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Memory reconsolidation

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https://www.readbyqxmd.com/read/28214541/think-twice-it%C3%AC-s-all-right-long-lasting-effects-of-disrupted-reconsolidation-on-brain-and-behavior-in-human-long-term-fear
#1
Johannes Björkstrand, Thomas Agren, Fredrik Åhs, Andreas Frick, Elna-Marie Larsson, Olof Hjorth, Tomas Furmark, Mats Fredrikson
Memories can be modified when recalled. Experimental fear conditioning studies support that amygdala-localized fear memories are attenuated when reconsolidation is disrupted through extinction training immediately following memory activation. Recently, using functional brain imaging in individuals with lifelong spider fears, we demonstrated that fear memory activation followed by repeated exposure to feared cues after 10minutes, thereby disrupting reconsolidation, attenuated activity in the amygdala during later re-exposure, and also facilitated approach behavior to feared cues...
February 15, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28202715/updating-of-aversive-memories-after-temporal-error-detection-is-differentially-modulated-by-mtor-across-development
#2
Lucille Tallot, Lorenzo Diaz-Mataix, Rosemarie E Perry, Kira Wood, Joseph E LeDoux, Anne-Marie Mouly, Regina M Sullivan, Valérie Doyère
The updating of a memory is triggered whenever it is reactivated and a mismatch from what is expected (i.e., prediction error) is detected, a process that can be unraveled through the memory's sensitivity to protein synthesis inhibitors (i.e., reconsolidation). As noted in previous studies, in Pavlovian threat/aversive conditioning in adult rats, prediction error detection and its associated protein synthesis-dependent reconsolidation can be triggered by reactivating the memory with the conditioned stimulus (CS), but without the unconditioned stimulus (US), or by presenting a CS-US pairing with a different CS-US interval than during the initial learning...
March 2017: Learning & Memory
https://www.readbyqxmd.com/read/28176459/reconsolidation-induced-rescue-of-a-remote-fear-memory-blocked-by-an-early-cortical-inhibition-involvement-of-the-anterior-cingulate-cortex-and-the-mediation-by-the-thalamic-nucleus-reuniens
#3
Rodrigo O Sierra, Lizeth K Pedraza, Querusche K Zanona, Fabiana Santana, Flávia Z Boos, Ana P Crestani, Josué Haubrich, Lucas de Oliveira Alvares, Maria Elisa Calcagnotto, Jorge A Quillfeldt
Systems consolidation is a time-dependent reorganization process involving neocortical and hippocampal networks underlying memory storage and retrieval. The involvement of the hippocampus during acquisition is well described, however we know much less about the concomitant contribution of cortical activity levels to the formation of stable remote memories. Here, after a reversible pharmacological inhibition of the anterior cingulate cortex (ACC) during the acquisition of a contextual fear conditioning, retrieval of both recent and remote memories were impaired, an effect that was reverted by a single memory reactivation session 48h after training, through a destabilization-dependent mechanism interpreted as reconsolidation, that restored the normal course of systems consolidation in order to rescue a remote memory...
February 8, 2017: Hippocampus
https://www.readbyqxmd.com/read/28174526/reconsolidation-extinction-interactions-in-fear-memory-attenuation-the-role-of-inter-trial-interval-variability
#4
Allison Auchter, Lawrence K Cormack, Yael Niv, Francisco Gonzalez-Lima, Marie H Monfils
Fear extinction typically results in the formation of a new inhibitory memory that suppresses the original conditioned response. Evidence also suggests that extinction training during a retrieval-induced labile period results in integration of the extinction memory into the original fear memory, rendering the fear memory less susceptible to reinstatement. Here we investigated the parameters by which the retrieval-extinction paradigm was most effective in memory updating. Specifically, we manipulated the inter-trial intervals (ITIs) between conditional stimulus (CS) presentations during extinction, examining how having interval lengths with different degrees of variability affected the strength of memory updating...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28171767/extinction-during-reconsolidation-eliminates-recovery-of-fear-conditioned-to-fear-irrelevant-and-fear-relevant-stimuli
#5
Alina Thompson, Ottmar V Lipp
Extant literature suggests that extinction training delivered during the memory reconsolidation period is superior to traditional extinction training in the reduction of fear recovery, as it targets the original fear memory trace. At present it is debated whether different types of fear memories are differentially sensitive to behavioral manipulations of reconsolidation. Here, we examined post-reconsolidation recovery of fear as a function of conditioned stimulus (CS) fear-relevance, using the unconditioned stimulus (US) to reactivate and destabilize conditioned fear memories...
February 2, 2017: Behaviour Research and Therapy
https://www.readbyqxmd.com/read/28169439/postretrieval-extinction-attenuates-alcohol-cue-reactivity-in-rats
#6
Roberto U Cofresí, Suzanne M Lewis, Nadia Chaudhri, Hongjoo J Lee, Marie-H Monfils, Rueben A Gonzales
BACKGROUND: Conditioned responses to alcohol-associated cues can hinder recovery from alcohol use disorder (AUD). Cue exposure (extinction) therapy (CET) can reduce reactivity to alcohol cues, but its efficacy is limited by phenomena such as spontaneous recovery and reinstatement that can cause a return of conditioned responding after extinction. Using a preclinical model of alcohol cue reactivity in rats, we evaluated whether the efficacy of alcohol CET could be improved by conducting CET during the memory reconsolidation window after retrieval of cue-alcohol associations...
February 7, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28169286/garcinol-blocks-the-reconsolidation-of-multiple-cocaine-paired-cues-after-a-single-cocaine-reactivation-session
#7
Amber B Dunbar, Jane R Taylor
Manipulations of memory reconsolidation can interfere with the ability of a drug-paired cue to drive drug-seeking behavior. However, the typical reconsolidation paradigm that reactivates the memory through the presentation of the cue (conditioned stimulus; CS) only interferes with the memory of the reactivated CS while leaving other drug-paired CSs intact and able to continue driving drug-seeking behavior. Here, we used a novel unconditioned-stimulus (US) reactivation paradigm to interfere with the ability of multiple cues to drive drug-seeking behavior after just one reactivation and treatment session...
February 7, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28159636/computational-comparison-of-a-calcium-dependent-jellyfish-protein-apoaequorin-and-calmodulin-cholesterol-in-short-term-memory-maintenance
#8
Gene A Morrill, Adele B Kostellow, Raj K Gupta
Memory reconsolidation and maintenance depend on calcium channels and on calcium/calmodulin-dependent kinases regulating protein turnover in the hippocampus. Ingestion of a jellyfish protein, apoaequorin, reportedly protects and/or improves verbal learning in adults and is currently widely advertised for use by the elderly. Apoaequorin is a member of the EF-hand calcium binding family of proteins that includes calmodulin. Calmodulin-1 (148 residues) differs from Apoaequorin (195 residues) in that it contains four rather than three Ca(2+)-binding sites and three rather than four cholesterol-binding (CRAC, CARC) domains...
January 31, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28152467/prevention-of-recurrent-affective-episodes-using-extinction-training-in-the-reconsolidation-window-a-testable-psychotherapeutic-strategy
#9
REVIEW
Robert M Post, Robert Kegan
Stressors may initially precipitate affective episodes, but with sufficient numbers of recurrences, episodes can occur more autonomously. It is postulated the memory engram for these recurrent depressions moves from the conscious representational memory system to the unconscious habit memory system encoded in the striatum. If this were the case, cognitive behavior therapy targeted toward extinction of habit memories could be an effective maneuver for helping reverse the automaticity of affective episode recurrence...
January 20, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28146250/effect-of-selective-inhibition-of-reactivated-nicotine-associated-memories-with-propranolol-on-nicotine-craving
#10
Yan-Xue Xue, Jia-Hui Deng, Ya-Yun Chen, Li-Bo Zhang, Ping Wu, Geng-Di Huang, Yi-Xiao Luo, Yan-Ping Bao, Yu-Mei Wang, Yavin Shaham, Jie Shi, Lin Lu
Importance: A relapse into nicotine addiction during abstinence often occurs after the reactivation of nicotine reward memories, either by acute exposure to nicotine (a smoking episode) or by smoking-associated conditioned stimuli (CS). Preclinical studies suggest that drug reward memories can undergo memory reconsolidation after being reactivated, during which they can be weakened or erased by pharmacological or behavioral manipulations. However, translational clinical studies using CS-induced memory retrieval-reconsolidation procedures to decrease drug craving reported inconsistent results...
February 1, 2017: JAMA Psychiatry
https://www.readbyqxmd.com/read/28139682/updating-procedures-can-reorganize-the-neural-circuit-supporting-a-fear-memory
#11
Janine L Kwapis, Timothy J Jarome, Nicole C Ferrara, Fred J Helmstetter
Established memories undergo a period of vulnerability following retrieval, a process termed 'reconsolidation.' Recent work has shown that the hypothetical process of reconsolidation is only triggered when new information is presented during retrieval, suggesting that this process may allow existing memories to be modified. Reconsolidation has received increasing attention as a possible therapeutic target for treating disorders that stem from traumatic memories, yet little is known about how this process changes the original memory...
January 31, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28131675/the-involvement-of-cannabinoids-and-mtor-in-the-reconsolidation-of-an-emotional-memory-in-the-hippocampal-amygdala-insular-circuit
#12
Salman Zubedat, Irit Akirav
Memory reconsolidation is the process in which reactivated long-term memory becomes transiently sensitive to amnesic agents. We evaluated the ability of post reactivation administration of the mTOR inhibitor rapamycin, separately and in combination with the cannabinoid CB1/2 receptor agonist WIN55,212-2 (WIN), given systemically or specifically into the hippocampal CA1 area, basolateral amygdala (BLA) or insular cortex (IC), to reduce inhibitory avoidance fear in rats. Systemic administration of rapamycin after reactivation of fear memory impaired reconsolidation and facilitated extinction...
January 25, 2017: European Neuropsychopharmacology: the Journal of the European College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28119018/reconsolidation-and-extinction-using-epigenetic-signatures-to-challenge-conventional-wisdom
#13
Thekla J Hemstedt, K Matthew Lattal, Marcelo A Wood
Epigenetic mechanisms have the potential to give rise to lasting changes in cell function that ultimately can affect behavior persistently. This concept is especially interesting with respect to fear reconsolidation and fear memory extinction. These two behavioral approaches are used in the laboratory to investigate how fear memory can be attenuated, which becomes important when searching for therapeutic intervention to treat anxiety disorders and post-traumatic stress disorder. Here we review the role of several key epigenetic mechanisms in reconsolidation and extinction of learned fear and their potential to persistently alter behavioral responses to conditioned cues...
January 21, 2017: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/28096495/memory-disrupting-effects-of-nonmuscle-myosin-ii-inhibition-depend-on-the-class-of-abused-drug-and-brain-region
#14
Sherri B Briggs, Ashley M Blouin, Erica J Young, Gavin Rumbaugh, Courtney A Miller
Depolymerizing actin in the amygdala through nonmuscle myosin II inhibition (NMIIi) produces a selective, lasting, and retrieval-independent disruption of the storage of methamphetamine-associated memories. Here we report a similar disruption of memories associated with amphetamine, but not cocaine or morphine, by NMIIi. Reconsolidation appeared to be disrupted with cocaine. Unlike in the amygdala, methamphetamine-associated memory storage was not disrupted by NMIIi in the hippocampus, nucleus accumbens, or orbitofrontal cortex...
February 2017: Learning & Memory
https://www.readbyqxmd.com/read/28067617/role-of-protein-synthesis-and-dna-methylation-in-the-consolidation-and-maintenance-of-long-term-memory-in-aplysia
#15
Kaycey Pearce, Diancai Cai, Adam C Roberts, David L Glanzman
Previously, we reported that long-term memory (LTM) in Aplysia can be reinstated by truncated (partial) training following its disruption by reconsolidation blockade and inhibition of PKM (Chen et al., 2014). Here, we report that LTM can be induced by partial training after disruption of original consolidation by protein synthesis inhibition (PSI) begun shortly after training. But when PSI occurs during training, partial training cannot subsequently establish LTM. Furthermore, we find that inhibition of DNA methyltransferase (DNMT), whether during training or shortly afterwards, blocks consolidation of LTM and prevents its subsequent induction by truncated training; moreover, later inhibition of DNMT eliminates consolidated LTM...
January 9, 2017: ELife
https://www.readbyqxmd.com/read/28065842/fear-extinction-and-memory-reconsolidation-as-critical-components-in-behavioral-treatment-for-posttraumatic-stress-disorder-and-potential-augmentation-of-these-processes
#16
REVIEW
Noelle B Smith, Jennifer M Doran, Lauren M Sippel, Ilan Harpaz-Rotem
Posttraumatic stress disorder (PTSD) is associated with alterations in critical brain regions such as the amygdala, hippocampus, and prefrontal cortex. This brief review has two objectives: (1) to discuss research examining extinction and reconsolidation processes as mechanisms in PTSD psychotherapy, and (2) present possibilities for augmenting extinction and reconsolidation within treatment through alterations to therapeutic interventions and novel approaches. A key component of many effective PTSD therapies is exposure, which involves intentional confrontation and processing of the traumatic memory...
January 5, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28042872/infralimbic-glun2a-containing-nmda-receptors-modulate-reconsolidation-of-cocaine-self-administration-memory
#17
Madalyn Hafenbreidel, Carolynn Rafa Todd, Devin Mueller
Addiction is characterized by high relapse susceptibility, and relapse can be triggered by drug-associated cues. Cue presentation induces retrieval of the drug-cue memory, which becomes labile and must be reconsolidated into long-term storage. Repeated unpaired cue presentation, however, induces extinction. Cue-reactivity can be reduced by blocking reconsolidation or facilitating extinction, which are mediated by NMDA receptors (NMDArs). However, the role of NMDArs in either process following self-administration is unclear...
January 2, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28039087/inhibition-of-transcription-and-translation-in-the-striatum-after-memory-reactivation-lack-of-evidence-of-reconsolidation
#18
Roberto A Prado-Alcalá, Andrea Cristina Medina, Paola C Bello-Medina, Gina L Quirarte
It has been found that interference with neural activity after a consolidated memory is retrieved produces an amnestic state; this has been taken has indicative of destabilization of the memory trace that would have been produced by a process of reconsolidation (allowing for maintenance of the original trace). However, a growing body of evidence shows that this is not a reliable effect, and that it is dependent upon some experimental conditions, such as the age of the memory, memory reactivation procedures, the predictability of the reactivation stimulus, and strength of training...
December 27, 2016: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/28034785/modulation-of-the-consolidation-and-reconsolidation-of-fear-memory-by-three-different-serotonin-receptors-in-hippocampus
#19
S D Schmidt, C R G Furini, C G Zinn, L E Cavalcante, F F Ferreira, J A K Behling, J C Myskiw, I Izquierdo
The process of memory formation is complex and highly dynamic. During learning, the newly acquired information is found in a fragile and labile state. Through a process known as consolidation, which requires specific mechanisms such as protein synthesis, the memory trace is stored and stabilized. It is known that when a consolidated memory is recalled, it again becomes labile and sensitive to disruption. To be maintained, this memory must undergo an additional process of restabilization called reconsolidation, which requires another phase of protein synthesis...
December 27, 2016: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/28034784/altered-ampa-receptor-expression-plays-an-important-role-in-inducing-bidirectional-synaptic-plasticity-during-contextual-fear-memory-reconsolidation
#20
Subhrajit Bhattacharya, Whitney Kimble, Manal Buabeid, Dwipayan Bhattacharya, Jenna Bloemer, Ahmad Alhowail, Miranda Reed, Muralikrishnan Dhanasekaran, Martha Escobar, Vishnu Suppiramaniam
Retrieval of a memory appears to render it unstable until the memory is once again re-stabilized or reconsolidated. Although the occurrence and consequences of reconsolidation have received much attention in recent years, the specific mechanisms that underlie the process of reconsolidation have not been fully described. Here, we present the first electrophysiological model of the synaptic plasticity changes underlying the different stages of reconsolidation of a conditioned fear memory. In this model, retrieval of a fear memory results in immediate but transient alterations in synaptic plasticity, mediated by modified expression of the glutamate receptor subunits GluA1 and GluA2 in the hippocampus of rodents...
December 27, 2016: Neurobiology of Learning and Memory
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