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Integrative system biology analyses of CRISPR-edited iPSC-derived neurons and human brains reveal deficiencies of presynaptic signaling in FTLD and PSP

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Jiang, Shan, Wen, Natalie, Li, Zeran, Dube, Umber, Del Aguila, Jorge, Budde, John, Martinez, Rita, Hsu, Simon +7 more·2018·Translational Psychiatry

Abstract

Mutations in the microtubule-associated protein tau (MAPT) gene cause autosomal dominant frontotemporal lobar degeneration with tau inclusions (FTLD-tau).MAPT p.R406W carriers present clinically with progressive memory loss and neuropathologically with neuronal and glial tauopathy. However, the pathogenic events triggered by the expression of the mutant tau protein remain poorly understood. To identify the genes and pathways that are dysregulated in FTLD-tau, we performed transcriptomic analyses in induced pluripotent stem cell (iPSC)–derived neurons carrying MAPT p.R406W and CRISPR/Cas9-corrected isogenic controls. We found that the expression of the MAPT p.R406W mutation was sufficient to create a significantly different transcriptomic profile compared with that of the isogeneic controls and to cause the differential expression of 328 genes. Sixty-one of these genes were also differentially expressed in the same direction between MAPT p.R406W carriers and pathology-free human control brains. We found that genes differentially expressed in the stem cell models and human brains were enriched for pathways involving gamma-aminobutyric acid (GABA) receptors and pre-synaptic function. The expression of GABA receptor genes, including GABRB2 and GABRG2, were consistently reduced in iPSC-derived neurons and brains from MAPT p.R406W carriers. Interestingly, we found that GABA receptor genes, including GABRB2 and GABRG2, are significantly lower in symptomatic mouse models of tauopathy, as well as in brains with progressive supranuclear palsy. Genome wide association analyses reveal that common variants within GABRB2 are associated with increased risk for frontotemporal dementia (P < 1 × 10−3). Thus, our systems biology approach, which leverages molecular data from stem cells, animal models, and human brain tissue can reveal novel disease mechanisms. Here, we demonstrate that MAPT p.R406W is sufficient to induce changes in GABA-mediated signaling and synaptic function, which may contribute to the pathogenesis of FTLD-tau and other primary tauopathies.

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  • iPSC-based models derived from individuals with a MAPT mutation indicate molecular mechanisms underlying tauopathies.

    “Despite this limitation, iPSC-based models derived from individuals with a MAPT mutation indicate molecular mechanisms underlying tauopathies (Gonzalez et al., 2018; lovino et al., 2015; Jiang et al., 2018; Nakamura et al., 2019; Silva et al., 2016, 2020; Wray, 2017).”

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Authors
Jiang, S., Wen, N., Li, Z., Dube, U., Del Aguila, J., Budde, J., Martinez, R., Hsu, S., Fernandez, M. V., Cairns, N. J., Dominantly Inherited Alzheimer Network (DIAN), International FTD-Genomics Consortium (IFGC), Harari, O., Cruchaga, C., & Karch, C. M.
Affiliations
Washington University in St. Louis (US)
Corresponding author
  • Harari, Oscar
  • Cruchaga, Carlos
  • Karch, Celeste M.
Venue
Translational Psychiatry
Published
2018-12-13
Volume
8
Issue
1
Pages
265-265
ISSN
2158-3188 (ISSN-L)
OpenAlex
W2903533912
Cited by
73
References
7
Citations by year
2026: 8 · 2025: 6 · 2024: 8 · 2023: 9 · 2022: 12 · 2021: 13 · 2020: 10 · 2019: 7
FWCI
5.16
Type
journal article
Language
en
Open access
Locations
  • Translational Psychiatry (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, other-oa)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Institutional Research Information System University of Turin (University of Turin) (submittedVersion, other-oa)
  • Digital Commons@Becker (Washington University School of Medicine) (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
  • U.S. Department of Health & Human Services | National Institutes of Health (K01 AG046374, R01 AG056293, R01 AG056923, R01 AG044546, P01 AG003991, RF1 AG053303)
  • Alzheimer's Association (NIRG-11-200110, BAND-14-338165)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Neurology › Amyotrophic Lateral Sclerosis Research
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
progressive supranuclear palsy, tauopathy, iPSC-derived neurons, GABA receptors, GABRB2, GABRG2, presynaptic signaling, synaptic dysfunction, gene expression profiling, frontotemporal dementia
MeSH terms
Aged, Aged, 80 and over, Animals, Brain, Female, Humans, Male, Mice, Inbred C57BL, Neurons, Supranuclear Palsy, Progressive, Signal Transduction, tau Proteins, Receptors, GABA, Induced Pluripotent Stem Cells, Frontotemporal Lobar Degeneration, Transcriptome, CRISPR-Cas Systems

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