Prevention of Influenza Virus-Induced Immunopathology by TGF-β Produced during Allergic Asthma

PLoS Pathog. 2015 Sep 25;11(9):e1005180. doi: 10.1371/journal.ppat.1005180. eCollection 2015 Sep.

Abstract

Asthma is believed to be a risk factor for influenza infection, however little experimental evidence exists to directly demonstrate the impact of asthma on susceptibility to influenza infection. Using a mouse model, we now report that asthmatic mice are actually significantly more resistant to a lethal influenza virus challenge. Notably, the observed increased resistance was not attributable to enhanced viral clearance, but instead, was due to reduced lung inflammation. Asthmatic mice exhibited a significantly reduced cytokine storm, as well as reduced total protein levels and cytotoxicity in the airways, indicators of decreased tissue injury. Further, asthmatic mice had significantly increased levels of TGF-β1 and the heightened resistance of asthmatic mice was abrogated in the absence of TGF-β receptor II. We conclude that a transient increase in TGF-β expression following acute asthma can induce protection against influenza-induced immunopathology.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Asthma / complications
  • Asthma / immunology*
  • Disease Models, Animal
  • Enzyme-Linked Immunosorbent Assay
  • Flow Cytometry
  • Hypersensitivity / complications
  • Hypersensitivity / immunology*
  • Influenza A virus
  • Mice
  • Mice, Inbred BALB C
  • Mice, Inbred C57BL
  • Mice, Knockout
  • Orthomyxoviridae Infections / complications*
  • Orthomyxoviridae Infections / immunology*
  • Transforming Growth Factor beta1 / biosynthesis
  • Transforming Growth Factor beta1 / immunology*

Substances

  • Transforming Growth Factor beta1