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ABSTRACT: Liver from CCl4-induced liver fibrosis mice

PROVIDER: PRJNA1065942 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR27597836_1.fastq.gz	Fastqsanger.gz
	SRR27597836_2.fastq.gz	Fastqsanger.gz
	SRR27597837_1.fastq.gz	Fastqsanger.gz
	SRR27597837_2.fastq.gz	Fastqsanger.gz
	SRR27597838_1.fastq.gz	Fastqsanger.gz

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Carbon tetrachloride (CCl4) induced liver fibrosis

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Expression data that were specifically regulated by lncRNA-HELF (ENSMUST00000147617 ) in livers of mice undergoing CCl4-induced liver fibrosis

Project description:Long non-coding RNAs (lncRNAs) are involved in numerous biological functions and pathological processes. In this study, we have identified a novel lncRNA ENSMUST00000147617, named Highly Expressed in Liver Fibrosis (lnc-HELF), which is remarkably up-regulated in mouse and human fibrotic livers. To identify the roles of lnc-HELF in liver fibrosis, we performed RNA-seq to analyze the effect of lnc-HELF deficient on CCl4-induced liver fibrosis. The mice were divided in three groups: mice treated with CCl4 in combination with injection of AAV8-NC (NC_CCl4, n=3), mice treated with CCl4 in combination with injection of AAV8-shRNA-lncHELF1# (sh1_CCl4, n=3) and mice treated with CCl4 in combination with injection of AAV8-shRNA-lncHELF2# (sh2_CCl4, n=3).

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The Genetic Architecture of CCl4-induced Liver Fibrosis in Mice

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A specific Peroxisome Proliferator-Activated Receptor (PPAR)-delta agonist is hepatoprotective and attenuates liver fibrogenesis

Project description:PPARδ is emerging as a key metabolic regulator with pleiotropic actions on various tissues including fat, skeletal muscle and liver. The aim of our study was to assess the effect of either the well-validated PPARδ agonist GW501516, or a novel PPARδ agonist KD3010 in mouse models of liver fibrosis. KD3010, but not GW501516, treated mice had markedly less liver injury induced by carbon tetrachloride (CCl4) injections. Deposition of extracellular matrix proteins was lower in the KD3010 group as compared to the vehicle or GW501516 treated group. Interestingly, profibrogenic CTGF was significantly induced by GW501516, but not KD3010, following CCl4 treatment. The hepatoprotective and antifibrotic effect of KD3010 was confirmed in a model of cholestasis-induced liver injury and fibrosis using bile duct ligation for three weeks. Hepatocytes were identified as targets for PPARδ agonist, and primary hepatocytes treated with KD3010 showed decreased serum starvation or CCl4-induced cell death, while GW501516 treated hepatocytes were not protected. KD3010 treatment of hepatocytes decreased reactive oxygen species (ROS) production after CCl4 exposure. In conclusion, our data demonstrate that a novel PPARδ agonist has hepatoprotective and antifibrotic effects in animal models of liver fibrosis. Given the oral availability and the favorable pharmacologic profile of KD3010, ligand activation of PPARδ represents an attractive and promising target for patients with chronic liver diseases. Total RNA was extracted from primary mouse hepatocytes treated with DMSO or PPARd agonists (KD3010, GW1516)

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Blocking the activation of TGFβ signaling in liver sinusoidal endothelial cells alleviates liver fibrosis in mice

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Gene Expression Analysis of Fibrotic Liver

Project description:Analysis at the gene epression level of mice that had CCl4 induced liver fibrosis with either FSP1+ cells or aSMA+ cells ablated.

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Project description:Background & Aims Parathyroid hormone receptor-1 (PTH1R) is a class B G protein-coupled receptor central to skeletal development, bone turnover, and calcium homeostasis. However, the role of PTH1R signaling in liver fibrosis is largely unknown. Here, the role of PTH1R signaling in the activation of hepatic stellate cells (HSCs) and hepatic fibrosis was examined. Approach & Results PTH1R was highly expressed in activated HSCs and fibrotic liver by using human liver specimens or carbon tetrachloride (CCl4)-treated or methionine and choline-deficient diet (MCD)-fed C57/BL6 mice. The mRNA level of hepatic PTH1R was positively correlated to α-smooth muscle actin (α-SMA) in patients with liver cirrhosis. Mice with HSCs-specific PTH1R deletion were protected from CCl4, MCD, or western diet plus low-dose CCl4-induced liver fibrosis. Conversely, parathyroid hormone (PTH) aggravated liver fibrosis in CCl4-treated mice. Mouse primary HSCs and LX2 cell lines were used for in vitro experiments. Molecular analyses by luciferase reporter assays and chromatin-immunoprecipitation assays in combination with mRNA sequencing in HSCs revealed that cAMP response element-binding protein-like 2 (Crebl2), a novel regulator in HSCs treated by PTH that interacted with Mothers against decapentaplegic homolog 3 (SMAD3) and increased the transcription of transforming growth factor β (TGFβ) in activating HSCs and collagen deposition. In agreement, HSCs-specific Crebl2 deletion ameliorated PTH-induced liver fibrosis in CCl4-treated mice. Conclusions In both mouse and human models, we found that PTH1R was highly expressed in activated HSCs and fibrotic liver. PTH1R signaling regulated collagen production in the HSCs via Crebl2/SMAD3/TGFβ regulatory circuits. Blockade of PTH1R signaling in HSCs might help mitigate the development of liver fibrosis.

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