Abstract
Diabetes is a disease characterized not only by a high blood glucose level but also by high ketone levels. Medium chain triacylglycerols (MCT) are known as functional lipids, but they are rapidly metabolized to produce ketone bodies. In this study, we examined the effects of MCT intake on the pathological condition and energy bioavailability of diabetic animals. Streptozotocin (STZ)-induced diabetic rats were used as animal models for type I diabetes. The pathological condition was estimated through blood biochemical values, and the energy expenditure was calculated based on the respiratory quotient, which was analyzed using a mass spectrometer.Eight-week-old male STZ-induced diabetic Wistar rats were prepared and fed soybean oil (LCT) or MCT diets for 60 days. The survival rate of rats fed the MCT diet was higher than that of rats fed the LCT diet, although no ameliorating effects in the blood biochemical values were observed. In rats fed the LCT diet, their energy expenditure was much higher than their energy intake, whereas the energy balance was approximately equal in rats fed the MCT diet.These results indicated that energy bioavailability may contribute, at least in part, to the high survival rates in the diabetic MCT group, although MCT intake did not definitely improve the pathological condition of the experimental rats.
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