Stereotypical alterations in cortical patterning are associated with maternal illness-induced placental dysfunction

Area of Science:

• Neuroscience
• Developmental Biology
• Immunology

Background:

• Cytokine-mediated placental damage can impair fetal nutrient and oxygen supply.
• Placental vulnerability to maternal inflammation changes throughout gestation.

Purpose of the Study:

• To investigate the impact of maternal illness during a specific gestational window on fetal neurodevelopment.
• To determine if placental vulnerability timing influences neuroanatomical development and behavior.

Main Methods:

• Mice models were used to study maternal illness effects during critical gestation periods.
• Analysis of neuronal subtype abundance and laminar positioning in the fetal brain cortex.
• Assessment of adult social behavior and cognitive function.

Main Results:

• Maternal illness during a specific gestational window altered neuronal subtype abundance and laminar positioning.
• Disturbances in the Tbr1, Satb2, and Ctip2/Fezf2 patterning axis were observed.
• Laminar imbalance in neuron types led to altered social behavior and cognition in adults.

Conclusions:

• The timing of placental vulnerability to maternal illness critically impacts fetal neurodevelopment.
• Developmental alterations in neuroanatomical systems and behaviors are linked to autism spectrum disorders.
• Illness-induced placental compromise during specific gestation periods has long-term neurodevelopmental consequences.