Cellular Heterogeneity and Plasticity of Skin Epithelial Cells in Wound Healing and Tumorigenesis

    February 2022 in “ Stem cell reviews and reports
    Jingru Wang, Jia He, Meishu Zhu, Yu Han, Ronghua Yang, Hongwei Liu, Xuejuan Xu, Xiaodong Chen
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    TLDR Skin cells show flexibility in healing wounds and forming tumors, with potential for treating hair disorders and chronic ulcers.
    The document discusses the heterogeneity and plasticity of skin epithelial cells, particularly the role of adult stem cells in the epidermis in wound healing and tumorigenesis. It explains that the epidermis is composed of various cell types, including those from the interfollicular epidermis (IFE) and pilosebaceous unit (PSU), which are developed from multipotent embryonic progenitor keratinocytes. The document highlights that different stem cell populations exhibit functional flexibility in response to injury, mobilizing towards the wound site for repair. It also notes that the size of a wound can influence cellular plasticity, with de novo hair follicle formation present in large wounds. The document further discusses the role of different hair follicle stem cells in skin tumor heterogeneity and the origins of basal cell carcinoma (BCC). It concludes by discussing the potential of stem cells in regenerative medicine, particularly for treating hair disorders and chronic ulcers, but notes that more research is needed to understand the specific mechanisms regulating plasticity in skin epithelial cells.
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