Applied Microscopy

Korean Society of Microscopy (한국현미경학회)
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Study on the Detection of In vivo and In vitro Hemocytic Pathway in Grasshopper, Euprepicnemis shirakii

메뚜기 체내와 체외에서 혈구생성 경로 추적에 관한 연구

  • 장병수 (동남보건대학 임상병리과)
  • Published : 2003.06.01
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Abstract

A Differentiating pathway of hemocytes in vitro and in vivo of grasshopper, Euprepocnemis shirakii was described using light and electron microscopes. In the interior of body, the stem cells of the hemopoietic organ differentiated into six types of cells respectively which are prohemoyte, plasmatocyte, granulocyte I, granulocyte II, spherulocyte and oenocytoid. The formation of these hemocytes was derived from the stem cells surrounded by a reticular cell. Hemopoietic tissue cultured in the insect media differentiated different hemocytes, but none of them underwent any mitotic division. Morphological features of the cultured cells in media were essentially the same as those of the hemocytes differentiated from the stem cells in vivo. These results were shown that each stem cell could differentiate into different types of hemocytes. It was confirmed that the stem cells possessed the pluripotent differentiation ability to directly each hemocyte, and that the once formed hemocytes in vivo and in vitro didn t undergo further transformation to other hemocytes. The maintenance of circulating hemocytes in grasshopper had been depended on the widely spreading hemopoietic organ situated in the upper surface of the dorsal alary muscle and located on the first to eighth segments.

메뚜기 체내와 체외에서 혈구 분화경로를 광학현미경과 전자현미경으로 관찰하였다. 조혈기관에서 혈구의 형성은 망상세포에 둘러싸인 줄기세포에서부터 유래되었으며, 줄기세포에서부터 원시혈구, 무정형혈구, I형 과립혈구, II형 과립혈구, 소구혈구 및 편도혈구가 각각 분화되는 것을 확인하였다. 곤충배지에 배양된 조혈조직에서 각각 다른 형태의 혈구들이 분화되어 방출되었다. 그러나, 이들 혈구들의 유사분열상은 관찰되지 않았다. 배지의 조혈기관에서 분화된 세포들의 형태학적 특징들은 메뚜기 체내의 조혈기관에서 분화된 세포들과 같았다. 이와 같은 결과는 줄기세포가 각각의 서로 다른 혈구들로 직접 분화하는 것을 의미한다. 본 연구 결과 조혈기관의 줄기세포는 각각의 혈구로 직접 분화할 수 있는 기능을 가지고 있었으며, 체내와 체외에서 한번 형성된 순환 혈구는 다른 혈구의 형태로 변형되지 않았다. 메뚜기에서 순환혈구의 유지는 복부 등쪽 첫 번째 마디에서 여덟 번째 마디 사이의 익상근 위에 광범위하게 존재하고 있는 조혈기관에 전적으로 의존하였다.

Keywords

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