Semax and the Melanocortin-4 Receptor: How a Heptapeptide Modulates BDNF Expression, Dopaminergic Tone, and Executive Function
Semax is a synthetic ACTH(4-7) analog that crosses the blood-brain barrier intranasally, engaging melanocortin receptors to upregulate BDNF and modulate dopaminergic tone in the prefrontal cortex.