Differential cellular localization of three splice variants of the mGluR1 metabotropic glutamate receptor in rat cerebellum - PubMed (original) (raw)
Differential cellular localization of three splice variants of the mGluR1 metabotropic glutamate receptor in rat cerebellum
P Grandes et al. Neuroreport. 1994.
Abstract
Antibodies were raised against C-terminal peptides of the splice variants a, b and c of the rat mGluR1 metabotropic glutamate receptor. Affinity purified antibodies each specifically reacting with mGluR1a, mGluR1b and mGluR1c were used to study the cellular localization of these receptors in rat cerebellum. The mGluR1a antibody strongly labelled Purkinje cells at their cells bodies, portions of their dendritic trees and numerous small punctate elements reminiscent of dendritic spines. Also labelled were some stellate, basket, Golgi and Lugaro cells. Granule cells were devoid of staining. The mGluR1b antibody strongly labelled Purkinje cell bodies and their dendrites at levels which varied within the same lobule of the vermis or the hemispheres. No significant labelling was observed at stellate, basket, Golgi and granule cells, while occasionally a fraction of basket cells and cerebellar glomeruli was moderately immunoreactive. The mGluR1c antibody strongly labelled cell bodies and thick principal dendrites of Purkinje cells but not dendritic spines. Immunonegative Purkinje cells were intermingled with strongly labelled ones in lobules 4-10, while in lobules 1, 2 and 3, no stained Purkinje cells were detected. The mGluR1c antibody also labelled stellate, basket, some Golgi and some Lugaro cells as well as granule cells.
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