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An atlas of endogenous DNA double-strand breaks arising during neural cell fate determination

ABSTRACT: Profiling of endogenous DNA double-strand breaks during neural cell fate determination using sBLISS.

PROVIDER: PRJEB49370 | ENA |

REPOSITORIES: ENA

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An atlas of endogenous DNA double-strand breaks arising during human neural cell fate determination.

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Double-strand breaks in spo11 mutants

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Doxorubicin induces double-strand breaks at CpG island promoters

Project description:Doxorubicin is a widely used chemotherapeutic drug that intercalates between DNA base-pairs and posions Topoisomerase II, although the mechanistic basis for cell killing remains speculative. Here we show that both anthracyclines and Topoisomerase II poison cause enhanced DNA double-strand breaks around CpG island promoters of active genes genome-wide. We propose that torsion-based enhancement of nucleosome turnover exposes promoter DNA, ultimately causing DNA breaks around promoters that contributes to cell killing. We have analyzed mouse squamous cell carcinoma cells treated with doxorubicin, aclarubicin and etoposide. The direct in situ Breaks Labeling, Enrichment on Streptavidin (BLESS, PMID 23503052) method was used for mapping DNA double-strand breaks genome-wide.

2015-01-31 | E-GEOD-62927 | biostudies-arrayexpress

Genome-wide maps of double-strand breaks

Project description:Mapping physiological double strand breaks (DSBs) in cancer cells uncovers transcription-coupled repair mechanism at oncogenic super-enhancers in which RAD51 of the homologous recombination pathway plays a key role supporting the hyper-transcription of related oncogenes.

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Genome-wide maps of double-strand breaks

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DNA double-strand breaks induced by high NaCl occur predominantly in gene deserts

Project description:High concentration of NaCl increases DNA breaks both in cell culture and in vivo. The breaks remain elevated as long as NaCl concentration remains high and are rapidly repaired when the concentration is lowered. Repair of the breaks after NaCl is reduced is accompanied by formation of foci containing phosphorylated H2AX (γH2AX), which occurs around DNA double-strand breaks and contributes to their repair. By chromatin immunoprecipitation using anti-γH2AX antibody, followed by massive parallel sequencing (ChIP-Seq), we find that during repair of double–strand breaks induced by high NaCl, γH2AX is predominantly localized to regions of the genome devoid of genes (“gene deserts”), indicating that the high NaCl-induced double-strand breaks are located there. Localization to gene deserts helps explain why the DNA breaks are less harmful than are the random breaks induced by genotoxic agents such as UV radiation, ionizing radiation and oxidants. We propose that the universal presence of NaCl around animal cells has directly influenced the evolution of the structure of their genomes.

2011-11-21 | GSE32882 | GEO

Doxorubicin induces double-strand breaks at CpG island promoters

2015-01-31 | GSE62927 | GEO

DNA double-strand breaks induced by high NaCl occur predominantly in gene deserts

Project description:High concentration of NaCl increases DNA breaks both in cell culture and in vivo. The breaks remain elevated as long as NaCl concentration remains high and are rapidly repaired when the concentration is lowered. Repair of the breaks after NaCl is reduced is accompanied by formation of foci containing phosphorylated H2AX (M-NM-3H2AX), which occurs around DNA double-strand breaks and contributes to their repair. By chromatin immunoprecipitation using anti-M-NM-3H2AX antibody, followed by massive parallel sequencing (ChIP-Seq), we find that during repair of doubleM-bM-^@M-^Sstrand breaks induced by high NaCl, M-NM-3H2AX is predominantly localized to regions of the genome devoid of genes (M-bM-^@M-^\gene desertsM-bM-^@M-^]), indicating that the high NaCl-induced double-strand breaks are located there. Localization to gene deserts helps explain why the DNA breaks are less harmful than are the random breaks induced by genotoxic agents such as UV radiation, ionizing radiation and oxidants. We propose that the universal presence of NaCl around animal cells has directly influenced the evolution of the structure of their genomes. ChIP-Seq experiment to find locations of M-NM-3H2AX in mouse genome

2011-11-21 | E-GEOD-32882 | biostudies-arrayexpress

Meiotic DNA double strand breaks in wild-type and set1∆ cells

Project description:In relation with the study of the meiotic dynamic of H3K4 methylation, we determined the meiotic Double Strand Breaks (DSB) profiles of wild-type and set1∆ cells.

2008-11-01 | GSE12879 | GEO

Spo11-oligo mapping of double-strand breaks in spo11 mutants

Project description:The Spo11-generated double-strand breaks (DSBs) that initiate meiotic recombination are non-randomly distributed across the genome. Here, we use Spo11-oligonucleotide complexes to map the distribution of meiotic DSBs in a spo11 mutant strain of Saccharomyces cerevisiae.

2020-05-12 | GSE150314 | GEO

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