The regulation of skin homeostasis, repair and the pathogenesis of skin diseases by spatiotemporal activation of epidermal mTOR signaling

The epidermis, the outmost layer of the skin, is a stratified squamous epithelium that protects the body from the external world. The epidermis and its appendages need constantly renew themselves and replace the damaged tissues caused by environmental assaults. The mechanistic target of rapamycin (m...

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Published inFrontiers in cell and developmental biology Vol. 10; p. 950973
Main Authors Wang, Juan, Cui, Baiping, Chen, Zhongjian, Ding, Xiaolei
Format Journal Article
LanguageEnglish
Published Frontiers Media S.A 22.07.2022
Subjects
Cell and Developmental Biology
epidermis
keratinocytes
metabolism
mTOR
wound healing
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Summary:The epidermis, the outmost layer of the skin, is a stratified squamous epithelium that protects the body from the external world. The epidermis and its appendages need constantly renew themselves and replace the damaged tissues caused by environmental assaults. The mechanistic target of rapamycin (mTOR) signaling is a central controller of cell growth and metabolism that plays a critical role in development, homeostasis and diseases. Recent findings suggest that mTOR signaling is activated in a spatiotemporal and context-dependent manner in the epidermis, coordinating diverse skin homeostatic processes. Dysregulation of mTOR signaling underlies the pathogenesis of skin diseases, including psoriasis and skin cancer. In this review, we discuss the role of epidermal mTOR signaling activity and function in skin, with a focus on skin barrier formation, hair regeneration, wound repair, as well as skin pathological disorders. We propose that fine-tuned control of mTOR signaling is essential for epidermal structural and functional integrity.
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Reviewed by: Rosa Ventrella, Midwestern University, United States
This article was submitted to Cell Growth and Division, a section of the journal Frontiers in Cell and Developmental Biology
These authors have contributed equally to this work
Edited by: Elena Goncharova, University of California, Davis, United States
Xin Zhiguo Li, University of Rochester, United States
ISSN:2296-634X
2296-634X
DOI:10.3389/fcell.2022.950973