Chinese Journal of Tissue Engineering Research ›› 2017, Vol. 21 ›› Issue (13): 1974-1979.doi: 10.3969/j.issn.2095-4344.2017.13.002

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Cardiomyocyte-like differentiation of bone marrow mesenchymal stem cells:an association between related gene expression and cell morphological changes

Xu Yi-chen, Liu Ling-long, Zhao Wen-jing, Wang Hui-feng, Wei Ya-shu, Chen Wei-ping   

  1. Department of Histology and Embryology, Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
  • Revised:2016-12-22 Online:2017-05-08 Published:2017-06-09
  • Contact: Chen Wei-ping, Professor, Department of Histology and Embryology, Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
  • About author:Xu Yi-chen, Studying for master’s degree, Department of Histology and Embryology, Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
  • Supported by:

    Guangxi Emergency and Medical Rescue Talent Small Highland • Guangxi University Emergency Laboratory Key Laboratory Open Topics, No. GXJZ201505; the Science Foundation for the Youth in the Guangxi Medical University, No. GXMUYSF201528; the Natural Science Foundation of Guangxi Zhuang Autonomous Region, No. 2012GXNSFAA053126, guikezi0832157, guikegong0592007-1G, guikeqing0229009; Key Experiments of Human Development and Disease Research in Guangxi Universities, No. 0102402214009C

Abstract:

BACKGROUND: Bone marrow mesenchymal stem cells (BMSCs) have been induced to differentiate into cardiomyocyte-like cells in vitro.
OBJECTIVE: To explore the association between GATA-4, Nkx-2.5 and α-myosin heavy chain (α-MHC) expression and cell morphological changes and structure formation in the process of BMSCs differentiation into cardiomyocyte-like cells.
METHODS: By using myocardial lysate, BMSCs were induced to differentiate into cardiomyocytes. Immunocytochemistry staining was used to detect cardiac troponin T (cTnT) and connexin43, for the identification of cardiomyocytes. In the process of directional differentiation, RT-PCR was used to detect the expression of GATA-4, Nkx2.5 and α-MHC.
RESULTS AND CONCLUSION: During the directional differentiation of BMSCs, the cells were changed from long fusiform to short rod, forming protrusions that were interconnected to form mesh-like, bamboo-like or myotube-like structure. When the cells were interconnected like a bamboo, cTNT and connexin43 positive cells were visible, and then the number of positive cells increased with the presence of myotube-like structure. RT-PCR results showed that during the induced directional differentiation of BMSCs, GATA-4, Nkx2.5 and α-MHC mRNA levels increased continuously. When interconnected cells formed a mesh-like structure, GATA-4 expression reached the peak and then kept a high level. When adjacent cells were fused into a myotube-like structure, α-MHC reached the peak. Additionally, the expression of Nkx2.5 presented a time-dependent increase trend. Overall, during the induced differentiation of BMSCs into cardiomyocyte-like cells, the expression of cardiomyocyte specific genes, characterized by temporality and spatiality, is related to the changes of cell morphology and special structure formation.

 

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: Mesenchymal Stem Cells, Flow Cytometry, Immunohistochemistry, Myocytes, Cardiac, Tissue Engineering

CLC Number: