Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Changes in the Concentration and Localization of Accumulated Mercury in Kidney, Liver, and Spleen of Mice over Time

생쥐 신장, 간, 비장 내 시간에 따른 수은 농도 변화와 수은 화합물의 위치

  • Kim, Yu Seon (Department of Biology, College of Life Science and Natural Resources, Sunchon National University) ;
  • Kim, Young Eun (Department of Biology, College of Life Science and Natural Resources, Sunchon National University) ;
  • Cho, Hyun Wook (Department of Biology, College of Life Science and Natural Resources, Sunchon National University)
  • 김유선 (순천대학교 생명산업과학대학 생물학과) ;
  • 김영은 (순천대학교 생명산업과학대학 생물학과) ;
  • 조현욱 (순천대학교 생명산업과학대학 생물학과)
  • Received : 2019.04.23
  • Accepted : 2019.08.07
  • Published : 2019.08.30
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Abstract

This study investigated the localization and changes in the concentration of injected mercury in the kidney, liver, and spleen of mice. To evaluate changes in the concentration of mercury over time, the mice were euthanized 10, 150, and 300 days post-treatment. Localization of accumulated mercury was identified by the autometallography method. Mercury was densely located in the supranuclear cytoplasm of epithelial cells of proximal tubules of the kidney but was not detected in the glomerulus 10 days post-treatment. In the liver, mercury was mainly found in hepatocytes around the portal vein and in sinusoidal Kupffer cells 10 days post-treatment. Mercury was scattered throughout both white and red pulp of the spleen 10 days post-treatment. In terms of changes in the concentration of mercury, the levels were lower in the renal cortex and medulla 150 and 300 days post-treatment as compared with those 10 days post-treatment. Mercury was found at low concentrations in liver hepatocytes 150 and 300 days post-treatment. The mercury concentration was also low in both the white and red pulp of the spleen 150 and 300 days post-treatment. Therefore, the concentrations of accumulated mercury in the kidney, liver, and spleen 150 and 300 days post-treatment were lower than those 10 days post-treatment. We identified the localization of mercury in cells and tissues of several organs and observed that accumulated mercury in organs decreased naturally over time.

본 연구에서는 생쥐 신장, 간, 비장 내 축적된 수은의 위치와 아울러서 시간에 따른 수은 농도 변화를 조사하였다. 수은 투여 종료 후 10일, 150일, 300일에 생쥐를 희생하여 수은 농도변화를 분석하였다. 10일에 희생시킨 생쥐 신장의 경우, 근위세뇨관 상피세포의 핵 위쪽 세포질에 수은이 다량으로 분포하였으나, 사구체에는 분포하지 않았다. 간의 경우, 수은이 주로 간문맥 주위에 있는 간세포와 굴모세혈관에 있는 Kupffer 세포에 분포하였다. 10일에 희생시킨 비장의 경우, 백색 수질과 적색 수질에 수은이 흩어져 분포하였다. 수은의 농도 변화에 있어서, 150일과 300일에 희생시킨 신장의 피질과 수질에 축적되어 있던 수은이 낮은 농도로 나타났다. 역시 간세포에 축적되어 있던 수은도 150일과 300일의 경우, 낮은 농도로 나타났다. 비장의 경우, 백수와 적수 조직에 있던 수은 농도가 감소되었다. 이런 결과를 통해 세포나 조직에 축적되어 있던 수은의 위치가 확인되었으며, 또한 이 결과는 기관에 축적되어 있던 수은 농도가 시간이 지남에 따라 자연스럽게 감소된다는 사실을 확인해 주고 있다.

Keywords

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