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Distribution of Calcium in the Rat due to Chronic Renal Failure
K.J. Ellis , A. Martino , S. Yasumura , D. Brook , S.H. Cohn , J.M. Letteri
28 November 2008
Total body calcium, Skeletal Ca, Muscle Ca, Skin Ca, Cardiac Ca, Metastatic calcification, Uremia, Neutron activation analysis
Abstract
During the 12 weeks following 5/6 nephrectomy in rats with moderate uremia (creatinine 0.7–1.2 mg/100 ml, BUN 53–89 mg/100 ml), no significant increases in total soft tissue calcification were observed. The calcium concentration of skeletal muscle remained unchanged at 4, 8, and 12 weeks after surgery. A slight but not significant increase in skin calcium was found. However, a significant decrease in cardiac calcium was found for the uremic animals. Total body calcium as determined by neutron activation analysis was significantly lower in the uremic rat when compared with the age-matched animal. However, when normalized for body weight, the total calcium content in uremic rats did not differ from the controls. Similar findings were observed for the absolute calcium content of the tibia and when normalized for weight. Furthermore, a highly significant linear relationship (r = 0.92, p < < 0.001) was established between absolute levels of total body calcium and tibia calcium which was identical for the control and uremic groups.
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