House dust mite allergens (Dermatophagoides pteronyssinus) (Der p allergens)

IgE-binding allergenic proteins from Dermatophagoides pteronyssinus, commonly known as the European house dust mite, are a diverse group of proteins that serve as primary triggers for Type I hypersensitivity reactions worldwide (NIH, 2023). These allergens, which include major components such as Der p 1 (a cysteine protease), Der p 2 (a lipid-binding protein), and Der p 23, are found in mite fecal pellets and body fragments (ThermoFisher, 2024). Upon inhalation or skin contact, they cross-link allergen-specific IgE antibodies on the surface of mast cells and basophils, leading to the release of inflammatory mediators like histamine and leukotrienes (PubMed, 2022). This process underlies the pathogenesis of allergic rhinitis, asthma, and atopic dermatitis (NIH, 2020). In a therapeutic context, these proteins are the active ingredients in allergen immunotherapy (AIT), which aims to desensitize the immune system and induce long-term tolerance (FDA, 2024). While AIT is highly effective, it carries risks of systemic allergic reactions, including anaphylaxis, necessitating careful clinical supervision (MedicineNet, 2023).

Other names

Dermatophagoides pteronyssinus allergensEuropean house dust mite allergensMite allergenic extractsDer p proteinsHouse dust mite antigens

Allergen immunotherapy (AIT) involves the administration of gradually increasing doses of these allergenic proteins to induce immunological tolerance. This process promotes a shift from a Th2-mediated allergic response to a Th1/Treg-mediated response, increases the production of allergen-specific IgG4 blocking antibodies, and reduces the sensitivity of mast cells and basophils to IgE-mediated activation.