Cited by 34Genetic and Clinical Aspects of Sex Determination and Chromosomal AbnormalitiesSexual Differentiation and DisordersEpigenetics and DNA Methylation

X chromosome dosage and the genetic impact across human tissues

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Viuff, Mette, Skakkebæk, Anne, Johannsen, Emma B., Chang, Simon, Pedersen, Steen Bønlykke, Lauritsen, Katrine Meyer, Pedersen, Mette Glavind Bülow, Trolle, Christian +2 more·2023·Genome Medicine

Abstract

BACKGROUND: Sex chromosome aneuploidies (SCAs) give rise to a broad range of phenotypic traits and diseases. Previous studies based on peripheral blood samples have suggested the presence of ripple effects, caused by altered X chromosome number, affecting the methylome and transcriptome. Whether these alterations can be connected to disease-specific tissues, and thereby having clinical implication for the phenotype, remains to be elucidated. METHODS: We performed a comprehensive analysis of X chromosome number on the transcriptome and methylome in blood, fat, and muscle tissue from individuals with 45,X, 46,XX, 46,XY, and 47,XXY. RESULTS: X chromosome number affected the transcriptome and methylome globally across all chromosomes in a tissue-specific manner. Furthermore, 45,X and 47,XXY demonstrated a divergent pattern of gene expression and methylation, with overall gene downregulation and hypomethylation in 45,X and gene upregulation and hypermethylation in 47,XXY. In fat and muscle, a pronounced effect of sex was observed. We identified X chromosomal genes with an expression pattern different from what would be expected based on the number of X and Y chromosomes. Our data also indicate a regulatory function of Y chromosomal genes on X chromosomal genes. Fourteen X chromosomal genes were downregulated in 45,X and upregulated in 47,XXY, respectively, in all three tissues (AKAP17A, CD99, DHRSX, EIF2S3, GTPBP6, JPX, KDM6A, PP2R3B, PUDP, SLC25A6, TSIX, XIST, ZBED1, ZFX). These genes may be central in the epigenetic and genomic regulation of sex chromosome aneuploidies. CONCLUSION: We highlight a tissue-specific and complex effect of X chromosome number on the transcriptome and methylome, elucidating both shared and non-shared gene-regulatory mechanism between SCAs.

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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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  1. [62]SLC16A2 solute carrier family 16 member 2 [Homo sapiens (human)]. 2022. Available from: https://www.ncbi.nlm.nih.gov/gene/6567.
  2. [63]Sarret C, Oliver Petit I, Tonduti D, et al. Allan-Herndon-Dudley Syndrome. In: Adam MP, Ardinger HH, Pagon RA, Wallace SE, Bean LJH, Gripp KW, et al., editors. GeneReviews(®). Seattle: University of Washington, Seattle; 1993. (Copyright © 1993-2022). 20301789

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Authors
Viuff, M., Skakkebæk, A., Johannsen, E. B., Chang, S., Pedersen, S. B., Lauritsen, K. M., Pedersen, M. G. B., Trolle, C., Just, J., & Gravholt, C. H.
Affiliations
  • Aarhus University (DK)
  • Aarhus University Hospital (DK)
Corresponding author
Viuff, Mette
Venue
Genome Medicine
Published
2023-03-28
Volume
15
Issue
1
Pages
21-21
ISSN
1756-994X (ISSN-L)
OpenAlex
W4361218701
Cited by
34
References
72
Citations by year
2026: 7 · 2025: 11 · 2024: 12 · 2023: 4
FWCI
5.64
Type
journal article
Language
en
Open access
Locations
  • Genome Medicine (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Sundhedsvidenskabelige Fakultet, Aarhus Universitet
  • Novo Nordisk ((NNF15OC0016474, NNF20OC0060610))
  • Sundhed og Sygdom, Det Frie Forskningsråd ((0134-00130B), (0134-00406A))
  • Fonden til Lægevidenskabens Fremme
  • Familien Hede Nielsens Fond
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 › Sexual Differentiation and Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
Keywords
X chromosome dosage, sex chromosome aneuploidy, 45,X, Klinefelter syndrome, X chromosome number, transcriptome, DNA methylation, tissue-specific gene regulation, Y chromosome genes, XIST, Tsix, KDM6A, ZFX, hypomethylation, hypermethylation, gene downregulation, gene upregulation, adipose tissue, skeletal muscle, blood
MeSH terms
Aneuploidy, Humans, Phenotype, Sex Chromosome Aberrations, Transcription Factors, X Chromosome, Y Chromosome, GTP-Binding Proteins

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