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Epigenome analysis of U937, U937 treated with 5mM azacytidine for 24 and 72 hours and its azacytidine-resistant derivative

ABSTRACT: Genome-wide DNA methylation profiling of U937 and its azacytidine-resistant derivative R-U937.

ORGANISM(S): Homo sapiens

PROVIDER: GSE45707 | GEO | 2013/07/01

SECONDARY ACCESSION(S): PRJNA195910

REPOSITORIES: GEO

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Epigenome analysis of U937, U937 treated with 5mM azacytidine for 24 and 72 hours and its azacytidine-resistant derivative

Project description:Genome-wide DNA methylation profiling of U937 and its azacytidine-resistant derivative R-U937. Bisulphite-converted DNA from the samples were hybridised to Illumina HumanMethylation450 BeadChips.

2013-07-01 | E-GEOD-45707 | biostudies-arrayexpress

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Gene regulation in Erbb2 transfected NIH3T3 cells after Azacytidine treatment

Project description:5-Azacytidine or 5-aza-2’-deoxycytidine is a chemical analogue of the cytosine nucleoside used in DNA and RNA. Cells in the presence of 5-azacytidine incorporate it into DNA during replication and RNA during transcription. The incorporation of 5-azacytidine into DNA or RNA inhibits methyltransferase thereby causing demethylation in that sequence, affecting the way that cell regulation proteins are able to bind to the DNA/RNA substrate. Inhibition of DNA occurs through the formation of stable complexes between the molecule and with DNA methyltransferases, thereby saturating the cells methylation machinery. 5-azacytidine is mainly used in the treatment of myelodysplastic syndrome. Changes in gene expression levels in Erbb2 transfected murine fibroblast cell line after treatment with Azacytidine in two different concentrations were analysed. Keywords: cDNA microarray, murine fibroblast, azacytidine treatment, carcinogenesis

2009-10-01 | GSE8374 | GEO

Gene regulation in Erbb2 transfected NIH3T3 cells after Azacytidine treatment

Project description:5-Azacytidine or 5-aza-2â??-deoxycytidine is a chemical analogue of the cytosine nucleoside used in DNA and RNA. Cells in the presence of 5-azacytidine incorporate it into DNA during replication and RNA during transcription. The incorporation of 5-azacytidine into DNA or RNA inhibits methyltransferase thereby causing demethylation in that sequence, affecting the way that cell regulation proteins are able to bind to the DNA/RNA substrate. Inhibition of DNA occurs through the formation of stable complexes between the molecule and with DNA methyltransferases, thereby saturating the cells methylation machinery. 5-azacytidine is mainly used in the treatment of myelodysplastic syndrome. Changes in gene expression levels in Erbb2 transfected murine fibroblast cell line after treatment with Azacytidine in two different concentrations were analysed. Keywords: cDNA microarray, murine fibroblast, azacytidine treatment, carcinogenesis Gene expression levels of Erbb2 transfected NIH3T3 cell lines treated with 5ÂµM and 10ÂµM Azacytidine were compared to Erbb2 transfected but non-treated NIH3T3 cell line. For each Azacytidine concentration 4-8 experiments were performed including 50% dye swaps. As a controll experiments gene expression levels of NIH3T3 cells with and without Azacytidine treatment were analysed

2009-10-01 | E-GEOD-8374 | biostudies-arrayexpress

RNAseq to investigate transcriptional changes in human MM cell lines due to panobinostat, 5-Azacytidine, panobinostat+5-Azacytidine or n-methyl-2-pyrroldine (NMP) treatments.

Project description:Purpose: We applied RNA sequencing technology for high-throughput analysis of transcriptional changes within human MM cell lines JJN3 and U266 due to individual and combination drug treatment. Methods: JJN3 and U266 cells were treated with pan-HDACi panbobinostat, DNMTi 5-Azacytidine, panobinostat+5-Azacytidine or NMP for 4h or 24h in triplicate and transcriptional changes assessed by RNAseq using Illumina HiSeq platform. Specifically, JJN3 cells were treated with 10nM panobinostat, 2.5µM 5-Azacytidine, panobinostat+5-Azacytidine (at given doses), or 10mM NMP. U266 cells were treated with 10nM panobinostat, 10µM 5-Azacytidine, panobinostat+5-Azacytidine (at given doses), or 10mM NMP. Results: We report unique and overlapping transcriptional signatures that lead to the induction of apoptosis in human MM cell lines in a cell-specific manner due to individual or combination treatments. Conclusions: A detailed analysis of differential transcriptional events in human MM cell lines due to HDACi, DNMTi, HDACi+DNMTi and NMP appear to define the molecular events leading to apoptosis and drug mechanism of action.

2014-04-09 | GSE56623 | GEO

Escherichia coli: untreated versus 5-azacytidine-treated expression profiles

Project description:DNA microarray experiments were used to compare gene expression profiles of untreated and 5-azacytidine treated Escherichia coli at both logarithmic phase and early stationary phase The goal was to determine the effect of cytosine DNA methylation loss on gene expression (5-azacytidine is a methylation inhibitor)

2016-09-24 | GSE73707 | GEO

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