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Inhibitory effects of vina-ginsenoside R7 on activation of rat C6 astrocytes induced by LPS and TNF-α combination

越南人参皂苷R7抑制LPS及TNF-α联合诱导大鼠星形胶质细胞C6的激活作用研究



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InhibitoryefectsofvinaginsenosideR7onactivationofratC6astrocytes
inducedbyLPSandTNFαcombination
WANGXiaoshuang,HUANGTao,QINLiyue,LIHongli,LANYunyi,
WUHui,ZHANGBeibei,SHIHailian,WUXiaojun,WANGZhengtao
(ShanghaiKeyLaboratoryofComplexPrescription,InstituteofChineseMateriaMedica,ShanghaiUniversityof
TraditionalChineseMedicine,Shanghai201203,China)
[Abstract] ToinvestigatetheinhibitoryefectandmechanismofvinaginsenosideR7(R7)ontheactivationofratC6astrocytes
celsinducedbyLPS/TNFα,celsinlogarithmicgrowthphasewereculturedinDMEMmediumwithoutFBSfor24hAfterdissocia
tedusing025% EDTAtrypsin,thecelswereseededintorespectiveplatesatthedensityof15×106celspermLandculturedover
nightThecelsweredividedintothefolowinggroups:controlgroup(notreatment),modelgroup(treatedwithLPS1μg·mL-1and
TNFα10μg·L-1treatedfor24h),R7groups(pretreatedwith625,125,25,50,and75μmol·L-1R7,4μmol·L-1L
NMMAfor2handthenstimulatedwithLPS1mg·L-1andTNFα10μg·L-1for24h)CelviabilitywasanalyzedbyCCK8kit
Secretionofnitricoxide(NO)inthemediumwasmeasuredbyGreissmethodConcentrationsofinterleukin6(IL6)andtumornec
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rosisfactor(TNFα)wereassayedbyELISAkitsGeneexpressionsofinflammatoryfactorswereexaminedbyquantitativePCRanaly
sisActivationofNFκBwasdetectedbydualluciferasereportergeneassaykitTheresultsshowedthatR7couldsignificantlyinhibit
thesecretionofNOfromC6celsinadoseefectmanner,withanIC50of34μmol·L
-1Anditcouldreducecelproliferationinduced
byLPS/TNFαstimulationFurthermore,R7at50μmol·L-1significantlydownregulatedgeneexpressionsofiNOS(P<0001),
TNFα(P<0001),IL1β(P<005),andCOX2(P<0001),butcouldnotchangegeneexpressionofIL6However,R7re
ducedthesecretionofTNFα(P<0001)andIL6(P<0001)Furtherstudiesdisclosedthat,diferentconcentrationsofR7(25,
50,100μmol·L-1)couldsignificantlyinhibitthetranscriptionactivityofNFκB(P<005,P<001,andP<0001)Inconclu
sion,R7couldinhibitinflammatoryresponsesinC6celsinducedbyLPS/TNFαprobablybyinhibitingthetranscriptionactivityof
NFκB,whichindicatesitspossibletherapeuticefectinneurologicaldiseasesrelatedtoneuroinflammation
[Keywords] neuroinflammtion;vinaginsenosideR7;LPS;inflammatoryfactor;NFκB;astrocyte
doi:10.4268/cjcmm20160822
  
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