DNA damage and oxidative stress induced at low doses by the fungicide hexachlorobenzene in human intestinal Caco-2 cells - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement
Journal Articles Toxicology Mechanisms and Methods Year : 2015

DNA damage and oxidative stress induced at low doses by the fungicide hexachlorobenzene in human intestinal Caco-2 cells

Abstract

Context: Hexachlorobenzene (HCB), a persistent chlorinated organic chemical, could be detected in human tissues in several countries of the world. Human exposure to Persistent Organic Pollutants (POPs) occurring primarily through diet, HCB and its metabolites are therefore supposed to interact directly with intestinal mucosa.Objective: The aim of this study was to investigate the possible effects of low doses of HCB on DNA integrity, cellular viability, differentiation and oxidative status in vitro in human colonic carcinoma cell line Caco-2.Materials and methods: Cells were exposed to increasing doses of HCB for 14 days to assess the cytotoxic, genotoxic and oxidative properties of this compound. The involvement of oxidative stress in the observed effects was evaluated by co exposure of Caco-2 cells with HCB and -tocopherol.Results: Exposure of Caco-2 cells to HCB resulted in a dose-dependent cytotoxicity, DNA damages and alterations of the cell layer integrity and the barrier function. Moreover, exposure of Caco-2 cells to HCB led to an enhancement of H2O2 production and to an increased activity of antioxidant enzymes. In addition, Co exposure of Caco-2 cells to HCB and -tocopherol reversed the effects observed in cells exposed to HCB alone.Conclusion: These results suggested that HCB effects on Caco-2 cells could be linked, at least in part, to its pro-oxidative potential.
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Dates and versions

hal-02636714 , version 1 (27-05-2020)

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Hala Chalouati, Elisa Boutet-Robinet, Benjamin Metais, Edwin Fouché, Mohamed Moncef Ben Saad, et al.. DNA damage and oxidative stress induced at low doses by the fungicide hexachlorobenzene in human intestinal Caco-2 cells. Toxicology Mechanisms and Methods, 2015, 25 (6), pp.448-458. ⟨10.3109/15376516.2015.1082000⟩. ⟨hal-02636714⟩
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