Current status of biodosimetry based on standard cytogenetic methods
| Autor: | Neyliane Frassinetti Gonçalves Santos, Marcela Maria Pereira de Lemos Pinto, Ademir Amaral |
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| Rok vydání: | 2009 |
| Předmět: |
medicine.medical_specialty
Biophysics Mitosis Context (language use) Chromosomes Ionizing radiation Cytogenetics Biodosimetry Radiation Monitoring Radiation Ionizing Medicine Dosimetry Animals Humans Medical physics Lymphocytes Radiometry In Situ Hybridization Fluorescence General Environmental Science Chromosome Aberrations Radiation Micronucleus Tests business.industry Dose-Response Relationship Radiation Gold standard (test) Acute Radiation Syndrome Absorbed dose Micronucleus test Radiation protection business Biomarkers Environmental Monitoring |
| Zdroj: | Radiation and environmental biophysics. 49(4) |
| ISSN: | 1432-2099 |
| Popis: | Knowledge about dose levels in radiation protection is an important step for risk assessment. However, in most cases of real or suspected accidental exposures to ionizing radiation (IR), physical dosimetry cannot be performed for retrospective estimates. In such situations, biological dosimetry has been proposed as an alternative for investigation. Briefly, biodosimetry can be defined as individual dose evaluation based on biological endpoints induced by IR (so-called biomarkers). The relationship between biological endpoints and absorbed dose is not always straightforward: nausea, vomiting and diarrhoea, for example, are the most well-known biological effects of individual irradiation, but a precise correlation between those symptoms and absorbed dose is hardly achieved. The scoring of unstable chromosomal-type aberrations (such as dicentrics and rings) and micronuclei in mitogen-stimulated peripheral blood, up till today, has been the most extensively biodosimetry assay employed for such purposes. Dicentric assay is the gold standard in biodosimetry, since its presence is generally considered to be specific to radiation exposure; scoring of micronuclei (a kind of by-product of chromosomal damages) is easier and faster than that of dicentrics for dose assessment. In this context, the aim of this work is to present an overview on biodosimetry based on standard cytogenetic methods, highlighting its advantages and limitations as tool in monitoring of radiation workers’ doses or investigation into accidental exposures. Recent advances and perspectives are also briefly presented. |
| Databáze: | OpenAIRE |
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