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  • Title: Dose-response relationship between urinary cadmium and beta 2-microglobulin in a Japanese environmentally cadmium exposed population.
    Author: Ishizaki M, Kido T, Honda R, Tsuritani I, Yamada Y, Nakagawa H, Nogawa K.
    Journal: Toxicology; 1989 Oct 02; 58(2):121-31. PubMed ID: 2678603.
    Abstract:
    This study was carried out to test the dose-response relationship between urinary cadmium (Cd) and beta 2-microglobulin(beta 2-mg) and also to estimate the biological threshold value of urinary Cd concentration in inhabitants exposed to environmental Cd. Urinary Cd and beta 2-mg were measured in 3178 inhabitants over 50 years of age in the Cd-polluted Kakehashi River basin in Japan and 294 inhabitants in non-polluted areas. Urinary Cd and beta 2-mg were significantly higher in the Cd-exposed subjects than in the non-exposed subjects. Prevalence rates of beta 2-microglobulinuria(beta 2-mg-uria) increased proportionally with increasing urinary Cd concentrations and probit linear regression lines could be calculated between them. The urinary Cd concentration corresponding to the prevalence rates of beta 2-mg-uria among non-exposed subjects was calculated using the regression line, and values of 3.8-4.0 micrograms Cd/g creatinine for men and 3.8-4.1 micrograms Cd/g creatinine for women, respectively, were obtained. These values may be of use in establishing the biological threshold of urinary Cd concentration in environmentally Cd-exposed populations.
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