胎儿骨髓基质细胞与外源性细胞因子的协同造血支持作用

目的 :探讨胎儿骨髓基质细胞与外源性细胞因子的协同造血支持作用。方法 :联合应用胎儿骨髓基质细胞与外源性细胞因子如重组人干细胞因子 (rh SCF)、IL - 3、IL - 6、粒巨噬细胞集落刺激因子 (GM- CSF)、粒细胞集落刺激因子 (G- CSF)、促红细胞生成素 (EPO)等先后对成人骨髓单个核细胞及 CD34 + 富集细胞培养 5 d至 2周。结果 :胎儿骨髓基质细胞与上述细胞因子具有良好的协同作用 ,CD34 +富集细胞以胎儿骨髓基质细胞 +SCF+IL- 3+IL- 6 +G- CSF+EPO培养 2周 ,可使细胞总数、粒 -单系造血祖细胞 (CFU- GM)、早期红系造血祖细胞 (BFU- E)及 CD34 +细胞分别扩增 (119.6± 30 .9)倍、(5 4.6± 17.4)倍、(2 5 .2± 4.4)倍、(11.1± 4.2 )倍。结论 :胎儿骨髓基质细胞可协同上述外源性细胞因子支持成人骨髓造血祖细胞的有效扩增

Fetal bone marrow stromal cells support the in vitro expansion of human hematopoietic bone marrow progenitor cells: requirement for cell-to-cell interactions and colony-stimulating factors

Objective： To elucidate the role of bone marrow stromal cells in cooperation with exogenous cytokines in hematopoiesis. Methods： Fetal bone marrow stromal cells (FBMSC) was combined with cytokines including SCF,IL-3,IL-6,GM-CSF in a 5-day liquid culture system of adult bone marrow mononuclear cells, then we cultured bone marrow derived CD34+-enriched cells with FBMSC+SCF+IL-3+IL-6+G-CSF+EPO for 2 weeks. Results：FBMSC were in good cooperation with above mentioned exogenous cytokines. When CD34+-enriched cells from adult bone marrow were cultured with combinations of FBMSC, SCF, IL-3, IL-6, G-CSF and EPO, total nucleated cells, CFU-GM, BFU-E and CD34+ cells were increased by 119.6±30.9, 54.6±17.4, 25.2±4.4, 11.1±4.2 folds, respectively. Conclusion：FBMSC in cooperation with exogenous cytokines support the in vitro expansion of human hematopoietic progenitor cells efficiently.