Monitoring metabolic control in diabetic patients by measuring glycosylated amino acids and peptides in urine
First Claim
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1. A method of monitoring blood glucose integrated over a period of time from about one week to about one month, separating and quantitating non-enzymatic glycosylated amino acids, peptides or mixtures thereof present in the patient'"'"'s urine, comprising:
- (a) treating a urine sample containing said non-enzymatic glycosylated amino acids, peptides or mixtures thereof with a suitable boronic acid to form a complex of said non-enzymatic glycosylated amino acids, peptides or mixtures thereof with said boronic acid;
(b) separating the so-formed complex from said urine; and
(c) analyzing the separated complexed material to establish the presence and amount of amino acids, peptides or mixtures thereof to obtain the complexed non-enzymatically glycosylated amino acid content of the urine, which content provides an indicia of blood glucose integrated over a period of time from about one week to about one month.
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Abstract
A method of monitoring metabolic control in a diabetes patient comprising measuring the amount of non-enzymatic glycosylated amino acids and peptides in urine of the patient; a method of measurement and a test kit for the measurement are disclosed.
86 Citations
26 Claims
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1. A method of monitoring blood glucose integrated over a period of time from about one week to about one month, separating and quantitating non-enzymatic glycosylated amino acids, peptides or mixtures thereof present in the patient'"'"'s urine, comprising:
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(a) treating a urine sample containing said non-enzymatic glycosylated amino acids, peptides or mixtures thereof with a suitable boronic acid to form a complex of said non-enzymatic glycosylated amino acids, peptides or mixtures thereof with said boronic acid; (b) separating the so-formed complex from said urine; and (c) analyzing the separated complexed material to establish the presence and amount of amino acids, peptides or mixtures thereof to obtain the complexed non-enzymatically glycosylated amino acid content of the urine, which content provides an indicia of blood glucose integrated over a period of time from about one week to about one month. - View Dependent Claims (3, 4, 5, 6, 7, 8)
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2. A method of monitoring blood glucose integrated over a period of time from about one week to about one month, by separating and quantitating non-enzymatic glycosylated amino acids, peptides or mixtures thereof present in the patient'"'"'s urine, comprising:
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(a) contacting a urine sample containing said non-enzymatic glycosylated amino acids, peptides or mixtures thereof with a color dye reactive with amino acids so as to attach the dye to said non-enzymatic glycosulated amino acids, peptides or mixtures thereof; (b) treating the dye containing solution so produced with a suitable boronic acid to form a complex of said non-enzymatic glycosylated amino acids, peptides or mixtures thereof with such boronic acid; (c) separating the so-formed complex from said fluid; and (d) colorimetrically analyzing the separated, dyed, complexed material to establish the presence and amount of of amino acids, peptides or mixtures thereof to obtain the amino acid content of the urine, which content provides an indicia of blood glucose integrated over a period of from about one week to about one month.
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- 9. A method for monitoring metabolic control in a diabetes patient comprising measuring the amount of non-enzymatic glycosylated amino acids and peptides in the urine of the patient and comparing the measurement with a previously prepared standard showing non-enzymatic glycosylated amino acid and peptide content as a function of integrated blood glucose concentration.
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13. A test kit for the colorimetric determination of non-enzymatically glycosylated amino acids and/or peptides in a urine sample, comprising:
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(a) a predetermined amount of an insolubilized suitable boronic acid; (b) a predetermined amount of a color dye reactive with amino acids by attachment of the dye to said non-enzymatic glycosylated amino acids and/or peptides, whereby (a) and (b) are separated from one another by being placed in separate containers; and (c) previously prepared standards for colorimetric comparison. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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- 23. A test strip for the colorimetric detection of non-enzymatically glycosylated amino acids and/or peptides in a urine sample comprising a strip of porous material which has been at least partially coated with an insolubilized boronic acid and impregnated with a color dye reactive with amino acids by attachment of the dye to said nonenzymatic glycosylated amino acids and/or peptides.
Specification