Studies on the Porcine Oocytes Activation Regimed for Nuclear Transfer and Development Following Co-culture of Nuclear Transferred Embryos |
Sang-keun Kim1, Man-hwi Rhee2 |
1College of Veterinary Medicine, Chungnam National University 2Dept. of Neurophysiology, Washington University |
핵 이식을 위한 돼지난자의 활성화 및 핵 이식 배와 공배양에 따른 체외발생에 관한 연구 |
김상근1, 이만휘2 |
1충남대 수의대 2 |
|
Abstract |
This study was carried out to investigate the optimal activation condition for parthenogenetic development. In order to activate oocytes at 24 hrs post onset of maturation, the oocytes were cultured $3{sim}13{mu}M;Ca^{2+}$ for 5 min., $5-8{mu}g/ml$ cytoclacin for 6 hrs, 0.5~2.0 mM 6-dimethylaminopurine(DMAP) for 3 hrs alone or combination. The activated oocytes were cultured in TCM-199 media at 5% $CO_2$, 95% air, $38^{circ}C$. The cleavage rate after 48 hrs culture of oocytes treated with $3-13{mu}M;Ca^{2+}$, $5-8{mu}g/ml$ cytoclacin and 0.5~2.0 mM DMAP for 5 min., 6 hrs and 3 hrs were 9.6%~20.0%, 0.0%~7.3% and 9.4%~21.8%, 0.0%~7.3% and 9.1%~21.8% and 0.0%~7.3%, respectively. When oocyte were treated with $10{mu}M;Ca^{2+}$, $10{mu}g/ml$ cytoclacin and 2.0 mM DMAP the blastocyst formation rate was significantly higher than other group. The cleavage rate after 48 hrs culture of oocytes treated with $Ca^{2+}$ + cytoclacin, $Ca^{2+}$ + DMAP, cytoclacin + DMAP were 75.9%~93.5% and 9.7%~19.0%, respectively. When oocytes were treated with $Ca^{2+}$ followed by DMAP, the blastocyst formation rate was significantly higher than other group(p<0.05). When necleus transferred embryos co-cultured with bovine serum albumin(BSA), epithemal growth factor(EGF) and calf serum(CS), the developmental rate to blastocyst were higher than control group. |
Key Words:
parthenogenesis, activation, $Ca^{2+}$, cytoclacin, DMAP |
|