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Quantitative analysis of proliferative and Ras-induced senescent human primary fibroblasts transcriptomes

ABSTRACT: The goals of this study is to analyse transcriptionnal changes in senescent cells and to compare them with ChIPseq data for several histones marks and proteins of the SUMO machinery

ORGANISM(S): Homo sapiens

PROVIDER: GSE42212 | GEO | 2013/07/24

SECONDARY ACCESSION(S): PRJNA179305

REPOSITORIES: GEO

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Quantitative analysis of proliferative and Ras-induced senescent human primary fibroblasts transcriptomes

Project description:The goals of this study is to analyse transcriptionnal changes in senescent cells and to compare them with ChIPseq data for several histones marks and proteins of the SUMO machinery mRNA profiling of proliferative versus Ras-induced senescent humain primary fibroblasts 5 days post-infection

2013-07-24 | E-GEOD-42212 | biostudies-arrayexpress

Sumoylation at Chromatin Governs Coordinated Repression of a Transcriptionnal Program Essential for Cell Growth and Proliferation 3

Project description:mRNA profiling of WI38 expressing shCt or shUbc9 4 days post-infection. The goals of this study is to analyse transcriptionnal changes in cells were sumoylation pathway is inactivated and to compare them with ChIPseq data for several histones marks and proteins of the SUMO machinery.

2013-11-25 | E-MEXP-3778 | biostudies-arrayexpress

Genome wide occupancy of SUMO machinery in proliferative and Ras-induced senescent human primary fibroblasts

Project description:Transcription factors represent one of the largest groups of proteins regulated by SUMO, and their modification has generally been correlated with transcriptional repression. However, as most of the studies focus on specific sumoylated transcriptional regulators, the distribution and global role of SUMO on chromatin in relation to transcription regulation remain largely unknown. To investigate this role, we determined the occupancy of SUMO machinery proteins on chromatin by ChIP coupled to sequencing in human primary cells. Examination of 3 histone modifications, Polymerase II, SUMO1, SUMO2, Ubc9 and PIASy in proliferative and Ras-induced senescent fibroblasts.

2013-07-24 | E-GEOD-42211 | biostudies-arrayexpress

Sumoylation at Chromatin Governs Coordinated Repression of a Transcriptionnal Program Essential for Cell Growth and Proliferation

Project description:mRNA profiling of WI38 wild-type or overexpressiong the SUMO E3 ligase PIASy in human primary fibroblasts 24h post-infection. The goal of this study is to analyse transcriptional changes in cells over-expressing the SUMO E3 ligase PIASy and to compare them with ChIPseq data for several histones marks and proteins of the SUMO machinery including PIASy

2013-11-25 | E-MEXP-3776 | biostudies-arrayexpress

Genome wide occupancy of SUMO machinery in proliferative and Ras-induced senescent human primary fibroblasts

2013-07-24 | GSE42211 | GEO

Sumoylation at Chromatin Governs Coordinated Repression of a Transcriptionnal Program Essential for Cell Growth and Proliferation 2

Project description:mRNA profiling of proliferative versus Ras-induced senescent human primary fibroblasts 5 days post-infection. The goals of this study is to analyse transcriptional changes in senescent cells (RASv12 infected cells)

2013-11-25 | E-MEXP-3777 | biostudies-arrayexpress

Histone chaperone HIRA orchestrates H4K16ac-decorated dynamic chromatin in senescent cells and is required for suppression of oncogene-induced neoplasia.

Project description:Cellular senescence is a stable proliferation arrest that suppresses tumorigenesis. Histone chaperone HIRA deposits nucleosome-destabilizing histone variant H3.3 into chromatin in a DNA replication-independent manner. Histone H3.3 and a subset of other typically M-bM-^@M-^\replication-dependentM-bM-^@M-^] core histones were expressed in non-proliferating senescent cells, the latter linked to alternative mRNA splicing and polyadenylation. Senescent cells incorporated newly-synthesized histones into chromatin, partially dependent on HIRA. HIRA and newly-deposited histone H3.3 co-localized at promoters of expressed genes, and their distribution shifted between proliferating and senescent cells, paralleling changes in gene expression. In senescent cells, gene promoters showed exceptional enrichment of a histone acetylation linked to open and dynamic chromatin, H4K16ac. Abundance of H4K16ac depended on HIRA. In the mouse, inactivation of HIRA downregulated H4K16ac and dramatically enhanced oncogene-induced hyperplasia. To conclude, HIRA controls a previously undefined dynamic non-canonical H4K16ac-decorated chromatin landscape in senescence, and also plays an unanticipated role in suppression of oncogene-induced neoplasia. Examination of HIRA protein binding alongside histone modification H4K16ac and H3.3 in proliferating and senescent IMR90 cells

2014-11-26 | E-GEOD-56307 | biostudies-arrayexpress

Histone chaperone HIRA orchestrates H4K16ac-decorated dynamic chromatin in senescent cells and is required for suppression of oncogene-induced neoplasia.

Project description:Cellular senescence is a stable proliferation arrest that suppresses tumorigenesis. Histone chaperone HIRA deposits nucleosome-destabilizing histone variant H3.3 into chromatin in a DNA replication-independent manner. Histone H3.3 and a subset of other typically “replication-dependent” core histones were expressed in non-proliferating senescent cells, the latter linked to alternative mRNA splicing and polyadenylation. Senescent cells incorporated newly-synthesized histones into chromatin, partially dependent on HIRA. HIRA and newly-deposited histone H3.3 co-localized at promoters of expressed genes, and their distribution shifted between proliferating and senescent cells, paralleling changes in gene expression. In senescent cells, gene promoters showed exceptional enrichment of a histone acetylation linked to open and dynamic chromatin, H4K16ac. Abundance of H4K16ac depended on HIRA. In the mouse, inactivation of HIRA downregulated H4K16ac and dramatically enhanced oncogene-induced hyperplasia. To conclude, HIRA controls a previously undefined dynamic non-canonical H4K16ac-decorated chromatin landscape in senescence, and also plays an unanticipated role in suppression of oncogene-induced neoplasia.

2014-11-26 | GSE56307 | GEO

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Project description:N6-methyladenosine (m6A) is the most prevalent modification of eukaryotic cells st post-transcriptional level. The goals of this study are to compare the N6-methyladenosine modification of transcripts in normal and senescent nucleus pulposus cells using Me-RIP-seq

2022-03-23 | GSE169484 | GEO

High-throughput sequencing of AGO-immunoprecipitating miRs in human senescent fibroblast WI-38

Project description:In humans, there are four Ago proteins (Ago1M-bM-^@M-^S4) and AGO1- and 2 were previously implicated in TGS induced by exogenous siRNAs and microRNAs (miRs) directed against gene promoter transcripts via promotion of changes in histone covalent modifications and DNA methylation. Not-with-standing, many mechanistic details of this process remain poorly defined in human cells, and very little is known about the identity of possible endogenous signals, which may drive this process in human cells. Given the evolutionary conserved role of siRNAs and AGO proteins in TGS and heterochromatin formation, we set out to analyse their possible involvement in senesence-associated repression of E2F target genes. To obtain a detailed picture of AGO-immunoprecipitating miRs (RIP) in senescent cells, we used next-generation sequencing (NGS)(RIP-Seq). We also included histone H3 dimethylated on lysine 9 (H3K9me2) in this analysis to assign potential AGO2-interacting miRs to a repressive chromatin state and unfractionated, cellular RNA from senescent cells for normalisation. Determination of AGO AGO-immunoprecipitating miRs in WI-38 senescent human fibroblast

2011-12-17 | E-GEOD-34494 | biostudies-arrayexpress

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