Early apoptosis detection in canine granulosa cells through the analysis of BCL-2 and BAX proteins during the follicular development associated with oocyte maturation

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dc.contributor.authorSalinger, Michelle
dc.contributor.authorPalomino, Jaime
dc.contributor.authorPeralta, Oscar A.
dc.contributor.authorParraguez, Victor H.
dc.contributor.authorde los Reyes, Monica
dc.date.accessioned2025-01-20T16:04:28Z
dc.date.available2025-01-20T16:04:28Z
dc.date.issued2024
dc.description.abstractThe objective of this study was to investigate the early follicular apoptosis in canine ovarian follicles by examining the expression of anti-apoptotic BCL-2 and pro-apoptotic BAX proteins throughout the estrous cycle associated with oocyte maturation. Follicular cells from preantral and antral follicles of varying sizes were isolated and grouped based on follicle type and estrous phase. Antral follicles underwent flow cytometry analysis, whereas preantral follicles were subjected to Western blotting. The meiotic capacity of oocytes from these different follicle types was evaluated through in vitro maturation. Statistical analysis included ANOVA and Duncan's test. Results showed fluctuations in BCL-2 and BAX levels across different follicular stages and estrous phases. BCL-2 levels increased (P<0.05) with follicular development in antral follicles, particularly during estrus, while BAX exhibited variations peaking (P<0.05) during estrus. The BCL-2/ BAX ratio in antral follicles was higher (P<0.05) in estrus and diestrus compared to anestrus and proestrus. Additionally, BCL-2 and BAX proteins were detected in preantral follicles, with varying expression levels (P<0.05) across estrous phases. The BCL-2/BAX ratio in preantral follicles was highest (P<0.05) during anestrus and estrus and decreased (P<0.05) in proestrus and diestrus. Oocytes from preantral follicles did not reach the MII stage, regardless of the levels of BCL-2/BAX. Conversely, oocytes obtained from large follicles during estrus showed the highest (P<0.05) maturation percentages, which were associated with the highest BCL-2/BAX ratio. These findings provide insights into the dynamic patterns of BCL-2 /BAX in canine follicles across the estrous cycle, shedding light on their potential roles in oocyte development.
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.anireprosci.2024.107635
dc.identifier.eissn1873-2232
dc.identifier.issn0378-4320
dc.identifier.urihttps://doi.org/10.1016/j.anireprosci.2024.107635
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/89768
dc.identifier.wosidWOS:001356799500001
dc.language.isoen
dc.revistaAnimal reproduction science
dc.rightsacceso restringido
dc.subjectAtresia
dc.subjectApoptotic proteins
dc.subjectDog
dc.subjectFollicular development
dc.subjectIn vitro maturatio n
dc.titleEarly apoptosis detection in canine granulosa cells through the analysis of BCL-2 and BAX proteins during the follicular development associated with oocyte maturation
dc.typeartículo
dc.volumen271
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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