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  • Title: Depression of cytochrome P450-dependent drug biotransformation by poly(rI.rC) and aspirin.
    Author: Jagota SK.
    Journal: Biochem Med Metab Biol; 1989 Jun; 41(3):212-6. PubMed ID: 2472829.
    Abstract:
    The inhibition of hepatic microsomal cytochrome P450 and cytochrome b5 levels by poly(rI.rC) and aspirin in vitro was studied in male Swiss mice. Poly(rI.rC) (10 mg/kg) decreases cytochrome P450 to a level of 61% and cytochrome b5 to 31%, while the activity of aminopyrine demethylase was decreased to 66%. Aspirin (200 mg/kg) decreased the level of cytochrome P450 and cytochrome b5 to 45 and 23%, respectively. Further studies on the effect of poly(rI.rC) showed that this decrease in the levels of cytochromes was mainly due to alteration in the protein synthesis of these hemoproteins.
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