低マグネシウム血症めん羊における各栄養素の酸化割合について〔英文〕

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The experiment was conducted to determine the effect of hypomagnesemia induced by feeding a low magnesium (Mg) and high potassium (K) diet on lipid concentrations in plasma and rates of oxidation of primary nutrients in sheep. Sheep were fed either a control or low Mg/high K diet containing 0.38 and 0.05% magnesium on dry matter basis, respectively for over 10 days. Insulin-induced glucose uptake was measured using a euglycemic clamp technique, and respiratory gas analysis was performed to estimate oxidation rates of carbohydrate, fat and protein in the 24-hr starved state and during the euglycemic clamp experiment. Sheep fed the low magnesium (Mg) /high potassium (K) diet had lower (P<.01) plasma Mg levels than the control diet-fed group. Plasma phospholipids elevated (P<.10), and triglycerides and free fatty acids tended to increase in the hypomagnesemic sheep fed the low Mg/high K diet. In the euglycemic clamp experiment, insulin-induced glucose uptake tended to decrease in the hypomagnesemic group, but not significantly. The diet treatment and euglycemic clamp experiment did not affect energy expenditure (heat production), but the low Mg/high K diet-fed sheep had slightly reduced (P<.13) non-protein respiratory quotient (RQ). The low Mg/high K diet feeding increased (P<.06) fat oxidation rate, and tended to decrease carbohydrate oxidation rate, though the rates of oxidation were unaffected by performing the euglycemic clamp experiment. These results indicated that hypomagnesemia induced by a low Mg/high K diet feeding stimulated lipid metabolism, and increased the fat oxidation rate in sheep.
社団法人日本畜産学会の論文

低マグネシウム血症めん羊における各栄養素の酸化割合について〔英文〕

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