Down-Regulation of Shh in the Hair Follicles of Mice During Chemotherapy-Induced Hair Loss Is Mediated by the JAK/STAT1 Signaling Pathway

    November 2025 in “ FEBS Open Bio ”
    Ruifang Fan, Jingling Huang, Xiang Lin … Guixuan Zhou
    Studysummary In this study, the researchers using Shh-GFP<sup>+/-</sup> mice found that cyclophosphamide-induced alopecia involves the JAK/STAT1 pathway, where STAT1 binds the Shh gene promoter, decreasing Shh-expressing cells in hair follicles. Treatment with JAK inhibitors helped rescue hair loss, implicating the JAK/STAT1 pathway in this process.
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    Research cited in this study 6

    1. JAK-STAT1 as Therapeutic Target for EGFR Deficiency-Associated Inflammation and Scarring Alopecia EMBO Molecular Medicine · 2024
    2. Pharmacologic Inhibition of JAK-STAT Signaling Promotes Hair Growth Science Advances · 2015
    3. Testing Chemotherapeutic Agents in the Feather Follicle Identifies a Selective Blockade of Cell Proliferation and a Key Role for Sonic Hedgehog Signaling in Chemotherapy-Induced Tissue Damage Journal of Investigative Dermatology · 2014
    4. Chemotherapy-Induced Alopecia Current Opinion in Supportive and Palliative Care · 2010
    5. Noggin Is Required for Induction of the Hair Follicle Growth Phase in Postnatal Skin The FASEB Journal · 2001
    6. Conditional Disruption of Hedgehog Signaling Pathway Defines Its Critical Role in Hair Development and Regeneration Journal of Investigative Dermatology · 2000