T-cell receptor recognizing Battey antigen-derived peptide–MHC class II complexes

The T-cell receptor (TCR) recognizing Battey antigen-derived peptide–MHC class II complexes is a specialized immune receptor found on the surface of CD4+ T lymphocytes (Janeway et al., 2001). It specifically binds to peptides derived from Mycobacterium intracellulare (historically known as the Battey bacillus) when they are presented by Major Histocompatibility Complex (MHC) class II molecules on antigen-presenting cells (Wolinsky, 1979). This interaction is a critical step in the cellular immune response against nontuberculous mycobacterial (NTM) infections, leading to T-cell proliferation and the secretion of pro-inflammatory cytokines like IFN-gamma and TNF-alpha (Griffith et al., 2007). While not a traditional target for small-molecule drugs, these TCRs are significant in the development of diagnostic assays, such as the PPD-B skin test, and are studied for their cross-reactivity with Mycobacterium tuberculosis antigens (Edwards et al., 1969). Understanding this TCR specificity is vital for differentiating between various mycobacterial infections and for designing targeted immunotherapies or vaccines for NTM lung disease. The receptor's role in orchestrating the delayed-type hypersensitivity response makes it a key focus in mycobacterial immunology research.

Other names

Battey-specific T-cell receptorMycobacterium intracellulare-reactive TCRPPD-B-reactive T-cell receptorTCR recognizing M. intracellulare antigens

The TCR recognizes and binds to the specific peptide-MHC II complex, initiating intracellular signaling via the CD3 complex, leading to T-cell activation, cytokine secretion, and orchestration of the cell-mediated immune response against Mycobacterium intracellulare.