Identification and affinity enhancement of T-cell receptor targeting a KRAS^G12V cancer neoantigen.

ABSTRACT: Neoantigens derived from somatic mutations in Kirsten Rat Sarcoma Viral Oncogene Homolog (KRAS), the most frequently mutated oncogene, represent promising targets for cancer immunotherapy. Recent research highlights the potential role of human leukocyte antigen (HLA) allele A*11:01 in presenting these altered KRAS variants to the immune system. In this study, we successfully generate and identify murine T-cell receptors (TCRs) that specifically recognize KRAS_8-16^G12V from three predicted high affinity peptides. By determining the structure of the tumor-specific 4TCR2 bound to KRAS^G12V-HLA-A*11:01, we conduct structure-based design to create and evaluate TCR variants with markedly enhanced affinity, up to 15.8-fold. This high-affinity TCR mutant, which invol

SUBMITTER: Zhang M 

PROVIDER: S-EPMC11058820 | biostudies-literature | 2024 Apr

REPOSITORIES: biostudies-literature