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1、··中国肺癌杂志2010年1月第13卷第1期ChinJLungCancer,January2010,Vol.13,No.1·基础研究·GRP78在肺腺癌细胞顺铂耐药中的作用吴晶王琪王佳瑞张黎川赵龙【摘要】背景与目的糖调节蛋白78(GRP78)在肺癌细胞中表达增高并与其对化疗药物VP-16的耐药性有关,而GRP78的表达与其对化疗药物顺铂的耐药性是否相关,研究较少。本研究旨在通过检测GRP78在人肺腺癌细胞SPCA-1中的表达及顺铂作用后的细胞生存率,研究GRP78在肺腺癌细胞顺铂耐药中的作用。方法依
2、据是否应用诱导剂A23187将细胞分为实验组和对照组,采用RT-PCR、Westernblot方法检测各组细胞中GRP78在核酸和蛋白水平的表达,利用MTT法测定细胞在顺铂作用下的生存率,分析GRP78在SPCA-1细胞顺铂耐药中的作用。结果A23187可以明显诱导SPCA-1细胞中GRP78在核酸和蛋白水平的表达,且其表达水平与A23187具有一定的浓度依赖性,MTT检测显示:实验组细胞生存率明显低于对照组,亦呈一定的A23187浓度依赖性。结论在人肺腺癌细胞SPCA-1中,诱导剂A23187可以诱导
3、GRP78核酸和蛋白水平的表达,其表达与肺癌细胞在顺铂作用下的生存率呈负相关,表明GRP78可提高SPCA-1细胞对顺铂的敏感性,与肺癌细胞化疗耐药有一定的相关性。【关键词】葡萄糖调节蛋白78(GRP78);肺肿瘤;顺铂;耐药性【中图分类号】R734.2DOI:10.3779/j.issn.1009-3419.2010.01.07TheRoleofGRP78ontheResistancetoCisplatininSPCA-1CellLine12222JingWU,QiWANG,JiaruiWANG,Li
4、chuanZHANG,LongZHAO12DepartmentofRespiratoryMedicine,theDalianNo.4PeopleHospital,Dalian116031,China;DepartmentofRespiratoryMedicine,theSecondHospitalofDalianMedicalUniversity,Dalian116031,ChinaCorrespondingauthor:QiWANG,E-mail:wqdmu@yahoo.com.cn【Abstract
5、】BackgroundandobjectiveTheexpressionlevelsofglucose-regulatedprotein78(GRP78)wereelevatedandcorrelatedwithresistancetochemotherapydrugVP-16inlungcancercells.However,littleisknownabouttherelationshipbetweenitsexpressionandresistancetocisplatininlungcancer
6、cells.TheaimofthisstudywastoinvestigatetheexpressionofGRP78undertheinductionofA23187anditssignificanceintheresistancetoanti-tumordrugscisplatininahumanlungcancerSPCA-1cellline.MethodsRT-PCRandWesternblotwereusedtoanalyzetheexpressionofGRP78atmRNAandprote
7、inlevelsinSPCA-1celllineinducedbyA23187atdifferentconcentrations(0,1,2,4,6µM).MTTwasusedtodeterminetheeffectofcisplationoncellsurvival.ResultsTheexpressionsofGRP78atbothmRNAandproteinlevelswereincreasedobviouslyinSPCA-1celllineinducedbyA23187,withamanner
8、ofdose-dependentofA23187toagreatdegree;MTTassayshowedthatthecellsurvivalrateoftheA23187-inducedgroupdecreasedsignificantlycomparetothecontrolgroup,alsowithaconcentration-dependentmannerofA23187.ConclusionTheexpressionofGRP