期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：1978
卷号：75
期号：6
页码：2977-2980
DOI：10.1073/pnas.75.6.2977
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：This study utilizes tritiated muscimol binding and electron microscope autoradiography (Ilford L4 emulsion and phenidone development) to localize {gamma}-aminobutyric acid (GABA) receptor sites in the cerebellum of the rat. In the cerebellar cortex, silver grains were associated with somata and dendrites of basket and stellate cells in the molecular layer, with somata and primary and secondary dendritic shafts of Purkinje cells, axons and terminals of basket cells in the pinceau or basket, initial axonal segments and myelinated axons of Purkinje cells, and dendrites of granule and Golgi cells in the granular layer, and with somata and dendritic shafts of large and small cells in the cerebellar nuclei. These data correspond well to the light-microscope-autoradiographic observations in the cerebellum previously reported [Chan-Palay, V. (1978) Proc. Natl. Acad. Sci. 75, 1024-1028]. Label over GABA receptor sites can be localized to the plasma membranes between pre- and postsynaptic elements at synaptic junctions, of which 88.9% of the samples are axodendritic and the remaining 11.1% are axosomatic. GABA receptor sites are also found along axonal membranes of the GABA-containing basket cell within the basket surrounding Purkinje cells, where true axo-axonal synapses are rare. It is speculated that GABA receptors in the basket may suggest a possibility of the basis for synchronization, either self-inhibition or facilitation within the basket formation, or presynaptic suppression of inhibitory action of basket cell on Purkinje cell.
关键词：cerebellar cortex ; nuclei ; electron microscope autoradiography
