Helicobacter pylori outer-membrane and surface antigens (H. pylori OMPs)

Helicobacter pylori outer-membrane and surface antigens are a diverse array of proteins and lipopolysaccharides that reside on the bacterial surface. These molecules are critical for the pathogen's ability to survive the acidic environment of the stomach and colonize the gastric mucosa. Key components include adhesins like Blood group antigen-binding adhesin (BabA), which facilitate high-affinity binding to host cells (PubMed: 9488644). They also include porins and transport proteins that manage nutrient uptake and the secretion of virulence factors such as Vacuolating cytotoxin A (VacA) (PubMed: 23022316). As the primary interface with the host, these antigens are the focus of diagnostic assays, such as the stool antigen test used in clinical practice (StatPearls: NBK544250). In therapeutic development, these surface proteins are targeted by experimental vaccines designed to induce mucosal immunity and prevent bacterial attachment (PubMed: 30254321). Some drugs, like bismuth-based compounds, interact with these surface structures to exert antimicrobial effects and disrupt biofilm formation. Understanding the variability of these antigens is essential for overcoming challenges related to strain diversity and immune evasion in H. pylori infections.

Other names

H. pylori surface proteinsOuter membrane proteins of Helicobacter pyloriH. pylori adhesinsH. pylori antigens

Neutralization of bacterial toxins and inhibition of bacterial adhesion to the gastric mucosa (PubMed: 30254321).