[Effect of HF on the hepatic metabolism of dimethylnitrosamine in the rat].

G Bompart, H Dophuoc, P Bourbon
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引用次数: 0

Abstract

The authors have studied the action of fluorine, administered by inhalation, on the liver metabolism of a chemical carcinogen: dimethylnitrosamine (DMN). The results demonstrate a decrease in the level of cytochrome P450 and in the activity of benzo(a)pyrene hydroxylase in animals treated with DMN or DMN + HF. The greater inhibition in the presence of HF is paralleled by a decrease in the weight of the liver and in the synthesis of liver microsomal proteins. This reduction of activity (with the exception of dimethylnitrosamine demethylase which is unaffected) is supported by the result of the histological examinations showing two different types of lesion-necrotic toxic hepatitis and post-hepatitic cirrhosis - the frequency of which is much higher in the presence of fluorine.

[HF对大鼠肝脏二甲基亚硝胺代谢的影响]。
作者研究了吸入氟对化学致癌物二甲基亚硝胺(DMN)肝脏代谢的作用。结果表明,DMN或DMN + HF处理的动物细胞色素P450水平和苯并(a)芘羟化酶活性降低。在HF存在时,更大的抑制作用与肝脏重量和肝微粒体蛋白合成的减少相平行。这种活性降低(不受影响的二甲基亚硝胺去甲基化酶除外)得到组织学检查结果的支持,组织学检查显示有两种不同类型的病变——坏死性中毒性肝炎和肝炎后肝硬化——在氟存在的情况下发生的频率要高得多。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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