Dermatophagoides farinae allergenic proteins (Der f allergens) (Der f allergens)

Dermatophagoides farinae allergenic proteins are a complex group of proteins produced by the American house dust mite that serve as potent triggers for Type I hypersensitivity reactions. The primary allergens, such as Der f 1 (a cysteine protease) and Der f 2 (a lipid-binding protein that mimics MD-2), are responsible for the majority of IgE-mediated sensitization in patients with house dust mite allergies (UniProt P08176, Q00855). These proteins function by disrupting epithelial barriers and activating innate immune pathways, which subsequently leads to the production of allergen-specific IgE and the activation of mast cells and basophils (PMID: 30103934). Clinically, exposure to these allergens is a major cause of allergic rhinitis, bronchial asthma, and atopic dermatitis. In the pharmaceutical industry, these proteins are the active components in allergen-specific immunotherapy (AIT) products like Odactra and Acarizax. The therapeutic goal is to induce immune tolerance by promoting the development of regulatory T cells and the production of IgG4 blocking antibodies, thereby reducing the inflammatory response upon subsequent natural exposure (FDA Odactra Label). This treatment approach aims to modify the underlying disease rather than just managing symptoms.

Other names

American house dust mite allergensDer f 1Der f 2Der f 3Der f 24HDM allergens

Allergen-specific immunotherapy (AIT) to induce immunological tolerance by shifting the immune response from Th2 to Th1/Treg and increasing IgG4 levels (PMID: 28346139).