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Photosensitizer-induced self-assembly of antigens as nanovaccines for cancer immunotherapy.

Herein, the photosensitizer indocyanine green (ICG) is used to induce the self-assembly of antigens to form nanovaccines. Under near-infrared (NIR) laser irradiation, reactive oxygen species can be generated by nanovaccines to disrupt the membranes of endo/lysosomes, which helps to release antigens into the cytosol efficiently, thereby enhancing antigen cross-presentation and anti-cancer immunity. To the best of our knowledge, this study represents the first example of ICG as a biocompatible adjuvant to improve cancer vaccine efficacy.