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- W1995462934 abstract "The brilliant cresyl blue (BCB) test determines the activity of glucose-6-phosphate dehydrogenase (G6PDH); the activity of this enzyme is greatest in growing oocytes, but it declines as oocytes mature. The objective was to develop and evaluate this test for assessing development of buffalo oocytes (to select developmentally competent oocytes for increased in vitro embryo production). Oocytes were exposed to BCB stain diluted in mDPBS (DPBS with 0.4% BSA) for 90 min at 38.5 °C in a humidified air atmosphere; those with or without blue coloration of the cytoplasm were designated as BCB+ and BCB−, respectively. In Experiment 1, oocytes were exposed to 13, 26, or 39 μM BCB. There were fewer BCB+ oocytes after exposure to 13 μM BCB (10%) than after exposure to 26 or 39 μM BCB (57.2 and 61.8%; P < 0.05), but there was no significant difference among treatments for blastocyst production rate. In Experiment 2, the diameter of BCB+ oocytes (144.4 ± 4.2 μm; mean ± S.E.M.) was higher (P < 0.05) than that of BCB− oocytes (136.8 ± 4.6 μm). In Experiment 3, oocytes were allocated into three groups: control (immediately cultured); holding-control (kept in mDPBS for 90 min before cultured); and treatment-incubation (incubated with 26 μM BCB). After IVM, oocytes were fertilized in vitro and cultured on an oviductal monolayer. The nuclear maturation rate was higher (P < 0.05) in BCB+ (86.2%), control (83.4%) and holding-control (82.6%) oocytes than BCB− (59.2%) oocytes. The BCB+ oocytes yielded more blastocysts than control or holding-control oocytes (33.4, 20.2, and 21.0%, P < 0.05); blastocyst development was lowest in BCB− oocytes (5.2%). In conclusion, staining of buffalo oocytes with BCB before IVM may be used to select developmentally competent oocytes for increased in vitro embryo production." @default.
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- W1995462934 date "2007-12-01" @default.
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- W1995462934 title "Selection of developmentally competent buffalo oocytes by brilliant cresyl blue staining before IVM" @default.
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- W1995462934 doi "https://doi.org/10.1016/j.theriogenology.2007.08.031" @default.
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