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- W3106899878 abstract "In order to reduce exposure to toxic chemicals, the European REACH regulation (1907/2006) recommends substituting toxic molecules with compounds that are less harmful to human health and the environment. Toluene is one of the most frequently used solvents in industries despite its toxicity. The objective of this study is to better understand and compare the toxicity of toluene and its homologues in a bronchial cell model. Thus, human bronchial BEAS-2B cells were exposed to steams of toluene, m-xylene, mesitylene (1,3,5-trimethylbenzene), and benzene (20 and 100 ppm). Exposure was carried out using an air-liquid interface (ALI) system (Vitrocell) during 1 h/day for 1, 3, or 5 days. Cytotoxicity, xenobiotic metabolism enzyme gene expression, and inflammatory response were evaluated following cell exposures. BEAS-2B cell exposure to toluene and its homologues revealed the involvement of major (CYP2E1) and minor metabolic pathways (CYP1A1). A late induction of genes (EPHX1, DHDH, ALDH2, and ALDH3B1) was measured from Day 3 and can be linked to the formation of metabolites. An increase in the secretion level of inflammatory markers (TNF-α, IL-6, IL-8, MCP-1, and GM-CSF) was also observed. In parallel, regulation between inflammatory mediators and the expression of transmembrane glycoprotein mucin MUC1 was also studied. This in vitro approach with ALI system points out the relevance of conducting repeated exposures to detect potential late effects. The difference recorded after cell exposure to toluene and its homologues highlights the importance of substitution principle." @default.
- W3106899878 created "2020-12-07" @default.
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- W3106899878 date "2020-12-02" @default.
- W3106899878 modified "2023-10-17" @default.
- W3106899878 title "Toxicological responses of BEAS‐2B cells to repeated exposures to benzene, toluene, m ‐xylene, and mesitylene using air–liquid interface method" @default.
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- W3106899878 doi "https://doi.org/10.1002/jat.4113" @default.
- W3106899878 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33269480" @default.
- W3106899878 hasPublicationYear "2020" @default.
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