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SOX9 ameliorates nonalcoholic steatohepatitis through activating AMPK pathway

ABSTRACT: SOX9 ameliorates nonalcoholic steatohepatitis through activating AMPK pathway

PROVIDER: PRJNA993674 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR25238914_1.fastq.gz	Fastqsanger.gz
	SRR25238914_2.fastq.gz	Fastqsanger.gz
	SRR25238915_1.fastq.gz	Fastqsanger.gz
	SRR25238915_2.fastq.gz	Fastqsanger.gz
	SRR25238916_1.fastq.gz	Fastqsanger.gz

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SOX9 ameliorates nonalcoholic steatohepatitis through activating AMPK pathway

Project description:To systemically investigate the mechanism underlying the impact of SOX9 on lipid metabolism in NASH, we performed RNA-seq analysis in liver tissues from Sox9HKO mice and Sox9f/f mice after 6 weeks of MCD feeding.

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Nonalcoholic steatohepatitis in adolescents undergoing bariatric surgery

Project description:The genomic landscape of hepatic tissue affected by nonalcoholic steatohepatitis (NASH) in severely obese adolescents undergoing bariatric surgery is unknown. Our purpose here was to uncover genomic profiles of obese controls, and obese cases with nonalcoholic fatty liver disease (NAFLD), borderline nonalcoholic steatohepatitis, and definite nonalcoholic steatohepatitis, in order to clarify molecular functions, biological processes, and pathways that are dysregulated in nonalcoholic steatohepatitis in the severely obese adolescent. In a prospective observational cohort study, we have intra-operatively obtained 165 liver samples; of these 67 were submited for microarray analysis. Through ANOVA, we found 8648 genes with differential regulation between the four histologies; from these, we uncovered gene signatures shared between borderline and definite nonalcoholic steatohepatitis, and gene sets with differential effects between borderline and definite.

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Liver lipophagy ameliorates nonalcoholic steatohepatitis through lysosomal lipid exocytosis

Project description:Nonalcoholic steatohepatitis (NASH) is a progressive disorder with aberrant lipid accumulation and subsequent inflammatory and profibrotic response. Lipid reduction through cytoplasmic lipolysis might adversely worsen steatohepatitis, however, the effect of autophagic lipolysis, lipophagy, remains obscure. We engineered the adaptor protein to induce lipophagy with lipid droplet targeting signal and modified LC3 interacting region. Activating hepatocyte lipophagy obviously mitigated both steatosis and NASH pathology. Mechanistically, lipophagy promoted the excretion of lipid from liver via lysosomal exocytosis and attenuated harmful accumulation of nonesterified fatty acid. This exocytosis was dependent on Ca2+ signal unlike the lysosomal dysfunction-related exocytosis. High content compound screening identified alpelisib and digoxin, clinically-approved compounds, as effective activators of lipophagy. Administration of alpelisib or digoxin inhibited the transition to steatohepatitis in mice fed high fat with low methionine low choline diet. Given all these data, activating lipophagy may be a promising therapeutic approach to prevent NASH progression.

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DT-109 ameliorates nonalcoholic steatohepatitis in nonhuman primates

Project description:<p>Nonalcoholic steatohepatitis (NASH) prevalence is rising with no pharmacotherapy approved. A major hurdle in NASH drug development is the poor translatability of preclinical studies to safe/effective clinical outcomes, and recent failures highlight a need to identify new targetable pathways. Dysregulated glycine metabolism has emerged as a causative factor and therapeutic target in NASH. Here, we report that the tripeptide DT-109 (Gly-Gly-Leu) dose-dependently attenuates steatohepatitis and fibrosis in mice. To enhance the probability of successful translation, we developed a nonhuman primate model that histologically and transcriptionally mimics human NASH. Applying a multiomics approach combining transcriptomics, proteomics, metabolomics and metagenomics, we found that DT-109 reverses hepatic steatosis and prevents fibrosis progression in nonhuman primates, not only by stimulating fatty acid degradation and glutathione formation, as found in mice, but also by modulating microbial bile acid metabolism. Our studies describe a highly translatable NASH model and highlight the need for clinical evaluation of DT-109.</p>

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Project description:Here, we found that microRNA-223 (miR-223) was highly elevated in hepatocytes after high fat diet (HFD) feeding in mice and in human nonalcoholic steatohepatitis (NASH) samples. Genetic deletion of the miR-223 induced a full spectrum of nonalcoholic fatty liver disease (NAFLD) in mice after long-term (up to one year) HFD feeding including NASH-related steatosis, inflammation, fibrosis and HCC. To better explore the mechanisms underlying the abnormalities observed in HFD-fed miR-223KO mice, we examined hepatic gene expression in 3-month-HFD-fed WT and miR-223KO mice by microarray analysis. Finally, we revealed that miR-223 plays a key role in controlling steatosis-to-NASH progression by inhibiting hepatic Cxcl10 and Taz expression.

2019-03-30 | GSE129080 | GEO

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