Inhibition of enzymes of drug metabolism in rat liver by ultrasound and correction by heparin.

After 6 days following the local effect (during operation) of ultrasound (2 Wt/cm2, 1 min) the microsomal fraction showed decreased total content of cytochromes P-450 (P-450), rate of NADPH oxidation, activity of NADPH-cytochrome P450 reductase and P450 IIE1 (aniline as substrate) by 40, 28, 16 and 42 %, respectively. In addition, after 12 days the activities of P450 IIIA1 (ethylmorphine as substrate) and cytosolic sulphobromophthalein glutathione transferase (SBPh-GT) were decreased by 59 and 26 %. The administration of heparin (intramuscularly, 250 ED/kg, in a day, 3 and 6 times) exerted a normalizing effect.

[The effect of heparin on the activity of the mono-oxygenase glucuronyl- and glutathione transferase systems in ultrasonic damage to the rat liver].

Six days after local exposure of the rat liver (during operation) to ultrasound (2 W/cm2, 1 min), the cytochrome P-450 content in the microsomal fraction reduced, and the rate of NADPH oxidation, the NADPH cytochrome P-450 reductase activity, ethylmorphine demethylation and aniline hydroxylation decreased in 12 days the activity of NADPH-cytochrome b5 reductase and cytosol sulfobromophthalein-glutathione-S-transferase also reduced. Heparin administration (250 U/kg i.m.