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ID:33398381
大小:2.98 MB
页数:38页
时间:2019-02-25
《全反式维甲酸对人肺腺癌a549细胞放射敏感性的影响》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全反式维甲酸对人肺腺癌A549细胞放射敏感性的影响姓名:陈诚申请学位级别:硕士专业:肿瘤学指导教师:陈晓品;吴永忠201205全反式维甲酸对人肺腺癌A549细胞放射敏感性的影响摘要目的:研究全反式维甲酸(舢1.transretinoicacid,ATRA)对体外培养的人肺腺癌A549宝N胞的放射敏感性的影响,并探讨其可能的作用机制。方法:对数生长期的A549宝N胞,分为对照组、单纯ATRA组、单纯照射组、联合组(ATRA+照射组)。MTT法检测细胞的生长抑制率并筛选ATRA的最佳实验浓度;采用克隆形成
2、实验分析细胞的放射敏感性;流式细胞术检测各组的细胞周期及凋亡;RT-PCR法检测各组血管内皮生长因子VEGFmRNA表达;ELISA法检测各组细胞上清液中VEGF含』i里O结果:选择10岬ol/L的ATRA的作为最佳实验浓度;在一定程度上,ATRA可增加A549细胞的放射敏感性;单纯ATRA组的Go/Gl期比例较对照组明显增加(P3、A对A549细胞具有放射增敏作用,其作用机制可能与ATRA对A549宝m胞的增殖抑制、诱导细胞周期的再分布、诱导凋亡和肿瘤细胞VEGF的表达下调有关。关键词:非小细胞肺癌;全反式维甲酸;放射敏感性EFFECToFALL.TRANSRETINoICACIDoNRADIOSENSITIVITYOFLUNGCANCERCELLLD叮EA549ABSTRACTObjective:Toinvestigatetheradiosensitiveeffectofall—transretinoicacid(ATRA)onlungcancerc4、elllineA549culturedinvitroanditspossiblemechanism.Methods:TheA549cellsinthelogarithmicgrowthphaseweredividedintofourgroups:controlgroup,ATRAgroup,radiationgroup,combinationgroup(ATRAcombinedwithradiation).MTTassaywasusedtodetectthegrowthinhibitionrateandtofurtherfi5、lteroutthebestexperimentalconcentrationofATRA.Theradiosensitiveeffectwasdetectedbycloneformationtest.Thecellcycleandapoptosiswasmeasuredbyflowcytometry.TheexpressionofVEGFmRNAwasdetectedbyRT-PCR.TheVEGFvaluesinthecellsupematantweredetectedbyELISAResults:Theoptimald6、oseofATRAwas10umol/L.ATRACanenhancetheradiosensitivityofA549cells.TheproportionofGo/GlphaseinATRAgroupwassignificantlyincreasedcomparedwiththatincontrolgroup(P<0.05);statisticdifferencesinapoptosisratewereobservedbetweenATRAgroupandcontrolgroup(P7、nsofVEGFmRNAweresignificantlyreducedincombinationgroupcomparedwiththoseinradiationgroup(P<0.05).Thelevelsinthesupematantofcombinationgroupweresignificantlydecreasedcomparedwiththoseinradiationgroup(P8、ityofA549cells.ThemechanismmayberelatedwiththedirectinhibitionofATRAonA549cells,redistributionoftheinducingcellcycle,inducementoftheapoptosisandd
3、A对A549细胞具有放射增敏作用,其作用机制可能与ATRA对A549宝m胞的增殖抑制、诱导细胞周期的再分布、诱导凋亡和肿瘤细胞VEGF的表达下调有关。关键词:非小细胞肺癌;全反式维甲酸;放射敏感性EFFECToFALL.TRANSRETINoICACIDoNRADIOSENSITIVITYOFLUNGCANCERCELLLD叮EA549ABSTRACTObjective:Toinvestigatetheradiosensitiveeffectofall—transretinoicacid(ATRA)onlungcancerc
4、elllineA549culturedinvitroanditspossiblemechanism.Methods:TheA549cellsinthelogarithmicgrowthphaseweredividedintofourgroups:controlgroup,ATRAgroup,radiationgroup,combinationgroup(ATRAcombinedwithradiation).MTTassaywasusedtodetectthegrowthinhibitionrateandtofurtherfi
5、lteroutthebestexperimentalconcentrationofATRA.Theradiosensitiveeffectwasdetectedbycloneformationtest.Thecellcycleandapoptosiswasmeasuredbyflowcytometry.TheexpressionofVEGFmRNAwasdetectedbyRT-PCR.TheVEGFvaluesinthecellsupematantweredetectedbyELISAResults:Theoptimald
6、oseofATRAwas10umol/L.ATRACanenhancetheradiosensitivityofA549cells.TheproportionofGo/GlphaseinATRAgroupwassignificantlyincreasedcomparedwiththatincontrolgroup(P<0.05);statisticdifferencesinapoptosisratewereobservedbetweenATRAgroupandcontrolgroup(P7、nsofVEGFmRNAweresignificantlyreducedincombinationgroupcomparedwiththoseinradiationgroup(P<0.05).Thelevelsinthesupematantofcombinationgroupweresignificantlydecreasedcomparedwiththoseinradiationgroup(P8、ityofA549cells.ThemechanismmayberelatedwiththedirectinhibitionofATRAonA549cells,redistributionoftheinducingcellcycle,inducementoftheapoptosisandd
7、nsofVEGFmRNAweresignificantlyreducedincombinationgroupcomparedwiththoseinradiationgroup(P<0.05).Thelevelsinthesupematantofcombinationgroupweresignificantlydecreasedcomparedwiththoseinradiationgroup(P8、ityofA549cells.ThemechanismmayberelatedwiththedirectinhibitionofATRAonA549cells,redistributionoftheinducingcellcycle,inducementoftheapoptosisandd
8、ityofA549cells.ThemechanismmayberelatedwiththedirectinhibitionofATRAonA549cells,redistributionoftheinducingcellcycle,inducementoftheapoptosisandd
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