keyword
MENU ▼
Read by QxMD icon Read
search

kainate receptor

keyword
https://www.readbyqxmd.com/read/28325839/identification-and-characterization-of-rna-aptamers-a-long-aptamer-blocks-the-ampa-receptor-and-a-short-aptamer-blocks-both-ampa-and-kainate-receptors
#1
William J Jaremko, Zhen Huang, Wei Wen, Andrew Wu, Nicholas Karl, Li Niu
AMPA and kainate receptors, along with NMDA receptors, represent different subtypes of glutamate ion channels. AMPA and kainate receptors share a high degree of sequence and structural similarities, and excessive activity of these receptors has been implicated in neurological diseases such as epilepsy. Therefore, blocking detrimental activity of both receptor types could be therapeutically beneficial. Here, we report the use of an in vitro evolution approach involving systematic evolution of ligands by exponential enrichment with a single AMPA receptor target (i...
March 21, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28321180/multiple-kinases-involved-in-the-nicotinic-modulation-of-gamma-oscillations-in-the-rat-hippocampal-ca3-area
#2
JianGang Wang, XiaoLong He, Fangli Guo, XiangLin Cheng, Yali Wang, XiaoFang Wang, ZhiWei Feng, Martin Vreugdenhil, ChengBiao Lu
Neuronal synchronization at gamma band frequency (20-80 Hz, γ oscillations) is closely associated with higher brain function, such as learning, memory and attention. Nicotinic acetylcholine receptors (nAChRs) are highly expressed in the hippocampus, and modulate hippocampal γ oscillations, but the intracellular mechanism underlying such modulation remains elusive. We explored multiple kinases by which nicotine can modulate γ oscillations induced by kainate in rat hippocampal area CA3 in vitro. We found that inhibitors of cyclic AMP dependent kinase (protein kinase A, PKA), protein kinase C (PKC), N-methyl-D-aspartate receptor (NMDA) receptors, Phosphoinositide 3-kinase (PI3K) and extracellular signal-related kinases (ERK), each individually could prevent the γ oscillation-enhancing effect of 1 μM nicotine, whereas none of them affected baseline γ oscillation strength...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28284346/ampa-nmda-and-kainate-glutamate-receptor-subunits-are-expressed-in-human-peripheral-blood-mononuclear-cells-pbmcs-where-the-expression-of-gluk4-is-altered-by-pregnancy-and-glun2d-by-depression-in-pregnant-women
#3
Amol K Bhandage, Zhe Jin, Charlotte Hellgren, Sergiy V Korol, Krzysztof Nowak, Louise Williamsson, Inger Sundström-Poromaa, Bryndis Birnir
The amino acid glutamate opens cation permeable ion channels, the iGlu receptors. These ion channels are abundantly expressed in the mammalian brain where glutamate is the main excitatory neurotransmitter. The neurotransmitters and their receptors are being increasingly detected in the cells of immune system. Here we examined the expression of the 18 known subunits of the iGlu receptors families; α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA), kainate, N-methyl-d-aspartate (NMDA) and delta in human peripheral blood mononuclear cells (PBMCs)...
April 15, 2017: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/28267150/ablation-of-neuropsin-neuregulin-1-signaling-imbalances-erbb4-inhibitory-networks-and-disrupts-hippocampal-gamma-oscillation
#4
M Kawata, S Morikawa, S Shiosaka, H Tamura
Parvalbumin-expressing interneurons are pivotal for the processing of information in healthy brain, whereas the coordination of these functions is seriously disrupted in diseased brain. How these interneurons in the hippocampus participate in pathological functions remains unclear. We previously reported that neuregulin 1 (NRG1)-ErbB4 signaling, which is actuated by neuropsin, is important for coordinating brain plasticity. Neuropsin cleaves mature NRG1 (bound to extracellular glycosaminoglycans) in response to long-term potentiation or depression, liberating a soluble ligand that activates its receptor, ErbB4...
March 7, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28259043/glutamate-released-in-the-preoptic-area-during-sexual-behavior-controls-local-estrogen-synthesis-in-male-quail
#5
Catherine de Bournonville, Ilse Smolders, Ann Van Eeckhaut, Gregory F Ball, Jacques Balthazart, Charlotte A Cornil
Estrogens are known to act rapidly, probably via membrane estrogen receptors, to induce fast effects on physiological and behavioral processes. Engaging in some of these behaviors, such as sexual behavior, results in an acute modulation of the production of estrogens in the brain by regulating the efficiency of the estrogen synthase enzyme, aromatase. We recently demonstrated that aromatase activity (AA) in the male quail brain is rapidly inhibited in discrete brain regions including the medial preoptic nucleus (POM) following exposure to a female...
February 8, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28257918/ceftriaxone-mediated-upregulation-of-the-glutamate-transporter-glt-1-contrasts-neurotoxicity-evoked-by-kainate-in-rat-organotypic-spinal-cord-cultures
#6
Dzejla Bajrektarevic, Andrea Nistri
Excitotoxicity is a major pathological trigger of neurodegenerative diseases like amyotrophic lateral sclerosis. This process is caused by excessive release of the transmitter glutamate that overwhelms the capacity of astroglia transporters to maintain a low extracellular level of this aminoacid and strongly stimulates neurons. Using an in vitro model of rat organotypic spinal slice culture, we explored if the excitotoxicity caused by the potent glutamate analogue kainate, widely employed as a paradigm to evoke neurotoxicity in the central nervous system, was prevented by the antibiotic ceftriaxone known to enhance glutamate transporter expression...
March 1, 2017: Neurotoxicology
https://www.readbyqxmd.com/read/28251991/synaptic-plasticity-kainate-receptors-can-ltp
#7
Sian Lewis
No abstract text is available yet for this article.
April 2017: Nature Reviews. Neuroscience
https://www.readbyqxmd.com/read/28238551/molecular-mechanism-of-ampa-receptor-modulation-by-tarp-stargazin
#8
Anat Ben-Yaacov, Moshe Gillor, Tomer Haham, Alon Parsai, Mohammad Qneibi, Yael Stern-Bach
AMPA receptors (AMPARs) mediate the majority of fast excitatory transmission in the brain and critically contribute to synaptic plasticity and pathology. AMPAR trafficking and gating are tightly controlled by auxiliary transmembrane AMPAR regulatory proteins (TARPs). Here, using systematic domain swaps with the TARP-insensitive kainate receptor GluK2, we show that AMPAR interaction with the prototypical TARP stargazin/γ2 primarily involves the AMPAR membrane domains M1 and M4 of neighboring subunits, initiated or stabilized by the AMPAR C-tail, and that these interactions are sufficient to enable full receptor modulation...
February 17, 2017: Neuron
https://www.readbyqxmd.com/read/28235897/neto2-assembles-with-kainate-receptors-in-drg-neurons-during-development-and-modulates-neurite-outgrowth-in-adult-sensory-neurons
#9
Claire G Vernon, Geoffrey T Swanson
Peripheral sensory neurons in the dorsal root ganglia (DRG) are the initial transducers of sensory stimuli, including painful stimuli, from the periphery to central sensory and pain-processing centers. Small- to medium-diameter non-peptidergic neurons in the neonatal DRG express functional kainate receptors (KARs), one of three sub-families of ionotropic glutamate receptors, as well as the putative KAR auxiliary subunit Neto2. Neto2 markedly alters recombinant KAR function but has yet to be confirmed as an auxiliary subunit that assembles with and alters function of endogenous KARs...
February 24, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28235805/a-kainate-receptor-subunit-promotes-the-recycling-of-the-neuron-specific-k-cl-cotransporter-kcc2-in-hippocampal-neurons
#10
Jessica C Pressey, Vivek Mahadevan, C Sahara Khademullah, Zahra Dargaei, Jonah Chevrier, Alamjeet K Chauhan, Steven J Meas, Pavel Uvarov, Matti S Airaksinen, Melanie A Woodin
Synaptic inhibition depends on a transmembrane gradient of chloride, which is set by the neuron-specific K+-Cl- cotransporter KCC2. Reduced KCC2 levels in the neuronal membrane contribute to the generation of epilepsy, neuropathic pain, and autism spectrum disorders; thus, it is important to characterize the mechanisms regulating KCC2 expression. In the present study, we determined the role of KCC2-protein interactions in regulating total and surface-membrane KCC2 expression. Using quantitative immunofluorescence in cultured mouse hippocampal neurons, we discovered that the kainate receptor subunit GluK2 and the auxiliary subunit Neto2 significantly increase the total KCC2 abundance in neurons, but that GluK2 exclusively increases the abundance of KCC2 in the surface membrane...
February 24, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28228252/complete-disruption-of-the-kainate-receptor-gene-family-results-in-corticostriatal-dysfunction-in-mice
#11
Jian Xu, John J Marshall, Herman B Fernandes, Toshihiro Nomura, Bryan A Copits, Daniele Procissi, Susumu Mori, Lei Wang, Yongling Zhu, Geoffrey T Swanson, Anis Contractor
Kainate receptors are members of the glutamate receptor family that regulate synaptic function in the brain. They modulate synaptic transmission and the excitability of neurons; however, their contributions to neural circuits that underlie behavior are unclear. To understand the net impact of kainate receptor signaling, we generated knockout mice in which all five kainate receptor subunits were ablated (5ko). These mice displayed compulsive and perseverative behaviors, including over-grooming, as well as motor problems, indicative of alterations in striatal circuits...
February 21, 2017: Cell Reports
https://www.readbyqxmd.com/read/28219683/the-c1q-complement-family-of-synaptic-organizers-not-just-complementary
#12
REVIEW
Michisuke Yuzaki
Molecules that regulate formation, differentiation, and maintenance of synapses are called synaptic organizers. Recently, various 'C1q family' proteins have been shown to be released from neurons, and serve as a new class of synaptic organizers. Cbln1 and C1ql1 proteins regulate the formation and maintenance of parallel fiber-Purkinje cell and climbing fiber-Purkinje cell synapses, respectively, in the cerebellum. Cbln1 also modulates the function of postsynaptic delta2 glutamate receptors to regulate synaptic plasticity...
February 17, 2017: Current Opinion in Neurobiology
https://www.readbyqxmd.com/read/28192396/metabotropic-action-of-postsynaptic-kainate-receptors-triggers-hippocampal-long-term-potentiation
#13
Milos M Petrovic, Silvia Viana da Silva, James P Clement, Ladislav Vyklicky, Christophe Mulle, Inmaculada M González-González, Jeremy M Henley
Long-term potentiation (LTP) in the rat hippocampus is the most extensively studied cellular model for learning and memory. Induction of classical LTP involves an NMDA-receptor- and calcium-dependent increase in functional synaptic AMPA receptors, mediated by enhanced recycling of internalized AMPA receptors back to the postsynaptic membrane. Here we report a physiologically relevant NMDA-receptor-independent mechanism that drives increased AMPA receptor recycling and LTP. This pathway requires the metabotropic action of kainate receptors and activation of G protein, protein kinase C and phospholipase C...
February 13, 2017: Nature Neuroscience
https://www.readbyqxmd.com/read/28180184/a-gain-of-function-mutation-in-the-grik2-gene-causes-neurodevelopmental-deficits
#14
Yomayra F Guzmán, Keri Ramsey, Jacob R Stolz, David W Craig, Mathew J Huentelman, Vinodh Narayanan, Geoffrey T Swanson
OBJECTIVE: To identify inherited or de novo mutations associated with a suite of neurodevelopmental abnormalities in a 10-year-old patient displaying ataxia, motor and speech delay, and intellectual disability. METHODS: We performed whole-exome sequencing of the proband and her parents. A pathogenic gene variant was identified as damaging based on sequence conservation, gene function, and association with disorders having similar phenotypic profiles. Functional characterization of the mutated protein was performed in vitro using a heterologous expression system...
February 2017: Neurology. Genetics
https://www.readbyqxmd.com/read/28173961/a-screen-for-modulators-reveals-that-orexin-a-rapidly-stimulates-thyrotropin-releasing-hormone-expression-and-release-in-hypothalamic-cell-culture
#15
Antonieta Cote-Vélez, Anabel Martínez Báez, Leticia Lezama, Rosa María Uribe, Patricia Joseph-Bravo, Jean-Louis Charli
In the paraventricular nucleus of the mammalian hypothalamus, hypophysiotropic thyrotropin releasing hormone (TRH) neurons integrate metabolic information and control the activity of the thyroid axis. Additional populations of TRH neurons reside in various hypothalamic areas, with poorly defined connections and functions, albeit there is evidence that some may be related to energy balance. To establish extracellular modulators of TRH hypothalamic neurons activity, we performed a screen of neurotransmitters effects in hypothalamic cultures...
February 2, 2017: Neuropeptides
https://www.readbyqxmd.com/read/28161868/protective-effect-of-resveratrol-on-the-brain-in-a-rat-model-of-epilepsy
#16
Zhen Li, Zhuyan You, Min Li, Liang Pang, Juan Cheng, Liecheng Wang
Accumulating evidence has suggested resveratrol as a promising drug candidate for the treatment of epilepsy. To validate this, we tested the protective effect of resveratrol on a kainic acid (KA)-induced epilepsy model in rats and investigated the underlying mechanism. We found that acute resveratrol application partially inhibited evoked epileptiform discharges in the hippocampal CA1 region. During acute, silent and chronic phases of epilepsy, the expression of hippocampal kainate glutamate receptor (GluK2) and the GABAA receptor alpha1 subunit (GABAAR-alpha1) was up-regulated and down-regulated, respectively...
February 4, 2017: Neuroscience Bulletin
https://www.readbyqxmd.com/read/28153865/mechanisms-creating-transient-and-sustained-photoresponses-in-mammalian-retinal-ganglion-cells
#17
Xiwu Zhao, Aaron N Reifler, Melanie M Schroeder, Elizabeth R Jaeckel, Andrew P Chervenak, Kwoon Y Wong
Retinal neurons use sustained and transient light responses to encode visual stimuli of different frequency ranges, but the underlying mechanisms remain poorly understood. In particular, although earlier studies in retinal ganglion cells (RGCs) proposed seven potential mechanisms, all seven have since been disputed, and it remains unknown whether different RGC types use different mechanisms or how many mechanisms are used by each type. Here, we conduct a comprehensive survey in mice and rats of 12 candidate mechanisms that could conceivably produce tonic rod/cone-driven ON responses in intrinsically photosensitive RGCs (ipRGCs) and transient ON responses in three types of direction-selective RGCs (TRHR+, Hoxd10+ ON, and Hoxd10+ ON-OFF cells)...
March 6, 2017: Journal of General Physiology
https://www.readbyqxmd.com/read/28128211/glia-derived-atp-inversely-regulates-excitability-of-pyramidal-and-cck-positive-neurons
#18
Zhibing Tan, Yu Liu, Wang Xi, Hui-Fang Lou, Liya Zhu, Zhifei Guo, Lin Mei, Shumin Duan
Astrocyte responds to neuronal activity with calcium waves and modulates synaptic transmission through the release of gliotransmitters. However, little is known about the direct effect of gliotransmitters on the excitability of neuronal networks beyond synapses. Here we show that selective stimulation of astrocytes expressing channelrhodopsin-2 in the CA1 area specifically increases the firing frequency of CCK-positive but not parvalbumin-positive interneurons and decreases the firing rate of pyramidal neurons, phenomena mimicked by exogenously applied ATP...
January 27, 2017: Nature Communications
https://www.readbyqxmd.com/read/28112265/excessive-activation-of-ionotropic-glutamate-receptors-induces-apoptotic-hair-cell-death-independent-of-afferent-and-efferent-innervation
#19
Lavinia Sheets
Accumulation of excess glutamate plays a central role in eliciting the pathological events that follow intensely loud noise exposures and ischemia-reperfusion injury. Glutamate excitotoxicity has been characterized in cochlear nerve terminals, but much less is known about whether excess glutamate signaling also contributes to pathological changes in sensory hair cells. I therefore examined whether glutamate excitotoxicity damages hair cells in zebrafish larvae exposed to drugs that mimic excitotoxic trauma...
January 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28109667/aberrant-alpha-and-gamma-oscillations-ex-vivo-after-single-application-of-the-nmda-receptor-antagonist-mk-801
#20
Clément E Lemercier, Constance Holman, Zoltan Gerevich
Clinical symptoms of schizophrenia are associated with altered cortical neuronal oscillations in multiple frequency bands such as alpha (7-13Hz) and gamma (30-90Hz) rhythms. NMDA receptor antagonists induce psychotic symptoms in humans and a schizophrenia-like phenotype in animals, suggesting NMDA receptor dysfunction is involved in the generation of many symptoms of the disorder. We investigated the effects of a single intraperitoneal injection of the NMDA receptor antagonist MK-801 in rats, a model of first-episode schizophrenia, on network oscillations recorded ex vivo in the hippocampus and prefrontal cortex...
January 18, 2017: Schizophrenia Research
keyword
keyword
31610
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"