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时间:2020-05-23
《槲皮素诱导大鼠肝细胞I型血红素氧化酶表达的分子机制.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、中华肝脏病杂志2013年l1月第2l卷第l1期ChinJHepatol,November2013,Vo1.21,No.11·865·槲皮素诱导大鼠肝细胞I型血红素氧化酶表达的分子机制侯伟刘爽姚平刘烈刚覃华【摘要l目的研究槲皮素对大鼠原代肝细胞中I型血红素氧化酶(HO一1)诱导的分子机制。方法二步胶原酶技术分离培养大鼠原代肝细胞。不同剂量槲皮素作用大鼠原代肝细胞不同时间后,用RT-PCR方法检测HO-1的mRNA表达;50mol/L槲皮素分别与10“mol/LPD98059、10mol/LSB203580、10
2、mol/LSP600125、1“mol/LWortmannin共孵育原代大鼠肝细胞12h后,用RT-PCR、Westernblot法检测H()_1mRNA和核因子E2相关因子2(Nf2)蛋白表达水平的变化。对数据进行单因素方差分析、Bonferroni检验。结果大鼠原代肝细胞经25~200mol/L槲皮素处理12h,或用50mol/L槲皮素处理4~12h后,HO一1的mRNA表达水平较对照组明显升高(尸值均3、2,t=19.520,P<0.01),胞核内Nf2蛋白的表达也被PD98059明显抑制(0.14士0.04与0.04±0.01,f=4.114,尸<0.05)。结论槲皮素可能通过细胞外信号调节激酶/Nrf2信号转导通路诱导大鼠原代肝细胞H0—1的表达。【关键词】肝细胞;有丝分裂素激活蛋白激酶类;血红素氧化酶(脱环);槲皮素l核因子E2相关因子2Potentialmolecularmechanismsofquercefin-inducedhemeoxygenase-1inratprimaryhepatocyte4、sHOUWei*LIUShuang,YAOPing,LIULie-gang,QINHua.*DepartmentofGastroenterology,TonalHospitalofTongjiMedicalCollege,HuazhongUniversityofScienceandTechnology,Wuhan430034ChinaCorrespondingauthor."QINHua,Emaihdrqinhua@163.cornIAbstractlObjectiveToinvestigatetheposs5、iblemolecularmechanismsofhemeoxygenase-1(rio一1)inductionbyquercetinusingmtprimaryhepatocytes.MethodsSpmgue-Dawleyratprimaryhepatocyteswereisolatedusingatwo-stepcollagenaseperfusiontechniqueandtreatedwithquercetinatvariousdosesr25—200rtmol/L)andtimes(2—12h).6、Toinvestigatetherolesofvarioussignalingpathways,thehepatocyteswerepre—treatedwith50tunol/Lquercetinplusanextmcellularsignal-regulatedkinase(ERK)inhibitor(PD98059at10~nol/L),ap38inhibitor(SB203580at100tool/L),ac-JunN-terminalkinaseinhibitor(SP600125at100tool7、/L)oraphosphatidylinositol3-kinaseinhibitor(Wortmanninat1rtmol/L)for12h.ChangesinthemRNAandproteinlevelsofHO-1andnuclearfactor,ethryroid-2relatedfactor2(Nr£Z)weredetectedbyRT-PCRandwesternblotting.ResultsAfter4-12hoftreatmentwithquercetinatallconcentrations8、,theHO-1mRNAlevelinhepatoeyteshadincreasedsignificantly(vs.untreatedcontrolcells;allP<0.01).Thequercetin-inducedHO-1expressionandNrt2translocationintothenucleoluswasinhibitedbyPD98059.ConclusionQuercet
3、2,t=19.520,P<0.01),胞核内Nf2蛋白的表达也被PD98059明显抑制(0.14士0.04与0.04±0.01,f=4.114,尸<0.05)。结论槲皮素可能通过细胞外信号调节激酶/Nrf2信号转导通路诱导大鼠原代肝细胞H0—1的表达。【关键词】肝细胞;有丝分裂素激活蛋白激酶类;血红素氧化酶(脱环);槲皮素l核因子E2相关因子2Potentialmolecularmechanismsofquercefin-inducedhemeoxygenase-1inratprimaryhepatocyte
4、sHOUWei*LIUShuang,YAOPing,LIULie-gang,QINHua.*DepartmentofGastroenterology,TonalHospitalofTongjiMedicalCollege,HuazhongUniversityofScienceandTechnology,Wuhan430034ChinaCorrespondingauthor."QINHua,Emaihdrqinhua@163.cornIAbstractlObjectiveToinvestigatetheposs
5、iblemolecularmechanismsofhemeoxygenase-1(rio一1)inductionbyquercetinusingmtprimaryhepatocytes.MethodsSpmgue-Dawleyratprimaryhepatocyteswereisolatedusingatwo-stepcollagenaseperfusiontechniqueandtreatedwithquercetinatvariousdosesr25—200rtmol/L)andtimes(2—12h).
6、Toinvestigatetherolesofvarioussignalingpathways,thehepatocyteswerepre—treatedwith50tunol/Lquercetinplusanextmcellularsignal-regulatedkinase(ERK)inhibitor(PD98059at10~nol/L),ap38inhibitor(SB203580at100tool/L),ac-JunN-terminalkinaseinhibitor(SP600125at100tool
7、/L)oraphosphatidylinositol3-kinaseinhibitor(Wortmanninat1rtmol/L)for12h.ChangesinthemRNAandproteinlevelsofHO-1andnuclearfactor,ethryroid-2relatedfactor2(Nr£Z)weredetectedbyRT-PCRandwesternblotting.ResultsAfter4-12hoftreatmentwithquercetinatallconcentrations
8、,theHO-1mRNAlevelinhepatoeyteshadincreasedsignificantly(vs.untreatedcontrolcells;allP<0.01).Thequercetin-inducedHO-1expressionandNrt2translocationintothenucleoluswasinhibitedbyPD98059.ConclusionQuercet
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