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Endothelin converting enzyme (ECE) activity in normal pregnancy and preeclampsia.

Gunilla Ajne1, Kerstin Wolff, Frej Fyhrquist

  • 1Department of Obstetrics and Gynaecology, Huddinge University Hospital, Karolinska Institute, Stockholm, Sweden. gunilla.ajne@hs.se

Hypertension in Pregnancy
|October 24, 2003
PubMed
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Correction.

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Preeclampsia is linked to increased endothelin-1 (ET-1) production, indicated by higher endothelin-converting-enzyme activity. This enhanced ET-1 activity persists postpartum, suggesting potential endothelial dysfunction in preeclampsia.

Area of Science:

  • Cardiovascular Physiology
  • Reproductive Medicine
  • Endocrinology

Background:

  • Endothelial dysfunction and increased endothelin-1 (ET-1) are implicated in preeclampsia.
  • ET-1 production is regulated by endothelin-converting-enzyme (ECE) activity.
  • Quantifying ECE activity and ET-1 levels can elucidate preeclampsia pathophysiology.

Purpose of the Study:

  • To compare ECE activity, big ET-1, and ET-1 concentrations in preeclampsia versus normal pregnancy.
  • To analyze these markers longitudinally throughout normal pregnancy.
  • To investigate the role of ET-1 production in preeclampsia.

Main Methods:

  • Blood samples were collected from 29 healthy pregnant women and 27 with preeclampsia at various gestational weeks and postpartum.

Related Experiment Videos

  • Endothelin-1 (ET-1) was measured using ELISA; big ET-1 by RIA.
  • Endothelin-converting-enzyme (ECE) activity was assessed using big ET-1 as a substrate.

    • Main Results:

    • In normal pregnancy, ET-1 increased significantly at 38 weeks gestation and postpartum.
    • Women with preeclampsia exhibited higher ET-1 levels at diagnosis compared to controls at 38 weeks.
    • Endothelin-converting-enzyme (ECE) activity was significantly elevated in preeclampsia patients, persisting postpartum.

    Conclusions:

    • Findings suggest enhanced ET-1 production in preeclampsia.
    • Elevated postpartum ECE activity may indicate inherent endothelial dysfunction or irreversible changes caused by preeclampsia.
    • These results highlight the potential role of the endothelin system in preeclampsia pathogenesis.