Phorbol 12-Myristate 13-Acetate Induces MUC16 Expression via PKC delta and p38 in Human Airway Epithelial Cells

Title
Phorbol 12-Myristate 13-Acetate Induces MUC16 Expression via PKC delta and p38 in Human Airway Epithelial Cells
Author(s)
김용대배창훈김학수[김학수]송시연
Keywords
MEMBRANE-BOUND MUCINS; GENE-EXPRESSION; TETHERED MUCINS; OCULAR SURFACE; PROTEIN; MECHANISM; PATHWAY; ERK
Issue Date
201209
Publisher
KOREAN SOC OTORHINOLARYNGOL
Citation
CLINICAL AND EXPERIMENTAL OTORHINOLARYNGOLOGY, v.5, no.3, pp.161 - 169
Abstract
Objectives. Phorbol 12-myristate 13-acetate (PMA) is widely used as a protein kinase C (PKC) activator, PKC is involved in the secretion of mucins. MUC16, one of the membrane-bound mucins, is produced in human airway epithelial cells. However, the effect and signaling pathway of PMA on MUC16 expression in human airway epithelial cells has not been reported. Therefore, the effect and brief signaling pathway of PMA on MUC16 expression were investigated in human airway epithelial cells in this study. Methods. hi the mucin-producing human NCI-H292 airway epithelial cells and the primary cultures of normal nasal epithelial cells, the effect and signaling pathway of PMA on MUC16 expression were investigated using reverse transcriptase-polymerase chain reaction (RT-PCR), real-time PCR, enzyme immunoassay, and immunoblot analysis with several specific inhibitors and small interfering RNA (siRNA) for p38 mitogen-activated protein kinase (MAPK). Results. PMA increased MUC16 expression, and activated phosphorylation of p38 MAPK. However, it did not activate phosphorylation of extracellular signal-regulated kinase 1/2 (ERK1/2). SB203580 (p38 MAPK inhibitor) inhibited PMA-induced MUC16 expression, while U0126 (ERK1/2 inhibitor) did not. In addition, the knockdown of p38 MAPK by p38 MAPK siRNA significantly blocked PMA-induced MUC16 mRNA expression. Rottlerin (PKC delta inhibitor) inhibited PMA-induced MUC16 expression, and also inhibited the phosphorylation of activated p38 MAPK by PMA. Conclusion. These results show for the first time that PMA-induced MUC16 expression is regulated by activation of the PKG delta and p38 MAPK signaling pathway in human airway epithelial cells.
URI
http://hdl.handle.net/YU.REPOSITORY/27329http://dx.doi.org/10.3342/ceo.2012.5.3.161
ISSN
1976-8710
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의과대학 > 이비인후과학교실 > Articles
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