Keywords: گیرنده CCK-B; G17DT; CCK-B Receptor; Proton Pump Inhibitors; PPIs; CCK-BR; cholecystokinin-B receptor; ECL; enterochromaffin-like; EGFR; epidermal growth factor receptor; ERK; extracellular signal-regulated kinase; HER2; human epidermal growth factor receptor 2; IHC;