摘要:
Objective To investigate the expression profile of cancer-related genes in human bone marrow-derived neural stem cells (Md-NSCs) to determine whether there are any characteristics that could help the evaluation of their tumorigenic potentials.Methods Md-NSCs were cultured in vitro and identified (experimental group);fresh human adult bone marrow cells were used as control group (sifting erythrocytes).The expression profiles of 440 cancer-related genes in cells from the two groups were analyzed by Oligo GEArray Human Cancer Microarray OHS-802;real-time quantitative PCR was performed to detect the expressions of oncogene MYC,matrix metalloproteinase 2 (MMP2),Notch congener 2 (Notch2),stanniocalcin 1 (STC1),integrin α3 (ITGA 3),signal transduction and transcriptional activation factor 5b (STA T5b),Ras congene gene family C (RhoC),and wingless-type MMTV integration site family member 1 (Wnt1).Results As compared with those in the control group,the Md-NSCs from experimental group had 66 tumor-related genes with high expressions (>3 folds).MYC,MMP2,Notch2,STCI,ITGA3,STA T5b,RhoC and Wnt1 expressions in the Md-NSCs from experimental group were significantly higher than those in the control group (P<0.05),whose results were accorded with genechip detection results,enjoying the folds of 4.35×100,2.84×100,2.87×100,3.41 ×102,2.22×102,6.99× 100,4.92 × 100 and 3.64 ×100,respectively.Conclusion A number of cancer-related genes are over-expressed in Md-NSCs,and the activations of some of these important oncogenes have been proved to promote human tumorigenesis.%目的 检测成人骨髓源性神经干细胞(Md-NSCs)中肿瘤相关基因的表达情况,评价其致瘤性. 方法 将体外培养并鉴定过的Md-NSCs作为实验组,以新鲜正常成人骨髓细胞去红细胞作为对照组.用人肿瘤基因芯片检测2组细胞440个肿瘤相关基因的表达;实时定量RT-PCR检测2组细胞癌基因MYC、基质金属蛋白酶2(MMP2)、Notch同源物2(Notch2)、斯钙素1(STC1)、整合素α3(ITGA3)、信号转导与转录激活因子5b (STAT5b)、Ras同源物基因家族成员C (RhoC)、无翅型小鼠乳腺肿瘤病毒(MMTV)整合位点家族成员1(Wnt1)的表达. 结果 基因芯片检测结果显示,与对照组比较,实验组Md-NSCs中有66个肿瘤相关基因呈高度表达.实时定量RT-PCR检测结果显示,与对照组比较,实验组Md-NSCs中癌基因MYC、MMP2、Notch2、STC1、ITGA3、STAT5b、RhoC、Wnt1均呈高度表达,与基因芯片检测的结果相符.各高度表达基因及其表达倍数分别为:MYC (4.35 ×100)、MMP2 (2.84 ×100)、Notch2 (2.87×100)、STC1 (3.41 ×102)、ITGA3 (2.22×102)、STAT5b(6.99×100) 、RhoC(4.92×100) 、Wnt1(3.64×100). 结论 大量的肿瘤相关基因在Md-NSCs呈高度表达,其中部分基因的激活已被证实可以促进肿瘤的发生.