Abstract
In order to investigate whether alpha 2-antiplasmin (alpha 2-AP) levels may be related to thrombin activity, we measured alpha 2-AP and fibrinopeptide A (FPA) in 51 patients with clinical conditions frequently associated with increased thrombin activity. The diagnoses were: atherosclerotic disease, chronic inflammatory disease and hematological neoplastic disease. A significant negative correlation was found between alpha 2-AP and FPA (p less than 0.01). When patients were divided into three subgroups on the basis of their FPA levels, a significant reduction in alpha 2-AP was found in patients with the highest FPA concentration (greater than 9 ng/ml). Accordingly, a significant negative relationship between alpha 2-AP and FPA was found only in this subgroup (p less than 0.01). Our data suggest that the partial consumption of alpha 2-AP in patients with elevated FPA levels may reflect a subclinical fibrinolysis activation secondary to increased thrombin activity.
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