Horikawa Yoko, Uehara Daisuke, Matsuda Koichi, F Sakata Shigeko, Tamaki Nanaya
Faculty of Nutrition, Kobe-Gakuin University, Kobe, Japan.
J Nutr Sci Vitaminol (Tokyo). 2008 Jun;54(3):203-9. doi: 10.3177/jnsv.54.203.
This study examined whether the chain length of glucose in the diet could affect the selection of foods by Zn-adequate and Zn-deficient rats. Dextrin, maltose and glucose were used as sources of carbohydrate in the diet and the selection patterns of the rats were analyzed for 28 d by a 3-choice selection. Diets provided as a set of three either Zn-adequate or Zn-deficient diets were rotated daily. The Zn-adequate control rats selected widely from the three diets throughout the 28 d. In contrast, rats fed a Zn-deficient diet selected exclusively and continuously the dextrin diet or dextrin and glucose diets from the three diets over the experimental periods. The average daily total food intakes of rats fed a Zn-deficient diet were very significantly decreased. The selections of dextrin, maltose and glucose diets in the 3-choice methods of the control rats were 5.7+/-1.6(b), 5.8+/-2.0(b) and 2.7+/-0.9(a) g/d, respectively (p<0.05), and those of the Zn-deficient rats were 6.4+/-2.5(c), 0.8+/-1.3(a) and 2.6+/-1.4(b) g/d, respectively (p<0.05). The ratios of the selected maltose-diet in the Zn-adequate control and the Zn-deficient rats were 40.8+/-13.8 and 9.0+/-15.6%, respectively (p<0.01) and those of the dextrin-diet were 40.3+/-11.4 and 63.0+/-22.3%, respectively (p<0.05). The decreased preference for the maltose-diet in the Zn-deficient rats may reflect the increased selection of the dextrin-diet.
本研究考察了饮食中葡萄糖的链长是否会影响锌充足和锌缺乏大鼠对食物的选择。糊精、麦芽糖和葡萄糖被用作饮食中的碳水化合物来源，通过三选法对大鼠的选择模式进行了28天的分析。每天轮换提供一组三种锌充足或锌缺乏的饮食。锌充足的对照大鼠在整个28天内广泛选择这三种饮食。相比之下，喂食锌缺乏饮食的大鼠在实验期间从三种饮食中专门且持续地选择糊精饮食或糊精和葡萄糖饮食。喂食锌缺乏饮食的大鼠的平均每日总食物摄入量显著降低。对照大鼠在三选法中对糊精、麦芽糖和葡萄糖饮食的选择量分别为5.7±1.6(b)、5.8±2.0(b)和2.7±0.9(a)克/天（p<0.05），而锌缺乏大鼠的选择量分别为6.4±2.5(c)、0.8±1.3(a)和2.6±1.4(b)克/天（p<0.05）。锌充足的对照大鼠和锌缺乏大鼠中选择麦芽糖饮食的比例分别为40.8±13.8%和9.0±15.6%（p<0.01），选择糊精饮食的比例分别为40.3±11.4%和63.0±22.3%（p<0.05）。锌缺乏大鼠对麦芽糖饮食偏好的降低可能反映了对糊精饮食选择的增加。
