A comprehensive stochastic model of irradiated cell populations in culture.
A comprehensive entirely mechanistic model of the kinetics of cell population in vitro exposed to continuous irradiation is formulated and analysed. The model provides a stochastic description of the processes of formation and repair of radiation-induced lesions, as well as of cell cycling, cell proliferation, and cell death. Unobservable kinetic parameters of the model are estimated from experimental data on the sizes of clones formed in synchronized cultures of S3 HeLa cells exposed to continuous irradiation by gamma-rays at various dose rates. The effects of dose rate on cell cycle duration and damage repair kinetics are studied. Continuous and acute exposures with the same total dose are compared in terms of their impact on cell survival.
Hanin
Leonid
L
Department of Biostatistics and Computational Biology, University of Rochester, 601 Elmwood Avenue, Box 630, NY 14642, USA. hanin@isu.edu
Hyrien
Ollivier
O
Bedford
Joel
J
Yakovlev
Andrei
A
D002453:Cell Cycle / Q000528:radiation effects; D002455:Cell Division / Q000528:radiation effects; D002470:Cell Survival; D002477:Cells / Q000528:radiation effects*; D002999:Clone Cells; D003198:Computer Simulation; D004260:DNA Repair; D004307:Dose-Response Relationship, Radiation; D005720:Gamma Rays / Q000009:adverse effects*; D006367:HeLa Cells; D006801:Humans; D008954:Models, Biological; D015233:Models, Statistical; D016296:Mutagenesis; D009381:Neoplasms, Radiation-Induced