Comparable reductions in hyperpnoea-induced bronchoconstriction and markers of airway inflammation after supplementation with 6·2 and 3·1 g/d of long-chain n-3 PUFA in adults with asthma

Williams, Neil C.; Hunter, Kirsty A.; Shaw, Dominick E.; Jackson, Kim G.; Sharpe, Graham R.; Johnson, Michael A.

Abstract

Although high dose n-3 PUFA supplementation reduces exercise- and hyperpnoea-induced bronchoconstriction (EIB/HIB), there are concurrent issues with cost, compliance and gastrointestinal discomfort. It is thus pertinent to establish the efficacy of lower n-3 PUFA doses. Eight male adults with asthma and HIB and eight controls without asthma were randomly supplemented with two n-3 PUFA doses (6·2 g/d (3·7 g EPA and 2·5 g DHA) and 3·1 g/d (1·8 g EPA and 1·3 g DHA)) and a placebo, each for 21 d followed by 14 d washout. A eucapnic voluntary hyperpnoea (EVH) challenge was performed before and after treatments. Outcome measures remained unchanged in the control group. In the HIB group, the peak fall in forced expiratory volume in 1 s (FEV1) after EVH at day 0 (−1005 (sd 520) ml, −30 (sd 18) %) was unchanged after placebo. The peak fall in FEV1 was similarly reduced from day 0 to day 21 of 6·2 g/d n-3 PUFA (−1000 (sd 460) ml, −29 (sd 17) % v. −690 (sd 460) ml, −20 (sd 15) %) and 3·1 g/d n-3 PUFA (−970 (sd 480) ml, −28 (sd 18) % v. −700 (sd 420) ml, −21 (sd 15) %) (P

Citation

Williams, N. C., Hunter, K. A., Shaw, D. E., Jackson, K. G., Sharpe, G. R., & Johnson, M. A. (2017). Comparable reductions in hyperpnoea-induced bronchoconstriction and markers of airway inflammation after supplementation with 6·2 and 3·1 g/d of long-chain n-3 PUFA in adults with asthma. British Journal of Nutrition, 117(10), https://doi.org/10.1017/S0007114517001246

• Journal Article Type: Article
• Acceptance Date: May 3, 2017
• Online Publication Date: Jun 13, 2017
• Publication Date: May 28, 2017
• Deposit Date: Jun 15, 2017
• Publicly Available Date: Jun 15, 2017
• Journal: British Journal of Nutrition
• Print ISSN: 0007-1145
• Electronic ISSN: 1475-2662
• Publisher: Cambridge University Press
• Peer Reviewed: Peer Reviewed
• Volume: 117
• Issue: 10
• DOI: https://doi.org/10.1017/S0007114517001246
• Keywords: n-3 PUFA; Asthma; Exercise; Inflammation
• Public URL: https://nottingham-repository.worktribe.com/output/862215
• Publisher URL: https://www.cambridge.org/core/journals/british-journal-of-nutrition/article/comparable-reductions-in-hyperpnoeainduced-bronchoconstriction-and-markers-of-airway-inflammation-after-supplementation-with-62-and-31-gd-of-longchain-n3-pufa-in-adults-with-asth