Abstract:Aim To investigate the influences of ginkgetin on the ferroptosis of vascular endothelial cells induced by oxidized low density lipoprotein (ox-LDL) by regulating the nuclear factor erythroid-2 related factor 2 (Nrf2)/solute carrier protein 7 family member 11 (SLC7A11)/glutathione peroxidase 4 (GPX4) signaling pathway. Methods Human umbilical vein cell fusion cells EA.hy926 were grouped into normal control group (normal culture), ox-LDL group (50 mg/L ox-LDL), and ginkgetin low dose group (50 mg/L ox-LDL+10 μmol/L ginkgetin), middle dose group (50 mg/L ox-LDL+20 μmol/L ginkgetin), high dose group (50 mg/L ox-LDL+40 μmol/L ginkgetin), ML385 group (50 mg/L ox-LDL+40 μmol/L ginkgetin+1 μmol/L Nrf2 inhibitor ML385), Erastin group (50 mg/L ox-LDL+40 μmol/L ginkgetin+5 μmol/L SLC7A11 inhibitor Erastin), RSL3 group (50 mg/L ox-LDL+40 μmol/L ginkgetin+0.5 μmol/L GPX4 inhibitor RSL3). Cell viability was detected by tetramethylazolium salt (MTT) method. The kits were applied to detect the levels of cellular superoxide dismutase (SOD), malondialdehyde (MDA), and glutathione (GSH). The intracellular iron content was detected by specific fluorescent probe method. The levels of intracellular reactive oxygen species (ROS) and lipid ROS were detected by 2′, 7′-dichlorofluorescein diacetate (DCFH-DA) fluorescent probe method and boron dipyrrole (BODIPYTM) method; Western blot was applied to detect the protein expressions of cellular Nrf2, SLC7A11, GPX4,4-hydroxynonenoic acid (4-HNE), cyclooxygenase 2 (COX2), and p53. Results Compared with the normal control group, the cell viability, SOD content, GSH content, expressions of Nrf2, SLC7A11 and GPX4 were obviously decreased in the ox-LDL group (P<0.05); the MDA content, Fe2+ content, ROS, lipid ROS, expressions of 4-HNE, COX2, p53 were obviously increased (P<0.05). Compared with the ox-LDL group, the cell viability, SOD content, GSH content, expressions of Nrf2, SLC7A11 and GPX4 were obviously increased in low, middle and high dose groups of ginkgetin (P<0.05); the MDA content, Fe2+ content, ROS, lipid ROS, expressions of 4-HNE, COX2, p53 were obviously decreased (P<0.05). Compared with the high dose ginkgetin group, the ML385 group, Erastin group and RSL3 group attenuated the inhibitory effect of ginkgetin on ox-LDL-induced vascular endothelial cell ferroptosis. Conclusion Ginkgetin inhibits ox-LDL-induced vascular endothelial cell ferroptosis by activating the Nrf2/SLC7A11/GPX4 pathway.