Alcohol consumption promotes arsenic absorption but reduces tissue arsenic accumulation in mice
Date
2023
Authors
Wang, H.
Juhasz, A.L.
Zhang, Y.
Zhang, L.
Ma, L.Q.
Zhou, D.
Li, H.
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Journal article
Citation
Eco-Environment & Health, 2023; 2-3(3):107-116
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Abstract
Alcohol consumption alters gut microflora and damages intestinal tight junction barriers, which may affect arsenic (As) oral bioavailability. In this study, mice were exposed to arsenate in the diet (6 μg/g) over a 3-week period and gavaged daily with Chinese liquor (0.05 or 0.10 mL per mouse per day). Following ingestion, 78.0% and 72.9% of the total As intake was absorbed and excreted via urine when co-exposed with liquor at daily doses of 0.05 or 0.10 mL, significantly greater than when As was supplied alone (44.7%). Alcohol co-exposure significantly altered gut microbiota, but did not significantly alter As biotransformation in the intestinal tract or tissue.
Significantly lower relative mRNA expression was observed for genes encoding for tight junctions in the ileum of liquor co-exposed mice, contributing to greater As bioavailability attributable to enhanced As absorption via the intestinal paracellular pathway. However, As concentration in the liver, kidney, and intestinal tissue of liquor-treated mice was decreased by 24.4%–42.6%, 27.5%–38.1%, and 28.1%–48.9% compared to control mice. This was likely due to greater renal glomerular filtration rate induced by alcohol, as suggested by significantly lower expression of genes encoding for renal tight junctions.
In addition, in mice gavaged daily with 0.05 mL liquor, the serum antidiuretic hormone level was significantly lower than control mice (2.83 ± 0.59 vs 5.40 ± 1.10 pg/mL), suggesting diuretic function of alcohol consumption, which may facilitate As elimination via urine. These results highlight that alcohol consumption has a significant impact on the bioavailability and accumulation of As.
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Data source: Supplementary data, https://doi.org/10.1016/j.eehl.2023.06.003
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Copyright 2023 The Author(s). Published by Elsevier B.V. on behalf of Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment (MEE) & Nanjing University. (https://creativecommons.org/licenses/by-nc-nd/4.0/)