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Gene Expression in Wild Type and TTP Delta ARE Knock-in Mice using RNA-seq

ABSTRACT: Gene Expression in Wild Type and TTP Delta ARE Knock-in Mice using RNA-seq

PROVIDER: PRJNA623450 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR11492518_1.fastq.gz	Fastqsanger.gz
	SRR11492518_2.fastq.gz	Fastqsanger.gz
	SRR11492519_1.fastq.gz	Fastqsanger.gz
	SRR11492519_2.fastq.gz	Fastqsanger.gz
	SRR11492520_1.fastq.gz	Fastqsanger.gz

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Project description:Tristetraprolin (TTP) is a tandem CCCH zinc finger protein that was identified through its rapid induction by mitogens in fibroblasts. Studies of TTP-deficient mice, and cells derived from them, showed that TTP could bind to certain AU-rich elements in mRNAs, leading to increases in the rates of mRNA deadenylation and destruction. Known physiological target; mRNAs for TTP include tumor necrosis factor alpha (TNF), granulocyte macrophage colony stimulating factor (GM-CSF) and interleukin 2 beta (IL2 beta). Here we used microarray analysis of RNA from wild-type and TTP-deficient fibroblast cell lines to identify transcripts with different decay rates, after serum stimulation and actinomycin D treatment. Of 250 mRNAs apparently stabilized in the absence of TTP, 23 contained conserved TTP binding sites; 10 of these were shown by secondary analyses to be stabilized. The most dramatically affected transcript encoded the protein Ier3, recently implicated in the physiological control of blood pressure. The Ier3 transcript contained several conserved TTP binding sites that could bind TTP directly, and conferred TTP sensitivity to the mRNA in cell transfection studies. These studies have identified several new, physiologically relevant TTP target transcripts in fibroblasts; these target mRNAs encode proteins from a variety of functional classes. Experiment Overall Design: Cell lines were derived from mouse embryonic fibroblast (MEF) cultures from littermate E14.5 embryos (for Zfp36 +/+ and -/- cells). MEFs were maintained at 37o C (5% CO2) in DMEM containing 10% FBS, 100 Experiment Overall Design: U/ml penicillin, 100 Î¼g/ml streptomycin and 2 mM L-glutamine. When the cells had reached approximately 70-90 % confluence, they were trypsinized and diluted 2-50 fold in the same medium, based on morphology and growth rate, such that they would reach near confluence in 3-4 days when subcultured. Experiment Overall Design: Five identical experiments involving sequential serum deprivation, serum stimulation and actinomycin D treatment were performed on five different days; each experiment involved simultaneous identical experiments with the WT and KO cell lines. In each experiment, the cells were serum deprived for 16h, and a sample was taken at that point as a serum-deprived control. The cells were then stimulated by 10% FBS for Experiment Overall Design: 90 min and another sample taken, after which 5Î¼g/ml actinomycin D was added; samples for RNA analysis were then removed at 30, 60, 90 and 120 min after actinomycin D treatment. In all experiments, each sample represented three combined 100 mm dishes of cells.

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Gene Expression in Wild Type and TTP Delta ARE Knock-in Mice using RNA-seq

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