ROS-mediated Different Homeostasis of Murine Corneal Epithelial Progenitor Cell Line under Oxidative Stress

Sci Rep. 2016 Nov 2:6:36481. doi: 10.1038/srep36481.

Abstract

The role of ROS in stem cell biology has not been fully illustrated and understood. Here we compared the different responses and investigated the mechanism underlying oxidative stress induced by hydrogen peroxide (H2O2) between murine corneal epithelial progenitor cell line (TKE2) and mature murine corneal epithelial cells (MCE). TKE2 showed a different homeostasis and strong resistance to H2O2. TKE2 reduced the production of ROS, inhibited ROS generation enzyme NADPH oxidase 4 (NOX4), and increased dual specificity phosphatase 6 (DUSP6). Furthermore, TKE2 activated nuclear factor (erythroid-derived 2)-like 2 (NRF2) signaling pathway, regulated miR-125B1 and miR-29B1, and elevated levels of antioxidants glutathione S-transferase P (GSTP) and superoxide dismutases (SOD). The association with ROS of the cells was also verified by RNA interference approach and pharmacological antagonization. In addition, TKE2 enhanced the autophagy after exposure to H2O2. The novel evidence suggests that TKE2 cells have different homeostasis and strong antioxidant properties against oxidative stress via the regulation of ROS formation and pathway.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Autophagy / drug effects
  • Cell Survival / drug effects
  • Cells, Cultured
  • Dual Specificity Phosphatase 6 / metabolism
  • Epithelium, Corneal / cytology
  • Glutathione Transferase / metabolism
  • Hydrogen Peroxide / toxicity*
  • Male
  • Mice
  • Mice, Inbred C57BL
  • MicroRNAs / metabolism
  • NADPH Oxidase 4 / antagonists & inhibitors
  • NADPH Oxidase 4 / genetics
  • NADPH Oxidase 4 / metabolism
  • NF-E2-Related Factor 2 / metabolism
  • Oxidative Stress / drug effects*
  • RNA Interference
  • RNA, Small Interfering / metabolism
  • Reactive Oxygen Species / metabolism*
  • Signal Transduction / drug effects
  • Stem Cells / cytology
  • Stem Cells / drug effects
  • Stem Cells / metabolism
  • Superoxide Dismutase / metabolism

Substances

  • MicroRNAs
  • NF-E2-Related Factor 2
  • RNA, Small Interfering
  • Reactive Oxygen Species
  • Hydrogen Peroxide
  • Superoxide Dismutase
  • NADPH Oxidase 4
  • Nox4 protein, mouse
  • Glutathione Transferase
  • Dual Specificity Phosphatase 6
  • Dusp6 protein, mouse