Trichloroethylene(TRI) is one of the most widely used organic solvent in many industries. It is used a degreasing agent, extract and dillution solvents. TRI is metabolized by liver microsomal cytochrome P450 to reactive intermediates, which are
considered responsible for its hepatotoxicity. Cytochrome P450 is a key enzyme in the first step of TRI metabolism resulting in chloral hydrate(CH) formation, which is a rate-limiting step in TRI metabolism. This study was perfomed to find out
the
change of hepatic cytochrome P450 levels and of electron transport system for P-450 dependent reaction. Intraperitoneal injections of TRI were done to the male Sprague Dawley rats(mean body wights, 170±10g) in corn oil at the dosage of 150, 300,
600
mg/kg for 2 days.
@ES The results of experiments are following;
@EN 1. The contents of microsomal protein, cytochrome P450 and b5 are tended to be decreased with increasing amount of TRI, but not significantlly(p>0.05).
2. The activity of NADPH-cytochrome P450 reductase is slowly decreased by increasing amount of TRI, but not significantlly(P>0.05). On the other hand, the activity of NADHb5 reductase is increased with increasing amount of TRI(p<0.05).
3. The activity of 7-ethoxyresolufin O-deethylase did not show any critical changes(P>0.05). This results suggests that the inductive pattern of TRI may not be related to P 450A1 and P450IIB.
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