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Heuss, C; Scanziani, M; Gähwiler, B H; Gerber, U (1999). G-protein-independent signaling mediated by metabotropic glutamate receptors. Nature Neuroscience, 2(12):1070-1077.

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Abstract

Synaptically released glutamate activates ionotropic and metabotropic receptors at central synapses. Metabotropic glutamate receptors (mGluRs) are thought to modulate membrane conductances through transduction cascades involving G proteins. Here we show, in CA3 pyramidal cells from rat hippocampus, that synaptic activation of type 1 mGluRs by mossy fiber stimulation evokes an excitatory postsynaptic response independent of G-protein function, while inhibiting an afterhyperpolarization current through a G-protein-coupled mechanism. Experiments using peptide activators and specific inhibitors identified a Src-family protein tyrosine kinase as a component of the G-protein-independent transduction pathway. These results represent the first functional evidence for a dual signaling mechanism associated with a heptahelical receptor such as mGluR1, in which intracellular transduction involves activation of either G proteins or tyrosine kinases.

Item Type:Journal Article, refereed
Communities & Collections:04 Faculty of Medicine > Brain Research Institute
DDC:570 Life sciences; biology
610 Medicine & health
Language:English
Date:1999
Deposited On:11 Feb 2008 12:13
Last Modified:27 Nov 2013 23:06
Publisher:Nature Publishing Group
ISSN:1097-6256
Publisher DOI:10.1038/15996
PubMed ID:10570483
Citations:Web of Science®. Times Cited: 113
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Scopus®. Citation Count: 118

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