轉錄因子T-bet區分具有明顯組織分布和抗體特異性的記憶B細胞亞群
作者:
小柯機器人發布時間:2020/5/6 14:08:53
美國賓夕法尼亞大學Michael P. Cancro小組在研究中取得進展。他們發現轉錄因子T-bet區分具有明顯組織分布和抗體特異性的記憶B細胞亞群。相關論文於2020年4月29日在線發表在《免疫》雜誌上。
研究人員在流感特異性免疫反應的背景下檢查了T-bet+和T-bet-記憶B細胞(MBC)的解剖分布、克隆關係和功能特性。在小鼠中,T-bet-和T-bet+血凝素(HA)特異性B細胞均在生發中心出現,從而獲得記憶B細胞標記,並無限期持續。譜系追蹤和IgH譜表分析顯示,T-bet-和T-bet+MBC之間的相互轉化最小,分析顯示出不同的組織駐留和再循環特性。T-bet+MBC可以細分為循環T-betloMBC和脾臟T-bethiMBC。人類的MBC具有類似的功能。條件性基因刪除研究表明,幾乎所有HA特異性IgG2c抗體和持久的流感中和滴度都需要B細胞中的T-bet表達。因此,T-bet表達可區分具有明顯不同的歸巢、駐留和功能特性的MBC亞群,並介導體液免疫記憶的不同方面。
據了解,表達轉錄因子T-bet的B細胞亞群與體液免疫反應和自身免疫相關。
附:英文原文
Title: The Transcription Factor T-bet Resolves Memory B Cell Subsets with Distinct Tissue Distributions and Antibody Specificities in Mice and Humans
Author: John L. Johnson, Rebecca L. Rosenthal, James J. Knox, Arpita Myles, Martin S. Naradikian, Joanna Madej, Mariya Kostiv, Aaron M. Rosenfeld, Wenzhao Meng, Shannon R. Christensen, Scott E. Hensley, Jonathan Yewdell, David H. Canaday, Jinfang Zhu, Adrian B. McDermott, Yoav Dori, Max Itkin, E. John Wherry, Norbert Pardi, Drew Weissman, Ali Naji, Eline T. Luning Prak, Michael R. Betts, Michael P. Cancro
Issue&Volume: 2020-04-29
Abstract: B cell subsets expressing the transcription factor T-bet are associated with humoralimmune responses and autoimmunity. Here, we examined the anatomic distribution, clonalrelationships, and functional properties of T-bet+ and T-bet memory B cells (MBCs) in the context of the influenza-specific immune response. Inmice, both T-bet and T-bet+ hemagglutinin (HA)-specific B cells arose in germinal centers, acquired memory Bcell markers, and persisted indefinitely. Lineage tracing and IgH repertoire analysesrevealed minimal interconversion between T-bet and T-bet+ MBCs, and parabionts showed differential tissue residency and recirculation properties.T-bet+ MBCs could be subdivided into recirculating T-betlo MBCs and spleen-resident T-bethi MBCs. Human MBCs displayed similar features. Conditional gene deletion studies revealedthat T-bet expression in B cells was required for nearly all HA stalk-specific IgG2cantibodies and for durable neutralizing titers to influenza. Thus, T-bet expressiondistinguishes MBC subsets that have profoundly different homing, residency, and functionalproperties, and mediate distinct aspects of humoral immune memory.
DOI: 10.1016/j.immuni.2020.03.020
Source: https://www.cell.com/immunity/fulltext/S1074-7613(20)30133-3