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时间:2020-05-24
《木犀草素联合顺铂诱导人类肝癌HepG2细胞凋亡及对C-jun氨基末端激酶信号通路的影响.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、·148·肿瘤研究与临床2014年3月第26卷第3期CancerResearchandClinic,March2014,Vo1.26,No.3·论著·木犀草素联合顺铂诱导人类肝癌HepG2细胞凋亡及对C-jun氨基末端激酶信号通路的影响徐珊玲熊冠泽【摘要】目的探讨木犀草素作为凋亡增敏剂增强顺铂诱导人类肝癌HepG2细胞凋亡的作用。方法将木犀草素与顺铂单独或联合处理HepG2细胞。采用Hoechst染色试剂盒检测细胞凋亡,分光光度法检测Caspase.3活性,乳酸脱氢酶(LDH)释放法检测细胞死亡情况,蛋白质印迹法检钡舜酸化C
2、-jun氨基末端激酶(JNK)及总JNK蛋白的表达情况。结果木犀草素能显著增强顺铂诱导的HepG2细胞Caspase.3活性以及细胞凋亡。不同浓度的木犀草素(0—20p~mol/L)与顺铂(10g/m1)联用后,联合组的细胞死亡率较各浓度单药处理组增加更为明显,最高达47.66%,各浓度单药处理和联合应用之间的细胞死亡率差异有统计学意义(F=535.48,P<0.01),联合处理的疗效优于单药应用。顺铂(10g/m1)组、木犀草素(20mol/L)单药处理组以及顺铂(10/m1)与木犀草素(20Ixmol/L)联合处理组的C
3、aspase3活性分别是阴性对照组的1.94倍、1.74倍和8.12倍,且联合处理后HepG2细胞内JNK信号通路得到持续活化。结论木犀草素进一步增强了顺铂介导的HepG2细胞内JNK信号通路的活化,从而增强顺铂诱导的人类肝癌HepG2细胞的凋亡。木犀草素有望作为凋亡增敏剂与抗肿瘤药物联合应用。【关键词】肝肿瘤;木犀草素;顺铂;凋亡;C—jun氨基末端激酶TheapoptosisofHepG2cellsandefectofC-junN-terminalkinasesignalingpathwayinducedbyluteol
4、incombinedwithcisplatinXuShanling,XiongGuanze.DepartmentofIntensiveCareUnit,SichuanCancerHospital,Chengdu610041,ChinaCorrespondingauthor:XiongGuanze,Email:scchgzx@163.corn【Abstract】ObjectiveToinvestigatetheincreasedcytotoxicityinducedbyluteolinandcisplatinCO—treatm
5、entandvalidateitsmechanism.MethodsHepG2cellswerepretreatedwithluteolinfor1hourorremaineduntreatedandfollowedbyexposuretocisplatin.CellswerestainedwithHoechst.andCaspase一3activitywasdetectedbyspectrophotometry.CelldeathwasdetectedbyLDHreleaseassay.PhosphatedC-junN—t
6、erminalkinase(JNK1andtotalJNK1weredetectedbyWesternblot.ResultsLuteolinsignificantlyenhancedCaspase一3activityandHepG2cellsapoptosisbycisplatin.ThecelldeathratesbyCO—treatmentwithdifferentconcentrationofluteolin(0-20I~mol/L)andcisplatin(10txg/m1)weremuchhigherthanci
7、splatinorluteolinalonetreatment.Combinedtreatmentofluteolin(2ot~mol/L)withcisplatinf10/xg/m1)killed47.66%ofHepG2cells.ThereweresignificantdifferencesoncelldeathbetweencombinationgroupandsinglereagentgroupfF:535.48.P8、glereagentgroup.TheCaspase一3activityofHepG2cellstreatedbyluteolin(20~mol/L),cisplatin(10~g]m1)orluteolin(20txmol/L)pluscisplatin(10~g/m1)were1.94
8、glereagentgroup.TheCaspase一3activityofHepG2cellstreatedbyluteolin(20~mol/L),cisplatin(10~g]m1)orluteolin(20txmol/L)pluscisplatin(10~g/m1)were1.94
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