Evidence map›Paper›PMID 30552425›Full record

ArticleEuropean journal of human genetics : EJHG2019

Skewed X-inactivation is common in the general female population.

Ekaterina Shvetsova, Alina Sofronova, Ramin Monajemi, Kristina Gagalova, Harmen H M Draisma, Stefan J White, Gijs W E Santen, Susana M Chuva de Sousa Lopes, Bastiaan T Heijmans, Joyce van Meurs and 7 more

Open access · hybridAbstract read
In one paragraph

Article in European journal of human genetics : EJHG, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 105 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
105citing papers in PubMed, 1 pooled it
8.1field-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

105 citing papers in PubMed, 1 synthesis or guideline pooled it, 178 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Review
  4. Article
  5. Review
  6. Article
  7. Hemophilia's Overlooked Female Face.Journal of clinical medicine · 2026
    Review
  8. Article
  9. Review
  10. Article
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  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Life (Basel, Switzerland) · 2025
    Article

45 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

17 authors at 6 institutions in 2 countries.

Ekaterina ShvetsovaDepartment of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands.
Alina SofronovaDepartment of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands.
Ramin MonajemiDepartment of Biomedical Data Sciences, Leiden University Medical Center, Leiden, The Netherlands.
Kristina GagalovaDepartment of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands.
Harmen H M DraismaDepartment of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands.
Stefan J WhiteDepartment of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands.
Gijs W E SantenDepartment of Clinical Genetics, Leiden University Medical Center, Leiden, The Netherlands.
Susana M Chuva de Sousa LopesDepartment of Anatomy and Embryology, Leiden University Medical Center, Leiden, The Netherlands.
Bastiaan T HeijmansDepartment of Biomedical Data Sciences, Leiden University Medical Center, Leiden, The Netherlands.
Joyce van MeursDepartment of Internal Medicine, ErasmusMC, Rotterdam, The Netherlands.
Rick JansenDepartment of Psychiatry, VU University Medical Center, Neuroscience Campus Amsterdam, Amsterdam, The Netherlands.ORCID http://orcid.org/0000-0002-3333-6737
Lude FrankeUniversity of Groningen, University Medical Center Groningen, Department of Genetics, Groningen, The Netherlands.ORCID http://orcid.org/0000-0002-5159-8802
Szymon M KiełbasaDepartment of Biomedical Data Sciences, Leiden University Medical Center, Leiden, The Netherlands.ORCID http://orcid.org/0000-0003-2805-6535
Johan T den DunnenDepartment of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands.ORCID http://orcid.org/0000-0002-6304-1710
Peter A C 't HoenDepartment of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands. Peter-Bram.tHoen@radboudumc.nl.ORCID http://orcid.org/0000-0003-4450-3112
BIOS consortium
GoNL consortium
Leiden University Medical Center · NLLomonosov Moscow State University · RUAmsterdam Neuroscience · NLErasmus MC · NLRadboud University Nijmegen · NLUniversity Medical Center Groningen · NL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

X-inactivation is a well-established dosage compensation mechanism ensuring that X-chromosomal genes are expressed at comparable levels in males and females. Skewed X-inactivation is often explained by negative selection of one of the alleles. We demonstrate that imbalanced expression of the paternal and maternal X-chromosomes is common in the general population and that the random nature of the X-inactivation mechanism can be sufficient to explain the imbalance. To this end, we analyzed blood-derived RNA and whole-genome sequencing data from 79 female children and their parents from the Genome of the Netherlands project. We calculated the median ratio of the paternal over total counts at all X-chromosomal heterozygous single-nucleotide variants with coverage ≥10. We identified two individuals where the same X-chromosome was inactivated in all cells. Imbalanced expression of the two X-chromosomes (ratios ≤0.35 or ≥0.65) was observed in nearly 50% of the population. The empirically observed skewing is explained by a theoretical model where X-inactivation takes place in an embryonic stage in which eight cells give rise to the hematopoietic compartment. Genes escaping X-inactivation are expressed from both alleles and therefore demonstrate less skewing than inactivated genes. Using this characteristic, we identified three novel escapee genes (SSR4, REPS2, and SEPT6), but did not find support for many previously reported escapee genes in blood. Our collective data suggest that skewed X-inactivation is common in the general population. This may contribute to manifestation of symptoms in carriers of recessive X-linked disorders. We recommend that X-inactivation results should not be used lightly in the interpretation of X-linked variants.

Indexed as

X Chromosome InactivationCalcium-Binding ProteinsFemaleHumansIntracellular Signaling Peptides and ProteinsMaleMembrane GlycoproteinsNetherlandsPolymorphism, Single NucleotidePopulationReceptors, Cytoplasmic and NuclearReceptors, PeptideSeptinsCalcium-Binding ProteinsIntracellular Signaling Peptides and ProteinsMembrane GlycoproteinsReceptors, Cytoplasmic and NuclearReceptors, PeptideREPS2 protein, humanSEPTIN6 protein, humanSeptinssignal sequence receptor

Identifiers

PMID30552425
PMCPMC6460563
OpenAlexW2904197601

What OpenQuestion holds

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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.