Helicobacter pylori surface antigens and urease (H. pylori antigens/urease)

Helicobacter pylori surface antigens and urease represent a complex of proteins essential for the survival, colonization, and pathogenicity of the H. pylori bacterium in the human stomach. Urease is a nickel-dependent enzyme that catalyzes the hydrolysis of urea into ammonia and carbon dioxide, effectively neutralizing gastric acid to create a habitable microenvironment for the bacteria (StatPearls, 2023). Surface antigens include adhesins like BabA and SabA, which facilitate attachment to the gastric epithelium, and major virulence factors such as CagA (Cytotoxin-associated gene A) and VacA (Vacuolating cytotoxin A) (PubMed, 2021). These components are primary targets for diagnostic tests, such as the urea breath test, and are the focus of vaccine development aimed at preventing chronic gastritis, peptic ulcers, and gastric cancer (NIH, 2022). Therapeutic strategies involve inhibiting urease activity or using bismuth-based compounds to disrupt bacterial cell wall integrity and adhesion (PubChem). This target entry is considered incorrect as a single molecular entity because it groups multiple distinct proteins with different functions into one category.

Other names

H. pylori virulence factorsHelicobacter pylori antigensUrease and outer membrane proteinsCagAVacABabASabA

Inhibition of the urease enzyme to prevent acid neutralization, blocking of bacterial adhesion to gastric mucosa, and induction of neutralizing antibodies against virulence factors.