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E-GEOD-25937

ABSTRACT: Gene expression in mouse liver depleted of HDAC3

OTHER RELATED OMICS DATASETS IN: PRJNA153253PRJNA136929PRJNA135689

PROVIDER: E-GEOD-25937 | ExpressionAtlas | 2014-07-03

REPOSITORIES: ExpressionAtlas

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			Action	DRS
	E-GEOD-25937-analysis-methods.tsv	Tabular
	E-GEOD-25937-atlasExperimentSummary.Rdata	Rdata
	E-GEOD-25937-configuration.xml	Xml
	E-GEOD-25937-percentile-ranks.tsv	Tabular
	E-GEOD-25937.condensed-sdrf.tsv	Tabular

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MCRS1 is a histone acetylation regulator whose loss in hepatocytes promotes cirrhosis

Project description:Cirrhosis is a late stage of fibrosis that fatally impairs liver function. Unfortunately, genetic animal models mimicking human cirrhosis are lacking and the molecular mechanisms remain unknown. Here we report the first murine genetic model recapitulating clinical features of cirrhosis, which are induced by hepatocyte-specific elimination of microspherule protein 1 (MCRS1), a member of the non-specific lethal (NSL) and INO80 chromatin modifier complexes. Deregulation of bile acid (BA) transporter expression, revealed by proteomic analysis of MCRS1-depleted mouse livers, with pronounced downregulation of the Na+-taurocholate cotransporting polypeptide (NTCP), causes BA accumulation in liver sinusoids. Genetic ablation of the BA receptor FXR in hepatic stellate cells (HSCs) suppresses bile duct ligation (BDL)-induced fibrosis in mice. Moreover, in vitro experiments demonstrate that fibrotic marker expression is reduced in FXR-depleted HSCs cultured in conditioned medium containing high BAs from MCRS1-depleted hepatocytes. Additionally, hepatocytic MCRS1 overexpression increases their NTCP levels, and consequently protects mice against BDL-induced liver fibrosis. Deletion of a putative SANT domain in MCRS1, also revealed by protein sequence analysis and essential for histone H3 (H3) binding, disrupts H3/HDAC1 complex formation. This evicts MCRS1 and HDAC1 from their H3 anchoring sites and increases histone lysine acetylation of BA transporter genes, independently of the NSL or INO80 complexes. Taken together, our data reveal a previously unrecognized function of MCRS1 as a novel histone acetylation regulator that binds to H3, and recruits a novel chromatin-modifying complex that maintains gene expression homeostasis and liver health. Accordingly, loss of nuclear MCRS1 correlates with increased histone acetylation in human cirrhosis samples. Regulation of histone acetylation might thus be central to cirrhotic development.

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Mus musculus

Project description:BXD Mouse Liver Gene Expression

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HNF6 and Rev-erba Integrate Hepatic Lipid Metabolism By Overlapping and Distinct Transcriptional Mechanisms [ChIP-Seq]

Project description:We address the function of HNF6 in the mouse liver metabolism and Rev-erba cistrome We performed Rev-erba ChIP-seq in mouse livers at 5pm of the day and compared between WT and HNF6-depleted livers.

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Integrative multi-omics analysis of intestinal organoid differentiation

Project description:Intestinal organoids accurately recapitulate epithelial homeostasis in vivo, thereby representing a powerful in vitro system to investigate lineage specification and cellular differentiation. Here, we applied a multi-omics framework on stem cell enriched and -depleted mouse intestinal organoids to obtain a holistic view of the molecular mechanisms that drive differential gene expression during adult intestinal stem cell differentiation. Our data revealed a global rewiring of the transcriptome and proteome between intestinal stem cells and enterocytes, with the majority of dynamic protein expression being transcription-driven. Integrating absolute mRNA and protein copy numbers revealed post-transcriptional regulation of gene expression. Probing the epigenetic landscape identified a large number of cell-type specific regulatory elements, which revealed Hnf4g as a major driver of enterocyte differentiation. In summary, by applying an integrative systems biology approach we uncovered multiple layers of gene expression regulation, which contribute to lineage specification and plasticity of the mouse small intestinal epithelium.

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Gene expression in mouse liver depleted of HDAC3

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2011-03-11 | E-GEOD-25937 | biostudies-arrayexpress

Genome-wide acetylated histone 3 lysine 9 (H3K9ac) in HDAC3-depleted liver rescued with deacectylase-dead HDAC3 mutants

Project description:We found that several deacetylase-dead HDAC3 mutants were able to rescue the metabolic phenotype of HDAC3-depleted livers. Here we profile the histone acetylation in the presence of different HDAC3 mutants in mouse liver. Deacetylase-dead HDAC3 mutants, including HAHA, KA, YF and HEBI, were introduced into HDAC3-depleted (Cre) mouse livers by virus along with wild-type (WT) HDAC3 as a control. Livers were harvested at 5 pm (ZT 10) and subjected to ChIP with anti-H3K9ac antibodies followed by deep sequencing.

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