Ferrostatin 1 ameliorates UVB‐induced damage of HaCaT cells by regulating ferroptosis

Abstract Ferroptosis, a type of programmed cell death, occurs when there is oxidative stress and lipid peroxides. This condition is marked by lipid peroxidation that relies on iron and the reduction of cellular defences against oxidation. To investigate the effect of UVB irradiation on ferroptosis of human keratinocytes HaCaT cells, the cells were pretreated with Ferrostatin 1 (Fer‐1, 10 μM), an ferroptosis inhibitor and then irradiated with UVB (20 mJ/cm 2 ) for 30 min to detect related indexes of ferroptosis through MTT assay, quantitative real‐time polymerase chain reaction, flow cytometry, reactive oxygen species (ROS) assay, western blotting. Results showed that UVB significantly reduced cell activity, promoted apoptosis and ROS level, whereas Fer‐1 significantly increased cell activity, and reduced apoptosis and ROS level. In addition, UVB significantly reduced levels of ferroptosis‐related proteins and skin barrier‐related proteins, and increased levels of γ‐H2AX and iron, whereas Fer‐1 significantly increased their protein levels, and reduced levels of γ‐H2AX and iron. Conjoint analysis of transcriptomic and proteomic revealed that UVB significantly reduced the levels of TIMP metallopeptidase inhibitor 3 (TIMP3), and coagulation factor II thrombin receptor (F2R), whereas Fer‐1 significantly promoted the levels of TIMP3, and F2R. Therefore, our results indicated that Fer‐1 significantly ameliorates UVB‐induced damage of HaCaT cells by regulating the levels of TIMP3 and F2R.