Dab2, an Adaptor Protein, Regulates Self-Renewal of Hair Follicle Stem Cells

    May 2024 in “ Communications Biology
    Sayoni Roy, Darshan Mehta, Akshay Paradkar, Gopal Chovatiya, Sanjeev K. Waghmare
    TLDR Dab2 protein is crucial for hair follicle stem cell renewal and preventing early aging.
    The study investigates the role of the adaptor protein Disabled 2 (Dab2) in hair follicle stem cells (HFSCs) using Dab2 conditional knockout (Dab2-cKO) mice. Findings reveal that Dab2-cKO mice experience a delay in the hair follicle cycle due to disrupted HFSC activation, a reduction in HFSC numbers, and diminished colony-forming ability. These mice also exhibit extended HFSC quiescence with increased Nfatc1 expression and decreased expression of anti-aging genes like Col17a1, decorin, Sirt2, and Sirt7. Additionally, aged Dab2-cKO mice fail to fully recover their hair coat, indicating accelerated aging. This study is the first to demonstrate Dab2's critical role in regulating HFSC activation and self-renewal.
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