Extracellular vesicles are key intercellular mediators in the development of immune dysfunction to allergens in the airways

T. S. Shin, J. H. Kim, Y. S. Kim, S. G. Jeon, Z. Zhu, Y. S. Gho, Y. K. Kim

Research output: Contribution to journalArticle

Abstract

Background: Previous evidence indicates that inhalation of lipopolysaccharide (LPS)-containing with allergens induced mixed Th1 and Th17 cell responses in the airways. Extracellular vesicles (EVs) are nanometer-sized spherical, lipid-bilayered structures and are recently in the public eye as an intercellular communicator in immune responses. Objective: To evaluate the role of EVs secreted by LPS inhalation in the development of airway immune dysfunction in response to allergens. Methods: Extracellular vesicles in bronchoalveolar lavage fluids of BALB/c mice were isolated and characterized 24 h after applications to the airway of 10 μg of LPS for 3 days. To evaluate the role of LPS-induced EVs on the development of airway immune dysfunction, in vivo and in vitro experiments were performed using the isolated LPS-induced EVs. Results: The inhalation of LPS enhanced EVs release into the BAL fluid, when compared to the application of PBS. Airway sensitization with allergens and LPS-induced EVs resulted in a mixed Th1 and Th17 cell responses, although that with allergens and PBS-induced EVs induced immune tolerance. In addition, LPS-induced EVs enhanced the production of Th1- and Th17-polarizing cytokines (IL-12p70 and IL-6, respectively) by lung dendritic cells. Moreover, the immune responses induced by the LPS-induced EVs were blocked by denaturation of the EV-bearing proteins. Conclusion: These data suggest that EVs (especially, the protein components) secreted by LPS inhalation are a key intercellular communicator in the development of airway immune dysfunction to inhaled LPS-containing allergens.

Original languageEnglish (US)
Pages (from-to)1256-1265
Number of pages10
JournalAllergy: European Journal of Allergy and Clinical Immunology
Volume65
Issue number10
DOIs
StatePublished - Oct 1 2010

Keywords

  • airway immune dysfunction
  • asthma
  • extracellular vesicles
  • lipopolysaccharide

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

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