长期传代的大鼠骨髓间质干细胞的生物学特性分析

Biological characteristics of long passaging rat mesenchymal st em cells

目的 :通过对大鼠骨髓间质干细胞 (BMMSC)体外长期传代培养 ,进一步了解其增殖、表型变化及是否有突变倾向。方法 :用流式细胞仪分析 80 %融合生长的传代细胞的细胞周期、表型变化 ;并对早期和长期传代的BMMSC进行核型对比分析。结果 :早期和长期传代 (30代 )的BMMSC均呈现旺盛的的增殖力 ,但 4 0代BMMSC的表型与 2 0代以前则有所不同 ;早期和长期传代的BMMSC均显示正常核型。结论 :大鼠BMMSC可简便迅速地在体外长期扩增 ,在保持这种高增殖力的同时 ,核型仍保持正常二倍体 ;长期传代的BMMSC的表型变化提示其有一定自发分化趋势。

AIM: To investigate multi-potential of rat bo ne marrow mesenchymal stem cells (rBMMSC) and mutation inclination, the rBMMSC w ere long passaged in vitro. METHODS: Cellular cycles of diff erent passages were assayed by FA CSan flow cytometry and karyotypes of passage 6, passage 25 and passage 45 were compared by G-binding analysis. RESULTS: The early passages and long-term passages all showed st rong proliferation; passage 6, passage 25 and passage 45 all showed normal karyo type. CONCLUSION: Long-term culture and passage of rBMMSC still remain s strong proliferation. With this capability, the mutation inclination is not enhanced.