Cited by 71Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchNeuroinflammation and Neurodegeneration Mechanisms

Ultrasensitive tau biosensor cells detect no seeding in Alzheimer’s disease CSF

Open access
Hitt, Brian D., Vaquer-Alicea, Jaime, Manon, Victor A., Beaver, Joshua D., Kashmer, Omar M., Garcia, Jan N., Diamond, Marc I.·2021·Acta Neuropathologica Communications

Abstract

Tau protein forms self-replicating assemblies (seeds) that may underlie progression of pathology in Alzheimer’s disease (AD) and related tauopathies. Seeding in recombinant protein preparations and brain homogenates has been quantified with “biosensor” cell lines that express tau with a disease-associated mutation (P301S) fused to complementary fluorescent proteins. Quantification of induced aggregation in cells that score positive by fluorescence resonance energy transfer (FRET) is accomplished by cell imaging or flow cytometry. Several groups have reported seeding activity in antemortem cerebrospinal fluid (CSF) using various methods, but these findings are not yet widely replicated. To address this question, we created two improved FRET-based biosensor cell lines based on tau expression, termed version 2 low (v2L) and version 2 high (v2H). We determined that v2H cells are ~ 100-fold more sensitive to AD-derived tau seeds than our original lines, and coupled with immunoprecipitation reliably detect seeding from samples containing as little as 100 attomoles of recombinant tau fibrils or ~ 32 pg of total protein from AD brain homogenate. We tested antemortem CSF from 11 subjects with a clinical diagnosis of AD, 9 confirmed by validated CSF biomarkers. We used immunoprecipitation coupled with seed detection in v2H cells and detected no tau seeding in any sample. Thus we cannot confirm prior reports of tau seeding activity in the CSF of AD patients. This next generation of ultra-sensitive tau biosensors may nonetheless be useful to the research community to quantify tau pathology as sensitively and specifically as possible.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1186/s40478-021-01185-8

Cites

45 of 45 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Tau FRET sensors composed of tau P301S-Ruby2 and -Clover reporters aggregate and transmit FRET signals in the presence of seed-competent tau species.

    “These reporter proteins aggregate and transmit FRET signals in the presence of seed-competent tau species (44, 45).”

    From Modeling late-onset Alzheimer’s disease neuropathology via direct neuronal reprogramming (2024) · cites this paper as [44]

    The Results section (‘Construction of tau RD(P301S) v2H biosensor cells’; page not available) reports that the biosensors aggregate and produce FRET upon exposure to tau seeds. But the Methods section (‘Generation of biosensor cell lines’; page not available) identifies the reporters as tau RD(P301S) fused to mClover3 and mCerulean3, not Ruby2 and Clover. (LLM, conf=0.90)

    Experimental — accuracy not yet measured

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Hitt, B. D., Vaquer-Alicea, J., Manon, V. A., Beaver, J. D., Kashmer, O. M., Garcia, J. N., & Diamond, M. I.
Affiliations
The University of Texas Southwestern Medical Center (US)
Corresponding author
Diamond, Marc I.
Venue
Acta Neuropathologica Communications
Published
2021-05-26
Volume
9
Issue
1
Pages
99-99
ISSN
2051-5960 (ISSN-L)
OpenAlex
W3165482231
Cited by
71
References
45
Citations by year
2026: 11 · 2025: 14 · 2024: 12 · 2023: 18 · 2022: 10 · 2021: 6
FWCI
7.23
Type
journal article
Language
en
Open access
Locations
  • Acta Neuropathologica Communications (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • National Institute of Neurological Disorders and Stroke (5R25NS098987)
  • Alzheimer's Association (2018-AACSF-591977)
  • Broughton Foundation
  • National Institute on Aging (R01AG059689-01A1)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
tau seeding, Alzheimer's disease, cerebrospinal fluid, P301S tau, FRET biosensor, tau aggregation, tauopathy, cerebrospinal fluid biomarkers, immunoprecipitation, antemortem diagnosis
MeSH terms
Aged, Aged, 80 and over, Alzheimer Disease, Animals, Brain, Cells, Cultured, Female, Humans, Male, Mice, Inbred C57BL, Mice, Transgenic, Middle Aged, Biosensing Techniques, tau Proteins, Mice, HEK293 Cells

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review