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1·The positive cells displayed brownish yellow granules on the surface, cytoplasm and intercalated disc.

在细胞表面、胞浆中及闰盘处出现棕黄色颗粒为阳性细胞。

2·CONCLUSION: During the process of BMMSCs differentiating into cardiomyocytes, intercalated disc-like structure is gradually formed with increase in culture time and cell density.

结论：骨髓间质干细胞分化为心肌细胞过程中，随培养时间延长及细胞密度增加逐渐形成闰盘样结构。