[Platelet activation in relapse idiopathic nephrotic syndrome in children].
The role that platelets play in pathogenesis and thromboembolic complications of the idiopathic nephrotic syndrome (INS) in children still remains unclear. The aim of the study was to analyse of platelet activation in whole blood during first 8 weeks of ins. Study group comprised 24 children with 34 relapses of INS by ISKDC (group A). Obtained results were compared to 16 healthy children (group B). We assessed activation by the count of platelet aggregates, microparticles and surface expression of selected markers--CD62P (P-selectin), CD42b (part of von Willebrand factor receptor) at the onset INS, after 2 weeks of therapy. We found the increased counts of platelet aggregates and microparticles at the onset of INS with a systematic decrease in following 2 weeks. Furthermore, expression of CD42b was significantly lower at the beginning of therapy. There were no clear correlation between markers of activation and biochemical parameters in the study group. According to these findings we conclude that increased activation of blood platelets is an independent risk factor of thromboembolic complication in the early stages of relapse of INS. The role of platelets in pathogenesis or induction of ins relapse remains the matter for further investigation.