돼지 난모 세포의 Ethanol 처리에 의한 단위 발생에 있어서 극체 방출란과 분할란 선별에 따른 배발달율 비교

서지정보

ㆍ발행기관 : 한국수정란이식학회 ㆍ수록지정보 : Journal of Embryo Transfer / 22권 / 2호
ㆍ저자명 : 김현종, 조상래, 최창용, 최선호, 한만희, 손동수, 이승수, 상병돈, 류일선, 김인철, 김성재, 김일화, 김상근

한국어 초록

본 연구에서 돼지 난포란에서 채취된 난모 세포들을 체외성숙 후 형태적으로 선별하거나 극체 방출란을 선별하여 활성화 처리 후 48시간째에 분할란을 선별할 때 배발달율이 어느정도 향상되는지를 검토하였다. 난모 세포를 48시간 성숙 배양 후 형태적 선별과 극체의 방출 유무를 검사하고, 선별된 난모 세포들을 시간 추가 배양한 후 7% ethanol로 활성화시키고 cytochalasin B에 5시간 노출 후 PZM-5 배 양액으로 7일간 배양하였으며, 배양 중

영어 초록

The objective of this study was carried out to examine the selection effects of in vitro matured porcine follicular oocytes with polar body extrusion and early cleavage as non-invasive marker to know the developmental competence in advance. The porcine oocytes matured for 48 h were examined the polar body extrusion. The examined oocytes were matured for additional and activated with 7% ethanol and cultured in cytochalasin B for 5 h for diploid formation. The treated oocytes were cultured and examined the cleavage after 48 h and continued culturing for 5 days. The oocytes of 21.9% were discarded in morphological selection and 32.1% oocytes were discarded by failure of first polar body extrusion. The selected oocytes were matured and activated and then after 48 h the cleavage rates were examined. In morphologically selected oocytes, 15.8% oocytes were not cleaved and 52.6% oocytes were normally cleaved and 31.6% oocytes were hyper-cleaved over 8-cell stage. However in the first polar body extruded oocytes, 7.1% oocytes were not cleaved and 73.1% oocytes were normally cleaved and 19.8% oocytes were hyper-cleaved. The morphologically selected embryos that not cleavage-selected were developed in 16.7% up to blastocyst and the morphologically selected and cleavage-selected embryos were developed in 31.7%. The polar body extruded oocytes that were not carried out cleavage selection were developed in 39.0% and the polar body extruded and cleavage-selected embryos were developed 49.0%. The first cleavage timing was examined with 12 h interval after activation. In intervals, 4.1%, 68.6%, 19.1%, and 2.3% oocytes were cleaved and 5.9% oocytes were not cleaved until 48 after activation. The cleaved oocytes in each interval were cultured and developed upto blastocyst with 0, 39.1, 9.5, and 0%, respectively. This results suggests that polar body extruded and cleaved at embryo has higher developmental potential than the others.

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