Salivary protein glycosylation test for diagnosis and monitoring of diabetes
First Claim
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1. A method of determining a glycemic state in a subject, the method comprising:
- chemically oxidizing a saliva sample from the subject, thereby oxidizing one or more glycoproteins in the saliva sample to generate one or more oxidation products, wherein the one or more oxidation products comprise one or more aldehydes;
quantifying the one or more aldehydes in the oxidized saliva sample; and
comparing a level of the one or more aldehydes to a normal control value, wherein an increase in the level of the one or more aldehydes indicates that the subject has an elevated glycemic state.
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Abstract
Disclosed herein are methods and tests for diagnosing and/or monitoring a metabolic condition such as diabetes in a subject, wherein the methods and tests measure salivary glycoproteins. Some of the methods are based on the oxidation of glycoproteins in a sample from the subject, such as saliva or urine, for example using sodium metaperiodate, and then detecting the aldehydes generated during oxidation using a chemical detection method. Also disclosed are kits and lateral flow devices for detecting glycoproteins in a saliva sample.
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Citations
19 Claims
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1. A method of determining a glycemic state in a subject, the method comprising:
- chemically oxidizing a saliva sample from the subject, thereby oxidizing one or more glycoproteins in the saliva sample to generate one or more oxidation products, wherein the one or more oxidation products comprise one or more aldehydes;
quantifying the one or more aldehydes in the oxidized saliva sample; and comparing a level of the one or more aldehydes to a normal control value, wherein an increase in the level of the one or more aldehydes indicates that the subject has an elevated glycemic state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- chemically oxidizing a saliva sample from the subject, thereby oxidizing one or more glycoproteins in the saliva sample to generate one or more oxidation products, wherein the one or more oxidation products comprise one or more aldehydes;
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10. A lateral flow device for detecting glycoproteins in a saliva sample, the lateral flow device comprising:
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a first membrane comprising sodium metaperiodate; a second membrane in operable contact with the first membrane, the second membrane comprising NaOH; a third membrane in operable contact with the second membrane, the third membrane comprising immobilized 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole (AHMT); and a mesh layer disposed between the second membrane and the third membrane. - View Dependent Claims (11, 12, 13)
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14. A kit for detecting glycoproteins in a saliva sample, the kit comprising:
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a reagent for oxidizing glycoproteins in a saliva sample; a test strip for detecting aldehydes in an oxidized saliva sample, the test strip comprising; a first membrane comprising NaOH; a second membrane in operable contact with the first membrane, the second membrane comprising immobilized 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole (AHMT); a mesh layer disposed between the first membrane and the second membrane, and instructions for using the kit. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification