Dermatophagoides farinae allergen-specific T-cell receptor (Der f-specific TCR)

Dermatophagoides farinae allergen-specific T-cell receptors (TCRs) are specialized heterodimeric surface proteins expressed on CD4+ T lymphocytes that mediate the adaptive immune response to house dust mite (HDM) allergens. These receptors specifically recognize peptide fragments derived from D. farinae proteins, such as the major allergens Der f 1 and Der f 2, when presented by Human Leukocyte Antigen (HLA) class II molecules on the surface of antigen-presenting cells [PMID: 28433314]. In sensitized individuals, the binding of these TCRs to the peptide-HLA complex triggers a Th2-polarized inflammatory response, leading to the production of pro-allergic cytokines and allergen-specific IgE, which are central to the pathogenesis of allergic asthma, rhinitis, and atopic dermatitis [PMID: 31009711, PMID: 26231558]. Therapeutic strategies targeting these TCR-mediated pathways, such as allergen-specific immunotherapy (AIT), aim to reprogram the immune system toward a state of tolerance by inducing T-cell anergy or promoting the expansion of regulatory T cells [PMID: 30243710]. The characterization of these TCRs using MHC-peptide tetramers and repertoire sequencing provides critical insights into the mechanisms of desensitization and serves as a valuable tool for monitoring treatment efficacy in precision allergy medicine [PMID: 25652135].

Other names

House dust mite-specific T-cell receptorDer f-specific TCRHDM-specific T-cell receptorDust mite allergen-reactive T-cell receptorDer f 1-specific TCRDer f 2-specific TCR

Modulation of T-cell signaling through repeated allergen exposure to induce peripheral tolerance, characterized by T-cell anergy, deletion of Th2 cells, or the induction of regulatory T cells (Tregs) that secrete suppressive cytokines like IL-10 and TGF-beta [PMID: 30243710].