Cited by 81Genetic and Clinical Aspects of Sex Determination and Chromosomal AbnormalitiesEpigenetics and DNA MethylationGenetic Syndromes and Imprinting

DNA methylation signature in peripheral blood reveals distinct characteristics of human X chromosome numerical aberrations

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Sharma, Amit, Jamil, Muhammad Ahmer, Nuesgen, Nicole, Schreiner, Felix, Priebe, Lutz, Hoffmann, Per, Herns, Stefan, Nöthen, Markus M. +4 more·2015·Clinical Epigenetics

Abstract

BACKGROUND: Abnormal sex chromosome numbers in humans are observed in Turner (45,X) and Klinefelter (47,XXY) syndromes. Both syndromes are associated with several clinical phenotypes, whose molecular mechanisms are obscure, and show a range of inter-individual penetrance. In order to understand the effect of abnormal numbers of X chromosome on the methylome and its correlation to the variable clinical phenotype, we performed a genome-wide methylation analysis using MeDIP and Illumina's Infinium assay on individuals with four karyotypes: 45,X, 46,XY, 46,XX, and 47,XXY. RESULTS: DNA methylation changes were widespread on all autosomal chromosomes in 45,X and in 47,XXY individuals, with Turner individuals presenting five times more affected loci. Differentially methylated CpGs, in most cases, have intermediate methylation levels and tend to occur outside CpG islands, especially in individuals with Turner syndrome. The X inactivation process appears to be less effective in Klinefelter syndrome as methylation on the X was decreased compared to normal female samples. In a large number of individuals, we verified several loci by pyrosequencing and observed only weak inter-loci correlations between the verified regions. This suggests a certain stochastic/random contribution to the methylation changes at each locus. Interestingly, methylation patterns on some PAR2 loci differ between male and Turner syndrome individuals and between female and Klinefelter syndrome individuals, which possibly contributed to this distinguished and unique autosomal methylation patterns in Turner and Klinefelter syndrome individuals. CONCLUSIONS: The presented data clearly show that gain or loss of an X chromosome results in different epigenetic effects, which are not necessary opposite.

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  • There is evidence of a unique and tissue-specific genome-wide methylation and transcription landscape in TS extending to both the X chromosome and the autosomes.

    “There is evidence of a unique and tissue-specific genome-wide methylation and transcription landscape in TS extending to both the X chromosome and the autosomes.103-109”

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Authors
Sharma, A., Jamil, M. A., Nuesgen, N., Schreiner, F., Priebe, L., Hoffmann, P., Herns, S., Nöthen, M. M., Fröhlich, H., Oldenburg, J., Woelfle, J., & El-Maarri, O.
Affiliations
University of Bonn (DE)
Venue
Clinical Epigenetics
Published
2015-07-28
Volume
7
Issue
1
Pages
76-76
ISSN
  • 1868-7075 (ISSN-L)
  • 1868-7083
OpenAlex
W2099864996
Cited by
81
References
56
Citations by year
2026: 2 · 2025: 7 · 2024: 4 · 2023: 10 · 2022: 8 · 2021: 13 · 2020: 15 · 2019: 9 · 2018: 6 · 2017: 5 · 2016: 2
FWCI
2.96
Type
journal article
Language
en
Open access
Locations
  • Clinical Epigenetics (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Syndromes and Imprinting
Keywords
DNA methylation, Turner syndrome, Klinefelter syndrome, sex chromosome aneuploidy, X chromosome inactivation, differentially methylated CpGs, peripheral blood, penetrance

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