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Cerebral stroke

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https://www.readbyqxmd.com/read/29045497/ceftriaxone-and-n-acetylcysteine-induced-brain-tolerance-to-ischemia-influence-on-glutamate-levels-in-focal-cerebral-ischemia
#1
Weronika Krzyżanowska, Bartosz Pomierny, Beata Bystrowska, Lucyna Pomierny-Chamioło, Małgorzata Filip, Bogusława Budziszewska, Joanna Pera
One of the major players in the pathophysiology of cerebral ischemia is disrupted homeostasis of glutamatergic neurotransmission, resulting in elevated extracellular glutamate (Glu) concentrations and excitotoxicity-related cell death. In the brain, Glu concentrations are regulated by Glu transporters, including Glu transporter-1 (GLT-1) and cystine/Glu antiporter (system xc-). Modulation of these transporters by administration of ceftriaxone (CEF, 200 mg/kg, i.p.) or N-acetylcysteine (NAC, 150 mg/kg, i.p.) for 5 days before focal cerebral ischemia may induce brain tolerance to ischemia by significantly limiting stroke-related damage and normalizing Glu concentrations...
2017: PloS One
https://www.readbyqxmd.com/read/29044603/comorbid-masticatory-impairment-delays-recovery-from-acute-cerebral-ischemia-and-locomotor-hypoactivity-after-subarachnoid-hemorrhage-in-mice
#2
Ikuho Kojima, Tatsushi Mutoh, Kazumasu Sasaki, Yasuko Tatewaki, Yasuyuki Taki, Tatsuya Ishikawa
Tooth loss and related changes in the functionality may lead to worse outcome of stroke patients, but the link involved in this pathway remains unclear. This study aimed to determine the effect of comorbid masticatory impairment on acute cerebral ischemia and neurobehavioral outcome after experimental subarachnoid hemorrhage (SAH). Thirty C57BL/6 mice with (molar-less) or without (control) prior treatment of cutting off the upper molars (separated by at least one week), were subjected to SAH by endovascular perforation...
October 17, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29044023/-may-thurner-syndrome-with-ischemic-cerebrovascular-accident-and-permeable-oval-foramen
#3
José A Arroyo, Sebastián Villate, Gustavo A Ortiz
The association of cerebral ischemic attack with patent foramen ovale has not been extensively studied, and frequently the site of origin of embolism is not detected despite routine studies. We present the case of a young patient with ischemic stroke and permeable oval foramen in the context of May Thurner syndrome. The May Thurner syndrome is an entity scarcely studied in the medical literature and it has also been infrequently related to ischemic vascular cerebral accident, but in patients with permeable oval foramen without evidence of the emboligen source, it is interesting to rule it out as a cause of paradoxical embolism...
2017: Medicina
https://www.readbyqxmd.com/read/29043564/the-ucp2-866g-a-polymorphism-could-be-considered-as-a-genetic-marker-of-different-functional-prognosis-in-ischemic-stroke-after-recanalization
#4
I Díaz-Maroto Cicuéndez, E Fernández-Díaz, J García-García, J Jordán, I Fernández-Cadenas, J Montaner, G Serrano-Heras, T Segura
Recent studies based on experimental animal models of stroke have suggested that uncoupling protein 2 (UCP2), an inner mitochondrial membrane protein that is thought to regulate energy metabolism and reduce reactive oxygen species generation, provides protection against reperfusion damage. We aimed to investigate whether -866G/A polymorphism in the promoter of the UCP2 gene, which enhances its transcriptional activity, is associated with functional prognosis in patients with embolic ischemic stroke after early recanalization...
October 17, 2017: Neuromolecular Medicine
https://www.readbyqxmd.com/read/29042040/optimal-blood-pressure-during-cardiopulmonary-bypass-defined-by-cerebral-autoregulation-monitoring
#5
Daijiro Hori, Yohei Nomura, Masahiro Ono, Brijen Joshi, Kaushik Mandal, Duke Cameron, Masha Kocherginsky, Charles W Hogue
OBJECTIVES: We sought to define the lower and upper limits of cerebral blood flow autoregulation and the optimal blood pressure during cardiopulmonary bypass. We further sought to identify variables predictive of these autoregulation end points. METHODS: Cerebral autoregulation was monitored continuously with transcranial Doppler in 614 patients during cardiopulmonary bypass enrolled in 3 investigations. A moving Pearson's correlation coefficient was calculated between cerebral blood flow velocity and mean arterial pressure to generate the variable mean velocity index...
November 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29041955/pluripotent-nontumorigenic-multilineage-differentiating-stress-enduring-cells-muse-cells-a-seven-year-retrospective
#6
REVIEW
Samantha C Fisch, María L Gimeno, Julia D Phan, Ariel A Simerman, Daniel A Dumesic, Marcelo J Perone, Gregorio D Chazenbalk
Multilineage differentiating stress enduring (Muse) cells, discovered in the spring of 2010 at Tohoku University in Sendai, Japan, were quickly recognized by scientists as a possible source of pluripotent cells naturally present within mesenchymal tissues. Muse cells normally exist in a quiescent state, singularly activated by severe cellular stress in vitro and in vivo. Muse cells have the capacity for self-renewal while maintaining pluripotent cell characteristics indicated by the expression of pluripotent stem cell markers...
October 18, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29040971/characteristics-and-outcomes-of-vertebrobasilar-artery-dissection-with-accompanied-atherosclerosis
#7
Chun Chien, Feng-Chi Chang, Hui-Chi Huang, Jui-Yao Tsai, Chih-Ping Chung
BACKGROUND: With the popularity of MRI use, vertebrobasilar artery dissection (VBD) has been found more frequently in patients with posterior circulation ischemic stroke (PCS). The relationship between VBD and atherosclerosis is unknown. The present study aimed to prove the hypothesis that PCS with pure VBD (p-VBD) and with VBD and accompanied cervical or cerebral artery atherosclerosis (a-VBD) have distinct manifestations. METHODS: Patients with VBD-related PCS who were prospectively enrolled in the Taipei Veterans General Hospital Stroke Registry between January 1, 2010 and August 31, 2014 were recruited for the present study...
October 17, 2017: Cerebrovascular Diseases Extra
https://www.readbyqxmd.com/read/29040874/surface-functionalized-exosomes-as-targeted-drug-delivery-vehicles-for-cerebral-ischemia-therapy
#8
Tian Tian, Hui-Xin Zhang, Chun-Peng He, Song Fan, Yan-Liang Zhu, Cui Qi, Ning-Ping Huang, Zhong-Dang Xiao, Zu-Hong Lu, Bakhos A Tannous, Jun Gao
The safe and effective delivery of drugs is a major obstacle in the treatment of ischemic stroke. Exosomes hold great promise as an endogenous drug delivery nanosystem for the treatment of cerebral ischemia given their unique properties, including low immunogenicity, innate stability, high delivery efficiency, and ability to cross the blood-brain barrier (BBB). However, exosome insufficient targeting capability limits their clinical applications. In this study, the c(RGDyK) peptide has been conjugated to the exosome surface by an easy, rapid, and bio-orthogonal chemistry...
October 4, 2017: Biomaterials
https://www.readbyqxmd.com/read/29040166/measurement-of-retinal-vessels-as-a-biomarker-of-cerebrovascular-ageing-in-older-hiv-positive-men-compared-to-controls
#9
Lewis Haddow, Rosanna Laverick, Irene Leung, Frank Post, Jaime Vera, Richard Gilson, Ian Williams, Marta Boffito, Caroline Sabin, Alan Winston, Tunde Peto
BACKGROUND: To compare retinal vascular measurements, biomarkers of cerebral small vessel disease (SVD), in HIV positive men aged 50 years and above with similarly-aged HIV negative men and younger HIV positive men. METHODS: We recruited white, non-diabetic men to a cross-sectional substudy of a larger cohort including three demographically-matched groups. Optic disc centred 45° colour fundus photographs were used to calculate central retinal arterial and venous calibre and the arterial-venous ratio (AVR)...
October 14, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/29039513/birc5-is-a-novel-target-of-peroxisome-proliferator%C3%A2-activated-receptor-%C3%AE-in-brain-microvascular-endothelium-cells-during-cerebral-ischemia
#10
Mingjing Xu, Xianli Yang, Qing Zeng, He He, Pengcheng Lu, Guozhi Huang
Cerebral ischemia is a leading cause of ischemic stroke, which may lead to severe disability and mortality worldwide. There are some key factors concerned in cardioprotection, such as peroxisome proliferator‑activated receptor γ (PPARγ), a ligand binding transcription factor involved in various biological functions including atherosclerosis, vascular dysfunction and hypertension, and baculoviral IAP repeat‑containing 5 (BIRC5), which may protect human brain endothelial cells from ischemia‑induced apoptosis...
October 10, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29039453/microrna-125a-3p-is-involved-in-early-behavioral-disorders-in-stroke-afflicted-rats-through-the-regulation-of-cadm2
#11
Yuqing Liu, Yunjun Li, Zhenxing Ren, Wenwen Si, Yiwei Li, Gang Wei, Wenguang Zhao, Jianhong Zhou, Yage Tian, Dongfeng Chen
Ischemic strokes carry a significant risk of mortality and recurrent vascular events. Recent studies suggest that changes in microRNAs (miRNAs or miRs) may affect the development of the stroke. However, few studies have investigated the role of miRNAs in behavioral disorder in early stroke. In the present study, animal models of middle cerebral artery occlusion (MCAO) are used, as well as a cell model of neurite outgrowth to further investigate the role of miRNAs in targeting synapse-associated proteins expression in early stroke...
October 10, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29039449/crosstalk-between-tlr2-and-sphk1-in-microglia-in-the-cerebral-ischemia-reperfusion-induced-inflammatory-response
#12
Wei Sun, Zhaoming Ding, Shengjie Xu, Zhiqiang Su, Hulun Li
Stroke is associated with high morbidity and mortality, and much remains unknown about the injury-related mechanisms that occur following reperfusion. This study aimed to explore the roles of Toll-like receptor 2 (TLR2) and sphingosine kinase 1 (Sphk1) in microglial cells in inflammatory responses induced by cerebral ischemia/reperfusion (I/R). For this purpose, C57BL/6 mice were randomly divided into 4 groups as follows: the sham-operated group, the I/R group, the I/R group treated with TLR2 antibody, and the I/R group treated with N,N-dimethylsphingosine...
September 29, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29038080/a-stent-retrieving-into-an-aspiration-catheter-with-proximal-balloon-asap-technique-a-technique-of-mechanical-thrombectomy
#13
Shunsaku Goto, Tomotaka Ohshima, Kojiro Ishikawa, Taiki Yamamoto, Shinji Shimato, Toshihisa Nishizawa, Kyozo Kato
PURPOSE: The best technique for the first attempt at mechanical thrombectomy for acute ischemic stroke is a still matter of debate. In this study, we evaluated the efficacy of a stent-retrieving into an aspiration catheter with proximal balloon (ASAP) technique that employs a series of thrombus extraction by withdrawing the stent retriever into the aspiration catheter, and continuous aspiration from the aspiration catheter in the first attempt. METHODS: We performed a retrospective analysis of 42 consecutive patients with acute ischemic stroke caused by occlusions in the anterior circulation, who were treated with the ASAP technique at our institution...
October 13, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29037241/the-potassium-channel-kca3-1-constitutes-a-pharmacological-target-for-astrogliosis-associated-with-ischemia-stroke
#14
Mengni Yi, Tianjiao Wei, Yanxia Wang, Qin Lu, Gaoxian Chen, Xiaoling Gao, Herbert M Geller, Hongzhuan Chen, Zhihua Yu
BACKGROUND: Reactive astrogliosis is one of the significantly pathological features in ischemic stroke accompanied with changes in gene expression, morphology, and proliferation. KCa3.1 was involved in TGF-β-induced astrogliosis in vitro and also contributed to astrogliosis-mediated neuroinflammation in neurodegeneration disease. METHODS: Wild type mice and KCa3.1(-/-) mice were subjected to permanent middle cerebral artery occlusion (pMCAO) to evaluate the infarct areas by 2,3,5-triphenyltetrazolium hydrochloride staining and neurological deficit...
October 16, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29036822/cortical-cerebral-microinfarcts-on-3-tesla-mri-in-patients-with-vascular-cognitive-impairment
#15
Doeschka A Ferro, Susanne J van Veluw, Huiberdina L Koek, Lieza G Exalto, Geert Jan Biessels
BACKGROUND: Cerebral microinfarcts (CMIs) are small ischemic lesions that are a common neuropathological finding in patients with stroke or dementia. CMIs in the cortex can now be detected in vivo on 3 Tesla MRI. OBJECTIVE: To determine the occurrence of CMIs and associated clinical features in patients with possible vascular cognitive impairment (VCI). METHOD: 182 memory-clinic patients (mean age 71.4±10.6, 55% male) with vascular injury on brain MRI (i...
October 12, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29036623/predictors-of-mortality-in-high-risk-patients-with-qt-prolongation-in-a-community-hospital
#16
Charlotte Gibbs, Jacob Thalamus, Kristian Heldal, Øystein Lunde Holla, Kristina H Haugaa, Jan Hysing
Aims: To determine predictors of mortality in patients with corrected QT interval (QTc) ≥ 500 ms in a community hospital. Methods and results: In this retrospective observational study, we searched the electrocardiogram (ECG) database at Telemark Hospital Trust, Norway, from January 2004 to December 2014. Medication, electrolyte abnormalities, and medical conditions known to prolong the QT interval were recorded. From the medical records, we assessed whether the prolonged QTc was noted by the health care providers...
October 3, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29035834/synergistic-effect-of-mild-hypothermia-and-the-notch-inhibitor-dapt-against-post-stroke-seizures
#17
Guo-Shuai Yang, Xiao-Yan Zhou, Xue-Fang An, Xuan-Jun Liu, Yan-Jun Zhang, Dan Yu
Seizure is a serious complication of stroke, indicating poor prognosis. Notch signaling is associated with neuronal activity. Inhibition of Notch signaling suppresses seizure activity induced by kainic acid. The present study investigated the effect of the Notch inhibitor, DAPT, alone or in combination with mild hypothermia, on post-stroke seizures. A global cerebral ischemia (GCI) model was performed in Sprague Dawley (SD) male rats. Seizure activity was evaluated by the frequency of seizure attacks, seizure severity scores, and seizure discharges...
October 13, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29034755/the-alliance-with-expanding-blood-volume-and-correcting-anemia-is-an-effective-therapeutic-measure-for-the-adult-anemia-patients-of-acute-cerebral-infarction
#18
Zunyu Ke, Yu Zhao, Chuanling Wang, Zhiyou Cai
Anemia is closely associated with the occurrence and development of ischemic stroke. However, the clinical association between anemia and ischemic stroke remains unclear. We evaluated the clinical features of adult patients of acute cerebral infarction with anemia, and to provide a reference in the treatment of the anemia patients of acute cerebral infarction, and seek a better treatment different from the other non-anemia causes. We found that anemia has rendered valuable service to neuronal damage and subsequent deterioration of acute cerebral infarction in the adults...
October 15, 2017: International Journal of Neuroscience
https://www.readbyqxmd.com/read/29034608/nanoparticle-based-therapeutics-for-brain-injury
#19
REVIEW
Vimala N Bharadwaj, Duong T Nguyen, Vikram D Kodibagkar, Sarah E Stabenfeldt
Brain injuries affect a large patient population with major physical and emotional suffering for patients and their relatives; at a significant cost to the society. Effective diagnostic and therapeutic options available for brain injuries are limited by the complex brain injury pathology involving blood-brain barrier (BBB). Brain injuries, including ischemic stroke and brain trauma, initiate BBB opening for a short period of time, which is followed by a second reopening for an extended time. The leaky BBB and/or the alterations in the receptor expression on BBB may provide opportunities for therapeutic delivery via nanoparticles (NPs)...
October 16, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/29034496/clinical-impact-of-the-microembolic-signal-burden-during-catheter-ablation-for-atrial-fibrillation-just-a-lot-of-noise
#20
Christian von Bary, Thomas Deneke, Thomas Arentz, Anja Schade, Heiko Lehrmann, Susanne Schwab-Malek, Sabine Fredersdorf, Dobri Baldaranov, Lars Maier, Felix Schlachetzki
OBJECTIVES: Microembolic signal detection by transcranial Doppler ultrasonography may be considered a surrogate for cerebral events during invasive cardiac procedures. However, the impact of the microembolic signal count during pulmonary vein isolation on the clinical outcome is not well evaluated. We investigated the effect of the microembolic signal count on the occurrence of new silent cerebral embolism measured by diffusion-weighted imaging (DWI)-magnetic resonance imaging (MRI), changes in neuropsychological testing, and the occurrence of clinical events during long-term follow-up after pulmonary vein isolation...
October 16, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
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