Summary
Serum concentrations of 25-hydroxyvitamin D [25(OH)D], 24,25-dihydroxyvitamin D [24,25(OH)2D], and 1α,25-dihydroxyvitamin D [1α,25(OH)2D] were measured in ten cadmium (Cd)-exposed subjects and five non exposed subjects. The Cd-exposed subjects were divided into two groups according to serum 1α,25(OH)2D levels. No significant differences for 25(OH)D were found between the Cd-exposed group with low or normal serum 1α,25(OH)2D and the non exposed group. The concentrations of 24,25(OH)2D were the lowest in the Cd-exposed group with low serum 1α,25(OH)2D, highest in the non exposed group, and significantly lower in the Cd-exposed group with normal serum 1α,25(OH)2D than in the non exposed group. Renal function was much worse in the Cd-exposed group with low serum 1α,25(OH)2D than in the group with normal serum 1α,25(OH)2D. These findings indicate that Cd initially disturbs hydroxylation from 25(OH)D to 24,25(OH)2D and then disturbs hydroxylation from 25(OH)D to 1α,25(OH)2D. The decrease of serum 24,25(OH)2D and 1α,25(OH)2D in Cd-exposed subjects is not due to a decrease of the serum 25(OH)D level.
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Nogawa, K., Tsuritani, I., Kido, T. et al. Serum vitamin D metabolites in cadmium-exposed persons with renal damage. Int. Arch Occup Environ Heath 62, 189–193 (1990). https://doi.org/10.1007/BF00379430
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DOI: https://doi.org/10.1007/BF00379430