English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/3468
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:

Title

Early and late skin reactions to radiotherapy for breast cancer and their correlation with radiation-induced DNA damage in lymphocytes

AuthorsLópez, Escarlata; Guerrero, Rosario; Núñez, Maria Isabel; Moral, Rosario del; Villalobos, Mercedes; Martínez-Galán, Joaquina; Valenzuela, María Teresa; Muñoz-Gámez, José A.; Oliver, Francisco Javier; Martín-Oliva, David; Ruiz de Almodóvar, José Mariano
Issue Date1-Jul-2005
PublisherBioMed Central
CitationBreast Cancer Research 2005, 7:R690-R698
Abstract[Introduction] Radiotherapy outcomes might be further improved by a greater understanding of the individual variations in normal tissue reactions that determine tolerance. Most published studies on radiation toxicity have been performed retrospectively. Our prospective study was launched in 1996 to measure the in vitro radiosensitivity of peripheral blood lymphocytes before treatment with radical radiotherapy in patients with breast cancer, and to assess the early and the late radiation skin side effects in the same group of patients. We prospectively recruited consecutive breast cancer patients receiving radiation therapy after breast surgery. To evaluate whether early and late side effects of radiotherapy can be predicted by the assay, a study was conducted of the association between the results of in vitro radiosensitivity tests and acute and late adverse radiation effects.
[Methods] Intrinsic molecular radiosensitivity was measured by using an initial radiation-induced DNA damage assay on lymphocytes obtained from breast cancer patients before radiotherapy. Acute reactions were assessed in 108 of these patients on the last treatment day. Late morbidity was assessed after 7 years of follow-up in some of these patients. The Radiation Therapy Oncology Group (RTOG) morbidity score system was used for both assessments.
[Results] Radiosensitivity values obtained using the in vitro test showed no relation with the acute or late adverse skin reactions observed. There was no evidence of a relation between acute and late normal tissue reactions assessed in the same patients. A positive relation was found between the treatment volume and both early and late side effects.
[Conclusion] After radiation treatment, a number of cells containing major changes can have a long survival and disappear very slowly, becoming a chronic focus of immunological system stimulation. This stimulation can produce, in a stochastic manner, late radiation-related adverse effects of varying severity. Further research is warranted to identify the major determinants of normal tissue radiation response to make it possible to individualize treatments and improve the outcome of radiotherapy in cancer patients.
DescriptionThis article is online at: http://breast-cancer-research.com/content/7/5/R690
URIhttp://hdl.handle.net/10261/3468
DOIhttp://dx.doi.org/10.1186/bcr1277
ISSN1465-542X
Appears in Collections:(IPBLN) Artículos
Files in This Item:
File Description SizeFormat 
bcr1277.pdf318,88 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.