机构地区:[1]上海交通大学附属儿童医院上海市儿童医院普外科,200040 [2]上海交通大学附属儿童医院上海市儿童医院血液科,200040 [3]上海交通大学附属儿童医院上海市儿童医院中心实验室,200040
出 处:《中华实用儿科临床杂志》2015年第15期1164-1167,共4页Chinese Journal of Applied Clinical Pediatrics
基 金:上海市科学技术委员会科研计划课题(12411952405);上海市科学技术委员会样本库建设平台项目(12DZ2295006)
摘 要:目的体外观察不同浓度三氧化二砷(As2O3)在不同的诱导时间作用下对3种神经母细胞瘤(NB)细胞株分化与凋亡的作用。方法采用不同浓度(0、1、3、5、7μmol,/L)的As2O3诱导3组NB细胞株SK-N-SH、SK-N-BE2、SH-SY5Y,在同等条件下分别培养24、48、72h。采用荧光原位杂交技术、流式细胞术、细胞增殖毒性检测法,检测As2O3对3种NB细胞株的细胞生物学影响。结果5μmol/L As2O3诱导72h后,SK-N-BE2的MYCN基因扩增数量明显减少;相较于低浓度(1μmol/L)As2O3,随着浓度的增加,3组细胞增殖活力逐渐降低,SH-SYSY:24h(chisq=9.6667,P〈0.05),48h(chisq=9.6667,P〈0.05),72h(chisq:9.5128,P〈0.05);SK-N-SH:24h(chisq=10.3846,P〈0.05,),48h(chisq=8.6410,P〈0.05),72h(chisq=9.4615,P〈0.05),SK-N-BE2:24h(chisq=8.4359,P〈0.05),48h(chisq=8.6410,P〈0.05),72h(chisq=9.5455,P〈0.05);流式细胞仪检测结果显示,随着As:O,浓度的增加,与空白组相比,细胞早晚期凋亡率明显增加,凋亡率分别为1.6%(0μmol/L),3.8%(1μmol/L),6.1%(3μmol/L),10.4%(5μmol/L),40.2%(7μmol/L);细胞周期中G2/M期延长,细胞分裂受到抑制。结论1.As2O3对NB细胞株具有诱导凋亡,抑制细胞增殖的作用,呈剂量依赖性,不同类型的NB细胞株对As2O3敏感程度不一。2.SK-N-BE2细胞在As2O3诱导后,扩增的MYCN基因具有转阴趋势。3.经As2O3诱导后,3组NB细胞的细胞周期在S期及G2/M期受到阻滞,细胞核酸复制及细胞分裂受到抑制。Objective To identify the effect of arsenic trioxide ( As2 03 ) on the differentiation and apoptosis of different types of neuroblastoma(NB) cell lines. Methods The cell lines [ SK - N - SH, SK - N - BE2, SH - SY5 Y ] were induced with different concentrations ( 0 μmol/L, 1 p, mol/L, 3 μmol/L, 5 μmol/L and 7 /xmol/L) of arsenic trioxide for 24 h ,48 h ,72 h under the same conditions. The expression of MYCN gene was examined by fluorescence in situ hybridization assay in SK - N - BE2, cell proliferation, cell cycle and cell apoptosis were detected with cell counting kit -8 (CCK- 8 ) assay and flow cytometry. Results 5 μmol/L of As203 inhibited the expression of MYCN gene in SK - N - BE2 ; CCK - 8 assay indicated that As2 03 inhibited the proliferation of NB cell in a dose - and time - depen- dent manner,the cell proliferation was significantly suppressed compared with the low concentration (1 μ mol/L) after treated with As2 03 by 1 μmol/L, 3 μmol/L,5 μmol/L and 7 μmol/L in 24 h,48 h and 72 h, SH - SY5 Y : 24 h ( chisq = 9. 666 7, P 〈 0.05 ) ,48 h ( chisq = 9. 666 7, P 〈 0.05 ), 72 h ( chisq = 9.512 8, P 〈 0.05 ) ; SK - N - SH, 24 h ( chisq = 10.38,P 〈0. 054 6),48 h(chisq =8. 641 0,P 〈0.05) ,72 h(chisq =9. 461 5,P 〈0.05) ;SK -N -BE2:24 h ( chisq = 8. 435 9,P 〈 0.05 ) ,48 h ( chisq = 8. 641 0,P 〈 0. 05 ) ,72 h ( chisq = 9. 545 5, P 〈 0.05 ) ; compared with the control group, the As203 -treated cells showed increased apoptosis percentage, with the percentage of 1.6% (0 μmol/L) ,3.8% (1 μmol/L) ,6. 1% (3 μmol/L) ,10.4% (5 μmol/L) ,40.2% (7 μmol/L) ; the cell cycle was ar- rested at G2/M phase, which prevented cell division. Conclusions (1)As203 play an important role on the NB ceils proliferation, apoptosis which were dose -and time -dependent manner. (2)As2 03 can inhibit the expression of MYCN gene. (3)As2 03 also could block NB cell cycle at S and G2/M, and inhibit the cell nucleus replication
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