title: Innate recognition of microbial-derived signals in immunity and inflammation.
abstract: Microbes generate a vast array of different types of conserved structural components called pathogen-associated molecular patterns (PAMPs), which can be recognized by cells of the innate immune system. This recognition of "nonself" signatures occurs through host pattern recognition receptors (PRRs), suggesting that microbial-derived signals are good targets for innate immunity to discriminate between self- and nonself. Such PAMP-PRR interactions trigger multiple but distinct downstream signaling cascades, subsequently leading to production of proinflammatory cytokines and interferons that tailor immune responses to particular microbes. Aberrant PRR signals have been associated with various inflammatory diseases and fine regulation of PRR signaling is essential for avoiding excessive inflammatory immune responses and maintaining immune homeostasis. In this review we summarize the ligands and signal transduction pathways of PRRs and highlight recent progress of the mechanisms involved in microbe-specific innate immune recognition during immune responses and inflammation, which may provide new targets for therapeutic intervention to the inflammatory disorders.
authors.affiliation: Department of General Surgery, East Hospital, Tongji University School of Medicine, Shanghai, 200120, China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Department of General Surgery, East Hospital, Tongji University School of Medicine, Shanghai, 200120, China. liang2006718@sina.com.
authors.forename: Chunli
authors.initials: C
authors.lastname: Liang
mesh_terms: D056704:Adaptive Immunity / Q000276:immunology*; D016207:Cytokines / Q000276:immunology; D006706:Homeostasis / Q000276:immunology; D006801:Humans; D007113:Immunity, Innate / Q000276:immunology*; D007249:Inflammation / Q000276:immunology*; D064307:Microbiota / Q000276:immunology*; D018448:Models, Immunological; D051192:Receptors, Pattern Recognition / Q000276:immunology*; D015398:Signal Transduction / Q000276:immunology*
chemical_list: D016207:Cytokines; D051192:Receptors, Pattern Recognition
keywords: PRR signaling; immune regulation; inflammation; innate immunity; microbial-derived components