The clinical insights gained from T-cell receptor sequencing in revealing the immune characteristics of liver cancer staging
T lymphocytes play a crucial role in human adaptive immunity by recognizing antigens major histocompatibility complex (MHC) molecules through specific T-cell receptors (TCRs) on their surface. 95% of T cells have TCRs composed of α and β peptide chains connected by disulfide bonds, forming an α/β heterodimer. Each chain consists of constant and variable domains. TCR diversity arises from the rearrangement of the variable (V), diversity (D), and joining (J) gene segments of the peptide chains, along with random nucleotide additions or deletions.