Korean Journal of Animal Reproduction (한국가축번식학회지)

The Korean Society of Animal Reproduction (한국동물번식학회)
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Effect of Sucrose and Polybrene on the Gene Transfer into Porcine Oocytes using Retroviral Vector

레트로 바이러스 벡터를 이용한 돼지난자에의 유전자 전이에 있어 Sucrose와 Polybrene의 효과

  • Kim, . K.S. (Animal Resources Research Center, Konkuk University) ;
  • M.S. Kwon (Catholic Univ. of Daegu School of Medicine) ;
  • J.Y. Ju (Animal Resources Research Center, Konkuk University) ;
  • Kim, K.S. (Animal Resources Research Center, Konkuk University) ;
  • Kim, T. (Catholic Univ. of Daegu School of Medicine) ;
  • Lee, H.T. (Animal Resources Research Center, Konkuk University) ;
  • K.S. Chung (Animal Resources Research Center, Konkuk University)
  • Published : 2002.06.01
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Abstract

In vitro matured porcine oocytes have very small volume of perivitellinspace (PVS). In these respect, the effect of sucrose and polybrene on the efficiency of gene transfer was investigated. As a gene (hGH) transfer vehicle, vesicular stomatitis virus glycoprotein pseudotyped retroviral vector (VSV-G) was used. Sucrose treatment has no detrimental effect on the rates of cleavage and resulted in the enlargement of PVS for the efficient introduction of retroviral vector stocks. Introduction rates of retrovirus in 0.5, 1, 2, 3 % sucrose treatment group were higher than that of the non-treatment group (39.3, 43.3, 35.7, 40.7 % vs. 8.3 %), respectively. In addition, we observed that sucrose pretreatment during injection procedure significantly reduce the frequency of polyspermy. In general, polybrene is a polycation essential for retrovirus transduction. The groups with the addition of 0.5, 5, 50$\mu\textrm{g}$/$m\ell$ polybrene exhibited a significant effect on gene transfer compared to that of the non-addition group (56.5, 50.0, 57.1 % vs. 34.6 %), respectively But, when the oocytes were co-injected with retrovirus and 50$\mu\textrm{g}$/$m\ell$ polybrene, the rates of cleavage and blastocyst development were 43.3 and 4.6%, respectively. This rates were lower than those of the non-addition group (70.0 and 17.3 %). In conclusion, sucrose pretreatment have increased efficiency of retroviral mediated gene transfer in porcine oocytes with no damage on in vitro fertilization and embryo development. In addition, sucrose pretreatment was beneficial in polyspermy inhibition. Presence of polybrene during microinjection showed a beneficial effect on the gene transfer in porcine oocytes, in low concentration. And these results will provide an useful tool for production of transgenic pigs by retroviral mediated gene transfer.

본 연구에서는 레트로 바이러스를 이용하여 형질전환 돼지를 생산하기 위한 기초 연구로써 유전자 도입 효율을 증진시키기 위해 sucrose와 poly-brene을 사용하여 그 효과를 조사하였다. 유전자(hGH) 전달체로는 vesicular stomatitis virus gly-coprotein pseudotyped retroviral vector (VSV-G)를 사용하였다. 체외에서 성숙된 돼지 난자는 매우 협소한 위란강내 공간을 가지며 따라서 위란강내 공간의 확장은 필수조건이다. sucrose 처리는 수정율및 배발달에는 영향을 미치지 않았으며 sucrose 처리를 통해 돼지난자는 위란강의 공간이 확장되어 충분한 양의 바이러스 벡터의 주입이 가능하였다. PCR 분석 결과 8.3 %의 유전자 도입율을 나타낸 무처리군에 비해 0.5, 1, 2, 3 % sucrose 처리군에서 39.3, 43.3, 35.7, 40.7 %의 높은 유전자 도입율을 나타내었다. 추가적으로 돼지난자는 sucrose 처리에 의해 다정자 침입의 억제 효과를 나타내었다. 일반적으로 레트로 바이러스를 이용한 세포에의 높은 유전자 도입 효과를 나타내는 것으로 알려진 polybrene을 바이러스와 공동 주입한 결과 0.5, 5, 50$\mu\textrm{g}$/$m\ell$의 농도에서 각각 56.5, 50.0, 57.1 %의 도입율을 나타냄으로써 바이러스 단독 주입군의 34.6%보다 높은 효율을 나타내었다. 그러나 50$\mu\textrm{g}$/$m\ell$의 농도를 주입하였을 경우, 분할율과 배반포발달율이 43.3 및 4.6%를 나타냄으로써 바이러스 단독주입군의 72.0, 17.3%보다 유의적으로 낮았다. 이상의 결과를 종합할 때, sucrose의 처리는 돼지 난자의 발달에 영향을 주지 않으며 유전자 도입효율을 증진시킬 수 있었으며, 추가적으로 다정자 침입억제효과를 보였다. 또한 polybrene의 사용은 낮은 농도에서 유전자 도입효율을 증진시켰다. 이러한 결과들은 형질 전환 돼지의 생산 가능성을 높이는데 이용될 수 있다고 사료된다.

Keywords

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