Showing 1-30 of 38 results for "C9847"
Patricio Opazo et al.
Neuron, 67(2), 239-252 (2010-07-31)
The Ca(2+)/calmodulin-dependent protein kinase II (CaMKII) is critically required for the synaptic recruitment of AMPA-type glutamate receptors (AMPARs) during both development and plasticity. However, the underlying mechanism is unknown. Using single-particle tracking of AMPARs, we show that CaMKII activation and...
Yan Sun et al.
Brain research, 1345, 103-109 (2010-05-22)
It was demonstrated in our recent study that Zn(2+) had dual effects on Ca(2+)-permeable AMPA receptors on carp retinal horizontal cells. However, the possible mechanism(s) underlying the Zn(2+) effects is still unclear. In the present study, we examined the Zn(2+)...
Reza Khanbabaie et al.
Journal of neurophysiology, 103(6), 3337-3348 (2010-04-02)
Short-term depression (STD) is observed at many synapses of the CNS and is important for diverse computations. We have discovered a form of fast STD (FSTD) in the synaptic responses of pyramidal cells evoked by stimulation of their electrosensory afferent...
Cole W Graydon et al.
The Journal of neuroscience : the official journal of the Society for Neuroscience, 34(24), 8358-8372 (2014-06-13)
Sensory processing in the auditory system requires that synapses, neurons, and circuits encode information with particularly high temporal and spectral precision. In the amphibian papillia, sound frequencies up to 1 kHz are encoded along a tonotopic array of hair cells...
Christian Krintel et al.
The Biochemical journal, 441(1), 173-178 (2011-09-08)
Positive allosteric modulators of the ionotropic glutamate receptor-2 (GluA2) are promising compounds for the treatment of cognitive disorders, e.g. Alzheimer's disease. These modulators bind within the dimer interface of the LBD (ligand-binding domain) and stabilize the agonist-bound conformation slowing receptor...
Joana Galvao et al.
Experimental eye research, 140, 65-74 (2015-08-25)
Death of retinal neural cells, namely retinal ganglion cells (RGCs), is a characteristic of several retinal neurodegenerative diseases. Although the role of adenosine A3 receptor (A3R) in neuroprotection is controversial, A3R activation has been reported to afford protection against several...
H Schmidhammer et al.
Journal of medicinal chemistry, 32(2), 418-421 (1989-02-01)
(-)-N-(Cyclopropylmethyl)-4,14-dimethoxymorphinan-6-one (2) was synthesized with 4,14-dimethoxy-N-methylmorphinan-6-one (1) as starting material. In vivo and in vitro experiments show 2 (cyprodime) to be a pure opioid receptor antagonist. Some of these tests (opioid receptor binding assays, guinea pig ileal longitudinal muscle preparation...
Lisa Grant et al.
The Journal of neuroscience : the official journal of the Society for Neuroscience, 30(12), 4210-4220 (2010-03-26)
Cochlear inner hair cells (IHCs) convert sounds into receptor potentials and via their ribbon synapses into firing rates in auditory nerve fibers. Multivesicular release at individual IHC ribbon synapses activates AMPA-mediated EPSCs with widely ranging amplitudes. The underlying mechanisms and...
Stefanie M Jones et al.
PloS one, 6(9), e24892-e24892 (2011-09-29)
GABAergic inhibition in the central nervous system (CNS) can occur via rapid, transient postsynaptic currents and via a tonic increase in membrane conductance, mediated by synaptic and extrasynaptic GABA(A) receptors (GABA(A)Rs) respectively. Retinal bipolar cells (BCs) exhibit a tonic current...
Autumn M Weeks et al.
Neuropharmacology, 85, 57-66 (2014-06-01)
Positive allosteric modulators of α-amino-3-hydroxy-5-methyl-isoxazole-propionic acid (AMPA) ionotropic glutamate receptors facilitate synaptic plasticity and contribute essentially to learning and memory, properties which make AMPA receptors targets for drug discovery and development. One region at which several different classes of positive...
Chiara Cervetto et al.
Neuropharmacology, 99, 396-407 (2015-08-12)
The Bergmann glia is equipped with Ca2+-permeable AMPA receptors for glutamate, indispensable for structural and functional relations between the Bergmann glia and parallel/climbing fibers-Purkinje cell synapses. To better understand roles for the Bergmann AMPA receptors, herein we investigate on gliotransmitter...
Richard Piet et al.
The Journal of neuroscience : the official journal of the Society for Neuroscience, 31(46), 16591-16596 (2011-11-18)
The endocannabinoid (eCB) system and the cannabinoid CB1 receptor (CB1R) play key roles in the modulation of brain functions. Although actions of eCBs and CB1Rs are well described at the synaptic level, little is known of their modulation of neural...
Martin Loynaz Prieto et al.
The Journal of neuroscience : the official journal of the Society for Neuroscience, 30(12), 4449-4459 (2010-03-26)
AMPA receptors are ligand-gated ion channels that show multiple conductance levels, indicating that gating of individual AMPA subunits is to some extent independent of the other subunits. To study AMPAR subunit interactions during activation gating, we recorded from single channels...
Agnes Bonnot et al.
Journal of neurophysiology, 101(6), 2995-3011 (2009-03-27)
To further understand the excitatory effects of motoneurons on spinal network function, we investigated the entrainment of disinhibited rhythms by ventral root (VR) stimulation in the neonatal mouse spinal cord. A brief train of stimuli applied to a VR triggered...
David Soto et al.
The Journal of neuroscience : the official journal of the Society for Neuroscience, 34(35), 11673-11683 (2014-08-29)
Many properties of fast synaptic transmission in the brain are influenced by transmembrane AMPAR regulatory proteins (TARPs) that modulate the pharmacology and gating of AMPA-type glutamate receptors (AMPARs). Although much is known about TARP influence on AMPAR pharmacology and kinetics...
Shuzhen Kong et al.
Brain research, 1355, 207-213 (2010-08-04)
We have previously demonstrated that cyclothiazide (CTZ) is a potent convulsant drug inducing robust epileptiform activity in hippocampal neurons both in vitro and in vivo. Here we further establish an animal model for CTZ-induced behavioral seizures in freely moving rats....
Matthew A Kreitzer et al.
Visual neuroscience, 26(4), 375-387 (2009-08-15)
Glutamate is believed to be the primary excitatory neurotransmitter in the vertebrate retina, and its fast postsynaptic effects are elicited by activating NMDA-, kainate-, or AMPA-type glutamate receptors. We have characterized the ionotropic glutamate receptors present on retinal horizontal cells...
Jelena Baranovic et al.
The Journal of biological chemistry, 288(12), 8647-8657 (2013-02-06)
AMPA receptors (AMPARs) are glutamate-gated ion channels ubiquitous in the vertebrate central nervous system, where they mediate fast excitatory neurotransmission and act as molecular determinants of memory formation and learning. Together with detailed analyses of individual AMPAR domains, structural studies...
Soham Chanda et al.
Journal of neurophysiology, 103(4), 1915-1926 (2010-01-29)
Postsynaptic receptor desensitization has been observed to contribute to depression in immature synapses. However, it is not clear whether desensitization persists and causes depression in mature synapses. We investigate this issue at the endbulb of Held, the synapse made by...
Helle Hald et al.
Journal of molecular biology, 391(5), 906-917 (2009-07-14)
Ionotropic glutamate receptors (iGluRs) mediate fast excitatory neurotransmission. Upon glutamate application, 2-amino-3-(3-hydroxy-5-methyl-4-isoxazolyl)propionic acid receptors undergo rapid and almost complete desensitization that can be attenuated by positive allosteric modulators. The molecular mechanism of positive allosteric modulation has been elucidated previously by...
Anat Ben-Yaacov et al.
Neuron, 93(5), 1126-1137 (2017-02-28)
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...
Craig S Walker et al.
Current biology : CB, 19(11), 900-908 (2009-06-02)
Ionotropic glutamate receptors (iGluRs) are glutamate-gated ion channels that mediate excitatory neurotransmission in the central nervous system. Based on both molecular and pharmacological criteria, iGluRs have been divided into two major classes, the non-NMDA class, which includes both AMPA and...
Irene A Samengo et al.
Neurochemistry international, 90, 166-172 (2015-08-19)
In this study, we demonstrate the existence on trigeminal caudal nucleus (TCN) glutamatergic terminals of α4β2 nicotinic receptors (nAChRs) capable of enhancing the terminals' spontaneous release of [(3)H]d-aspartate ([(3)H]D-Asp). In rat TCN synaptosomes, spontaneous [(3)H]D-Asp release was increased by nicotine...
Yun Wang et al.
Neuropharmacology, 57(1), 49-59 (2009-04-28)
Brain-derived neurotrophic factor (BDNF) and its receptor TrkB play an important function in neuronal development and synaptic plasticity. Recently we have established that cyclothiazide (CTZ) is a novel convulsant drug inducing robust epileptiform activity in hippocampal neurons both in vitro...
Takayuki Yamashita et al.
The Journal of physiology, 587(Pt 10), 2327-2339 (2009-04-01)
At central glutamatergic synapses, neurotransmitter often saturates postsynaptic AMPA receptors (AMPARs), thereby restricting the dynamic range of synaptic efficacy. Here, using simultaneous pre- and postsynaptic whole-cell recordings, at the calyx of Held synapse of immature rats, we have investigated the...
M N Tran et al.
Visual neuroscience, 16(5), 835-842 (1999-12-02)
Amacrine cells that respond transiently to maintained illumination are thought to mediate transient inhibitory input to ganglion cells. The excitation of these transient amacrine cells is thought to be limited by inhibitory feedback to bipolar cells. We investigated the possibility...
Ada Ledonne et al.
Experimental neurology, 233(1), 292-302 (2011-11-08)
High frequency stimulation of the subthalamic nucleus (HFS-STN) has been successfully introduced to treat symptoms of advanced Parkinson's disease (PD) (rigidity, tremor and akinesia). In spite of its extensive clinical practice, little is known at cellular level about the effects...
Maria Summa et al.
Neuropharmacology, 61(8), 1282-1290 (2011-08-09)
α-Amino-3-hydroxy-5-methyl-4-isoxazole propionate (AMPA) autoreceptors exist on glutamate hippocampal terminals. Aimed at investigating whether these autoreceptors traffic constitutively, (S)AMPA-evoked [(3)H]D-ASP release from synaptosomes enriched with peptides that impede the interaction of GluA2 subunits with cytosolic proteins involved in receptor movements [namely...
Joyce Wondolowski et al.
The Journal of neuroscience : the official journal of the Society for Neuroscience, 29(2), 563-574 (2009-01-16)
Kainate receptors (KARs) contribute to postsynaptic excitation in only a select subset of neurons. To define the parameters that specify the postsynaptic expression of KARs, we examined the contribution of KARs to EPSCs on hippocampal interneurons in area CA1. Interneurons...
L O Trussell et al.
Neuron, 10(6), 1185-1196 (1993-06-01)
We have investigated the role of AMPA receptor desensitization during transmission at a calyceal synapse. Cyclothiazide blocked the rapid desensitization of AMPA receptors and markedly prolonged the decay time of the evoked excitatory postsynaptic current (PSC). This effect was greater...

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