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  Persistent epigenetic memory impedes rescue of the telomeric phenotype in human ICF iPSCs following DNMT3B correction

Toubiana, S., Gagliardi, M., Papa, M., Manco, R., Tzukerman, M., Matarazzo, M. R., et al. (2019). Persistent epigenetic memory impedes rescue of the telomeric phenotype in human ICF iPSCs following DNMT3B correction. eLife, 8: e47859. doi:10.7554/eLife.47859.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-F982-F Version Permalink: http://hdl.handle.net/21.11116/0000-0005-F983-E
Genre: Journal Article

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 Creators:
Toubiana, Shir, Author
Gagliardi, Miriam1, Author              
Papa, Mariarosaria, Author
Manco, Roberta, Author
Tzukerman, Maty, Author
Matarazzo, Maria R., Author
Selig, Sara, Author
Affiliations:
1RG Genomics of Complex Diseases, Max Planck Institute of Psychiatry, Max Planck Society, ou_3008285              

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 Abstract: DNA methyltransferase 3B (DNMT3B) is the major DNMT that methylates mammalian genomes during early development. Mutations in human DNMT3B disrupt genome-wide DNA methylation patterns and result in ICF syndrome type 1 (ICF1). To study whether normal DNA methylation patterns may be restored in ICF1 cells, we corrected DNMT3B mutations in induced pluripotent stem cells from ICF1 patients. Focusing on repetitive regions, we show that in contrast to pericentromeric repeats, which reacquire normal methylation, the majority of subtelomeres acquire only partial DNA methylation and, accordingly, the ICF1 telomeric phenotype persists. Subtelomeres resistant to de novo methylation were characterized by abnormally high H3K4 trimethylation (H3K4me3), and short-term reduction of H3K4me3 by pharmacological intervention partially restored subtelomeric DNA methylation. These findings demonstrate that the abnormal epigenetic landscape established in ICF1 cells restricts the recruitment of DNMT3B, and suggest that rescue of epigenetic diseases with genome-wide disruptions will demand further manipulation beyond mutation correction.

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Language(s): eng - English
 Dates: 2019-11-18
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: ISI: 000501530800001
DOI: 10.7554/eLife.47859
 Degree: -

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Title: eLife
Source Genre: Journal
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Publ. Info: Cambridge : eLife Sciences Publications
Pages: - Volume / Issue: 8 Sequence Number: e47859 Start / End Page: - Identifier: ISSN: 2050-084X
CoNE: https://pure.mpg.de/cone/journals/resource/2050-084X