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Title: Induction of Apoptosis and Inhibition of EGFR/NF-κB Signaling Are Associated With Regorafenib-sensitized Non-small Cell Lung Cancer to Cisplatin. Author: Wu JY, Weng YS, Chiou YC, Hsu FT, Chiang IT. Journal: In Vivo; 2021; 35(5):2569-2576. PubMed ID: 34410944. Abstract: BACKGROUND/AIM: The combination of regorafenib with cisplatin/pemetrexed has indicated controllable safety and encouraging antitumor activity in non-small cell lung cancer (NSCLC) patients. However, the anti-NSCLC effects and action mechanisms of regorafenib combined with cisplatin is ambiguous. The major goal of the study was to study the inhibitory effects and action mechanisms of regorafenib combined with cisplatin in NSCLC cells. MATERIALS AND METHODS: Cell viability, flow cytometry, immunofluorescence staining, western blotting, migration, and invasion assays were employed to verify the anti-NSCLC effects and mechanisms of regorafenib in combination with cisplatin. RESULTS: Cisplatin-induced epidermal growth factor receptor (EGFR)/nuclear factor κB (NF-κB) signaling was effectively inhibited by regorafenib treatment. Regorafenib, erlotinib (EGFR inhibitor) and QNZ (NF-κB inhibitor) may all enhance the cytotoxicity effect of cisplatin. The invasion ability was effectively decreased by combination treatment. Caspase-dependent and -independent apoptosis was activated by cisplatin combined with regorafenib. CONCLUSION: Apoptosis induction and EGFR/NF-κB inactivation correlate with regorafenib-enhanced anti-NSCLC efficacy of cisplatin. This study provides evidence of the therapeutic efficacy of regorafenib in combination with cisplatin on NSCLC.[Abstract] [Full Text] [Related] [New Search]