ω-3 LCPUFA supplementation during pregnancy and risk of allergic outcomes or sensitization in offspring: A systematic review and meta-analysis

Journal article

Vahdaninia, M., Mackenzie, H., Dean, T. and Helps, S. (2018). ω-3 LCPUFA supplementation during pregnancy and risk of allergic outcomes or sensitization in offspring: A systematic review and meta-analysis. Annals of Allergy, Asthma and Immunology. 122 (3), pp. 302-313. https://doi.org/10.1016/j.anai.2018.12.008
AuthorsVahdaninia, M., Mackenzie, H., Dean, T. and Helps, S.
Abstract

Background: Allergic diseases have increased worldwide in the last 2 decades, with children suffering the highest burden of the condition. The ω-3 long-chain poly-unsaturated fatty acid (LCPUFA) possesses anti-inflammatory properties that could lead to a reduction in inflammatory mediators in allergies. Objective: A systematic review and meta-analysis of the most recent follow-ups of randomized clinical trials (RCTs) was conducted to assess the effectiveness of ω-3 LCPUFA supplementation started during pregnancy on allergic outcomes in offspring. Methods: The RCTs with a minimum of 1-month follow-up post gestation were eligible for inclusion. The CENTRAL, MEDLINE, SCOPUS, WHO's International Clinical Trials Register, E-theses, and Web of Science databases were searched. Study quality was evaluated using the Cochrane Collaboration's risk of bias tool. Results: Ten RCTs (3,637 children), from 9 unique trials, examined the effectiveness of ω-3 LCPUFA supplementation started during pregnancy on the development of allergic outcomes in offspring. Heterogeneities were seen between the trials in terms of their sample, type, and duration of intervention and follow-up. Pooled estimates showed a significant reduction in childhood “sensitization to egg” (relative risk [RR] = 0.54, 95% confidence interval [CI] = 0.32-0.90), and “sensitization to peanut” (RR = 0.62, 95% CI = 0.40-0.96). No statistical differences were found for other allergic outcomes (eg, eczema, asthma/wheeze). Conclusion: These results suggest that intake of ω-3 LCPUFA started during pregnancy can reduce the risk of sensitization to egg and peanut; however, the evidence is limited because of the small number of studies that contributed to the meta-analyses. The current evidence on the association between supplementation with ω-3 LCPUFA started during pregnancy and allergic outcomes is weak, because of the risk of bias and heterogeneities between studies.

Year2018
JournalAnnals of Allergy, Asthma and Immunology
Journal citation122 (3), pp. 302-313
PublisherElsevier
Digital Object Identifier (DOI)https://doi.org/10.1016/j.anai.2018.12.008
Publication dates
Online12 Dec 2018
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Deposited11 Aug 2021
Accepted author manuscript
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Open
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