白藜蘆醇苷對大鼠急性腦缺血再灌注損傷的保護(hù)作用與機(jī)制分析

白藜蘆醇苷對大鼠急性腦缺血再灌注損傷的保護(hù)作用與機(jī)制分析

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頁數(shù):62頁

時(shí)間:2019-01-31

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1、碩士學(xué)位論文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(P

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

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