Markers of systemic endotheliosis in early-onset preeclampsia relapse

Aim: to assess the blood level of biological endothelial damage markers in women with previous early-onset preeclampsia (еPE) during both the preconception (PC) stage and the first trimester of pregnancy.Materials and Methods. A prospective single-center cohort study was conducted. The control group comprised 40 women with uncomplicated pregnancies. The observation group consisted of 97 patients with a history of ePE, stratified based on pregnancy outcome into the comparison group (n = 59) characterized by a favorable gestational course, and the main group (n = 38) with relapsed еPE (30 patients were excluded from the study). Markers of systemic endotheliosis were determined in women at the PC stage and at 11–13 weeks of gestation: endothelin-1 (ET-1) and endothelial extracellular vesicles (EVs; CD-144).Results. At the PC stage, women in the control group and patients from the comparison group had comparable median (Me) ET-1 levels – 0.39 and 0.40 pmol/ml (p = 0.5935), respectively; at the same time, patients with relapsed еPE vs. control group had it significantly elevated (Me = 0.55 pmol/ml; p = 0.0382). At gestational age of 11–13 weeks, ET-1 level was significantly higher in the group with relapsed еPE (Me = 0.93 pmol/ml) than in control group (Me = 0.29 pmol/ml; p < 0.0001) and comparison group (Me = 0.42 pmol/ml; p = 0.0003). No significant changes in E-EVs (CD-144) level at various PС stages were observed, whereas in the study groups such parameters remained differed.Conclusion. Biological markers evidencing about systemic endothelial dysfunction/destruction – ET-1 and E-EVs (CD-144) in patients with previous ePE can be considered as predictive tests of disease relapse with an accuracy of 63.5 % and 83.0 % at the PС stage and 85.7 % and 94.2 % at gestational age of 11–13 weeks, respectively.