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  • Title: Significance of complement activation in autoimmune haemolytic anaemia of "warm type".
    Author: Kretschmer V, Mueller-Eckhardt C.
    Journal: Blut; 1977 Dec; 35(6):447-55. PubMed ID: 597617.
    Abstract:
    To study possible relationships between serum C3 and C4 levels and fixation of complement components (C) on red cells, 79 patients of autoimmune haemolytic anaemia of warm type (AIHA) and 7 patients of various diseases with positive direct antiglobulintest (DAT) but without haemolysis were investigated. 23 out of 79 patients with AIHA were analyzed repeatedly during the course of the disease. There were no significant differences of C levels between the various clinical types. However, the number of patients with reduced levels of C3 and C4 was significantly higher among cases with C fixation on the red cells than among those with fixation of immunoglobulins alone. Changes were more pronounced for C4 than C3 and mean values of serum C4 were significantly lower in the group with C fixation. If incomplete warm haemolysins were demonstrable, C4 levels were lower than in cases without warm haemolysins. During the clinical course, C3 and C4 concentrations showed a close correlation to the severity of haemolysis.
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