Cerebellar granule cells in primary culture express receptors for excitatory amino acids. The activation of these receptors results in an increased uptake of Ca2+, however, the effects are different depending on the agonists used. Aspartate, NMDA and ibotenate are active only in depolarized conditions, whereas kainate and glutamate activate Ca2+ uptake independently from depolarization. The results indicate the presence of two receptor types: kainate recognition site coupled with voltage-independent Ca2+ channels and NMDA recognition site coupled with voltage-dependent Ca2+ channels.
ASJC Scopus subject areas
- Cellular and Molecular Neuroscience
- Drug Discovery