The placenta and gestational diabetes mellitus

Area of Science:

• Obstetrics and Gynecology
• Perinatology
• Developmental Biology

Background:

• The human placenta facilitates materno-fetal exchange but is vulnerable to intrauterine conditions.
• Gestational diabetes mellitus (GDM) presents adverse intrauterine conditions impacting placental and fetal development.
• Placental alterations in GDM include micro-anatomical and molecular changes, affecting vascularization, vasoactive molecules, and oxidative stress.

Purpose of the Study:

• To investigate the impact of GDM on placental anatomy, physiology, and materno-fetal transport.
• To elucidate the molecular and micro-anatomical alterations in placentas from GDM pregnancies.
• To understand how GDM affects nutrient and gas exchange, and fetal development.

Main Methods:

• Comparative analysis of placental tissues from GDM and normal pregnancies.
• Micro-anatomical and molecular assessments of placental structure and function.
• Evaluation of materno-fetal transport mechanisms, including nutrient and gas exchange.

Main Results:

• GDM is associated with aberrant villous vascularization and a disbalance of vasoactive molecules.
• Enhanced oxidative stress is observed in placentas from GDM pregnancies.
• While glucose transport is largely unaffected, GDM significantly alters amino acid transport and lipid metabolism gene expression.

Conclusions:

• GDM induces significant micro-anatomical and molecular changes in the human placenta.
• These placental alterations in GDM can lead to impaired fetal oxygenation and altered nutrient supply.
• GDM affects transplacental transport of amino acids and lipid metabolism, with potential consequences for fetal development.