Korean Journal of Animal Reproduction (한국가축번식학회지)

The Korean Society of Animal Reproduction (한국동물번식학회)
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Effects of Growth Factors and Hexoses on In Vitro Development in Porcine Embryos

돼지수정란의 체외발육에 있어서 Growth Factors와 Hexoses의 영향

  • 윤선영 (강원대학교 동물자원과학대학) ;
  • 이상영 (경상남도 첨단양돈연구소 생명공학과) ;
  • 정희태 (강원대학교 동물자원과학대학) ;
  • 양부근 (강원대학교 동물자원과학대학) ;
  • 김정익 (강원대학교 동물자원과학대학) ;
  • 박춘근 (강원대학교 동물자원과학대학)
  • Published : 2003.09.01
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Abstract

The aim of this study was to investigate the effects of different hexoses in medium with IGF-I and/or EGF on in vitro development of porcine embryos. In first experiment, when the embryos were cultured in medium with concentrations of 5 ng/ml IGF-I and 10 ng/ml EGF, the morula and blastocyst rates were higher than in another culture conditions (P<0.05). In second experiment, the effect of IGF-I in medium with different hexoses during the embryo culture was examined. The higher cleavage rates were obtained in medium with glucose and IGF-I (P<0.05). However, the higher proportion of embryos developed to morula and blastocyst stages in medium with IGF-I were obtained than in medium without IGF-I in medium with glucose, mannose and galactose. In third experiment, the effect of EGF on in vitro development of porcine embryos in medium with different hexoses were examined. In the culture medium was supplemented with glucose, the higher proportions (P<0.05) of embryos developed to molura and blastocyst stages were obtained in medium with that than without EGF. However, the proportions of embryos developed to blastocyst stage were not significantly different between with and without of EGF in medium with different hexoses. In firth experiment, the effects of presence of IGF-I and EGF in medium with different hexoses on in vitro development of porcine embryos were examined. When culture medium was supplemented with IGF-I and EGF, the higher proportions of oocytes cleaved and developed to 8-cell stage were obtained in medium with glucose than mannose, galactose and fructose (P<0.05). These results show that glucose and growth factors, supported the development in vitro of porcine embryos, especially with greater embryo cleavage and development in medium with glucose added to media with IGF-I and/or EGF.

본 연구는 돼지 미성숙 난자를 체외에서 성숙, 수정시킨 뒤, 체외 수정란의 배양 시 성장인자와 6탄당의 첨가에 따른 체외 발육율을 검토하였다. 체외수정란의 발육을 위한 기본 배양액인 NCSU-23에 각각 0, 1, 5, 10 및 20ng/ml의 IGF-I과 EGF를 각각 첨가하여 농도의 차이에 따른 발육율을 검토하였다. 또한 5.56mM의 glucose, mannose, galactose 및 fructose에 5ng/ml의 IGF-I 또는 10ng/ml의 EGF 첨가 유, 무에 따른 초기배 발육율을 검토하였다. 마지막으로, 각각의 6탄당에 위와 같은 농도의 IGF-I와 ECF 공동 첨가 유, 무에 따른 초기배 발육율을 검토하였다. 그 결과, 돼지 체외 수정란의 체외 발육 시 배양액 내에 서로 다른 농도의 IGF-I과 EGF를 첨가하였을 때 IGF-I은 5ng/ml(12%)에서, EGF는 10ng/m1(10%)의 실험구에서 가장 높은 배반포기 배의 발육율을 나타냈다. (p<0.05) 또한 각각의 6탄당과 IGF-I 또는 EGF 유, 무에 따른 초기배 발육율을 검토한 결과 IGF-I과 ECF모두 glucose 첨가시 타 첨가구에 비해 초기 발육 단계의 수정란 발육뿐만 아니라 배반포까지의 배발육(10∼11%)이 타 첨가구(3∼8%)에 비해 높게 나타났다. (p<0.05) 한편, 각각의 6탄당이 첨가된 배양액 내에 ICF-I과 EGF 공동첨가 유, 무에 따른 초기배 발육율을 검토한 결과 모든 실험구에서 EGF와 IGF-I 첨가 시 무첨가보다 높은 초기배 발육율을 나타냈으며 특히 초기 분열단계 수정란에서는 발육의 차이가 크게 나타났다. 본 연구 결과 성장인자와 6탄당의 첨가는 돼지 수정란의 체외배양 시 초기배 배발육에 효과적인 영향을 미치는 것으로 사료되며, 이는 체외 발육율이 타 가축에 비해 낮은 돼지의 수정란 생산에 있어 체외배양체계의 개선을 위한 기초자료가 될 수 있을 것으로 기대된다.

Keywords

References

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