Abstract
The 3-hydroxypyridinium crosslinks of collagen were quantified in tissues of the skeleton and cardiovascular system of normal and copper-deficient rats. The copper-deficient rats used in this study displayed retarded growth, cardiac hypertrophy, anemia, and lowered liver copper concentrations. Quantification of the crosslinks by high performance liquid chromatography indicated that there were lower concentrations of collagen crosslinks in the hearts of copper-deficient animals, a finding that was manifest in both right and left ventricles. This was in contrast to the collagen of the aorta where no alteration in crosslink concentration was observed. The femoral diaphysis of copper-deficient rats also had lower amounts of collagen crosslinks than copper-supplemented animals, whereas crosslinking in the tibial diaphysis and articular cartilage was relatively unaffected by copper deficiency. These results are discussed with reference to the cardiac and skeletal abnormalities that occur in copper-deficient animals.
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