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ID:34636286
大小:13.84 MB
页数:64页
时间:2019-03-08
《补精益视片调控mnu诱导大鼠感光细胞凋亡信号转导通路的研究》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、成都中医药大学硕士学位论文中文摘要目的:本课题以N一甲基一N一亚硝基脲(N-methyl-N—nitrosourea.心U)诱导的大鼠视网膜感光细胞凋亡模型为研究对象,初步探讨补精益视片在感光细胞凋亡过程中信号转导的调控机制及其治疗视网膜退行性病变的作用靶点和分子机理,以具有感光细胞凋亡为共同病理特征的视网膜色素变性为代表性眼病,旨在从不同角度探索补精益视片治疗此类眼病的疗效与机制,为临床用药提供客观依据,同时也为今后研究明目中药防治视网膜变性类疾病提供新的思路和方法。方法:建立MNU诱导的SD大鼠视网膜感光细胞凋亡模型,采用mfERG、组织病理学技术(光、电镜)、原位末端转移酶标记(Tu
2、nel)法观察补精益视片干预后模型大鼠在视网膜功能、组织形态、超微结构及感光细胞凋亡的变化;运用免疫组化和蛋白免疫印迹法(WesternBlot)探索研究补精益视片干预MNU诱导的模型大鼠视网膜感光细胞凋亡前信号转导活性因子P53、Cyt—C、Apaf一1、Caspase-9的蛋白表达变化。结果:①造模后24h,模型组mfERG检测结果显示N。波和P。波振幅降低,峰潜时延长,光镜和电镜观察显示视网膜外核层变薄,结构紊乱,核固缩,光感受器外节盘膜结构异常,Tunel法示感光细胞凋亡率显著增加,提示造模成功,差异有统计学意义(P(O.05);剂量探索研究提示MNU40mg为最佳造模诱导剂量,差
3、异有统计学意义(P4、亡;用药组与阴性对照组比较,各蛋白表达均不同程度下调,差异有统计学意义(Jp5、yl—n—nitrosoureawhichinducedretinaIphotoreceptorapoptosisoftheratretinaphotosensitivitycelImodel,discusstheBuJingYiShitabletontheregulatorymechanismofsignalprocessofphotoreceptorcellapoptosisandactingtargetsandmolecularmechanismofthetreatmentretinaldegenerativediseases,takeretinitispigmentosawhich6、withphotoreceptorcellapoptosisasthecommonpathologicalfeaturesfortherepresentativeeye,aimedfromdifferentanglestoexploretheeffectandmechanismofBuJingYiShitabletinthetreatmentofthesametypeofeyedisease,Provideaguidanceforclinical,alsoprovidenewideasandmethodsofChineseherbsinthefuturepreventionandtreat7、mentofretinaldegenerationdiseases.Methods:EstablishMNUSDinducedratretinalphotosensitivecellsapoptosismodel,usingmfERGhistopathoIogicaltechnology(optical,electronmicroscopy),TUNELmethod,observingBuJingYiShitabletm
4、亡;用药组与阴性对照组比较,各蛋白表达均不同程度下调,差异有统计学意义(Jp5、yl—n—nitrosoureawhichinducedretinaIphotoreceptorapoptosisoftheratretinaphotosensitivitycelImodel,discusstheBuJingYiShitabletontheregulatorymechanismofsignalprocessofphotoreceptorcellapoptosisandactingtargetsandmolecularmechanismofthetreatmentretinaldegenerativediseases,takeretinitispigmentosawhich6、withphotoreceptorcellapoptosisasthecommonpathologicalfeaturesfortherepresentativeeye,aimedfromdifferentanglestoexploretheeffectandmechanismofBuJingYiShitabletinthetreatmentofthesametypeofeyedisease,Provideaguidanceforclinical,alsoprovidenewideasandmethodsofChineseherbsinthefuturepreventionandtreat7、mentofretinaldegenerationdiseases.Methods:EstablishMNUSDinducedratretinalphotosensitivecellsapoptosismodel,usingmfERGhistopathoIogicaltechnology(optical,electronmicroscopy),TUNELmethod,observingBuJingYiShitabletm
5、yl—n—nitrosoureawhichinducedretinaIphotoreceptorapoptosisoftheratretinaphotosensitivitycelImodel,discusstheBuJingYiShitabletontheregulatorymechanismofsignalprocessofphotoreceptorcellapoptosisandactingtargetsandmolecularmechanismofthetreatmentretinaldegenerativediseases,takeretinitispigmentosawhich
6、withphotoreceptorcellapoptosisasthecommonpathologicalfeaturesfortherepresentativeeye,aimedfromdifferentanglestoexploretheeffectandmechanismofBuJingYiShitabletinthetreatmentofthesametypeofeyedisease,Provideaguidanceforclinical,alsoprovidenewideasandmethodsofChineseherbsinthefuturepreventionandtreat
7、mentofretinaldegenerationdiseases.Methods:EstablishMNUSDinducedratretinalphotosensitivecellsapoptosismodel,usingmfERGhistopathoIogicaltechnology(optical,electronmicroscopy),TUNELmethod,observingBuJingYiShitabletm
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