正畸牙移动过程中Piezo1通道对张力侧血管生成和成骨的影响  

Effects of the Piezo1 channel on tension⁃side angiogenesis and osteogenic remodeling during orthodontic tooth movement

作　　者：邵丽鑫 王若飞 刘晓彤 张苗苗[1] SHAO Lixin;WANG Ruofei;LIU Xiaotong;ZHANG Miaomiao(The First Affiliated Hospital of Harbin Medical University&School of Stomatology,Harbin Medical University&Key Laboratory of Hepatosplenic Surgery,Ministry of Education,Harbin 150000,China)

机构地区：[1]哈尔滨医科大学附属第一医院,哈尔滨医科大学口腔医学院,肝脾外科教育部重点实验室,黑龙江哈尔滨150000

出　　处：《口腔疾病防治》2024年第10期756-764,共9页Journal of Prevention and Treatment for Stomatological Diseases

基　　金：黑龙江省博士后科研启动金(LBH-Q11033)。

摘　　要：目的 探讨正畸牙移动过程中Piezo1通道对张力侧血管生成及成骨改建的影响,为加速正畸牙周组织改建提供实验依据。方法 本实验已获得单位实验动物伦理委员会批准。选取60只健康雄性SD大鼠以上颌双侧中切牙为支抗,使用镍钛拉簧施加0.5 N力近中移动大鼠上颌右侧第一磨牙构建正畸牙齿移动模型,随机分成3组,每组20只,加力后0、8 d时在右侧上颌第一磨牙颊、腭侧黏膜下分别注射等量生理盐水(对照组)、100μmol/L Piezo1通道激动剂(Yoda1组)、48μmol/L Piezo1通道抑制剂(GsMTx4组),分别在第1、3、7、14天测量牙齿移动距离并每组各处死5只大鼠,获取上颌组织标本。通过HE染色观察张力侧牙周组织病理生理变化,免疫组化染色标记张力侧血小板内皮细胞黏附分子(platelet endothelial cell adhesion molecule-1,PECAM-1/CD31)阳性细胞计数以进行微血管定量,检测张力侧骨钙素(osteocalcin,OCN)的表达情况。结果牙齿移动距离测量结果显示,Yoda1组第3、7、14天牙齿移动距离分别为(0.238±0.008)mm、(0.406±0.011)mm、(0.746±0.013)mm,与对照组相比显著增加(P<0.05);GsMTx4组第7、14天牙齿移动距离分别为(0.282±0.011)mm、(0.578±0.008)mm,与对照组相比显著减少(P<0.05)。HE染色结果显示,3组张力侧牙周膜间隙随加力时间增加逐渐增宽,其中对照组及Yoda1组加力第7天时可见成骨细胞,第14天时随后牙周膜间隙逐渐恢复到正常。CD31阳性细胞计数微血管定量分析结果显示,与对照组相比,Yoda1组第3天(8.027±0.225)、第7天(14.320±0.471)血管数量显著增多(P<0.05),在第7天达到峰值,随后逐渐下降;GsMTx4组加力第3天(6.013±0.177)、第7天(9.187±0.678)、第14天(12.613±0.334)张力侧牙周膜内血管数量增加显著减少(P<0.05)。免疫组化结果显示,与对照组相比,Yoda1组加力后各时间点OCN表达显著增强(P<0.05),GsMTx4组加力第7天、第14天的OCN表达减弱(P<0.05)。结�Objective To investigate the effect of the Piezo1 channel on tension-side angiogenesis and osteogenic remodeling during orthodontic tooth movement,so as to provide an experimental basis for accelerating orthodontic periodontal tissue remodeling.Methods This study was approved by the Animal Ethics Committee.Sixty healthy male Sprague-Dawley rats with bilateral maxillary incisors as the anchorage were selected,and nickel titanium tension springs were used to apply 0.5 N of force to the right maxillary first molar of the rats and construct an orthodontic tooth movement model.The rats were randomly divided into three groups(n=20 per group).On Days 0 and 8 of force application,equal volumes of saline(control group),100μmol/L Piezo1 channel agonist(Yoda1 group),and 48μmol/L Piezo1 channel inhibitor(GsMTx4 group)were injected into the buccal and palatal submucosa of the right maxillary first molar.Tooth movement distances were recorded on Days 1,3,7,and 14.Five rats from each group were sacrificed at each time point to obtain maxillary tissue samples.Hematoxylin and eosin(HE)staining was performed to observe the histophysiological changes in the tension-side periodontal tissues.Immunohistochemical staining was used to mark and count CD31-positive cells(microvascular quantification)and to detect the expression of osteocalcin(OCN)in the tension side.Results Measurements of tooth movement distance showed that the Yoda1 group exhibited significantly increased tooth movement distances on Days 3,7,and 14(0.238±0.008 mm,0.406±0.011 mm,and 0.746±0.013 mm,respectively)compared to the control group(P<0.05).In contrast,the GsMTx4 group showed significantly reduced tooth movement distances on Day 7(0.282±0.011 mm)and Day 14(0.578±0.008 mm)compared to the control group(P<0.05).HE staining results indicated that the periodontal ligament space on the tension side gradually widened with the duration of force application and then gradually returned to normal,with visible osteoblasts.Quantitative analysis of CD31-positive cells(mi

关 键 词：正畸牙移动 Pizeo1通道 血管生成 CD31 骨钙素 成骨改建 Yoda1 GsMTx4 

分 类 号：R78[医药卫生—口腔医学]