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https://www.readbyqxmd.com/read/27914011/activation-of-alpha-7-nicotinic-acetylcholine-receptor-reduces-brain-edema-in-mice-with-ischemic-stroke-and-bone-fracture
#1
Dingquan Zou, Man Luo, Zhenying Han, Lei Zhan, Wan Zhu, Shuai Kang, Chen Bao, Zhao Li, Jeffrey Nelson, Rui Zhang, Hua Su
Stroke is an important risk factor for bone fracture. We showed previously that bone fracture at the acute stage of ischemic stroke worsens, and activation of α-7 nicotinic acetylcholine receptor (α-7 nAchR) improves, stroke recovery by attenuating inflammation. We hypothesized that activation of α-7 nAchR also improves the blood-brain barrier (BBB) integrity. Permanent distal middle cerebral artery occlusion (pMCAO) was performed on C57BL/6J mice followed by tibia fracture 1 day later. Mice were treated with 0...
December 2, 2016: Molecular Neurobiology
https://www.readbyqxmd.com/read/27913263/experience-with-adapt-for-thrombectomy-in-distal-cerebral-artery-occlusions-causing-acute-ischemic-stroke
#2
Jan Vargas, Alex M Spiotta, Kyle Fargen, Raymond D Turner, Imran Chaudry, Aquilla Turk
BACKGROUND: Thromboembolic occlusion of distal branches in anterior and posterior circulation may produce severe clinical deficits. The ADAPT technique is a simple, fast method for achieving good angiographic and clinical outcomes using large bore catheters in large vessel occlusions. OBJECTIVE: We present our results using the ADAPT technique with distal cerebral artery occlusions. METHODS: Thirty-five patients with acute ischemic stroke with thrombus in the distal MCA, ACA, or PCA were treated with the ADAPT technique...
November 29, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27910195/mulberrofuran-g-protects-ischemic-injury-induced-cell-death-via-inhibition-of-nox4-mediated-ros-generation-and-er-stress
#3
Sungeun Hong, Jaeyoung Kwon, Dong-Woo Kim, Hak Ju Lee, Dongho Lee, Woongchon Mar
The aim of this study was to investigate the neuroprotective effect of mulberrofuran G (MG) in in vitro and in vivo models of cerebral ischemia. MG was isolated from the root bark of Morus bombycis. MG inhibited nicotinamide adenine dinucleotide phosphate oxidase (NOX) enzyme activity and oxygen-glucose deprivation/reoxygenation (OGD/R)-induced NOX4 protein expression in SH-SY5Y cells. MG inhibited the expression of activated caspase-3 and caspase-9 and cleaved poly adenine dinucleotide phosphate-ribose polymerase in OGD/R-induced SH-SY5Y cells...
December 2, 2016: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/27910074/evolutional-characterization-of-photochemically-induced-stroke-in-rats-a-multimodality-imaging-and-molecular-biological-study
#4
Nai-Wei Liu, Chien-Chih Ke, Yonghua Zhao, Yi-An Chen, Kim-Chuan Chan, David Tat-Wei Tan, Jhih-Shian Lee, You-Yin Chen, Tun-Wei Hsu, Ya-Ju Hsieh, Chi-Wei Chang, Bang-Hung Yang, Wen-Sheng Huang, Ren-Shyan Liu
Photochemically induced cerebral ischemia is an easy-manipulated, reproducible, relatively noninvasive, and lesion controllable model for translational study of ischemic stroke. In order to longitudinally investigate the characterization of the model, magnetic resonance imaging, (18)F-2-deoxy-glucose positron emission tomography, fluorescence, and bioluminescence imaging system were performed in correlation with triphenyl tetrazolium chloride (TTC), hematoxylin-eosin staining, and immunohistochemistry examinations of glial fibrillary acidic protein, CD68, NeuN, von willebrand factor, and α-smooth muscle actin in the infarct zone...
December 1, 2016: Translational Stroke Research
https://www.readbyqxmd.com/read/27909732/early-vegf-inhibition-attenuates-blood-brain-barrier-disruption-in-ischemic-rat-brains-by-regulating-the-expression-of-mmps
#5
Hai-Tao Zhang, Ping Zhang, Yi Gao, Chen-Long Li, Hong-Jun Wang, Ling-Chao Chen, Yan Feng, Rui-Yan Li, Yong-Li Li, Chuan-Lu Jiang
Vascular endothelial growth factor (VEGF) inhibition has been demonstrated to be an effective strategy in preserving the integrity of the blood-brain barrier (BBB) in patients with acute ischemic stroke. Loss of the BBB is the key event associated with morbidity and mortality in these patients. However, the underlying mechanisms remain poorly understood. In the present study, the effects of VEGF inhibition and the possible mechanism that underlies acute cerebral ischemia in rats was investigated. Following the induction of transient middle cerebral artery occlusion for a 90‑min period, either an anti‑VEGF neutralizing antibody (RB‑222; 5 or 10 µg), or IgG (control), was administered by intracerebroventricular injection at 1 h following reperfusion...
November 29, 2016: Molecular Medicine Reports
https://www.readbyqxmd.com/read/27909265/prevention-of-the-collapse-of-pial-collaterals-by-remote-ischemic-perconditioning-during-acute-ischemic-stroke
#6
Junqiang Ma, Yonglie Ma, Bin Dong, Mischa V Bandet, Ashfaq Shuaib, Ian R Winship
Collateral circulation is a key variable determining prognosis and response to recanalization therapy during acute ischemic stroke. Remote ischemic perconditioning (RIPerC) involves inducing peripheral ischemia (typically in the limbs) during stroke and may reduce perfusion deficits and brain damage due to cerebral ischemia. In this study, we directly investigated pial collateral flow augmentation due to RIPerC during distal middle cerebral artery occlusion (MCAo) in rats. Blood flow through pial collaterals between the anterior cerebral artery (ACA) and the MCA was assessed in male Sprague Dawley rats using in vivo laser speckle contrast imaging (LSCI) and two photon laser scanning microscopy (TPLSM) during distal MCAo...
December 1, 2016: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/27908279/co-existing-intracranial-and-extracranial-carotid-artery-atherosclerotic-plaques-and-recurrent-stroke-risk-a-three-dimensional-multicontrast-cardiovascular-magnetic-resonance-study
#7
Yilan Xu, Chun Yuan, Zechen Zhou, Le He, Donghua Mi, Rui Li, Yuanyuan Cui, Yilong Wang, Yongjun Wang, Gaifen Liu, Zhuozhao Zheng, Xihai Zhao
BACKGROUND: As a systemic disease, atherosclerosis commonly affects intracranial and extracranial carotid arteries simultaneously which is defined as co-existing plaques. Previous studies demonstrated that co-existing atherosclerotic diseases are significantly associated with ischemic cerebrovascular events. The aim of this study was to investigate the characteristics of co-existing intracranial and extracranial carotid atherosclerotic plaques and their relationships with recurrent stroke by using 3D multi-contrast magnetic resonance (MR) vessel wall imaging...
December 2, 2016: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/27907969/neuroprotection-in-critical-care-neurology
#8
Menno R Germans, Hieronymus D Boogaarts, R Loch Macdonald
Ischemic stroke, intracerebral hemorrhage, subarachnoid hemorrhage, and traumatic brain injury-all have in common early brain injury due to brain tissue destruction, reduced cerebral blood flow and oxygen delivery, and overall substantial morbidity and mortality. The pathophysiology of brain tissue damage likely includes common cellular mechanisms. Neuroprotection has seldom, if ever, been shown to reduce early brain injury. Secondary brain injury develops after these conditions due to macroscopic events such as increased intracranial pressure and reduced cerebral blood flow, as well as cellular processes including vascular damage, inflammation, and apoptotic/necrotic cell death...
December 2016: Seminars in Neurology
https://www.readbyqxmd.com/read/27907954/today-s-approach-to-treating-brain-swelling-in-the-neuro-intensive-care-unit
#9
Shreyansh Shah, W Taylor Kimberly
Brain swelling is an urgent clinical problem that frequently accompanies ischemic stroke, brain hemorrhage, and traumatic brain injury; it increases morbidity and mortality associated with them. It occurs due to failure of membrane transporters and leakage of the blood-brain barrier (BBB), resulting in combination of cytotoxic, ionic, and vasogenic edema. Currently, decompressive craniectomy and osmotherapy are the mainstays of management, but these therapies do not halt the underlying molecular cascade leading to brain swelling...
December 2016: Seminars in Neurology
https://www.readbyqxmd.com/read/27907083/effects-of-acute-systemic-hypoxia-and-hypercapnia-on-brain-damage-in-a-rat-model-of-hypoxia-ischemia
#10
Wanchao Yang, Xuezhong Zhang, Nan Wang, Jing Tan, Xianhai Fang, Qi Wang, Tao Tao, Wenzhi Li
Therapeutic hypercapnia has the potential for neuroprotection after global cerebral ischemia. Here we further investigated the effects of different degrees of acute systemic hypoxia in combination with hypercapnia on brain damage in a rat model of hypoxia and ischemia. Adult wistar rats underwent unilateral common carotid artery (CCA) ligation for 60 min followed by ventilation with normoxic or systemic hypoxic gas containing 11%O2,13%O2,15%O2 and 18%O2 (targeted to PaO2 30-39 mmHg, 40-49 mmHg, 50-59 mmHg, and 60-69 mmHg, respectively) or systemic hypoxic gas containing 8% carbon dioxide (targeted to PaCO2 60-80 mmHg) for 180 min...
2016: PloS One
https://www.readbyqxmd.com/read/27905989/the-histone-deacetylase-inhibitor-sodium-butyrate-exhibits-neuroprotective-effects-for-ischemic-stroke-in-middle-aged-female-rats
#11
Min Jung Park, Farida Sohrabji
BACKGROUND: Sodium butyrate (NaB) is a histone deacetylase (HDAC) inhibitor exhibiting anti-inflammatory and neuroprotective effects in a rat ischemic model of stroke as well as a myocardial ischemia model. Although clinical evidence shows that older women are at higher risk for stroke occurrence and greater stroke severity, no studies have evaluated the effectiveness of NaB either in females or in older animals. METHODS: To determine the effects of NaB on stroke in older females, acyclic middle-aged Sprague-Dawley female rats (9-11 months old, constant diestrus) were subject to middle cerebral artery occlusion (MCAo) by intracerebral injection of recombinant endothelin-1...
December 1, 2016: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/27905692/remote-pre-procedural-ischemic-stroke-was-the-strongest-risk-for-stroke-and-death-associated-with-carotid-stenting-a-single-center-experience
#12
Mária Rašiová, Ľubomír Špak, Ľudmila Farkašová, Štefan Pataky, Martin Koščo, Marek Hudák, Matej Moščovič, Norbert Leško
BACKGROUND: The goal of carotid artery stenting (CAS) is to decrease the stroke risk in patients with carotid stenosis. This procedure carries an immediate risk of stroke and death and many patients do not benefit from it, especially asymptomatic patients. Patient selection for carotid procedure who benefit from procedure and who is the procedure hazardous for is important. Remote ischemic stroke is known risk factor for stroke reccurence during surgery. The aim of our study was to determine the periprocedural complication risk (within 30 days after CAS) associated with carotid stenting (stroke, death) between patients with remote pre- procedural ischemic stroke and without it; to analyse periprocedural risk in other specific patient subgroups treated with CAS and to determine the impact of observed variables on all- cause mortality during long-term follow-up...
December 1, 2016: International Angiology: a Journal of the International Union of Angiology
https://www.readbyqxmd.com/read/27905390/-pr%C3%B0-gnosis-of-motor-function-recovery-in-ischemic-stroke-using-diffusion-tensor-mri
#13
M Yu Maksimova, T A Popova, R N Konovalov
AIM: To identify factors of motor recovery in ischemic stroke (IS) using diffusion tensor imaging (DTI). MATERIAL AND METHODS: Forty-seven patients with IS were studied within 1-2, 7-8, 14-15, 20-21 days after stroke. The fractional anisotropy (FA) values of the pyramidal tract were measured in the posterior limb of the internal capsule, cerebral peduncle and pons. Relative values of FA (rFA) ratio (rFA=FA affected side/FA unaffected side) were assessed as well...
2016: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/27905385/-a-role-of-genetic-factors-and-related-disorder-of-the-folate-cycle-in-ischemic-stroke
#14
V M Shklovsky, I P Lukashevich, A Yu Remennik, S M Gerasimova, G S Selishchev, D I Malin, V V Valyaeva
AIM: To study a role of MTHFR mutations and their associations with the disturbances of basic parameters of the folate cycle in the development of ischemic stroke (IS). MATERIAL AND METHODS: Fifty-one post-stroke patients, 26 women and 25 men, aged from 29 to 87 years, were included in the study. The control group consisted of 47 healthy people, 23 women and 24 men, aged from 30 to 83 years. MTHFR: rs1801131 and rs1801133 polymorphisms were genotyped. Contents of folate, B12 and homocysteine were measured...
2016: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/27905384/-oxidative-stress-as-an-indicator-of-metabolic-disorders-in-the-pathogenesis-of-cerebral-stroke
#15
M A Lutsky, A M Zemskov, V V Razuvaeva, Yu P Lushnikova, O Yu Karpova
AIM: To verify the oxidative stress as an indicator of metabolic disorders in the complex pathogenesis of hemorrhagic and ischemic stroke. MATERIAL AND METHODS: The study included 50 hemorrhagic stroke patients and 50 ischemic stroke patients. A control group consisted of 20 age-matched healthy subjects. In total 12 biochemical parameters, including blood indicators, indicators of free-radical oxidation (ketodiens, diene conjugates, malonic aldehyde, bityrosin, Schiff bases) and endogenous system antioxidant defense (vitamin E, reduced glutathione, total antioxidative activity, superoxide dismutase, glutathione peroxidase, glutathione reductase, catalase) were determined...
2016: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/27905383/-the-role-of-atp-dependent-potassium-channels-and-nitric-oxide-system-in-the-neuroprotective-effect-of-preconditioning
#16
O G Deryagin, S A Gavrilova, S V Buravkov, V V Andrianov, G G Yafarova, Kh L Gainutdinov, V B Koshelev
AIM: To study a role of ATP-dependent potassium channels (K+ATP) in the neuroprotective effect of ischemic (IP) and pharmacological (PP) preconditioning and evaluate the dynamics of blood nitric oxide (NO) metabolites in cerebral ischemia. MATERIAL AND METHODS: A model of ischemic stroke induced by the electrocoagulation of a middle cerebral artery (MCA) branch was used in male rats (n=86). Glibenclamide, a selective inhibitor of ATP-sensitive K+ channels, and diazoxide, a potassium channel activator, were used...
2016: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/27903814/blink-associated-contralateral-eccentric-saccades-as-a-rare-sign-of-unilateral-brain-injury
#17
Ilaria Zivi, Eugenio Bertelli, Giacinta Bilotti, Ignazio Alessandro Clemente, Leopold Saltuari, Giuseppe Frazzitta
OBJECTIVE: To describe a rare sign of unilateral brain injury as a form of unwanted blink-associated contralateral eccentric saccades. METHODS: A 62-year-old patient who underwent an ischemic stroke affecting the entire right middle cerebral artery territory came to our attention 1 year after stroke, manifesting with transient contralateral conjugate gaze deviations associated with spontaneous blinking. We complemented the regular neurologic evaluation with brain MRI, study of evoked potentials, electroneurography of the facial nerve, and infrared video-oculoscopy...
November 30, 2016: Neurology
https://www.readbyqxmd.com/read/27902857/quantitative-assessment-of-hyperacute-cerebral-infarction-with-intravoxel-incoherent-motion-mr-imaging-initial-experience-in-a-canine-stroke-model
#18
Qian-Qian Gao, Shan-Shan Lu, Xiao-Quan Xu, Cheng-Jiang Wu, Xing-Long Liu, Sheng Liu, Hai-Bin Shi
PURPOSE: To evaluate the feasibility of intravoxel incoherent motion (IVIM) for the measurement of diffusion and perfusion parameters in hyperacute strokes. MATERIALS AND METHODS: An embolic ischemic model was established with an autologous thrombus in 20 beagles. IVIM imaging was performed on a 3.0 Tesla platform at 4.5 h and 6 h after embolization. Ten b values from 0 to 900 s/mm(2) were fitted with a bi-exponential model to extract perfusion fraction f, diffusion coefficient D, and pseudo-diffusion coefficient D*...
November 30, 2016: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/27902774/intravenous-treatment-with-a-long-chain-omega-3-lipid-emulsion-provides-neuroprotection-in-a-murine-model-of-ischemic-stroke-a-pilot-study
#19
Dirk Berressem, Konrad Koch, Nicole Franke, Jochen Klein, Gunter P Eckert
Single long-chain omega-3 fatty acids (e.g. docosahexaenoic acid (DHA) or eicosapentaenoic acid (EPA)) are known for their neuroprotective properties associated with ischemic stroke. This pilot study aimed to test the effectiveness of an acute treatment with a long-chain omega-3 lipid emulsion (Omegaven 10%®, OGV) that contains fish oil (DHA 18 mg/ml; EPA 21 mg/ml) and α-tocopherol (0.2 mg/ml) in a transient middle cerebral artery occlusion (MCAO) model of ischemic stroke in mice. For this purpose, female CD-1 mice were anesthetized and subjected to 90 minutes of MCAO...
2016: PloS One
https://www.readbyqxmd.com/read/27900597/l-pgds-mediates-vagus-nerve-stimulation-induced-neuroprotection-in-a-rat-model-of-ischemic-stroke-by-suppressing-the-apoptotic-response
#20
Lina Zhang, Jingxi Ma, Xinhao Jin, Gongwei Jia, Ying Jiang, Changqing Li
The role of lipocalin prostaglandin D2 synthase (L-PGDS) in brain ischemia has not been fully clarified to date. Vagus nerve stimulation (VNS) protects against cerebral ischemia/reperfusion (I/R) injury, but the mechanisms involved need further exploration. This study investigated the role of L-PGDS in cerebral I/R and whether this process was involved in the mechanism of VNS-mediated neuroprotection. Male Sprague-Dawley rats were pretreated with a lentiviral vector (LV) through intracerebroventricular injection, followed by middle cerebral artery occlusion (MCAO) and VNS treatment...
November 29, 2016: Neurochemical Research
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