Cited by 27Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchNeuroinflammation and Neurodegeneration Mechanisms

Transcriptome analyses reveal tau isoform-driven changes in transposable element and gene expression

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Grundman, Jennifer, Spencer, Brian, Sarsoza, Floyd, Rissman, Robert A.·2021·PLOS ONE

Published version of a preprint

Abstract

Alternative splicing of the gene MAPT produces several isoforms of tau protein. Overexpression of these isoforms is characteristic of tauopathies, which are currently untreatable neurodegenerative diseases. Though non-canonical functions of tau have drawn interest, the role of tau isoforms in these diseases has not been fully examined and may reveal new details of tau-driven pathology. In particular, tau has been shown to promote activation of transposable elements—highly regulated nucleotide sequences that replicate throughout the genome and can promote immunologic responses and cellular stress. This study examined tau isoforms’ roles in promoting cell damage and dysregulation of genes and transposable elements at a family-specific and locus-specific level. We performed immunofluorescence, Western blot and cytotoxicity assays, along with paired-end RNA sequencing on differentiated SH-SY5Y cells infected with lentiviral constructs of tau isoforms and treated with amyloid-beta oligomers. Our transcriptomic findings were validated using publicly available RNA-sequencing data from Alzheimer’s disease, progressive supranuclear palsy and control human samples from the Accelerating Medicine’s Partnership for AD (AMP-AD). Significance for biochemical assays was determined using Wilcoxon ranked-sum tests and false discovery rate. Transcriptome analysis was conducted through DESeq2 and the TEToolkit suite available from the Hammell lab at Cold Spring Harbor Laboratory. Our analyses show overexpression of different tau isoforms and their interactions with amyloid-beta in SH-SY5Y cells result in isoform-specific changes in the transcriptome, with locus-specific transposable element dysregulation patterns paralleling those seen in patients with Alzheimer’s disease and progressive supranuclear palsy. Locus-level transposable element expression showed increased dysregulation of L1 and Alu sites, which have been shown to drive pathology in other neurological diseases. We also demonstrated differences in rates of cell death in SH-SY5Y cells depending on tau isoform overexpression. These results demonstrate the importance of examining tau isoforms’ role in neurodegeneration and of further examining transposable element dysregulation in tauopathies and its role in activating the innate immune system.

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  • Subsequent reanalysis of the AMP-AD and ROSMAP data sets by other groups confirmed the initial findings of these studies.

    “Subsequent reanalysis of the AMP-AD and ROSMAP data sets by other groups confirmed the initial findings of these studies (Grundman et al. 2021, Wahl et al. 2023).”

    From The Role of Retrotransposons and Endogenous Retroviruses in Age-Dependent Neurodegenerative Disorders (2024) · cites this paper as Grundman et al. 2021

    The Methods say Grundman et al. reanalyzed RNA-sequencing data from the AMP-AD Knowledge Portal, and the Discussion says their TE-expression analysis largely confirmed earlier findings of ERV activation. The cited paper does not identify a ROSMAP reanalysis, so it supports the AMP-AD portion of the claim but not the claim about both datasets. (LLM, conf=0.85)

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Cited by

Sorted by citations

Authors
Grundman, J., Spencer, B., Sarsoza, F., & Rissman, R. A.
Affiliations
University of California San Diego (US)
Corresponding author
Rissman, Robert A.
Venue
PLOS ONE
Published
2021-09-29
Volume
16
Issue
9
Pages
e0251611
ISSN
1932-6203 (ISSN-L)
OpenAlex
W3203173536
Cited by
27
References
7
Citations by year
2026: 4 · 2025: 6 · 2024: 11 · 2023: 3 · 2022: 2 · 2021: 1
FWCI
2.67
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, public-domain)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, public-domain)
  • Europe PMC (PubMed Central) (publishedVersion, other-oa)
  • PubMed Central (publishedVersion, public-domain)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • National Institute on Aging (RF1 AG072053, RF1 AG065385, R01 AG018440, P30 AG062429)
  • Veterans Affairs San Diego Healthcare System (I01 BX003040, I01 BX004312)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
tau isoforms, MAPT, transposable elements, tauopathy, Alzheimer's disease, progressive supranuclear palsy, amyloid-beta oligomers, Alu elements, gene expression dysregulation, neurodegeneration, cell death, innate immune activation, SH-SY5Y cells
MeSH terms
Alzheimer Disease, Cell Line, DNA Transposable Elements, Gene Expression Regulation, Humans, Supranuclear Palsy, Progressive, Transfection, Case-Control Studies, Lentivirus, Amyloid beta-Peptides, tau Proteins, Alternative Splicing, Sequence Analysis, RNA, Protein Isoforms, Gene Expression Profiling

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