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Effects of glucagon-like peptide-1 on endothelial function in type 2 diabetes patients with stable coronary artery disease
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- Nystrom, T (author)
- Karolinska Institutet
- Gutniak, MK (author)
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- Zhang, QM (author)
- Karolinska Institutet
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- Holst, JJ (author)
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- (creator_code:org_t)
- American Physiological Society, 2004
- 2004
- English.
- In: American Journal of Physiology: Endocrinology and Metabolism. - : American Physiological Society. - 1522-1555 .- 0193-1849. ; 287:6, s. 1209-1215
- Journal article (peer-reviewed)
Abstract
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- GLP-1 stimulates insulin secretion, suppresses glucagon secretion, delays gastric emptying, and inhibits small bowel motility, all actions contributing to the anti-diabetogenic peptide effect. Endothelial dysfunction is strongly associated with insulin resistance and type 2 diabetes mellitus and may cause the angiopathy typifying this debilitating disease. Therefore, interventions affecting both endothelial dysfunction and insulin resistance may prove useful in improving survival in type 2 diabetes patients. We investigated GLP-1's effect on endothelial function and insulin sensitivity (S-I) in two groups: 1) 12 type 2 diabetes patients with stable coronary artery disease and 2) 10 healthy subjects with normal endothelial function and S-I. Subjects underwent infusion of recombinant GLP-1 or saline in a random crossover study. Endothelial function was measured by postischemic FMD of brachial artery, using ultrasonography. S-I [in (10(-4) dl.kg(-1).min(-1))/(muU/ml)] was measured by hyperinsulinemic isoglycemic clamp technique. In type 2 diabetic subjects, GLP-1 infusion significantly increased relative changes in brachial artery diameter from baseline FMD(%) (3.1 +/- 0.6 vs. 6.6 +/- 1.0%, P < 0.05), with no significant effects on S-I (4.5 &PLUSMN; 0.8 vs. 5.2 &PLUSMN; 0.9, P = NS). In healthy subjects, GLP-1 infusion affected neither FMD(%) (11.9 &PLUSMN; 0.9 vs. 10.3 &PLUSMN; 1.0%, P = NS) nor S-I (14.8 &PLUSMN; 1.8 vs. 11.6 &PLUSMN; 2.0, P = NS). We conclude that GLP-1 improves endothelial dysfunction but not insulin resistance in type 2 diabetic patients with coronary heart disease. This beneficial vascular effect of GLP-1 adds yet another salutary property of the peptide useful in diabetes treatment.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Fysiologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Physiology (hsv//eng)
Keyword
- nitric oxide
- insulin resistance
Publication and Content Type
- art (subject category)
- ref (subject category)
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- Nystrom, T
- Gutniak, MK
- Zhang, QM
- Zhang, F
- Holst, JJ
- Ahrén, Bo
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- MEDICAL AND HEALTH SCIENCES
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- Lund University
- Karolinska Institutet
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