Studies on the effect of wheat gluten diets in pregnant rats and improvement of its nutritional effect

研究了麦胶蛋白饲粮对妊娠大鼠分娩和子代生长的影响及赖氨酸对麦胶蛋白饲粮的补充作用。妊娠大鼠分别饲喂蛋白水平为5%（G5）、10%（G10）、20%（G20）和30%（G30）的麦麸蛋白饲粮，赖氨酸添加水平分别为0.4%（G5+L）、0.5%（G10+L）、0.8%（G20+L）和1.0%（G30+L）。对照组为纯全蛋蛋白含量为10%的蛋白质饲粮。各组在哺乳期均转为正常饮食。虽然饲喂麦筋饲料的妊娠大鼠均能怀孕和分娩，但G5组、G5+L组和G10组中有部分出现新生儿死亡和生长发育迟缓。G5组和G5+L组泌乳期间子代死亡率均高于对照组。赖氨酸在小麦蛋白饲粮中添加10%或20%赖氨酸组的补充效果显著。饲粮中添加赖氨酸的小麦蛋白含量分别为20%、30%和30%，与对照组相比，新生幼鼠的生长情况基本相同。妊娠期因蛋白质缺乏引起的幼犬生长迟缓，可通过哺乳期间正常饮食恢复。10%小麦蛋白饲粮添加赖氨酸组和20%小麦蛋白饲粮添加赖氨酸组的子代在出生后第21天的生长情况与对照组基本相同。

Influence of wheat gluten diets for pregnant rats on the maternal delivery and the growth of the progeny and supplementary effects of lysine to wheat gluten diets studied. Pregnant rats were fed on wheat gluten diets at protein level of 5%(G5), 10%(G10),20%(G20) and 30%(G30), and also the diets added with L lysine at level of 0.4%(G5+L), 0.5%(G10+L), 0.8%(G20+L), and 1.0%(G30+L), respectively. Control was set at 10% protein diet of purified whole egg protein. Every group of diet was converted to normal one during lactation.Although all groups of pregnant rats fed on the wheat gluten diets performed pregnancy and delivery, some in the groups of G5, G5+L and G10 showed neonatal death and stunted growth. The mortality rate of the progeny in G5 and G5+L groups during the period of lactation was higher than that of the control group. Supplementary effects of lysine were significantly observed in the groups fed on 10% or 20% wheat protein diets with lysine. Newborn pups of groups fed on 20% or 30% wheat protein diets with lysine and also on 30% wheat protein diet showed almost the same growth compared with the rats of the control group. The growth retardation of newborn pups caused by deficiency of protein during pregnancy can be recovered by normal diet during lactation. The progeny of groups fed on 10% wheat protein diets with lysine and also on 20% wheat protein diet showed almost the same growth compared with the progeny of the control group at 21st day after birth.