J. Anim Sci.
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J. Anim Sci. 1974. 38:178-185.
© 1974 American Society of Animal Science
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Effect of Radiation on Metabolism of Selected Minerals in Cattle1

L. B. Sasser, Leo Wade, Jr. and M.C. Bell2

UT-AEC Agricultural Research Laboratory,1, Oak Ridge,3, Tennessee 37830

Abstract

Zinc, Cu, Ca, Mg and Fe contents of plasma and/or erythrocytes of 184 kg-steers were studied following exposure of the steers to either (1) whole-body gamma irradiation, (2) beta irradiation of the gastrointestinal tract, (3) beta irradiation of the skin and (4) all combinations of the above. Gastrointestinal (GI) irradiation reduced plasma Zn concentrations 1, 2 and 3 weeks after irradiation, but no detectable change occurred in the erythrocyte concentration of stable Zn. The uptake of 65Zn by erythrocytes from control steers averaged about 5%; whereas the uptakes of the GI- and skin-irradiated steers exceeded 10%. Hypoferremia and hypercupremia accompanied the injury and infection produced by GI and skin irradiation. The decline of plasma Ca and Mg levels following GI irradiation appeared to be the result of radiation induced anorexia, as control animals with a restricted feed intake had a similar reduction in plasma Ca and Mg.

Footnotes

1 This manuscript is published with the permission of the Dean of the University of Tennessee Agricultural Experiment Station, Knoxville.

1 This manuscript is published with the permission of the Dean of the University of Tennessee Agricultural Experiment Station, Knoxville.

2 The authors acknowledge the technical assistance of G. E. Jarboe, the animal care provided by E. Vinsant, the statistical assistance of Dr. W. L. Sanders and the preparation of the 90Y-labeled sand by W. B. Lane, Stanford Research Institute.

3 Operated by the Tennessee Agricultural Experiment Station for the U. S. Atomic Energy Commission under Contract No. AT-40-1-GEN-242.






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Copyright © 1974 by the American Society of Animal Science.