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Dynamic enhancer interactome promotes senescence and aging

ABSTRACT: Dynamic enhancer interactome promotes senescence and aging

PROVIDER: PRJNA1066353 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR24661423_1.fastq.gz	Fastqsanger.gz
	SRR24661423_2.fastq.gz	Fastqsanger.gz
	SRR24661424_1.fastq.gz	Fastqsanger.gz
	SRR24661424_2.fastq.gz	Fastqsanger.gz
	SRR24661425_1.fastq.gz	Fastqsanger.gz

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Dynamic enhancer interactome promotes senescence and aging [Hi-ChIP II]

Project description:Dynamic enhancer interactome promotes senescence and aging [Hi-ChIP II]

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Dynamic enhancer interactome promotes senescence and aging [Hi-ChIP I]

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Dynamic enhancer interactome promotes senescence and aging [Hi-ChIP II]

Project description:Gene expression programs are regulated by enhancers which act in a context-specific manner, and can reside at great distances from their target genes. Extensive three-dimensional (3D) genome reorganization occurs in senescence, but how enhancer interactomes are reconfigured during this process is just beginning to be understood. Here we generated high-resolution contact maps of active enhancers and their target genes, assessed chromatin accessibility, and established one-dimensional maps of various histone modifications and transcription factors to comprehensively understand the regulation of enhancer configuration during senescence. Hyper-connected enhancer communities/cliques formed around genes that are highly expressed and within essential gene pathways in each cell state. In addition, motif analysis indicates the involvement of specific transcription factors in hyper-connected regulatory elements in each condition; importantly, MafK, a bZIP family transcription factor, was upregulated in senescence, and reduced expression of MafK ameliorated the senescence phenotypes. Because the accumulation of senescent cells is a key feature of aging, we further investigated enhancer connectomes in the liver of young and aged mice. Hyper-connected enhancer communities were identified during aging, which regulate essential genes that maintain cell differentiation and homeostasis. These findings reveal that hyper-connected enhancer communities correlate with high gene expression in senescence and aging and provide potential hotspots for therapeutic intervention in aging and age-associated diseases.

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Dynamic enhancer interactome promotes senescence and aging [Hi-ChIP I]

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The interactome of Pou5f1 enhancer in mouse embryonic stem cells

Project description:We report the application of enyzme-based 4C-Seq technique for exploring Pou5f1 enhancer interactome in mouse ES cells. We explored the interactome of Pou5f1 upstream enhancer in mouse ES cells by using an enzyme digestion based 4C-Seq protocol. The interactome is involved in gene active regulation.

2013-04-28 | E-GEOD-45418 | biostudies-arrayexpress

Dynamic enhancer interactome promotes senescence and aging

Project description:This SuperSeries is composed of the SubSeries listed below.

2024-01-18 | GSE253618 | GEO

The interactome of Pou5f1 enhancer in mouse embryonic stem cells

Project description:We report the application of enyzme-based 4C-Seq technique for exploring Pou5f1 enhancer interactome in mouse ES cells.

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The interactome of POU5F1 upstream enhancer in mouse embryonic stem cells revealed by 4C-Seq

Project description:We report the application of 4C-Seq technique for exploring POU5F1 enhancer interactome in mouse embryonic stem cells. A statistical model was built to identify enriched interacting regions from raw 4C data. The biological replicate data were compared to identify reproducible interacting regions. The interacting sites in the reproducible regions are enriched with active histone marks as well as transcription factors Oct4, Klf4, Esrrb, Tcfcp2i1 and Zfx that are critical for reprogramming and pluripotency. Generation of Illumina HiSeq2000 sequencing data using 4C-Seq protocol

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A role for Pak2 kinase in cellular senescence and organismal aging

Project description:Cellular senescence is an irreversible cell growth arrest state linked to loss of tissue function and aging in mammals. The cellular transition from proliferation to senescence is marked by increased expression of the cell-cycle inhibitor p16INK4A and formation of senescence-associated heterochromatin foci (SAHF). It is known that SAHF formation depends primarily on HIRA-mediated nucleosome assembly of H3.3, and that the serine/threonine protein kinase Pak2 regulates HIRA-mediated nucleosome assembly of histone H3.3. Here, we tested the role of Pak2 in the regulation of cellular senescence. Depletion of Pak2 delays premature cellular senescence in both oncogene-induced senescence in human fibroblasts IMR90 cells and in oxidative stress induced senescence of mouse embryonic fibroblasts. Furthermore, overexpression of Pak2 promotes senescence of IMR90 cells. Importantly, depletion of Pak2 in mice delays the onset of some of the aging-associated phenotypes and extend life span of a progeroid mouse model. Lastly, we showed that Pak2 is required for expression of a group of genes involved in cellular senescence and regulates the deposition of newly synthesized H3.3 onto chromatin in senescent cells. Together, our results demonstrate that Pak2 is an important regulator of cellular senescence and organismal aging, in part through the regulation of gene expression and H3.3 nucleosome assembly.

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