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FROM RADIATION-INDUCED CHROMOSOME DAMAGE TO CELL DEATH: MODELLING BASIC MECHANISMS AND APPLICATIONS TO BORON NEUTRON CAPTURE THERAPY.
MedLine Citation:
PMID:  21159746     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Cell death is a crucial endpoint in radiation-induced biological damage: on one side, cell death is a reference endpoint to characterise the action of radiation in biological targets; on the other side, any cancer therapy aims to kill tumour cells. Starting from Lea's target theory, many models have been proposed to interpret radiation-induced cell killing; after briefly discussing some of these models, in this paper, a mechanistic approach based on an experimentally observed link between chromosome aberrations and cell death was presented. More specifically, a model and a Monte Carlo code originally developed for chromosome aberrations were extended to simulate radiation-induced cell death applying an experimentally observed one-to-one relationship between the average number of 'lethal aberrations' (dicentrics, rings and deletions) per cell and -ln S, S being the fraction of surviving cells. Although such observation was related to X rays, in the present work, the approach was also applied to protons and alpha particles. A good agreement between simulation outcomes and literature data provided a model validation for different radiation types. The same approach was then successfully applied to simulate the survival of cells enriched with boron and irradiated with thermal neutrons at the Triga Mark II reactor in Pavia, to mimic a typical treatment for boron neutron capture therapy.
Authors:
F Ballarini; S Bortolussi; A M Clerici; C Ferrari; N Protti; S Altieri
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2010-12-15
Journal Detail:
Title:  Radiation protection dosimetry     Volume:  -     ISSN:  1742-3406     ISO Abbreviation:  -     Publication Date:  2010 Dec 
Date Detail:
Created Date:  2010-12-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8109958     Medline TA:  Radiat Prot Dosimetry     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Department of Nuclear and Theoretical Physics, University of Pavia, INFN-Pavia, via Bassi 6, I-27100 Pavia, Italy.
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