Abstract
To investigate the mechanism of fluoride-induced splenic toxicity, 0, 25, 50, and 100 mg/L sodium fluoride (NaF) were administered in male mice via drinking water for 90 days. After NaF treatment, the histological structure of the spleen, the proportion of helper T 1 cell (Th1) and helper T 2 cell (Th2), and the relative expression levels of cytokines and T-bet and GATA3 were analyzed. The results showed that 50 and 100 mg/L NaF consumption can change the normal structure of mouse spleen and the proportion of Th1/Th2 cells. It also decreased the mRNA expression levels of IL-2, INF-γ, and TGF-β, but increased the levels of IL-4, IL-6, and IL-10. Importantly, fluoride increased the protein expression of GATA3 but decreased the expression of T-bet. Our findings indicate that superfluous fluoride intake damages the balance of Th1/Th2 cells by changing the levels of T-bet and GATA3 in the spleen, and further changes the expression of Th1/Th2 cell-related cytokines in the spleen microenvironment, eventually leading to spleen injury.
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This work is supported by National Natural Science Foundation of China (grant no. 31672623) and Veterinary Environmental Lab (Shanxi Key Lab).
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Li, Y., Du, X., Zhao, Y. et al. Fluoride Can Damage the Spleen of Mice by Perturbing Th1/Th2 Cell Balance. Biol Trace Elem Res 199, 1493–1500 (2021). https://doi.org/10.1007/s12011-020-02264-y
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DOI: https://doi.org/10.1007/s12011-020-02264-y