Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/49045
Title: Extrasynaptic neurotransmission in the modulation of brain function. Focus on the striatal neuronal glial networks
Author: Fuxe, Kjell
Borroto Escuela, Dasiel O.
Romero Fernández, Wilber
Diaz Cabiale, Zaida
Rivera, Alícia
Ferraro, Luca
Tanganelli, Sergio
Tarakanov, Alexander O.
Garriga, Pere
Narváez, José A.
Ciruela Alférez, Francisco
Guescini, Michele
Agnati, Luigi F.
Keywords: Cervell
Proteïnes G
Neurotransmissió
Brain
G Proteins
Neural transmission
Issue Date: 4-Jun-2012
Publisher: Frontiers Media
Abstract: Extrasynaptic neurotransmission is an important short distance form of volume transmission (VT) and describes the extracellular diffusion of transmitters and modulators after synaptic spillover or extrasynaptic release in the local circuit regions binding to and activating mainly extrasynaptic neuronal and glial receptors in the neuroglial networks of the brain. Receptor-receptor interactions in G protein-coupled receptor (GPCR) heteromers play a major role, on dendritic spines and nerve terminals including glutamate synapses, in the integrative processes of the extrasynaptic signaling. Heteromeric complexes between GPCR and ion-channel receptors play a special role in the integration of the synaptic and extrasynaptic signals. Changes in extracellular concentrations of the classical synaptic neurotransmitters glutamate and GABA found with microdialysis is likely an expression of the activity of the neuron-astrocyte unit of the brain and can be used as an index of VT-mediated actions of these two neurotransmitters in the brain. Thus, the activity of neurons may be functionally linked to the activity of astrocytes, which may release glutamate and GABA to the extracellular space where extrasynaptic glutamate and GABA receptors do exist. Wiring transmission (WT) and VT are fundamental properties of all neurons of the CNS but the balance between WT and VT varies from one nerve cell population to the other. The focus is on the striatal cellular networks, and the WT and VT and their integration via receptor heteromers are described in the GABA projection neurons, the glutamate, dopamine, 5-hydroxytryptamine (5-HT) and histamine striatal afferents, the cholinergic interneurons, and different types of GABA interneurons. In addition, the role in these networks of VT signaling of the energy-dependent modulator adenosine and of endocannabinoids mainly formed in the striatal projection neurons will be underlined to understand the communication in the striatal cellular networks
Note: Reproducció del document publicat a: http://dx.doi.org/10.3389/fphys.2012.00136
It is part of: Frontiers in Physiology , 2012, vol. 3, p. 1-17
Related resource: http://dx.doi.org/10.3389/fphys.2012.00136
URI: http://hdl.handle.net/2445/49045
ISSN: 1664-042X
Appears in Collections:Articles publicats en revistes (Patologia i Terapèutica Experimental)

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