中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (31): 4950-4955.doi: 10.12307/2021.135

• 骨髓干细胞 bone marrow stem cells • 上一篇    下一篇

低强度脉冲超声介导骨髓间充质干细胞促进膝骨关节炎软骨修复

廖  晴,李保建,李  洋,徐泰祥,曾  静,张珍珍,刘  刚   

  1. 南方医科大学第三附属医院康复医学科,广东省广州市  510630
  • 收稿日期:2020-08-19 修回日期:2020-08-21 接受日期:2020-09-26 出版日期:2021-11-08 发布日期:2021-04-25
  • 通讯作者: 刘刚,博士,主任医师,南方医科大学第三附属医院康复医学科,广东省广州市 510630
  • 作者简介:廖晴,女,1992年生,湖南省常宁市人,汉族,南方医科大学在读硕士,主要从事干细胞相关研究。
  • 基金资助:
    国家自然科学基金(81774382),项目负责人:刘刚

Low-intensity pulsed ultrasound mediates bone marrow mesenchymal stem cells to promote osteoarthritis cartilage repair

Liao Qing, Li Baojian, Li Yang, Xu Taixiang, Zeng Jing, Zhang Zhenzhen, Liu Gang   

  1. Department of Rehabilitation Medicine, Third Hospital of Southern Medical University, Guangzhou 510630, Guangdong Province, China
  • Received:2020-08-19 Revised:2020-08-21 Accepted:2020-09-26 Online:2021-11-08 Published:2021-04-25
  • Contact: Liu Gang, MD, Chief physician, Department of Rehabilitation Medicine, Third Hospital of Southern Medical University, Guangzhou 510630, Guangdong Province, China
  • About author:Liao Qing, Master candidate, Department of Rehabilitation Medicine, Third Hospital of Southern Medical University, Guangzhou 510630, Guangdong Province, China
  • Supported by:
    the National Natural Science Foundation of China, No. 81774382 (to LG)

摘要:

文题释义
低强度脉冲超声:是一种频率超过人耳听阈(20 kHz)以上,强度为1-100 mW/cm2的声波,不仅可以提高骨髓间充质干细胞的分化、增殖及趋化归巢能力,还能调节损伤部位的微环境以吸引骨髓间充质干细胞的归巢,改善骨髓间充质干细胞的移植效果;同时也能显著促进对力学敏感的骨与软骨组织再生,已被FDA批准作为加速骨折愈合的治疗手段。膝骨关节炎的重要特征是软骨破坏,因此治疗的关键是关节软骨的修复,低强度脉冲超声具有软骨保护作用,可促进软骨修复。

Sox9:主要表达于软骨细胞中,可促进软骨细胞存活并调节软骨细胞表型,转录激活许多软骨特异性基因。Sox9是成人软骨发育和维持的关键转录因子,参与软骨细胞分化的每个阶段,是软骨形成所必需的。
背景:研究表明骨髓间充质干细胞及低强度脉冲超声均能促进膝骨关节炎软骨修复,但目前尚未有报道低强度脉冲超声介导骨髓间充质干细胞对膝骨关节炎软骨是否能有更好的修复效果。
目的:观察低强度脉冲超声介导骨髓充质干细胞对膝骨关节炎软骨的修复效果。
方法:将36只6周龄SD雄性大鼠随机分为 4组,分别为对照组、骨关节炎组、干细胞组、干细胞+超声组,每组9只,后3组采用右侧膝关节前交叉韧带横断+内侧半月板部分切除的方法制备骨关节炎模型。造模后6周,对照组及骨关节炎组大鼠不予以特殊处理;干细胞组、干细胞+超声组大鼠膝关节腔内均注射骨髓间充质干细胞悬液0.1 mL(细胞浓度为1×109 L-1),1次/周,治疗4周,同时干细胞+超声组给予低强度脉冲超声治疗,20 min/d,治疗4周。采用Western blot检测大鼠关节软骨Ⅱ型胶原、Sox9蛋白的表达,同时用Mankin评分评估各组大鼠的软骨退变程度。
结果与结论:①治疗4周后,相对于其他3组,骨关节炎组Ⅱ型胶原、Sox9蛋白表达减少(P < 0.05);干细胞组Ⅱ型胶原、Sox9蛋白表达低于干细胞+超声组(P < 0.05);②对照组、干细胞组与干细胞+超声组的Mankin评分均明显低于骨关节炎组(P < 0.01);与干细胞组相比,干细胞+超声组Mankin评分降低(P < 0.05);③结果表明,相对于单纯应用骨髓间充质干细胞,低强度脉冲超声介导骨髓间充质干细胞促进膝骨关节炎软骨修复的效果更优。
https://orcid.org/0000-0002-7227-2676(廖晴) 

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

关键词: 干细胞, 骨髓间充质干细胞, 低强度脉冲超声, 骨关节炎, 膝, 软骨, 修复

Abstract: BACKGROUND: Studies have shown that bone marrow mesenchymal stem cells and low-intensity pulsed ultrasound can promote the repair of knee osteoarthritis cartilage, but there is no report whether low-intensity pulsed ultrasound-mediated bone marrow mesenchymal stem cells can have a better effect on knee osteoarthritis cartilage repair.

OBJECTIVE: To observe the repair effect of bone marrow mesenchymal stem cells mediated by low-intensity pulsed ultrasound on knee osteoarthritis cartilage.
METHODS:  Totally 36 Sprague-Dawley male rats aged 6 weeks were randomly divided into four groups: control group, osteoarthritis group, stem cell group and stem cell plus ultrasound group (n=9 per group). In the osteoarthritis group, stem cell group and stem cell plus ultrasound group, osteoarthritis models were made by the anterior cruciate ligament transection of the right knee joint with partial resection of the medial meniscus. At 6 weeks after model establishment, no special treatment was given to the control group and the osteoarthritis group. In the stem cell group and the stem cell plus ultrasound group, the knee joint cavity was injected with bone marrow mesenchymal stem cells 0.1 mL (cell concentration was 1×109 L-1), once a week, for 4 weeks. Simultaneously, rats in the stem cells plus ultrasound group were treated with low-intensity pulsed ultrasound at 20 minutes/day for 4 weeks. Western blot assay was used to detect the expression of type II collagen and Sox9 protein in rat articular cartilage, and Mankin score was used to evaluate the degree of cartilage degeneration in each group of experimental rats. 
RESULTS AND CONCLUSION: (1) After 4 weeks of treatment, the expression of type II collagen and Sox9 protein in the osteoarthritis group was reduced compared to the other three groups (P < 0.05). The protein expression of type II collagen and Sox9 in the stem cell group was lower than that of stem cells plus ultrasound group (P < 0.05). (2) The Mankin scores of control group, stem cell group and stem cell plus ultrasound group were significantly lower than those of the osteoarthritis group (P < 0.01). Compared with the stem cell group, the Mankin score of the stem cell plus ultrasound group was lower (P < 0.05). (3) The results show that compared with simple bone marrow mesenchymal stem cells, low-intensity pulsed ultrasound-mediated bone marrow mesenchymal stem cells have a better effect on cartilage repair in knee osteoarthritis.

Key words: stem cells, bone marrow mesenchymal stem cells, low-intensity pulsed ultrasound, osteoarthritis, knee, cartilage, repair

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