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时间:2020-04-17
《草苁蓉多糖提取物诱导人喉癌Hep2细胞凋亡的实验研究.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、陕西医学杂志2014年8月第43卷第8期947草苁蓉多糖提取物诱导人喉癌Hep2细胞凋亡的实验研究延安大学附属医院耳鼻喉科二病区(延安716000)张军张耀明△王正辉▲汪立摘要目的:探讨草苁蓉多糖提取物(BRP)对人喉癌Hep2细胞的抗瘤作用。方法:采用高通量色谱仪分析多糖提取物成分,流式细胞仪分析细胞周期及凋亡蛋白,westernblot检测细胞凋亡相关蛋白变化。结果:高通量色谱分析仪发现BRP成分单一,BRP对细胞的抑制率呈时间和浓度依赖性。细胞周期分析发现BRP使细胞滞留于G。/O期。与对照组相比,不同浓度的BRP(100
2、~400g/m1)明显诱导细胞的凋亡。Westernblot结果发现BRP作用后,pro—caspase一3,pro—caspase一8和pro—caspase一9蛋白分裂增加,同时死亡受体DR5和Bax表达增加,而Bcl一2表达减少。结论:研究发现BRP主要通过使Hep2细胞周期变化和凋亡来抑制细胞的生长,其途径主要包括线粒体内部途径和死亡受体外部途径来完成。主题词喉肿瘤@Hep2细胞细胞凋亡【中图分类号】R739.65【文献标识码】Adoi:10.3969/j.issn.1000—7377.2014.08.004Polvsa
3、ccharideOfboschniakiarossicainducesapoptosisonHep2cellsDepartmentofOtolaryngology,theAffiliatedHospitalofYah’anUniversity(Yan’an716000)ZhangJunZhangYaomingWangZhenghuietalABSTRACTObjective:Theaimofthisstudywastoexploretheanti-tumorpotentialofapolysaccharidei—solatedf
4、romBoschniakiarossica(BRP)inHep2humanlarynxsquamouscarcinomacells.Methods:Byanalyzingtheextractpolysaccharidesofhigh-throughputchromatography,cellcycleandapoptosiswereanalyzedbyflowcy—tometrytochangesinprotein,apoptosiswasdetectedbyWesternblotrelatedprotein.Results:H
5、ighperformancesize-exclusionchromatographyanalysisshowedthatBRPwasahomogeneouspolysaccharide.BRPsuppressedtheproliferationofHep2cellsinatime—anddose—dependentmanner.CellcycleanalysisrevealedthatexposuretOBRP(200Fg/m1)causedaG0/G1cellcyclearrestinHep2cells.Moreover,tr
6、eatmentwithBRPat100—400~g/mlfor24hinducedasignificantapoptosisHep2cellscomparedtOuntreatedcontrolcells,asdeterminedbyflowcytometrywithannexin-V/propidiumiodidedoublestaining.Additionally,BRPtreatmentpromotedthecleavageofpro~easpase一3,pro—caspase一8,andpro—caspase一9,co
7、upledwithincreasedexpressionofdeathreceptorDR5andBaxandreducedexpressionofBcl一2.Conclusions:Takentether,ourdatademonstratethatBRPshowspotentantitumoractivityinhumanlarynxsquamouscarcinoma,largelythroughinductionofG0/G1cellcyclearrestandapoptosis.Activationofbothmitoc
8、hondria—-mediatedanddeathreceptor-mediatedapoptosispathwaysisinvolvedinthecytotox、.icityofBRP.KEYWORDSLaryngealneoplasms@Hep2ceilsA
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