The Study on Angiotensin II Induced-ferroptosis in Vascular Endothelial Cells
Abstract Background: To verify the effect of Angiotensin II on ferroptosis in vascular endothelial cells and clarify the related mechanism.Methods: HUVECs were evaluated for p53, P21, ALOX12, VEGF, MDA, GSH. Molecular marker impact upon AngII-induced ferroptosis was evaluated with students’ t-test,one-way analysis of variance (ANOVA).Results: As the concentration of Ang II increased,the level of ALOX12, P53, GSH and MDA increased in HUVECs. The expression of VEGFA in HUVECs is negatively correlated with dose of Ang II. Incubation of HUVECs in AngII and valsartan for 48hr reduces ALOX12, P21, GSH and MDA. Compared with the single AngII group, ALOX12, P21, GSH and MDA in valsartan group was decreased significantly(p=0.000). In pifithrin-α hydrobromide-treated, ALOX12, P21, GSH and MDA was reduced significantly, as compared to valsartan group(p=0.000). The most larger reduction in ALOX12, P21,GSH and MDA was pifithrin - α hydrobromide combined with valsartan group. In contrast, the expression of VEGFA increased significantly after HUVECs were treated with pifithrin - α hydrobromide and valsartan(p=0.000).Conclusions: AngII can induce ferroptosis of vascular endothelial cells in a dose-dependent manner. The mechanism of AngII-induced ferroptosis may be regulated through the signal axis of ATR1,2-p53-ALOX12.