Placental development in normal and compromised pregnancies-- a review

Area of Science:

• Reproductive biology
• Developmental biology
• Perinatology

Background:

• Intrauterine growth restriction (IUGR) is a major cause of infant mortality and morbidity.
• IUGR is linked to long-term adult health issues, including cardiovascular disease and diabetes.
• Placental structure and function abnormalities are common causes of IUGR.

Purpose of the Study:

• To investigate the role of growth factors in placental insufficiency (PI) and IUGR.
• To understand the developmental chronology of PI-IUGR.
• To utilize an animal model for studying human IUGR pathologies.

Main Methods:

• Employed an ovine model to study placental insufficiency (PI) and intrauterine growth restriction (IUGR).
• Analyzed the expression of key growth factors and their receptors in the placenta.
• Correlated growth factor expression changes with placental vascular structure and function.

Main Results:

• Observed altered expression of vascular endothelial growth factor (VEGF), placental growth factor (PlGF), and their receptors.
• Documented changes in angiopoietin 2 and its receptor, Tie 2.
• Found associations between altered growth factor expression and both acute and chronic placental vascular changes.

Conclusions:

• Changes in specific growth factors are implicated in the development of placental insufficiency.
• The ovine model provides valuable insights into the developmental processes underlying PI-IUGR.
• Further research can elucidate the precise roles of these factors in fetal development and long-term health outcomes.