PMID: 6167324Jul 6, 1981Paper

Localization of high affinity [3H]glycine transport sites in the cerebellar cortex

Brain Research
G P WilkinA L Johnson

Abstract

A study was made of [3H]glycine uptake sites in a preparation greatly enriched in large pieces of the cerebellar glomeruli (glomerulus particles) and in morphologically well preserved slices of rat cerebellum. Electron microscopic autoradiography revealed that of the neurones in the cerebellar cortex only Golgi cells transported [3H]glycine at the low concentration used. Glial cells also took up [3H]glycine but to a lesser extent than the Golgi neurons. It was also confirmed that under comparable conditions Golgi cells transport [3H]GABA. Kinetic studies utilizing the Golgi axon terminal-containing glomerulus particles showed that glycine is a weak non-competitive inhibitor of [3H]GABA uptake (Ki over 600 microM vs the Kt of about 20 microM) and that GABA is an even weaker inhibitor of [3H]glycine uptake. These observations indicated that glycine and GABA do not share the same carrier. Quantitative electron microscopic autoradiography showed that the uptake of the two amino acids, in terms of the unit area of labelled Golgi axon terminals, was not additive. In contrast, their uptake in terms of unit protein was strictly additive. These observations, the first relating to unit volume and the latter to the total volume of Golgi t...Continue Reading

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Citations

Feb 1, 1993·Journal of Neurocytology·S Chen, D E Hillman
Jul 9, 1990·Brain Research·R B Illing
Jul 1, 1990·Brain Research. Developmental Brain Research·M A Cambray-DeakinR D Burgoyne
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May 30, 2020·Neuroscience·Taisuke MiyazakiMasahiko Watanabe
Sep 16, 1985·Brain Research·G Garthwaite, J Garthwaite
Feb 15, 1993·The Journal of Comparative Neurology·S de LacalleC B Saper

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