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The voltage-gated T-type Ca2+ channel is key to the sperm motility of Atlantic salmon (Salmo salar)

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Abstract

Ca2+ is a key element in the sperm activation process of Salmo salar. However, the molecular mechanisms by which this ion enters the sperm cell have been poorly studied. In this study, we examined, for the first time, the role of the voltage-gated T-type Ca2+ channel in the activation of sperm motility of Salmo salar. Using an in vitro inhibition assay, a significant decrease in total and progressive motility (P < 0.0001) was observed in Salmo salar sperm when they were treated with NNC-55-0396, a highly selective blocker. The in silico analysis showed that this blocker is docked with a strong affinity for the pore of the voltage-gated T-type calcium channel suggesting the blocking of Ca2+ ions. The results show that the T-type voltage-gated Ca2+ channel is key to sperm motility in Salmo salar.

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Funding

This work was supported by the DI12-PEO1 DIUFRO, DIE14-0001 DIUFRO, FONDECYT 1180387 projects and the UFRO PhD scholarship.

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Correspondence to Jorge G. Farias.

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Beltrán, J.F., Belén, L.H., Lee-Estevez, M. et al. The voltage-gated T-type Ca2+ channel is key to the sperm motility of Atlantic salmon (Salmo salar). Fish Physiol Biochem 46, 1825–1831 (2020). https://doi.org/10.1007/s10695-020-00829-1

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  • DOI: https://doi.org/10.1007/s10695-020-00829-1

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