研究揭示組織巨噬細胞激活對全身免疫的影響
作者:
小柯機器人發布時間:2019/11/13 16:29:27
美國麻省總醫院和哈佛醫學院Matthias Nahrendorf研究組近日發現,組織特異性巨噬細胞對遠端損傷的響應能夠影響隨後局部免疫應答的結果。這一研究成果於2019年11月12日在線發表在國際學術期刊《免疫》上。
研究人員檢測了重要器官中巨噬細胞在這些損傷後對全身反應的貢獻。研究人員針對患有心肌梗塞、中風或膿毒症的小鼠的心臟、腦、肝、腎和肺中巨噬細胞數量、來源和基因表達的變化進行了完整統計。主要由局部增殖的加劇推動,組織巨噬細胞數量得以全身性增加。相同器官中的巨噬細胞通過改變組織特異性基因組的表達,對不同的損傷有相似的反應。先出現的心肌梗死由於增強了細菌清除作用從而而提高了隨後的肺炎存活率,這是由IFN?活化肺泡巨噬細胞引起的。相反,巨噬細胞中的EGF受體信號轉導加劇了炎症性肺損傷。這些數據表明局部損傷可激活遠端器官中的巨噬細胞,而靶向巨噬細胞可提高對心肌梗塞、中風和膿毒症後系統併發症的抵抗力。
據悉,心肌梗塞、中風和膿毒症引起全身性炎症和難以處理的機體併發症。
Title: Tissue-Specific Macrophage Responses to Remote Injury Impact the Outcome of Subsequent Local Immune Challenge
Author: Friedrich Felix Hoyer, Kamila Naxerova, Maximilian J. Schloss, Maarten Hulsmans, Anil V. Nair, Partha Dutta, David M. Calcagno, Fanny Herisson, Atsushi Anzai, Yuan Sun, Gregory Wojtkiewicz, David Rohde, Vanessa Frodermann, Katrien Vandoorne, Gabriel Courties, Yoshiko Iwamoto, Christopher S. Garris, David L. Williams, Sylvie Breton, Dennis Brown, Michael Whalen, Peter Libby, Mikael J. Pittet, Kevin R. King, Ralph Weissleder, Filip K. Swirski, Matthias Nahrendorf
Issue&Volume: November 12, 2019
Abstract: Myocardial infarction, stroke, and sepsis trigger systemic inflammation and organism-widecomplications that are difficult to manage. Here, we examined the contribution ofmacrophages residing in vital organs to the systemic response after these injuries.We generated a comprehensive catalog of changes in macrophage number, origin, andgene expression in the heart, brain, liver, kidney, and lung of mice with myocardialinfarction, stroke, or sepsis. Predominantly fueled by heightened local proliferation,tissue macrophage numbers increased systemically. Macrophages in the same organ respondedsimilarly to different injuries by altering expression of tissue-specific gene sets.Preceding myocardial infarction improved survival of subsequent pneumonia due to enhancedbacterial clearance, which was caused by IFN priming of alveolar macrophages. Conversely,EGF receptor signaling in macrophages exacerbated inflammatory lung injury. Our datasuggest that local injury activates macrophages in remote organs and that targetingmacrophages could improve resilience against systemic complications following myocardialinfarction, stroke, and sepsis.
DOI: 10.1016/j.immuni.2019.10.010
Source: https://www.cell.com/immunity/fulltext/S1074-7613(19)30454-6