| Title: | In vitro toxicological evaluation of emissions from catalytic oxidation removal of industrial VOCs by air/liquid interface (ALI) exposure system in repeated mode |
| Author(s): | Meausoone C; El Khawaja R; Tremolet G; Siffert S; Cousin R; Cazier F; Billet S; Courcot D; Landkocz Y; |
| Address: | "UCEIV - EA4492, Unite de Chimie Environnementale et Interactions sur le Vivant, SFR Condorcet FR CNRS 3417, Universite du Littoral Cote d'Opale, Dunkerque, France. Centre Commun de Mesure, Universite du Littoral Cote d'Opale, Dunkerque, France. UCEIV - EA4492, Unite de Chimie Environnementale et Interactions sur le Vivant, SFR Condorcet FR CNRS 3417, Universite du Littoral Cote d'Opale, Dunkerque, France.. Electronic address: dominique.courcot@univ-littoral.fr" |
| DOI: | 10.1016/j.tiv.2019.03.030 |
| ISSN/ISBN: | 1879-3177 (Electronic) 0887-2333 (Linking) |
| Abstract: | "Toxicity of toluene and by-products formed during its catalytic oxidative degradation was studied in human bronchial BEAS-2B cells repeatedly exposed. BEAS-2B cells were exposed using an Air-Liquid Interface (ALI) System (Vitrocell(R)) for 1?ª+h per day during 1, 3 or 5?ª+days to gaseous flows: toluene vapors (100 and 1000?ª+ppm) and outflow after catalytic oxidation of toluene (10 and 100%). After exposure to gaseous flow, cytotoxicity, inflammatory response and Xenobiotic Metabolism Enzymes (XME) gene expression were investigated. No significant cytotoxicity was found after 5?ª+days for every condition of exposure. After cells exposure to catalytic oxidation flow, IL-6 level increased no significantly in a time- and dose-dependent way, while an inverted U-shaped profile of IL-8 secretion was observed. XME genes induction, notably CYP2E1 and CYP2F1 results were in line with the presence of unconverted toluene and benzene formed as a by-product, detected by analytical methods. Exposure to pure toluene also demonstrated the activation of these XMEs involved in its metabolism. Repeated exposure permits to show CYP1A1, CYP1B1 and CY2S1 expression, probably related to the formation of other by-products, as PAHs, not detected by standard analytical methods used for the development of catalysts" |
| Keywords: | Air Pollutants/chemistry/*toxicity Aluminum Oxide/chemistry Catalysis Cell Culture Techniques Cell Line Cell Survival/drug effects Cobalt/chemistry Cytochrome P-450 Enzyme System/genetics Gene Expression Regulation/drug effects Humans Industrial Waste Int; |
| Notes: | "MedlineMeausoone, Clemence El Khawaja, Rebecca Tremolet, Gauthier Siffert, Stephane Cousin, Renaud Cazier, Fabrice Billet, Sylvain Courcot, Dominique Landkocz, Yann eng England 2019/03/27 Toxicol In Vitro. 2019 Aug; 58:110-117. doi: 10.1016/j.tiv.2019.03.030. Epub 2019 Mar 22" |
