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https://www.readbyqxmd.com/read/28336435/in%C3%A2-vitro-model-of-cerebral-ischemia-by-using-brain-microvascular-endothelial-cells-derived-from-human-induced-pluripotent-stem-cells
#1
Yasuhiro Kokubu, Tomoko Yamaguchi, Kenji Kawabata
Brain-derived microvascular endothelial cells (BMECs), which play a central role in blood brain barrier (BBB), can be used for the evaluation of drug transport into the brain. Although human BMEC cell lines have already been reported, they lack original properties such as barrier integrity. Pluripotent stem cells (PSCs) can be used for various applications such as regenerative therapy, drug screening, and pathological study. In the recent study, an induction method of BMECs from PSCs has been established, making it possible to more precisely study the in vitro human BBB function...
March 21, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28335684/bone-marrow-derived-endothelial-progenitor-cell-treatment-in-a-model-of-lateral-fluid-percussion-injury-in-rats-evaluation-of-acute-and-subacute-outcome-measures
#2
Eugene Park, Katya J Park, Elaine Liu, Rongcai Jiang, Jian-Ning Zhang, Andrew J Baker
Traumatic brain injury (TBI) continues to be a serious healthcare issue while therapies to treat TBI remain elusive. Promising results from the use of endothelial progenitor cells (EPCs) in numerous disease states highlight the pleiotropic capacity of this cell type. We have previously demonstrated that EPC conditioned media reduces axonal degeneration following in vitro OGD insult and concurrently improves white matter and microvascular outcome in vivo following midline fluid percussion injury. In the current study we evaluated the effectiveness of allogeneic endothelial cells derived from rat bone marrow on microvascular recovery and neuronal sparing following lateral fluid percussion injury...
March 23, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28333770/the-diagnostic-yield-of-upper-and-lower-gastrointestinal-endoscopies-in-children-in-a-tertiary-centre
#3
M Thomson, S Sharma
INTRODUCTION: Endoscopy is integral to the diagnosis and management of many gastrointestinal problems in children. Recently the number of endoscopic procedures performed has increased considerably worldwide raising questions about their appropriateness and cost-efficacy. OBJECTIVES: METHODS:: Random selection of cases from a theatre electronic database from a 30 month period covering April 2012 to October 2014. The data was collected for: initial presenting symptoms; age at diagnosis; indications for endoscopy; endoscopic findings; histopathological findings; and any change in management post-endoscopic procedure...
March 22, 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/28326019/nahs-protects-against-the-impairments-induced-by-oxygen-glucose-deprivation-in-different-ages-of-primary-hippocampal-neurons
#4
Qian Yu, Binrong Wang, Tianzhi Zhao, Xiangnan Zhang, Lei Tao, Jinshan Shi, Xude Sun, Qian Ding
Brain ischemia leads to poor oxygen supply, and is one of the leading causes of brain damage and/or death. Neuroprotective agents are thus in great need for treatment purpose. Using both young and aged primary cultured hippocampal neurons as in vitro models, we investigated the effect of sodium hydrosulfide (NaHS), an exogenous donor of hydrogen sulfide, on oxygen-glucose deprivation (OGD) damaged neurons that mimick focal cerebral ischemia/reperfusion (I/R) induced brain injury. NaHS treatment (250 μM) protected both young and aged hippocampal neurons, as indicated by restoring number of primary dendrites by 43...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28322445/transplantation-of-mesenchymal-stem-cells-overexpressing-il10-attenuates-cardiac-impairments-in-rats-with-myocardial-infarction
#5
Xin Meng, Jianping Li, Ming Yu, Jian Yang, Minjuan Zheng, Jinzhou Zhang, Chao Sun, Hongliang Liang, Liwen Liu
Mesenchymal stem cell (MSC) has been well known to exert therapeutic potential for patients with myocardial infarction (MI). In addition, interleukin-10 (IL10) could attenuate MI through suppressing inflammation. Thus, the combination of MSC implantation with IL10 delivery may extend health benefits to ameliorate cardiac injury after MI. Here we established overexpression of IL10 in bone marrow-derived MSC through adenoviral transduction. Cell viability, apoptosis and IL10 secretion under ischemic challenge in vitro were examined...
March 21, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28320085/down-regulation-of-microrna-142-5p-attenuates-oxygen-glucose-deprivation-and-reoxygenation-induced-neuron-injury-through-up-regulating-nrf2-are-signaling-pathway
#6
Ning Wang, Lingmin Zhang, Yang Lu, Mingxin Zhang, Zhenni Zhang, Kui Wang, Jianrui Lv
MicroRNAs (miRNAs) play vital roles in regulating neuron survival during cerebral ischemia/reperfusion injury. miR-142-5p is reported to be an important regulator of cellular survival. However, little is known about the role of miR-142-5p in regulating neuron survival during cerebral ischemia/reperfusion injury. In this study, we aimed to investigate the precise function and mechanism of miR-142-5p in the regulation of neuron ischemia/reperfusion injury using a cellular model of oxygen-glucose deprivation and reoxygenation (OGD/R)-induced injury in hippocampal neurons in vitro...
March 14, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28320070/dexpramipexole-improves-bioenergetics-and-outcome-in-experimental-stroke
#7
Mirko Muzzi, Elisabetta Gerace, Daniela Buonvicino, Elisabetta Coppi, Francesco Resta, Laura Formentini, Riccardo Zecchi, Laura Tigli, Daniele Guasti, Martina Ferri, Emidio Camaioni, Alessio Masi, Domenico E Pellegrini-Giampietro, Guido Mannaioni, Daniele Bani, Anna M Pugliese, Alberto Chiarugi
BACKGROUND AND PURPOSE: To investigate the effects of dexpramipexole, a drug recently tested in ALS patients able to bind F1Fo ATP synthase and increase mitochondrial ATP production, on experimental ischemic brain injury. EXPERIMENTAL APPROACH: The effects of dexpramipexole on bioenergetics, Ca(2+) fluxes, electrophysiological functions and death were evaluated in primary neural cultures and hippocampal slices exposed to oxygen-glucose deprivation (OGD). The drug's impact on infarct volumes and neurological functions was also evaluated in mice subjected to proximal or distal MCAo...
March 20, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28316021/hemin-protects-against-oxygen-glucose-deprivation-induced-apoptosis-activation-via-neuroglobin-in-sh-sy5y-cells
#8
Yun-Jia Wang, Qian-Yi Peng, Song-Yun Deng, Cai-Xia Chen, Long Wu, Li Huang, Li-Na Zhang
This study aimed to investigate the mechanism underlying the neuroprotective effect of hemin in oxygen-glucose deprivation (OGD)-treated neurons. OGD-treated SH-SY5Y cells (human neuroblastoma cells) were used in the study. The cellular viability of SH-SY5Y cells was assessed by the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay, and the cell apoptosis rate was determined by flow cytometry analysis with Annexin V-fluorescein isothiocyanate and propidium iodide staining with or without hemin pretreatment...
March 18, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28314243/parthenolide-attenuates-cerebral-ischemia-reperfusion-injury-via-akt-gsk-3%C3%AE-pathway-in-pc12-cells
#9
Jun-Feng Zhang, Li Zhang, Li-Li Shi, Zhao-Hua Zhao, Hao Xu, Fei Liang, Hong-Bo Li, Yan Zhao, Xi Xu, Ke Yang, Ying-Fang Tian
Parthenolide (PN), a sesquiterpene lactone isolated from the herbal medicine feverfew (Tanacetum parthenium), was reported to possess neuroprotective activity. However, the neuroprotective effect of PN against cerebral ischemia/reperfusion (I/R) injury remains unclear. Therefore, the aim of the present study was to explore the neuroprotective effects of PN against oxygen-glucose deprivation (OGD)-induced apoptosis in PC12 cells and the underlying mechanisms. Our results demonstrated that PN ameliorated OGD/R-evoked neuronal injury and oxidative stress in PC12 cells...
March 13, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28294336/adenosine-production-by-brain-cells
#10
Edwin K Jackson, Shawn E Kotermanski, Elizabeth V Menshikova, Raghvendra K Dubey, Travis C Jackson, Patrick M Kochanek
The early release of adenosine following traumatic brain injury (TBI) suppresses seizures and brain inflammation; thus, it is important to elucidate the cellular sources of adenosine following injurious stimuli triggered by TBI so that therapeutics for enhancing the early adenosine-release response can be optimized. Using mass spectrometry with (13) C-labelled standards, we investigated in cultured rat neurons, astrocytes, and microglia the effects of oxygen-glucose deprivation (OGD; models energy failure), H2 O2 (produces oxidative stress), and glutamate (induces excitotoxicity) on intracellular and extracellular levels of 5'-AMP (adenosine precursor), adenosine, and inosine and hypoxanthine (adenosine metabolites)...
March 13, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28273662/dedifferentiated-fat-cells-as-a-novel-source-for-cell-therapy-to-target-neonatal-hypoxic-ischemic-encephalopathy
#11
Alkisti Mikrogeorgiou, Yoshiaki Sato, Taiki Kondo, Tetsuo Hattori, Yuichiro Sugiyama, Miharu Ito, Akiko Saito, Keiko Nakanishi, Masahiro Tsuji, Tomohiko Kazama, Koichiro Kano, Taro Matsumoto, Masahiro Hayakawa
Neonatal hypoxic-ischemic (HI) encephalopathy (HIE) remains a major cause of mortality and persistent neurological disabilities in affected individuals. At present, hypothermia is considered to be the only applicable treatment option, although growing evidence suggests that cell-based therapy might achieve better outcomes. Dedifferentiated fat (DFAT) cells are derived from mature adipocytes via a dedifferentiation strategy called ceiling culture. Their abundance and ready availability might make them an ideal therapeutic tool for the treatment of HIE...
March 9, 2017: Developmental Neuroscience
https://www.readbyqxmd.com/read/28260507/tanshinone-iia-protects-hippocampal-neuronal-cells-from-reactive-oxygen-species-through-changes-in-autophagy-and-activation-of-phosphatidylinositol-3-kinase-protein-kinas-b-and-mechanistic-target-of-rapamycin-pathways
#12
Ruodong Han, Guopin Wang, Qiqiang Tang, Yingchun Zhu
BACKGROUND: Tanshinone IIA is a key active ingredient of danshen, which derived from the dried root or rhizome of Salviae miltiorrhizae Bge. The tanshinone IIA has protective effects against focal cerebral ischemic injury. However, the underlying mechanisms remain unclear. METHODS: An in vitro model of cerebral ischemia was established by subjecting cultures of hippocampal neuronal cells to oxygen-glucose deprivation followed by reperfusion (OGD/R). The probes of 5-(and-6)-chloromethyl-2',7'-dichlorodihydrofluorescein diacetate, acetyl ester (CM-H2DCFDA) and 5',6,6'-tetrachloro-1,1',3,3'-tetraethylbenzimidazolylcarbocyanine,iodide (JC-1) were used to determine the mitochondrial membrane potential (MMP) and reactive oxygen species (ROS) production...
March 5, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/28257830/neuroprotective-effects-of-a-novel-peptide-fk18-under-oxygen-glucose-deprivation-in-sh-sy5y-cells-and-retinal-ischemia-in-rats%C3%A2-via%C3%A2-the-akt-pathway
#13
Shuyu Xiong, Yupeng Xu, Mingming Ma, Haiyan Wang, Fang Wei, Qing Gu, Xun Xu
Ischemic neuronal injury is associated with several life- and vision-threatening diseases. Neuroprotection is essential in the treatment of these diseases. Here, we identified and characterized a novel peptide, FK18, from basic fibroblast growth factor (bFGF). We further assessed the neuroprotective effects of this peptide and its potential mechanisms using the in vitro oxygen-glucose deprivation (OGD) model in SH-SY5Y cells and the in vivo retinal ischemia-reperfusion (I/R) injury model to mimic ischemic neuronal injury...
February 28, 2017: Neurochemistry International
https://www.readbyqxmd.com/read/28257582/osthole-prevents-cerebral-ischemia-reperfusion-injury-via-notch-signaling-pathway
#14
Junhong Guan, Xiangtai Wei, Shengtao Qu, Tao Lv, Qiang Fu, Ye Yuan
Stroke is a common cerebrovascular disease in aged population with the second leading mortality and the leading cause of permanent disability, and the ischemic stroke is the primary form. Osthole is a coumarin derivative extracted from the fruits of Cnidium monnieri (Linn.) Cuss. In this study, we established the rat middle cerebral artery occlusion/reperfusion (MCAO/R) model in vivo, and found that MCAO/R caused cerebral infarction, hippocampus neuronal injury and apoptosis, and also activated the Notch 1 signaling pathway...
March 3, 2017: Biochemistry and Cell Biology, Biochimie et Biologie Cellulaire
https://www.readbyqxmd.com/read/28256111/sirt1-dependent-ampk-pathway-in-the-protection-of-estrogen-against-ischemic-brain-injury
#15
Jin-Min Guo, He Shu, Lei Wang, Jian-Jiang Xu, Xue-Cai Niu, Li Zhang
AIMS: Stroke is a major cause of mortality and disability, especially for postmenopausal women. In view of the protective action of estrogen, hormone therapy remains the only effective way to limit this risk. The objective of this study was to investigate the efficiency and underlying mechanisms of estrogen neuroprotection. METHODS: Subcutaneous injection of 17β-estradiol in rats after ovariectomy (OVX) was used to manipulate estrogen level and explore the effects of estrogen in cerebral ischemic damage both in vivo and in vitro...
March 2, 2017: CNS Neuroscience & Therapeutics
https://www.readbyqxmd.com/read/28245468/raf-kinase-inhibitor-protein-attenuates-ischemic-induced-microglia-cell-apoptosis-and-activation-through-nf-%C3%AE%C2%BAb-pathway
#16
Li Su, Rongrong Zhang, Yuanyuan Chen, Zhenyu Zhu, Chao Ma
BACKGROUND: Acute ischemic stroke is one of the most important factors leading to disability and death with the characterization of accumulated neuron death and injured supportive neurovascular structures. Raf-1 kinase inhibitory protein (RKIP) is a key molecule in cell response to survival or death stimuli. However, the role of RKIP in stroke is worthy to be further studied. METHODS: We used lentivirus mediated RKIP knockdown and overexpression to investigate the effect of RKIP on animal models of focal cerebral ischemia...
February 28, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28245071/inhibition-of-microrna-153-protects-neurons-against-ischemia-reperfusion-injury-in-an-oxygen-glucose-deprivation-and-reoxygenation-cellular-model-by-regulating-nrf2-ho-1-signaling
#17
Qiong Ji, Jianbo Gao, Yan Zheng, Xueli Liu, Qiangqiang Zhou, Canxia Shi, Meng Yao, Xia Chen
MicroRNAs are emerging as critical regulators in cerebral ischemia/reperfusion injury; however, their exact roles remain poorly understood. miR-153 is reported to be a neuron-related miRNA involved in neuroprotection. In this study, we aimed to investigate the precise role of miR-153 in regulating neuron survival during cerebral ischemia/reperfusion injury using an oxygen-glucose deprivation and reoxygenation (OGD/R) cellular model. We found that miR-153 was significantly upregulated in neurons subjected to OGD/R treatment...
February 28, 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/28241838/simvastatin-protects-ischemic-spinal-cord-injury-from-cell-death-and-cytotoxicity-through-decreasing-oxidative-stress-in-vitro-primary-cultured-rat-spinal-cord-model-under-oxygen-and-glucose-deprivation-reoxygenation-conditions
#18
Hye-Min Sohn, Jin-Young Hwang, Jung-Hee Ryu, Jinhee Kim, Seongjoo Park, Jin-Woo Park, Sung-Hee Han
BACKGROUND: Ischemia and the following reperfusion damage are critical mechanisms of spinal cord injury. Statins have been reported to decrease ischemia-reperfusion injury in many organs including the spinal cord. Anti-oxidative effect is one of the main protective mechanisms of statin against neuronal death and cytotoxicity. We hypothesized that statins' anti-oxidative property would yield neuroprotective effects on spinal cord ischemia-reperfusion injury METHODS: Primary cultured spinal cord motor neurons were isolated from Sprague-Dawley rat fetuses...
February 27, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28237964/vulnerability-to-oxygen-glucose-deprivation-of-primary-neurons-derived-from-tg2576-alzheimer-mice-role-of-intraneuronal-abeta-accumulation-and-astrocytes
#19
Vito Antonio Baldassarro, Alessandra Marchesini, Luciana Giardino, Laura Calzà
Microvascular dysfunction is considered an integral part of Alzheimer disease (AD) pathogenesis, but the possible relationship between amyloid pathology, microvascular dysfunction and cell death is still unclear. In order to investigate the influence of intraneuronal Abeta (Aβ) accumulation on vulnerability to hypoxia, we isolated primary cortical neurons from Tg2576 (carrying the APPSwe mutation) and Wt fetal mice. We first demonstrated that neurons isolated from Tg2576 new-born mice show an increase in VEGFa mRNA expression and a decrease in the expression of the two VEGF receptors, i...
February 24, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/28230861/ripk3-interactions-with-mlkl-and-camkii-mediate-oligodendrocytes-death-in-the-developing-brain
#20
Yi Qu, Jun Tang, Huiqing Wang, Shiping Li, Fengyan Zhao, Li Zhang, Q Richard Lu, Dezhi Mu
Oligodendrocyte progenitor cells (OPCs) death is a key contributor to cerebral white matter injury (WMI) in the developing brain. A previous study by our group indicated that receptor-interacting proteins (RIPs) are crucial in mediating necroptosis in developing neurons. However, whether this mechanism is involved in OPCs death is unclear. We aimed to explore the mechanisms of RIP-mediated oligodendrocytes (OLs) death in the developing brain. Oligodendrocytes necroptosis was induced by oxygen-glucose deprivation plus caspase inhibitor zVAD treatment (OGD/zVAD) in vitro...
February 23, 2017: Cell Death & Disease
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