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Thyroid hormone receptor beta1 action in the resolution of liver fibrosis [bulk RNA-seq]

ABSTRACT: Thyroid hormone receptor beta1 action in the resolution of liver fibrosis [bulk RNA-seq]

PROVIDER: PRJNA927283 | ENA |

REPOSITORIES: ENA

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			Action	DRS
		Other
	SRR23217362_1.fastq.gz	Fastqsanger.gz
	SRR23217362_2.fastq.gz	Fastqsanger.gz
	SRR23217363_1.fastq.gz	Fastqsanger.gz
	SRR23217363_2.fastq.gz	Fastqsanger.gz

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Thyroid hormone receptor beta1 action in the resolution of liver fibrosis

Project description:Thyroid hormone receptor beta1 action in the resolution of liver fibrosis

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Thyroid hormone receptor beta1 action in the resolution of liver fibrosis

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Thyroid hormone receptor a in skeletal muscle is essential for thyroid thermogenesis

Project description:Thyroid hormones are important for homeostatic control of energy metabolism and body temperature. Although skeletal muscle is considered an important site for thyroid action, the contribution of thyroid hormone receptor signaling, in muscle, to whole-body energy metabolism and body temperature has not been resolved. Here, we show that thyroid hormone-induced increase in energy expenditure requires thyroid hormone receptor alpha 1 (TRa1) in skeletal muscle, but that thyroid hormone induced elevation in body temperature is independent of muscle-TRa1. In slow-twitch soleus muscle, ablation of TRa1 leads to an altered fiber type composition toward a more oxidative phenotype, which, however, does not influence running capacity or motivation to voluntary running. RNA-sequencing of soleus muscle from WT mice and TRaHSACre mice revealed differentiated transcriptional regulation of genes associated with muscle thermogenesis, such as sarcolipin and UCP3, thus providing molecular clues pertaining to the mechanistic underpinnings of TRa1-linked control of whole-body metabolic rate. Together, this work establishes a fundamental role for skeletal muscle in thyroid hormone-stimulated increase in whole-body energy expenditure.

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Project description:Animals adapt to environmental conditions by modifying the function of their internal organs, including the brain. To be adaptive, alterations in behavior must be coordinated with the functional state of organs throughout the body. Here we find that thyroid hormone--a regulator of metabolism in many peripheral organs--directly activates cell-type specific transcriptional programs in frontal cortex of adult male mice. These programs are enriched for axon-guidance genes in glutamatergic projection neurons, synaptic regulatory genes in both astrocytes and neurons, and pro-myelination factors in oligodendrocytes, suggesting widespread plasticity of cortical circuits. Indeed, whole-cell electrophysiology revealed that thyroid hormone alters excitatory and inhibitory synaptic transmission, an effect that requires thyroid hormone-induced gene regulatory programs in presynaptic neurons. Furthermore, thyroid hormone action in frontal cortex regulates innate exploratory behaviors and causally promotes exploratory decision-making. Thus, thyroid hormone acts directly on cerebral cortex in males to coordinate exploratory behaviors with whole-body metabolic state.

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NCoR1 and SMRT play unique roles in thyroid hormone signaling in the liver

Project description:NCoR1 (Nuclear receptor Co-Repressor) and SMRT (Silencing Mediator of Retinoid and Thyroid hormone receptor) are well-recognized coregulators of nuclear receptor (NR) action. However, their unique roles in the regulation of thyroid hormone (TH) signaling in specific cell types have not been determined. To accomplish this we generated a mouse model that lacked function of either NCoR1 or SMRT or both in the liver only. Despite both corepressors being present in the liver, SMRT had no ability to regulate TH signaling when deleted in either euthyroid or hypothyroid animals. In contrast, disruption of NCoR1 action confirmed that it is the principal mediator of TH sensitivity in vivo. While SMRT played little role in TH signaling alone, when disrupted in combination with NCoR1 it greatly accentuated the activation of hepatic lipogenesis regulated by NCoR1. Thus, corepressor specificity exists in vivo and NCoR1 is the principal regulator of TH action in the liver. However, both NCoR1 and SMRT collaborate to control hepatic lipogenesis and lipid storage, which likely reflects their cooperative activity in regulating the action of multiple NRs including the thyroid hormone receptor (TR). RNA was extracted from livers from 3 individual mice for each group (Double-floxed, Liver specific-SMRT knock out, and Liver specific-double knock out); all were euthyroid, female mice

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Project description:Thyroid hormone receptor beta is required for thyrotrpin regulation and thyroid hormone production.

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A coregulator shift, rather than the canonical switch, underlies thyroid hormone action in liver

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

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2019-05-13 | GSE130816 | GEO

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