中国组织工程研究 ›› 2024, Vol. 28 ›› Issue (19): 3049-3054.doi: 10.12307/2024.157

• 细胞相关实验/试验研究Cell related experimental/trial studies • 上一篇    下一篇

兔肩袖腱骨愈合过程中基质细胞衍生因子1的表达及作用机制

王  旭1,2,吴亚洁1,2,张鑫福1,2,石  志2,3,杨腾云2,4,熊波涵2,4,卢晓君2,4,赵道洪1,2   

  1. 1昆明医科大学第二附属医院骨科,云南省昆明市   650000;2昆明医科大学,云南省昆明市   650500;昆明医科大学第一附属医院,3骨科,4运动医学科,云南省昆明市   650000
  • 收稿日期:2023-03-27 接受日期:2023-05-15 出版日期:2024-07-08 发布日期:2023-09-26
  • 通讯作者: 赵道洪,博士,副主任医师,昆明医科大学第二附属医院骨科,云南省昆明市 650000;昆明医科大学,云南省昆明市 650500
  • 作者简介:王旭,女,1996年生,吉林省辽源市人,汉族,昆明医科大学在读硕士,主要从事骨关节病的临床治疗及腱骨愈合的基础研究。
  • 基金资助:
    国家自然科学基金项目(81960412),项目负责人:赵道洪;云南省科技厅科技计划项目[2019FE001(-065)],项目负责人:赵道洪;云南省卫生健康委员会医学后备人才培养计划(H-2019013),项目负责人:赵道洪;昆明医科大学2023年研究生创新基金项目(2023S091),项目负责人:王旭

Expression and action mechanism of stromal cell-derived factor 1 in tendon-bone healing of rabbit rotator cuff

Wang Xu1, 2, Wu Yajie1, 2, Zhang Xinfu1, 2, Shi Zhi2, 3, Yang Tengyun2, 4, Xiong Bohan2, 4, Lu Xiaojun2, 4, Zhao Daohong1, 2   

  1. 1Department of Orthopedics, Second Affiliated Hospital of Kunming Medical University, Kunming 650000, Yunnan Province, China; 2Kunming Medical University, Kunming 650500, Yunnan Province, China; 3Department of Orthopedics, 4Department of Sports Medicine, First Affiliated Hospital of Kunming Medical University, Kunming 650000, Yunnan Province, China
  • Received:2023-03-27 Accepted:2023-05-15 Online:2024-07-08 Published:2023-09-26
  • Contact: Zhao Daohong, MD, Associate chief physician, Department of Orthopedics, Second Affiliated Hospital of Kunming Medical University, Kunming 650000, Yunnan Province, China; Kunming Medical University, Kunming 650500, Yunnan Province, China
  • About author:Wang Xu, Master candidate, Department of Orthopedics, Second Affiliated Hospital of Kunming Medical University, Kunming 650000, Yunnan Province, China; Kunming Medical University, Kunming 650500, Yunnan Province, China
  • Supported by:
    National Natural Science Foundation of China, No. 81960412 (to ZDH); Science and Technology Plan Project of Yunnan Provincial Department of Science and Technology, No. 2019FE001(-065) (to ZDH); Yunnan Provincial Health Commission Medical Reserve Talent Training Program, No. H-2019013 (to ZDH); 2023 Graduate Innovation Fund Project of Kunming Medical University, No. 2023S091 (to WX)

摘要:


文题释义:

腱骨愈合:腱骨指肌腱组织和骨组织移行连接处,目前腱骨愈合领域研究多集中于膝关节中的前交叉韧带、肩关节中的肩袖、足踝中的跟腱等,理想愈合为纤维软骨组织与骨组织附着处恢复原有的4层结构,即致密纤维结缔组织、未钙化的纤维软骨、钙化的纤维软骨和骨组织。
基质细胞衍生因子1(stroma-cell derived factor-1,SDF-1):又称趋化因子CXCL12,是CXC趋化因子家族的一员,在胚胎发育中可以趋化造血干细胞从胎儿肝脏迁移到骨髓,其主要受体为CXCR4,两者的结合可被AMD3100抑制。


背景:近年在腱骨损伤领域部分学者将基质细胞衍生因子1搭载在组织工程支架上用以促进腱骨愈合,取得了较好的成效,但在基质细胞衍生因子1促进腱骨愈合机制及自然愈合过程中其是否参与修复,目前尚未明确。

目的:研究兔肩袖全层冈上肌断裂后腱骨愈合过程中基质细胞衍生因子1表达,及其在腱骨损伤时对干细胞的迁移作用和最佳体外促迁移浓度。
方法:随机取成年新西兰大白兔18只建立肩袖损伤模型,另取3只为空白对照。于造模后3,5,7,14,21,28 d各处死3只并处死空白组兔,取腱骨连接处组织保存在-80 ℃冰箱。应用ELISA反应检测损伤后各时间点愈合处基质细胞衍生因子1表达。取幼兔股骨骨髓间充质干细胞分离培养鉴定,通过transwell实验验证基质细胞衍生因子1对干细胞的促迁移作用效果及体外促迁移最佳浓度,将培养到P3代的干细胞与Brdu共培养后注入兔耳缘静脉,通过免疫组化染色验证干细胞是否迁移至损伤处。

结果与结论:①基质细胞衍生因子1在肩袖腱骨愈合过程呈双峰表达,于伤后3 d 明显增高(P < 0.01)随后下降,于伤后5 d达最低,后再次升高于伤后14 d 达峰值(P < 0.01),然后下降;②细胞免疫组化染色可见标记有Brdu的干细胞确有迁移至损伤处;③transwell实验结果表明60-80 ng/mL的基质细胞衍生因子1对干细胞促迁移效果最好,而200 ng/mL浓度反而会起到抑制迁移作用;④基质细胞衍生因子1参与了肩袖腱骨愈合的炎症反应期和增殖期的愈合过程,其作用机制可能为通过促进干细胞迁移至损伤处并分化为各类细胞促进修复,并且基质细胞衍生因子1的促迁移作用存在于一定浓度范围,超出范围则可能起到抑制作用。

https://orcid.org/0000-0002-0169-3289 (王旭) 

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: 肩袖大撕裂, 腱骨愈合, 基质细胞衍生因子1, 骨髓间充质干细胞,

Abstract: BACKGROUND: In recent years, some scholars in the field of tendon bone injury have attached stromal cell-derived factor 1 to tissue engineering scaffolds to promote tendon bone healing, and achieved good results. However, whether stromal cell-derived factor 1 promotes tendon bone healing mechanisms and participates in the repair of natural healing has not yet been defined. 
OBJECTIVE: To study the expression of stroma-cell derived factor 1 during tendon bone healing after rupture of the whole supraspinatus muscle of the rabbit rotator cuff and its migration effect and optimal in vitro migration promoting concentration on stem cells during tendon bone injury.
METHODS: Totally 18 adult New Zealand rabbits were randomly selected to establish rotator cuff injury models, and an additional 3 rabbits were selected as blank controls. At 3, 5, 7, 14, 21, and 28 days after modeling, three rabbits were executed separately and the rabbits in the blank group were sacrificed. The tissues of tendon bone junction were taken and stored in a -80 ℃ refrigerator. The expression of stromal cell-derived factor 1 was detected by ELISA at each time point after injury. Mesenchymal stem cells were isolated from the bone marrow of young rabbit femur, cultured, and identified. Transwell assay was performed to verify the migration-promoting effect of stromal cell-derived factor 1 on stem cells and the optimal migration-promoting concentration in vitro. The stem cells cultured to P3 were co-cultured with BrdU and injected into the rabbit ear marginal vein, and immunohistochemical staining was used to verify whether the stem cells migrated to the injury site. 
RESULTS AND CONCLUSION: (1) Stromal cell-derived factor 1 gene expression was bimodal during rotator cuff tendon bone healing. Stromal cell-derived factor 1 gene expression increased significantly at 3 days post-injury (P < 0.01) and then decreased, reaching a minimum at 5 days post-injury. It increased again and reached a peak 14 days after injury (P < 0.01) and then decreased. (2) Cell immunohistochemical staining displayed that stem cells labeled with BrdU did migrate to the injury site. (3) The results of the transwell experiment exhibited that 60-80 ng/mL stromal cell-derived factor 1 had the best effect on promoting migration of stem cells, while a concentration of 200 ng/mL inhibited migration. (4) Stromal cell-derived factor 1 is involved in the healing of rotator cuff tendon bone during the inflammatory response phase and the proliferation phase. The mechanism of action may be to promote the migration of stem cells to the injury and their differentiation into various types of cells to promote repair. In addition, the pro-migration effect of stromal cell-derived factor 1 exists at a range of concentrations, beyond which it may act as an inhibitor.

Key words: large rotator cuff tear, tendon bone healing, stromal cell-derived factor 1, bone marrow mesenchymal stem cell, rabbit

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