Kazarov AR, Malatsidze MA, Sobolev AS. Selective protection of cells against X-irradiation. Isoproterenol protects only those cells that possess beta-adrenoreceptors.
EXPERIENTIA 1985;
41:1430-2. [PMID:
2998862 DOI:
10.1007/bf01950019]
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Abstract
In mixed culture of Chinese hamster fibroblasts, clone 431, and transformed murine L fibroblasts, clone B-82, isoproterenol was found to protect only 431 cells against ionizing radiation. It was shown that 431 cells, in contrast to B-82 cells, possess beta-adrenoreceptors, and the radioprotective effect of isoproterenol can be realized only if this agent interacts with beta-adrenoreceptors coupled with the cAMP system. Since malignization often causes the disappearance of beta-adrenergic and other hormone receptors, the combined culturing and irradiation of the cells studied can be regarded as a model of the growth of malignant cells (B-82) among normal tissue cells (431 cells) under conditions of radiation therapy. A possibility of selective protection against radiation damage of normal tissue cells, with retention of the former radiosensitivity of tumor cells, is discussed.
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