Oxidative stress and endothelial function in normal pregnancy versus pre-eclampsia, a combined longitudinal and case...

Area of Science:

• Obstetrics and Gynecology
• Cardiovascular Research
• Reproductive Medicine

Background:

• Pre-eclampsia (PE) is characterized by impaired endothelial function, leading to altered vascular reactivity and integrity.
• This dysfunction stems from placental factors, causing systemic oxidative stress (OS) and reduced nitric oxide (•NO) bioavailability.
• Nitric oxide (•NO) is crucial for maintaining endothelial function and ensuring adequate feto-maternal exchange.

Purpose of the Study:

• To evaluate in vivo endothelial function in normal and pre-eclamptic pregnancies.
• To quantify in vitro oxidative stress (OS) in normal and pre-eclamptic pregnancies.
• To investigate the role of nitric oxide (•NO) and oxidative stress in the pathophysiology of pre-eclampsia.

Main Methods:

• A prospective longitudinal study and a matched case-control study design.
• Evaluation of endothelial function using Peripheral Arterial Tonometry (PAT) and Flow-Mediated Dilatation (FMD).
• Quantification of superoxide (O2•) and nitric oxide (•NO) using electron paramagnetic resonance (EPR); assessment of eNOS placental expression.

Main Results:

• The Endopreg study will provide longitudinal data on endothelial function and oxidative stress during pregnancy.
• Measurements of •NO, O2•, and eNOS will offer insights into the mechanisms underlying PE.
• Vascular tests may help predict future cardiovascular risks in women with a history of PE.

Conclusions:

• The Endopreg study aims to elucidate the relationship between endothelial dysfunction, oxidative stress, and pre-eclampsia.
• Findings may lead to the adoption of vascular tests for predicting long-term cardiovascular risk in women post-PE.
• Understanding the pathophysiology of PE through •NO, O2•, and eNOS measurements is critical for improved management.