欢迎来到天天文库
浏览记录
ID:31054697
大小:620.50 KB
页数:5页
时间:2019-01-06
《麻黄碱对缺氧缺血新生大鼠海马神经细胞的保护作用》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、文章编号:200909017论著文章编号:200909017麻黄碱对缺氧缺血新生大鼠海马神经细胞的保护作用许蓓1,肖农1,张晓萍2(重庆医科大学:1附属儿童医院康复中心,2儿科研究所,重庆400014)摘要:目的观察麻黄碱(ephedrine,EPH)对大鼠缺氧缺血性脑损伤(Hypoxic-ischemicbraindamage,HIBD)海马神经细胞凋亡及远期学习记忆能力的影响。方法新生SD大鼠(P7)随机分为麻黄碱组(EPH组),对照组(Con组)和假手术组(Sham组)。分别于HIBD后6h,12h,1d,3d,7d采用免疫组织化学检测各组大鼠Bcl-2蛋白和Bax蛋白在海马区的表
2、达,HIBD后4wMorris水迷宫测试其学习记忆能力。结果EPH组Bcl-2表达较Con组显著增高,1d时达到高峰,3d后逐渐下降;Bax蛋白表达较Con组明显降低,1d时最低;各组平均潜伏时间均逐渐缩短,EPH组3~5d时平均潜伏时间较Con组明显缩短。EPH组穿越平台次数及在目标象限游泳距离与总距离百分比均高于Con组。结论麻黄碱可使新生大鼠HIBD后海马Bcl-2蛋白表达增加和Bax蛋白表达减少,并能提高远期学习记忆能力。关键词:缺氧缺血性脑损伤;麻黄碱;Bcl-2;Bax;水迷宫中图法分类号:R364.4R722.1文献标识码:ANeuroprotectiveeffectsof
3、ephedrineafterhypoxic-ischemicbraininjuryinneonatalratsBeiXu1,NongXiao1,XiaoPingZhang2(1.DepartmentofRehabilitationCenter,Children’sHospitalofChongqingMedicalUniversity,Chongqing400014,China;2.PediatricResearchInstitute,Children'sHospitalofChongqingMedicalUniversity,Chongqing400014,China)Abstract
4、ObjectiveToexploretheeffectsofephedrineonhippocampalcellapoptosis andbehavioralperformanceafterhypoxia-ischemiabraininjuryinneonatalrats.MethodsAllratswererandomlydividedinto3groups,i.e.ephedrinetreatedgroup,controlgroup,andshamgroup.Ateachtimeintervalof6h,12h,1d,3d,7dafterhypoxia,expressionofBcl
5、-2andBaxweredetectedinthehippocampalregionbyimmunohistochemistry.At4weeksaftersurgery,behavioralchangesintheremainingratsweretestedbyMorriswatermaze.Results(1)Comparedwithcontrolgroup,theexpressionofBcl-2intheephedrinetreatedgroupwassignificantlyincreasedafterhypoxic-ischemic,peakedat1danddecreas
6、edafter3days .AndtheexpressionofBaxintheephedrinetreatedgroupwasdecreased1dafterhypoxic-ischemic;(2)Theaveragetimeofescapelatencywasgraduallydecreasedineachgroup.However,itismuchshorterinephedrinegroupthancontrolgroup,startedfromthe3rdday.Inaddition,thefrequencyplatformpassingintheephedrinegroupa
7、ndthepercentageofswimmingdistancetraveledintheprevioustargetquadrantwassignificantlygreaterthanthecontrolgroup.ConclusionEphedrinecanregulatetheexpressionofBcl-2andBaxonhippocampusafterhypoxia-ischemia,andimprovetheabi
此文档下载收益归作者所有