MgIG exerts therapeutic effects on crizotinib-induced hepatotoxicity by limiting ROS-mediated autophagy and...

Crizotinib (CRIZO) has been widely employed to treat non-small-cell lung cancer. However, hepatic inflammatory injury is the major toxicity of CRIZO, which limits its clinical application, and the underlying mechanism of CRIZO-induced hepatotoxicity has not been fully explored. Herein, we used cell counting kit-8 assay and flow cytometry to detect CRIZO-induced cytotoxicity on human hepatocytes (HL-7702). CRIZO significantly reduced the survival rate of hepatocytes in a dose-dependent manner. Furthermore, the reactive oxygen species (ROS) assay kit showed that CRIZO treatment strongly increased the level of ROS. In addition, CRIZO treatment caused the appearance of balloon-like bubbles and autophagosomes in HL-7702 cells. Subsequently, Western blotting, quantitative real-time PCR and ELISA assays revealed that ROS-mediated pyroptosis and autophagy contributed to CRIZO-induced hepatic injury. Based on the role of ROS in CRIZO-induced hepatotoxicity, magnesium isoglycyrrhizinate (MgIG) was used as an intervention drug. MgIG activated the Nrf2/HO-1 signalling pathway and reduced ROS level. Additionally, MgIG suppressed hepatic inflammation by inhibiting NF-κB activity, thereby reducing CRIZO-induced hepatotoxicity. In conclusion, CRIZO promoted autophagy activation and pyroptosis via the accumulation of ROS in HL-7702 cells. MgIG exerts therapeutic effects on CRIZO-induced hepatotoxicity by decreasing the level of ROS.