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- W2405128081 abstract "Reperfusion injury can exacerbate tissue damage in ischemic stroke, but little is known about the mechanisms linking ROS to stroke severity. Here, we tested the hypothesis that protein methionine oxidation potentiates NF-κB activation and contributes to cerebral ischemia/reperfusion injury. We found that overexpression of methionine sulfoxide reductase A (MsrA), an antioxidant enzyme that reverses protein methionine oxidation, attenuated ROS-augmented NF-κB activation in endothelial cells, in part, by protecting against the oxidation of methionine residues in the regulatory domain of calcium/calmodulin-dependent protein kinase II (CaMKII). In a murine model, MsrA deficiency resulted in increased NF-κB activation and neutrophil infiltration, larger infarct volumes, and more severe neurological impairment after transient cerebral ischemia/reperfusion injury. This phenotype was prevented by inhibition of NF-κB or CaMKII. MsrA-deficient mice also exhibited enhanced leukocyte rolling and upregulation of E-selectin, an endothelial NF-κB–dependent adhesion molecule known to contribute to neurovascular inflammation in ischemic stroke. Finally, bone marrow transplantation experiments demonstrated that the neuroprotective effect was mediated by MsrA expressed in nonhematopoietic cells. These findings suggest that protein methionine oxidation in nonmyeloid cells is a key mechanism of postischemic oxidative injury mediated by NF-κB activation, leading to neutrophil recruitment and neurovascular inflammation in acute ischemic stroke." @default.
- W2405128081 created "2016-06-24" @default.
- W2405128081 creator A5005896135 @default.
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- W2405128081 date "2016-05-19" @default.
- W2405128081 modified "2023-10-09" @default.
- W2405128081 title "Protein methionine oxidation augments reperfusion injury in acute ischemic stroke" @default.
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- W2405128081 doi "https://doi.org/10.1172/jci.insight.86460" @default.
- W2405128081 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4902298" @default.
- W2405128081 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/27294204" @default.
- W2405128081 hasPublicationYear "2016" @default.
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