Maternal adversity, glucocorticoids and programming of neuroendocrine function and behaviour

Area of Science:

• Neuroendocrinology
• Developmental neuroscience
• Reproductive medicine

Background:

• Fetal exposure to glucocorticoids can occur endogenously or via synthetic treatments for preterm labor.
• Limited understanding exists regarding the mechanisms and critical windows of synthetic glucocorticoid's impact on human neurodevelopment.
• Glucocorticoids are vital for brain development, but excess exposure can lead to lifelong neuroendocrine and behavioral changes.

Purpose of the Study:

• To investigate the mechanisms by which synthetic glucocorticoids influence fetal neurodevelopment.
• To determine if specific sensitive time windows exist for prenatal glucocorticoid exposure.
• To understand the long-term effects of prenatal glucocorticoid manipulation on offspring health.

Main Methods:

• The study reviews existing literature on fetal glucocorticoid exposure and its effects.
• Analysis of mechanisms involving neurotransmitter systems and transcriptional changes in the fetal brain.
• Examination of long-term impacts on hypothalamo-pituitary-adrenal (HPA) axis function, behavior, and morphology.

Main Results:

• Prenatal glucocorticoid exposure permanently alters hypothalamo-pituitary-adrenal (HPA) axis function in offspring in a sex-dependent manner.
• Exposure leads to modifications in behavior, brain and organ morphology, and other endocrine systems.
• Altered endocrine function may impact health, potentially linking to premature aging-related pathologies.

Conclusions:

• Prenatal glucocorticoid exposure, both endogenous and synthetic, has profound and lasting effects on neuroendocrine function and behavior.
• These effects are sex-dependent and can manifest throughout the lifespan, influencing health and aging.
• Further research is needed to fully elucidate the mechanisms and identify critical windows of sensitivity.