Sodium-calcium exchanger mediates sensory-evoked glial calcium transients in the developing retinotectal system
Summary: Various types of sensory stimuli have been shown to induce Ca2+ elevations in glia. However, a mechanistic understanding of the signaling pathways mediating sensory-evoked activity in glia in intact animals is still emerging. During early development of the Xenopus laevis visual system, rad...
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doaj-6e545cd321604089b693a19cd5add0432021-10-07T04:24:57ZengElsevierCell Reports2211-12472021-10-01371109791Sodium-calcium exchanger mediates sensory-evoked glial calcium transients in the developing retinotectal systemNicholas J. Benfey0Vanessa J. Li1Anne Schohl2Edward S. Ruthazer3Montreal Neurological Institute-Hospital, Department of Neurology and Neurosurgery, McGill University, Montréal, Québec, H3A 2B4 CanadaMontreal Neurological Institute-Hospital, Department of Neurology and Neurosurgery, McGill University, Montréal, Québec, H3A 2B4 CanadaMontreal Neurological Institute-Hospital, Department of Neurology and Neurosurgery, McGill University, Montréal, Québec, H3A 2B4 CanadaMontreal Neurological Institute-Hospital, Department of Neurology and Neurosurgery, McGill University, Montréal, Québec, H3A 2B4 Canada; Corresponding authorSummary: Various types of sensory stimuli have been shown to induce Ca2+ elevations in glia. However, a mechanistic understanding of the signaling pathways mediating sensory-evoked activity in glia in intact animals is still emerging. During early development of the Xenopus laevis visual system, radial astrocytes in the optic tectum are highly responsive to sensory stimulation. Ca2+ transients occur spontaneously in radial astrocytes at rest and are abolished by silencing neuronal activity with tetrodotoxin. Visual stimulation drives temporally correlated increases in the activity patterns of neighboring radial astrocytes. Following blockade of all glutamate receptors (gluRs), visually evoked Ca2+ activity in radial astrocytes persists, while neuronal activity is suppressed. The additional blockade of either glu transporters or sodium-calcium exchangers (NCX) abolishes visually evoked responses in glia. Finally, we demonstrate that blockade of NCX alone is sufficient to prevent visually evoked responses in radial astrocytes, highlighting a pivotal role for NCX in glia during development.http://www.sciencedirect.com/science/article/pii/S2211124721012511astrocyteradial glianeuron-glia interactionsXenopusglutamate transportercalcium imaging |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Nicholas J. Benfey Vanessa J. Li Anne Schohl Edward S. Ruthazer |
spellingShingle |
Nicholas J. Benfey Vanessa J. Li Anne Schohl Edward S. Ruthazer Sodium-calcium exchanger mediates sensory-evoked glial calcium transients in the developing retinotectal system Cell Reports astrocyte radial glia neuron-glia interactions Xenopus glutamate transporter calcium imaging |
author_facet |
Nicholas J. Benfey Vanessa J. Li Anne Schohl Edward S. Ruthazer |
author_sort |
Nicholas J. Benfey |
title |
Sodium-calcium exchanger mediates sensory-evoked glial calcium transients in the developing retinotectal system |
title_short |
Sodium-calcium exchanger mediates sensory-evoked glial calcium transients in the developing retinotectal system |
title_full |
Sodium-calcium exchanger mediates sensory-evoked glial calcium transients in the developing retinotectal system |
title_fullStr |
Sodium-calcium exchanger mediates sensory-evoked glial calcium transients in the developing retinotectal system |
title_full_unstemmed |
Sodium-calcium exchanger mediates sensory-evoked glial calcium transients in the developing retinotectal system |
title_sort |
sodium-calcium exchanger mediates sensory-evoked glial calcium transients in the developing retinotectal system |
publisher |
Elsevier |
series |
Cell Reports |
issn |
2211-1247 |
publishDate |
2021-10-01 |
description |
Summary: Various types of sensory stimuli have been shown to induce Ca2+ elevations in glia. However, a mechanistic understanding of the signaling pathways mediating sensory-evoked activity in glia in intact animals is still emerging. During early development of the Xenopus laevis visual system, radial astrocytes in the optic tectum are highly responsive to sensory stimulation. Ca2+ transients occur spontaneously in radial astrocytes at rest and are abolished by silencing neuronal activity with tetrodotoxin. Visual stimulation drives temporally correlated increases in the activity patterns of neighboring radial astrocytes. Following blockade of all glutamate receptors (gluRs), visually evoked Ca2+ activity in radial astrocytes persists, while neuronal activity is suppressed. The additional blockade of either glu transporters or sodium-calcium exchangers (NCX) abolishes visually evoked responses in glia. Finally, we demonstrate that blockade of NCX alone is sufficient to prevent visually evoked responses in radial astrocytes, highlighting a pivotal role for NCX in glia during development. |
topic |
astrocyte radial glia neuron-glia interactions Xenopus glutamate transporter calcium imaging |
url |
http://www.sciencedirect.com/science/article/pii/S2211124721012511 |
work_keys_str_mv |
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1716839983395897344 |