T-cell receptor specific for Dermatophagoides farinae allergens (TCR (D. farinae-specific))

The T-cell receptor (TCR) on CD4+ T cells specific for Dermatophagoides farinae (D. farinae) allergens is a primary mediator of the adaptive immune response to house dust mites. These receptors recognize specific allergenic peptides, such as Der f 1 or Der f 2, only when they are presented by HLA class II molecules on the surface of antigen-presenting cells (Source: PMID: 31002914). This recognition event triggers the activation of Th2-polarized CD4+ T cells, which release pro-inflammatory cytokines like IL-4 and IL-13, leading to B-cell isotype switching to IgE and subsequent mast cell sensitization (Source: PMID: 28431214). This molecular pathway is central to the development of allergic diseases, including asthma, rhinitis, and atopic dermatitis (Source: NIH/NIAID). Therapeutic interventions, most notably allergen-specific immunotherapy (AIT), aim to modify this T-cell response by inducing peripheral tolerance, expanding regulatory T (Treg) cell populations, and shifting the cytokine profile from Th2 to Th1 (Source: PMID: 30243708). Drugs such as Acarizax and Actair utilize D. farinae extracts to target these TCR-mediated pathways for long-term desensitization. Monitoring specific IgE/IgG4 ratios and TCR clonotype expansion serves as a critical biomarker for evaluating treatment efficacy and patient response (Source: PMID: 29454811).

Other names

House dust mite-specific T-cell receptorDer f-specific TCRHDM-specific CD4+ T-cell receptorD. farinae-specific TCRDermatophagoides farinae-specific T-cell receptor

Induction of immune tolerance through T-cell desensitization, immune deviation from Th2 to Th1 responses, and the expansion of regulatory T cells (Tregs) that produce IL-10 and TGF-beta to suppress allergic inflammation.