Reproductive and Developmental Biology

  • 제30권1호
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  • Pages.65-70
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  • 2006
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  • 1738-2432(pISSN)
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  • 2288-0151(eISSN)
한국동물번식학회 (The Korean Society of Animal Reproduction)
권호 표지

활성화 및 배양조건이 돼지 단위발생란의 발달 및 Apoptosis에 미치는 영향

Apoptosis and Development of Porcine Parthenogenetic Embryos Activated and Cultured in Different Condition

  • 황인선 (농촌진흥청 축산연구소, 강원대학교 수의학부대학) ;
  • 서진성 (농촌진흥청 축산연구소) ;
  • 정희태 (강원대학교 수의학부대학) ;
  • 임기순 (농촌진흥청 축산연구소)
  • Hwang In-Sun (National Livestock Research Institute, RDA, School of Veterinary Medicine, Kangwon National University) ;
  • Seo Jin-Sung (National Livestock Research Institute, RDA) ;
  • Cheong Hee-Tae (School of Veterinary Medicine, Kangwon National University) ;
  • Im Gi-Sun (National Livestock Research Institute, RDA)
  • 발행 : 2006.03.01
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초록

본 연구는 활성화처리 방법 및 배양 조건이 돼지 단위발생란의 체외발달 및 apoptosis에 미치는 영향을 알아보기 위해 실시되었다. 도축장 유래 난소로부터 채취된 미성숙 난자를 $42{\sim}44$시간 동안 성숙배양한 후 사용하였다. Apoptosis는 TUNEL 방법을 사용하여 조사하였다. 실험 1에서는 성숙배양된 난자들을 electric pulse(1.2 kV/cm for $30{\mu}sec$ 2회, E), E + 6-dimethylaminopurine(6-DMAP) 또는 E + cycloheximide(CH) 방법으로 활성화 처리하여 PZM-3를 이용하여 5% $CO_2,\;38.5^{\circ}C$에서 배양하였다. 실험 2에서는 전기자극을 이용하여 활성화처리된 난자들을 각각 PZM-3 또는 NCSU-23 배양액 내에서 배양하였다. 각 배양액 내의 난자들은 각각 20% $O_2$ 조건으로 나뉘어 배양하였다. E + 6-DMAP(36.5%) 또는 E + CH 구(32.5%)에서 E 구(27.7%)보다 유의적으로 높은 배반포 형성율을 보였다(P<0.05). 처리별 apoptosis 발생율은 각각 5.3%(E), 7.7%(6-DMAP) 및 7.1%(CH)였다. 실험 2에서는 PZM-3 구의 배반포 형성율이 NCSU-23 구에 비하여 산소분압조건과 관계없이 다소 높았다$(28.2{\sim}29.7%\;vs.\;22.6{\sim}24.4%)$. PZM-3 및 20% $O_2$ 조건하에서 유의적으로 낮은 apoptosis 발생 비율을 나타냈다(9.2%, P<0.05). 그러므로 돼지 단위발생란을 chemical agent를 이용한 추가 활성화처리 후 PZM-3, 20% $O_2$, 조건으로 배양하면 더 나은 배반포 발생율을 얻을 수 있다고 생각된다.

This study investigated apoptosis and in vitro development of parthenogenetic preimplantation porcine embryos. In vitro matured oocytes for $42{\sim}44h$ were used. Apoptotic cell death was analyzed by using a terminal deoxynucleatidyl transferase mediated deoxyuridine 5-triphosphate nick-end tabling (TUNEL) assay. In experiment 1, oocytes were activated with two electric pulses (CH) of 1.2 kV/cm for $30{\mu}sec$ (E), E + 6-dimethylaminopurine (6-DMAP) or E + cycloheximide (CH) and cultured in PZM-3 under 5% $CO_2$ in air at $38.5^{\circ}C$. In experiment 2, oocytes were activated by E and cultured in PZM-3 or NCSU-23 under a gas atmosphere of 20% $O_2$ ($5%\;CO_2$, in air) or 5% $O_2$ $(5%\;CO_2,\;5%\;O_2\;90%\;N_2)\;at\;38.5^{\circ}C$. Oocytes activated with E+6-DMAP or E+CH showed higher blastocyst rates (36.3% and 32.5%) compared to E alone (27.7%). The frequency of apoptosis according to treatments were 5.3%, 7.7% and 7.1% respectively. Oocytes activated with E alone showed lower (P<0.05) frequency of apoptosis compared to other groups. In experiment 2, parthenotes cultured in PZM-3 showed slightly higher blastocyte rates (28.2% and 29.7%) compared to NCSU-23 (22.6% and 24.4%) regardless of atmosphere. Blastocysts generated in PZM-3 showed lower (P<0.05) apoptosis rate under 20% $O_2$ (9.2% vs 16.9%), whereas those in NCSU-23 had slightly lower apoptosis rate under 5% $O_2$ (14.0% vs 18.4%). This result represents that activation method and culture condition could affect the frequency of apoptosis as well as in vitro developmental rate.

키워드

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