The relationship between radiosensitivity and repair of potentially lethal damage in human tumor cell lines with implications for radioresponsiveness

Journal Article · Sun Apr 01 04:00:00 EDT 1990 · Radiation Research; (USA)

DOI:https://doi.org/10.2307/3577579· OSTI ID:6973917

Deschavanne, P J; Fertil, B; Chavaudra, N; Malaise, E P ^[1]

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1. Universite Paris VII (France)

The relationship between intrinsic radiosensitivity and repair capacity was studied for 22 human tumor cell lines in vitro. The experimental material was taken from 19 published papers. Parameters from three radiobiological models were used to assess this relationship: the one-hit multitarget model (D0 and n), the linear-quadratic model (alpha and beta), and the mean inactivation dose (D). Data were obtained for cells in three stages: exponentially growing cells (exp), plateau-phase cells plated immediately after irradiation (ip), and plateau-phase cells plated after completion of PLD repair (dp). No significant difference was found between radiosensitivity of exp and ip cells. There was no correlation between repair capacity and intrinsic radiosensitivity assessed with plateau-phase cells plated immediately after irradiation. The correlation studies between intrinsic radiosensitivity or repair capacity and clinical responsiveness were achieved by assigning cell lines to one of three groups of decreasing in vivo radioresponsiveness: highly, medium, and poorly responsive. There was a significant correlation between radiosensitivity and radioresponsiveness, but no correlation between repair capacity and radioresponsiveness. The average repair capacity was about 0.6 Gy, in terms of D. Three parameters, the mean inactivation dose of exponentially growing cells, of plateau-phase cells plated immediately after irradiation, and of plateau-phase cells plated after completion of PLD repair, could be used equally to assess the relationship between in vitro data and radioresponsiveness. The present results are compared to those obtained in a similar study on a group of 48 nontransformed fibroblast cell strains.

• OSTI ID: 6973917
• Journal Information: Radiation Research; (USA), Journal Name: Radiation Research; (USA) Vol. 122:1; ISSN RAREA; ISSN 0033-7587
• Country of Publication: United States
• Language: English

Related Subjects

560120* -- Radiation Effects on Biochemicals
Cells
& Tissue Culture
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMAL CELLS
ANIMALS
BIOLOGICAL RECOVERY
BIOLOGICAL REPAIR
COMPARATIVE EVALUATIONS
CONNECTIVE TISSUE CELLS
DNA REPAIR
DOSES
FIBROBLASTS
MAMMALS
MAN
PRIMATES
RADIATION DOSES
RADIOSENSITIVITY
RECOVERY
REPAIR
SOMATIC CELLS
SURVIVAL TIME
TUMOR CELLS
VERTEBRATES