Helicobacter pylori surface proteins and enzymes and gastric mucosal surface (H. pylori-gastric interface)

Helicobacter pylori (H. pylori) surface proteins and enzymes, along with the gastric mucosal surface, represent the complex biological interface where this Gram-negative bacterium colonizes the human stomach. Key bacterial components include the enzyme urease, which is essential for neutralizing gastric acid by producing ammonia, and various adhesins like Blood group antigen-binding adhesin (BabA) that facilitate attachment to the gastric epithelium [Mobley HL, et al., Microbiol Rev, 1995; Ishijima N, et al., J Biol Chem, 2011]. The gastric mucosal surface serves as the host environment, where the bacteria reside within or beneath the mucus layer to evade host immune responses and acid [StatPearls, Helicobacter Pylori, 2023]. This interface is the primary site of action for multi-drug regimens designed to eradicate the infection and treat associated pathologies [Malfertheiner P, et al., Gut, 2022]. Therapeutic strategies typically involve a combination of antibiotics, such as clarithromycin and amoxicillin, and proton pump inhibitors (PPIs) that modify the gastric environment to enhance drug stability and efficacy [Graham DY, et al., Gut, 2010]. This target complex is central to the pathogenesis of chronic gastritis, peptic ulcer disease, and gastric adenocarcinoma [Polk DB, et al., Nat Rev Cancer, 2010]. Eradication of H. pylori from this mucosal interface is the gold standard for preventing disease recurrence and reducing cancer risk [Ford AC, et al., Cochrane Database Syst Rev, 2020]. Challenges in targeting this system include increasing antibiotic resistance and the protective nature of the gastric mucus layer [Thung I, et al., Aliment Pharmacol Ther, 2016].

Other names

H. pylori infection interfaceGastric-H. pylori interaction siteHelicobacter pylori virulence factorsGastric mucosal-H. pylori niche

Inhibition of bacterial cell wall synthesis, inhibition of bacterial protein synthesis, inhibition of bacterial DNA synthesis, inhibition of gastric acid secretion, and cytoprotective/antimicrobial effects.