PKR deficiency delays vascular aging via inhibiting GSDMD-mediated endothelial cell hyperactivation.

ABSTRACT: Vascular aging is an independent risk factor for cardiovascular diseases, but the regulatory mechanism is not clearly understood. In this study, we found that endothelial PKR activity is elevated in aging aorta tissues, which is accompanied with increased endothelial cell hyperactivation, IL-1β and HMGB1 release and vascular smooth muscle cell (VSMC) phenotype transforming. Global knockout of PKR exhibits significantly delayed vascular aging compared to wild-type mice at the same age. In vitro, using PKR siRNA or the cell hyperactivation inhibitor glycine or disulfiram can effectively inhibit H₂O₂ or palmitic acid-induced endothelial cell hyperactivation, IL-1β and HMGB1 release and co-cultured VSMC phenotype transforming. These results demonstrate that endothe

SUBMITTER: Peng Z 

PROVIDER: S-EPMC9860489 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature