RESUMO
We evaluated the addition of folic acid to the extender TRIS-egg yolk used in cryopreservation, seekingimprovements for the sperm kinetics and mitochondrial activity post-thawing. Were evaluated sevenejaculates/animal from six Santa Inês by Artificial Vagina, with minimum values of motility by 70.0% and vigor3. We evaluated the seminal pool for concentration and morphology. We diluted in Tris-egg yolk extender forcryopreservation, dividing it in control, Group 2 we added 10.000 uM and Group 3 we added 5000 uM of folicacid. We froze in straws(0.25 mL). Was evaluated for motility and vigor, post-thawing by slow term-resistancetest, the times T0, T60, T120 and T180 minutes one week after. For the mitochondrial activity evaluation, wasused cationic lipophilic fluorochrome JC-1. The folic acid effects were analyzed using ANOVA followed byStudent Newman-Keuls test. The groups with folic acid showed significant higher motility. Mitochondrialactivity did not differ between groups.(AU)
Assuntos
Animais , Masculino , Criopreservação/métodos , Criopreservação/veterinária , Ovinos/embriologia , Ácido Fólico/análogos & derivados , Ácido Fólico/análise , Antioxidantes/análiseRESUMO
We evaluated the addition of folic acid to the extender TRIS-egg yolk used in cryopreservation, seekingimprovements for the sperm kinetics and mitochondrial activity post-thawing. Were evaluated sevenejaculates/animal from six Santa Inês by Artificial Vagina, with minimum values of motility by 70.0% and vigor3. We evaluated the seminal pool for concentration and morphology. We diluted in Tris-egg yolk extender forcryopreservation, dividing it in control, Group 2 we added 10.000 uM and Group 3 we added 5000 uM of folicacid. We froze in straws(0.25 mL). Was evaluated for motility and vigor, post-thawing by slow term-resistancetest, the times T0, T60, T120 and T180 minutes one week after. For the mitochondrial activity evaluation, wasused cationic lipophilic fluorochrome JC-1. The folic acid effects were analyzed using ANOVA followed byStudent Newman-Keuls test. The groups with folic acid showed significant higher motility. Mitochondrialactivity did not differ between groups.