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Transcriptional profiling of hepatic macrophages isolated from mice with high-fat diet -induced non-alcoholic fatty liver disease

ABSTRACT: Transcriptional profiling of hepatic macrophages isolated from mice with high-fat diet -induced non-alcoholic fatty liver disease

PROVIDER: PRJNA912247 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR22742686_1.fastq.gz	Fastqsanger.gz
	SRR22742686_2.fastq.gz	Fastqsanger.gz
	SRR22742687_1.fastq.gz	Fastqsanger.gz
	SRR22742687_2.fastq.gz	Fastqsanger.gz
	SRR22742688_1.fastq.gz	Fastqsanger.gz

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Transcriptional profiling of hepatic macrophages isolated from mice with high-fat diet -induced non-alcoholic fatty liver disease

Project description:Purpose: The goals of this study were to identify preferential gene expression signatures that are unique to hepatic macrophages in high-fat diet -induced non-alcoholic fatty liver disease. Methods and results: Wild-type and Casp11-/- mice were treated with high fat and normal chow diet for a period of 12 weeks. Hepatic macrophages from liver were isolated to generate mRNA transcription. Conclusion: Our study represents detailed analysis of caspase-11 in regulating hepatic macrophages in high-fat diet -induced non-alcoholic fatty liver disease.

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Project description:Non-alcoholic fatty liver (NAFL) has the potential to progress to non-alcoholic steatohepatitis (NASH) or to promote type 2 diabetes mellitus (T2DM). However, NASH and T2DM do not always develop coordinately. We established rat models of NAFL, NASH, and NAFL + T2DM to recapitulate different phenotypes associated with NAFLD and its progression. Microarrays were used to identify hepatic gene expression changes in each of these models. The goal is to identify a predictor of different NAFLD progressions. Non-alcoholic fatty liver disease (NAFLD) is recognized as a low-grade systemic inflammatory state with both hepatic and extra-hepatic manifestations. We aimed to identify common key regulators and adaptive pathways in different NAFLD phenotypes. NAFL, NASH and NAFL+T2DM rat models were used to represent simple fatty liver, fatty liver with severe hepatic manifestations, and fatty liver with severe metabolic manifestations, respectively. We applied microarray analysis to characterize the key regulators and adaptive pathways in different NAFLD phenotypes. There are 12 samples in our study which belonged to 4 groups, and each group contains 3 different samples.

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Project description:In this study, we explored the role of macrophage scavenger receptor 1 (MSR1) in the progression of non-alcoholic fatty liver disease. Mice lacking Msr1 proved to be protected against high fat-cholesterol diet (HFD)-induced metabolic disorder, showing fewer hepatic lipid-laden foamy macrophages, less hepatic inflammation and changed lipid metabolism.

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Project description:Non-alcoholic fatty liver disease (NAFLD) is most prevalent form of liver disease, affecting over 30% of Americans. Perfluoroalkyl substances (PFAS) represent a family of environmental toxicants that have infiltrated the living world. This study explores diet-PFAS interactions and their potential role in the increasing global incidence of NAFLD. Male C57BL/6 mice were fed with either a low-fat diet (11% kcal from fat) or a high fat (58% kcal from fat) high carbohydrate (42g/L) diet with or without PFOS or PFHxS in feed (0.0003% w/w) for 29 weeks. Proteomic, lipidomic, and gene expression measurement techniques were utilized to explore mechanistic pathways. With administration of a high fat high carbohydrate (HFHC) diet, PFOS and PFHxS augmented macrovesicular steatosis, indicative of fatty liver. There was a clear shift in the lipidome of the serum phosphatidylcholines, phosphatidylethanolamines, and triglycerides with PFAS exposure. Finally, chain length exerted significant influence on tissue partitioning and the resulting hepatic gene and protein signatures of PFHxS and PFOS in vivo.

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An intermittent caloric restriction / medium fat diet protects liver from the progression of non-alcoholic fatty liver disease in C57BL/6J mice

Project description:Background & Aims: In this study, we investigated metabolic and molecular effects of weekly intervening 30% calorie restriction on long term natural progression of non-alcoholic fatty liver disease (NAFLD), which was induced by a medium fat diet. Methods: Male C57BL/6J mice of 9 weeks old received either (1) a control (C), (2) a calorie restricted (CR), (3) a medium fat (MF; 25%fat) or (4) an intermittent diet (ID), a weekly alternating diet consisting of calorie restriction and medium fat diet ad libitum until sacrifice at the age of 12 months. Various metabolic and molecular features of the liver were examined. Results: The ID regimen improved the status of a range of metabolic parameters and showed no progression to NAFLD: proper glucose tolerance, low hepatic triglyceride content, low plasma alanine aminotransferase and no abnormalities in its liver morphological features; similarly to that of CR. In contrast, the metabolic parameters in a number of the C and MF animals indicated development of NAFLD and hepatic fibrosis, which was positively correlated with body weight. Despite the metabolic phenotypes similarity, the liver gene expression profile of ID-fed mice did not reflect that of CR mice and resembled more to C and MF-fed mice with similar low body weight. Conclusions: Our study reveals that ID is beneficial for metabolic health and prevents the development of NAFLD in mice, with a gene expression profile similar to C and MF diet in a body weight-dependent manner.

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Project description:Perfluoroalkyl substances (PFASs) are a family of toxicants universally detected in human serum and known to cause dyslipidemia in animals and humans. Non-alcoholic fatty liver disease (NAFLD) is most prevalent form of liver disease in the United States and has been rising in global prevalence over recent years. This study explored diet-PFAS interactions and their potential role in the increasing global incidence of NAFLD. Male C57BL/6 mice were fed with either a low-fat diet (10% kcal from fat) or a moderately high fat diet (45% kcal from fat) with or without perfluorooctanesulfonic acid (PFOS) or perfluorononanoic acid (PFNA) at a low dose of 0.0003% w/w in feed for 12 weeks. Livers were excised for histology and quantification of PFASs and lipids. Proteomics and transcriptomics were utilized to conduct mechanistic pathway exploration. In a high fat diet, PFOS and PFNA protected against the onset of hepatic lipid accumulation and inflammatory progression. Genes and proteins related to lipid metabolism, synthesis, transport, and storage were modulated by PFAS exposure and further impacted by the presence of dietary fat. When combined with a high fat diet, low dose PFOS and PFNA are protective against the onset of NAFLD suggesting that dietary fat impacts the behavior of PFASs in vivo. Furthermore, both dietary fat content and the chemical functional head group exerted significant influence on tissue partitioning and the resulting hepatic biochemical signature.

2021-02-18 | PXD015977 | Pride

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