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서로 다른 물리화학적 특성을 갖는 탄소나노튜브(CNT)의 생물학적 독성 분석

Toxicity Analysis of Carbon Nanotubes Based on Their Physicochemical Properties

  • 김수남 (한국화학연구원 부설 안전성평가연구소) ;
  • 강민성 (한국화학연구원 부설 안전성평가연구소) ;
  • 한영아 (한국화학연구원 부설 안전성평가연구소) ;
  • 김재환 (한국화학연구원 부설 안전성평가연구소) ;
  • 노진규 (광운대학교 화학공학과) ;
  • 김영훈 (광운대학교 화학공학과) ;
  • 최상돈 (아주대학교 분자과학기술학과) ;
  • 박은정 (아주대학교 분자과학기술학과)
  • Kim, Soo-Nam (Inhalation Toxicology Center, KIT Jeongeup Campus) ;
  • Kang, Min-Sung (Inhalation Toxicology Center, KIT Jeongeup Campus) ;
  • Han, Young-Ah (Inhalation Toxicology Center, KIT Jeongeup Campus) ;
  • Kim, Jae-Hwan (Inhalation Toxicology Center, KIT Jeongeup Campus) ;
  • Roh, Jin-Kyu (Department of Chemical Engineering, Kwangwoon University) ;
  • Kim, Young-Hun (Department of Chemical Engineering, Kwangwoon University) ;
  • Choi, Sang-Dun (Department of Molecular Science and Technology, Ajou University) ;
  • Park, Eun-Jung (Department of Molecular Science and Technology, Ajou University)
  • 투고 : 2011.07.14
  • 심사 : 2011.09.18
  • 발행 : 2011.09.30

초록

제조나노물질은 원료물질이 동일하더라도 제조방법에 따라 최종생산물의 물리화학적 특성은 매우 상이해질 수 있고 더불어 독성 또한 크게 달라질 수 있을 것으로 추정되고 있다. 본 연구에서 우리는 2종의 탄소나노튜브(단층벽 탄소나노튜브 및 다층벽 탄소나노튜브)를 마우스에 경구와 경기관지로 처리한 후 체중당 상대무게 및 염증반응 지표를 조사함으로써 길이와 전기전도성에 따른 독성을 동정하였다. 실험 결과, 다층벽 탄소나노튜브의 경우 체중 감소는 길이가 짧은 그룹에서 더 강하게 관찰된 반면, 염증 반응은 비교적 길이가 긴 그룹에서 더 강하게 유도되었다. 경기관지로 처리된 단층벽 탄소나노튜브는 뇌와 신장의 상대무게를 의미있게 감소시켰고, 기관지 세척액과 혈액 내 면역세포의 의미있는 변화는 처리 후 1일과 7일에서 주로 관찰되었다. 이 결과를 통해 길이, 입경, 층벽의 수와 같은 탄소나노튜브의 물리화학적 특성이 물질에 의한 독성과 염증 반응에 매우 중요한 인자로 작용하고 있음을 확인할 수 있었다.

The physicochemical properties of manufactured nanomaterials can vary depending upon the methods of manufacture, although the utilized raw materials are same. Hence, the toxicity can also vary based on the methods of nanomaterials manufacture. In this study, we compared the toxicity effect of two types of CNTs (MWCNT, multi-walled carbon nanotube; SWCNT, single-walled carbon nanotube) that differ in length and wall number. In case of MWCNTs, inflammatory responses were more strongly induced in longer groups, whereas body weights more clearly decreased in shorter groups. SWCNT significantly decreased the relative weights of brain and kidney, and the inflow of immune cells and the hematological changes were observed significantly on day 1 and day 7 after exposure, respectively. Our results showed that the length and wall number of CNTs can serve as critical factors in the exhibited inflammation and toxicity.

키워드

참고문헌

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