期刊
JOURNAL OF NEUROSCIENCE
卷 39, 期 35, 页码 6978-6991出版社
SOC NEUROSCIENCE
DOI: 10.1523/JNEUROSCI.2158-18.2019
关键词
Barnes maze; hippocampus; optogenetics; prefrontal cortex; sleep; spatial memory
资金
- DFG [SPP 1665 MA2053/4, SPP 1665 OH69/1-2, SPP 1926 WI4485/3-1, SFBTR654/TPA6, FOR2419 WI4485/2-1]
- Center for Behavioral Brain Sciences [FKZ ZS/2016/04/78120]
Time locking between neocortical sleep slow oscillations, thalamo-cortical spindles, and hippocampal sharp-wave ripples has convincingly been shown to be a key element of systems consolidation. Here we investigate the role of monosynaptic projections from ventral/intermediate hippocampus to medial prefrontal cortex (mPFC) in sleep-dependent memory consolidation in male mice. Following acquisition learning in the Barnes maze, we optogenetically silenced the axonal terminals of hippocampal projections within mPFC during slow-wave sleep. This silencing during SWS selectively impaired recent but not remote memory in the absence of effects on error rate and escape latencies. Furthermore, it prevented the development of the most efficient search strategy and sleep spindle time-locking to slow oscillation. An increase in post-learning sleep sharp-wave ripple (SPWR) density and reduced time locking of learning-associated SPWR activity to sleep spindles may be a less specific response. Our results demonstrate that monosynaptic projections from hippocampus to mPFC contribute to sleep-dependent memory consolidation, potentially by affecting the temporal coupling of sleep-associated electrophysiological events.
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