This describes the crucial process by which androgen hormones, primarily testosterone and dihydrotestosterone (DHT), bind to their specific receptors within various regions of the central nervous system to exert biological effects. This signaling pathway profoundly influences neurogenesis, mood regulation, cognitive function, and the maintenance of neuronal structure. The brain contains a significant concentration of these receptors, underscoring their importance beyond traditional reproductive roles.
Origin
The understanding of this signaling system is rooted in neuroendocrinology, a discipline that studies the interaction between the nervous system and the endocrine system. Initial research focused on the hypothalamus and pituitary, but subsequent studies confirmed the widespread distribution and functional significance of androgen receptors throughout the cerebral cortex and hippocampus.
Mechanism
Androgens enter the brain and bind to the intracellular androgen receptor (AR), forming a hormone-receptor complex that translocates to the nucleus to regulate gene transcription, a classic genomic effect. Non-genomic mechanisms also exist, where androgens rapidly modulate neuronal excitability and signaling pathways at the cell membrane. This signaling is essential for maintaining synaptic plasticity and protecting neurons from excitotoxicity and age-related degeneration.
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