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In vitro toxicity of various classes of test agents using the neutral red assay on a human three-dimensional physiologic skin model

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Summary

A new three-dimensional human skin model consisting of several layers of actively dividing and metabolically active human neonatal foreskin-derived fibroblasts and epidermal keratinocytes grown on nylon mesh has been used to assess the in vitro toxicity of test agents from various classes. Utilizing a slight modification of the published neutral red viability assay for endpoint determination, we have assayed and obtained dose-dependent toxicity curves for test agents from the following classes: detergents (n=15), alcohols (n=5), metal chlorides (n=10), perfumes and colognes (n=5), shampoos (n=4), conditioners (n=3), moisturizers (n=3), pesticides (n=3), and antimicrobial preservatives (n=4). Limited comparisons to in vivo ocular irritancy data with alcohols and detergents are encouraging. We have demonstrated the utility of this metabolically active dermal substrate containing naturally secreted collagen and other extracellular matrix proteins along with the neutral red viability assay for assessing the toxicity of a number of test agents from a variety of different classes with broad industrial applications.

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Authors and Affiliations

  1. Marrow-Tech, Inc., 10933 North Torrey Pines Road, 92037, La Jolla, California

    Dennis Triglia, Sonia Sherard Braa, Christine Yonan & Gail K. Naughton

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  1. Dennis Triglia
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  2. Sonia Sherard Braa
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  3. Christine Yonan
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  4. Gail K. Naughton
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Triglia, D., Braa, S.S., Yonan, C. et al. In vitro toxicity of various classes of test agents using the neutral red assay on a human three-dimensional physiologic skin model. In Vitro Cell Dev Biol - Animal 27, 239–244 (1991). https://doi.org/10.1007/BF02630923

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  • DOI: https://doi.org/10.1007/BF02630923

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