姜黄素对人鼻咽癌CNE-2细胞增殖及凋亡的影响

摘要

目的 探讨姜黄素对人鼻咽癌(NPC)CNE-2细胞增殖及凋亡的影响.方法 不同浓度(0、10、20、40、60 μmol/L)姜黄素处理NPC细胞株CNE-2,利用噻唑蓝(MTT)实验检测CNE-2细胞增殖活性,利用流式细胞仪检测CNE-2细胞周期及凋亡率,利用Hoechest33258荧光染色法观察细胞凋亡情况.结果 姜黄素可明显抑制CNE-2细胞增殖作用,且随姜黄素浓度增加,CNE-2细胞抑制率呈上升趋势(P＜0.05),姜黄素作用CNE-2细胞24、48、72 h的半抑制浓度(IC50)分别为(23.54±0.36)、(18.31±0.42)、(8.56±0.37)μmol/L,即姜黄素可明显抑制CNE-2细胞增殖作用,且呈现明显浓度、时间依赖性;流式细胞检测结果显示,0、10、20、40、60 μmol/L姜黄素处理CNE-2细胞,凋亡率随着姜黄素浓度增加而上升;荧光染色结果可见,CNE-2细胞未给予姜黄素处理,细胞呈圆形或者椭圆形,细胞核大小均匀一致,染色质分布均匀的淡蓝色荧光;10 μmol/L姜黄素处理CNE-2细胞24h后,细胞胞体缩小,细胞核染色质凝聚,呈颗粒状亮蓝色荧光;20 μmol/L姜黄素处理CNE-2细胞24 h后,细胞出现胞体缩小,细胞核浓缩、染色质不均匀,出现凋亡小体,甚至出现核碎裂;40和60 μmol/L姜黄素处理CNE-2细胞24 h后,细胞凋亡小体数量增多,出现大量核碎裂.结论 姜黄素对NPC细胞株CNE-2细胞增殖具有明显抑制作用,且促进CNE-2细胞凋亡.%Objective To investigate the effect of curcumin on proliferation and apoptosis of human nasopharyngeal carcinoma (NPC) cell line CNE-2.Methods The CNE-2 cells were treated by by different concentrations (0,10,20,40,60 μmol/L) of curcumin.The proliferation activity of CNE-2 cells was detected by MTT assay,the cell cycle and apoptosis rate of CNE-2 were detected by using the flow cytometry (FCM),and the apoptosis was observed by Hoechest33258 fluorescence staining.Results Curcumin could significantly inhibit the proliferation of CNE-2 cells,moreover which was increased with curcumin concentration increase,the inhibitory rate of CNE-2 cells showed an increasing trend (P＜0.05),the half inhibitory concentrations (IC50) of curcumin acting on CNE-2 cells at 24,48,72 h were (23.54 ± 0.36),(18.31 ± 0.42) and (8.56 ± 0.37) μmol/L respectively.Curcumin could significantly inhibit the proliferation effect of CNE-2 cells,showing the apparent concentration and time dependence.The FCM detection results showed that in treating CNE-2 cells by 0,10,20,40,60 μmol/L of curcumin,the apoptosis rate was increased with the curcumin concentration increase;the fluorescence staining results showed that CNE-2 cells without curcumin treatment were round or oval,the cell nucleis were uniform in size,chromatin distribution showed the homogeneous light blue fluorescence;after 24 h of 10 μmol/L curcumin treatment,the CNE-2 cell body was shrunk and cell nuclear chromatin was condensed,showing granular bright blue fluorescence;after 24 h of 20 μmol/L curcumin treatment,the cell body was shrunk,nuclear was condensed,chromatin was uneven,apoptotic bodies appeared,and even the nuclear fragmentation appeared;after 24 h of 40 μmol/L and 60 μmol/L curcumin treatment,the number of apoptotic cells was increased,a large number of nuclear fragmentation appeared.Conclusion Curcumin has a significant inhibitory effect on the proliferation of NPC cell line CNE-2,moreover promotes the apoptosis of CNE-2 cells.