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Related Experiment Videos

Asthma, viruses, and nitric oxide.

S P Sanders1

  • 1Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA. ssanders@welchlink.welch.jhu.edu

Proceedings of the Society for Experimental Biology and Medicine. Society for Experimental Biology and Medicine (New York, N.Y.)
|April 8, 1999
PubMed
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Viral infections like rhinovirus can worsen asthma by increasing airway inflammation and eosinophils. Nitric oxide may offer a new treatment to reduce these viral-induced asthma exacerbations.

Area of Science:

  • Respiratory Medicine
  • Immunology
  • Virology

Background:

  • Asthma morbidity and mortality have increased globally.
  • Upper respiratory viral infections, especially rhinovirus, are linked to asthma exacerbations.
  • Viral infections trigger airway inflammation via proinflammatory cytokines.

Purpose of the Study:

  • To explore the association between viral infections and asthma exacerbations.
  • To investigate the role of inflammatory cells and cytokines in virally induced airway hyperresponsiveness.
  • To evaluate nitric oxide's potential therapeutic role in managing viral asthma exacerbations.

Main Methods:

  • Review of existing evidence on viral infections and asthma.
  • Analysis of inflammatory cell recruitment and cytokine production in response to viral infections.

Related Experiment Videos

  • Examination of nitric oxide's inhibitory effects on viral replication and cytokine production.

    • Main Results:

    • Rhinovirus infections may enhance airway eosinophilia in asthmatics, leading to hyperresponsiveness.
    • Proinflammatory cytokines (IL-6, IL-8, RANTES, GM-CSF) contribute to inflammatory cell recruitment.
    • Nitric oxide inhibits rhinovirus-induced cytokine production and viral replication.

    Conclusions:

    • Viral infections can exacerbate asthma through increased airway inflammation and eosinophilia.
    • Nitric oxide donors show promise as a novel therapeutic strategy for rhinovirus infections and asthma exacerbations.