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Effect of Vitrification of Feline Ovarian Cortex on Follicular and Oocyte Quality and Competence
(Wiley-Blackwell, 2012-06-01)
Cryopreservation of ovarian cortex has important implications in the preservation of fertility and biodiversity in animal species. Slow freezing of cat ovarian tissue resulted in the preservation of follicular morphology ...
Key genes involved in the acquisition of oocyte competencePrincipais genes implicados na aquisição de competência oocitária
(2019-01-01)
Despite meiotic arrest at diplotene stage of prophase I, oocytes from most domestic mammals retain the capacity for gene transcription due to the presence of descondensation areas in chromatin. With meiosis resumption under ...
Canine IVM With SOF Medium, Insulin-Transferrin-Selenium, and Low O2 Tension Improves Oocyte Meiotic Competence and Decreases Reactive Oxygen Species Levels
(Frontiers Media, 2021-09)
Assisted reproductive technologies in canine species are limited due to the low efficiency of in vitro maturation (IVM). Unlike other mammals, bitches ovulate oocytes in the germinal vesicle stage and complete metaphase ...
The Conditions of Ovary Storage Affect the Quality of Porcine Oocytes
(Scientific Research Publishing, 2014-08)
We studied the effect of different storage conditions of porcine ovaries (time, temperature) on the characteristics of the follicular fluid, immature oocyte quality, meiotic competence and in vitro fertilization of oocytes. ...
Effect of Vitrification of Feline Ovarian Cortex on Follicular and Oocyte Quality and Competence
(Wiley-Blackwell, 2014)
Differences in embryonic gene expression and quality indicate the benefit of epidermal growth factor receptor inhibitor during prematuration to improve competence in bovine oocytes
(2019-04-01)
The epidermal growth factor receptor (EGFR) pathway is directly involved in oocyte meiotic resumption induced by a gonadotropic stimulus. Here, we used an EGFR inhibitor (AG1478) to inhibit spontaneous meiosis resumption ...
Oocyte pre-IVM with caffeine improves bovine embryo survival after vitrification
(2016)
Cryopreservation of in vitro produced bovine embryos is associated with significantly reduced survival rates, mainly due to insufficient quality of the embryos. Caffeine supplementation during IVM has been used to delay ...
Loss of synaptonemal complex protein-1, a synaptonemal complex protein, contributes to the initiation of follicular assembly in the developing rat ovary
(ENDOCRINE SOC, 2005-12)
In the rat ovary, germ and somatic cells become organized into primordial follicles 48-72 h after birth. Although several genes have been implicated in the control of early follicular growth, less is known about the factors ...
Effect of oil overlay on inhibition potential of roscovitine in sheep cumulus-oocyte complexes
(Wiley-Blackwell, 2015-06-01)
Contents Inhibitors of cyclin-dependent kinases, as roscovitine, have been used to prevent the spontaneous resumption of meiosis in vitro and to improve the oocyte developmental competence. In this study, the interference ...
Fibroblast growth factor 2 regulates cumulus differentiation under the control of the oocyte
(Springer, 2019-05-01)
PurposeWe first assessed regulation of FGF2 expression in cumulus cells by FSH and oocyte-secreted factors during in vitro maturation (IVM). Then, we tested the hypothesis that FGF2 regulates meiotic progression, cumulus ...