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  • Title: Dietary exposure to cadmium at close to the current provisional tolerable weekly intake does not affect renal function among female Japanese farmers.
    Author: Horiguchi H, Oguma E, Sasaki S, Miyamoto K, Ikeda Y, Machida M, Kayama F.
    Journal: Environ Res; 2004 May; 95(1):20-31. PubMed ID: 15068927.
    Abstract:
    Dietary cadmium (Cd) exposure and renal tubular function were investigated in 1381 female farmers from five districts in Japan (Japanese Multi-centered Environmental Toxicant Study project; JMETS). Dietary Cd exposure of the five populations was assessed from the individual Cd concentrations of the rice consumed by the study participants and the quantities of rice consumed daily. The populations showed a sequential difference in dietary Cd exposure, ranging from a level as low as that of the general Japanese population to one close to the current provisional tolerable weekly intake (PTWI). The levels of urinary Cd excretion, an indicator of Cd accumulation in the kidneys, increased along the same sequential pattern as dietary Cd exposure. However, no differences were observed among the populations in levels of urinary alpha 1-microglobulin and beta 2-microglobulin excretion, which are indicators of renal tubular function. These results indicate that the current PTWI is sufficient to prevent Cd-induced renal dysfunction among the general population.
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