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Reference Comparison of cellular and transcriptomic effects between electronic cigarette vapor and cigarette smoke in human bronchial epithelial cells.

Authors Anthérieu S, Garat A, Beauval N, Soyez M, Allorge D, Garçon G, Lo-Guidice JM.
Institution Univ. Lille, CHU Lille, Institut Pasteur de Lille, EA 4483, IMPECS - IMPact of Environmental ChemicalS on human health, F-59000 Lille, France. Electronic address:
Citation Toxicol In Vitro. 2017 Jan 5.
DOI ID 10.1016/j.tiv.2016.12.015
PubMed® ID 28065790
Review Status Is curated Curated.
Abstract The use of electronic cigarette (e-cig) can be considered as an alternative to smoking. However, due to a lack of thorough toxicological studies, absolute safety of these products cannot be guaranteed. The aim of this in vitro work was to investigate the potential toxicity of e-vapors generated by a smoking machine in human bronchial epithelial BEAS-2B cells cultured at air-liquid interface, in comparison to cigarette smoke (CS). Although CS decreased strongly cell viability from 48min exposure, e-vapors induced no cytotoxicity up to 288min exposure. Moreover, oxidative stress was evidenced only after exposure to CS, with a decrease secretion of GRO-ɑ from 8min and of IL-8 and MCP-1 after 48min exposure. Only a low increase of IL-6 secretion was measured in cells exposed to e-vapors. Finally, transcriptomic data of exposed cells indicated that a large number of genes were deregulated in response to CS, especially genes involved in important biological functions as oxidative stress and cell death, while e-vapors elicited very discrete modulation. These results strongly suggest a lower toxicity of e-vapors compared to CS in the BEAS-2B cell line and constitute a baseline for further experimental studies with a larger spectrum of e-liquids and e-cig models.