[Significance of Tissue Factor-Bearing Microparticle Procoagulation Activity and Antithrombin Ⅲ Detection in...

To explore whether the high risk factors possibly leading to hypercoagulative status and thrombosis exist in Thalassemia patients of Guangxi region through detecting plasma tissne factor-bearing microparticles (TF⁺MP), procoagulatima activity, coagulation and anticoagulation function, fibrinolytic function, endothelial function and platelet count.

The TF⁺MP procoagulation activity was detected by chromogenic saubstract method, the levels of tissue factors (TF), tissue factor pathway inhibitor(TFPI), protein C (PC), protein S (PS), antithrombin Ⅲ(AT-Ⅲ), tissue plasminogen activator (tPA), thrombin-activated fibrinolysis inhibitor (TAFI), soluble E-selectin (sE-sel), intercellular adhesion molecule-1 (ICAM-1) and thrombomodulin (TM) were detected by ELISA in thalassemia group (n=71) and control group (n=20 heathy persons).

Compared with control group, the AT-Ⅲ level decreased in β-thalastemia major group (TM) (P<0.05), the AT-Ⅲ level in TM group independeutly posstiody correlated with plt count (r=0.37, P<0.05); the levels of TF and sICAM in α-thalassenia intermediate group (TA) significantly decteased (P<0.05), the procoagulatim activity of TF⁺MP in β-thalassemia intermediate group (TI) increased sngnificantly (P<0.05)， moreover positively corretated with AT-Ⅲ level (r=0.77, P<0.05). The TF and sICAM-1 levels in normal liver functim group of Thalassemia patients were lower tham those in control group (P<0.01 and P<0.05, respectively), the TF⁺MP activity between normal and abnormal liver function was significantly different (P<0.05), while there were no significant difference in other correspoding indexes beween thalassemia group and control group as well as between each thalassemia groups.

The damage of liver function and reduction of anticoagylation substances exist in patients with β-thalassenia major in Guangxi region, the procoagulation activity of plasma TF⁺MP in patients with β-thalassemia intermedia abnormally increases. All the above-mentioned factors may increase the risk of high coagulation status or thrombosis is thalassemia patients, the decrease of TF and SICAM-1 levels in patients with α-thalassemia intermedia may be factor against thrombosis.