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ID:33399422
大小:3.96 MB
页数:46页
时间:2019-02-25
《microrna-451对人结肠癌细胞sw620裸鼠皮下种植瘤生长的抑制作用及机制》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、重庆医科大学硕士学位论文microRNA--451对人结肠癌细胞SW620裸鼠皮下种植瘤生长的抑制作用及机制姓名:刘娜娜申请学位级别:硕士专业:肿瘤学指导教师:罗治彬;李少林201205microRNA-451对人结肠癌细胞SW620裸鼠皮下种植瘤生长的抑制作用及机制摘、要目的:探讨microRNh-451(miR一451)对人结肠癌细胞系SW620裸鼠皮下种植瘤生长的影响并探讨其可能机制。方法:18只裸鼠随机分为3组,实验组(SW一620—451组)、阴性对照组(SW-620-NC组)、空白对照组(SW-620组),每组6只,分别皮下接种转染了miRNA一451
2、agomir的SW620细胞、转染阴性片段agomirNegativeControl的SW620细胞和不经处理的结肠癌SW620细胞,并每周两次于瘤体内分别注射miRNA一45lagomir、miRNA~451agomirNegativeControl片段及生理盐水。比较各组裸鼠皮下形成瘤体的大小并计算抑瘤率,接种四周后处死裸鼠取瘤体组织,用免疫组化法和Western-blotting法定性定量分析和比较肿瘤相关基因c—myc的表达。结果:各组裸鼠皮下接种肿瘤细胞6天后均有瘤体形成,成瘤率100%,实验组(SW一620-451组)瘤体生长速度明显低于其他两组(p<
3、0.05);时间终点为第30天时,实验组(SW一620-451组)裸鼠皮下种植瘤的体积为(0.95±O.13)cm3,阴性对照组(SW-620-NC组)为(2.25±0.50)cm3,空白对照组(Sw-620组)为(2.46±O.59)cm3;3实验组(SW一620—451组)瘤体体积显著小于其他两组体积(p4、:转染miR一451后可以抑制结肠癌细胞SW620裸鼠皮下移植瘤的生长,其机制可能与下调c-myc的表达有关。关键词:结直肠肿瘤;miR-451;动物实验;c-myc:4MICRO.RNA451INHIBITSGROWTHOFSUBCUTANEOUSIMPLANTATIONTUMOROFHUMANCOLORECTALCANCERINNUDEMICEANDTHEPRoBABLYMECHANISMABSTRACTObjecave:ToexploretheeffectsofmicroRNA45l(miR一451)onthegrowthofimplantedsubcuta5、neoustumorsinhumancolorectaltumor-bearingnudemice,andtoinvestigatetheprobablymechanismofmiR-451asanewtumorsuppressormV1VO·Methods:Eightynudemicewererandomizedinto3groups,SW.620.451group、SW-620-NCgroupandSW-620group,sixmiceseverygroup.Theanimalmodelofsubcutaneousimplantationtumorinnude6、micewasestablishedbycorrespondinginiectingof6X106SW.620.451cells(transfectedwithmiR一451agomir)、SW-620_NC(transfectedwithagomirNonsenseControlsequence)cellsandSW一620cellssubeutaneously.ThemiceofthreegroupswererespectivelyinjectedwithmiRNA451agomir,miRNA451agomirNonsenseControlagorniraI7、ldsalinetwiceaweek.Comparethetumorgrowthineachgroupandcalculatemet吣oriI“bitionrate.Themicewaskilledin4weeks.Theexpressionof5c—nlycineach铲oupwereexaminedbyi眦unohistochemis乜yandWestern.blottingrespectively.Results:Everynudemicehastumorformationafter6daysofsubcutanecIusinoculationwithatu8、morfo
4、:转染miR一451后可以抑制结肠癌细胞SW620裸鼠皮下移植瘤的生长,其机制可能与下调c-myc的表达有关。关键词:结直肠肿瘤;miR-451;动物实验;c-myc:4MICRO.RNA451INHIBITSGROWTHOFSUBCUTANEOUSIMPLANTATIONTUMOROFHUMANCOLORECTALCANCERINNUDEMICEANDTHEPRoBABLYMECHANISMABSTRACTObjecave:ToexploretheeffectsofmicroRNA45l(miR一451)onthegrowthofimplantedsubcuta
5、neoustumorsinhumancolorectaltumor-bearingnudemice,andtoinvestigatetheprobablymechanismofmiR-451asanewtumorsuppressormV1VO·Methods:Eightynudemicewererandomizedinto3groups,SW.620.451group、SW-620-NCgroupandSW-620group,sixmiceseverygroup.Theanimalmodelofsubcutaneousimplantationtumorinnude
6、micewasestablishedbycorrespondinginiectingof6X106SW.620.451cells(transfectedwithmiR一451agomir)、SW-620_NC(transfectedwithagomirNonsenseControlsequence)cellsandSW一620cellssubeutaneously.ThemiceofthreegroupswererespectivelyinjectedwithmiRNA451agomir,miRNA451agomirNonsenseControlagorniraI
7、ldsalinetwiceaweek.Comparethetumorgrowthineachgroupandcalculatemet吣oriI“bitionrate.Themicewaskilledin4weeks.Theexpressionof5c—nlycineach铲oupwereexaminedbyi眦unohistochemis乜yandWestern.blottingrespectively.Results:Everynudemicehastumorformationafter6daysofsubcutanecIusinoculationwithatu
8、morfo
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