The pathogenesis of accelerated fibrinolysis in hepatosplenic schistosomiasis

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Abstract
Seventy patients with different stages of hepatosplenic schistosomiasis and 18 non-bilharzial normal controls were studied. Plasminogen, plasminogen activators (PA), tissue-type plasminogen activator (t-PA), urokinase-type plasminogen activator (u-PA), alpha 2-antiplasmin (alpha 2-AP), plasminogen activator inhibitor (PAI), fibrinogen/fibrin degradation products (FDP) and D-dimer were determined to elucidate the role of plasminogen activators and inhibitors in the pathogenesis of accelerated fibrinolysis in schistosomiasis. There was a progressive increase in the levels of PA, t-PA, u-PA, FDP and D-dimer indicating enhanced fibrinolytic activity with advancing disease. In addition, there was progressive decrease of plasminogen, alpha 2-AP and PAI levels which might be due to decreased hepatic synthesis and/or increased peripheral consumption. These findings suggest that the pathogenesis of accelerated fibrinolysis in schistosomiasis is multifactorial, but may be due to the progressive increase in the levels of plasminogen activators. In addition, the increase of FDP and D-dimer levels are evidence of secondary fibrinolysis following thrombin generation.

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