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ID:34132297
大小:4.96 MB
页数:57页
时间:2019-03-03
《ephaephrina在癫痫小鼠海马的时空表达对颞叶癫痫形成的影响》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、电子科技大学硕士学位论文EphA/EphrinA在癫痫小鼠海马的时空表达对颞叶癫痫形成的影响姓名:代胜军申请学位级别:硕士专业:生物物理学指导教师:夏阳20090501摘要目的:癫痫是一种常见的神经系统慢性疾病。有研究表明,反复痫性发作或癫痫持续状态可导致脑组织尤其是海马结构等易损区的损伤,而脑损害性病变又可引起痫性发作,两者互为因果,互相转化。致痫成年小鼠与海马损伤的关系已研究的较为广泛和深入,其病理生理特征为轴突出芽、突触重建。而轴突导向因子Eph/Ephrin与慢性癫痫形成之间的关系还不明确。本文旨在探讨它们在颢叶癫痫轴突发芽、轴突重建及突触可塑性的作用,为进一步研究颞叶癫痫的发病机
2、制和临床治疗提供理论依据。方法:本实验通过制备匹罗卡品癫痫持续状态小鼠模型,采用RT-PCR、原位杂交、免疫荧光组织化学方法观察EphA/EphrirtAmRNA及蛋白在慢性癫痫小鼠海马各区中的动态表达,并应用Neo—Timm染色法进行苔藓纤维发芽(mossyfibersprouting,MFS)的观察。结果:1、RT-PCR:与对照组相比,致痫后EphA/EphrinAmRNA各亚型在海马中的表达都发生上调,并在致痫后7天时达到高峰,其中以EphA4(p<0.01),EphA8(p<0.05),EphAl0(p<0.05),EphrinA2(p<0.05),EphrinA3(p3、)和EphrinA4(p<0.05)最为明显。2、原位杂交方法:与对照组相比,致痫后EphrinA4mRNA在海马的CA3,CAl区表达均上调,其中在CA3区的表达,7天时达到高峰(P<0.05);在CAl区的表达14天时达到高峰(P4、在CAl、CA3区14天时达到高峰(P5、A和EphAl0蛋白在致痫后海马各区表达的上调,提示上述轴突导向分子共同参与了癫痫持续状态后脑损伤区的轴突再生活动。3、致痫小鼠海马苔藓纤维出芽主要以CA.3区为主,提示在慢性癫痫形成过程中苔藓纤维出芽模式存在差异,可能暗示了不同癫痫模型在癫痫形成机制上的不同。关键词:颞叶癫痫,EphA/EphrinA,RT-PCR,原位杂交,免疫荧光组化,Neo-Tim染色ABSTRACTPurpose:Epilepsyisac栅omcneurologicaldisease.Smdi鹤haveshownthatrepeatedseizuresorstatusepilepticscallleadtodam6、ageofthebraintissue,especiallyhippocampus,andbraindamagecallbecausedbyseizures.Ithasbeenwidelysmdiedtherelationshipbetweentheepileptogenesisandthehippocampusdamage,butthereisonlyalittleresearchonthecorrelationabouttheaxonguidancefactorsEph7、Ephrinandepileptogenesis.Inthisexperiment,itisobservedthat8、theroleoftheEph9、Ephrinintheaxonreconstructionandsynapticplasticityafterepilepsy.Itwillprovideatheoreticalbasisforthefurtherstudythepathogenesisoftemporallobeepilepsyandclinicaltreatment.Method:Statusepilepticusmo
3、)和EphrinA4(p<0.05)最为明显。2、原位杂交方法:与对照组相比,致痫后EphrinA4mRNA在海马的CA3,CAl区表达均上调,其中在CA3区的表达,7天时达到高峰(P<0.05);在CAl区的表达14天时达到高峰(P4、在CAl、CA3区14天时达到高峰(P5、A和EphAl0蛋白在致痫后海马各区表达的上调,提示上述轴突导向分子共同参与了癫痫持续状态后脑损伤区的轴突再生活动。3、致痫小鼠海马苔藓纤维出芽主要以CA.3区为主,提示在慢性癫痫形成过程中苔藓纤维出芽模式存在差异,可能暗示了不同癫痫模型在癫痫形成机制上的不同。关键词:颞叶癫痫,EphA/EphrinA,RT-PCR,原位杂交,免疫荧光组化,Neo-Tim染色ABSTRACTPurpose:Epilepsyisac栅omcneurologicaldisease.Smdi鹤haveshownthatrepeatedseizuresorstatusepilepticscallleadtodam6、ageofthebraintissue,especiallyhippocampus,andbraindamagecallbecausedbyseizures.Ithasbeenwidelysmdiedtherelationshipbetweentheepileptogenesisandthehippocampusdamage,butthereisonlyalittleresearchonthecorrelationabouttheaxonguidancefactorsEph7、Ephrinandepileptogenesis.Inthisexperiment,itisobservedthat8、theroleoftheEph9、Ephrinintheaxonreconstructionandsynapticplasticityafterepilepsy.Itwillprovideatheoreticalbasisforthefurtherstudythepathogenesisoftemporallobeepilepsyandclinicaltreatment.Method:Statusepilepticusmo
4、在CAl、CA3区14天时达到高峰(P5、A和EphAl0蛋白在致痫后海马各区表达的上调,提示上述轴突导向分子共同参与了癫痫持续状态后脑损伤区的轴突再生活动。3、致痫小鼠海马苔藓纤维出芽主要以CA.3区为主,提示在慢性癫痫形成过程中苔藓纤维出芽模式存在差异,可能暗示了不同癫痫模型在癫痫形成机制上的不同。关键词:颞叶癫痫,EphA/EphrinA,RT-PCR,原位杂交,免疫荧光组化,Neo-Tim染色ABSTRACTPurpose:Epilepsyisac栅omcneurologicaldisease.Smdi鹤haveshownthatrepeatedseizuresorstatusepilepticscallleadtodam6、ageofthebraintissue,especiallyhippocampus,andbraindamagecallbecausedbyseizures.Ithasbeenwidelysmdiedtherelationshipbetweentheepileptogenesisandthehippocampusdamage,butthereisonlyalittleresearchonthecorrelationabouttheaxonguidancefactorsEph7、Ephrinandepileptogenesis.Inthisexperiment,itisobservedthat8、theroleoftheEph9、Ephrinintheaxonreconstructionandsynapticplasticityafterepilepsy.Itwillprovideatheoreticalbasisforthefurtherstudythepathogenesisoftemporallobeepilepsyandclinicaltreatment.Method:Statusepilepticusmo
5、A和EphAl0蛋白在致痫后海马各区表达的上调,提示上述轴突导向分子共同参与了癫痫持续状态后脑损伤区的轴突再生活动。3、致痫小鼠海马苔藓纤维出芽主要以CA.3区为主,提示在慢性癫痫形成过程中苔藓纤维出芽模式存在差异,可能暗示了不同癫痫模型在癫痫形成机制上的不同。关键词:颞叶癫痫,EphA/EphrinA,RT-PCR,原位杂交,免疫荧光组化,Neo-Tim染色ABSTRACTPurpose:Epilepsyisac栅omcneurologicaldisease.Smdi鹤haveshownthatrepeatedseizuresorstatusepilepticscallleadtodam
6、ageofthebraintissue,especiallyhippocampus,andbraindamagecallbecausedbyseizures.Ithasbeenwidelysmdiedtherelationshipbetweentheepileptogenesisandthehippocampusdamage,butthereisonlyalittleresearchonthecorrelationabouttheaxonguidancefactorsEph
7、Ephrinandepileptogenesis.Inthisexperiment,itisobservedthat
8、theroleoftheEph
9、Ephrinintheaxonreconstructionandsynapticplasticityafterepilepsy.Itwillprovideatheoreticalbasisforthefurtherstudythepathogenesisoftemporallobeepilepsyandclinicaltreatment.Method:Statusepilepticusmo
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