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
DeSouza CA
中科院分区:
医学2区
文献类型:
--
作者:
Diehl KJ;Templeton DL;Ma J;Weil BR;Greiner JJ;Stauffer BL;DeSouza CA

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本研究的实验目的是确定ET-1介导的血管收缩张力是否在空腹血糖浓度受损的成年人中升高,独立于其他心血管危险因素。前臂血流量(FBF:选择性ETA受体阻断剂(BQ-123:100 nmol/min,60 min)和非选择性ETA/B受体阻断剂(BQ-123 + BQ-788:50 nmol/min,60 min)动脉内输注后,测定了28名中年、久坐成人(17名男性/11名女性)的体积描记法(体积描记法)反应:14名空腹血糖正常的成年人(年龄:57±2岁; 6名女性/8名男性; BMI:29.2±0.9 kg/m2;血糖:4.9±0.1 mmol/L)和14例空腹血糖受损(58±1岁; 5 F/9 M; 29.6±1.1 kg/m2; 5.8±0.1 mmol/L)浓度。选择性ETA受体阻断剂引起空腹血糖受损成人FBF显著增加(~20%),与血糖正常对照组相比。阻断ETA/B受体可使空腹血糖正常成人的FBF增加2倍(P<0.05),而阻断ETA受体可使空腹血糖受损成人的FBF增加2倍(P<0.05)。空腹血糖水平与ETA(r=0.44; P<0.05)和ETA/B(r=0.62; P<0.05)阻断的血管反应峰值呈正相关。没有其他人体测量,血流动力学或代谢变量与血流反应ET-1受体阻滞剂。ET-1介导的血管收缩张力在空腹血糖浓度受损的成人中升高,与其他心脏代谢危险因素无关。增强的ET-1系统活性可能是空腹血糖浓度受损的成年人内皮血管功能障碍和心血管风险增加的基础。
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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