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논문 기본 정보

자료유형
학술저널
저자정보
Abdelrahman, Aly M (Department of Pharmacology & Clinical Pharmacy, College of Medicine & Health Sciences, Sultan Qaboos University) Suleimani, Yousuf M Al (Department of Pharmacology & Clinical Pharmacy, College of Medicine & Health Sciences, Sultan Qaboos University)
저널정보
대한약학회 Archives of pharmacal research : a publication of the Pharmaceutical Society of Korea Archives of pharmacal research : a publication of the Pharmaceutical Society of Korea 제31권 제12호
발행연도
2008.1
수록면
1,584 - 1,589 (6page)

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The aim of this study was to examine the effect of chronic administration of nimesulide, a cyclooxygenase-2 inhibitor, on endothelial dysfunction in streptozotocin-induced diabetic rats. Three groups of Sprague-Dawley rats (300-350 g, n = 6) were used. The first group served as normoglycemic control and the second and third groups were rendered diabetic by an intraperitoneal injection of streptozotocin (60 mg/kg). The third group received the selective COX-2 inhibitor, nimesulide (20 mg/kg/day), orally by gavage for 4 weeks while the second group received only drinking water and served as diabetic control. At the end of the treatment period, the rats were anesthetized with urethane (1.2 g/kg) and mean arterial pressure, heart rate and hindlimb blood flow were monitored. This was followed by the injection of acetylcholine (endothelium-dependent vasodilator, $0.1-0.8{\mu}g/kg$) and sodium nitroprusside (endothelium-independent vasodilator $1-4{\mu}g/kg$). Mean arterial pressure was significantly reduced and hindlimb vascular conductance was not significantly affected in the control diabetic group when compared to the normoglycemic control group. Nimesulide treatment did not cause any significant change in any of the measured hemodynamic parameters. Acetylcholine and sodium nitroprusside induced dose-dependent increases in hindlimb vascular conductance in control normoglycemic rats which were attenuated in diabetic control rats. Nimesulide reversed the attenuation of acetylcholine-induced increase in hindlimb vascular conductance. In conclusion, chronic administration of the selective COX-2 inhibitor, nimesulide improved endothelial dysfunction in the hindlimb vasculature of streptozotocin induced diabetic rats. This suggests that COX-2 products might be involved in the pathogenesis of endothelial dysfunction in streptozotocin-induced diabetic rats.

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