研究揭示孤立淋巴濾泡在開啟區域特異性免疫中的作用
作者:
小柯機器人發布時間:2020/3/12 16:03:06
丹麥技術大學William W. Agace和Thomas M. Fenton小組取得一項新突破。他們通過對人類腸道相關淋巴組織進行免疫分析,揭示了孤立淋巴濾泡在開啟區域特異性免疫中的作用。相關論文於2020年3月10日在線發表在《免疫學》雜誌上。
腸具有一些人體中最多樣化和最複雜的免疫區室。在本研究中,研究人員開發了一種分離人類腸道相關淋巴樣組織(GALT)的方法,該方法允許對黏膜下層、黏膜分離的淋巴濾泡(分別為SM-ILF和M-ILF)以及無GALT的腸固有層(LP)中適應性免疫系統進行前所未有的分析。
SM-ILF和M-ILF在腸徑向上顯示出不同的分布模式,通過MAdCAM-1 +高表達的內皮小靜脈和傳出淋巴管與全身循環系統相連,並具有與免疫誘導部位一致的免疫特性。
IgA測序分析表明,人ILF是以解剖學上受限的方式引發腸道適應性免疫應答的部位。該發現將ILF定位為人類腸道區域免疫的關鍵誘導樞紐,並且該分析方法為將來在健康和疾病狀況下對這些區室的評估提供了渠道。
附:英文原文
Title: Immune Profiling of Human Gut-Associated Lymphoid Tissue Identifies a Role for Isolated Lymphoid Follicles in Priming of Region-Specific Immunity
Author: Thomas M. Fenton, Peter B. Jrgensen, Kristoffer Niss, Samuel J.S. Rubin, Urs M. Mrbe, Lene B. Riis, Clément Da Silva, Adam Plumb, Julien Vandamme, Henrik L. Jakobsen, Sren Brunak, Aida Habtezion, Ole H. Nielsen, Bengt Johansson-Lindbom, William W. Agace
Issue&Volume: 2020-03-10
Abstract: The intestine contains some of the most diverse and complex immune compartments inthe body. Here we describe a method for isolating human gut-associated lymphoid tissues(GALTs) that allows unprecedented profiling of the adaptive immune system in submucosaland mucosal isolated lymphoid follicles (SM-ILFs and M-ILFs, respectively) as wellas in GALT-free intestinal lamina propria (LP). SM-ILF and M-ILF showed distinct patterns of distribution along the lengthof the intestine, were linked to the systemic circulation through MAdCAM-1+ high endothelial venules and efferent lymphatics, and had immune profiles consistentwith immune-inductive sites. IgA sequencing analysis indicated that human ILFs aresites where intestinal adaptive immune responses are initiated in an anatomicallyrestricted manner. Our findings position ILFs as key inductive hubs for regional immunityin the human intestine, and the methods presented will allow future assessment ofthese compartments in health and disease.
DOI: 10.1016/j.immuni.2020.02.001
Source: https://www.cell.com/immunity/fulltext/S1074-7613(20)30072-8