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CTCF and Cohesin (Rad21) ChIP-seq in female mouse liver

ABSTRACT: Sequencing files provided here include mouse liver ChIP-seq for CTCF and the cohesin subunit Rad21. These files are part of a larger study ("CTCF and Cohesin link sex-biased distal regulatory elements to sex-biased gene expression in mouse liver") where we compare CTCF and cohesin binding in male and female mouse liver as well as differences in chromatin conformation (DNA looping).

ORGANISM(S): Mus musculus

PROVIDER: GSE130908 | GEO | 2020/07/07

REPOSITORIES: GEO

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CTCF and Cohesin (Rad21) ChIP-seq in female mouse liver

Project description:CTCF and Cohesin (Rad21) ChIP-seq in female mouse liver

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Project description:We explored the relationship between the evolutionary dynamics of CTCF binding and the functional stability of higher order genome structures, by performing ChIP-seq experiments in closely related Mus species or strains and intersecting with Hi-C-derived topologically associating domains (TADs) and expression data. All experiments were performed in adult male liver samples in 3 biological replicates and with an input control set. We also generated RAD21 (cohesin subunit) ChIP-seq from a replicate of adult male mouse (C57BL/6J) liver to determine localization of cohesin with respect to CTCF.

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Rad21-mediated NF-κB signaling limits hematopoietic stem cell self-renewal in aging and inflammation

Project description:MTD project_description Inflammation and decreased stem cell function characterize organism aging, yet the relationship between these factors remains incompletely understood. This study shows that aged hematopoietic stem and progenitor cells exhibit increased ground-stage NF-κB activity, which enhances their responsiveness to undergo differentiation and loss of self-renewal in response to inflammation. The study identifies Rad21/cohesin as a critical mediator of NF-κB signals, by increasing chromatin accessibility of inter-/intra-genic and enhancer regions. Rad21/NF-κB are required for normal differentiation, but limit self-renewal of hematopoietic stem cells (HSCs) during aging and inflammation in an NF-κB dependent manner. HSCs from aged mice fail to downregulate Rad21/cohesin and inflammation/differentiation inducing signals in the resolution phase after acute inflammation. and The inhibition of cohesin/NF-κB is sufficient to revert the hypersensitivity of aged HSPCs to inflammation-induced differentiation. During aging, myeloid-biased HSCs with disrupted and naturally occurring reduced expression of Rad21/cohesin are increasingly selected over lymphoid-biased HSCs. Together, Rad21/cohesin mediated NF-κB signaling limits HSPC function during aging and selects for cohesin deficient HSCs with myeloid skewed differentiation.

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CTCF and Cohesin link sex-biased distal regulatory elements to sex-biased gene expression in mouse liver

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