Abstract
We have previously investigated, discovered, and replicated plasma protein biomarkers for use to triage potential trials participants for PET or cerebrospinal fluid measures of Alzheimer's disease (AD) pathology. This study sought to undertake validation of these candidate plasma biomarkers in a large, multi-center sample collection. Targeted plasma analyses of 34 proteins with prior evidence for prediction of in vivo pathology were conducted in up to 1,000 samples from cognitively healthy elderly individuals, people with mild cognitive impairment, and in patients with AD-type dementia, selected from the EMIF-AD catalogue. Proteins were measured using Luminex xMAP, ELISA, and Meso Scale Discovery assays. Seven proteins replicated in their ability to predict in vivo amyloid pathology. These proteins form a biomarker panel that, along with age, could significantly discriminate between individuals with high and low amyloid pathology with an area under the curve of 0.74. The performance of this biomarker panel remained consistent when tested in apolipoprotein E ϵ4 non-carrier individuals only. This blood-based panel is biologically relevant, measurable using practical immunocapture arrays, and could significantly reduce the cost incurred to clinical trials through screen failure.
| Original language | English |
|---|---|
| Pages (from-to) | 213-225 |
| Number of pages | 13 |
| Journal | Journal of Alzheimer's Disease |
| Volume | 74 |
| Issue number | 1 |
| Early online date | 22 Jan 2020 |
| DOIs | |
| Publication status | Published - 2020 |
Bibliographical note
Funding Information:This research was conducted as part of the EMIF-AD project which has received support from the Innovative Medicines Initiative Joint Undertaking under EMIF grant agreement n\u25E6 115372, resources of which are composed of financial contribution from the European Union\u2019s Seventh Framework Programme (FP7/2007\u20132013) and EFPIA companies\u2019 in-kind contribution. ANH and SL were supported by a MRC Mental Health Data Pathfinder award to the University of Oxford, and by the NIHR Oxford Health Biomedical Research Centre (BRC). FB is supported by the NIHR UCLH biomedical research centre. The Lausanne study was funded by a grant from the Swiss National Research Foundation (SNF 320030141179). Cardiff University acknowledge Wellcome Trust support (grant: 104025/Z/14/Z) as part of the research project entitled \u201CWellcome Trust Consortium for Neuroimmunology of Mood Disorders and Alzheimer\u2019s Disease\u201D. The views expressed are those of the authors and not necessarily those of the MRC, the NHS, the NIHR or the Department of Health.
Publisher Copyright:
© 2020 - IOS Press and the authors. All rights reserved.
Keywords
- Alzheimer’s disease
- amyloid-β
- biomarkers
- plasma
- proteomics
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