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Assessment of oxidative stress responses and the cytotoxic and genotoxic potential of the herbicide tembotrione in HepG2 cells (CROSBI ID 230322)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Žunec, Suzana ; Kašuba, Vilena ; Pavičić, Ivan ; Marjanović, Ana Marija ; Tariba, Blanka ; Milić, Mirta ; Kopjar, Nevenka ; Pizent, Alica ; Lucić Vrdoljak, Ana ; Rozgaj, Ružica et al. Assessment of oxidative stress responses and the cytotoxic and genotoxic potential of the herbicide tembotrione in HepG2 cells // Food and chemical toxicology, 94 (2016), 64-74. doi: 10.1016/j.fct.2016.05.019

Podaci o odgovornosti

Žunec, Suzana ; Kašuba, Vilena ; Pavičić, Ivan ; Marjanović, Ana Marija ; Tariba, Blanka ; Milić, Mirta ; Kopjar, Nevenka ; Pizent, Alica ; Lucić Vrdoljak, Ana ; Rozgaj, Ružica ; Želježić, Davor

engleski

Assessment of oxidative stress responses and the cytotoxic and genotoxic potential of the herbicide tembotrione in HepG2 cells

Tembotrione is a triketone herbicide, usually used for post-emergence weed control in corn. Currently, there is little or no published data on its genotoxicity to human cells either in vitro or in vivo. This study evaluated the impact of acute (4 and 24 h) exposure to low concentrations of tembotrione [corresponding to the acceptable daily intake (0.17 mg/mL), residential exposure level (0.002 mg/mL) and acceptable operator exposure level (0.0012 mg/mL)] on human hepatocellular carcinoma cell line HepG2, using biomarkers of oxidative stress, CCK-8 colorimetric assay for cell viability, alkaline comet assay, and cytokinesis-block micronucleus “cytome” assay. Tembotrione applied at concentrations likely to be encountered in occupational and residential exposures induced cytogenetic outcomes in non- target cells despite non-significant changes in the values of oxidative stress biomarkers. We assume that the observed effects were mainly the consequence of impaired metabolic pathways in HepG2 cells due to the inhibition of the enzyme 4-hydroxyphenyl-pyruvate-dioxygenase by tembotrione, which possibly caused a depletion of folate levels leading to excess formation of nuclear buds in the affected cells. Regardless of the fact that tembotrione was previously reported negative for mutations and chromosome aberrations in vitro, our findings call for more precaution in its use.

DNA damage ; genome instability ; 4-Hydroxyphenyl-pyruvate-dioxygenase ; oxidative stress ; toxicity ; triketone herbicide

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Podaci o izdanju

94

2016.

64-74

objavljeno

0278-6915

10.1016/j.fct.2016.05.019

Povezanost rada

nije evidentirano

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