Epigenetic changes of the thioredoxin system in the tx-j mouse model and in patients with Wilson disease

Charles E. Mordaunt, Noreene M. Shibata, Dorothy A. Kieffer, Anna Czlonkowska, Tomasz Litwin, Karl Heinz Weiss, Daniel N. Gotthardt, Kristin A Olson, Dongguang Wei, Stewart Cooper, Yu-Jui Yvonne Wan, Mohamed R Ali, Janine M LaSalle, Valentina Medici

Research output: Contribution to journalArticle

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Abstract

Wilson disease (WD) is caused by mutations in the copper transporter ATP7B, leading to copper accumulation in the liver and brain. Excess copper inhibits S-adenosyl-L-homocysteine hydrolase, leading to variable WD phenotypes from widespread alterations in DNA methylation and gene expression. Previously, we demonstrated that maternal choline supplementation in the Jackson toxic milk (tx-j) mouse model of WD corrected higher thioredoxin 1 (TNX1) transcript levels in fetal liver. Here, we investigated the effect of maternal choline supplementation on genome-wide DNA methylation patterns in tx-j fetal liver by whole-genome bisulfite sequencing (WGBS). Tx-j Atp7b genotype-dependent differences in DNA methylation were corrected by choline for genes including, but not exclusive to, oxidative stress pathways. To examine phenotypic effects of postnatal choline supplementation, tx-j mice were randomized to one of six treatment groups: with or without maternal and/or continued choline supplementation, and with or without copper chelation with penicillamine (PCA) treatment. Hepatic transcript levels of TXN1 and peroxiredoxin 1 (Prdx1) were significantly higher in mice receiving maternal and continued choline with or without PCA treatment compared to untreated mice. A WGBS comparison of human WD liver and tx-j mouse liver demonstrated a significant overlap of differentially methylated genes associated with ATP7B deficiency. Further, eight genes in the thioredoxin (TXN) pathway were differentially methylated in human WD liver samples. In summary, Atp7b deficiency and choline supplementation have a genome-wide impact, including on TXN system-related genes, in tx-j mice. These findings could explain the variability of WD phenotype and suggest new complementary treatment options for WD.

Original languageEnglish (US)
Pages (from-to)3854-3869
Number of pages16
JournalHuman Molecular Genetics
Volume27
Issue number22
DOIs
StatePublished - Nov 15 2018

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Hepatolenticular Degeneration
Thioredoxins
Epigenomics
Choline
Liver
Copper
DNA Methylation
Mothers
Genome
Penicillamine
Genes
Choline Deficiency
Peroxiredoxins
Phenotype
Poisons
Homocysteine
Hydrolases
Milk
Oxidative Stress
Therapeutics

ASJC Scopus subject areas

  • Molecular Biology
  • Genetics
  • Genetics(clinical)

Cite this

Mordaunt, C. E., Shibata, N. M., Kieffer, D. A., Czlonkowska, A., Litwin, T., Weiss, K. H., ... Medici, V. (2018). Epigenetic changes of the thioredoxin system in the tx-j mouse model and in patients with Wilson disease. Human Molecular Genetics, 27(22), 3854-3869. https://doi.org/10.1093/hmg/ddy262

Epigenetic changes of the thioredoxin system in the tx-j mouse model and in patients with Wilson disease. / Mordaunt, Charles E.; Shibata, Noreene M.; Kieffer, Dorothy A.; Czlonkowska, Anna; Litwin, Tomasz; Weiss, Karl Heinz; Gotthardt, Daniel N.; Olson, Kristin A; Wei, Dongguang; Cooper, Stewart; Wan, Yu-Jui Yvonne; Ali, Mohamed R; LaSalle, Janine M; Medici, Valentina.

In: Human Molecular Genetics, Vol. 27, No. 22, 15.11.2018, p. 3854-3869.

Research output: Contribution to journalArticle

Mordaunt, CE, Shibata, NM, Kieffer, DA, Czlonkowska, A, Litwin, T, Weiss, KH, Gotthardt, DN, Olson, KA, Wei, D, Cooper, S, Wan, Y-JY, Ali, MR, LaSalle, JM & Medici, V 2018, 'Epigenetic changes of the thioredoxin system in the tx-j mouse model and in patients with Wilson disease', Human Molecular Genetics, vol. 27, no. 22, pp. 3854-3869. https://doi.org/10.1093/hmg/ddy262
Mordaunt CE, Shibata NM, Kieffer DA, Czlonkowska A, Litwin T, Weiss KH et al. Epigenetic changes of the thioredoxin system in the tx-j mouse model and in patients with Wilson disease. Human Molecular Genetics. 2018 Nov 15;27(22):3854-3869. https://doi.org/10.1093/hmg/ddy262
Mordaunt, Charles E. ; Shibata, Noreene M. ; Kieffer, Dorothy A. ; Czlonkowska, Anna ; Litwin, Tomasz ; Weiss, Karl Heinz ; Gotthardt, Daniel N. ; Olson, Kristin A ; Wei, Dongguang ; Cooper, Stewart ; Wan, Yu-Jui Yvonne ; Ali, Mohamed R ; LaSalle, Janine M ; Medici, Valentina. / Epigenetic changes of the thioredoxin system in the tx-j mouse model and in patients with Wilson disease. In: Human Molecular Genetics. 2018 ; Vol. 27, No. 22. pp. 3854-3869.
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abstract = "Wilson disease (WD) is caused by mutations in the copper transporter ATP7B, leading to copper accumulation in the liver and brain. Excess copper inhibits S-adenosyl-L-homocysteine hydrolase, leading to variable WD phenotypes from widespread alterations in DNA methylation and gene expression. Previously, we demonstrated that maternal choline supplementation in the Jackson toxic milk (tx-j) mouse model of WD corrected higher thioredoxin 1 (TNX1) transcript levels in fetal liver. Here, we investigated the effect of maternal choline supplementation on genome-wide DNA methylation patterns in tx-j fetal liver by whole-genome bisulfite sequencing (WGBS). Tx-j Atp7b genotype-dependent differences in DNA methylation were corrected by choline for genes including, but not exclusive to, oxidative stress pathways. To examine phenotypic effects of postnatal choline supplementation, tx-j mice were randomized to one of six treatment groups: with or without maternal and/or continued choline supplementation, and with or without copper chelation with penicillamine (PCA) treatment. Hepatic transcript levels of TXN1 and peroxiredoxin 1 (Prdx1) were significantly higher in mice receiving maternal and continued choline with or without PCA treatment compared to untreated mice. A WGBS comparison of human WD liver and tx-j mouse liver demonstrated a significant overlap of differentially methylated genes associated with ATP7B deficiency. Further, eight genes in the thioredoxin (TXN) pathway were differentially methylated in human WD liver samples. In summary, Atp7b deficiency and choline supplementation have a genome-wide impact, including on TXN system-related genes, in tx-j mice. These findings could explain the variability of WD phenotype and suggest new complementary treatment options for WD.",
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AU - Medici, Valentina

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AB - Wilson disease (WD) is caused by mutations in the copper transporter ATP7B, leading to copper accumulation in the liver and brain. Excess copper inhibits S-adenosyl-L-homocysteine hydrolase, leading to variable WD phenotypes from widespread alterations in DNA methylation and gene expression. Previously, we demonstrated that maternal choline supplementation in the Jackson toxic milk (tx-j) mouse model of WD corrected higher thioredoxin 1 (TNX1) transcript levels in fetal liver. Here, we investigated the effect of maternal choline supplementation on genome-wide DNA methylation patterns in tx-j fetal liver by whole-genome bisulfite sequencing (WGBS). Tx-j Atp7b genotype-dependent differences in DNA methylation were corrected by choline for genes including, but not exclusive to, oxidative stress pathways. To examine phenotypic effects of postnatal choline supplementation, tx-j mice were randomized to one of six treatment groups: with or without maternal and/or continued choline supplementation, and with or without copper chelation with penicillamine (PCA) treatment. Hepatic transcript levels of TXN1 and peroxiredoxin 1 (Prdx1) were significantly higher in mice receiving maternal and continued choline with or without PCA treatment compared to untreated mice. A WGBS comparison of human WD liver and tx-j mouse liver demonstrated a significant overlap of differentially methylated genes associated with ATP7B deficiency. Further, eight genes in the thioredoxin (TXN) pathway were differentially methylated in human WD liver samples. In summary, Atp7b deficiency and choline supplementation have a genome-wide impact, including on TXN system-related genes, in tx-j mice. These findings could explain the variability of WD phenotype and suggest new complementary treatment options for WD.

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