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발생 중인 포유류 망막으로 골수기질세포의 이식

Transplantation of Marrow Stromal Cells into the Developing Mammal Retina

  • 이은실 (경북대학교 자연과학대학 생물학과) ;
  • 권오주 (부산정보대학 보건웰빙학부 안경광학과) ;
  • 예은아 (신경과학프로그램, 아이오와 주립대학교) ;
  • 전창진 (경북대학교 자연과학대학 생물학과)
  • Lee, Eun-Shil (Dept. of Biology, College of Natural Sciences, Kyungpook National University) ;
  • Kwon, Oh-Ju (Dept. of Ophthalmic Optic, Busan College of Information Technology) ;
  • Ye, Eun-Ah (Neuroscience Program, Iowa State University) ;
  • Jeon, Chang-Jin (Dept. of Biology, College of Natural Sciences, Kyungpook National University)
  • 투고 : 2013.10.31
  • 심사 : 2013.12.14
  • 발행 : 2013.12.31

초록

목적: 골수기질세포는 생체 내 외에서 신경세포와 신경교세포로 교차분화 할 수 있는 능력을 가지고 있는 것으로 밝혀져 있다. 발생 중인 숙주 환경에 따라 이식된 골수기질세포의 생존여부, 형태학적 그리고 분자적 분화영향을 조사하기 위해 브라질산 주머니쥐 안구에 마우스 골수기질세포를 이식하였다. 방법: GFP를 발현하는 골수기질세포를 발생 중인 브라질산 주머니쥐의 각 시기별로 이식하여, 이식 후 최대 4주까지 생존시킨 후 각 시기별로 면역조직화학법을 시행하였다. 결과: 이식한 골수기질세포의 일부는 숙주동물의 유리체 내에서 생존하며 일부 돌기를 내는 신경세포로 형태학적 분화가 됨을 관찰할 수 있었다. 또한 유리체에 존재하는 일부 세포는 신경세포 표지인자인 TuJ1(class III ${\beta}$-tubulin), 신경교세포 표지인자인 GFAP(glial fibrillary acidic protein), 또는 신경줄기세포 표지인자인 Nestin 단백질을 발현하였다. 게다가, 일부 골수기질세포는 신경절세포층으로 이동함을 관찰했으나, 이동한 세포들은 형태학적 또는 분자적 분화를 나타내지는 않았다. 결론: 이번 연구에서 가장 효율적인 이식시기는 생후 16일째의 포유류 망막으로, 이는 망막세포의 분화양상과 층분화 패턴으로 미뤄볼 때 생후 4~5일 정도의 마우스 망막과 발생학적으로 상동함을 알 수 있었다. 또한 이식 받은 숙주 망막의 미세환경이 이식된 세포운명에 영향을 미치는 것을 확인할 수 있었다.

Purpose: Marrow stromal cells (MSCs) have been known for their potential to trans-differentiate into neural and glial cells in vitro and in vivo. To investigate the influence of the developing host environment on the survival and morphological and molecular differentiation, murine MSCs transplanted into the eye of Brazilian opossum (Monodelphis domestica). Methods: Enhanced green fluorescent protein (GFP) - expressing MSCs were transplanted into developing Brazilian opossums. Animals were allowed to survive for up to 4 weeks after transplantation, at which time the eyes were prepared for immunohistochemical analysis. Results: Some transplanted MSCs survived and showed morphological differentiation into neural cells with some processes within the host vitreous chamber. Some transplanted cells expressed class III ${\beta}$-tubulin (TuJ1, a marker for neuronal cells) or glial fibrillary acid protein (GFAP, a marker for glial cells) or Nestin (a marker for neural stem cells). In addition, some transplanted cells were located in ganglion cell layer but did not show morphological and molecular differentiation. Conclusions: Our result show that the most effective stage of development for transplantation into the retina was postnatal day 16, which retinas developmentally corresponded to postnatal day 4-5 days mouse retina based on cell differentiation and lamination patterns. The present findings suggest that the age of the host appears to play a key role in determining cell fate in vivo.

키워드

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