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Condition: Ischemic Stroke

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Total 193 results found since Jan 2013.

Calmodulin Kinase IV–dependent CREB activation is required for neuroprotection via NMDA receptor‐PSD95 disruption
This study highlights the importance of maintaining neuronal function following ischaemic injury. Future stroke research should target neurotrophic and pro‐survival signal pathways in the development of novel neuroprotective strategies. We propose that uncoupling NMDA receptors from PSD95 provides neuroprotection from stroke by enhancing Ca2+/Calmodulin‐dependent neurotrophic signalling. Blocking NMDAR‐PSD95 interactions allows enhanced activation of nuclear CaM‐kinase IV and prolonged phosphorylation of the CREB transcription factor, resulting in enhanced neurotrophic transcription. These findings demonstrate the...
Source: Journal of Neurochemistry - March 3, 2013 Category: Neurology Authors: Karen F. S. Bell, Russell J. Bent, Saira Meese‐Tamuri, Alicia Ali, Joan P. Forder, Michelle M. Aarts Tags: Original Article Source Type: research

Activation of STAT3 is involved in neuroprotection by electroacupuncture pretreatment via cannabinoid CB1 receptors in rats.
In conclusion, EA pretreatment enhances STAT3 activation via CB1R to protect against cerebral ischemia, suggesting that STAT3 activation may be a novel target for stroke intervention. PMID: 23880371 [PubMed - as supplied by publisher]
Source: Brain Research - July 20, 2013 Category: Neurology Authors: Zhou H, Zhang Z, Wei H, Wang F, Guo F, Gao Z, Marsicano G, Wang Q, Xiong L Tags: Brain Res Source Type: research

Ischemic neurons activate astrocytes to disrupt endothelial barrier via increasing VEGF expression
This article is protected by copyright. All rights reserved.
Source: Journal of Neurochemistry - November 20, 2013 Category: Neurology Authors: Ying‐Na Li, Rong Pan, Xu‐Jun Qin, Wei‐Lin Yang, Zhifeng Qi, Wenlan Liu, Ke Jian Liu Tags: Original Article Source Type: research

Down-Regulation of miRNA-30a Alleviates Cerebral Ischemic Injury Through Enhancing Beclin 1-Mediated Autophagy.
In this study, the effects of miRNA-30a on ischemic injury in N2A cells and cultured cortical neurons after oxygen glucose deprivation (OGD), and mouse brain with MCAO-induced ischemic stroke were evaluated. The results showed that miRNA-30a expression levels were up regulated in the brain of mice after 6 h MCAO without reperfusion, but significantly down regulated in the peri-infarct region of mice with 1 h MCAO/24 h reperfusion and in N2A cells after 1 h OGD/6-48 h reoxygenation. Both the conversion ratio of microtubule-associated protein 1 light chain 3 (LC3)-II/LC3-I and Beclin 1 protein level increased in N2A cel...
Source: Neurochemical Research - April 26, 2014 Category: Neuroscience Authors: Wang P, Liang J, Li Y, Li J, Yang X, Zhang X, Han S, Li S, Li J Tags: Neurochem Res Source Type: research

IL-8 enhances angiogenesis of human bone marrow mesenchymal stem cells by increasing vascular endothelial growth factor.
In conclusion, IL-8 stimulates VEGF production in hBM-MSCs in part via the PI3K/Akt and MAPK/ERK signal transduction pathways and that administration of IL-8-treated hBM-MSCs increases angiogenesis after stroke. This approach may be used to optimize MSC-based therapies for numerous diseases including stroke, myocardial ischemia, and spinal cord injury. PMID: 24797366 [PubMed - as supplied by publisher]
Source: Cell Biology International - May 5, 2014 Category: Cytology Authors: Hou Y, Ryu CH, Jun JA, Kim SM, Jeong CH, Jeun SS Tags: Cell Biol Int Source Type: research

Upregulation of Hsp72 mediates anoxia/reoxygention neuroprotection in the freshwater turtle via modulation of ROS.
Abstract The neuroprotective role of Hsp72 has been demonstrated in several ischemic/stroke models to occur primarily through mediation of apoptotic pathways, and a number of heat shock proteins are upregulated in animal models capable of extended anoxic survival. In the present study, we investigated the role of Hsp72 on cell death and apoptotic regulators in one anoxia tolerant model system, the freshwater turtle Trachemys scripta. Since Hsp72 is known to regulate apoptosis through interactions with Bcl-2, we manipulated the levels of Hsp72 and Bcl-2 with siRNA in neuronally enriched primary cell cultures and ex...
Source: Brain Research - August 5, 2014 Category: Neurology Authors: Kesaraju S, Nayak G, Prentice HM, Milton SL Tags: Brain Res Source Type: research

Equol is neuroprotective during focal cerebral ischemia and reperfusion that involves p-Src and gp91phox.
Abstract Both of gp91(phox) (an isoform of nicotinamide adenine dinucleotide phosphate reduced oxidases) and Src (a non-receptor protein tyrosine kinase) are abundantly expressed in the brain and play a prominent role in mediating ischemic alteration in neurons. The inhibitory strategy of them is believed to be the promising treatment of stroke. The present study was designed to investigate the effect of equol (0.625-2.5 mg•kg(-1), i.g. for 3 days), a predominant active metabolite of daidzein, on neuroprotection against cerebral ischemia/reperfusion injury in rats and the underlying mechanisms. We found that equ...
Source: Current Neurovascular Research - September 7, 2014 Category: Neurology Authors: Wei YU, Wang Y, Zhou DX, Zhao LM, Li GR, Deng XL Tags: Curr Neurovasc Res Source Type: research

17-beta estradiol inhibits oxidative stress-induced accumulation of AIF into nucleolus and PARP1-dependent cell death via estrogen receptor alpha.
Abstract Oxidative stress-induced DNA damage results in over-activation of poly(ADP-ribose) polymerase 1 (PARP1), leading to parthanatos, a newly discovered cell elimination pathway. Inhibition of PARP1-dependent cell death has shown to improve the outcome of diseases, including stroke, heart ischemia, and neurodegenerative diseases. In the present study we aimed to detect whether estrogen plays a protective role in inhibiting parthanatos. We utilized human mammary adenocarcinoma cells (MCF7) that abundantly express the estrogen receptor alpha and beta (ERα and ERβ). Parthanatos was induced by challenging the ce...
Source: Toxicology Letters - September 30, 2014 Category: Toxicology Authors: Batnasan E, Wang R, Wen J, Ke Y, Li X, Bohio AA, Zeng X, Huo H, Han L, Boldogh I, Ba X Tags: Toxicol Lett Source Type: research

Candesartan stimulates reparative angiogenesis in ischemic retinopathy model: role of hemeoxygenase-1 (HO-1)
Abstract Ischemic diseases such as stroke and proliferative retinopathy are characterized by hypoxia-driven release of angiogenic factors such as vascular endothelial growth factor (VEGF). However, revascularization of the ischemic areas is inadequate, resulting in impaired neuro-vascular function. We aim to examine the vascular protective effects of candesartan, an angiotensin receptor blocker, in an ischemic retinopathy mouse model. Vascular density, number of tip cells, and perfusions of capillaries were assessed. Activation of Muller glial cells and levels of peroxynitrite, VEGF, VEGFR2, inducible nitric o...
Source: Angiogenesis - November 25, 2014 Category: Molecular Biology Source Type: research

Critical role of extracellularly secreted neuronal pentraxin 1 in ischemic neuronal death
Conclusions: Collectively, our results demonstrate that extracellular release of NP1 promote hypoxic-ischemic neuronal death possible via surface clustering with GluR1 at synaptic sites and that NP1, not its family member NP2, is involved in the neuronal death mechanisms.
Source: BMC Neuroscience - December 20, 2014 Category: Neuroscience Authors: Shabarish ThatipamulaMir Hossain Source Type: research

MicroRNA-424 Protects Against Focal Cerebral Ischemia and Reperfusion Injury in Mice by Suppressing Oxidative Stress Basic Sciences
Conclusions— MiR-424 protects against transient cerebral ischemia/reperfusion injury by inhibiting oxidative stress.
Source: Stroke - January 26, 2015 Category: Neurology Authors: Liu, P., Zhao, H., Wang, R., Wang, P., Tao, Z., Gao, L., Yan, F., Liu, X., Yu, S., Ji, X., Luo, Y. Tags: Acute Cerebral Infarction Basic Sciences Source Type: research

Dioscin ameliorates cerebral ischemia/reperfusion injury through the downregulation of TLR4 signaling via HMGB-1 inhibition.
Abstract We previously reported the promising effect of dioscin against hepatic ischemia /reperfusion (I/R) injury, but its effect on cerebral I/R injury remains unknown. In this work, an in vitro oxygen-glucose deprivation and reoxygenation (OGD/R) model and an in vivo middle cerebral artery occlusion (MCAO) model were used. The results indicated that dioscin clearly protected PC12 cells and primary cortical neurons against OGD/R insult and significantly prevented cerebral I/R injury. Further research demonstrated that dioscin-induced neuroprotection was accompanied by a significant inhibition in the expression a...
Source: Free Radical Biology and Medicine - March 12, 2015 Category: Biology Authors: Tao X, Sun X, Yin L, Han X, Xu L, Qi Y, Xu Y, Li H, Lin Y, Liu K, Peng J Tags: Free Radic Biol Med Source Type: research

Silencing of Id2 attenuates hypoxia/ischemia-induced neuronal injury via inhibition of neuronal apoptosis.
This study was aimed to investigate whether knockdown of Id2 in neuronal cells could protect them from hypoxic and ischemic injury both in vitro and in vivo. Flow cytometric analysis was employed to assess neuronal apoptosis in CoCl2-treated neuroblastoma B35 cells engineered to overexpress or knockdown Id2 expression. In vivo knockdown of Id2 was performed in Sprague-Dawley rats by a single intracerebroventricular injection of Cy3-labeled and cholesterol-modified Id2-siRNA. We found that knockdown of Id2 attenuated H/I-induced neuronal apoptosis in vitro while overexpression of Id2 produced an opposite effect. In a rat mo...
Source: Behavioural Brain Research - July 14, 2015 Category: Neurology Authors: Guo L, Yang X, Lin X, Lin Y, Shen L, Nie Q, Ren L, Guo Q, Que S, Qiu Y Tags: Behav Brain Res Source Type: research

Micro‐RNA‐30a regulates ischemia‐induced cell death by targeting heat shock protein HSPA5 in primary cultured cortical neurons and mouse brain after stroke
Micro‐RNAs (miRs) have emerged as key gene regulators in many diseases, including stroke. We recently reported that miR‐30a protects N2A cells against ischemic injury, in part through enhancing beclin 1‐mediated autophagy. The present study explores further the involvement of miR‐30a in ischemia‐induced apoptosis and its possible mechanisms in primary cortical neurons and stroked mouse brain. We demonstrate that miR‐30a level is significantly decreased in cortical neurons after 1‐hr oxygen–glucose deprivation (OGD)/24‐hr reoxygenation. Overexpression of miR‐30a aggravated the OGD‐induced neuronal cell...
Source: Journal of Neuroscience Research - August 24, 2015 Category: Neuroscience Authors: Peng Wang, Nan Zhang, Jia Liang, Jiefei Li, Song Han, Junfa Li Tags: Research Article Source Type: research