不同来源基质细胞对骨髓瘤KM3细胞增殖和凋亡的影响

目的 观察人脐血基质细胞及骨髓瘤患者骨髓基质细胞对骨髓瘤KM3细胞生物学特性的作用.方法 体外分离培养骨髓瘤骨髓基质细胞和人脐血源基质细胞,与骨髓瘤KM3细胞共培养.采用扫描电镜观察共培养后基质细胞和KM3细胞的位相关系;应用CCK-8、P I染色流式细胞仪和Annexin V/P I双标法检测不同培养条件下KM3细胞的增殖、细胞周期和凋亡率.结果 人脐血基质细胞比骨髓瘤患者骨髓基质细胞有更强的抑制KM细胞增殖的作用;共培养后骨髓瘤患者骨髓基质细胞使KM3细胞阻滞于G0/G1期(59.70±1.28)%],人脐血基质细胞使S期的KM3细胞比例增高(46.07±2.46)%];KM3/MM-BMSCs组KM3细胞凋亡率为(3.26±0.12)%明显低于KM3/hUCBDSCs组KM3细胞凋亡率(4.76±0.12)%(P<0.01);KM3/MM-BMSCs组KM3细胞Bax mRNA的表达较KM3/hUCBDSCs组明显下降(P<0.01);KM3/hUCBDSCs组KM3细胞Bcl-2 mRNA的表达较KM3细胞悬浮培养组下降(P<0.05),KM3/MM-BMSCs组KM3细胞Bcl-2 mRNA的表达则明显升高,为悬浮培养组的1.982倍(P<0.01).结论 骨髓瘤基质细胞微环境抑制骨髓瘤细胞凋亡和死亡;而人脐血源基质细胞有更强的抑制骨髓瘤细胞增殖的作用,并促进其凋亡.

Effect of stromal cells derived from different origins on proliferation and apoptosis of KM3 cells

Objective To observe the effect of the human umbilical cord blood-derived stromal cells(hUCBDSCs)and multiple myeloma bone marrow stromal cells(MM BMSCs)on the biological characteristics of KM3 cells.Methods After KM3 cells were co-cultured with hUCBDSCs or MM BMSCs,the proliferation,cell cycle and the apoptotic rate were determined by growth curve plotting and flow cytometry respectively.Real-time Q-PCR was used to measure the mRNA expressions of Bcl-2 and Bax.Results As compared with MM BMSCs,hUCBDSCs mar...