粒-巨噬细胞集落刺激因子对小鼠骨髓内皮细胞增殖的促进作用

Effects of Granulocyte-Macrophage Colony Stimulating Factor on Growth of Murine Bone Marrow Endothelial Cells

本研究以内皮细胞培养液(Endo-M)培养小鼠骨髓内皮细胞,探讨粒-巨噬系集落刺激因子(rmGM-CSF)对骨髓内皮细胞增殖的影响。用Endo-M培养小鼠骨髓内皮细胞,通过Wright-Giemsa染色计数内皮细胞集落、应用免疫荧光法观察内皮细胞表型;加入不同浓度的GM-CSF,通过集落形成率、MTT法和流式细胞术检测内皮细胞生长周期,观察GM-CSF对内皮细胞体外扩增的影响。结果表明:Endo-M诱导的骨髓细胞可以生成内皮细胞集落,vWF检测呈阳性;集落形成率检测及MTT法测定均证实GM-CSF对内皮细胞的增殖具有明显的促进作用;生长周期检测结果显示,GM-CSF处理组的细胞进入S期的比率为9.3%,而对照组为2.1%,说明GM-CSF可以通过促使内皮细胞进入S期而加快细胞的分裂,促进细胞增殖;比较第1代和第4次传代后细胞的生长曲线,两者无明显差别,说明多次传代后的细胞仍保持传代早期的增殖潜能。结论:GM-CSF对内皮细胞的增殖具有促进作用,经多次扩增传代后内皮细胞的增殖潜能无明显改变。

The purpose of this study was to investigate the effects of granulocyte-macrophage colony stimulating factor （GM-CSF） on the growth of mouse bone marrow endothelial cells. Endothelial cell culture medium （ Endo-M ） was used to culture murine bone marrow endothelial cells. Endothelial cell colonies were counted under microscope by Wright-Giemsa staining. The effect of different concentriation of GM-CSF on the proliferation of bone marrow endothelial cells was observed by the formation of endothelial cell colonies, MTT and flow cytometry. The results indicated that the endothelial specific marker vWF was expressed by the colony cells , GM-CSF promoted the proliferation of bone marrow endothelial cell colonies and MTT confirmed the effect of GM-CSF on promoting the proliferation of bone marrow endothelial cells. The result of detecting cell cycle showed that the rate of cells entering into S phase was 9.3% in GM-CSF added group and the rate of cells entering into S phase was 2.1% in control. There was no significant difference in cell growth curve between the first passage and fourth passage. It is concluded that GM-CSF can promote the proliferation of bone marrow endothelial cells, the proliferation potential of bone marrow endothelial cells between the first and fourth passage no significantly changes.