title: Absence of complement activation in vitro by sodium meglumine ioxitalamate.
abstract: The effect of radiographic contrast media on proteins of the complement system in vitro was investigated using protein level measurement and crossed immunoelectrophoresis. Despite the 20% loss of total serum hemolytic activity (CH50) induced by sodium meglumine ioxitalamate (0.5 M), no significant changes in C3c, C3N or B were detected by radial immunodiffusion. These contrast media did not cause electrophoretic conversion of C3, as assessed by the absence of split product, and the small degree of spontaneous C3 conversion (loss of 20% C3N antigen and the presence of two peaks with C3c antigen) which occurred when serum was incubated in polypropylene tubes, was inhibited by the contrast media. The effects of sodium meglumine ioxitalamate and zymosan in vitro on complement activation were compared.
mesh_terms: D001798:Blood Proteins / Q000032:analysis; D003167:Complement Activation / Q000187:drug effects*; D003378:Counterimmunoelectrophoresis; D006801:Humans; D066298:In Vitro Techniques; D007482:Iothalamate Meglumine / Q000494:pharmacology*; D009391:Nephelometry and Turbidimetry; D015054:Zymosan / Q000494:pharmacology
chemical_list: D001798:Blood Proteins; C001694:meglumine ioxithalamate; D015054:Zymosan; D007482:Iothalamate Meglumine