Cited by 187Dementia and Cognitive Impairment ResearchAlzheimer's disease research and treatmentsCancer-related cognitive impairment studies

Plasma amyloid β 42/40 ratios as biomarkers for amyloid β cerebral deposition in cognitively normal individuals

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Fandos, Noelia, Pérez‐Grijalba, Virginia, Pesini, Pedro, Olmos, Salvador, Bossa, Matías, Villemagne, Victor L., Doecke, James, Fowler, Christopher +3 more·2017·Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring

Abstract

Introduction: Plasma amyloid β (Aβ) peptides have been previously studied as candidate biomarkers to increase recruitment efficiency in secondary prevention clinical trials for Alzheimer's disease. Methods: Free and total Aβ42/40 plasma ratios (FP42/40 and TP42/40, respectively) were determined using ABtest assays in cognitively normal subjects from the Australian Imaging, Biomarker and Lifestyle Flagship Study. This population was followed‐up for 72 months and their cortical Aβ burden was assessed with positron emission tomography. Results: Cross‐sectional and longitudinal analyses showed an inverse association of Aβ42/40 plasma ratios and cortical Aβ burden. Optimized as a screening tool, TP42/40 reached 81% positive predictive value of high cortical Aβ burden, which represents 110% increase over the population prevalence of cortical Aβ positivity. Discussion: These findings support the use of plasma Aβ42/40 ratios as surrogate biomarkers of cortical Aβ deposition and enrichment tools, reducing the number of subjects submitted to invasive tests and, consequently, recruitment costs in clinical trials targeting cognitively normal individuals.

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Authors
Fandos, N., Pérez‐Grijalba, V., Pesini, P., Olmos, S., Bossa, M., Villemagne, V. L., Doecke, J., Fowler, C., Masters, C. L., Sarasa, M., & AIBL Research Group
Affiliations
  • R&D Department Araclon Biotech Ltd. Zaragoza Spain
  • Universidad de Zaragoza (ES)
  • The University of Melbourne (AU)
  • Commonwealth Scientific and Industrial Research Organisation (AU)
Corresponding author
Pesini, Pedro
Venue
Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
Publisher
Wiley
Published
2017-01
Volume
8
Issue
1
Pages
179-187
ISSN
2352-8729 (ISSN-L)
OpenAlex
W2750795037
Cited by
187
References
52
Citations by year
2026: 9 · 2025: 20 · 2024: 22 · 2023: 27 · 2022: 20 · 2021: 32 · 2020: 23 · 2019: 18 · 2018: 16
FWCI
12.81
Type
journal article
Language
en
Open access
Locations
  • Alzheimer s & Dementia Diagnosis Assessment & Disease Monitoring (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • Minerva Access (University of Melbourne) (submittedVersion, cc-by-nc-nd)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • VUBIR (Vrije Universiteit Brussel) (submittedVersion)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Cancer-related cognitive impairment studies
Keywords
amyloid-beta, Alzheimer's disease biomarkers, cognitively normal individuals, clinical trial recruitment, screening tool, positron emission tomography

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