Reference: Komarova LN, et al. (2002) [Recovery of yeast cells after exposure to ionizing radiation and hyperthermia]. Radiats Biol Radioecol 42(1):54-9

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Abstract


Quantitative regularities of recovery of wild-type diploid yeast cells irradiated with gamma-rays (60Co) simultaneously with exposure to high temperatures were studied. It was shown that in conditions of such a combined action the constant of recovery did not depend on the temperature at which the irradiation was carried out. However, with an increase of acting temperature an augmentation in the portion of irreversible component was registered. The analysis of cell inactivation revealed that the augmentation of the irreversible component was accompanied by a continuous increase of cell killing without any postirradiation division after which cells are incapable of recovery. The reproductive death was mainly exerted after ionizing radiation applied alone while in conditions of simultaneous thermoradiation action the interphase killing (cell death without division) predominated. It is concluded on this base that the mechanism of synergistic interaction of ionizing radiation and hyperthermia may be related with cardinal change in mechanisms of cell killing.

Reference Type
Comparative Study | English Abstract | Journal Article
Authors
Komarova LN, Petin VG, Tkhabisimova MD
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