Evidence map›Paper›PMID 33742656›Full record

ArticleBrain : a journal of neurology2021

Discriminatory ability of next-generation tau PET tracers for Alzheimer's disease.

Steven Y Yap, Barbara Frias, Melissa C Wren, Michael Schöll, Nick C Fox, Erik Årstad, Tammaryn Lashley, Kerstin Sander

Abstract read
In one paragraph

Article in Brain : a journal of neurology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed, 2 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

29 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Trial
  4. Review
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  6. Review
  7. Article
  8. Article
  9. Improved Tau PET SUVR Quantification in 4-Repeat Tau Phenotypes with [Journal of nuclear medicine : official publication, Society of Nuclear Medicine · 2024
    Article
  10. Article
  11. Review
  12. Test-retest performance of [Imaging neuroscience (Cambridge, Mass.) · 2024
    Article
  13. Article
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  15. Article
  16. Article
  17. Dementia with Lewy bodies: Impact of co-pathologies and implications for clinical trial design.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2023
    Review
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  19. Article
  20. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Steven Y YapDepartment of Imaging, Centre for Radiopharmaceutical Chemistry, University College London, London WC1E 6BS, UK.ORCID 0000-0002-3509-5463
Barbara FriasQueen Square Brain Bank for Neurological Disorders, Department of Clinical and Movement Neurosciences, Queen Square Institute of Neurology, University College London, London WC1N 1PJ, UK.
Melissa C WrenDepartment of Imaging, Centre for Radiopharmaceutical Chemistry, University College London, London WC1E 6BS, UK.
Michael SchöllWallenberg Centre for Molecular and Translational Medicine and the Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, University of Gothenburg, 405 30 Gothenburg, Sweden.ORCID 0000-0001-7800-1781
Nick C FoxDementia Research Centre, Queen Square Institute of Neurology, University College London, London WC1N 3AR, UK.
Erik ÅrstadDepartment of Imaging, Centre for Radiopharmaceutical Chemistry, University College London, London WC1E 6BS, UK.
Tammaryn LashleyQueen Square Brain Bank for Neurological Disorders, Department of Clinical and Movement Neurosciences, Queen Square Institute of Neurology, University College London, London WC1N 1PJ, UK.
Kerstin SanderDepartment of Imaging, Centre for Radiopharmaceutical Chemistry, University College London, London WC1E 6BS, UK.ORCID 0000-0002-6096-7577

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

A next generation of tau PET tracers for the imaging of Alzheimer's disease and other dementias has recently been developed. Whilst the new compounds have now entered clinical studies, there is limited information available to assess their suitability for clinical applications. Head-to-head comparisons are urgently needed to understand differences in the radiotracer binding profiles. We characterized the binding of the tau tracers PI2620, RO948, MK6240 and JNJ067 in human post-mortem brain tissue from a cohort of 25 dementia cases and age-matched controls using quantitative phosphorimaging with tritium-labelled radiotracers in conjunction with phospho-tau specific immunohistochemistry. The four radiotracers depicted tau inclusions composed of paired helical filaments with high specificity, both in cases with Alzheimer's disease and in primary tauopathy cases with concomitant Alzheimer's disease pathology. In contrast, cortical binding to primary tauopathy in cases without paired helical filament tau was found to be within the range of age-matched controls. Off-target binding to monoamine oxidase B has been overcome, as demonstrated by heterologous blocking studies in basal ganglia tissue. The high variability of cortical tracer binding within the Alzheimer's disease group followed the same pattern with each tracer, suggesting that all compounds are suited to differentiate Alzheimer's disease from other dementias.

Indexed as

AgedAged, 80 and overAlzheimer DiseaseBrainFemaleHumansMaleMiddle AgedNeurofibrillary TanglesPositron-Emission TomographyTauopathiestau Proteinstau Proteinshead-to-head comparisonmonoamine oxidase Bneuroimagingpositron emission tomographytauopathies

Identifiers

PMID33742656
PMCPMC8453387

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.