Esteve M, Rafecas I, Fernández-López J A, Remesar X, Alemany M
Departament de Bioquímica i Fisiologia, Universitat de Barcelona, Spain.
Physiol Behav. 1994 Jul;56(1):65-71. doi: 10.1016/0031-9384(94)90262-3.
The energy balance and nutrient selection strategies of 30-day-old Wistar rats offered a reference pellet and a seven-item cafeteria diet were studied in two consecutive 15-day periods: 30-45 and 45-60 days after birth. Cafeteria-fed rats grew faster, incorporating more fat and water, but a similar amount of protein to reference-fed animals. In the second 15 days all rats ate less and produced less heat than in the first 15 days. Reference-fed rats also deposited less energy in their bodies, in contrast to the tendency towards higher carcass energy deposition in cafeteria-fed rats. Cafeteria-fed rats selected much more fat and sugars than controls, with similar protein and less starch; in the second period studied, cafeteria-fed rats significantly increased their sugar consumption, with no change in fat or protein. It is suggested that the switch to selecting more sugars may be an essential factor in the shift towards increased fat deposition at the expense of heat production in cafeteria-fed rats.
对30日龄的Wistar大鼠在两个连续的15天时间段（出生后30 - 45天和45 - 60天）进行了研究，这些大鼠可选择标准颗粒饲料和七种食物组成的自助餐式饮食。食用自助餐式饮食的大鼠生长更快，摄入了更多的脂肪和水分，但摄入的蛋白质量与食用标准颗粒饲料的动物相似。在第二个15天里，所有大鼠的食量都比第一个15天减少，产热也减少。与食用自助餐式饮食的大鼠体脂能量沉积增加的趋势相反，食用标准颗粒饲料的大鼠体内沉积的能量也减少。食用自助餐式饮食的大鼠比对照组选择了更多的脂肪和糖类，蛋白质摄入量相似，淀粉摄入量较少；在第二个研究时间段，食用自助餐式饮食的大鼠显著增加了糖类消耗，脂肪和蛋白质摄入量无变化。研究表明，转而选择更多糖类可能是食用自助餐式饮食的大鼠以产热为代价增加脂肪沉积转变的一个关键因素。
