The role of lipoxin A4 in exercise-induced bronchoconstriction in asthma

J Asthma. 2008 Mar;45(2):161-4. doi: 10.1080/02770900701847068.


Background: The pathogenesis of exercise-induced bronchoconstriction in asthma is incompletely understood, and the role of lipoxin A4 has not been investigated.

Objective: To investigate the involvement of lipoxin A4 in exercise-induced bronchoconstriction.

Methods: Two groups of children were enrolled in the study: asthmatic children with positive (n = 12) and negative (n = 8) responses to exercise. Levels of lipoxin A4 were determined in plasma before and immediately after exercise challenge using enzyme-linked immunosorbent assay.

Results: No significant difference was observed in the pre-exercise lipoxin A4 levels among the groups (p > 0.05). A significant difference was observed in the postexercise lipoxin A4 levels between the two groups (p = 0.041). We also observed significant decreases in plasma lipoxin A4 levels immediately after exercise challenge both in asthmatic children with positive responses to exercise (p = 0.013) and negative responses to exercise (p = 0.05). But these levels were significantly higher in asthmatic children with negative responses to exercise (p = 0.041). There was an inverse correlation between lipoxin A4 levels and a reduction in forced expiratory volume at one second percent after exercise (p = 0.045, r = -0.465).

Conclusion: Our results are the first demonstration of the lower levels of lipoxin A4 associated with exercise-induced bronchoconstriction in asthma. We hypothesize that the development of exercise-induced bronchoconstriction in asthmatic children may be in relation to a reduced endogenous lipoxin biosynthetic capability. Lipoxin mimetics and related compounds could provide novel therapeutic approaches to the treatment of exercise-induced bronchoconstriction in asthma.

Publication types

  • Comparative Study

MeSH terms

  • Adolescent
  • Asthma / blood
  • Asthma / etiology
  • Asthma, Exercise-Induced / blood*
  • Asthma, Exercise-Induced / etiology*
  • Bronchoconstriction / immunology*
  • Child
  • Enzyme-Linked Immunosorbent Assay
  • Exercise Test
  • Female
  • Humans
  • Lipoxins / biosynthesis
  • Lipoxins / blood*
  • Male


  • Lipoxins
  • lipoxin A4