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  • Title: Relationship of cadmium accumulation to zinc or copper concentration in horse liver and kidney.
    Author: Koizumi N, Inoue Y, Ninomiya R, Fujita D, Tsukamoto T.
    Journal: Environ Res; 1989 Jun; 49(1):104-14. PubMed ID: 2721471.
    Abstract:
    The concentrations of Cd, Zn, Cu, and metallothionein (MT) in the liver, renal cortex, and renal medulla were determined in 24 male and 15 female younger thoroughbreds (age 27 to 97 months) and two old male horses (age 154 months and 190 months). High correlations were found between Zn and MT in the liver (partial correlation coefficient 0.836), between Cd and MT in the renal cortex (partial correlation coefficient 0.786), and between Cd and Zn in the renal cortex (partial correlation coefficient 0.675), while the correlation between Cd and MT in the liver was low (partial correlation coefficient 0.124). In the renal medulla, high correlations were found between Cd and Zn (partial correlation coefficient -0.631), between Zn and Cu (partial correlation coefficient 0.881), and between Cd and Cu (partial correlation coefficient 0.785). Therefore, in the liver, the MT concentration is the most highly correlated with the Zn concentration and is not correlated with the CD concentration unless artificially exposed to Cd. In the renal cortex, the MT and Cd concentrations are very highly correlated with each other. The Zn concentration is about 20 micrograms/g when the Cd concentration in the renal cortex is the lowest.
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