Nafenopin, a peroxisome proliferator, depletes hepatic vitamin E content and elevates plasma oxidised glutathione levels in rats
1989; Elsevier BV; Volume: 45; Issue: 2-3 Linguagem: Inglês
10.1016/0378-4274(89)90013-1
ISSN1879-3169
AutoresBrian G. Lake, Tim J.B. Gray, Sally A. Körösi, D. Gareth Walters,
Tópico(s)Drug-Induced Hepatotoxicity and Protection
ResumoMale Sprague-Dawley rats were given oral doses of nafenopin (80 mg/kg/d) for up to 28 d. Nafenopin administration resulted in liver enlargement and induction of peroxisomal fatty acid beta-oxidation enzymes (which generate hydrogen peroxide), but little effect was observed on catalase and cytosolic GSH peroxidase was decreased. Hepatic vitamin E levels were depleted to around 50% of control. A small increase in hepatic oxidised glutathione (GSSG) content was paralleled in a time-dependent increase in plasma GSSG. These changes in vitamin E and GSSG levels may represent early indicators of oxidative stress produced in rat hepatocytes by nafenopin and other peroxisome proliferators as a consequence of the increased production of hydrogen peroxide.
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