In preeclamptic cases, UCB presented significantly higher tPA values and significantly lower PAI-1/tPA ratio. Preeclamptic women also presented significantly higher tPA, as well as PAI-1 values, when compared with normal pregnant women; no significant difference was found for D-dimer. In preeclamptic women, proteinuria (a marker of PE severity) correlated positively and significantly with tPA and PAI-1 antigen levels. An inverse relationship between maternal tPA antigen levels and fetal birth weigh in PE was also observed. Our data show that the hemostatic maternal disturbances observed in preeclamptic women have similarities with the UCB circulation, and that endothelial dysfunction is the most plausible underlying cause. Moreover, maternal hemostatic disturbances seem to be associated with the severity of PE. Further studies are needed to strength the values of tPA and PAI-1 as markers of severity in PE.
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