欢迎来到天天文库
浏览记录
ID:32101659
大小:2.05 MB
页数:62页
时间:2019-01-31
《白藜芦醇苷对大鼠急性脑缺血再灌注损伤的保护作用与机制分析》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、硕士学位论文higherinmodelgroup(P<0.01).Piceid—treated,likeorevenbetterthanPTX.treated.soundlymaintainedtheultrastructureoftheinjuredcerebralinarelativelygoodappearance.PiceidsignificantlysuppressedLDproductionandMAOactivity,andatthesametime,Piceidobviouslypreventedreducti
2、onofSODactivity,reducedMDAproductionandinhibitedET-1contentintheinjuredcerebraltissueincomparisonwiththe1/Rmodelatthedoseof7.5,15and30mg/kg,withthemostremarkableeffectsappearingat24hafterI/R.Comparedwithshamgroupand3Piceidgroups,theinfarctsizesofthecerebralweremuchl
3、argerinmodelgroup,expressionofeNOSwasnotobserved,butinanothergroups,eNOSimmumoreactivityinneuronsofischemicterritorywasupregulated.Andalso,Piceidcouldpreventplateletsfrominhibitthereleasingreactions(P4、ralarterywascannulatedforbloodpressuremeasurement.RecordthevaluesofCVR,MBPandCBFforeachlocationbeforeocclusion(baseline),and30minutesafterinductionofischemia(occlusion).OcclusionindogsresultedinsignificantlylessofdecreaseofCVRandMBPinthedogs.Andatthetime,Piceidobvio5、uslypreventedreductionofCBF.Similarly,theexperimentsinvitrodemonstratedthatIL-1B·induced,TheexpressionofICAM·1wasmarkedlyincreased.Theexpressionof1CAM一1wasconfirmedinREMECbyELISA,whichshowedICAM一1expressiontobeincreased.PiceidcoulddirectlyandeffectivelyprotecttheRCM6、ECfromthesedamagesthrou曲inhibitingtheexpressionofICAM一1.CONCLUSIONSPiceideffectivelyrepressedtissueedema,removedoxygenfreeradical;blockedlipidperoxidationandimprovedenergeticmetabolicsystemtoraisetheexpressionofeNOSSOastofurtheramelioratethelightmicroenvironment,whi7、chwereinvolvedintheprotectiveinfluencesofPiceidonthecerebralstructure,cellmorphology,andfunctionalrepairandevenneuronregenerationaftercerebraltrauma-TheeffectsofPiceidwerethesameasorgreaterthanthoseofPTX.AlltheresultsABs’rRACTsuggestedthatPiceidhaspotenttherapeutice8、ffectsinI/Rviaanoxygenfreeradical.Ca2+-NOpathway.KEYWORDSPiceid;lschemia-repeffusioninjury;Secondaryedema;Ultrastructural;Lacticacid;Malon
4、ralarterywascannulatedforbloodpressuremeasurement.RecordthevaluesofCVR,MBPandCBFforeachlocationbeforeocclusion(baseline),and30minutesafterinductionofischemia(occlusion).OcclusionindogsresultedinsignificantlylessofdecreaseofCVRandMBPinthedogs.Andatthetime,Piceidobvio
5、uslypreventedreductionofCBF.Similarly,theexperimentsinvitrodemonstratedthatIL-1B·induced,TheexpressionofICAM·1wasmarkedlyincreased.Theexpressionof1CAM一1wasconfirmedinREMECbyELISA,whichshowedICAM一1expressiontobeincreased.PiceidcoulddirectlyandeffectivelyprotecttheRCM
6、ECfromthesedamagesthrou曲inhibitingtheexpressionofICAM一1.CONCLUSIONSPiceideffectivelyrepressedtissueedema,removedoxygenfreeradical;blockedlipidperoxidationandimprovedenergeticmetabolicsystemtoraisetheexpressionofeNOSSOastofurtheramelioratethelightmicroenvironment,whi
7、chwereinvolvedintheprotectiveinfluencesofPiceidonthecerebralstructure,cellmorphology,andfunctionalrepairandevenneuronregenerationaftercerebraltrauma-TheeffectsofPiceidwerethesameasorgreaterthanthoseofPTX.AlltheresultsABs’rRACTsuggestedthatPiceidhaspotenttherapeutice
8、ffectsinI/Rviaanoxygenfreeradical.Ca2+-NOpathway.KEYWORDSPiceid;lschemia-repeffusioninjury;Secondaryedema;Ultrastructural;Lacticacid;Malon
此文档下载收益归作者所有