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奖赏相关记忆痕迹巩固、回忆及再巩固的时空机制

Spatio-temporal mechanisms of consolidation, recall and reconsolidation in reward-related memory trace.

作者信息

Hamed Adam, Kursa Miron Bartosz, Mrozek Wiktoria, Piwoński Krzysztof Piotr, Falińska Monika, Danielewski Konrad, Rejmak Emilia, Włodkowska Urszula, Kubik Stepan, Czajkowski Rafał

机构信息

Laboratory of Spatial Memory, Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland.

Interdisciplinary Centre for Mathematical and Computational Modelling, University of Warsaw, Warsaw, Poland.

出版信息

Mol Psychiatry. 2025 Apr;30(4):1319-1328. doi: 10.1038/s41380-024-02738-8. Epub 2024 Sep 13.

Abstract

The formation of memories is a complex, multi-scale phenomenon, especially when it involves integration of information from various brain systems. We have investigated the differences between a novel and consolidated association of spatial cues and amphetamine administration, using an in situ hybridisation method to track the short-term dynamics during the recall testing. We have found that remote recall group involves smaller, but more consolidated groups of neurons, which is consistent with their specialisation. By employing machine learning analysis, we have shown this pattern is especially pronounced in the VTA; furthermore, we also uncovered significant activity patterns in retrosplenial and prefrontal cortices, as well as in the DG and CA3 subfields of the hippocampus. The behavioural propensity towards the associated localisation appears to be driven by the nucleus accumbens, however, further modulated by a trio of the amygdala, VTA and hippocampus, as the trained association is confronted with test experience. Moreover, chemogenetic analysis revealed central amygdala as critical for linking appetitive emotional states with spatial contexts. These results show that memory mechanisms must be modelled considering individual differences in motivation, as well as covering dynamics of the process.

摘要

记忆的形成是一种复杂的、多尺度的现象,尤其是当它涉及来自各种脑系统的信息整合时。我们使用原位杂交方法来追踪回忆测试期间的短期动态,研究了空间线索与苯丙胺给药的新关联和巩固关联之间的差异。我们发现,远期回忆组涉及较小但更巩固的神经元群,这与其专业化是一致的。通过采用机器学习分析,我们表明这种模式在腹侧被盖区尤其明显;此外,我们还在压后皮质和前额叶皮质以及海马体的齿状回和CA3亚区发现了显著的活动模式。对相关定位的行为倾向似乎由伏隔核驱动,然而,当训练的关联面对测试经验时,会受到杏仁核、腹侧被盖区和海马体三者的进一步调节。此外,化学遗传学分析表明,中央杏仁核对将食欲性情绪状态与空间背景联系起来至关重要。这些结果表明,必须在考虑动机个体差异以及涵盖该过程动态的情况下对记忆机制进行建模。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/46d3/11919705/5e81ac2c0351/41380_2024_2738_Fig1_HTML.jpg

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