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Radiology, Vol 123, 767-770, Copyright © 1977 by Radiological Society of North America
ARTICLES |
JA Power and JW Harris
Chinese hamster V79 cells and mouse EMT6 cells were made extremely hypoxic with a chamber technique that relies upon gas exchange rather than respiration-assisted oxygen depletion. Cells in these chambers were treated with heat (43degrees C) or heat plus x-irradiation, and colony-forming ability was determined. Hyperthermia: (a) kills exponentially growing V79 cells more efficiently than plateau-phase cells; (b) kills euoxic and extremely hypoxic cells equally; and (c) radiosensitizes euoxic and extremely hypoxic cells to the same degree, leaving the oxygen enhancement ratio unchanged.
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