Evidence map›Paper›PMID 37190093›Full record

SynthesisCells2023

Utility of Blood-Based Tau Biomarkers for Mild Cognitive Impairment and Alzheimer's Disease: Systematic Review and Meta-Analysis.

Alex Zabala-Findlay, Lewis K Penny, Richard A Lofthouse, Andrew J Porter, Soumya Palliyil, Charles R Harrington, Claude M Wischik, Mohammad Arastoo

Open access · goldAbstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in Cells, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed, 1 pooled it
5.4field-weighted citation impact, top 3% of its field
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

26 citing papers in PubMed, 1 synthesis or guideline pooled it, 31 citations in OpenAlex.

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  20. Biomarkers Unveiling the Interplay of Mind, Nervous System, and Immunity.Methods in molecular biology (Clifton, N.J.) · 2025
    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 at 1 institution in 1 country.

Alex Zabala-FindlayInstitute of Medical Sciences, University of Aberdeen, Aberdeen AB25 2ZD, UK.
Lewis K PennyInstitute of Medical Sciences, University of Aberdeen, Aberdeen AB25 2ZD, UK.ORCID 0000-0002-3722-4476
Richard A LofthouseInstitute of Medical Sciences, University of Aberdeen, Aberdeen AB25 2ZD, UK.
Andrew J PorterInstitute of Medical Sciences, University of Aberdeen, Aberdeen AB25 2ZD, UK.
Soumya PalliyilInstitute of Medical Sciences, University of Aberdeen, Aberdeen AB25 2ZD, UK.
Charles R HarringtonInstitute of Medical Sciences, University of Aberdeen, Aberdeen AB25 2ZD, UK.ORCID 0000-0003-2250-3920
Claude M WischikInstitute of Medical Sciences, University of Aberdeen, Aberdeen AB25 2ZD, UK.
Mohammad ArastooInstitute of Medical Sciences, University of Aberdeen, Aberdeen AB25 2ZD, UK.
University of Aberdeen · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesWith the development of new technologies capable of detecting low concentrations of Alzheimer's disease (AD) relevant biomarkers, the idea of a blood-based diagnosis of AD is nearing reality. This study aims to consider the evidence of total and phosphorylated tau as blood-based biomarkers for mild cognitive impairment (MCI) and AD when compared to healthy controls.

methodsStudies published between 1 January 2012 and 1 May 2021 (Embase and MEDLINE databases) measuring plasma/serum levels of tau in AD, MCI, and control cohorts were screened for eligibility, including quality and bias assessment via a modified QUADAS. The meta-analyses comprised 48 studies assessing total tau (t-tau), tau phosphorylated at threonine 181 (p-tau181), and tau phosphorylated at threonine 217 (p-tau217), comparing the ratio of biomarker concentrations in MCI, AD, and cognitively unimpaired (CU) controls.

resultsPlasma/serum p-tau181 (mean effect size, 95% CI, 2.02 (1.76-2.27)) and t-tau (mean effect size, 95% CI, 1.77 (1.49-2.04)) were elevated in AD study participants compared to controls. Plasma/serum p-tau181 (mean effect size, 95% CI, 1.34 (1.20-1.49)) and t-tau (mean effect size, 95% CI, 1.47 (1.26-1.67)) were also elevated with moderate effect size in MCI study participants compared to controls. p-tau217 was also assessed, albeit in a small number of eligible studies, for AD vs. CU (mean effect size, 95% CI, 1.89 (1.86-1.92)) and for MCI vs. CU groups (mean effect size, 95% CI, 4.16 (3.61-4.71)).

conclusionsThis paper highlights the growing evidence that blood-based tau biomarkers have early diagnostic utility for Alzheimer's disease. REGISTRATION: PROSPERO No. CRD42020209482.

Indexed as

Alzheimer DiseaseCognitive DysfunctionBiomarkersHumanstau ProteinsBiomarkerstau ProteinsAlzheimer’s diseasebiomarkersblooddiagnosticsmild cognitive impairmenttau

Identifiers

PMID37190093
PMCPMC10136726
OpenAlexW4366393059

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.