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Human Genotoxic Study Carried Out Two Years after Oil Exposure during the Clean-up Activities Using Two Different Biomarkers
Biern, Gloria (Universitat Autònoma de Barcelona. Departament de Biologia Cel·lular, de Fisiologia i d'Immunologia)
Giraldo, Jesús (Universitat Autònoma de Barcelona. Institut de Neurociències)
Zock, Jan-Paul (Centre de Recerca en Epidemiologia Ambiental)
Monyarch Gros, Gemma (Universitat Autònoma de Barcelona. Departament de Biologia Cel·lular, de Fisiologia i d'Immunologia)
Espinosa, Ana (Centre de Recerca en Epidemiologia Ambiental)
Rodriguez-Trigo, Gema (Hospital Clínico de San Carlos (Madrid))
Gómez, Federico (Centro de Investigaciones Biomédicas en Red)
Pozo Rodriguez, Francisco (Centro de Investigaciones Biomédicas en Red)
Barberà i Mir, Joan Albert (Centro de Investigaciones Biomédicas en Red)
Fuster i Marquès, Carme (Universitat Autònoma de Barcelona. Departament de Biologia Cel·lular, de Fisiologia i d'Immunologia)

Data: 2015
Resum: Micronuclei, comet and chromosome alterations assays are the most widely used biomarkers for determining the genotoxic damage in a population exposed to genotoxic chemicals. While chromosome alterations are an excellent biomarker to detect short- and long-term genotoxic effects, the comet assay only measures early biological effects, and furthermore it is unknown whether nuclear abnormalies, such as those measured in the micronucleus test, remain detectable long-term after an acute exposure. In our previous study, an increase in structural chromosome alterations in fishermen involved in the clean-up of the Prestige oil spill, two years after acute exposure, was detected. The aim of this study is to investigate whether, in lymphocytes from peripheral blood, the nuclear abnormalies (micronucleus, nucleoplasmic bridges and nuclear buds) have a similar sensitivity to the chromosome damage analysis for genotoxic detection two years after oil exposure in the same non-smoker individuals and in the same peripheral blood extraction. No significant differences in nuclear abnormalies frequencies between exposed and non-exposed individuals were found (p > 0. 05). However, chromosome damage, in the same individuals, was higher in exposed vs. non-exposed individuals, especially for chromosome lesions (p < 0. 05). These findings, despite the small sample size, suggest that nuclear abnormalities are probably less-successful biomarkers than are chromosome alterations to evaluate genotoxic effects two or more years after an exposure to oil. Due to the great advantage of micronucleus automatic determination, which allows for a rapid study of hundreds of individuals exposed to genotoxic chemical exposure, further studies are needed to confirm whether this assay is or is not useful in long-term genotoxic studies after the toxic agent is no longer present.
Drets: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. Creative Commons
Llengua: Anglès
Document: article ; recerca ; publishedVersion
Matèria: Micronucleus test ; Chromosome damage ; Nuclear abnormities ; Chromosome alterations ; Oil exposure ; Genotoxicity ; Prestige catastrophe
Publicat a: Journal of Marine Science and Engineering, Vol. 3 (2015) , p. 1334-1348, ISSN 2077-1312

DOI: 10.3390/jmse3041334

15 p, 1.2 MB

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