简介：AccumulatingevidencehasdemonstratedthatregulatoryT(Treg)cellsplayanimportantroleinthemaintenanceofimmunologicself-toleranceandindown-regulatingvariousimmuneresponses.Thus,therehasrecentlybeenanincreasinginterestinstudyingthebiologyofTregcellsaswellastheirpotentialapplicationintreatingimmunediseases.ManytypesofTregcellsubsetshavebeenreportedinavarietyofdiseasemodels.Amongthesesubsets,αβ-TCR+CD3+CD4-CD8-doublenegative(DN)TregcellsaredefinedbytheircapabilityofinhibitingimmuneresponsesviadirectlykillingeffectorTcellsinanantigenspecificfashion.Furthermore,DNTregcellshavebeenshowntodevelopregulatoryactivityafterencounteringspecificantigens,partiallymediatedbytheacquisitionofMHC-peptidecomplexesfromantigenpresentingcells(APCs).ThepresentationofacquiredalloantigensonDNTcellsallowsforthespecificinteractionbetweenDNTregcellsandalloantigenreactiveeffectorTcells.OncetheDNTregandtargetcellshavecomeintocontact,killingisthenmediatedbyFas/Fas-ligandinteractions,andperhapsthroughotherunidentifiedpathways.Furthercharacterizationofthefunctions,molecularexpressionandmechanismsofactivationofDNTregcellswillhelpinthedevelopmentofnoveltherapiestoinduceantigenspecifictolerancetoselfandforeignantigens.Cellular&MolecularImmunology.2004;1(5):328-335.

简介：在优核质，有DExD/Hhelicase家庭，的至少60个成员许多哪个能察觉到病毒的nucleic酸。由屏蔽所有已知的家庭成员，我们在myeloid作为一个新奇双strandedRNA(dsRNA)传感器识别了helicaseDHX33树枝状的房间(mDCs)。用小heteroduplexRNA(shRNA)的DHX33击倒堵住了mDCs的能力生产类型我干扰素(IFN)响应poly我:C和reovirus。DHX33的HELICc领域被显示poly绑我:C。在DHX33和IPS-1之间的相互作用被DHX33和IPS-1的C终端领域的HELICc区域调停(也指了MAVS和维萨卡)。由RNA干扰的DHX33表示的抑制堵住了poly我:地图kinases的导致C的激活，NF-κ；B和IRF3。在helicaseDHX33和IPS-1之间的相互作用独立于RIG-I/MDA5并且可以是为poly察觉到的一条新奇小径我:在mDCs的C和RNA病毒。