Prawn tropomyosin-specific CD4+ T-cell receptor (Tropomyosin-specific TCR)

The prawn tropomyosin-specific CD4+ T-cell receptor is a specialized protein complex found on the surface of helper T cells that plays a central role in mediating allergic reactions to shellfish. It specifically recognizes epitopes of tropomyosin, such as Pen m 1 from Penaeus monodon, when these peptides are presented by Major Histocompatibility Complex class II (MHC II) molecules on antigen-presenting cells (Source: PMID: 27501234). Upon binding to the tropomyosin peptide-MHC II complex, the receptor triggers a signaling cascade that leads to the activation of Th2 cells, which subsequently drive the production of allergen-specific IgE and the recruitment of eosinophils and mast cells (Source: PMID: 30103138). This molecular interaction is the primary driver of clinical symptoms ranging from oral allergy syndrome to life-threatening anaphylaxis in sensitized individuals. In the context of drug development, this TCR is a target for allergen-specific immunotherapies designed to modulate the immune system toward tolerance, often through the use of modified peptides or T-cell epitope-based vaccines (Source: PMID: 28611291). Understanding the specific TCR sequences and their binding affinities is crucial for developing precision medicine approaches to treat shrimp allergy and for monitoring the efficacy of desensitization protocols.

Other names

Shrimp tropomyosin-specific T-cell receptorPen m 1-specific TCRTropomyosin-reactive T-cell receptorCrustacean allergen-specific TCR

Therapeutic strategies targeting this receptor typically involve allergen-specific immunotherapy (AIT) to induce T-cell anergy or the expansion of regulatory T cells (Tregs) that suppress the Th2-mediated allergic response (Source: PMID: 31430346).