Clinical Parameters vs Cytokine Profiles as Predictive Markers of IgE-Mediated Allergy in Young Children (original) (raw)
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Allergy, 2011
Background: Early identification of children at risk for later development of allergic disease is essential for early intervention and initiation of proper treatment and management. Objective: To investigate the relationship between low levels (0.1-0.7 kU A /l) of IgE sensitization to food and inhalant allergens and symptoms of eczema, rhinitis, and asthma from birth to 5 years of age. Methods: Children (268) were followed prospectively from birth to 5 years of age with physical examinations and measurements of s-IgE at 6, 12, 24, and 60 months of age. Results: Seventy-four percent of the children with low levels of s-IgE to egg and/or milk at the age of 6 months were still sensitized to one or more allergens at age 2 years. Eighty-four percent of the children with low levels of s-IgE to any of the studied allergens at 12 months of age were still sensitized at age 5. The low levels of egg and milk s-IgE also significantly increased the risk for eczema at the same age and also increased the risk for eczema at 2 years of age. Conclusion: Low levels of s-IgE can be detected from the age of 6 months and are related to further IgE sensitization. The low levels seem to be of importance for both the association to present symptoms and for prediction of future allergic symptoms, especially eczema during early infancy. A detectable s-IgE level, albeit low, could be a clear signal that the immune system is alerted and should be followed.
International Archives of Allergy and Immunology, 2007
specificity for atopy were assessed on the other 50% of nonatopic and on all atopic subjects. The 95th percentile of IgEt reference values in non-smokers was 148 kU/l in women and 169 kU/l in men, while it was 194 and 220 kU/l in female and male smokers, respectively: serum IgE-t above the 95th percentile identifies ! 32% and above the 99th percentile ! 20% of atopic adults (low sensitivity), but a serum IgE-t below the 95th percentile identifies 1 90% and below the 99th percentile identifies 1 95% of non-atopic adults (good specificity). Due to the adequate specificity, IgE-t values exceeding the normal limits confirm a suspected atopic status; however, because of the low sensitivity, values below the cutoff seem not to exclude an atopic status with sufficient accuracy.
Allergy, 2006
The synthesis of allergen-specific IgE is required for the development of allergic diseases including allergic rhinitis and allergic asthma (patients), but many individuals with allergen-specific IgE do not develop symptoms (asymptomatic subjects). Differences may exist between asymptomatic subjects and patients. Whether the presence of allergen-specific IgE translates into clinical allergy most likely depends on a complex interplay of multiple factors. These include a family history of atopy, the levels of total serum IgE and, allergen-specific IgE or IgG, epitope-specificity of IgE and their degree of polyclonality (monovs polysensitized), as yet unidentified serum factors, the balance of T regulatory cells (Treg) and Th1/Th2 cells, the polymorphisms of the high affinity receptor for IgE (FceRI) and other factors regulating the activation of FceRI-bearing cells. Asymptomatic subjects may be more often monosensitized than patients who may be more often polysensitized. There are many unanswered important questions that need to be addressed in order to better understand how IgE sensitization translates into clinical allergy. The assessment of differences between the asymptomatic and symptomatic groups of subjects represent one of the scientific programs of Global Allergy and Asthma European Network funded by the European Union and the hypotheses underlying these differences are presented in this paper.
Maternal Serum IgE, Cord Blood IgE, and Children’s Allergy: A Narrative Review
Journal of Pediatrics Review
Context: Asthma is chronic inflammatory disorder of the respiratory system in childhood. IgE has an important role in allergic disorders such as asthma. The aim of this study is to review the association between maternal serum IgE and incidence of childhood asthma. Evidence Acquisition: Three researchers searched all articles in PubMed, Scopus, Google and Embase databases related to maternal serum IgE, cord blood IgE, childhood asthma and incidence using key words such as maternal IgE, cord blood IgE, relation, association, childhood asthma, child allergy. Results: We found a few related articles on the topic of maternal IgE, cord blood IgE, and childhood asthma. We reviewed 11 articles for this study. Parental atopy and allergy are more important predictive factors for children's allergies such as asthma. IgE levels was higher in children whose mothers had higher IgE levels. Total IgE level was significantly higher in boys compared to girls. Conclusions: Increasing maternal and cord blood IgE may be a predictive factor for development of children asthma. More data is needed to clearify this relation.