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Virus-based tumour vaccines offer many advantages compared to other antigen-delivering systems. They generate concerted innate and adaptive immune response, and robust CD8+ T cell responses. We engineered a non-replicating pseudotyped influenza virus (S-FLU) to deliver the well-known cancer testis antigen, NY-ESO-1 (NY-ESO-1 S-FLU). Intranasal or intramuscular immunization of NY-ESO-1 S-FLU virus in mice elicited a strong NY-ESO-1-specific CD8+ T cell response in lungs and spleen that resulted in the regression of NY-ESO-1-expressing lung tumour and subcutaneous tumour, respectively. Combined administration with anti-PD-1 antibody, NY-ESO-1 S-FLU virus augmented the tumour protection by reducing the tumour metastasis. We propose that the antigen delivery through S-FLU is highly efficient in inducing antigen-specific CD8+ T cell response and protection against tumour development in combination with PD-1 blockade.

Original publication

DOI

10.7554/eLife.76414

Type

Journal article

Journal

Elife

Publication Date

10/01/2023

Volume

12

Keywords

cancer biology, cancer vaccine, immunology, inflammation, influenza virus, mouse, tumour metastasis, Male, Mice, Animals, Immune Checkpoint Inhibitors, Antigens, Neoplasm, Membrane Proteins, Immunization, Antibodies, Orthomyxoviridae, CD8-Positive T-Lymphocytes