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Trophoblast Cell Recovery from Angiogenesis-Tube Formation Assay for Differentiation Marker Expression Analysis
Published on: November 8, 2024
Unexplained fetal death: another anti-angiogenic state
Jimmy Espinoza1, Tinnakorn Chaiworapongsa, Roberto Romero
1Perinatology Research Branch, NICHD/NIH/DHHS, Bethesda, Maryland, USA.
Summary
Plasma soluble vascular endothelial growth factor receptor-1 (sVEGFR-1) is elevated in fetal death cases, but not in other common pregnancy complications like preterm labor or pyelonephritis.
Area of Science:
- Obstetrics and Gynecology
- Reproductive Biology
- Vascular Biology
Background:
- Pregnancy requires extensive vasculogenesis and angiogenesis for fetal and placental development.
- Soluble vascular endothelial growth factor receptor-1 (sVEGFR-1), an antagonist to key angiogenic factors, is implicated in preeclampsia and small for gestational age (SGA).
- Limited data exists on plasma sVEGFR-1 concentrations in various obstetrical disorders.
Purpose of the Study:
- To determine plasma sVEGFR-1 concentrations in normal pregnancy and in women with specific pregnancy complications.
- Investigate sVEGFR-1 levels in conditions including spontaneous preterm labor, preterm premature rupture of the membranes (PROM), fetal death, and acute pyelonephritis.
- Compare sVEGFR-1 levels across different gestational states and obstetrical conditions.
Main Methods:
- A cross-sectional study involving 499 women across seven groups: non-pregnant, pregnant, normal term in labor, fetal death, spontaneous preterm labor, preterm PROM, and acute pyelonephritis.
- Plasma sVEGFR-1 concentrations were measured using enzyme-linked immunoassay.
- Delta values (actual minus expected sVEGFR-1 concentration based on normal pregnancy regression) were calculated to account for gestational age and compare groups.
Main Results:
- Normal pregnant women exhibited significantly higher plasma sVEGFR-1 than non-pregnant women, increasing with gestational age.
- No significant difference in delta sVEGFR-1 was found between normal term pregnant women with or without labor.
- Patients with fetal death showed significantly higher delta sVEGFR-1 compared to normal pregnant women, particularly in cases of unexplained fetal death or preeclampsia.
Conclusions:
- Plasma sVEGFR-1 concentration is elevated in a subset of patients experiencing fetal death.
- sVEGFR-1 levels do not significantly change in term or preterm parturition, rupture of fetal membranes, or acute pyelonephritis.
- Elevated sVEGFR-1 may serve as a biomarker in specific pregnancy complications like fetal death.
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