H7 hemagglutinin-derived peptide-specific T cell receptor (H7-specific TCR)

H7 hemagglutinin-derived peptide-specific T cell receptors (TCRs) are specialized immune receptors found on the surface of T lymphocytes that specifically recognize and bind to peptide fragments derived from the H7 hemagglutinin protein of Influenza A viruses, such as the H7N9 subtype. These TCRs identify viral antigens when they are presented by Major Histocompatibility Complex (MHC) molecules, a process critical for the adaptive immune system to detect and eliminate virally infected cells. In the context of highly pathogenic avian influenza like H7N9, these TCRs play a vital role in providing cross-protective immunity and are a focus of research for developing TCR-engineered T-cell therapies and universal influenza vaccines. By targeting conserved epitopes within the H7 protein, these receptors can trigger robust CD8+ cytotoxic T cell responses or CD4+ helper T cell responses to limit viral replication and improve clinical outcomes. Understanding the structural basis of how these TCRs interact with H7 peptides allows for the design of more effective immunotherapies and the monitoring of patient immune status during outbreaks.

Other names

H7N9-specific T-cell receptorInfluenza A H7 hemagglutinin-specific TCRH7 HA-specific TCRH7-reactive T cell receptor

Recognition of specific H7 hemagglutinin peptides (e.g., HA336-344 or HA168-176) presented by Major Histocompatibility Complex (MHC) molecules on the surface of infected cells, leading to T cell-mediated lysis of the virus-infected cells and secretion of pro-inflammatory cytokines.