Xenobiotic-metabolizing enzymes and benzo[a]pyrene metabolism in the benzo[a]pyrene-sensitive mutant strain of Drosophila simulans

S. Yu Fuchs, V. S. Spiegelman, R. D. Safaev, G. A. Belitsky

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

Basal levels of aryl hydrocarbon hydroxylase, epoxide hydrolase and glutathione S-transferase enzyme activities, cytochrome P-450 content and inducibility of enzymes with phenobarbital were found to be similar in the microsomes of D. simulans mutant strain 364 yv, which is sensitive to the toxic and mutagenic effects of benzo[a]pyrene (BP), and of the wild resistant Turku strain. In contrast, increases in the rate of BP turnover per molecule of cytochrome P-450, intensity of the hemoprotein band with apparent molecular weight 56,000 and the yield of BP 7,8-dihydrodiol and 9,10-dihydrodiol occurred only in microsomes of BP-pretreated 364yv flies but not of Turku ones. It is likely that BP induces an aberrant form of cytochrome P-450 in 364yv flies with a rare mutation in one of the P-450 regulating genes.

Original languageEnglish (US)
Pages (from-to)185-191
Number of pages7
JournalMutation Research - Fundamental and Molecular Mechanisms of Mutagenesis
Volume269
Issue number2
DOIs
StatePublished - Oct 1992

All Science Journal Classification (ASJC) codes

  • Molecular Biology
  • Genetics
  • Health, Toxicology and Mutagenesis

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