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Condition: Stroke

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Total 302 results found since Jan 2013.

DDR1 may play a key role in destruction of the blood–brain barrier after cerebral ischemia–reperfusion
Publication date: Available online 25 January 2015 Source:Neuroscience Research Author(s): Mingxia Zhu , Dong Xing , Zhihong Lu , Yanhong Fan , Wugang Hou , Hailong Dong , Lize Xiong , Hui Dong Discoidin domain receptor 1 (DDR1) has been shown to mediate matrix metalloproteinase-9 (MMP-9) secretions and degrade all extracellular matrix compounds in mammalian tumor cells. We hypothesized that DDR1 expression will be elevated and the blood–brain barrier (BBB) will be damaged after focal cerebral ischemia in rats. Inhibiting DDR1 expression can alleviate BBB disruption and cerebral ischemic damage via down-regulation of M...
Source: Neuroscience Research - January 30, 2015 Category: Neuroscience Source Type: research

Neuroprotective Role of an N-acetyl Serotonin Derivative via Activation of Tropomyosin-related Kinase Receptor B after Subarachnoid Hemorrhage in a Rat Model.
This study is to investigate a potential role of HIOC on ameliorating early brain injury after experimental subarachnoid hemorrhage (SAH). One hundred and fifty-six adult male Sprague-Dawley rats were used. SAH model was induced by endovascular perforation. TrkB small interfering RNA (siRNA) or scramble siRNA was injected intracerebroventricularly 24hours before SAH. HIOC was administrated intracerebroventricularly 3hours after SAH and compared with brain-derived neurotrophic factor (BDNF). SAH grade and neurologic scores were evaluated for the outcome study. For the mechanism study, the expression of TrkB, phosphorylated ...
Source: Neurobiology of Disease - April 8, 2015 Category: Neurology Authors: Tang J, Hu Q, Chen Y, Liu F, Zheng Y, Tang J, Zhang J, Zhang JH Tags: Neurobiol Dis Source Type: research

TGF- β1/Smad3 Signaling Pathway Suppresses Cell Apoptosis in Cerebral Ischemic Stroke Rats.
CONCLUSIONS The TGF-β1/Smad3 signaling pathway was up-regulated once cerebral ischemic stroke was simulated. TGF-β1 may activate the expression of Bcl-2 via Smad3 to suppress the apoptosis of neurons. PMID: 28110342 [PubMed - in process]
Source: Medical Science Monitor - January 25, 2017 Category: Research Tags: Med Sci Monit Source Type: research

The 15-LO-1/15-HETE system promotes angiogenesis by upregulating VEGF in ischemic brains.
DISCUSSION: The results indicate that the 15-LO-1/15-HETE system promotes angiogenesis in ischemic brains by upregulation of VEGF, representing a potential target for improving neurobehavioral recovery after cerebral ischemic stroke. PMID: 28460604 [PubMed - as supplied by publisher]
Source: Neurological Research - May 5, 2017 Category: Neurology Tags: Neurol Res Source Type: research

Exendin-4 attenuates neuronal death via GLP-1R/PI3K/Akt pathway in early brain injury after subarachnoid hemorrhage in rats.
In conclusion, the neuroprotective effect of Ex-4 in EBI after SAH was mediated by attenuation of neuronal apoptosis via GLP-1R/PI3K/Akt signaling pathway, therefore EX-4 should be further investigated as a potential therapeutic agent in stroke patients. PMID: 28986282 [PubMed - as supplied by publisher]
Source: Neuropharmacology - October 3, 2017 Category: Drugs & Pharmacology Authors: Xie Z, Enkhjargal B, Wu L, Zhou K, Sun C, Hu X, Gospodarev V, Tang J, You C, Zhang JH Tags: Neuropharmacology Source Type: research

Adiponectin attenuates neuronal apoptosis induced by hypoxia-ischemia via the activation of AdipoR1/APPL1/LKB1/AMPK pathway in neonatal rats.
Abstract Adiponectin is an important adipocyte-derived plasma protein that has beneficial effects on cardio- and cerebrovascular diseases. A low level of plasma Adiponectin is associated with increased mortality post ischemic stroke; however, little is known about the causal role of Adiponectin as well as its molecular mechanisms in neonatal hypoxia ischemia (HI). In the present study, ten-day-old rat pups were subjected to right common carotid artery ligation followed by 2.5 h hypoxia. Recombinant human Adiponectin (rh-Adiponectin) was administered intranasally 1 h post HI. Adiponectin Receptor 1 (AdipoR1) si...
Source: Neuropharmacology - February 24, 2018 Category: Drugs & Pharmacology Authors: Xu N, Zhang Y, Doycheva DM, Ding Y, Zhang Y, Tang J, Guo H, Zhang JH Tags: Neuropharmacology Source Type: research

Non-Invasive Multimodality Imaging Directly Shows TRPM4 Inhibition Ameliorates Stroke Reperfusion Injury
In this study, we used multimodal imaging to assess edema formation and quantify the amount of metabolically functional brain salvaged after a rat model of stroke reperfusion. TRPM4 upregulation in endothelium emerges as early as 2  h post-stroke induction. Expression of TRPM4 channel was suppressed directly in vivo by treatment with siRNA; scrambled siRNA was used as a control. T2-weighted MRI suggests that TRPM4 inhibition successfully reduces edema by 30% and concomitantly salvages functionally active brain, measured by18F-FDG-PET. These in vivo imaging results correlate well with post-mortem 2,3,5-triphenyltetrazolium...
Source: Translational Stroke Research - March 22, 2018 Category: Neurology Source Type: research

VEGF antagonism attenuates cerebral ischemia/reperfusion-induced injury via inhibiting endoplasmic reticulum stress-mediated apoptosis.
Abstract Endoplasmic reticulum (ER) stress-mediated apoptosis pathway is considered to play a vital role in mediating stroke and other cerebrovascular diseases. Previous studies have showed that vascular endothelial growth factor (VEGF) antagonism reduced cerebral ischemic/reperfusion (CI/R) damage, but whether attenuation of ER stress-induced apoptosis is contributing to its mechanisms remains elusive. Our study aimed to investigate the protective effect of VEGF antagonism on CI/R-induced injury. First, oxygen-glucose deprivation and re-oxygenation (OGD/R) BEND3 cell model was constructed to estimate siRNA-VEGF o...
Source: Biological and Pharmaceutical Bulletin - March 1, 2019 Category: Drugs & Pharmacology Authors: Feng SQ, Zong SY, Liu JX, Chen Y, Xu R, Yin X, Zhao R, Li Y, Luo TT Tags: Biol Pharm Bull Source Type: research

Intranasal wnt-3a alleviates neuronal apoptosis in early brain injury post subarachnoid hemorrhage via the regulation of wnt target PPAN mediated by the moonlighting role of aldolase C
Publication date: Available online 31 December 2019Source: Neurochemistry InternationalAuthor(s): Wu Ruan, Junwen Hu, Hang Zhou, Yin Li, Chaoran Xu, Yujie Luo, Ting Chen, Bangliang Xu, Feng Yan, Gao ChenAbstractNeuronal apoptosis is one of the main pathophysiological events in the early brain injury (EBI) post subarachnoid hemorrhage (SAH). Wnt-3a, one of the endogenous wnt ligands crucial in neurogenesis, has been proven to be efficacious in neuroprotection in traumatic brain injury and ischemic stroke. The glycolytic enzyme aldolase C and ribosome biogenesis protein PPAN were revealed to be linked to wnt signaling pathwa...
Source: Neurochemistry International - January 1, 2020 Category: Neuroscience Source Type: research

Electroacupuncture Pretreatment Prevents Ischemic Stroke and Inhibits Wnt Signaling-Mediated Autophagy Through the Regulation of GSK-3 β Phosphorylation.
In this study, rats were treated with EA prior to focal ischemia by middle cerebral artery occlusion (MCAO). Deficit score, infarct volumes and levels of autophagy markers, such as LC3I, LC3II and p62, were assessed with either PI3K inhibitor wortmannin or a GSK-3β inhibitor LiCl. Oxygen-glucose deprivation/re-oxygenation (OGD/R) was made in the primitive neuron in vitro, and was respectively treated with autophagy inhibitors 3-MA, LiCl, GSK3β siRNA, or mTOR inhibitor rapamycin. The results indicated that EA pretreatment increased the levels of autophagy marker LC3-II and reduced the levels of p62. Meanwhile, deficit out...
Source: Brain Research Bulletin - March 2, 2020 Category: Neurology Authors: Chen C, Yu Q, Xu K, Cai L, Felicia BM, Wang L, Zhang A, Dai Q, Geng W, Wang J, Mo Y Tags: Brain Res Bull Source Type: research

Occludin degradation makes brain microvascular endothelial cells more vulnerable to reperfusion injury in vitro
AbstractIntracerebral hemorrhage is the most dangerous complication in tPA thrombolytic therapy for ischemic stroke, which occurs as a consequence of endothelial cell death at the blood brain barrier (BBB) during thrombolytic reperfusion. We have previously shown that cerebral ischemia induced rapid occludin degradation and BBB disruption. Here we demonstrated an important role of occludin degradation in facilitating the evolution of ischemic endothelial cells towards death. Cultured brain microvascular endothelial cells (bEnd.3 cells) were exposed to oxygen ‐glucose deprivation (OGD) or incubated with occludin siRNA or ...
Source: Journal of Neurochemistry - June 11, 2020 Category: Neuroscience Authors: Yuan Zhang, Xiaofeng Li, Shanshan Qiao, Dexin Yang, Zongyang Li, Ji Xu, Weiping Li, Li Su, Wenlan Liu Tags: ORIGINAL ARTICLE Source Type: research

Poldip2 mediates blood-brain barrier disruption and cerebral edema by inducing AQP4 polarity loss in mouse bacterial meningitis model.
CONCLUSION: Poldip2 inhibition alleviated brain edema and preserved the integrity of BBB partially by relieving the loss of AQP4 polarity via MMPs/β-DG pathway. PMID: 32790044 [PubMed - as supplied by publisher]
Source: CNS Neuroscience and Therapeutics - August 11, 2020 Category: Neuroscience Authors: Gao M, Lu W, Shu Y, Yang Z, Sun S, Xu J, Gan S, Zhu S, Qiu G, Zhuo F, Xu S, Wang Y, Chen J, Wu X, Huang J Tags: CNS Neurosci Ther Source Type: research

Clinacanthus nutans Mitigates Neuronal Death and Reduces Ischemic Brain Injury: Role of NF- κB-driven IL-1β Transcription
AbstractNeuroinflammation has been shown to exacerbate ischemic brain injury, and is considered as a prime target for the development of stroke therapies.Clinacanthus nutans Lindau (C. nutans) is widely used in traditional medicine for treating insect bites, viral infection and cancer, due largely to its anti-oxidative and anti-inflammatory properties. Recently, we reported that an ethanol extract from the leaf ofC. nutans could protect the brain against ischemia-triggered neuronal death and infarction. In order to further understand the molecular mechanism(s) for its beneficial effects, two experimental paradigms, namely,...
Source: NeuroMolecular Medicine - October 5, 2020 Category: Neurology Source Type: research

Protective Effects of ShcA Protein Silencing for Photothrombotic Cerebral Infarction
This study suggests that the regulation of ShcA protein expression can be a therapeutic target for reducing brain damage with mitochondrial dysfunction caused by thrombotic infarction.
Source: Translational Stroke Research - September 6, 2021 Category: Neurology Source Type: research

PAF Receptor Inhibition Attenuates Neuronal Pyroptosis in Cerebral Ischemia/Reperfusion Injury
AbstractIschemic stroke is an inflammation-related disease, during which process activation of NLRP3 inflammasome and subsequent pyroptosis play crucial roles. Platelet-activating factor (PAF) is a potent phospholipid regulator of inflammation which exerts its effect via binding specific PAF receptor (PAFR). However, whether PAFR contributes to pyroptosis during ischemia/reperfusion (I/R) injury remains to be elucidated. To explore the underlying effect of PAFR on ischemic stroke from the perspective of pyroptosis, mice were subjected to middle cerebral artery occlusion/reperfusion (MCAO/R) injury and primary cultures of m...
Source: Molecular Neurobiology - September 25, 2021 Category: Neurology Source Type: research