T-cell receptor on CD4+ T cells recognizing Rumex obtusifolius–MHC-II complexes (TCR)

The T-cell receptor (TCR) on CD4+ T cells is a specialized heterodimeric protein complex responsible for the specific recognition of antigenic peptides presented by Major Histocompatibility Complex class II (MHC-II) molecules. In the context of allergy to Rumex obtusifolius (Broad-leaved dock), these TCRs specifically bind to peptides derived from Rumex pollen allergens, which are processed and presented by antigen-presenting cells. This recognition event is the primary trigger for the activation of Th2-polarized helper T cells, which drive the production of allergen-specific IgE and the subsequent inflammatory cascade associated with seasonal allergic rhinitis and asthma. Therapeutic strategies targeting this interaction include allergen-specific immunotherapy (AIT), which utilizes Rumex extracts to induce peripheral immune tolerance, and pharmacological agents like calcineurin inhibitors that block downstream TCR signaling pathways. Monitoring these specific TCR-pMHC interactions using advanced tools like MHC-II tetramers is essential for evaluating disease progression and the efficacy of desensitization treatments.

Other names

T-cell antigen receptorTCR alpha-beta complexAllergen-specific T-cell receptorCD4+ T-cell receptor

Induction of immune tolerance through regulatory T-cell expansion; Inhibition of calcineurin-mediated NFAT activation; Modulation of the TCR/CD3 complex to induce T-cell unresponsiveness.