Reproductive and Developmental Biology

The Korean Society of Animal Reproduction (한국동물번식학회)
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Development of Somatic Cell Nuclear Transfer Embryos Following Donor Cell Type and Cell Treatment in Cattle

Donor 세포의 종류 및 세포처리에 따른 소 체세포 핵이식란의 체외발육

  • 손준규 (강원대학교 동물자원과학대학) ;
  • 박정준 (축산연구소) ;
  • 박춘근 (강원대학교 동물자원과학대학) ;
  • 양부근 (강원대학교 동물자원과학대학) ;
  • 김정익 (강원대학교 동물자원과학대학) ;
  • 정희태 (강원대학교 동물자원과학대학)
  • Published : 2004.03.01
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Abstract

This study was conducted to investigate the effects of donor cell type, individual, passage number and trypsinization time on the in vitro development of bovine somatic cell nuclear transfer embryos. Three cell types (skin, muscle and cumulus cells) and cells from 3 individuals were used for nuclear transfer. Cell were passaged by 5, 15 or 30 times, and cell were trypsinized for 1 or 3 min before injection. Nuclear transfer were performed by conventional fusion method. Development rates to the blastocyst stage were not significantly different among three cell types (16.5∼23.9%) and individuals (16.4∼19.5%). Blastocyst formation rate of cloned embryos reconstituted with cells at passage 30 (5.8%) was significantly lower than those of embryos reconstituted with 5- and 15-passaged cells (25.3 and 23.5%, respectively, P＜0.05). The rate of embryos developed to the blastocyst stage was higher in embryos reconstituted with cells trypsinized for 1 min (30.7%) compared to embryos reconstituted with cells trypsinized for 3 min (P＜0.05). The result of the present study indicates that different donor cell types and individuals used in this study did not affect the development of cloned bovine embryos. However, passage number and trypsinization time of donor cells affect the in vitro development of cloned bovine embryos.

본 연구는 체세포의 종류, 세포 제공 개체, 계대배양 수 및 세포의 trypsin 처리시간이 소 체세포 핵이식란의 체외발육에 미치는 영향을 검토하였다. 세 종류의 체세포(피부, 근육 및 난구세포) 와 암소 3 개체를 실험에 공시하였으며, 한 개체 유래의 피부세포는 5∼30회 계대배양하였고, 핵이식 전에 1∼3분간 trypsin처리하여 핵이식에 사용하였다. 핵이식과정은 상법에 따라 전기융합법을 이용하였다. 핵이식란의 배반포 발육율은 세포의 종류(16.5∼23.9%)나 개체 간(16.4∼19.5%)에 차이가 없으나, 30회 계대 배양한 세포를 사용한 경우(5.8%)에는 5회(25.3%) 또는 15회(23.5%) 계대 배양한 세포를 사용한 경우에 비해 유의적으로 낮았다(P＜0.05). 또한, 1분간 trypsinization 한 세포를 사용한 경우(30.7%)는 3분간 trypsinization 한 경우에 비해 배반포 발육율이 유의적으로 높게 나타났다(P＜0.05). 본 연구의 결과는 소 체세포 핵이식란의 발육이 체세포의 종류 및 세포 제공 개체에 따라서는 영향을 받지 않으나, passage 수 및 체세포의 trypsinization 시간에 따라서는 영향을 받을 수 있음을 시사한다.

Keywords

References

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