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1、TheinfluencesoftheJNKsignalingpathwayonthefunctionofmicrogialandtheexpressionofTNFRMasterdegreecandidate:ZhangWeiSupervisor:ProfessorLiDanqingMajor:InternalMedicineAbstractobjective:Inthepreviousexperiment,wefoundthatBV2cellspresenteddifferentroleswh
2、enculturedinhypoxiastate.Inthisstudy,wewillfurtherexplortheinfluenceoftheJNKsignalingpathwayonthefunctionofmicrogliaandtheexpressionoftumornecrosisfactorreceptor(TNFR).Methods:BV2celllineandPC12celllinewereusedtostandformicrogliaandneuronsrespectivel
3、yinthisstudy.BV2cellsaredividedinto:normalcontrolgroup(normoxiagroup),hypoxialhgroup,hypoxiaIh+SP600125group,hypoxia12hgroupandhypoxia12h+SP600125group.Firstly,westernblotwasusedtodetecttheappropriateSP600125concentrationthatblockedtheJNKsignalingpat
4、hway.Then,BV2cellswereculturedinthesituationofhypoxiawithorwithoutthepresenceofSP600125.PC12cellsurvivalratemeasuredbyCCK一8assayinordertoreflecttheJNKpathwayandBV2cellfunction.AttheSalTletime,analysisBV2cellsTNF—areceptorTNFR1andTNFR2expressionbywest
5、ernblot,anddetectinthedifferentfunctionalstatusBV2cellssecretedexpressionofNGF,TNF-a,andIL-1pbyELISA.Results:1.ThenormalcontrolandtheinjuryofPC12groupsurvivalraterespectivelywas100%and52.37%.TheBV2cellscultureinhypoxiaforlh,thePC12cellsurvivalratewas
6、75.96%;TheSP600125CanenhancePCI2cellsurvivalincreasedto81.88%,significantdifference(P<0.01).WhileBV2cellhypoxia12h,PCI2cellssurvivalrateis36.87%,theSP600125CanincreasePCI2cellssurvivalrateto57.61%,significantdifference(P<0.01).2.Undernormalcircumstan
7、ce,theBV2cellsurfacehasnoTNFRlexpression,onlyasmallamountofTNFR2expression.TheBV2cellscultureinhypoxiafor1h,theexpressionofTNFR2increased,addingSP600125canfurtherincreasetheexpressionofTNFR2(P<0.05);Inhypoxiafor12h,theexpressionofTNFRIincreased,addin
8、g3SP600125canfurtherdecreasetheexpressionofTNFRl(P