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ChIP-seq experiment analyzing binding of HDAC2 and HDAC3 to genomic loci in rat Neural Stem Cells

ABSTRACT: Binding of HDAC2 and HDAC3 was assayed using antibodies SC-7899x and SC-11417x

ORGANISM(S): Rattus norvegicus

PROVIDER: GSE57232 | GEO | 2014/06/17

SECONDARY ACCESSION(S): PRJNA246017

REPOSITORIES: GEO

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ChIP-seq experiment analyzing binding of HDAC2 and HDAC3 to genomic loci in rat Neural Stem Cells

Project description:Binding of HDAC2 and HDAC3 was assayed using antibodies SC-7899x and SC-11417x examination of HDAC2 and HDAC3 binding in rat neural stem cells

2014-06-17 | E-GEOD-57232 | biostudies-arrayexpress

Molecular and cellular consequences of genetic knockout of Hdac2 and Hdac3 in striatal medium spiny neurons of Huntington's disease knock-in mice

Project description:Somatic expansion of the Huntington’s disease (HD) CAG repeat drives the rate of a pathogenic process resulting in neuronal cell death. Although mechanisms of neuronal toxicity are not well delineated, transcriptional dysregulation is a likely contributor. Chromatin modifiers are implicated in both mechanisms of CAG instability and transcriptional dysregulation. Here, we tested whether histone deacetylase genes Hdac2 and Hdac3 modify molecular and cellular phenotypes in HttQ111 knock-in mice using conditional knockouts in striatal medium-spiny striatal neurons (MSNs) exhibiting extensive CAG expansion and exquisite disease vulnerability. MSN-specific Hdac2 or Hdac3 knockout attenuated CAG expansion, with the Hdac2 knockout impacting nuclear huntingtin pathology. Hdac2 knockout resulted in a substantial transcriptional response that included reversal of transcriptional dysregulation elicited by the HttQ111 allele. Our results identify novel modifiers of CAG expansion in MSNs, providing testable mechanistic hypotheses, and a potentially complex relationship between Htt and Hdac2 with implications for targeting transcriptional dysregulation in HD.

2020-06-01 | GSE148440 | GEO

Mitotic H3K9 acetylation patterns are controlled by phase-specific activity of the histone deacetylases HDAC2, 3 and SIRT1

Project description:Histone acetylation play a fundamental role in many biological processes. H3K9ac is tightly linked to active transcription, and enriched in promoters, enhancers and insulators. During mitosis H3k9ac levels are reduced, and the mechanism of this reduction is not clear. Here, we used small molecules inhibitors of histone deacetylases and evaluated by immunofluorescence and western blots the involvement of each of the targeted enzymes in regulating H3K9ac during prophase, metaphase, anaphase, telophase and cytokinesis. We identified three histone deacetylases, HDAC2, HDAC3 and SIRT1, as modulators of H3K9ac mitotic levels. HDAC2 inhibition, increased global H3K9ac in prophase, whereas HDAC3 or SIRT1 inhibition, increased H3K9ac levels in metaphase. Next, we performed ChIP-seq in mitotic cells following specific inhibition of each of these histone deacetylases. While we observed a high concordance between the genomic areas impacted by HDAC2 and HDAC3, we detected a small set of loci that were unique to each condition, with HDAC3-specific targets being enriched for genes involved in mitosis regulation.

2022-08-14 | GSE168180 | GEO

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.

2013-11-25 | E-GEOD-49365 | biostudies-arrayexpress

A HDAC4-HDAC2 complex composes an epigenetic sensor that links the DNA damage response to the senescent program by erasing H2BK120 acetylation [II]

Project description:Purpose: Identification of SEs in time course after HDAC4 depletion and correlation to the accumulation of DNA damage. Outcome: We discovered a novel epigenetic complex formed by HDAC4 and HDAC2 that is involved in the erasure of H2BK120 acetylation. The HDAC4/HDAC2 complex, through the dynamic deacetylation of H2BK120, modulates the efficiency of DNA repair by homologous recombination (HR) by controlling the recruitment of BRCA1 and CtIP to the site of lesions. Degradation of HDAC4 during senescence has a dual effect. First, it contributes to super-enhancers activation by limiting HDAC3 activity, and second, it causes the accumulation of damaged DNA.

2024-06-18 | GSE216861 | GEO

Effect of HDAC2 siRNA on HCC

Project description:Determine the effect and specificity of HDAC2 siRNA compared to SAHA inhibition of HDAC2 in hepatocellular carcinoma (HCC) Profile of treated cells compared to control Transcriptomic profiling

2014-10-02 | E-GEOD-52232 | biostudies-arrayexpress

Quantitative proteomic SILAC analysis of enteroids deleted for Hdac1 or Hdac2

Project description:We have exploited organoid SILAC approaches that we have previously developed (A SILAC-Based Method for Quantitative Proteomic Analysis of Intestinal Organoids.- Gonneaud A, Jones C, Turgeon N, Lévesque D, Asselin C, Boudreau F, Boisvert FM. -Sci Rep. 2016 Nov 30;6:38195. doi: 10.1038/srep38195) to investigate proteomic changes after deletion of epigenetic eraser genes Hdac1 and Hdac2 in enteroids. Both HDAC1 and HDAC2 are epigenetic erasers that drive specific and redundant gene expression patterns, in part by removing acetyl groups on histones. Deletion of these Hdac in intestinal epithelial cell (IEC) in vivo alters intestinal homeostasis, dependent on the Hdac deleted and the level of expression of both. To determine the intrinsic specific IEC function of HDAC1 and HDAC2, we have performed transcriptomic and quantitative proteomic approaches on enteroids deficient in Hdac1 or Hdac2. We have defined changes in both mRNA and protein expression patterns affecting IEC differentiation. We have identified IEC Hdac1- and Hdac2-dependent common as well as specific pathways and biological processes. These findings uncover unrecognized similarities and differences between Hdac1 and Hdac2 in IEC.

2019-11-14 | PXD011869 | Pride

Gene expression profiling of HDAC3-depleted mouse liver rescued with wild-type exogenous HDAC3

Project description:We have shown that intravenous injection of HDAC3 floxed mice with adeno-associated virus (AAV) expressing Cre depletes hepatic HDAC3, upregulates lipogenic gene expression, and causes fatty liver. When AAV-Flag-HDAC3 wild-type (WT) is co-injected along with AAV-Cre, the exogenous HDAC3 is expressed at endogenous levels and can completely rescue fatty liver phenotype. Here we profile transcriptome of the rescued WT livers in comparison with HDAC3-depleted (KO) livers. 4-months old C57BL/6 male mice were co-injected with AAV-Cre or AAV-Cre plus AAV-Flag-HDAC3. Mice were fed ad libitum and harvested at 5 pm (ZT10) at 2-weeks post-injection. Liver total RNA was extracted and hybridized to Affymetrix Mouse Gene 1.0ST array.

2013-11-25 | E-GEOD-49386 | biostudies-arrayexpress

Effect of HDAC2 siRNA on HCC

Project description:Determine the effect and specificity of HDAC2 siRNA compared to SAHA inhibition of HDAC2 in hepatocellular carcinoma (HCC)

2014-10-02 | GSE52232 | GEO

Discovery of a Highly Potent and Selective HDAC3 and HDAC8 PROTAC Dual Degrader

Project description:HDAC3 and HDAC8 are members of class I deacetylases involved in several biological mechanisms and represent a highly sought-after therapeutic target for drug development. It is historically challenging to develop selective deacetylase inhibitors due to their conserved catalytic domains. HDAC3 also has deacetylase-independent activity, which cannot be blocked by conventional enzymatic inhibitors. Recent advances in proteolysis-targeting chimeras (PROTACs) provides an opportunity to eliminate the whole protein selectively, abolishing both enzymatic and scaffolding functions. Here, we report a novel HDAC3/8 dual degrader YX968 that induces highly potent, rapid and selective degradation of both HDAC3 and HDAC8 without trigging pan-HDAC inhibitory effects. Unbiased quantitative proteomics experiments further confirmed its high selectivity. This dual-specific degrader specifically ablates cellular pathways attributed to HDAC3 and HDAC8 and exhibits high potency in killing cancer cells. YX968 represents a new probe for dissecting the complex biological functions of HDAC3 and HDAC8.

2023-07-18 | PXD040941 | Pride

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