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Placental vascular morphogenesis.

D S Charnock-Jones1, G J Burton

  • 1Department of Obstetrics and Gynaecology, University of Cambridge, The Rosie Hospital, Cambridge, CB2 2SW, UK.

Bailliere'S Best Practice & Research. Clinical Obstetrics & Gynaecology
|January 6, 2001
PubMed
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Placental development, crucial for fetal health, involves villous growth regulated by oxygen levels. Fetal oxygen demand influences growth factors, guiding placental vascular remodeling for efficient nutrient and oxygen transfer.

Area of Science:

  • Obstetrics and Gynecology
  • Developmental Biology
  • Physiology

Background:

  • Placental growth and development are critical for fetal well-being and long-term adult health.
  • The placenta's transfer capacity increases with gestation, supporting growing fetal demands.
  • Terminal villi, the primary sites for oxygen exchange, develop in the third trimester.

Purpose of the Study:

  • To investigate the mechanisms regulating placental villous growth and differentiation.
  • To understand how fetal demand influences placental vascular development.
  • To explore the role of oxygen and growth factors in placental angiogenesis.

Main Methods:

  • Analysis of placental villous structure and capillary development during gestation.
  • Measurement of oxygen levels (PO2) in the intervillous space.

Related Experiment Videos

  • Investigation of soluble factors, including vascular endothelial growth factor (VEGF) and angiopoietin 2, and their regulation by oxygen.

    • Main Results:

    • Villous growth is thought to be driven by capillary angiogenesis, characterized by increased fetal capillary volume and thinned placental layers.
    • Intervillous space PO2 is low in the first trimester, rising sharply in the second.
    • Several endothelial growth factors (e.g., VEGF) and antagonists are regulated by oxygen levels.

    Conclusions:

    • Fetal demand may regulate placental villous growth and differentiation by altering local PO2.
    • Altered PO2 modulates growth factors and their antagonists, influencing endothelial growth and vessel remodeling.
    • This oxygen-mediated regulation is crucial for adapting placental function to fetal needs throughout pregnancy.