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FEBS Letters
Article . 2002 . Peer-reviewed
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FEBS Letters
Article . 2002
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Cytoskeleton‐related trafficking of the EAAC1 glutamate transporter after activation of the Gq/11‐coupled neurotensin receptor NTS1

Authors: Najimi, Mustapha; Maloteaux, Jean-Marie; Hermans, Emmanuel;

Cytoskeleton‐related trafficking of the EAAC1 glutamate transporter after activation of the Gq/11‐coupled neurotensin receptor NTS1

Abstract

The possible modulation of the glutamate transporter EAAC1 by a class A G protein‐coupled receptor was studied in transfected C6 glioma cells stably expressing the high‐affinity neurotensin receptor NTS1. Brief exposure (5 min) to neurotensin increased Na+‐dependent D‐[3H]aspartate uptake by about 70%. The effect of neurotensin was found to result from an increase in cell surface expression of EAAC1 and accordingly, cytochalasin D and colchicine were shown to block the effect of neurotensin on aspartate uptake, suggesting that the cytoskeleton participates in this regulation. Neither protein kinase C nor phosphatidylinositol 3‐kinase activities, two intracellular signaling pathways known to modulate EAAC1, was required for EAAC1‐mediated aspartate transport regulation by neurotensin. Together, these results provide evidence for an acute regulation of EAAC1 trafficking after activation of a G protein‐coupled receptor.

Related Organizations
Keywords

Aspartic Acid, Trafficking, Symporters, Amino Acid Transport System X-AG, Receptors, Cell Surface, Glioma, Heterotrimeric GTP-Binding Proteins, Rats, Glutamate Plasma Membrane Transport Proteins, Protein Transport, Excitatory Amino Acid Transporter 3, EAAC1, Phospholipase C, Tumor Cells, Cultured, Animals, GTP-Binding Protein alpha Subunits, Gq-G11, Receptors, Neurotensin, G protein-coupled receptor, Carrier Proteins, Cytoskeleton, Neurotensin, Signal Transduction

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    33
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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    Top 10%
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
33
Average
Top 10%
Top 10%
bronze