T-cell receptor (TCR) recognizing Tick-borne encephalitis virus (TBEV) peptides presented on HLA class II (TBEV-specific CD4+ TCR)

Human CD4+ T-cell receptors (TCRs) recognizing Tick-borne encephalitis virus (TBEV) peptides are specialized heterodimeric surface proteins that play a pivotal role in the adaptive immune response against TBEV infection. These receptors, typically composed of alpha and beta chains, specifically bind to viral epitopes—predominantly derived from the envelope (E) protein—when they are presented by Human Leukocyte Antigen (HLA) class II molecules, such as HLA-DR, on the surface of antigen-presenting cells (Schwaiger et al., 2003, Journal of Virology). This recognition event is the primary trigger for the activation and differentiation of CD4+ helper T cells, which subsequently coordinate the immune system by secreting cytokines like interferon-gamma and providing essential help to B cells for high-affinity antibody production (Blom et al., 2015, Journal of Virology). In clinical practice, these TCRs are the functional targets of TBEV vaccines, which aim to elicit a robust and persistent population of memory CD4+ T cells to prevent neuroinvasive disease (Aberle et al., 2015, Clinical & Experimental Immunology). Furthermore, the characterization of these TCRs and their specific HLA restrictions is crucial for developing diagnostic tools to assess vaccine-induced immunity and for exploring potential TCR-based immunotherapies for flavivirus infections. The diversity and specificity of the TBEV-specific TCR repertoire are key determinants of an individual's ability to clear the virus and avoid severe complications like encephalitis or meningitis.

Other names

TBEV-specific T-cell receptorCD4+ T-cell receptor for TBEVTick-borne encephalitis virus-specific TCRHLA class II-restricted TBEV TCR

Recognition of TBEV-derived peptides presented by HLA class II molecules, leading to CD4+ T-cell activation and orchestration of adaptive immunity.