T-cell receptor specific for rotavirus peptide–MHC complexes (RV-specific TCR)

The T-cell receptor (TCR) specific for rotavirus peptide–MHC complexes is a specialized protein complex on the surface of T lymphocytes responsible for identifying cells infected with rotavirus [1]. These receptors recognize specific viral antigens, primarily derived from the VP6, VP7, and VP4 proteins, which are processed and presented by Major Histocompatibility Complex (MHC) molecules [2]. Upon recognition, the TCR initiates a signaling cascade involving the CD3 complex, leading to T-cell activation, proliferation, and the production of effector cytokines such as interferon-gamma and tumor necrosis factor-alpha [3]. This target is central to the development of adoptive T-cell therapies (TCR-T), where T cells are genetically modified to express high-affinity TCRs to treat persistent rotavirus infections in immunocompromised patients [4]. The therapeutic application of these TCRs relies on the precise matching of the TCR to the patient's HLA type and the specific viral epitope present [5]. Potential challenges include the risk of off-target effects if the TCR cross-reacts with similar host peptides, as well as the potential for viral escape through mutations in the targeted epitopes [6].

Other names

Rotavirus-specific T-cell receptorRV-specific TCRTCR-RVT-cell receptor specific for rotavirus antigen

The mechanism involves the specific binding of the TCR to a rotavirus-derived peptide (e.g., from VP6) presented by an MHC molecule on an infected cell [1, 2]. This binding event triggers the phosphorylation of immunoreceptor tyrosine-based activation motifs (ITAMs) within the CD3 complex, initiating a downstream signaling pathway that results in T-cell activation, proliferation, and the induction of apoptosis in the target cell [3, 5].