title: [Differentiation of mesenchymal stem cells into cardiomyocytes induced by cardiomyocytes].
abstract: OBJECTIVE
  To investigate the role of adult cardiomyocytes in the differentiation of mesenchymal stem cells (MSCs) into cardiomyocytes.
  
  
  METHODS
  Rat MSCs were isolated by a Percoll's gradient solution and cultured in low-glucose Dulbecco' s modified Eagle' s medium (DMEM). After 2 passages, cell-surface antigen CD34, CD71 and CD90 for rat MSCs were determined by flow cytometry, and these MSCs were transfected with pEGFP-N3 by Lipofectamine2000. Then those MSCs labeled with GFP, were cultured in contacted, nocontacted and conditioned with adult rat myocardiocytes. Immunofluorescence staining against alpha-actin, desmin, and troponin-T were performed after 1 week.
  
  
  RESULTS
  Immunofluorescence staining was positive against alpha-actin, desmin, and troponin-T on MSCs in contacted culture group. In contrast, no alpha-actin, desmin, and troponin-T expression on MSCs were observed in the noncontacted culture group and the conditioned culture group.
  
  
  CONCLUSIONS
  Direct cell-to-cell contact between MSCs and adult cardiomyocytes may induce differentiation of MSCs into cardiomyocytes.
authors.affiliation: Department of Cardiovascular Medicine, First Hospital, Xi'an Jiaotong University, Xi'an 710061, China.
authors.forename: Ting-Zhong
authors.initials: TZ
authors.lastname: Wang
authors.forename: Ai-Qun
authors.initials: AQ
authors.lastname: Ma
authors.forename: Zheng-Yun
authors.initials: ZY
authors.lastname: Xu
authors.forename: Wen-Hui
authors.initials: WH
authors.lastname: Jiang
authors.forename: Yuan
authors.initials: Y
authors.lastname: Du
mesh_terms: D000818:Animals; D018952:Antigens, CD34 / Q000032:analysis; D001854:Bone Marrow Cells / Q000166:cytology*; D002450:Cell Communication; D002454:Cell Differentiation / Q000502:physiology*; D002469:Cell Separation; D002478:Cells, Cultured; D018920:Coculture Techniques; D005260:Female; D008297:Male; D059630:Mesenchymal Stem Cells / Q000166:cytology*; D032383:Myocytes, Cardiac / Q000166:cytology*; D051381:Rats; D017207:Rats, Sprague-Dawley; D018800:Thy-1 Antigens / Q000032:analysis
chemical_list: D018952:Antigens, CD34; D018800:Thy-1 Antigens