Bacterial and other microbial cell-surface antigens

Bacterial and other microbial cell-surface antigens are a diverse group of molecules, including proteins, polysaccharides, and lipids, that reside on the outer boundary of pathogens (MDPI, 2023). These structures are vital for the microbe's structural stability and its ability to interact with the host environment through adhesion and immune evasion (Creative Biolabs, 2024). They serve as the primary interface for the host immune system and are the targets of numerous therapeutic interventions, ranging from traditional antibiotics to modern vaccines and monoclonal antibodies (Lumen Learning, 2024). Antibiotics like glycopeptides and polymyxins work by directly interfering with the synthesis or integrity of these surface components, such as peptidoglycan and lipopolysaccharide (Oregon State University, 2024). Vaccines utilize these antigens to elicit a memory immune response, while therapeutic antibodies can neutralize the pathogen or facilitate its destruction by immune cells (Drug Target Review, 2024). Despite their success, the development of drugs against these targets is complicated by the emergence of resistance mechanisms and the potential for off-target effects on the host's healthy microbiome (NIH, 2020).

Other names

Microbial surface antigensCell wall antigensSurface-exposed epitopesPathogen-associated molecular patternsPAMPsMicrobial surface components recognizing adhesive matrix moleculesMSCRAMMs

Inhibition of cell wall biosynthesis, disruption of membrane integrity, neutralization of surface proteins, and induction of opsonophagocytic immune responses.