title: Toward computer simulation of high-LET in vitro survival curves.
abstract: We developed a Monte Carlo based computer program called MCSC (Monte Carlo Survival Curve) able to predict the survival fraction of cells irradiated in vitro with a broad beam of high linear energy transfer particles. Three types of cell responses are studied: the usual high dose response, the bystander effect and the low-dose hypersensitivity (HRS). The program models the broad beam irradiation and double strand break distribution following Poisson statistics. The progression of cells through the cell cycle is taken into account while the repair takes place. Input parameters are experimentally determined for A549 lung carcinoma cells irradiated with 10 and 20 keV µm(-1) protons, 115 keV µm(-1) alpha particles and for EAhy926 endothelial cells exposed to 115 keV µm(-1) alpha particles. Results of simulations are presented and compared with experimental survival curves obtained for A549 and EAhy296 cells. Results are in good agreement with experimental data for both cell lines and all irradiation protocols. The benefits of MCSC are several: the gain of time that would have been spent performing time-consuming clonogenic assays, the capacity to estimate survival fraction of cell lines not forming colonies and possibly the evaluation of radiosensitivity parameters of given individuals.
authors.affiliation: NAmur Research Institute for LIfe Sciences (NARILIS), Research Center for the physics of Matter and Radiation (PMR), University of Namur, 61, rue de Bruxelles, 5000 Namur, Belgium.
authors.forename: A-C
authors.initials: AC
authors.lastname: Heuskin
authors.forename: C
authors.initials: C
authors.lastname: Michiels
authors.forename: S
authors.initials: S
authors.lastname: Lucas
mesh_terms: D000465:Algorithms; D000512:Alpha Particles; D002460:Cell Line; D045744:Cell Line, Tumor; D003198:Computer Simulation; D004249:DNA Damage; D004260:DNA Repair; D004307:Dose-Response Relationship, Radiation; D006657:Histones / Q000737:chemistry; D006801:Humans; D018499:Linear Energy Transfer; D008175:Lung Neoplasms / Q000532:radiotherapy*; D009010:Monte Carlo Method; D016012:Poisson Distribution; D011522:Protons; D011836:Radiation Tolerance; D013997:Time Factors
chemical_list: C468783:H2AX protein, human; D006657:Histones; D011522:Protons