欢迎来到天天文库
浏览记录
ID:25746895
大小:62.50 KB
页数:11页
时间:2018-11-22
《survivin反义寡核苷酸逆转顺铂诱导的人肺腺癌细胞凋亡耐受作用论文》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、survivin反义寡核苷酸逆转顺铂诱导的人肺腺癌细胞凋亡耐受作用论文【摘要】目的探讨survivin反义寡核苷酸逆转人肺腺癌细胞对顺铂诱导的细胞凋亡耐受的效应。方法1.常规体外培养A549/CDDP细胞,以脂质体包裹的survivin反义寡核苷酸(ASODN)体外转染细胞。2.采用二苯胺反应法(DPA)测定DNA片段化、激酶法检测Caspase3酶活性及流式细胞术检测细胞凋亡率(AI),评价细胞凋亡程度。3.采用MTT法测定细胞存活率和生长抑制率,计算半效抑制浓度(IC50)及耐药倍数(RI)。结果1.单用ASODN转染组DNA片段化比率、细胞凋亡率和Caspa
2、se3相对活性分别增高至(43.55±6.07)%、(34.03±2.25)%和1.1298±0.2502,和各对照组相比较,均有显著性变化(P0.01);而ASODN和CDDP联用组上述凋亡指标增高更为明显,分别达(76.73±2.04)%、(65.85±5.47)%和1.6805±0.2758(P0.05)。2.转染组A549/CDDP细胞生长抑制显著,单用转染组和联合CDDP组生长抑制率分别增高达59.3%和83.7%(P0.05)。3.ASODN转染后CDDP对细胞IC50由(225.03±10.59)μmol/L减低至(158.84±4.256)μmol
3、/L.freelilyandinhibitorapoptosisfamilyproteins(IAPs),canresultininhibitionofapoptosisinducedbychemotherapyagentsandtherebyconfertodrugresistanceinmalignancies.Regulationofthosegeneexpressionsmayreversetheapoptosisresistancetochemicalagents.Inthepresentstudy,anlungadenocarcinomaA549/CD
4、DPcelllinestoexploreanlungadenocarcinomacells.MethodsA549/CDDPcelllinesedium.survivinASODNmediatedbycytofectininedbyDiphenylamineassay(DPA),caspase3colorimetricassayandfloetry.3(4,5dimethylthiazol2yl)2,5diphenyltetrazoliumbromide(MTT)assayedtodetectthecellviability,halfmaximumi
5、nhibitoryconcentration(IC50)andcisplatinresistantindex(RI)entation,apoptoticindexandCaspase3activityol/Lcisplatincausedfarmoreobviousapoptoticalterationsinthecells,ofentation,AIandCaspase3activityaximuminhibitoryconcentrationofcisplatin225.03±10.59μmol/Lto158.84±4.256μmol/L,11.9to8.3
6、9.Nonsenseoligodeoxynucleotides(NSODN)andliposomehadnoeffectonthecells(P0.05).ConclusionTransfectionofantisenseoligodeoxynucleotidestargetingsurvivingenecanreducetheapoptosisthreshold,thereaftertogreatextentreverseapoptoticresistanceinducedbycisplatinincisplatinresistanthumanlungaden
7、ocarcinomainvitro.Keya公司。survivinASODN及无义链(NODN)由上海生物工程有限公司合成。Caspase3试剂盒为BioVision公司产品。RNAseA为GIBCO公司产品。余均为国产分析纯试剂。1.3细胞培养人肺腺癌敏感细胞系A549和耐顺铂细胞亚系A549/CDDP培养于含10%新生小牛血清的RPMI1640培养液中,每毫升培养液含青霉素/链霉素均为100U,用5%Na2CO3调节PH值为7.2~7.6,置37℃、5%CO2、饱和湿度的培养箱中培养,每2~3天用0.25%的胰蛋白酶消化传代。1.4体外细胞转染预试验转
此文档下载收益归作者所有