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  • Title: Inhibition of airway MUC5AC mucin production and gene expression induced by epidermal growth factor or phorbol ester by glycyrrhizin and carbenoxolone.
    Author: Lee HJ, Lee SY, Bae HS, Kim JH, Chang GT, Seok JH, Lee CJ.
    Journal: Phytomedicine; 2011 Jun 15; 18(8-9):743-7. PubMed ID: 21146382.
    Abstract:
    BACKGROUND AND AIM: In this study, we investigated whether glycyrrhizin and carbenoxolone affect MUC5AC mucin production and gene expression induced by epidermal growth factor (EGF) or phorbol ester (PMA) from human airway epithelial cells. METHODS: Confluent NCI-H292 cells were pretreated with each agent for 30 min and then stimulated with EGF and PMA for 24h, respectively. MUC5AC mucin gene expression and mucin protein production were measured by RT-PCR and ELISA. RESULTS: Glycyrrhizin and carbenoxolone were found to inhibit the production of MUC5AC mucin protein induced by EGF or PMA, and both compounds also inhibited the expression of MUC5AC mucin gene induced by EGF or PMA. CONCLUSION: These results suggest that glycyrrhizin and carbenoxolone can inhibit mucin gene expression and production of mucin protein, by directly acting on airway epithelial cells.
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