中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (9): 1397-1401.doi: 10.3969/j.issn.2095-4344.2017.09.016

• 干细胞移植 stem cell transplantation • 上一篇    下一篇

碱性成纤维细胞生长因子基因修饰骨骼肌卫星细胞自体移植急性心肌梗死组织的血管新生

许志锋,李敬来,韩  振,冯  钢,任明明   

  1. 北京大学深圳医院心血管外科,广东省深圳市  518036
  • 出版日期:2017-03-28 发布日期:2017-03-31
  • 通讯作者: 李敬来,博士,主任医师,北京大学深圳医院心血管外科,广东省深圳市 518036
  • 作者简介:许志锋,男,1982年生,广东省茂名市人,汉族,北京大学医学部在读博士,主治医师,主要从事心血管外科方面的研究。
  • 基金资助:

    深圳市科技计划项目(200404104)

Effects of basic fibroblast growth factor modified skeletal muscle satellite cell transplantation on neovascularization following acute myocardial infarction

Xu Zhi-feng, Li Jing-lai, Han Zhen, Feng Gang, Ren Ming-ming   

  1. Department of Cardiovascular Surgery, Shenzhen Hospital, Peking University, Shenzhen 518036, Guangdong Province, China
  • Online:2017-03-28 Published:2017-03-31
  • Contact: Li Jing-lai, M.D., Chief physician, Department of Cardiovascular Surgery, Shenzhen Hospital, Peking University, Shenzhen 518036, Guangdong Province, China
  • About author:Xu Zhi-feng, Studying for doctorate, Attending physician, Department of Cardiovascular Surgery, Shenzhen Hospital, Peking University, Shenzhen 518036, Guangdong Province, China
  • Supported by:

     the Science and Technology Project of Shenzhen City, No. 200404104

摘要:

文章快速阅读:

文题释义:
骨骼肌卫星细胞移植治疗心肌梗死:
骨骼肌卫星细胞是一种具有多向分化能力的全能干细胞,存在于骨骼肌间质中,在成年哺乳动物骨骼肌中占1.0%-4.5%,对缺血、缺氧有一定的耐受力,是干细胞工程中重要来源细胞。近年来,开始有人尝试利用自体骨骼肌干细胞心肌内移植治疗心肌梗死,发现通过诱导卫星细胞可分化成心肌样细胞,具有相似心肌细胞规律的收缩功能及润盘结构,这些研究在一定程度上取得了进展,但总体效果不佳,其中最主要问题是移植细胞存活率较低,梗死区特别是梗死中心区细胞修复很不满意,可能与梗死区局部缺血、缺氧等恶劣微环境影响细胞的存活及功能的发挥有关。
碱性成纤维细胞生长因子移植治疗心肌梗死:碱性成纤维细胞生长因子可促进成纤维细胞、血管内皮细胞、软骨细胞、成骨细胞等增殖,并有促进血管新生,改善细胞生活微环境,提高移植细胞的存活率的功能。研究表明,心肌内注射碱性成纤维细胞生长因子在一定程度上可增加梗死区血流,不同程度改善心脏功能,增加移植细胞的存活,但由于其很快就被代谢掉,作用时间短暂,往往达不到预期效果。

 

摘要
背景:
前期研究发现,骨骼肌卫星胞移植能够诱导心肌梗死区新生血管形成,缩小梗死面积,改善其心功能,但整体效果并不太理想。
目的:观察碱性成纤维细胞生长因子基因修饰骨骼肌卫星细胞在急性心肌梗死区的存活及对心肌梗死区血管新生的影响。
方法:将18只新西兰大白兔随机分为3组,实验组、对照组结扎冠状动脉左前降支,构建急性心肌梗死动物模型;空白对照组只穿线,不结扎。造模成功即刻,实验组于局部梗死心肌内注射DAPI标记的碱性成纤维细胞生长因子基因修饰自体骨骼肌卫星细胞悬液50 μL,对照组注射等量DAPI标记的自体骨骼肌卫星细胞。细胞移植4周后取标本,观察心肌梗死区骨骼肌卫星细胞存活及成纤维细胞生长因子基因表达情况,免疫组织化学染色检查心肌梗死区新生血管形成情况。
结果与结论:①空白对照组未见DAPI标记的细胞,对照组及实验组缺血心肌区域均可见大量DAPI标记的骨骼肌卫星细胞,实验组还可见大量EGFP-碱性成纤维细胞生长因子融合蛋白绿色荧光表达;②实验组、对照组新生微血管密度多于空白对照组(P < 0.05),实验组新生微血管密度多于对照组(P < 0.05);③结果表明,碱性成纤维细胞生长因子修饰骨骼肌卫星细胞可在急性心肌梗死区存活,促进心肌梗死区血管新生。

 

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: 0000-0002-2093-632X(李敬来)

关键词: 干细胞, 移植, 干细胞移植, 骨骼肌卫星细胞, 骨骼肌干细胞, 碱性成纤维细胞生长因子, 基因修饰, 心肌梗死, 血管生成

Abstract:

BACKGROUND: Previous studies have found that skeletal muscle satellite cell transplantation can induce angiogenesis in myocardial infarction area, reduce infarct size and improve cardiac function. But the overall effect is not satisfactory.
OBJECTIVE: To observe the survival of basic fibroblast growth factor (bFGF) gene modified skeletal muscle satellite cells in acute myocardial infarction and to observe the expression of bFGF gene and the effect of cell transplantation on angiogenesis in myocardial infarction area.
METHODS: Eighteen New Zealand white rabbits were divided into three groups by random: skeletal muscle satellite cell group (control group), bFGF gene enhanced skeletal muscle satellite cell group (experimental group) and blank control group. The left anterior descending branch of the coronary artery of the rabbits was ligated so as to establish an animal model of acute myocardial infarction in the former two groups. After labeled by DAPI before transplantation, the skeletal muscle satellite cells, bFGF gene modified skeletal muscle satellite cells and the equivalent amount of DMEM/F12 were injected into the local infarct myocardium correspondingly. Samples were taken 4 weeks after transplantation. Then, the survival of skeletal muscle satellite cells and the expression of bFGF gene were observed under light microscope and fluorescence microscope, and the neovascularization in the myocardial infarction area was examined by immunohistochemical staining.
RESULTS AND CONCLUSION: No DAPI-labeled cells were visible in the blank control group, but in the other two groups, a large amount of DAPI-labeled skeletal muscle satellite cells were seen in the infarction area. Enhanced green fluorescent protein was highly expressed in the experimental group. Microvessel density in the infarction area was highest in the experimental group followed by the control and blank control groups (P < 0.05). These findings indicate that bFGF gene modified skeletal muscle satellite cells can survive and promote neovascularization in the acute myocardial infarction area.

 

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

Key words: Satellite Cells, Skeletal Muscle, Fibroblast Growth Factors, Cell Transplantation, Gene Therapy, Tissue Engineering

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