Childhood PUFA levels in relation to allergic sensitization and rhinitis up to young adulthood

Area of Science:

• Immunology
• Nutritional Science
• Epidemiology

Background:

• Very long-chain polyunsaturated fatty acids (VLC PUFA) are hypothesized to impact allergic disease risk.
• Investigating the role of omega-3 (n-3) and omega-6 (n-6) PUFA in childhood and adolescence is crucial for understanding allergic rhinitis and sensitization development.

Purpose of the Study:

• To examine the association between plasma levels of n-3 and n-6 PUFA during childhood and adolescence.
• To determine the impact of these PUFA levels on the development of rhinitis and allergic sensitization up to young adulthood.

Main Methods:

• Analysis of plasma phospholipid PUFA proportions in 933 participants from the BAMSE cohort at ages 8 and 16 years using gas chromatography.
• Generalized estimating equations and logistic regression models were used to analyze associations with rhinitis and IgE-mediated aeroallergen sensitization up to age 24 years.

Main Results:

• Elevated plasma VLC n-3 PUFA and arachidonic acid (AA, an n-6 PUFA) at age 8 were inversely associated with rhinitis and aeroallergen sensitization up to age 24.
• Odds ratios for rhinitis ranged from 0.69 to 0.72, and for sensitization from 0.64 to 0.71.
• Excluding participants with prevalent disease at age 8 attenuated these associations.

Conclusions:

• Childhood plasma levels of n-3 PUFA and specific n-6 PUFA show an inverse relationship with allergic sensitization and allergic rhinitis persisting into young adulthood.
• The findings suggest that persistent childhood conditions may partly explain these associations.
• Further research is needed to differentiate the roles of dietary intake versus metabolism of PUFA in preventing rhinitis and allergic sensitization.