Effects of Pregnenolone-16α-Carbonitrile on Vitamin E Status and Protein Levels of Antioxidant Enzymes in Male Rats Fed a Vitamin E-Supplemented Diet

doi:10.1179/135100009X392494

CNU IR > Pharmacy and Science > Dept. of Health and Nutrition (including master's program) > Periodical Articles > Item 310902800/23212

Please use this identifier to cite or link to this item: https://ir.cnu.edu.tw/handle/310902800/23212

Title:	Effects of Pregnenolone-16α-Carbonitrile on Vitamin E Status and Protein Levels of Antioxidant Enzymes in Male Rats Fed a Vitamin E-Supplemented Diet
Authors:	Huey-Mei Shaw Wan-Hsuan Chen
Contributors:	保健營養系
Keywords:	α-tocopherol TBARS antioxidant enzyme cytochrome P450 rat
Date:	2009-04
Issue Date:	2010-11-12 16:11:27 (UTC+8)
Abstract:	The aim of this study was to evaluate the effects of the administration of pregnenolone-16α-carbonitrile (PCN), an inducer of the cytochrome P450 3A gene in rats, on vitamin E status and antioxidant enzyme protein levels in rats fed a vitamin E-supplemented diet. Two groups of male Wistar rats were fed for 3 weeks with a basal diet containing 50 ppm of α-tocopherol or the same diet containing 10 times more α-tocopherol. In the final 3 days, each group was divided into two subgroups which were given a single daily intraperitoneal injection of PCN at 75 mg/kg (groups PCN and PCN+VE) or DMSO (groups DS and DS+VE). PCN treatment alone significantly reduced the α-tocopherol content of the liver and plasma and this effect was prevented by supplementation with 10-fold more α-tocopherol. α-Tocopherol levels in the kidneys, lung, heart, and testes were significantly higher in both vitamin E-supplemented groups than in the control groups. TBARS levels in the liver and lung were significantly increased in both PCN-treated groups, as shown by two-way ANOVA analysis. PCN also caused a significant reduction in protein levels of catalase and glutathione peroxidase (GPx) in both groups. Dietary vitamin E supplementation caused a decrease in liver protein levels of GPx and superoxide dismutase, but not catalase, in both groups and protected against PCN-induced lipid peroxidation, which was caused by CYP3A induction and a reduction in antioxidant enzyme levels.
Relation:	Redox Report 14(2)：p.61-38
Appears in Collections:	[Dept. of Health and Nutrition (including master's program)] Periodical Articles

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