Insulin-induced vasoconstriction is prevalent in muscle microvasculature of otherwise healthy persons with type 1 diabetes.

Insulin-induced vasoconstriction is prevalent in muscle microvasculature of otherwise healthy persons with type 1 diabetes.
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胰岛素诱导的血管收缩在其他健康的 1 型糖尿病患者的肌肉微血管系统中普遍存在。

DOI:
10.1152/ajpendo.00242.2022
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发表时间:
2023
期刊:
American journal of physiology. Endocrinology and metabolism
影响因子:
--
通讯作者:
Barrett,EugeneJ
Barrett,EugeneJ
中科院分区:
--
文献类型:
--
作者:
Jahn,LindaA;Hartline,LeeM;Kleiner,AmandaJ;Horton,WilliamB;Hasan,Farhad;WaiKitTan,Alvin;Liu,Zhenqi;Barrett,EugeneJ

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胰岛素的微血管作用及其与胰岛素代谢作用的关系在成人1型糖尿病(T1 DM)中还没有得到很好的研究。我们比较了健康成人对照组(n=16)和无临床微血管疾病的T1 DM患者(n=15)对胰岛素的代谢和选择的微血管和大血管反应。我们用超声造影(CEU)测量了胰岛素对骨骼肌微血管灌注的影响,用颈动脉-股动脉脉搏波速度(CfPWV)和桡动脉脉搏波分析(PWA)测量了动脉硬度,用葡萄糖输注率(GIR)测量了胰岛素对正常血糖-胰岛素钳夹2小时、1mU/min/kg代谢胰岛素敏感性的影响。T1 DM患者存在代谢胰岛素抵抗(GIR=5.2±0.7vs.6.6±0.6 mg/min/kg,P<0.001.0 5)。胰岛素增加了对照组的肌肉微血管血容量和血流量(P&lt;各0.001),但在T1 DM患者中不增加。代谢胰岛素敏感性与肌肉微血管灌注量的增加相关(P&lt;0.05)。血管硬度的基线测量在不同组之间没有差异。然而,在高胰岛素血症期间,T1 DM组的cfPWV更大(P&lt;0.02),而对照组的反向脉压仅在胰岛素作用下下降(P&lt;0.03),这两个指标都表明只有对照组的胰岛素诱导血管松弛。T1糖尿病患者存在肌肉微血管胰岛素抵抗,这可能是临床微血管疾病的先兆。NEW&NOTEWORTHY使用声学造影和血管硬度测量,我们比较了1型糖尿病患者和年龄匹配的对照组的血管和代谢对胰岛素的反应。1型糖尿病患者表现出血管和代谢胰岛素抵抗,超过一半的糖尿病患者对胰岛素有反常的血管收缩反应。
Insulin’s microvascular actions and their relationship to insulin’s metabolic actions have not been well studied in adults with type 1 diabetes mellitus (T1DM). We compared the metabolic and selected micro- and macrovascular responses to insulin by healthy adult control (n= 16) and subjects with T1DM (n= 15) without clinical microvascular disease. We measured insulin’s effect on1) skeletal muscle microvascular perfusion using contrast-enhanced ultrasound (CEU),2) arterial stiffness using carotid-femoral pulse-wave velocity (cfPWV) and radial artery pulse wave analysis (PWA), and3) metabolic insulin sensitivity by the glucose infusion rate (GIR) during a 2-h, 1 mU/min/kg euglycemic-insulin clamp. Subjects with T1DM were metabolically insulin resistant (GIR = 5.2 ± 0.7 vs. 6.6 ± 0.6 mg/min/kg,P< 0.001). Insulin increased muscle microvascular blood volume and flow in control (P< 0.001, for each) but not in subjects with T1DM. Metabolic insulin sensitivity correlated with increases of muscle microvascular perfused volume (P< 0.05). Baseline measures of vascular stiffness did not differ between groups. However, during hyperinsulinemia, cfPWV was greater (P< 0.02) in the T1DM group and the backward pulse wave pressure declined with insulin only in controls (P< 0.03), both indices indicating that insulin-induced vascular relaxation in controls only. Subjects with T1DM have muscle microvascular insulin resistance that may precede clinical microvascular disease.NEW & NOTEWORTHYUsing contrast ultrasound and measures of vascular stiffness, we compared vascular and metabolic responses to insulin in patients with type 1 diabetes with age-matched controls. The patients with type 1 diabetes demonstrated both vascular and metabolic insulin resistance with more than half of the patients with diabetes having a paradoxical vasoconstrictive vascular response to insulin.
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