目的：评价CD 34 +细胞体外扩增时高增殖潜能集落形成细胞(HPP CFC)的变化。

Objective: To evaluate the changes of colony forming cells with high proliferative potential (HPP CFC) in human CD34 + cell culture after in vitro amplification.

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结论PF具有细胞免疫调节作用，同时对受照机体的脾集落形成细胞也有一定的保护作用。

Conclusion PF might act as an immune modulator and have a certain protective effect on colony-forming cells in spleen for irradiated organism.

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