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https://www.readbyqxmd.com/read/27874947/the-relationship-between-the-occurrence-of-intractable-epilepsy-with-glial-cells-and-myelin-sheath-an-experimental-study
#1
X Hu, J-Y Wang, R Gu, H Qu, M Li, L Chen, R Liu, P Yuan
OBJECTIVE: The occurrence of epilepsy is associated with myelin sheath injury; oligodendrocyte (OL) is the main cell of myelin sheath; In this study, we observed the changes of OL, demyelination, and myelin associated protein in different stages of intractable epilepsy (IE) at the epileptic foci of patients, and provide useful information for the pathophysiology of IE. PATIENTS AND METHODS: IE patients who received epileptogenic focus resection were recruited as the experimental group, their medical records were collected and postoperative follow-up was performed...
November 2016: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/27867470/effect-of-sevoflurane-anesthesia-on-the-comprehensive-mrna-expression-profile-of-the-mouse-hippocampus
#2
Tomo Hayase, Shunsuke Tachibana, Michiaki Yamakage
Postoperative nausea and vomiting (PONV) is a common complication after general anesthesia. Recent studies suggested that the hippocampus is involved in PONV. Hypothesising that hippocampal dopaminergic neurons are related to PONV, we examined the comprehensive mRNA profile of the hippocampus, using a sevoflurane-treated mouse model to confirm this. This study was conducted after approval from our institutional animal ethics committee, the Animal Research Center of Sapporo Medical University School of Medicine (project number: 12-033)...
April 2016: Medical Gas Research
https://www.readbyqxmd.com/read/27798181/nogo-receptor-1-confines-a-disinhibitory-microcircuit-to-the-critical-period-in-visual-cortex
#3
Céleste-Élise Stephany, Taruna Ikrar, Collins Nguyen, Xiangmin Xu, Aaron W McGee
: A characteristic of the developing mammalian visual system is a brief interval of plasticity, termed the "critical period," when the circuitry of primary visual cortex is most sensitive to perturbation of visual experience. Depriving one eye of vision (monocular deprivation [MD]) during the critical period alters ocular dominance (OD) by shifting the responsiveness of neurons in visual cortex to favor the nondeprived eye. A disinhibitory microcircuit involving parvalbumin-expressing (PV) interneurons initiates this OD plasticity...
October 26, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27761788/overexpression-of-tau-rescues-nogo-66-induced-neurite-outgrowth-inhibition-in-vitro
#4
Yu-Chao Zuo, Hong-Lian Li, Nan-Xiang Xiong, Jian-Ying Shen, Yi-Zhi Huang, Peng Fu, Hong-Yang Zhao
Nogo-66 plays a central role in the myelin-mediated inhibition of neurite outgrowth. Tau is a microtubule-associated protein involved in microtubule assembly and stabilization. It remains unverified whether tau interacts directly with growth factor receptors, or engages in cross-talk with regeneration inhibitors like Nogo-66. Here, we report that plasmid overexpression of tau significantly elevated the protein levels of total tau, phosphorylated tau, and microtubule-affinity regulating kinase (MARK). Nogo-66 transiently elevated the total tau protein level and persistently reduced the level of p-S262 tau (tau phosphorylated at serine 262), whereas it had little influence on the level of p-T205 tau (tau phosphorylated at threonine 205)...
December 2016: Neuroscience Bulletin
https://www.readbyqxmd.com/read/27751227/-neuroprotective-effect-of-nogo-66-receptor-silencing-in-preterm-rats-with-brain-injury-caused-by-intrauterine-infection
#5
Shi-Fa Zhang, Yan Zhou, Kai-Jing Zhang, Jia-Jie Luan, Shi-Mei Qi
OBJECTIVE: To investigate the effect of Nogo-66 receptor (NgR) silencing with specific small interfering RNA (siRNA) on brain injury repair in preterm rats with brain injury caused by intrauterine infection and related mechanism of action. METHODS: The pregnant Sprague-Dawley rats (with a gestational age of 15 days) were selected, and premature delivery was induced by RU486 or lipopolysaccharide (LPS). The preterm rats delivered by those treated with RU486 were selected as the control group...
October 2016: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/27728768/in-depth-cerebrospinal-fluid-quantitative-proteome-and-deglycoproteome-analysis-presenting-a-comprehensive-picture-of-pathways-and-processes-affected-by-multiple-sclerosis
#6
Ann Cathrine Kroksveen, Astrid Guldbrandsen, Marc Vaudel, Ragnhild Reehorst Lereim, Harald Barsnes, Kjell-Morten Myhr, Øyvind Torkildsen, Frode S Berven
In the current study, we conducted a quantitative in-depth proteome and deglycoproteome analysis of cerebrospinal fluid (CSF) from relapsing-remitting multiple sclerosis (RRMS) and neurological controls using mass spectrometry and pathway analysis. More than 2000 proteins and 1700 deglycopeptides were quantified, with 484 proteins and 180 deglycopeptides significantly changed between pools of RRMS and pools of controls. Approximately 300 of the significantly changed proteins were assigned to various biological processes, including inflammation, extracellular matrix organization, cell adhesion, immune response and neuron development...
October 11, 2016: Journal of Proteome Research
https://www.readbyqxmd.com/read/27724971/nogo-receptor-complex-expression-dynamics-in-the-inflammatory-foci-of-central-nervous-system-experimental-autoimmune-demyelination
#7
Paschalis Theotokis, Olga Touloumi, Roza Lagoudaki, Evangelia Nousiopoulou, Evangelia Kesidou, Spyridon Siafis, Theodoros Tselios, Athanasios Lourbopoulos, Dimitrios Karacostas, Nikolaos Grigoriadis, Constantina Simeonidou
BACKGROUND: Nogo-A and its putative receptor NgR are considered to be among the inhibitors of axonal regeneration in the CNS. However, few studies so far have addressed the issue of local NgR complex multilateral localization within inflammation in an MS mouse model of autoimmune demyelination. METHODS: Chronic experimental autoimmune encephalomyelitis (EAE) was induced in C57BL/6 mice. Analyses were performed on acute (days 18-22) and chronic (day 50) time points and compared to controls...
October 11, 2016: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/27616630/nogo-a-does-not-inhibit-retinal-axon-regeneration-in-the-lizard-gallotia-galloti
#8
Dirk M Lang, Maria Del Mar Romero-Alemán, Bryony Dobson, Elena Santos, Maximina Monzón-Mayor
The myelin-associated protein Nogo-A contributes to the failure of axon regeneration in the mammalian central nervous system (CNS). Inhibition of axon growth by Nogo-A is mediated by the Nogo-66 receptor (NgR). Nonmammalian vertebrates, however, are capable of spontaneous CNS axon regeneration, and we have shown that retinal ganglion cell (RGC) axons regenerate in the lizard Gallotia galloti. Using immunohistochemistry, we observed spatiotemporal regulation of Nogo-A and NgR in cell bodies and axons of RGCs during ontogeny...
October 6, 2016: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/27611089/the-neurite-outgrowth-inhibitory-nogo-a-%C3%AE-20-region-is-an-intrinsically-disordered-segment-harbouring-three-stretches-with-helical-propensity
#9
Viviane Zelenay, Michael E Arzt, Stefan Bibow, Martin E Schwab, Roland Riek
Functional recovery from central neurotrauma, such as spinal cord injury, is limited by myelin-associated inhibitory proteins. The most prominent example, Nogo-A, imposes an inhibitory cue for nerve fibre growth via two independent domains: Nogo-A-Δ20 (residues 544-725 of the rat Nogo-A sequence) and Nogo-66 (residues 1026-1091). Inhibitory signalling from these domains causes a collapse of the neuronal growth cone via individual receptor complexes, centred around sphingosine 1-phosphate receptor 2 (S1PR2) for Nogo-A-Δ20 and Nogo receptor 1 (NgR1) for Nogo-66...
2016: PloS One
https://www.readbyqxmd.com/read/27578914/nogo-receptor-1-is-expressed-in-both-primary-cultured-glial-cells-and-neurons
#10
Junichi Ukai, Shiro Imagama, Tomohiro Ohgomori, Zenya Ito, Kei Ando, Naoki Ishiguro, Kenji Kadomatsu
Nogo receptor (NgR) is common in myelin-derived molecules, i.e., Nogo, MAG, and OMgp, and plays important roles in both axon fasciculation and the inhibition of axonal regeneration. In contrast to NgR's roles in neurons, its roles in glial cells have been poorly explored. Here, we found a dynamic regulation of NgR1 expression during development and neuronal injury. NgR1 mRNA was consistently expressed in the brain from embryonic day 18 to postnatal day 25. In contrast, its expression significantly decreased in the spinal cord during development...
August 2016: Nagoya Journal of Medical Science
https://www.readbyqxmd.com/read/27354599/prognostic-significance-of-nogo-a-b-and-nogo-b-receptor-expression-in-malignant-melanoma-a-preliminary-study
#11
Jacek Calik, Bartosz Pula, Aleksandra Piotrowska, Andrzej Wojnar, Wojciech Witkiewicz, Jedrzej Grzegrzolka, Marzena Podhorska-Okolow, Piotr Dziegiel
BACKGROUND: Neurite outgrowth inhibitor type B (NOGO-B) and its receptor (NGBR) were shown to regulate various crucial cellular processes and may be therefore potential factors influencing carcinogenesis. MATERIALS AND METHODS: Expression of NOGO-A, NOGO-A/B and NGBR was studied in benign melanocytic lesions and primary tumors and metastases of malignant melanoma (MM). RESULTS: Cytoplasmic expression of the studied antigens was detected in melanocytes and MM cells...
July 2016: Anticancer Research
https://www.readbyqxmd.com/read/27353365/the-er-structural-protein-rtn4a-stabilizes-and-enhances-signaling-through-the-receptor-tyrosine-kinase-erbb3
#12
Jason Hatakeyama, Jessica H Wald, Hanine Rafidi, Antonio Cuevas, Colleen Sweeney, Kermit L Carraway
ErbB3 and ErbB4 are receptor tyrosine kinases that are activated by the neuregulin (NRG) family of growth factors. These receptors govern various developmental processes, and their dysregulation contributes to several human disease states. The abundance of ErbB3 and ErbB4, and thus signaling through these receptors, is limited by the E3 ubiquitin ligase Nrdp1, which targets ErbB3 and ErbB4 for degradation. Reticulons are proteins that influence the morphology of the endoplasmic reticulum (ER) by promoting the formation of tubules, a response of cells to some stressors...
2016: Science Signaling
https://www.readbyqxmd.com/read/27349794/nogo-a-regulates-spatial-learning-as-well-as-memory-formation-and-modulates-structural-plasticity-in-the-adult-mouse-hippocampus
#13
Marta Zagrebelsky, Niklas Lonnemann, Steffen Fricke, Yves Kellner, Eike Preuß, Kristin Michaelsen-Preusse, Martin Korte
Behavioral learning has been shown to involve changes in the function and structure of synaptic connections of the central nervous system (CNS). On the other hand, the neuronal circuitry in the mature brain is characterized by a high degree of stability possibly providing a correlate for long-term storage of information. This observation indicates the requirement for a set of molecules inhibiting plasticity and promoting stability thereby providing temporal and spatial specificity to plastic processes. Indeed, signaling of Nogo-A via its receptors has been shown to play a crucial role in restricting activity-dependent functional and structural plasticity in the adult CNS...
June 24, 2016: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/27339102/agenesis-of-the-corpus-callosum-in-nogo-receptor-deficient-mice
#14
Seung-Wan Yoo, Mary G Motari, Ronald L Schnaar
The corpus callosum (CC) is the largest fiber tract in the mammalian brain, linking the bilateral cerebral hemispheres. CC development depends on the proper balance of axon growth cone attractive and repellent cues leading axons to the midline then directing them to the contralateral hemisphere. Imbalance of these cues results in CC agenesis or dysgenesis. Nogo receptors (NgR1, NgR2, NgR3) are growth cone directive molecules known for inhibiting axon regeneration after injury. We report that mice that lack Nogo receptors (NgR123-null mice) display complete CC agenesis due to axon misdirection evidenced by ectopic axons including cortical Probst bundles...
June 23, 2016: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/27273864/neuronal-nogo-a-in-new-born-retinal-ganglion-cells-implication-for-the-formation-of-the-age-related-fiber-order-in-the-optic-tract
#15
Dongqiang Su, Huaicun Liu, Sun-On Chan, Jun Wang
Nogo-A is highly expressed in oligodendrocytes in the adult central nervous system (CNS). Recently it was found that Nogo-A is also expressed in some neuronal types during development. Here, we examined the expression pattern of Nogo-A in both the retina and optic tract (OT) of mouse embryos from E12 to E15. After perturbation of its function in the OT for 5 hr in the brain slice culture system using a Nogo-A specific antibody or antagonist of its receptor (NEP1-40), the optic nerve fibers and growth cones were traced with DiI...
August 2016: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/27241709/lorcaserin-and-cp-809101-reduce-motor-impulsivity-and-reinstatement-of-food-seeking-behavior-in-male-rats-implications-for-understanding-the-anti-obesity-property-of-5-ht2c-receptor-agonists
#16
Guy A Higgins, Leo B Silenieks, Everett B Altherr, Cam MacMillan, Paul J Fletcher, Wayne E Pratt
RATIONALE: The 5-HT2C receptor agonist lorcaserin (Belviq®) has been approved by the FDA for the treatment of obesity. Impulsivity is a contributory feature of some eating disorders. OBJECTIVE: Experiments investigated the effect of lorcaserin and the highly selective 5-HT2C agonist CP-809101 on measures of impulsivity and on reinstatement of food-seeking behaviour, a model of dietary relapse. The effect of both drugs on 22-h deprivation-induced feeding was also examined, as was the effect of prefeeding in each impulsivity test...
July 2016: Psychopharmacology
https://www.readbyqxmd.com/read/27180168/enhanced-attention-and-impulsive-action-following-nmda-receptor-glun2b-selective-antagonist-pretreatment
#17
Guy A Higgins, Leo B Silenieks, Cam MacMillan, Julia Sevo, Fiona D Zeeb, Sandy Thevarkunnel
NMDA GluN2B (NR2B) subtype selective antagonists are currently in clinical development for a variety of indications, including major depression. We previously reported the selective NMDA GluN2B antagonists Ro 63-1908 and traxoprodil, increase premature responding in a 5-choice serial reaction time task (5-CSRTT) suggesting an effect on impulsive action. The present studies extend these investigations to a Go-NoGo and delay discounting task, and the 5-CSRTT under test conditions of both regular (5s) and short (2-5s) multiple ITI (Intertrial interval)...
September 15, 2016: Behavioural Brain Research
https://www.readbyqxmd.com/read/27166169/nogo-66-restricts-synaptic-strengthening-via-lingo1-and-the-rock2-cofilin-pathway-to-control-actin-dynamics
#18
Cristina Iobbi, Martin Korte, Marta Zagrebelsky
Nogo-A restricts long-term potentiation (LTP) at the Schaffer collateral-CA1 pathway in the adult hippocampus via 2 extracellular domains: Nogo-A-Δ20 and Nogo-66. Nogo-66 signals via Nogo Receptor 1 (NgR1) to regulate synaptic function. Whether the NgR1 coreceptors Lingo1 and p75(NTR) are involved in the signaling in this context is still not known. Moreover, the intracellular cascade mediating the activity of Nogo-66 in restricting LTP is unexplored. We combine electrophysiology and biochemistry in acute hippocampal slices and demonstrate that a loss of function for Lingo1 results in a significant increase in LTP levels at the Schaffer collateral-CA1 pathway, and that Lingo1 is the NgR1 coreceptor mediating the role of Nogo-66 in restricting LTP...
May 10, 2016: Cerebral Cortex
https://www.readbyqxmd.com/read/27158676/endothelial-nogo-b-regulates-sphingolipid-biosynthesis-to-promote-pathological-cardiac-hypertrophy-during-chronic-pressure-overload
#19
Yi Zhang, Yan Huang, Anna Cantalupo, Paula S Azevedo, Mauro Siragusa, Jacek Bielawski, Frank J Giordano, Annarita Di Lorenzo
We recently discovered that endothelial Nogo-B, a membrane protein of the ER, regulates vascular function by inhibiting the rate-limiting enzyme, serine palmitoyltransferase (SPT), in de novo sphingolipid biosynthesis. Here, we show that endothelium-derived sphingolipids, particularly sphingosine-1-phosphate (S1P), protect the heart from inflammation, fibrosis, and dysfunction following pressure overload and that Nogo-B regulates this paracrine process. SPT activity is upregulated in banded hearts in vivo as well as in TNF-α-activated endothelium in vitro, and loss of Nogo removes the brake on SPT, increasing local S1P production...
April 21, 2016: JCI Insight
https://www.readbyqxmd.com/read/27141624/-effect-of-electroacupuncture-intervention-combined-with-gastrodin-administration-on-neurological-function-nogo-a-and-ngr-expression-in-the-frontal-lobe-cortex-of-focal-cerebral-ischemia-rats
#20
Feng Wu, Huai-bin Li, Jian Zhao, Hua-chun Miao, Rui Huang, Jian Ding, Ke-ren Xiong
OBJECTIVE: To observe the effect of electroacupuncture (EA) intervention combined with medication (Gastrodin) on changes of neurological function and expression of Nogo-A and Nogo-A receptor (NgR) in the frontal lobe cortex around the ischemic loci of focal cerebral ischemia (FCI) rats, so as to explore its mechanism underlying improvement of neuroregeneration of FC. METHODS: Fifty male Sprague-Dawley rats were randomly divided into normal control, model, EA, medication and EA+ medication groups (n = 10 in each group)...
February 2016: Zhen Ci Yan Jiu, Acupuncture Research
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