Publications associées à Ionotropic glutamate receptor

Cell-type-specific nicotinic input disinhibits mouse barrel cortex during active sensing

Carl Petersen, Sylvain Crochet, Célia Roxane Gasselin, Benoît Hohl

Fast synaptic transmission relies upon the activation of ionotropic receptors by neurotransmitter release to evoke postsynaptic potentials. Glutamate and GABA play dominant roles in driving highly dynamic activity in synaptically connected neuronal circuit ...

CELL PRESS2021

Coincidence imaging spectroscopy of extreme-ultraviolet photoionisation processes in molecules and clusters

Andrew Daniel Bonnar Clark

Presented here is the design, construction and commissioning of a coincidence imaging spectroscopy endstation coupled to the Harmonium high-harmonic generation (HHG) extreme-ultraviolet photon source at the Lausanne Centre for Ultrafast Science. The endsta ...

EPFL2021

Impairment of Glycolysis-Derived L-Serine Production in Astrocytes Contributes to Cognitive Deficits in Alzheimer's Disease

Graham Knott

Alteration of brain aerobic glycolysis is often observed early in the course of Alzheimer's disease (AD). Whether and how such metabolic dysregulation contributes to both synaptic plasticity and behavioral deficits in AD is not known. Here, we show that th ...

Cell Press2020

Amygdala GluN2B-NMDAR dysfunction is critical in abnormal aggression of neurodevelopmental origin induced by St8sia2 deficiency

Graham Knott, Maria del Carmen Sandi Perez, Johannes Gräff, Jocelin Grosse, Olivia Zanoletti, Simone Astori, Elias Georges Gebara, Jose Vicente Sanchez Mut, Catherine Maclachlan, Wei Tang, Bianca Ambrogina Silva, Alexandre Claude Gustave Bacq

Aggression is frequently observed in neurodevelopmental psychiatric disorders such as schizophrenia, autism, and bipolar disorder. Due to a lack of understanding of its underlying mechanisms, effective treatments for abnormal aggression are still missing. ...

2020

Dual optical control and mechanistic insights into photoswitchable group II and III metabotropic glutamate receptors

Johannes Broichhagen

G protein-coupled receptor (GPCR) signaling occurs in complex spatiotemporal patterns that are difficult to probe using standard pharmacological and genetic approaches. A powerful approach for dissecting GPCRs is to use light-controlled pharmacological age ...

National Academy of Sciences2017

Learning improvement after PI3K activation correlates with de novo formation of functional small spines

Maria del Carmen Sandi Perez

PI3K activation promotes the formation of synaptic contacts and dendritic spines, morphological features of glutamatergic synapses that are commonly known to be related to learning processes. In this report, we show that in vivo administration of a peptide ...

2014

Definition and quantification of acute inflammatory white matter injury in the immature brain by MRI/MRS at high magnetic field

Rolf Gruetter, Nicolas Kunz

Background: Intrauterine growth restriction (IUGR) is a major risk factor for both perinatal and long-term morbidity. Bovine lactoferrin (bLf) is a major milk glycoprotein considered as a pleiotropic functional nutrient. The impact of maternal supplementat ...

Nature Publishing Group2014

Protective effects of maternal nutritional supplementation with lactoferrin on growth and brain metabolism

Rolf Gruetter, Yohan Van de Looij, Sylviane Métairon

Background:Intrauterine growth restriction (IUGR) is a major risk factor for both perinatal and long-term morbidity. Bovine lactoferrin (bLf) is a major milk glycoprotein considered as a pleiotropic functional nutrient. The impact of maternal supplementati ...

Nature Publishing Group2014

Pansynaptic Enlargement at Adult Cortical Connections Strengthened by Experience

Graham Knott

Behavioral experience alters the strength of neuronal connections in adult neocortex. These changes in synaptic strength are thought to be central to experience-dependent plasticity, learning, and memory. However, it is not known how changes in synaptic tr ...

Oxford University Press2014

Facilitation of AMPA receptor synaptic delivery as a molecular mechanism for cognitive enhancement

Maria del Carmen Sandi Perez, Erika Myrna Borcel Novoa, Lidia Alonso-Nanclares

Cell adhesion molecules and downstream growth factor-dependent signaling are critical for brain development and synaptic plasticity, and they have been linked to cognitive function in adult animals. We have previously developed a mimetic peptide (FGL) from ...

2012

Determination of Transmembrane Water Fluxes in Neurons Elicited by Glutamate Ionotropic Receptors and by the Co-transporters KCC2 and NKCC1: A Digital Holographic Microscopy Study

Pierre Magistretti, Christian Depeursinge, Benjamin Rappaz, Pierre Marquet, Nicolas Pavillon, Pascal Jourdain, Daniel Boss, Corinne Moratal

Digital holographic microscopy (DHM) is a noninvasive optical imaging technique that provides quantitative phase images of living cells. In a recent study, we showed that the quantitative monitoring of the phase signal by DHM was a simple label-free method ...

Society for Neuroscience2011

Complementary Function and Integrated Wiring of the Evolutionarily Distinct Drosophila Olfactory Subsystems

Pavan P Ramdya

To sense myriad environmental odors, animals have evolved multiple, large families of divergent olfactory receptors. How and why distinct receptor repertoires and their associated circuits are functionally and anatomically integrated is essentially unknown ...

2011

Semisynthetic Fluorescent Sensor Proteins Based on Self-Labeling Protein Tags

Matthias Albert Brun

Genetically encoded fluorescent sensor proteins offer the possibility to probe the concentration of key metabolites in living cells. The approaches currently used to generate such fluorescent sensor proteins lack generality, as they require a protein that ...

EPFL2011

H-1-[C-13] NMR Spectroscopy of the Rat Brain During Infusion of [2-C-13] Acetate at 14.1 T

Rolf Gruetter, Lijing Xin, Bernard Lanz

Full signal intensity H-1-[C-13] NMR spectroscopy, combining a preceding C-13-editing block based on an inversion BISEP (B-1-insensitive spectral editing pulse) with a spin-echo coherence-based localization, was developed and implemented at 14.1 T. C-13 ed ...

Wiley-Blackwell2010

NEURONAL ENRICHED ENDOSOMAL PROTEIN OF 21 kDa COLOCALIZES WITH GLUTAMATE RECEPTOR SUBUNIT GLUR2/3 AT THE POSTSYNAPTIC MEMBRANE

Functional evidence suggests that neuronal enriched endosomal protein of 21 kDa (NEEP21) takes part in facilitating transport of AMPA receptors (AMPAR) in the synapse. To explore the anatomical basis for a role in this synaptic trafficking, we investigated ...

2009

Simultaneous Chemical Recording and Stimulation in the Brain Using an Assembly of Biosensor Silicon Microprobes and SU-8 Microinjectors

Nico de Rooij, Peter Van der Wal, Olivier Frey

In this contribution we present multi-channel microinjector arrays fabricated by a reliable three-layer SU-8 process and assembled with glutamate biosensor microprobes'. It enables local delivery of specific liquids into brain tissue for the stimulation or ...

Elsevier Science, Reg Sales Off, Customer Support Dept, 655 Ave Of The Americas, New York, Ny 10010 Usa2009

Fear conditioning enhances spontaneous AMPA receptor-mediated synaptic transmission in mouse hippocampal CA1 area

Maria del Carmen Sandi Perez, Lisa Conboy

AMPA receptor-mediated synaptic modifications in the amygdala have been reported to sustain cued fear conditioning. However, the hippocampal formation is also critically involved in fear learning. Therefore, we examined whether fear conditioning is also ac ...

Wiley-Blackwell2009

Cellular dynamics explored with digital holographic microscopy

Benjamin Rappaz

Obtaining high resolution 3D quantitative images is critical for elucidating the relationship between cell dynamics and physiological or pathological processes. However the feasibility of such cellular dynamic studies is limited by the resolution of the 3D ...

EPFL2008

Mathematical modeling of (13)C label incorporation of the TCA cycle: the concept of composite precursor function

Rolf Gruetter

A novel approach for the mathematical modeling of (13)C label incorporation into amino acids via the TCA cycle that eliminates the explicit calculation of the labeling of the TCA cycle intermediates is described, resulting in one differential equation per ...

Wiley-Blackwell2007

Elevated NMDA receptor levels and enhanced postsynaptic long-term potentiation induced by prenatal exposure to valproic acid

Henry Markram, Tania Rinaldi, Karina Kulangara

Valproic acid (VPA) is a powerful teratogen causing birth defects in humans, including autism spectrum disorder (ASD), if exposure occurs during the first trimester of embryogenesis. Learning and memory alterations are common symptoms of ASD, but underlyin ...

National Academy of Sciences2007