Cited by 94Alzheimer's disease research and treatmentsPluripotent Stem Cells ResearchAmyotrophic Lateral Sclerosis Research

Distinct Neurodegenerative Changes in an Induced Pluripotent Stem Cell Model of Frontotemporal Dementia Linked to Mutant TAU Protein

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Ehrlich, Marc, Hallmann, Anna-Lena, Reinhardt, Peter, Araúzo-Bravo, Marcos J., Korr, Sabrina, Röpke, Albrecht, Psathaki, Olympia E., Ehling, Petra +9 more·2015·Stem Cell Reports

Abstract

Frontotemporal dementia (FTD) is a frequent form of early-onset dementia and can be caused by mutations in MAPT encoding the microtubule-associated protein TAU. Because of limited availability of neural cells from patients' brains, the underlying mechanisms of neurodegeneration in FTD are poorly understood. Here, we derived induced pluripotent stem cells (iPSCs) from individuals with FTD-associated MAPT mutations and differentiated them into mature neurons. Patient iPSC-derived neurons demonstrated pronounced TAU pathology with increased fragmentation and phospho-TAU immunoreactivity, decreased neurite extension, and increased but reversible oxidative stress response to inhibition of mitochondrial respiration. Furthermore, FTD neurons showed an activation of the unfolded protein response, and a transcriptome analysis demonstrated distinct, disease-associated gene expression profiles. These findings indicate distinct neurodegenerative changes in FTD caused by mutant TAU and highlight the unique opportunity to use neurons differentiated from patient-specific iPSCs to identify potential targets for drug screening purposes and therapeutic intervention.

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Crossref · 10.1016/j.stemcr.2015.06.001

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  • iPSC-derived neurons or NGN2-induced neurons have been unable to produce the 4R Tau isoform found in adult human brains; only the fetal 0N3R splicing isoform is produced, even after one year of differentiation.

    “One of the significant hurdles in modeling AD with iPSC-derived neurons or NGN2-induced neurons for the past decade has been their inability to produce the 4R Tau isoform found in adult human brains [19–22]; only the fetal 0N3R splicing isoform is produced, even after one year of differentiation [19].”

    From Elevated SGK1 increases Tau phosphorylation and microtubule instability in Alzheimer’s patient-derived cortical neurons (2026) · cites this paper as [20]

    In Results (‘Altered Expression of TAU in FTDP-17 iPSC-Derived Neurons’; page unavailable), the paper reports 4R TAU transcripts in iPSC-derived neurons, including controls, and higher levels in neurons carrying the N279K mutation. It reports predominant fetal TAU protein, not exclusive production of the fetal 0N3R isoform. The paper does not establish the claim about one year of differentiation or NGN2-induced neurons. (LLM, conf=0.88)

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  • The increased tau burden with age in tau-V337M organoids mirrors prior observations in 2D iPSC-derived neuronal models and in the human V337M brain.

    “The increased tau burden with age mirrors prior observations in 2D iPSC-derived neuronal models (Ehrlich et al., 2015; Fong et al., 2013; lovino et al., 2015; Silva et al., 2016, 2020; Wren et al., 2015) and in the human V337M brain (Spillantini et al., 1996; Spina et al., 2017).”

    From ELAVL4, splicing, and glutamatergic dysfunction precede neuron loss in MAPT mutation cerebral organoids (2021) · cites this paper as Ehrlich et al., 2015

    The Results section, “Altered Expression of TAU in FTDP-17 iPSC-Derived Neurons” (page unavailable), reports increased tau fragments and increased AT8-positive phosphorylated tau in V337M non-dopaminergic iPSC-derived neurons compared with controls. It does not report that tau burden increased as the neurons aged. Ehrlich et al. is cited for the 2D neuronal-model comparison, not for the separate claim about the human V337M brain. (LLM, conf=0.86)

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  1. Casaccia-Bonnefil P. Gu C. Khursigara G. Chao M.V. p75 neurotrophin receptor as a modulator of survival and death decisions Microsc. Res. Tech. 45 1999 217 224 10383114

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Authors
Ehrlich, M., Hallmann, A.-L., Reinhardt, P., Araúzo-Bravo, M. J., Korr, S., Röpke, A., Psathaki, O. E., Ehling, P., Meuth, S. G., Oblak, A. L., Murrell, J. R., Ghetti, B., Zaehres, H., Schöler, H. R., Sterneckert, J., Kuhlmann, T., & Hargus, G.
Affiliations
  • University Hospital Münster (DE)
  • Max Planck Institute for Molecular Biomedicine (DE)
  • Ikerbasque (ES)
  • University of Münster (DE)
  • Indiana University Indianapolis (US)
Corresponding author
Hargus, Gunnar
Venue
Stem Cell Reports
Publisher
Elsevier BV
Published
2015-07
Volume
5
Issue
1
Pages
83-96
ISSN
2213-6711 (ISSN-L)
OpenAlex
W1795598048
Cited by
94
References
40
Citations by year
2026: 4 · 2025: 3 · 2024: 10 · 2023: 6 · 2022: 9 · 2021: 9 · 2020: 11 · 2019: 8 · 2018: 10 · 2017: 11 · 2016: 11 · 2015: 2
FWCI
8.35
Type
journal article
Language
en
Open access
Locations
  • Stem Cell Reports (publishedVersion, cc-by-nc-nd)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Max Planck Institute for Plasma Physics (submittedVersion)
  • IUScholarWorks (Indiana University) (submittedVersion, cc-by-nc-nd)
  • PMC
Funders
  • Deutsche Forschungsgemeinschaft (FZT 111, GA 402/18-1, SFB-TRR128-B7, STE 1835/1-1)
  • Bundesministerium für Bildung und Forschung (01GN0811, 01GN1008B)
  • U.S. Public Health Service (P30 AG10133)
  • International Myeloma Foundation (AL121108, I-HA-111219)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Pluripotent Stem Cells Research
  • Health Sciences › Medicine › Neurology › Amyotrophic Lateral Sclerosis Research
Keywords
frontotemporal dementia, tau protein, MAPT mutations, induced pluripotent stem cells, iPSC-derived neurons, neurodegeneration, tau phosphorylation, oxidative stress, mitochondrial respiration, unfolded protein response, neurite outgrowth, transcriptome, drug screening
MeSH terms
Cell Differentiation, Gene Expression Regulation, Humans, Mitochondria, Mutation, Neurites, tau Proteins, Oxidative Stress, Gene Expression Profiling, Unfolded Protein Response, Induced Pluripotent Stem Cells, Frontotemporal Dementia

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