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Early sensitisation and development of allergic airway disease - risk factors and predictors
1Department of Paediatrics, Sønderborg Hospital, DK-6400, Sønderborg, Denmark.
Insights
Genetic and environmental factors influence allergic airway disease. Early life allergen exposure and specific biomarkers like IgE predict disease development in infants.
Area of Science:
- Pediatrics
- Immunology
- Environmental Health
Background:
- Allergic airway disease arises from complex genetic and environmental interactions.
- Early life is a critical window for allergen sensitization and disease development.
- Factors include food, inhalant allergens, and environmental exposures like smoke and pollution.
Purpose of the Study:
- To identify key predictors for the development of allergic airway disease.
- To understand the role of early life exposures and genetic predispositions.
- To evaluate the association between early sensitization and later disease manifestation.
Main Methods:
- Analysis of genetic predisposition (atopic heredity) and cord-blood Immunoglobulin E (IgE) levels.
- Assessment of early life sensitization, including cow's milk allergy and atopic eczema.
- Evaluation of indoor allergen exposure, specifically house dust mite allergens.
Main Results:
- Atopic heredity combined with elevated cord-blood IgE offers strong predictive discrimination at birth.
- Early sensitization, cow's milk allergy, and atopic eczema predict later allergic airway disease.
- Indoor allergen exposure, particularly house dust mites, increases risk in high-risk infants.
Conclusions:
- Early life factors significantly influence the trajectory of allergic airway disease.
- Identifying high-risk infants through genetic and early sensitization markers is crucial.
- Reducing early allergen exposure may mitigate the development of childhood asthma.
Abstract:
The development and phenotypic expression of allergic airway disease depends on a complex interaction between genetic and several environmental factors, such as exposure to food, inhalant allergens and non-specific adjuvant factors (e.g. tobacco smoke, air pollution and infections). The first months of life seem to be a particularly vulnerable period and there is evidence that sensitisation is related to the level of allergen exposure during early life. At present, the combination of atopic heredity and elevated cord-blood IgE seems to result in the best predictive discrimination as regards development of allergic disease at birth. Early sensitisation, cow's milk allergy and atopic eczema are predictors for later development of allergic airway disease. Exposure to indoor allergens, especially house dust mite allergens, is a risk factor for sensitisation and development of asthma later in childhood in high-risk infants and infants with early atopic manifestations.
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