2026/01/01 by Daniel Hwang, Molly C. Erdman, Santosh Adhikari +18 · 1 voice
Biochemistry, Genetics and Molecular Biology · Immunology and Microbiology · Medicine · #CAR-T cell therapy research #Immunotherapy and Immune Responses #vaccines and immunoinformatics approaches
paper · doi:10.1126/sciadv.aeb0821
openalex created_date 2026/01/01 · openalex publication_date 2026/01/01 · openalex updated_date 2026/08/01
Epitopic peptides presented by class-I human leukocyte antigen (HLA-I) proteins provide the basis of immune surveillance by T cells. Conversely, reduced surface HLA-I expression is a hallmark of immune evasion by latent viral infections and cancer, which confounds the identification of peptide antigens and neoantigens. Here, we outline a system (HLA-Shuttle) for in vitro manipulation of cells with engineered components of the HLA-I processing machinery to confer a continuum of chaperoning activity throughout their trafficking pathway. HLA-Shuttle restores antigen presentation in immunologically cold neuroblastoma cells, enabling identification of multiple tumor-associated antigens with therapeutic potential. Cellular trafficking assays and single-particle tracking reveal a global stabilization of HLA-I molecules, extension of their cell-surface lifetime and microdomain formation. HLA-Shuttle can be used across a range of aberrant cellular states where low antigen expression remains a bottleneck for the identification of endogenous peptide antigens.