中国组织工程研究 ›› 2020, Vol. 24 ›› Issue (20): 3174-3179.doi: 10.3969/j.issn.2095-4344.2696

• 肌肉肌腱韧带组织构建 tissue construction of the muscle, tendon and ligament • 上一篇    下一篇

腱止点过度使用性损伤形成过程中细胞外基质的调节机制

陈晓蓝1,梁孝天1,2,张  宁1,刘海涛1,3,曲  艺1,王  博1,王  琳1   

  1. 1北京体育大学,北京市  100084;2浙江警察学院,浙江省杭州市  310051;3河南大学,河南省开封市  475000
  • 收稿日期:2019-11-05 修回日期:2019-11-14 接受日期:2019-12-19 出版日期:2020-07-18 发布日期:2020-04-13
  • 通讯作者: 王琳,博士,博士生导师,教授,北京体育大学,北京市 100084
  • 作者简介:陈晓蓝,女,1990年生,安徽省无为县人,汉族,北京体育大学在读博士,主要从事运动医学方面的研究。
  • 基金资助:
    国家留学基金(国家建设高水平大学公派研究生项目,留金发[2018]3101);中央高校基本科研基金(2015ZD003)

Regulatory mechanism of the extracellular matrix during the development of bone-tendon junction overuse injury

Chen Xiaolan1, Liang Xiaotian1, 2, Zhang Ning1, Liu Haitao1, 3, Qu Yi1, Wang Bo1, Wang Lin1   

  1. 1Beijing Sport University, Beijing 100084, China; 2Zhejiang Police College, Hangzhou 310051, Zhejiang Province, China; 3Henan University, Kaifeng 475000, Henan Province, China

  • Received:2019-11-05 Revised:2019-11-14 Accepted:2019-12-19 Online:2020-07-18 Published:2020-04-13
  • Contact: Wang Lin, PhD, Doctoral supervisor, Professor, Beijing Sport University, Beijing 100084, China
  • About author:Chen Xiaolan, PhD candidate, Beijing Sport University, Beijing 100084, China
  • Supported by:
    the National Construction of High-Level University Public Graduate Project, No. [2018]3101; the Fundamental Research Funds for the Central Universities, No. 2015ZD003

摘要:

文题释义:

腱止点:指肌腱附着于骨的附丽部位,又称骨腱结合部。

过度使用性损伤:用次最大负荷反复刺激骨骼肌肉系统,且休息时间不足以使骨骼肌肉系统的结构产生适应,则会发生过度使用性损伤。

背景:过度使用性腱病多发,但目前还没有理想的治疗手段,这是由于腱病的发生机制尚不清楚。

目的:拟通过髌骨髌腱结合部过度使用性损伤模型,探讨负荷积累过程中,影响胶原合成的酶对胶原Ⅰ、胶原Ⅲ代谢的影响。

方法:32只雌性成年新西兰大白兔随机分为跳跃组(n=16)和对照组(n=16)。跳跃组分别进行2,4,6,8周跳跃训练、150次/d,5 d/周,建立兔髌骨髌腱结合部过度使用性损伤模型;对照组为空白对照。2组兔分别在跳跃组训练2,4,6,8周的最后一次训练结束后24 h,进行双侧髌骨髌腱复合体取样。通过免疫组织化学测定基质金属蛋白酶1、组织金属蛋白酶抑制剂(TIMP1)、胶原Ⅰ、Ⅲ的时序性变化。实验方案经北京体育大学动物实验伦理委员会批准(批准号BSU2015022)。

结果与结论:①基质金属蛋白酶1的活性在训练前6周均显著低于对照组,TIMP1的活性在训练4-8周均显著高于对照组,TIMP1/MMP1在4-8周的训练中均显著高于对照组;②训练的前6周胶原Ⅰ的表达均显著高于对照组;训练8周后胶原Ⅲ的表达显著低于对照组;③结果说明,髌骨髌腱结合部在跳跃负荷积累过程中主要通过增加胶原Ⅰ的表达应对负荷刺激。在负荷积累前2周主要通过抑制基质金属蛋白酶1的活性,增加胶原Ⅰ的表达;负荷积累4-6周主要通过上调TIMP1的活性,抑制基质金属蛋白酶1的活性,增加胶原Ⅰ的表达;负荷积累8周后,TIMP1促进胶原合成的作用不足以拮抗基质金属蛋白酶1降解胶原Ⅰ、Ⅲ的作用,胶原Ⅰ的表达从训练6周后的峰值水平下降到对照组水平,胶原Ⅲ降到低于对照组水平。

ORCID: 0000-0001-6541-558X(陈晓蓝)

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程

关键词: 腱病, 过度使用性损伤, 细胞外基质, 基质金属蛋白酶, 组织金属蛋白酶抑制剂

Abstract:

BACKGROUND: Overuse tendinopathy is a common disease with no ideal treatment because the pathogenesis of tendinopathy is still unclear.

OBJECTIVE: To explore the effects of enzymes affecting collagen synthesis on the metabolism of collagen I and collagen III during load accumulation in a model of patella-patellar tendon junction overuse injury.

METHODS: Thirty-two adult female New Zealand white rabbits were randomly divided into a jumping group (n=16) and a control group (n=16). In the jump group, rabbits were subjected to jump training for 2, 4, 6, and 8 weeks, 150 jumps per day, 5 days per week. No intervention was performed in the control group. Bilateral patella-patellar tendon junction samples were taken at 24 hours after 2-, 4-, 6-, and 8- week training. The time-series changes of matrix metalloproteinase 1 (MMP1), tissue inhibitor of metalloproteinase 1 (TIMP1), collagen I, and collagen III were measured by immunohistochemistry. The study was performed with an ethic approval from the Animal Ethical Committee of Beijing Sport University, China (approval No. BSU2015022).

RESULTS AND CONCLUSION: Compared with the control group, the MMP1 activity was significantly lower within the first 6 weeks of training, TIMP1 activity was significantly higher at 4-8 weeks of training, and TIMP1/MMP1 was significantly higher at 4-8 weeks of training. Compared with the control group, the expression of collagen I was significantly increased in the first 6 weeks of training, but the expression of collagen III was significantly lowered after 8 weeks of training. TIMP1 activity was significantly positively correlated with collagen I expression, and MMP1 activity was significantly negatively correlated with collagen I expression. To conclude, the patella-patellar tendon junction, during jumping load accumulation, mainly responded to load stimulation by increasing collagen I expression. In the first 2 weeks of load accumulation, the expression of collagen I was mainly increased by inhibiting MMP1 activity; in the period of 4 to 6 weeks of load accumulation, the expression of collagen I was mainly increased by increasing the activity of TIMP1 and inhibiting the activity of MMP1; and after 8 weeks of load accumulation, TIMP1 could promote collagen synthesis but with inability to antagonize the degradation of collagen I and III by MMP1. Then the expression of collagen I decreased from the peak level after 6 weeks of training to the control group level, and the level of collagen III decreased to be less than the level of the control group.

Key words: tendinopathy, overuse injury, extracellular matrix, matrix metalloproteinase, tissue inhibitor of metalloproteinase

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