Evidence map›Paper›PMID 21311577›Full record

ArticlePloS one2011

Methylation at global LINE-1 repeats in human blood are affected by gender but not by age or natural hormone cycles.

Osman El-Maarri, Maja Walier, Frank Behne, Jan van Üüm, Heike Singer, Amalia Diaz-Lacava, Nicole Nüsgen, Barbara Niemann, Matthias Watzka, Jochen Reinsberg and 5 more

Erratum issuedOpen access · goldAbstract read
In one paragraph

Article in PloS one, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 62 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
62citing papers in PubMed, 1 pooled it
3.6field-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

62 citing papers in PubMed, 1 synthesis or guideline pooled it, 84 citations in OpenAlex.

  1. Pooled it
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  7. Effects of DNA methylation on cardiometabolic risk factors: a systematic review and meta-analysis.Archives of public health = Archives belges de sante publique · 2022
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2 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

15 authors at 2 institutions in 1 country.

Osman El-MaarriInstitute of Experimental Hematology and Transfusion Medicine, University of Bonn, Bonn, Germany. osman.elmaarri@ukb.uni-bonn.de
Maja Walier
Frank Behne
Jan van Üüm
Heike Singer
Amalia Diaz-Lacava
Nicole Nüsgen
Barbara Niemann
Matthias Watzka
Jochen Reinsberg
Hans van der Ven
Thomas Wienker
Birgit Stoffel-Wagner
Rainer Schwaab
Johannes Oldenburg
University of Bonn · DEInstitut für Medizinische Biometrie, Informatik und Epidemiologie · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Previously, we reported on inter-individual and gender specific variations of LINE-1 methylation in healthy individuals. In this study, we investigated whether this variability could be influenced by age or sex hormones in humans. To this end, we studied LINE-1 methylation in vivo in blood-derived DNA from individuals aged 18 to 64 years and from young healthy females at various hormone levels during the menstrual cycle. Our results show that no significant association with age was observed. However, the previously reported increase of LINE-1 methylation in males was reconfirmed. In females, although no correlation between LINE-1 or Alu methylation and hormone levels was observed, a significant stable individual specific level of methylation was noted. In vitro results largely confirmed these findings, as neither estrogen nor dihydrotestosterone affected LINE-1 or Alu methylation in Hek293T, HUVEC, or MDA-kb2 cell lines. In contrast, a decrease in methylation was observed in estrogen-treated T47-Kbluc cell lines strongly expressing estrogen receptor. The very low expression of estrogen receptor in blood cells could explain the observed insensitivity of methylation at LINE-1 to natural hormonal variations in females. In conclusion, neither natural cycle of hormones nor age has a detectable effect on the LINE-1 methylation in peripheral blood cells, while gender remains an important factor.

Indexed as

DNA MethylationAdolescentAdultAge FactorsBloodCell LineDNAFemaleGonadal Steroid HormonesHumansLong Interspersed Nucleotide ElementsMaleMiddle AgedReceptors, EstrogenSex FactorsYoung AdultDNAGonadal Steroid HormonesReceptors, Estrogen

Identifiers

PMID21311577
PMCPMC3023801
OpenAlexW2011951374

What OpenQuestion holds

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LicenceCC BY
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.