endothelium-dependent effect of sesame seed feeding on vascular reactivity of streptozotocin-diabetic rats: underlying mechanisms

نویسندگان

mehrdad roghani department of physiology, school of medicine and medicinal plant research center, shahed university, tehran, ir iran.

mohammad reza jalali nadoushan department of pathology, school of medicine, shahed university, tehran, ir iran.

tourandokht baluchnejadmojarad department of physiology, school of medicine, tehran university of medical sciences, tehran, ir iran.

mohammad reza vaez mahdavi department of physiology, school of medicine and medicinal plant research center, shahed university, tehran, ir iran.

چکیده

cardiovascular disorders continue to constitute major causes of morbidity and mortality in diabetic patients. in this study, the effect of chronic administration of sesame (sesamum indicum l) seed feeding was studied on aortic reactivity of streptozotocin (stz)-diabetic rats. male diabetic rats received sesame seed-mixed food at weight ratios of 3% and 6% for 7 weeks, one week after diabetes induction. contractile responses to kcl and phenylephrine (pe) and relaxation response to acetylcholine (ach) and sodium nitroprusside (snp) were obtained from aortic rings. maximum contractile response of endothelium-intact rings to pe was significantly lower in sesame-treated diabetic rats (at a ratio of 6%) relative to untreated diabetics and endothelium removal abolished this difference. endothelium-dependent relaxation to ach was also significantly higher in sesame-treated diabetic rats (at a ratio of 6%) as compared to diabetic rats and pretreatment of rings with nitric oxide synthase inhibitor, n(g)-nitro-l-arginine methyl ester (l-name) significantly attenuated the observed response. two-month diabetes also resulted in an elevation of malondialdehyde (mda) and decreased superoxide dismutase (sod) activity and sesame treatment significantly reversed the increased mda content and restored activity of sod. we thus conclude that chronic treatment of diabetic rats with sesame seed could in a dose- manner prevent some abnormal changes in vascular reactivity through nitric oxide and via attenuation of oxidative stress in aortic tissue and endothelium integrity is necessary for this beneficial effect.

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Endothelium-dependent Effect of Sesame Seed Feeding on Vascular Reactivity of Streptozotocin-diabetic Rats: Underlying Mechanisms

Cardiovascular disorders continue to constitute major causes of morbidity and mortality in diabetic patients. In this study, the effect of chronic administration of sesame (Sesamum indicum L) seed feeding was studied on aortic reactivity of streptozotocin (STZ)-diabetic rats. Male diabetic rats received sesame seed-mixed food at weight ratios of 3% and 6% for 7 weeks, one week after diabetes in...

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Endothelium-dependent Effect of Sesame Seed Feeding on Vascular Reactivity of Streptozotocin-diabetic Rats: Underlying Mechanisms

Cardiovascular disorders continue to constitute major causes of morbidity and mortality in diabetic patients. In this study, the effect of chronic administration of sesame (Sesamum indicum L) seed feeding was studied on aortic reactivity of streptozotocin (STZ)-diabetic rats. Male diabetic rats received sesame seed-mixed food at weight ratios of 3% and 6% for 7 weeks, one week after diabetes in...

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Endothelium-dependent Effect of Sesame Seed Feeding on Vascular Reactivity of Streptozotocin-diabetic Rats: Underlying Mechanisms

Cardiovascular disorders continue to constitute major causes of morbidity and mortality in diabetic patients. In this study, the effect of chronic administration of sesame (Sesamum indicum L) seed feeding was studied on aortic reactivity of streptozotocin (STZ)-diabetic rats. Male diabetic rats received sesame seed-mixed food at weight ratios of 3% and 6% for 7 weeks, one week after diabetes in...

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عنوان ژورنال:
iranian journal of pharmaceutical research

جلد ۱۲، شماره ۳، صفحات ۳۷۷-۳۸۵

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