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重庆医科大学检验医学院血液教研室、临床检验诊断学教育部重点实验室、重庆市重点实验室,重庆,400016
纸质出版日期:2014,
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王 娟, 陈莎娜, 全 静, 等. 干扰核仁磷酸蛋白对人白血病OCI/AML3细胞凋亡的影响及其机制[J]. 重庆医科大学学报, 2014,38(11):1578-1583.
Wang Juan, Chen Shana, Quan Jing, et al. Effect of nucleophosmin(NPM) 1 knockdown on the apoptosis of OCI/AML3 leukemic cell with mutant NPM1 and its mechanisms[J]. Journal of Chongqing Medical University, 2014,38(11):1578-1583.
王 娟, 陈莎娜, 全 静, 等. 干扰核仁磷酸蛋白对人白血病OCI/AML3细胞凋亡的影响及其机制[J]. 重庆医科大学学报, 2014,38(11):1578-1583. DOI:
Wang Juan, Chen Shana, Quan Jing, et al. Effect of nucleophosmin(NPM) 1 knockdown on the apoptosis of OCI/AML3 leukemic cell with mutant NPM1 and its mechanisms[J]. Journal of Chongqing Medical University, 2014,38(11):1578-1583. DOI:
目的:探讨抑制核仁磷酸蛋白(nucleophosmin,NPM)1基因对人白血病细胞凋亡的影响及相关机制。方法:将空载慢病毒pGIPZ和NPM干扰慢病毒shNPM分别感染携带NPM1突变的OCI/AML3白血病细胞株以及对照白血病细胞株HL60。采用qRT-PCR、Western blot和免疫细胞化学法检测白血病细胞的shNPM组以及Mock和pGIPZ组细胞及NPM1 A型突变(NPM1-mA)基因和蛋白的表达,流式细胞仪和瑞氏染色法观察OCI/AML3的shNPM组以及Mock和pGIPZ组细胞凋亡情况,qRT-PCR和Western blot检测OCI/AML3的shNPM组以及Mock和pGIPZ组凋亡相关蛋白(Bax/Bcl-2)和p-ERK信号分子表达;流式细胞仪检测丝裂原活化蛋白激酶/胞外信号调节激酶信号通路抑制剂(PD98059)处理后OCI/AML3的shNPM组以及Mock和pGIPZ组细胞凋亡率的改变。结果:干扰NPM1明显抑制OCI/AML3细胞株NPM1-mA的mRNA水平(F=20.078;P=0.000,PMock vs. shNPM=0.001,PpGIPZ vs. shNPM=0.003,PMock vs. pGIPZ=0.333)和蛋白水平,伴有胞质NPM突变蛋白表达明显减弱;干扰NPM1能明显上调OCI/AML3细胞凋亡率 (F=25.236,P=0.000,PMock vs. shNPM=0.001,PpGIPZ vs. shNPM=0.001,PMock vs. pGIPZ=0.729),同时光镜下观察到干扰组细胞出现凋亡小体等凋亡形态学特征。此外,干扰NPM1可上调OCI/AML3细胞中促凋亡分子Bax的蛋白和mRNA表达(F=7.649,P=0.000;PMock vs. shNPM=0.015,PpGIPZ vs. shNPM=0.015,PMock vs. pGIPZ=0.984)、下调抗凋亡分子Bcl-2的蛋白和mRNA表达(F=5.190,P=0.000;PMock vs. shNPM=0.034,PpGIPZ vs. shNPM=0.029,PMock vs. pGIPZ=0.909);干扰NPM1能明显下调p-ERK的表达,PD98059抑制剂阻断MAPK通路可促进OCI/AML3细胞凋亡(F=25.643,P=0.007)。结论:NPM1突变基因在白血病细胞抗凋亡特性中发挥重要作用,潜在的分子机制可能与ERK信号分子及Bax/Bcl-2表达有关。
Objective:To investigate the effect of nucleophosmin 1(NPM1) on the apoptosis in leukemic cells and the relevant molec-ular mechanisms. Methods:OCI/AML3 cell lines(NPM1 mutant type) and HL60 cell lines(NPM1 wild type) were served as experi-mental group and negative control group. Mock group,pGIPZ group,shNPM group were established in the meantime. Expressions of the NPM1 mutant A(NPM1-mA) gene and protein were detected by qRT-PCR,Western blot and immune cytochemistry. Apoptosis analy-sis was determined by flow cytometry and Wright-Giemsa staining. The gene and protein expression of apoptosis related molecular(Bax/Bcl-2) was detected by qRT-PCR and Western blot and the activity of p-ERK was also assessed by Western blot. The percent-age of apoptotic cells was detected after treatment with MAPK/ERK pathway inhibitor(PD98059) by flow cytometry. Results:The re-sults showed significant down-regulation of NPM1-mA mRNA levels(F=20.078,P=0.000;PMock vs. shNPM=0.001,PpGIPZ vs. shNPM=0.003,PMock vs. pGIPZ=0.333) and protein levels after NPM1 silencing,accompanying by reduce of cytoplasm NPM mutant protein of OCI/AML3 cells. In OCI/AML3 cells,down-regulation of NPM1-mA resulted in increase of cell apoptotic rate(F=25.236,P=0.000;PMock vs. shNPM=0.001,PpGIPZ vs. shNPM=0.001,PMock vs. pGIPZ=0.729) and morphological changes including apoptosis bodies under light microscopy. NPM1 gene si-lencing led to increase of pro-apoptotic protein Bax expression(F=7.649,P=0.000;PMock vs. shNPM=0.015,PpGIPZ vs. shNPM=0.015,PMock vs. pGIPZ=0.984) and decrease of anti-apoptotic protein Bcl-2 expression at mRNA and protein levels(F=5.190,P=0.000,PMock vs. shNPM=0.034,PpGIPZ vs. shNPM=0.029,PMock vs. pGIPZ=0.909). NPM1 gene silencing can also down-regulate the expression of p-ERK. Furthermore,PD98059 promoted OCI/AML3 leukemic cell apoptosis(F=25.643,P=0.007). Conclusion:NPM1-mA plays an important role in leukemic cell anti-apoptosis,which involving MAPK signal pathway and Bax/Bcl-2 expression.
白血病核仁磷酸蛋白基因突变OCI/AML3细胞凋亡
leukemianucleophosmin 1(NPM1)gene mutationsOCI/AML3 cellsapoptosis
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