吉林大学学报(医学版) ›› 2020, Vol. 46 ›› Issue (6): 1221-1226.doi: 10.13481/j.1671-587x.20200618

• 基础研究 • 上一篇    下一篇

骨保护素对大鼠正畸牙齿移动过程中破骨细胞分化和p38-MAPK信号通路的影响

娄颖,马欣()   

  1. 河南省人民医院口腔正畸科,河南 郑州 450001
  • 收稿日期:2020-02-25 出版日期:2020-11-28 发布日期:2022-08-24
  • 通讯作者: 马欣 E-mail:yinglouyl00@163.com
  • 作者简介:娄 颖(1989-),女,河南省濮阳市人,主治医师,医学硕士,主要从事口腔正畸方面的研究。
  • 基金资助:
    河南省科技厅科学计划项目资助课题(142300410371)

Effects of osteoprotectin on osteoclast differentiation and p38-MAPK signaling pathway during orthodontic tooth movement in rats

Ying LOU,Xin MA()   

  1. Department of Orthodontics,Henan People’s Hospital,Zhengzhou 450001,China
  • Received:2020-02-25 Online:2020-11-28 Published:2022-08-24
  • Contact: Xin MA E-mail:yinglouyl00@163.com

摘要: 目的

研究骨保护素对大鼠正畸牙齿移动过程中破骨细胞分化和p38-丝裂原活化蛋白激酶(p38-MAPK)信号通路的影响,探讨骨保护素在正畸治疗中抑制牙齿移动的可能机制。

方法

将128只大鼠随机分为对照组和骨保护素组,每组64只。于开始建模前3 d,骨保护素组大鼠于左上颌第一磨牙鄂侧黏骨膜下注射重组人骨保护素(0.05 mg·kg-1),对照组大鼠在相同部位注射等量生理盐水。采用弹簧牵引法建立正畸大鼠模型。检测加力1、2、3和4周时2组大鼠第一磨牙移动距离,抗酒石酸酸性磷酸酶(TRAP)染色检测2组大鼠牙周组织中破骨细胞数,免疫组织化学染色法检测2组大鼠压力侧牙周组织中p-p38表达水平,Western blotting法检测2组大鼠牙周组织中核因子κB受体活化因子(RANK)和基质金属蛋白酶9(MMP-9)蛋白表达水平。

结果

加力1周时,2组大鼠牙齿移动距离、破骨细胞数和p-p38 表达水平与对照组比较差异无统计学意义(P>0.05);加力2、3和4周时,骨保护素组大鼠牙齿移动距离、破骨细胞数和p-p38 表达水平小于对照组(P<0.05或P<0.01);骨保护素组大鼠牙槽骨组织中RANK和MMP-9蛋白表达水平低于对照组(P<0.01)。牙周组织中破骨细胞数(r=0.654)、RANK(r=0.576)和MMP-9(r=0.583)蛋白表达水平与p-p38蛋白表达水平均呈正相关关系(P<0.05)。

结论

骨保护素可抑制大鼠正畸牙齿移动过程中破骨细胞生成和分化、抑制p38 MAPK信号通路激活,从而抑制正畸牙齿移动,发挥增强支抗作用。

关键词: 骨保护素, 正畸治疗, 牙移动, 破骨细胞, p38 丝裂原活化蛋白激酶

Abstract: Objective

To study the effects of osteoprotein on the osteoclast differentiation and p38-mitogen-activated protein kinase (p38-MAPK) signal pathway during the orthodontic tooth movement in the rats,and to explore the possible mechanism of osteoprotein in inhibiting the tooth movement during orthodontic treatment.

Methods

A total of 128 rats were randomly divided into control group and osteoprotectin group, and there were 64 rats in each group.Three days before modeling, the rats in osteoprotectin group were injected with recombinant human osteoprotectin (0.05 mg·kg-1) submucosally on the left maxillary first molar,and the rats in control group were injected with the same amount of saline at the same site.The orthodontic models of rats were established by spring traction method.The moving distances of first molar of the rats at the 1st week,the 2nd week,the 3rd week, and the 4th week after stressing were measured.Tartrate-resistant acid phosphatase (TRAP) staining was used to determine the number of osteoclasts of the rats in two groups;immunohistochemical staining was used to determine the expression level of p-p38 on the pressure side of periodontal tissue of the rats in two groups;Western blotting method was used to determine the expression levels of receptor activators nuclear factor kappa B (RANK) and matrix metalloproteinase-9 (MMP-9) proteins in periodontal tissue of the rats in two groups.

Results

There were no significant differences in the tooth movement distances, osteoclast number and p-p38 expression levels of the rats between two groups at the 1st week after stressing; at the 2nd week, the 3rd week, and the 4th week after stressing, the tooth movement distances, osteoclast number and p-p38 expression levels of the rats in osteoprotegein group were lower than those in control group (P<0.05 or P<0.01); the expression levels of RANK and MMP-9 proteins in alveolar bone tissue of the rats in osteoprotegein group were lower than those in control group (P<0.01).The number of osteoclasts(r=0.654), the expression levels of RANK(r=0.576) and MMP-9(r=0.583) proteins in periodontal tissue of the rats were positively correlated with the expression level of p-p38 protein(P<0.05).

Conclusion

Osteoprotectin can inhibit the generation and differentiation of osteoclasts during the orthodontic tooth movement in the rats, and inhibit the activation of p38-MAPK signal pathway, thereby inhibit the orthodontic tooth movement and enhance the anchoring effect.

Key words: osteoprotectin, orthodontic treatment, tooth movement, osteoclasts, p38 mitogen activated protein kinase

中图分类号: 

  • R783.5