Chinese Journal of Tissue Engineering Research ›› 2014, Vol. 18 ›› Issue (19): 2975-2980.doi: 10.3969/j.issn.2095-4344.2014.19.004

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Cultivation of myocardial tissue by using c-kit+ bone marrow mesenchymal stem cells and decellularized heart matrix

Zhang Guang-wei, Gu Tian-xiang, Guan Xiao-yu, Zhang Yu-hai   

  1. Department of Cardiac Surgery, the First Hospital of China Medical University, Shenyang 110003, Liaoning Province, China
  • Revised:2014-03-20 Online:2014-05-07 Published:2014-05-07
  • Contact: Gu Tian-xiang, M.D., Professor, Chief physician, Department of Cardiac Surgery, the First Hospital of China Medical University, Shenyang 110003, Liaoning Province, China
  • About author:Zhang Guang-wei, M.D., Lecturer, Attending physician, Department of Cardiac Surgery, the First Hospital of China Medical University, Shenyang 110003, Liaoning Province, China
  • Supported by:

    the Scientific Research Project of Liaoning Educational Bureau, No. L2011140, L2013297; Research Fund for the Doctoral Program of Higher Education of China, No. 20132104110004

Abstract:

BACKGROUND: Studies have found that c-kit+ bone marrow mesenchymal stem cells can differentiate into myocardial cells specifically, which may be the ideal seed cells.
OBJECTIVE: To investigate the feasibility of cultivation of myocardial tissue by using c-kit+ bone marrow mesenchymal stem cells and decellularized heart matrix.
METHODS: Heart tissues harvested from adult rats were decellularized for the following experiments. Primary rat bone marrow-derived mesenchymal stem cells were cultured in vitro. Until passage 8, bone marrow mesenchymal stem cells were enriched for c-kit and induced by 5 μmol/L 5-azacytidine for 2 weeks, and a second enrichment for the dihydropyridine receptor subunit α2δ1 was performed before analysis of cardiac differentiation or implantation into decellularized heart matrix for cultivation of myocardial tissue. Six weeks later, myocardial differentiation was identified by specific cardiac protein and action potential. Immunofluorescence staining was used to analysis neonatal myocardial tissue.
RESULTS AND CONCLUSION: Six weeks after the second enrichment, 60% bone marrow mesenchymal stem cells expressed cardiac troponin T, GATA binding protein 4, and connexin 43, and these cells could be induced to yield cardiac action potential, which was identified as cardiac differentiation. And when implanted into decellularized heart matrix, these cells could form myocardial tissue arranged regularly.


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: stem cells, mesenchymal stem cells, myocytes, cardiac

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