BIOSENSOR FOR HEALTH MONITORING AND USES THEREOF

• US 20120016217A1
• Filed: 07/15/2010
• Published: 01/19/2012
• Est. Priority Date: 07/15/2010
• Status: Abandoned Application

• Current Assignee: Indian Institute of Technology Bombay
• Original Assignee: Indian Institute of Technology Bombay
• Inventors: SRIVASTAVA, Rohit, Joshi, Abhijeet Balwantrao
• Application Number:
  US12/837,218
• Publication Number:
  US 20120016217A1
• Time in Patent Office: Days
• US Class Current: 600/317
• CPC Class Codes: A61B 2562/028 Microscale sensors, e.g. electromechanical sensors [MEMS]
• CPC Class Codes: A61B 2562/0285 Nanoscale sensors
• CPC Class Codes: A61B 2562/12 Manufacturing methods specially adapted for producing sensors for in-vivo measurements
• CPC Class Codes: A61B 5/0068 Confocal scanning
• CPC Class Codes: A61B 5/0071 by measuring fluorescence emission
• CPC Class Codes: A61B 5/1455 using optical sensors, e.g. spectral photometrical oximeters
• CPC Class Codes: A61B 5/14556 by fluorescence A61B5/14555 takes precedence

Abstract

Disclosed are methods, compositions and kits pertaining to detecting and/or measuring biological analytes. In certain embodiments the disclosure relates to detection and measurement of lactate, pyruvate, oxygen and/or hydrogen peroxide. In some aspects and embodiments provided are biosensors that may be or include nanoparticles, microparticles and/or nano-in-micro matrices. The methods and compositions disclosed may have uses in purpose of diagnosis and treatment of diseases, fitness and health monitoring in sports, in space medicine, in food applications and the food industry, in pharmaceutical applications and the pharmaceutical industry, for fermentation monitoring, and in polymer manufacturing applications. In some embodiments and aspects, the disclosure relates to minimally invasive biosensors and/or biosensors that may be used for continuous monitoring.

Claims

1. A method of measuring lactate, pyruvate, oxygen or hydrogen peroxide levels in a subject;

comprising;

implanting in the subject a biosensor comprising a nano-in-micro matrix, wherein the nano-in-micro matrix is used to measure the lactate, pyruvate, oxygen or hydrogen peroxide levels.

2. The method of claim 1, wherein the size of the nanoparticles of the nano-in-micro matrix are between 1 and 2000 nm and wherein the microparticles are between 650 nm and 100 μ

m.

3. The method of claim 1, wherein the nanoparticles of the nano-in-micro matrix comprise a copolymer synthesized from one or more of:

4-hydroxyl benzyl alcohol, 1,8-octane diol, polyethylene imine, or oxalyl chloride.

4. The method of claim 1, wherein the implanting comprises injecting the biosensor intramuscularly, intravenously, subcutaneously, intradermally or intraperitoneally in the subject.

5. The method of claim 1, wherein the biosensor comprises lactate oxidase (Lox), lactate dehydrogenase, and/or lactate monooxygenase.

6. The method of claim 1, wherein the nano-in-micro matrix comprises a peroxalate polymer that emits light in the near infra red range (600 nm to 1100 nm) in the presence of hydrogen peroxide.

7. The method of claim 6, wherein the method further comprises detecting light at 630 nm emitted from a fluorophore in the nano-in-micro matrix, and correlating the light to the presence and/or amount of hydrogen peroxide in the subject.

8. The method of claim 1, wherein the nano-in-micro matrix comprises at least one fluorescence based oxygen sensitive dye selected from:

ruthenium based dyes or porphyrins.

9. The method of claim 1, wherein the method comprises measuring and/or detection of fluorescence and/or light emitted from the nano-in-micro matrix, and correlating the fluorescence and/or light to the presence and/or amount of hydrogen peroxide or oxygen in the subject.

10. The method of claim 9, wherein the amount of hydrogen peroxide or oxygen is used to calculate the amount of lactate in the subject.

11. The method of claim 1, wherein the nano-in-micro matrix is implanted intramuscularly into a subject at a depth of about 3 mm.

19. The composition of claim 1, wherein the nanoparticles and/or microparticles of the nano-in-micro matrix are coated using layer-by-layer self assembly with at least one polyelectrolyte.

12. A composition comprising:

a nano-in-micro matrix, wherein the nano-in-micro matrix comprises a copolymer synthesized from one or more of;

4-hydroxyl benzyl alcohol, 1,8-octane diol, polyethylene imine, or oxalyl chloride.

13. The composition of claim 12, wherein the nano-in-micro matrix comprises at least one fluorescence based oxygen sensitive dye selected from ruthenium based dyes or porphyrins.

14. The composition of claim 12, wherein the nano-in-micro matrix comprises lactate oxidase (Lox), lactate dehydrogenase, and/or lactate monooxygenase.

15. The composition of claim 12, wherein the size of the nanoparticles of the nano-in-micro matrix are between 1 and 2000 nm and wherein the microparticles are between 650 nm and 100 μ

m.

16. The composition of claim 12, wherein the nano-in-micro matrix emits light in the near infra red range (600 nm to 1100 nm) in the presence of hydrogen peroxide.

17. The composition of claim 12, wherein the nano-in-micro matrix emits light in the near infra red range (600 nm to 1100 nm) in the presence of oxygen.

18. The composition of claim 12, wherein the nanoparticles and/or microparticles of the nano-in-micro matrix comprise one or more of PSS, PAH, PAA, chondroitin sulphate, collagen, dextran sulphate, PEI, chitosan, or alginate.

20. A method of monitoring the metabolic status of a subject, comprising:

implanting in the subject a composition of claim 12;

wherein the composition is used to measure the lactate, pyruvate, oxygen or hydrogen peroxide levels; and

wherein the levels of lactate, pyruvate, oxygen or hydrogen peroxide levels are indicative of the metabolic status of the subject.