Eklund A, Agren G
Nutr Metab. 1978;22(4):218-30. doi: 10.1159/000176218.
In order to study the effects of a dietary rapeseed protein concentrate (RPC) on tocopherol and zinc levels in serum, liver and tibia, female rats were fed a tocopherol-reduced diet for a 3-week period and were then transferred to either of a RPC diet or a control diet containing casein at 20% levels of protein. No unfavourable effects on food intakes or weight gains were recorded. The serum zinc content of the RPC group was slightly reduced and the serum tocopherol values significantly lowered in comparison to the control group. Zinc and tocopherol contents of the livers were not changed. Precipitation of sera by dextran sulphate in the presence of calcium ions indicated a reduced level of low density lipoproteins in rats fed RPC diet. In a second experiment, male and female rats were fed diets containing 10% of protein derived either from RPC or casein. Low zinc contents of tibiae indicated a low biological availability of the zinc present in the RPC diet. Rats on RPC diet also showed reduced levels of tocopherol in serum. Despite a lowered zinc status in rats fed RPC diet there was no reduction in food intake, weight gain or growth of tibia in these groups.
为了研究膳食油菜籽浓缩蛋白（RPC）对血清、肝脏和胫骨中生育酚和锌水平的影响，将雌性大鼠喂食低生育酚饮食3周，然后转移至含20%蛋白质水平的RPC饮食或含酪蛋白的对照饮食中。未记录到对食物摄入量或体重增加的不利影响。与对照组相比，RPC组的血清锌含量略有降低，血清生育酚值显著降低。肝脏中的锌和生育酚含量没有变化。在钙离子存在下用硫酸葡聚糖沉淀血清表明，喂食RPC饮食的大鼠中低密度脂蛋白水平降低。在第二个实验中，给雄性和雌性大鼠喂食含10%来自RPC或酪蛋白的蛋白质的饮食。胫骨中锌含量低表明RPC饮食中锌的生物利用率低。喂食RPC饮食的大鼠血清中生育酚水平也降低。尽管喂食RPC饮食的大鼠锌状态降低，但这些组的食物摄入量、体重增加或胫骨生长均未减少。
