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ID:34683324
大小:1.62 MB
页数:30页
时间:2019-03-09
《曲妥珠单抗对her2高表达胃癌细胞株的放疗增敏作用》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、曲妥珠单抗对HER2高表达胃癌细胞株的放疗增敏作用摘要目的:研究曲妥珠单抗对HER2高表达人胃癌细胞NCI-N87的放疗增敏作用。方法:应用免疫组化法检测HER2蛋白在胃癌NCI-N87细胞中的表达;荧光免疫杂交法(FISH)检测HER2基因在NCI—N87细胞中的扩增情况;CCK8法筛选曲妥珠单抗杀伤NCI-N87细胞的浓度,一般选取<20%的抑制浓度(20%inhibitionconcentration,2、、4、6、8Gy),利用克隆形成实验计算胃癌细胞存活率,拟合细胞存活曲线,计算放射的生物学参数;分为空白对照组、药物组、外照射组(2Gy外照射)、联合组(曲妥珠单抗+2Gy外照射),以流式细胞仪检测各组细胞凋亡率。结果:免疫组化法测得在胃癌NCI-N87细胞中HER2蛋白的表达主要分布在细胞膜,为棕褐色颗粒状,NCI-N87为HER2蛋白2+。荧光免疫杂交法检测NCI—N87细胞HER2/CEPl7>2,存在HER2基因扩增。CCK8法筛选的曲妥珠单抗放疗增敏浓度为lOug/ml。加药组D。、Dq、N、SF2均小于对照3、组,NCI—N87胃癌细胞在曲妥珠单抗lOug/m1剂量下增敏比(SER)为1.2453。曲妥珠单抗或照射组均可增加凋亡率,尤以联合组凋亡率最高(P(O.05)。结论:曲妥珠单抗可提高HER2高表达人胃癌细胞的放疗敏感性,并促进凋亡。曲妥珠单抗有望成为HER2高表达胃癌的放疗增敏剂。硕士研究生韩真真(肿瘤学)指导教师袁胜利副教授关键词:曲妥珠单抗;胃癌;人表皮生长因子受体2;放疗增敏EffectofTrastuzumabonRadiosensitivityofHER2o、。GastricCancerLineAbstra4、ctObjective:TostudytheradiosensifivityoftrastuzumabonHER2overexpressedgastriccancercellNCI-N87.Methods:ToidentifytheexpressionofHER2ingastriccancercell谢thimmunohistochemical(IHC)methodandthefluorescenceinsituhybridization(FISI-I)method;Theinhibitoryeffectoftrasm5、zumaboncellproliferationwasmeasuredbyCCK8assay,toselecttheIC20concentrationoftrastuzumabonNCI-N87cell;Acorrdingtoiftrastuzumabwasusedornot,groupsweredividedintothecontrolgroupandthegroupgivenmedicine,tlleywerebothgivenfivedifferentdosesofextemalirradiation(0、1、26、、4、6、80y),thenweusedthecolonogenicassaytoanalyzetheradiosensitizingeffect,andthentheradiosensitivityparameterswerecalculated;wedividedthegroupsintoblankgroup、groupwitllmedicine、radiationgroup(2Gy)、combinationgroup(trastuzumab+2Gy),cellapoptosiswasanalyzedbythefl7、owcytometry.Results:HER2proteinmainlydistributedincellmembranewas2+,thenumberofHER2/CEPl7>2,SONCI-N87cellwastheHER2overexpressingcell.Theselectedconcentrationoftrastuzumabwas10ug/m1.TheDO、Dq、NandSF2ofthegroupwimmedicinewereallsmallerthanthecontrolgroup.TheSERWaS8、1.2453.Eithertrastuzumaborradiationinducedcellapoptosis,particularlywasthecombinedgroup(P<0.05).Conclusions:TrastuzumabcouldincreasetheradiosensitivityofNCI-N87cellwi
2、、4、6、8Gy),利用克隆形成实验计算胃癌细胞存活率,拟合细胞存活曲线,计算放射的生物学参数;分为空白对照组、药物组、外照射组(2Gy外照射)、联合组(曲妥珠单抗+2Gy外照射),以流式细胞仪检测各组细胞凋亡率。结果:免疫组化法测得在胃癌NCI-N87细胞中HER2蛋白的表达主要分布在细胞膜,为棕褐色颗粒状,NCI-N87为HER2蛋白2+。荧光免疫杂交法检测NCI—N87细胞HER2/CEPl7>2,存在HER2基因扩增。CCK8法筛选的曲妥珠单抗放疗增敏浓度为lOug/ml。加药组D。、Dq、N、SF2均小于对照
3、组,NCI—N87胃癌细胞在曲妥珠单抗lOug/m1剂量下增敏比(SER)为1.2453。曲妥珠单抗或照射组均可增加凋亡率,尤以联合组凋亡率最高(P(O.05)。结论:曲妥珠单抗可提高HER2高表达人胃癌细胞的放疗敏感性,并促进凋亡。曲妥珠单抗有望成为HER2高表达胃癌的放疗增敏剂。硕士研究生韩真真(肿瘤学)指导教师袁胜利副教授关键词:曲妥珠单抗;胃癌;人表皮生长因子受体2;放疗增敏EffectofTrastuzumabonRadiosensitivityofHER2o、。GastricCancerLineAbstra
4、ctObjective:TostudytheradiosensifivityoftrastuzumabonHER2overexpressedgastriccancercellNCI-N87.Methods:ToidentifytheexpressionofHER2ingastriccancercell谢thimmunohistochemical(IHC)methodandthefluorescenceinsituhybridization(FISI-I)method;Theinhibitoryeffectoftrasm
5、zumaboncellproliferationwasmeasuredbyCCK8assay,toselecttheIC20concentrationoftrastuzumabonNCI-N87cell;Acorrdingtoiftrastuzumabwasusedornot,groupsweredividedintothecontrolgroupandthegroupgivenmedicine,tlleywerebothgivenfivedifferentdosesofextemalirradiation(0、1、2
6、、4、6、80y),thenweusedthecolonogenicassaytoanalyzetheradiosensitizingeffect,andthentheradiosensitivityparameterswerecalculated;wedividedthegroupsintoblankgroup、groupwitllmedicine、radiationgroup(2Gy)、combinationgroup(trastuzumab+2Gy),cellapoptosiswasanalyzedbythefl
7、owcytometry.Results:HER2proteinmainlydistributedincellmembranewas2+,thenumberofHER2/CEPl7>2,SONCI-N87cellwastheHER2overexpressingcell.Theselectedconcentrationoftrastuzumabwas10ug/m1.TheDO、Dq、NandSF2ofthegroupwimmedicinewereallsmallerthanthecontrolgroup.TheSERWaS
8、1.2453.Eithertrastuzumaborradiationinducedcellapoptosis,particularlywasthecombinedgroup(P<0.05).Conclusions:TrastuzumabcouldincreasetheradiosensitivityofNCI-N87cellwi
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