The present study aimed to understand the effects of human UCB MSCs on the expansion of CD~+_(34) cells from UCB. Methods 1. Human UCB CD~+_(34) cells were incubated in the system containing UCB MSCs, HGFs and serum free medium.

• 方法(1)用含人脐血MSCs及不同造血生长因子(HGFs)组合的无血清扩增体系对人脐血CD+34细胞进行体外扩增。