Memory engrams: Recalling the past and imagining the future

SA Josselyn, S Tonegawa - Science, 2020 - science.org
BACKGROUND The idea that memory is stored as enduring changes in the brain dates
back at least to the time of Plato and Aristotle (circa 350 BCE), but its scientific articulation …

Forgetting as a form of adaptive engram cell plasticity

TJ Ryan, PW Frankland - Nature Reviews Neuroscience, 2022 - nature.com
One leading hypothesis suggests that memories are stored in ensembles of neurons (or
'engram cells') and that successful recall involves reactivation of these ensembles. A logical …

[HTML][HTML] Microglial remodeling of the extracellular matrix promotes synapse plasticity

PT Nguyen, LC Dorman, S Pan, ID Vainchtein, RT Han… - Cell, 2020 - cell.com
Synapse remodeling is essential to encode experiences into neuronal circuits. Here, we
define a molecular interaction between neurons and microglia that drives experience …

Engram neurons: Encoding, consolidation, retrieval, and forgetting of memory

A Guskjolen, MS Cembrowski - Molecular psychiatry, 2023 - nature.com
Tremendous strides have been made in our understanding of the neurobiological substrates
of memory–the so-called memory “engram”. Here, we integrate recent progress in the …

Dentate gyrus circuits for encoding, retrieval and discrimination of episodic memories

T Hainmueller, M Bartos - Nature Reviews Neuroscience, 2020 - nature.com
The dentate gyrus (DG) has a key role in hippocampal memory formation. Intriguingly, DG
lesions impair many, but not all, hippocampus-dependent mnemonic functions, indicating …

Rifaximin-mediated gut microbiota regulation modulates the function of microglia and protects against CUMS-induced depression-like behaviors in adolescent rat

H Li, Y Xiang, Z Zhu, W Wang, Z Jiang, M Zhao… - Journal of …, 2021 - Springer
Background Chronic unpredictable mild stress (CUMS) can not only lead to depression-like
behavior but also change the composition of the gut microbiome. Regulating the gut …

The role of adult hippocampal neurogenesis in brain health and disease

T Toda, SL Parylak, SB Linker, FH Gage - Molecular psychiatry, 2019 - nature.com
Adult neurogenesis in the dentate gyrus of the hippocampus is highly regulated by a number
of environmental and cell-intrinsic factors to adapt to environmental changes. Accumulating …

Engrams and circuits crucial for systems consolidation of a memory

T Kitamura, SK Ogawa, DS Roy, T Okuyama… - Science, 2017 - science.org
Episodic memories initially require rapid synaptic plasticity within the hippocampus for their
formation and are gradually consolidated in neocortical networks for permanent storage …

Adult hippocampal neurogenesis and cognitive flexibility—linking memory and mood

C Anacker, R Hen - Nature Reviews Neuroscience, 2017 - nature.com
Adult hippocampal neurogenesis has been implicated in cognitive processes, such as
pattern separation, and in the behavioural effects of stress and antidepressants. Young adult …

The role of inhibitory circuits in hippocampal memory processing

L Topolnik, S Tamboli - Nature Reviews Neuroscience, 2022 - nature.com
GABAergic inhibitory circuits play an essential role in coordinating various hippocampal
functions. Several decades of work dedicated to a thorough characterization of hippocampal …