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Liu S, Sun J, Yuan S, Yang Y, Gong Y, Wang Y, Guo R, Zhang X, Liu Y, Mi H, Wang M, Liu M, Li R. Treated dentin matrix induces odontogenic differentiation of dental pulp stem cells via regulation of Wnt/β-catenin signaling. Bioact Mater 2022; 7:85-97. [PMID: 34466719 PMCID: PMC8379347 DOI: 10.1016/j.bioactmat.2021.05.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 04/03/2021] [Accepted: 05/14/2021] [Indexed: 12/26/2022] Open
Abstract
Treated dentin matrix (TDM) is an ideal scaffold material containing multiple extracellular matrix factors. The canonical Wnt signaling pathway is necessary for tooth regeneration. Thus, this study investigated whether the TDM can promote the odontogenic differentiation of human dental pulp stem cells (hDPSCs) and determined the potential role of Wnt/β-catenin signaling in this process. Different concentrations of TDM promoted the dental differentiation of the hDPSCs and meanwhile, the expression of GSK3β was decreased. Of note, the expression of the Wnt/β-catenin pathway-related genes changed significantly in the context of TDM induction, as per RNA sequencing (RNA seq) data. In addition, the experiment showed that new dentin was visible in rat mandible cultured with TDM, and the thickness was significantly thicker than that of the control group. In addition, immunohistochemical staining showed lower GSK3β expression in new dentin. Consistently, the GSK3β knockdown hDPSCs performed enhanced odotogenesis compared with the control groups. However, GSK3β overexpressing could decrease odotogenesis of TDM-induced hDPSCs. These results were confirmed in immunodeficient mice and Wistar rats. These suggest that TDM promotes odontogenic differentiation of hDPSCs by directly targeting GSK3β and activating the canonical Wnt/β-catenin signaling pathway and provide a theoretical basis for tooth regeneration engineering.
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Affiliation(s)
- Sirui Liu
- Department of Stomatology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- Academy of Medical Sciences at Zhengzhou University, Zhengzhou, China
| | - Jingjing Sun
- Department of Stomatology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Shuai Yuan
- Department of Stomatology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Yanyu Yang
- College of Materials Science and Engineering, Zhengzhou University Zhengzhou, Henan 450001, China
| | - Yuping Gong
- Department of Stomatology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Ying Wang
- Department of Stomatology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Runying Guo
- Department of Stomatology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- Academy of Medical Sciences at Zhengzhou University, Zhengzhou, China
| | - Xue Zhang
- Department of Stomatology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Yiming Liu
- Department of Stomatology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Hongyan Mi
- Department of Stomatology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Meiyue Wang
- Department of Stomatology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Mengzhe Liu
- Department of Stomatology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Rui Li
- Department of Stomatology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
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