title: Flow cytometric determination of radiation-induced chromosome damage and its correlation with cell survival.
abstract: Chinese hamster M3-1 cells were irradiated with several doses of X rays or alpha particles from 238Pu. Propidium iodide-stained chromosome suspensions were prepared at different times after irradiation; cells were also assayed for survival. The DNA histograms of these chromosomes showed increased background counts with increased doses of radiation. This increase in background was cell-cycle dependent and was correlated with cell survival. The correlation between radiation-induced chromosome damage and cell survival was the same for X rays and alpha particles. Data are presented which indicate that flow cytometric analysis of chromosomes of irradiated cell populations can be a useful adjunct to classical cytogenic analysis of irradiation-induced chromosomal damage by virtue of its ability to express and measure chromosomal damage not seen by classical cytogenic methods.
mesh_terms: D000512:Alpha Particles; D000818:Animals; D002453:Cell Cycle; D002460:Cell Line; D002470:Cell Survival / Q000528:radiation effects*; D002869:Chromosome Aberrations; D006224:Cricetinae; D003412:Cricetulus; D004307:Dose-Response Relationship, Radiation; D004735:Energy Transfer; D005434:Flow Cytometry; D011005:Plutonium; D011831:Radiation Genetics; D013997:Time Factors
chemical_list: D011005:Plutonium