Unknown,Transcriptomics,Genomics,Proteomics

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Female Mice Lacking p47phox Have Altered Adipose Tissue Gene Expression and are Protected against High Fat-Induced Obesity and Metabolic Syndrome

ABSTRACT: Oxidative stress in adipose tissue and liver has been linked to the development of obesity. NADPH oxidases (NOX) enzymes are a major source of reactive oxygen species (ROS). The current study was designed to determine if NOX2-generated ROS play a role in development of obesity and metabolic syndrome after high fat feeding. Wild type (WT) mice and mice lacking the cytosolic NOX2 activated protein p47phox (P47KO) were fed AIN-93G diets or high fat diets (HFD) containing 45% fat and 0.5% cholesterol for 13 weeks from weaning. Affymetrix array analysis revealed dramatically less expression of mRNA of genes linked to energy metabolism, adipocyte differentiation (PPARM-NM-3, Runx2) and fatty acid uptake (CD36, lipoprotein lipase) in fat pads from female HFD-P47KO mice compared to HFD-WT females. These data suggest that NOX2 is an important regulator of metabolic homeostasis and that NOX2-associated ROS plays an important role in development of diet-induced obesity particularly in the female fat pads from p47phox and wild type fed a high fat or control diet

ORGANISM(S): Mus musculus

SUBMITTER: Horacio Gomez-Acevedo

PROVIDER: E-GEOD-41932 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Project description:Obesity and diabetes associated visual impairment and vascular dysfunctions are increasing reasons for vision loss. The detailed mechanisms in these diseases are still largely unknown, but mice models have been useful to study these mechanisms and explore the detailed effects of potential compounds. Such compounds usually have antioxidant and anti-inflammatory properties. These properties are found in anthocyanins and a major source of dietary anthocyanins in Nordic diet is bilberries (European wild blueberries, Vaccinium myrtillus). In this explorative study we show results with differentially expressed genes in retina using a high-fat diet (HFD) mouse model. Our findings displayed differential regulation of genes in pathways for apoptosis, inflammation and oxidative stress, especially systemic lupus erythematosus (SLE), mitogen activated protein kinase (MAPK) and glutathione metabolism. Mice fed with HFD had increased retinal gene expression of several crystallins, which was reduced in the retina of mice fed with bilberries. Bilberries seem to reduce the expression of genes in MAPK and to increase the expression of genes in glutathione metabolism pathway. All together despite minor effects in the mouse phenotype, a diet rich in bilberries may prevent the retinal gene expression changes in the early stages of obesity. Mice were fed ad libitum with normal control diet (NCD, 10% kcal fat), high-fat diet (HFD, 45% kcal fat), 5% (w/w) freeze-dried biberries (Vaccinium myrtillus) in NCD (NCD+BB) or HFD (HFD+BB) for 12 weeks. Diets were prepared in Research Diets Inc. Feed consumption and weight gain were measured during the feeding trial, and blood pressure and serum markers of obesity at the end. Retinas were collected and RNA extracted from all 24 mice samples, and pooled retinas from 4 mice per group were hybridized with standard Illumina protocols. The expression in retinas was analyzed using R, Pathvisio and DAVID to screen for differences between high-fat and berry induced changes to control diets and further bilberry induced changes to HFD up- or downregulated transcripts. diet: NCD, HFD, NCD+BB, HFD+BB

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Female Mice Lacking p47phox Have Altered Adipose Tissue Gene Expression and are Protected against High Fat-Induced Obesity and Metabolic Syndrome

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