中国组织工程研究 ›› 2020, Vol. 24 ›› Issue (5): 667-672.doi: 10.3969/j.issn.2095-4344.1937

• 骨组织构建 bone tissue construction • 上一篇    下一篇

不同组织部位诱导膜血管化及成骨因子表达的比较

李树源1,周琦石2,李  悦2,周宏亮1,杨佳宝1,胡  柽1   

  1. 1广州中医药大学第一临床医学院,广东省广州市  510405;2广州中医药大学第一附属医院,广东省广州市  510405
  • 收稿日期:2019-04-08 修回日期:2019-04-17 接受日期:2019-05-23 出版日期:2020-02-18 发布日期:2020-01-08
  • 通讯作者: 周琦石,广州中医药大学第一附属医院一骨科,广东省广州市 510405
  • 作者简介:李树源,男,1991年生,山西省汾阳市人,汉族,广州中医药大学第一临床医学院在读硕士,主要从事创伤骨科研究。
  • 基金资助:
    国家自然科学基金资助项目(81674001)

Comparisons of induced membrane vascularization and osteogenic factor expression in different tissue sites

Li Shuyuan1, Zhou Qishi2, Li Yue2, Zhou Hongliang1, Yang Jiabao1, Hu Cheng1   

  1. 1The First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou 510405, Guangdong Province, China; 2First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510405, Guangdong Province, China
  • Received:2019-04-08 Revised:2019-04-17 Accepted:2019-05-23 Online:2020-02-18 Published:2020-01-08
  • Contact: Zhou Qishi, First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510405, Guangdong Province, China
  • About author:Li Shuyuan, Master candidate, The First Cliical Medical College, Guangzhou University of Chinese Medicine, Guangzhou 510405, Guangdong Province, China
  • Supported by:
    the National Natural Science Foundation of China, No. 81674001

摘要:

文题释义

诱导膜技术:又称膜诱导技术、Masquelet技术,1986年由Masquelet等最先提出并使用,是一种重建超临界尺寸骨缺损的有效方法。该技术在清创后所形成的骨缺损处植入骨水泥占位器,以形成一层生物膜,并在所形成的膜内进行植骨对骨缺损进行二次重建。该技术修复大段骨缺损具有重建时间短、骨愈合率高、并发症发生率较低等优势,其疗效已经被广泛证实。

血管内皮生长因子:是一种生长因子,在血管生成中发挥重要作用。血管内皮生长因子与血管内皮表面的特异性受体结合,可以促进内皮细胞的增殖、迁移,并可增加局部毛细血管的通透性,促使纤维蛋白原渗出,为血管内皮细胞的迁移和血管形成提供基质。在促进骨愈合方面,血管内皮生长因子通过促进血管增生,协调软骨细胞的消长、细胞外基质的改建,加快软骨内成骨。血管内皮生长因子还可以趋化并促进成骨细胞的分化,使碱性磷酸酶活性增强,局部钙盐沉积增加,促进骨愈合。

背景:研究发现在皮下、肌肉等部位植入聚甲基丙烯酸甲酯骨水泥也可形成诱导膜,膜内同样具有微血管的形成并分泌多种成骨因子。

目的:比较皮下、肌肉、股骨骨缺损处诱导膜内血管化程度和成骨因子表达的差异。

方法:将36只雄性SD大鼠(购自广州中医药大学实验动物中心)随机分为3组,分别在后肢皮下、肌肉内、股骨骨缺损处植入聚甲基丙烯酸甲酯抗生素骨水泥占位器,每组12只。植入6周后,取出骨水泥周围的诱导膜,苏木精-伊红染色观察诱导膜组织形态结构变化,Western Blot印迹方法、RT-qPCR法、免疫组织化学染色法检测诱导膜中骨形态发生蛋白2、转化生长因子β1、血管内皮生长因子的表达情况。实验获得广州中医药大学动物实验伦理委员会批准,批准号:20181101006。

结果与结论:①苏木精-伊红染色显示3组均可形成诱导膜,但骨缺损组诱导膜组织切片外层血管数量较肌肉组、皮下组多,靠近骨水泥侧的内层成纤维细胞和肌纤维细胞数量较肌肉组、皮下组多;②免疫组织化学染色显示,骨缺损组骨形态发生蛋白2、转化生长因子β1、血管内皮生长因子阳性表达最多,皮下组最少;③Western Blot与RT-qPCR检测显示,骨缺损组骨形态发生蛋白2、转化生长因子β1、血管内皮生长因子表达均多于肌肉组、皮下组(P < 0.001);④结果表明,不同的周围组织条件对诱导膜的组织结构和成骨因子表达有重要影响,在骨缺损处植入聚甲基丙烯酸甲酯骨水泥可提高诱导膜的形成质量,膜内新生血管更丰富,骨生长因子的表达量更多。

ORCID: 0000-0003-1405-0765(李树源)

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: 诱导膜, 聚甲基丙烯酸甲酯, 皮下, 肌肉, 股骨骨缺损, 血管, 骨形态发生蛋白2, 转化生长因子β1, 血管内皮生长因子, 骨重建

Abstract:

BACKGROUND: Studies have found that polymethylmethacrylate bone cement implanted in the subcutaneous region, muscle and other parts can form induced membrane. The induced membrane favors vascularization and secretes multiple osteogenic factors.

OBJECTIVE: To investigate the differences in the level of vascularization and the expression of osteogenic factors in the induced membrane among subcutaneous region, muscle and femoral bone defects.

METHODS: Thirty-six male SD rats (purchased from the Experimental Animal Center of Guangzhou University of Chinese Medicine) were randomly divided into three groups (n=12/group). PolymethyImethacrylate antibiotic cement spacers were implanted in the subcutaneous tissue, muscle and femoral bone defects of the hind limbs. At 6 weeks after implantation, the induced membrane around the bone cement was removed. The change in membrane morphology was observed by hematoxylin-eosin staining. Expression of bone morphogenetic protein-2, transforming growth factor-β1 and vascular endothelial growth factor in the induced membrane was detected by western blot, RT-qPCR and immunohistochemistry. This study was approved by Animal Ethics Committee, Guangzhou University of Chinese Medicine, China (approval No. 20181101006).

RESULTS AND CONCLUSION: Hematoxylin-eosin staining showed that induced membrane formed in each group. The number of vessels in the outer layer of the membrane tissue section was higher in the femoral bone defect groups than that in the muscle and subcutaneous tissue group. The number of fibroblasts and myofibroblasts in the inner layer close to the bone cement was higher in the femoral bone defect group than in the muscle and subcutaneous tissue groups. Immunohistochemical staining revealed that bone morphogenetic protein-2, transforming growth factor-β1 and vascular endothelial growth factor expression levels were highest in the femoral bone defect group and lowest in the subcutaneous tissue group. Western blot and RT-qPCR showed that bone morphogenetic protein 2, transforming growth factor β1 and vascular endothelial growth factor expression levels were significantly higher in the femoral bone defect group than in the muscle and subcutaneous tissue groups (P < 0.001). These findings suggest that different surrounding tissue conditions have different important influences on tissue structure and osteogenic factor expression in the induced membrane. Polymethylmethacrylate bone cement implanted in the femoral bone defects can improve the quality of induced membrane formation, lead to a larger amount of newly formed vessels and higher osteogenic factor expression in the induced membrane.

Key words: induced membrane, polymethyImethacrylate, subcutaneous, muscle, femoral bone defect, vessel, bone morphogenetic protein 2, transforming growth factor β1, vascular endothelial growth factor, bone remodeling

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