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- W1963645573 abstract "The impact of TCM-199 supplemented with different proteins and heterologous hormones on the in vitro maturation (IVM) rate of bitch oocytes was evaluated by nuclear staining under fluorescence microscopy. Oocytes were recovered by slicing of ovaries from bitches presented at various stages of oestrous cycle to ovariohysterectomy. The basic culture medium was TCM-199 supplemented with 25 mM Hepes/l, with 10% heat-inactivated oestrous cow serum (ECS), 50 microg/ml gentamicin, 2.2 mg/ml sodium bicarbonate and 22-microg/ml pyruvic acid, 1.0-microg/ml oestradiol (E 8875; Sigma), 0.5-microg/ml follicle-stimulating hormone (FSH) (Folltropin-V; Vetrepharm Inc., Ontario, Canada) and 0.03 IU/ml human gonadotropin (hCG) (Profasi HP; Serono, Aubonne, Switzerland). Oocytes were distributed randomly between basic culture medium (control) and the corresponding experimental treatment. Hormone treatments were: oocytes cultured in; (1) medium without FSH, (2) control medium supplemented with 20 microg/ml oestradiol, or (3) medium supplemented with 1 microg/ml human somatotropin (hST; Humatrope, Lilly, Saint Cloud, France). The second experiment consisted of oocytes cultured in medium supplemented with 0.4% (w/v) bovine serum albumin (BSA, fraction V; Gibco Grand Island, NY, USA) instead of ECS, or oocytes cultured in medium with 10% inactivated oestrous bitch serum (EBS) instead of ECS. Oocytes were cultured in 100 microl droplets (up to 25 oocytes per drop) under mineral oil at 37 degrees C in a 100% humidified atmosphere containing 5% CO2 in air. After 72 h of IVM, the highest rates (p < 0.05) of meiotic resumption were achieved with the 0.4% BSA supplementation. A positive influence on the metaphase II (MII) acquisition rate was observed with hST supplement. Oocytes cultured with 10% EBS supplementation did not develop to the MII stage. The results in this study show that the protein and hormone supplements to TCM-199 culture medium tested did not promote the final steps of IVM of bitch oocytes." @default.
- W1963645573 created "2016-06-24" @default.
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- W1963645573 date "2003-01-17" @default.
- W1963645573 modified "2023-10-15" @default.
- W1963645573 title "Meiotic Response of<i>In vitro</i>Matured Canine Oocytes under Different Proteins and Heterologous Hormone Supplementation" @default.
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- W1963645573 doi "https://doi.org/10.1046/j.1439-0531.2003.00404.x" @default.
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