Methods CD34 + cord cells were separated by MACS system from 9 fresh samples.Stromal cells in umbilical blood were cultured by using DEXTER culture system.

• 方法应用MACS磁珠分离系统分离脐带血CD34+细胞,按照DEXTER法行脐血基质细胞培养,观察不同时间、不同细胞因子组合基质细胞的生长状态。