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staurosporine/accident vasculaire cérébral
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Hypersensitivity of A8344G MERRF mutated cybrid cells to staurosporine-induced cell death is mediated by calcium-dependent activation of calpains.
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Mutations in the mitochondrial DNA can lead to the development of mitochondrial diseases such as Myoclonic Epilepsy with Ragged Red Fibers (MERRF) or Mitochondrial Encephalomyopathy, Lactic Acidosis and Stroke-like episodes (MELAS). We first show that human 143B-derived cybrid cells harboring either
Staurosporine-induced apoptosis in astrocytes is prevented by A1 adenosine receptor activation.
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Astrocyte apoptosis occurs in acute and chronic pathological processes at the central nervous system and the prevention of astrocyte death may represent an efficacious intervention in protecting neurons against degeneration. Our research shows that rat astrocyte exposure to 100 nM staurosporine for
Staurosporine and H7 attenuate ethanol-induced elevation in [Ca2+]i in cultured canine cerebral vascular smooth muscle cells.
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Chronic exposure of cultured canine cerebral vascular smooth muscle cells to ethanol (10-400 mM) for 1-5 days resulted in significant concentration-dependent elevation in resting intracellular free calcium ([Ca2+]i) levels. Preincubation of these cultured vascular cells with inhibitors of protein
Pro-apoptotic function of GABA-related transcripts following stroke.
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Following cerebral injuries such as stroke, a structural and functional reorganization of the impaired tissue occurs, which is often accompanied by a re-expression of developmental genes. During brain development, embryonic splice variants of the GABA-synthesizing GAD67 gene (collectively termed
Combination therapy in ischemic stroke: synergistic neuroprotective effects of memantine and clenbuterol.
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OBJECTIVE
Although excitotoxic overactivation of glutamate receptors has been identified as a major mechanism of ischemic brain damage, glutamate receptor antagonists failed in stroke trials, in most cases because of limited therapeutic windows or severe adverse effects. Therefore, we chose
Cerebrovascular alterations in protein kinase C-mediated constriction in stroke-prone rats.
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OBJECTIVE
Cerebrovascular pressure-dependent constriction may involve the smooth muscle production of diacylglycerol, which could facilitate constriction by activating protein kinase C (PKC). A dysfunctional PKC system could promote the loss of pressure-dependent constriction. We attempted to
Implication of PTEN in production of reactive oxygen species and neuronal death in in vitro models of stroke and Parkinson's disease.
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Oxidative stress plays crucial role in the pathogenesis of neurodegenerative diseases. However, the precise mechanism for an increased production of reactive oxygen species (ROS) under pathological conditions is not yet fully understood. We have recently demonstrated an implication of phosphatase
Tanshinone IIB, a primary active constituent from Salvia miltiorrhiza, exerts neuroprotective effect via inhibition of neuronal apoptosis in vitro.
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Tanshinone IIB (TSB) is a major active constituent of the roots of Salvia miltiorrhiza (Danshen) widely used in the treatment of stroke and coronary heart disease in Asian countries. This study investigated the in vitro neuroprotective effects of TSB and the underlying mechanism. Co-treatment with
A secretory phospholipase A2-mediated neuroprotection and anti-apoptosis.
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BACKGROUND
Phospholipase A2 liberates free fatty acids and lysophospholipids upon hydrolysis of phospholipids and these products are often associated with detrimental effects such as inflammation and cerebral ischemia. The neuroprotective effect of neutral phospholipase from snake venom has been
Effects of the prostanoid EP3-receptor agonists M&B 28767 and GR 63799X on infarct size caused by regional myocardial ischaemia in the anaesthetized rat.
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1. This study investigates the effects of two agonists of the prostanoid EP3-receptor (M&B 28767 and GR 63799X) on the infarct size caused by regional myocardial ischaemia and reperfusion in the anaesthetized rat. 2. One hundred and sixty-seven, male Wistar rats were anaesthetized (thiopentone, 120
Multiparameter measurement of caspase 3 activation and apoptotic cell death in NT2 neuronal precursor cells using high-content analysis.
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Caspase activation is a component of a number of neurodegenerative disorders, including stroke. In this study, the authors describe a multiplexed assay for caspase 3 activation, nuclear condensation, and cell viability in a neuronal precursor cell line Ntera-2, injured with staurosporine and
Bax inhibitor-1 protects neurons from oxygen-glucose deprivation.
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Bax ihibitor-1 (BI-1) has been characterized as an inhibitor of Bax-induced cell death in plants and various mammalian cell systems. To explore the function of BI-1 in neurons, we overexpressed BI-1 tagged to HA or GFP in rat nigral CSM14.1 and human SH-SY5Y neuroblastoma cells. Stable BI-1
DIDS prevents ischemic membrane degradation in cultured hippocampal neurons by inhibiting matrix metalloproteinase release.
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During stroke, cells in the infarct core exhibit rapid failure of their permeability barriers, which releases ions and inflammatory molecules that are deleterious to nearby tissue (the penumbra). Plasma membrane degradation is key to penumbral spread and is mediated by matrix metalloproteinases
Mechanism of the myelin basic protein-induced insulin and glucagon release from isolated rat pancreatic islets.
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The central nervous system myelin basic protein (MBP) stimulates the release of several peptide hormones including insulin and glucagon. This could be associated with the development of hyperglycaemia in neurological disorders such as stroke, in which MBP is known to leak into blood circulation. In
Protection of mature oligodendrocytes by inhibitors of caspases and calpains.
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Mature mouse oligodendrocytes (OLs) are susceptible to death in demyelinating diseases such as multiple sclerosis and in brain injury following neurotrauma, ischemia, or stroke. To understand mechanisms leading to death of mature OLs and develop strategies for protection, we utilized cultures of
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