Evidence map›Paper›PMID 33304988›Full record

ArticleAlzheimer's & dementia (New York, N. Y.)2020

APOE ε4/ε4 homozygotes with early Alzheimer's disease show accelerated hippocampal atrophy and cortical thinning that correlates with cognitive decline.

Susan Abushakra, Anton P Porsteinsson, Marwan Sabbagh, Luc Bracoud, Joel Schaerer, Aidan Power, John A Hey, David Scott, Joyce Suhy, Martin Tolar and 1 more

Open access · goldAbstract read
In one paragraph

Article in Alzheimer's & dementia (New York, N. Y.), 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed
2.0field-weighted citation impact, top 13% 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

25 citing papers in PubMed, 35 citations in OpenAlex.

  1. Trial
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  4. Lecanemab appropriate use recommendations for clinical practice in the UK.Journal of neurology, neurosurgery, and psychiatry · 2026
    Review
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  10. The role ofFrontiers in neuroscience · 2025
    Review
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  14. Traffic-related air pollution andFrontiers in dementia · 2024
    Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Impact of sex and APOE-Frontiers in neurology · 2023
    Article
  20. Review
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

11 authors at 4 institutions in 1 country.

Susan AbushakraAlzheon Inc. Framingham Massachusetts USA.
Anton P PorsteinssonAlzheimer's Disease Care Research and Education Program University of Rochester Rochester New York USA.
Marwan SabbaghCleveland Clinic Lou Ruvo Center for Brain Health & University of Nevada Las Vegas Nevada USA.
Luc BracoudBioclinica Lyon France.
Joel SchaererBioclinica Lyon France.
Aidan PowerAlzheon Inc. Framingham Massachusetts USA.
John A HeyAlzheon Inc. Framingham Massachusetts USA.
David ScottBioclinica Newark California USA.
Joyce SuhyBioclinica Lyon France.
Martin TolarAlzheon Inc. Framingham Massachusetts USA.
Alzheimer's Disease Neuroimaging Initiative
BioClinica (United States) · USFramingham State University · USCleveland Clinic · USUniversity of Rochester · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionHippocampal volume (HV) and cortical thickness are commonly used imaging biomarkers in Alzheimer's disease (AD) trials, and may have utility as selection criteria for enrichment strategies. Atrophy rates of these measures, in the high-risk apolipoprotein E (APOE) ε4/ε4 homozygous AD subjects are unknown.

methodsData from Alzheimer's Disease Neuroimaging Initiative (ADNI-1) and a tramiprosate trial were analyzed in APOE ε4/ε4 and APOE ε3/ε3 subjects with mild cognitive impairment (MCI) or mild AD. Magnetic resonance imaging (MRI) data were centrally processed using FreeSurfer; total HV and composite average cortical thickness were derived and adjusted for age, head size, and education. Volumetric changes from baseline were assessed using Boundary Shift Integral, and correlated with cognitive changes.

resultsAPOE ε4/ε4 MCI subjects showed significantly higher % HV atrophy and cortical thinning at 12 months (4.4%, 3.1%, n = 29) compared to APOE ε3/ε3 subjects (2.8%, 1.8%, n = 93) and similarly in mild AD (7.4%, 4.7% n = 21 vs 5.4%, 3.3% n = 29). Differences were all significant at 24 months. Over 24 months, HV atrophy and cortical thinning correlated significantly with Alzheimer's Disease Assessment Scale-Cognitive subscale worsening in APOE ε4/ε4 MCI subjects, but not in mild AD. DISCUSSION: Correlation of volumetric measures to cognitive change in APOE ε4/ε4 subjects with early AD supports their role as efficacy biomarkers. If confirmed in a Phase 3 trial with ALZ-801 (pro-drug of tramiprosate) in APOE ε4/ε4 early AD subjects, it may allow their use as surrogate outcomes in future treatment or prevention trials in AD.

Indexed as

ALZ‐801Alzheimer's diseaseamyloid betaamyloid oligomersapolipoprotein E ε4/ε4 homozygotesbiomarkerscortical thicknesshippocampus atrophytramiprosate

Identifiers

PMID33304988
PMCPMC7716452
OpenAlexW3111484274

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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Registered trials

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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.