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Developmental immunology: clinical application to allergy-immunology
Joseph A Bellanti1, Jonathan Malka-Rais, Henry J Castro
1Department of Pediatrics and the International Center for Interdisciplinary Studies of Immunology, Georgetown University Medical Center, Washington, DC 20057, USA. bellantj@georgetown.edu
Summary
The rising prevalence of allergic diseases is linked to delayed immune system development in infants. Viral infections in early life may trigger allergic sensitization, offering new prevention strategies.
Area of Science:
- Immunology
- Allergy Research
- Pediatric Health
Background:
- Global increase in allergic disease prevalence and associated morbidity/mortality.
- Despite new therapies, asthma rates continue to rise.
- Research focuses on environmental factors and genetic susceptibility markers like respiratory viruses.
Purpose of the Study:
- To propose a unifying hypothesis on the developing immune system's interaction with environmental factors, especially viral infections.
- To understand the changing landscape of allergic diseases across an individual's lifespan.
- To link immune development, viral exposure, and allergic outcomes.
Main Methods:
- Literature review of English language articles from PubMed.
- Inclusion of abstracts with immediate clinical relevance.
- Synthesis of current knowledge on immune system development and environmental interactions.
Main Results:
- Delayed T-helper 1 (Th1) function acquisition in allergy-prone infants predicts allergic disease susceptibility.
- This immune delay also explains infant vulnerability to viral infections like bronchiolitis.
- Early viral infections in susceptible infants appear to promote allergic sensitization.
Conclusions:
- A triad of immune deficiency, viral infection, and genetic susceptibility may explain allergic disease development.
- This understanding can aid in early detection of allergic diseases.
- New intervention strategies for preventing allergic and infectious diseases in infants may emerge.