Zinc status in vitamin B6 deficiency.

Three groups of young male Wistar rats were maintained on diets consisting of 7 mg pyridoxine hydrochloride/kg diet (control and pair-fed groups) and 0 mg pyridoxine hydrochloride/kg diet (deficient group) for six weeks. The zinc status ofall rats was assessed by measuring their erythrocyte zinc-metallothionein-1 (Zn-Mt-1) and plasma zinc levels. A significant difference (p < 0.001) in plasma zinc levels was observed between the deficient group and the control and pair-fed groups (1.35 μg/ml ±0.08, 1.99 μg/ml ±0.06 and 2.03 μg/ml ±0.07 respectively). Erythrocyte Zn-Mt-1 levels were significantly lower in vitamin B 6 deficient rats when compared to control animals. No significant difference in Zn-Mt-1 levels existed between vitamin B 6 deficient and pair-fed groups suggesting that the reduced Zn-Mt-1 levels in vitamin B 6 deficient rats may be due entirely to their decreased food intake (8.9 g/day compared to 15 g/day of control rats).