Can centrifugation force compromise the plasmatic membrane, acrosome and DNA integrity of goat spermatozoa?
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Data
2018-10-25
Autores
Crespilho, André Maciel
Bosco, Karinne Ávila
Dell’aqua, Camila de Paula Freitas [UNESP]
Segabinazzi, Lorenzo Garrido [UNESP]
Papa, Frederico Ozanam [UNESP]
Brás, Karoline Maria Gil
Gomes, Gustavo Mendes
Peixoto Junior, Kleber da Cunha
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Resumo
Protocols for cooling or freezing goat semen usually recommend centrifugation for seminal plasma removal. However, little is known about the effect of this process on goat sperm viability and functionality. The present study evaluated the effects of centrifugation force on the plasma membrane, acrosomes, and DNA integrity of goat semen. Four ejaculates from each of the four different Anglo Nubian male goats were used. Semen samples were obtained using artificial vagina, and immediately after collection, ejaculates were diluted using Ringer’s sodium lactate solution and split into three groups: Control (CG, without centrifugation), G1 (centrifugation 600 x g/10 min), G2 (centrifugation 1200 x g/10 min). After centrifugation, seminal plasma was removed, the sperm pellets were resuspended using Tris-egg yolk extender (80 x 106 spermatozoa/mL) and the sperm morphology was analyzed. Samples were cooled at 5°C for 5, 24, 36, and 48 h and then sperm plasma membrane and acrosome integrity (PMAI, %) and sperm DNA fragmentation index (SDF, %) were evaluated at each time-point, using a flow cytometer. Additionally, sperm movement was determined using computer semen analysis (CASA) after 5, 24, and 48 h of refrigeration period. The semen centrifugation did not induce additional sperm morphology defect or reduction in sperm kinetics in the experimental groups. Differences were not observed (p > 0.05) in PMAI and SDF among different groups, in any of each time-point of the cooling process. In conclusion, centrifugation, even at high speeds, did not affect goat sperm integrity and functionality when submitted to refrigeration process.
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Centrifugation, Goat, Integrity, Semen, Viability
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Brazilian Journal of Veterinary Research and Animal Science, v. 55, n. 3, 2018.