PIR介導先天髓樣細胞對非自身MHC分子的記憶
作者:
小柯機器人發布時間:2020/5/10 12:46:17
美國匹茲堡大學Fadi G. Lakkis、Martin H. Oberbarnscheidt、康奈爾大學Xian C. Li等研究人員合作發現,PIR介導先天髓樣細胞對非自身MHC分子的記憶。該研究於2020年5月7日在線發表於《科學》。
研究人員表明,鼠單核細胞和巨噬細胞獲得MHC-I抗原特有的記憶,並識別成對的免疫球蛋白樣受體-A(PIR-A)作為記憶應答所必需的MHC-I受體。
研究人員證明敲除受體中的PIR-A或阻止PIR-A與供體MHC-1分子的結合會阻止記憶並減弱腎臟和心臟同種異體移植的排斥反應。因此,先天髓樣細胞獲得了同種異體抗原特異性記憶,這可用於改善移植效果。
據了解,免疫記憶是適應性淋巴樣細胞的主要特徵,這種記憶特定於先前遇到的抗原。然而,尚不清楚先天髓樣細胞是否保留先前抗原刺激的記憶,並在隨後的相遇中對其產生更強烈的反應。
附:英文原文
Title: PIRs mediate innate myeloid cell memory to nonself MHC molecules
Author: Hehua Dai, Peixiang Lan, Daqiang Zhao, Khodor Abou-Daya, Wentao Liu, Wenhao Chen, Andrew J. Friday, Amanda L. Williams, Tao Sun, Jianjiao Chen, Wei Chen, Steven Mortin-Toth, Jayne S. Danska, Chris Wiebe, Peter Nickerson, Tengfang Li, Lisa R. Mathews, Hêth R. Turnquist, Matthew L. Nicotra, Sebastien Gingras, Eiji Takayama, Hiromi Kubagawa, Mark J. Shlomchik, Martin H. Oberbarnscheidt, Xian C. Li, Fadi G. Lakkis
Issue&Volume: 2020/05/07
Abstract: Abstract Immunological memory specific to previously encountered antigens is a cardinal feature of adaptive lymphoid cells. It is unknown however whether innate myeloid cells retain memory of prior antigenic stimulation and respond to it more vigorously upon subsequent encounters. Here, we show that murine monocytes and macrophages acquire memory specific to MHC-I antigens and identify paired immunoglobulin-like receptors-A (PIR-A) as the MHC-I receptors necessary for the memory response. We demonstrate that deleting PIR-A in the recipient or blocking PIR-A binding to donor MHC-I molecules blocks memory and attenuates kidney and heart allograft rejection. Thus, innate myeloid cells acquire alloantigen-specific memory that can be targeted to improve transplant outcomes.
DOI: 10.1126/science.aax4040
Source: https://science.sciencemag.org/content/early/2020/05/06/science.aax4040
Science:《科學》,創刊於1880年。隸屬於美國科學促進會,最新IF:41.037