中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (33): 5275-5280.doi: 10.3969/j.issn.2095-4344.1828

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

慢病毒介导骨形态发生蛋白2和血管内皮生长因子165双基因转染骨髓间充质干细胞复合脱钙松质骨治疗兔股骨头坏死

马跃刚,李  强,陶  旋,周桢杰,朱伦井,段江涛   

  1. 桂林医学院附属医院,广西壮族自治区桂林市  541000
  • 修回日期:2019-06-05 出版日期:2019-11-28 发布日期:2019-11-28
  • 通讯作者: 李强,硕士,主任医师,教授,硕士生导师,桂林医学院附属医院,广西壮族自治区桂林市 541000
  • 作者简介:马跃刚,男,1994年生,浙江省诸暨市人,汉族,硕士,主要从事骨组织工程领域研究。
  • 基金资助:

    国家自然科学基金项目(31160199),项目负责人:李强;广西壮族自治区自然科学基金项目(2014GXNSFAA118263),项目负责人:李强;广西省教育厅科研项目(LX2014254),项目负责人:李强

Bone marrow mesenchymal stem cells co-transfected by lentivirus-mediated bone morphogenetic protein 2 and vascular endothelial growth factor 165 in combination with demineralized bone matrix for treating rabbit femoral head necrosis

Ma Yuegang, Li Qiang, Tao Xuan, Zhou Zhenjie, Zhu Lunjing, Duan Jiangtao   

  1. Affiliated Hospital of Guilin Medical University, Guilin 541000, Guangxi Zhuang Autonomous Region, China
  • Revised:2019-06-05 Online:2019-11-28 Published:2019-11-28
  • Contact: Li Qiang, Master, Chief physician, Professor, Master’s supervisor, Affiliated Hospital of Guilin Medical University, Guilin 541000, Guangxi Zhuang Autonomous Region, China
  • About author:Ma Yuegang, Master, Affiliated Hospital of Guilin Medical University, Guilin 541000, Guangxi Zhuang Autonomous Region, China
  • Supported by:

    the National Natural Science Foundation of China, No. 31160199 (to LQ); the Natural Science Foundation of Guangxi Zhuang Autonomous Region, No. 2014XNSFAA118263 (to LQ); Scientific Research Projects of Guangxi Education Department, No. LX2014254 (to LQ)

摘要:

文章快速阅读:

文题释义:
血管内皮生长因子165:
主要作用是促进血管生成及增加毛细血管通透性,也能促进骨髓间充质干细胞的增殖与分化,其在骨折愈合过程中不可或缺。
慢病毒载体:是以人HIV-1来源的病毒载体,携带外源基因,通过感染细胞,将外源基因整合入宿主细胞的基因组中,且不会因为宿主细胞的分裂增殖而消失,具有高感染率,使目的基因在宿主细胞中长期而稳定的表达。

摘要
背景:
骨形态发生蛋白2和血管内皮生长因子165均在骨修复过程中扮演着重要角色。利用慢病毒介导这2种基因转染骨髓间充质干细胞复合脱钙松质骨治疗骨损伤具有重要意义。
目的:观察慢病毒介导骨形态发生蛋白2和血管内皮生长因子165基因共转染骨髓间充质干细胞复合脱钙松质骨治疗兔股骨头坏死的效果,以此来探讨双基因在未来骨损伤修复过程中的可行性。
方法:采用液氮冰冻联合髓芯减压方法制备股骨头坏死模型,将造模成功的实验兔分为3组(n=12):①未转染组:植入骨髓间充质干细胞复合脱钙松质骨;②单基因转染组:植入骨形态发生蛋白2转染的骨髓间充质干细胞复合脱钙松质骨;③双基因转染组:植入骨形态发生蛋白2和血管内皮生长因子165共转染的骨髓间充质干细胞复合脱钙松质骨。术后3,6,9周各组分别处死4只兔子,Western blot检测股骨头内骨形态发生蛋白2蛋白的表达量;苏木精-伊红染色观察股骨头坏死修复情况。实验方案经桂林医学院动物实验伦理委员会批准。
结果与结论:①术后3,6,9周各组均有骨形态发生蛋白2阳性表达,单基因转染组、双基因转染组表达量均高于未转染组(P < 0.05),且呈递增趋势;术后3周,单基因转染组、双基因转染组骨形态发生蛋白2表达差异无显著性意义(P > 0.05);术后第6,9周,双基因转染组骨形态发生蛋白2表达量明显高于单基因转染组(P < 0.05);②术后9周,双基因转染组新生骨痂可填满股骨头缺损处,未转染组、单基因转染组虽有骨痂形成,但均未填满缺损处;苏木精-伊红染色示未转染组有初级骨小梁形成,但骨细胞坏死较多,骨小梁较少;单基因转染组有大量骨小梁形成,形态较好,仅有部分中断,仍不及正常骨组织;双基因转染组形成大量成熟致密骨小梁,形态与正常骨组织无明显差异;③结果表明,慢病毒介导骨形态发生蛋白2和血管内皮生长因子165双基因共转染兔骨髓间充质干细胞复合脱钙松质骨治疗股骨头坏死的效果优于骨形态发生蛋白2单基因转染形式,且目的蛋白能在体内长期有效表达。


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
ORCID: 0000-0002-4622-7919(马跃刚)

关键词: 慢病毒, 骨髓间充质干细胞, 骨形态发生蛋白 2, 血管内皮生长因子 165, 脱钙松质骨, 双基因转染, 股骨头坏死, 国家自然科学基金

Abstract:

BACKGROUND: Bone morphogenetic protein 2 (BMP-2) and vascular endothelial growth factor 165 (VEGF-165) play important roles in bone repair. It is of great significance to treat bone injury by lentivirus-transfected bone marrow mesenchymal stem cells combined with demineralized bone matrix.
OBJECTIVE: To observe the therapeutic effects of bone marrow mesenchymal stem cells with lentivirus-mediated BMP-2 and VEGF-165 co-transfection and demineralized bone matrix in a rabbit model of osteonecrosis of the femoral head, so as to explore the feasibility of dual genes in the bone repair.
METHODS: Femoral head necrosis model was prepared by liquid nitrogen freezing combined with core decompression. Rabbit models successfully prepared were divided into three groups (n=12/group): non-transfection group, treated with bone marrow mesenchymal stem cells combined with demineralized bone matrix; single gene transfection group, treated with BMP-2-transfected bone marrow mesenchymal stem cells combined with demineralized bone matrix; dual-gene transfection group, treated with BMP-2 and VEGF-165 co-transfected bone marrow mesenchymal stem cells combined with demineralized bone matrix. Four rabbits from each group were sacrificed at 3, 6, and 9 weeks postoperatively. Western blot was used to detect the expression of BMP-2 protein in the femoral head of each group. Hematoxylin-eosin staining was used to observe the repair of femoral head necrosis in each group. The study protocol was approved by the Animal Ethics Committee of Guilin Medical University.
RESULTS AND CONCLUSION: BMP-2 positively expressed in all groups at 3, 6, and 9 weeks postoperatively, and the positive expression of target protein was significantly higher in the two transfection groups than the non-transfection group (P < 0.05). The positive expression of BMP-2 in the two transfection groups showed an increasing trend at three time periods. At 3 weeks postoperatively, there was no difference in the BMP-2 expression between the two transfection groups, while the BMP-2 expression was significantly increased in the dual-gene transfection group compared with the single gene transfection group at 6 and 9 weeks postoperatively (P > 0.05). In the dual gene transfection group, new osteophytes could fill in the defect of the femoral head at 9 weeks postoperatively, while in the other two groups, new osteophytes formed were not enough to fill in the defect. Hematoxylin-eosin staining indicated that primary trabeculae were formed in the non-transfection group, but there were more necrotic cells and less bone trabeculae. In the single gene transfection group, a large amount of trabeculae formed with good shape, some of which however were inferior to normal bone tissues because of fractures. In the dual gene transfection group, a mass of mature and dense trabeculae were formed and had normal shape. To conclude, lentivirus-mediated BMP-2 and VEGF-165 co-transfection is superior to single BMP-2 transfection in the combination of bone marrow mesenchymal stem cells and demineralized bone matrix for treating femoral head necrosis. Moreover, in vivo expression of target protein persists for a long time.

Key words: lentivirus, bone marrow mesenchymal stem cells, bone morphogenetic protein 2, vascular endothelial growth factor 165, demineralized bone matrix, double gene transfection, femoral head necrosis, National Natural Science Foundation of China

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