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https://www.readbyqxmd.com/read/29784938/characterization-of-the-rat-cerebrospinal-fluid-proteome-following-acute-cerebral-ischemia-using-an-aptamer-based-proteomic-technology
#1
Alba Simats, Teresa García-Berrocoso, Laura Ramiro, Dolors Giralt, Natalia Gill, Anna Penalba, Alejandro Bustamante, Anna Rosell, Joan Montaner
The limited accessibility to the brain has turned the cerebrospinal fluid (CSF) into a valuable source that may contribute to the complete understanding of the stroke pathophysiology. Here we have described the CSF proteome in the hyper-acute phase of cerebral ischemia by performing an aptamer-based proteomic assay (SOMAscan) in CSF samples collected before and 30 min after male Wistar rats had undergone a 90 min Middle Cerebral Artery Occlusion (MCAO) or sham-surgery. Proteomic results indicated that cerebral ischemia acutely increased the CSF levels of 716 proteins, mostly overrepresented in leukocyte chemotaxis and neuronal death processes...
May 21, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29784898/pretreatment-with-simvastatin-upregulates-expression-of-bk-2r-and-cd11b-in-the-ischemic-penumbra-of-rats
#2
Jian-Ying Zhang, Qing-Ke Bai, Ying-Dong Zhang
Inhibitors of 3-hydroxy-3-methylglutaryl coenzyme A reductases, collectively known as statins, have been shown to minimize cerebral ischemic events in patients. We assessed the mechanisms of simvastatin pretreatment in preventing cerebral ischemia/reperfusion injury in rats using a model of middle cerebral artery occlusion (MCAO). Rats were pretreated with simvastatin 14 days prior to MCAO induction. At 3, 24, and 48 hours after reperfusion, bradykinin levels in the ischemic penumbra were assayed by ELISA, mRNA levels of bradykinin B2 receptors (BK-2Rs) and CD11b were measured by fluorescent quantitative real-time PCR (RT-PCR), and co-expression of microglia and BK-2Rs was determined by immunofluorescence...
November 1, 2017: Journal of Biomedical Research
https://www.readbyqxmd.com/read/29777940/curcumin-attenuates-cerebral-ischemia-injury-in-sprague-dawley-rats-and-pc12-cells-by-suppressing-overactivated-autophagy
#3
Yan Zhang, Ming Fang, Yameng Sun, Ting Zhang, Nan Shi, Jinfeng Li, Lei Jin, Kangyong Liu, Jianliang Fu
The present study assessed whether the protective effects of curcumin against cerebral ischemia injury were due to the suppression of overactivated autophagy. Curcumin is a well-known natural polyphenolic compound that effectively counteracts oxidation, inflammation, and various types of cancer. Several studies have demonstrated the protective effects of curcumin against ischemia-reperfusion injury in tissues from the lungs, cardiomyocytes, and liver. The present study employed brain injury models induced by middle cerebral artery occlusion (MCAO) in rats and PC12 oxygen-glucose-deprived (OGD) cells...
May 7, 2018: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29777774/mir-125b-5p-is-involved-in-oxygen-and-glucose-deprivation-injury-in-pc-12-cells-via-cbs-h-2-s-pathway
#4
Yaqi Shen, Zhuqing Shen, Lingyan Guo, Qiuyan Zhang, Zhijun Wang, Lei Miao, Minjun Wang, Jian Wu, Wei Guo, Yizhun Zhu
AIMS: Ischemic stroke is one of the leading causes of death worldwide. MicroRNAs (miRNAs) have been reported to be implicated in cerebral hypoxia injury and could serve as a therapeutic target. As the third gasotransmitter, hydrogen sulfide (H2 S) plays a critical role in hypoxia-induced injury in the central nervous system. Cystathionine β-synthase (CBS) is the main enzyme catalyzing the production of H2 S in brain. The objective of this study was to investigate the effect of miR-125b-5p on protecting against oxygen and glucose deprivation (OGD) injury in PC-12 cells by regulating CBS and H2 S generation...
May 16, 2018: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/29776835/the-combination-of-mannitol-and-temozolomide-increases-the-effectiveness-of-stem-cell-treatment-in-a-chronic-stroke-model
#5
Chunggab Choi, Hye Min Kim, Jeeheun Shon, Jiae Park, Hyeong-Taek Kim, Suk Ho Kang, Seung-Hun Oh, Nam Keun Kim, Ok Joon Kim
BACKGROUND: The blood-brain barrier (BBB) presents a significant challenge to the therapeutic efficacy of stem cells in chronic stroke. Various methods have been developed to increase BBB permeability, but these are associated with adverse effects and are, therefore, not clinically applicable. We recently identified that combination drug treatment of mannitol and temozolomide improved BBB permeability in vitro. Here, we investigated whether this combination could increase the effectiveness of stem cell treatment in an animal model of chronic ischemic stroke...
May 15, 2018: Cytotherapy
https://www.readbyqxmd.com/read/29776451/myeloid-specific-tak1-deletion-results-in-reduced-brain-monocyte-infiltration-and-improved-outcomes-after-stroke
#6
Anjali Chauhan, Jacob Hudobenko, Abdullah Al Mamun, Edward C Koellhoffer, Anthony Patrizz, Rodney M Ritzel, Bhanu P Ganesh, Louise D McCullough
BACKGROUND: Activation of transforming growth factor-β-activated kinase 1 (TAK1) occurs after stroke and leads to an exacerbation of brain injury. TAK1 is involved in innate and adaptive immune responses, but it has divergent inflammatory effects that are dependent on the cell type in which it is activated. There is a robust infiltration of myeloid cells after stroke; however, the contribution of myeloid TAK1 to cerebral ischemia is currently unknown. We hypothesized that myeloid-specific deletion of TAK1 would protect against ischemic brain injury...
May 17, 2018: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29776406/the-effect-of-dpp-4-inhibition-to-improve-functional-outcome-after-stroke-is-mediated-by-the-sdf-1%C3%AE-cxcr4-pathway
#7
Fausto Chiazza, Harald Tammen, Hiranya Pintana, Grazyna Lietzau, Massimo Collino, Thomas Nyström, Thomas Klein, Vladimer Darsalia, Cesare Patrone
BACKGROUND: Dipeptidyl peptidase-4 (DPP-4) inhibitors (gliptins) are approved drugs for the treatment of hyperglycemia in patients with type 2 diabetes. These effects are mainly mediated by inhibiting endogenous glucagon-like peptide-1 (GLP-1) cleavage. Interestingly, gliptins can also improve stroke outcome in rodents independently from GLP1. However, the underlying mechanisms are unknown. Stromal cell-derived factor-1α (SDF-1α) is a DPP-4 substrate and CXCR4 agonist promoting beneficial effects in injured brains...
May 19, 2018: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/29771445/tirofiban-combined-with-rt-pa-intraarterial-thrombolysis-improves-the-recanalization-rate-of-acute-middle-cerebral-artery-occlusion-in-rabbits
#8
Y-J Yu, W Xiong
OBJECTIVE: To investigate the curative effect of tirofiban combined with recombinant tissue-plasminogen activator (rt-PA) selective intra-arterial thrombolysis on acute middle cerebral artery occlusion (MCAO). MATERIALS AND METHODS: A total of 60 adult male Japanese white rabbits weighing 2.5-3.0 kg were selected, and the acute cerebral infarction model was established via autologous thromboembolism of middle cerebral artery. Rabbits were randomly divided into 4 groups: tirofiban group (Ti group, 5 μg/kg, n=15), rt-PA group (rt-PA group, 2 mg/kg, n=15), tirofiban + rt-PA group (Ti + rt-PA group, 3 μg/kg Ti + 1 mg/kg rt-PA, n=15), and control group (Co group, n=15)...
May 2018: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29770336/epigallocatechin-3-gallate-reduces-neuronal-apoptosis-in-rats-after-middle-cerebral-artery-occlusion-injury-via-pi3k-akt-enos-signaling-pathway
#9
Wang Nan, Xu Zhonghang, Chen Keyan, Liu Tongtong, Guo Wanshu, Xu Zhongxin
Background/Aims: Epigallocatechin-3-gallate (EGCG) has neuroprotective effects and the ability to resist amyloidosis. This study observed the protective effect of EGCG against neuronal injury in rat models of middle cerebral artery occlusion (MCAO) and investigated the mechanism of action of PI3K/AKT/eNOS signaling pathway. Methods: Rat models of permanent MCAO were established using the suture method. Rat behavior was measured using neurological deficit score. Pathology and apoptosis were measured using HE staining and TUNEL...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29770189/hydrogen-inhalation-improves-mouse-neurological-outcomes-after-cerebral-ischemia-reperfusion-independent-of-anti-necroptosis
#10
Jun-Long Huang, Wen-Wu Liu, Xue-Jun Sun
This study aimed to investigate the role of necroptosis in the neuroprotection of hydrogen in a mouse model of cerebral ischemia/reperfusion (I/R) injury. C57BL mice were randomly divided into sham group, I/R group, hydrogen/oxygen group (HO), nitrogen/oxygen group (NO). Middle cerebral artery occlusion (MCAO) for 1 hour followed by reperfusion was introduced to animals which were allowed to inhale 66.7% hydrogen/33.3% oxygen for 90 minutes since the beginning of reperfusion. Mice in NO group inhaled 66.7% nitrogen/33...
January 2018: Medical Gas Research
https://www.readbyqxmd.com/read/29767275/aldh2-protects-against-ischemic-stroke-in-rats-by-facilitating-4-hne-clearance-and-aqp4-down-regulation
#11
Yan Li, Si-Liang Liu, Si-Hua Qi
Aldehyde dehydrogenase 2 (ALDH2) is a new therapeutic target in the central nervous system. However, the association between ALDH2 and brain edema following ischemic stroke (IS) remains unclear. The present study was investigated to whether active ALDH2 can attenuate brain edema by using a rat model of IS, with the aim of clarifying the underlying mechanisms involved. Rats were administered the ALDH2 agonist Alda-1, vehicle or the ALDH2 inhibitor cyanamide (CYA) 15 min prior to a 1.5 h middle cerebral artery occlusion (MCAO) surgery...
May 16, 2018: Neurochemical Research
https://www.readbyqxmd.com/read/29766794/chitosan-coated-c-phycocyanin-liposome-for-extending-the-neuroprotective-time-window-against-ischemic-brain-stroke
#12
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/29765488/-morinda-citrifolia-l-leaf-extract-protects-against-cerebral-ischemia-and-osteoporosis-in-an-in-vivo-experimental-model-of-menopause
#13
Jintanaporn Wattanathorn, Cholathip Thipkaew, Wipawee Thukham-Mee, Supaporn Muchimapura, Panakaporn Wannanon, Terdthai Tong-Un
We aimed to determine the protective effects against cerebral ischemia and osteoporosis of Morinda citrifolia extract in experimental menopause. The neuroprotective effect was assessed by giving M. citrifolia leaf extract at doses of 2, 10, and 50 mg/kg BW to the bilateral ovariectomized (OVX) rats for 7 days. Then, they were occluded in the right middle cerebral artery (MCAO) for 90 minutes. The neurological score, brain infarction volume, oxidative stress status, and ERK1/2 and eNOS activities were assessed 24 hours later...
2018: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29765415/human-recombinant-peptide-sponge-enables-novel-less-invasive-cell-therapy-for-ischemic-stroke
#14
Michiyuki Miyamoto, Kentaro Nakamura, Hideo Shichinohe, Tomohiro Yamauchi, Masaki Ito, Hisayasu Saito, Masahito Kawabori, Toshiya Osanai, Tasuku Sasaki, Kiyohiro Houkin, Satoshi Kuroda
Bone marrow stromal cell (BMSC) transplantation has the therapeutic potential for ischemic stroke. However, it is unclear which delivery routes would yield both safety and maximal therapeutic benefits. We assessed whether a novel recombinant peptide (RCP) sponge, that resembles human collagen, could act as a less invasive and beneficial scaffold in cell therapy for ischemic stroke. BMSCs from green fluorescent protein-transgenic rats were cultured and Sprague-Dawley rats were subjected to permanent middle cerebral artery occlusion (MCAo)...
2018: Stem Cells International
https://www.readbyqxmd.com/read/29763638/effects-of-sc99-on-cerebral-ischemia-perfusion-injury-in-rats-selective-modulation-of-microglia-polarization-to-m2-phenotype-via-inhibiting-jak2-stat3-pathway
#15
Yiping Ding, Jinhong Qian, Haiying Li, Haitao Shen, Xiang Li, Yan Kong, Zhuan Xu, Gang Chen
Inhibition of Janus kinases 2-Signal transducers and activators of transcription3 (JAK2-STAT3) pathway has been shown to exert anti-inflammatory actions. SC99, a novel specific inhibitor targeting JAK2-STAT3 pathway, has been verified to negatively modulate platelet activation and aggregation in vitro. In current study, a middle cerebral artery occlusion and reperfusion (MCAO/R) model was established in Sprague Dawley rats and primary cultured microglia was exposed to oxygen and glucose deprivation (OGD/R) in vitro...
May 12, 2018: Neuroscience Research
https://www.readbyqxmd.com/read/29762050/dl-3-n-butylphthalide-attenuates-ischemic-reperfusion-injury-by-improving-the-function-of-cerebral-artery-and-circulation
#16
Chuan Qin, Panting Zhou, Liping Wang, Muyassar Mamtilahun, Wanlu Li, Zhijun Zhang, Guo-Yuan Yang, Yongting Wang
Dl-3-N-butylphthalide (NBP) is approved in China for the treatment of ischemic stroke. Previous studies have shown that NBP promotes recovery after stroke via multiple mechanisms. However, the effect of NBP on vascular function and thrombosis remains unclear. Here, we aim to study the effect of NBP on vascular function using a rat model of transient middle cerebral artery occlusion (MCAO) and a state-of-the-art high-resolution synchrotron radiation angiography. Eighty SD rats underwent MCAO surgery. NBP (90 mg/kg) was administrated daily by gavage...
January 1, 2018: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/29761021/human-inpc-therapy-leads-to-improvement-in-functional-neurologic-outcomes-in-a-pig-ischemic-stroke-model
#17
Vivian W Lau, Simon R Platt, Harrison E Grace, Emily W Baker, Franklin D West
Introduction: Stroke is the leading cause of disability in the United States but current therapies are limited with no regenerative potential. Previous translational failures have highlighted the need for large animal models of ischemic stroke and for improved assessments of functional outcomes. The aims of this study were first, to create a post-stroke functional outcome assessment scale in a porcine model of middle cerebral artery occlusion (MCAO) and second, to use this scale to determine the effect of human-induced-pluripotent-cell-derived neural progenitor cells (iNPCs) on functional outcome in this large animal stroke model...
May 2018: Brain and Behavior
https://www.readbyqxmd.com/read/29760990/spatial-and-temporal-identification-of-cerebral-infarctions-based-on-multiphoton-microscopic-imaging
#18
Shu Wang, Huiping Du, Bingbing Lin, Chenxi Liao, Xiaoqin Zhu, Xingfu Wang, Hong Chen, Shuangmu Zhuo, Liwei Jiang, Lianhuang Li, Haohua Tu, Jianxin Chen
Ischemic stroke is a leading cause of death and permanent disability worldwide. Middle cerebral artery occlusion (MCAO) of variable duration times could be anticipated to result in varying degrees of injury that evolve spatially over time. Therefore, investigations following strokes require information concerning the spatiotemporal dimensions of the ischemic core as well as of perilesional areas. In the present study, multiphoton microscopy (MPM) based on two-photon excited fluorescence (TPEF) and second harmonic generation (SHG) was applied to image such pathophysiological events...
May 1, 2018: Biomedical Optics Express
https://www.readbyqxmd.com/read/29760720/the-long-term-outcome-comparison-of-different-time-delayed-kallikrein-treatments-in-a-mouse-cerebral-ischemic-model
#19
Yaohui Ni, Kefu Cai, Yujie Hu, Chuan-Hui Wang, Yuanyuan Zhang, Hua Huang, Xing Su, Jin-Hua Gu
Delayed administration of kallikrein after cerebral infarction can improve neurological function. However, the appropriate kallkrein treatment time after ischemic stroke has not been illuminated. In this study, we compared the long-term outcome among three kallikrein therapeutic regimens starting at different time points following mouse cerebral ischemia. Furthermore, the protective mechanisms involving neurogenesis, angiogenesis, and AKT-GSK3 β -VEGF signaling pathway were analyzed. Human tissue kallikrein was injected through the tail vein daily starting at 8 h, 24 h, or 36 h after right middle cerebral artery occlusion (MCAO) until the 28th day...
2018: Stem Cells International
https://www.readbyqxmd.com/read/29758953/electroacupunture-contributes-to-recovery-of-neurological-deficits-in-experimental-stroke-by-activating-astrocytes
#20
Haijun Zhao, Yan Lu, Yuan Wang, Xiaochun Han, Yanan Zhang, Bingbing Han, Tong Wang, Yan Li, Shijun Wang
BACKGROUND: Neurological deficits is one of the most prevalent clinical manifestation after stroke. The effects of astrocytes activated by electroacupunture (EA) after stroke on the neurological recovery in middle cerebral artery occlusion (MCAO) rats was not clear and definite. OBJECTIVE: Our previous study showed that treatment with EA for 7 days contributed to the activation of astrocytes in MCAO rats. The purposes of this study were to 1) confirm the effects of EA for 14 days on activation of astrocytes in MCAO rats, and 2) test the relationships between activation of astrocytes and neurological functional recovery induced by EA in MCAO rats...
May 6, 2018: Restorative Neurology and Neuroscience
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