Impaired fasting blood glucose is associated with increased endothelin-1 vasoconstrictor tone.
Impaired fasting blood glucose is associated with increased endothelin-1 vasoconstrictor tone.
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DOI:
10.1016/j.atherosclerosis.2013.04.006
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发表时间:
2013-07
期刊:
影响因子:
5.3
通讯作者:
DeSouza CA
中科院分区:
文献类型:
--
作者:
Diehl KJ;Templeton DL;Ma J;Weil BR;Greiner JJ;Stauffer BL;DeSouza CA
The experimental aim of this study was to determine whether ET-1-mediated vasoconstrictor tone is elevated in adult humans with impaired fasting blood glucose concentrations, independent of other cardiovascular risk factors. Forearm blood flow (FBF: plethysmography) responses to intra-arterial infusion of selective ETA receptor blockade (BQ-123: 100 nmol/min for 60 min) and non-selective ETA/B blockade (BQ-123 + BQ-788: 50 nmol/min for 60 min) were determined in 28 middle-aged, sedentary adults (17 M/11 F): 14 with normal fasting blood glucose (age: 57±2 yr; 6F/8M; BMI: 29.2±0.9 kg/m2; glucose: 4.9±0.1 mmol/L) and 14 impaired fasting blood glucose (58±1 yr; 5F/9M; 29.6±1.1 kg/m2; 5.8±0.1 mmol/L) concentrations. Selective ETA receptor blockade elicited a significantly greater (~20%) increase in FBF in the impaired fasting glucose adults compared with the normoglycemia controls. ETA/B blockade resulted in a further 2-fold increase (P<0.05) in FBF above that elicited by ETA receptor antagonism in the impaired fasting glucose but not normal fasting glucose adults. There was a positive correlation between fasting blood glucose levels and the peak vascular responses to ETA (r=0.44; P<0.05) and ETA/B (r=0.62; P<0.05) blockade. No other anthropometric, hemodynamic or metabolic variable was correlated with the blood flow responses to ET-1 receptor blockade. ET-1-mediated vasoconstrictor tone is elevated in adults with impaired fasting blood glucose concentrations, independent of other cardiometabolic risk factors. Enhanced ET-1 system activity may underlie endothelial vasomotor dysfunction and increased cardiovascular risk in adults with impaired fasting blood glucose concentrations.
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