covalently bonded to the polymeric redox mediator.
13 . The analyte sensor of claim 9 , wherein the osmium-containing complex comprises three heterocyclic nitrogen-containing bidentate ligands.
14 . The analyte sensor of claim 9 , wherein the osmium-containing complex comprises two biimidazole and one imidazole-pyridine bidentate ligands.
15 . The analyte sensor of claim 9 , wherein the polymeric redox mediator comprises a heterocycle-containing polymer.
16 . The analyte sensor of claim 15 , wherein the heterocycle-containing polymer comprises polyvinyl pyridine.
Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Jun 27, 2024
From: OUYANG, TIANMEI; FELDMAN, BENJAMIN J.
To: ABBOTT DIABETES CARE INC.
Reel/Frame 067864/0012 →
Continuity (4)
Continuation
16081162
Provisional Application
62303626
· Mar 4, 2016
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