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https://www.readbyqxmd.com/read/28647597/hypoxic-postconditioning-improves-behavioural-deficits-at-6-weeks-following-hypoxic-ischemic-brain-injury-in-neonatal-rats
#1
Jonathan D Teo, Margaret J Morris, Nicole M Jones
Hypoxic-ischemic (HI) brain injury in newborns is associated with high morbidity and mortality, with many babies suffering neurological deficits. Recently, we showed that hypoxic postconditioning (PostC) immediately post injury can protect against HI up to one week in neonatal rats. Here, we aimed to examine whether long term functional deficits were also improved by PostC. Sprague-Dawley rats were assigned to control (C) or HI group on postnatal day 7 (P7). The HI group underwent unilateral carotid artery occlusion followed by hypoxia (7% oxygen, 3h)...
June 21, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28647417/recurrent-thromboembolic-events-after-ischemic-stroke-in-patients-with-primary-brain-tumors
#2
Neal S Parikh, Jaclyn E Burch, Hooman Kamel, Lisa M DeAngelis, Babak B Navi
BACKGROUND: Stroke mechanisms and the risk of recurrent thromboembolism are incompletely understood in patients with primary brain tumors. We sought to better delineate these important clinical features. METHODS: We performed a retrospective cohort study of adults with primary brain tumors diagnosed with magnetic resonance imaging-confirmed acute ischemic stroke at the Memorial Sloan Kettering Cancer Center from 2005 to 2015. Study neurologists collected data on patients' cancer history, stroke risk factors, treatments, and outcomes...
June 21, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28641538/glt-1-upregulation-as-a-potential-therapeutic-target-for-ischemic-brain-injury
#3
Yu-Yan Hu, Li Li, Xiao-Hui Xian, Min Zhang, Xiao-Cai Sun, Shu-Qin Li, Xin Cui, Jie Qi, Wen-Bin Li
Glutamate is the primary excitatory neurotransmitter in the mammalian central nervous system, which plays an important role in many aspects of normal brain function such as neural development, motor functions, learning and memory etc. However, excessive accumulation of glutamate in the extracellular fluid will induce excitotoxicity which is considered to be a major mechanism of cell death in brain ischemia. There is no enzyme to decompose the glutamate in extracellular fluid, so extracellular glutamate homeostasis within the central nervous system is mainly regulated by the uptake activity of excitatory amino acid transporters...
June 22, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28639375/challenges-in-regenerating-the-diabetic-heart-a-comprehensive-review
#4
REVIEW
Venkata R Satthenapalli, Regis R Lamberts, Rajesh Katare
Stem cell therapy is one of the promising regenerative strategies developed to improve cardiac function in patients with ischemic heart diseases (IHD). However, this approach is limited in IHD patients with diabetes due to a progressive decline in the regenerative capacity of stem cells. This decline is mainly attributed to the metabolic memory incurred by diabetes on stem cell niche and their systemic cues. Understanding the molecular pathways involved in the diabetes-induced deterioration of stem cell function will be critical for developing new cardiac regeneration therapies...
June 22, 2017: Stem Cells
https://www.readbyqxmd.com/read/28604410/feasibility-and-neurobehavioral-changes-of-10-day-simulated-microgravity-in-acute-ischemic-stroke-patients
#5
Kyo-In Koo, Dae Kwon Park, Chang Ho Hwang
OBJECTIVE: The aim of the study was to investigate feasibility and functional changes of simulated microgravity with 6-degree head-down-tilt (HDT) bed rest in acute ischemic stroke. DESIGN: Patients without lesions in the cingulate cortex and/or cerebellum were enrolled. They underwent HDT for 30 minutes twice per day for 10 weekdays. Systolic blood pressure, diastolic blood pressure, and heart rate were measured before the HDT, immediately after, and also 30 minutes after the stop...
June 9, 2017: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/28599922/vitamin-d-improves-functional-outcomes-in-neonatal-hypoxic-ischemic-male-rats-treated-with-n-acetylcysteine-and-hypothermia
#6
Danielle W Lowe, Jamie L Fraser, Laura Grace Rollins, Jessica Bentzley, Xingju Nie, Renee Martin, Inderjit Singh, Dorothea Jenkins
Hypothermia treatment neuroprotects approximately 50% of neonates who present with moderate to severe hypoxic ischemic encephalopathy (HIE). N-acetylcysteine (NAC), a potent antioxidant, is neuroprotective in combination with hypothermia in neonatal hypoxia-ischemia (HI) female rats, but less protective in males. Vitamin D is a neurosteroid, which may provide immunomodulation and improve outcomes for both sexes. We investigated the efficacy of this combination of drugs with hypothermia after severe HI, as well as potential mechanisms of vitamin D effects in the transition to chronic inflammation...
June 6, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28595184/neuropsychological-profiles-differentiate-alzheimer-disease-from-subcortical-ischemic-vascular-dementia-in-an-autopsy-defined-cohort
#7
Liliana Ramirez-Gomez, Ling Zheng, Bruce Reed, Joel Kramer, Dan Mungas, Chris Zarow, Harry Vinters, John M Ringman, Helena Chui
BACKGROUND/AIMS: The aim of this study was to assess the ability of neuropsychological tests to differentiate autopsy-defined Alzheimer disease (AD) from subcortical ischemic vascular dementia (SIVD). METHODS: From a sample of 175 cases followed longitudinally that underwent autopsy, we selected 23 normal controls (NC), 20 SIVD, 69 AD, and 10 mixed cases of dementia. Baseline neuropsychological tests, including Memory Assessment Scale word list learning test, control oral word association test, and animal fluency, were compared between the three autopsy-defined groups...
June 9, 2017: Dementia and Geriatric Cognitive Disorders
https://www.readbyqxmd.com/read/28584000/ischemic-amnesia-causes-and-outcome
#8
Patrik Michel, Valérie Beaud, Ashraf Eskandari, Philippe Maeder, Jean-François Demonet, Elissavet Eskioglou
BACKGROUND AND PURPOSE: We aimed to describe the frequency and characteristics of acute ischemic stroke and transient ischemic attacks presenting predominantly with amnesia (ischemic amnesia) and to identify clinical clues for differentiating them from transient global amnesia (TGA). METHODS: We retrospectively analyzed and described all patients presenting with diffusion-weighted imaging magnetic resonance imaging-confirmed acute ischemic stroke/transient ischemic attacks with antero- and retrograde amnesia as the main symptom over a 13...
June 5, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28576310/the-paracrine-effect-of-cobalt-chloride-on-bmscs-during-cognitive-function-rescue-in-the-hibd-rat
#9
Ying Dai, Wendi Li, Min Zhong, Jie Chen, Qian Cheng, Youxue Liu, Tingyu Li
Hypoxia-ischemia (HI)-induced perinatal encephalopathy frequently causes chronic neurological morbidities and acute mortality. Bone mesenchymal stem cell (BMSC) transplantation could potentially promote functional and anatomical recovery of ischemic tissue. In vitro hypoxic preconditioning is an effective strategy to improve the survival of BMSCs in ischemic tissue. In this study, cobalt chloride (CoCl2) preconditioned medium from BMSC cultures was injected into the left lateral ventricle of HI rats using a micro-osmotic pump at a flow rate 1...
May 30, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28565820/beneficial-effects-of-jiawei-shenqi-wan-and-treadmill-training-on-deficits-associated-with-neonatal-hypoxic-ischemia-in-rats
#10
Ha Neui Kim, Malk Eun Pak, Myung Jun Shin, Soo Yeon Kim, Yong Beom Shin, Young Ju Yun, Hwa Kyoung Shin, Byung Tae Choi
Jiawei Shenqi-wan (JSQW), which comprises Shenqi-wan and two additional medicinal herbs, has been widely used for the treatment of various growth impairments, including cerebral palsy. In the present study, JSQW was administered to hypoxic-ischemic Sprague-Dawley rats that underwent treadmill training from 4-7 weeks of age to examine the beneficial effects of combined JSQW and treadmill therapy. Behavioral examinations were performed and a significant improvement in cylinder test performance was observed in rats treated with treadmill training compared with hypoxic-ischemia rats (P<0...
May 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28549819/rivaroxaban-for-stroke-prevention-in-patients-with-nonvalvular-atrial-fibrillation-and-active-cancer
#11
Eva S Laube, Anthony Yu, Dipti Gupta, Yimei Miao, Patrick Samedy, Jonathan Wills, Stephen Harnicar, Gerald A Soff, Simon Mantha
Rivaroxaban is broadly used for the primary prevention of stroke and systemic embolism in the general population with nonvalvular atrial fibrillation (AF). However, there is little published evidence on the safety and efficacy of rivaroxaban for AF in patients with active cancer. The aim of this study was to assess the safety and efficacy of rivaroxaban in patients with active cancer and AF. The use of rivaroxaban in patients with cancer at the Memorial Sloan Kettering Cancer Center is monitored in the setting of a Quality Assessment Initiative...
July 15, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28547878/mesiotemporal-atrophy-and-hippocampal-diffusivity-distinguish-amnestic-from-non-amnestic-vascular-cognitive-impairment
#12
A A Hosseini, D Meng, R J Simpson, D P Auer
BACKGROUND AND PURPOSE: The role of clinical factors, cerebral infarcts and hippocampal damage in vascular cognitive impairment (VCI) subtypes remains unclear. METHODS: Non-demented patients with carotid stenosis and recent transient ischemic attack/stroke had cognitive assessment and brain magnetic resonance imaging (MRI). Amnestic VCI was defined as memory impairment; non-amnestic VCI was any other subdomain impairment. Associations of MRI metrics [log-transformed total ischemic lesion load (log TILL), mesiotemporal atrophy (MTA) score, hippocampal mean diffusivity (hipMD)] with cognitive performance were assessed...
May 26, 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/28538801/effects-of-hyperbaric-oxygen-and-nerve-growth-factor-on-the-long-term-neural-behavior-of-neonatal-rats-with-hypoxic-ischemic-brain-damage
#13
Lixia Wei, Qing Ren, Yongjun Zhang, Jiwen Wang
Purpose: To evaluate the effects of HBO (Hyperbaric oxygen) and NGF (Nerve growth factor) on the long-term neural behavior of neonatal rats with HIBD (Neonatal hypoxic ischemic brain damage). Methods: The HIBD model was produced by ligating the right common carotid artery of 7 days old SD (Sprague-Dawley) rats followed by 8% O2 + 92% N2 for 2h. Totally 40 rats were randomly divided into 5 groups including sham-operated group, HIBD control group, HBO treated group, NGF treated group and NGF + HBO treated group...
April 2017: Acta Cirúrgica Brasileira
https://www.readbyqxmd.com/read/28508173/neuroprotective-effects-of-lycium-barbarum-polysaccharide-on-focal-cerebral-ischemic-injury-in-mice
#14
Peng Zhao, Ru Zhou, Xiao-Yun Zhu, Gang Liu, Yu-Ping Zhao, Peng-Sheng Ma, Wei Wu, Yang Niu, Tao Sun, Yu-Xiang Li, Jian-Qiang Yu, Zhong-Ming Qian
Increasing evidence demonstrates inflammation contributes to neuronal death following cerebral ischemia. Lycium barbarum polysaccharide (LBP) has been reported to prevent scopolamine-induced cognitive and memory deficits. We recently indicated that LBP exerts neuroprotective effect against focal cerebral ischemic injury in mice via attenuating the mitochondrial apoptosis pathway. The aim of this study was to investigate the neuroprotective effects of LBP against the behavioral dysfunction induced by focal cerebral ischemia injury in mice...
May 15, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28506806/selective-associative-phonagnosia-after-right-anterior-temporal-stroke
#15
Simona Luzzi, Michela Coccia, Gabriele Polonara, Carlo Reverberi, Gabriella Ceravolo, Mauro Silvestrini, Fabio Fringuelli, Sara Baldinelli, Leandro Provinciali, Guido Gainotti
We report the case of a 48 year old men who developed a selective impairment in famous voice recognition after ischemic stroke in right subcortical structures (lenticular nucleus and head of the caudate) and right anterior temporal lobe. He underwent fibrinolytic treatment. During the following days he progressively recovered and was discharged without neurological focal sign. Patent foramen ovale was found. When he got back to his house he noticed that he was unable to recognize the voice of his favoured singers and needed to ask who was the singer to his relatives...
May 12, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28502261/profiles-of-executive-function-across-children-with-distinct-brain-disorders-traumatic-brain-injury-stroke-and-brain-tumor
#16
Gabriel C Araujo, Tanya N Antonini, Vicki Anderson, Kathryn A Vannatta, Christina G Salley, Erin D Bigler, H Gerry Taylor, Cynthia Gerhardt, Kenneth Rubin, Maureen Dennis, Warren Lo, Mark T Mackay, Anne Gordon, Christine Hajek Koterba, Alison Gomes, Mardee Greenham, Keith Owen Yeates
OBJECTIVES: This study examined whether children with distinct brain disorders show different profiles of strengths and weaknesses in executive functions, and differ from children without brain disorder. METHODS: Participants were children with traumatic brain injury (N=82; 8-13 years of age), arterial ischemic stroke (N=36; 6-16 years of age), and brain tumor (N=74; 9-18 years of age), each with a corresponding matched comparison group consisting of children with orthopedic injury (N=61), asthma (N=15), and classmates without medical illness (N=68), respectively...
May 15, 2017: Journal of the International Neuropsychological Society: JINS
https://www.readbyqxmd.com/read/28502042/tale-of-the-good-and-the-bad-cdk5-remodeling-of-the-actin-cytoskeleton-in-the-brain
#17
REVIEW
Kavita Shah, Sandra Rossie
Cdk5 kinase, a cyclin-dependent kinase family member, is a key regulator of cytoskeletal remodeling in the brain. Cdk5 is essential for brain development during embryogenesis. After birth, it is essential for numerous neuronal processes such as learning and memory formation, drug addiction, pain signaling, and long-term behavior changes, all of which rely on rapid alterations in the cytoskeleton. Cdk5 activity is deregulated in various brain disorders including Alzheimer's disease, Parkinson's disease, amyotrophic lateral sclerosis, and ischemic stroke, resulting in profound remodeling of the neuronal cytoskeleton, loss of synapses, and ultimately neurodegeneration...
May 13, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28501693/necrostatin-1-protects-hippocampal-neurons-against-ischemia-reperfusion-injury-via-the-rip3-daxx-signaling-pathway-in-rats
#18
Rongli Yang, Kun Hu, Jieyun Chen, Shiguang Zhu, Lei Li, Hailong Lu, Pingjing Li, Ruiguo Dong
Global cerebral ischemia/reperfusion (I/R) induces selective neuronal injury in CA1 region of hippocampus, leading to severe impairment in behavior, learning and memory functions. However, the molecular mechanism underlying the processes was not elucidated clearly. RIP3 is a key molecular switch connecting apoptosis, necrosis and necroptosis. DAXX, as a novel substrate of RIP3, plays a vital role in ischemia-induced neuronal death. The aim of this study is to investigate the role and mechanism of RIP3/DAXX signaling pathway on neurons in CA1 region of the rat hippocampus after cerebral I/R...
May 10, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28499951/effects-of-task-specific-rehabilitation-training-on-tau-modification-in-rat-with-photothrombotic-cortical-ischemic-damage
#19
Kyung-Lim Joa, Sohee Moon, Ji-Hye Kim, Dong Wun Shin, Kyoung-Hee Lee, Seon Jung, Myeong-Ok Kim, Chang-Hwan Kim, Han-Young Jung, Ju-Hee Kang
Although stroke elicits progressive cognitive decline and is a leading cause of dementia, molecular interplay between stroke and Alzheimer's disease (AD) pathology has not been fully elucidated. Furthermore, studies on the effects of post-stroke rehabilitation on AD pathology are limited. We evaluated the acute effect of stroke on tau modification, and the molecular effects of task-specific training (TST) on tau modification using a model of photochemically-induced thrombosis (PIT)-induced cortical infarction...
May 9, 2017: Neurochemistry International
https://www.readbyqxmd.com/read/28495306/long-term-effects-of-enriched-environment-following-neonatal-hypoxia-ischemia-on-behavior-bdnf-and-synaptophysin-levels-in-rat-hippocampus-effect-of-combined-treatment-with-g-csf
#20
Myrsini Griva, Rosa Lagoudaki, Olga Touloumi, Evangelia Nousiopoulou, Filippos Karalis, Thomas Georgiou, Georgia Kokaraki, Constantina Simeonidou, Despina A Tata, Evangelia Spandou
Increasing evidence shows that exposure to an enriched environment (EE) is neuroprotective in adult and neonatal animal models of brain ischemia. However, the mechanisms underlying this effect remain unclear. The aim of the current study was to investigate whether post-weaning EE would be effective in preventing functional deficits and brain damage by affecting markers of synaptic plasticity in a neonatal rat model of hypoxia-ischemia (HI). We also examined the possibility that granulocyte-colony stimulating factor (G-CSF), a growth factor with known neuroprotective effects in a variety of experimental brain injury models, combined with EE stimulation could enhance the potential beneficial effect of EE...
May 8, 2017: Brain Research
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