中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (19): 2972-2979.doi: 10.3969/j.issn.2095-4344.1242

• 软骨组织构建 cartilage tissue construction • 上一篇    下一篇

关节牵伸高度对膝骨关节炎模型兔软骨修复的影响

石华南,张永红,彭瑞健,李晓辉,郭秀娟   

  1. (山西医科大学第二医院骨科,山西省太原市  030001)
  • 收稿日期:2019-01-30 出版日期:2019-07-08 发布日期:2019-07-08
  • 通讯作者: 张永红,博士,主任医师,博士生导师,山西医科大学第二医院骨科,山西省太原市 030001
  • 作者简介:石华南,男,1991年生,河南省洛阳市人,汉族,山西医科大学第二医院骨科在读硕士,主要从事牵拉组织再生研究。
  • 基金资助:

    山西省回国留学人员科研资助项目(2015-104)

Influence of joint distraction height on cartilage repair in rabbit models of knee oteoarthritis

Shi Huanan, Zhang Yonghong, Peng Ruijian, Li Xiaohui, Guo Xiujuan   

  1.  (Department of Orthopedics, the Second Hospital of Shanxi Medical University, Taiyuan 030001, Shanxi Province, China)
  • Received:2019-01-30 Online:2019-07-08 Published:2019-07-08
  • Contact: Zhang Yonghong, MD, Chief physician, Doctoral supervisor, Department of Orthopedics, the Second Hospital of Shanxi Medical University, Taiyuan 030001, Shanxi Province, China
  • About author:Shi Huanan, Master candidate, Department of Orthopedics, the Second Hospital of Shanxi Medical University, Taiyuan 030001, Shanxi Province, China
  • Supported by:

    the Research Project of Shanxi Provincial Overseas Scholarship, No. 2015-104

摘要:

文章快速阅读:

文题释义:
关节牵伸:是通过使用外固定架对关节进行牵伸,使关节达到去负荷的一项技术。关节牵伸技术应用于膝骨关节炎,目的是减轻关节软骨的机械应力,防止进一步的磨损和撕裂,进而刺激软骨细胞开启软骨组织修复;并且关节牵伸铰链允许活动,行走过程中关节液压力的变化可以改善软骨细胞营养,进一步促进软骨组织的修复。
基质金属蛋白酶:其家族成员具有相似的结构,一般由5个功能不同的结构域组成:疏水信号肽序列;前肽区,主要作用是保持酶原的稳定。当该区域被外源性酶切断后,基质金属蛋白酶原被激活;催化活性区,有锌离子结合位点,对酶催化作用的发挥至关重要;富含脯氨酸的铰链区;羧基末端区,与酶的底物特异性有关,其中酶催化活性区和前肽区具有高度保守性。各种基质金属蛋白酶间具有一定的底物特异性,但不是绝对的。同一种基质金属蛋白酶可降解多种细胞外基质成分,而某一种细胞外基质成分又可被多种基质金属蛋白酶降解,但不同酶的降解效率可不同。
摘要
背景
:有研究证实关节牵伸可激活软骨细胞再生,此项技术已逐步应用于骨关节炎的治疗过程中。但该技术的相关基础研究相对薄弱,尤其是不同牵伸高度对软骨修复的影响报道较少。
目的:探讨关节牵伸治疗兔膝骨关节炎中不同牵伸高度对软骨修复的影响。
方法:将五六月龄新西兰大白兔(山西医科大学实验动物中心提供)随机分为造模组及空白对照组。造模组采用关节腔注射体积分数4%木瓜蛋白酶的方法制备兔膝骨关节炎模型,空白对照组关节腔注射生理盐水。随后将造模组兔随机分成模型组、正常关节间隙牵伸组、1.5倍正常关节间隙牵伸组及2.0倍正常关节间隙牵伸组。后3组安置Ilizarov 3/4环形外固定架进行关节牵伸,空白对照组、模型对照组不做特殊处理。牵伸6周后,取材观察各组软骨修复情况,采用ICRS软骨修复大体评分、Mankin骨关节病组织评分、免疫组织化学染色观察软骨组织中白细胞介素1β、基质金属蛋白酶13的表达情况。
结果与结论:①空白对照组软骨平滑完整;模型组软骨破坏明显,可见软骨缺损;正常关节间隙牵伸组缺损区可见软骨再生,未完全填充缺损区;1.5倍正常关节间隙牵伸组再生软骨完全填充,组织学观察为透明软骨;2.0倍正常关节间隙牵伸组再生软骨完全填充缺损区,组织学观察为透明软骨。各牵伸组ICRS评分显著高于模型组,Mankin评分显著低于模型对照组(P < 0.001),其中正常关节间隙牵伸组与1.5倍和2.0倍正常关节间隙牵伸组的差异有显著性意义(P < 0.001);②各牵伸组软骨组织白细胞介素1β、基质金属蛋白酶13的表达显著低于模型组(P < 0.001),其中正常关节间隙牵伸组的表达显著高于1.5倍和2.0倍正常关节间隙牵伸组(P < 0.001);③结果提示,1.5倍和2.0倍正常关节间隙牵伸较正常关节间隙牵伸可以更好地实现软骨再生。

 

关键词: 关节牵伸, 软骨组织再生, 牵伸高度, Ilizarov技术, 软骨修复, 膝骨关节炎, 机械应力, 骨缺损

Abstract:

BACKGROUND: Joints distraction has been shown to activate cartilage cell regeneration, which has been gradually used in the treatment of osteoarthritis. However, the related basic research of this technology is weak. Especially the influence of different joint distraction height on cartilage repair is little known.
OBJECTIVE: To explore the influence of different joint distraction height on cartilage repair in rabbit knee osteoarthritis.
METHODS: New Zealand white rabbits, aged 5-6 months (provided by Experimental Animal Center of Shanxi Medical University) were randomized into mode and blank control groups. A model of rabbit knee osteoarthritis was made by intra-articular injection of 4% papain. The blank control group underwent intra-articular injection of normal saline. Afterwards, the rabbit models were randomized into modeling, normal joint space distraction, 1.5×joint space distraction and 2.0×joint space distraction groups. The rabbits in the latter three groups, the joint distraction was carried out by placing Ilizarov External Fixator(3/4). The blank control and modeling groups received no treatment. At 6 weeks after surgery, animals of each group were sacrificed for gross observation and macroscopically analyzed using ICRS system and Mankin scoring system. The expression levels of interleukin 1β and matrix metalloproteinase 13 in cartilage tissue were detected by immunohistochemical staining.
RESULTS AND CONCLUSION: (1) The articular cartilage in the blank control group was smooth and intact. In the modeling group, the defect of articular cartilage was obvious. The defect area in the normal joint space distraction group showed cartilage regeneration, but did not completely fill the defect area. In the 1.5×joint space distraction group, the regenerated cartilage was completely filled the defect area, and histological observation showed transparent cartilage. The regenerated cartilage the 2.0×joint space distraction group was completely filled in the defect area, and histological observation showed transparent cartilage. The ICRS score and Mankin score in each distraction group were significantly higher than those in the modeling group (P < 0.001), and the scores in the 1.5× and 2.0×joint space distraction groups were significantly higher than those in the normal joint space distraction group (P < 0.001). (2) The expression levels of interleukin 1β and matrix metalloproteinase 13 in cartilage tissue in each distraction group were significantly lower than those in the modeling group (P < 0.01), and the levels in the 1.5×and 2.0×joint space distraction groups were significantly lower than those in the normal joint space distraction group (P < 0.001). (3) In summary, the regeneration of cartilage can be better achieved by 1.5× and 2.0×joint space distraction groups than the normal joint space distraction.

 

Key words: joint distraction, cartilage tissue regeneration, joint distraction height, Ilizarov technology, cartilage repair, knee osteoarthritis, mechanical stress, bone defects

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