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• W2023127965 abstract "Cajal-Retzius cells are thought to play an important role for cortical development, and receive primarily spontaneous GABAergic input mediated by GABAA receptors. However, neither the effects of synaptically-released GABA on their excitability nor the cellular source(s) of spontaneous GABAergic currents have been yet determined. By directly recording electrophysiological responses from identified Cajal-Retzius cells of the CXCR4-EGFP mouse, we show that GABAergic input can trigger supra-threshold responses, and that the pharmacological activation of mGlu1α receptors with the group I agonist DHPG powerfully increases the frequency of spontaneous GABAergic currents. These effects appeared mediated by a network mechanism, because responses to DHPG were completely prevented both by surgical disconnection of layer I from lower layers and by exposure of slices to TTX. We propose that the cellular source underlying the observed effect of DHPG are layer I-targeting Martinotti-like interneurons, which we show express functional group I mGluRs and respond to DHPG with supra-threshold depolarization already at early developmental stages. In conclusion, our work suggests that conditions of enhanced glutamate release may be critical at early developmental stages for the recruitment of an mGlu1α-dependent micro-circuit, which then leads to the activation of Cajal-Retzius cells." @default.
• W2023127965 created "2016-06-24" @default.
• W2023127965 creator A5027613575 @default.
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• W2023127965 date "2012-09-01" @default.
• W2023127965 modified "2023-10-14" @default.
• W2023127965 title "mGlu1α-dependent recruitment of excitatory GABAergic input to neocortical Cajal-Retzius cells" @default.
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• W2023127965 doi "https://doi.org/10.1016/j.neuropharm.2012.04.025" @default.
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