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YY1 stabilizes super enhancer-promoter loops and gene expression during mesenchymal stem cell aging

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

ORGANISM(S): Homo sapiens

PROVIDER: GSE261011 | GEO | 2025/06/24

REPOSITORIES: GEO

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YY1 stabilizes super enhancer-promoter loops and gene expression during mesenchymal stem cell aging (RNA-Seq)

Project description:Stem cell aging leads to a progressive functional decline in self-renewal and differentiation capacity. How chromatin architecture impacts the gene expression changes that underlie altered stem cell function remains to be fully understood. Here, by integrative analyses of transcriptomic, epigenomic and Hi-C data in young and old in vitro aged human mesenchymal stem cells (MSCs), we identified super enhancer (SE)-promoter pairs and delineated changes in these loops during aging. SE target genes are associated with GO categories involved in key MSC functions and are enriched among genes with altered expression during aging, suggesting that changes in SE activity contribute to the functional decline of aged MSCs. YY1 is highly enriched at promoters and SEs and is lost from these regions in old cells. Loss of YY1 from SE-promoter loops correlates with reduced Hi-C contacts, and YY1 knockdown in young cells recapitulates age-associated transcriptomic changes, particularly among SE target genes. Our analyses provide novel insights into the role of altered chromatin loops in stem cell aging and highlight the function of YY1 in maintaining super enhancer-promoter loops and promoting gene expression stability during this process.

2025-06-24 | GSE261010 | GEO

YY1 stabilizes super enhancer-promoter loops and gene expression during mesenchymal stem cell aging (Hi-C)

2025-06-24 | GSE261009 | GEO

YY1 stabilizes super enhancer-promoter loops and gene expression during mesenchymal stem cell aging (ChIP-Seq)

2025-06-24 | GSE261008 | GEO

YY1 stabilizes super enhancer-promoter loops and gene expression during mesenchymal stem cell aging

Project description:YY1 stabilizes super enhancer-promoter loops and gene expression during mesenchymal stem cell aging

| PRJNA1084813 | ENA

YY1 stabilizes super enhancer-promoter loops and gene expression during mesenchymal stem cell aging (RNA-Seq)

Project description:YY1 stabilizes super enhancer-promoter loops and gene expression during mesenchymal stem cell aging (RNA-Seq)

| PRJNA1084821 | ENA

YY1 stabilizes super enhancer-promoter loops and gene expression during mesenchymal stem cell aging (ChIP-Seq)

Project description:YY1 stabilizes super enhancer-promoter loops and gene expression during mesenchymal stem cell aging (ChIP-Seq)

| PRJNA1084823 | ENA

YY1 stabilizes super enhancer-promoter loops and gene expression during mesenchymal stem cell aging (Hi-C)

Project description:YY1 stabilizes super enhancer-promoter loops and gene expression during mesenchymal stem cell aging (Hi-C)

| PRJNA1084822 | ENA

YY1 Is a Structural Regulator of Enhancer-Promoter Loops.

Project description:There is considerable evidence that chromosome structure plays important roles in gene control, but we have limited understanding of the proteins that contribute to structural interactions between gene promoters and their enhancer elements. Large DNA loops that encompass genes and their regulatory elements depend on CTCF-CTCF interactions, but most enhancer-promoter interactions do not employ this structural protein. Here, we show that the ubiquitously expressed transcription factor Yin Yang 1 (YY1) contributes to enhancer-promoter structural interactions in a manner analogous to DNA interactions mediated by CTCF. YY1 binds to active enhancers and promoter-proximal elements and forms dimers that facilitate the interaction of these DNA elements. Deletion of YY1 binding sites or depletion of YY1 protein disrupts enhancer-promoter looping and gene expression. We propose that YY1-mediated enhancer-promoter interactions are a general feature of mammalian gene control.

| S-EPMC5785279 | biostudies-literature

YY1 is a structural regulator of enhancer-promoter loops

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

2017-11-16 | GSE99521 | GEO

YY1 is a structural regulator of enhancer-promoter loops [HiChIP]

Project description:There is considerable evidence that chromosome structure plays important roles in gene control, but we have limited understanding of the proteins that contribute to structural interactions between gene promoters and their enhancer elements. Large DNA loops that encompass genes and their regulatory elements depend on CTCF-CTCF interactions, but most enhancer-promoter interactions do not depend on this structural protein. Here we show that the transcription factor Yin Yang 1 (YY1) contributes to enhancer-promoter structural interactions in a manner analogous to DNA interactions mediated by CTCF. YY1 binds to active enhancers and promoter-proximal elements in all cells examined. YY1 forms dimers that can facilitate DNA interactions. Deletion of YY1 binding sites or depletion of YY1 can disrupt enhancer-promoter looping and normal gene expression. We propose that YY1-mediated enhancer-promoter interactions are a general feature of mammalian gene control.

2017-11-16 | GSE99519 | GEO

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