Atopy

: Systemic immune priming eventually leads to upper and lower airway inflammation. 3. Key Management Strategies

: Sensitization through inflamed skin can lead to early-onset food allergies.

: Upon re-exposure, allergens cross-link IgE on the surface of mast cells, causing degranulation and the release of inflammatory mediators like histamine and leukotrienes. 2. The Atopic March : Systemic immune priming eventually leads to upper

The core of atopy is a Type I hypersensitivity reaction driven by a Type 2 immune response.

: These cells produce cytokines (IL-4, IL-13) that trigger B cells to differentiate into plasma cells producing allergen-specific IgE. : Upon re-exposure, allergens cross-link IgE on the

: Often the first sign in infancy, caused by skin barrier defects (e.g., filaggrin mutations) that allow for epicutaneous allergen sensitization.

While there is currently no cure, management focuses on controlling inflammation and restoring barrier function. Atopy - StatPearls - NCBI Bookshelf - NIH : These cells produce cytokines (IL-4, IL-13) that

: Antigen-presenting cells perceive allergens (like pollen or dust mites) as danger signals, activating TH2 or ILC2 cells.