RNA binding proteins co-localize with small tau inclusions in tauopathy.

RNA binding proteins co-localize with small tau inclusions in tauopathy.
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RNA结合蛋白与小tau蛋白质的含量共定位。

DOI:
10.1186/s40478-018-0574-5
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发表时间:
2018-08-01
影响因子:
7.1
通讯作者:
Wolozin B
Wolozin B
中科院分区:
医学2区
文献类型:
--
作者:
Maziuk BF;Apicco DJ;Cruz AL;Jiang L;Ash PEA;da Rocha EL;Zhang C;Yu WH;Leszyk J;Abisambra JF;Li H;Wolozin B

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由微管相关蛋白tau组成的不溶性细胞内神经元缠结的发展是包括阿尔茨海默病(AD)在内的tau蛋白病的定义特征。越来越多的证据表明,tau病理与已知的应激颗粒(SG)标志物的RNA结合蛋白(RBP)共定位。在这里,我们使用蛋白质组学来确定tau结合蛋白的网络如何随着rTg 4510小鼠的疾病而变化,然后用免疫组织化学来识别与tau病理学共定位的RNA结合蛋白。tau相互作用组网络揭示了tau和多种RBP之间相互作用的显著疾病相关变化,并且生化分级分离研究表明,随着tau病理学的发展,许多这些蛋白质,包括hnRNPA 0、EWSR 1、PABP和RPL 7形成不溶性聚集体。小鼠和人脑组织的免疫组织化学分析表明,一个不断发展的病理相互作用的模型,其中RBPs与病理磷酸化tau共定位,但发生在较大的病理tau夹杂物附近。我们提出了一种模型,其中tau最初与小复合物中的RBP相互作用,但随着tau病理学的成熟,其演变成孤立的聚集包涵体。本文的在线版本(10.1186/s40478-018-0574-5)包含补充材料,可供授权用户使用。
The development of insoluble, intracellular neurofibrillary tangles composed of the microtubule-associated protein tau is a defining feature of tauopathies, including Alzheimer’s disease (AD). Accumulating evidence suggests that tau pathology co-localizes with RNA binding proteins (RBPs) that are known markers for stress granules (SGs). Here we used proteomics to determine how the network of tau binding proteins changes with disease in the rTg4510 mouse, and then followed up with immunohistochemistry to identify RNA binding proteins that co-localize with tau pathology. The tau interactome networks revealed striking disease-related changes in interactions between tau and a multiple RBPs, and biochemical fractionation studies demonstrated that many of these proteins including hnRNPA0, EWSR1, PABP and RPL7 form insoluble aggregates as tau pathology develops. Immunohistochemical analysis of mouse and human brain tissues suggest a model of evolving pathological interaction, in which RBPs co-localize with pathological phospho-tau but occur adjacent to larger pathological tau inclusions. We suggest a model in which tau initially interacts with RBPs in small complexes, but evolves into isolated aggregated inclusions as tau pathology matures. The online version of this article (10.1186/s40478-018-0574-5) contains supplementary material, which is available to authorized users.
低复杂性蛋白段的原子结构揭示了组装网络的扭结β薄片。
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