Diallyl disulfide inhibits N-acetyltransferase activity and gene expression in human esophagus epidermoid carcinoma CE 81T/VGH cells

Fu Shun Yu, Chun Shu Yu, Jing Pin Lin, Ssu Ching Chen, Wan Wen Lai, Jing Gung Chung

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

Individuals can be classified into rapid or slow acetylators based on the N-acetyltransferase (NAT) activity which is believed to affect cancer risk that is related to environmental carcinogen exposure. Diallyl disulfide (DADS) is a naturally occurring organosulfur compound, from garlic (Allium sativum), which exerts anti-neoplasm activity. In this study, we investigated the inhibitory effects of DADS on NAT activity and gene expresseion (NAT mRNA) in human esophagus epidermoid carcinoma CE 81T/VGH cells. NAT activity was measured by the amounts of N-acetylation of 2-aminofluorene (AF) and non-acetylation of AF by high performance liquid chromatography on cells treated with or without DADS. The amounts of NAT enzymes were examined and analyzed by Western blot. NAT gene expression (NAT mRNA) was examined by polymerase chain reaction and cDNA microarray. DADS decreased the amount of N-acetylation of AF in human esophagus epidermoid carcinoma CE 81T/VGH cells in a dose-dependent manner. Western blot analysis indicated that DADS decreased the levels of NAT protein in CE 81T/VGH cells. PCR and cDNA microarray experiments showed that DADS affected NAT1 mRNA expression in CE 81T/VGH cells. DADS affect NAT activity due to the inhibition of gene expression (NAT1 mRNA) and the decreasing of the protein levels of NAT in CE 81T/VGH cells.

Original languageEnglish
Pages (from-to)1029-1036
Number of pages8
JournalFood and Chemical Toxicology
Volume43
Issue number7
DOIs
StatePublished - Jul 2005

Keywords

  • 2-Aminofluorene (AF)
  • cDNA microarray
  • Diallyl disulfide (DADS)
  • Human esophagus epidermoid carcinoma CE 81T/VGH cells
  • N-acetyltransferase (NAT)

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