Gamma Delta T Cells as Novel Players in Alopecia Areata Pathobiology: Vdelta1 Positive T Lymphocytes May Recognize Stressed Hair Follicle Keratinocytes, Leading to IFN Gamma-Dependent Hair Follicle Dystrophy and Immune Privilege Collapse

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.

Corticosterone inhibits GAS6, affecting hair follicle stem-cell activity, with potential implications for stress-related hair loss. Ashwagandha and Vitamin K are suggested for reducing cortisol, but their effectiveness is debated.

GT20029 is a new hair loss treatment in Phase 3 trials in China, using PROTAC technology to target androgen receptors, potentially with fewer side effects than finasteride and minoxidil. VDPHL01, a second-generation minoxidil, is also mentioned as potentially more effective.

TDM-105795 showed promising hair growth results, with higher efficacy than placebo and minimal side effects. It activates dormant hair follicle stem cells and may maintain gains without immediate loss, unlike minoxidil.

Vitamin E and K deficiencies due to exocrine pancreatic insufficiency may affect hair growth. A scalp biopsy is recommended to check for autoimmune-related hair loss.

A 23-year-old male is experiencing diffuse hair loss and miniaturization, possibly due to high IGE levels after using tofacitinib. He seeks advice and has not yet consulted a dermatologist.