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This presentation reviews recent discoveries about signaling mechanisms in hair follicles and their potential influence on hair cycle control and melanogenesis, without presenting new experimental results.

This review discusses the complex hormonal control of keratin expression in skin and its potential implications for treating skin and hair disorders, but reports no new clinical results.

This systematic review found that interventions targeting neuropeptides and neurotransmitters, particularly melatonin, substance P, and oxytocin, show consistent evidence for anti-inflammatory, reparative, and psychodermatologic benefits, highlighting the potential of neurohormonal signaling as a therapeutic target in dermatology.

Stress may affect hair growth by influencing hair follicle development and could contribute to hair loss.

This study found that acute sleep deprivation enhanced 5α-reductase expression and activity in the rat prefrontal cortex, and finasteride treatment reduced associated psychosis- and mania-like behaviors.