BACKGROUND/AIM Helicobacter pylori, a gram-negative bacterium, causes chronic stomach diseases in humans. Heat shock proteins (HSPs) are involved in cell integrity, cell growth, and gastric mucosa colonization by H. pylori. This study aimed to investigate HSP expression levels in H. pylori-infected gastric adenocarcinoma AGS cells. MATERIALS AND METHODS We determined protein expression levels using iTRAQ proteomics analysis. We analyzed the possible network interactions for H. pylori targets in AGS cells using the Ingenuity Pathway Analysis (IPA) software. RESULTS H. pylori-infected AGS cells potentially targeted EIF2 and BAG2 signaling pathways to regulate cell physiology. In addition, after 3, 6, and 12 h of infection, western blotting revealed significantly decreased HSP70 and HSP105 expression. CONCLUSION H. pylori decreases HSPs in AGS gastric adenocarcinoma cells, and this is associated with the regulation of EIF2 and BAG2 signaling pathways.
Helicobacter pylori Targets in AGS Human Gastric Adenocarcinoma: In Situ Proteomic Profiling and Systematic Analysis.