Metabolism of the antibacterial triclocarban by human epidermal keratinocytes to yield protein adducts

Nils Helge Schebb, Bruce A. Buchholz, Bruce D. Hammock, Robert H. Rice

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Previous studies of triclocarban suggest that its biotransformation could yield reactive metabolites that form protein adducts. Since the skin is the major route of triclocarban exposure, present work examined this possibility in cultured human keratinocytes. The results provide evidence for considerable biotransformation and protein adduct formation when cytochrome P450 activity is induced in the cells by 2,3,7,8-tetrachlorodibenzo-p-dioxin, a model Ah receptor ligand. Since detecting low adduct levels in cells and tissues is difficult, we utilized the novel approach of accelerator mass spectrometry for this purpose. Exploiting the sensitivity of the method, we demonstrated that a substantial portion of triclocarban forms adducts with keratinocyte protein under the P450 inducing conditions employed.

Original languageEnglish (US)
Pages (from-to)230-234
Number of pages5
JournalJournal of Biochemical and Molecular Toxicology
Issue number6
StatePublished - Jun 2012


  • Accelerator mass spectrometry
  • Biotransformation
  • Cytochrome P450
  • Keratinocytes
  • Protein adducts
  • Reactive metabolites
  • TCDD
  • Triclocarban

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Molecular Medicine
  • Toxicology
  • Health, Toxicology and Mutagenesis


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