Evidence map›Paper›PMID 22821396›Full record

ArticleHuman molecular genetics2012

Cerebrospinal fluid APOE levels: an endophenotype for genetic studies for Alzheimer's disease.

Carlos Cruchaga, John S K Kauwe, Petra Nowotny, Kelly Bales, Eve H Pickering, Kevin Mayo, Sarah Bertelsen, Anthony Hinrichs, Alzheimer's Disease Neuroimaging Initiative, Anne M Fagan and 3 more

Open access · bronzeAbstract read
In one paragraph

Article in Human molecular genetics, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 138 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
138citing papers in PubMed, 4 pooled it
8.8field-weighted citation impact, top 2% 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

138 citing papers in PubMed, 4 syntheses or guidelines pooled it, 209 citations in OpenAlex.

  1. Pooled it
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  13. ApoE3 Christchurch and tau interaction as a protective mechanism against Alzheimer's disease.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025
    Article
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78 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 4 institutions in 1 country.

Carlos CruchagaDepartment of Psychiatry, Washington University School of Medicine, St Louis, MO 63110, USA.
John S K Kauwe
Petra Nowotny
Kelly Bales
Eve H Pickering
Kevin Mayo
Sarah Bertelsen
Anthony Hinrichs
Alzheimer's Disease Neuroimaging Initiative
Anne M Fagan
David M Holtzman
John C Morris
Alison M Goate
Hope Center for Neurological Disorders · USPfizer (United States) · USBrigham Young University · USWashington University in St. Louis · US

Funding

Alzheimer's Disease Neuroimaging Initiative - SupplementU01AG024904 · NIA · NORTHERN CALIFORNIA INSTITUTE RES &EDUC · PI WEINER, MICHAEL W · 2004 to 2015
$121.0M
Alzheimer's Disease Genetics ConsortiumU01AG032984 · NIA · UNIVERSITY OF PENNSYLVANIA · PI SCHELLENBERG, GERARD DAVID · 2009 to 2024
$60.4M
WASHINGTON UNIVERSITY ALZHEIMERS DISEASE RESEARCH CENTERP50AG005681 · NIA · WASHINGTON UNIVERSITY · PI MORRIS, JOHN · 1985 to 2019
$52.1M
UC Davis Alzheimer's Disease Core CenterP30AG010129 · NIA · UNIVERSITY OF CALIFORNIA DAVIS · PI DECARLI, CHARLES · 1991 to 2020
$28.3M
Use of Endophenotypes in the Search for Alzheimer's Disease Risk GenesR01AG035083 · NIA · WASHINGTON UNIVERSITY · PI GOATE, ALISON M · 2010 to 2014
$2.3M
Translational Neuroscientist and the Hope CenterP30NS069329 · NINDS · WASHINGTON UNIVERSITY · PI GOATE, ALISON M · 2009 to 2010
$1.4M
"MR Morphometrics and Cognitive Decline Rate in Large-Scale Aging Studies"K01AG030514 · NIA · UNIVERSITY OF CALIFORNIA AT DAVIS · PI CARMICHAEL, OWEN T. · 2008 to 2012
$495k
CIHRMedical Research Council G0300429Medical Research Council G0902227NIA NIH HHS K01 AG030514NIA NIH HHS P30 AG010129NIA NIH HHS P50 AG005681NIA NIH HHS P50 AG05681NIA NIH HHS R01 AG035083NIA NIH HHS R01-AG035083NIA NIH HHS U01 AG024904NIA NIH HHS U01 AG032984NIA NIH HHS U01AG032984NINDS NIH HHS P30 NS069329NINDS NIH HHS P30-NS069329-01Wellcome Trust GR082604MA
6 · The paper itself

Abstract

The apolipoprotein E (APOE) genotype is the major genetic risk factor for Alzheimer's disease (AD). We have access to cerebrospinal fluid (CSF) and plasma APOE protein levels from 641 individuals and genome-wide genotyped data from 570 of these samples. The aim of this study was to test whether CSF or plasma APOE levels could be a useful endophenotype for AD and to identify genetic variants associated with APOE levels. We found that CSF (P = 8.15 × 10(-4)) but not plasma (P = 0.071) APOE protein levels are significantly associated with CSF Aβ(42) levels. We used Mendelian randomization and genetic variants as instrumental variables to confirm that the association of CSF APOE with CSF Aβ(42) levels and clinical dementia rating (CDR) is not because of a reverse causation or confounding effect. In addition the association of CSF APOE with Aβ(42) levels was independent of the APOE ε4 genotype, suggesting that APOE levels in CSF may be a useful endophenotype for AD. We performed a genome-wide association study to identify genetic variants associated with CSF APOE levels: the APOE ε4 genotype was the strongest single-genetic factor associated with CSF APOE protein levels (P = 6.9 × 10(-13)). In aggregate, the Illumina chip single nucleotide polymorphisms explain 72% of the variability in CSF APOE protein levels, whereas the APOE ε4 genotype alone explains 8% of the variability. No other genetic variant reached the genome-wide significance threshold, but nine additional variants exhibited a P-value <10(-6). Pathway mining analysis indicated that these nine additional loci are involved in lipid metabolism (P = 4.49 × 10(-9)).

Indexed as

PhenotypeAgedAged, 80 and overAlzheimer DiseaseApolipoproteins ECase-Control StudiesFemaleGenotypeHumansMaleMiddle AgedApolipoproteins E

Identifiers

PMID22821396
PMCPMC3459471
OpenAlexW2147472495

What OpenQuestion holds

Textmetadata
Read underepoch 390

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.