Evaluation of the mutagenic effects of myosmine in human lymphocytes using the HPRT gene mutation assay

J. B. Havla, C. E. Hill, S. Z. Abdel-Rahman, E. Richter

Research output: Contribution to journalArticle

12 Scopus citations


The minor tobacco alkaloid myosmine is implicated in DNA damage through pyridyloxobutylation similar to the tobacco-specific nitrosamines (TSNA). In contrast to TSNA, occurrence of myosmine is not restricted to tobacco. Myosmine is genotoxic to human cells in the comet assay. In this study, the mutagenic effect of myosmine was evaluated using the cloning hypoxanthine-guanine phosphoribosyltransferase (HPRT) gene mutation assay. Four hour exposure of isolated peripheral blood lymphocytes from 14 subjects homozygous for the Leu84 wild-type of the O6-methylguanine-DNA-methyltransferase (MGMT) gene to 1 mM of myosmine increased mutant frequency from 0.73 ± 0.58 × 10-6 in control to 1.14 ± 0.89 × 10-6 lymphocytes (P < 0.05). These new data further confirm the mutagenic effects of myosmine.

Original languageEnglish (US)
Pages (from-to)237-241
Number of pages5
JournalFood and Chemical Toxicology
Issue number1
StatePublished - Jan 1 2009



  • HPRT mutation assay
  • Human lymphocytes
  • Myosmine

ASJC Scopus subject areas

  • Food Science
  • Toxicology

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