Innate immune recognition

CA Janeway Jr, R Medzhitov - Annual review of immunology, 2002 - annualreviews.org
CA Janeway Jr, R Medzhitov
Annual review of immunology, 2002annualreviews.org
The innate immune system is a universal and ancient form of host defense against infection.
Innate immune recognition relies on a limited number of germline-encoded receptors. These
receptors evolved to recognize conserved products of microbial metabolism produced by
microbial pathogens, but not by the host. Recognition of these molecular structures allows
the immune system to distinguish infectious nonself from noninfectious self. Toll-like
receptors play a major role in pathogen recognition and initiation of inflammatory and …
The innate immune system is a universal and ancient form of host defense against infection. Innate immune recognition relies on a limited number of germline-encoded receptors. These receptors evolved to recognize conserved products of microbial metabolism produced by microbial pathogens, but not by the host. Recognition of these molecular structures allows the immune system to distinguish infectious nonself from noninfectious self. Toll-like receptors play a major role in pathogen recognition and initiation of inflammatory and immune responses. Stimulation of Toll-like receptors by microbial products leads to the activation of signaling pathways that result in the induction of antimicrobial genes and inflammatory cytokines. In addition, stimulation of Toll-like receptors triggers dendritic cell maturation and results in the induction of costimulatory molecules and increased antigen-presenting capacity. Thus, microbial recognition by Toll-like receptors helps to direct adaptive immune responses to antigens derived from microbial pathogens.
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