Chemopreventive Effect of Saponins Derived from Roots of Platycodon grandiflorum on 4-(Methylnitrosamino)-1-(3-Pyridyl)-1-Butanone-Induced Lung Tumorigenesis in A/J Mice

  • Lee, Kyung-Jin (Department of Pharmacy, College of Pharmacy, Research Center for Proteineous Materials, Chosun University) ;
  • Shin, Dong-Weon (Department of Pharmacy, College of Pharmacy, Research Center for Proteineous Materials, Chosun University) ;
  • Chung, Young-Chul (Division of Food Science, Chinju International University) ;
  • Jeong, Hye-Gwang (Department of Pharmacy, College of Pharmacy, Research Center for Proteineous Materials, Chosun University)
  • Published : 2006.08.01

Abstract

This study examined the chemopreventive effect of saponins that were isolated from the roots of Platycodon grandiflorum A. DC (Campanulaceae), Changkil saponins (CKS), against the tobacco-specific carcinogen, 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK), -on lung tumorigenesis in A/J mice. The mice were treated with a single NNK dose (100 mg/kg b.w., i.p.). CKS (0.5, 1, 4 mg/kg body wt.) was administered orally daily for 3 days/week beginning 1 day after the NNK treatment and was maintained throughout the experiment. The administration of CKS suppressed the NNK-induced increase in the level of proliferating cell nuclear antigen, which are a marker of cell proliferation, in the lungs of the mice 4 weeks after the NNK injection. Twenty-five weeks after the NNK treatment, the mice were sacrificed and the number of surface lung tumors was measured. CKS significantly reduced the number of lung tumors induced by NNK in a dose dependent manner. These results suggest that CKS suppresses the development of lung tumors and has a chemopreventive effect against NNK-induced mouse lung tumorigenesis.

Keywords

References

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