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Study on Chemicals for Post-activation in Porcine Somatic Cell Nuclear Transfer

  • Min, Kyuhong (College of Veterinary Medicine, Chungnam National University) ;
  • Na, Seungwon (College of Veterinary Medicine, Chungnam National University) ;
  • Lee, Euncheol (College of Veterinary Medicine, Chungnam National University) ;
  • Kim, Ghangyong (College of Veterinary Medicine, Chungnam National University) ;
  • Yu, Youngkwang (College of Veterinary Medicine, Chungnam National University) ;
  • Roy, Pantu Kumar (College of Veterinary Medicine, Chungnam National University) ;
  • Fang, Xun (College of Veterinary Medicine, Chungnam National University) ;
  • Salih, MB (College of Veterinary Medicine, Chungnam National University) ;
  • Cho, Jongki (College of Veterinary Medicine, Chungnam National University)
  • Received : 2016.06.24
  • Accepted : 2016.06.28
  • Published : 2016.07.01

Abstract

Since the first success of animal cloning, somatic cell nuclear transfer presented various ideas in many research areas such as regenerative medicine. However, SCNT embryos has poor survival rate. Therefore, numerous researches carried out to enhance the developmental capability of porcine nuclear transfer embryos. Cytochalasin B, demecolcine, latrunculin A, cycloheximide and 6-dimethylaminopurine are efficient chemicals treated in post-activation procedure to increase the efficiency of SCNT. This review study is aim to investigate the effects of these chemicals applied to post-activation in porcine SCNT. Cytochalasin B, demecolcine, latrunculin A are cytoskeletal manuplators inhibit extrusion of pseudo-polar body. Cytochalasin B and demecolcine showed considerably higher blastocyst formation proportion (26-28%) compared to when they are not treated (16%). And when latrunculin A was treated for postactivation, blastocyst formation proportion was increased in SCNT embryos exposed to LA (38%) than those in control (14%). On the other hand, cycloheximide and 6-dimethylaminopurine are protein synthesis and kinase inhibitors. And they help to maintain $Ca^{2+}$ fluctuation in oocytes. Cleavage and blastocyst rates of NT embryos were increased when they were exposed to CHX (16.9% and 5.4% with no CHX).And 6-DMAP also showed higher blastocyst formation (21.5% compared to 15.7%, control). Although all these chemicals have different mechanisms, they showed developmental competence enhancement in NT embryos. However, there are only few studies comparing each chemical's post-activation effect. Therefore, further research and study should be conducted to find optimal chemical for improving the efficiency of SCNT.

Keywords

References

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