Abstract
Recent studies have demonstrated that the Wnt/β-catenin signaling plays an important role in stem cell aging. However, the mechanisms of cell senescence induced by Wnt/β-catenin signaling are still poorly understood. Our preliminary study has indicated that activated Wnt/β-catenin signaling can induce MSC aging. In this study, we reported that the Wnt/β-catenin signaling was a potent activator of reactive oxygen species (ROS) generation in MSCs. After scavenging ROS with N-acetylcysteine, Wnt/β-catenin signaling-induced MSC aging was significantly attenuated and the DNA damage and the expression of p16INK4A, p53, and p21 were reduced in MSCs. These results indicated that the Wnt/β-catenin signaling could induce MSC aging through promoting the intracellular production of ROS, and ROS may be the main mediators of MSC aging induced by excessive activation of Wnt/β-catenin signaling.
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Abbreviations
- MSCs:
-
Mesenchymal stem cells
- NAC:
-
N-acetylcysteine
- DCFH-DA:
-
2′,7′-Dichlorfluorescein-diacetate
- SOD:
-
Superoxide dismutase
- MDA:
-
Malondialdehyde
- SDS-PAGE:
-
Sodium dodecyl sulfate–polyacrylamide gel electrophoresis
- FITC:
-
Fluorescein isothiocyanate
- DAPI:
-
4′,6-Diamidino-2-phenylindole
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Acknowledgments
The authors gratefully acknowledge financial support from the Teachers Research Fund of Zhejiang University City College (J-12019, J-12021), the Student Research Fund of Zhejiang University City College (XZ2012562091, X2012562098), the Zhejiang Provincial Foundation of National Science (LQ12H31001), and the Science Research Foundation of the Zhejiang Health Bureau (2012KYA068, 2012KYB066).
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Zhang, Dy., Pan, Y., Zhang, C. et al. Wnt/β-catenin signaling induces the aging of mesenchymal stem cells through promoting the ROS production. Mol Cell Biochem 374, 13–20 (2013). https://doi.org/10.1007/s11010-012-1498-1
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DOI: https://doi.org/10.1007/s11010-012-1498-1