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• W3094907862 abstract "Abstract Essential oils (EOs) have attracted increased interest for different applications such as food preservatives, feed additives and ingredients in cosmetics. Due to their reported variable composition of components, they might be acutely toxic to humans and animals in small amounts. Despite the necessity, rigorous toxicity testing in terms of safety evaluation has not been reported so far, especially using alternatives to animal models. Here, we provide a strategy by use of alternative in vitro (cell cultures) and in vivo ( Caenorhabditis elegans , hen’s egg test) approaches for detailed investigation of the impact of commonly used rosemary, citrus and eucalyptus essential oil on acute, developmental and reproductive toxicity as well as on mucous membrane irritation. In general, all EOs under study exhibited a comparable impact on measured parameters, with a slightly increased toxic potential of rosemary oil. In vitro cell culture results indicated a concentration-dependent decrease of cell viability for all EOs, with mean IC 50 values ranging from 0.08 to 0.17% [v/v]. Similar results were obtained for the C. elegans model when using a sensitized bus-5 mutant strain, with a mean LC 50 value of 0.42% [v/v]. In wild-type nematodes, approximately tenfold higher LC 50 values were detected. C. elegans development and reproduction was already significantly inhibited at concentrations of 0.5% (wild-type) and 0.1% (bus-5) [v/v] of EO, respectively. Gene expression analysis revealed a significant upregulation of xenobiotic and oxidative stress genes such as cyp-14a3 , gst-4 , gpx-6 and sod-3 . Furthermore, all three EOs under study showed an increased short-time mucous membrane irritation potential, already at 0.5% [v/v] of EO. Finally, GC–MS analysis was performed to quantitate the relative concentration of the most prominent EO compounds. In conclusion, our results demonstrate that EOs can exhibit severe toxic properties, already at low concentrations. Therefore, a detailed toxicological assessment is highly recommended for each EO and single intended application." @default.
• W3094907862 created "2020-11-09" @default.
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• W3094907862 date "2020-11-07" @default.
• W3094907862 modified "2023-10-12" @default.
• W3094907862 title "Acute, reproductive, and developmental toxicity of essential oils assessed with alternative in vitro and in vivo systems" @default.
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• W3094907862 doi "https://doi.org/10.1007/s00204-020-02945-6" @default.
• W3094907862 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7870616" @default.
• W3094907862 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33159585" @default.
• W3094907862 hasPublicationYear "2020" @default.
• W3094907862 type Work @default.

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