Journal of Embryo Transfer (한국수정란이식학회지)

The Korean Society of Embryo Transfer (한국수정란이식학회)
권호 표지

Parthenogenetic Activation of Black Bengal Goat Oocytes

  • Haque, Aminul (Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University) ;
  • Bhuiyan, Mohammad Musharraf Uddin (Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University) ;
  • Khatun, Momena (Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University) ;
  • Shamsuddin, Mohammed (Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University)
  • Received : 2011.03.15
  • Accepted : 2011.04.25
  • Published : 2011.06.30
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Abstract

In vitro maturation and activation of oocytes are primary steps towards biotechnological manipulation in embryology. The objectives of the present study were to determine the oocyte recovery rate per ovary, in vitro maturation rates of oocytes and rates of parthenogenetically activation of matured oocytes in Black Bengal goats. All visible follicles were aspirated to recover follicular fluid from individual ovaries (number of ovaries = 456). The immature cumulus oocyte complexes (COCs; n = 1289) were cultured in tissue culture medium (TCM)-199 supplemented with 10% (v/v) fetal bovine serum (FBS) for 27 hours at $39^{\circ}C$ with 5% $CO_2$ in humidified air. The matured oocytes (n = 248) were activated with 5 ${\mu}M$ ionomycin for 5 minutes followed by treatment with 2 mM 6-dimethylaminopurine (6-DMAP) for 4 hours. After activation, oocytes were cultured for another 14 hours in TCM-199 supplemented with bovine serum albumin (BSA) at $39^{\circ}C$ with 5% $CO_2$ in humidified air. The pronucleus formation in activated oocytes was determined by staining with 1% orcein (whole mount technique). Matured oocytes (n = 176) without activation stimuli were used as control. The mean number of oocytes recovered per ovary was $3.5{\pm}0.5$. The proportion of oocytes matured in vitro, confirmed by the presence of first polar body, was $42.1{\pm}4.7%$. Parthenogenetic activation, evidenced by formation of pronucleus, occurred in $37.2{\pm}15.8%$ of matured oocytes. No pronucleus formation was observed in control oocytes. In conclusion, a combination of ionomycin and 6-DMAP induces activation in one third of Black Bengal goats' oocytes.

Keywords

References

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