Objective: To investigate the hematological changes and related gene mutation of post-severe acute respiratory syndrome (SARS) patients with osteonecrosis so as to find the sensitive molecular symbols for early screening of the high risk populations.
Methods: Fast peripheral venous blood samples were collected from 61 post-SARS patients with osteonecrosis, 25 males and 36 females, aged 30.4 (20 - 60), and 52 sex and age-matched healthy persons as controls. ELISA was used to detect the coagulation and fibrinolysis indicators: activated partial thromboplastin time (APTT), protein C (PC), antithrombin III (AT-III), plasminogen activator inhibitor (PAI), activated protein C resistance (APC-R), plasminogen (PLG), von Willebrand factor (VWF), D-dimer (D-D), and fibrinogen (Fib). Real-time PCR was used to detect the mutation of factor V G1601A (FV Leiden) and prothrombin G20210A.
Results: The levels of PC, AT-III, and PLG of the osteonecrosis group were 85% +/- 34%, 84 +/- 29%, and 69 +/- 23%, significantly lower than that of the control group (109% +/- 20%, 104% +/- 14%, and 94% +/- 15% respectively, all P < 0.01). PAI of the osteonecrosis group was 16 U/ml +/- 14 U/ml, significantly higher than that of the control group (8.0 U/ml +/- 4.3 U/ml, P < 0.01). The percentage of patients with abnormal indicators was 99.5% (54/61) in the osteonecrosis group, significantly higher than that of the control group (36.5%, 19/52, P < 0.01). The percentage of patients with 3 or more abnormal indicators was 72.1% (44/61) in the osteonecrosis group, significantly higher than that of the control group (17.3%, 9/52, P < 0.01). No mutations of F V Leiden and prothrombin G20210A was found in both groups.
Conclusion: Trends of hypercoagulation and hypofibrinolysis exist in the post-SARS patients with osteonecrosis. APTT, PC, AT-III, and PLG can be used as sensitive indicator for screening high risk populations of osteonecrosis.
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