Afferent convergence to a shared population of interneuron AMPA receptors.
Afferent convergence to a shared population of interneuron AMPA receptors.
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DOI:
10.1038/s41467-023-38854-2
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发表时间:
2023-05-30
影响因子:
16.6
通讯作者:
Wadiche, Jacques I.
中科院分区:
文献类型:
--
作者:
Pennock, Reagan L.;Coddington, Luke T.;Yan, Xiaohui;Overstreet-Wadiche, Linda;Wadiche, Jacques I.
Precise alignment of pre- and postsynaptic elements optimizes the activation of glutamate receptors at excitatory synapses. Nonetheless, glutamate that diffuses out of the synaptic cleft can have actions at distant receptors, a mode of transmission called spillover. To uncover the extrasynaptic actions of glutamate, we localized AMPA receptors (AMPARs) mediating spillover transmission between climbing fibers and molecular layer interneurons in the cerebellar cortex. We found that climbing fiber spillover generates calcium transients mediated by Ca2+-permeable AMPARs at parallel fiber synapses. Spillover occludes parallel fiber synaptic currents, indicating that separate, independently regulated afferent pathways converge onto a common pool of AMPARs. Together these findings demonstrate a circuit motif wherein glutamate ‘spill-in’ from an unconnected afferent pathway co-opts synaptic receptors, allowing activation of postsynaptic AMPARs even when canonical glutamate release is suppressed. Glutamate that diffuses out of the synaptic cleft can have actions at distant receptors, a mode of transmission called spillover. Here, the authors find in the cerebellar cortex that glutamate spillover from climbing fibers activates synaptic AMPA receptors of molecular layer interneurons, allowing glutamate from an unconnected pathway to co-opt postsynaptic receptors.
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DOI:
10.1002/syn.22027
发表时间:
2018-05
期刊:
Synapse (New York, N.Y.)
影响因子:
--
作者:
Orts-Del'Immagine A;Pugh JR
通讯作者:
Pugh JR
影响因子:
8.8
作者:
Arlt, Charlotte;Hausser, Michael
通讯作者:
Hausser, Michael
影响因子:
5.3
作者:
Carter, AG;Regehr, WG
通讯作者:
Regehr, WG
影响因子:
25
作者:
Arnth-Jensen, N;Jabaudon, D;Scanziani, M
通讯作者:
Scanziani, M
影响因子:
16.2
作者:
Coddington LT;Rudolph S;Vande Lune P;Overstreet-Wadiche L;Wadiche JI
通讯作者:
Wadiche JI