title: Quantitation of red cell-bound immunoglobulin and complement using enzyme-linked antiglobulin consumption assay.
abstract: Various techniques have been described for quantitating IgG or complement (C3) on red cells (RBCs). The techniques either are cumbersome, as the complement consumption test, or use radioactivity. This paper describes an antiglobulin consumption assay using an enzyme-linked immunosorbent method that can be used to quantitate IgG, IgM, and C3. With this technique RBCs from normal, healthy donors gave a mean value of 106 +/- 60 molecules of IgG per RBC, 4.5 +/- 3 molecules of IgM per RBC, and 37 +/- 28 molecules of C3 per RBC, respectively. The RBCs of hospital patients, particularly of those with infections or inflammatory conditions, contain increased amounts of nonspecifically bound immunoproteins. The availability of a common method to quantitate RBC-associated IgG, IgM, and C3 allows easy monitoring or study of the immune mechanism of autoimmune hemolytic anemia.
authors.affiliation: Department of Paediatrics, National University of Singapore.
authors.forename: R
authors.initials: R
authors.lastname: Kiruba
authors.forename: P
authors.initials: P
authors.lastname: Han
mesh_terms: D000328:Adult; D000744:Anemia, Hemolytic, Autoimmune / Q000097:blood; D000818:Animals; D001790:Blood Physiological Phenomena; D003176:Complement C3 / Q000032:analysis*; D003298:Coombs Test; D004797:Enzyme-Linked Immunosorbent Assay; D004912:Erythrocytes / Q000378:metabolism*; D005260:Female; D005312:Fetal Blood / Q000032:analysis; D006801:Humans; D007074:Immunoglobulin G / Q000032:analysis*; D007075:Immunoglobulin M / Q000032:analysis*; D008297:Male; D008875:Middle Aged; D011817:Rabbits
chemical_list: D003176:Complement C3; D007074:Immunoglobulin G; D007075:Immunoglobulin M