Pathogen-associated molecular pattern (PAMP) (PAMP)

Pathogen-associated molecular patterns (PAMPs) are a diverse group of conserved molecular structures produced by microorganisms that are recognized by the host's innate immune system [Janeway's Immunobiology, 2016]. These molecules, which include lipopolysaccharides (LPS) from Gram-negative bacteria, peptidoglycans from Gram-positive bacteria, and double-stranded RNA from viruses, are essential for the survival or replication of the pathogens [Nature Reviews Immunology, 2011]. Recognition of PAMPs is mediated by Pattern Recognition Receptors (PRRs), such as Toll-like receptors (TLRs), which are expressed on the surface or in the endosomes of immune cells like macrophages and dendritic cells [StatPearls, 2023]. This interaction triggers intracellular signaling pathways that lead to the production of pro-inflammatory cytokines and the maturation of the adaptive immune response [NIH, 2022]. In clinical practice, PAMPs are significant as they can trigger systemic inflammatory responses leading to sepsis if not properly regulated [Clinical Microbiology Reviews, 2009]. Conversely, synthetic analogs of PAMPs are frequently employed as vaccine adjuvants to enhance the magnitude and duration of the immune response against specific antigens [Frontiers in Immunology, 2020].

Other names

PAMPsMicrobe-associated molecular patternsMAMPsPathogen-derived molecular patterns

Activation of Pattern Recognition Receptors (PRRs) to stimulate innate and adaptive immune responses.