ω-3 fatty acids contribute to the asthma-protective effect of unprocessed cow's milk.
J Allergy Clin Immunol
; 137(6): 1699-1706.e13, 2016 06.
Article
em En
| MEDLINE
| ID: mdl-26792208
ABSTRACT
BACKGROUND:
Living on a farm has repeatedly been shown to protect children from asthma and allergies. A major factor involved in this effect is consumption of unprocessed cow's milk obtained directly from a farm. However, this phenomenon has never been shown in a longitudinal design, and the responsible milk components are still unknown.OBJECTIVES:
We sought to assess the asthma-protective effect of unprocessed cow's milk consumption in a birth cohort and to determine whether the differences in the fatty acid (FA) composition of unprocessed farm milk and industrially processed milk contributed to this effect.METHODS:
The Protection Against Allergy-Study in Rural Environments (PASTURE) study followed 1133 children living in rural areas in 5 European countries from birth to age 6 years. In 934 children milk consumption was assessed by using yearly questionnaires, and samples of the "usually" consumed milk and serum samples of the children were collected at age 4 years. Doctor-diagnosed asthma was parent reported at age 6 years. In a nested case-control study of 35 asthmatic and 49 nonasthmatic children, 42 FAs were quantified in milk samples.RESULTS:
The risk of asthma at 6 years of age was reduced by previous consumption of unprocessed farm milk compared with shop milk (adjusted odds ratio for consumption at 4 years, 0.26; 95% CI, 0.10-0.67). Part of the effect was explained by the higher fat content of farm milk, particularly the higher levels of ω-3 polyunsaturated FAs (adjusted odds ratio, 0.29; 95% CI, 0.11-0.81).CONCLUSION:
Continuous farm milk consumption in childhood protects against asthma at school age partially by means of higher intake of ω-3 polyunsaturated FAs, which are precursors of anti-inflammatory mediators.Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Asma
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Ácidos Graxos Ômega-3
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Leite
Tipo de estudo:
Clinical_trials
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Etiology_studies
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Observational_studies
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Risk_factors_studies
Limite:
Animals
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Child
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Child, preschool
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Female
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Humans
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Infant
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Male
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Newborn
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article