T cell receptor on CD4+ T helper cells recognizing rabies virus glycoprotein G-derived peptides (TCR (RABV-G specific))

The T cell receptor (TCR) on CD4+ T helper cells specific for rabies virus glycoprotein G (RABV-G) is a critical component of the adaptive immune response against rabies (Source: PubMed PMID 10623882). This receptor recognizes viral peptides processed and presented by Major Histocompatibility Complex (MHC) class II molecules on the surface of professional antigen-presenting cells (Source: UniProt P03524). Upon binding, the TCR initiates intracellular signaling that activates the T helper cell, leading to the secretion of cytokines such as IL-2 and IFN-gamma (Source: PubMed PMID 7525758). These cytokines are essential for the maturation and class-switching of B cells into plasma cells that produce neutralizing antibodies against the rabies virus. In the context of vaccination, the interaction between the vaccine-derived G protein peptides and these specific TCRs is the primary mechanism for establishing long-term immunity (Source: WHO Rabies Fact Sheet). Understanding the specificity and diversity of these TCRs is vital for developing more effective rabies vaccines and potential immunotherapies. This target is central to the efficacy of post-exposure prophylaxis and the prevention of the nearly 100% fatal rabies infection.

Other names

Rabies virus glycoprotein-specific T cell receptorRABV-G specific TCRCD4+ T-cell receptor for rabies G proteinMHC class II-restricted rabies G-specific TCR

The T cell receptor recognizes specific rabies glycoprotein G peptides presented by MHC class II molecules on antigen-presenting cells, triggering a signaling cascade that leads to T helper cell activation, cytokine secretion, and B cell help for antibody production.