liver/biliary system
• liver is enlarged and yellowish liver in mice fed high fat diet as compared to HFD-fed controls
• liver has moderate to severe macrovesicular/microvesicular steatosis around central veins
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adipose tissue
• increase in interscapular brown adipose tissue as a percentage of body weight in mice fed high fat diet (HFD) for 17 weeks as compared to HFD-fed controls
• however, weight is similar to controls after 30 weeks of treatment
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• decreased fat mass as a percentage of body weight in chow fed mice is observed at 28 weeks of age
• decrease in fat mass as percentage of body weight in mice fed high fat diet (HFD) for 17 weeks as compared to HFD-fed controls
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• color of epididymal white adipose tissue is slightly darker than controls in both chow diet and high fat diet
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• decreased epididymal white adipose tissue (eWAT) weight as a percentage of body weight is observed at 28 weeks of age in chow fed mice
• no differences in brown adipose tissue (BAT) weight are observed on chow diet
• decrease in WAT as percentage of body weight in mice fed high fat diet (HFD) for 17 weeks as compared to HFD-fed controls
• decrease is observed in epididymal, inguinal, retroperitoneal, perirenal WAT and mesentery
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• 76% of adipocytes found in white adipose tissue are small with multiocular lipid droplets
• 79% of adipocytes found in epididymal white adipose tissue in mice fed high fat diet are small with multiocular lipid droplets
• 85% of adipocytes found in mesentery in mice fed high fat diet are small with multiocular lipid droplets
• remaining adipocytes are normal sized with unilocular lipid droplets in mice fed chow diet or high fat diets
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• glucose uptake in WAT from mice on high fat diet is increased, but rate is similar to controls in skeletal muscle and BAT
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behavior/neurological
• activity is increased following 8 weeks of high fat feeding as compared to controls
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growth/size/body
• increased lean mass as a percentage of body weight is observed at 28 weeks of age
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• male and female mice gain less weight on high fat (HFD) diet as compared to HFD-fed controls
• weight increase plateaus after 8 weeks of high fat diet
• decrease in fat mass after 17 weeks on HFD at as compared to HFD-fed controls
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homeostasis/metabolism
• thermogenic capacity is increased following administration of a beta3-adrenergic agonist in mice fed high fat diet as compared to like-treated controls
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• hyperinsulinemia is observed in mice fed high fat diet for 14 weeks as compared to controls
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• dsylipidemia
• basal lipolytic activities are increased in adipocytes in mice on high fat diet
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• increased concentrations of non-essential fatty acids are found in mice fed high fat diet as compared to HFD-fed controls
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• increased serum triglyceride levels are found in mice fed high fat diet as compared to HFD-fed controls
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• elevated serum alanine aminotransferase levels are found in mice fed high fat diet as compared to HFD-fed controls
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• total energy expenditure is increased by 12% in last 6 weeks of 8 week high fat feeding as compared to controls
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• male and female mice gain less weight on high fat (HFD) diet as compared to HFD-fed controls
• weight increase plateaus after 8 weeks of high fat diet
• decrease in fat mass after 17 weeks on HFD at as compared to HFD-fed controls
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• resting oxygen consumption is increased following 8 weeks of high fat feeding as compared to controls
• total whole body oxygen consumption is increased following 8 weeks of high fat feeding as compared to controls
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• RER is decreased following 8 weeks of high fat feeding as compared to controls
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• decreased insulin sensitivity in male and female mice fed high fat diet for 13 weeks as compared to controls
• other observations include: increased HOMA index, decreased glucose infusion rate in hyperinsulinemic-euglycemic clamp study,
decreased whole body glycolysis rate, but an unchanged rate of glucose disappearance
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cellular
• glucose uptake in WAT from mice on high fat diet is increased, but rate is similar to controls in skeletal muscle and BAT
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