title: Early- and late-phase activation of complement evaluated by plasma levels of C3d,g and the terminal complement complex.
abstract: Activation of the initial part (early phase) and terminal part (late phase) of the complement cascade was examined. C3d,g and the fluid-phase terminal complement complex were quantified and compared after spontaneous in vitro activation and after acute in vivo activation caused by extracorporeal circulation during coronary artery surgery. The results suggest that there is a close but not complete correlation between early- and late-phase activation of complement, that C3d,g and the terminal complement complex have different elimination rates in vivo, and that these two indicators are valuable for evaluation of early- and late-phase activation, respectively.
mesh_terms: D003167:Complement Activation; D003176:Complement C3 / Q000378:metabolism*; D003179:Complement C3b; D015933:Complement C3d; D015938:Complement Membrane Attack Complex; D003165:Complement System Proteins / Q000378:metabolism*; D001026:Coronary Artery Bypass; D003327:Coronary Disease / Q000276:immunology / Q000601:surgery; D005112:Extracorporeal Circulation; D006801:Humans; D066298:In Vitro Techniques; D008297:Male; D008875:Middle Aged; D013997:Time Factors
chemical_list: D003176:Complement C3; D015938:Complement Membrane Attack Complex; C034772:complement C3g; D003179:Complement C3b; D015933:Complement C3d; D003165:Complement System Proteins