Maternal Antenatal Depression and Deviations From Normative Brain Development in Offspring

Area of Science:

• Neuroscience
• Developmental Psychology
• Psychiatry

Background:

• Maternal mental health during pregnancy is crucial for fetal brain development.
• Prenatal exposure to maternal depression may impact offspring brain aging.
• The long-term, region-specific effects of maternal antenatal depression (MAD) on offspring brain development are not fully understood.

Purpose of the Study:

• To investigate whether MAD predicts region-specific deviations in cortical thickness, surface area, and subcortical volume in offspring.
• To determine if these region-specific deviations remain stable into the third decade of life.

Main Methods:

• Utilized neuroimaging data from a prenatal birth cohort with two follow-ups in young adulthood.
• Employed the CentileBrain model, analyzing 37,407 MRI scans from individuals aged 3 to 90 years.
• Assessed associations between MAD and deviations from normative brain development in offspring during their early and late 20s.

Main Results:

• MAD predicted deviations in thalamus and nucleus accumbens development, but not other subcortical volumes, surface area, or cortical thickness.
• Offspring exposed to greater MAD had smaller thalamus and nucleus accumbens in their early and late 20s.
• Sex differences emerged: men exposed to greater MAD showed a larger nucleus accumbens in their late 20s, but no thalamus deviations.

Conclusions:

• Altered development of the thalamus and nucleus accumbens, linked to MAD, may increase the risk of major depressive disorder.
• The thalamus is implicated in depression pathogenesis, while the nucleus accumbens is vital for reward and motivation.
• These findings highlight the lasting impact of prenatal maternal depression on specific brain structures and potential mental health outcomes.