CCR8 is highly expressed on immunosuppressive regulatory T cells (Tregs) in various solid tumors, making it a potential target to enhance antitumor immunity and the efficacy of cancer therapies, including checkpoint inhibitors. However, the impact of CCR8 expression on the Treg phenotype and its role in cancer progression remain unclear.

Current anticancer approaches, such as antibody or CAR T-cell therapies, rely on targeting tumor-associated antigens rather than tumor-specific antigens, with the consequent on-target, off-tumor effects.

Traditional neoantigen prediction methods primarily rely on HLA-peptide binding databases, often producing false positives. This challenge highlights the need for improved strategies to identify truly immunogenic neoantigens. Neoantigen-based cancer vaccines have shown promising efficacy in recent clinical trials for treating solid tumors, offering a potential solution.

Both IL-15 and IL-2 are good options for cancer therapy, but IL-15 is considered superior due to lower vascular endothelial toxicity, stronger ability to expand natural killer and CD8+ T cells and weaker stimulation of T regulatory cells, but it has a short half-life and exerts severe adverse effects.