Combining fish oil supplementation and Montelukast [a commonly used cyst LT1 receptor
antagonist to treat exercise-induced bronchoconstriction (EIB)] will provide a greater
antiinflammatory effect against developing EIB that either agent alone
The aim of this study is to extend previous published findings that fish oil supplementation
represents a beneficial treatment on exercise-induced bronchoconstriction (EIB). An
important question is how dietary fish oil supplementation fits in with the available
armamentarium [e.g., leukotriene (LT) modifiers] to decrease the expression of LTs, and
whether fish oil supplementation may be additive, or used in its own right to block the EIB
response. For example, it is possible that a combination of fish oil supplementation and a
cyst LT1 receptor antagonist (LTRA) may provide a greater antiinflammatory effect against
developing EIB that either agent alone.
- Demonstrate a fall in post-exercise FEV1 of > 10% after dry air exercise challenge
for the diagnosis of EIB and
- > 12% increase in FEV1 from the baseline value after the administration of a
β2-agonist. However, if the bronchodilator response is < 12% increase in FEV1 from
the baseline value then asthmatic subjects with EIB must further demonstrate
- A < 16.0 mg.ml-1 concentration of methacholine causing a 20% decrease in FEV1 (PC20)
- Subjects will be excluded if they are pregnant
- Have a history of hyperlipidemia, hypertension, diabetes, bleeding disorders, delayed
- Taking aspirin medication and have a resting FEV1 less than 65% predicted.
- A complete blood count and urinary pregnancy tests will be conducted at the beginning
of the study and subjects with a hematocrit < 35 will be excluded from participation
in the study.
- In addition, subjects will also be excluded if they have a history of taking n-3 PUFA
supplements or supplements with antioxidants above the levels recommended for
Adequate Intake, or regularly consume more than one fish meal per week.