The Journal of General Physiology
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The Journal of General Physiology, Vol 35, 865-871, Copyright © 1952 by The Rockefeller University Press

ARTICLE

STUDIES ON THE MECHANISM OF ACTION OF IONIZING RADIATIONS

VII. CELLULAR RESPIRATION, CELL DIVISION, AND IONIZING RADIATIONS



E. S. Guzman Barron 1 and S. Louise Seki 1

1 From the Division of Biological and Medical Research, Argonne National Laboratory, The Chemical Division, Department of Medicine, University of Chicago, Chicago, and the Marine Biological Laboratory, Woods Hole

On x-irradiation of the eggs and sperm of Arbacia punctulata there was inhibition of respiration with relatively large doses, whereas there was an increase with small doses. The dose required to produce an increase of respiration depended on the degree of sensitivity of the cell to the effect of ionizing radiation. Sperm cells were more sensitive; then came fertilized eggs; unfertilized eggs were the least sensitive. The inhibiting effect of x-rays on cell division was observed even on irradiation with x-ray doses which produced an increase of respiration. These results are compared to similar effects produced by thiol reagents and are attributed to oxidation of the thiol compounds in the cell.

Submitted on January 11, 1952


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O. A. Schjeide, J. F. Mead, and L. S. Myers Jr.
Notions on Sensitivity of Cells to Radiation
Science, June 8, 1956; 123(3206): 1020 - 1022.
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