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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2018.1
- 수록면
- 119 - 127 (9page)
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The purpose of this study is to examined the electrofusion and activation conditions for the production of porcine somatic cell nuclear transfer (SCNT) embryos. In this study, immature oocytes were cultured in TCM-199 with and without hormones for 22 hours. Skin fibroblasts cells of porcine were transferred into the perivitelline space of enucleated in vitro matured oocytes. Cell fusion was performed with two different pulses that each one pulse (DC) of 1.1 kV/cm or 1.5 kV/cm for $30{\mu}sec$. After fusion subsequent activation were divided into three groups; non-treatment (control) and treatment with 2 mM 6-DMAP or $7.5{\mu}g/ml$ cytochalasin B for 4 hours. Transferred embryos were cultured in PZM-3 (Porcine Zygote Medium-3) in $5%\;CO_2$ and 95% air at $39^{\circ}C$ for 7 day. Apoptosis-related genes (Caspase-3, BCL-2, mTOR, and MMP-2) were analyzed by immunofluorescence staining. There was no significant difference between two different electrofusion stimuli in the cleavage rate; $64.9{\pm}4.8%$ in 1.1 kV/cm and $62.7{\pm}4.0%$ in 1.5 kV/cm. However, blastocyst formation rate (%) was significantly different among three different activation groups (no treatment, 2 mM 6-DMAP or $7.5{\mu}g/ml$ cytochalasin B) combined with electrofusion of 1.1 kV/cm. The blastocyst formation rate was $12.6{\pm}2.5$, $20.0{\pm}5.0$, and $34.9{\pm}4.3%$ in control, 2 mM 6-DMAP, and $7.5{\mu}g/ml$ cytochalasin B, respectively. Immunofluorescence data showed that expression levels of caspase-3 in SCNT embryos undeveloped to blastocyst stage were higher than those in the blastocyst stage embryos. Expression levels of Bcl-2 in blastocyst stage embryos were higher than those in the arrested SCNT embryos. These results showed that the combination of an electric pulse (1.1 kV/cm for $30{\mu}sec$) and $7.5{\mu}g/ml$ cytochalasin B treatment was effective for production of the porcine SCNT embryos.
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