PP016. Circulating lymphangiogenic factors in preeclampsia

Area of Science:

• Obstetrics and Gynecology
• Vascular Biology
• Pathophysiology

Background:

• Preeclampsia is a pregnancy disorder marked by an anti-angiogenic state.
• The role of lymphangiogenesis in preeclampsia has not been explored.
• Impaired VEGF-C signaling is linked to edema and hypertension.

Purpose of the Study:

• To investigate alterations in circulating VEGF-C and its receptors (sVEGFR2, sVEGFR3) in preeclampsia.
• To correlate these changes with preeclampsia severity.

Main Methods:

• Plasma levels of VEGF-C, sVEGFR1, sVEGFR2, and sVEGFR3 were measured.
• Analysis included women with gestational hypertension (GHTN), preeclampsia (PE), and normotensive pregnancies (NP).

Main Results:

• sVEGFR1 was significantly higher in PE compared to GHTN and NP.
• VEGF-C levels were lower in GHTN than PE, but not significantly different from NP.
• sVEGFR-3 was significantly lower in PE than NP.
• The ratio of sVEGFR-2+sVEGFR-3/VEGF-C was significantly lower in PE compared to GHTN and NP.

Conclusions:

• Preeclampsia exhibits a pro-lymphangiogenic state characterized by decreased sVEGFR-3, slightly decreased VEGFR-2, increased VEGF-C, and a markedly lower sVEGFR2+sVEGFR3/VEGF-C ratio.
• This state may be a compensatory mechanism for edema and hypertension in preeclampsia.
• Further research is needed to determine the clinical relevance of these lymphangiogenic pathway alterations.