Abstract
NZB mice were exposed from birth to a diet either adequate or deficient in copper. By age 6 wk the mice exposed to the copper-deficient diet showed symptoms characteristic of copper deficiency (anemia, hypoceruloplasminemia, and achromatrichia). The splenic lymphocytes from the copper-deficient group had reduced numbers of cells expressing the following surface markers: Ly-5, Ly-1, B-220, and sIg. Less than 10% of the splenic lymphocytes in this group were cycling, as determined by flow cytometry analysis. The spontaneous 96-h anti-ss-DNA levels in the copper-deficient group were lower than those in the control group. The exogenous colony-forming units (CFUs) were significantly enhanced in the copper-deficient mice. The decreased splenic lymphoid populations, decreased anti-ss-DNA titers, and increased exogenous CFUs in the copper-deficient mice appear to be due to an increase in erythropoiesis at the expense of lymphopoiesis.
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