Comparison of the skin tumor initiating activity of 3-methylcholanthrene and 3,11-dimethylcholanthrene in mice

T. J. Slaga, G. L. Gleason, L. Hardin

Research output: Contribution to journalArticle

10 Scopus citations


The abilities of 3-methylcholanthrene (3-MC) and 3,11-dimethylcholanthrene (3,11-DMC) to initiate skin tumors in Sencar mice were determined by using a 2-stage system of tumorigenesis. 3,11-DMC was found to have very weak skin tumor initiating activity when compared to the potent activity of 3-MC. The only difference between 3-MC and 3,11-DMC is the substitution of a methyl group in position 11 which is part of the 'K-region' or the 'peri' position. From these results, we suggest that an unhindered peri position adjacent to an angular benzene ring is necessary for carcinogenic activity of 3-MC.

Original languageEnglish (US)
Pages (from-to)97-102
Number of pages6
JournalCancer Letters
Issue number2-3
StatePublished - Jul 1979
Externally publishedYes


ASJC Scopus subject areas

  • Oncology
  • Cancer Research

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