中国组织工程研究 ›› 2014, Vol. 18 ›› Issue (41): 6597-6602.doi: 10.3969/j.issn.2095-4344.2014.41.007

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

兔骨髓间充质干细胞构建心脏电传导通路的潜能

周浩粤1,卢炯斌2,邱汉婴3   

  1. 1揭阳市人民医院心内科,广东省揭阳市  5220002东莞市人民医院心内科,广东省东莞市 523000;3汕头大学医学院第一附属医院心内科,广东省汕头市 515000
  • 修回日期:2014-09-15 出版日期:2014-10-01 发布日期:2014-10-01
  • 通讯作者: 周浩粤,硕士,主治医师,揭阳市人民医院心内科,广东省揭阳市 522000
  • 作者简介:周浩粤,男,1980年生,广东省揭阳市人,汉族,2010年汕头大学医学院毕业,硕士,主治医师,主要从事心内科及心脏电生理方面研究。

Construction of cardiac atrioventricular electrical conduction pathway by rabbit bone marrow mesenchymal stem cells

Zhou Hao-yue1, Lu Jiong-bin2, Qiu Han-ying3   

  1. 1Department of Cardiology, People’s Hospital of Jieyang City, Jieyang 522000, Guangdong Province, China; 2Department of Cardiology, People’s Hospital of Dongguan, Dongguan 523000, Guangdong Province, China; 3Department of Cardiology, First Affiliated Hospital of Shantou Medical University, Shantou 515000, Guangdong Province, China
  • Revised:2014-09-15 Online:2014-10-01 Published:2014-10-01
  • Contact: Zhou Hao-yue, Department of Cardiology, People’s Hospital of Jieyang City, Jieyang 522000, Guangdong Province, China
  • About author:Zhou Hao-yue, Master, Attending physician, Department of Cardiology, People’s Hospital of Jieyang City, Jieyang 522000, Guangdong Province, China

摘要:

背景:自体干细胞移植到心脏是目前治疗心力衰竭的一个研究方向,但自体骨髓间充质干细胞移植针对心脏传导系统方面的研究相对较少。

目的:评价兔骨髓间充质干细胞是否具有治疗心脏传导阻滞方面疾病的潜能。
方法:获取兔骨髓间充质干细胞并利用5-氮胞苷诱导为心肌样细胞。14只新西兰大白兔开胸手术后,将左心耳左心室前壁进行缝合(实验组8只,对照组6只)。术后1个月将实验组兔经5-氮胞苷诱导4周的自体骨髓间充质干细胞采用DAPI标记后,开胸直视下注射入左心室前壁-左心耳左心室缝合瘢痕区-左心耳;对照组予以培养基替代细胞。细胞移植后1个月再次开胸暴露心脏,在左心耳、左室前壁分别插入电极,进行心脏房室旁道的电生理检测,观察骨髓间充质干细胞是否在左心房左心室缝合瘢痕区形成房室旁道。
结果与结论:细胞移植到兔左心耳左心室缝合区后,实验组有2只兔子在行电生理刺激时心电图提示有房室旁道形成。移植后心脏冰冻切片在荧光显镜下能观察到移植的细胞在左心室和缝合区存活,而对照组则未有上述表现。骨髓间充质干细胞表达Cx43并与心肌细胞形成间隙连接的特点结合在细胞移植组中形成房室旁道的心脏电生理检测表现,提示骨髓间充质干细胞具备能够用于治疗心脏传导系统阻滞相关疾病的可能。

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


全文链接:

关键词: 干细胞, 骨髓干细胞, 心脏电生理, 骨髓间充质干细胞, 细胞移植, 房室旁路

Abstract:

BACKGROUND: Autologous stem cell transplantation to the heart is a research direction of heart failure treatment, but there are relatively few of studies about autologous bone marrow mesenchymal stem cell transplantation targeting the cardiac conduction system.

OBJECTIVE: To evaluate the potential of rabbit bone marrow mesenchymal stem cells for treatment of heart block.
METHODS: Rabbit bone marrow mesenchymal stem cells were induced by 5-azacytidine to differentiate into cardiomyocyte-like cells. After thoracotomy, the left atrium-left ventricular anterior wall was sutured in 14 New Zealand white rabbits (8 in the experimental group and 6 in the control group). One month after the surgery, in the experimental group, autologous bone marrow mesenchymal stem cells induced by 5-azacytidine for 4 weeks were labeled with 4',6-diamidino-2-phenylindole and then injected into the suture area when opening the thoracic again. In the control group, cells cultured in medium were used. One month after cell transplantation, the third thoracotomy was done to insert electrodes into the left atrium and left ventricular anterior wall, for cardiac electrophysiological detection. Whether atrioventricular pathway formed in the suture area was observed.
RESULTS AND CONCLUSION: After cells were transplanted into the sutured area, two rabbits in the experimental group were discovered to form the atrioventricular pathway in the sutured area through cardiac electrophysiological examination. After transplantation, transplanted cells were visible on the heart frozen sections under fluorescence microscope in the left ventricle and sutured area, but there was no cell in the control group. In the experimental group, bone marrow mesenchymal stem cells expressed Cx43 and formed gap junction intercellular communication with cardiomyocytes, which was presented as formation of the atrioventricular pathway on cardiac electrophysiology examination. These findings indicate that bone marrow mesenchymal stem cells can be used to treat cardiac conduction system block diseases.

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


全文链接:

Key words: bone marrow, mesenchymal stem cell transplantation, cardiac electrophysiology

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