Substance that binds to the surface of a particle and enhances the uptake of the particle by a phagocyte. Probably the most important in mammals derive from complement (C3b or C3bi) or immunoglobulins (which are bound through the Fc receptor).

Dictionary of molecular biology. 2004.

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  • opsonin — opsònīn m <G opsonína> DEFINICIJA fiziol. antitijelo koje kao dio krvne tekućine omogućuje bijelim krvnim zrncima uništavanje mikroba koji su prodrli u organizam, na čemu se temelji cijepljenje ETIMOLOGIJA grč. ópson: hrana + in …   Hrvatski jezični portal

  • opsonin — [äp′sə nin] n. [obs. opson(ium), relish (< L < Gr opsōnion, food, provisions < opsōnein, to buy food < opson, meat or any food eaten with bread < o , together with + * psōn, food, bread, akin to psōmos, mouthful) + IN1] a substance …   English World dictionary

  • Opsonin — Action of opsonins; a phagocytic cell recognises the opsonin on the surface of an antigen An opsonin is any molecule that targets an antigen for an immune response. However, the term is usually used in reference to molecules that act as a binding …   Wikipedia

  • opsonin — noun Etymology: Latin opsonare to buy provisions, cater (from Greek opsōnein) + English 1 in more at oligopsony Date: 1903 any of various proteins (as antibodies or complement) that bind to foreign particles and cells (as bacteria) making them… …   New Collegiate Dictionary

  • Opsonin — Opsonine sind im Körper vorkommende Proteine, die einen Teil der Immunantwort darstellen. Opsonine können entweder Antikörper oder Komplementfaktoren sein, die die Verknüpfung von Phagozyten an Bakterienzellen oder andere Mikroorganismen… …   Deutsch Wikipedia

  • opsonin — opsonoid, adj. /op seuh nin/, n. Immunol. a constituent of normal or immune blood serum that makes invading bacteria more susceptible to the destructive action of the phagocytes. [1900 05; < L opson(ium) victuals ( < Gk opsonía, deriv. of… …   Universalium

  • opsonin — noun Any antibody that causes an invading species to be more susceptible to phagocytosis …   Wiktionary

  • opsonin — Any blood serum protein that binds to antigens, enhancing phagocytosis ( e.g., C3b of the complement system, specific antibodies). [G. opson, boiled meat, provisions, fr. hepso, to boil, + in] common o. SYN: normal o.. immune o …   Medical dictionary

  • Opsonin — Op|so|nin [griech. ópson = Fleisch, Speise; ↑ in (3)], das; s, e: veralteter Name für ↑ Fibronectine, deren Anbindung an eingedrungene Bakterien oder Zellen man als Opsonierung bezeichnete. * * * Op|so|nin, das; s, e <meist Pl.> [zu griech …   Universal-Lexikon

  • Opsonin — Op|so|nin 〈n.; Gen.: s, Pl.: e; Med.; meist Pl.〉 körpereigener Stoff, der sich zur Infektionsabwehr an die eingedrungenen Bakterien, Pilze u. Ä. anlagert …   Lexikalische Deutsches Wörterbuch

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