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Guidance for type 2 inflammatory biomarkers.

Kazuto Matsunaga1, Akira Koarai2, Hiroshi Koto3

  • 1Department of Respiratory Medicine and Infectious Disease, Yamaguchi University, Ube, 755-8505, Japan.

Respiratory Investigation
|February 20, 2025
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Summary

Type 2 inflammation, driven by specific cytokines, impacts airway physiology. Biomarkers like blood eosinophils aid in diagnosing and managing lung diseases such as asthma and COPD.

Keywords:
AsthmaChronic obstructive pulmonary diseaseEosinophilExhaled nitric oxideImmunoglobulin E

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Area of Science:

  • Pulmonology and Immunology
  • Respiratory Medicine

Background:

  • Type 2 inflammation, mediated by cytokines (IL-4, IL-5, IL-13) from T cells and innate lymphoid cells, alters airway structure and function.
  • Inflammatory biomarkers (blood eosinophils, fractional exhaled nitric oxide, IgE) are crucial for diagnosing and managing asthma and COPD.
  • Diverse inflammatory phenotypes exist in asthma and COPD, necessitating biomarker assessment for accurate diagnosis and personalized treatment.

Purpose of the Study:

  • To provide evidence-based guidelines for interpreting type 2 inflammation measurements.
  • To promote the routine assessment of airway inflammation in clinical practice.
  • To enhance the management of various airway and respiratory diseases.

Main Methods:

  • Review and synthesis of existing evidence on type 2 inflammation biomarkers.
  • Development of clinical practice guidelines for evaluating type 2 inflammation.
  • Inclusion of diverse respiratory conditions beyond asthma and COPD.

Main Results:

  • Established the role of biomarkers in improving diagnostic accuracy and treatment strategies.
  • Highlighted the predictive value of inflammation assessment for exacerbations and lung function decline.
  • Provided comprehensive guidance on interpreting a variety of clinical biomarkers.

Conclusions:

  • Type 2 inflammation assessment is vital for optimizing the diagnosis and management of respiratory diseases.
  • Biomarker-guided strategies improve treatment efficacy and patient outcomes.
  • Guidelines facilitate the widespread adoption of inflammation assessment in clinical settings.