PMID- 8521048 OWN - NLM STAT- MEDLINE DCOM- 19960125 LR - 20191023 IS - 0266-7061 (Print) IS - 0266-7061 (Linking) VI - 11 IP - 4 DP - 1995 Aug TI - Chromosome aberrations produced by ionizing radiation: Monte Carlo simulations and chromosome painting data. PG - 389-97 AB - Monte Carlo simulations are used to analyze the reshuffling of chromosome segments which occurs when DNA is damaged by ionizing radiation. Programs are based on either Sax's classic breakage-and-reunion model or Revell's exchange model for chromosome aberrations. The simulations quantify the predictions of the two models in complete detail, using only one adjustable parameter which corresponds to total radiation dose. While testing subroutines, new analytic results on the chromosome/arm/break method of classifying aberrations were obtained. The model predictions were tested by using three-color fluorescence in situ hybridization (FISH) 'chromosome painting' on human lymphocyte cells irradiated with gamma-rays. Some of the per-cell aberration frequencies were observed to be intermediate between the predictions of the two models. This result indicates proximity 'effects', due to localization of chromosome interactions in space and time. Predictions based on chromosome arm lengths were found to be in good agreement with experiment. Monte Carlo simulations are a powerful, flexible way to compare models of chromosome aberration production with experiments quantitatively, using a minimum of theoretical presumptions. FAU - Chen, A M AU - Chen AM AD - Lawrence Livermore National Laboratory, Livermore, CA 94551, USA. FAU - Lucas, J N AU - Lucas JN FAU - Hill, F S AU - Hill FS FAU - Brenner, D J AU - Brenner DJ FAU - Sachs, R K AU - Sachs RK LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, U.S. Gov't, Non-P.H.S. PL - England TA - Comput Appl Biosci JT - Computer applications in the biosciences : CABIOS JID - 8511758 SB - IM MH - Algorithms MH - *Chromosome Aberrations MH - Chromosomes, Human/*radiation effects/ultrastructure MH - *Computer Simulation MH - DNA Damage MH - Humans MH - In Situ Hybridization, Fluorescence MH - *Models, Genetic MH - *Monte Carlo Method MH - Software EDAT- 1995/08/01 00:00 MHDA- 1995/08/01 00:01 CRDT- 1995/08/01 00:00 PHST- 1995/08/01 00:00 [pubmed] PHST- 1995/08/01 00:01 [medline] PHST- 1995/08/01 00:00 [entrez] AID - 10.1093/bioinformatics/11.4.389 [doi] PST - ppublish SO - Comput Appl Biosci. 1995 Aug;11(4):389-97. doi: 10.1093/bioinformatics/11.4.389.