期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 438, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2022.129444
关键词
Selenium; Selenoproteins; Chemical cocktails; Metallomics; ICP-MS; Gut microbiota
资金
- Spanish Ministry of Science and Innovation (MICIN) [PG2018-096608-B-C21]
- Generacion del Conocimiento
- MCIN/AEI
- FEDER Andalusian Operative Program 2014-2020 (Ministry of Economy, Knowledge, Business and Universities, Regional Government of Andalusia, Spain) [UHU-1256905, UHU-202009]
- FEDER (European Community) [UNHU13-1E-1611]
- Universidad de Huelva/CBUA
- Ramon Areces Foundation [CIVP19A5918]
Biological systems are exposed to a complex environment where pollutants can interact through synergistic or antagonistic mechanisms. This study investigates the effects of selenium supplementation on gut microbiota, plasma selenoproteome, metabolome, and arsenic metabolization using different models and methods. The results show that selenium reduces the concentration of the antioxidant glutathione peroxidase in plasma and increases the arsenic methylation rate. Furthermore, synergistic deleterious effects were observed between pollutants, antibiotics, and selenium.
Biological systems are exposed to a complex environment in which pollutants can interact through synergistic or antagonistic mechanisms, but limited information is available on the combined effects. To this end, conventional and antibiotic-treated (Abx) mice models were fed regular rodent or selenium (Se) supplemented diets and exposed to a chemical cocktail (CC) including metals and pharmaceuticals. Metallomics, metabolomics, and metataxomics were combined to delve into the impact on gut microbiota, plasma selenoproteome, metabolome, and arsenic metabolization. At the molecular level, Se decreased the concentration of the antioxidant glutathione peroxidase in plasma and increased the arsenic methylation rate, possibly favoring its excretion, but not in the Abx and also plasma metabolomes of Abx, and Abx-Se were not differentiated. Moreover, numerous associations were obtained between plasma selenoproteins and gut microbes. Se-supplementation partially antagonizes the gut microbiota alteration caused by Abx, and slightly by CC, but strongly altered profiles were observed in CCAbx-Se, suggesting synergistic deleterious effects between pollutants, Abx and Se. Moreover, although CC and Abx changed gut microbiota, several common taxa were enriched in CC-Abx and control mice, indicating possible synergistic effects. Our results suggest a potential beneficial impact of supplementation, but mediated by gut microbes being reversed in their absence.
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