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Two types of calcium channels regulating activation of proline-rich tyrosine kinase 2 induced by transient brain ischemia in rat hippocampus.
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Tyrosine phosphorylation is an important means for regulating post-ischemic signal transduction. In this article, brain ischemia was induced by four-vessel occlusion, and the effect of ischemia/reperfusion on proline-rich tyrosine kinase 2 (Pyk2) was studied. Tyrosine phosphorylation of Pyk2 in
Neuroprotective effects of protein tyrosine phosphatase 1B inhibitor on cerebral ischemia/reperfusion in mice.
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Akt (Protein kinase B, PKB), a serine/threonine kinase, plays a critical role in cell development, growth, and survival. Akt phosphorylation mediates a neuroprotective effect against ischemic injury. Recently, a protein-tyrosine phosphatase-1B (PTP1B) inhibitor (KY-226) was developed to elicit
A protein tyrosine phosphatase inhibitor accelerates angiogenesis in a rat model of hindlimb ischemia.
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Vascular endothelial growth factor (VEGF) receptor-2 (KDR/flk-1) has a tyrosine kinase domain and, once activated, induces the autophosphorylation of the tyrosine residues. The phosphorylated KDR/flk-1 can be a substrate for intracellular protein tyrosine phosphatases (PTPs). In the present study,
BAY61-3606 protects kidney from acute ischemia/reperfusion injury through inhibiting spleen tyrosine kinase and suppressing inflammatory macrophage response
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Acute kidney injury (AKI) is a highly prevalent clinical syndrome with high mortality and morbidity. Previous studies indicated that inflammation promotes tubular damage and plays a key role in AKI progress. Spleen tyrosine kinase (Syk) has been linked to macrophage-related inflammation in AKI. Up
Proteomic analysis of protein tyrosine nitration after ischemia reperfusion injury: mitochondria as the major target.
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Endothelial nitric oxide synthase-derived NO and its derivative, peroxynitrite (ONOO(-)), suppresses oxygen consumption by nitration of mitochondrial proteins after reperfusion. However, very few nitrated proteins are identified to date. In this paper, ischemia/reperfusion (I/R) injury was induced
N-methyl-D-aspartate receptor and L-type voltage-gated Ca2+ channel activation mediate proline-rich tyrosine kinase 2 phosphorylation during cerebral ischemia in rats.
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Cerebral ischemia induces rapid efflux of glutamate into the extracellular space contributing to excessive activation of glutamate receptors in postsynaptic cells, particularly N-methyl-D-aspartate (NMDA) receptors, which triggers the neuron lesion through calcium overload. Our studies indicated
Platelets activated by collagen through the immunoreceptor tyrosine-based activation motif in the Fc receptor gamma-chain play a pivotal role in the development of myocardial ischemia-reperfusion injury.
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Platelet activation and the formation of platelet microaggregates in coronary vessels play pivotal roles in myocardial ischemia and reperfusion injury. The Fc receptor gamma-chain (FcR gamma) is coexpressed with glycoprotein (GP) VI, forming a platelet collagen receptor, and the activation of
Stimulation of protein-tyrosine phosphorylation in gerbil hippocampus after global forebrain ischemia.
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Tyrosine phosphorylation in the gerbil hippocampus after a transient ischemia was analyzed by immunoblotting and immunohistochemistry. In control hippocampus, the phosphotyrosine was detected in many proteins of 165 to 10 kDa and the immunostain showed a distinct distribution. The ischemic insult
Ischemia-reperfusion decreases protein tyrosine phosphorylation and p38 mitogen-activated protein kinase phosphorylation in rat lung transplants.
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BACKGROUND
Dramatic alterations of protein tyrosine phosphorylation have been found during the ischemia-reperfusion (IR) period of human lung transplantation. IR also induces activation of p38 mitogen-activated protein kinase (p38) in the heart and kidney. The objective of the present study was to
[Effect of ischemia/reperfusion on the phosphorylation of synaptosomal tyrosine of hippocampus of Mongolian gerbils].
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The effects of ischemia/reperfusion on the levels of protein tyrosine phosphorylation in the synaptosome of gerbil hippocampus and the effects of three drugs, ketamine (KT), a noncompetitive antagonist of NMDA receptor, nifedipine (ND), a voltage gated calcium channel (VGCC) antagonist and
Spleen tyrosine kinase inhibition prevents tissue damage after ischemia-reperfusion.
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Reperfusion injury to tissue following an ischemic event occurs as a consequence of an acute inflammatory response that can cause significant morbidity and mortality. Components of both the innate (complement, immunoglobulin, monocytes, and neutrophils) and adaptive (B and T lymphocytes) immune
Increased tyrosine phosphorylation of alpha(1C) subunits of L-type voltage-gated calcium channels and interactions among Src/Fyn, PSD-95 and alpha(1C) in rat hippocampus after transient brain ischemia.
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It has been reported that the Src family kinases-mediated tyrosine phosphorylation of alpha(1C) subunits of L-type voltage-gated calcium channels (L-VGCCs) potentiates the channel currents. In this study, we evaluated the alterations in the tyrosine phosphorylation level of alpha(1C) and in the
Suppression of postsynaptic density protein 95 expression attenuates increased tyrosine phosphorylation of NR2A subunits of N-methyl-D-aspartate receptors and interactions of Src and Fyn with NR2A after transient brain ischemia in rat hippocampus.
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The effects of suppression of postsynaptic density protein 95 (PSD-95) expression on the increased tyrosine phosphorylation of N-methyl-D-aspartate receptor subunit NR2A and interactions of Src and Fyn with NR2A after brain ischemia were investigated by immunoprecipitation and immunoblotting.
Intravitreal injection of specific receptor tyrosine kinase inhibitor PTK787/ZK222 584 improves ischemia-induced retinopathy in mice.
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BACKGROUND
Retinal neovascularisation occurs under the influence of angiogenic factors that are induced by hypoxia, like vascular endothelial growth factor (VEGF), which is one of the major mediators. PTK/ZK inhibits VEGF signal transduction by blocking the tyrosine kinase of all three VEGF
PRL-1, a protein tyrosine phosphatase, is expressed in neurons and oligodendrocytes in the brain and induced in the cerebral cortex following transient forebrain ischemia.
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Protein tyrosine phosphorylation is thought to play an important role in the regulation of neural function. We reported previously that CL100, a cytoplasmic type protein tyrosine phosphatase (PTP), was induced after transient forebrain ischemia. In the present study, changes in the mRNA levels after
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