Inhibition of Proinflammatory Cytokine-induced Invasiveness of HT-29 Cells by Chitosan Oligosaccharide

  • Nam, Kyung-Soo (Department of Pharmacology, College of Medicine, Dongguk University) ;
  • Kim, Mee-Kyung (Intractable Disease Research Center, Dongguk University) ;
  • Shon, Yun-Hee (Intractable Disease Research Center, Dongguk University)
  • Published : 2007.12.31


The effect of chitosan oligosaccharide (COS, 1 kDa${\gamma}$, 10 ng/ml IL-$1{\alpha}$, and 25 ng/ml TNF-${\alpha}$) in HT-29 cells. Inducible nitric oxide synthase (iNOS) expression induced by these cytokines was inhibited by COS. COS pretreatment inhibited the invasiveness of cytokines-treated HT-29 cells through Matrigel-coated membrane in a dose-dependent manner. COS also inhibited cytokines-induced matrix metalloproteinase (MMP)-2 activity. This study shows that proinflammatory cytokines induce NO production, iNOS expression, and invasiveness of human colorectal adenocarcinoma HT-29 cells. COS pretreatment inhibited cytokines-mediated NO production, iNOS expression, and invasiveness of HT-29 cells. These results provide sufficient information for the further development of COS as an antitumor metastatic agent for the treatment of colon cancer.


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