PLASMA AND TISSUE CONCENTRATIONS OF ALPHA-TOCOPHEROL DURING VITAMIN-E DEPLETION IN SHEEP

被引:25
作者
FRY, JM [1 ]
SMITH, GM [1 ]
MCGRATH, MC [1 ]
SPEIJERS, EJ [1 ]
ALLEN, JG [1 ]
机构
[1] WESTERN AUSTRALIA DEPT AGR,DIV PLANT IND,S PERTH,WA 6151,AUSTRALIA
关键词
ALPHA-TOCOPHEROL; VITAMIN-E; NUTRITIONAL MYOPATHY; SHEEP;
D O I
10.1079/BJN19930024
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
To determine the relationship between plasma and tissue alpha-tocopherol concentrations during vitamin E depletion, weaned lambs were placed on a vitamin F-deficient diet for 0, 1, 2, 4, 8 and 12 weeks. Alpha-Tocopherol was measured in plasma, erythrocytes, liver, adrenal, adipose tissue, three different skeletal muscles and heart muscle. The alpha-tocopherol concentration in plasma fell at the same rate as the alpha-tocopherol concentration in skeletal muscles, heart muscle, adrenal and adipose tissue. The alpha-tocopherol concentration in liver and erythrocytes fell at a faster rate than that of plasma and all muscle tissues. There were significant correlations between alpha-tocopherol concentration in plasma and alpha-tocopherol concentrations in all the tissues measured. Different skeletal muscles had significantly different concentrations of alpha-tocopherol which may relate to their differing susceptibility to nutritional myopathy. The increase in malondialdehyde in oxidatively-stressed muscle tissue and the correlation with alpha-tocopherol concentration in most muscle tissues indicated that the muscles had reduced antioxidant capacity in vitro as a result of vitamin E depletion. It was concluded that during vitamin E depletion in sheep alpha-tocopherol concentration in plasma was a good index of vitamin E status under the experimental conditions employed.
引用
收藏
页码:225 / 232
页数:8
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