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HDAC inhibition suppresses telomerase activity in neuroblastoma cells harboring TERT rearrangements

ABSTRACT: This SuperSeries is composed of the SubSeries listed below.

ORGANISM(S): Homo sapiens

PROVIDER: GSE155707 | GEO | 2022/08/04

REPOSITORIES: GEO

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HDAC inhibition suppresses telomerase activity in neuroblastoma cells harboring TERT rearrangements [array]

Project description:Genome wide DNA methylation profiling of high-risk TERT-rearranged neuroblastoma cells treated with solvent or HDAC inhibitor panobinostat. The Illumina HumanMethylation EPIC Beadchip was used to obtain DNA methylation profiles. Samples included 3 solvent treated samples and 3 panobinostat-treated samples after 18 h of treatment.

2022-08-04 | GSE155703 | GEO

HDAC inhibition suppresses telomerase activity in neuroblastoma cells harboring TERT rearrangements [ChIP-Seq]

Project description:We report the application of single-molecule-based sequencing technology for high-throughput profiling of histone modifications in mammalian cells. The three histone marks acetylation of histone 3 at lysine residue 27 (H3K27ac), trimethylation of histone 3 at lysine residue 4 (H3K4me3) and trimethylation of histone 3 at lysine residue 36 (H3K36me3) were selected, representing marks for an open chromatin structure and enable gene transcription. The two histone marks standing for a condensed chromatin state and disabled gene transcription trimethylation of histone 3 at lysine residue 27 (H3K27me3) and trimethylation of histone 3 at lysine residue 9 (H3K9me3) were chosen. ChIP sequencing of the five histone marks was investigated in high-risk TERT-rearranged neuroblastoma GI-ME-N cells treated with solvent or HDAC inhibitor panobinostat. Exemplary samples include solvent-treated and panobinostat-treated samples after 18 h of treatment.

2022-08-04 | GSE155705 | GEO

Telomerase activation by genomic rearrangements in high-risk neuroblastoma.

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TERT rearrangements are frequent in neuroblastoma and identify aggressive tumors

Project description:Whole genome sequencing detected structural rearrangements of TERT in 17/75 high stage neuroblastoma with 5 cases resulting from chromothripsis. Rearrangements were associated with increased TERT expression and targeted immediate up- and down-stream regions of TERT, placing in 7 cases a super-enhancer close to the breakpoints. TERT rearrangements (23%), ATRX deletions (11%) and MYCN amplifications (37%) identify three almost non-overlapping groups of high stage neuroblastoma, each associated with very poor prognosis

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Zinc protoporphyrin binding to telomerase complexes and inhibition of telomerase activity.

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