Treated dentin matrix induces odontogenic differentiation of dental pulp stem cells via regulation of Wnt/β-catenin signaling  

作　　者：Sirui Liu Jingjing Sun Shuai Yuan Yanyu Yang Yuping Gong Ying Wang Runying Guo Xue Zhang Yiming Liu Hongyan Mi Meiyue Wang Mengzhe Liu Rui Li 

机构地区：[1]Department of Stomatology,The First Affiliated Hospital of Zhengzhou University,Zhengzhou,China [2]Academy of Medical Sciences at Zhengzhou University,Zhengzhou,China [3]College of Materials Science and Engineering,Zhengzhou University Zhengzhou,Henan 450001,China

出　　处：《Bioactive Materials》2022年第1期85-97,共13页生物活性材料（英文）

基　　金：This study was funded by the National Natural Science Foundation of China(grant numbers 31670994,U1904145,and 81901039);Nature Science Foundation of Henan province(grant number 182300410340);and Union project of Medical and Technology Research Program of Henan Province(grant number LHGJ20190191).

摘　　要：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 GSK3βwas 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 GSK3βexpression in new dentin.Consistently,the GSK3βknockdown hDPSCs performed enhanced odotogenesis compared with the control groups.However,GSK3βoverexpressing 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 GSK3βand activating the canonical Wnt/β-catenin signaling pathway and provide a theoretical basis for tooth regeneration engineering.

关 键 词：Dental pulp stem cells Treated dentin matrix GSK3Β Odontogenic differentiation Wnt/β-catenin signaling pathway 

分 类 号：R781[医药卫生—口腔医学]