Sex differences in prenatal epigenetic programming of stress pathways

Area of Science:

• Neuroscience
• Developmental Biology
• Psychiatry

Background:

• Maternal stress is linked to neurodevelopmental disorders (NDDs) such as schizophrenia and autism.
• The maternal environment can influence embryonic development and epigenome programming.
• Prenatal stress animal models show sex- and time-specific effects on offspring stress responses.

Purpose of the Study:

• To review the association between prenatal stress and offspring stress pathway dysregulation.
• To explore mechanisms of maternal-embryo transmission and epigenome programming.
• To highlight the significance of sex differences in NDDs and identify potential biomarkers.

Main Methods:

• Review of existing literature on prenatal stress and neurodevelopment.
• Focus on molecular and epigenetic analyses at the maternal-embryo interface, particularly the placenta.
• Examination of sex differences in phenotypic outcomes and gene targets.

Main Results:

• Prenatal stress can program offspring stress pathways, contributing to NDDs.
• The placenta is a key site for epigenetic modifications with potential transgenerational effects.
• Sex-specific effects are evident in offspring stress responsivity and vulnerability windows.

Conclusions:

• Understanding maternal stress effects on the epigenome is crucial for identifying NDD biomarkers.
• Investigating sex differences can pinpoint specific genetic targets and developmental vulnerabilities.
• Placental epigenetic analysis offers insights into the inheritance of stress-related programming.