Farnesoid X receptor signal is involved in deoxycholic acid-induced intestinal metaplasia of normal human gastric epithelial cells

Oncol Rep. 2015 Nov;34(5):2674-82. doi: 10.3892/or.2015.4207. Epub 2015 Aug 19.

Abstract

The farnesoid X receptor (FXR) signaling pathway is known to be involved in the metabolism of bile acid, glucose and lipid. In the present study, we demonstrated that 400 µmol/l deoxycholic acid (DCA) stimulation promotes the proliferation of normal human gastric epithelial cells (GES-1). In addition, DCA activated FXR and increased the expression of intestinal metaplasia genes, including caudal-related homeobox transcription factor 2 (Cdx2) and mucin 2 (MUC2). The treatment of FXR agonist GW4064/antagonist guggulsterone (Gug.) significantly increased/decreased the expression levels of FXR, Cdx2 and MUC2 protein in DCA-induced GES-1 cells. GW4064/Gug. also enhanced/reduced the nuclear factor-κB (NF-κB) activity and binding of the Cdx2 promoter region and NF-κB, the most common subunit p50 protein. Taken together, the results indicated that DCA is capable of modulating the expression of Cdx2 and the downstream MUC2 via the nuclear receptor FXR-NF-κB activity in normal gastric epithelial cells. FXR signaling pathway may therefore be involved in the intestinal metaplasia of human gastric mucosa.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • CDX2 Transcription Factor
  • Cell Line
  • Cell Proliferation / drug effects
  • Deoxycholic Acid / pharmacology*
  • Dose-Response Relationship, Drug
  • Epithelial Cells / cytology
  • Epithelial Cells / drug effects*
  • Epithelial Cells / metabolism
  • Gene Expression Regulation / drug effects
  • Homeodomain Proteins / genetics
  • Homeodomain Proteins / metabolism
  • Humans
  • Intestinal Mucosa / metabolism*
  • Intestines / cytology
  • Intestines / pathology
  • Isoxazoles / pharmacology
  • Metaplasia
  • Mucin-2 / genetics
  • Mucin-2 / metabolism
  • Receptors, Cytoplasmic and Nuclear / genetics
  • Receptors, Cytoplasmic and Nuclear / metabolism*
  • Signal Transduction / drug effects

Substances

  • CDX2 Transcription Factor
  • CDX2 protein, human
  • Homeodomain Proteins
  • Isoxazoles
  • MUC2 protein, human
  • Mucin-2
  • Receptors, Cytoplasmic and Nuclear
  • Deoxycholic Acid
  • farnesoid X-activated receptor
  • GW 4064