NuCana plc has announced encouraging new data on its investigational drug NUC-7738, studied in combination with PD-1 inhibitors. The company presented these results at the European Society for Medical Oncology (ESMO) Congress 2025. The research used primary patient-derived organoids and autologous tumor-infiltrating lymphocytes from renal cell carcinoma $(RCC)$ patients, demonstrating that NUC-7738 may enhance the effectiveness of PD-1 inhibitors by increasing tumor cell death. The findings support the mechanism of action of NUC-7738 and align with ongoing results from the Phase 1/2 NuTide:701 clinical study, which is evaluating NUC-7738 in patients with PD-1 inhibitor-resistant melanoma. NuCana is currently recruiting additional patients for the NuTide:701 study and plans to discuss the data with the U.S. Food and Drug Administration to determine the optimal registration strategy for potential marketing approval.