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cerebral ischemia-reperfusion

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https://read.qxmd.com/read/30899300/neuroprotective-effects-of-the-new-na-channel-blocker-rs100642-in-global-ischemic-brain-injury
#1
Suat Kamisli, Cenk Basaran, Kadir Batcioglu, Mustafa Namık Oztanir, Mehmet Gul, Basri Satilmis, Ayse Burcin Uyumlu, Basak Kayhan, Metin Genc
Introduction: RS100642, a mexiletine analogue, is a novel sodium channel blocker with neuroprotective and antioxidant activities. The protectivity of RS100642, which has been shown against focal cerebral ischemia, was investigated in global cerebral ischemia in this study. Material and methods: Global cerebral ischemia was induced for five minutes in adult male Wistar Albino rats via the 4-vessel occlusion method. Intravenous administration of 1 mg/kg RS100642 following reperfusion for 30 min (RS100642 group) was compared with a sham treatment group (ischemia group) and nonischemized group (control) histologically based on morphology and caspase-3 immunohistochemistry, and biochemically based both on measurement of oxidative stress including malondialdehyde (MDA) levels, superoxide dismutase (SOD), glutathione peroxidase (GPx) and catalase (CAT) activities and on assessment of apoptosis including caspase-3 and -8 activities and tumor necrosis factor α (TNF-α) levels at the end of 6 h...
March 2019: Archives of Medical Science: AMS
https://read.qxmd.com/read/30899173/effect-of-sargentodoxa-cuneata-total-phenolic-acids-on-focal-cerebral-ischemia-reperfusion-injury-rats-model
#2
Ming Bai, Baosong Liu, Mengfan Peng, Jiaojiao Jia, Xiaoyan Fang, Mingsan Miao
Objective: Explore the possible protective effect of Sargentodoxa cuneata total phenolic acids on cerebral ischemia reperfusion injury rats. Methods: Focal cerebral ischemia reperfusion rats model were established by linear thrombus. Nimodipine group, Naoluotong group, the high, middle and low dose of Sargentodoxa cuneata total phenolic acids groups were given related drugs via intragastric administration before operation for seven days, once a day. At the same time sham operation group, and ischemia reperfusion group were given the same volume of physiological saline...
March 2019: Saudi Journal of Biological Sciences
https://read.qxmd.com/read/30897756/neuroprotective-effects-of-ginsenosides-against-cerebral-ischemia
#3
Zhekang Cheng, Meng Zhang, Chengli Ling, Ying Zhu, Hongwei Ren, Chao Hong, Jing Qin, Tongxiang Liu, Jianxin Wang
Ginseng has been used worldwide as traditional medicine for thousands of years, and ginsenosides have been proved to be the main active components for their various pharmacological activities. Based on their structures, ginsenosides can be divided into ginseng diol-type A and ginseng triol-type B with different pharmacological effects. In this study, six ginsenosides, namely ginsenoside Rb1, Rh2, Rg3, Rg5 as diol-type ginseng saponins, and Rg1 and Re as triol-type ginseng saponins, which were reported to be effective for ischemia-reperfusion (I/R) treatment, were chosen to compare their protective effects on cerebral I/R injury, and their mechanisms were studied by in vitro and in vivo experiments...
March 20, 2019: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://read.qxmd.com/read/30895440/neuroprotective-influence-of-mir-301a-inhibition-in-experimental-cerebral-ischemia-reperfusion-rat-models-through-targeting-ndrg2
#4
Tao Feng, Bang-Hua Han, Gong-Li Yang, Chao-Jie Shi, Zhen-Wen Gao, Ming-Zhi Cao, Xiao-Lei Zhu
The objective of this study is to find out the potential influence of miR-301a in an experimental cerebral ischemia-reperfusion (I/R) rat model through targeting NDRG2. Rats with cerebral I/R injury were constructed and classified into model, miR-301a inhibitor, miR-301a mimic, NC (negative control), siNDRG2, NDRG2, and miR-301a inhibitor + si-NDRG2 groups, as well as another sham group. Cerebral infarct volume and cell apoptosis were observed by TTC staining and TUNEL staining. The targeting relationship between miR-301a and NDRG2 was verified by luciferase assay...
March 20, 2019: Journal of Molecular Neuroscience: MN
https://read.qxmd.com/read/30891571/a-new-animal-model-for-uterine-torsion-and-uterine-ischemia-reperfusion-studies-but-not-fetal-hypoxia-studies
#5
Halef Dogan, Necati Timurkaan, Nevzat Saat, Ibrahim Seker, Ali Risvanli
The aim of the present study was to develop a new animal model for use in uterine torsion, uterine ischemia-reperfusion, and fetal hypoxia studies in rats. A total of 14 pregnant rats on their 18th-19th gestational days were used. The animals were randomly divided into two groups: those undergoing the shame operation (group 1), and those in which a 360 uterine torsion was performed using a novel technique, which was corrected 6 hours later (group 2). Subsequently, seven female and seven male rat pups aged 1 month were separated from the mothers in each group...
September 2018: Animal Models and Experimental Medicine
https://read.qxmd.com/read/30878364/plasma-levels-of-mir-125b-5p-and-mir-206-in-acute-ischemic-stroke-patients-after-recanalization-treatment-a-prospective-observational-study
#6
Xin-Wei He, Yan-Hui Shi, Rong Zhao, Yi-Sheng Liu, Ge-Fei Li, Yue Hu, Wei Chen, Guo-Hong Cui, Jing-Jing Su, Jian-Ren Liu
INTRODUCTION: Multiple microRNAs (miRNAs) participate in the response to hypoxic/ischemic and ischemia-reperfusion events. However, the expression of these miRNAs in circulation from patients with acute ischemic stroke (AIS) receiving recanalization treatment has not been examined, and whether they are associated with the severity and outcome of stroke is still unknown. MATERIALS AND METHODS: In this prospective cohort study, plasma levels of miR-125b-5p, miR-15a-3p, miR-15a-5p, and miR-206 were measured at 24hours after thrombolysis with or without endovascular treatment in 94 patients with AIS, as determined by qRT-PCR...
March 14, 2019: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://read.qxmd.com/read/30876978/vitexin-protects-against-ischemia-reperfusion-induced-brain-endothelial-permeability
#7
Yu-Huan Cui, Xiao-Qing Zhang, Nai-Dong Wang, Mao-Dong Zheng, Juan Yan
Brain endothelial permeability plays a crucial role in blood-brain barrier (BBB), but the permeability enhancement in cerebral ischemia reperfusion (I/R). Vitexin has certain neuroprotective effects, but the effect brain endothelial permeability in I/R injury was unknown. In this study, the effects of Vitexin on endothelial permeability and the underlying mechanisms in human brain microvascular endothelial cells (HBMEc) I/R injury model were investigated. Cell viability, lactate dehydrogenase (LDH), inflammation and apoptosis were detected...
March 12, 2019: European Journal of Pharmacology
https://read.qxmd.com/read/30875657/microrna-128-enhances-neuroprotective-effects-of-dexmedetomidine-on-neonatal-mice-with-hypoxic-ischemic-brain-damage-by-targeting-wnt1
#8
Hua Fang, Hua-Feng Li, Miao Yang, Ru-Rong Wang, Quan-Yun Wang, Peng-Cheng Zheng, Fang-Xiang Zhang, Jian-Ping Zhang
OBJECTIVE: Hypoxic-ischemic brain damage (HIBD) is a major cause of acute mortality and chronic neurological morbidity in infants and children. Dexmedetomidine (DEX) is an effective choice in HIBD treatment. Recent findings have revealed that microRNA-128 (miR-128) is implicated in cerebral ischemia reperfusion. Hence, this study aimed to investigate the role of miR-128 in HIBD. METHODS: HIBD models of neonatal mice were established. HIBD mice were treated with DEX, and injected with agomir (ago)-miR-128 or antagomir (anti)-miR-128 into the lateral ventricles to explore the influence of miR-128 on the neuroprotective effects of DEX on HIBD...
March 12, 2019: Biomedicine & Pharmacotherapy
https://read.qxmd.com/read/30872184/the-effects-of-epothilone-d-on-microtubule-degradation-and-delayed-neuronal-death-in-the-hippocampus-following-transient-global-ischemia
#9
Tian-Qing Xiong, Ling-Meng Chen, Yue Gui, Tian Jiang, Bai-Hong Tan, Shu-Lei Li, Yan-Chao Li
Disruption of microtubule cytoskeleton plays an important role during the evolution of brain damage after transient cerebral ischemia. However, it is still unclear whether microtubule-stabilizing drugs such as epothilone D (EpoD) have a neuroprotective action against the ischemia-induced brain injury. This study examined the effects of pre- and postischemic treatment with different doses of EpoD on the microtubule damage and the delayed neuronal death in the hippocampal CA1 subfield on day 2 following reperfusion after 13-min global cerebral ischemia...
March 11, 2019: Journal of Chemical Neuroanatomy
https://read.qxmd.com/read/30854014/safflower-yellow-b-protects-brain-against-cerebral-ischemia-reperfusion-injury-through-ampk-nf-kb-pathway
#10
Shibin Du, Youliang Deng, Hongjie Yuan, Yanyan Sun
Inflammation had showed its important role in the pathogenesis of cerebral ischemia and secondary damage. Safflower yellow B (SYB) had neuroprotective effects against oxidative stress-induced brain injuries, but the mechanisms were still largely unknown to us. In this study, we tried to investigate the anti-inflammation effects of SYB and the possible roles of AMPK/NF- κ B signaling pathway on these protective effects. In vivo, brain ischemia/reperfusion (I/R) was induced by transient middle cerebral artery occlusion for 2 h and reperfusion for 20 h...
2019: Evidence-based Complementary and Alternative Medicine: ECAM
https://read.qxmd.com/read/30853895/dose-dependent-influences-of-ethanol-on-ischemic-stroke-role-of-inflammation
#11
Guodong Xu, Chun Li, Anne L Parsiola, Jiyu Li, Kimberly D McCarter, Runhua Shi, William G Mayhan, Hong Sun
Chronic ethanol consumption dose-dependently affects both incidence and prognosis of ischemic stroke. Our goal was to determine whether the influence of chronic ethanol consumption on ischemic stroke is related to an altered inflammatory profile in the brain. Male C57BL/6J mice were divided into six groups and gavage fed with 0.175, 0.35, 0.7, 1.4, 2.8 g/kg/day ethanol or volume-matched water once a day for 8 weeks. Adhesion molecules, microglial activation, neutrophil infiltration, pro- and anti-inflammatory cytokines/chemokines, blood-brain barrier (BBB) permeability, and matrix metallopeptidases (MMPs) in the cerebral cortex before and following a 90-min unilateral middle cerebral artery occlusion (MCAO)/24-h reperfusion were evaluated...
2019: Frontiers in Cellular Neuroscience
https://read.qxmd.com/read/30852719/microglia-derived-adiposomes-are-potential-targets-for-the-treatment-of-ischemic-stroke
#12
Chi-Hsin Lin, Li-Ya Liao, Tsung-Ying Yang, Yi-Jyun Chang, Chia-Wen Tung, Shih-Lan Hsu, Chi-Mei Hsueh
It is known that cerebral ischemia can cause brain inflammation and adiposome can serve as a depot of inflammatory mediators. In the study, the pro-inflammatory and pro-death role of adiposome in ischemic microglia and ischemic brain was newly investigated. The contribution of PPARγ to adiposome formation was also evaluated for the first time in ischemic microglia. Focal cerebral ischemia/reperfusion (I/R) animal model and the in vitro glucose-oxygen-serum deprivation (GOSD) cell model were both applied in the study...
March 9, 2019: Cellular and Molecular Neurobiology
https://read.qxmd.com/read/30847723/limb-remote-ischemic-preconditioning-reduces-repeated-ketamine-exposure-induced-adverse-effects-in-the-developing-brain-of-rats
#13
Ying Liu, An Qi Li, Wan Ma, Yu Bo Gao, Li Qin Deng, Chun Zhang, Jin Hai Meng
Prolonged or repeated exposure to ketamine, a common anesthetic in pediatrics, has been shown to induce neurotoxicity and long-term neurocognitive deficits in the developing brain. Therefore, identification of potential therapeutic targets for preventing or alleviating such neurodegeneration and neuroapoptosis induced by ketamine is urgently needed. Remote ischemic preconditioning of the limb provides neuroprotection in different models of cerebral injury. Thus, the present study aimed to assess whether remote ischemic preconditioning could have a neuroprotective effect against neurotoxicity induced by ketamine...
March 7, 2019: Journal of Molecular Neuroscience: MN
https://read.qxmd.com/read/30844718/higenamine-alleviates-cerebral-ischemia-reperfusion-injury-in-rats
#14
Xiaoping Wang, Xiaojia Li, Wu Jingfen, Deng Fei, Peng Mei
Cerebral ischemia reperfusion (I/R) injury is associated with a high incidence of neurological morbidity and mortality worldwide. Higenamine has anti-inflammatory, anti-oxidative and anti-apoptotic capacities and has been successfully used in myocardial and intestinal ischemia reperfusion. We hypothesized that higenamine might serve the same effects in cerebral I/R. In a rat model of cerebral I/R, higenamine improved functional state of nerves, significantly inhibited the I/R-induced increase in the serum level of tumor necrosis factor α (TNF-alpha) and interleukins (ILs) such as IL-1, IL-6 and IL-18, and CD14+ cells, while decreasing the axonal nerve degeneration...
March 1, 2019: Frontiers in Bioscience (Landmark Edition)
https://read.qxmd.com/read/30843941/effects-of-icariside-ii-on-brain-tissue-oxidative-stress-and-nrf2-ho-1-expression-in-rats-with-cerebral-ischemia-reperfusion-injury1
#15
Yan Li, Fanjun Meng
PURPOSE: To investigate the effects of icariside II on brain tissue oxidative stress and Nrf2/HO-1 expression in rats with cerebral ischemia-reperfusion injury (CIRI). METHODS: One hundred SD rats were randomly divided into sham-operated, model, and 5, 10 and 20 mg/kg icariside II groups, 20 rats in each group. The middle cerebral artery occlusion model (ischemia for 2 h followed by reperfusion for 24 h) was established in the later 4 groups. In later 3 groups, at reperfusion beginning, the rats were intragastrically administrated with 5, 10 and 20 mg/kg icariside II, respectively...
February 28, 2019: Acta Cirúrgica Brasileira
https://read.qxmd.com/read/30843911/exosomes-from-lps-stimulated-macrophages-induce-neuroprotection-and-functional-improvement-after-ischemic-stroke-by-modulating-microglial-polarization
#16
Yan Zheng, Ruyi He, Peng Wang, Yijie Shi, Liang Zhao, Jia Liang
Inflammation occurs throughout the progression of cerebral ischemia/reperfusion and mediates myriads of pathological events following an ischemic insult. After ischemic stroke, inflammation was significantly triggered and microglia were activated to phenotypes (M1) typically releasing pro-inflammatory mediators, thus inducing neuron apoptosis and exacerbating brain injury. Therefore, shifting the polarization of microglia from the detrimental pro-inflammatory M1 phenotype to the beneficial anti-inflammatory M2 phenotype seems a promising therapeutic strategy in ischemic stroke...
March 7, 2019: Biomaterials Science
https://read.qxmd.com/read/30842304/effect-of-extracranial-lesion-severity-on-outcome-of-endovascular-thrombectomy-in-patients-with-anterior-circulation-tandem-occlusion-analysis-of-the-titan-registry
#17
Mohammad Anadani, Alejandro Spiotta, Ali Alawieh, Francis Turjman, Michel Piotin, Henrik Steglich-Arnholm, Markus Holtmannspötter, Christian Taschner, Sebastian Eiden, Diogo C Haussen, Raul Nogueira, Panagiotis Papanagiotou, Maria Boutchakova, Adnan H Siddiqui, Bertrand Lapergue, Franziska Dorn, Christophe Cognard, Monika Killer-Oberpfalzer, Salvatore Mangiafico, Marc Ribo, Marios-Nikos Psychogios, Marc-Antoine Labeyrie, Mikael Mazighi, Alessandra Biondi, René Anxionnat, Serge Bracard, Sébastien Richard, Benjamin Gory
INTRODUCTION: Endovascular treatment (EVT) for tandem occlusion (TO) of the anterior circulation is complex but effective. The effect of extracranial internal carotid artery (EICA) lesion severity on the outcomes of EVT is unknown. In this study we investigated the effect of EICA lesion severity on the outcomes of tandem occlusion EVT. METHODS: A multicenter retrospective TITAN (Thrombectomy In TANdem lesions) study that included 18 international endovascular capable centers was performed...
March 6, 2019: Journal of Neurointerventional Surgery
https://read.qxmd.com/read/30841465/neurotherapeutic-potential-of-kolaviron-on-neurotransmitter-dysregulation-excitotoxicity-mitochondrial-electron-transport-chain-dysfunction-and-redox-imbalance-in-2-vo-brain-ischemia-reperfusion-injury
#18
Olubukola Benedicta Ojo, Zainab Abiola Amoo, Ibrahim Olabayode Saliu, M Tolulope Olaleye, Ebenezer O Farombi, Afolabi Clement Akinmoladun
This study investigated the effects of post-treatment with kolaviron on a 2-Vessel Occlusion (2-VO) model of cerebral ischemia/reperfusion (I/R) injury in rats to ascertain its level of efficacy as a potential therapeutic agent for stroke. Male Wistar rats submitted to 30 min of bilateral common carotid artery occlusion and 24 h of reperfusion were treated with kolaviron (25-100 mg/kg) or 20 mg/kg quercetin immediately after reperfusion and 2 h post reperfusion. At the end of the period of reperfusion, animals were scored for motor and cognitive deficits...
March 2019: Biomedicine & Pharmacotherapy
https://read.qxmd.com/read/30841460/repression-of-long-non-coding-rna-meg3-restores-nerve-growth-and-alleviates-neurological-impairment-after-cerebral-ischemia-reperfusion-injury-in-a-rat-model
#19
Dong You, Hong You
OBJECTIVE: This study was performed to investigate effect of long non-coding RNA (lncRNA) MEG3 on nerve growth and neurological impairment in a rat model after cerebral ischemia-reperfusion injury (IRI) through the Wnt/β-catenin signaling pathway. METHODS: Rat models of middle cerebral artery occlusion (MCAO) were established to stimulate an environment of cerebral IRI. The modeled rats were subjected to negative control (NC), MEG3, si-MEG3, classical Wnt pathway inhibitor DKK1 or classical Wnt pathway activator LiCl to validate the effect of MEG3 on neurological impairment and nerve growth...
March 2019: Biomedicine & Pharmacotherapy
https://read.qxmd.com/read/30840837/guanine-nucleotide-binding-protein-g-i-%C3%AE-2-aggravates-hepatic-ischemia-reperfusion-injury-in-mice-by-regulating-mlk3-signaling
#20
Qikai Sun, Qifeng He, Jianbo Xu, Qiaoyu Liu, Yijun Lu, Zechuan Zhang, Xiaoliang Xu, Beicheng Sun
Hepatic ischemia-reperfusion (I/R) injury is a major challenge in liver resection and transplantation surgeries. Previous studies have revealed that guanine nucleotide-binding protein G(i)α2 (GNAI2) was involved in the progression of myocardial and cerebral I/R injury, but the role and function of GNAI2 in hepatic I/R have not been elucidated. The hepatocyte-specific GNAI2 knockout (GNAI2hep-/- ) mice were generated and subjected to hepatic I/R injury. Primary hepatocytes isolated from GNAI2hep-/- and GNAI2flox/flox mice were cultured and challenged to hypoxia-reoxygenation insult...
March 6, 2019: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
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