The Journal of Heredity 1983:74(3):141-144
© 1983 The American Genetic Association 74:141-144
research-article |
Toxic milk, a new mutation affecting copper metabolism in the mouse
Department of Zoology, University of Massachusetts Amherst, MA 01003
Abstract
Toxic milk, tx, a new autosomal recessive mutation in mice is described. Litters produced by mutant females display a syndrome including poor growth, hypopigmentatlon, tremors, and ultimately death at two weeks of age. These features, consistent with copper deficiency, are attributed to failure in gestational hepatic copper accumulation exacerbated by subsistence on milk with greatly reduced copper content. Such infants can be rescued by foster-nursing on normal dams or by administration of supplemental copper. Mutants themselves amass extraordinarily large concentrations of hepatic copper that ultimately leads to liver disease. Erroneous hepatic copper metabolism is further evidenced by reduced ceruloplasmin activity.
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