Immunomodulatory Effect of Pueraria lobata on the Functional Activation of Macrophages by Lipopolysaccharide Treatment

그람음성균 유래 lipopolysaccharide로 활성화된 대식세포의 기능 수행시 갈화 [Pueraria lobata (Willd.) Ohwi]의 조절작용

  • Shen, Ting (School of Bioscience and Biotechnology, Kangwon National University) ;
  • Kim, Jong-Dai (School of Bioscience and Biotechnology, Kangwon National University) ;
  • Cho, Jae-Youl (School of Bioscience and Biotechnology, Kangwon National University)
  • 센팅 (강원대학교 BT학부대학 생명공학부) ;
  • 김종대 (강원대학교 BT학부대학 생명공학부) ;
  • 조재열 (강원대학교 BT학부대학 생명공학부)
  • Published : 2009.02.28

Abstract

Pueraria lobata (Willd.) Ohwi was investigated to check its modulatory effects on the activation of macrophages upon inflammatory conditions treatment. For this purpose, we examined several inflammatory responses such as nitric oxide (NO) production, reactive oxygen species (ROS) generation, cytoprotection and phagocytosis under the treatment of methanol extract from P. lobata (Pl-ME). Pl-ME dose-dependently blocked NO production in lipopolysaccharide (LPS)- stimulated RAW264.7 cells but not sodium prusside (SNP)-generated NO release. The NO inhibition seemed to be due to blocking inducible NO synthase (iNOS), since Pl-ME suppressed its expression in a NF-${\kappa}B$-independent manner. Similarly, this extract also effectively protected RAW264.7 cells from LPS-induced cytotoxicity. However, Pl-ME did not block ROS generation and rather it enhanced. Finally, this extract negatively modulated FITC-dextran uptake. Therefore, our data suggested that Pl-ME may be involved in negatively regulating some macrophage-mediated inflammatory responses such as NO production and phagocytic uptake.

Keywords

References

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