Device for the determination of glycated hemoglobin
An electrochemical device for determining the percentage of glycated hemoglobin in a blood sample is provided. The device includes a cathode and anode and one or more cells. The device may include an enzyme capable of reducing oxygen to water for determining the total amount of hemoglobin in a sample by electrochemically measuring, in an oxygen electroreduction reaction at a cathode, the amount of oxygen in the sample. The device may also be used to determine the amount of glycated hemoglobin in the sample (e.g., spectrometrically or electrochemically). Also provided are devices that include glycated hemoglobin hydrolysis agents or glycated hemoglobin separating agents.
1. A device for use in assaying glycated hemoglobin in a blood, blood-containing, or blood-derived sample, comprising:
an electrochemical cell comprising:
a cathode comprising an enzyme capable of reducing oxygen to water; an anode; and
a glycated hemoglobin hydrolysis agent or a glycated hemoglobin separating agent.
2. The device of claim 1 , further comprising a spectrophotometer for determining an amount of glycated hemoglobin in the sample, a glycated hemoglobin hydrolysis agent, or a glycated hemoglobin separating agent.
3. The device of claim 1 , further comprising an enzyme that oxidizes fructosyl amines or a cross-linked poly N-vinyl imidazole based redox polymer film.
4. The device of claim 1 , wherein the electrochemical cell comprises a single chamber.
5. The device of claim 1 , wherein the cathode further comprises a redox mediator.
6. The device of claim 5 , wherein the cathode enzyme is a four copper-ion containing copper enzyme.
7. The device of claim 6 , wherein the four copper-ion containing copper enzyme is selected from a laccase, a bilirubin oxidase, ceruloplasmin and ascorbate oxidase.
8. The device of claim 7 , wherein the enzyme is a bilirubin oxidase.
9. The device of claim 8 wherein the redox mediator is polyacrylamide-poly(n-vinylimidazone)-[Os(4,4′-dichloro-2,2′-bipyridine) 2 Cl] +/2 (PAA-PVI-[Os(4,4′-dichloro-2,2′-bipyridine) 2 Cl] +/2+ ).
10. The device of claim 1 , wherein the glycated hemoglobin hydrolysis agent is a proteolytic enzyme.
11. The device of claim 10 , comprising an enzyme that oxidizes ketoamines.
12. The device of claim 11 , wherein the enzyme that oxidizes ketoamines is selected from a fructosamine oxidase and a four copper-ion containing copper enzyme.
13. The device of claim 12 , further comprising a redox mediator.
14. The device of claim 13 , wherein the redox mediator is an Os 2+/3+ or Ru 2+3+ complex.
15. The device of claim 1 , wherein the separating agent is selected from an anti-glycated hemoglobin antibody and a boronic acid-modified surface.
16. The device of claim 15 , wherein the separating agent is an immobilized anti-glycated hemoglobin antibody.
17. The device of claim 16 , wherein the boronic acid modified surface is selected from magnetic, polymer or glass beads.
18. The device of claim 1 , further comprising an enzyme that oxidizes fructosyl amines.
19. The device of claim 18 , wherein the enzyme is selected from a fructosyl amine oxidase or a four copper-ion containing copper enzyme.
20. The device of claim 1 , further comprising a cross-linked poly N-vinyl imidazole based redox polymer film.
21. The device of claim 1 , wherein the cell comprises both a glycated hemoglobin hydrolysis agent and a glycated hemoglobin separating agent.
22. The device of claim 21 , wherein the glycated hemoglobin hydrolysis agent is a proteolytic enzyme.
23. The device of claim 22 , further comprising an enzyme that oxidizes ketoamines.
24. The device of claim 23 , wherein the enzyme that oxidizes ketoamines is selected from a fructosamine oxidase and a four copper ion containing copper enzyme.