J4 ›› 2012, Vol. 38 ›› Issue (3): 461-464.

• 基础研究 • 上一篇    下一篇

GATA4基因修饰骨髓间充质干细胞对心肌梗死大鼠心功能的影响

赵东海1|罗树立2|李大鹏3   

  1. 1.吉林医药学院病理学教研室,吉林 吉林 132013;2.吉林省长春市中心医院胸外科|吉林 长春130051;3.吉林医药学院附属医院呼吸内科|吉林 吉林 132013
  • 收稿日期:2011-11-19 出版日期:2012-05-28 发布日期:2012-05-28
  • 通讯作者: 赵东海(Tel:0432-64560025,E-mail:zdh1027@sina.com) E-mail:zdh1027@sina.com
  • 作者简介:赵东海(1975-)|男|吉林省农安县人|副教授,医学博士|主要从事干细胞工程研究。
  • 基金资助:

    吉林省教育厅“十一五”科学技术研究项目资助课题(2009309)

Effect of mesenchymal stem cells modified by GATA4 |on heart function |in rats with myocardial infarction

ZHAO Dong-hai1,LUO Shu-li2,LI Da-peng3   

  1. 1. Department of Pathology,Jilin Medical College,Jilin 132013,China;2. Department of Thoracic Surgery,Changchun Central Hospital,Changchun 130051,China;3. Department of Respiratory Medicine,Affiliated Hospital,Jilin Medical College,Jilin 132013,China
  • Received:2011-11-19 Online:2012-05-28 Published:2012-05-28

摘要:

目的: 研究锌指转录因子(GATA4)基因修饰骨髓间充质干细胞(MSCs)对心肌梗死大鼠心功能的影响,为进一步探讨其机制提供依据。方法: 构建GATA4-pEGFP基因质粒,体外分离培养大鼠MSCs,利用脂质体将质粒转染入MSCs。40只SD大鼠制备大鼠心肌梗死模型,于术后10 d测定心功能指标。将模型鼠随机分为MSCs 组和DMEM组,每组各20只。MSCs 组将GATA4-pEGFP基因修饰的MSCs植入心肌梗死后10 d大鼠心肌梗死区,DMEM组同时注射等体积无血清DMEM于心肌梗死区。移植注射后4周,检测左心室射血分数(LEVF)和左室缩短分数(FS)。结果: 体外分离培养的MSCs呈梭形或条形,贴壁生长 。 GATA4-pEGFP重组基因质粒转染MSCs 2周后,可见细胞中有绿色荧光蛋白表达。移植4周后,MSCs组大鼠LEVF(85%±7%)明显高于DMEM组(47%±4%)(P<0.01); MSCs组大鼠FS(52%±6%)明显高于DMEM组(35%±8%)(P<0.01)。结论: GATA4基因修饰的MSCs移植能够改善心肌梗死大鼠心功能。

关键词: GATA4基因;骨髓间充质干细胞;心肌梗死;心功能

Abstract:

Objective
To  investigate the effect of mesenchymal stem cells(MSCs) modified by GATA4- pEGFP gene on heart function in myocardial infarction rats and to provide basis for further research on its mechanism.Methods The MSCs were isolated and cultured in vitro.GATA4-pEGFP plasmid was constructed and transfected into MSCs by liposome.40 SD rats were operated to prepare myocardial infarction models and the heart function indexes of the models were evaluated 10 d after the operation.The model rats were randomly divided into MSCs group (n=20) and DMEM group (n=20).The MSCs modified by GATA4-pEGFP gene was transplanted into the area of myocardial infarction of rats 10 d after infarction in MSCs group. The equal volume of  serum-free  DMEM was injected into the myocardial infarction area of rats at the same time in DMEM group.The  left ventricular ejection fraction (LVEF) and fractional shortening (FS) 4 weeks after injecting were detected.Results The isolated   MSCs in vitro  adhered to the plate and they presented fusiform or spindle shape.2 weeks after transfection with  recombinant gene plasmid GATA4-pEGFP,the green fluorescence protein  expressed in  MSCs.4 weeks after  transplantation,the LEVF value in MSCs group(85%±7%) was  increased significantly compared with DMEM group(47%±4%) (P<0.01),and the FS value in MSCs group  (52%±6%) was also increased significantly compared with  DMEM group  (35%±8%)(P<0.01).Conclusion The heart function of myocardial infarction rat can be improved by transplanting MSCs modified by GATA4 gene.

Key words:  GATA4 gene;mesenchymal stem cells;myocardial infarction;heart function

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