The mechanistic insights into the application of retinoids and possible adjunct therapeutic treatment to androgenic alopecia

Androgenetic alopecia (AGA) is a common, nonscarring hair loss condition affecting both men and women, often leading to psychological distress and reduced self-esteem. It involves the gradual miniaturization of hair follicles and a shortened anagen phase, primarily influenced by genetic predisposition and androgenic activity, especially dihydrotestosterone. The paradoxical role of androgens - promoting hair growth in some areas while suppressing it on the scalp - has been key in understanding AGA's pathogenesis. Altered androgen receptor signaling in dermal papilla cells contributes significantly to follicular regression. Current treatments offer limited success, often failing to reverse the progression of hair loss. However, recent research has turned attention toward retinoids - vitamin A derivatives known for their role in cell proliferation and differentiation. These compounds act via nuclear receptors to modulate gene expression and may promote hair growth by extending the anagen phase and stimulating follicular activity. Early studies suggest that topical retinoids, especially in combination with existing therapies, can improve treatment outcomes. This evolving insight into retinoid biology and its interaction with hair follicle pathways offers a promising direction for more effective, mechanism-based treatments of AGA, potentially advancing long-term management and hair restoration options.