Reproductive and Developmental Biology

  • 제32권3호
  • /
  • Pages.199-203
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  • 2008
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  • 1738-2432(pISSN)
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  • 2288-0151(eISSN)
한국동물번식학회 (The Korean Society of Animal Reproduction)
권호 표지

체세포 복제란 이식 한우의 분만 전 혈장 Progesterone과 Estradiol-l7$\beta$ 농도 변화

The Expression of Plasma Progesterone and Estradiol-17$\beta$ Level before Parturition in the Recipients Pregnant by Hanwoo SCNT Embryos

  • 황성수 (농촌진흥청 축산과학원 응용생명공학과) ;
  • 최선호 (농촌진흥청 축산과학원 축산기술지원과) ;
  • 장유민 (농촌진흥청 축산과학원 응용생명공학과) ;
  • 고응규 (농촌진흥청 축산과학원 응용생명공학과) ;
  • 양병철 (농촌진흥청 축산과학원 응용생명공학과) ;
  • 임기순 (농촌진흥청 축산과학원 응용생명공학과) ;
  • 민관식 (한경대학교 생물환경정보통신전문대학원) ;
  • 성환후 (농촌진흥청 축산과학원 응용생명공학과)
  • Hwang, Seong-Soo (Animal Biotechnology Division, National Institute of Animal Science, RDA) ;
  • Choi, Sun-Ho (Technology Application Division, National Institute of Animal Science, RDA) ;
  • Chang, Yoo-Min (Animal Biotechnology Division, National Institute of Animal Science, RDA) ;
  • Ko, Yeoung-Gyu (Animal Biotechnology Division, National Institute of Animal Science, RDA) ;
  • Yang, Byong-Chul (Animal Biotechnology Division, National Institute of Animal Science, RDA) ;
  • Im, Gi-Sun (Animal Biotechnology Division, National Institute of Animal Science, RDA) ;
  • Min, Kwan-Sik (Hankyong University) ;
  • Seong, Hwan-Hoo (Animal Biotechnology Division, National Institute of Animal Science, RDA)
  • 발행 : 2008.09.30
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초록

본 연구는 한우 체세포를 이용하여 생산된 복제란을 한우 대리모에 이식하여 임신이 확인된 개체에서 임신 기간 중 주요 호르몬의 발현 특성을 인공수정으로 임신된 대리모와 비교 분석하고자 실시하였다. 한우 섬유아세포를 이용하여 생산된 체세포 복제란을 자연발정으로 동기화된 한우 대리모에 이식하여 임신이 확인된 개체를 공시하였으며(n=8), 대조군으로는 인공수정으로 임신된 대리모을 사용하였다(n=5). 발정 관찰 후 60일경에 직장검사로 임신을 확인하였다. 주요 스테로이드 호르몬인 progesterone(P4)와 estradiol-l7$\beta$ (E2) 농도는 방사선동위원소 면역분석시험(RIA) 방법을 이용하였으며, 혈중 cortisol 농도는 ELISA 방법으로 측정하였다. 인공수정한 대리모의 경우 E2 농도가 분만 시기에 급격하게 증가하였으나, P4 농도는 분만 시기에 급격하게 감소하는 경향을 나타내었다. 이에 반해 복제란 이식우의 혈장 P4 농도는 분만 50일 전부터 분만 10일전까지는 대조군과 유사하게 유지되었으나, 분만예정일에는 전혀 떨어지지 않고 높은 수준으로 유지되었다. 한편, 복제란 이식우에서 분만 때까지 정상적으로 임신이 유지된 대리모들의 경우는 임신 기간 동안 cortisol 농도는 임신 후반기까지 낮게 유지되며 별다른 변화를 나타내지 않았다. 반면에 유산이 일어난 개체의 경우에는 임신 100일경에 cortisol의 농도가 급격하게 증가하는 것을 확인하였다. 이상의 결과를 종합하여 보면, 복제란 이식우의 경우 분만예정일 전 후에 일어나는 급격한 호르몬의 변화가 일어나지 않음을 확인할 수 있었으며, 이러한 현상은 복제란 이식우의 분만 지연과 밀접한 관계가 있는 것으로 사료된다.

This study was performed to analyze the characterization of plasma hormonal levels during pregnancy in the Hanwoo recipients pregnant by artificial insemination (AI) or somatic cell nuclear transfer (SCNT) embryos. The synchronized recipients pregnant by SCNT embryos produced by Hanwoo fetal fibroblast cells (n=8) and by AI (control, n=5) were used. The plasma hormonal levels were measured by RIA (P4 and E2) and ELISA (cortisol), respectively. In control, the increase of E2 and the decrease of P4 were occurred immediately before the initiation of parturition. The expression pattern of plasma P4 was similar in both groups from 50 to 10 days before parturition, however, it did not decrease even at the expected date of labor in the SCNT recipients. The plasma cortisol was expressed a lower level during pregnancy in the SCNT recipients. But, the cortisol was increased in the cow aborted around 100 days of pregnancy (n=1). Based on these results, it can be postulated that the failure of the hormonal changes immediately before parturition in the SCNT recipients may be one of the most important reasons for a delayed parturition in clone calving.

키워드

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