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ischemic cerebral edema

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https://www.readbyqxmd.com/read/29353043/progression-of-vasogenic-edema-induced-by-activated-microglia-under-permanent-middle-cerebral-artery-occlusion
#1
Miki Tanaka, Yasuhiro Ishihara, Shodo Mizuno, Atsuhiko Ishida, Christoph F Vogel, Mayumi Tsuji, Takeshi Yamazaki, Kouichi Itoh
Brain edema is a severe complication that accompanies ischemic stroke. Increasing evidence shows that inflammatory cytokines impair tight junctions of the blood-brain barrier, suggesting the involvement of microglia in brain edema. In this study, we examined the role of microglia in the progression of ischemic brain edema using mice with permanent middle cerebral artery occlusion. The intensity of T2-weighted imaging (T2WI) in the cerebral cortex and the striatum was elevated 3 h after occlusion and spread to peripheral regions of the ischemic hemisphere...
January 15, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29348993/delayed-presentation-of-cerebral-air-embolism-from-a-left-atrial-esophageal-fistula-a-case-report-and-review-of-the-literature
#2
Catherine Peterson, Clay Elswick, Vicki Diaz, R Shane Tubbs, Marc Moisi
Air embolism developing from an atrial-esophageal fistula that was created as a complication from an atrial ablation procedure is a rare, yet usually fatal diagnosis. Neurologic manifestations such as meningitis, altered mental status, seizures, strokes, transient ischemic attacks (TIAs), psychiatric changes, and coma can ensue. Imaging of the brain might reveal infarcts, cerebral edema, as well as signs of pneumocephalus. This case describes a 42-year-old male with recent cardiac ablation procedure at an outside hospital for refractory atrial fibrillation (A-fib) who presented with altered mental status, dyspnea and diaphoresis...
November 15, 2017: Curēus
https://www.readbyqxmd.com/read/29343482/par1-biased-signaling-is-required-for-activated-protein-c-in-vivo-benefits-in-sepsis-and-stroke
#3
Ranjeet K Sinha, Yaoming Wang, Zhen Zhao, Xiao Xu, Laurent Burnier, Naveen Gupta, José A Fernandez, Greg Martin, Sergey Kupriyanov, Laurent O Mosnier, Berislav V Zlokovic, John H Griffin
Activated Protein C (APC) cleaves protease activated receptor (PAR)1 in vitro at R46 to initiate beneficial cell signaling; however, thrombin and APC can cleave at R41. To elucidate PAR1-dependent aspects of pharmacologic APC's in vivo mechanisms, we generated C57BL/6 mouse strains carrying QQ41 or QQ46 point mutations in PAR1 (F2r gene). Using these strains, we determined whether or not recombinant murine signaling-selective APC mutants would reduce septic death or provide neuroprotection against ischemic stroke when mice carried PAR1 homozygous mutations that prevent cleavage at either R41 or R46...
January 17, 2018: Blood
https://www.readbyqxmd.com/read/29336360/early-neurological-deterioration-after-recanalization-treatment-in-patients-with-acute-ischemic-stroke-a-retrospective-study
#4
Ying-Bo Zhang, Ying-Ying Su, Yan-Bo He, Yi-Fei Liu, Gang Liu, Lin-Lin Fan
BACKGROUND: Early neurological deterioration (END) is a prominent issue after recanalization treatment. However, few studies have reported the characteristics of END after endovascular treatment (EVT) as so far. This study investigated the incidence, composition, and outcomes of END after intravenous recombinant tissue plasminogen activator (IV rt-PA) and EVT of acute ischemic stroke, and identified risk factors for END. METHODS: Medical records of patients who received recanalization treatment between January 1, 2014, and December 31, 2015 were reviewed...
January 20, 2018: Chinese Medical Journal
https://www.readbyqxmd.com/read/29310908/an-infant-born-to-a-mother-with-anti-n-methyl-d-aspartate-receptor-encephalitis
#5
Nitish Chourasia, Michael W Watkins, Jeremy E Lankford, Joseph S Kass, Ankur Kamdar
BACKGROUND: Anti-N-Methyl-D-Aspartate receptor (NMDAR) encephalitis is an autoimmune disorder that often affects women of childbearing age, and maternal-fetal transfer of anti-NMDAR antibodies during pregnancy has been documented in both symptomatic and asymptomatic women. The effects of these antibodies on the fetus, however, are incompletely understood. PATIENT DESCRIPTION: This term infant exhibited depressed respiratory effort, poor feeding, and abnormal movements after birth...
November 22, 2017: Pediatric Neurology
https://www.readbyqxmd.com/read/29302205/endogenous-agmatine-induced-by-ischemic-preconditioning-regulates-ischemic-tolerance-following-cerebral-ischemia
#6
Jae Hwan Kim, Jae Young Kim, Jin Young Jung, Yong Woo Lee, Won Taek Lee, Seung Kon Huh, Jong Eun Lee
Ischemic preconditioning (IP) is one of the most important endogenous mechanisms that protect the cells against ischemia-reperfusion (I/R) injury. However, the exact molecular mechanisms remain unclear. In this study, we showed that changes in the level of agmatine were correlated with ischemic tolerance. Changes in brain edema, infarct volume, level of agmatine, and expression of arginine decarboxylase (ADC) and nitric oxide synthases (NOS; inducible NOS [iNOS] and neural NOS [nNOS]) were analyzed during I/R injury with or without IP in the rat brain...
December 2017: Experimental Neurobiology
https://www.readbyqxmd.com/read/29290003/inhibition-of-vegf-signaling-reduces-diabetes-exacerbated-brain-swelling-but-not-infarct-size-in-large-cerebral-infarction-in-mice
#7
Eunhee Kim, Jiwon Yang, Keun Woo Park, Sunghee Cho
In light of repeated translational failures with preclinical neuroprotection-based strategies, this preclinical study reevaluates brain swelling as an important pathological event in diabetic stroke and investigates underlying mechanism of the comorbidity-enhanced brain edema formation. Type 2 (mild), type 1 (moderate), and mixed type 1/2 (severe) diabetic mice were subjected to transient focal ischemia. Infarct volume, brain swelling, and IgG extravasation were assessed at 3 days post-stroke. Expression of vascular endothelial growth factor (VEGF)-A, endothelial-specific molecule-1 (Esm1), and the VEGF receptor 2 (VEGFR2) was determined in the ischemic brain...
December 30, 2017: Translational Stroke Research
https://www.readbyqxmd.com/read/29262431/decompressive-craniectomy-for-malignant-middle-cerebral-artery-stroke
#8
Mark M Landreneau, Kevin N Sheth
Advancements in the treatment of ischemic stroke have led to a recent decline in overall stroke mortality, but patients with hemispheric infarcts remain at high risk for death. Recent advances in the approach to this devastating disease include early identification of patients at high risk for swelling and standardized approaches to medical therapy. However, surgical decompression continues to be the most effective treatment for malignant edema from large hemispheric strokes. Patient selection in the past had been strictly limited to younger ages and the nondominant hemisphere...
December 2017: Seminars in Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29234383/goreisan-inhibits-upregulation-of-aquaporin-4-and-formation-of-cerebral-edema-in-the-rat-model-of-juvenile-hypoxic-ischemic-encephalopathy
#9
Yoshiaki Yano, Hajime Yano, Hisaaki Takahashi, Kouhei Yoshimoto, Shinji Tsuda, Kenta Fujiyama, Yusuke Izumo-Shimizu, Ryota Motoie, Masanori Ito, Junya Tanaka, Eiichi Ishii, Mitsumasa Fukuda
Secondary cerebral edema regulation is of prognostic significance in hypoxic-ischemic encephalopathy (HIE), and aquaporin 4 (AQP4) plays an important role in the pathogenesis of cerebral edema. The traditional Japanese herbal medicine Goreisan relieves brain edema in adults; however, its effect and pharmacological mechanism in children are unknown. We investigated the effects of Goreisan on HIE-associated brain edema and AQP4 expression in a juvenile rat model, established by combined occlusion of middle cerebral and common carotid arteries...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29217500/peripheral-neuropathy-as-a-complication-of-diabetic-ketoacidosis-in-a-child-with-newly-diagnosed-diabetes-type-1-case-report
#10
Marta Baszyńska-Wilk, Marta Wysocka-Mincewicz, Anna Świercz, Jolanta Świderska, Magdalena Marszał, Mieczysław Szalecki
BACKGROUND: Neurological complications of diabetic ketoacidosis are considered to be very serious clinical problem. The most common complication is cerebral edema. However this group includes also less common syndromes such as ischemic or hemorrhagic stroke, cerebral venous and sinus thrombosis or very rare peripheral neuropathy. CASE REPORT: We present a case of 9-year old girl with new onset type 1 diabetes, diabetic ketoacidosis, cerebral edema, multifocal vasogenic brain lesions and lower limbs peripheral paresis...
December 8, 2017: Journal of Clinical Research in Pediatric Endocrinology
https://www.readbyqxmd.com/read/29153303/goreisan-prevents-brain-edema-after-cerebral-ischemic-stroke-by-inhibiting-aquaporin-4-upregulation-in-mice
#11
Takafumi Nakano, Chisa Nishigami, Keiichi Irie, Yutaka Shigemori, Kazunori Sano, Yuta Yamashita, Takayuki Myose, Koji Tominaga, Koichi Matsuo, Yoshihiko Nakamura, Hiroyasu Ishikura, Hidetoshi Kamimura, Takashi Egawa, Kenichi Mishima
BACKGROUND: Aquaporin 4 (AQP4) is a water-selective transport protein expressed in astrocytes throughout the central nervous system. AQP4 level increases after cerebral ischemia and results in ischemic brain edema. Brain edema markedly influences mortality and motor function by elevating intracranial pressure that leads to secondary brain damage. Therefore, AQP4 is an important target to improve brain edema after cerebral ischemia. The Japanese herbal Kampo medicine, goreisan, is known to inhibit AQP4 activity...
November 16, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/29151151/long-term-treatment-of-diabetic-rats-with-vanadyl-sulfate-or-insulin-attenuate-acute-focal-cerebral-ischemia-reperfusion-injury-via-their-antiglycemic-effect
#12
Hossein Ahmadi-Eslamloo, Gholam Abbas Dehghani, Seyed Mostafa Shid Moosavi
It is well-known that patients with diabetes mellitus have worse clinical outcomes following acute ischemic stroke. The intensifying effects of diabetes on ischemic brain injury have been shown to be mostly due to hyperglycemia, rather than the lack of insulin direct effects on brain. It is also well-approved that vanadium compounds have insulin-like and anti-diabetic effects, and the present study was designed to compare the protective effects of diabetes treatment with vanadium or insulin on ischemic/reperfused brain injury...
November 19, 2017: Metabolic Brain Disease
https://www.readbyqxmd.com/read/29115588/limb-remote-ischemic-post%C3%A2-conditioning-reduces-injury-and-improves-long%C3%A2-term-behavioral-recovery-in-rats-following-subarachnoid-hemorrhage-possible-involvement-of-the-autophagic-process
#13
Xiang Hu, Tao Lv, Shao-Feng Yang, Xiao-Hua Zhang, Yi-Feng Miao
Hemorrhage‑related neurologic injury is a primary cause of disability and mortality following subarachnoid hemorrhage (SAH). The aim of the present study was to investigate the potential neuroprotective effect and the possible role of autophagy in limb remote ischemic post‑conditioning (RIPostC) using an endovascular puncture rat model of SAH. RIPostC was induced by three cycles of occlusion (10 min) and release (10 min) in the bilateral femoral artery using an aneurysm clip. Early RIPostC began immediately following SAH, delayed RIPostC began following a 30 min delay and the repeated RIPostC group underwent the protocol every day for 3 days...
October 24, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29107638/herniation-despite-decompressive-hemicraniectomy-in-large-hemispherical-ischemic-strokes
#14
Archana Hinduja, Rohan Samant, Dongxia Feng, Yousef Hannawi
BACKGROUND: Despite decompressive hemicraniectomy (DHC), progressive herniation resulting in death has been reported following middle cerebral artery (MCA) strokes. We aimed to determine the surgical parameters measured on brain computed tomography (CT) scan that are associated with progressive herniation despite DHC in large MCA strokes. METHODS: Retrospective chart review of medical records of patients with malignant hemispheric infarction who underwent DHC for cerebral edema was performed...
October 26, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/29101031/a-deficiency-of-the-glun2c-subunit-of-the-n-methyl-d-aspartate-receptor-is-neuroprotective-in-a-mouse-model-of-ischemic-stroke
#15
Adam Holmes, Ning Zhou, Deborah L Donahue, Rashna Balsara, Francis J Castellino
The N-methyl-d-aspartate receptor (NMDAR) ion channel plays a pivotal role in the pathology of ischemic stroke. The functional receptor consists of two GluN1 subunits (a-h) and two GluN2 subunits (A/B/C/D), the expression of which are spatially and temporally regulated in pathological and physiological conditions. While the role of the GluN2A and GluN2B subunit in ischemic stroke has been well developed, the role of the GluN2C subunit in ischemia is not well understood. Following middle carotid artery occlusion (MCAO), GluN2C(-/-) male mice displayed similar volumes of infarct as wild-type (WT) mice...
October 31, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29092734/predictors-of-functional-outcome-and-hemorrhagic-complications-in-acute-ischemic-stroke-patients-treated-with-intravenous-thrombolysis-a-retrospective-analysis%C3%A2
#16
Qinqin Zhao, Wenya Shan, Li Liu, Xuchun Fu, Ping Liu, Yunzhen Hu
Intravenous thrombolysis (IVT) with recombinant tissue plasminogen activator (rt-PA) within 4.5 hours is an effective and routine therapy for acute ischemic stroke (AIS). The purpose of the study was to identify predictors of functional outcome at 3 months and hemorrhagic complications after IVT. A total of 123 AIS patients treated with intravenous alteplase within 4.5 hours after stroke were enrolled. Baseline clinical characteristics, medication and disease history, radiographic and laboratory data were collected...
December 2017: International Journal of Clinical Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/29070584/microrna-130a-regulates-cerebral-ischemia-induced-blood-brain-barrier-permeability-by-targeting-homeobox-a5
#17
Yong Wang, Meng-Die Wang, Yuan-Peng Xia, Yuan Gao, Yi-Yi Zhu, Sheng-Cai Chen, Ling Mao, Quan-Wei He, Zhen-Yu Yue, Bo Hu
Blood-brain barrier (BBB) disruption plays a critical role in brain injury induced by cerebral ischemia, and preserving BBB integrity during ischemia could alleviate cerebral injury. We examined the role of miR-130a in ischemic BBB disruption by using models of rat middle cerebral artery occlusion and cell oxygen-glucose deprivation. We found that ischemia significantly increased microRNA-130a (miR-130a) level and that miR-130a was predominantly from brain microvascular endothelial cells. Antagomir-130a, an antagonist of miR-130a, could attenuate brain edema, lower BBB permeability, reduce infarct volume, and improve neurologic function...
October 25, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28992629/%C3%AE-lipoic-acid-promotes-neurological-recovery-after-ischemic-stroke-by-activating-the-nrf2-ho-1-pathway-to-attenuate-oxidative-damage
#18
Chengmei Lv, Surendra Maharjan, Qingqing Wang, Yongxin Sun, Xu Han, Shan Wang, Zhengchun Mao, Yanming Xin, Bing Zhang
BACKGROUND/AIMS: Alpha-lipoic acid (α-LA) has been demonstrated to be protective against cerebral ischemia injury. Herein, we investigate the neuroprotective effect and underlying mechanisms of α-LA. METHODS: In vivo study, α-LA was administered intravenously upon reperfusion of transient middle cerebral artery occlusion. Garcia score was used to evaluate neurologic recovery. Infarct volume was examined by TTC staining, and oxidative damage was evaluated by ELISA assay...
2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28987197/neuropathology-of-cerebrovascular-diseases
#19
Isidro Ferrer, Noemi Vidal
The chapter describes the epidemiology of cerebrovascular diseases, anatomy of the cerebral blood vessels, pathophysiology of ischemia, hypoxia, hypoxemia, anemic hypoxia, histotoxic hypoxia, carbon monoxide damage, hyperoxid brain damage and decompression sickness, and selective cell and regional vulnerability; diseases of the blood vessels including atherosclerosis, hypertensive angiopathy, small vessel disease, inflammatory vascular diseases, cerebral amyloid angiopathies, CADASIL, CARASIL and other diseases that can lead to cerebrovascular occlusion; intracranial and intraspinal aneurysms and vascular malformations; hematologic disorders that can cause cerebral infarct or hemorrhage; brain ischemic damage; and spontaneous intracranial bleeding...
2017: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/28982595/transgenic-expression-of-hur-increases-vasogenic-edema-and-impedes-functional-recovery-in-rodent-ischemic-stroke
#20
Agnieszka A Ardelt, Randall S Carpenter, Ifeanyi Iwuchukwu, An Zhang, William Lin, Ewa Kosciuczuk, Cyrus Hinkson, Tania Rebeiz, Sydney Reitz, Peter H King
BACKGROUND AND PURPOSE: Ischemic stroke produces significant morbidity and mortality, and acute interventions are limited by short therapeutic windows. Novel approaches to neuroprotection and neurorepair are necessary. HuR is an RNA-binding protein (RBP) which modulates RNA stability and translational efficiency of genes linked to ischemic stroke injury. METHODS: Using a transgenic (Tg) mouse model, we examined the impact of ectopic HuR expression in astrocytes on acute injury evolution after transient middle cerebral artery occlusion (tMCAO)...
November 20, 2017: Neuroscience Letters
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