The balancing act - PPAR-γ's roles at the maternal-fetal interface

Area of Science:

• Reproductive biology
• Molecular endocrinology
• Pregnancy research

Background:

• Peroxisome proliferator-activated receptor-gamma (PPAR-γ) is a nuclear hormone receptor superfamily member.
• While known for lipid metabolism and extravillous trophoblast (EVT) differentiation, its roles in villous trophoblast (VT) differentiation, placental fatty-acid metabolism, inflammation, and oxidative stress are under-explored.
• PPAR-γ's involvement in placental pathologies suggests a critical, yet overlooked, function in pregnancy.

Purpose of the Study:

• To review the under-explored functions of PPAR-γ in placental immunological responses and oxidative stress management.
• To highlight PPAR-γ's role in pathologic pregnancies and discuss current models.
• To emphasize the need for understanding PPAR-γ's molecular regulation in placentation and pregnancy disorders.

Main Methods:

• Literature review focusing on PPAR-γ's role in placental biology.
• Analysis of existing models of PPAR-γ function in pregnancy.
• Synthesis of information on PPAR-γ's involvement in immune and oxidative pathways.

Main Results:

• PPAR-γ is crucial for balancing structural and functional aspects of the maternal-fetal interface.
• The receptor is implicated in pathways relevant to various placental pathologies.
• Available drugs targeting PPAR-γ present potential therapeutic avenues.

Conclusions:

• Elucidating PPAR-γ's molecular pathways will enhance understanding of placentation and pregnancy disorders.
• Further research is needed to address the critical knowledge gap in differential PPAR-γ regulation in trophoblast lineages.
• Understanding PPAR-γ modulation may improve placental and endothelial function in at-risk pregnancies.