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Ischemic Stroke cytokine

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https://www.readbyqxmd.com/read/30217406/high-mobility-group-box-1-translocation-and-release-after-hypoxic-ischemic-brain-injury-in-neonatal-rats
#1
Xiaodi Chen, Jiyong Zhang, Boram Kim, Siddhant Jaitpal, Steven S Meng, Kwame Adjepong, Sayumi Imamura, Hidenori Wake, Masahiro Nishibori, Edward G Stopa, Barbara S Stonestreet
Inflammation contributes to neonatal brain injury. Pro-inflammatory cytokines represent key inflammatory meditators in neonatal hypoxic-ischemic (HI) brain injury. The high mobility group box-1 (HMGB1) protein is a nuclear protein with pro-inflammatory cytokine properties when it is translocated from the nucleus and released extracellularly after stroke in adult rodents. We have previously shown that HMGB1 is translocated from the nucleus to cytosolic compartment after ischemic brain injury in fetal sheep. In the current study, we utilized the Rice-Vannucci model to investigate the time course of HMGB1 translocation and release after HI injury in neonatal rats...
September 11, 2018: Experimental Neurology
https://www.readbyqxmd.com/read/30209990/elevation-of-cerebrospinal-fluid-cytokine-chemokines-involved-in-innate-t-cell-and-granulocyte-inflammation-in-pediatric-focal-cerebral-arteriopathy
#2
Kavitha Kothur, Christopher Troedson, Richard Webster, Sushil Bandodkar, Stephanie Chu, Louise Wienholt, Alun Pope, Mark T Mackay, Russell C Dale
Aim To determine the role of inflammation in pediatric transient focal cerebral arteriopathy using cerebrospinal fluid cytokine/chemokines as biomarkers. Methods We measured 32 cytokine/chemokines in acute cerebrospinal fluid collected from children with stroke due to focal cerebral arteriopathy (n = 5) using multiplex immunoassay and compared with two patients with arterial ischemic stroke due to other causes (non-focal cerebral arteriopathy group, vertebral dissection, n = 1; cryptogenic, n = 1), pediatric encephalitis (n = 43), and non-inflammatory neurological disease controls (n = 20)...
September 13, 2018: International Journal of Stroke: Official Journal of the International Stroke Society
https://www.readbyqxmd.com/read/30195619/memory-deficits-and-hippocampal-inflammation-in-cerebral-hypoperfusion-and-reperfusion-in-male-rats-neuroprotective-role-of-vanillic-acid
#3
Seyed Esmaeil Khoshnam, Alireza Sarkaki, Masome Rashno, Yaghoob Farbood
Ischemic stroke is one of the leading causes of neurological deterioration and mortality worldwide. Neuroprotective strategies are being investigated to minimize cognitive deficits after ischemic events. Here we investigated the neuroprotective potential of vanillic acid (VA) in an animal model of transient bilateral common carotid artery occlusion and reperfusion (BCCAO/R). Adult male Wistar rats (250-300 g) were randomly divided in 4 groups and submitted to either cerebral hypoperfusion-reperfusion or a sham surgery after two-weeks of pretreatment with VA and/or normal saline...
September 6, 2018: Life Sciences
https://www.readbyqxmd.com/read/30195027/evidence-that-nlrc4-inflammasome-mediates-apoptotic-and-pyroptotic-microglial-death-following-ischemic-stroke
#4
Luting Poh, Sung-Wook Kang, Sang-Ha Baik, Gavin Yong Quan Ng, David T She, Priyanka Balaganapathy, S Thameem Dheen, Tim Magnus, Mathias Gelderblom, Christopher G Sobey, Edward H Koo, David Y Fann, Thiruma V Arumugam
Stroke is the second leading cause of death in the world and a major cause of long-term disability. Recent evidence has provided insight into a newly described inflammatory mechanism that contributes to neuronal and glial cell death, and impaired neurological outcome following ischemic stroke - a form of sterile inflammation involving innate immune complexes termed inflammasomes. It has been established that inflammasome activation following ischemic stroke contributes to neuronal cell death, but little is known about inflammasome function and cell death in activated microglial cells following cerebral ischemia...
September 5, 2018: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/30174499/plumbagin-inhibits-neuronal-apoptosis-intimal-hyperplasia-and-also-suppresses-tnf-%C3%AE-nf-%C3%AE%C2%BAb-pathway-induced-inflammation-and-matrix-metalloproteinase-2-9-expression-in-rat-cerebral-ischemia
#5
Xiao-Juan Chen, Jian-Guo Zhang, Lan Wu
Cerebral ischemic damage and infarction are well documented in stroke, which is presenting a foremost health concern globally with very high mortality and morbidity rates. Mechanisms that are associated with excitotoxicity, inflammation and oxidative stress are found to be critically involved in ischemic damage. Adverse effects of current therapies are imposing the need in development of neuroprotective agents that are very effective. To explore this we experimentally induced ischemic brain injury and investigated the effects of plumbagin...
September 2018: Saudi Journal of Biological Sciences
https://www.readbyqxmd.com/read/30172704/apoptosis-signal-regulating-kinase-1-silencing-on-astroglial-inflammasomes-in-an-experimental-model-of-ischemic-stroke
#6
So Yeong Cheon, Eun Jung Kim, So Yeon Kim, Jeong Min Kim, Eun Hee Kam, Jong-Kwang Park, Bon-Nyeo Koo
Activation of the inflammasome complex contributes to the inflammatory response and cell death under pathologic conditions. The nucleotide-binding oligomerization domain-like receptor pyrin domain-containing 2 (NLRP2) inflammasome is activated in astrocytes after cerebral ischemia, which can aggravate ischemic damage. Apoptosis signal-regulating kinase 1 (ASK1) is an early activator and immune-regulator after ischemic injury, that can lead to cell death. The objective of the present study was to evaluate the role of ASK1 in controlling NLRP2 inflammasomes in astrocytes after cerebral ischemia...
August 31, 2018: Neuroscience
https://www.readbyqxmd.com/read/30171935/tetramethylpyrazine%C3%A2-2-o%C3%A2-sodium-ferulate-provides-neuroprotection-against-neuroinflammation-and-brain-injury-in-mcao-r-rats-by-suppressing-tlr-4-nf-%C3%AE%C2%BAb-signaling-pathway
#7
Peipei Zhou, Shuzhang Du, Lin Zhou, Zhi Sun, Li Hua Zhuo, Guangwei He, Yan Zhao, Yulin Wu, Xiaojian Zhang
BACKGROUND: Neuroinflammation following cerebral ischemia is a serious risk factor in stroke patients. The purpose of this study was to investigate the neuroprotective effects of tetramethylpyrazine‑2'O‑sodium ferulate (TSF), a structurally modified compound from tetramethylpyrazine and ferulate, on cerebral ischemic injury and the underlying mechanisms. METHODS: Focal transient cerebral ischemia was induced in rat for 2 h by middle cerebral artery occlusion (MCAO) and the protective effect of TSF was studied using different doses of the drug (10...
August 29, 2018: Pharmacology, Biochemistry, and Behavior
https://www.readbyqxmd.com/read/30168601/z-guggulsterone-attenuates-astrocytes-mediated-neuroinflammation-after-ischemia-by-inhibiting-toll-like-receptor-4-pathway
#8
Tianlong Liu, Minna Liu, Tiejun Zhang, Wenxing Liu, Hang Xu, Fei Mu, Danjun Ren, Na Jia, Zhengjun Li, Yi Ding, Aidong Wen, Yuwen Li
Inflammatory damage plays a pivotal role in ischemic stroke pathogenesis and may represent one of the therapeutic targets. Z-Guggulsterone (Z-GS), an active component derived from myrrh, has been used to treat various diseases. The traditional uses suggest that myrrh is a good candidate for anti-inflammatory damage. The present study was to investigate the anti-inflammatory and neuroprotective effects of Z-GS following cerebral ischemic injury, as well as the exact mechanisms behind them. Rat middle cerebral artery occlusion (MCAO) model and in vitro astrocytes oxygen-glucose deprivation (OGD) model were adopted to simulate ischemic stroke...
August 31, 2018: Journal of Neurochemistry
https://www.readbyqxmd.com/read/30151382/therapeutic-effects-of-systemic-administration-of-the-novel-rankl-modified-peptide-mhp1-for-ischemic-stroke-in-mice
#9
Munehisa Shimamura, Hironori Nakagami, Hideo Shimizu, Kouji Wakayama, Tomohiro Kawano, Yuka Ikeda, Hiroki Hayashi, Shota Yoshida, Hideki Mochizuki, Ryuichi Morishita
Microglial healing peptide 1, "MHP1", is a newly developed synthetic peptide composed of the DE and a part of the EF loop of the receptor activator of nuclear factor-кB (NF κ B) ligand (RANKL). Our previous report demonstrated that MHP1 significantly inhibits Toll-like receptor (TLR) 2- and 4-induced inflammation in microglia/macrophages through RANK signaling without osteoclast activation. However, its inhibitory effects on ischemic stroke when administered intravenously have not been clarified...
2018: BioMed Research International
https://www.readbyqxmd.com/read/30139371/cell-permeable-hmgb1-binding-heptamer-peptide-ameliorates-neurovascular-complications-associated-with-thrombolytic-therapy-in-rats-with-transient-ischemic-stroke
#10
Miaodan Li, Shumin Chen, Xue Shi, Chenfei Lyu, Yongfang Zhang, Miaoqin Tan, Chen Wang, Nailiang Zang, Xiaoxi Liu, Yafang Hu, Jiangang Shen, Liang Zhou, Yong Gu
BACKGROUND: Blood-brain barrier (BBB) breakdown and inflammatory responses are the major causes of tissue-type plasminogen activator (tPA)-induced hemorrhagic transformation (HT), while high-mobility group box 1 (HMGB1) exacerbates inflammatory damage to BBB during the process of brain ischemia/reperfusion. This study aimed to investigate the change of HMGB1 after thrombolytic therapy and whether blocking HMGB1 could ameliorate the neurovasculature complications secondary to tPA treatment in stroke rats...
August 23, 2018: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/30136691/combination-of-mild-therapeutic-hypothermia-and-adipose-derived-stem-cells-for-ischemic-brain-injury
#11
Kai Zhao, Rui Li, Sheng Bi, Yu Li, Long Liu, Yu-Long Jia, Peng Han, Chang-Cong Gu, Xi-Ze Guo, Wan-Ping Zhang, Chun Wang, Chun-Ying Pei, Lin-Lu Tian, Li-Xian Li
Mild therapeutic hypothermia has been shown to mitigate cerebral ischemia, reduce cerebral edema, and improve the prognosis of patients with cerebral ischemia. Adipose-derived stem cell-based therapy can decrease neuronal death and infiltration of inflammatory cells, exerting a neuroprotective effect. We hypothesized that the combination of mild therapeutic hypothermia and adipose-derived stem cells would be neuroprotective for treatment of stroke. A rat model of transient middle cerebral artery occlusion was established using the nylon monofilament method...
October 2018: Neural Regeneration Research
https://www.readbyqxmd.com/read/30135281/-study-of-the-neuroprotective-effects-of-carnosine-in-an-experimental-model-of-focal-cerebral-ischemia-reperfusion
#12
A A Devyatov, T N Fedorova, S L Stvolinsky, I N Ryzhkov, N A Riger, V A Tutelyan
Oxidative stress is one of the key factors in brain tissue damage in ischemia, which indicates the appropriateness of using antioxidants under these conditions. One of the promising antioxidants for the therapy of ischemic stroke is the natural dipeptide carnosine. The neuroprotective effect of dietary carnosine administration was investigated in an experimental model of focal cerebral ischemia/reperfusion in Wistar rats. Animals received carnosine with a diet at a daily dose of 150 mg/kg for 7 days before temporary occlusion of the middle cerebral artery (MCA), performed for 60 min...
August 2018: Biomedit︠s︡inskai︠a︡ Khimii︠a︡
https://www.readbyqxmd.com/read/30131754/roles-of-specialized-pro-resolving-lipid-mediators-in-cerebral-ischemia-reperfusion-injury
#13
REVIEW
Ping Yin, Yafen Wei, Xu Wang, Mingqin Zhu, Jiachun Feng
Ischemic stroke contributes to ~80% of all stroke cases. Recanalization with thrombolysis or endovascular thrombectomy are currently critical therapeutic strategies for rebuilding the blood supply following ischemic stroke. However, recanalization is often accompanied by cerebral ischemia reperfusion injury that is mediated by oxidative stress and inflammation. Resolution of inflammation belongs to the end stage of inflammation where inflammation is terminated and the repair of damaged tissue is started. Resolution of inflammation is mediated by a group of newly discovered lipid mediators called specialized pro-resolving lipid mediators (SPMs)...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/30126083/repression-of-the-glucocorticoid-receptor-aggravates-acute-ischemic-brain-injuries-in-adult-mice
#14
Yong Li, Lei Huang, Qingyi Ma, Katherine R Concepcion, Minwoo A Song, Peng Zhang, Yingjie Fu, Daliao Xiao, Lubo Zhang
Strokes are one of the leading causes of mortality and chronic morbidity in the world, yet with only limited successful interventions available at present. Our previous studies revealed the potential role of the glucocorticoid receptor (GR) in the pathogenesis of neonatal hypoxic-ischemic encephalopathy (HIE). In the present study, we investigate the effect of GR knockdown on acute ischemic brain injuries in a model of focal cerebral ischemia induced by middle cerebral artery occlusion (MCAO) in adult male CD1 mice...
August 17, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/30120034/the-effects-of-mouse-recombinant-resistin-on-mrna-expression-of-proinflammatory-and-anti-inflammatory-cytokines-and-heat-shock-protein-70-in-experimental-stroke-model
#15
Sedigheh Behrouzifar, Abedin Vakili, Mehdi Barati
BACKGROUND: Our recent research showed that resistin has a neuroprotective effect against stroke-induced injury through suppressing apoptosis and oxidative stress. However, the molecular mechanism of neuroprotection of resistin is unclear. This work was designed to examine the effect of mouse recombinant resistin on mRNA expression of Tumor necrosis factor-α (TNF-α), Interleukin-1β (IL-1β), Interleukin-10 (IL-10), Transforming growth factor-β1 (TGF- β1), and Heat shock protein-70 (HSP-70) in mouse model of stroke...
August 14, 2018: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/30092705/experimental-ischemic-stroke-induces-long-term-t-cell-activation-in-the-brain
#16
Luokun Xie, Wenjun Li, Jessica Hersh, Ran Liu, Shao-Hua Yang
Mounting evidence has demonstrated that both innate and adaptive immune cells infiltrate into the brain after ischemic stroke. T cell invasion has been found in the ischemic region up to one month post experimental ischemic stroke and has been shown to persist for years in stroke patients. However, the function and phenotypic characteristics of the brain invading T cells after ischemic stroke have not been investigated. In the current study, we determined the function of brain invading T cells in the acute and chronic phase following experimental ischemic stroke induced by transient middle cerebral artery occlusion...
August 10, 2018: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/30090976/effects-of-flower-buds-extract-of-tussilago-farfara-on-focal-cerebral-ischemia-in-rats-and-inflammatory-response-in-bv2-microglia
#17
Ji Hye Hwang, Vinoth R Kumar, Seok Yong Kang, Hyo Won Jung, Yong-Ki Park
OBJECTIVE: To investigate the effects of the flower buds extract of Tussilago farfara Linné (Farfarae Flos; FF) on focal cerebral ischemia through regulation of inflammatory responses in activated microglia. METHODS: Brain ischemia was induced in Sprague-Dawley rats by a transient middle cerebral artery occlusion (tMCAO) for 90 min and reperfusion for 24 h. Twenty rats were randomly divided into 4 groups (n=5 per group): normal, tMCAO-induced ischemic control, tMCAO plus FF extract 300 mg/kg-treated, and tMCAO plus MK-801 1 mg/kg-treated as reference drug...
August 8, 2018: Chinese Journal of Integrative Medicine
https://www.readbyqxmd.com/read/30090656/glibenclamide-enhances-the-therapeutic-benefits-of-early-hypothermia-after-severe-stroke-in-rats
#18
Shuzhen Zhu, Xiaoya Gao, Kaibin Huang, Yong Gu, Yafang Hu, Yongming Wu, Zhong Ji, Qing Wang, Suyue Pan
Glibenclamide (GBC) is an antidiabetic drug that is in a class of medications known as sulfonylureas, which play critical roles in attenuating brain edema and reducing mortality in ischemic stroke patients. Therapeutic hypothermia (TH) is another robust neuroprotectant that prevents brain swelling and improves the neurological outcomes of stroke patients. However, whether the combination of GBC and TH can be used as a reliable neuroprotectant in ischemic stroke remains largely unknown. We used the middle cerebral artery occlusion (MCAO) rat model as well as oxygen and glucose deprivation-reoxygenation (OGD/R) endothelial cells as ischemic stroke models to investigate the efficacy and mechanisms of treating ischemic stroke with the combination of GBC and TH...
August 2018: Aging and Disease
https://www.readbyqxmd.com/read/30080219/identification-of-functional-genetic-polymorphisms-at-il-10-promoter-region-and-their-association-with-risk-of-ischemic-stroke-in-chinese-han-population
#19
Y Tong, S Jiang, L Cai, X Guan, S Hou, Z Wang, Q Lu, J Liu
BACKGROUND: Pleiotropic cytokine interleukin-10 (IL-10) has been suggested as modifying risk for atherosclerosis. Promoter region genetic polymorphism of IL-10 gene is known to be associated with the level of IL-10 production. Through these effects, they might be involved with the ischemic stroke (IS). Our aim was to assess the nature of the functional polymorphisms in IL-10 promoter and any links with IS in Chinese Han population. METHODS: The IL-10 -1082 G>A, -819 C>T and -592 C>A functional polymorphisms were determined by TaqMan SNP Genotyping assays in 1296 subjects (648 IS patients diagnosed by CTs or/and magnetic resonance imaging (MRI) and 648 normal healthy controls from Chinese Han Population)...
2018: Journal of Nutrition, Health & Aging
https://www.readbyqxmd.com/read/30076999/neuroprotective-effects-of-dtio-a-novel-analog-of-nec-1-in-acute-and-chronic-stages-after-ischemic-stroke
#20
Wei Li, Jin Liu, Jie-Ru Chen, Yong-Ming Zhu, Xue Gao, Yong Ni, Bo Lin, Huanqiu Li, Shi-Gang Qiao, Chen Wang, Hui-Ling Zhang, Gui-Zhen Ao
Receptor-interacting protein 1 kinase (RIP1K) plays a key role in necroptosis. Necrostatin-1 (Nec-1), a specific inhibitor of RIP1K, provides neuroprotection against ischemic brain injury, associating with inhibition of inflammation. Recently, our group synthesized a novel analog of Nec-1, 5-(3',5'-dimethoxybenzal)-2-thio-imidazole-4-ketone (DTIO). The present study investigated the effect of DTIO on ischemic stroke-induced brain injury in both acute and chronic phase and its underlying mechanism. In vivo, DTIO treatment reduced infarct volume and improved neurological deficits in the acute phase after permanent middle cerebral artery occlusion (pMCAO) and it also attenuated brain atrophy and promoted brain functional recovery in the chronic phase post-cerebral ischemia/reperfusion (I/R)...
August 2, 2018: Neuroscience
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