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Effects of gestational hypertension and pre-eclampsia in mRNA expression of fibrinolysis genes in primary cultured human umbilical vein endothelial cells.
Thrombosis Research 2018 May 18
Hypertension disorders (HD) and pre-eclampsia (PRE) are leading causes of maternal deaths worldwide. PRE is associated with vascular endothelial dysfunction and with deregulation of the fibrinolysis pathway genes. Fibrinolysis is the fibrin clot hydrolysis process catalyzed by plasmin, a proteolytic enzyme formed from plasminogen. Plasminogen is cleaved by tissue-type (tPA) and urokinase-type (uPA) activators and inhibited by the plasminogen activator inhibitors type-1 (PAI-1) and type-2 (PAI-2). The whole process maintains blood hemostasis. This study aims to assess PAI-1, PAI-2, tPA and uPA mRNA expression in primary cultured human umbilical vein endothelial cells (HUVEC) isolated and cultured from healthy, HD and PRE women. Results show that PAI-1 and PAI-2 mRNA decreased in HD-HUVEC, whereas PAI-1 and uPA decreased in PRE-HUVEC cultures compared to control ones. Notably, the expression ratio between pro- and anti-fibrinolytic actors remained unchanged among the studied groups. It seems that newborn's hemostasis is maintained balanced probably by a compensatory mechanism that involves changes in the fibrinolysis gene expression profile. The real impact of these changes in mRNA expression is unknown, however, it is suggested that these changes could be associated with an increased predisposition to vascular disease development in the progeny.
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