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Total 97 results found since Jan 2013.

Inhibition of Tnf-α R1 signaling can rescue functional cortical plasticity impaired in early post-stroke period
Tumor necrosis factor-α (TNF-α) is one of the key players in stroke progression and can interfere with brain functioning. We previously documented an impairment of experience-dependent plasticity in the cortex neighboring the stroke-induced lesion, which was accompanied with an upregulation of Tnf-α level in the brain of ischemic mice 1 week after the stroke. Because TNF receptor 1 (TnfR1) signaling is believed to be a major mediator of the cytotoxicity of Tnf-α through activation of caspases, we used an anti-inflammatory intervention aimed at Tnf-α R1 pathway, in order to try to attenuate the detrimental effect of po...
Source: Neurobiology of Aging - June 17, 2015 Category: Neuroscience Authors: Monika Liguz-Lecznar, Renata Zakrzewska, Malgorzata Kossut Source Type: research

Up-regulation of VCAM1 Relates to Neuronal Apoptosis After Intracerebral Hemorrhage in Adult Rats.
Abstract Vascular cell adhesion molecule 1 (VCAM1) is a member of the Immunoglobulin superfamily and encodes a cell surface sialoglycoprotein expressed in cytokine-activated endothelium. This type I membrane protein mediates leukocyte-endothelial cell adhesion, facilitates the downstream signaling, and may play a role in the development of artherosclerosis and rheumatoid arthritis. Accumulating evidence has demonstrated that VCAM1 exerts an anti-apoptotic effect in several tumor tissues such as ovarian cancer and breast cancer. Intracerebral hemorrhage (ICH) is the second most common subtype of stroke with high mo...
Source: Neurochemical Research - April 14, 2015 Category: Neuroscience Authors: Zhang D, Yuan D, Shen J, Yan Y, Gong C, Gu J, Xue H, Qian Y, Zhang W, He X, Yao L, Ji Y, Shen A Tags: Neurochem Res Source Type: research

HAMI 3379, a CysLT2R antagonist, dose- and time-dependently attenuates brain injury and inhibits microglial inflammation after focal cerebral ischemia in rats
Publication date: 16 April 2015 Source:Neuroscience, Volume 291 Author(s): Q.J. Shi , H. Wang , Z.X. Liu , S.H. Fang , X.M. Song , Y.B. Lu , W.P. Zhang , X.Y. Sa , H.Z. Ying , E.Q. Wei Cysteinyl leukotrienes (CysLTs) induce inflammatory responses by activating their receptors, CysLT1R and CysLT2R. We have reported that CysLT2R is involved in neuronal injury, astrocytosis, and microgliosis, and that intracerebroventricular (i.c.v.) injection of the selective CysLT2R antagonist HAMI 3379 protects against acute brain injury after focal cerebral ischemia in rats. In the present study, we clarified features of the protective ...
Source: Neuroscience - February 26, 2015 Category: Neuroscience Source Type: research

In-hospital outcomes of thrombolysis for acute ischemic stroke in patients with primary brain tumors
Publication date: March 2015 Source:Journal of Clinical Neuroscience, Volume 22, Issue 3 Author(s): Santosh B. Murthy , Yogesh Moradiya , Shreyansh Shah , Aditi Shastri , Eric M. Bershad , Jose I. Suarez Data on thrombolysis outcomes in patients with primary brain tumors are limited. Our aim was to study stroke outcomes following thrombolysis in these patients in a population-based study. Patients with acute ischemic stroke who received thrombolysis were identified from the 2002–2011 USA Nationwide Inpatient Sample. We compared demographics, comorbidities, and outcomes between primary brain tumor-associated strokes (BT...
Source: Journal of Clinical Neuroscience - February 16, 2015 Category: Neuroscience Source Type: research

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

Peroxisome Proliferator-activated Receptor-γ Agonist Pioglitazone Ameliorates White Matter Lesion and Cognitive Impairment in Hypertensive Rats.
CONCLUSIONS: Long-term treatment of pioglitazone has beneficial effect on hypertension-induced WML and cognition decline, which may partly through its effect on attenuation of arteriolar remodeling, endothelial activation, and brain inflammation. PMID: 25611692 [PubMed - as supplied by publisher]
Source: CNS Neuroscience and Therapeutics - January 22, 2015 Category: Neuroscience Authors: Lan LF, Zheng L, Yang X, Ji XT, Fan YH, Zeng JS Tags: CNS Neurosci Ther Source Type: research

Isoflurane Protects Against Injury Caused by Deprivation of Oxygen and Glucose in Microglia Through Regulation of the Toll-Like Receptor 4 Pathway
In this study, we investigated the effects of isoflurane on OGD-induced injury in microglia. 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay and lactate dehydrogenase (LDH) revealed that OGD did indeed induce cell death in microglia. However, isoflurane preconditioning attenuated OGD-induced cell death. Terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) assay demonstrated that isoflurane treatment alleviated OGD-induced apoptosis. Toll-like receptor 4 (TLR4) plays a considerable role in the induction of innate immune and inflammatory responses. Our results indicate that isoflurane...
Source: Journal of Molecular Neuroscience - December 1, 2014 Category: Neuroscience Source Type: research

Regional quantification of cerebral venous oxygenation from MRI susceptibility during hypercapnia
Publication date: 1 January 2015 Source:NeuroImage, Volume 104 Author(s): Audrey P. Fan , Karleyton C. Evans , Jeffrey N. Stout , Bruce R. Rosen , Elfar Adalsteinsson There is an unmet medical need for noninvasive imaging of regional brain oxygenation to manage stroke, tumor, and neurodegenerative diseases. Oxygenation imaging from magnetic susceptibility in MRI is a promising new technique to measure local venous oxygen extraction fraction (OEF) along the cerebral venous vasculature. However, this approach has not been tested in vivo at different levels of oxygenation. The primary goal of this study was to test whether ...
Source: NeuroImage - November 4, 2014 Category: Neuroscience Source Type: research

Genetic deletion of calcium/calmodulin-dependent protein kinase kinase ß (CaMKK ß) or CaMK IV exacerbates stroke outcomes in ovariectomized (OVXed) female mice
Conclusions: Inhibition of CaMKK signaling exacerbated stroke outcome and increased BBB impairment, transcriptional inactivation and inflammatory responses in females after stroke. Therefore, CaMKK signaling may be a potential target for stroke treatment in both males and females.
Source: BMC Neuroscience - October 21, 2014 Category: Neuroscience Authors: Lin LiuLouise McCulloughJun Li Source Type: research

Periodic Lateralized Epileptiform Discharges (PLEDs) in Patients With Neurosyphilis and HIV Infection.
Abstract Periodic lateralized epileptiform discharges (PLEDs) are an electroencephalographic pattern recorded in the setting of a variety of brain abnormalities. It is best recognized for its association with acute viral encephalitis, stroke, tumor, or latestatus epilepticus. However, there are other conditions that have been recognized as the underlying pathology for PLEDs such as alcohol withdrawal, Creutzfeldt-Jacob disease, anoxic brain injury, and hemiplegic migraine. However, there are only rare case reports of PLEDs in patients with neurosyphilis. Here, we report 2 patients presenting with encephalopathy an...
Source: Clinical EEG and Neuroscience - October 17, 2014 Category: Neuroscience Authors: Takagaki K, Morales MK, Vitantonio D, Berkowitz F, Bell WL, Kumar PN, Motamedi GK Tags: Clin EEG Neurosci Source Type: research

Small-animal PET demonstrates brain metabolic change after using bevacizumab in a rat model of cerebral ischemic injury
Abstract To evaluate the effect of bevacizumab on cerebral ischemia, we used 2-deoxy-2-18F-fluoro-D-glucose (18F-FDG) small-animal positron emission tomography (PET) in the middle cerebral artery occlusion (MCAO) rat model. After baseline neurologic function tests and PET studies, MCAO Sprague-Dawley rats received bevacizumab or normal saline (controls). Weekly PET imaging and neurologic function tests showed that the 18F-FDG accumulation in the bevacizumab group was similar to that in the controls during the first 2 weeks, but lower than in controls at weeks 3 and 4. However, no difference was found in neurologi...
Source: Neuroscience Bulletin - October 1, 2014 Category: Neuroscience Source Type: research

Apigenin Mediated Protection of OGD-Evoked Neuron-Like Injury in Differentiated PC12 Cells.
Abstract Ischemic stroke has been confirmed to cause neuronal injury due to its insufficient supply of glucose and oxygen to brain tissue. Previous research has shown that oxidative stress, a result of excessive accumulation of reactive oxygen species (ROS), relates to pathophysiology of ischemic stroke, and causes oxidative damage to biomolecules, eventually leading to programmed cell death. Meanwhile, apigenin has been shown to exhibit antioxidant, anti-inflammatory, anti-cancer properties and neuroprotective action. Hence, this study was to investigate the potential mechanisms underlying the neural protection o...
Source: Neurochemical Research - September 11, 2014 Category: Neuroscience Authors: Guo H, Kong S, Chen W, Dai Z, Lin T, Su J, Li S, Xie Q, Su Z, Xu Y, Lai X Tags: Neurochem Res Source Type: research

Pretreatment by Evodiamine is Neuroprotective in Cerebral Ischemia: Up-Regulated pAkt, pGSK3β, Down-Regulated NF-κB Expression, and Ameliorated BBB Permeability.
Abstract Inflammatory damage plays an important role in cerebral ischemic pathogenesis and may represent a target for treatment. Evodiamine (Evo) has been proved to elicit a variety of biological effects through its anti-inflammatory property in the treatment of infectious disease, Alzheimer's disease and hypoxia-induced inflammatory response. Whether this protective effect applies to cerebral ischemic injury, we therefore investigated the potential neuroprotective role of Evo and the underlying mechanisms. Male Institute of Cancer Research (ICR) mice were subjected to permanent middle cerebral artery occlusion (...
Source: Neurochemical Research - June 12, 2014 Category: Neuroscience Authors: Zhao T, Zhang X, Zhao Y, Zhang L, Bai X, Zhang J, Zhao X, Chen L, Wang L, Cui L Tags: Neurochem Res Source Type: research

Quantitative Longitudinal Evaluation of Diaschisis-Related Cerebellar Perfusion and Diffusion Parameters in Patients with Supratentorial Hemispheric High-Grade Gliomas After Surgery.
In this study, we investigated the longitudinal evolution of diaschisis-related cerebellar perfusion and diffusion tensor-imaging (DTI) changes in patients after surgery for supratentorial brain tumors. Eight patients (M:F 5:3, age 8-22 years) who received surgery for supratentorial high-grade gliomas were evaluated. Initial MRI studies were performed 19-54 days postoperatively, with follow-ups at 2- to 3-month intervals. For each study, parametric maps of the cerebellum were generated and coregistered to T1-weighted images that had been previously segmented for cGM and cWM. Aggregate mean values of CBV, cerebral blood f...
Source: Cerebellum - June 12, 2014 Category: Neuroscience Authors: Patay Z, Parra C, Hawk H, George A, Li Y, Scoggins M, Broniscer A, Ogg RJ Tags: Cerebellum 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