Object To study the fittest concentration of 5 azacytidine by which mesenchymal stem cells are induced into myoblast cells and the activity of the induced cells to get labile myoblast cells.Method To induce mesenchymal stem cells into myoblast cells by 5 azacytidine of different concentration.To detected the activity of the induced cells by the way of 3H TdR and the differentiation by immunohistochemistry.Result After mesenchymal stem cells were induced by 5 azacytidine of 10μmol/L concentration,i...