INTERRELATIONSHIPS BETWEEN ZINC AND PROTEIN LEVEL AND SOURCE IN WEANLING RATS

被引:22
作者
HARDIEMUNCY, DA [1 ]
RASMUSSEN, AI [1 ]
机构
[1] UNIV DELAWARE,COLL HUMAN RESOURCES,DEPT FOOD SCI & HUMAN NUTR,NEWARK,DE 19711
关键词
D O I
10.1093/jn/109.2.321
中图分类号
R15 [营养卫生、食品卫生]; TS201 [基础科学];
学科分类号
100403 ;
摘要
Feeding trials were conducted to compare body weight, food consumption, and serum zinc responses of weanling rats to marginal or more generous levels of zinc chloride (ZnCl2) added to diets supplying either casein (CS) or isolated soybean protein (SI) at two levels. Proteins were washed with ethylenediaminetetraacetate (EDTA) to remove inherent zinc. Diets containing 10 or 20% protein (+ DL-methionine) were supplemented with ZnCl2 to approximate concentrations of 6, 12, or 24 ppm. After 6 weeks, serum zinc values were similar in most cases for CS-6, SI-6, and SI-12 groups fed marginal levels of zinc and significantly lower than values for CS-12, CS-24, and SI-24 groups. Serum zinc correlated with dietary zinc (r2 = 0.73) but was not affected by dietary protein at the levels used. Body weights of SI-fed rats were significantly lower when either protein or zinc was limiting. To compare the response of rats to inherent or added zinc with CS or SI, proteins were washed without EDTA. After 4 weeks, rats fed SI with inherent zinc (8.2 ppm) weighed significantly less than rats fed EDTA-washed, ZnCl2-supplemented SI (7.0 ppm). The results indicate that added zinc salt was better utilized by rats than zinc inherent to SI. Also, added zinc salt, as well as inherent zinc, was less well utilized when SI rather than CS was the protein.
引用
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页码:321 / 329
页数:9
相关论文
共 30 条
[11]  
Luecke R.W., 1970, TRACE ELEMENT METABO, VLuecke, R. W.
[12]  
Ruksan, B. E.
[13]  
Baltzer, B. V., 1970: The zinc content of blood serum and bone as indices of dietary zinc adequacy in the rat. In: C. F. Mills (ed.), Trace Element Metabolism in Animals. Livingstone, Edinburgh, pp. 471- 473., P471
[14]   ABSORPTION EXCRETION AND RETENTION OF ORALLY ADMINISTERED ZINC-65 IN VARIOUS TISSUES OF ZINC-DEFICIENT AND NORMAL GOATS AND CALVES [J].
MILLER, WJ ;
BLACKMON, DM ;
GENTRY, RP ;
PITTS, WJ ;
POWELL, GW .
JOURNAL OF NUTRITION, 1967, 92 (01) :71-&
[15]  
MOMCILOVIC B, 1975, CLIN CHEM, V21, P588
[16]  
MOMCILOVIC B, 1976, J NUTR, V106, P913
[17]   EFFECT OF SOME DIETARY SYNTHETIC AND NATURAL CHELATING AGENTS ON ZINC-DEFICIENCY SYNDROME IN CHICK [J].
NIELSEN, FH ;
SUNDE, ML ;
HOEKSTRA, WG .
JOURNAL OF NUTRITION, 1966, 89 (01) :35-&
[18]   EFFECT OF DIETARY AMINO ACID SOURCE ON ZINC-DEFICIENCY SYNDROME IN CHICK [J].
NIELSEN, FH ;
SUNDE, ML ;
HOEKSTRA, WG .
JOURNAL OF NUTRITION, 1966, 89 (01) :24-&
[19]   DIETARY METAL-COMPLEXING AGENTS AND ZINC AVAILABILITY IN RAT [J].
OBERLEAS, D ;
MUHRER, ME ;
ODELL, BL .
JOURNAL OF NUTRITION, 1966, 90 (01) :56-&
[20]  
OBERLEAS D, 1969, AM J CLIN NUTR, V22, P1304