Preeclampsia: Syndrome or Disease?

Area of Science:

• Obstetrics and Gynecology
• Cardiovascular Disease Research
• Reproductive Medicine

Background:

• Preeclampsia, characterized by hypertension and proteinuria, presents a complex syndrome with poorly understood underlying mechanisms.
• Current understanding of preeclampsia pathophysiology is limited, hindering the development of targeted therapies and reliable predictors.
• The increased risk of cardiovascular disease later in life for women with preeclampsia suggests it may expose pre-existing subclinical vascular conditions.

Purpose of the Study:

• To investigate the heterogeneity of preeclampsia and its impact on understanding disease mechanisms.
• To propose that preeclampsia represents a syndrome with diverse underlying pathophysiologies, rather than a single disease entity.
• To highlight the need for identifying distinct preeclampsia phenotypes to improve diagnostic and therapeutic strategies.

Main Methods:

• Review of existing literature on preeclampsia pathophysiology, focusing on early-onset versus late-onset phenotypes.
• Analysis of the limitations of current diagnostic criteria in reflecting underlying disease mechanisms.
• Proposal for a new approach involving large-scale prospective data collection and unbiased biospecimen analysis.

Main Results:

• The "preeclampsia syndrome" encompasses varied pathophysiologies, with defective placentation more relevant to early-onset forms.
• Late-onset preeclampsia appears more linked to maternal constitutional factors and susceptibility to vascular damage.
• The heterogeneity of preeclampsia phenotypes may explain the limited success of current biomarker studies.

Conclusions:

• Recognizing distinct preeclampsia phenotypes is essential for advancing research and clinical practice.
• Future research should focus on harmonized data collection and unbiased analysis to identify these phenotypes.
• This approach is critical for developing effective therapies and predictors for preeclampsia.