Publications associées à Novel treatment for Alzheimer's disease

Neurocognition and NMDAR co-agonists pathways in individuals with treatment resistant first-episode psychosis: a 3-year follow-up longitudinal study

This study aims to determine whether 1) individuals with treatment-resistant schizophrenia display early cognitive impairment compared to treatment-responders and healthy controls and 2) N-methyl-D-aspartate-receptor hypofunction is an underlying mechanism ...

Springernature2024

Wnt5a promotes hippocampal postsynaptic development and GluN2B-induced expression via the eIF2 alpha HRI kinase

Eva Ramos Fernandez

Wnt signaling plays a key role in neurodevelopment and neuronal maturation. Specifically, Wnt5a stimulates postsynaptic assemblies, increases glutamatergic neurotransmission and, through calcium signaling, generates nitric oxide (NO). Trying to unveil the ...

Nature Research2021

Safinamide inhibits in vivo glutamate release in a rat model of Parkinson's disease

Salvatore Novello

To investigate whether the reversible MAO-B inhibitor and sodium channel blocker safinamide impairs glutamate release under parkinsonian conditions in vivo, and this effect is dependent on MAO-B inhibition, safinamide (and rasagiline as a comparator) were ...

PERGAMON-ELSEVIER SCIENCE LTD2020

Synaptic proximity enables NMDAR signalling to promote brain metastasis

Graham Knott, Douglas Hanahan, Mohammad Sadegh Saghafinia, Iacovos Michael, Qiqun Zeng, Brian Donal McCabe, Wei Jiao, Giovanni Ciriello, Peng Zhang, Inti Zlobec

Metastasis-the disseminated growth of tumours in distant organs-underlies cancer mortality. Breast-to-brain metastasis (B2BM) is a common and disruptive form of cancer and is prevalent in the aggressive basal-like subtype, but is also found at varying freq ...

2019

Response Adaptation in Barrel Cortical Neurons Facilitates Stimulus Detection during Rhythmic Whisker Stimulation in Anesthetized Mice

Natali Barros Zulaica

Rodents use rhythmic whisker movements at frequencies between 4 and 12 Hz to sense the environment that will be disturbed when the animal touches an object. The aim of this work is to study the response adaptation to rhythmic whisker stimulation trains at ...

Society for Neuroscience2019

Dual action of L-Lactate on the activity of NR2B-containing NMDA receptors: from potentiation to neuroprotection

Pierre Marquet, Pierre Magistretti, Pascal Jourdain, Igor Allaman, Kaspar Rothenfusser

L-Lactate is a positive modulator of NMDAR-mediated signaling resulting in plasticity gene induction and memory consolidation. However, L-Lactate is also able to protect neurons against excito-toxic NMDAR activity, an indication of a mitigating action of L ...

Nature Research2018

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

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

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

Inhaling xenon ameliorates l -dopa-induced dyskinesia in experimental parkinsonism

Tomislav Milekovic, Grégoire Courtine, Eduardo Martin Moraud, Shiqi Sun

Parkinson's disease motor symptoms are treated with levodopa, but long‐term treatment leads to disabling dyskinesia. Altered synaptic transmission and maladaptive plasticity of corticostriatal glutamatergic projections play a critical role in the pathophys ...

2018

Cortical afferents onto the nucleus Reticularis thalami promote plasticity of low-threshold excitability through GluN2C-NMDARs

Gil Vantomme, Simone Astori

Thalamus and cortex represent a highly integrated processing unit that elaborates sensory representations. Interposed between cortex and thalamus, the nucleus Reticularis thalami (nRt) receives strong cortical glutamatergic input and mediates top-down inhi ...

Nature Research2017

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

Subunit-selective N-Methyl-D-aspartate (NMDA) Receptor Signaling through Brefeldin A-resistant Arf Guanine Nucleotide Exchange Factors BRAG1 and BRAG2 during Synapse Maturation

Michael Kintscher

The maturation of glutamatergic synapses in the CNS is regulated by NMDA receptors (NMDARs) that gradually change from a GluN2B- to a GluN2A-dominated subunit composition during postnatal development. Here we show that NMDARs control the activity of the sm ...

Amer Soc Biochemistry Molecular Biology Inc2016

Single-molecule microscopy to study plasma membrane receptor dynamics

Luc Veya

Cell surface receptors allowthe cell to sense and respond to external signals. Receptor malfunctions are associated with many diseases. The diffusional behavior of receptors is of particular interest to understand how the cell modulates receptor function i ...

EPFL2016

Channel-Mediated Lactate Release by K+-Stimulated Astrocytes

Patrick Aebischer, Sylvain Eric Lengacher, Pierre Magistretti, Bernard Schneider

Excitatory synaptic transmission is accompanied by a local surge in interstitial lactate that occurs despite adequate oxygen availability, a puzzling phenomenon termed aerobic glycolysis. In addition to its role as an energy substrate, recent studies have ...

Society for Neuroscience2015

Lactate promotes plasticity gene expression by potentiating NMDA signaling in neurons

Pierre Magistretti, Pascal Jourdain, Igor Allaman, Jean-Marie Petit, Gabriele Grenningloh, Evelyne Ruchti, Jiangyan Yang

L-lactate is a product of aerobic glycolysis that can be used by neurons as an energy substrate. Here we report that in neurons L-lactate stimulates the expression of synaptic plasticity-related genes such as Arc, c-Fos, and Zif268 through a mechanism invo ...

National Academy of Sciences2014

Role for MMP-9 in stress-induced downregulation of nectin-3 in hippocampal CA1 and associated behavioural alterations

Maria del Carmen Sandi Perez, Martina Fantin, Olivia Zanoletti, Jocelin Grosse, Michael van der Kooij, Céline Fournier

Chronic stress is a risk factor for the development of psychopathologies characterized by cognitive dysfunction and deregulated social behaviours. Emerging evidence suggests a role for cell adhesion molecules, including nectin-3, in the mechanisms that un ...

Nature Research2014

Hijacking the Neuronal NMDAR Signaling Circuit to Promote Tumor Growth and Invasion

Douglas Hanahan, Leanne Li

Glutamate and its receptor N-methyl-D-aspartate receptor (NMDAR) have been associated with cancer, although their functions are not fully understood. Herein, we implicate glutamate-driven NMDAR signaling in a mouse model of pancreatic neuroendocrine tumori ...

Cell Press2013

Large scale expression and purification of the mouse 5-HT3 receptor

Horst Vogel, Cédric Deluz, Menno Berend Tol, Ghérici Hassaïne

Receptors of the Cys-loop family are central to neurotransmission and primary therapeutic targets. In order to decipher their gating and modulation mechanisms, structural data is essential. However, structural studies require large amounts of pure, functio ...

Elsevier Science Bv2013

Characterization and Validation of Fluorescent Receptor Ligands: A Case Study of the Ionotropic Serotonin Receptor

Rudolf Hovius

The application of fluorescent receptor ligands has become widespread, incited by two important reasons. “Seeing is believing”—it is possible to visualize in real time in live cells ligand–receptor interactions, and to locate the receptors with subcellular ...

2013

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

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

Long-Term Depression at Parallel Fiber to Golgi Cell Synapses

Michele Giugliano

Robberechts Q, Wijnants M, Giugliano M, De Schutter E. Longterm depression at parallel fiber to Golgi cell synapses. J Neurophysiol 104: 3413-3423, 2010. First published September 22, 2010; doi:10.1152/jn.00030.2010. Golgi cells (GoCs) are the primary inhi ...

2010