These two authors equally contributed to this work.
Inhibition of TNF-α-Induced MUC5AC Mucin Gene Expression and Production by Wogonin Through the Inactivation of NF-κB Signaling in Airway Epithelial Cells
Article first published online: 6 MAR 2013
Copyright © 2013 John Wiley & Sons, Ltd.
Volume 28, Issue 1, pages 62–68, January 2014
How to Cite
Sikder, Md. A., Lee, H. J., Mia, Md. Z., Park, S. H., Ryu, J., Kim, J.-H., Min, S. Y., Hong, J.-H., Seok, J. H. and Lee, C. J. (2014), Inhibition of TNF-α-Induced MUC5AC Mucin Gene Expression and Production by Wogonin Through the Inactivation of NF-κB Signaling in Airway Epithelial Cells. Phytother. Res., 28: 62–68. doi: 10.1002/ptr.4954
- Issue published online: 7 JAN 2014
- Article first published online: 6 MAR 2013
- Manuscript Accepted: 1 FEB 2013
- Manuscript Revised: 22 JAN 2013
- Manuscript Received: 14 NOV 2012
- airway mucin;
In this study, we investigated whether wogonin significantly affects MUC5AC mucin gene expression and production in human airway epithelial cells. Confluent NCI-H292 cells were pretreated with wogonin for 30 min and then stimulated with tumor necrosis factor-α (TNF-α) for 24 h or the indicated periods. The MUC5AC mucin gene expression and mucin protein production were measured by RT-PCR and ELISA, respectively. We found that incubation of NCI-H292 cells with wogonin significantly inhibited mucin production and down-regulated MUC5AC gene expression induced by TNF-α in a dose-dependent fashion. To elucidate the action mechanism of wogonin, effect of wogonin on TNF-α-induced NF-κB signaling pathway was investigated by western blot analysis. Wogonin inhibited NF-κB activation induced by TNF-α. Inhibition of IKK by wogonin led to the suppression of IκB phosphorylation and degradation, p65 nuclear translocation and NF-κB-regulated gene expression. This, in turn, led to the down-regulation of MUC5AC protein production in NCI-H292 cells. Wogonin also inhibited the gene products involved in cell survival (Bcl-2) and proliferation (cyclooxygenase-2). These results suggest that wogonin inhibits the NF-κB signaling pathway, which may explain its role in the inhibition of MUC5AC mucin gene expression and production. Copyright © 2013 John Wiley & Sons, Ltd.