Antagonistic Interaction of Selenium and Cadmium in Human Hepatic Cells Through Selenoproteins
| Autor: | Ramírez Acosta, Sara, Uhlírová, R., Navarro Roldán, Francisco Juan, Gómez Ariza, José Luis, García Barrera, Tamara |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
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| Zdroj: | Frontiers in Chemistry. 10 |
| ISSN: | 2296-2646 |
| DOI: | 10.3389/fchem.2022.891933 |
| Popis: | Cadmium (Cd) is a highly toxic heavy metal for humans and animals, which is associated with acute hepatotoxicity. Selenium (Se) confers protection against Cd-induced toxicity in cells, diminishing the levels of ROS and increasing the activity of antioxidant selenoproteins such as glutathione peroxidase (GPx). The aim of this study was to evaluate the antagonistic effect of selenomethionine (SeMet) against Cd toxicity in HepG2 cells, through the modulation of selenoproteins. To this end, the cells were cultured in the presence of 100 µM SeMet and 5 µM, 15 µM, and 25 µM CdCl2 and a combination of both species for 24 h. At the end of the experiment, cell viability was determined by MTT assay. The total metal content of Cd and Se was analyzed by triple-quadrupole inductively coupled plasma–mass spectrometry (ICP-QqQ-MS). To quantify the concentration of three selenoproteins [GPx, selenoprotein P (SELENOP), and selenoalbumin (SeAlb)] and selenometabolites, an analytical methodology based on column switching and a species-unspecific isotopic dilution approach using two-dimensional size exclusion and affinity chromatography coupled to ICP-QqQ-MS was applied. The co-exposure of SeMet and Cd in HepG2 cells enhanced the cell viability and diminished the Cd accumulation in cells. Se supplementation increased the levels of selenometabolites, GPx, SELENOP, and SeAlb; however, the presence of Cd resulted in a significant diminution of selenometabolites and SELENOP. These results suggested that SeMet may affect the accumulation of Cd in cells, as well as the suppression of selenoprotein synthesis induced by Cd. This work was supported by the projects PG2018-096608-B-C21 from the Spanish Ministry of Economy and Competitiveness (MINECO). SR-A thanks the Spanish Ministry of Economy and Competitiveness for a PhD scholarship (BES-2016-076364). The authors are grateful to FEDER (European Community) for financial support, grant UNHU13-1E-1611. |
| Databáze: | OpenAIRE |
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