Fig 2. Primary airway epithelial cells from asthmatics, but not subjects with COPD, generate elevated extracellular uric acid levels.

(A) Cell culture supernatant analysis of uric acid levels in un-stimulated primary human airway epithelial cells from healthy age-matched control subjects and asthmatics following 24h of culture. (B) Cell culture supernatant analysis of uric acid levels in un-stimulated primary human airway epithelial cells from healthy age-matched control subjects and those with COPD following 24h of culture. Data represent mean +/- SD, n = 5–8. Significance is represented by *p<0.05 relative to healthy controls.