Department of Biochemistry and Molecular Pharmacology
Amino Acids, Peptides, and Proteins | Molecular Biology | Nervous System Diseases | Neuroscience and Neurobiology | Nucleic Acids, Nucleotides, and Nucleosides
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.
Alzheimer’s disease, Immunohistochemistry, Mass spectrometry, Neurofibrillary tangle, Protein aggregation, Protein interactome
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© The Author(s). 2018 Open Access: This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
DOI of Published Version
Acta Neuropathol Commun. 2018 Aug 1;6(1):71. doi: 10.1186/s40478-018-0574-5. Link to article on publisher's site
Acta neuropathologica communications
Maziuk BF, Apicco DJ, Cruz AL, Jiang L, Ash PE, da Rocha EL, Zhang C, Yu WH, Leszyk JD, Abisambra JF, Li H, Wolozin B. (2018). RNA binding proteins co-localize with small tau inclusions in tauopathy. Open Access Articles. https://doi.org/10.1186/s40478-018-0574-5. Retrieved from https://escholarship.umassmed.edu/oapubs/3584
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.