Protective effects of phenolic acids on mercury-induced DNA damage in precision-cut kidney slices

Carranza-Torres, Irma Edith and Viveros-Valdez, Ezequiel and Guzmán-Delgado, Nancy Elena and García-Davis, Sara and Morán-Martínez, Javier and Betancourt-Martínez, Nadia Denys and Balderas-Rentería, Isaías and Carranza-Rosales, Pilar (2019) Protective effects of phenolic acids on mercury-induced DNA damage in precision-cut kidney slices. Iranian Journal of Basic Medical Sciences, 22 (4). pp. 367-375.

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Abstract

Objective(s): Precision-cut tissue slices are considered an organotypic 3D model widely used in biomedical research. The comet assay is an important screening test for early genotoxicity risk assessment that is mainly applied on in vitro models. The aim of the present study was to provide a 3D organ system for determination of genotoxicity using a modified method of the comet assay since the stromal components from the original tissue make this technique complicated.Materials and Methods: A modified comet assay technique was validated using precision-cut hamster kidney slices to analyze the antigenotoxic effect of the phenolic compounds caffeic acid, chlorogenic acid, and rosmarinic acid in tissue slices incubated with 15 µM HgCl2. Cytotoxicity of the phenolic compounds was studied in Vero cells, and by morphologic analysis in tissue slices co-incubated with HgCl2 and phenolic compounds. Results: A modification of the comet assay allows obtaining better and clear comet profiles for analysis. Non-cytotoxic concentrations of phenolic acids protected kidney tissue slices against mercury-induced DNA damage, and at the same time, were not nephrotoxic. The highest protection was provided by 3 µg/ml caffeic acid, although 6 µg/ml rosmarinic and 9 µg/ml chlorogenic acids also exhibited protective effects.Conclusion: This is the first time that a modification of the comet assay technique is reported as a tool to visualize the comets from kidney tissue slices in a clear and simple way. The phenolic compounds tested in this study provided protection against mercury-induced genotoxic damage in precision-cut kidney slices.

Item Type: Article
Subjects: QW Microbiology and Immunology
Divisions: Journals > Iranian J Basic Medical Sciences
Depositing User: ijbms ijbms
Date Deposited: 12 Jun 2019 06:01
Last Modified: 12 Jun 2019 06:01
URI: http://eprints.mums.ac.ir/id/eprint/11255

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