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糖尿病大鼠心肌能量底物利用的改变对高能磷酸化合物的影响 被引量:1

Change in energy substrate utilization in the heart of diabetic rats and its effect on high energy phosphate compound
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摘要 2型糖尿病大鼠成模后2周进行离体心脏灌注,显示心肌葡萄糖摄取能力降低,葡萄糖氧化减少、脂肪酸氧化增加,高能磷酸盐合成减少,这可能是糖尿病易发生心肌病和在缺血条件下心肌损伤更趋严重的代谢基础。 Isolated hearts of type 2 diabetic rats were perfused with K-H buffer containing glucose and ^3H-labeled palmitate by a Langendorff perfusion apparatus. The results revealed that glucose uptake by hearts of diabetic rats was significantly depressed, glucose oxidation was decreased and palmitate oxidation was increased. The myocardial ATP content declined gradiently. Change in energy substrate utilization seems to be a significant factor contributing to cardiomyopathy and rendered diabetes more vulnerable to ischemic injury.
出处 《中华内分泌代谢杂志》 CAS CSCD 北大核心 2005年第6期567-568,共2页 Chinese Journal of Endocrinology and Metabolism
关键词 糖尿病 2型 离体心脏灌注 葡萄糖氧化 脂肪酸氧化 高能磷酸盐 大鼠 SpragueDawley Diabetes mellitus, type 2 Perfusion of isolated heart Glucose oxidation Fatty acid oxidation High energy phosphate Rat, Sprague-Dawley
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  • 1Stanley WC, Lopaschuk GD, McCormack JG. Regulation of energy substrate metabolism in the diabetic heart. Cardiovasc Res, 1997,34 :25-33.
  • 2Reed M J, Meszaros K, Entes LJ, et al. A new rat model of type 2 diabetes : the fat-fed, streptozotocin-treated rat. Metabolism, 2000,49 :1390-1394.
  • 3Lopaschuk GD, Barr RL. Measurements of fatty acid and carbohydrate metabolism in the isolated working rat heart. Mol Cell Biochem, 1997,172 : 137-147.
  • 4Korvald C, Elvenes OP, Myrmel T. Myocardial substrate metabolism influences left ventricular energetics in vivo. Am J Physiol, 2000,278 :H1345-351.
  • 5Longnus SL, Wambolt RB, Barr RL, et al. Regulation of myocardial fatty acid oxidation by substrate supply. Am J Physiol Heart Circ Physiol, 2001,281 : H1561-H1567.

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