Orthodontic tension promotes cementoblast mineralization by regulating autophagy

作者：Yi Zhao, Yuhui Yang, Hao Liu, Jia‐Yi Wang, Yiping Huang, Weiran Li · 发表于：Journal of Dental Sciences · 年份：2024 · DOI：10.1016/j.jds.2024.03.009 · 被引用次数：6 · 研究领域：Autophagy in Disease and Therapy、Bone and Dental Protein Studies、Alkaline Phosphatase Research Studies

External root resorption is a main side effect of orthodontic treatment and is more likely to occur on the pression side than the tension side. To explore the potential protective mechanisms on the tension side, this study investigated the influence of mechanical tension on cementoblast mineralization and elucidated the role of autophagy in mediating this process. Mechanical tension was applied to cementoblasts using iStrain. The expression of mineralization-related and autophagy-related markers was detected by qRT-PCR, Western blot analysis, and immunofluorescence staining. RNA sequencing identified key regulators. Immunohistochemical staining assessed related markers expression in in vivo experiments. Applying tension to cementoblasts increased mineralization-related gene expression in a force-dependent and time-dependent manner. The immunohistochemical staining result of in vivo experiments supported these findings, demonstrating elevated expression of mineralization markers under tension. Mechanical tension also enhanced autophagic activity in cementoblasts, which was demonstrated by the results of qRT-PCR, Western blot analysis, immunofluorescence staining, and in vivo experiments. Suppression of autophagy with chloroquine attenuated the mineralization of cementoblasts induced by tension stimulus. RNA-seq identified Postn as a key regulator, and the knockdown of Postn impaired the mechanical tension-promoted mineralization of cementoblasts. This study proposed the tensio...