Protective effects of hemin and tetrakis(4-benzoic acid)porphyrin on bacterial mutagenesis and mouse skin carcinogenesis induced by 7,12-dimethylbenz[a]anthracene

Won Yoon Chung, Jong Min Lee, Won Young Lee, Young Joon Surh, Kwang Kyun Park

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Porphyrins which are widespread in nature can interfere with the actions of certain carcinogens and mutagens, and have also been used clinically in photodynamic therapy (PDT) of tumors. Porphyrins such as chlorophyll, chlorophyllin (CHL) and hemin are known to inactivate various mutagens by forming complexes with them. Tetrakis(4-benzoic acid)porphyrin (TBAP) has been developed as a photosensitizer for PDT and its metal complex, MnTBAP has been shown to be efficacious in a variety of in vitro and in vivo oxidative stress models of human diseases. In the present study, we have found that TBAP and hemin exert concentration-related inhibition of his+ reversion in Salmonella typhimurium TA 100 induced by 7,12-dimethylbenz[a]anthracene (DMBA), and significantly reduced both incidence and multiplicity of skin tumors when topically applied prior to treatment of 12-O-tetradecanoylphorbol-13-acetate in female ICR mice. Covalent DNA binding of DMBA in mouse skin was also significantly inhibited by topical application of TBAP or hemin as well as CHL. These results suggest the chemopreventive potential of compounds containing a porphyrin nucleus. (C) 2000 Elsevier Science B.V.

Original languageEnglish
Pages (from-to)139-145
Number of pages7
JournalMutation Research - Genetic Toxicology and Environmental Mutagenesis
Issue number1-2
Publication statusPublished - 2000 Dec 20


All Science Journal Classification (ASJC) codes

  • Genetics
  • Health, Toxicology and Mutagenesis

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