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ABSTRACT: Transcriptome of overexpression HDAC5 in cell line KGN

PROVIDER: PRJNA1173315 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR31008043_1.fastq.gz	Fastqsanger.gz
	SRR31008043_2.fastq.gz	Fastqsanger.gz
	SRR31008044_1.fastq.gz	Fastqsanger.gz
	SRR31008044_2.fastq.gz	Fastqsanger.gz
	SRR31008045_1.fastq.gz	Fastqsanger.gz

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Gene knockdown and overexpression of 402C>G FOXL2 in COV434 and KGN cells

Project description:Despite their distinct biology, granulosa cell tumours (GCTs) are treated the same as other ovarian tumours. Intriguingly, a recurring somatic mutation in the transcription factor Forkhead Box L2 (FOXL2) 402C>G has been found in nearly all GCTs examined. This investigation aims to identify the pathogenicity of mutant FOXL2 by studying its altered transcriptional targets. The expression of mutant FOXL2 was reduced in the GCT cell line KGN, and wildtype and mutant FOXL2 were overexpressed in the GCT cell line COV434. Comparisons were made between the transcriptomes of control cells and cells altered by FOXL2 knockdown and overexpression, to detect potential transcriptional targets of mutant FOXL2. Comparisons were made between the transcriptomes of control cells and cells altered by FOXL2 knockdown and overexpression, to detect potential transcriptional targets of mutant FOXL2. Mutant FOXL2 was silenced in KGN cells with the use of siRNA and a non-targetting siRNA control. Wildtype and mutant FOXL2 were overexpressed in COV434 cells with the use of overexpression plasmids and an empty plasmid control. Each experiment was performed in triplicate. Total RNA was harvested at 24h post transfection and hybridised to Affymetrix U133 plus 2.0 arrays.

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Project description:Transcriptome profiling of MED1 wild-type and knockout human pre-B ALL cell line 697 (RNA-seq)

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RNAi of human HUVEC cells knocked down for HDAC isoenzymes reveals sHDAC5 is a repressor of angiogenesis and determines the angiogenic gene expression pattern of endothelial cells

Project description:Class IIa histone deacetylases (HDACs) are signal-responsive regulators of gene expression involved in vascular homeostasis. To investigate the differential role of class IIa HDACs for the regulation of angiogenesis, we used siRNA to specifically suppress the individual HDAC isoenzymes. Among the HDAC isoforms tested, silencing of HDAC5 exhibited a unique pro-angiogenic effect evidenced by increased endothelial cell migration, sprouting and tube formation. Consistently, overexpression of HDAC5 decreased sprout formation, indicating that HDAC5 is a negative regulator of angiogenesis. The anti-angiogenic activity of HDAC5 was independent of MEF2 binding and its deacetylase activity, but required a nuclear localization indicating that HDAC5 might affect the transcriptional regulation of gene expression. To identify putative HDAC5 targets, we performed microarray expression analysis. Silencing of HDAC5 increased the expression of fibroblast growth factor 2 (FGF2) and angiogenic guidance factors including Slit2. Antagonization of FGF2 or Slit2 reduced sprout induction in response to HDAC5 siRNA. ChIP assays demonstrate that HDAC5 binds to the promoter of FGF2 and Slit2. In summary, HDAC5 represses angiogenic genes, like FGF2 and Slit2, which causally contribute to capillary-like sprouting of endothelial cells. The de-repression of angiogenic genes by HDAC5 inactivation may provide a useful therapeutic target for induction of angiogenesis. Experiment Overall Design: 6 samples: 3x siSCRAMBLED transfected HUVEC (control) + 3x siHDAC5 transfected HUVEC 24h after transfection

2009-04-11 | E-GEOD-15499 | biostudies-arrayexpress

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