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- W2024781917 abstract "This study sought to investigate the effect of calorie restriction (CR) on skeletal muscle sphingolipid metabolism and its contribution to improved insulin action in rats after a 6-month feeding study. Twenty nine (29) male Fischer 344 rats were randomized to an ad libitum (AL) diet or 30% CR. Dietary intake, body weight and insulin sensitivity were monitored. After 6 months, skeletal muscle (vastus lateralis) was obtained for insulin signaling and lipid profiling. CR significantly decreased insulin and glucose levels and also altered the expression and activity of proteins involved in sphingolipid formation and metabolism. The quantities of ceramides significantly increased in CR animals (P<.05; n=14-15), while ceramide metabolism products (i.e., glycosphingolipids: hexosylceramides and lactosylceramides) significantly decreased (P<.05; n=14-15). Ceramide phosphates, sphingomyelins, sphingosine and sphingosine phosphate were not significantly different between AL and CR groups (P=ns; n=14-15). Lactosylceramide quantities correlated significantly with surrogate markers of insulin resistance (homeostasis model of assessment on insulin resistance) (r=0.7; P<.005). Products of ceramide metabolism (glycosphingolipids), known to interfere with insulin signaling at elevated levels, were significantly reduced in the skeletal muscle of CR animals. The increase in insulin sensitivity is associated with glycosphingolipid levels." @default.
- W2024781917 created "2016-06-24" @default.
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- W2024781917 date "2015-07-01" @default.
- W2024781917 modified "2023-10-18" @default.
- W2024781917 title "Modulation of sphingolipid metabolism with calorie restriction enhances insulin action in skeletal muscle" @default.
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- W2024781917 doi "https://doi.org/10.1016/j.jnutbio.2015.01.007" @default.
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