Archives of Environmental Contamination and Toxicology

, Volume 55, Issue 3, pp 348–357

The Effects of Microbial Materials Adhered to Asian Sand Dust on Allergic Lung Inflammation

  • T. Ichinose
  • S. Yoshida
  • K. Hiyoshi
  • K. Sadakane
  • H. Takano
  • M. Nishikawa
  • I. Mori
  • R. Yanagisawa
  • H. Kawazato
  • A. Yasuda
  • T. Shibamoto
Article

DOI: 10.1007/s00244-007-9128-8

Cite this article as:
Ichinose, T., Yoshida, S., Hiyoshi, K. et al. Arch Environ Contam Toxicol (2008) 55: 348. doi:10.1007/s00244-007-9128-8

Abstract

Asian sand dust (ASD) containing microbiological materials, sulfate (SO42), and nitrate (NO3) derived from air pollutants in East China, reportedly cause adverse respiratory health effects. ASD aggravates ovalbumin (OVA)-associated experimental lung eosinophilia. In this study, the toxic materials adsorbed onto ASD were excluded by heat treatment at 360°C for 30 min. The effects of nonheated ASD or heated ASD (H-ASD) toward the allergic lung inflammation were compared in murine lungs. ICR mice were administered intratracheally with normal saline (control), H-ASD, ASD, OVA, OVA + H-ASD, and OVA + ASD, four times at 2-week intervals. ASD only increased neutrophils in bronchoalveolar lavage fluids (BALFs) along with pro-inflammatory mediators, such as keratinocyte chemoattractant (KC). H-ASD and ASD enhanced eosinophil recruitment induced by OVA in the alveoli and in the submucosa of the airway, which has a goblet cell proliferation in the bronchial epithelium. The two ASDs synergistically increased interleukin-5 (IL-5), monocyte chemotactic protein-3 (MCP-3), and eotaxin, which were associated with OVA, in BALF. The enhancing effects were much greater in ASD than in H-ASD. The two ASDs induced the adjuvant effects to specific IgE and IgG1 production by OVA. In the in vitro study using RAW264.7 cells, ASD increased the expression of Toll-like receptor 2 (TLR 2) mRNA but not TLR4 mRNA. H-ASD caused no expression of either TLR mRNA. These results suggest that the aggravated lung eosinophilia by ASD may be due to activation of Th2-associated immune response via the activation of TLR2 by microbial components adhered to ASD.

Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • T. Ichinose
    • 1
  • S. Yoshida
    • 1
  • K. Hiyoshi
    • 1
  • K. Sadakane
    • 1
  • H. Takano
    • 2
  • M. Nishikawa
    • 3
  • I. Mori
    • 3
  • R. Yanagisawa
    • 2
  • H. Kawazato
    • 4
  • A. Yasuda
    • 4
  • T. Shibamoto
    • 5
  1. 1.Department of Health SciencesOita University of Nursing and Health SciencesNotsuharuJapan
  2. 2.Pathophysiology Research TeamNational Institute for Environmental StudiesTsukubaJapan
  3. 3.Environmental Chemistry DivisionNational Institute for Environmental StudiesTsukubaJapan
  4. 4.Faculty of MedicineOita UniversityHasama-machiJapan
  5. 5.Department of Environmental ToxicologyUniversity of CaliforniaDavisUSA