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The common YAP activation mediates corneal epithelial regeneration and repair with different-sized wounds.

Yijian LiLingling GeXia ChenYumei MaoXianliang GuBangqi RenYuxiao ZengMin ChenSiyu ChenJinhua LiuYuli YangHaiwei Xu
Published in: NPJ Regenerative medicine (2021)
Regeneration/repair after injury can be endowed by adult stem cells (ASCs) or lineage restricted and even terminally differentiated cells. In corneal epithelium, regeneration after a large wound depends on ASCs (limbal epithelial stem cells, LESCs), whereas repair after a small wound is LESCs-independent. Here, using rat corneal epithelial wounds with different sizes, we show that YAP activation promotes the activation and expansion of LESCs after a large wound, as well as the reprogramming of local epithelial cells (repairing epithelial cells) after a small wound, which contributes to LESCs-dependent and -independent wound healing, respectively. Mechanically, we highlight that the reciprocal regulation of YAP activity and the assembly of cell junction and cortical F-actin cytoskeleton accelerates corneal epithelial healing with different-sized wounds. Together, the common YAP activation and the underlying regulatory mechanism are harnessed by LESCs and lineage-restricted epithelial cells to cope with corneal epithelial wounds with different sizes.
Keyphrases
  • wound healing
  • stem cells
  • single cell
  • cell therapy
  • induced apoptosis
  • oxidative stress
  • transcription factor
  • endoplasmic reticulum stress
  • bone marrow
  • childhood cancer