Efecto del cilostazol en la producción in vitro de ovejas
DOI:
https://doi.org/10.35172/rvz.2023.v30.1519Palabras clave:
embrión, MIV, FIV, ovino, PIVResumen
El objetivo de este estudio fue evaluar el efecto de la inclusión de cilostazol en el medio de maduración in vitro de ovocitos sobre la producción in vitro de embriones ovinos. Para ello, se realizaron recolecciones de ovocitos provenientes de ovarios obtenidos en un matadero mediante el método de aspiración folicular con bomba de vacío. Los ovocitos se dividieron en cuatro grupos de maduración: grupo CON, donde los complejos cúmulus ovocitos se sumergieron en TCM-199, suplementado con 500 UI de penicilina, 0,5 mg de estreptomicina, 1,25 µg de anfotericina, 0,2 mM de piruvato de sodio, 10% (v/v) de suero fetal bovino (SFB), 10 ng/mL de factor de crecimiento epidérmico (EGF), 10 µg/m de FSH, 10 µg/mL de LH, 10 µg/mL de estradiol y 100 µM de cisteamina; y en los grupos CILO0,3; CILO1 y CILO10, los ovocitos se maduraron en el medio del grupo CON, pero sin la adición de cisteamina y suplementado con las concentraciones de 0,3; 1 y 10 µM, respectivamente. Después de 24 horas, los ovocitos se evaluaron en cuanto a la presencia o no de células del cúmulus y en cuanto al grado de expansión y se destinaron a la fecundación in vitro, en medio FIV, junto con espermatozoides. Después de la FIV, los presuntos cigotos siguieron para el cultivo in vitro. Se evaluaron las clivajes en el día 2, siendo el día 0 el día del inicio del CIV. Los resultados se expresaron en porcentaje y las variables de expansión de las células del cúmulus y número de estructuras clivadas se compararon mediante la prueba del chi-cuadrado del software Epi Info (Epi Info 7.2.5, Atlanta, GA, EE. UU., 2021). Los resultados se consideraron significativos cuando P < 0,05. En relación a la expansión de las células del cúmulus, todos los grupos presentaron el 100% de expansión. No hubo diferencias significativas en cuanto al grado de expansión de las células del cúmulus entre los grupos suplementados con cilostazol y cisteamina (P > 0,05), así como no hubo diferencias significativas entre las tasas de clivaje entre los grupos suplementados con cilostazol y cisteamina (P > 0,05).
Citas
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