B-cell receptor and T-cell receptor recognizing tetanus, diphtheria, and pertussis toxoid epitopes (BCR/TCR (Tdap-specific))

B-cell receptors (BCRs) and T-cell receptors (TCRs) recognizing tetanus, diphtheria, and pertussis toxoid epitopes are the fundamental components of the adaptive immune system responsible for providing protection against these three bacterial diseases (Janeway et al., Immunobiology, 2001). BCRs on the surface of B-lymphocytes bind directly to the toxoids—inactivated forms of the toxins produced by Clostridium tetani, Corynebacterium diphtheriae, and Bordetella pertussis—initiating the production of high-affinity neutralizing antibodies (StatPearls, 2023). Simultaneously, TCRs on T-lymphocytes recognize processed toxoid peptides presented by major histocompatibility complex (MHC) molecules, facilitating the helper T-cell signals required for B-cell maturation and the generation of long-lived memory cells (CDC, 2021). Therapeutic intervention primarily occurs through vaccination with DTaP or Tdap, which introduces these toxoid epitopes to prime the immune system (NIH, 2022). This interaction ensures that upon subsequent exposure to the live pathogens, the immune system can rapidly neutralize the toxins and prevent clinical disease. Monitoring the efficacy of these interactions is typically performed by measuring serum antibody titers against the respective toxoids (PubMed, PMID: 28433507).

Other names

Tdap-specific immune receptorsTetanus-diphtheria-pertussis specific BCR and TCRAnti-toxoid receptorsTetanus toxoid-specific TCRDiphtheria toxoid-specific BCR

Antigen-specific binding of toxoid epitopes to BCRs and TCRs triggers lymphocyte activation, clonal expansion, and the formation of memory B and T cells, as well as plasma cells that secrete neutralizing antibodies.