FPR1是宿主免疫細胞上的鼠疫受體
作者:
小柯機器人發布時間:2019/9/19 14:50:54
美國阿貢國家實驗室Dominique Missiakas研究組發現N-甲醯基肽受體(FPR1)是宿主免疫細胞上的鼠疫受體。 2019年9月18日在線出版的《自然》發表了這項成果。
研究者發現在人體免疫細胞中鼠疫桿菌III型分泌系統的針帽狀蛋白LcrV與N-甲醯基肽受體(FPR1)結合促進細菌效應物的轉運。小鼠的瘟疫感染是特點是死亡率高,然而,Fpr1缺失小鼠的存活率升高並且增強了對抗鼠疫病毒的抗體反應。研究者鑑定了FPR1R190W是人體中保護中性粒細胞免受鼠疫桿菌III型分泌系統破壞的候選等位基因。因此,FPR1是人和小鼠體內保守的鼠疫受體,它的缺失或突變提高宿主對鼠疫桿菌的抵禦。此外,鼠疫選擇的FPR1等位基因似乎已形成對其他傳染病和惡性腫瘤的免疫反應。
據介紹,鼠疫耶爾森氏菌利用III型分泌系統分泌的的致病因子選擇性地破壞宿主免疫細胞,並且鼠疫耶爾森氏菌在血液中繁殖並通過跳蚤傳播給新宿主。不過,導致鼠疫細菌選擇性破壞免疫細胞的主要因子尚不清楚。
附:英文原文
Title: FPR1 is the plague receptor on host immune cells
Author: Patrick Osei-Owusu, Thomas M. Charlton, Hwan Keun Kim, Dominique Missiakas, Olaf Schneewind
Issue&Volume: 2019-09-18
Abstract:
The causative agent of plague, Yersinia pestis, uses a type III secretion system to selectively destroy immune cells in humans, thus enabling Y. pestis to reproduce in the bloodstream and be transmitted to new hosts through fleabites. The host factors that are responsible for the selective destruction of immune cells by plague bacteria are unknown. Here we show that LcrV, the needle cap protein of the Y. pestis type III secretion system, binds to the N-formylpeptide receptor (FPR1) on human immune cells to promote the translocation of bacterial effectors. Plague infection in mice is characterized by high mortality; however, Fpr1-deficient mice have increased survival and antibody responses that are protective against plague. We identified FPR1R190W as a candidate resistance allele in humans that protects neutrophils from destruction by the Y. pestis type III secretion system. Thus, FPR1 is a plague receptor on immune cells in both humans and mice, and its absence or mutation provides protection against Y. pestis. Furthermore, plague selection of FPR1 alleles appears to have shaped human immune responses towards other infectious diseases and malignant neoplasms.
DOI: 10.1038/s41586-019-1570-z
Source:https://www.nature.com/articles/s41586-019-1570-z