Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
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The Effects of Selenium on Cadmium-Induced Toxicity and Lipid Peroxidation in Rat Hepatocyte Primary Culture

랫드 간세포 일차배양에서 셀레늄이 카드뮴에 의해 유도된 독성 및 지질과산화에 미치는 영향

  • Rhim, Tae-Jin (Department of Biotechnology, College of Life Science and Natural Resources, Sangji University)
  • 임태진 (상지대학교 생명자원과학대학 생명공학과)
  • Published : 2003.06.30
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Abstract

The objective of present study was to investigate the antioxidative and hepatoprotective effects of selenium on cadmium-induced toxicity and lipid peroxidation in rat hepatocyte primary culture. To do this, two separate experiments were conducted. In Experiment 1, primary cultures of rat hepatocytes were incubated for 6 hr in the presence of various concentrations (1, 10, 50, 100, and $500\;{\mu}M$) of cadmium chloride. Cytotoxicity and lipid peroxidation were evaluated using the MTT assay and TBARS assay, respectively. Antioxidative and hepatoprotective effects were determined by measuring the activity of GOT and GSH-Px, respectively. Cell viability was reduced and lipid peroxidation was increased by cadmium in dose-dependent manners. There was significantly negative correlation (r=-0.943, p<0.01) between cell viability and lipid peroxidation GOT activity was increased and GSH-Px activity was decreased by cadmium at the concentration of $50\;{\mu}M$. In Experiment 2, primary cultures of rat hepatocytes were incubated for 6hr in the presence of 100\;{\mu}M$ of cadmium chloride and various concentrations (0.01, 0.1 and 1 ppm) of sodium selenite to assess the effect of selenium on cadmium-induced toxicity and lipid peroxidation. Cell viability and GSH-Px activity were increased by sodium selenite at the concentration of 1 ppm Whereas, lipid peroxidation and GOT activity were reduced by 0.1 ppm of sodium selenite. These results demonstrate that selenium has an antioxidative and hepatoprotective potentials against cadmium.

본 연구의 목적은 랫드 간세포 일차배양에서 카드뮴에 의해 유발된 세포독성 및 지질과산화에 대한 셀레늄의 항산화 및 간보호 효과를 조사하기 위함이다. 이를 위해 2개의 실험을 수행하였다. 실험 1에서는, 1, 10, 50, 100 및 $50\;{\mu}M$의 다양한 농도의 카드뮴으로 6시간 동안 간세포를 일차 배양하였다. 간세포 생존율과 지질과산화는 각각 MTT 방법과 TBARS 방법으로 측정하였다. 항산화 효과와 간보호 효과는 각각 GOT와 GSH-Px 활성을 측정함으로써 결정하였다. 카드뮴은 농도 의존적으로 세포 생존율을 감소시켰으며 지질과산화는 증가시켰다. 세포 생존율과 지질과산화 간에 유의적인 음의 상관관계(r=-0.943, p<0.01)가 관찰되었다. 카드뮴은 $50\;{\mu}M$ 농도에서 GOT의 활성을 증가시켰으나 GSH-Px의 활성은 감소시켰다. 실험 2에서는 셀레늄이 카드뮴에 의해 유발된 독성 및 지질과산화에 대한 효과를 연구하기 위해 $100\;{\mu}M$의 카드뮴과 0.01, 0.1 및 1 ppm의 다양한 농도의 셀레늄으로 6시간 동안 간세포 일차 배양하였다. 세포 생존율과 GSH-Px의 활성은 1 ppm의 셀레늄에 의해 증가되었다. 반면에, 지질과산화와 GOT의 활성은 0.1 ppm의 셀레늄에 의해 감소되었다. 이러한 연구 결과는 셀레늄이 카드뮴에 대한 항산화 및 보호 효과를 나타내 보이고 있다.

Keywords

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