Cited by 557Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchCerebrospinal fluid and hydrocephalus

Tau biomarkers in Alzheimer's disease: towards implementation in clinical practice and trials

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Ossenkoppele, Rik, van der Kant, Rik, Hansson, Oskar·2022·The Lancet Neurology

Abstract

Background Deposition of tau aggregates is a pathological hallmark of Alzheimer's disease that is closely linked both spatially and temporally to emergence of neurodegeneration and manifestation of clinical symptoms. There is an urgent need for accurate PET, CSF, and plasma biomarkers of tau pathology to improve the diagnostic process in clinical practice and the selection of participants and monitoring of treatment effects in trials.Recent developments Innovative second-generation tau-PET tracers with high affinity and selectivity to tau pathology in Alzheimer's disease have enabled detection of tau pathology in medial temporal lobe subregions that are affected in the earliest disease stages. Furthermore, novel but common tau spreading subtypes have been discovered using tau-PET, suggesting much greater interindividual differences in the distribution of tau pathology across the brain than previously assumed. In the CSF biomarker field, novel phosphorylated tau (p-tau) assays have been introduced that better reflect tau tangle load than established CSF biomarkers of tau pathology. The advent of cost-effective and accessible blood-based biomarkers for tau pathophysiology (ie, p-tau181, p-tau217, and p-tau231) might transform the Alzheimer's disease field, as these biomarkers correlate with post-mortem Alzheimer's disease pathology, differentiate Alzheimer's disease from other types of dementia, and predict future progression from normal cognition and mild cognitive impairment to Alzheimer's disease. In controlled investigational settings, improvements in tau-PET and biofluid p-tau markers have led to earlier disease detection, more accurate diagnostic methods, and refinement of prognosis. The anti-tau therapy landscape is rapidly evolving, with multiple ongoing phase 1 and 2 trials of post-translational modification of tau, tau immunotherapy, tau aggregation inhibitors, and targeting production of tau and reduction of intracellular tau levels. Neuroimaging and biofluid tau markers hold potential for optimising such clinical trials by augmenting participant selection, providing evidence of target engagement, and monitoring treatment efficacy. WHERE NEXT?: Major challenges to overcome are the high cost of tau-PET, partial sensitivity to detect early-stage Alzheimer's disease pathology, and off-target tracer binding. Prospective validation studies of biofluid p-tau markers are needed, and assay-related preanalytical and analytical factors need further refinement. Future studies should focus on demonstrating the diagnostic and prognostic accuracy of tau biomarkers-blood-based markers in particular-in non-tertiary settings, such as primary care, which is characterised by a diverse population with medical comorbidities. Large-scale head-to-head studies are needed across different stages of Alzheimer's disease to determine which tau biomarker is optimal in various clinical scenarios, such as early diagnosis, differential diagnosis, and prognosis, and for aspects of clinical trial design, such as proving target engagement, optimising participant selection, and refining monitoring of treatment effects.

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  • It is crucial to reduce the need for PET scans due to their inaccessibility and costliness while preserving the ability to estimate AD pathology load and distribution.

    “it is crucial to find ways to reduce the need for PET scans due to their relative inaccessibility and costliness, while still preserving the ability to estimate the load and distribution of AD pathology as accurately and comprehensively. 12 , 13”

    From Machine learning prediction of tau‐PET in Alzheimer's disease using plasma, MRI, and clinical data (2025) · cites this paper as [12]

    The 'Tau biomarkers in clinical practice' section identifies cost and limited accessibility as practical drawbacks of tau-PET, and 'Tau biomarkers to improve clinical trials' describes cost-effective blood-based screening. But the paper emphasizes that PET provides regional information about tau pathology; it does not establish that reducing PET use would preserve equally accurate and comprehensive estimates of pathology load and distribution. Page numbers were not available in our copy. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Tau-PET is frequently used in clinical trials for AD during screening and to monitor treatment effects.

    “Tau‐PET is often considered a state‐of‐the‐art outcome in AD research studies, a very accurate prognostic tool in patients with AD, and frequently used in clinical trials for AD during screening and to monitor treatment effects. 12 , 14 , 15 , 16”

    From Machine learning prediction of tau‐PET in Alzheimer's disease using plasma, MRI, and clinical data (2025) · cites this paper as [12]

    The section “Tau biomarkers to improve clinical trials” (page unavailable) describes tau-PET-based participant selection and gives an example of its use in a phase 2 trial. The Rapid Review section (page unavailable) says tau-PET has an advantage for monitoring treatment effects. These passages support the proposed roles, but do not establish that tau-PET is frequently used for both purposes in AD trials. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Tau protein distribution strongly correlates with clinical symptoms, making it a highly specific pathological biomarker in AD patients.

    “As a major component of NFTs, tau protein exhibits a spatial and temporal distribution that strongly correlates with clinical symptoms, making it a highly specific pathological biomarker in AD patients.152”
  • Tau-PET is often considered a state-of-the-art outcome in AD research studies.

    “Tau‐PET is often considered a state‐of‐the‐art outcome in AD research studies, a very accurate prognostic tool in patients with AD, and frequently used in clinical trials for AD during screening and to monitor treatment effects. 12 , 14 , 15 , 16”
  • Tau-PET is a very accurate prognostic tool in patients with AD.

    “Tau‐PET is often considered a state‐of‐the‐art outcome in AD research studies, a very accurate prognostic tool in patients with AD, and frequently used in clinical trials for AD during screening and to monitor treatment effects. 12 , 14 , 15 , 16”

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2 of the 79 references couldn’t be matched to a known paper.

Research works printed but not linked: 14

  1. Gibbons GS, Lee VMY, Trojanowski JQ. Mechanisms of celltocell transmission of pathological tau: a review. JAMA Neurol 2019; 76: 101-08.
  2. Brickman AM, Manly JJ, Honig LS, et al. Plasma ptau181, ptau217, and other bloodbased Alzheimer's disease biomarkers in a multiethnic, community study. Alzheimers Dement 2021; 17: 1353-64.
  3. Leuzy A, Janelidze S, MattssonCarlgren N, et al. Comparing the clinical utility and diagnostic performance of cerebrospinal fluid ptau181, ptau217 and ptau231 assays. Neurology 2021; 97: 1681-94.
  4. Meyer PF, Ashton NJ, Karikari TK, et al. Plasma ptau231, ptau181, PET biomarkers, and cognitive change in older adults. Ann Neurol 2022; 91: 548-60.
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  10. Lu M, Liu T, Jiao Q, et al. Discovery of a Keap1dependent peptide PROTAC to knockdown tau by ubiquitinationproteasome degradation pathway. Eur J Med Chem 2018; 146: 251-9.
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  12. Myeku N, Clelland CL, Emrani S, et al. Taudriven 26S proteasome impairment and cognitive dysfunction can be prevented early in disease by activating cAMPPKA signaling. Nat Med 2016; 22: 46-53.
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Authors
Ossenkoppele, R., van der Kant, R., & Hansson, O.
Affiliations
Lund University (SE)
Corresponding author
Ossenkoppele, Rik
Venue
The Lancet Neurology
Publisher
Elsevier BV
Published
2022-08
Volume
21
Issue
8
Pages
726-734
ISSN
1474-4422 (ISSN-L)
OpenAlex
W4281564421
Cited by
557
References
79
Citations by year
2026: 127 · 2025: 174 · 2024: 142 · 2023: 98 · 2022: 15
FWCI
14.76
Type
journal article
Language
en
Open access
Locations
  • The Lancet Neurology (publishedVersion)
  • PubMed (publishedVersion)
  • Amsterdam UMC (VU Amsterdam) - Institutional Repository (publishedVersion)
  • VU Research Portal (publishedVersion, other-oa)
  • Pure Amsterdam UMC (acceptedVersion, other-oa)
  • Lund University Publications (Lund University) (submittedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion, other-oa)
  • Data Archiving and Networked Services (DANS) (submittedVersion)
Funders
Deutsches Zentrum für Neurodegenerative Erkrankungen
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 › Cellular and Molecular Neuroscience › Cerebrospinal fluid and hydrocephalus
Keywords
Alzheimer's disease, tau pathology, tau biomarkers, tau PET tracers, phosphorylated tau, cerebrospinal fluid biomarkers, blood-based biomarkers, anti-tau therapy, clinical trial participant selection, early disease detection, tau immunotherapy, tau aggregation inhibitors, dementia diagnosis, mild cognitive impairment, primary care
MeSH terms
Alzheimer Disease, Brain, Humans, Biomarkers, Amyloid beta-Peptides, tau Proteins, Neuroimaging, Cognitive Dysfunction

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