More than 90% of subcultured MSCs were adhesive in 12 h. The cell cycle analysis showed that 80% of MSCs was in G0/G1 phase. The ultrastructures of MSCs demonstrated the features of infantile cells.

• MSCs倍增时间约为 3 8h ,传代后 1 2h贴壁达 90%25以上 ,细胞周期显示有 80%25细胞处于G0 G1 期 ,并用电镜照片显示其超微结构。