Stimulation of the fibroblasts growth in culture by low doses of ionizing radiation

The effect of low irradiation doses (10-100 cGy) on the growth of Chinese hamster fibroblasts was examined. It was shown that the number and the mean size of colonies increased after irradiation with doses of 10-40 cGy. Dependence of the effect on dose is extermal with maximum at 10-20 cGy. Irradiation by dose of 10 cGy did not affect on the cell duration but significantly shortened the las-phase of growth