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Morphine compromises bronchial epithelial TLR2/IL17R signaling crosstalk, necessary for lung IL17 homeostasis

Santanu Banerjee1, Jana Ninkovic1, Jingjing Meng2

  • 1Surgery, Basic and Translational Research, University of Minnesota, 515 Delaware St SE, Minneapolis, MN, USA.

Scientific Reports
|June 16, 2015
PubMed

Insights

Morphine disrupts protective lung inflammation by inhibiting IL-17 release, impairing pathogen clearance. Targeting TLR2 or IL-17 pathways may restore immune balance during chronic morphine use.

Area of Science:

  • Immunology
  • Pulmonology
  • Pharmacology

Background:

  • Chronic morphine use is linked to opportunistic lung infections and inflammation.
  • Interleukin-17 (IL-17) from bronchial epithelium is a key early defense against lung pathogens.
  • Toll-like receptor 2 (TLR2) activation in immune cells contributes to this protective response.

Purpose of the Study:

  • To investigate the mechanism by which morphine affects IL-17-mediated lung inflammation.
  • To explore the interaction between TLR2 and IL-17 receptor (IL-17R) signaling in bronchial epithelium.
  • To identify potential therapeutic targets for mitigating morphine-induced lung inflammation.

Main Methods:

  • Investigated the role of IL-17 induction in bronchial epithelium following pathogenic encounters.
  • Examined the interplay between TLR2 and IL-17R signaling pathways.
  • Assessed the effect of morphine on IL-17 release and adapter protein interactions (MyD88, Act1/CIKS).

Main Results:

  • Early IL-17 induction by bronchial epithelium is crucial for pathogen clearance.
  • Concurrent TLR2 and IL-17R activation leads to MyD88 sequestration by Act1/CIKS, resolving inflammation.
  • Morphine inhibits early IL-17 release and Act1-MyD88 interaction, impairing pathogen clearance and causing sustained inflammation.

Conclusions:

  • Morphine disrupts the natural resolution of lung inflammation by interfering with TLR2 and IL-17 signaling.
  • Therapeutic targeting of TLR2 or IL-17 in bronchial epithelia could restore inflammatory homeostasis in morphine users.
  • This research offers insights into managing lung complications associated with chronic morphine use.

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