PRKDC and hepatocellular carcinoma: NU7026 and NU7441, two DNA-PKcs inhibitors, have been clarified to improve the efficacy of various chemotherapeutic drugs, such as etoposide, cisplatin and doxorubicin in some types of solid tumors, including colon cancer, non-small cell lung cancer (NSCLC), leukemia or HCC [36 - 38].