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Type: Journal article
Title: Inhalative exposure to vanadium pentoxide causes DNA damage in workers: Results of a multiple end point study
Author: Fenech, M.
Citation: Environmental Health Perspectives, 2009; 116(12):1689-1693
Publisher: U.S. Dept of Health and Human Services Public Health Science
Issue Date: 2009
ISSN: 0091-6765
Statement of
Veronika A. Ehrlich, Armen K. Nersesyan, Kambis Atefie, Christine Hoelzl, Franziska Ferk, Julia Bichler, Eva Valic, Andreas Schaffer, Rolf Schulte‑Hermann, Michael Fenech, Karl‑Heinz Wagner and Siegfried Knasmüller
Abstract: <h4>Background</h4>Inhalative exposure to vanadium pentoxide (V(2)O(5)) causes lung cancer in rodents.<h4>Objective</h4>The aim of the study was to investigate the impact of V(2)O(5) on DNA stability in workers from a V(2)O(5) factory.<h4>Methods</h4>We determined DNA strand breaks in leukocytes of 52 workers and controls using the alkaline comet assay. We also investigated different parameters of chromosomal instability in lymphocytes of 23 workers and 24 controls using the cytokinesis-block micronucleus (MN) cytome method.<h4>Results</h4>Seven of eight biomarkers were increased in blood cells of the workers, and vanadium plasma concentrations in plasma were 7-fold higher than in the controls (0.31 microg/L). We observed no difference in DNA migration under standard conditions, but we found increased tail lengths due to formation of oxidized purines (7%) and pyrimidines (30%) with lesion-specific enzymes (formamidopyrimidine glycosylase and endonuclease III) in the workers. Bleomycin-induced DNA migration was higher in the exposed group (25%), whereas the repair of bleomycin-induced lesions was reduced. Workers had a 2.5-fold higher MN frequency, and nucleoplasmic bridges (NPBs) and nuclear buds (Nbuds) were increased 7-fold and 3-fold, respectively. Also, apoptosis and necrosis rates were higher, but only the latter parameter reached statistical significance.<h4>Conclusions</h4>V(2)O(5) causes oxidation of DNA bases, affects DNA repair, and induces formation of MNs, NPBs, and Nbuds in blood cells, suggesting that the workers are at increased risk for cancer and other diseases that are related to DNA instability.
Keywords: comet assay
cytokinesis-block micronucleus assay
DNA damage
occupational exposure
vanadium pentoxide
DOI: 10.1289/ehp.11438
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Appears in Collections:Aurora harvest 5
Pharmacology publications

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