Por favor, use este identificador para citar o enlazar este Item:http://hdl.handle.net/20.500.12105/17210
Título
Redox Regulation of Mitochondrial Fission Protein Drp1 by Protein Disulfide Isomerase Limits Endothelial Senescence.
Autor(es)
Fecha de publicación
2018-06-19
Cita
Cell Rep. 2018 Jun 19;23(12):3565-3578.
Idioma
Inglés
Tipo de documento
journal article
Resumen
Mitochondrial dynamics are tightly controlled by fusion and fission, and their dysregulation and excess reactive oxygen species (ROS) contribute to endothelial cell (EC) dysfunction. How redox signals regulate coupling between mitochondrial dynamics and endothelial (dys)function remains unknown. Here, we identify protein disulfide isomerase A1 (PDIA1) as a thiol reductase for the mitochondrial fission protein Drp1. A biotin-labeled Cys-OH trapping probe and rescue experiments reveal that PDIA1 depletion in ECs induces sulfenylation of Drp1 at Cys644, promoting mitochondrial fragmentation and ROS elevation without inducing ER stress, which drives EC senescence. Mechanistically, PDIA1 associates with Drp1 to reduce its redox status and activity. Defective wound healing and angiogenesis in diabetic or PDIA1+/- mice are restored by EC-targeted PDIA1 or the Cys oxidation-defective mutant Drp1. Thus, this study uncovers a molecular link between PDIA1 and Drp1 oxidoreduction, which maintains normal mitochondrial dynamics and limits endothelial senescence with potential translational implications for vascular diseases associated with diabetes or aging.
MESH
Cellular Senescence | Mitochondrial Dynamics | Animals | Cell Respiration | Cysteine | Diabetes Mellitus, Type 2 | Dynamins | Endoplasmic Reticulum Stress | Human Umbilical Vein Endothelial Cells | Humans | Mice | Mitochondria | Mutation | Oxidation-Reduction | Procollagen-Proline Dioxygenase | Protein Binding | Protein Disulfide-Isomerases | Reactive Oxygen Species | Wound Healing
Versión en línea
DOI
Aparece en las colecciones
Ficheros en el ítem
- Nombre:
- Redox Regulation of Mitochondr ...
- Tamaño:
- 5.283Mb
- Formato:
- Descripción:
- Artículo