Journal of Environmental Health Sciences (한국환경보건학회지)

Korean Society of Environmental Health (한국환경보건학회)
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Analysis of Pulmonary Surfactant after Intratracheal Instillation of SWNCT and MWCNT

SWCNT 및 MWCNT의 기관내 점적주입 후 폐 계면활성제의 분석

  • Lee, Byeongwoo (Risk Assessment Division, Environmental Health Research Department, National Institute of Environmental Research) ;
  • Seo, Jungkwan (Risk Assessment Division, Environmental Health Research Department, National Institute of Environmental Research) ;
  • Shim, Ilseob (Risk Assessment Division, Environmental Health Research Department, National Institute of Environmental Research) ;
  • Eom, Igchun (Risk Assessment Division, Environmental Health Research Department, National Institute of Environmental Research) ;
  • Kim, Plije (Risk Assessment Division, Environmental Health Research Department, National Institute of Environmental Research)
  • 이병우 (국립환경과학원 환경건강연구부 위해성평가연구과) ;
  • 서정관 (국립환경과학원 환경건강연구부 위해성평가연구과) ;
  • 심일섭 (국립환경과학원 환경건강연구부 위해성평가연구과) ;
  • 엄익춘 (국립환경과학원 환경건강연구부 위해성평가연구과) ;
  • 김필제 (국립환경과학원 환경건강연구부 위해성평가연구과)
  • Received : 2017.07.10
  • Accepted : 2017.08.01
  • Published : 2017.08.28
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Abstract

Objectives: Carbon nanotubes (CNTs) are next-generation industrial nanoparticles which possess excellent mechanical strength along with good thermal conductivity and electric properties. Given these characteristics, carbon nanotubes are being widely applied in various fields, including research and development. However, concerns have been raised over hazardous properties due to their similar fiber shape to asbestos. Recent studies have shown that CNTs pose potential hazards which may cause fibrosis and/or lung inflammation similarly to asbestos. Methods: After intratracheal instillation of SWCNTs and MWCNTs to rats, pulmonary surfactant (PS) of the SWCNTs and MWCNTs was measured and analyzed using bronchoalveolar lavage fluid collected from the lung. After a single intratracheal instillation of SWCNTs and MWCNTs, phospholipid predominantly showed a significant increase compared to the control group, while proteins exhibited a significant increase both three days and one week after instillation. Results: As a result of surface tension, MWCNTs showed a significant decrease three days after treatment compared to the control group. In the case of the total cell number three days after instillation, MWCNTs revealed a temporarily significant increase when compared to the control group. For PMN number, when compared to the control group, SWCNTs displayed a significant increase throughout the observation period, while MWCNTs showed a significant increase three days and three months after treatment. Conclusions: After exposure to CNTs, the total cell number and PNT number, which indicate inflammatory response, were significantly increased. Therefore, this study suggests fiber-shaped CNTs may have a harmful effect on the lungs.

Keywords

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