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- W3047314187 abstract "In vitro manipulation of spermatozoa leads to deleterious changes of structure and function that occur mainly due to oxidative stress, therefore, prevention or treatment is a strategy to improve the functions of processed sperm. In the present study, the aim was to evaluate the effects of MnTBAP supplementation, a compound with antioxidant activity, on in vitro capacitation conditions of thawed equine sperm. For this purpose, stallion spermatozoa (2 × 106 cells/mL) were incubated in the sperm-TLP base medium for 4 h in which there were three different conditions: non-capacitating, capacitating, and capacitating plus 150 mM MnTBAP. There were incubations for 4 h at 37.5 °C in a humidified air atmosphere. Sample analysis was performed immediately after thawing (0 h), and at the end of the incubation period (4 h), unless otherwise indicated. The following variables were evaluated for spermatozoa: plasma membrane integrity and fluidity, acrosome integrity, intracellular calcium concentrations, intracellular pH, tyrosine phosphorylation, ATP concentrations, motility and heterologous zona-binding assay, using flow cytometry, fluorescent microscopy and/or chemiluminescence, depending on the most appropriate procedure for the variable being evaluated. Results indicated that capacitation-like changes were synergistically induced by the cAMP agonists, phosphodiesterase inhibitor and bicarbonate. The presence of bovine serum albumin was harmful to the plasma membrane. The MnTBAP supplementation had a positive effect on viability-related markers (plasma membrane integrity, membrane fluidity, associated with greater intracellular pH) when there were capacitating conditions. In conclusion, the activity of MnTBAP contributes to improving the in vitro incubation conditions of frozen-thawed stallion sperm." @default.
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- W3047314187 date "2020-10-01" @default.
- W3047314187 modified "2023-10-01" @default.
- W3047314187 title "Effect of MnTBAP on in vitro capacitation of frozen-thawed stallion sperm" @default.
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- W3047314187 doi "https://doi.org/10.1016/j.anireprosci.2020.106570" @default.
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