Insights Into the Context-Dependent Immunological Roles of the CXCL12–CXCR4 Axis in Alopecia

    April 2026 in “ Frontiers in Immunology ”
    Jong-Hyuk Sung, Mei Zheng, In Guk Park … Minsoo Noh
    Studysummary This study concluded that the CXCL12–CXCR4 signaling pathway significantly contributes to hair loss in androgenetic alopecia and alopecia areata by promoting inflammation and fibrosis, whereas inhibiting this pathway can restore hair growth and follicle health.
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    Research cited in this study 11

    1. Regulatory T Cells in Skin Utilize the Cxcr4-Cxcl12 Axis to Promote Hair Follicle Regeneration Cell Reports · 2025
    2. CXCL12 Drives Reversible Fibroimmune Remodeling in Androgenetic Alopecia Revealed by Single-Cell RNA Sequencing International Journal of Molecular Sciences · 2025
    3. 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
    4. Differential Expression of CXCL12 in Human and Mouse Hair: Androgens Induce CXCL12 in Human Dermal Papilla and Dermal Sheath Cup International Journal of Molecular Sciences · 2024
    5. Humanized CXCL12 Antibody Delays Onset and Modulates Immune Response in Alopecia Areata Mice: Insights from Single-Cell RNA Sequencing Frontiers in Immunology · 2024
    6. CXCL12 Neutralizing Antibody Promotes Hair Growth in Androgenic Alopecia and Alopecia Areata International Journal of Molecular Sciences · 2024
    7. Functional Interrogation of Lymphocyte Subsets in Alopecia Areata Using Single-Cell RNA Sequencing Proceedings of the National Academy of Sciences · 2023
    8. CXCL12 Inhibits Hair Growth Through CXCR4 Biomedicine & Pharmacotherapy · 2022
    9. Resident Human Dermal Gamma Delta T-Cells Operate as Stress Sentinels: Lessons from the Hair Follicle Journal of Autoimmunity · 2021
    10. 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
    11. Protective Effects of Human Umbilical Cord Blood-Derived Mesenchymal Stem Cells Against Dexamethasone-Induced Apoptotic Cell Death in Hair Follicles International Journal of Molecular Medicine · 2019