What question did this study set out to answer?

The aim is to explore differences in levels of lipoxin A4 and leukotriene B4 in exhaled breath of patients with severe refractory asthma compared to healthy controls.

March 24, 2026European Respiratory Journal

Imbalance of anti-inflammatory (lipoxin A4) and pro-inflammatory (leukotrien B4) arachidonic acid products in exhaled breath condensate of severe refractory asthma

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The aim is to explore differences in levels of lipoxin A4 and leukotriene B4 in exhaled breath of patients with severe refractory asthma compared to healthy controls.
Collected exhaled breath condensate from 59 severe refractory asthma patients and 38 healthy controls.
Analyzed levels of lipoxin A4 and leukotriene B4 using liquid chromatography and mass spectrometry.
Classified asthma patients into eosinophilic and non-eosinophilic subgroups based on exhaled nitric oxide levels.
Compared inflammatory mediator levels and patient characteristics statistically.
LXA concentration was significantly lower in asthma patients (27.65 pg/ml) compared to healthy controls (59.89 pg/ml, p<0.001).
LXA/LTB ratio was lower in severe asthma patients (0.87) than in healthy controls (3.31, p<0.001).
LTB4 levels were similar in eosinophilic and non-eosinophilic subgroups (33.6 vs. 32.4 pg/ml, p=0.19).
LXA was higher in eosinophilic phenotype (28.9 pg/ml) compared to non-eosinophilic phenotype (26.4 pg/ml, p=0.01).

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Implication

Investigates the imbalance of inflammatory mediators in exhaled breath of severe asthma patients, indicating potential therapeutic targets.

Cite This Study

Sedlák et al. (2014) studied this question.

synapsesocial.com/papers/69c22982aeb5a845df0d40f1 https://doi.org/10.1183/13993003/erj.44.suppl_58.p990

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Implication

Investigates the imbalance of inflammatory mediators in exhaled breath of severe asthma patients, indicating potential therapeutic targets.

Imbalance of anti-inflammatory (lipoxin A4) and pro-inflammatory (leukotrien B4) arachidonic acid products in exhaled breath condensate of severe refractory asthma

Key Points

Discussion

Implication

Cite This Study

Imbalance of anti-inflammatory (lipoxin A4) and pro-inflammatory (leukotrien B4) arachidonic acid products in exhaled breath condensate of severe refractory asthma

Key Points

Discussion

Implication

Cite This Study

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