Alopecia Areata: From Immunopathogenesis to Emerging Therapeutic Approaches

    November 2025 in “ Frontiers in Immunology ”
    Su‐Young Kim, Hyun Joo Lee, Jeong Heo … Joon Seok
    Studysummary This review discusses the role of immune cells in the pathogenesis of alopecia areata and highlights emerging immunomodulatory strategies and novel therapeutic targets aimed at offering more effective and durable treatments for this autoimmune hair loss disorder.
    Automatically generated from the study's abstract, not written by a person, and not a review of the full paper. Not medical advice or a treatment recommendation. Read the original study, and consult a qualified healthcare professional before changing treatment. Full disclaimer
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    Research cited in this study 66

    1. Single-Cell Analysis of Temporal Immune Cell Dynamics in Alopecia Areata Reveals a Causal Role for Clonally Expanded CD8+ T Cells in Disease Cell Reports · 2025
    2. Janus Kinase Inhibitors for Alopecia Areata: A Review of Clinical Data Frontiers in Immunology · 2025
    3. Local Corticosteroids for Alopecia Areata: A Narrative Review Dermatology and Therapy · 2025
    4. Alopecia Areata: Pathogenesis, Diagnosis, And Therapies MedComm · 2025
    5. Modulating Immune Responses in Alopecia: Therapeutic Insights and Potential Targets of Antisense Oligonucleotides BMC Immunology · 2025
    6. The Relative Efficacy and Safety of Monotherapies for Alopecia Areata: A Network Meta-Analysis Study Journal of Cosmetic Dermatology · 2025
    7. IKZF1 and Ikaros Overexpression Results in Alopecia Areata-Like Phenotype in Mice Experimental Dermatology · 2025
    8. Patterns of Clinical Response in Patients With Alopecia Areata Treated With Ritlecitinib in the Allegro Clinical Development Programme Journal of the European Academy of Dermatology and Venereology · 2025
    9. Long-Term Safety and Efficacy of Ritlecitinib in Adults and Adolescents with Alopecia Areata and at Least 25% Scalp Hair Loss: Results from the ALLEGRO-LT Phase 3, Open-Label Study Journal of the European Academy of Dermatology and Venereology · 2025
    10. Mechanism of PPARα Agonist in Alopecia Areata American Journal of Translational Research · 2025
    11. Hematological Ratios as an Indicator of Severity in Alopecia Areata: A Retrospective Nationwide Study PLoS ONE · 2024
    12. Systematic Review and Indirect Treatment Comparisons of Ritlecitinib Against Baricitinib in Alopecia Areata Journal of the European Academy of Dermatology and Venereology · 2024
    13. Mesenchymal Stem Cell Therapy in Alopecia Areata: Visual and Molecular Evidence from a Mouse Model International Journal of Molecular Sciences · 2024
    14. Baricitinib Withdrawal and Retreatment in Patients With Severe Alopecia Areata JAMA Dermatology · 2024
    15. Alopecia Areata Exhibits Cutaneous And Systemic OX40 Activation Across Atopic Backgrounds Allergy · 2024
    16. Efficacy and Safety of Deuruxolitinib, an Oral Selective Janus Kinase Inhibitor, in Adults with Alopecia Areata: Results from the Phase 3 Randomized, Controlled Trial (THRIVE-AA1) Journal of the American Academy of Dermatology · 2024
    17. Deciphering the Complex Immunopathogenesis of Alopecia Areata International Journal of Molecular Sciences · 2024
    18. Comparative Efficacy and Safety of JAK Inhibitors in the Treatment of Moderate-to-Severe Alopecia Areata: A Systematic Review and Network Meta-Analysis Frontiers in pharmacology · 2024
    19. Long-Term Efficacy and Safety of Baricitinib in Patients With Severe Alopecia Areata: 104-Week Results From BRAVE-AA1 and BRAVE-AA2 Journal of the European Academy of Dermatology and Venereology · 2024
    20. Dupilumab Therapy for Alopecia Areata: A Case Series and Review of the Literature Journal of Dermatological Treatment · 2024
    21. CXCL12 Neutralizing Antibody Promotes Hair Growth in Androgenic Alopecia and Alopecia Areata International Journal of Molecular Sciences · 2024
    22. Inhibition of T-Cell Activity in Alopecia Areata: Recent Developments and New Directions Frontiers in immunology · 2023
    23. Functional Interrogation of Lymphocyte Subsets in Alopecia Areata Using Single-Cell RNA Sequencing Proceedings of the National Academy of Sciences · 2023
    24. SIRT1 Downregulation Provokes Immune-Inflammatory Responses in Hair Follicle Outer Root Sheath Cells and May Contribute to Development of Alopecia Areata Journal of Dermatological Science · 2023
    25. The Potential of Regulatory T Cell-Based Therapies for Alopecia Areata Frontiers in Immunology · 2023
    26. Alopecia Areata: An Updated Review for 2023 Journal of Cutaneous Medicine and Surgery · 2023
    27. Efficacy and Safety of Ritlecitinib in Adults and Adolescents With Alopecia Areata: A Randomised, Double-Blind, Multicentre, Phase 2b–3 Trial The Lancet · 2023
    28. Efficacy and Safety of Baricitinib in Patients with Severe Alopecia Areata Over 52 Weeks in Phase III Trials American Journal of Clinical Dermatology · 2023
    29. Diverse Role of OX40 on T Cells as a Therapeutic Target for Skin Diseases Journal of Investigative Dermatology · 2023
    30. Involvement of ILC1-Like Innate Lymphocytes in Human Autoimmunity: Lessons from Alopecia Areata eLife · 2023
    31. Induction of T Cell Exhaustion by JAK1/3 Inhibition in the Treatment of Alopecia Areata Frontiers in immunology · 2022
    32. An Overview of JAK/STAT Pathways and JAK Inhibition in Alopecia Areata Frontiers in immunology · 2022
    33. Selective Expansion of Tregs Using the IL-2 Cytokine Antibody Complex Does Not Reverse Established Alopecia Areata in C3H/HeJ Mice Frontiers in immunology · 2022
    34. Autoantigen Discovery in the Hair Loss Disorder, Alopecia Areata: Implications of Post-Translational Modifications Frontiers in immunology · 2022
    35. The Role of Serum Th1, Th2, and Th17 Cytokines in Patients with Alopecia Areata: Clinical Implications Cells · 2021
    36. Ritlecitinib And Brepocitinib Demonstrate Significant Improvement In Scalp Alopecia Areata Biomarkers ˆThe ‰journal of allergy and clinical immunology/Journal of allergy and clinical immunology/˜The œjournal of allergy and clinical immunology · 2021
    37. Alopecia Areata: An Update on Etiopathogenesis, Diagnosis, and Management Clinical Reviews in Allergy & Immunology · 2021
    38. Hair Growth Promotion by Necrostatin-1s Scientific Reports · 2020
    39. Pro-Inflammatory Vδ1+ T-Cells Infiltrates Are Present In And Around The Hair Bulbs Of Non-Lesional And Lesional Alopecia Areata Hair Follicles Journal of Dermatological Science · 2020
    40. Low-Dose IL-2 for Treating Moderate to Severe Alopecia Areata: A 52-Week Multicenter Prospective Placebo-Controlled Study Assessing Its Impact on T Regulatory Cell and NK Cell Populations ˜The œjournal of investigative dermatology/Journal of investigative dermatology · 2020
    41. Alopecia Areata Patients Show Deficiency of FOXP3+CD39+ T Regulatory Cells and Clonotypic Restriction of Treg TCRβ-Chain, Highlighting the Immunopathological Aspect of the Disease PloS one · 2019
    42. Alopecia Areata Is Characterized by Dysregulation in Systemic Type 17 and Type 2 Cytokines, Which May Contribute to Disease-Associated Psychological Morbidity British journal of dermatology/British journal of dermatology, Supplement · 2019
    43. High-Throughput T Cell Receptor Sequencing Identifies Clonally Expanded CD8+ T Cell Populations in Alopecia Areata JCI insight · 2018
    44. An Integrated Model of Alopecia Areata Biomarkers Highlights Both TH1 and TH2 Upregulation Journal of Allergy and Clinical Immunology · 2018
    45. iNKT Cells Ameliorate Human Autoimmunity: Lessons from Alopecia Areata Journal of autoimmunity · 2018
    46. Efficacy of Diphenylcyclopropenone in Alopecia Areata: A Comparison of Two Treatment Regimens Postępy Dermatologii i Alergologii · 2018
    47. Pharmacologic Inhibition of JAK-STAT Signaling Promotes Hair Growth Science Advances · 2015
    48. Alopecia Areata Profiling Shows TH1, TH2, and IL-23 Cytokine Activation Without Parallel TH17/TH22 Skewing ˆThe ‰journal of allergy and clinical immunology/Journal of allergy and clinical immunology/˜The œjournal of allergy and clinical immunology · 2015
    49. Imbalance of T-Helper 17 and Regulatory T Cells in Patients with Alopecia Areata The Journal of Dermatology · 2015
    50. Hair Regrowth in Alopecia Areata Patients Following Stem Cell Educator Therapy BMC medicine · 2015
    51. The Genetics Of Alopecia Areata: New Approaches, New Findings, New Treatments Journal of Dermatological Science · 2015
    52. Plasmacytoid Dendritic Cells in Alopecia Areata: Missing Link? Journal of the European Academy of Dermatology and Venereology · 2014
    53. Diagnostic Usefulness of a Peribulbar Eosinophilic Infiltrate in Alopecia Areata JAMA Dermatology · 2014
    54. Alopecia Areata Is Driven by Cytotoxic T Lymphocytes and Is Reversed by JAK Inhibition Nature medicine · 2014
    55. Tolerance Induction by Hair-Specific Keratins in Murine Alopecia Areata Journal of Leukocyte Biology · 2013
    56. Histologic Features of Alopecia Areata Other Than Peribulbar Lymphocytic Infiltrates 2011
    57. Trichohyalin Is a Potential Major Autoantigen in Human Alopecia Areata Journal of Proteome Research · 2010
    58. Genome-Wide Association Study in Alopecia Areata Implicates Both Innate and Adaptive Immunity Nature · 2010
    59. Alopecia Areata as Another Immune-Mediated Disease Developed in Patients Treated with Tumor Necrosis Factor-Alpha Blocker Agents Journal of the European Academy of Dermatology and Venereology · 2010
    60. Experimental Evaluation of Ebastine, a Second-Generation Antihistamine, as a Supportive Medication for Alopecia Areata Journal of Dermatological Science · 2010
    61. Maintenance of Hair Follicle Immune Privilege Is Linked to Prevention of NK Cell Attack Journal of Investigative Dermatology · 2007
    62. Recurrence of Alopecia Areata in a Patient Receiving Etanercept Injections Archives of Dermatology · 2005
    63. Characterization of Hair Follicle Antigens Targeted by the Anti-Hair Follicle Immune Response Journal of Investigative Dermatology Symposium Proceedings · 2003
    64. Expression of Peroxisome Proliferator Activated Receptors (PPARs) in Human Hair Follicles and PPARα Involvement in Hair Growth Acta dermato-venereologica · 2000
    65. Eosinophils in Fibrous Tracts and Near Hair Bulbs: A Helpful Diagnostic Feature of Alopecia Areata Journal of the American Academy of Dermatology · 2000
    66. Eosinophils in Fibrous Tracts and Near Hair Bulbs: A Helpful Diagnostic Feature of Alopecia Areata Journal of The American Academy of Dermatology · 1997