预览加载中,请您耐心等待几秒...
1/2
2/2

在线预览结束,喜欢就下载吧,查找使用更方便

如果您无法下载资料,请参考说明:

1、部分资料下载需要金币,请确保您的账户上有足够的金币

2、已购买过的文档,再次下载不重复扣费

3、资料包下载后请先用软件解压,在使用对应软件打开

Cdc25A抑制RIG-I介导的信号通路机制研究 CDC25Aisakeyregulatoryproteinthatcontrolsthecellcycleandpromotescellproliferation.PreviousstudieshaveshownthattheoverexpressionofCDC25Apromotesthedevelopmentofvarioustypesofcancers,includingbreastandlungcancer.RecentresearchhashighlightedtheroleofCDC25AinregulatingtheresponsetoviralinfectionsthroughtheinhibitionofRIG-Imediatedsignalingpathways. RIG-IisacytoplasmicpatternrecognitionreceptorthatrecognizesviralRNAandinitiatestheantiviralimmuneresponse.UponbindingviralRNA,RIG-IundergoesconformationalchangesleadingtotherecruitmentoftheadaptorproteinMAVS,whichactivatesdownstreamsignalingpathways,includingtheactivationofIRF3andNF-κB.TheRIG-Ipathwayplaysacriticalroleintheinnateimmuneresponsetoviralinfections. SeveralstudieshavedemonstratedthatCDC25AinhibitstheRIG-IpathwaybyinteractingwithMAVSandpreventingitsactivation.CDC25AexpressionisupregulatedbycertainvirusessuchastheHepatitisBvirus,andthisupregulationleadstothesuppressionofRIG-Imediatedsignaling.ThissuggeststhatviruseshaveevolvedmechanismstoexploitCDC25Atoevadethehostimmuneresponse. InadditiontoitsinhibitoryeffectonMAVSsignaling,CDC25AhasalsobeenshowntopromotethedegradationofIRF3,acriticaltranscriptionfactorinvolvedintheactivationoftheantiviralresponse.CDC25AbindsdirectlytoIRF3andrecruitstheE3ubiquitinligaseTRIM21,leadingtoitsdegradation.Thisfurtherimpairstheabilityofthehosttomountaneffectiveimmuneresponseagainstviralinfections. Interestingly,CDC25AhasalsobeenshowntointeractwiththeinfluenzavirusproteinNS1,whichisknowntoinhibittheRIG-Ipathway.ThisinteractionmaycontributetothepathogenesisofinfluenzabyenhancingtheabilityofNS1tosuppressthehostimmuneresponse. Inconclusion,CDC25AplaysacriticalroleinregulatingtheantiviralimmuneresponsebyinhibitingtheRIG-ImediatedsignalingpathwayandpromotingthedegradationofkeytranscriptionfactorssuchasIRF3.UnderstandingthemechanismsbywhichvirusesexploitCDC25Atoevadethehostimmunesystemmayleadtothedevelopmentofnoveltherapeuticstrategiesforthetreatmentofviraldiseases.Furt