Korean J Nutr.  2003 Sep;36(7):691-698.

Effect of Vitamin E on Cadmium Accumulation and Excretion in Chronic Cadmium Poisoned Rats

Affiliations
  • 1Department of Food Science and Nutrition, Catholic University of Daegu, Gyungsan, Kyungbuk, Korea.

Abstract

The purpose of this study was to investigate the effect of vitamin E on the cadmium accumulation in body, cadmium excretion and detoxification functions in chronic cadmium poisoned rats. Sprague-Dawley male rats weighing 100+/-10 g were randomly assigned to one normal group and three cadmium poisoned groups. Cadmium poisoned groups were classified to vitamin E free diet (Cd-0E group), vitamin E 40 mg/kg diet (Cd-400E group) and 400 mg/kg diet (Cd-400E group) according to the levels of vitamin E supplement. Animals were maintained on 0, 40 mg and 400 mg vitamin E/kg diets for 20 weeks and simultaneously administered 50 ppm Cd2+ dissolved in the drinking water. Body weight, food intakes and food efficiency ratio were significantly decreased in all cadmium groups, compared with those of normal group. The accumulation of cadmium in rat liver, kidney and blood was reduced by sufficient vitamin E supplementation. The metallothionein (MT) content in liver and kidney were increased in all cadmium groups compared with that of normal group. The ratio of cadmium absorption and retention were significantly decreased in vitamin E supplementation groups. Accordingly, vitamin E supplementation resulted in an excretion of cadmium in urine and feces and a lowered accumulation of cadmium in liver and kidney. It can be suggested that increased MT synthesis lead to the significant decrease in cadmium absorption and retention rations.

Keyword

chronic cadmium poisoning; vitamin E; cadmium accumulation and excretion; metallothionein
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