Synaptic and Non-synaptic AMPA Receptors Permeable to Calcium

For a long time, alpha-amino-3-hydroxy-5-methyl-4-isoxazole-propionate (AMPA) receptors permeable to calcium have been considered to be either non-existent or as “atypical”. There is now ample evidence that these receptors exist in numerous regions of the nervous system and in many neuronal as well...

Full description

Saved in:
Bibliographic Details
Published in:Japanese Journal of Pharmacology 2001, Vol.86(1), pp.1-17
Main Authors: König, Norbert, Poluch, Sylvie, Estabel, Jeanne, Durand, Micheline, Drian, Marie-Jeanne, Exbrayat, Jean-Marie
Format: Article
Language:English
Subjects:
Adult neurogenesis
Animals
Calcium - metabolism
Cell death
Cobalt
Humans
Migration
Paracrine action
Receptors, AMPA - metabolism
Receptors, AMPA - physiology
Receptors, Neurotransmitter - metabolism
Receptors, Neurotransmitter - physiology
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:For a long time, alpha-amino-3-hydroxy-5-methyl-4-isoxazole-propionate (AMPA) receptors permeable to calcium have been considered to be either non-existent or as “atypical”. There is now ample evidence that these receptors exist in numerous regions of the nervous system and in many neuronal as well as non-neuronal cell populations. This evidence has been accumulated by several methods, including electro-physiological recording, calcium imaging and cobalt-loading. Functional AMPA receptors permeable to calcium are already expressed at very early stages of embryonic development, well before the onset of synaptogenesis. They are probably involved in the paracrine signaling necessary for construction of the nervous system before becoming involved in synaptic transmission. In immature cells, cyclothiazide strongly increases the steady-state level of responses not only to AMPA, but also to kainate. Ingestion, during pregnancy, of food or drug substances that can cross the placental barrier and act upon the embryonic receptors may constitute a risk for normal development. In the adult nervous system, synaptic as well as non-synaptic (paracrine) AMPA receptors permeable to calcium are probably widely expressed in both glial and neuronal cells. They may also participate in controlling some aspects related to adult neurogenesis, in particular the migration of newly formed neurons.
ISSN:0021-5198
1347-3506
DOI:10.1254/jjp.86.1