Applied Microscopy

Korean Society of Microscopy (한국현미경학회)
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Effects of Chitosanoligosaccharide on the Mouse Hepatotoxicity Induced by Cadmium

카드뮴으로 유발된 생쥐 간독성에 대한 키토산올리고당의 효과

  • Yoon, Jung-Sik (Department of Biological Sciences, College of Natural Sciences, Chosun University) ;
  • Roh, Young-Bok (Department of Biological Sciences, College of Natural Sciences, Chosun University)
  • 윤중식 (조선대학교 자연과학대학 생물과학부) ;
  • 노영복 (조선대학교 자연과학대학 생물과학부)
  • Published : 2002.12.01
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Abstract

This research was conducted to determine the effects of chitosanoligosaccharide on liver poisoning induced by cadmium (Cd). Three groups of mice were used in this research. The group was only injected with cadmium (5.0 mg/kg; i.p.) (group Cd) and the other group was injected with cadmium and chitosanoligosaccharide (0.5% solution) at the same time (group Cd+Chi). In order to investigate the inhibitory action of chitosanoligosaccharide on liver damage, cadmium concentration in liver tissues and metallothionein (MT) concentration were relatively measured. In addition, histological observations were made to determine the morphologic injury of liver tissues. Cadmium concentration in liver tissues was drastically lower in groups Cd+Chi than in group Cd. MT concentration in liver tissues was lower in group Cd than in groups Cd+Chi. As the result of electron microscopic observation, mitochondria in group Cd showed a severe swelling phenomenon, RER fragment and ribosome dropout. However, in groups Cd+Chi, mitochondria with high electron density were distributed and RER forming a typical lamellae with ribosome was observed. From these results, cadmium toxicity on rat liver tissues could be lessened by chitosanoligosaccharide.

본 연구는 카드뮴으로 유발된 생쥐 간중독에 대한 키토산올리고당의 효과를 알아보기 위하여 시도되었다. Mouse를 대상으로 카드뮴 (5.0 mg/kg; i.p.) 단독투여군(group Cd), 카드뮴과 키토산올리고당 (0.5% solution) 동시투여군 (group Cd+Chi)으로 구분한 후 간손상 억제효과를 알아보기 위해 간조직 중의 카드뮴 농도와 metallothionein 농도를 비교측정하였다. 또한 간조직의 형태학적 손상을 확인하기 위해 조직학적 관찰을 실시하였다. 간조직의 카드뮴 농도는 Cd군에 비해 Cd+Chi군에서 현저하게 낮게 나타났다. 간조직의 MT 농도는 Cd군이 Cd+Chi군에 비해서 낮게 나타났다. 전자현미경적 관찰 결과, Cd군에서 미토콘드리아는 심한 팽윤현상이 나타났으며, RER의 분절과 리보조옴 탈락이 관찰되었다. 그러나 Cd+Chi군에서는 전자밀도가 높은 다양한 형태의 미토콘드리아가 분포되어 있었으며, 리보조옴이 부착된 채로 전형적인 층판구조를 형성한 RER이 관찰되었다. 이상과 같은 결과로, 키토산올리고당이 생쥐 간조직에 미치는 카드뮴의 독성을 감소시킴을 알 수 있었다.

Keywords

References

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