Abstract
INTRODUCTION:The etiology of preeclampsia is not fully established. A few studies have shown a relationship between natural coagulation inhibitors and preeclampsia.OBJECTIVES:The purpose of this study was to investigate the status of natural coagulation inhibitors and active protein C resistance (APC‐R) in preeclampsia.PATIENTS AND METHODS:We studied 70 women with preeclampsia recruited consecutively and 70 healthy pregnant and 70 nonpregnant women as controls. Plasma protein C (PC), free protein S (fPS), antithrombin III (ATIII) and APC‐R were evaluated.RESULTS:ATIII values were found to be significantly lower in preeclamptic patients than in the control groups (p< 0.001). Nevertheless, there was no significant difference between the healthy pregnant and nonpregnant women groups (p = 0.141). The fPS values of the preeclamptic and healthy pregnant groups were lower than that of the nonpregnant group (p< 0.001), and the fPS value of the preeclamptic pregnant women was lower than that of healthy pregnant women (p<0.001). The PC value of the preeclamptic pregnant women was lower than that of the control groups (p< 0.001). The PC value of the healthy pregnant women was lower than that of the nonpregnant women (p< 0.001). The mean APC activity values were lower in the preeclamptic patients than that of the control groups (p< 0.001, p< 0.001). The APC‐R positivity rates of the preeclamptic groups were higher than that of the control groups (p<0.001).CONCLUSIONS:This study demonstrated that ATIII, fPS, PC values and APC resistance were lower and APC‐R positivity was higher in preeclamptic women than in normal pregnant and nonpregnant women.
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