Developmental effects of androgens in the human brain

Area of Science:

• Neuroendocrinology
• Developmental Neuroscience
• Cognitive Neuroscience

Background:

• Androgens are crucial for sex-specific brain development.
• Limited understanding of testosterone and dehydroepiandrosterone (DHEA) effects on adolescent cortico-limbic development and cognition.

Purpose of the Study:

• Examine developmental effects of testosterone and DHEA on cortico-limbic maturation and cognition in typically developing youth.
• Investigate sex-specific effects and interactions between testosterone and DHEA.

Main Methods:

• Longitudinal study of 433 typically developing children and adolescents (4-24 years).
• Analysis of brain structure (cortical thickness, structural covariance) and cognitive function.
• Correlated hormone levels with brain phenotypes and behavioral outcomes.

Main Results:

• Higher testosterone associated with decreased prefrontal cortical thickness in boys and altered structural covariance, predicting higher aggression and lower executive function.
• DHEA associated with increased cortical thickness in cognitive control regions and improved visual attention and working memory.
• DHEA mitigated some negative effects of testosterone on brain structure.

Conclusions:

• Testosterone may negatively impact adolescent cortical functions, while DHEA may optimize them.
• Differential androgen effects highlight distinct roles in brain maturation and cognitive development.
• Findings suggest DHEA may buffer against testosterone's adverse effects on brain development.