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Source: Molecular Neurobiology
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Total 171 results found since Jan 2013.

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

A Novel Functional Polymorphism in the NINJ2 Promoter Predicts Risk of Large Artery Atherosclerotic Stroke
Abstract A recent genome-wide association study (GWAS) identified two common polymorphisms (rs12425791 and rs11833579) on chromosome 12p13 that confer risk to stroke, particularly for large artery atherosclerotic (LAA) stroke. However, these two polymorphisms are located ∼11 kb upstream of the NINJ2 gene and their effects on NINJ2 expression have not been well characterized. Through linkage disequilibrium and fine-mapping analysis, we identified a novel functional polymorphism in the NINJ2 promoter (rs3809263 G > A) and examined its association with risk of LAA stroke in Chinese population. Rs3809263 was...
Source: Molecular Neurobiology - December 19, 2015 Category: Neurology Source Type: research

GSK-3β inhibitor TWS119 attenuates rtPA-induced hemorrhagic transformation and activates Wnt/β-catenin signaling pathway after acute ischemic stroke in rats
This study provides a potential therapeutic strategy to prevent tPA-induced HT after acute ischemic stroke.
Source: Molecular Neurobiology - December 15, 2015 Category: Neurology Source Type: research

MicroRNA-9 Mediates the Cell Apoptosis by Targeting Bcl2l11 in Ischemic Stroke
In this study, we found that miR-9 is downregulated in the mice with middle cerebral artery occlusion (MCAO) brain and oxygen–glucose deprivation (OGD) neurons. Application of miR-9 gamer could restore the neurological scores and reduces the infarct volume, brain water content, and the behavioral impairments. Moreover, upregulation of miR-9 suppresses the neuronal apoptosis in MCAO brain and OGD neurons. Furthermore, we identified that Bcl2l11 as the direct target of miR-9 and manipulation of miR-9 induces the corresponding changing of Bcl2l11 protein level. Finally, we found that the protein level of Bcl2l11 is increase...
Source: Molecular Neurobiology - December 11, 2015 Category: Neurology Source Type: research

Reduced Serum Level of Interleukin-10 is Associated with Cerebral Infarction: A Case-Control and Meta-Analysis Study
This study enrolled a total of 169 CI patients admitted to the Second Hospital of Hebei Medical University between May 2011 and November 2014. During the same period, a group of 145 individuals were recruited at the same hospital as healthy controls after thorough physical examination. Serum IL-10 levels were measured by enzyme-linked immunosorbent assay (ELISA). SPSS 19.0 (IBM, 2010, Chicago, IL, USA) and Comprehensive Meta-Analysis 2.0 (CMA 2.0) software were used for data analysis. Serum levels of IL-10 (pg/mL) were significantly lower in CI patients when compared to healthy controls (15.36 ± 3.21 vs. 21.64 ± ...
Source: Molecular Neurobiology - August 7, 2015 Category: Neurology Source Type: research

Chronic Metformin Preconditioning Provides Neuroprotection via Suppression of NF-κB-Mediated Inflammatory Pathway in Rats with Permanent Cerebral Ischemia
In this study, we tested the hypothesis that chronic preconditioning with metformin conferred neuroprotection via suppression of nuclear factor kappa B (NF-κB)-mediated inflammatory pathway. Male Sprague–Dawley rats were treated with vehicle or metformin (50 mg/kg daily, i.p.) for 3 weeks and were subjected to permanent middle cerebral artery occlusion (pMCAO). At 24 h (acute phase) and 96 h (subacute phase) after pMCAO, infarct volume and neurological deficits were evaluated. Meanwhile, the activity of NF-κB and the levels of its downstream pro-inflammatory cytokines were detected at 24 h after pMCAO. Our results...
Source: Molecular Neurobiology - July 21, 2015 Category: Neurology Source Type: research

Osteopontin Mediates Hyperbaric Oxygen Preconditioning-Induced Neuroprotection Against Ischemic Stroke
Abstract Neurosurgical operations may result in surgical injury which would lead to postoperative neurological deficits. Hyperbaric oxygen preconditioning (HBO-PC) may be beneficial for such people. However, the exact mechanism underlying HBO-PC is not well known yet. The aim of this study is to explore the role of osteopontin (OPN) in HBO-PC-induced neuroprotection. The study consisted of two experiments. In experiment 1, Sprague Dawley (SD) rats were divided into four groups: sham group, HBO-PC sham group, stroke group, and HBO-PC group (HBO-PC + stroke). The animals in the second experiment were randomly a...
Source: Molecular Neurobiology - July 21, 2015 Category: Neurology Source Type: research

Chromosome 4q25 Variants rs2200733, rs10033464, and rs1906591 Contribute to Ischemic Stroke Risk
Abstract Previous studies have shown an association between chromosome 4q25 variants (rs2200733, rs10033464, and rs1906591) and the risk of ischemic stroke. However, the results are inconsistent. Thus, we conducted this meta-analysis to evaluate risk effect of chromosome 4q25 variants on ischemic stroke. We performed the literature search in PubMed and Embase through October 2014 for all the potentially relevant studies. The odds ratios (ORs), together with the corresponding 95 % confidence intervals (95 % CIs) were calculated to evaluate the strength of association. The search yielded eight studies (13 reports ...
Source: Molecular Neurobiology - July 11, 2015 Category: Neurology Source Type: research

PPAR-γ Ameliorates Neuronal Apoptosis and Ischemic Brain Injury via Suppressing NF-κB-Driven p22phox Transcription
Abstract Peroxisome proliferator-activated receptor-gamma (PPAR-γ), a stress-induced transcription factor, protects neurons against ischemic stroke insult by reducing oxidative stress. NADPH oxidase (NOX) activation, a major driving force in ROS generation in the setting of reoxygenation/reperfusion, constitutes an important pathogenetic mechanism of ischemic brain damage. In the present study, both transient in vitro oxygen-glucose deprivation and in vivo middle cerebral artery (MCA) occlusion-reperfusion experimental paradigms of ischemic neuronal death were used to investigate the interaction between PPAR-γ a...
Source: Molecular Neurobiology - June 24, 2015 Category: Neurology Source Type: research

Ginsenoside Rd Is Efficacious Against Acute Ischemic Stroke by Suppressing Microglial Proteasome-Mediated Inflammation
In this study, we conducted a pooled analysis of the data from 199 patients with acute ischemic stroke in the first trial and 390 in the second to reanalyze the efficacy and safety of Rd. Moreover, animal stroke models were carried out to explore the possible molecular mechanisms underlying Rd neuroprotection. The pooled analysis showed that compared with placebo group, Rd could improve patients’ disability as assessed by modified Rankin Scale (mRS) score on day 90 post-stroke and reduce neurologic deficits on day 15 or day 90 post-stroke as assessed by NIH Stroke Scale (NIHSS) and Barthel Index (BI) scores. For neuropro...
Source: Molecular Neurobiology - June 17, 2015 Category: Neurology Source Type: research

Perihematomal Cellular Injury Is Reduced by Trans-sodium Crocetinate in a Model of Intracerebral Hemorrhage
This study examined the impact of TSC on neuronal loss in an animal model of intracerebral hemorrhage (ICH). Utilizing a rat model of collagenase injection, TSC was shown to reduce perihematomal cellular loss after ICH, as assessed by Fluoro-Jade B staining in tissue sections. This is the first evidence demonstrating that TSC is capable of limiting hemorrhagic injury to neurons in the brain. The finding supports the concept that TSC may represent a candidate therapeutic for early intervention regardless of whether a stroke is hemorrhagic or ischemic in nature.
Source: Molecular Neurobiology - June 7, 2015 Category: Neurology Source Type: research

Roles of Neuroglobin Binding to Mitochondrial Complex III Subunit Cytochrome c 1 in Oxygen-Glucose Deprivation-Induced Neurotoxicity in Primary Neurons
In this study, we for the first time defined Ngb-Cyc1 binding, and investigated its roles in oxygen-glucose deprivation (OGD)/reoxygenation-induced neurotoxicity and ROS production in primary neurons. Immunocytochemistry and co-immunoprecipitation validated Ngb-Cyc1 binding, which was significantly increased by OGD and Ngb overexpression. We found 4 h OGD with/without 4 h reoxygenation significantly increased complex III activity, but this activity elevation was significantly attenuated in three groups of neurons: Ngb overexpression, specific complex III inhibitor stigmatellin, or stigmatellin plus Ngb overexpression, w...
Source: Molecular Neurobiology - June 7, 2015 Category: Neurology Source Type: research

Elevated Serum Levels of Neopterin at Admission Predicts Depression After Acute Ischemic Stroke: a 6-Month Follow-Up Study
Abstract Inflammation and cell-mediated immune activation are attributed to the pathogenesis and pathophysiology in depression. Our aim was to test the possible association between serum levels of neopterin and the development of post-stroke depression (PSD) in Chinese patients. The subjects were first-ever acute ischemic stroke patients who were hospitalized at the First Affiliated Hospital of Xinxiang Medical University during the period from December 2012 to December 2013. Clinical information and stroke severity were collected at admission. Neurological and neuropsychological evaluations were conducted at the ...
Source: Molecular Neurobiology - June 4, 2015 Category: Neurology Source Type: research

Efficient Docosahexaenoic Acid Uptake by the Brain from a Structured Phospholipid
Abstract Docosahexaenoic acid (DHA) is the main essential omega-3 fatty acid in brain tissues required for normal brain development and function. An alteration of brain DHA in neurodegenerative diseases such as Alzheimer’s and Parkinson’s is observed. Targeted intake of DHA to the brain could compensate for these deficiencies. Blood DHA is transported across the blood–brain barrier more efficiently when esterified at the sn-2 position of lyso-phosphatidylcholine. We used a structured phosphatidylcholine to mimic 2-docosahexaenoyl-lysoPC (lysoPC-DHA), named AceDoPC (1-acetyl,2-docosahexaenoyl-glycerophosphoch...
Source: Molecular Neurobiology - June 4, 2015 Category: Neurology Source Type: research

Nicotine Inhibits Microglial Proliferation and Is Neuroprotective in Global Ischemia Rats
Abstract Ischemic injury in rodent models reliably leads to the activation of microglia, which might play a detrimental role in neuronal survival. Our preliminary studies suggest that nicotine plays a potential role in decreasing the numbers of cultured microglia in vitro. In the present study, we found treatment with nicotine 2, 6, and 12 h after ischemia for 7 days significantly increased the survival of CA1 pyramidal neurons in ischemia/reperfusion rats. This effect was accompanied by a significant reduction in the increase of microglia rather than astrocytes, as well as a significant reduction of enhanced e...
Source: Molecular Neurobiology - May 15, 2015 Category: Neurology Source Type: research