Motorcycle exhaust particles augment antigen-induced airway inflammation in BALB/c mice

Chen Chen Lee, Yu Wen Cheng, Jiunn Wang Liao, Bor Luen Chiang, Yih Loong Lai, Jaw Jou Kang

研究成果: 雜誌貢獻文章

3 引文 斯高帕斯(Scopus)

摘要

Evidence indicates that environment pollutants from fossil fuel combustion compromise the immune system by enhancing allergic reactions and damaging the respiratory tract. This study was performed to investigate the effects of motorcycle exhaust particles (MEP), a major air pollutant especially in the urban areas of Taiwan, on allergen-induced airway inflammatory reactions in lab animals. BALB/c mice were intratracheally instilled with ovalbumin (OVA), MEP, or phosphate-buffered saline, 3 times every 2 wk. Airway hyperresponsiveness was measured in unrestrained mice by barometric plethsmography. Bronchoalveolar lavage fluid (BALF) and serum from treated animals were collected for cytokine and antibody determination by enzyme-linked immunosorbent assay (ELISA). Lung tissue stained with hematoxylin/eosin was examined. Data showed that MEP augmented OVA-induced airway inflammation; characterized by infiltration of eosinophils and neutrophils in BALF and lung tissue inflammation. The combination of OVA and MEP markedly increased interleukin-4 (IL-4), interleukin-5 (IL-5), and tumor necrosis factor-α (TNF-α) protein levels in BALF. In addition, MEP also augmented OVA-induced rise in OVA-specific immunoglobulin (Ig) G1 and IgE and airway hyperresponsiveness. Pretreated lavage cells with mitogen-activated protein kinase (MAPK) inhibitors showed that TNF-α release was significantly inhibited. This study found that MEP augmented antigen-induced allergic airway inflammation and airway hyperresponsiveness through a Th2-dominant pathway.
原文英語
頁(從 - 到)405-412
頁數8
期刊Journal of Toxicology and Environmental Health - Part A
71
發行號6
DOIs
出版狀態已發佈 - 一月 2008

ASJC Scopus subject areas

  • Toxicology
  • Health, Toxicology and Mutagenesis

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