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January 2023 in “Przegląd Dermatologiczny” This review discusses current and emerging treatments for alopecia areata, emphasizing systemic treatments for moderate to severe cases, and reports no new clinical results.
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August 2022 in “Journal of Dermatology and Dermatologic Surgery” In this case report, tofacitinib was initiated in a 20-year-old female with alopecia universalis resistant to topical treatments, but resulted in a mild peripheral neuropathy side effect.
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February 2021 in “Farmacja Polska” This article reviews the role of the JAK-STAT pathway in inflammatory skin diseases and considers the therapeutic benefits of JAK inhibitors, presenting them as promising treatments but reports no new experimental results.
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October 2018 in “InTech eBooks” This chapter reviews current and emerging pharmacological treatments for alopecia, noting that the FDA's classification of alopecia as a cosmetic disease has limited drug development and led to off-label use of potentially dangerous compounds.
July 2026 in “Journal of Investigative Dermatology” Alopecia totalis/universalis involves more intense immune activity and inflammation than patchy alopecia areata.
March 2026 in “SKIN The Journal of Cutaneous Medicine” This study found that ritlecitinib was well tolerated in children aged 6 to under 12 years with severe alopecia areata, with ongoing trials examining its efficacy and safety over a 24-week period and in long-term use up to 36 months.
March 2026 in “The Journal of Dermatology” This study found that ritlecitinib 50 mg is cost-effective compared to no treatment for patients in Japan with alopecia areata and significant scalp hair loss, demonstrating an incremental cost-effectiveness ratio below the country's cost-effectiveness threshold.
February 2026 in “The Journal of Dermatology” This study reports that ritlecitinib 50 mg, with or without an initial loading dose, demonstrated meaningful and sustained efficacy up to 24 months in the Asian subpopulation with severe alopecia areata, showing significant scalp, eyebrow, and eyelash hair regrowth, along with an acceptable safety profile.
December 2025 in “International Journal of Innovative Technologies in Social Science” This study found that ritlecitinib, approved for alopecia areata in patients aged 12 and older, has an acceptable safety profile with mild to moderate side effects and no increase in serious adverse events compared to placebo.
December 2025 in “The Journal of Dermatology” This study reported that ritlecitinib effectively improved hair regrowth in JAK inhibitor-naïve adolescent patients with severe alopecia areata, achieving significant reductions in SALT scores within 24 weeks, but was less effective for patients who had previously been treated with baricitinib.
November 2025 in “Journal of Investigative Dermatology” Ritlecitinib effectively treats severe Alopecia Areata by reducing harmful immune activity in the skin.
October 2025 in “International Journal of Dermatology” Lasheras-Pérez et al. reported that JAK3 and TYK2 proteins are activated in certain forms of primary cicatricial alopecia, suggesting the JAK/TYK/STAT pathway as a potential therapeutic target for these conditions.
January 2021 in “Digital Commons - PCOM (Philadelphia College of Osteopathic Medicine)” This review discusses recent findings related to sebaceous gland conditions, including updated recommendations for screening in sebaceous neoplasms and potential treatments for acne vulgaris, though no new definitive clinical results are reported.
April 2020 in “The FASEB journal” In in-vitro experiments, this study found that poncirin showed higher inhibitory activity against JAK3 than tofacitinib, suggesting potential for alopecia areata treatment.
July 2026 in “Skin Appendage Disorders” In this study, patients with treatment-refractory alopecia areata who received oral ritlecitinib 50 mg daily experienced significant hair regrowth, with 52.6% achieving complete scalp regrowth and improved Severity of Alopecia Tool scores, indicating its potential effectiveness in real-world settings.
June 2026 in “Journal of health economics and outcomes research” In this study, researchers found that ritlecitinib 50 mg offered a lower cost per responder than baricitinib 2 or 4 mg at both 24 and 52 weeks for treating severe alopecia areata, suggesting potential implications for reimbursement or formulary decisions.
June 2026 in “Journal of Investigative Dermatology” This study reported that the anti-γc antibody hC2 restored hair follicle homeostasis and suppressed hair loss in an AA-like mouse model by inhibiting autoreactive T-cell activity, suggesting that hC2 may offer a safer and more effective treatment for alopecia areata compared to current Jak inhibitors.
February 2026 in “International Journal of Dermatology” In a single-center study, adolescents with moderate-to-severe alopecia areata treated with ritlecitinib 50 mg daily for 24 weeks showed significant hair regrowth, with 27.3% achieving near-complete regrowth and 45.5% substantial improvement, without serious safety concerns, according to these researchers.
December 2025 in “Actas Dermo-Sifiliográficas” This review analyzes the mechanism and evidence supporting the approved use of ritlecitinib, a JAK3/TEC kinase inhibitor, for treating severe alopecia areata in patients aged 12 and older, highlighting its role in the changing therapeutic landscape of this immune-mediated disease.
July 2025 in “SKIN The Journal of Cutaneous Medicine” This study describes characteristics and outcomes for adults initiating ritlecitinib for severe alopecia areata, highlighting increased hair regrowth and physician satisfaction with longer treatment durations, despite ongoing psychosocial impacts like embarrassment and anxiety among patients.
In this study, ritlecitinib treatment for 12 and 24 weeks downregulated immunity-related genes and upregulated hair keratin genes in patients with alopecia areata, correlating with scalp hair regrowth response.
May 2025 in “Journal of the European Academy of Dermatology and Venereology” This study found that 45.5% of alopecia areata patients treated with ritlecitinib 50 mg daily achieved significant hair regrowth, with most maintaining their response over 24 months.
February 2025 in “International Journal of STD & AIDS” In this case report, a patient with HIV developed hirsutism after starting tofacitinib for alopecia areata, which resolved upon medication discontinuation and laser hair removal.
December 2024 in “Clinical and Experimental Dermatology” In this study, researchers found that ritlecitinib, a JAK3/TEC inhibitor, significantly improves hair regrowth, quality of life, and psychological well-being in patients with severe alopecia areata who had inadequate or no response to baricitinib, a JAK1/2 inhibitor.
November 2024 in “SKIN The Journal of Cutaneous Medicine” This study found that ritlecitinib, taken daily, led to scalp, eyebrow, and eyelash hair regrowth in patients aged 12 and older with severe and very severe alopecia areata over a 24-month period.
November 2024 in “SKIN The Journal of Cutaneous Medicine” This study found that daily treatment with ritlecitinib 50 mg over 24 months reduced the number of patients in the highest categories of scalp hair loss, with improvements seen in patient responses over time.
August 2024 in “Bioorganic Chemistry” This study found that oral administration of cedrol, a component of ginger, improved hair regeneration and reduced hair follicle damage in cyclophosphamide-induced alopecia areata in mice more effectively than external administration, by enhancing cytokine expression and modulating key signaling pathways.
July 2024 in “Journal of Investigative Dermatology” ITK inhibitors may effectively treat alopecia areata.
July 2024 in “Journal of Investigative Dermatology” OR101 may effectively treat atopic dermatitis and similar skin conditions.
December 2023 in “Journal of Ayub Medical College Abbottabad” In this study, Ritlecitinib was reported as a newly approved treatment for alopecia areata that can be used in patients aged 12 and older; after 24 weeks, it resulted in 80% or more scalp hair coverage in treated patients compared to a placebo.