APEX1 and hepatocellular carcinoma: The present study aimed to evaluate the synergistic efficacy of using LCB in combination with FnC60 to prevent diethylnitrosamine (DEN)-induced HCC by assessing DNA fragmentation, oxidative DNA damage (8-hydroxy-2′-deoxyguanosine levels), mRNAs expression of different proapoptotic and anti-apoptotic markers, and mRNAs and protein expression of APE1/Ref-1 and CDK-4.