keyword
MENU ▼
Read by QxMD icon Read
search

AMPA receptor

keyword
https://www.readbyqxmd.com/read/28719803/elevated-sterol-regulatory-elementary-binding-protein-1-and-glua2-levels-in-the-hippocampal-nuclear-fraction-of-genetic-absence-epilepsy-rats-from-strasbourg
#1
Sathiya Sekar, Entesar Omran, Venkat Gopalakrishnan, John G Howland, Terrance P Snutch, Changiz Taghibiglou
Studies in animal models and human tissues show that nuclear translocation of sterol regulatory element binding protein 1 (SREBP1) and glutamate A2 subunit (GluA2) of cell-surface AMPA receptor (AMPAR) trigger neuronal excitotoxicity-induced apoptosis in stroke. However, it is not known whether a similar type of underlying pathophysiology occurs in absence epilepsy. To explore this issue, we examined the levels of mature SREBP1, GluA2, glyceraldehyde 3-phosphate dehydrogenase (GAPDH), p53, and activated to total caspase 3 ratio in nuclear fractions (NF) of hippocampal homogenate from 8 to 10 week old male Genetic Absence Epilepsy Rats from Strasbourg (GAERS) and non-epileptic control (NEC) strains...
July 12, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28717010/phosphorylation-of-the-kainate-receptor-kar-auxiliary-subunit-neto2-at-serine-409-regulates-synaptic-targeting-of-the-kar-subunit-gluk1
#2
Richa Madan Lomash, Nengyin Sheng, Yan Li, Roger A Nicoll, Katherine W Roche
Synaptic strength at excitatory synapses is determined by the presence of glutamate receptors (i.e. AMPA, NMDA and kainate receptors) at the synapse. Synaptic strength is modulated by multiple factors including assembly of different receptor subunits, interaction with auxiliary subunits and post translational modifications of either the receptors or their auxiliary subunits. Using mass spectrometry, we find that the intracellular region of neuropilin and tolloid-like proteins (Neto)1 and Neto2, the auxiliary subunits of KARs are phosphorylated by multiple kinases in vitro...
July 17, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28716957/ampa-receptors-control-fear-extinction-through-an-arc-dependent-mechanism
#3
Simon Trent, Philip Barnes, Jeremy Hall, Kerrie L Thomas
Activity-regulated cytoskeleton-associated protein (Arc) supports fear memory through synaptic plasticity events requiring actin cytoskeleton rearrangements. We have previously shown that reducing hippocampal Arc levels through antisense knockdown leads to the premature extinction of contextual fear. Here we show that the AMPA receptor antagonist CNQX elevates hippocampal Arc levels during extinction and blocks extinction that can be rescued by reducing Arc. Increasing Arc levels with CNQX also overcomes the actin-destabilizing properties of cytochalasin D and promotes extinction...
August 2017: Learning & Memory
https://www.readbyqxmd.com/read/28712654/activity-dependent-gating-of-parvalbumin-interneuron-function-by-the-perineuronal-net-protein-brevican
#4
Emilia Favuzzi, André Marques-Smith, Rubén Deogracias, Christian M Winterflood, Alberto Sánchez-Aguilera, Laura Mantoan, Patricia Maeso, Cathy Fernandes, Helge Ewers, Beatriz Rico
Activity-dependent neuronal plasticity is a fundamental mechanism through which the nervous system adapts to sensory experience. Several lines of evidence suggest that parvalbumin (PV+) interneurons are essential in this process, but the molecular mechanisms underlying the influence of experience on interneuron plasticity remain poorly understood. Perineuronal nets (PNNs) enwrapping PV+ cells are long-standing candidates for playing such a role, yet their precise contribution has remained elusive. We show that the PNN protein Brevican is a critical regulator of interneuron plasticity...
July 10, 2017: Neuron
https://www.readbyqxmd.com/read/28699511/striatal-enriched-tyrosine-protein-phosphatase-step-in-the-mechanisms-of-depressive-disorders
#5
Elizabeth Kulikova, Alexander Kulikov
Striatal-enriched tyrosine protein phosphatase (STEP) is expressed mainly in the brain. Its dysregulation is associated with Alzheimer's and Huntington's diseases, schizophrenia, fragile X syndrome, drug abuse and stroke/ischemia. However, an association between STEP and depressive disorders is still obscure. The review discusses the theoretical foundations and experimental facts concerning possible relationship between STEP dysregulation and depression risk. STEP dephosphorylates and inactivates several key neuronal signaling proteins such as extracellular signal-regulating kinase 1 and 2 (ERK1/2), stress activated protein kinases p38, the Src family tyrosine kinases Fyn, Pyk2, NMDA and AMPA glutamate receptors...
July 10, 2017: Current Protein & Peptide Science
https://www.readbyqxmd.com/read/28695335/glutamatergic-system-and-mtor-signaling-pathway-participate-in-the-antidepressant-like-effect-of-inosine-in-the-tail-suspension-test
#6
Filipe Marques Gonçalves, Vivian Binder Neis, Débora Kurrle Rieger, Tanara V Peres, Mark William Lopes, Isabella A Heinrich, Ana Paula Costa, Ana Lúcia S Rodrigues, Manuella P Kaster, Rodrigo Bainy Leal
Glutamatergic system and mTOR signaling pathway have been proposed to be important targets for pharmacological treatment of major depressive disorder. Previous studies have shown that inosine, an endogenous purine, is able to exert a remarkable antidepressant-like effect in mice. Nevertheless, the role of glutamatergic system and mTOR in this effect was not previously determined. This study was designed to investigate the possible modulation of NMDA receptors (NMDAR), AMPA receptors (AMPAR) and mTOR complex 1 (mTORC1) signaling pathway in the inosine anti-immobility effect in the tail suspension test (TST) in mice...
July 10, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28693266/knockdown-of-glua2-induces-apoptosis-in-non-small-cell-lung-cancer-a549-cells-through-the-p53-signaling-pathway
#7
Hong-Yan Zhang, Wei Yang, Ji-Bin Lu
α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptors are important glutamatergic receptors that mediate fast excitatory synaptic transmission in the brain. Previous studies have demonstrated that glutamate ionotropic receptor AMPA type subunit 2 (GluA2), one of the four subunits that comprise AMPA receptors, is a potential novel marker for poor prognosis in patients with human lung cancer. However, the mechanisms of GluA2-induced apoptosis, proliferation and migration in lung cancer remain unknown...
July 2017: Oncology Letters
https://www.readbyqxmd.com/read/28691798/structure-and-affinity-of-two-bicyclic-glutamate-analogues-at-ampa-and-kainate-receptors
#8
Stine Møllerud, Andrea Pinto, Laura Marconi, Karla Frydenvang, Thor S Thorsen, Saara K Laulumaa, Raminta Venskutonyte, Sebastian Winther, Ana M C Moral, Lucia Tamborini, Paola Conti, Darryl S Pickering, Jette Sandholm Kastrup
Ionotropic glutamate receptors (iGluRs) are involved in most of the fast excitatory synaptic transmission in the central nervous system. These receptors are important for learning and memory formation, but are also involved in the development of diseases such as Alzheimer's disease, epilepsy and depression. In order to understand the function of different types of iGluRs, selective agonists are invaluable as pharmacological tool compounds. Here, we report binding affinities of two bicyclic, conformationally restricted analogues of glutamate (CIP-AS and LM-12b) at AMPA (GluA2 and GluA3) and kainate receptor subunits (GluK1-3 and GluK5)...
July 10, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28688852/cdkl5-controls-postsynaptic-localization-of-glun2b-containing-nmda-receptors-in-the-hippocampus-and-regulates-seizure-susceptibility
#9
Kosuke Okuda, Shizuka Kobayashi, Masahiro Fukaya, Aya Watanabe, Takuto Murakami, Mai Hagiwara, Tempei Sato, Hiroe Ueno, Narumi Ogonuki, Sayaka Komano-Inoue, Hiroyuki Manabe, Masahiro Yamaguchi, Atsuo Ogura, Hiroshi Asahara, Hiroyuki Sakagami, Masashi Mizuguchi, Toshiya Manabe, Teruyuki Tanaka
Mutations in the Cyclin-dependent kinase-like 5 (CDKL5) gene cause severe neurodevelopmental disorders accompanied by intractable epilepsies, i.e. West syndrome or atypical Rett syndrome. Here we report generation of the Cdkl5 knockout mouse and show that CDKL5 controls postsynaptic localization of GluN2B-containing N-methyl-d-aspartate (NMDA) receptors in the hippocampus and regulates seizure susceptibility. Cdkl5 -/Y mice showed normal sensitivity to kainic acid; however, they displayed significant hyperexcitability to NMDA...
July 6, 2017: Neurobiology of Disease
https://www.readbyqxmd.com/read/28683304/inhibition-of-the-schizophrenia-associated-microrna-mir-137-disrupts-nrg1%C3%AE-neurodevelopmental-signal-transduction
#10
Kristen Therese Thomas, Bart Russell Anderson, Niraj Shah, Stephanie Elaine Zimmer, Daniel Hawkins, Arielle Nicole Valdez, Qiaochu Gu, Gary Jonathan Bassell
Genomic studies have repeatedly associated variants in the gene encoding the microRNA miR-137 with increased schizophrenia risk. Bioinformatic predictions suggest that miR-137 regulates schizophrenia-associated signaling pathways critical to neural development, but these predictions remain largely unvalidated. In the present study, we demonstrate that miR-137 regulates neuronal levels of p55γ, PTEN, Akt2, GSK3β, mTOR, and rictor. All are key proteins within the PI3K-Akt-mTOR pathway and act downstream of neuregulin (Nrg)/ErbB and BDNF signaling...
July 5, 2017: Cell Reports
https://www.readbyqxmd.com/read/28678159/computational-investigation-into-the-interactions-of-traditional-chinese-medicine-molecules-of-wenqingyin-with-glur2
#11
Yu-Hui Tseng, Po-Hsiang Chuang, Yu-Ren Huang, Cheng-Lung Chen
Docking and molecular dynamics simulations have been carried out to investigate the interaction of a traditional Chinese medicine, WenQingYin, with the glutamate receptor 2 (GluR2) subunit of the α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptor. Four representative drug components of WenQingYin, namely 2-(3,4-dihydroxyphenyl)-5,6,7-trihydroxy-4H-chromen-4-one (PHF), 4-hydroxy-3-methoxybenzoic acid (HMB), 4-(2,3-dihydroxy-3-methylbutoxy)-7H-furo[3,2-g]chromen-7-one (DHMBP) and methyl 7-formylcyclopenta[c]pyran-4-carboxylate (cerbinal), and their complexes with GluR2 were simulated...
July 5, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28677303/glial-eaat2-regulation-of-extracellular-nts-glutamate-critically-controls-neuronal-activity-and-cardiorespiratory-reflexes
#12
Michael P Matott, David D Kline, Eileen M Hasser
Glutamatergic signalling is critical in the nucleus tractus solitarii (nTS) for cardiorespiratory homeostasis and initiation of sensory reflexes, including the chemoreflex activated during hypoxia. Maintenance of nTS glutamate concentration occurs in part through astrocytic excitatory amino acid transporters (EAATs). We previously established the importance of EAATs in the nTS by demonstrating their inhibition produced neuronal excitation to alter basal cardiorespiratory function. Since EAAT2 is the most expressed EAAT in the nTS, this study specifically determined EAAT2's role in nTS astrocytes, their influence on neuronal and synaptic properties, and ultimately on basal and reflex cardiorespiratory function...
July 5, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28676256/neurotoxicity-of-propofol-on-rat-hypoglossal-motoneurons-in-vitro
#13
Laura Monni, Filippo Ghezzi, Silvia Corsini, Andrea Nistri
Although propofol is a widely used intravenous general anaesthetic, many studies report its toxic potential, particularly on the developing central nervous system. We investigated its action on hypoglossal motoneurons (HMs) that control two critical functions in neonates, namely tongue muscle activity and airway patency. Thus, clinically relevant concentrations of propofol (1 and 5μM) were applied (4h) to neonatal rat brainstem slices to evaluate the expression of apoptosis-inducing factor (AIF) as biomarker of toxicity...
July 1, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28675819/anti-neuronal-autoantibodies-in-both-drug-responsive-and-resistant-focal-seizures-with-unknown-cause
#14
Gokcen Gozubatik-Celik, Cigdem Ozkara, Canan Ulusoy, Aysegul Gunduz, Sakir Delil, Naz Yeni, Erdem Tuzun
BACKGROUND: and Objective Autoimmunity is an emerging field of research in the etiology of different neurological disorders including epilepsy. We aimed to investigate the presence of neuronal autoantibodies in focal epilepsy with unknown cause and their clinical correlates in both drug-responsive and resistant patients. METHOD: Between 2009 and 2010 94 patients were prospectively enrolled, had their antibodies tested and clinically followed." An additional 50 age- and gender-matched controls were also tested for antibodies...
June 17, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28675564/activation-of-serotonergic-neurons-in-the-medullary-caudal-raphe-shortens-the-laryngeal-chemoreflex-in-anaesthetized-neonatal-rats
#15
William T Donnelly, Luxi Xia, Donald Bartlett, J C Leiter
What is the central question of this study? Does activation of serotonergic neurons in the caudal medullary raphe, some of which project to the nucleus of the solitary tract, shorten the laryngeal chemoreflex? What is the main finding and its importance? We found that serotonin originating from neurons in the caudal raphe acts through a 5-HT3 receptor located in the nucleus of the solitary tract to terminate reflex apnoea. Failure or deficiency of this arousal-related process is likely to be relevant to the pathogenesis of sudden infant death syndrome...
July 3, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28675162/ampa-receptor-specific-biogenesis-complexes-control-synaptic-transmission-and-intellectual-ability
#16
Aline Brechet, Rebecca Buchert, Jochen Schwenk, Sami Boudkkazi, Gerd Zolles, Karine Siquier-Pernet, Irene Schaber, Wolfgang Bildl, Abdelkrim Saadi, Christine Bole-Feysot, Patrick Nitschke, Andre Reis, Heinrich Sticht, Nouriya Al-Sanna'a, Arndt Rolfs, Akos Kulik, Uwe Schulte, Laurence Colleaux, Rami Abou Jamra, Bernd Fakler
AMPA-type glutamate receptors (AMPARs), key elements in excitatory neurotransmission in the brain, are macromolecular complexes whose properties and cellular functions are determined by the co-assembled constituents of their proteome. Here we identify AMPAR complexes that transiently form in the endoplasmic reticulum (ER) and lack the core-subunits typical for AMPARs in the plasma membrane. Central components of these ER AMPARs are the proteome constituents FRRS1l (C9orf4) and CPT1c that specifically and cooperatively bind to the pore-forming GluA1-4 proteins of AMPARs...
July 4, 2017: Nature Communications
https://www.readbyqxmd.com/read/28674256/prenatal-exposure-to-tributyltin-decreases-glur2-expression-in-the-mouse-brain
#17
Keishi Ishida, Takashi Saiki, Kanae Umeda, Masatsugu Miyara, Seigo Sanoh, Shigeru Ohta, Yaichiro Kotake
Tributyltin (TBT), a common environmental contaminant, is widely used as an antifouling agent in paint. We previously reported that exposure of primary cortical neurons to TBT in vitro decreased the α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptor subunit glutamate receptor 2 (GluR2) expression and subsequently increased neuronal vulnerability to glutamate. Therefore, to identify whether GluR2 expression also decreases after TBT exposure in vivo, we evaluated the changes in GluR2 expression in the mouse brain after prenatal or postnatal exposure to 10 and 25 ppm TBT through pellet diets...
2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28673833/the-glutamate-receptor-antagonists-cnqx-and-mpep-decrease-fast-ripple-events-in-rats-treated-with-kainic-acid
#18
Laura Medina-Ceja, Carla García-Barba
Fast ripples (FR) are high frequency oscillations (250-600Hz) that have been associated with epilepsy. FR are assumed to be generated in small areas of the hippocampus (1mm(3)) that contain pathologically interconnected glutamate pyramidal cell clusters. Additionally, a relation between glutamate neurotransmission and α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid/kainite (AMPA/KA) and metabotropic mGluR5 receptors is well established. Therefore, we hypothesized that antagonism of these glutamate receptors would decrease FR activity...
June 30, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28669596/role-of-microglia-in-mechanical-allodynia-in-the-anterior-cingulate-cortex
#19
Keisuke Miyamoto, Kazuhiko Kume, Masahiro Ohsawa
Plastic changes that increase nociceptive transmission are observed in several brain regions under conditions of chronic pain. Synaptic plasticity in the anterior cingulate cortex (ACC) is particularly associated with neuropathic pain. Glial cells are considered candidates for the modulation of neural plastic changes in the central nervous system. In this study, we aimed to investigate the role of ACC glial cells in the development of neuropathic pain. First, we examined the expression of glial cells in the ACC of nerve-ligated mice...
June 21, 2017: Journal of Pharmacological Sciences
https://www.readbyqxmd.com/read/28668281/disruption-of-glua2-phosphorylation-potentiates-stress-responsivity
#20
Alexandra S Ellis, Anne Q Fosnocht, Kelsey E Lucerne, Lisa A Briand
Cocaine addiction is characterized by persistent craving and addicts frequently relapse even after long periods of abstinence. Exposure to stress can precipitate relapse in humans and rodents. Stress and drug use can lead to common alterations in synaptic plasticity and these commonalities may contribute to the ability of stress to elicit relapse. These common changes in synaptic plasticity are mediated, in part, by alterations in the trafficking and stabilization of AMPA receptors. Exposure to both cocaine and stress can lead to alterations in protein kinase C-mediated phosphorylation of GluA2 AMPA subunits and thus alter the trafficking of GluA2-containing AMPARs...
June 28, 2017: Behavioural Brain Research
keyword
keyword
57547
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"