Evidence map›Paper›PMID 34906229›Full record

ArticleAlzheimer's research & therapy2021

Comparison of plasma neurofilament light and total tau as neurodegeneration markers: associations with cognitive and neuroimaging outcomes.

Jordan D Marks, Jeremy A Syrjanen, Jonathan Graff-Radford, Ronald C Petersen, Mary M Machulda, Michelle R Campbell, Alicia Algeciras-Schimnich, Val Lowe, David S Knopman, Clifford R Jack and 3 more

Open access · goldAbstract read
In one paragraph

Article in Alzheimer's research & therapy, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 68 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
68citing papers in PubMed, 3 pooled it
9.2field-weighted citation impact, top 1% 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

68 citing papers in PubMed, 3 syntheses or guidelines pooled it, 80 citations in OpenAlex.

  1. Pooled it
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  19. AβJournal of Alzheimer's disease : JAD · 2025
    Article
  20. Plasma NfL and GFAP for predicting VCI and related brain changes in community and clinical cohorts.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025
    Article

8 more citing papers are in PubMed but not listed here.

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

13 authors at 3 institutions in 1 country.

Jordan D MarksMedical Scientist Training Program, Mayo Clinic Alix School of Medicine, Rochester, MN, USA.
Jeremy A SyrjanenDepartment of Quantitative Health Sciences, Mayo Clinic, Rochester, MN, USA.
Jonathan Graff-RadfordDepartment of Neurology, Mayo Clinic, Rochester, MN, USA.
Ronald C PetersenDepartment of Quantitative Health Sciences, Mayo Clinic, Rochester, MN, USA.
Mary M MachuldaDepartment of Psychiatry and Psychology, Mayo Clinic, Rochester, MN, USA.
Michelle R CampbellDepartment of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA.
Alicia Algeciras-SchimnichDepartment of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA.
Val LoweDepartment of Radiology, Mayo Clinic, Rochester, MN, USA.
David S KnopmanDepartment of Neurology, Mayo Clinic, Rochester, MN, USA.
Clifford R JackDepartment of Radiology, Mayo Clinic, Rochester, MN, USA.
Prashanthi VemuriDepartment of Radiology, Mayo Clinic, Rochester, MN, USA.
Michelle M MielkeDepartment of Quantitative Health Sciences, Mayo Clinic, Rochester, MN, USA. Mielke.Michelle@mayo.edu.ORCID 0000-0001-7177-1185
Alzheimer’s Disease Neuroimaging Initiative
Mayo Clinic in Arizona · USMayo Clinic · USMayo Clinic in Florida · US

Funding

SUPPLEMENT TO ALZHEIMERS DISEASE PATIENT REGISTRYU01AG006786 · NIA · MAYO CLINIC ROCHESTER · PI GRAFF-RADFORD, JONATHAN, JACK, CLIFFORD R. · 1986 to 2023
$49.6M
Research Education ComponentP30AG062677 · NIA · MAYO CLINIC ROCHESTER · PI John Lucas · 2019 to 2026
$33.5M
Disease pathways in the population determined by amyloid, tau, and neurodegeneration imaging biomarkersR37AG011378 · NIA · MAYO CLINIC ROCHESTER · PI CLIFFORD R. JACK · 2018 to 2026
$6.8M
Medical Scientist Traning Program at Mayo ClinicT32GM065841 · NIGMS · MAYO CLINIC ROCHESTER · PI KAUFMANN, SCOTT H, SCHIMMENTI, LISA A · 2003 to 2022
$5.8M
Development, Validation, and Application of an Imaging based CVD ScaleR01NS097495 · NINDS · MAYO CLINIC ROCHESTER · PI VEMURI, PRASHANTHI · 2016 to 2020
$2.9M
"What is N?" Towards operationalizing neurodegeneration in Alzheimer's and related dementiasRF1AG069052 · NIA · MAYO CLINIC ROCHESTER · PI GRAFF-RADFORD, JONATHAN, MIELKE, MICHELLE M · 2021 to 2021
$2.4M
Cerebral Microbleeds in the Aging PopulationK76AG057015 · NIA · MAYO CLINIC ROCHESTER · PI GRAFF-RADFORD, JONATHAN · 2017 to 2021
$1.2M
NIA NIH HHS K76 AG057015NIA NIH HHS P30 AG062677NIA NIH HHS R37 AG011378NIA NIH HHS RF1 AG069052NIA NIH HHS U01 AG006786NIGMS NIH HHS T32 GM065841NINDS NIH HHS R01 NS097495
6 · The paper itself

Abstract

backgroundTotal tau protein (T-Tau) and neurofilament light chain (NfL) have emerged as candidate plasma biomarkers of neurodegeneration, but studies have not compared how these biomarkers cross-sectionally or longitudinally associate with cognitive and neuroimaging measures. We therefore compared plasma T-Tau and NfL as cross-sectional and longitudinal markers of (1) global and domain-specific cognitive decline and (2) neuroimaging markers of cortical thickness, hippocampal volume, white matter integrity, and white matter hyperintensity volume.

methodsWe included 995 participants without dementia who were enrolled in the Mayo Clinic Study of Aging cohort. All had concurrent plasma NfL and T-tau, cognitive status, and neuroimaging data. Follow-up was repeated approximately every 15 months for a median of 6.2 years. Plasma NfL and T-tau were measured on the Simoa-HD1 Platform. Linear mixed effects models adjusted for age, sex, and education examined associations between baseline z-scored plasma NfL or T-tau and cognitive or neuroimaging outcomes. Analyses were replicated in Alzheimer's Disease Neuroimaging Initiative (ADNI) among 387 participants without dementia followed for a median of 3.0 years.

resultsAt baseline, plasma NfL was more strongly associated with all cognitive and neuroimaging outcomes. The combination of having both elevated NfL and T-tau at baseline, compared to elevated levels of either alone, was more strongly associated at cross-section with worse global cognition and memory, and with neuroimaging measures including temporal cortex thickness and increased number of infarcts. In longitudinal analyses, baseline plasma T-tau did not add to the prognostic value of baseline plasma NfL. Results using ADNI data were similar.

conclusionsOur results indicate plasma NfL had better utility as a prognostic marker of cognitive decline and neuroimaging changes. Plasma T-tau added cross-sectional value to NfL in specific contexts.

trial registrationNot applicable.

Indexed as

Alzheimer DiseaseCognitive DysfunctionBiomarkersCognitionCross-Sectional StudiesHumansIntermediate FilamentsNeuroimagingtau ProteinsBiomarkerstau ProteinsBlood-based biomarkerCognitionNeurofilament light chainNeuroimagingTotal tau

Identifiers

PMID34906229
PMCPMC8672619
OpenAlexW4200061343

What OpenQuestion holds

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LicenceCC BY
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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.