Experimental Hyperlipemia Induces Insulin Resistance in Cats

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The effect of experimental hyperlipemia on insulin sensitivity was evaluated in seven healthy cats. Serum triglyceride and free fatty acid concentrations were significantly (P<0.05) higher when lipid-heparin was administered (2,894 ± 1,526 mg/dl and 4.54 ± 0.70 mEq/l, respectively) than when saline was administered (70 ± 42 mg/dl and 0.22 ± 0.08 mEq/l, respectively). A glucose clamp test revealed that the mean glucose infusion rate when lipid-heparin was administered (5.80 ± 0.67 mg/kg/min) was significantly (P<0.05) lower than when saline was administered (8.52 ± 1.83 mg/kg/min). These results suggest that experimental hyperlipemia induced insulin resistance in the healthy cats.