RU-58841

Etki Mekanizması

RU-58841 functions as a competitive antagonist of the androgen receptor (AR). When applied topically to the scalp, it penetrates the skin and binds directly to androgen receptors in dermal papilla cells of hair follicles, preventing dihydrotestosterone (DHT) and testosterone from activating those receptors. This is fundamentally different from 5-alpha reductase inhibitors like finasteride, which reduce DHT production systemically. RU-58841 does not lower DHT or testosterone levels at all; it simply blocks their action at the receptor level in the tissue where it is applied. The compound has a very high binding affinity for the androgen receptor but an extremely short systemic half-life of roughly one hour due to rapid hydrolysis of its amide bond in the bloodstream. This pharmacokinetic profile is intentional: it confines the anti-androgenic activity to the scalp while minimizing the risk of systemic side effects such as sexual dysfunction or hormonal disruption. Animal studies in hamster flank organ and stumptail macaque models demonstrated significant local anti-androgenic effects, including hair regrowth and inhibition of androgen-dependent sebaceous gland activity, without measurable systemic anti-androgenic effects at therapeutic topical doses.