Lack of RUNX3 regulation in human gastric cancer

J Pathol. 2006 Oct;210(2):141-6. doi: 10.1002/path.2042.


It has been proposed that the transcription factor RUNX3 is the product of a gastric tumour suppressor gene. We examined RUNX3 expression in gastric biopsies from 105 patients with different histological presentations. Surprisingly, immunohistochemical staining detected RUNX3 protein expression only in infiltrating leukocytes but not in the gastric epithelium. Using laser capture microdissection and quantitative reverse transcription-polymerase chain reaction, we confirmed that the level of RUNX3 mRNA expression in the gastric epithelium was very low and was influenced neither by H. pylori infection nor by neoplastic transformation. Instead, RUNX3 was highly expressed in the gastric stroma and the level of expression correlated with the magnitude of H. pylori-induced gastric inflammation. The low level of RUNX3 expression in gastric epithelium and the absence of downregulation in gastric cancer do not support the hypothesis that RUNX3 functions as a gastric tumour suppressor gene.

MeSH terms

  • Adenocarcinoma / metabolism*
  • Adenocarcinoma / pathology
  • Adolescent
  • Adult
  • Aged
  • Aged, 80 and over
  • Biopsy
  • Cell Transformation, Neoplastic / metabolism
  • Core Binding Factor Alpha 3 Subunit / biosynthesis*
  • Core Binding Factor Alpha 3 Subunit / genetics
  • Down-Regulation
  • Female
  • Gastric Mucosa / metabolism
  • Gene Expression Regulation, Neoplastic*
  • Helicobacter Infections / complications
  • Helicobacter Infections / metabolism
  • Helicobacter pylori
  • Humans
  • Leukocytes / metabolism
  • Male
  • Microdissection / methods
  • Middle Aged
  • Neoplasm Proteins / biosynthesis*
  • Neoplasm Proteins / genetics
  • Neoplasm Staging
  • RNA, Messenger / genetics
  • RNA, Neoplasm / genetics
  • Reverse Transcriptase Polymerase Chain Reaction / methods
  • Stomach Neoplasms / metabolism*
  • Stomach Neoplasms / pathology


  • Core Binding Factor Alpha 3 Subunit
  • Neoplasm Proteins
  • RNA, Messenger
  • RNA, Neoplasm