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    Glossary Epithelial Sac

    small, enclosed structure of epithelial cells around hair follicle

    An epithelial sac is a small, enclosed structure composed of epithelial cells, which are cells that line the surfaces and cavities of the body. In the context of hair biology, an epithelial sac can refer to the structure that surrounds the developing hair follicle, playing a crucial role in the formation and growth of hair. This sac provides a protective environment and supplies necessary nutrients to the growing hair shaft.

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    1. Expression of Calcium-Binding S100 Proteins A4 and A6 in Regions of the Epithelial Sac Associated with the Onset of Hair Follicle Regeneration Journal of Investigative Dermatology · 2001 · 72 citations
    2. Characterization and Chromosomal Localization of Human Hair-Specific Keratin Genes and Comparative Expression During the Hair Growth Cycle 1998 · 32 citations
    3. Exogen involves gradual release of the hair club fibre in the vibrissa follicle model Experimental Dermatology · 2009 · 14 citations
    4. Outer root sheath keratinization in anagen and catagen of the mammalian hair follicle. A seventh distinct type of keratinization in the hair follicle: trichilemmal keratinization. PubMed · 1981 · 59 citations
    5. Mesenchymal stem cell-derived exosomes ameliorate gentamicin-induced vestibular hair cell injury by regulating the SNARE pathway and enhancing autophagy Stem Cell Research & Therapy · 2025 · 1 citations
    6. Evaluation of immunoreactivity of normal tissues from dogs, using monoclonal antibody B72.3 American Journal of Veterinary Research · 1994
    7. Histological Study for Skin of Horse 2023
    8. The Dermis of Millivora Capenesis American International Journal of Humanities Arts and Social Sciences · 2019
    9. Cornified Epithelial Teeth of Jawless Vertebrates Contain Proteins Similar to Keratin-Associated Proteins of Mammalian Skin Appendages Journal of Developmental Biology · 2025
    10. Transglutaminase Activity Is Conserved in Stratified Epithelia and Skin Appendages of Mammals and Birds International journal of molecular sciences · 2023 · 8 citations
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    1. Adipocyte lipolysis activates epithelial stem cells for hair regeneration through fatty acid metabolic signaling Reddit · 26 Oct 2025

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