Dermatophagoides farinae-specific T-cell receptor (Df-specific TCR)

Dermatophagoides farinae-specific T-cell receptors (TCRs) are membrane-bound heterodimers expressed on T lymphocytes that mediate the immune recognition of allergens from the American house dust mite (O'Hehir et al., 1991). These receptors specifically interact with mite-derived peptides, such as those from Der f 1 or Der f 2, when they are presented by Major Histocompatibility Complex (MHC) class II molecules on the surface of antigen-presenting cells (Wambre et al., 2017). In sensitized individuals, this interaction triggers the activation and clonal expansion of Th2 cells, which orchestrate allergic inflammation through the release of cytokines like IL-4 and IL-13 (PubMed: 28714981). This process is a fundamental driver of clinical symptoms in allergic asthma, rhinitis, and atopic dermatitis (StatPearls: Dust Mite Allergy). Therapeutic intervention often involves allergen immunotherapy (AIT), such as Odactra or Acarizax, which utilizes controlled exposure to mite antigens to modulate TCR-mediated signaling and promote the development of regulatory T cells (FDA, 2017). Understanding the specificity and repertoire of these TCRs is increasingly important for developing personalized diagnostic tools and monitoring the success of desensitization therapies (Journal of Allergy and Clinical Immunology, 2020).

Other names

House dust mite-specific T-cell receptorHDM-specific TCRDer f-specific TCRMite-allergen specific TCR

Allergen immunotherapy (AIT) products containing Dermatophagoides farinae antigens interact with these TCRs by providing the specific peptide-MHC ligands required for T-cell activation. Chronic, low-dose exposure via AIT induces a state of tolerance in the allergen-specific T-cell population, primarily by promoting the differentiation of IL-10-secreting regulatory T cells (Tregs) and shifting the cytokine profile away from Th2-mediated inflammation (Wambre et al., 2017; JACI, 2020).