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Biomarkers predicting response to corticosteroid therapy in asthma
Christopher E Brightling1, Ruth H Green, Ian D Pavord
1Institute for Lung Health, University of Leicester and University Hospitals of Leicester, Leicester, UK. ceb17@le.ac.uk
Treatments in Respiratory Medicine
|September 3, 2005
Summary
Predicting asthma corticosteroid response is key. Sputum eosinophilia best predicts short-term treatment success, reducing severe asthma exacerbations, but sputum induction is labor-intensive.
Area of Science:
- Pulmonology
- Clinical Medicine
- Biomarker Research
Background:
- Corticosteroids are vital for asthma management, reducing airway inflammation and improving lung function.
- Individual responses to corticosteroids vary, necessitating predictive biomarkers for personalized treatment.
- Current biomarkers include lung function, blood/sputum inflammation, exhaled gases, and breath condensates.
Purpose of the Study:
- To evaluate biomarkers for predicting patient response to corticosteroid therapy in asthma.
- To identify reliable markers for guiding asthma treatment and improving patient outcomes.
Main Methods:
- Review of studies assessing biomarkers like airway hyperresponsiveness, exhaled nitric oxide (eNO), and induced sputum following corticosteroid treatment.
- Focus on sputum eosinophilia as a predictor of short-term corticosteroid response.
Main Results:
- Sputum eosinophilia is the most effective predictor of short-term corticosteroid response in asthma.
- Targeting sputum eosinophil normalization significantly reduces severe asthma exacerbations.
- Exhaled nitric oxide (eNO) measurement is simpler but has not reduced exacerbation rates.
Conclusions:
- Sputum eosinophilia is a valuable biomarker for predicting short-term corticosteroid response and guiding asthma management.
- The labor-intensive nature of sputum induction limits its widespread use.
- Further research is needed to simplify sputum eosinophilia measurement or find alternative predictive inflammatory markers for both short- and long-term corticosteroid response.
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