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- W2002661799 abstract "Free fatty acids (FFAs) cause insulin resistance and are often elevated in obesity. Chronic ingestion of diets rich in saturated fat induces more insulin resistance than diets rich in unsaturated fat, however, it remains unclear whether different FFAs cause distinct levels of insulin resistance in the short-term, which is relevant to the feeding and fasting cycle. Protein kinase C (PKC)-δ is implicated in hepatic insulin resistance. Therefore, we investigated the effects of short-term elevation of fatty acids with different degrees of unsaturation on hepatic insulin action and liver PKC-δ membrane translocation, a marker of activation.Triglyceride emulsions of Soybean Oil+Heparin (polyunsaturated (POLY)), Olive Oil+Heparin (monounsaturated (MONO)), Lard Oil+Heparin (saturated (SATU)), or saline (SAL) were infused intravenously for 7h to elevate plasma FFA concentrations ~3-4 fold in rats. During the last 2h of infusion, a hyperinsulinemic-euglycemic clamp with tritiated glucose methodology was performed to examine hepatic and peripheral insulin sensitivity.Surprisingly, SATU, MONO, and POLY impaired peripheral insulin sensitivity (glucose utilization divided by insulin) to a similar extent. Furthermore, all lipids induced a similar degree of hepatic insulin resistance compared to SAL. Although there were changes in hepatic content of lipid metabolites, there were no significant differences in liver PKC-δ membrane translocation across fat groups.In summary, in the short-term, FFAs with different degrees of unsaturation impair peripheral insulin sensitivity and induce hepatic insulin resistance as well as hepatic PKC-δ translocation to the same extent." @default.
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- W2002661799 date "2015-02-01" @default.
- W2002661799 modified "2023-09-29" @default.
- W2002661799 title "In vivo effects of polyunsaturated, monounsaturated, and saturated fatty acids on hepatic and peripheral insulin sensitivity" @default.
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- W2002661799 doi "https://doi.org/10.1016/j.metabol.2014.10.019" @default.
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