A similar effect was found in other studies, such as Gurung et al. (2023) [25], which showed that PDT with Ce6 as a photosensitizer was able to induce potent local and systemic antitumor immune responses in a murine model of malignant melanoma, further enhanced by the combination with PD-1/PDL-1 inhibitors. This evidence concerns the gene CD274 and melanoma.