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Exposure to fibrillar proteins leads to widespread infiltration but only mild tau pathology in cortical organoids.

Overview

Authors: Abdulkhalek Dakhel1, Tobias Mothes1, Khalid Eltom1, Wojciech P Michno1,2, Anna Erlandsson1
  1. Department of Public Health and Caring Sciences, Molecular Geriatrics, Uppsala University, 75185 Uppsala, Sweden
  2. Science for Life Laboratory, Uppsala University, Uppsala, Sweden
Institutions: Uppsala University (Sweden); Science for Life Laboratory (Sweden)
Journal: iScience, volume 29, issue 5, article 115819
Dates: received 14 November 2025; accepted 16 April 2026; published online 20 April 2026
Type: Research article · Language: English
License: CC BY
Identifiers: DOI 10.1016/j.isci.2026.115819 · PMID 42111182 · PMCID PMC13157081 · OpenAlex W7155014570
Open access: gold, a free copy (OpenAlex)
Status: code on request
Categories: Alzheimer's / dementia (population), cellular / molecular (subfield)
Methods: Statistics, Connectivity, fMRI & imaging
Keywords: Biological sciences, Neuroscience, Stem cells research, Techniques in neuroscience
Topic: Neurogenesis and neuroplasticity mechanisms (Developmental Neuroscience, Neuroscience), according to OpenAlex
Funding: The Dementia Foundation (2024); Olle Engkvist Foundation (215-0399); Parkinson's Foundation (1476/23); Swedish Research Council (2021-02563); Maja & JP Åhlén Foundation (233044); OE and Edla Johanssons Scientific Foundation; Alzheimer Fund (AF-980656); Gun and Bertil Stohnes Foundation (2023); Swedish Fund for Research Without Animal Experiments (F2022-0004); King Gustaf V and Queen Victoria's Foundation; Brain Foundation (FO2022-0083)
Citations: not cited yet (Europe PMC); 43 references in the paper
Research resources: Mouse monoclonal Anti-Tau (TAU-5) RRID:AB_10980631, Chicken polyclonal Anti-Vimentin RRID:AB_11212377, Mouse monoclonal Anti-MAP2 (Clone 198A5) RRID:AB_2147096, Mouse monoclonal Anti-Tau (PHF-1) RRID:AB_2315150, Rabbit polyclonal Anti-Tau (T22) RRID:AB_2888681, RRID:AB_2893278, Chicken polyclonal Anti-GFAP RRID:AB_304558, RRID:AB_310013, RRID:AB_310014, Human: Cntrl-9-II iPSC RRID:CVCL_JL74

Abstract

Alzheimer’s disease (AD) and Parkinson’s disease (PD) are the most common neurodegenerative disorders, both characterized by accumulation of aggregated proteins. In AD, the pathological deposits consist predominantly of amyloid-beta (Aβ) and tau, while alpha-synuclein (αSYN) forms inclusions in PD. However, cross-seeding often generates mixed pathologies. Emerging evidence suggests a role of astrocytes in disease spreading, but the underlying mechanisms remain unclear, partly due to limitations of mouse models in replicating early human disease. To address this, we developed a human cerebral organoid platform to study early sporadic AD/PD events. We introduced fibrillar aggregates of αSYN, Aβ, and tau directly into organoids or via astrocytes pre-exposed to the aggregates. All proteins successfully penetrated the organoids with distinct morphology and distribution patterns. Twelve weeks post-exposure, organoids exposed to Aβ or αSYN-containing astrocytes showed the highest insoluble tau levels, but none developed robust tau pathology, highlighting limitations in organoid modeling of tau pathology.

Reproduced under the paper's license (CC BY), from the paper cited above.

Code

The paper says that its authors' code is available on request: it was not published with the paper, so there is nothing to verify.

The paper's code and data availability statement is in the Data section.

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Data

No dataset and no data link were found in the paper.

Data and code availability

Western blot images generated are included in the article and supplementary figures. Additional microscopy data reported here will be shared by the lead contact upon request.

This study does not report original code.

Any additional information required to reanalyze the data reported in this study is available from the lead contact upon request.

Reproduced under the paper's license (CC BY), from the paper cited above.

Versions

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Version 1, 29 September 2026: the first record

Recorded: type, language, journal, volume, issue, pages, dates, 5 authors, 4 keywords, 11 funders, 43 references, 10 RRIDs.

Cite

This paper

Dakhel, A., Mothes, T., Eltom, K., Michno, W. P., & Erlandsson, A. (2026). Exposure to fibrillar proteins leads to widespread infiltration but only mild tau pathology in cortical organoids. iScience, 29(5), 115819. https://doi.org/10.1016/j.isci.2026.115819

BibTeX

@article{dakhel2026exposure,
author = {Dakhel, Abdulkhalek and Mothes, Tobias and Eltom, Khalid and Michno, Wojciech P and Erlandsson, Anna},
title = {{Exposure to fibrillar proteins leads to widespread infiltration but only mild tau pathology in cortical organoids}},
journal = {iScience},
year = {2026},
month = apr,
volume = {29},
number = {5},
pages = {115819},
publisher = {Elsevier},
issn = {2589-0042},
doi = {10.1016/j.isci.2026.115819},
url = {https://doi.org/10.1016/j.isci.2026.115819},
pmid = {42111182},
pmcid = {PMC13157081}
}

RIS

TY - JOUR
AU - Dakhel, Abdulkhalek
AU - Mothes, Tobias
AU - Eltom, Khalid
AU - Michno, Wojciech P
AU - Erlandsson, Anna
TI - Exposure to fibrillar proteins leads to widespread infiltration but only mild tau pathology in cortical organoids
T2 - iScience
J2 - iScience
PY - 2026
DA - 2026/04/20
VL - 29
IS - 5
SP - 115819
SN - 2589-0042
PB - Elsevier
DO - 10.1016/j.isci.2026.115819
UR - https://doi.org/10.1016/j.isci.2026.115819
LA - en
ER -

CSL-JSON

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