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Related Experiment Videos

Persistent inflammation and hyperresponsiveness following viral rhinosinusitis.

James Joseph Klemens1, Kenneth Thompson, Alexander Langerman

  • 1Department of Surgery, Section of Otolaryngology-Head and Neck Surgery, University of Chicago, Chicago, IL 60637-1035, USA.

The Laryngoscope
|July 11, 2006
PubMed
Summary

This study developed a mouse model for viral rhinosinusitis using Sendai virus (SeV). SeV infection causes acute inflammation resolving within 10 days, followed by persistent T-cell changes and hyperresponsiveness to histamine.

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Area of Science:

  • Immunology
  • Virology
  • Otolaryngology

Background:

  • Viral infections can lead to rhinosinusitis.
  • Chronic rhinosinusitis (CRS) pathophysiology requires further investigation.
  • Murine models are crucial for studying complex diseases like CRS.

Purpose of the Study:

  • To establish a murine model of viral rhinosinusitis.
  • To investigate the immunological and physiological changes following viral inoculation.
  • To provide a platform for understanding CRS development after viral infection.

Main Methods:

  • Mice were intranasally inoculated with Sendai virus (SeV) or inactivated virus.
  • Viral cultures, flow cytometry of sinus mucosa, and histamine challenge tests were performed.
  • Immune cell populations (CD3, CD4, CD8, CD25, CD11b, CCR3, GR1) and nasal hyperresponsiveness were assessed.

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Main Results:

  • Sendai virus (SeV) infection was confirmed by positive viral cultures on day 3.
  • SeV inoculation led to increased macrophages and neutrophils in sinus mucosa on day 4, resolving by day 10.
  • Persistent increases in CD8+ and CD4+CD25+ T cells were observed at day 38, correlating with heightened nasal hyperresponsiveness to histamine.

Conclusions:

  • Sendai virus (SeV) induces an acute, self-limiting viral rhinosinusitis in mice.
  • A persistent increase in T-suppressor and T-regulatory cells occurs post-infection, linked to histamine hyperresponsiveness.
  • This murine model mimics aspects of human chronic rhinosinusitis after viral infection, aiding pathophysiology studies.