Critical concentrations of cadmium in human renal cortex: dose-effect studies in cadmium smelter workers

Journal of Toxicology and Environmental Health
K J EllisS H Cohn

Abstract

Cadmium was measured in vivo in the left kidney and liver of 82 industrially exposed workers and 10 control subjects. The range of Cd values for the industrial group was 0.9-57 mg for the whole kidney and 0.8-120 ppm for the liver, compared to 0.4-11.8 mg and 0.6-7.9 ppm for the control group. Below 40 ppm in the liver, the kidney Cd burden tended to increase with increasing liver concentration. Above 40 ppm, the kidney Cd content decreased as the liver concentration increased. This biphasic relation between Cd in the kidney and the liver for all subjects showed a critical level of approximately 31 mg Cd in the kidney. Estimates of the critical level by beta 2-microglobulin and urinary protein measurements yielded critical values of 31-42 mg Cd for the whole kidney (300-400 microgram/g for the renal cortex).

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