大豆低聚肽营养吸收特性的研究

The Research on Nutritional Absorbability of Soy Oligopeptides

研究了补充大豆低聚肽和大豆分离蛋白对大鼠氮代谢的影响,并探讨了大鼠小肠对大豆低聚肽的吸收特点。将雄性SD大鼠30只,随机分为:灌喂水对照组、灌喂大豆低聚肽组和灌喂大豆分离蛋白组。大鼠在适应性喂养及膳食平衡1周后,开始进行代谢试验。结果发现,补充大豆分离蛋白后,大鼠氮平衡值、氮储存率、氮净利用率和表观消化率比补水大鼠分别增高641.03%、591.42%、553.11%和51.80%;而补充大豆低聚肽后,大鼠氮平衡值、氮储存率、氮利用率和表观消化率比补充水大鼠分别增高1061.54%、982.69%、921.20%和71.43%(P<0.05);比补充大豆分离蛋白大鼠分别增高56.75%、56.59%、56.36%和12.94%(P<0.05)。由此可得出结论,补充大豆低聚肽可显著提高机体对氮的表观消化率储存率和净氮利用率,并使机体处于较高水平的正氮平衡状态。

This study investigated the effects of soybean protein isolates （SPI） and soy oligopeptides supplementation on nitrogen metabolism in rats, and illustrated the characteristics of absorption on soy oligopeptides supplementation in small intestinal. 30 male SD rats were randomly divided into three groups：water control group, SPI group, soy oligopeptides group.After one week adaptation with general meals and diet balance,the metabolic tests had been undertaken. The results showed that compared with the water control group, the value of nitrogen balance increased 641.03 %, the nitrogen retention rate increased 591.42 %, the net nitrogen utilization increased 553.11% and the apparent digestibility increased 51.80%, respectively, in rats with SPI supplementation.The four values with soy oligopeptides supplementation were increased 1 061.54%, 982.69%, 921.20% and 71.43% （P 〈 0.05） . compared with the water control group, and increased 56.75 %, 56.59 %, 56.36 % and 12.94 % （P 〈 0. 05）, respectively when compared with SPI group. It is concluded that the supplementation of soy oligopeptides could significantly increase the value of nitrogen balance, the nitrogen retention rate, the net nitrogen utilization and the apparent digestibility,and keep the body in a higher level situation of positive nitrogen balance.