Tau翻譯後修飾圖譜可確定患者的異質性和阿爾茨海默氏病的階段
作者:
小柯機器人發布時間:2020/11/17 15:45:49
美國波士頓兒童醫院Judith A. Steen研究團隊發現,Tau翻譯後修飾圖譜可確定患者的異質性和阿爾茨海默氏病的階段。這一研究成果於2020年11月13日在線發表在國際學術期刊《細胞》上。
為了闡明Tau亞型和翻譯後修飾(PTM)化學計量在阿爾茨海默氏病(AD)中的作用,研究人員生成了Tau多種同工型的95個PTM高解析度定量蛋白質組學圖譜,這些蛋白從49個AD和42個對照受試者的死後人體組織中分離而來。儘管Tau PTM圖顯示了受試者之間的異質性,但PTM的一個子集顯示出較高的AD陽性率和頻率,從而表明在疾病中的重要性。無監督分析表明PTM有序地發生,導致Tau聚集。
總之,這項研究鑑定出在疾病不同階段對疾病幹預至關重要的Tau蛋白特徵,包括0N和4R亞型的富集、C末端的代表性不足、脯氨酸豐富區(PRR)中負電荷的增加,以及微管結合域(MBD)中正電荷的減少。
附:英文原文
Title: Tau PTM Profiles Identify Patient Heterogeneity and Stages of Alzheimer’s Disease
Author: Hendrik Wesseling, Waltraud Mair, Mukesh Kumar, Christoph N. Schlaffner, Shaojun Tang, Pieter Beerepoot, Benoit Fatou, Amanda J. Guise, Long Cheng, Shuko Takeda, Jan Muntel, Melissa S. Rotunno, Simon Dujardin, Peter Davies, Kenneth S. Kosik, Bruce L. Miller, Sabina Berretta, John C. Hedreen, Lea T. Grinberg, William W. Seeley, Bradley T. Hyman, Hanno Steen, Judith A. Steen
Issue&Volume: 2020-11-13
Abstract: To elucidate the role of Tau isoforms and post-translational modification (PTM) stoichiometryin Alzheimer’s disease (AD), we generated a high-resolution quantitative proteomicsmap of 95 PTMs on multiple isoforms of Tau isolated from postmortem human tissue from49 AD and 42 control subjects. Although Tau PTM maps reveal heterogeneity across subjects,a subset of PTMs display high occupancy and frequency for AD, suggesting importancein disease. Unsupervised analyses indicate that PTMs occur in an ordered manner, leadingto Tau aggregation. The processive addition and minimal set of PTMs associated withseeding activity was further defined by analysis of size-fractionated Tau. To summarize,features in the Tau protein critical for disease intervention at different stagesof disease are identified, including enrichment of 0N and 4R isoforms, underrepresentationof the C terminus, an increase in negative charge in the proline-rich region (PRR),and a decrease in positive charge in the microtubule binding domain (MBD).
DOI: 10.1016/j.cell.2020.10.029
Source: https://www.cell.com/cell/fulltext/S0092-8674(20)31393-3
Cell:《細胞》,創刊於1974年。隸屬於細胞出版社,最新IF:36.216