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Genetically engineered MAPT 10+16 mutation causes pathophysiological excitability of human iPSC-derived neurons related to 4R tau-induced dementia
Abstract
Human iPSC lines represent a powerful translational model of tauopathies. We have recently described a pathophysiological phenotype of neuronal excitability of human cells derived from the patients with familial frontotemporal dementia and parkinsonism (FTDP-17) caused by the MAPT 10+16 splice-site mutation. This mutation leads to the increased splicing of 4R tau isoforms. However, the role of different isoforms of tau protein in initiating neuronal dementia-related dysfunction, and the causality between the MAPT 10+16 mutation and altered neuronal activity have remained unclear. Here, we employed genetically engineered cells, in which the IVS10+16 mutation was introduced into healthy donor iPSCs to increase the expression of 4R tau isoform in exon 10, aiming to explore key physiological traits of iPSC-derived MAPT IVS10+16 neurons using patch-clamp electrophysiology and multiphoton fluorescent imaging techniques. We found that during late in vitro neurogenesis (from ~180 to 230 days) iPSC-derived cortical neurons of the control group (parental wild-type tau) exhibited membrane properties compatible with “mature” neurons. In contrast,MAPT IVS10+16 neurons displayed impaired excitability, as reflected by a depolarized resting membrane potential, an increased input resistance, and reduced voltage-gated Na+- and K+-channel-mediated currents. The mutation changed the channel properties of fast-inactivating Na v and decreased the Na v 1.6 protein level.MAPT IVS10+16 neurons exhibited reduced firing accompanied by a changed action potential waveform and severely disturbed intracellular Ca 2+dynamics, both in the soma and dendrites, upon neuronal depolarization. These results unveil a causal link between the MAPT 10+16 mutation, hence overproduction of 4R tau, and a dysfunction of human cells, identifying a biophysical basis of changed neuronal activity in 4R tau-triggered dementia. Our study lends further support to using iPSC lines as a suitable platform for modelling tau-induced human neuropathology in vitro.
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“Mature neurons derived from 10 + 16 hiPSCs with 120-day-long differentiation protocol are obtained to recapitulate several FTD hallmarks: 4R/3R Tau unbalance, neurodegenerative and neurodevelopmental phenotypes [48] and impaired neuronal excitability [49, 50].”
From miR-92a-3p and miR-320a are Upregulated in Plasma Neuron-Derived Extracellular Vesicles of Patients with Frontotemporal Dementia (2025) · cites this paper as [50]
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Tau impairs neural circuits, dominating amyloid-β effects, in Alzheimer models in vivo
Busche, M. A., Wegmann, S., Dujardin, S., Commins, C., Schiantarelli, J., Klickstein, N., Kamath, T. V., Carlson, G. A., Nelken, I., & Hyman, B. T. (2019) · Nature Neuroscience · doi:10.1038/s41593-018-0289-8 · Cited by 413
Meier, S., Bell, M., Lyons, D. N., Rodriguez-Rivera, J., Ingram, A., Fontaine, S. N., Mechas, E., Chen, J., Wolozin, B., LeVine, H., et al. (2016) · The Journal of Neuroscience · doi:10.1523/jneurosci.3029-15.2016 · Cited by 190
Pathological Tau Disrupts Ongoing Network Activity
Menkes-Caspi, N., Yamin, H. G., Kellner, V., Spires-Jones, T. L., Cohen, D., & Stern, E. A. (2015) · Neuron · doi:10.1016/j.neuron.2015.01.025 · Cited by 184
Astroglial Calcium Signaling in Aging and Alzheimer's Disease
Verkhratsky, A. (2019) · Cold Spring Harbor Perspectives in Biology · doi:10.1101/cshperspect.a035188 · Cited by 99
Using Human iPSC-Derived Neurons to Model TAU Aggregation
Verheyen, A., Diels, A., Dijkmans, J., Oyelami, T., Meneghello, G., Mertens, L., Versweyveld, S., Borgers, M., Buist, A., Peeters, P., et al. (2015) · PLOS ONE · doi:10.1371/journal.pone.0146127 · Cited by 86
Esteras, N., Kundel, F., Amodeo, G. F., Pavlov, E. V., Klenerman, D., & Abramov, A. Y. (2021) · The FEBS Journal · doi:10.1111/febs.15340 · Cited by 78
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Manzini, V., Cappelletti, P., Orefice, N. S., Brentari, I., Rigby, M. J., Lo Giudice, M., Feligioni, M., Rivabene, R., Crestini, A., Manfredi, F., et al. (2025) · Molecular Neurobiology · doi:10.1007/s12035-024-04386-z · Cited by 16
Metadata
- Authors
- Kopach, O., Esteras, N., Wray, S., Abramov, A. Y., & Rusakov, D. A.
- Venue
- Cell Death & Disease
- Published
- 2021-07-17
- Volume
- 12
- Issue
- 8
- ISSN
- 2041-4889
- PMC
- PMC8286258
- Cited by
- 26
- References
- 6
- Language
- en
- Funders
- Alzheimer’s Research UK (ARUKSRF2016B-2)
- NIHR UCLH/UCL Biomedical Research Centre
- RCUK | Engineering and Physical Sciences Research Council (EP/R024898/1)
- Wellcome Trust (212251_Z_18_Z)
- European Commission (NEUROTWIN grant 857562)
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