Evidence map›Paper›PMID 23892237›Full record

ArticleHuman molecular genetics2013

Epigenetic signature and enhancer activity of the human APOE gene.

Chang-En Yu, Eiron Cudaback, Jessica Foraker, Zachary Thomson, Lesley Leong, Franziska Lutz, James Anthony Gill, Aleen Saxton, Brian Kraemer, Patrick Navas and 3 more

Open access · bronzeAbstract read
In one paragraph

Article in Human molecular genetics, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 42 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
42citing papers in PubMed, 1 pooled it
3.9field-weighted citation impact, top 6% 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

42 citing papers in PubMed, 1 synthesis or guideline pooled it, 69 citations in OpenAlex.

  1. Blood DNA methylation as a potential biomarker of dementia: A systematic review.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2018
    Pooled it
  2. Article
  3. Interplay Between 3D Chromatin Architecture and Gene Regulation at theInternational journal of molecular sciences · 2025
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  17. Differential Methylation inInternational journal of molecular sciences · 2019
    Article
  18. Review
  19. Article
  20. Article
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 2 countries.

Chang-En YuGeriatric Research, Education, and Clinical Center, VA Puget Sound Health Care System, Seattle, WA 98108, USA.
Eiron Cudaback
Jessica Foraker
Zachary Thomson
Lesley Leong
Franziska Lutz
James Anthony Gill
Aleen Saxton
Brian Kraemer
Patrick Navas
C Dirk Keene
Thomas Montine
Lynn M Bekris
Geriatric Research Education and Clinical Center · USVA Puget Sound Health Care System · USUniversity of Washington · USMedical Genetics Center · DE

Funding

THERAPEUTIC EFFECTS OF INTRA-NASAL INSULIN DETEMIRP50AG005136 · NIA · UNIVERSITY OF WASHINGTON · PI WIJSMAN, ELLEN M · 1985 to 2019
$57.2M
NEUROBEHAVIOR, NEUROENDOCRINOLOGY, AND GENETICS OF ADT32AG000258 · NIA · UNIVERSITY OF WASHINGTON · PI MONTINE, THOMAS J · 1999 to 2013
$4.7M
Biomarker Expression and Regulatory Haplotypes in Alzheimer's DiseaseR00AG034214 · NIA · UNIVERSITY OF WASHINGTON · PI BEKRIS, LYNN · 2012 to 2014
$725k
Biomarker Expression and Regulatory Haplotypes in Alzheimer's DiseaseK99AG034214 · NIA · UNIVERSITY OF WASHINGTON · PI BEKRIS, LYNN · 2010 to 2011
$254k
BLRD VA I01 BX000933NIA NIH HHS K99 AG034214NIA NIH HHS K99 AG34214NIA NIH HHS P50 AG005136NIA NIH HHS P50 AG05136NIA NIH HHS R00 AG034214NIA NIH HHS T32 AG000258
6 · The paper itself

Abstract

The human apolipoprotein E (APOE) gene plays an important role in lipid metabolism. It has three common genetic variants, alleles ε2/ε3/ε4, which translate into three protein isoforms of apoE2, E3 and E4. These isoforms can differentially influence total serum cholesterol levels; therefore, APOE has been linked with cardiovascular disease. Additionally, its ε4 allele is strongly associated with the risk of Alzheimer's disease (AD), whereas the ε2 allele appears to have a modest protective effect for AD. Despite decades of research having illuminated multiple functional differences among the three apoE isoforms, the precise mechanisms through which different APOE alleles modify diseases risk remain incompletely understood. In this study, we examined the genomic structure of APOE in search for properties that may contribute novel biological consequences to the risk of disease. We identify one such element in the ε2/ε3/ε4 allele-carrying 3'-exon of APOE. We show that this exon is imbedded in a well-defined CpG island (CGI) that is highly methylated in the human postmortem brain. We demonstrate that this APOE CGI exhibits transcriptional enhancer/silencer activity. We provide evidence that this APOE CGI differentially modulates expression of genes at the APOE locus in a cell type-, DNA methylation- and ε2/ε3/ε4 allele-specific manner. These findings implicate a novel functional role for a 3'-exon CGI and support a modified mechanism of action for APOE in disease risk, involving not only the protein isoforms but also an epigenetically regulated transcriptional program at the APOE locus driven by the APOE CGI.

Indexed as

Enhancer Elements, GeneticEpigenesis, GeneticTranscriptomeApolipoproteins EBase CompositionBase SequenceBrainCell LineCpG IslandsDNA MethylationExonsGene Expression RegulationGene OrderHumansMolecular Sequence DataPromoter Regions, GeneticApolipoproteins E

Identifiers

PMID23892237
PMCPMC3836480
OpenAlexW2157262074

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.