Livin基因siRNA慢病毒表达载体的构建及其对喉癌细胞HEP-2增殖的影响
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ConstructionofLivingenesiRNA lentiviralvectoranditsinfluenceonproliferationofHEP2 FENGJun1,LILi2 ,YANGJiumei1,PENGTao1(1DepartmentofENT,SecondClinicalMedicalCollegeofNorthSichuanMedical College,NanchongCentralHospital,Nanchong637000,China;2DepartmentofPathology,NorthSichuanMedicalCollege;Corre spondingauthor,Email:fjlx8888@163.com) Abstract: Objective ToconstructandidentifylentivirusvectorofLivingenesiRNAandinvestigateitseffectontheproliferationof HEP2cells. Methods LivingenesequenceswereobtainedfromGeneBank,andthreesiRNAtargetsequencesweredesigned.After MluⅠ andClaⅠ doubledigestion,thelentivirusexpressionvectorpLenORTHM wascloned.AftersiRNA sequencesweretrans formedintothecompetentbacteriaDH5alpha,thecandidatecloneswereidentifiedbyDNAsequencing.UsingEcoRⅠ andXbaⅠ doubleenzymedigestionandsequencingpositiveclone,therecombinantplasmidweretransfectedinto293Tcellsbyliposome2000. Thenthe293TcellsandHEP2cellswereinfectedwiththerecombinantplasmid.TheeffectofLivinsiRNA ontheproliferationof HEP2wasdetectedbyfluorescencequantitativePCR.WesternblotwasusedtoanalyzetheLivinproteinexpressioninSH2R,SH2 FandNCinlaryngealsquamouscellcarcinoma. Results ThelentiviralexpressionvectorpLenORTHMLivinsiRNAwassuccessful lyconstructedandtransfectedinto293Tcells.Stronggreenfluorescencewasobservedinthe293Tcellsunderfluorescentmicroscope aftercotransfectionwiththeplasmidsoflentiviralvectorinthe293TcellsandHEP2cells,whichwasmainlyexpressedonthecell membrane.The293TcellsandHEP2cellsinfectedbytheconcentratedvirussolutionhadgreenfluorescenceexpression.Therelative expressionofLivinproteinwasthelowestinSH2R[(1231±443)%],andtherewasasignificantstatisticaldifferencebetween SH2RandSH2F,NC(P<005). Conclusion ThelentiviralvectorofLivinsiRNAhasbeensuccessfullyconstructedandidenti fied.ThesiRNAcanreducetheexpressionofLivinproteininlaryngealsquamouscellcarcinoma. Keywords: Livingene; HEP2cells; siRNA; lentiviralvector; cellproliferation
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JShanxiMedUniv,Sep2018,Vol49No9
Livin基因 siRNA慢病毒表达载体的构建及其对喉癌细胞 HEP2增殖的影响
冯 俊1,李 丽2 ,杨久梅1,彭 涛1 (1 川北医学院第二临床医学院耳鼻咽喉科,南充市中心医院耳鼻咽喉科,南充
637000;2 川北医学院病理学教研室;通讯作者,Email:fjlx8888@163.com)
摘要: 目的 构建及鉴定 Livin基因 siRNA慢病毒表达载体并观察其对喉癌细胞 HEP2增殖的影响。 方法 从基因库获 得 Livin基因序列,设计 3段 siRNA序列;经 MluⅠ和 ClaⅠ双酶切后克隆入慢病毒表达载体 pLenORTHM,构建 pLenORTHM LivinsiRNA重组质粒,将其转化感受态细菌 DH5α,对阳性克隆进行筛选后,用 EcoRⅠ和 XbaⅠ双酶切及测序鉴定正确后用 脂质体转染 293T细胞包装病毒颗粒,感染 293T细胞及 HEP2细胞,用荧光定量 PCR检测其对 HEP2增殖的影响。 结果 慢病毒表达载体 pLenORTHMLivinsiRNA被成功构建;转染 293T细胞组装病毒液有绿色荧光,并主要表达在细胞膜上;浓缩 后的病毒液感染 293T细胞及 HEP2细胞均有绿色荧光表达。SH2R组的 Livin蛋白相对表达量最低为(1231±443)%; SH2R组与 SH2F、NC组比较,差异有统计学意义(P<005)。 结论 成功构建了 Livin基因 siRNA慢病毒载体;HEP2细 胞 Livin蛋白表达受到抑制。 关键词: Livin基因; 喉癌细胞; siRNA; 慢病毒载体; 细胞增殖