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Condition: Stroke
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Total 302 results found since Jan 2013.
Anti ‐inflammatory effects of ADAMTS‐4 in a mouse model of ischemic stroke
ADAMTS‐4 (a disintegrin and metalloproteinase with thrombospondin motifs type 4) is a metalloprotease capable to degrade chondroitin sulfate proteoglycans leading to cartilage destruction during arthritis or to neuroplasticity during spinal cord injury (SCI). Although ADAMTS‐4 is an inflammatory‐regulated enzyme, its role during inflammation has never been investigated. The aim of this study was to investigate the role of ADAMTS‐4 in neuroinflammation. First, we evidenced an increase of ADAMTS‐4 expression in the ischemic brain hemisphere of mouse and human patients suffering from ischemic stroke. Then, we descri...
Source: Glia - June 14, 2016 Category: Neurology Authors: Sighild Lemarchant, Hiramani Dunghana, Yuriy Pomeshchik, Henri Leinonen, Natalia Kolosowska, Paula Korhonen, Katja M Kanninen, Teresa Garc ía‐Berrocoso, Joan Montaner, Tarja Malm, Jari Koistinaho Tags: Research Article Source Type: research
Suppression of PKC-α attenuates TNF-α-evoked cerebral barrier breakdown via regulations of MMP-2 and plasminogen–plasmin system
In conclusion, specific inhibition of PKC-α in cerebral conditions associated with exaggerated release of pro-inflammatory cytokines, notably TNF-α may be of considerable therapeutic value and help maintain endothelial cell viability, appropriate cytoskeletal structure and basement membrane.
Source: Biochimica et Biophysica Acta (BBA) Molecular Basis of Disease - May 21, 2016 Category: Molecular Biology Source Type: research
Clinacanthus nutans Protects Cortical Neurons Against Hypoxia-Induced Toxicity by Downregulating HDAC1/6
This study further opens a new avenue for the use of herbal medicines to regulate epigenetic control of brain injury.
Source: NeuroMolecular Medicine - May 9, 2016 Category: Neurology Source Type: research
Nrf2/antioxidant defense pathway is involved in the neuroprotective effects of Sirt1 against focal cerebral ischemia in rats after hyperbaric oxygen preconditioning.
Abstract
Sirtuin 1 (Sirt1) is a class III histone deacetylase involved in neuroprotection induced by hyperbaric oxygen preconditioning (HBO-PC) in animal models of ischemia. However, the underlying mechanisms remain to be illustrated. In the present study, rats exposed to middle cerebral artery occlusion (MCAO) were used to establish an ischemic stroke model. The infarct volume ratio, neurobehavioral score, and expressions of Sirt1, nuclear factor erythroid 2-related factor 2 (Nrf2), heme oxygenase 1 (HO-1), and superoxide dismutase 1 (SOD1) were evaluated at 7days after reperfusion, and the level of malondialdehy...
Source: Behavioural Brain Research - April 26, 2016 Category: Neurology Authors: Xue F, Huang JW, Ding PY, Zang HG, Kou ZJ, Li T, Fan J, Peng ZW, Yan WJ Tags: Behav Brain Res Source Type: research
A Single-Nucleotide Polymorphism in 3'-Untranslated Region of Endothelin-1 Reduces Risk of Dementia After Ischemic Stroke.
CONCLUSIONS Our study demonstrated the pathogenesis mechanism during the development of dementia after ischemic stroke by investigating the relationship between miR-125a and its target ET-1, promising a potential pathological solution for post-stroke dementia in the future.
PMID: 27106952 [PubMed - as supplied by publisher]
Source: Medical Science Monitor - April 25, 2016 Category: Research Tags: Med Sci Monit Source Type: research
Drp‐1, a potential therapeutic target for brain ischaemic stroke
Conclusions and ImplicationsOur findings that Drp‐1 increases the resistance of neurons of hippocampal CA3 affected by global ischaemia and contributes to the tolerance conferred by IPC highlight Drp‐1 as a potential therapeutic target for brain ischaemic stroke.
Source: British Journal of Pharmacology - April 6, 2016 Category: Drugs & Pharmacology Authors: W Zuo, P F Yang, J Chen, Z Zhang, N H Chen Tags: RESEARCH PAPER Source Type: research
The Role of Staufen1 in Aberrant RNA Metabolism in SCA2 (P6.396)
Conclusions: Our results unravel a novel function for Staufen1 in aberrant RNA processing events and indicate its role in SCA2 pathogenesis. Our results further support a role for aberrant RNA metabolism in neurodegeneration thereby revealing its potential as a therapeutic target. Study Supported by: This work was supported by Grants RO1NS33123 and RC4NS073009 from the National Institutes of Neurological Disorders and Stroke to SMP.Disclosure: Dr. Paul has nothing to disclose. Dr. Dansithong has nothing to disclose. Dr. Figueroa has nothing to disclose. Dr. Scoles has nothing to disclose. Dr. Pulst has received personal co...
Source: Neurology - April 3, 2016 Category: Neurology Authors: Paul, S., Dansithong, W., Figueroa, K., Scoles, D., Pulst, S. Tags: Movement Disorders: Spinocerebellar Ataxias Source Type: research
GPER expressed on microglia mediates the anti‐inflammatory effect of estradiol in ischemic stroke
ConclusionsOur studies have suggested that GPER expressed on microglia mediated the anti‐inflammatory effect of estradiol after ischemic stroke. Our studies could potentially help to develop more specific drugs to manage inflammation postischemic stroke.
GPER was highly expressed in activated microglia after ischemia and estradiol. The specific GPER agonist G1 could inhibit the secretion of proinflammatory cytokines including IL‐1β and TNF‐α, which the anti‐inflammatory effect of G1 and E2 were both abolished by the specific GPER antagonist G15.
Source: Brain and Behavior - March 21, 2016 Category: Neurology Authors: Tian‐Zhi Zhao, Qian Ding, Jun Hu, Shi‐Ming He, Fei Shi, Lian‐Ting Ma Tags: Original Research Source Type: research
Nuclear translocation of histone deacetylase 4 induces neuronal death in stroke.
Abstract
Mounting evidence suggests that epigenetic modifications play critical roles in the survival/death of stressed neurons. Chief among these modifications is the deacetylation of histones within the chromatin by histone deacetylases (HDACs). HDAC4 is highly expressed in neurons and is usually trapped in cytosol. However, tightly regulated signal-dependent shuttling of this molecule between cytosol and nucleus occurs. Here, we studied the intracellular trafficking of HDAC4 and regulatory mechanisms during stroke. HDAC4 translocated from the cytosol into the nucleus of neurons in response to stroke induced by ...
Source: Neurobiology of Disease - March 8, 2016 Category: Neurology Authors: Yuan H, Denton K, Liu L, Li XJ, Benashski S, McCullough L, Li J Tags: Neurobiol Dis Source Type: research
Drp‐1, a potential therapeutic target for brain ischemic stroke
Conclusions and ImplicationsOur findings that Drp‐1 may increase the resistance of neurons of hippocampal CA3 affected by global ischemia and the tolerance conferred by IPC highlight Drp‐1 as a potential target for translocation to effective therapy for brain ischemic stroke.
Source: British Journal of Pharmacology - February 24, 2016 Category: Drugs & Pharmacology Authors: W Zuo, P F Yang, J Chen, Z Zhang, N H Chen Tags: RESEARCH PAPER Source Type: research
Lipoxin A4 Reduces Inflammation Through Formyl Peptide Receptor 2/p38 MAPK Signaling Pathway in Subarachnoid Hemorrhage Rats Basic Sciences
Conclusions—
Exogenous LXA4 inhibited inflammation by activating FPR2 and inhibiting p38 after SAH. LXA4 may serve as an alternative treatment to relieve early brain injury after SAH.
Source: Stroke - January 25, 2016 Category: Neurology Authors: Guo, Z., Hu, Q., Xu, L., Guo, Z.-N., Ou, Y., He, Y., Yin, C., Sun, X., Tang, J., Zhang, J. H. Tags: Animal Models of Human Disease Basic Sciences Source Type: research
Leukemia Inhibitory Factor Protects Neurons from Ischemic Damage via Upregulation of Superoxide Dismutase 3
Abstract
Leukemia inhibitory factor (LIF) has been shown to protect oligodendrocytes from ischemia by upregulating endogenous antioxidants. The goal of this study was to determine whether LIF protects neurons during stroke by upregulating superoxide dismutase 3 (SOD3). Animals were administered phosphate-buffered saline (PBS) or 125 μg/kg LIF at 6, 24, and 48 h after middle cerebral artery occlusion or sham surgery. Neurons were isolated from rat pups on embryonic day 18 and used between 7 and 15 days in culture. Cells were treated with LIF and/or 10 μM Akt inhibitor IV with PBS and 0.1 % DMSO acting as veh...
Source: Molecular Neurobiology - January 9, 2016 Category: Neurology Source Type: research
Upregulating the Expression of Survivin-HBXIP Complex Contributes to the Protective Role of IMM-H004 in Transient Global Cerebral Ischemia/Reperfusion
Abstract
IMM-H004, a 3-piperazinylcoumarin compound derived from coumarin, has been proved effective against CA1 cell loss and spatial learning impairments resulting from transient global ischemia/reperfusion (TGCI/R), while the mechanism is still largely unknown. Here, we confirmed that treatment of rats with IMM-H004 immediately after TGCI/R ameliorated delayed neuronal death (DND) in the CA1 of hippocampus and cortex. Further study suggested that IMM-H004 contributed to the expression of antiapoptotic protein survivin through the activation of PI3K-dependent protein kinase B (PKB/Akt), which led to the phosphor...
Source: Molecular Neurobiology - January 7, 2016 Category: Neurology Source Type: research
Andrographolide stimulates p38 mitogen-activated protein kinase-nuclear factor erythroid-2-related factor 2-heme oxygenase 1 signaling in primary cerebral endothelial cells for definite protection against ischemic stroke in rats.
In conclusion, andrographolide increased Nrf2-HO-1 expression through p38 MAPK regulation, confirming that it provides protection against MCAO-induced brain injury. These findings provide strong evidence that andrographolide could be a therapeutic agent for treating ischemic stroke or neurodegenerative diseases.
PMID: 26746802 [PubMed - as supplied by publisher]
Source: Translational Research : the journal of laboratory and clinical medicine - December 17, 2015 Category: Laboratory Medicine Authors: Yen TL, Chen RJ, Jayakumar T, Lu WJ, Hsieh CY, Hsu MJ, Yang CH, Chang CC, Lin YK, Lin KH, Sheu JR Tags: Transl Res Source Type: research
siRNA mediated down-regulation of Sprouty2/4 diminishes ischemic brain injury
In this study, siRNAs directed against Sprouty2 and -4 were stereotactically injected along with the vasoconstrictive peptide endothelin-1 to create cortical infarcts in the adult rat brain. A single injection of Sprouty2/4 siRNAs (25μM each) significantly decreased Spry2 and Spry4 mRNA levels two days later and diminished the size of the injury area in the subchronic phase following vasoconstriction. Reducing Spry2/4 genetically in mice is neuroprotective and stimulates injury-induced astrogliosis which limits neuronal cell death and lesion size. The present results are consistent with the established functions of negati...
Source: Neuroscience Letters - December 4, 2015 Category: Neuroscience Source Type: research
