Fel d 1 allergen-specific T cell receptor

The "Fel d 1 allergen-specific T cell receptor" refers to the diverse group of T cell receptors (TCRs) expressed on T lymphocytes that specifically recognize peptides derived from Fel d 1, the major cat allergen, in the context of MHC class II on antigen-presenting cells. Engagement of these TCRs leads to activation and differentiation of CD4+ T cells, most commonly along the Th2 axis, promoting IgE production and the subsequent allergic immune cascade. TCR recognition of Fel d 1 epitopes is a central event in the immunopathogenesis of cat allergy and asthma, and modulation of these T cell responses—either through peptide immunotherapies, epitope vaccines, or immune tolerance induction—is an area of active therapeutic research. Unlike classical druggable targets (e.g., ion channels, enzymes), the "Fel d 1 allergen-specific T cell receptor" is not a single molecular entity but a population of receptors with heterogeneous specificity, making direct pharmacological targeting impractical. Efforts instead focus on manipulating the immune response to Fel d 1 peptides to achieve tolerance or reduce allergic symptoms[3][5][7].

Other names

Allergen-specific T cell receptor for Fel d 1TCR recognizing Fel d 1Cat allergen-specific T cell receptor

Recognition of Fel d 1-derived peptides presented on MHC class II by antigen-presenting cells, leading to activation of allergen-specific CD4+ T cells, driving Th2 polarization and subsequent IgE-mediated allergy pathways[3][5]