Thibault L, Roberge A G
Laboratoire de Neurochimie et de Nutrition, Faculté des Sciences de l'Agriculture et de l'Alimentation, Université Laval, Ste-Foy, Québec, Canada.
Physiol Behav. 1988;42(1):1-5. doi: 10.1016/0031-9384(88)90251-x.
Adult cats were adapted to hypoglucidic semi-purified diets containing casein or soya as the protein source to study the effects of a 2 hr immobilization period. Body weight of cats fed hypoglucidic diets was significantly decreased. The control casein group showed higher plasma dopamine-beta-hydroxylase activity but lower pyridoxal 5'-phosphate level than control soya group. Cats fed hypoglucidic casein diet, plasma glucose, insulin and pyridoxal 5'-phosphate levels were increased whereas cats fed hypoglucidic soya diet, pyridoxal 5'-phosphate levels were decreased and dopamine-beta-hydroxylase activity increased when data were compared to their respective control groups. A 2 hr immobilization period induced hyperglycemia in all groups whereas cats fed soya diets, plasma insulin level and dopamine-beta-hydroxylase activity were significantly increased and pyridoxal 5'-phosphate content significantly decreased. These results demonstrate that dietary casein and soya protein might be differentiated on a physiological basis and immobilization emphasized the biochemical disturbances observed between the groups thus suggesting a greater resistance to stress in casein groups than in soya groups.
成年猫被给予含有酪蛋白或大豆作为蛋白质来源的低糖半纯化饮食，以研究2小时固定期的影响。喂食低糖饮食的猫体重显著下降。对照酪蛋白组的血浆多巴胺-β-羟化酶活性较高，但磷酸吡哆醛-5'-磷酸水平低于对照大豆组。与各自的对照组相比，喂食低糖酪蛋白饮食的猫，血浆葡萄糖、胰岛素和磷酸吡哆醛-5'-磷酸水平升高，而喂食低糖大豆饮食的猫，磷酸吡哆醛-5'-磷酸水平降低，多巴胺-β-羟化酶活性增加。2小时固定期在所有组中均诱导了高血糖，而喂食大豆饮食的猫，血浆胰岛素水平和多巴胺-β-羟化酶活性显著增加，磷酸吡哆醛-5'-磷酸含量显著降低。这些结果表明，饮食中的酪蛋白和大豆蛋白在生理基础上可能存在差异，固定期加剧了各组之间观察到的生化紊乱，因此表明酪蛋白组比大豆组对压力具有更大的抵抗力。
