Exploring the downstream genes of HDAC4
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ABSTRACT:
PROVIDER: PRJNA517431 | ENA |
REPOSITORIES: ENA
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Project description:To explore the downstream genes of HDAC4, we performed RNA-seq to screen after knocking down HDAC4 in 5-8F cells, a nasopharyngeal carcinoma cell line.
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Project description:Transcriptional alterations are characteristic of persistent pain states but the key regulators remain elusive. Using a conditional knockout (cKO) strategy in mice we sought to determine whether loss of the transcriptional co-repressor histone deacetylase four (HDAC4) would have implications for sensory neuron transcription and nociception. HDAC4 was found to be largely dispensable for transcriptional regulation of naïve sensory neurons but was required for transcriptional responses after injury, with Calca and Trpv1 expression consistently downregulated in HDAC4 cKO compared to littermate controls (0.2-0.44 fold). This downregulation corresponded to reduced sensitivity to capsaicin in vitro (76% +/- 4.4% wildtype capsaicin responders vs 56.9% +/- 4.7% cKO responders) and to reduced thermal hypersensitivity in the complete Freund’s adjuvant model of inflammatory pain (1.3-1.4 fold improvement). These data indicate that HDAC4 is a novel inflammatory pain mediator and may be a good therapeutic target, capable of orchestrating the regulation of multiple downstream effectors. Total RNA was extracted from HDAC4 cKO and HDAC4 fl/fl naïve adult lumbar dorsal root ganglia (n=3/group). mRNA expression was compared using Affymetrix Mouse Gene Arrays (Mouse Gene 2.0ST) run on a GeneChip Fluidics Station 450. Chips were scanned on an Affymetrix GeneChip Scanner.
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Project description:Transcriptional alterations are characteristic of persistent pain states but the key regulators remain elusive. Using a conditional knockout (cKO) strategy in mice we sought to determine whether loss of the transcriptional co-repressor histone deacetylase four (HDAC4) would have implications for sensory neuron transcription and nociception. HDAC4 was found to be largely dispensable for transcriptional regulation of naïve sensory neurons but was required for transcriptional responses after injury, with Calca and Trpv1 expression consistently downregulated in HDAC4 cKO compared to littermate controls (0.2-0.44 fold). This downregulation corresponded to reduced sensitivity to capsaicin in vitro (76% +/- 4.4% wildtype capsaicin responders vs 56.9% +/- 4.7% cKO responders) and to reduced thermal hypersensitivity in the complete Freund’s adjuvant model of inflammatory pain (1.3-1.4 fold improvement). These data indicate that HDAC4 is a novel inflammatory pain mediator and may be a good therapeutic target, capable of orchestrating the regulation of multiple downstream effectors.
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Project description:Histone Deacetylase 4 (HDAC4) is known to contribute to cardiac remodeling processes. We wanted to identify and compare different genome wide targets of HDAC4 to well described interaction partners and its functional consequences. Therefore, we used a model of adult cardiomyocytes isolated from HDAC4 knockout mice and Wildtyp (WT) controls. We looked for HDAC4s contribution to changes of activating histone modifications (H3K4me3, H3K9ac, H3K27ac) and repressive pendants (H3K9me2 and H3K27me3).
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Project description:HDACs play crucial role in epigenetic modulation through deacetylation of histone and non-histone substrates in critical process of normal development and cancer. Moreover, HDAC inhibitors have been considered as new agent by effects such as cell cycle arrest, apoptosis, anti-angiogenic effects and autophagy and utilized in clinical applications for chemotherapy. we previously reported that HDAC 1, 4, 6 and 8 were higly expressed in MDA-MB-231 than MCF-7 cells and HDAC1, 6 and 8 excepting HDAC4 were associated with invasion that is very important factor in cancer progression. However, HDAC4 did not affect in invasion. To investigate interaction between chemoresistance and HDAC4 expression, we establish stable cells overexpressing HDAC4 in MCF-7 cells. Cells overexpressed HDAC4 were increased cytotoxicity about 5-FU and identified 356 differentially expressed genes using Ilumina array. Based on array result, we selected SMAD4 as a candidate gene related with chemoresistance because SMAD4 was previously reported evaluation of chemoresistance to 5-FU. We purpose that HDAC4 regulated with SMAD4 expression through acetylation in SMAD4 promoter region. HDAC4 directly bound a part of SMAD4 promoter. Total RNA obtained from cells overexpressed HDAC4 cDNA in MCF-7 compared to control cells.
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Project description:We analyzed the genome wide distributions of HDAC1, HDAC4, HDAC7 in Th17 cells. We find that majority of HDAC4 and HDAC7 binding sites are HDAC1 bound. TMP269 inhibits HDAC4 and HDAC7 at promoter sites of Th17 negative regulator genes, leading to their upregulation through increased H3, H4 acetylation.
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Project description:NGS technology was used for high-throughput profiling of DNA loci bound by HDAC4 in muscle cells in growth condition. Chromatin was immunoprecipitated from C2C12 cells and IP with anti-HDAC4 antibody. Libraries were then generated, processed with Illumina cBot for cluster generation on the flowcell, and sequenced on single-end 50 bp mode at the multiplexing level requested on HiSeq2500. ChIP-Seq standard bioinformatics analysis and functional annotation revealed that HDAC4 predominantly binds to the gene body (UTR5, introns and exons) of coding genes, rather than to upstream regulatory regions or non-coding RNAs in proliferating muscle cells.
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