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Intercellular adhesion molecule-1 (ICAM-1) is associated with processes of inflammation. We investigated the effects of deoxypodophyllotoxin (DPT) on tumor necrosis factor-alpha (TNF-alpha) induced ICAM-1 expression in the mouse lung epithelial cell line, LA4. DPT (5 to 20 nM) inhibited TNF-alpha-induced ICAM-1 expression through nuclear factor-kappa B (NF-kappaB) in a dose-dependent manner and repressed ICAM-1 promoter activity. NF-kappaB reporter gene activity and DNA binding activity were also strongly inhibited. In addition, DPT inhibited degradation by the TNF-alpha induced inhibitory kappaB-alpha (IkappaB-alpha) in a concentration-dependent manner. Taken together with our previous results suggest DPT might provide a basis for novel anti-inflammatory drug development.

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Deoxypodophyllotoxin Inhibits the Expression of Intercellular Adhesion Molecule-1 Induced by Tumor Necrosis Factor-.ALPHA. in Murine Lung Epithelial Cells