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Mus musculus

ABSTRACT: Digital Gene Expression (DGE) of thyroid hormone (T3)-responsive genes in C17.2 cells stably transfected with thyroid hormone receptors alpha and beta

PROVIDER: PRJNA168101 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR504538.fastq.gz	Fastqsanger.gz
	SRR504539.fastq.gz	Fastqsanger.gz
	SRR504540.fastq.gz	Fastqsanger.gz
	SRR504541.fastq.gz	Fastqsanger.gz
	SRR504542.fastq.gz	Fastqsanger.gz

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Digital Gene Expression (DGE) of thyroid hormone (T3)-responsive genes in C17.2 cells stably transfected with thyroid hormone receptors alpha and beta

Project description:Tagged versions of thyroid hormone receptors alpha (TRa) and beta (TRb) were stably transfected in two C17.2 cell lines, C17.2a and C17.2b, respectively. Cells were treated with 10-7 M T3 for 6, 12 or 24h or left untreated. We performed DGE by sequencing all polyA RNA according to a SAGE-derived method. Differential gene expression after T3 treatment was computed and the T3 responses induced by the two receptors were compared. We could conclude that, in a similar environment, target genes are only partially shared and that a significant proportion show receptor preference and even selectivity. Examination of thyroid hormone target genes over time in two cell lines (C17.2a, C17.2b), each expressing one of the thyroid hormone receptors (alpha, beta).

2012-12-31 | E-GEOD-38539 | biostudies-arrayexpress

Digital Gene Expression (DGE) of thyroid hormone (T3)-responsive genes in C17.2 cells stably transfected with thyroid hormone receptors alpha and beta

2012-12-31 | GSE38539 | GEO

Genome-wide cistromes of thyroid hormone receptors alpha and beta in C17.2 cells

Project description:Tagged versions of thyroid hormone receptors alpha (TRa) and beta (TRb) were stably transfected in two C17.2 cell lines, C17.2a and C17.2b, respectively. We performed an affinity-based purification of chromatin (ChAP), and high-throughput sequencing was used to assess binding sites of both receptors (ChAP-Seq). Standard ChIP-Seq for RXR was also performed in C17.2a cells. These data allow us to compare binding sites for both receptors and to conclude that they were only partially redundant, with co-existence of receptor-specific sites. Examination of binding sites of the two thyroid hormone receptors (alpha, beta) in two cell lines (C17.2a, C17.2b), each expressing one of the receptors. Examination of RXR binding sites in C17.2a cells.

2012-12-31 | E-GEOD-38347 | biostudies-arrayexpress

Genome-wide cistromes of thyroid hormone receptors alpha and beta in C17.2 cells

Project description:Tagged versions of thyroid hormone receptors alpha (TRa) and beta (TRb) were stably transfected in two C17.2 cell lines, C17.2a and C17.2b, respectively. We performed an affinity-based purification of chromatin (ChAP), and high-throughput sequencing was used to assess binding sites of both receptors (ChAP-Seq). Standard ChIP-Seq for RXR was also performed in C17.2a cells. These data allow us to compare binding sites for both receptors and to conclude that they were only partially redundant, with co-existence of receptor-specific sites.

2012-12-31 | GSE38347 | GEO

Effect of v-erbA on T3-responsive genes in AML-12 hepatocytes

Project description:The v-erbA oncogene belongs to a superfamily of transcription factors called nuclear receptors, which includes the thyroid hormone receptors (TRs) responsible for mediating the effects of thyroid hormone (T3). Nuclear receptors bind to specific DNA sequences in the promoter region of target genes and v-erbA is known to exert a dominant negative effect on the activity of the TRs. The repressor activity of v-erbA has been linked to the development of hepatocellular carcinoma (HCC) in a mouse model. We have used microarray analysis to identify genes differentially expressed in hepatocytes in culture (AML12 cells) stably transfected with v-erbA and exposed to T3. We have found that v-erbA can negatively regulate expression of T3-responsive genes known to have a protective function against tumor development. We have also identified a number of v-erbA- (but not T3-) responsive genes that are known to be involved in carcinogenesis and which may play a role in the development of HCC.

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Mus musculus

Project description:Genome-wide cistromes of thyroid hormone receptors alpha and beta in C17.2 cells

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Thyroid hormone receptor alpha is required for thyroid hormone-dependent neural cell proliferation during tadpole metamorphosis

Project description:Using tadpoles mutant for thyroid hormone receptor alpha (thra), we show that TRa is required for thyroid hormone (T3) induction of cell proliferation in the brain. RNA-sequencing showed that the TRa is required for 95% of the gene regulation responses to T3.

2019-05-13 | GSE130816 | GEO

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Project description:We performed an original protocol called synthetic STARR-seq (PMID: 30427832) in which a library of putative response elements are tested for their capacity to bind thyroid hormone (T3) nuclear receptors and convey T3 transactivation More than 10 000 putative T3 response elements (T3RE) were cloned in the hSTARR-seq-ORI vector with a minimal promoter, in the 3' end of the transcribed sequence. These are variant of the consensus T3RE (5'NGGTCANNNNRGGNNA3') Therefore the most active T3RE are over-represented in the RNA of cells transfected with the plasmid library and treated with T3.

2022-07-06 | GSE196145 | GEO

Isoform-specific transcriptional activity of overlapping targets that respond to thyroid hormone receptors a1 and b1

Project description:Thyroid hormone receptors (TRs) are hormone-regulated transcription factors that control multiple aspects of physiology and development. TRs are expressed in vertebrates as a series of distinct isoforms that exert distinct biological roles. We wished to determine if the two most widely expressed isoforms, TRa1 and TRb1, exert their different biological effects by regulating different sets of target genes. Using stably transformed HepG2 cells and a microarray analysis, we were able to demonstrate that TRa1 and TRb1 regulate a largely overlapping repertoire of target genes in response to T3 hormone. However, these two isoforms display very different transcriptional properties on each individual target gene, ranging from a much greater T3-mediated regulation by TRa1 than by TRb1, to near equal regulation by both isoforms. We also identified TRa1 and TRb1 target genes that were regulated by these receptors in a hormone-independent fashion. We suggest that it is this gene-specific, isoform-specific amplitude of transcriptional regulation that is the likely basis for the appearance and maintenance of TRa1 and TRb1 over evolutionary time. In essence, TRa1 and TRb1 adjust the magnitude of the transcriptional response at different target genes to different levels; by altering the ratio of these isoforms in different tissues or at different developmental times, the intensity of T3 response can be individually tailored to different physiological and developmental requirements. TRa1, TRb1, or empty plasmid control stably transfected HepG2 cells were treated with 100 nM T3 or with ethanol carrier alone for 6h. Three independent biological repeats were analyzed for each of the three transformant pools (empty plasmid control, TRa1, and TRb1).

2009-08-08 | E-GEOD-17561 | biostudies-arrayexpress

Thyroid hormone-regulated chromatin and transcriptional sensitivity of the pituitary gland

Project description:Thyroid hormone (3,5,3'-triiodothyronine, T3) sensitively influences the pituitary gland, a source of hormones that control tissues throughout the body. The underlying transcriptional response is believed to hinge crucially on interaction of T3 receptors with enhancers in the genome but it remains unknown how T3 regulates pituitary chromatin and how this regulation adjusts to hypothyroid and hyperthyroid conditions.

2023-04-17 | GSE197703 | GEO

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