QRICH1通過蛋白質穩態的轉錄調控來決定內質網應激的結果
作者:
小柯機器人發布時間:2021/1/3 16:01:59
近日,美國哈佛大學Ramnik J. Xavier等研究人員合作發現,QRICH1通過蛋白質穩態的轉錄調控來決定內質網應激的結果。2021年1月1日出版的《科學》雜誌發表了這項成果。
據研究人員介紹,組織穩態在多種炎性病理中均受到幹擾。這些變化會引起內質網(ER)壓力、蛋白質錯誤摺疊和細胞死亡。內質網應激會觸發未摺疊蛋白反應(UPR),從而促進內質網蛋白穩態和細胞存活或觸發程序性細胞死亡。
研究人員利用單細胞RNA測序來定義了與小鼠腸上皮中的適應性UPR與最終UPR相關的動態轉錄狀態。研究人員將這些轉錄程序與基因組規模的CRISPR篩選相結合,從而在功能上剖析了UPR途徑。研究人員發現,QRICH1是UPR中PERK-eIF2α信號軸的關鍵效應因子。QRICH1控制與轉錄和分泌網絡相關的轉錄程序,這些轉錄和分泌網絡在炎症性病理中被上調。因此,QRICH1決定了細胞對病理性ER應激的反應。
附:英文原文
Title: QRICH1 dictates the outcome of ER stress through transcriptional control of proteostasis
Author: Kwontae You, Lingfei Wang, Chih-Hung Chou, Kai Liu, Toru Nakata, Alok Jaiswal, Junmei Yao, Ariel Lefkovith, Abdifatah Omar, Jacqueline G. Perrigoue, Jennifer E. Towne, Aviv Regev, Daniel B. Graham, Ramnik J. Xavier
Issue&Volume: 2021/01/01
Abstract: Tissue homeostasis is perturbed in a diversity of inflammatory pathologies. These changes can elicit endoplasmic reticulum (ER) stress, protein misfolding, and cell death. ER stress triggers the unfolded protein response (UPR), which can promote recovery of ER proteostasis and cell survival or trigger programmed cell death. Here, we leveraged single-cell RNA sequencing to define dynamic transcriptional states associated with the adaptive versus terminal UPR in the mouse intestinal epithelium. We integrated these transcriptional programs with genome-scale CRISPR screening to dissect the UPR pathway functionally. We identified QRICH1 as a key effector of the PERK-eIF2α axis of the UPR. QRICH1 controlled a transcriptional program associated with translation and secretory networks that were specifically up-regulated in inflammatory pathologies. Thus, QRICH1 dictates cell fate in response to pathological ER stress.
DOI: 10.1126/science.abb6896
Source: https://science.sciencemag.org/content/371/6524/eabb6896
Science:《科學》,創刊於1880年。隸屬於美國科學促進會,最新IF:41.037