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《地塞米松對(duì)順鉑誘導(dǎo)人肺腺癌細(xì)胞株凋亡的抑制作用及其機(jī)制-論文.pdf》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫(kù)。
1、四川大學(xué)學(xué)醫(yī)學(xué)版di)2013;44(6):902-906JSichuanUniv(MedSciEd)’地塞米松對(duì)順鉑誘導(dǎo)人肺腺癌細(xì)胞株凋亡的抑制作用及其機(jī)制*曹菲,張智慧△,吳萍,李力,黃建鳴四JII省腫瘤醫(yī)院腫瘤內(nèi)科(成都610041)【摘要】目的研究地塞米松(Dex)對(duì)順鉑(CDDP)引起的人肺腺癌細(xì)胞株SPCA/I凋亡的抑制作用及其分子機(jī)制探討。方法體外培養(yǎng)SPCA/I細(xì)胞,分別加入不同濃度Dex培養(yǎng)24h后,加人不同濃度CDDP繼續(xù)培養(yǎng)48h,采用二甲基溴化四氮唑藍(lán)(MTT)法檢測(cè)細(xì)胞存活率;流式細(xì)胞儀檢測(cè)細(xì)胞凋亡;用1/,mo
2、l/IDex刺激SPCA/I細(xì)胞,分別于lh、2h、4h、6h、12h采用RT—PCR技術(shù),檢測(cè)SPCA/I細(xì)胞中糖皮質(zhì)激素誘導(dǎo)的蛋白激酶1基因(SGK一1)和絲裂原活化蛋白激酶磷酸酶l(MKP—1)基因的表達(dá);用生物素標(biāo)記的抗糖皮質(zhì)激素受體(GR)抗體對(duì)SPCA/I細(xì)胞中GR行細(xì)胞免疫組化檢測(cè)。結(jié)果sPcA/I細(xì)胞經(jīng)Dex刺激后,對(duì)CDDP所致的抑制細(xì)胞生長(zhǎng)和凋亡呈抵抗作用(P<0.05)。Dex刺激后的SPCA/1細(xì)胞表達(dá)SGK一1上調(diào),在12h時(shí)表達(dá)達(dá)高峰,未檢測(cè)到MKP一1表達(dá);細(xì)胞免疫組化顯示SPCA/I細(xì)胞經(jīng)Dex刺激后GR表
3、達(dá)上調(diào),細(xì)胞內(nèi)GR數(shù)目高于對(duì)照組(P<0.05)。結(jié)論體外實(shí)驗(yàn)結(jié)果表明,Dex對(duì)CDDP引起的SPCA/I細(xì)胞凋亡有抑制作用。其分子機(jī)理可能是通過(guò)上調(diào)細(xì)胞內(nèi)GR數(shù)目,增強(qiáng)通路下游SGK1的表達(dá),從而產(chǎn)生抗凋亡作用?!娟P(guān)鍵詞】地塞米松肺癌順鉑凋亡PreliminaryStudyofApoptoticInhibitionandItsMolecularMechanismofDexamethasoneonCisplatin—inducedHumanLungAdenocarcinomaCellLineSPCA/ICA0Fei,ZHANGZhi—hu
4、i,UPing,LILi,HUANGJiang—ming.DepartmentoJ’MedicalOncology,SichuanProvincialCancerHospitalandInstitute,Chengdu61004l,China△Correspondingauthor,E—mai1:13881889731@139.com[Abstract]ObjectiveTostudytheapoptoticinhibitionanditsmolecularmechanismofdexamethasone(Dex)oncisplatin(
5、CDDP)一inducedhuman1ungadenoearcinomacells.MethodsThehumanlungadenocarcinomacellline,SPCA/I,waspre-culturedinvitrofor24hourswithDexindifferentconcentrationandthendifferentconcentrationofCDDPwasadded.Thecellswereculturedforanother48hours.Thesurviva1rateofthecellswasdetermin
6、edbyMTTcolorimetry.TheappototicrateofSPCA/Icellsmeasuredbyflowcytometer.Usinglumol/IDextostimulatetheSPCA/IcellsRNAsofthecellsatdifferenttimepoints(1h,2h,4h,6h,12h)wereextractedrespective1y.Semi—quantitativeRT_PCRtechnologywasusedtodetecttheexpressionoftheserumandglucocor
7、ticoid—inducedkinase(SGK一1)andmitogen—activatedproteinkinasephosphatase一1(MKP一1)inSPCA/Icells.Simultaneouslytheglucocorticoidreceptor(GR)oftheSPCA/Icelllinecellsweremeasuredbyusingbiotin-labeledanti—glucocorticoidreceptorantibodywithimmunohistochemistryassay.ResultsSPCA/I
8、cellsshowedresistancetoCDDP—。inducedapoptosiswhilepre—。culturedwithDexandtheresistanceintensityw