資源描述:
《miR-130a對(duì)卵巢癌A2780細(xì)胞順鉑耐藥性的影響及其機(jī)制的研究-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JS川i大學(xué)學(xué)哿d醫(yī)學(xué)E版di2。13;44(6):865-870chuanUniv/MedSciEdi)?一,。。、●’miR一130a對(duì)卵巢癌A2780細(xì)胞順鉑耐藥性的影響及其機(jī)制的研究李寧蔚,王紅靜△,楊凌云,賈西彪,陳岑,王雪四川大學(xué)華西第二醫(yī)院婦產(chǎn)科(成都610041)【摘要】目的探討miR一130a表達(dá)的改變對(duì)卵巢癌A2780細(xì)胞(包括順鉑敏感細(xì)胞株A2780s和耐藥株A2780/DDP)順鉑耐藥性的影響及其機(jī)制。方法將A2780s、A2780/DDP細(xì)胞各分為4組,分別予以單純脂質(zhì)體處理、
2、轉(zhuǎn)染陰性對(duì)照小RNA、miR一130a模擬物(可使miR一130a表達(dá)增加)、miR一130a抑制物(降低miR一130a表達(dá))處理,MTS法檢測(cè)各組細(xì)胞增殖情況和對(duì)順鉑的耐藥性,RT—PCR、Westernblot法檢測(cè)未處理和處理后細(xì)胞多耐藥基因1(MDR1)、抑癌基因(PTEN)mRNA和蛋白的表達(dá)。結(jié)果A2780/DDP細(xì)胞MDR1mRNA和MDR1的表達(dá)產(chǎn)物P_糖蛋白(P—gP)的表達(dá)高于A2780s細(xì)胞(P<0.05),而PTENmRNA及蛋白的表達(dá)在兩者間差異無(wú)統(tǒng)計(jì)學(xué)意義上調(diào)miR一130a
3、的表達(dá)對(duì)A2780s和A2780/DDP細(xì)胞的增殖無(wú)直接影響,但能增強(qiáng)其對(duì)順鉑的耐藥性,且提高M(jìn)DR1mRNA和P—gP表達(dá)水平;下調(diào)miR-130a的表達(dá),同樣不影響細(xì)胞的增殖,但增強(qiáng)其對(duì)順鉑的敏感性,并可降低MDR1mRNA和P—gP的表達(dá),提高PTEN蛋白的表達(dá)。結(jié)論miR一130a抑制物通過(guò)上調(diào)PTEN蛋白和下調(diào)P—gP的表達(dá)來(lái)逆轉(zhuǎn)卵巢癌A2780細(xì)胞系對(duì)順鉑的耐藥性。miR一130a有望成為耐藥性卵巢癌基因治療的新靶點(diǎn)?!娟P(guān)鍵詞】卵巢癌順鉑耐藥miR一130a抑癌基因(PTEN)多耐藥基因1(M
4、DR1)P一糖蛋白(P—gP)RegulatoryEffectsandAssociatedMechanismsofmiR-130aMoleculesonCisplatinResistanceinOvarianCancerA2780CellLinesLINing—wei,WANGHong—jing,YANGLing—yun,JIAXi—biao,CHENCen,WANGXue.DepartmentofObstetricsandGynecology,WestChinaSecondHospital,Sichua
5、nUniversity,Chengdu610041,China△Correspondingauthor,E—mai1:whjscdx@163.com[Abstract]ObjectiveTodeterminetheregulatoryeffectsandassociatedmechanismsofmiR一130aoncisplatinresistanceinovariancancerA2780celllines(includingcisplatinsensitiveA2780sanditsresistan
6、tA2780/DDPcells).MethodsA2780sandA2780/DDPcellsweredividedintofourgroups,andtreatedwithlipo2000(Lip),miR—negative(miR—NC)control,miR一130a—mimics(miR一130a—MincreasingtheexpressionofmiR一130aandtheagent),andmiR一130a—inhibitor(miR一130a—IdownregulatingmiR一130a
7、expression),respectively.TheproliferationofcellsandtheirsensitivitytocisplatinweredetectedbyMTTassay.RT—PCRandwesternblotwereperformedtoexaminethelevelsofMDR1.PTENmRNAandproteins.ResultsTheexpressionsofMDR1mRNAandP—gPintheA2780/DDPcellsweresignificantlyhi
8、gherthanthoseintheA2780scells.However,nodifferencesintheexpressionsofPTENmRNAandproteinsweredetectedbetweenthetwocelllines.OverexDressionsofmiR-130ahadnoeffectoncellproliferation,butincreasedtheresistanceofthecellst