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  • 标题:Effect of N-Nitrsodiethylamine on the Carcinogen-Activating and -Detoxifying Enzymes in Guinea Pigs Given Excessive Doses of Ascorbic Acid
  • 本地全文:下载
  • 作者:Krishan Lal KHANDUJA ; Sanjay KAPUR ; Ashwani KOUL
  • 期刊名称:Journal of Clinical Biochemistry and Nutrition
  • 印刷版ISSN:0912-0009
  • 电子版ISSN:1880-5086
  • 出版年度:1990
  • 卷号:8
  • 期号:3
  • 页码:201-207
  • DOI:10.3164/jcbn.8.201
  • 出版社:The Society for Free Radical Research Japan
  • 摘要:Guinea pigs given an adequate amount (2.0mg/100g/day) of ascorbic acid and treated with a potent chemical carcinogen, N-nitrosodiethylamine, showed significantly increased hepatic cytochrome P-450 levels without a change in arylhydrocarbon hydroxylase activity. In animals fed an excessive amount (50mg/100g/day) of ascorbic acid, N-nitrosodiethylamine administration significantly decreased hepatic and pulmonary arylhydrocarbon hydroxylase and cytochrome P-450 levels. However, the cytochrome c -reductase activity remained unaffected. Hepatic and pulmonary glutathione S-transferase and reduced glutathione levels responded differentially to N-nitrosodiethylamine challenge in the two groups of animals.
  • 关键词:ascorbic acid;N-nitrosodiethylamine;arylhydrocarbon hydroxylase;cytochrome P-450;glutathione S-transferase
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