Abstract
Differences in the Cd-induced levels of liver metallothionein in inbred mouse strains are described. All strains examined show substantial increases in metallothionein production after the administration of 25 µmol CdCl2/kg, but the maximal levels achieved after 48 hr differed such that CBA/Ca>DBA/2>C57BL/10=C3H/He>BALB/c. These differences were generally not paralleled by differences in the amount of Cd2+ bound to metallothionein or in the total tissue content of Cd2+. Incorporation of [35S] cysteine into metallothionein suggests that differential synthesis affecting both isoproteins (MT1 and MT2) equally is largely responsible for the strain difference between C57BL/10 and DBA/2, and interstrain crosses between these two strains reveal codominant inheritance of Cd2+-induced metallothionein level and indicate that a single gene, either linked or identical to the cdm gene on chromosome 3, is involved.
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Hunt, D.M., Mhlanga, T. Genetic studies on metallothionein synthesis in the mouse: The induction of metallothionein by cadmium in inbred strains. Biochem Genet 21, 609–625 (1983). https://doi.org/10.1007/BF00484450
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DOI: https://doi.org/10.1007/BF00484450