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Ischemic Stroke cytokine

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https://www.readbyqxmd.com/read/29777902/chemical-characterization-and-cerebroprotective-effect-of-methanolic-root-extract-of-colebrookea-oppositifolia-in-rats
#1
Gollapalle Lakshminarayanashastry Viswanatha, Marikunte V Venkataranganna, Nunna Bheema Lingeswara Prasad, Shylaja Hanumanthappa
ETHNOPHARMACOLOGICAL RELEVANCE: Colebrookea oppositifolia Smith is one of the extensively used plants to treat neurological conditions such as epilepsy by the various ethnic communities in sub-Himalayan regions of India such as Bhoxa, Tharu and nomadic Gujjars. AIM OF THE STUDY: This study was conducted to evaluate the cerebroprotective effect of C. oppositifolia methanolic root (MeCO) extract in Wistar rats. MATERIALS AND METHODS: The MeCO was characterized for total phenolic content and later subjected for detailed liquid chromatography-mass spectrometry analysis...
May 16, 2018: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29774769/serum-mediated-activation-of-bone-marrow-derived-mesenchymal-stem-cells-in-ischemic-stroke-patients-a-novel-preconditioning-method
#2
Gyeong Joon Moon, Yeon Hee Cho, Dong Hee Kim, Ji Hee Sung, Jeong Pyo Son, Sooyoon Kim, Jae Min Cha, Oh Young Bang
Stroke induces complex and dynamic, local and systemic changes including inflammatory reactions, immune responses, and repair and recovery processes. Mesenchymal stem cells (MSCs) have been shown to enhance neurological recovery after stroke. We hypothesized that serum factors play a critical role in the activation of bone marrow (BM) MSCs after stroke such as by increasing proliferation, paracrine effects, and rejuvenation. Human MSCs (hMSCs) were grown in fetal bovine serum (FBS), normal healthy control serum (NS), or stroke patient serum (SS)...
January 1, 2018: Cell Transplantation
https://www.readbyqxmd.com/read/29772377/impact-of-steroid-hormones-e2-and-p-on-the-nlrp3-asc-casp1-axis-in-primary-mouse-astroglia-and-bv-2-cells-after-in-vitro-hypoxia
#3
Alexander Slowik, Leoni Lammerding, Adib Zendedel, Pardes Habib, Cordian Beyer
Clinical and animal model studies have demonstrated the neuroprotective and anti-inflammatory effects of 17beta-estradiol (E2) and progesterone (P) in different disease models of the central nervous system (CNS) including ischemic stroke. Inflammasomes are involved in the interleukin-1 beta (IL1beta) maturation, in particular, NLRP3, the adaptor protein apoptosis-associated speck-like protein containing a CARD (ASC) and the active caspase-1 (Casp1) form. Recently, we showed that administration of E2 or P selectively regulated these components after experimental ischemic stroke in rats...
May 14, 2018: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29766794/chitosan-coated-c-phycocyanin-liposome-for-extending-the-neuroprotective-time-window-against-ischemic-brain-stroke
#4
Goo Yong Chung, Kyou Hee Shim, Hye Jin Kim, Seul Ki Min, Hwa Sung Shin
The time window for neuroprotection during ischemic brain stroke is short, and hence, development of neuroprotectants is a critical to extend this time window. This study sought to verify if muco-adhesive chitosan coating improves the neuroprotective potential of the pre-proven C-Phycocyanin-pertaining liposome (C-Pc liposome). The use of chitosan-coated liposomes extended the neuroprotective time window by 6 h after reperfusion, and further improved the neuroprotection efficiency of the C-Pc liposome in a rat middle cerebral artery occlusion (MCAO) model...
May 15, 2018: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/29759141/elevated-plasma-macrophage-migration-inhibitor-factor-as-a-risk-factor-for-the-development-of-post-stroke-depression-in-ischemic-stroke
#5
Tingting Xu, Shuang Pu, Ying Ni, Mingqing Gao, Xuemei Li, Xianwei Zeng
BACKGROUND: Macrophage migration inhibitory factor (MIF), a central cytokine of the innate immunity and inflammatory responses, has been reported to link to the pathophysiology of cardiovascular disease and depression. The aim of this study was to test the possible association between plasma MIF and the development of post-stroke depression (PSD) in Chinese patients with acute ischemic stroke (AIS). METHODS: The first-ever AIS patients who were hospitalized at Affiliated Hospital of Weifang Medical College during the period from November 2015 to September 2017 were included...
July 15, 2018: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/29756681/neuronal-il-4r%C3%AE-modulates-neuronal-apoptosis-and-cell-viability-during-the-acute-phases-of-cerebral-ischemia
#6
Han Kyu Lee, Sehwon Koh, Donald C Lo, Douglas A Marchuk
Ischemic stroke caused by an embolus or local thrombosis results in neural tissue damage (an infarct) in the territory of the occluded cerebral artery. Decades of studies have increased our understanding of the molecular events during cerebral infarction; however, translation of these discoveries to druggable targets for ischemic stroke treatment has been largely disappointing. Interleukin-4 (IL-4) is a multifunctional cytokine that exerts its cellular activities via the interleukin-4 receptor α (IL-4Rα)...
May 14, 2018: FEBS Journal
https://www.readbyqxmd.com/read/29749459/ctrp9-ameliorates-cellular-senescence-via-pgc%C3%A2-1%C3%AE-ampk-signaling-in-mesenchymal-stem-cells
#7
Qun Li, Zhangzhang Zhu, Chengde Wang, Lin Cai, Jianglong Lu, Yongchun Wang, Jiadong Xu, Zhipeng Su, Weiming Zheng, Xianbin Chen
Stroke is the second most common cause of death worldwide, and thus, it imposes great financial burdens on both individuals and society. Mesenchymal stem cell (MSC) therapy is a promising approach for ischemic brain injury. However, MSC treatment potential is progressively reduced with age, limiting their therapeutic efficacy for brain repair post‑stroke. C1q and tumor necrosis factor‑related protein 9 (CTRP9) is a novel cytoprotective cytokine with antioxidant effects, which is highly expressed in brain tissue...
May 9, 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29748423/role-of-myeloid-lineage-cell-autophagy-in-ischemic-brain-injury
#8
Masakazu Kotoda, Hajime Furukawa, Takeshi Miyamoto, Masaaki Korai, Fumiaki Shikata, Atsushi Kuwabara, Xiaoxing Xiong, Caleb Rutledge, Rona G Giffard, Tomoki Hashimoto
BACKGROUND AND PURPOSE: Inflammatory cells play a significant role in secondary injury after ischemic stroke. Recent studies have suggested that a lack of autophagy in myeloid cells causes augmented proinflammatory cytokine release and prolonged inflammation after tissue injury. In this study, we investigated the roles of myeloid cell autophagy in ischemic brain injury. METHODS: Focal cerebral ischemia was induced via transient middle cerebral artery occlusion in mice with autophagy-deficient myeloid lineage cells (Atg5flox/flox LysMCre+) and in their littermate controls (Atg5flox/flox)...
May 10, 2018: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/29733457/age-related-changes-in-the-gut-microbiota-influence-systemic-inflammation-and-stroke-outcome
#9
Monica S Spychala, Venugopal Reddy Venna, Michal Jandzinski, Sarah J Doran, David J Durgan, Bhanu Priya Ganesh, Nadim J Ajami, Nagireddy Putluri, Joerg Graf, Robert M Bryan, Louise D McCullough
Objective Chronic systemic inflammation contributes to the pathogenesis of many age-related diseases. Although not well understood, alterations in the gut microbiota, or dysbiosis, may be responsible for age-related inflammation. Methods Using stroke as a disease model, we tested the hypothesis that a youthful microbiota, when established in aged mice, produces positive outcomes following ischemic stroke. Conversely, an aged microbiota, when established in young mice, produces negative outcomes after stroke...
May 7, 2018: Annals of Neurology
https://www.readbyqxmd.com/read/29724240/mesenchymal-stem-cells-attenuate-blood-brain-barrier-leakage-after-cerebral-ischemia-in-mice
#10
Zhuo Cheng, Liping Wang, Meijie Qu, Huaibin Liang, Wanlu Li, Yongfang Li, Lidong Deng, Zhijun Zhang, Guo-Yuan Yang
BACKGROUND: Ischemic stroke induced matrixmetallo-proteinase-9 (MMP-9) upregulation, which increased blood-brain barrier permeability. Studies demonstrated that mesenchymal stem cell therapy protected blood-brain barrier disruption from several cerebrovascular diseases. However, the underlying mechanism was largely unknown. We therefore hypothesized that mesenchymal stem cells reduced blood-brain barrier destruction by inhibiting matrixmetallo-proteinase-9 and it was related to intercellular adhesion molecule-1 (ICAM-1)...
May 3, 2018: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29719282/intravenously-delivered-allogeneic-mesenchymal-stem-cells-bidirectionally-regulate-inflammation-and-induce-neurotrophic-effects-in-distal-middle-cerebral-artery-occlusion-rats-within-the-first-7-days-after-stroke
#11
XiaoBo Li, Min Huang, RenChao Zhao, ChunSong Zhao, Yao Liu, HaiQiang Zou, Ling Chen, YunQian Guan, Y Alex Zhang
BACKGROUND/AIMS: Neurotrophic effects and immunosuppression are the main therapeutic mechanisms of mesenchymal stem cells (MSCs) in stroke treatment. Neurotrophins are produced by graft cells, host neurons, astrocytes, and even microglia/macrophages. Meanwhile, MSCs can increase inflammation if they are not sufficiently induced by pro-inflammatory cytokines. We examined whether intravenously transplanted bone marrow MSCs (BM-MSCs) increase inflammation in distal middle cerebral artery occlusion (dMCAO) rats, how long the increased inflammation effect persists for, and what the final therapeutic outcomes will be...
April 26, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29710856/nicotine-alters-estrogen-receptor-beta-regulated-inflammasome-activity-and-exacerbates-ischemic-brain-damage-in-female-rats
#12
Nathan D d'Adesky, Juan Pablo de Rivero Vaccari, Pallab Bhattacharya, Marc Schatz, Miguel A Perez-Pinzon, Helen M Bramlett, Ami P Raval
Smoking is a preventable risk factor for stroke and smoking-derived nicotine exacerbates post-ischemic damage via inhibition of estrogen receptor beta (ER-β) signaling in the brain of female rats. ER-β regulates inflammasome activation in the brain. Therefore, we hypothesized that chronic nicotine exposure activates the inflammasome in the brain, thus exacerbating ischemic brain damage in female rats. To test this hypothesis, adult female Sprague-Dawley rats (6⁻7 months old) were exposed to nicotine (4...
April 30, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29710456/vitexin-reverses-the-autophagy-dysfunction-to-attenuate-mcao-induced-cerebral-ischemic-stroke-via-mtor-ulk1-pathway
#13
Jin Jiang, Jingcun Dai, Hong Cui
Stroke, as a kind of acute cerebrovascular diseases, has greatly influenced the patients' quality of life and left a huge public health burden. Vitexin is a flavone C-glycoside (apigenin-8-C-?-D-glucopyranoside) present in several medicinal and other plants. This study aims to explore the role of vitexin in middle cerebral artery occlusion (MCAO)-induced cerebral ischemic stroke. The results showed that the MCAO-induced brain infarction was obviously decreased by vitexin. And the abnormal protein levels of Caspase-3, Bcl-2-associated X protein (Bax), antigen identified by monoclonal antibody (Ki-67) and B cell lymphoma 2 (Bcl-2) in MCAO model rats were reversed by vitexin...
March 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29709770/regulatory-t-cells-increase-after-treatment-with-poly-adp-ribose-polymerase-1-inhibitor-in-ischemic-stroke-patients
#14
Min-Young Noh, Won Moo Lee, Su-Jung Lee, Hyun Young Kim, Seung Hyun Kim, Young Seo Kim
BACKGROUND: Regulatory T cells (Tregs) are thought to play a modulatory role in immune responses and to improve outcomes after ischemic stroke. Thus, various strategies for increasing Tregs in animal models of ischemic stroke have yielded successful results. The aim of this study was to examine the potential effect of poly (ADP-ribose) polymerase-1 (PARP-1) inhibitor on Treg proportion in stroke patients. METHODS: Peripheral blood samples were collected from 12 ischemic stroke patients (within 72 h of stroke onset) and 5 healthy control subjects...
April 27, 2018: International Immunopharmacology
https://www.readbyqxmd.com/read/29697202/increased-soluble-cd137-levels-and-cd4-t-cell-associated-expression-of-cd137-in-acute-atherothrombotic-stroke
#15
Yang He, Dong-Hui Ao, Xiao-Qing Li, Shan-Shan Zhong, Rong A, Yang-Yang Wang, Ya-Juan Xiang, Bao-Lei Xu, Ting-Ting Yang, Xu-Guang Gao, Guang-Zhi Liu
As a proinflammatory cytokine, CD137 (4-1BB, TNFRSF9) is present in membrane-bound and soluble forms. Increased expression of CD137 was recently found in T cells in human atherosclerotic plaques. However, the exact role of CD137 in ischemic stroke is not clear. In this study we analyzed the protein levels of soluble CD137 (sCD137) and the expression of CD137 on CD4+ T cells in the peripheral blood of patients with acute atherothrombotic stroke by using the cytometry beads array (CBA) and flow cytometry. Within 24 hours of onset, the stroke patients showed elevated levels of sCD137 (2...
April 26, 2018: Clinical and Translational Science
https://www.readbyqxmd.com/read/29692197/inflammatory-responses-are-sex-specific-in-chronic-hypoxic-ischemic-encephalopathy
#16
Abdullah Al Mamun, Haifu Yu, Sharmeen Romana, Fudong Liu
Neonatal hypoxic-ischemic encephalopathy (HIE) is increasingly recognized as a sexually dimorphic disease. Male infants are not only more vulnerable to ischemic insult; they also suffer more long-term cognitive deficits compared with females with comparable brain damage. The innate immune response plays a fundamental role in mediating acute neonatal HIE injury. However, the mechanism underlying the sex difference in chronic HIE is still elusive. The present study investigated the sex difference in HIE outcomes and inflammatory response in the chronic stage (30 days after HIE)...
January 1, 2018: Cell Transplantation
https://www.readbyqxmd.com/read/29684474/environmental-enrichment-cognitive-neuroprotection-in-an-experimental-model-of-cerebral-ischemia-biochemical-and-molecular-aspects
#17
Lara Vezula Gonçalves, Alice Laschuk Herlinger, Tamara Andrea Alarcon Ferreira, Juliana Barbosa Coitinho, Rita Gomes Wanderley Pires, Cristina Martins-Silva
Stroke is considered a major cause of global morbidity. Currently, there are no effective treatments for post-stroke cognitive impairment. Enriched environment (EE) has been brought forward as a preconditioning method to induce cerebral tolerance in an ischemic event. However, the subjacent mechanisms involved in this tolerance are not yet clear. Herein we aimed to identify the mechanisms of neuroprotection triggered by EE preconditioning in a murine model of ischemic stroke. In order to do so, C57Bl/6 mice were kept for five weeks either in EE or in standard environment (SC) prior to ischemic injury through bilateral carotid occlusion (BCCAo) or sham surgery...
April 20, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29669581/reduced-ex-vivo-release-of-pro-inflammatory-cytokines-and-elevated-plasma-interleukin-6-are-inflammatory-signatures-of-post-stroke-delirium
#18
Katarzyna Kowalska, Elzbieta Klimiec, Kazimierz Weglarczyk, Joanna Pera, Agnieszka Slowik, Maciej Siedlar, Tomasz Dziedzic
BACKGROUND: Experimental studies suggest that systemic inflammation contributes to the pathophysiology of delirium. The aim of our study was to determine blood-derived inflammatory signatures of post-stroke delirium. METHODS: We included 144 ischemic stroke patients. We assessed delirium on a daily basis during the first 7 days of hospitalization. Venous blood was collected at day 3 after the onset of stroke and stimulated ex vivo with lipopolysaccharide (LPS)...
April 18, 2018: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29610037/cytokine-response-tract-specific-fractional-anisotropy-and-brain-morphometry-in-post-stroke-cognitive-impairment
#19
Aleksey Kulesh, Viktor Drobakha, Elena Kuklina, Irina Nekrasova, Vladimir Shestakov
BACKGROUND: Post-stroke cognitive impairment is a clinically heterogeneous condition and its types have a different course and prognosis. The aim of the present study is to address the roles of inflammation, white matter pathology, and brain atrophy in different neuropsychological types of cognitive impairment in the acute period of ischemic stroke. METHODS: In 92 patients, we performed an assessment of the cognitive status and measured concentrations of cytokines (interleukin [IL]-1β, IL-6, tumor necrosis factor-alpha, IL-10) in liquor and serum, as well as a number of magnetic resonance imaging (MRI) morphometric parameters and fractional anisotropy...
March 30, 2018: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/29603201/pr-957-mediates-neuroprotection-by-inhibiting-th17-differentiation-and-modulating-cytokine-production-in-a-mouse-model-of-ischemic-stroke
#20
Ying Guo, Xiuju Chen, Daojing Li, Haijie Liu, Yanan Ding, Ranran Han, Yanchao Shi, Xiaofeng Ma
Acute ischemic stroke can induce secondary brain injury by activating an inflammatory response that contributes to clinical impairment. As a specific inhibitor of the immunoproteasome subunit low molecular weight polypeptide 7 (LMP7), PR-957 may participate in regulating pathophysiologic and inflammatory responses in multiple diseases of the CNS. We investigated the neuroprotective properties of PR-957 in a mouse model of stroke, induced by middle cerebral artery occlusion (MCAO). After MCAO and injections of PR-957 or vehicle, we evaluated mice behaviorally using modified Neurological Severity Scores (mNSS) and sensorimotor tests, including the adhesive-removal test, a foot-fault test, and an inclined plane test...
March 30, 2018: Clinical and Experimental Immunology
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