MSCs showed active proliferative ability in primary and passage cultere before the 14 th . Cell cycle analysis showed that 82% of MSCs was in G 0/G 1 phase.

• 原代及传代培养显示 ；14代以前的MSCs具有活跃的增殖能力 ；细胞周期分析显示有 82%25的MSCs处于G0 /G1期 .