Postsynaptic spiking determines anti-Hebbian LTD in visual cortex basket cells
Long-term plasticity at pyramidal cell to basket cell (PC → BC) synapses is important for the functioning of cortical microcircuits. It is well known that at neocortical PC → PC synapses, dendritic calcium (Ca2+) dynamics signal coincident pre-and postsynaptic spiking which in turn triggers long-ter...
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| Format: | Article |
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Frontiers Media S.A.
2025-02-01
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| Series: | Frontiers in Synaptic Neuroscience |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fnsyn.2025.1548563/full |
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| author | Christina Y. C. Chou Christina Y. C. Chou Wouter J. Droogers Txomin Lalanne Txomin Lalanne Eric Fineberg Tal Klimenko Hannah Owens P. Jesper Sjöström |
| author_facet | Christina Y. C. Chou Christina Y. C. Chou Wouter J. Droogers Txomin Lalanne Txomin Lalanne Eric Fineberg Tal Klimenko Hannah Owens P. Jesper Sjöström |
| author_sort | Christina Y. C. Chou |
| collection | DOAJ |
| description | Long-term plasticity at pyramidal cell to basket cell (PC → BC) synapses is important for the functioning of cortical microcircuits. It is well known that at neocortical PC → PC synapses, dendritic calcium (Ca2+) dynamics signal coincident pre-and postsynaptic spiking which in turn triggers long-term potentiation (LTP). However, the link between dendritic Ca2+ dynamics and long-term plasticity at PC → BC synapses of primary visual cortex (V1) is not as well known. Here, we explored if PC → BC synaptic plasticity in developing V1 is sensitive to postsynaptic spiking. Two-photon (2P) Ca2+ imaging revealed that action potentials (APs) in dendrites of V1 layer-5 (L5) BCs back-propagated decrementally but actively to the location of PC → BC putative synaptic contacts. Pairing excitatory inputs with postsynaptic APs elicited dendritic Ca2+ supralinearities for pre-before-postsynaptic but not post-before-presynaptic temporal ordering, suggesting that APs could impact synaptic plasticity. In agreement, extracellular stimulation as well as high-throughput 2P optogenetic mapping of plasticity both revealed that pre-before-postsynaptic but not post-before-presynaptic pairing resulted in anti-Hebbian long-term depression (LTD). Our results demonstrate that V1 BC dendritic Ca2+ nonlinearities and synaptic plasticity at PC → BC connections are both sensitive to somatic spiking. |
| format | Article |
| id | doaj-art-d1d97c0d33b64677b4b13a64645a6f4e |
| institution | DOAJ |
| issn | 1663-3563 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Synaptic Neuroscience |
| spelling | doaj-art-d1d97c0d33b64677b4b13a64645a6f4e2025-08-20T02:48:23ZengFrontiers Media S.A.Frontiers in Synaptic Neuroscience1663-35632025-02-011710.3389/fnsyn.2025.15485631548563Postsynaptic spiking determines anti-Hebbian LTD in visual cortex basket cellsChristina Y. C. Chou0Christina Y. C. Chou1Wouter J. Droogers2Txomin Lalanne3Txomin Lalanne4Eric Fineberg5Tal Klimenko6Hannah Owens7P. Jesper Sjöström8Centre for Research in Neuroscience, BRaIN Program, Department of Neurology and Neurosurgery, Research Institute of the McGill University Health Centre, Montreal General Hospital, Montreal, QC, CanadaIntegrated Program in Neuroscience, McGill University, Montreal, QC, CanadaCentre for Research in Neuroscience, BRaIN Program, Department of Neurology and Neurosurgery, Research Institute of the McGill University Health Centre, Montreal General Hospital, Montreal, QC, CanadaCentre for Research in Neuroscience, BRaIN Program, Department of Neurology and Neurosurgery, Research Institute of the McGill University Health Centre, Montreal General Hospital, Montreal, QC, CanadaEphyX Neuroscience, Bordeaux, FranceCentre for Research in Neuroscience, BRaIN Program, Department of Neurology and Neurosurgery, Research Institute of the McGill University Health Centre, Montreal General Hospital, Montreal, QC, CanadaCentre for Research in Neuroscience, BRaIN Program, Department of Neurology and Neurosurgery, Research Institute of the McGill University Health Centre, Montreal General Hospital, Montreal, QC, CanadaCentre for Research in Neuroscience, BRaIN Program, Department of Neurology and Neurosurgery, Research Institute of the McGill University Health Centre, Montreal General Hospital, Montreal, QC, CanadaCentre for Research in Neuroscience, BRaIN Program, Department of Neurology and Neurosurgery, Research Institute of the McGill University Health Centre, Montreal General Hospital, Montreal, QC, CanadaLong-term plasticity at pyramidal cell to basket cell (PC → BC) synapses is important for the functioning of cortical microcircuits. It is well known that at neocortical PC → PC synapses, dendritic calcium (Ca2+) dynamics signal coincident pre-and postsynaptic spiking which in turn triggers long-term potentiation (LTP). However, the link between dendritic Ca2+ dynamics and long-term plasticity at PC → BC synapses of primary visual cortex (V1) is not as well known. Here, we explored if PC → BC synaptic plasticity in developing V1 is sensitive to postsynaptic spiking. Two-photon (2P) Ca2+ imaging revealed that action potentials (APs) in dendrites of V1 layer-5 (L5) BCs back-propagated decrementally but actively to the location of PC → BC putative synaptic contacts. Pairing excitatory inputs with postsynaptic APs elicited dendritic Ca2+ supralinearities for pre-before-postsynaptic but not post-before-presynaptic temporal ordering, suggesting that APs could impact synaptic plasticity. In agreement, extracellular stimulation as well as high-throughput 2P optogenetic mapping of plasticity both revealed that pre-before-postsynaptic but not post-before-presynaptic pairing resulted in anti-Hebbian long-term depression (LTD). Our results demonstrate that V1 BC dendritic Ca2+ nonlinearities and synaptic plasticity at PC → BC connections are both sensitive to somatic spiking.https://www.frontiersin.org/articles/10.3389/fnsyn.2025.1548563/fullinhibitory interneuronsplasticitysynapsespike-timing dependent plasticityvisual cortexaction potential backpropagation |
| spellingShingle | Christina Y. C. Chou Christina Y. C. Chou Wouter J. Droogers Txomin Lalanne Txomin Lalanne Eric Fineberg Tal Klimenko Hannah Owens P. Jesper Sjöström Postsynaptic spiking determines anti-Hebbian LTD in visual cortex basket cells Frontiers in Synaptic Neuroscience inhibitory interneurons plasticity synapse spike-timing dependent plasticity visual cortex action potential backpropagation |
| title | Postsynaptic spiking determines anti-Hebbian LTD in visual cortex basket cells |
| title_full | Postsynaptic spiking determines anti-Hebbian LTD in visual cortex basket cells |
| title_fullStr | Postsynaptic spiking determines anti-Hebbian LTD in visual cortex basket cells |
| title_full_unstemmed | Postsynaptic spiking determines anti-Hebbian LTD in visual cortex basket cells |
| title_short | Postsynaptic spiking determines anti-Hebbian LTD in visual cortex basket cells |
| title_sort | postsynaptic spiking determines anti hebbian ltd in visual cortex basket cells |
| topic | inhibitory interneurons plasticity synapse spike-timing dependent plasticity visual cortex action potential backpropagation |
| url | https://www.frontiersin.org/articles/10.3389/fnsyn.2025.1548563/full |
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