Cited by 809Dementia and Cognitive Impairment ResearchAlzheimer's disease research and treatmentsCerebrospinal fluid and hydrocephalus

CSF biomarkers of Alzheimer's disease concord with amyloid‐β PET and predict clinical progression: A study of fully automated immunoassays in BioFINDER and ADNI cohorts

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Hansson, Oskar, Seibyl, John, Stomrud, Erik, Zetterberg, Henrik, Trojanowski, John Q., Bittner, Tobias, Lifke, Valeria, Corradini, Veronika +9 more·2018·Alzheimer's & Dementia

Abstract

Introduction: We studied whether fully automated Elecsys cerebrospinal fluid (CSF) immunoassay results were concordant with positron emission tomography (PET) and predicted clinical progression, even with cutoffs established in an independent cohort. Methods: Cutoffs for Elecsys amyloid‐β 1–42 (Aβ), total tau/Aβ(1–42), and phosphorylated tau/Aβ(1–42) were defined against [18 F]flutemetamol PET in Swedish BioFINDER (n = 277) and validated against [18 F]florbetapir PET in Alzheimer's Disease Neuroimaging Initiative (n = 646). Clinical progression in patients with mild cognitive impairment (n = 619) was studied. Results: CSF total tau/Aβ(1–42) and phosphorylated tau/Aβ(1–42) ratios were highly concordant with PET classification in BioFINDER (overall percent agreement: 90%; area under the curve: 94%). The CSF biomarker statuses established by predefined cutoffs were highly concordant with PET classification in Alzheimer's Disease Neuroimaging Initiative (overall percent agreement: 89%–90%; area under the curves: 96%) and predicted greater 2‐year clinical decline in patients with mild cognitive impairment. Strikingly, tau/Aβ ratios were as accurate as semiquantitative PET image assessment in predicting visual read–based outcomes. Discussion: Elecsys CSF biomarker assays may provide reliable alternatives to PET in Alzheimer's disease diagnosis.

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Crossref · 10.1016/j.jalz.2018.01.010

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  • In previous studies, the FDA-approved Elecsys CSF p-tau181/Aβ42 test classified Aβ PET status with overall accuracies of 89-90%.

    “For instance, the FDA-approved Elecsys CSF p-tau181/Aβ42 test has, in previous studies, classified Aβ PET status with overall accuracies of 89–90% (refs. 39–41), which was replicated in the present study.”

    From Highly accurate blood test for Alzheimer's disease is similar or superior to clinical cerebrospinal fluid tests (2024) · cites this paper as [39]

    The Results (§4.1) report 90% overall agreement with amyloid-β PET for the Elecsys CSF pTau/Aβ(1–42) ratio; the Discussion (§5) reports approximately 89–90% agreement across BioFINDER and ADNI. The Methods (§3.6) identify the pTau assay as phosphotau (181P), but our copy does not establish that the test was FDA-approved. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • Extracellular deposition of amyloid-β (Aβ) protein and aggregated hyperphosphorylated tau protein in the brain are two main pathological characteristics of Alzheimer's disease.

    “An extracellular deposition of amyloid-β (Aβ) protein and aggregated form of hyper phosphorylated tau protein in the brain are two main pathological characteristics of AD [41].”
  • For Elecsys immunoassays, CSF cutoffs established in one European cohort could be applied to another independent cohort in the United States to determine amyloid PET status with high accuracy.

    “For example, for the Elecsys immunoassays (Roche Diagnostics), it has been shown that CSF cutoffs established in one European cohort could be applied to another independent cohort in the United States to determine amyloid PET status with high accuracy.24”
  • Fully automated immunoassays have been developed by several different vendors with improved reliability and precision for CSF Aβ and tau species.

    “Recently, fully automated immunoassays have been developed by several different vendors with improved reliability and precision for CSF Aβ and tau species.23,24,25”
  • This robust result is similar to what has been shown when using the Elecsys assays for CSF to establish a cutoff in one cohort and replicating it in a second cohort.

    “This robust result is similar to what has been shown when using the Elecsys assays for CSF to establish a cutoff in one cohort and replicating it in a second cohort.24”

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Authors
Hansson, O., Seibyl, J., Stomrud, E., Zetterberg, H., Trojanowski, J. Q., Bittner, T., Lifke, V., Corradini, V., Eichenlaub, U., Batrla, R., Buck, K., Zink, K., Rabe, C., Blennow, K., Shaw, L. M., for the Swedish BioFINDER study group, & Initiative, A. D. N.
Affiliations
  • Lund University (SE)
  • Institute for Neurodegenerative Disorders (US)
  • Sahlgrenska University Hospital (SE)
  • University of Pennsylvania (US)
  • Former Employee of Roche Diagnostics GmbH Penzberg Germany
  • Roche Diagnostics GmbH Penzberg Germany
  • F. Hoffmann-La Roche AG (CH)
  • Alzheimer’s Disease Neuroimaging Initiative (US)
Corresponding author
  • Hansson, Oskar
  • Blennow, Kaj
  • Shaw, Leslie M.
Venue
Alzheimer's & Dementia
Publisher
Wiley
Published
2018-02-27
Volume
14
Issue
11
Pages
1470-1481
ISSN
  • 1552-5260 (ISSN-L)
  • 1552-5279
OpenAlex
W2789976306
Cited by
808
References
45
Citations by year
2026: 84 · 2025: 117 · 2024: 146 · 2023: 96 · 2022: 98 · 2021: 95 · 2020: 97 · 2019: 56 · 2018: 15 · 2015: 1
FWCI
51.74
Type
journal article
Language
en
Open access
Locations
  • Alzheimer s & Dementia (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion, cc-by-nc-nd)
  • PubMed Central (acceptedVersion, cc-by-nc-nd)
  • UCL Discovery (University College London) (submittedVersion)
  • Lund University Publications (Lund University) (submittedVersion)
Funders
  • Michael J. Fox Foundation for Parkinson's Research
  • Eli Lilly and Company
  • Göteborgs Universitet
  • National Institutes of Health
  • National Institute on Aging (P30AG010124)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Cerebrospinal fluid and hydrocephalus
Keywords
Alzheimer's disease, cerebrospinal fluid biomarkers
MeSH terms
Aged, Alzheimer Disease, Aniline Compounds, Ethylene Glycols, Female, Humans, Immunoassay, Male, Cohort Studies, Biomarkers, Amyloid beta-Peptides, tau Proteins, Disease Progression, Radiopharmaceuticals, Positron-Emission Tomography, Automation, Laboratory, Cognitive Dysfunction

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