Abstract
The biochemical and functional characteristics of the AMPA subtype of the glutamate receptors expressed by pyramidal and non-pyramidal neurons of the neocortex have been studied in acute slices by means of single-cell RT-PCR and fast applications of glutamate on outside-out patches. Our results suggest that the predominant expression of the flop splice variants of the GluR1-4 AMPA subunits contributes to the faster desensitization of these receptors in non-pyramidal neurons compared to pyramidal cells where flip variants of GluR1-4 are dominant. Alternative splicing of AMPA receptors may therefore play an important role in regulating synaptic function in a cell-type specific manner.
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