homeostasis/metabolism
• males and females have more serum lipid than wild-type mice
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• serum free fatty acid levels are increased by 40% relative to wild-type mice
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• fasting triglyceride levels are increased relative to in wild-type mice
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• in a euglycemic clamp assay, mice require a reduced rate of glucose infusion compared to wild-type mice to maintain euglycemia
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• in mice fed ad libitum, serum glucose levels are increased
• circulating glucose levels are higher in males than in females
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• circulating insulin levels are higher in males than in females
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• in mice fed ad libitum, glucose tolerance impairment is comparable to or less severe than in heterozygotes
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• in mice fed ad libitum, insulin tolerance is impairment
• in a euglycemic clamp assay, whole-body insulin resistance is accounted for by decreases in insulin-stimulated whole-body glucose uptake and muscle glucose uptake of 25% and 30%, respectively
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cardiovascular system
• glucose uptake in heart muscle, basally and during insulin treatment, is reduced
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muscle
• glucose uptake in heart muscle, basally and during insulin treatment, is reduced
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• glucose uptake in vastus laterallis muscle is reduced basally and during insulin treatment
• insulin-stimulated [3H]2-deoxyglucose uptake is reduced in slow-twitch (soleus) and fast-twitch (extensor digitorum longus) muscles
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liver/biliary system
• even on a low-fat diet, hepatostetosis occurs and is more pronounced in heterogyzotes than in homozygotes
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adipose tissue
• insulin-stimulated glucose transport is impaired
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growth/size/body
• body weight is increased relative to wild-type mice but is less than for heterozygous mice
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endocrine/exocrine glands
cellular
• insulin-stimulated glucose transport is impaired
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• glucose uptake in heart muscle, basally and during insulin treatment, is reduced
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• glucose uptake in vastus laterallis muscle is reduced basally and during insulin treatment
• insulin-stimulated [3H]2-deoxyglucose uptake is reduced in slow-twitch (soleus) and fast-twitch (extensor digitorum longus) muscles
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