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Regulation of the Binding of C3‐Coated Particles to Human Lymphocytes by Human Complement Component H *
Author(s) -
FONTAINE M.,
DAVEAU M.,
GILBERT D.
Publication year - 1983
Publication title -
scandinavian journal of immunology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.934
H-Index - 88
eISSN - 1365-3083
pISSN - 0300-9475
DOI - 10.1111/j.1365-3083.1983.tb00813.x
Subject(s) - ic3b , complement (music) , complement system , complement receptor , immune system , chemistry , cleavage (geology) , endogeny , biophysics , microbiology and biotechnology , receptor , immunology , biology , biochemistry , paleontology , complementation , fracture (geology) , gene , phenotype
Human complement component H was found to modify greatly the binding of C3‐coated particles to lymphocytes. We used an experimental model in which lymphocytes were mixed successively with various amounts of H and C3b‐coated erythrocytes. At least three mechanisms were postulated to interpret the phenomenon: (i) release of endogenous I by lymphocytes triggered by H through specific binding sites, (ii) cleavage of iC3b by I, promoted by complement receptor type one, and (iii) inhibiiion of immune adherence by H. Such qualitative and quantitative changes in C3‐coated particle recognition by the binding sites might mediate important functions of lymphocytes.