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首页> 外文期刊>Journal of applied toxicology >-)Epigallocatechingallate protects the mitochondria against the deleterious effects of lipids, calcium and adenosine triphosphate in isoproterenol induced myocardial infarcted male Wistar rats.
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-)Epigallocatechingallate protects the mitochondria against the deleterious effects of lipids, calcium and adenosine triphosphate in isoproterenol induced myocardial infarcted male Wistar rats.

机译:-)表没食子儿茶素能保护线粒体免受异丙肾上腺素诱发的心肌梗塞雄性Wistar大鼠脂质,钙和三磷酸腺苷的有害作用。

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摘要

The present study was undertaken to evaluate the protective effect of (-)epigallocatechin gallate (EGCG) on mitochondrial lipids, lipid peroxides, Na(+)/K(+) ATPase, calcium and adenosine triphosphate in isoproterenol (ISO) induced myocardial infarction in male Wistar rats. Rats were pretreated with EGCG (30 mg kg(-1) body weight) orally using an intragastric tube daily for a period of 21 days. After that, ISO (100 mg kg(-1) body weight) was subcutaneously injected to rats at intervals of 24 h for two days. ISO induced rats showed significant increase in the levels of cholesterol, triglycerides and free fatty acids with subsequent decrease in the levels of phospholipids in mitochondrial fraction of the heart. ISO induction also caused significant increase in lipid peroxidation products (thiobarbituric acid reactive substances and lipid hydroperoxides) and significant decrease in the activity of Na(+)/K(+) ATPase in mitochondrial fraction of the heart. A significant increase in the levels of calcium andsignificant decrease in the levels of adenosine triphosphate were observed in ISO-induced mitochondrial heart. Prior treatment with EGCG (30 mg kg(-1)) significantly protected these alterations and maintained normal mitochondrial function. Thus, this study confirmed the protective effect of EGCG on mitochondria in experimentally induced cardiotoxicity in Wistar rats. Copyright (c) 2008 John Wiley & Sons, Ltd.
机译:本研究旨在评估(-)表没食子儿茶素没食子酸酯(EGCG)对异丙肾上腺素(ISO)诱发的心肌梗死中线粒体脂质,脂质过氧化物,Na(+)/ K(+)ATPase,钙和三磷酸腺苷的保护作用。雄性Wistar大鼠。使用EGCG(体重为30 mg kg(-1)体重),每天使用一条胃内导管对大鼠进行预处理,持续21天。之后,将ISO(100 mg kg(-1)体重)以24小时的间隔皮下注射给大鼠,持续两天。 ISO诱导的大鼠显示胆固醇,甘油三酸酯和游离脂肪酸的水平显着增加,随后心脏线粒体部分的磷脂水平降低。 ISO诱导还导致脂质过氧化产物(硫代巴比妥酸反应性物质和脂质氢过氧化物)显着增加,并且心脏线粒体部分的Na(+)/ K(+)ATPase活性大大降低。在ISO诱导的线粒体心脏中,钙水平显着增加,三磷酸腺苷水平显着下降。事先用EGCG(30 mg kg(-1))治疗可显着保护这些改变并维持正常的线粒体功能。因此,本研究证实了EGCG对线粒体在Wistar大鼠实验性心脏毒性中的保护作用。版权所有(c)2008 John Wiley&Sons,Ltd.

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