Evidence map›Paper›PMID 21296655›Full record

ArticleBrain, behavior, and immunity2011

DNA methylation in repetitive elements and Alzheimer disease.

V Bollati, D Galimberti, L Pergoli, E Dalla Valle, F Barretta, F Cortini, E Scarpini, P A Bertazzi, A Baccarelli

Abstract read
In one paragraph

Article in Brain, behavior, and immunity, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 102 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
102citing papers in PubMed, 4 pooled it
7.2field-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

102 citing papers in PubMed, 4 syntheses or guidelines pooled it, 207 citations in OpenAlex.

  1. Pooled it
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  3. 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
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  5. Review
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  7. Long-read sequencing reveals genomic and epigenomic variation in the dark genome of human Alzheimer's disease.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025
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42 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

9 authors at 2 institutions in 1 country.

V BollatiCenter of Molecular and Genetic Epidemiology, Department of Environmental and Occupational Health, University of Milan, Fondazione Cà Granda, IRCCS Ospedale Maggiore Policlinico, Milan, Italy. valentina.bollati@unimi.it
D Galimberti
L Pergoli
E Dalla Valle
F Barretta
F Cortini
E Scarpini
P A Bertazzi
A Baccarelli
Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico · ITUniversity of Milan · IT

Funding

Translational Research Support CoreP30ES000002 · NIEHS · HARVARD UNIVERSITY (SCH OF PUBLIC HLTH) · PI SUSAN A KORRICK · 1985 to 2026
$44.6M
NIEHS NIH HHS ES000002NIEHS NIH HHS P30 ES000002
6 · The paper itself

Abstract

Epigenetics is believed to play a role in Alzheimer's disease (AD). DNA methylation, the most investigated epigenetic hallmark, is a reversible mechanism that modifies genome function and chromosomal stability through the addition of methyl groups to cytosine located in CpG dinucleotides to form 5 methylcytosine (5mC). Methylation status of repetitive elements (i.e. Alu, LINE-1 and SAT-α) is a major contributor of global DNA methylation patterns and has been investigated in relation to a variety of human diseases. However, the role of methylation of repetitive elements in blood of AD patients has never been investigated so far. In the present study, a quantitative bisulfite-PCR pyrosequencing method was used to evaluate methylation of Alu, LINE-1 and SAT-α sequences in 43 AD patients and 38 healthy donors. In multivariate analysis adjusting for age and gender, LINE-1 was increased in AD patients compared with healthy volunteers (ADs: 83.6%5mC, volunteers: 83.1%5mC, p-value: 0.05). The group with best performances in mini mental state examination (MMSE) showed higher levels of LINE-1 methylation compared to the group with worst performances (MMSE>22: 83.9%5mC; MMSE≤22: 83.2%5mC; p=0.05). Our data suggest that LINE-1 methylation may lead to a better understanding of AD pathogenesis and course, and may contribute to identify novel markers useful to assess risk stratification. Further prospective investigations are warranted to evaluate the dynamics of DNA methylation from early-stage AD to advanced phases of the disease.

Indexed as

DNA MethylationAgedAged, 80 and overAlu ElementsAlzheimer DiseaseAmyloid beta-PeptidesApolipoproteins EDNA, SatelliteFemaleHumansLong Interspersed Nucleotide ElementsMaleMiddle AgedPhosphorylationProtein Processing, Post-TranslationalPsychological TestsAmyloid beta-PeptidesApolipoproteins EDNA, SatelliteMAPT protein, humantau Proteins

Identifiers

PMID21296655
PMCPMC3742099
OpenAlexW2020388524

What OpenQuestion holds

Textmetadata
LicenceTDM
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.