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Effects of angiotensin II AT1 receptor inhibition and exercise training on insulin action in rats on high-fat diet

机译:高脂饮食对大鼠血管紧张素ⅡAT1受体的抑制和运动训练对胰岛素作用的影响

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Aim: This study was to determine whether combination of the angiotensin II AT1 receptor blocker (ARB), candesartan cilexetil, and exercise training can prevent the development of high-fat diet-induced insulin resistance. Main methods: F344/NSlc rats were fed normal chow diet or high-fat (HF) diet for 7 weeks. The HF-fed rats were either administered candesartan cilexetil (5 mg?kg - 1?day - 1), exercise-trained, or received a combination of these 2 treatments. Key findings: Oral glucose tolerance tests (OGTT) showed that combined treatment with candesartan cilexetil and exercise increased glucose tolerance as compared with each treatment alone in HF-fed rats. Moreover, euglycemic-hyperinsulinemic clamp analysis showed improvement in glucose infusion rate with exercise training or candesartan cilexetil treatment alone, and further improvement was observed with the combination treatment. Systolic blood pressure improved with candesartan cilexetil but not with exercise alone. Finally, Glut-4 protein expression in soleus muscle was decreased with HF diet, and the expression was increased by exercise and not candesartan cilexetil treatment. Significance: These results suggest that the combination of candesartan cilexetil and exercise training improves insulin resistance as compared with each treatment alone.
机译:目的:本研究旨在确定血管紧张素II AT1受体阻滞剂(ARB),坎地沙坦cilexetil和运动训练的组合是否可以预防高脂饮食诱导的胰岛素抵抗。主要方法:F344 / NSlc大鼠接受普通食物或高脂饮食7周。 HF喂养的大鼠要么接受坎地沙坦酯(5 mg?kg-1?day-1),运动训练,要么接受这两种治疗的组合。关键发现:口服葡萄糖耐量试验(OGTT)显示,与单独使用HF喂养的大鼠的每种疗法相比,坎地沙坦酯联合运动疗法和运动疗法的葡萄糖耐量增加。此外,正常血糖-高胰岛素钳夹分析显示,仅通过运动训练或坎地沙坦西艾克司地尔治疗可改善葡萄糖输注速率,并观察到联合治疗可进一步改善。坎地沙坦酯可改善收缩压,但不能单独运动。最后,HF饮食降低了比目鱼肌中Glut-4蛋白的表达,而运动而不是坎地沙坦cilexetil治疗后其表达增加。意义:这些结果表明,坎地沙坦酯与运动训练的组合与单独使用每种疗法相比,可改善胰岛素抵抗。

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