Mobilizing Transit-Amplifying Cell-Derived Ectopic Progenitors to Prevent Hair Loss from Chemotherapy or Radiation Therapy

    March 2023
    Weixin Huang, Shiau Ting Lai, Hsien-Yi Chiu, Michael Chang, Maksim V. Plikus, Chih‐Chieh Chan, You-Tzung Chen, Po‐Nien Tsao, Tsung‐Lin Yang, Hsuan-Shu Lee, Peter Chi, Sung‐Jan Lin
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    TLDR Activating certain cells in hair follicles can prevent hair loss caused by cancer treatments.
    The study investigates how hair follicles (HFs) repair themselves after genotoxic damage from chemotherapy and radiation therapy, which often causes hair loss. It was found that after low-dose ionizing radiation (IR), keratin 5+ basal hair bulb progenitors, rather than quiescent stem cells (SCs) in the bulge, are activated to regenerate hair follicles. In cases of high-dose IR, surviving outer root sheath cells acquire an SC-like state to fuel HF regeneration. The study also revealed that IR-induced hair loss is associated with suppressed WNT signaling in a p53-dependent manner. Enhancing WNT signaling can counteract this suppression, promoting ectopic progenitor proliferation and preventing hair loss. This suggests that targeting transit-amplifying cell-derived progenitors for hair follicle repair could be a potential strategy to prevent hair loss from chemotherapy and radiotherapy.
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