Pseudomonas aeruginosa outer membrane proteins and other surface antigens (P. aeruginosa OMPs)

Pseudomonas aeruginosa outer membrane proteins (OMPs) and surface antigens represent a broad category of molecular structures essential for the survival, environmental adaptation, and pathogenicity of this Gram-negative bacterium. This group includes major porins such as OprF, which maintains cell shape and mediates adhesion, as well as lipoproteins like OprI and various components of efflux systems that contribute to antibiotic resistance (UniProt, 2024). These surface-exposed molecules are critical for nutrient acquisition and serve as the primary interface between the pathogen and the host immune system. Consequently, they are major targets for therapeutic intervention, including the development of subunit vaccines and monoclonal antibodies designed to neutralize virulence or promote bacterial clearance (NIH, 2023). However, the therapeutic utility of these targets is often challenged by the bacterium's high genomic plasticity, which allows for frequent modifications of surface expression profiles, leading to immune evasion and reduced drug permeability (PubMed, PMID: 30245130).

Other names

Pseudomonas surface antigensP. aeruginosa outer membrane proteinsOuter membrane porinsBacterial surface antigensOMPs

Drugs targeting these antigens work through various mechanisms: monoclonal antibodies (e.g., MEDI3902) neutralize virulence factors like PcrV and Psl to prevent host cell damage and promote opsonophagocytosis (PubMed, PMID: 27535424); polymyxins (e.g., Colistin) bind to lipopolysaccharides (LPS) to disrupt membrane integrity (StatPearls, 2024); and vaccines induce protective IgG antibodies against porins like OprF and OprI to facilitate immune clearance (PubMed, PMID: 25225300).