T-cell receptor specific for influenza A hemagglutinin-derived peptides presented by MHC (HA-specific TCR)

T-cell receptors (TCRs) specific for influenza A hemagglutinin (HA) peptides are specialized proteins on the surface of T-lymphocytes that recognize viral antigens presented by Major Histocompatibility Complex (MHC) molecules (Hennecke & Wiley, 2002). These receptors typically target conserved epitopes of the HA protein, such as the HA 306-318 peptide, which is frequently presented by HLA-DR1 molecules (Ting et al., 2010). Recognition of these complexes is essential for the adaptive immune system to identify and eliminate influenza-infected cells. In clinical research, these TCRs are utilized to develop TCR-engineered T-cell (TCR-T) therapies and to evaluate the efficacy of universal influenza vaccines (Zhao et al., 2021). By engineering T-cells to express high-affinity HA-specific TCRs, researchers aim to provide robust, long-lasting immunity against diverse influenza strains. However, challenges include the potential for viral escape through antigenic drift and the risk of off-target immune responses if the TCR cross-reacts with human self-peptides (Cole et al., 2016).

Other names

Hemagglutinin-specific T-cell receptorHA-specific TCRInfluenza A HA-specific TCRTCR-HAHA-specific T-cell receptor

The TCR binds to a specific influenza hemagglutinin peptide (e.g., HA 306-318) presented by an MHC molecule (e.g., HLA-DR1), triggering the CD3 signaling complex to activate T-cell effector functions such as cytokine release and cell-mediated killing (Hennecke & Wiley, 2002).