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Fragioudaki, K. et al.

AMPA receptor subunit RNA transcripts and [(3)H]AMPA binding in the cerebellum of normal and pcd mutant mice: an in situ hybridization study combined with receptor autoradiography.

The expression of AMPA receptor subunit mRNAs and the binding of [(3)H]AMPA were studied in the cerebellum of normal and "Purkinje cell degeneration" ( pcd) mutant mouse. In the pcd cerebellum, [(3)H]AMPA binding was decreased significantly in both the molecular and granule cell layers by 63% and 36%, respectively. In those mutants, GluRA, GluRB and GluRC mRNAs were not detected in the Purkinje cell layer, and the levels of GluRB and GluRD mRNAs were significantly decreased in the granule cell layer by 16% and 57%, respectively. Cerebellar grafts transplanted into the pcd cerebellum expressed only GluRB and GluRC mRNAs, suggesting that donor cells express the appropriate subunits normally expressed by Purkinje neurons. Our results, firstly, support the idea that the expression of the GluRA subunit in Golgi epithelial cells may depend upon the sustained interaction with adjacent Purkinje cells, and secondly, suggest that granule cells which are more resistant to transsynaptic death may express higher levels of GluRB mRNA.[1]

References

AMPA receptor subunit RNA transcripts and [(3)H]AMPA binding in the cerebellum of normal and pcd mutant mice: an in situ hybridization study combined with receptor autoradiography. Fragioudaki, K., Giompres, P., Smith, A.L., Triarhou, L.C., Kouvelas, E.D., Mitsacos, A. Journal of neural transmission (Vienna, Austria : 1996) (2002) [Pubmed]

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