Differences in Ca(2+) permeability of AMPA-type glutamate receptor channels in neocortical neurons caused by differential GluR-B subunit expression

P.M. Jonas, C. Racca, B. Sakmann, P. Seeburg, H. Monyer, Neuron 12 (1994) 1281–1289.

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Abstract
Fast excitatory synaptic transmission in the CNS is mediated by AMPA-type glutamate receptor (GluR) channels. Heterologous expression suggested that the Ca2+ permeability of these receptors critically depends on the subunit composition. Using patch-clamp techniques in brain slices, we found that the Ca2+ permeability of native AMPA-type GluRs was markedly higher in nonpyramidal (P(Ca)/P(K) ≃ 0.63) than in pyramidal (P(Ca)/P(K) ≃ 0.05) neurons of rat neocortex. Analysis of mRNA in single cells indicated that the relative abundance of GluR-B-specific mRNA was significantly lower in nonpyramidal (GluR-B/GluR-non-B ≃ 0.3) than in pyramidal (GluR-B/GluR-non-B ≃ 3) cells. This suggests that differences in relative abundance of GluR-B- specific mRNA generate functional diversity of AMPA-type GluRs in neurons with respect to Ca2+ permeability.
Publishing Year
Date Published
1994-06-01
Journal Title
Neuron
Volume
12
Issue
6
Page
1281 - 1289
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Jonas PM, Racca C, Sakmann B, Seeburg P, Monyer H. Differences in Ca(2+) permeability of AMPA-type glutamate receptor channels in neocortical neurons caused by differential GluR-B subunit expression. Neuron. 1994;12(6):1281-1289. doi:10.1016/0896-6273(94)90444-8
Jonas, P. M., Racca, C., Sakmann, B., Seeburg, P., & Monyer, H. (1994). Differences in Ca(2+) permeability of AMPA-type glutamate receptor channels in neocortical neurons caused by differential GluR-B subunit expression. Neuron, 12(6), 1281–1289. https://doi.org/10.1016/0896-6273(94)90444-8
Jonas, Peter M, Claudia Racca, Bert Sakmann, Peter Seeburg, and Hannah Monyer. “Differences in Ca(2+) Permeability of AMPA-Type Glutamate Receptor Channels in Neocortical Neurons Caused by Differential GluR-B Subunit Expression.” Neuron 12, no. 6 (1994): 1281–89. https://doi.org/10.1016/0896-6273(94)90444-8.
P. M. Jonas, C. Racca, B. Sakmann, P. Seeburg, and H. Monyer, “Differences in Ca(2+) permeability of AMPA-type glutamate receptor channels in neocortical neurons caused by differential GluR-B subunit expression,” Neuron, vol. 12, no. 6, pp. 1281–1289, 1994.
Jonas PM, Racca C, Sakmann B, Seeburg P, Monyer H. 1994. Differences in Ca(2+) permeability of AMPA-type glutamate receptor channels in neocortical neurons caused by differential GluR-B subunit expression. Neuron. 12(6), 1281–1289.
Jonas, Peter M., et al. “Differences in Ca(2+) Permeability of AMPA-Type Glutamate Receptor Channels in Neocortical Neurons Caused by Differential GluR-B Subunit Expression.” Neuron, vol. 12, no. 6, Elsevier, 1994, pp. 1281–89, doi:10.1016/0896-6273(94)90444-8.

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