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Abstract

Medicine

使用诱导型成骨细胞谱系特异性 Stat3 敲除小鼠研究正畸牙齿移动过程中的牙槽骨重塑

Published: July 21st, 2023

DOI:

10.3791/65613

1Center of Craniofacial Orthodontics, Department of Oral and Cranio-maxillofacial Surgery, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, 2College of Stomatology, Shanghai Jiao Tong University, 3National Center for Stomatology, 4National Clinical Research Center for Oral Diseases, 5Shanghai Key Laboratory of Stomatology, 6Shanghai Starriver Bilingual School, 7The 2nd Dental Center, Ninth People’s Hospital, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine
* These authors contributed equally

牙槽骨,周转率高,是人体重塑最活跃的骨骼。正畸牙齿移动 (OTM) 是一种常见的人工过程,即响应机械力进行牙槽骨重塑,但其潜在机制仍然难以捉摸。由于动物模型相关的限制,以往的研究无法揭示任何时间和空间骨重塑的确切机制。信号转导和转录激活因子 3 (STAT3) 在骨代谢中很重要,但其在 OTM 期间成骨细胞中的作用尚不清楚。为了提供 体内 证据证明 STAT3 在特定时间点参与 OTM,特别是在 OTM 期间参与细胞,我们生成了他莫昔芬诱导的成骨细胞谱系特异性 Stat3 敲除小鼠模型,施加正畸力,并分析牙槽骨表型。

显微计算机断层扫描(Micro-CT)和立体显微镜用于访问OTM距离。组织学分析选择位于上颌骨横截面第一磨牙(M1)三个根部内的区域作为感兴趣区域(ROI),评估成骨细胞和破骨细胞的代谢活性,表明正畸力对牙槽骨的影响。简而言之,我们提供了一种使用诱导型成骨细胞谱系特异性 Stat3 敲除小鼠来研究正畸力下的骨重塑的方案,并描述了分析 OTM 期间牙槽骨重塑的方法,从而为骨骼机械生物学提供了新的思路。

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