Journal of fish pathology (한국어병학회지)

The Korean Society of Fish Pathology (한국어병학회)
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Histopathological observation of liver in cultured black rock fish Sebastes schlegeli in low temperature season

저수온기 양식 조피볼락, Sebastes schlegeli 간에 대한 조직병리학적 연구

  • Choi, Hye-Sung (Pathology Division, National Fisheries Research and Development Institute (NFRDI)) ;
  • Huh, Min-Do (Department of Aquatic Life Medicine, College of Fisheries Science, Pukyong National University) ;
  • Lee, Mu-Kun (Department of Aquatic Life Medicine, College of Fisheries Science, Pukyong National University) ;
  • Choi, Hee-Jung (Pathology Division, National Fisheries Research and Development Institute (NFRDI)) ;
  • Park, Myung-Ae (Pathology Division, National Fisheries Research and Development Institute (NFRDI))
  • 최혜승 (국립수산과학원 병리연구과) ;
  • 허민도 (부경대학교 수산생명의학과) ;
  • 이무근 (부경대학교 수산생명의학과) ;
  • 최희정 (국립수산과학원 병리연구과) ;
  • 박명애 (국립수산과학원 병리연구과)
  • Received : 2011.06.27
  • Accepted : 2011.09.21
  • Published : 2011.12.31
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Abstract

This study was aimed to determine the fish physical status according to the gross and histopathological findings of liver in cultured black rock fish, Sebastes schlegeli. All 47 fish submitted had no marked abnormalities in the external findings. 42.55% of fish showed normal liver, 25.53% yellow liver, 25.53% atrophic brown liver, 4.26% yellowish-green liver and 2.13% fatty liver in gross examination. Grossly normal liver showed no remarkable change in lobular structure but many vacuoles were found in hepatic cell. Hepatic cells took normal roundish, polygonal shapes containing spherical nuclei. In group of yellow-brown liver, many brown pigments were seen in hepatic cells, MMCs and brown-colored hyaline droplets within cytoplasm of hepatocytes. Yellowish green pigments were seen in hepatic cells and MMCs of yellow green liver and green colored hyaline droplets within hepatocytes. The dilated central veins are highlighted with atrophy of hepatic cells. Outline of atrophic hepatocyte became ambiguous and nucleus frequently become small and pyknotic. Fatty liver showed prominent vacuolar structures in cells as clear spaces or foamy cytoplasm with degenerative nuclei. From these results, it was strongly suggested that hepatic gross and histological findings could be used as important and critical health parameters of fish prior to progression to substantial manifestation as clinical disease.

본 연구에서는 조피볼락의 간의 육안적 색조에 따른 병리조직학적 소견 및 혈액학적 소견에 근거하여 건강상태를 확인하였다. 조피볼락 총 47개체 모두 외부 소견에서는 특기할 이상 소견이 없었으나, 간은 육안적으로 정상간 (42.55%), 황간 (25.53%), 갈변 위축간 (25.53%), 녹간 (4.26%) 및 지방간 (2.13%) 순으로 나타났다. 간의 육안적 소견에 따른 조피볼락의 간의 조직 소견 관찰시, 정상 간 개체는 HE 염색 시 간세포가 밝게 염색되며, 소엽구조가 불명확하게 관찰되었으나, 황간 개체는 황갈색의 과립이 간세포 및 MMC 내에 관찰되었으며, 간세포는 정상 간 개체에 비해 크기가 위축되어 세포질이 짙은 호산성으로 관찰되며, 세포질 내에 핵과 유사한 크기의 황갈색 초자적이 한 개 이상 관찰되었다. 한편, 녹간 개체는 정상 간 개체에 비해 간세포 크기가 위축으로 관찰되며, HE 염색 시 황갈색과 녹색의 초자적이 간세포 및 MMC 내에 관찰되었으며, 담즙색소 동정을 위한 Stein 염색에서 간세포질 내에서 담즙색소로 추정되는 녹색의 초자적이 관찰되었다. 갈변 위축 간 개체는 간세포의 용적이 줄어들어, 중심정맥 및 동양 모세혈관의 이완이 확인되었다. 그리고 갈변 위축 간이 육안적으로 갈색으로 관찰되나 광학현미경적 관찰결과 간세포질 내에 색소과립은 관찰되지 않았으며, 간세포의 경계가 명확하게 나타나지 않았다. 지방간 개체는 지방 소적의 축적으로 간세포에 다양한 크기의 둥근 지방 공포가 광범위하게 관찰되었으며, 지방소적으로 인해서 팽창된 간세포가 관찰되거나, 간세포핵의 변성이 관찰되었다. 본 연구 결과, 간의 육안적 관찰 및 조직학적 관찰 결과가 어체의 임상 질병으로 실질적인 발현을 진행하기 전에 중요한 건강 매개변수로 사용될 수 있을 것으로 판단되었다.

Keywords

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