Long non-coding RNA SNHG8 drives stress granule formation in tauopathies.
Autor: | Bhagat R; Department of Psychiatry, Washington University in St Louis, St Louis, MO, USA., Minaya MA; Department of Psychiatry, Washington University in St Louis, St Louis, MO, USA., Renganathan A; Department of Psychiatry, Washington University in St Louis, St Louis, MO, USA., Mehra M; Department of Neuroscience, Washington University in St Louis, St Louis, MO, USA., Marsh J; Department of Psychiatry, Washington University in St Louis, St Louis, MO, USA., Martinez R; Department of Psychiatry, Washington University in St Louis, St Louis, MO, USA., Eteleeb AM; Department of Psychiatry, Washington University in St Louis, St Louis, MO, USA., Nana AL; Department of Neurology, UCSF Weill Institute for Neurosciences, University of California, San Francisco, San Francisco, CA, USA., Spina S; Department of Neurology, UCSF Weill Institute for Neurosciences, University of California, San Francisco, San Francisco, CA, USA., Seeley WW; Department of Neurology, UCSF Weill Institute for Neurosciences, University of California, San Francisco, San Francisco, CA, USA.; Department of Pathology, University of California, San Francisco, San Francisco, CA, USA., Grinberg LT; Department of Neurology, UCSF Weill Institute for Neurosciences, University of California, San Francisco, San Francisco, CA, USA.; Department of Pathology, University of California, San Francisco, San Francisco, CA, USA.; Department of Pathology, University of Sao Paulo, São Paulo, Brazil., Karch CM; Department of Psychiatry, Washington University in St Louis, St Louis, MO, USA. karchc@wustl.edu.; Knight Alzheimer Disease Research Center, Washington University in St Louis, St Louis, MO, USA. karchc@wustl.edu. |
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Jazyk: | angličtina |
Zdroj: | Molecular psychiatry [Mol Psychiatry] 2023 Nov; Vol. 28 (11), pp. 4889-4901. Date of Electronic Publication: 2023 Sep 21. |
DOI: | 10.1038/s41380-023-02237-2 |
Abstrakt: | Tauopathies are a heterogenous group of neurodegenerative disorders characterized by tau aggregation in the brain. In a subset of tauopathies, rare mutations in the MAPT gene, which encodes the tau protein, are sufficient to cause disease; however, the events downstream of MAPT mutations are poorly understood. Here, we investigate the role of long non-coding RNAs (lncRNAs), transcripts >200 nucleotides with low/no coding potential that regulate transcription and translation, and their role in tauopathy. Using stem cell derived neurons from patients carrying a MAPT p.P301L, IVS10 + 16, or p.R406W mutation and CRISPR-corrected isogenic controls, we identified transcriptomic changes that occur as a function of the MAPT mutant allele. We identified 15 lncRNAs that were commonly differentially expressed across the three MAPT mutations. The commonly differentially expressed lncRNAs interact with RNA-binding proteins that regulate stress granule formation. Among these lncRNAs, SNHG8 was significantly reduced in a mouse model of tauopathy and in FTLD-tau, progressive supranuclear palsy, and Alzheimer's disease brains. We show that SNHG8 interacts with tau and stress granule-associated RNA-binding protein TIA1. Overexpression of mutant tau in vitro is sufficient to reduce SNHG8 expression and induce stress granule formation. Rescuing SNHG8 expression leads to reduced stress granule formation and reduced TIA1 levels in immortalized cells and in MAPT mutant neurons, suggesting that dysregulation of this non-coding RNA is a causal factor driving stress granule formation via TIA1 in tauopathies. (© 2023. The Author(s).) |
Databáze: | MEDLINE |
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