Clinical and Experimental Reproductive Medicine

  • 제35권1호
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  • Pages.39-48
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  • 2008
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  • 2233-8233(pISSN)
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  • 2233-8241(eISSN)
대한생식의학회 (The Korean Society for Reproductive Medicine)
권호 표지

신생 생쥐 고환에서 기인한 다분화능 생식줄기세포주의 확립 및 특성 분석

Establishment and Characterization of Multipotent Germ Line Stem Cells (MGSCs) from Neonatal Mouse Testis

  • 한상철 (관동대학교 의과대학 제일병원 생식생물학 및 불임연구실) ;
  • 송행석 (관동대학교 의과대학 제일병원 생식생물학 및 불임연구실) ;
  • 전진현 (관동대학교 의과대학 제일병원 생식생물학 및 불임연구실)
  • Han, Sang-Chul (Laboratory of Reproductive Biology and Infertility, Cheil General Hospital & Women's Healthcare Center, Kwandong University College of Medicine) ;
  • Song, Haeng-Seok (Laboratory of Reproductive Biology and Infertility, Cheil General Hospital & Women's Healthcare Center, Kwandong University College of Medicine) ;
  • Jun, Jin-Hyun (Laboratory of Reproductive Biology and Infertility, Cheil General Hospital & Women's Healthcare Center, Kwandong University College of Medicine)
  • 발행 : 2008.03.30
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초록

목 적: 본 연구에서는 신생 생쥐 고환으로부터 다분화능 생식줄기세포주 (MGSCs)를 확립하고, 배아체 형성을 통한 삼배엽성 세포로의 분화 가능성을 확인하고자 하였다. 연구방법: 고환에서 유래한 MGSCs를 확립하기 위하여 생후 $2{\sim}3$일된 생쥐 고환 조직으로부터 세포들을 분리하여 1% FBS를 첨가한 생쥐 배아줄기세포주 배양조건에서 배양하였다. MGSCs 콜로니가 형성된 후에는 배양액의 FBS의 농도를 15%로 높였다. 이러한 과정으로 확립된 MGSCs의 미분화 및 분화 특성을 배아줄기세포주와 비교, 분석하였다. 결 과: 신생 생쥐 고환 조직에서 수획한 세포들로 실시한 9번의 배양실험에서 2개의 MGSCs 세포주를 확립하였다. MGSCs 세포주와 생쥐 배아줄기세포 모두에서 미분화 표지인자인 Thy-1, Oct-4, Nanog, Sox2의 발현과 alkaline phosphatase 활성을 관찰할 수 있었으며, MGSCs의 미세구조 또한 생쥐 배아줄기세포와 유사하였다. MGSCs에서 형성된 배아체에서 삼배엽성 표지유전자의 발현을 확인하였다. 결 론: 본 연구의 결과는 배아줄기세포의 윤리적인 문제점을 극복할 수 있는 고환 유래의 다분화능 MGSCs가 생물공학과 재생의학에서 효율적으로 이용될 수 있는 가능성을 보여준 것으로 생각된다.

Objective: The aim of this study was to investigate whether multipotent germline stem cells (MGSCs) can be established from neonatal mouse testis. Methods: Various cells containing MGSCs were collected from neonatal testis of ICR mice and allocated to plates for in vitro culture. After 7 days in culture, the cells were passed to a fresh culture plate and continuously cultured. From the third or fourth passage, the presumed MGSCs were cultured and maintained on mitomycin C-inactivated STO feeder cells. The MGSCs were cultured in a condition where mouse embryonic stem cells (ESCs) are cultured. Characteristics of the MGSCs were evaluated by RT-PCR, immunocytochemistry, alkaline phosphatase activity, karyotyping, and transmission electron microscopy. Results: Two MGSCs lines were established from 9 pooled sets of neonatal testicular cells. MGSCs colonies were morphologically undistinguishable from ESCs colonies and both MGSC lines as well as ESCs expressed undifferentiated stem cell markers, such as Thy-1, Oct-4, Nanog, Sox2 and alkaline phosphatase. Fine structure of undifferentiated MGSCs were similar to those of ESCs and 60% of MGSCs (12/20) had normal karyotype at passage 10. They were able to form embryoid bodies (EBs) and MGSC-derived EBs expressed marker genes of three germ layers. Conclusion: We could establish the MGSCs from neonatal mouse testis and they were differentiated to multipotent lineages of three germ layers. Molecular characteristics of MGSCs were similar to those of ESCs. Our results suggest a possibility that multipotent stem cells derived from testis, the MGSCs, could replace the ESCs in biotechnology and regenerative medicine.

키워드

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