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Identify transcriptional regulators of Mc4r in the hypothalamus [ATAC-Seq]

ABSTRACT: Identify transcriptional regulators of Mc4r in the hypothalamus [ATAC-Seq]

PROVIDER: PRJNA1024902 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR26301742_1.fastq.gz	Fastqsanger.gz
	SRR26301742_2.fastq.gz	Fastqsanger.gz
	SRR26301743_1.fastq.gz	Fastqsanger.gz
	SRR26301743_2.fastq.gz	Fastqsanger.gz
	SRR26301744_1.fastq.gz	Fastqsanger.gz

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Identify transcriptional regulators of Mc4r in the hypothalamus

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Project description:Human MC4R mutations can increase or decrease obesity risk. Other than intracellular signaling, MC4R function is also influenced by its levels. However, the genetic programs that govern MC4R transcription in the brain remain largely unknown. Moreover, it is unclear whether human genetic variants exist that affect Mc4r expression and obesity risk. Here, we identify the homeodomain transcription factor Otp as one regulator of Mc4r expression in a specific subset of hypothalamic neurons. Selective loss of Otp in these neurons during development or adulthood results in reduced Mc4r expression and excessive body weight gain. Moreover, OTP interacts with upstream regulatory sequences of Mc4r to modulate its transcription.

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Transcription profiling of pig liver and fat tissues during fasting from animals MC4R D298N variant

Project description:Transcriptional profiling coupled with blood metabolite analyses were used to identify porcine genes and pathways that respond to a fasting treatment or to a D298N missense mutation in the melanocortin-4 receptor (MC4R) gene. Gilts (12 homozygous for D298 and 12 homozygous for N298) were either fed ad libitum or fasted for 3 days. Fasting decreased body weight and backfat and increased serum concentrations of non-esterified fatty acid and urea. In response to fasting, 7,029 genes in fat and 1,831 genes in liver were differentially expressed (DE, q value less than 0.05). MC4R genotype did not affect gene expression, body weight, backfat depth, and any measured serum metabolite concentration. Pathway analyses of fasting-induced DE genes indicated that both liver and fat down-regulated energetically costly processes such as lipid and steroid synthesis and up-regulated efficient energy utilization pathways. Fasting increased expression of genes in involved in glucose sparing pathways in liver and extracellular matrix pathways in adipose tissue. Within the DE genes, transcription factors (TF) that regulate many DE genes were identified, confirming the involvement of TF that are known to regulate fasting response and implicating additional TF that are not known to be involved in energy homeostatic responses. Interestingly, estrogen receptor 1 transcriptionally controls fasting induced genes in fat that are involved in cell matrix morphogenesis. Our findings indicate a transcriptional response to fasting in two key metabolic tissues of pigs that was corroborated by changes in blood metabolites; and involvement of novel putative transcriptional regulators in the immediate adaptive response to fasting. Experiment Overall Design: Gilts (n=24; 12 wildtype and 12 homozygous for D298N) were either fed ad libitum or fasted for 3 days in a completely randomized complete block design with a 2x2 factorial treatment structure.

2009-04-25 | E-GEOD-13528 | biostudies-arrayexpress

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