Complement‐Dependence of Platelet Serotonin Release Test in Polytransfused Patients

Abstract
The research of platelet isoantibodies in patients with Cooley's anaemia was performed by simultaneous determination of the platelet‐complement fixation test, platelet factor 3 availability assay and 14C‐serotonin release test. In 93 % of the examined patients we obtained positive results with the 5HT‐release test, which appeared to be a complement‐dependent reaction in most of the sera‐containing isoantibodies, different from sera of patients affected by autoimmune thrombocytopenia.