In vitro effects of l-ascorbic acid (vitamin C) on aryl hydrocarbon hydroxylase activity in hepatic microsomes of mice

Chikako Kiyohara, Minoru Omura, Tomio Hirohata

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5 Citations (Scopus)


When aromatic hydrocarbon (Ah)-responsive and -non-responsive strains of mice were pretreated with 3-methylcholanthrene (MC) or 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), vitamin C reduced the microsomal aryl hydrocarbon hydroxylase (AHH) activity. The AHH inhibitors 7,8-benzoflavone (7,8-BF) and 3-methylsulfonyl-3′,4,4′,5-tetrachlorobiphenyl (3-MSF-3′,4,4′,5-tetraCB) showed various inhibitory effects depending upon the types of microsomes, whereas vitamin C exhibited inhibition irrespective of the types of microsomes. 7,8-BF and 3-MSF-3′,4,4′,5-tetraCB as well as vitamin C suppressed the reverse mutation of the Salmonella typhimurium tester strains TA98 and TA100 induced by benzo[a]pyrene.

Original languageEnglish
Pages (from-to)227-232
Number of pages6
JournalMutation Research - Fundamental and Molecular Mechanisms of Mutagenesis
Issue number2
Publication statusPublished - Dec 1991


All Science Journal Classification (ASJC) codes

  • Molecular Biology
  • Genetics
  • Health, Toxicology and Mutagenesis

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