Mechanical stretching enhances TGF-β3 and CREB expression to reduce tendon adhesion during tendon healing in rats

Shuaifeng LI; Hongjiu QIU; Chuanjiang XIE; Shiliang LIAO; Yan XIONG

doi:10.16016/j.1000-5404.201904133

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Mechanical stretching enhances TGF-β3 and CREB expression to reduce tendon adhesion during tendon healing in rats

Basic Medicine | 更新时间：2026-01-09

- Mechanical stretching enhances TGF-β3 and CREB expression to reduce tendon adhesion during tendon healing in rats
- Journal of Third Military Medical University Vol. 41, Issue 18, Pages: 1750-1757(2019)
- 作者机构：
  
  400042 重庆，陆军军医大学(第三军医大学)大坪医院骨科
- 作者简介：
- 基金信息：
  
  the General Program of National Natural Science Foundation of China(81772330)
- DOI：10.16016/j.1000-5404.201904133
  CLC： R-332;R454.4;R686
- Received：17 April 2019，
  
  Revised：2019-06-23，
  
  Published：30 September 2019
- 稿件说明：
移动端阅览
Shuaifeng LI, Hongjiu QIU, Chuanjiang XIE, et al. Mechanical stretching enhances TGF-β3 and CREB expression to reduce tendon adhesion during tendon healing in rats[J]. Journal of Third Military Medical University, 2019, 41(18): 1750-1757.
DOI：

Shuaifeng LI, Hongjiu QIU, Chuanjiang XIE, et al. Mechanical stretching enhances TGF-β3 and CREB expression to reduce tendon adhesion during tendon healing in rats[J]. Journal of Third Military Medical University, 2019, 41(18): 1750-1757. DOI： 10.16016/j.1000-5404.201904133.

摘要

目的

观察机械牵伸促大鼠肌腱愈合、抗肌腱粘连的作用，并探讨其对转化生长因子-β3(transforming growth factor-β3，TGF-β3)/环磷酸腺苷应答元件结合蛋白(cAMP response element binding protein

CREB)信号通路的影响。

方法

SD大鼠18只，双侧后趾建立屈趾肌腱损伤修复模型，按随机数字表法分为3组，每组6只。牵伸组术后予以持续1周的被动机械牵伸，损伤组术后不予以牵引，假手术组仅在手术中暴露肌腱，不损伤肌腱即关闭伤口。术后第1、2、4、8周通过解剖学观察、组织学检查、实时荧光定量PCR反应和免疫组化观察肌腱愈合情况和目的基因的表达水平。

结果

各时间点牵伸组肌腱较损伤组瘢痕粘连程度减轻，肉芽组织生成减少，细胞排列更加有序(

0.05)。愈合过程中牵伸组TGF-β3与CREB的mRNA水平在各时间点均显著高于损伤组，TGF-β1 mRNA的表达在术后早期(术后1周内)较损伤组明显降低(

0.05)，1周后2组差异无统计学意义。免疫组化染色结果提示牵伸组术后TGF-β3与CREB阳性表达强于损伤组，而TGF-β1阳性表达在术后1周时降低，差异具有统计学意义(

0.05)。

结论

机械牵伸可促进屈趾肌腱愈合并减少术后粘连，与TGF-β3和CREB表达的增加及TGF-β1表达的降低密切相关。

Abstract

Objective

To evaluate the effect of mechanical stretching in promoting tendon healing and reducing tendon adhesion during the healing of extensor flexor tendon in rats and its effects on the expression of transforming growth factor-β3 (TGF-β3) and cyclic AMP response element-binding protein (CREB).

Methods

Eighteen male SD rats were randomized into 3 equal groups and subjected to sham operation

flexor tendon injury of the second to fifth digits of the hind limbs without interventions (model group)

or flexor tendon injury with daily passive mechanical stretching of the tendon for 1 week after the operation. The tendon was exposed only without injuries in the sham-operated group. At 1

and 8 weeks after the operation

tendon healing of the rats was evaluated by anatomical observation and histological examination

and the expression of TGF-β1

TGF-β3 and CREB in the tendon was detected using real-time fluorescence quantitative PCR and immunohistochemistry.

Results

Compared with the model group

the rats in mechanical stretching group showed better tendon healing with reduced tendon adhesion

less granular tissue and more regular cell alignment in the tendon (

0.05). During tendon healing

the expression of TGF-β3 and CREB mRNAs in the injured tendon were significantly higher at all the time points and the expression of TGF-β1 mRNA at the first week after the operation was significantly lower in mechanical stretching group than in the model group (

0.05); TGF-β1 mRNA expression was comparable between the two groups at all the later time points. Immunohistochemical studies showed significantly stronger TGF-β3 and CREB expression in the injured tendons in the mechanical stretching group after the operation

and TGF-β1 expression began to decrease significantly at 1 week after the operation (

0.05).

Conclusion

Mechanical stretching can promote the healing of the flexor tendon and reduce postoperative tendon adhesion in close relation with increased expression of TGF-β3 and CREB and reduced expression of TGF-β1 in the early stage of tendon healing.

关键词

Keywords

references

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