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Caveolin-1-eNOS signaling promotes p190RhoGAP-A nitration and endothelial permeability.
- Source :
-
The Journal of cell biology [J Cell Biol] 2011 May 30; Vol. 193 (5), pp. 841-50. - Publication Year :
- 2011
-
Abstract
- Endothelial barrier function is regulated by adherens junctions (AJs) and caveolae-mediated transcellular pathways. The opening of AJs that is observed in caveolin-1(-/-) (Cav-1(-/-)) endothelium suggests that Cav-1 is necessary for AJ assembly or maintenance. Here, using endothelial cells isolated from Cav-1(-/-) mice, we show that Cav-1 deficiency induced the activation of endothelial nitric oxide synthase (eNOS) and the generation of nitric oxide (NO) and peroxynitrite. We assessed S-nitrosylation and nitration of AJ-associated proteins to identify downstream NO redox signaling targets. We found that the GTPase-activating protein (GAP) p190RhoGAP-A was selectively nitrated at Tyr1105, resulting in impaired GAP activity and RhoA activation. Inhibition of eNOS or RhoA restored AJ integrity and diminished endothelial hyperpermeability in Cav-1(-/-) mice. Thrombin, a mediator of increased endothelial permeability, also induced nitration of p120-catenin-associated p190RhoGAP-A. Thus, eNOS-dependent nitration of p190RhoGAP-A represents a crucial mechanism for AJ disassembly and resultant increased endothelial permeability.
- Subjects :
- Animals
Caveolin 1 deficiency
Cells, Cultured
Humans
Mice
Mice, Inbred C57BL
Mice, Knockout
Nitric Oxide metabolism
Permeability
Peroxynitrous Acid metabolism
Caveolin 1 metabolism
Endothelial Cells metabolism
Nitric Oxide Synthase Type III metabolism
Signal Transduction
rhoA GTP-Binding Protein metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 1540-8140
- Volume :
- 193
- Issue :
- 5
- Database :
- MEDLINE
- Journal :
- The Journal of cell biology
- Publication Type :
- Academic Journal
- Accession number :
- 21624953
- Full Text :
- https://doi.org/10.1083/jcb.201012129