The role of natural killer (NK) cells in tumor metastasis and immunotherapy response has also been investigated, revealing that IRF4 expression in NK precursors can predetermine their exhaustion during tumor progression (ref: Zhang doi.org/10.1038/s41590-025-02176-w/). In a phase I study, the combination of PD-1 and TIM-3 inhibitors showed promise in enhancing responses in advanced melanoma patients, indicating that dual checkpoint blockade may be a viable strategy for improving outcomes (ref: Davar doi.org/10.1158/1078-0432.CCR-25-0884/). Additionally, innovative approaches such as self-driving microrobots for targeted drug delivery have been developed to enhance the efficacy of immunotherapy by delivering immune activators directly to tumor sites, thereby improving therapeutic outcomes (ref: Huang doi.org/10.1021/acsnano.4c15868/). Overall, these studies underscore the dynamic landscape of melanoma immunotherapy, highlighting the importance of combining traditional and novel strategies to enhance patient outcomes.