RT info:eu-repo/semantics/article T1 Melatonin affects red deer spermatozoa motility and physiology in capacitating and non‐capacitating conditions A1 Fernández‐Alegre, Estela A1 Lacalle Fernández, Estíbaliz A1 Soriano Úbeda, Cristina de las Mercedes A1 Domínguez Fernández de Tejerina, Juan Carlos A1 Casao, Adriana A1 Martínez Pastor, Felipe A2 Biologia Celular K1 Biología K1 Melatonin K1 Red deer K1 Sperm capacitation K1 Sperm physiology K1 Spermatozoon AB [EN] Melatonin affects sperm physiology, possibly through membrane receptors. Effects were tested at low concentrations (1 pM, 100 pM, 10 nM and 1 µM) in red deer epididymal spermatozoa as a model for high-seasonality species. Samples were incubated with melatonin as uncapacitated or capacitating conditions (heparin) and evaluated for motility and physiology (flow cytometry). Most effects occurred at low concentrations (nM-pM), mainly protecting from apoptosis and maintaining acrosomal integrity, suggesting a role for membrane receptors rather than a direct antioxidant effect. Intracellular calcium was not affected, differing from other studies and perhaps because of the epididymal origin. This study supports the relevance of melatonin on sperm physiology and could contribute to the application of reproductive technologies in wild ruminants. PB Wiley-Blackwell SN 0936-6768 LK http://hdl.handle.net/10612/15380 UL http://hdl.handle.net/10612/15380 NO Fernández-Alegre, E., Lacalle, E., Soriano-Úbeda, C., Carlos Domínguez, J., Casao, A., & Martínez-Pastor, F. (2022). Melatonin affects red deer spermatozoa motility and physiology in capacitating and non-capacitating conditions. Reproduction in Domestic Animals, 57(S5), 82-85. https://doi.org/10.1111/RDA.14137 DS BULERIA. Repositorio Institucional de la Universidad de León RD 25-abr-2024