<![CDATA[Introductions: Preeclampsia is a specific syndrome in pregnancy as a result of abnormal placental invasion leading to placental hypoperfusion. Persistent hypoxia of the placenta causes the release of various inflammatory mediators into the circulation and results in local endothelial dysfunction. Increased endothelin-1 (ET-1) secretion and increased inflammatory mediators occur in preeclampsia.Aims: To analyze the relationship between endothelin-1 and early onset preeclampsia.Methods: This crosssectional study included 50 pregnant women with early onset preeclampsia (n=25) and normal pregnancies (n=25). Pregnant women aged 20-35 years with single intrauterine fetus, primigravida and multigravida who experienced early onset preeclampsia 34 weeks of gestation were included in this study. Endothelin-1 levels was measured using the Enzyme Linked Immunosorbant Assay (ELISA) method. The analysis was performed using the Mann-Whitney test. Receiving Operator Characteristic (ROC) curve analysis was used to find the cut-off value and diagnostic accuracy of endothelin-1 levels.Results: The mean of ET-1 level was significantly higher in early onset preeclampsia (0.732 ± 0.56 pg/mL) compared to normal pregnancy (0.318 ± 0.09 pg/mL) with value of p = 0.000. The ROC analysis showed the AUC value of 87.8% (p = 0.000, 95% CI 78.6%-97.1%). The cut-off value for ET-1 was 0.385 pg/mL, with 80% sensitivity and 68% specificity (PR=3.14; 95% CI 1.40-7.03).Conclusion: Increased levels of endothelin-1 (ET-1) significantly associated with early onset preeclampsia. ET-1 level ≥ 0.385 pg/mL in pregnant women with 34 weeks of gestation is potential biomarkers to predict the occurrence of early onset preeclampsia with a risk up to 3.14 times.]]>
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