调控sall4表达的mir-107及其与脑胶质瘤细胞增殖的关系-mir - 107 regulating sall 4 expression and its relationship with glioma cell proliferation.docx
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调控sall4表达的mir-107及其与脑胶质瘤细胞增殖的关系-mir - 107 regulating sall 4 expression and its relationship with glioma cell proliferation
AbstractMicroRNAscanregulategeneexpressionviainteractingwithtargetgene.Sall4wasdetectedsignificantlyup-regulatedinmanytumors,asanewoncogenetobelearned.Butthemechanismoftheregualationonitisnotclear.OurpreviousworkhasshownthatSall4wasup-regulatedinhumangliomatissues,andpredictedSall4wasthetargetgeneofhas-miR-107bybioinformaticsmethod.Usingaluciferasereportersystem,real-timeRT-PCRandwesternblot,SALL4wasidentifiedasnoveldirecttargetofmiR-107incells.TogainabetterunderstandingoftheregulationonSall4,wedetectedtheexpressionofmiR-107andSall4mRNAin40humangliomatissuesbyqRT-PCR.Theresultsturedoutthat30of40(75%)casesrevealedlessthan50%down-regulationbydetectedtheexpressionofmiR-107,and31of40(77.5%)casesrevealedmorethan50%up-regulationbydetectedtheexpressionofSall4.AnobviousinversecorrelationwasobservedbetweentheexpressionofmiR-107andSall4byanalysissoftware.ForcedexpressionofmiR-107suppressedcellproliferationbyMTTassayandananchorage-independentgrowthassayinSHG-44,U251andU87-MGcells.Inaddition,miR-107couldinduceapoptosisbyFACSandcaspase3/7activityassay.ThenudemicewereinjectedwithSHG-44cellswhichweretransfectedwithmiR-107mimicsintheirbacksideregion,andwefoundthattheproliferationabilityofthecellswasremarkablyreduced.ThentheapotosiswasdetectedinthethesectionoftumorsbyTUNELassay,whichshownthatforcedexpressionofmiR-107canasloinducecellapotosiscomparedwiththecontrolgroupinvivo.Toconclude,miR-107caninhibittheproliferationofgliomacellsbyinducingapotosisinvitroandvivo.Keywords:hsa-miR-107,Sall4,glioma,proliferation目录摘要IAbstractII第1章绪论11.1课题背景及研究的目的和意义11.1.1课题研究背景11.1.2课题研究目的和意义21.2国内外在该方向的研究现状及分析21.2.1原癌基因Sall4与多种肿瘤发生的关系31.2.2miRNA与脑胶质瘤的关系41.2.3miR-107与多种肿瘤发生的关系71.3技术路线9第2章材料与方法102.1实验材料102.1.1细胞系102.1.2载体及重组体102.1.3实验试剂与试剂配方102.1.4实验仪器142.1.5分析软件152.2实验方法与步骤152.2.1细胞培养及转染15qRT-PCR16Sall43UTR-pMIR-reportor质粒的构建192.2.4双荧光素酶报告载体系统的检测202.2.5Westernblot检测蛋白水平212.2.6MTT增殖曲线实验222.2.7软琼脂集落形成实验232.2.8细胞周期实验232.2.9细胞流式检测凋亡实验242.2.10细胞凋亡酶caspase3/7酶活性检测实验242.2.11裸鼠成瘤实验252.2.12TUNEL检测肿瘤组织细胞的凋亡情况252.
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