Peroxisome proliferator-activated receptor-γ inhibits cigarette smoke solution-induced mucin production in human airway epithelial (NCI-H292) cells

Sung Yong Lee, Eun Joo Kang, Gyu Young Hur, Hwan Jung Ki, Cheol Jung Hye, Sang Yeub Lee, Je Hyeong Kim, Chol Shin, Kwang Ho In, Ho Kang Kyung, Hwa Yoo Se, Jae Jeong Shim

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

The main etiologic factor for chronic bronchitis is cigarette smoke. Exposure to cigarette smoke is reported to induce goblet cell hyperplasia and mucus production. Mucin synthesis in airways has been reported to be regulated by the EGFR system. Peroxisome proliferator-activated receptor-γ (PPAR-γ) is a member of the ligand-activated nuclear receptor superfamily. PPAR-γ is implicated in anti-inflammatory responses, but mechanisms underlying these varied roles remain ill-defined. Recently, reports have shown that upregulation of phosphatase and tensin homolog deleted on chromosome 10 (PTEN) might be one of the mechanisms through which PPAR-γ agonists exert their anti-inflammatory actions. However, no data are available on the role of PPAR-γ in smoke-induced mucin production. In this study, we investigated the effect of PPAR-γ agonist (rosiglitazone) on smoke-induced mucin production in NCI-H292 cells. Exposure to cigarette smoke causes a significant decrease in PTEN expression and increases dose-dependent EGFR-specific tyrosine phosphorylation, resulting in MUC5AC mucin production in NCI-H292 cells. PPAR-γ agonists or specific inhibitors of phosphoinositide 3-kinase exert inhibition of cigarette smoke-induced mucin production, with the upregulation of PTEN signaling and downregulation of Akt expression. This study demonstrates that PPAR-γ agonist functions as a regulator of epithelial cell inflammation that may result in reduction of mucin-producing cells in airway epithelium.

Original languageEnglish
JournalAmerican Journal of Physiology - Lung Cellular and Molecular Physiology
Volume291
Issue number1
DOIs
Publication statusPublished - 2006 Jul 12

Keywords

  • Epidermal growth factor receptor
  • Phosphatase and tensin homolog deleted on chromosome 10
  • Rosiglitazone
  • Smoking

ASJC Scopus subject areas

  • Cell Biology
  • Physiology
  • Pulmonary and Respiratory Medicine

Fingerprint Dive into the research topics of 'Peroxisome proliferator-activated receptor-γ inhibits cigarette smoke solution-induced mucin production in human airway epithelial (NCI-H292) cells'. Together they form a unique fingerprint.

  • Cite this