Objective:To investigate the role and mechanism of mTOR in sorafenib-ameliorated liver fibrosis by inducing hepatic stellate cells(HSC)ferroptosis.Methods:The liver fibrosis models of C57BL/6 male mice were induced wi...Objective:To investigate the role and mechanism of mTOR in sorafenib-ameliorated liver fibrosis by inducing hepatic stellate cells(HSC)ferroptosis.Methods:The liver fibrosis models of C57BL/6 male mice were induced with carbon tetrachloride(CCl4)and randomly divided into normal group,model group,and sorafenib low(2.5 mg/kg),medium(5 mg/kg),and high(10 mg/kg)dose groups.Except for the normal group,the remaining four groups were treated with intraperitoneal injection of CCl4 for 8 weeks to establish liver fibrosis models.In addition,the corresponding concentrations of sorafenib were administered during the fourth week of modeling.Western blot was used to detect the expression of mTOR and p-mTOR protein in liver tissues.In vitro experiments,HSC-T6 cells were activated by PDGFBB and then treated with sorafenib(5μM,10μM,20μM),an mTOR inhibitor and activator.CCK8 was used to detect HSC-T6 cell viability,Western blot detected the protein expression ofα-SMA,COL1α1,GPX4,mTOR and p-mTOR.The levels of serum iron,GSH,and MDA were measured,and the intracellular ROS level was measured by 2',7'-dichlorofluorescein diacetate and dihydroethidium.Results:In vitro results showed that sorafenib significantly decreased the protein expression ofα-SMA,COL1α1,GPX4 and p-mTOR,and decreased the level of GSH and increased the content of iron,MDA and ROS in HSC-T6(P<0.05).Sorafenib(5μM,10μM,20μM)significantly inhibited the cell viability of PDGF-BB-enhanced HSCT6(P<0.05).When mTOR was inhibited,the protein expressions ofα-SMA,COL1α1 and GPX4 and the level of GSH were lower(P<0.05),and the contents of iron,MDA and ROS were further increased(P<0.05).When mTOR was activated,the results were reversed.Conclusion:Sorafenib induced ferroptosis to alleviate liver fibrosis,and inhibition of mTOR further enhanced the effect of sorafenib.展开更多
基金Foundation Project of National Natural Science(81600498)。
文摘Objective:To investigate the role and mechanism of mTOR in sorafenib-ameliorated liver fibrosis by inducing hepatic stellate cells(HSC)ferroptosis.Methods:The liver fibrosis models of C57BL/6 male mice were induced with carbon tetrachloride(CCl4)and randomly divided into normal group,model group,and sorafenib low(2.5 mg/kg),medium(5 mg/kg),and high(10 mg/kg)dose groups.Except for the normal group,the remaining four groups were treated with intraperitoneal injection of CCl4 for 8 weeks to establish liver fibrosis models.In addition,the corresponding concentrations of sorafenib were administered during the fourth week of modeling.Western blot was used to detect the expression of mTOR and p-mTOR protein in liver tissues.In vitro experiments,HSC-T6 cells were activated by PDGFBB and then treated with sorafenib(5μM,10μM,20μM),an mTOR inhibitor and activator.CCK8 was used to detect HSC-T6 cell viability,Western blot detected the protein expression ofα-SMA,COL1α1,GPX4,mTOR and p-mTOR.The levels of serum iron,GSH,and MDA were measured,and the intracellular ROS level was measured by 2',7'-dichlorofluorescein diacetate and dihydroethidium.Results:In vitro results showed that sorafenib significantly decreased the protein expression ofα-SMA,COL1α1,GPX4 and p-mTOR,and decreased the level of GSH and increased the content of iron,MDA and ROS in HSC-T6(P<0.05).Sorafenib(5μM,10μM,20μM)significantly inhibited the cell viability of PDGF-BB-enhanced HSCT6(P<0.05).When mTOR was inhibited,the protein expressions ofα-SMA,COL1α1 and GPX4 and the level of GSH were lower(P<0.05),and the contents of iron,MDA and ROS were further increased(P<0.05).When mTOR was activated,the results were reversed.Conclusion:Sorafenib induced ferroptosis to alleviate liver fibrosis,and inhibition of mTOR further enhanced the effect of sorafenib.
