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European journal of pharmacology

Riluzole enhances the activity of glutamate transporters GLAST, GLT1 and EAAC1.


PMID 18036519

Abstract

Riluzole exerts a neuroprotective effect through different mechanisms, including action on glutamatergic transmission. We investigated whether this drug affects glutamate transporter-mediated uptake, using clonal cell lines stably expressing the rat glutamate transporters GLAST, GLT1 or EAAC1. We found that riluzole significantly increased glutamate uptake in a dose-dependent manner; kinetic analysis indicated that the apparent affinity of glutamate for the transporters was significantly increased, with similar effects in the three cell lines. This may facilitate the buffering of excessive extracellular glutamate under pathological conditions suggesting that riluzole's neuroprotective action might be partly mediated by its activating effect on glutamate uptake.

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