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Published on: March 13, 2014
Dietary fatty acid composition during pregnancy and the risk of asthma in the offspring
Mirka Lumia1, Päivi Luukkainen, Heli Tapanainen
1Nutrition Unit, Department of Lifestyle and Participation, National Institute of Health and Welfare, Helsinki, Finland. mirka.lumia@fimnet.fi
Insights
Maternal diet during pregnancy impacts childhood asthma risk. Lower intake of omega-3 fatty acids and higher saturated fats may reduce asthma risk, while arachidonic acid may increase it.
Area of Science:
- Immunology
- Nutritional Science
- Pediatric Allergy
Background:
- Fatty acids (FA) play a role in immune system modulation.
- Dietary fatty acid composition may influence IgE-mediated allergic diseases.
Purpose of the Study:
- To investigate the association between maternal dietary fatty acid intake during pregnancy and the risk of asthma in offspring.
Main Methods:
- Analysis of data from the Finnish Type 1 Diabetes Prediction and Prevention (DIPP) Nutrition Study.
- Maternal dietary intake assessed via a food frequency questionnaire during the 8th month of pregnancy.
- Asthma occurrence evaluated at age 5 using a modified ISAAC questionnaire.
- Statistical analysis performed using Cox proportional hazards regression.
Main Results:
- Low intake of alpha-linolenic acid (18:3n-3) and total n-3 polyunsaturated fatty acids (PUFA) during pregnancy was linked to increased asthma risk.
- Low intake of arachidonic acid (20:4n-6) and high intake of saturated fatty acids, including palmitic acid (16:0), were associated with decreased asthma risk.
- No significant association was found for n-6 to n-3 PUFA ratios or maternal intake of oils and fish products.
Conclusions:
- Maternal fatty acid intake during pregnancy is associated with childhood asthma risk.
- Specific fatty acids like alpha-linolenic acid, total n-3 PUFA, and palmitic acid may offer protection against asthma.
- Arachidonic acid intake might be associated with an increased risk of childhood asthma.
Background:
Fatty acids (FA) modulate the immune system, and it has been proposed that they affect the incidence of IgE-mediated allergic diseases. We explored the association of maternal dietary FA composition during pregnancy with the risk of asthma in the offspring.
Methods:
We analyzed data from the Finnish Type 1 Diabetes Prediction and Prevention (DIPP) Nutrition Study. Maternal dietary intake during pregnancy (8th month) was assessed by a validated 181-item food frequency questionnaire. The occurrence of asthma was assessed at the age of 5 yr with a questionnaire modified from the International Study of Asthma and Allergies in Childhood (ISAAC). Cox proportional hazards regression was used for the statistical analyses.
Results:
Low maternal intakes of α-linolenic acid (18:3n-3) [lowest quarter vs. mid-half HR 1.67 (95% CI 1.12-2.48)] and total n-3-polyunsaturated fatty acids (PUFA) [HR 1.66 (95% CI 1.11-2.48)] during pregnancy were associated with an increased risk of asthma in the offspring, while a low intake of arachidonic acid (20:4n-6) [HR 0.52 (95% CI 0.32-0.84)] and high intake of total saturated fatty acids [highest quarter vs. mid-half HR 0.55 (95% CI 0.34-0.90)] and palmitic acid (16:0) [HR 0.51 (95% CI 0.31-0.83)] were associated with a decreased risk of asthma. The ratios of n-6 to n-3-PUFA and 18:2n-6 to 18:3n-3, and the maternal intake of oils, fish and fish products, showed no association with the risk of asthma. The associations found were independent of several perinatal and clinical confounders.
Conclusion:
Maternal intake of FA during pregnancy was associated with childhood asthma. Maternal α-linolenic acid, total n-3 PUFA and palmitic acid intake may decrease, while arachidonic acid intake may increase the risk of asthma in the offspring.
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