HB-EGF在Th17细胞诱导的哮喘气道重塑进程中的作用研究
发布时间:2021-09-08 11:32
一般认为,Th17细胞通过特异性分泌IL-17而参与哮喘气道重塑的发生发展,在该过程中,IL-17作为上游分子而发挥作用,但其下游效应分子至今尚未明确。HB-EGF是EGF家族成员之一,与EGFR结合后能够启动相应的信号通路促进多种气道成分细胞的增生,是哮喘气道重塑过程中最主要的下游分子之一。近来人们发现,HB-EGF/EGFR通路可作为IL-17的下游通路参与骨关节炎、类风湿关节炎、慢性肠炎以及银屑病等自身免疫性疾病的发病。那么,在哮喘气道重塑的进程中,HB-EGF能否作为Th17细胞的下游效应分子呢?我们以急性小鼠哮喘模型和慢性小鼠哮喘气道重塑模型为研究对象,结合体外细胞共培养、Th17细胞过继回输以及单抗剔除等实验技术以期阐述HB-EGF在Th17细胞诱导的哮喘气道重塑过程中的作用。本研究发现:1、致敏小鼠在接受持续的变应原刺激后,其气道组织能够分泌高水平的TGF-p、IL-6以及IL-23,并且高表达转录因子ROR-γt,有利于Th17细胞的定向分化。2、持续的变应原雾化能够诱导致敏小鼠气道黏液分泌细胞增生、ASM细胞肥大和增生以及上皮下胶原纤维沉积等改变,Th17细胞过继回输...
【文章来源】:浙江大学浙江省 211工程院校 985工程院校 教育部直属院校
【文章页数】:91 页
【学位级别】:博士
【部分图文】:
反复持续的OVA雾化攻击营造了一个有利于Thl7细胞分化的微环境Figure3.ProlongedOVAehallengecreatedacytokineenvironmentthatfaeilitated
图4.长期变应原暴露可促进Tkl7型免疫应答的产生Figure4.ProlongedallergenehallengeindueedincreasedThl7resPonseA)IL一17levelsinBALFfromsensit沈edmicechallengedwithOVAorPBSonday24(acutePhase)andondays35and55(ehronicPhase)weremeasuredbyELISA.B)eD4+IL一17+eellnumbersinlungsandparatracheally帅hnodes(pLN)fromaeuteandProlongedOVA一ehallengedmieeandPBSeontrolswereanalyzedbyfloweytometry.ThefrequeneyofCD4+IL一17+eellsinthelymphoeyteregionoftheforwar山sidescatterPlot15shown.ThenumbersindieatedaretheaveragedvaluesofthreeindePendentexPerhaents.26
图6.IL一17单克隆抗体及EGFR抑制剂AG1478能够减轻哮喘气道重塑的严重度Figure6.anti一IL一17mAborAG1478administrationattenuatedProlongedOVA一indueedairwayremodeling.RePeatedOVAsensitizationandehallengeswerePerformedandanti一IL一17mAb,AG1478orisot邓eIgGwereadministeredbeforenebulization.Mieewereeuthanxzedonday55.A)RePresentatlvePhotomierograPhsofPAS一,Massontriehrome一anda一SMA一stainedIungsectionsfromeaehgrouP.B)MueushyPer-secretion,subePithelialcollagendePositionandASMmassthic如esswereresPeetivelyquantifiedby(a)PASseore,theareaof(b)Massontrichlomestaining,(e)a一sMAstainingpermicrometerlengthofthebronehiolarbasementmembrane(林mZ/林m)and(d)levelsoftotalcollagenmeasuredinthelunghomogenate.C)IL一17exPression.TheresultsrePresentthemeans士SDoffourdifferentexPeriments.n=6/grouP.*P<0.05betweengrouPs.29
本文编号:3390713
【文章来源】:浙江大学浙江省 211工程院校 985工程院校 教育部直属院校
【文章页数】:91 页
【学位级别】:博士
【部分图文】:
反复持续的OVA雾化攻击营造了一个有利于Thl7细胞分化的微环境Figure3.ProlongedOVAehallengecreatedacytokineenvironmentthatfaeilitated
图4.长期变应原暴露可促进Tkl7型免疫应答的产生Figure4.ProlongedallergenehallengeindueedincreasedThl7resPonseA)IL一17levelsinBALFfromsensit沈edmicechallengedwithOVAorPBSonday24(acutePhase)andondays35and55(ehronicPhase)weremeasuredbyELISA.B)eD4+IL一17+eellnumbersinlungsandparatracheally帅hnodes(pLN)fromaeuteandProlongedOVA一ehallengedmieeandPBSeontrolswereanalyzedbyfloweytometry.ThefrequeneyofCD4+IL一17+eellsinthelymphoeyteregionoftheforwar山sidescatterPlot15shown.ThenumbersindieatedaretheaveragedvaluesofthreeindePendentexPerhaents.26
图6.IL一17单克隆抗体及EGFR抑制剂AG1478能够减轻哮喘气道重塑的严重度Figure6.anti一IL一17mAborAG1478administrationattenuatedProlongedOVA一indueedairwayremodeling.RePeatedOVAsensitizationandehallengeswerePerformedandanti一IL一17mAb,AG1478orisot邓eIgGwereadministeredbeforenebulization.Mieewereeuthanxzedonday55.A)RePresentatlvePhotomierograPhsofPAS一,Massontriehrome一anda一SMA一stainedIungsectionsfromeaehgrouP.B)MueushyPer-secretion,subePithelialcollagendePositionandASMmassthic如esswereresPeetivelyquantifiedby(a)PASseore,theareaof(b)Massontrichlomestaining,(e)a一sMAstainingpermicrometerlengthofthebronehiolarbasementmembrane(林mZ/林m)and(d)levelsoftotalcollagenmeasuredinthelunghomogenate.C)IL一17exPression.TheresultsrePresentthemeans士SDoffourdifferentexPeriments.n=6/grouP.*P<0.05betweengrouPs.29
本文编号:3390713
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