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In vivo influence of sodium fluoride on sperm chemotaxis in male mice

  • Reproductive Toxicology
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Abstract

Reproductive process covers lots of procedures, including capacitation, hyperactivation, chemotaxis and the acrosome reaction. Each plays an important role in the success of fertilization. Although multiple studies have reported the toxic effects of fluoride on the male reproduction, the effect of fluoride on sperm chemotaxis is little known. This study is to examine the effect of fluoride on the sperm chemotaxis and then to reveal the underling mechanisms of fluoride toxicity in sperm chemotaxis. 260 healthy Kunming male mice (8 weeks old) were randomly divided into four groups and exposed to 50, 100, 150 mg NaF/L in the drinking water for 8 weeks. At the end of the exposure, sperm chemotaxis was examined using a microchannel-based device. Ca2+ concentration, adenylate cyclase (AC) content and mRNA expression of mACIII, mACVIII, Golf alpha, CatSper1, CatSper2 were measured to elucidate the possible molecular mechanisms. The results showed that the percentage of chemotactic sperm was decreased by NaF in a dose-dependent manner. In the 100 and 150 mg/L groups, Ca2+ concentration and AC content were notably lower than the control group. Compared with the control group, mRNA expression of CatSper1 in the 100 and 150 mg/L treatment groups was decreased significantly, and other genes showed no statistical difference. These data suggested that excessive fluoride did adversely affect sperm chemotaxis. The alteration of Ca2+ concentration, AC content and CatSper1 mRNA expression level may play a key role in the mechanism underlying the affection.

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Acknowledgments

This research was supported by China National Natural Science Foundation (31072180, 31201965 and 31172376).

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The authors declare that there are no conflicts of interest.

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Correspondence to Jundong Wang.

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Zhaojing Lu, Shaolin Wang and Zilong Sun have contributed equally to this work and should be considered co-first authors.

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Lu, Z., Wang, S., Sun, Z. et al. In vivo influence of sodium fluoride on sperm chemotaxis in male mice. Arch Toxicol 88, 533–539 (2014). https://doi.org/10.1007/s00204-013-1099-0

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  • DOI: https://doi.org/10.1007/s00204-013-1099-0

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