Expression data from Helicobacter pylori-infected mouse gastric epithelial progenitor and non-progenitor cells.. Mus musculus

Helicobacter pylori clinical isolates can establish themselves in gastric epithelial stem cells and this interaction may have implications for gastric tumorigenesis. Mouse gastric epithelial progenitor cells (mGEPs) and non-progenitor gastric epithelial cells (npGECs) were infected for 24hrs with Helicobacter pylori clinical isolates Kx1 and Kx2. Kx1 was isolated from a patient with chronic atrophic gastritis (ChAG) and Kx2 from the same patient 4 years later, when he progressed to gastric adenocarcinoma. Keywords: RNA Expression Array Overall design: mGEPs and npGECs were seeded and grown to 70% confluency in RPMI1640 medium supplemented with 10% FBS before being infected with H. pylori strains Kx1 or Kx2 that had been grown to log phase. After 24h, media and non-attached bacteria were washed off and the cells harvested by trypsinization. RNA was prepared from triplicate cultures of mGEP cells infected with Kx1 or Kx2, npGECs infected with Kx1 or Kx2 and uninfected mGEPs and npGECs that served as controls.