Concept

Gliotransmitter

Publications associées (32)

Astrocyte-neuron metabolic relationships: for better and for worse

In recent years, previously unsuspected roles of astrocytes have been revealed, largely owing to the development of new tools enabling their selective study in situ. These exciting findings add to the large body of evidence demonstrating that astrocytes pl ...

Elsevier2011

A limited contribution of Ca2+ current facilitation to paired-pulse facilitation of transmitter release at the rat calyx of Held

Ralf Schneggenburger, Martin Guillermo Mueller

Recent studies have suggested that transmitter release facilitation at synapses is largely mediated by presynaptic Ca2+ current facilitation, but the exact contribution of Ca2+ current facilitation has not been determined quantitatively. Here, we determine ...

2008

Modulation of astrocytic metabolic phenotype by proinflammatory cytokines

Pierre Magistretti, Igor Allaman

Astrocytes play an important role in nervous system homeostasis. In particular, they contribute to the regulation of local energy metabolism and to oxidative stress defence. In previous experiments, we showed that long-term treatment with interleukin 1alph ...

2008

Selective postsynaptic co-localization of MCT2 with AMPA receptor GluR2/3 subunits at excitatory synapses exhibiting AMPA receptor trafficking

Pierre Magistretti, Luc Pellerin

MCT2 is the main neuronal monocarboxylate transporter needed by neurons if they are to use lactate as an additional energy substrate. Previous evidence suggested that some MCT2 could be located in postsynaptic elements of glutamatergic synapses. Using post ...

2005

Structural basis and biophysical properties of synaptic plasticity studied by atomic force microscopy

Alexandre Yersin

In this thesis, we studied two systems important for synaptic plasticity, one presynaptic and another postsynaptic. The protein complex composed of VAMP 2, SNAP-25 and syntaxin 1 (SNARE complex) is essential for docking and fusion of neurotransmitter-fille ...

EPFL2004

GABA uptake into astrocytes is not associated with significant metabolic cost: implications for brain imaging of inhibitory transmission

Pierre Magistretti, Luc Pellerin, Jean-Yves Chatton

Synaptically released glutamate has been identified as a signal coupling excitatory neuronal activity to increased glucose utilization. The proposed mechanism of this coupling involves glutamate uptake into astrocytes resulting in increased intracellular N ...

2003

The tripartite synapse: glia in synaptic transmission

Pierre Magistretti, Andrea Volterra

For decades glial cells were considered relatively passive supporters of nerve function. It was accepted that they had important roles to play in the structural, metabolic and trophic support of neurons; however, it is now also known that glial cells are a ...

Oxford University Press2002

VIP and PACAP in the CNS: regulators of glial energy metabolism and modulators of glutamatergic signaling

Pierre Magistretti, Jean-Luc Martin, Jean-René Cardinaux

VIP neurons are a homogeneous population of intracortical bipolar cells. They receive excitatory synapses from afferent circuits to the cortex and exert effects on neurons, astrocytes, and capillaries. Effects on the two latter cell types imply that VIP ne ...

The New York Academy of Sciences1998

beta-Adrenergic stimulation promotes homocysteic acid release from astrocyte cultures: evidence for a role of astrocytes in the modulation of synaptic transmission

Pierre Magistretti, Luc Pellerin

The sulfur-containing amino acid homocysteic acid (HCA) is present in and released from nervous tissue, exerting excitatory effects on neurons by predominantly activating NMDA receptors. It is interesting that HCA appears to be exclusively localized in gli ...

1997

Noradrenaline increases K-conductance and reduces glutamatergic transmission in the mouse entorhinal cortex by activation of alpha 2-adrenoreceptors

Pierre Magistretti, Emilie Pralong

The entorhinal cortex is a gateway to the hippocampus; it receives inputs from several cortical associative areas as well as subcortical areas. Since there is evidence showing that noradrenaline reduces the epileptic activity generated in the entorhinal co ...

1995

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