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Protection by interleukin 1 against lung toxicity caused by cyclophosphamide and irradiation
M J Dorie1, G Bedarida, R F Kallman
1Department of Radiation Oncology, Stanford University Medical Center, California 94305.
Abstract:
Interleukin 1 has been shown to provide protection against the toxic effects of cyclophosphamide given in combination with localized irradiation of the lung. A single dose of 15 micrograms/kg interleukin 1 was given 24 h before cyclophosphamide (25-125 mg/kg) which was followed 1 day later by five daily exposures of 4.5 or 5.0 Gy, localized to the lung. Interleukin 1 significantly reduced early measurements of breathing rate for mice treated with high cyclophosphamide doses and irradiation, and at cyclophosphamide doses above 50 mg/kg, there was a significant reduction in the lethality from the combined treatment. At lower levels of cyclophosphamide, however, there seemed to be no effect.
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