Evidence map›Paper›PMID 21862626›Full record

ArticleGenome research2011

DNA methylation profiles of human active and inactive X chromosomes.

Andrew J Sharp, Elisavet Stathaki, Eugenia Migliavacca, Manisha Brahmachary, Stephen B Montgomery, Yann Dupre, Stylianos E Antonarakis

Open access · bronzeAbstract read
In one paragraph

Article in Genome research, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 183 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
183citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

183 citing papers in PubMed, 1 synthesis or guideline pooled it, 319 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Article
  4. Review
  5. Review
  6. Review
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Epigenetic alterations in Myeloid Malignancies.Advances in experimental medicine and biology · 2026
    Review
  13. Review
  14. Article
  15. Review
  16. Review
  17. A Thiopurine-like Mutagenic Process Defines TGCT Subtypes.bioRxiv : the preprint server for biology · 2025
    Article
  18. DNA Methylation ofBiology · 2025
    Article
  19. Review
  20. Article

123 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

7 authors at 2 institutions in 2 countries.

Andrew J SharpDepartment of Genetic Medicine and Development, University of Geneva, 1211 Geneva 4, Switzerland. andrew.sharp@mssm.edu
Elisavet Stathaki
Eugenia Migliavacca
Manisha Brahmachary
Stephen B Montgomery
Yann Dupre
Stylianos E Antonarakis
University of Geneva · CHIcahn School of Medicine at Mount Sinai · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

X-chromosome inactivation (XCI) is a dosage compensation mechanism that silences the majority of genes on one X chromosome in each female cell. To characterize epigenetic changes that accompany this process, we measured DNA methylation levels in 45,X patients carrying a single active X chromosome (X(a)), and in normal females, who carry one X(a) and one inactive X (X(i)). Methylated DNA was immunoprecipitated and hybridized to high-density oligonucleotide arrays covering the X chromosome, generating epigenetic profiles of active and inactive X chromosomes. We observed that XCI is accompanied by changes in DNA methylation specifically at CpG islands (CGIs). While the majority of CGIs show increased methylation levels on the X(i), XCI actually results in significant reductions in methylation at 7% of CGIs. Both intra- and inter-genic CGIs undergo epigenetic modification, with the biggest increase in methylation occurring at the promoters of genes silenced by XCI. In contrast, genes escaping XCI generally have low levels of promoter methylation, while genes that show inter-individual variation in silencing show intermediate increases in methylation. Thus, promoter methylation and susceptibility to XCI are correlated. We also observed a global correlation between CGI methylation and the evolutionary age of X-chromosome strata, and that genes escaping XCI show increased methylation within gene bodies. We used our epigenetic map to predict 26 novel genes escaping XCI, and searched for parent-of-origin-specific methylation differences, but found no evidence to support imprinting on the human X chromosome. Our study provides a detailed analysis of the epigenetic profile of active and inactive X chromosomes.

Indexed as

DNA MethylationX Chromosome InactivationChromosome MappingChromosomes, Human, XCpG IslandsFemaleGenes, X-LinkedGenomic ImprintingHumansOligonucleotide Array Sequence AnalysisPromoter Regions, GeneticTurner Syndrome

Identifiers

PMID21862626
PMCPMC3202277
OpenAlexW2124359985

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.