Yang, Wei and Chini, Mattia and Pöpplau, Jastyn A. and Formozov, Andrey and Dieter, Alexander and Piechocinski, Patrick and Rais, Cynthia and Morellini, Fabio and Sporns, Olaf and Hanganu-Opatz, Ileana L. and Wiegert, J. Simon and Csicsvari, Jozsef (2021) Anesthetics fragment hippocampal network activity, alter spine dynamics, and affect memory consolidation. PLOS Biology, 19 (4). e3001146. ISSN 1545-7885
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Abstract
General anesthesia is characterized by reversible loss of consciousness accompanied by transient amnesia. Yet, long-term memory impairment is an undesirable side effect. How different types of general anesthetics (GAs) affect the hippocampus, a brain region central to memory formation and consolidation, is poorly understood. Using extracellular recordings, chronic 2-photon imaging, and behavioral analysis, we monitor the effects of isoflurane (Iso), medetomidine/midazolam/fentanyl (MMF), and ketamine/xylazine (Keta/Xyl) on network activity and structural spine dynamics in the hippocampal CA1 area of adult mice. GAs robustly reduced spiking activity, decorrelated cellular ensembles, albeit with distinct activity signatures, and altered spine dynamics. CA1 network activity under all 3 anesthetics was different to natural sleep. Iso anesthesia most closely resembled unperturbed activity during wakefulness and sleep, and network alterations recovered more readily than with Keta/Xyl and MMF. Correspondingly, memory consolidation was impaired after exposure to Keta/Xyl and MMF, but not Iso. Thus, different anesthetics distinctly alter hippocampal network dynamics, synaptic connectivity, and memory consolidation, with implications for GA strategy appraisal in animal research and clinical settings.
Item Type: | Article |
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Subjects: | Eurolib Press > Biological Science |
Depositing User: | Managing Editor |
Date Deposited: | 23 Mar 2023 05:45 |
Last Modified: | 07 Jun 2024 09:41 |
URI: | http://info.submit4journal.com/id/eprint/798 |