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Sequential responses to high-fat feeding in an obese mouse model

ABSTRACT: We examined the effects of high-fat diet on feeding behaviour, body weight regulation and common biomarkers associated with weight gain in the C57BL/6J mice over a period of 10 weeks, making measurements at weeks 2, 4 and 10. We examined the transcriptomic profile of hepatic genes involved in the major lipid metabolic pathways, validating the key genes with quantitative real-time reverse-transcription PCR (qRT-PCR) and their gene products with western blots. Keywords: Lipogenesis, Hyperphagia, Fat Oxidation, Energy Regulation, Body Weight

ORGANISM(S): Mus musculus

PROVIDER: GSE8753 | GEO | 2007/12/01

SECONDARY ACCESSION(S): PRJNA102023

REPOSITORIES: GEO

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Transcription profiling of mouse model of obesity during high fat feeding

Project description:We examined the effects of high-fat diet on feeding behaviour, body weight regulation and common biomarkers associated with weight gain in the C57BL/6J mice over a period of 10 weeks, making measurements at weeks 2, 4 and 10. We examined the transcriptomic profile of hepatic genes involved in the major lipid metabolic pathways, validating the key genes with quantitative real-time reverse-transcription PCR (qRT-PCR) and their gene products with western blots. Experiment Overall Design: C57BL/6J mice were randomly assigned to consume either the control (C) or HFC diet. Body weights and food intake were measured weekly and other measurements at weeks 2, 4 and 10. Microarrays were used to screen the transcriptional response of the livers at the 3 time-points. Genes, encoding enzymes regulating key steps of lipid metabolism, were then selected from the microarray data for validation by qRT-PCR and their protein expression by western blot assays.

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Adiponectin-cre FTO flox/flox and FTO flox/flox mouse white fat tissues

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Transcription profiling of mouse strains A/J versus C57BL/6J during diet-induced obesity

Project description:The effects of high-fat (HF) feeding on the gene expression in the small intestine were examined using obesity-resistant A/J mice and obesity-sensitive C57BL/6J (B6) mice. Both strains of mice were maintained on low-fat (LF, 5% fat) or HF (30% fat) diets for two weeks. Oligonucleotide microarray and semi-quantitative RT-PCR analysis revealed that lipid metabolism-related genes including mitochondrial acyl-CoA thioesterase 1, pyruvate dehydrogenase kinase 4, and NADP+-dependent cytosolic malic enzyme were up-regulated by more than 2-fold in both strains of mice. The up-regulated gene expression levels were significantly higher in A/J mice than in B6 mice, suggesting the active lipid metabolism in the small intestine of A/J mice. Experiment Overall Design: Mice were maintained on the LF or HF diet for two weeks. For each group (n=6), pooled total RNA from two mice of average body weight was used for the analysis.

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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

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transcription profiling by array of C57BL/6J mice fed a Western-style diet with or without 0.05% quercetin against mice on a control diet to study the effect of quercetin on obesity and hepatic gene expression

Project description:To determine the effect of consumption of a quercetin-rich diet on obesity and dysregulated hepatic gene expression, C56BL/6J mice were fed for 20 weeks on control or a Western diet high in fat, cholesterol and sucrose, both with or without 0.05% quercetin. Chronic dietary intake of quercetin reduced body weight gain and visceral and liver fat accumulation, and improved hyperglyceamia, hyperinsulinaemia, dyslipidaemia in mice fed a Western-style diet. Feeding a Western-style diet altered expression of genes related to inflammatory responses, lipid metabolism and oxidative phosphorylation in C57BL/6J mice after 20 weeks. The results from exhaustive gene expression analysis showed that quercetin minimally influenced hepatic gene expression in mice fed the Western diet. The gene screening results (GSEA) were consistent with the notion that it did improve mitochondrial function to some extent. Quantitative RT-PCR analysis indicated that quercetin did influence important regulators of fat accumulation and metabolic disorders. Our results suggest that quercetin reduces fat accumulation presumably through decreasing oxidative stress and increasing PPARα expression, and the following improvement of gene expression related to steatosis in the liver. C56BL/6J mice were fed for 20 weeks on AIN93G (con) or a Western diet high in fat, cholesterol and sucrose, both with or without 0.05% quercetin for 20 weeks.

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Project description:Timecourse analysis of the effect high fat and low fat diets have on liver gene expression. C57 and AJ strains examined at 0, 1, 3, 4, 5 ,6, 7, 8, 9, 10 and 11 weeks. Keywords: other

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