Effect of Epigallocatechin-3-Gallate on PMA-Induced MUC5B Expression in Human Airway Epithelial Cells

Title
Effect of Epigallocatechin-3-Gallate on PMA-Induced MUC5B Expression in Human Airway Epithelial Cells
Author(s)
김용대송은정배창훈김종연김용운박소영송시연
Keywords
INDUCED MUCIN PRODUCTION; MUCUS HYPERSECRETION; GENE-EXPRESSION; MATRIX-METALLOPROTEINASE-9; ASTHMA; DOXYCYCLINE; MMP-9; EGCG
Issue Date
201312
Publisher
KOREAN SOC OTORHINOLARYNGOL
Citation
CLINICAL AND EXPERIMENTAL OTORHINOLARYNGOLOGY, v.6, no.4, pp.237 - 242
Abstract
Objectives. Among the inflammatory mediators, phorbol 12-myristate 13-acetate (PMA) is associated with the regulation of MUC5B expression in the airway epithelial cells. Epigallocatechin-3-gallate (EGCG) is the major component of green tea extract. The biological activity of EGCG includes reduction of cholesterol and antioxidant activity, as well as anti-inflammatory effect. However, the precise action mechanism of anti-inflammatory effect of EGCG in the airway epithelial cells has not been fully defined. This study investigates the effect and the brief signaling pathway of EGCG on PMA-induced MUC5B expression in the airway epithelial cells. Methods. In NCI-H292 airway epithelial cells, the effect and signaling pathway of EGCG on MUC5B expression were investigated using real-time polymerase chain reaction analysis, enzyme immunoassay, immunohistochemical analysis, gelatin zymography assay, and immunoblot analysis. Results. In NCI-H292 airway epithelial cells, PMA induced MUC5B expression, phosphorylation of p38 mitogen-activated protein kinase (MAPK), and matrix metalloproteinase-9 (MMP-9) expression and protein activity. EGCG significantly decreased PMA-induced MUC5B expression, phosphorylation of p38 MAPK, and MMP-9 expression and protein activity. SB203580 (p38 MAPK inhibitor) significantly decreased PMA-induced MMP-9 expression. In addition, SB203580 and MMP-9 I (MMP-9 inhibitor) significantly decreased PMA-induced MUC5B expression. Conclusion. These results suggest that EGCG down-regulates PMA-induced MUC5B expression through the p38 MAPK dependent MMP-9 signaling pathway in human airway epithelial cells.
URI
http://hdl.handle.net/YU.REPOSITORY/28259http://dx.doi.org/10.3342/ceo.2013.6.4.237
ISSN
1976-8710
Appears in Collections:
의과대학 > 이비인후과학교실 > Articles
의과대학 > 영상의학과학교실 > Articles
의과대학 > 생리학교실 > Articles
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