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[Epidermal stem cells].

V V Terskikh, A V Vasil'ev

    Izvestiia Akademii Nauk. Seriia Biologicheskaia
    |June 2, 2005
    PubMed
    Summary

    Identifying epidermal stem cells remains challenging. Research suggests stem and transit-amplifying cells form a continuum, with hair follicles likely housing the main epidermal stem cell repository.

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    Area of Science:

    • Dermatology
    • Stem Cell Biology
    • Cell Biology

    Background:

    • The epidermis harbors stem cells, but reliable identification criteria are lacking.
    • Epidermal stem cells exhibit varying maturity levels.
    • Hair follicles are hypothesized as the primary reservoir for epidermal stem cells.

    Purpose of the Study:

    • To explore the characteristics and localization of epidermal stem cells.
    • To investigate the relationship between stem cells and transit-amplifying cells in the epidermis.
    • To understand the factors influencing epidermal stem cell fate.

    Main Methods:

    • Review of existing literature on epidermal stem cell biology.
    • Analysis of cell populations within epidermal proliferative units.
    • Examination of the stem cell niche and microenvironmental factors.

    Main Results:

    • A continuum exists between stem cells and transit-amplifying cells, rather than discrete populations.
    • Hair follicles are likely the main source of epidermal stem cells, contributing to epidermis and adnexal structures.
    • Stem cell fate is influenced by cellular prehistory and the microenvironment, including basal membrane adhesion and cell-cell interactions.

    Conclusions:

    • Current methods lack definitive criteria for identifying individual epidermal stem cells.
    • Epidermal stem cells and transit-amplifying cells represent a spectrum of renewal and differentiation potential.
    • The stem cell niche, encompassing physical and paracrine interactions, is crucial for regulating epidermal stem cell behavior.

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