We conducted this study to investigate whether berberine signifi cantly affects MUC5AC mucin gene expression and mucin production induced by epidermal growth factor (EGF), phorbol 12-myristate 13-acetate (PMA) or tumor necrosis factor-α (TNF-α) from human airway epithelial cells. Confl uent NCI-H292 cells were pretreated with varying concentrations of berberine for 30 min and then stimulated with EGF, PMA or TNF-α for 24 h. MUC5AC mucin gene expression and mucin production were measured by reverse transcription-polymerase chain reaction (RT-PCR) and enzyme-linked immunosorbent assay (ELISA), respectively. Berberine was found to inhibit the expression of MUC5AC mucin gene induced by EGF, PMA or TNF-α. Berberine also inhibited the production of MUC5AC mucin protein stimulated by the same inducers. This result suggests that berberine can regulate the expression of mucin gene and production of mucin protein, by directly acting on human airway epithelial cells.
Abstractber of reports, Coptis japonica Makino and its components, berberine, have been used to control airway allergic or infl ammatory diseases and reported to have anti-infl ammatory and anti-cancer effects (Yoo et al., 2008;Sun et al., 2009;Tang et al., 2009). On the other hand, it was previously reported that berberine stimulated basal mucin release from airway goblet cells, by our group . However, to the best of our knowledge, there are no reports about the effect of berberine on MUC5AC mucin gene expression and mucin production induced by epidermal growth factor (EGF), phorbol 12-myristate 13-acetate (PMA) or tumor necrosis factor-α (TNF-α), from human airway epithelial cells. Therefore, in this study, we investigated whether berberine affects the expression of MUC5AC mucin gene and the production of mucin protein induced by EGF, PMA or TNF-α, from the NCI-H292 human pulmonary mucoepidermoid cell line.