Journal of Embryo Transfer (한국수정란이식학회지)

The Korean Society of Embryo Transfer (한국수정란이식학회)
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Effects of Serum and Gonadotropins in In-Vitro Maturation Medium on Nuclear Maturation, Development and Cell Numbers of Korean Native Cow Embryos

체외성숙용 배지에 혈청과 호르몬의 첨가가 한우 난포란의 핵성숙과 배발달 및 배반포의 세포수에 미치는 영향

  • 박용수 (경상북도축산기술연구소) ;
  • 김재명 (포천중문의과대학 생리학교실) ;
  • 박흠대 (대구대학교 식품생명공학부)
  • Published : 2004.12.01
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Abstract

The main objective of this study was to examine the effects of serum and gonadotropins supplement during in vitro maturation(IVM) of bovine oocytes on nuclear maturation and embryo development, and we also examine the cell number. 1 . The first polar body(PB) extrusion rates of Korean native cow(KNC) oocytes matured in medium with FBS or gonadotropins were similar among treatment groups. The development rate to the blastocyst stage was significantly higher in the group of both supplement FBS and gonadotropins(26.0％) than in the group of non-supplement(9.9％) and gonadotropins (12.0％). The numbers of inner cell mass (ICM) and trophectoderm (TE) cells and total cell numbers of blastocysts were highest in the group of both supplement FBS and gonadotropins, and the number of ICM cells was increased by FBS supplementation (p<0.05). 2. The PB extrusion rates of KNC oocytes matured in medium with FBS in the different duration of IVM was significantly higher in the 0-18hr(63.1％) and in the 9-18hr(63.4％) group than in the 0-9hr.(37.4％) group (p<0.05). The embryo development rates did not differ among treatment groups. The numbers of TE cells and total cell numbers of blastocysts were similar among treatment groups, but the number of ICM cells of the 0-18h. group were significantly higher than the other treatment groups (p<0.05). The results indicate that although TCM199 alone can support bovine oocyte maturation and development to the blastocyst stage, a high quality of blastocysts can be produced from oocytes matured in medium containing serum and gonadotropins.

본 연구에서는 소 체외수정란 생산에 있어서 체외성숙용 배지에 첨가하는 혈청과 호르몬의 효과를 검토하기 위하여 제1극체 출현율과 배발달율을 조사하였고, 생산된 배반포의 품질을 평가하기 위하여 세포수를 검토하였다. 1. 체외성숙용 배지에 혈청 및 성선자극호르몬의 첨가에 따른 한우 난포란의 제1극체 출현율은 비슷한 경향이었다. 배반포까지의 발달율은 혈청 및 성선자극호르몬 공동 첨가군(26.0％)이 대조군과 성선자극호르몬 단독 첨가군보다 유의하게 높았다(P<0.05). 혈청 및 성선자극호르몬 공동 처리군에서 생산된 배반포의 ICM, TE, 총 세포수가 가장 많았으며, ICM 세포는 혈청 첨가로 유의하게 증가하였다(p<0.05). 2. 체외성숙용 배지에 혈청의 첨가시기에 따른 한우 난포란의 제1극체 출현율은 체외성숙 18시간 동안의 처리군과 체외성숙 9시간째부터 첨가한 처리군이 미첨가군보다 높았으며, 체 외 성숙 후 9시간까지의 처리군보다는 유의하게 높았다(p<0.05). 체외성숙용 배지에 혈청의 첨가시기에 따른 한우 난포란의 배발달율은 전군에서 비슷한 수준이었다. 배반포의 TE와 총세포수는 비슷한 경 향이었으나, ICM 세포수는 체외성숙 18시간 동안 처리군이 혈청 미첨가군보다 유의하게 높았다(p<0.05).

Keywords

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