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Interleukin-1으로 유도된 급성폐손상에서 rutin의 효과

Rutin Ameliorates Neutrophilic Oxidative Stress-Induced Acute Lung Injury by Intratracheal IL-1 Insufflation in Rats

  • 권성철 (대구가톨릭대학교 의과대학 생리학교실) ;
  • 박윤엽 (대구가톨릭대학교 의과대학 생리학교실) ;
  • 이영만 (대구가톨릭대학교 의과대학 생리학교실)
  • Kwon, Sung-Chul (Department of Physiology, School of Medicine, Catholic University of Daegu) ;
  • Park, Yoon-Yub (Department of Physiology, School of Medicine, Catholic University of Daegu) ;
  • Lee, Young-Man (Department of Physiology, School of Medicine, Catholic University of Daegu)
  • 투고 : 2010.01.11
  • 심사 : 2010.03.29
  • 발행 : 2010.04.30

초록

흰쥐에서 Interleukin-1 (IL-1)으로 유도된 급성폐손상에서의 group II phospholipase $A_2$ ($PLA_2$) 억제제인 rutin의 효과를 알아보기 위하여 본 연구를 시행하였다. Rutin은 IL-1에 의해 증가한 폐장내의 myeloperoxidase의 활성도를 감소시키지는 못하였으나 폐포세척액 내의 호중구의 수 및 모세혈관의 손상지표로 알려져 있는 폐장 모세혈관에서의 단백질 누출양을 감소시켰다. 동시에 rutin은 IL-1에 의하여 증가한 폐장의 염증조절효소인 $PLA_2$의 활성도를 감소시키고 결과적으로 호중구에서의 산소기의 생성을 감소시켰다. Rutin 뿐만 아니라 manoalide, scalaradial 같은 group II $PLA_2$의 억제제도 호중구의 respiratory burst를 감소시킴을 확인하였다. IL-1에 의하여 증가한 폐포세척액 내에서의 cytokine induced neutrophil chemoattractant의 농도는 rutin에 의해 영향을 받지 않았다. 형태학적으로는 IL-1에 의한 폐장조직에서의 산소기의 형성이 관찰되었고 rutin은 이러한 산소기의 생성을 현저히 감소시켰다. 이러한 결과로 미루어 group II $PLA_2$ 억제제인 rutin은 호중구에서의 활성 산소기의 생성을 효과적으로 억제함으로써 IL-1에 의한 급성폐손상의 감소를 가져 오는 것으로 결론지을 수 있다.

Rutin, a group II phospholipase $A_2$ ($PLA_2$) inhibitor, was tested on interleukin-1 (IL-1) induced acute lung injury (ALI) in male Sprague-Dawley rats. Rutin did not alter the increased lung myeloperoxidase activity by IL-1. However, the number of neutrophils in bronchoalveolar lavage fluid (BALF) and IL-1 induced lung leak were decreased by rutin (p<0.001). Simultaneously, rutin decreased lung $PLA_2$ activity, which was increased by IL-1 (p<0.001). The reduction of neutrophilic respiratory burst by the inhibition of $PLA_2$ was confirmed by group II $PLA_2$ inhibitors such as rutin, manoalide and scalaradial. The increased level of cytokine-induced neutrophilic chemoattractant (CINC) in BALF by IL-1 was not affected by rutin. Ultrastructural changes of ALI and increased generation of free radicals in the lung by IL-1 were found, and rutin ameliorated these pathological findings. Taken together, rutin seems to be effective in decreasing IL-1 induced ALI through inhibition of group II $PLA_2$.

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참고문헌

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