Exenatide Alters Myocardial Glucose Transport and Uptake Depending on Insulin Resistance and Increases Myocardial Blood Flow in Patients with Type 2 Diabetes
| Autor: | Niels Møller, Michael Gejl, Jørgen Rungby, Bo Martin Bibby, Hanne Maare Søndergaard, Birgitte Brock, Hans Erik Bøtker, Albert Gjedde, Chalotte Willemann Stecher, Søren B. Hansen |
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| Rok vydání: | 2012 |
| Předmět: |
Male
medicine.medical_specialty Endocrinology Diabetes and Metabolism Glucose uptake medicine.medical_treatment Clinical Biochemistry Type 2 diabetes Biochemistry Placebos Endocrinology Insulin resistance Double-Blind Method Coronary Circulation Diabetes mellitus Internal medicine medicine Humans Hypoglycemic Agents Cross-Over Studies Venoms business.industry Myocardium Insulin Biochemistry (medical) Type 2 Diabetes Mellitus Biological Transport Heart Middle Aged medicine.disease Up-Regulation Glucose Diabetes Mellitus Type 2 Regional Blood Flow Positron-Emission Tomography Exenatide Insulin Resistance Peptides business Hyperglycemic agent medicine.drug |
| Zdroj: | Jensen, M G, Søndergaard, H S, Stecher, C, Bibby, B M, Møller, N, Bøtker, H E, Hansen, S B, Gjedde, A, Rungby, J & Brock, B 2012, ' Exenatide alters myocardial glucose transport and uptake depending on insulin resistance and increases myocardial blood flow in patients with type 2 diabetes ', Journal of Clinical Endocrinology and Metabolism, vol. 97, no. 7, pp. E1165-9 . https://doi.org/10.1210/jc.2011-3456 |
| ISSN: | 1945-7197 0021-972X |
| Popis: | Context: Glucagon-like peptide-1 (GLP-1) and GLP-1 receptor agonists provide beneficial cardiovascular effects by protecting against ischemia and reperfusion injury. Type 2 diabetes mellitus patients have reduced glycolysis in the heart. Objective: We hypothesized that cardioprotection by GLP-1 is achieved through increased glucose availability and utilization and aimed to assess the effect of exenatide, a synthetic GLP-1 receptor agonist, on myocardial glucose uptake (MGU), myocardial glucose transport, and myocardial blood flow (MBF). Design and Methods: We conducted a randomized, double-blinded, placebo-controlled crossover study in eight male, insulin-naive, type 2 diabetes mellitus patients without coronary artery disease. Positron emission tomography was used to determine the effect of exenatide on MGU and MBF during a pituitary-pancreatic hyperglycemic clamp with (18)F-fluorodeoxyglucose and (13)N-ammonia as tracers. Results: Overall, exenatide did not alter MGU. However, regression analysis revealed that exenatide altered initial clearance of glucose over the membrane of cardiomyocytes and MGU, depending on the level of insulin resistance (P = 0.017 and 0.010, respectively). Exenatide increased MBF from 0.73 ± 0.094 to 0.85 ± 0.091 ml/g · min (P = 0.0056). Except for an increase in C-peptide levels, no differences in circulating hormones or metabolites were found. Conclusions: The action of exenatide as an activator or inhibitor of the glucose transport and glucose uptake in cardiomyocytes is dependent on baseline activity of glucose transport and insulin resistance. Exenatide increases MBF without changing MGU. |
| Databáze: | OpenAIRE |
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