中国组织工程研究 ›› 2022, Vol. 26 ›› Issue (16): 2551-2556.doi: 10.12307/2022.256

• 生物材料基础实验 basic experiments of biomaterials • 上一篇    下一篇

局部应用霉酚酸酯抑制成纤维细胞增殖及迁移预防硬膜外纤维化

朱东明1,张  振1,张  杰2,颜连启3   

  1. 1大连医科大学,辽宁省大连市   116044;2中南大学湘雅二医院,湖南省长沙市   410012;3苏北人民医院,江苏省扬州市   225001
  • 收稿日期:2020-09-14 修回日期:2020-09-16 接受日期:2020-10-24 出版日期:2022-06-08 发布日期:2021-12-23
  • 通讯作者: 颜连启,主任医师,硕士生导师,副教授,苏北人民医院关节外科中心,江苏省扬州市 225001
  • 作者简介:朱东明,男,1995年生,安徽省淮南市人,汉族,大连医科大学在读硕士,主要从事骨科疾病的防治和研究。
  • 基金资助:
    江苏省医学创新团队课题(CXTDB2017004),项目参与者:颜连启

Topical application of mycophenolate mofetil prevents epidural fibrosis by inhibiting the proliferation and migration of fibroblasts

Zhu Dongming1, Zhang Zhen1, Zhang Jie2, Yan Lianqi3   

  1. 1Dalian Medical University, Dalian 116044, Liaoning Province, China; 2The Second Xiangya Hospital of Central South University, Changsha 410012, Hunan Province, China; 3Northern Jiangsu People’s Hospital, Yangzhou 225001, Jiangsu Province, China
  • Received:2020-09-14 Revised:2020-09-16 Accepted:2020-10-24 Online:2022-06-08 Published:2021-12-23
  • Contact: Yan Lianqi, Chief physician, Master’s supervisor, Associate professor, Northern Jiangsu People’s Hospital, Yangzhou 225001, Jiangsu Province, China
  • About author:Zhu Dongming, Master candidate, Dalian Medical University, Dalian 116044, Liaoning Province, China
  • Supported by:
    the Jiangsu Provincial Medical Innovation Team, No. CXTDB2017004 (to YLQ)

摘要:

文题释义:
细胞增殖:是生物体的重要生命特征,细胞以分裂的方式进行增殖,单细胞生物以细胞分裂的方式产生新的个体,多细胞生物以细胞分裂的方式产生新的细胞,用来补充体内衰老或死亡的细胞。
细胞迁移:也称为细胞爬行、细胞移动或细胞运动,是指细胞在接收到迁移信号或感受到某些物质的梯度后而产生的移动。细胞迁移为细胞头部伪足的延伸、新的黏附建立、细胞体尾部收缩在时空上的交替过程,是正常细胞的基本功能之一,是机体正常生长发育的生理过程,也是活细胞普遍存在的一种运动形式。

背景:研究发现,椎板切除术后的硬膜外纤维化主要由成纤维细胞增殖及迁移造成,而霉酚酸酯能够抑制成纤维细胞的增殖和迁移。
目的:探讨局部应用霉酚酸酯预防椎板切除术后硬膜外纤维化的作用及其可能机制。
方法:①细胞实验:分别以0,0.01,0.1,1,10,100 μmol/L的霉酚酸酯溶液处理成纤维细胞24 h,采用CCK-8法检测细胞活性,选择较适宜的处理浓度进行后续的细胞实验。分别以0,0.1,1,10 μmol/L的霉酚酸酯溶液处理成纤维细胞24 h,EdU和细胞周期实验检测细胞增殖情况,划痕实验与transwell细胞迁移实验检测细胞迁移能力,Western blot检测细胞增殖相关蛋白(细胞核增殖抗原、Cyclin D1)与迁移相关蛋白(α-微管蛋白、黏着斑蛋白)的表达量。②动物实验:取48只成年SD大鼠,构建大鼠椎板切除模型,随机分4组:对照组将浸透生理盐水的棉片置于术后骨缺损区域,低、中、高浓度组分别将浸透2.5,5,10 g/L霉酚酸酯溶液的棉片置于术后骨缺损区域,术后4周取术区椎体进行组织学分析。
结果与结论:①细胞实验结果:CCK-8检测显示,霉酚酸酯呈浓度依赖性抑制成纤维细胞的活性;EdU实验显示,霉酚酸酯呈浓度依赖性抑制成纤维细胞的增殖;流式细胞仪检测显示,0.1 μmol/L的霉酚酸酯溶液使细胞周期停滞在G0/G1期;划痕实验与transwell实验显示,霉酚酸酯呈浓度依赖性抑制成纤维细胞的迁移能力;Western blot检测显示,霉酚酸酯呈浓度依赖性抑制成纤维细胞增殖相关蛋白与迁移相关蛋白的表达;②动物实验结果:组织学观察显示,随着霉酚酸酯浓度增加,术区纤维化组织中成纤维细胞数量与胶原生成逐渐减少;③结果表明,椎板切除术后局部应用霉酚酸酯可有效预防硬膜外纤维化的发生,可能是通过抑制成纤维细胞的增殖和迁移发挥作用。

https://orcid.org/0000-0001-7346-2167 (朱东明) 

中国组织工程研究杂志出版内容重点:生物材料;骨生物材料口腔生物材料纳米材料缓释材料材料相容性;组织工程

关键词: 材料, 霉酚酸酯, 成纤维细胞, 增殖, 迁移, 硬膜外纤维化, 动物, 小鼠, 实验

Abstract: BACKGROUND: Studies have shown that epidural fibrosis after laminectomy is mainly caused by the proliferation and migration of fibroblasts, and mycophenolate mofetil can inhibit the proliferation and migration of fibroblasts.  
OBJECTIVE: To explore the effect of topical application of mycophenolate mofetil in preventing epidural fibrosis after laminectomy and its possible mechanism.
METHODS:  (1) Cell test: Fibroblasts were separately treated with 0, 0.01, 0.1, 1, 10, and 100 μmol/L mycophenolate mofetil solution for 24 hours. Cell viability was detected by CCK-8 assay, and the appropriate treatment concentration was selected for subsequent cell experiments. Fibroblasts were separately treated with 0, 0.1, 1, 10 μmol/L mycophenolate mofetil solution for 24 hours. EdU assay and cell cycle assay were used to detect cell proliferation. Wound scratch assay and transwell assay were used to detect cell migration. Western blot assay was used to detect the expression of cell proliferation-related proteins (nuclear proliferation antigen, Cyclin D1) and migration-related proteins (α-tubulin, vinculin). (2) Animal test: Forty-eight adult SD rats were selected to construct rat laminectomy model and randomly divided into four groups. In the control group, cotton pads soaked with normal saline were placed on the postoperative bone defect area. In the low, medium, and high concentration groups, cotton pads soaked with 2.5, 5, and 10 g/L mycophenolate mofetil solution were placed on the postoperative bone defect area. Four weeks after the operation, the vertebral body of the operative area was taken for histological analysis.  
RESULTS AND CONCLUSION: (1) Cell test results: CCK-8 assay showed that mycophenolate mofetil inhibited the viability of fibroblasts in a concentration-dependent manner. EdU assay showed that mycophenolate mofetil inhibited the proliferation of fibroblasts in a concentration-dependent manner. Flow cytometry showed that 0.1 μmol/L mycophenolate mofetil solution blocked the cell cycle in G0/G1 phase. Wound scratch assay and transwell assay showed that mycophenolate mofetil inhibited the migration of fibroblasts in a concentration-dependent manner. Western blot assay showed that mycophenolate mofetil inhibited the expression of fibroblast proliferation-related protein and migration-related protein in a concentration-dependent manner. (2) Animal test results: Histological observation showed that with the increase of mycophenolate mofetil concentration, the number of fibroblasts and collagen production in the fibrotic tissue of the surgical area gradually decreased. (3) The results showed that the topical application of mycophenolate mofetil after laminectomy can effectively prevent the occurrence of epidural fibrosis, possibly by inhibiting the proliferation and migration of fibroblasts.

Key words: material, mycophenolate mofetil, fibroblast, proliferation, migration, epidural fibrosis, animal, mouse, experiment

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