The Role of Somatostatin Expression in Hair Follicle Immune Privilege

Hair follicle stem cells remain in bald individuals, but progenitor cells do not, raising questions about hair regrowth claims by Pelage. PP405 is discussed as a potential treatment, with skepticism about its effectiveness compared to existing treatments like Minoxidil and Finasteride.

Follistatin, known for inhibiting myostatin and promoting muscle growth in mice, is being discussed as a potential treatment for hair loss. Specific treatments mentioned include Minoxidil, Finasteride, and RU58841.

Hair transplant recipients are concerned about whether dormant follicles are permanently damaged by incisions, but some believe undamaged follicles could still regrow if a treatment like PP405 is effective. Opinions vary on the impact of transplants on original follicles, with some suggesting treatments like finasteride can help regrow hair.

Balding scalps have more androgen receptors, leading to increased TGF-beta, which causes blood vessel loss and hair follicle miniaturization. Blocking androgen signaling and TGF-beta may help prevent hair loss.

PP405 is a potential hair loss treatment that inhibits mitochondrial pyruvate carriers, increasing lactate dehydrogenase activity and stimulating hair follicle stem cells. In a phase 1 trial, 31% of participants showed over 20% hair density increase with PP405 treatment.

Adipose-derived stem cell secretome showed significant improvement in hair density and growth, especially when combined with minoxidil, suggesting a synergistic effect. The study had limitations, including a small sample size and potential bias.