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1、YB1表達(dá)對乳腺癌細(xì)胞遷移和侵襲能力的影響作者:楊靖許文林李娟弓晉靈吳曉君陳巧云王法春【摘要】 目的:觀察Y盒結(jié)合蛋白1(YB1)對腫瘤細(xì)胞遷移和侵襲能力的影響。方法:通過脂質(zhì)體介導(dǎo)的方法將YB1shRNA重組載體轉(zhuǎn)染入人類乳腺癌MCF7細(xì)胞,經(jīng)G418篩選及克隆化培養(yǎng)后獲得穩(wěn)定轉(zhuǎn)染株。運(yùn)用RTPCR和蛋白質(zhì)印跡方法檢測MCF7細(xì)胞中YB1mRNA和YB1蛋白的表達(dá)水平,運(yùn)用劃痕實(shí)驗(yàn)和Transwell小室法檢測細(xì)胞運(yùn)動、遷移和侵襲能力的變化,同時(shí)運(yùn)用RTPCR和蛋白質(zhì)印跡方法檢測細(xì)胞中MMP2的表達(dá)水平,并用明膠酶譜法檢測MMP2蛋白的活性。結(jié)果:穩(wěn)定
2、轉(zhuǎn)染YB1shRNA的細(xì)胞中YB1的表達(dá)明顯低于轉(zhuǎn)染隨機(jī)片段的細(xì)胞和未轉(zhuǎn)染組細(xì)胞,且細(xì)胞的運(yùn)動、遷移和侵襲能力以及MMP2的表達(dá)及活性也較后兩組細(xì)胞明顯下降。轉(zhuǎn)染隨機(jī)片段的細(xì)胞和未轉(zhuǎn)染組細(xì)胞間無明顯差異。結(jié)論:YB1shRNA可以沉默乳腺癌MCF7細(xì)胞中YB1的表達(dá),并降低細(xì)胞的遷移和侵襲能力以及MMP2的表達(dá)及活性?!娟P(guān)鍵詞】Y盒結(jié)合蛋白1;MCF7;shRNA;遷移和侵襲能力;MMP2 ?。跘bstract]Objective:TostudytheeffectsofYbox13bindingprotein1(YB1)ontheinvasiveness
3、andmigrationcapabilityofbreastcancercells.Methods:TherecombinanteukaryoticexpressionplasmidincludingYB1shRNAwasintroducedintoMCF7cellsbylipofectaminemediationandthecelllinewithstableexpressionofYB1wasobtainedbyG418screeningandcolonyculture.TheexpressionlevelsofYB1mRNAandproteinweredetermin
4、edbyRTPCRandWesternblotting.Themobility,invasivenessandmigrationcapabilityofcellswereevaluatedbyusingwoundhealingassayandTranswellchambermodelinvitrowhiletheexpressionlevelsofMMP2mRNAandproteinweredeterminedbyRTPCRandWesternblotting,andtheactivityofMMP2proteinwasdetectedbyGelatinZymography
5、.Results:TheexpressionofYB1inthecellstransfectedwithYB1shRNAwasmuchlessthanthecellstransfectedwithrandomfragmentandthecontrolgroup.Themobility,invasiveness,migrationcapabilityandtheexpressionofMMP2aswellastheactivityofMMP2proteinofthecellstransfectedwithYB1shRNAweremuchlowerthantheothertw
6、ogroupswhilethedifferencesbetweentheothertwogroupswerenotsignificant.Conclusion:TheinterferenceofYB1withYB1shRNAinbreastcancerMCF7cellscansuppresstheexpressionofYB1andtheinvasivenessandmigration13capabilityofcells,anddecreasetheexpressionofMMP2andtheactivityofMMP2protein.?。跭eywords]Ybox
7、bindingprotein1;MCF7;shRNA;invasivenessandmigrationcapability;MMP2 Y盒結(jié)合蛋白1(Yboxbindingprotein1,YB1)是Y盒蛋白家族成員之一,廣泛分布于原核與真核生物,它參與多種生命活動過程,研究發(fā)現(xiàn)YB1與人類惡性腫瘤關(guān)系非常密切,在部分類型的腫瘤中表達(dá)量偏高,已證實(shí)YB1異常表達(dá)的腫瘤類型有前列腺癌、乳腺癌、肺癌等[1],尤其在前列腺癌[2]和乳腺癌[3]中,YB