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    • Restoring Sweat Gland Function in Mice Using Regenerative Sweat Gland Cells Derived from Chemically Reprogrammed Human Epidermal Keratinocytes

    Jiangbing Xiang,Huating Chen,Hongliang Zhang, Lu Wu,Yan Li,Shuaifei Ji,Wei Pi,Shaoyuan Cui,Lei Dong,Xiaobing Fu,Xiaoyan Sun

    SCIENCE BULLETIN（2024）

    Cited 0|Views1
    Abstract
    The regeneration of sweat glands (SwGs) plays a pivotal role in the functional recovery of extensive skin wounds. Recent research has illuminated the possibility of reprogramming human epidermal keratinocytes (HEKs) into induced SwG cells through the ectopic expression of ectodysplasin A. However, the clinical application of this genetic manipulation approach is inherently limited. In this study, we present findings demonstrating that a combination of six compounds can effectively and speedily reprogram HEKs in culture into fully functional SwG cells. These chemically induced SwG-like cells (ciSGCs) closely resemble the morphology, phenotypes, and functional properties of human primary SwG ductal cells. Furthermore, ciSGCs can be stimulated to differentiate into mature SwG cell types in vitro. In a 3D culture system, they can also generate SwG organoids that exhibit structural and biological features akin to native SwGs. Upon transplantation into scalded mouse paw skin, ciSGCs significantly expedited cutaneous wound healing and completely restored the structural and functional aspects of the SwGs. In conclusion, the small molecule cocktail-directed SwG reprogramming offers a non-transgenic and controllable strategy for producing high-quality, clinical-grade SwG cells, showing immense potential for the treatment of burn patients.
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    Key words
    Human epidermal keratinocytes,Sweat gland,Regeneration,Chemical reprogramming
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