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- W1978397013 abstract "Obesity and alterations of lipid homeostasis are hallmarks of the metabolic syndrome and largely influenced by the dietary conditions of the individual. Although heritability is considered to be a major risk factor, the almost 40 candidate genes identified by genome-wide association studies (GWAS) so far account for only 5–10% of the observed variance in BMI in human subjects. Alternatively, diet-induced changes of epigenetic gene regulation might be involved in disturbed lipid homeostasis and weight development. The aim of this study was to investigate how a high-carbohydrate diet (HCD; 70 kcal% from carbohydrates, 10 kcal% from fat) or a high-fat diet (HFD; 20 kcal% from carbohydrates, 60 kcal% from fat) affects hepatic expression of genes involved in fatty acid metabolism and if these alterations are correlated to changes in promoter methylation. Expression of stearoyl-CoA desaturase 1 (<i>Scd1</i>) was lower in livers from HFD-fed C57BL/6 J mice compared to HCD-fed animals and correlated inversely with the degree of DNA methylation at 2 distinct, adjacent CpG sites in the <i>Scd1</i> promoter. In contrast, expression of transcription factors peroxisome proliferator activated receptor alpha and gamma (<i>Ppara</i>, <i>Pparg</i>), and sterol regulatory element binding transcription factor 1 (<i>Srebf1</i>) was not affected. The degree of hepatic <i>Scd1</i> promoter methylation at these CpG sites correlated positively to fat mass and serum leptin levels, whereas serum ghrelin levels were inversely correlated with methylation at both CpG sites. Taken together, hepatic expression of <i>Scd1</i> is differentially affected by carbohydrate- and lipid content of the diet. These differences in <i>Scd1</i> expression are associated with altered promoter methylation, indicating that diets affect lipid metabolism in the liver via epigenetic mechanisms." @default.
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- W1978397013 date "2013-06-26" @default.
- W1978397013 modified "2023-10-16" @default.
- W1978397013 title "Diet-dependent Alterations of Hepatic Scd1 Expression are Accompanied by Differences in Promoter Methylation" @default.
- W1978397013 doi "https://doi.org/10.1055/s-0033-1348263" @default.
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