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《地塞米松對順鉑引起的人肺腺癌細(xì)胞spca1凋亡的抑制作用及其分子機(jī)制的初步探討》由會員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、摘要地塞米松對IIl頁,車fl引起的人肺腺癌細(xì)胞SPC-A1凋亡的抑制作用及其分子機(jī)制的初步探討曹菲-7曰F導(dǎo)師:張智慧教授廣西醫(yī)科大學(xué)目的:研究地塞米松(DEX)對順鉑(CDDP)引起的人肺腺癌細(xì)胞SPC—A1凋亡的抑制作用及探討其初步的分子機(jī)制。方法:采用人肺腺癌細(xì)胞SPC-A1,分另JJ/Jn入不同濃度的DEX體外誘導(dǎo)培養(yǎng),24小時后加入不同濃度的CDDP繼續(xù)培養(yǎng)48小時,用MTT法檢測細(xì)胞的存活率;再用1umol/LDEX刺激SPC-A1細(xì)胞,分別于lhr、2hr、4hr、6hr、12hr提取細(xì)胞的總RNA:采用半定量RT-PCR技術(shù),
2、檢測SPC-A1細(xì)胞中的血清/糖皮質(zhì)激素一誘導(dǎo)激酶(SGK-1)和有絲分裂原蛋白激酶(MKP-1)的表達(dá):同時用生物素標(biāo)記的抗糖皮質(zhì)激素受體(GR)抗體對SPC-A1細(xì)胞行免疫組化染色來檢測GR的表達(dá)。結(jié)果:SPC-A1細(xì)胞經(jīng)DEX誘導(dǎo)后,對CDDP所致的凋亡有抵抗作用并與DEX濃度呈劑量依賴關(guān)系。DEX刺激后的SPC-A1細(xì)胞表達(dá)SGK一1,在12hr時表達(dá)達(dá)高峰:細(xì)胞免疫組化顯示SPC-A1細(xì)胞經(jīng)DEX刺激后GR上調(diào),細(xì)胞內(nèi)GR表達(dá)的陽性細(xì)胞數(shù)明顯高于對照組;沒有檢測到IdKP—l表達(dá)。結(jié)論:DEX對CDDP引起SPC-A1細(xì)胞的凋亡有抑制
3、作用??赡艿姆肿訖C(jī)理是通過上調(diào)細(xì)胞內(nèi)GR表達(dá),上調(diào)其通路下游抗凋亡蛋白SGK-1的表達(dá),導(dǎo)致SPC-A1細(xì)胞產(chǎn)生抗凋亡作用。ABSTRACTPreliminarystudyofapoptoticinhibitionanditsmolecularmechanism0ldexametnasoneonClSDiatln-inducedIiumanInngl●J●1·●■●·■●-ladenocarcinomacellSPC.AlCA0FeiSupervisedby:ProfessorZHANGZhi-huiGuangxiMedicalUniversi
4、tyABSTRACTobjective:Toinvestigatetheinhibitionefficacyandmolecularmechanismofdexamethasone(DEX)onapoptosisofhumanlungadenocarcinomacellSPC—A1inducedbycisplatin(CDDP).Methods:SPC—·A1cellswaspre·-culturedinvitrofor24hourswithDEXindifferentconcentrationsandthenCDDPwasaddedandth
5、ecellswereculturedforanother48hours.thenthesurvivalratesofthecellsdeterminedbyMTT.SPC-A1cellswerestimulatedby1pmol/LDEX,andthentotalRNAwereextractedrespectivelyatlhr,2hr,4hr,6hr,12hr.111eexpressionoftheserum/glucocorticoid-inducedkinase(SGK-1)andmitogen—activatedproteinkinas
6、ephosphatase一1(MKP—1)inSPC-AIcellswasdetectedbysemi·quantitativeRT-PCRtechnology.Theexpressionofglucocorticoidreceptor(GR)inSPC·AIcellsWasmeasuredbyimmunohistochemistry(IHC)謝mantibodyofbiotin·labeledanti·GR.Theresults:SPC—AlcellsshowedresistancetoCDDP—inducedapoptosiswhenpre
7、-culturedDEX.a(chǎn)ndtheresistanceintensitywasDEXconcentration·dependent.111eSPC—A1cellsstimulatedbyDEXexpressedSGK-1whichpeakleveloccurredat12hr.Up-regulatedexpressionofGRinSPC-A1cellsstimulatedbyDEXWasdetectedbyIHC.111enumbercellsexpressingGRinSPC·A1cellswassignificantlyhighert
8、hanthatthecontrolgroup.ButtheexpressionofMKP·lWasnotdetectedlABSIRAClConclu