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Role of food allergy in asthma in childhood.

Abstract

Atopy is the major predisposing factor for asthma identified up to now, and allergen exposure, particularly indoor allergens, is considered as a causal factor for asthma. Food allergy is frequently underestimated in association with asthma, however food allergy has been shown to trigger or exacerbate broncho-obstruction in 2 to 8.5% of children with asthma. There is also evidence that double-blind placebo-controlled oral challenge is able to increase unspecific bronchial hyperresponsiveness. Sensitization to food can occur early in life involving T cell response, mainly of the Th2 phenotype, but also IgE-mediated hypersensitivity. Moreover, it has been shown that sensitization to food allergens early in life is a risk factor for sensitization to inhalent allergens and respiratory symptoms later on. Epidemiological studies suggest that changes in the dietary composition, such as trans-fatty acids, could be involved in the increase of asthma prevalence. The introduction of formula during the first trimester of life increases the risk of having asthma. The diagnosis of food allergy associated with asthma is not easy, nevertheless is important for allergists, pulmonologists and paediatricians to consider food allergy in children with respiratory symptoms, especially when asthma symptoms start early in life and when they are associated with other manifestations of food allergy. Children sensitized to cow's milk proteins and also having atopic eczema are at higher risk for asthma. Since avoidance of the offending food is the first step in the management of children with asthma associated with food allergy, a careful identification should be done in order to avoid unnecessary elimination of foods.

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  • Authors+Show Affiliations

    ,

    Division of Immunology and Respiratory Medicine, Department of Pediatric, Infantile Hospital Cordoba, Argentina. baena@powernet.net.ar

    Source

    MeSH

    Asthma
    Child
    Food Hypersensitivity
    Humans

    Pub Type(s)

    Journal Article
    Review

    Language

    eng

    PubMed ID

    11964682

    Citation

    Baena-Cagnani, C E., and A Teijeiro. "Role of Food Allergy in Asthma in Childhood." Current Opinion in Allergy and Clinical Immunology, vol. 1, no. 2, 2001, pp. 145-9.
    Baena-Cagnani CE, Teijeiro A. Role of food allergy in asthma in childhood. Curr Opin Allergy Clin Immunol. 2001;1(2):145-9.
    Baena-Cagnani, C. E., & Teijeiro, A. (2001). Role of food allergy in asthma in childhood. Current Opinion in Allergy and Clinical Immunology, 1(2), pp. 145-9.
    Baena-Cagnani CE, Teijeiro A. Role of Food Allergy in Asthma in Childhood. Curr Opin Allergy Clin Immunol. 2001;1(2):145-9. PubMed PMID: 11964682.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - Role of food allergy in asthma in childhood. AU - Baena-Cagnani,C E, AU - Teijeiro,A, PY - 2002/4/20/pubmed PY - 2002/5/3/medline PY - 2002/4/20/entrez SP - 145 EP - 9 JF - Current opinion in allergy and clinical immunology JO - Curr Opin Allergy Clin Immunol VL - 1 IS - 2 N2 - Atopy is the major predisposing factor for asthma identified up to now, and allergen exposure, particularly indoor allergens, is considered as a causal factor for asthma. Food allergy is frequently underestimated in association with asthma, however food allergy has been shown to trigger or exacerbate broncho-obstruction in 2 to 8.5% of children with asthma. There is also evidence that double-blind placebo-controlled oral challenge is able to increase unspecific bronchial hyperresponsiveness. Sensitization to food can occur early in life involving T cell response, mainly of the Th2 phenotype, but also IgE-mediated hypersensitivity. Moreover, it has been shown that sensitization to food allergens early in life is a risk factor for sensitization to inhalent allergens and respiratory symptoms later on. Epidemiological studies suggest that changes in the dietary composition, such as trans-fatty acids, could be involved in the increase of asthma prevalence. The introduction of formula during the first trimester of life increases the risk of having asthma. The diagnosis of food allergy associated with asthma is not easy, nevertheless is important for allergists, pulmonologists and paediatricians to consider food allergy in children with respiratory symptoms, especially when asthma symptoms start early in life and when they are associated with other manifestations of food allergy. Children sensitized to cow's milk proteins and also having atopic eczema are at higher risk for asthma. Since avoidance of the offending food is the first step in the management of children with asthma associated with food allergy, a careful identification should be done in order to avoid unnecessary elimination of foods. SN - 1528-4050 UR - https://www.unboundmedicine.com/medline/citation/11964682/Role_of_food_allergy_in_asthma_in_childhood_ L2 - http://Insights.ovid.com/pubmed?pmid=11964682 DB - PRIME DP - Unbound Medicine ER -