Sangam: A Confluence of Knowledge Streams

Optogenetic dissection of ictal propagation in the hippocampal–entorhinal cortex structures

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dc.contributor Massachusetts Institute of Technology. Department of Brain and Cognitive Sciences
dc.contributor McGovern Institute for Brain Research at MIT
dc.contributor Feng, Guoping
dc.creator Lu, Yi
dc.creator Zhong, Cheng
dc.creator Wang, Lulu
dc.creator Wei, Pengfei
dc.creator He, Wei
dc.creator Huang, Kang
dc.creator Zhang, Yi
dc.creator Zhan, Yang
dc.creator Feng, Guoping
dc.creator Wang, Liping
dc.date 2017-05-12T22:42:46Z
dc.date 2017-05-12T22:42:46Z
dc.date 2016-10
dc.date 2015-12
dc.date.accessioned 2023-03-01T18:08:46Z
dc.date.available 2023-03-01T18:08:46Z
dc.identifier 2041-1723
dc.identifier http://hdl.handle.net/1721.1/109064
dc.identifier Lu, Yi et al. “Optogenetic Dissection of Ictal Propagation in the Hippocampal–entorhinal Cortex Structures.” Nature Communications 7 (2016): 10962. © 2017 Macmillan Publishers Limited
dc.identifier https://orcid.org/0000-0002-8021-277X
dc.identifier.uri http://localhost:8080/xmlui/handle/CUHPOERS/278920
dc.description Temporal lobe epilepsy (TLE) is one of the most common drug-resistant forms of epilepsy in adults and usually originates in the hippocampal formations. However, both the network mechanisms that support the seizure spread and the exact directions of ictal propagation remain largely unknown. Here we report the dissection of ictal propagation in the hippocampal–entorhinal cortex (HP–EC) structures using optogenetic methods in multiple brain regions of a kainic acid-induced model of TLE in VGAT-ChR2 transgenic mice. We perform highly temporally precise cross-area analyses of epileptic neuronal networks and find a feed-forward propagation pathway of ictal discharges from the dentate gyrus/hilus (DGH) to the medial entorhinal cortex, instead of a re-entrant loop. We also demonstrate that activating DGH GABAergic interneurons can significantly inhibit the spread of ictal seizures and largely rescue behavioural deficits in kainate-exposed animals. These findings may shed light on future therapeutic treatments of TLE.
dc.format application/pdf
dc.language en_US
dc.publisher Nature Publishing Group
dc.relation http://dx.doi.org/10.1038/ncomms10962
dc.relation Nature Communications
dc.rights Creative Commons Attribution
dc.rights http://creativecommons.org/licenses/by/4.0/
dc.source Nature Publishing Group
dc.title Optogenetic dissection of ictal propagation in the hippocampal–entorhinal cortex structures
dc.type Article
dc.type http://purl.org/eprint/type/JournalArticle


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