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Carlie J, Sahlén B, Andersson K, Johansson R, Whitling S, Jonas Brännström K. Culturally and linguistically diverse children's retention of spoken narratives encoded in quiet and in babble noise. J Exp Child Psychol 2024; 249:106088. [PMID: 39316884 DOI: 10.1016/j.jecp.2024.106088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 09/03/2024] [Accepted: 09/04/2024] [Indexed: 09/26/2024]
Abstract
Multi-talker noise impedes children's speech processing and may affect children listening to their second language more than children listening to their first language. Evidence suggests that multi-talker noise also may impede children's memory retention and learning. A total of 80 culturally and linguistically diverse children aged 7 to 9 years listened to narratives in two listening conditions: quiet and multi-talker noise (signal-to-noise ratio +6 dB). Repeated recall (immediate and delayed recall), was measured with a 1-week retention interval. Retention was calculated as the difference in recall accuracy per question between immediate and delayed recall. Working memory capacity was assessed, and the children's degree of school language (Swedish) exposure was quantified. Immediate narrative recall was lower for the narrative encoded in noise than in quiet. During delayed recall, narrative recall was similar for both listening conditions. Children with higher degrees of school language exposure and higher working memory capacity had better narrative recall overall, but these factors were not associated with an effect of listening condition or retention. Multi-talker babble noise does not impair culturally and linguistically diverse primary school children's retention of spoken narratives as measured by multiple-choice questions. Although a quiet listening condition allows for a superior encoding compared with a noisy listening condition, details are likely lost during memory consolidation and re-consolidation.
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Affiliation(s)
- Johanna Carlie
- Logopedics, Phoniatrics and Audiology, Department of Clinical Sciences in Lund, Lund University, 221 00 Lund, Sweden.
| | - Birgitta Sahlén
- Logopedics, Phoniatrics and Audiology, Department of Clinical Sciences in Lund, Lund University, 221 00 Lund, Sweden
| | - Ketty Andersson
- Logopedics, Phoniatrics and Audiology, Department of Clinical Sciences in Lund, Lund University, 221 00 Lund, Sweden
| | - Roger Johansson
- Department of Psychology, Lund University, 221 00 Lund, Sweden
| | - Susanna Whitling
- Logopedics, Phoniatrics and Audiology, Department of Clinical Sciences in Lund, Lund University, 221 00 Lund, Sweden
| | - K Jonas Brännström
- Logopedics, Phoniatrics and Audiology, Department of Clinical Sciences in Lund, Lund University, 221 00 Lund, Sweden
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2
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Soares LA, Nascimento LMM, Guimarães FS, Gazarini L, Bertoglio LJ. Dual-step pharmacological intervention for traumatic-like memories: implications from D-cycloserine and cannabidiol or clonidine in male and female rats. Psychopharmacology (Berl) 2024; 241:1827-1840. [PMID: 38691149 DOI: 10.1007/s00213-024-06596-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Accepted: 04/19/2024] [Indexed: 05/03/2024]
Abstract
RATIONALE Therapeutic approaches to mitigating traumatic memories have often faced resistance. Exploring safe reconsolidation blockers, drugs capable of reducing the emotional valence of the memory upon brief retrieval and reactivation, emerges as a promising pharmacological strategy. Towards this objective, preclinical investigations should focus on aversive memories resulting in maladaptive outcomes and consider sex-related differences to enhance their translatability. OBJECTIVES After selecting a relatively high training magnitude leading to the formation of a more intense and generalized fear memory in adult female and male rats, we investigated whether two clinically approved drugs disrupting its reconsolidation remain effective. RESULTS We found resistant reconsolidation impairment by the α2-adrenergic receptor agonist clonidine or cannabidiol, a major non-psychotomimetic Cannabis sativa component. However, pre-retrieval administration of D-cycloserine, a partial agonist at the glycine-binding site of the N-methyl-D-aspartate (NMDA) receptor complex, facilitated their impairing effects on reconsolidation. A similar reconsolidation blockade by clonidine or cannabidiol was achieved following exposure to a non-conditioned but generalized context after D-cycloserine administration. This suggests that sufficient memory destabilization can accompany generalized fear expression. Combining clonidine with cannabidiol without potentiating memory destabilization by D-cycloserine was ineffective. CONCLUSIONS These findings highlight the importance of NMDA receptor signaling in memory destabilization and underscore the efficacy of a dual-step pharmacological intervention in attenuating traumatic-like memories, even in a context different from the original learning environment.
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Affiliation(s)
- Luciane A Soares
- Departamento de Farmacologia, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
| | - Laura M M Nascimento
- Departamento de Farmacologia, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
| | | | - Lucas Gazarini
- Universidade Federal de Mato Grosso Do Sul, Três Lagoas, MS, Brazil
| | - Leandro J Bertoglio
- Universidade Federal de Mato Grosso Do Sul, Três Lagoas, MS, Brazil.
- Depto. de Farmacologia, CCB, UFSC, Campus Universitário S/N, Florianópolis, SC, 88049-900, Brazil.
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3
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Dong X, Wang Y, Liu Y, Li Y. Fear generalization modulated by shock intensity and protein synthesis inhibitor. Psychopharmacology (Berl) 2024:10.1007/s00213-024-06662-1. [PMID: 39105767 DOI: 10.1007/s00213-024-06662-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Accepted: 07/29/2024] [Indexed: 08/07/2024]
Abstract
RATIONALE Maladaptive fear responses, including sensitized threat reactions and overgeneralization, contribute to anxiety disorders such as generalized anxiety disorder and post-traumatic stress disorder. Although stress intensity influences the generation and extent of these maladaptive fears, the underlying mechanisms remain unclear. OBJECTIVES The present study examined whether varying footshock stress intensity and inhibition of protein synthesis have differential effect on fear sensitization and generalization in mice. METHODS Mice were subjected to a classic fear conditioning protocol involving five different levels of footshock intensities. Prior to fear acquisition, the protein synthesis inhibitor cycloheximide (CHX) was administered intraperitoneally. Fear sensitization to white noise and fear generalization to tones with frequencies differing from the conditioned tone were assessed at either 2 or 4 days after fear acquisition. RESULTS The results showed that, although varying shock intensities (except the lowest) led to a similar pattern of increased freezing during auditory cues in fear acquisition, the extent of both fear sensitization and generalization increased with the intensity of the footshock in the following days. As shock intensities increased, there was a proportional rise in sensitized fear to white noise and generalized freezing to tones with frequencies progressively closer to the conditioned stimulus. Mildest shocks did not induce discriminative conditioned fear memory, whereas the most intense shocks led to pronounced fear generalization. Administration of CHX before fear acquisition did not affect sensitized fear but reduced generalization of freezing to tones dissimilar from the conditioned stimulus in the group exposed to the most intense shock. CONCLUSIONS Our results suggest that maladaptive fear responses elicited by varying stress intensities exhibit distinct characteristics. The effect of CHX to prevent overgeneralization without affecting discriminative fear memory points to potential therapeutic approaches for fear-related disorders, suggesting the possibility of mitigating overgeneralization while preserving necessary fear discrimination.
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Affiliation(s)
- Xinwen Dong
- Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, China.
| | - Yunyun Wang
- Department of Neuroendocrine Pharmacology, School of Pharmacy, China Medical University, Shenyang, China
| | - Yudan Liu
- Department of Neuroendocrine Pharmacology, School of Pharmacy, China Medical University, Shenyang, China
| | - Yonghui Li
- Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, China
- Department of Psychology, University of Chinese Academy of Sciences, Beijing, China
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Casagrande MA, Porto RR, Haubrich J, Kautzmann A, de Oliveira Álvares L. Emotional Value of Fear Memory and the Role of the Ventral Hippocampus in Systems Consolidation. Neuroscience 2023; 535:184-193. [PMID: 37944583 DOI: 10.1016/j.neuroscience.2023.11.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 10/31/2023] [Accepted: 11/05/2023] [Indexed: 11/12/2023]
Abstract
Recent studies have explored the circuitry involving the ventral hippocampus (vHPC), the amygdala, and the prefrontal cortex, a pathway mainly activated to store contextual information efficiently. Lesions in the vHPC impair remote memory, but not in the short term. However, how the vHPC is affected by distinct memory strength or its role in systems consolidation has not yet been elucidated. Here, we investigated how distinct training intensities, with strong or weak contextual fear conditioning, affect activation of the dorsal hippocampus (dHPC) and the vHPC. We found that the time course of memory consolidation differs in fear memories of different training intensities in both the dHPC and vHPC. Our results also indicate that memory generalization happens alongside greater activation of the vHPC, and these processes occur faster with stronger fear memories. The vHPC is required for the expression of remote fear memory and may control contextual fear generalization, a view corroborated by the fact that inactivation of the vHPC suppresses generalized fear expression, making memory more precise again. Systems consolidation occurs concomitantly with greater activation of the vHPC, which is accelerated in stronger fear memories. These findings lead us to propose that greater activation of the vHPC could be used as a marker for memory generalization.
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Affiliation(s)
- M A Casagrande
- Laboratório de Neurobiologia da Memória, Departamento de Biofísica, Instituto de Biociências, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, Prédio 43422, Sala 216, CEP 91.501-970 Porto Alegre, Rio Grande do Sul, Brasil
| | - R R Porto
- Behavioural Neuroscience Laboratory, Western Sydney University, School of Medicine, Cnr David Pilgrim Ave & Goldsmith Ave, Building 30, Campbelltown, NSW 2560, Australia
| | - J Haubrich
- Dept. of Neurophysiology, Medical Faculty, Ruhr-University Bochum, Universitätsstraße, 150 MA 4/150, 44780 Bochum, Germany
| | - A Kautzmann
- Laboratório de Neurobiologia da Memória, Departamento de Biofísica, Instituto de Biociências, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, Prédio 43422, Sala 216, CEP 91.501-970 Porto Alegre, Rio Grande do Sul, Brasil
| | - L de Oliveira Álvares
- Laboratório de Neurobiologia da Memória, Departamento de Biofísica, Instituto de Biociências, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, Prédio 43422, Sala 216, CEP 91.501-970 Porto Alegre, Rio Grande do Sul, Brasil.
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Haubrich J, Nader K. Network-level changes in the brain underlie fear memory strength. eLife 2023; 12:RP88172. [PMID: 38047914 PMCID: PMC10695559 DOI: 10.7554/elife.88172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2023] Open
Abstract
The strength of a fear memory significantly influences whether it drives adaptive or maladaptive behavior in the future. Yet, how mild and strong fear memories differ in underlying biology is not well understood. We hypothesized that this distinction may not be exclusively the result of changes within specific brain regions, but rather the outcome of collective changes in connectivity across multiple regions within the neural network. To test this, rats were fear conditioned in protocols of varying intensities to generate mild or strong memories. Neuronal activation driven by recall was measured using c-fos immunohistochemistry in 12 brain regions implicated in fear learning and memory. The interregional coordinated brain activity was computed and graph-based functional networks were generated to compare how mild and strong fear memories differ at the systems level. Our results show that mild fear recall is supported by a well-connected brain network with small-world properties in which the amygdala is well-positioned to be modulated by other regions. In contrast, this connectivity is disrupted in strong fear memories and the amygdala is isolated from other regions. These findings indicate that the neural systems underlying mild and strong fear memories differ, with implications for understanding and treating disorders of fear dysregulation.
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Affiliation(s)
- Josue Haubrich
- Department of Psychology, McGill UniversityMontréalCanada
- Department of Neurophysiology, Ruhr-University BochumBochumGermany
| | - Karim Nader
- Department of Psychology, McGill UniversityMontréalCanada
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6
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Caudwell KM, Baldini S, Calvezzi G, Graham A, Jackson K, Johansson I, Sines M, Lim LW, Aquili L. Learning bias predicts fear acquisition under stress but not cognitive flexibility. Physiol Behav 2023; 272:114384. [PMID: 37866645 DOI: 10.1016/j.physbeh.2023.114384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 10/16/2023] [Accepted: 10/19/2023] [Indexed: 10/24/2023]
Abstract
Individuals differ in their ability to learn from reinforcement and in avoiding punishment, which can be measured by the Probabilistic Selection Task (PST). Recently, some studies have demonstrated that this learning bias is regulated by the dopaminergic system, and that stress can differentially affect the use of positive (i.e., reinforcement) and negative (i.e., avoiding punishment) feedback. The current two studies examined whether performance on the PST can predict measures of goal-directed behaviour as assessed by a cognitive flexibility task (Wisconsin Card Sorting Test) and the acquisition of fear responses, when individuals are exposed to a stressor (Socially Evaluated Cold Pressor Test). A total of 26 and 59 healthy participants completed Experiments I and II, respectively. In those who were best at learning from reinforcement, stress increased the processing (i.e., higher skin conductance responses) of non-threatening stimuli during fear acquisition compared to the non-stressful condition, which was not recapitulated in those who were best at avoiding punishment. Additionally, PST performance did not interact with stress to modulate cognitive flexibility, although stress negatively impaired this domain, consistent with previous findings. Furthermore, independent of stress, both positive and negative learning biases were correlated with cognitive flexibility errors. Our results demonstrate that the PST has predictive value for better understanding the determinants of reinforcement and avoidance learning.
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Affiliation(s)
- Kim M Caudwell
- Faculty of Health, Charles Darwin University, Darwin, Australia
| | - Sara Baldini
- College of Health and Education, School of Psychology, Murdoch University, Perth, Australia
| | - Gemma Calvezzi
- College of Health and Education, School of Psychology, Murdoch University, Perth, Australia
| | - Aidan Graham
- College of Health and Education, School of Psychology, Murdoch University, Perth, Australia
| | - Kasie Jackson
- College of Health and Education, School of Psychology, Murdoch University, Perth, Australia
| | - Isabella Johansson
- College of Health and Education, School of Psychology, Murdoch University, Perth, Australia
| | - Madeline Sines
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region of China
| | - Lee Wei Lim
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region of China
| | - Luca Aquili
- College of Health and Education, School of Psychology, Murdoch University, Perth, Australia; School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region of China.
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7
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On making (and turning adaptive to) maladaptive aversive memories in laboratory rodents. Neurosci Biobehav Rev 2023; 147:105101. [PMID: 36804263 DOI: 10.1016/j.neubiorev.2023.105101] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 02/03/2023] [Accepted: 02/14/2023] [Indexed: 02/18/2023]
Abstract
Fear conditioning and avoidance tasks usually elicit adaptive aversive memories. Traumatic memories are more intense, generalized, inflexible, and resistant to attenuation via extinction- and reconsolidation-based strategies. Inducing and assessing these dysfunctional, maladaptive features in the laboratory are crucial to interrogating posttraumatic stress disorder's neurobiology and exploring innovative treatments. Here we analyze over 350 studies addressing this question in adult rats and mice. There is a growing interest in modeling several qualitative and quantitative memory changes by exposing already stressed animals to freezing- and avoidance-related tests or using a relatively high aversive training magnitude. Other options combine aversive/fearful tasks with post-acquisition or post-retrieval administration of one or more drugs provoking neurochemical or epigenetic alterations reported in the trauma aftermath. It is potentially instructive to integrate these procedures and incorporate the measurement of autonomic and endocrine parameters. Factors to consider when defining the organismic and procedural variables, partially neglected aspects (sex-dependent differences and recent vs. remote data comparison) and suggestions for future research (identifying reliable individual risk and treatment-response predictors) are discussed.
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Iglesias LP, Fernandes HB, de Miranda AS, Perez MM, Faccioli LH, Sorgi CA, Bertoglio LJ, Aguiar DC, Wotjak CT, Moreira FA. TRPV1 modulation of contextual fear memory depends on stimulus intensity and endocannabinoid signalling in the dorsal hippocampus. Neuropharmacology 2023; 224:109314. [PMID: 36336070 DOI: 10.1016/j.neuropharm.2022.109314] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 10/21/2022] [Accepted: 10/28/2022] [Indexed: 11/05/2022]
Abstract
The transient receptor potential vanilloid type-1 (TRPV1) channels have been implicated in the modulation of aversive responses. The endocannabinoid anandamide acts as an endogenous TRPV1 agonist, exerting opposite functions at TRPV1 and type-1 cannabinoid receptors (CB1R). Here we tested the hypothesis that hippocampal TRPV1 modulates contextual fear memory retrieval and investigated the influence of the aversive stimulus intensity as well as the role of endocannabinoid signaling. Male C57BL/6J mice were tested for contextual fear memory after low-, moderate-, or high-intensity shock protocols. The selective TRPV1 blockers SB366791 (1-10 nmol) and 6-I-NC (2 nmol) were infused via intra-dorsal hippocampus before the retrieval test session. The local levels of endocannabinoids and Arc and Zif268 mRNAs, involved in synaptic plasticity and memory, were quantified. First, both TRPV1 blockers reduced memory retrieval in animals exposed to moderate or high (but not low) intensity training protocols. In the second series of results, the magnitude of the freezing responses positively correlated with the hippocampal anandamide levels; TRPV1 and CB1R were found co-localized in this brain region; and the CB1R antagonist, AM251, prevented the effects of SB366791. Thus, endocannabinoid signaling possibly mediates the effects of TRPV1 blockers. Finally, inhibition of memory retrieval by TRPV1 blockers increased Arc and Zif268 mRNAs and impaired fear memory reinstatement. In conclusion, the modulation of fear memories by dorsal hippocampal TRPV1 channels may depend on the aversive stimulus intensity and occur via anandamide/CB1 signaling. Moreover, TRPV1 blockers promote Arc and Zif268 transcription, with subsequent attenuation of aversive memory reinstatement.
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Affiliation(s)
- Lia P Iglesias
- Graduate School in Neuroscience and Department of Pharmacology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Heliana B Fernandes
- Department of Morphology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Aline S de Miranda
- Department of Morphology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Malena M Perez
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Lucia H Faccioli
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Carlos A Sorgi
- Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Leandro J Bertoglio
- Department of Pharmacology, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
| | - Daniele C Aguiar
- Graduate School in Neuroscience and Department of Pharmacology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Carsten T Wotjak
- Central Nervous System Diseases Research, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach Riß, Germany
| | - Fabrício A Moreira
- Graduate School in Neuroscience and Department of Pharmacology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
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Sherman BE, Harris BB, Turk-Browne NB, Sinha R, Goldfarb EV. Hippocampal mechanisms support cortisol-induced memory enhancements. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.02.08.527745. [PMID: 36798309 PMCID: PMC9934703 DOI: 10.1101/2023.02.08.527745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
Stress can powerfully influence episodic memory, often enhancing memory encoding for emotionally salient information. These stress-induced memory enhancements stand at odds with demonstrations that stress and the stress-related hormone cortisol can negatively affect the hippocampus, a brain region important for episodic memory encoding. To resolve this apparent conflict and determine whether and how the hippocampus supports memory encoding under cortisol, we combined behavioral assays of associative memory, high-resolution functional magnetic resonance imaging (fMRI), and pharmacological manipulation of cortisol in a within-participant, double-blinded procedure. Hydrocortisone led to enhanced functional connectivity between hippocampal subregions, which predicted subsequent memory enhancements for emotional information. Cortisol also modified the relationship between hippocampal representations and memory: whereas hippocampal signatures of distinctiveness predicted memory under placebo, relative integration predicted memory under cortisol. Together, these data provide novel evidence that the human hippocampus contains the necessary machinery to support emotional memory enhancements under stress.
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Affiliation(s)
| | | | | | | | - Elizabeth V Goldfarb
- Department of Psychology, Yale University
- Wu Tsai Institute, Yale University
- Department of Psychiatry, Yale University
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10
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Pedraza LK, Sierra RO, de Oliveira Alvares L. Systems consolidation and fear memory generalisation as a potential target for trauma-related disorders. World J Biol Psychiatry 2022; 23:653-665. [PMID: 35001808 DOI: 10.1080/15622975.2022.2027010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Fear memory generalisation is a central hallmark in the broad range of anxiety and trauma-related disorders. Recent findings suggest that fear generalisation is closely related to hippocampal dependency during retrieval. In this review, we describe the current understanding about memory generalisation and its potential influence in fear attenuation through pharmacological and behavioural interventions. In light of systems consolidation framework, we propose that keeping memory precision could be a key step to enhance therapeutic outcomes.
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Affiliation(s)
- Lizeth K Pedraza
- Laboratório de Neurobiologia da Memória, Biophysics Department, Biosciences Institute, 91.501-970, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.,Department of Physiology, University of Szeged, Szeged, Hungary
| | - Rodrigo O Sierra
- Laboratório de Neurobiologia da Memória, Biophysics Department, Biosciences Institute, 91.501-970, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.,Department of Physiology, University of Szeged, Szeged, Hungary
| | - Lucas de Oliveira Alvares
- Laboratório de Neurobiologia da Memória, Biophysics Department, Biosciences Institute, 91.501-970, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.,Graduate Program in Neuroscience, Institute of Health Sciences, Porto Alegre, Brazil
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11
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Evidence on the impairing effects of Ayahuasca on fear memory reconsolidation. Psychopharmacology (Berl) 2022; 239:3325-3336. [PMID: 36069952 DOI: 10.1007/s00213-022-06217-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 08/22/2022] [Indexed: 10/14/2022]
Abstract
RATIONALE To uncover whether psychedelic drugs attenuate fear memory responses would advance the development of better psychedelic-based treatments for posttraumatic stress disorder (PTSD). Ayahuasca (AYA), a psychedelic brew containing indolamine N, N-dimethyltryptamine (DMT) and β-carbolines, facilitates fear extinction and improves neural plasticity. Upon retrieval, fear memory undergoes labilization and reconsolidation; however, the effects of AYA on this memory stabilization phase are unknown. OBJECTIVES We aimed to investigate the effects of AYA treatment on fear memory reconsolidation. METHODS Fear-conditioned Wistar rats received AYA (60, 120, or 240 mg/kg) or H2O orally via gavage o.g. 20 min before, immediately, or 3 h after a short retrieval session. Analysis of AYA through liquid chromatography-tandem mass spectrometry was used to determine the content of DMT and β-carbolines in AYA. RESULTS AYA impaired fear memory reconsolidation when given 20 min before or 3 h after memory retrieval, with the dose of 60 mg/kg being effective at both moments. This dose of AYA was devoid of anxiolytic effect. Importantly, during retrieval, AYA did not change fear expression. The lack of retrieval abolished the reconsolidation impairing effect of AYA. The effects of AYA treatment 20 min before or 3 h after memory retrieval lasted at least 22 days, suggesting no spontaneous recovery of fear memory. Fear memory impairments induced by AYA treatment, at both moments, do not show reinstatement. CONCLUSIONS Our findings support the view that a low dose of AYA treatment impairs early and late stages of memory reconsolidation instead of facilitating fear extinction.
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12
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Believing is seeing: Development and validation of the STRESS (Subjective Thoughts REgarding Stress Scale) for measuring stress beliefs. PERSONALITY AND INDIVIDUAL DIFFERENCES 2022. [DOI: 10.1016/j.paid.2022.111535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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13
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dos Santos Corrêa M, Grisanti GDV, Franciscatto IAF, Tarumoto TSA, Tiba PA, Ferreira TL, Fornari RV. Remote contextual fear retrieval engages activity from salience network regions in rats. Neurobiol Stress 2022; 18:100459. [PMID: 35601686 PMCID: PMC9118522 DOI: 10.1016/j.ynstr.2022.100459] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 04/22/2022] [Accepted: 05/04/2022] [Indexed: 11/30/2022] Open
Abstract
The ability to retrieve contextual fear memories depends on the coordinated activation of a brain-wide circuitry. Transition from recent to remote memories seems to involve the reorganization of this circuitry, a process called systems consolidation that has been associated with time-dependent fear generalization. However, it is unknown whether emotional memories acquired under different stress levels can undergo different systems consolidation processes. Here, we explored the activation pattern and functional connectivity of key brain regions associated with contextual fear conditioning (CFC) retrieval after recent (2 days) or remote (28 days) memory tests performed in rats submitted to strong (1.0 mA footshock) or mild (0.3 mA footshock) training. We used brain tissue from Wistar rats from a previous study, where we observed that increasing training intensity promotes fear memory generalization over time, possibly due to an increase in corticosterone (CORT) levels during memory consolidation. Analysis of Fos expression across 8 regions of interest (ROIs) allowed us to identify coactivation between them at both timepoints following memory recall. Our results showed that strong CFC elicits higher Fos activation in the anterior insular and prelimbic cortices during remote retrieval, which was positively correlated with freezing along with the basolateral amygdala. Rats trained either with mild or strong CFC showed broad functional connectivity at the recent timepoint whereas only animals submitted to the strong CFC showed a widespread loss of coactivation during remote retrieval. Post-training plasma CORT levels are positively correlated with FOS expression during recent retrieval in strong CFC, but negatively correlated with FOS expression during remote retrieval in mild CFC. Our findings suggest that increasing training intensity results in differential processes of systems consolidation, possibly associated with increased post-training CORT release, and that strong CFC engages activity from the aIC, BLA and PrL - areas associated with the Salience Network in rats - during remote retrieval.
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Affiliation(s)
- Moisés dos Santos Corrêa
- Center for Mathematics, Computing and Cognition (CMCC), Universidade Federal do ABC (UFABC), São Bernardo do Campo, SP, Brazil
| | - Gabriel David Vieira Grisanti
- Center for Mathematics, Computing and Cognition (CMCC), Universidade Federal do ABC (UFABC), São Bernardo do Campo, SP, Brazil
| | | | - Tatiana Suemi Anglas Tarumoto
- Center for Mathematics, Computing and Cognition (CMCC), Universidade Federal do ABC (UFABC), São Bernardo do Campo, SP, Brazil
| | - Paula Ayako Tiba
- Center for Mathematics, Computing and Cognition (CMCC), Universidade Federal do ABC (UFABC), São Bernardo do Campo, SP, Brazil
| | - Tatiana Lima Ferreira
- Center for Mathematics, Computing and Cognition (CMCC), Universidade Federal do ABC (UFABC), São Bernardo do Campo, SP, Brazil
| | - Raquel Vecchio Fornari
- Center for Mathematics, Computing and Cognition (CMCC), Universidade Federal do ABC (UFABC), São Bernardo do Campo, SP, Brazil
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Raut SB, Marathe PA, van Eijk L, Eri R, Ravindran M, Benedek DM, Ursano RJ, Canales JJ, Johnson LR. Diverse therapeutic developments for post-traumatic stress disorder (PTSD) indicate common mechanisms of memory modulation. Pharmacol Ther 2022; 239:108195. [PMID: 35489438 DOI: 10.1016/j.pharmthera.2022.108195] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 04/19/2022] [Accepted: 04/20/2022] [Indexed: 12/20/2022]
Abstract
Post-traumatic stress disorder (PTSD), characterized by abnormally persistent and distressing memories, is a chronic debilitating condition in need of new treatment options. Current treatment guidelines recommend psychotherapy as first line management with only two drugs, sertraline and paroxetine, approved by U.S. Food and Drug Administration (FDA) for treatment of PTSD. These drugs have limited efficacy as they only reduce symptoms related to depression and anxiety without producing permanent remission. PTSD remains a significant public health problem with high morbidity and mortality requiring major advances in therapeutics. Early evidence has emerged for the beneficial effects of psychedelics particularly in combination with psychotherapy for management of PTSD, including psilocybin, MDMA, LSD, cannabinoids, ayahuasca and ketamine. MDMA and psilocybin reduce barrier to therapy by increasing trust between therapist and patient, thus allowing for modification of trauma related memories. Furthermore, research into the memory reconsolidation mechanisms has allowed for identification of various pharmacological targets to disrupt abnormally persistent memories. A number of pre-clinical and clinical studies have investigated novel and re-purposed pharmacological agents to disrupt fear memory in PTSD. Novel therapeutic approaches like neuropeptide Y, oxytocin, cannabinoids and neuroactive steroids have also shown potential for PTSD treatment. Here, we focus on the role of fear memory in the pathophysiology of PTSD and propose that many of these new therapeutic strategies produce benefits through the effect on fear memory. Evaluation of recent research findings suggests that while a number of drugs have shown promising results in preclinical studies and pilot clinical trials, the evidence from large scale clinical trials would be needed for these drugs to be incorporated in clinical practice.
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Affiliation(s)
- Sanket B Raut
- Schools of Psychological Sciences, College of Health and Medicine, University of Tasmania, TAS 7250, Australia
| | - Padmaja A Marathe
- Department of Pharmacology and Therapeutics, Seth GS Medical College & KEM Hospital, Parel, Mumbai 400 012, India
| | - Liza van Eijk
- Department of Psychology, College of Healthcare Sciences, James Cook University, QLD 4811, Australia
| | - Rajaraman Eri
- Health Sciences, College of Health and Medicine, University of Tasmania, TAS 7250, Australia
| | - Manoj Ravindran
- Medicine, College of Health and Medicine, University of Tasmania, TAS 7250, Australia; Department of Psychiatry, North-West Private Hospital, Burnie TAS 7320, Australia
| | - David M Benedek
- Centre for the Study of Traumatic Stress, Department of Psychiatry, Uniformed Services University School of Medicine, Bethesda, MD 20814, USA
| | - Robert J Ursano
- Centre for the Study of Traumatic Stress, Department of Psychiatry, Uniformed Services University School of Medicine, Bethesda, MD 20814, USA
| | - Juan J Canales
- Schools of Psychological Sciences, College of Health and Medicine, University of Tasmania, TAS 7250, Australia
| | - Luke R Johnson
- Schools of Psychological Sciences, College of Health and Medicine, University of Tasmania, TAS 7250, Australia; Centre for the Study of Traumatic Stress, Department of Psychiatry, Uniformed Services University School of Medicine, Bethesda, MD 20814, USA.
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15
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Scienza-Martin K, Lotz FN, Zanona QK, Santana-Kragelund F, Crestani AP, Boos FZ, Calcagnotto ME, Quillfeldt JA. Memory consolidation depends on endogenous hippocampal levels of anandamide: CB1 and M4, but possibly not TRPV1 receptors mediate AM404 effects. Neuroscience 2022; 497:53-72. [DOI: 10.1016/j.neuroscience.2022.04.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 03/14/2022] [Accepted: 04/08/2022] [Indexed: 11/15/2022]
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16
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Mello e Souza T. Unraveling molecular and system processes for fear memory. Neuroscience 2022; 497:14-29. [DOI: 10.1016/j.neuroscience.2022.03.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 03/02/2022] [Accepted: 03/14/2022] [Indexed: 11/26/2022]
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17
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Riccardi E, Blasi E, Zwergel C, Mai A, Morena M, Campolongo P. Sex-dependent Effects of the Drugs of Abuse Amphetamine and the Smart Drug 3,4-Methylenedioxypyrovalerone on Fear Memory Generalization in Rats. Neuroscience 2021; 497:107-117. [PMID: 34968670 DOI: 10.1016/j.neuroscience.2021.12.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 12/19/2021] [Accepted: 12/21/2021] [Indexed: 11/24/2022]
Abstract
In recent years there has been an increase in the development of new synthetic drugs, among which the "bath salt" 3,4-methylenedioxypyrovalerone (MDPV), a psychostimulant with a mechanism of action similar to those of cocaine and amphetamine, stands out. Drugs of abuse have been consistently shown to affect memory function in male rodents. We have recently shown that amphetamine and MDPV induce generalization of fear memory in an inhibitory avoidance discrimination task in male rats. Although abuse of illicit drugs is more prevalent in men than in women, several studies have demonstrated that females are more vulnerable to the effects of drugs of abuse than males and the effects caused by substance dependence on memory in females are still under-investigated. Thus, we examined the effects of subchronic amphetamine or MDPV administrations on memory in a contextual fear conditioning/generalization paradigm in adult male and female rats. Animals were given daily subchronic injections of the drugs, starting 6 days prior the beginning of the behavioral procedures until the end of the paradigm. On day 1 of the experimental protocol, all rats were exposed to a safe context and, the day after, to a slightly different chamber where they received an unsignaled footshock. Twenty-four and forty-eight hours later, freezing behavior and emission of 22 kHz-ultrasonic vocalizations (USVs) were measured in the two different contexts to assess fear memory retention and generalization. Our results indicate that MDPV treatment altered freezing in both sexes, USVs were affected by amphetamine in males while by MDPV in females.
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Affiliation(s)
- Eleonora Riccardi
- Dept. of Physiology and Pharmacology, Sapienza University of Rome, 00185 Rome, Italy; European Center for Brain Research (CERC), Santa Lucia Foundation, 00143 Rome, Italy
| | - Eleonora Blasi
- Dept. of Physiology and Pharmacology, Sapienza University of Rome, 00185 Rome, Italy; European Center for Brain Research (CERC), Santa Lucia Foundation, 00143 Rome, Italy
| | - Clemens Zwergel
- Dept. of Drug Chemistry & Technologies, Sapienza University of Rome, 00185 Rome, Italy; Dept. of Precision Medicine, University of Campania Luigi Vanvitelli, 80138 Naples, Italy
| | - Antonello Mai
- Dept. of Drug Chemistry & Technologies, Sapienza University of Rome, 00185 Rome, Italy
| | - Maria Morena
- Dept. of Physiology and Pharmacology, Sapienza University of Rome, 00185 Rome, Italy; European Center for Brain Research (CERC), Santa Lucia Foundation, 00143 Rome, Italy
| | - Patrizia Campolongo
- Dept. of Physiology and Pharmacology, Sapienza University of Rome, 00185 Rome, Italy; European Center for Brain Research (CERC), Santa Lucia Foundation, 00143 Rome, Italy.
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18
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Gazarini L, Stern CA, Takahashi RN, Bertoglio LJ. Interactions of Noradrenergic, Glucocorticoid and Endocannabinoid Systems Intensify and Generalize Fear Memory Traces. Neuroscience 2021; 497:118-133. [PMID: 34560200 DOI: 10.1016/j.neuroscience.2021.09.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 09/09/2021] [Accepted: 09/13/2021] [Indexed: 12/13/2022]
Abstract
Systemic administration of drugs that activate the noradrenergic or glucocorticoid system potentiates aversive memory consolidation and reconsolidation. The opposite happens with the stimulation of endocannabinoid signaling under certain conditions. An unbalance of these interacting neurotransmitters can lead to the formation and maintenance of traumatic memories, whose strength and specificity attributes are often maladaptive. Here we aimed to investigate whether originally low-intensity and precise contextual fear memories would turn similar to traumatic ones in rats systemically administered with adrenaline, corticosterone, and/or the cannabinoid type-1 receptor antagonist/inverse agonist AM251 during consolidation or reconsolidation. The high dose of each pharmacological agent evaluated significantly increased freezing times at test in the conditioning context one and nine days later when given alone post-acquisition or post-retrieval. Their respective low dose produced no relative changes when given separately, but co-treatment of adrenaline with corticosterone or AM251 and the three drugs combined, but not corticosterone with AM251, produced results equivalent to those mentioned initially. Neither the high nor the low dose of adrenaline, corticosterone, or AM251 altered freezing times at test in a novel, neutral context two and ten days later. In contrast, animals receiving the association of their low dose exhibited significantly higher freezing times than controls. Together, the results indicate that newly acquired and destabilized threat memory traces become more intense and generalized after a combined interference acting synergistically and mimicking that reported in patients presenting stress-related psychiatric conditions.
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Affiliation(s)
- Lucas Gazarini
- Departamento de Farmacologia, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil; Universidade Federal de Mato Grosso do Sul, Três Lagoas, MS, Brazil.
| | - Cristina A Stern
- Departamento de Farmacologia, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil; Departamento de Farmacologia, Universidade Federal do Paraná, Curitiba, PR, Brazil
| | - Reinaldo N Takahashi
- Departamento de Farmacologia, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
| | - Leandro J Bertoglio
- Departamento de Farmacologia, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil.
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19
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Subramaniyan M, Manivannan S, Chelur V, Tsetsenis T, Jiang E, Dani JA. Fear conditioning potentiates the hippocampal CA1 commissural pathway in vivo and increases awake phase sleep. Hippocampus 2021; 31:1154-1175. [PMID: 34418215 PMCID: PMC9290090 DOI: 10.1002/hipo.23381] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 06/10/2021] [Accepted: 07/24/2021] [Indexed: 11/24/2022]
Abstract
The hippocampus is essential for spatial learning and memory. To assess learning we used contextual fear conditioning (cFC), where animals learn to associate a place with aversive events like foot‐shocks. Candidate memory mechanisms for cFC are long‐term potentiation (LTP) and long‐term depression (LTD), but there is little direct evidence of them operating in the hippocampus in vivo following cFC. Also, little is known about the behavioral state changes induced by cFC. To address these issues, we recorded local field potentials in freely behaving mice by stimulating in the left dorsal CA1 region and recording in the right dorsal CA1 region. Synaptic strength in the commissural pathway was monitored by measuring field excitatory postsynaptic potentials (fEPSPs) before and after cFC. After cFC, the commissural pathway's synaptic strength was potentiated. Although recordings occurred during the wake phase of the light/dark cycle, the mice slept more in the post‐conditioning period than in the pre‐conditioning period. Relative to awake periods, in non‐rapid eye movement (NREM) sleep the fEPSPs were larger in both pre‐ and post‐conditioning periods. We also found a significant negative correlation between the animal's speed and fEPSP size. Therefore, to avoid confounds in the fEFSP potentiation estimates, we controlled for speed‐related and sleep‐related fEPSP changes and still found that cFC induced long‐term potentiation, but no significant long‐term depression. Synaptic strength changes were not found in the control group that simply explored the fear‐conditioning chamber, indicating that exploration of the novel place did not produce the measurable effects caused by cFC. These results show that following cFC, the CA1 commissural pathway is potentiated, likely contributing to the functional integration of the left and right hippocampi in fear memory consolidation. In addition, the cFC paradigm produces significant changes in an animal's behavioral state, which are observable as proximal changes in sleep patterns.
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Affiliation(s)
- Manivannan Subramaniyan
- Department of Neuroscience, Mahoney Institute for Neurosciences, Perelman School for Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Sumithrra Manivannan
- Department of Neuroscience, Mahoney Institute for Neurosciences, Perelman School for Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Vikas Chelur
- Department of Neuroscience, Mahoney Institute for Neurosciences, Perelman School for Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Theodoros Tsetsenis
- Department of Neuroscience, Mahoney Institute for Neurosciences, Perelman School for Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Evan Jiang
- Department of Neuroscience, Mahoney Institute for Neurosciences, Perelman School for Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - John A Dani
- Department of Neuroscience, Mahoney Institute for Neurosciences, Perelman School for Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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20
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Dos Santos Corrêa M, Vaz BDS, Menezes BS, Ferreira TL, Tiba PA, Fornari RV. Corticosterone differentially modulates time-dependent fear generalization following mild or moderate fear conditioning training in rats. Neurobiol Learn Mem 2021; 184:107487. [PMID: 34242811 DOI: 10.1016/j.nlm.2021.107487] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 06/06/2021] [Accepted: 07/03/2021] [Indexed: 11/24/2022]
Abstract
Stressful and emotionally arousing experiences create strong memories that seem to lose specificity over time. It is uncertain, however, how the stress system contributes to the phenomenon of time-dependent fear generalization. Here, we investigated whether post-training corticosterone (CORT-HBC) injections, given after different training intensities, affect contextual fear memory specificity at several time points. We trained male Wistar rats on the contextual fear conditioning (CFC) task using two footshock intensities (mild CFC, 3 footshocks of 0.3 mA, or moderate CFC, 3x 0.6 mA) and immediately after the training session we administered CORT-HBC systemically. We first tested the animals in a novel context and then in the training context at different intervals following training (2, 14, 28 or 42 days). By measuring freezing in the novel context and then contrasting freezing times shown in both contexts, we inferred contextual fear generalization for each rat, classifying them into Generalizers or Discriminators. Following mild CFC training, the glucocorticoid injection promoted an accurate contextual memory at the recent time point (2 days), and increase the contextual memory accuracy 28 days after training. In contrast, after the moderate CFC training, CORT-HBC facilitated contextual generalization at 14 days, compared to the control group that maintained contextual discrimination at this timepoint. For this training intensity, however, CORT-HBC did not have any effect on recent memory specificity. These findings indicate that treatment with CORT-HBC immediately after the encoding of mild or moderately arousing experiences may differentially modulate memory consolidation and time-dependent fear generalization.
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Affiliation(s)
- Moisés Dos Santos Corrêa
- Center for Mathematics, Computing and Cognition (CMCC), Universidade Federal do ABC (UFABC), São Bernardo do Campo, SP, Brazil.
| | - Barbara Dos Santos Vaz
- Center for Mathematics, Computing and Cognition (CMCC), Universidade Federal do ABC (UFABC), São Bernardo do Campo, SP, Brazil.
| | - Beatriz Scazufca Menezes
- Center for Mathematics, Computing and Cognition (CMCC), Universidade Federal do ABC (UFABC), São Bernardo do Campo, SP, Brazil.
| | - Tatiana Lima Ferreira
- Center for Mathematics, Computing and Cognition (CMCC), Universidade Federal do ABC (UFABC), São Bernardo do Campo, SP, Brazil.
| | - Paula Ayako Tiba
- Center for Mathematics, Computing and Cognition (CMCC), Universidade Federal do ABC (UFABC), São Bernardo do Campo, SP, Brazil.
| | - Raquel Vecchio Fornari
- Center for Mathematics, Computing and Cognition (CMCC), Universidade Federal do ABC (UFABC), São Bernardo do Campo, SP, Brazil.
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21
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Norepinephrine and glucocorticoid effects on the brain mechanisms underlying memory accuracy and generalization. Mol Cell Neurosci 2020; 108:103537. [DOI: 10.1016/j.mcn.2020.103537] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 07/31/2020] [Accepted: 08/10/2020] [Indexed: 12/19/2022] Open
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22
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Kilby CJ, Sherman KA, Wuthrich VM. A Scoping Review of Stress Beliefs: Literature Integration, Measurement Issues, and Theoretical Concerns. Ann Behav Med 2020; 54:595-610. [PMID: 32103231 DOI: 10.1093/abm/kaaa006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Individual stress beliefs are associated with stress-related behavioral responses and health consequences. The Common-Sense Model of Self-Regulation may help in understanding the role of stress beliefs in these behavioral responses and consequences. PURPOSE To synthesize empirical studies exploring the relationship between stress beliefs and stress-related behavioral responses and health consequences using the Common-Sense Model as a guiding framework. METHODS Peer-reviewed journal articles on stress beliefs in PsycArticles, PsycINFO, PubMed, Scopus, and Sociological Abstracts were included if they were in English, reported on adult humans. Nineteen of the 1,972 unique articles reporting on 24 studies met inclusion criteria. Study quality was assessed with existing reporting criteria. RESULTS Four of the five Common-Sense Model representations were included across the review studies, namely Identity, Cause, Consequences, and Control. Consequences and Control-related stress beliefs are associated with stress-based health and behavioral outcomes. One study explored Identity-related stress beliefs with health outcomes, reporting no relationship. No study assessed the relationship between Cause-related stress beliefs and behaviors or health outcomes. No study has explored any aspect of Timeline-related stress beliefs. Study quality ranged from very low to very high. CONCLUSIONS There is limited evidence exploring stress-related beliefs and behaviors and health outcomes. According to the Common-Sense Model, the Timeline representations remains to be investigated in the stress context, and Identity and Cause are under-researched. This review highlights future directions for stress beliefs research.
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Affiliation(s)
- Christopher J Kilby
- Centre for Emotional Health, Department of Psychology, Macquarie University, Sydney, NSW, Australia
| | - Kerry A Sherman
- Centre for Emotional Health, Department of Psychology, Macquarie University, Sydney, NSW, Australia
| | - Viviana M Wuthrich
- Centre for Emotional Health, Department of Psychology, Macquarie University, Sydney, NSW, Australia
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Abstract
While in the past much of our knowledge about memory representations in the brain has relied on loss-of-function studies in which whole brain regions were temporarily inactivated or permanently lesioned, the recent development of new methods has ushered in a new era of downright "engram excitement." Animal research is now able to specifically label, track, and manipulate engram cells in the brain. While early studies have mostly focused on single brain regions like the hippocampus, recently more and more evidence for brain-wide distributed engram networks is emerging. Memory research in humans has also picked up pace, fueled by promising magnetic resonance imaging (MRI)-based methods like diffusion-weighted MRI (DW-MRI) and brain decoding. In this review, we will outline recent advancements in engram research, with a focus on human data and neocortical representations. We will illustrate the available noninvasive methods for the detection of engrams in different neocortical regions like the medial prefrontal cortex and the posterior parietal cortex and discuss evidence for systems consolidation and parallel memory encoding. Finally, we will explore how reactivation and prior knowledge can lead to and enhance engram formation in the neocortex.
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24
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Dos Santos Corrêa M, Vaz BDS, Grisanti GDV, de Paiva JPQ, Tiba PA, Fornari RV. Relationship between footshock intensity, post-training corticosterone release and contextual fear memory specificity over time. Psychoneuroendocrinology 2019; 110:104447. [PMID: 31561085 DOI: 10.1016/j.psyneuen.2019.104447] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 08/09/2019] [Accepted: 09/13/2019] [Indexed: 12/23/2022]
Abstract
Overgeneralized fear has long been implicated in generalized anxiety and post-traumatic stress disorder, however, time-dependent mechanisms underlying memory retrieval are still not completely understood. Previous studies have revealed that stronger fear conditioning training protocols are associated with both increased post-training corticosterone (CORT) levels and fear responses at later retrieval tests. Here we used contextual fear conditioning (CFC) to investigate the relationship between post-training CORT levels and memory specificity in different retrieval timepoints. Wistar rats were exposed to CFC training with increasing footshock intensities (0.3, 0.6 or 1.0mA) and had their blood collected 30 min afterwards to measure post-training plasma CORT. After 2, 14 or 28 days, rats were tested for memory specificity either in the training or in the novel context. Regression analysis was used to verify linear and non-linear interactions between CORT levels and freezing. Higher footshock intensities increased post-training CORT levels and freezing times during tests in all timepoints. Moreover, stronger trainings elicited faster memory generalization, which was associated with higher CORT levels during memory consolidation. The 0.3mA training maintained memory specificity up to 28 days. Additionally, linear regressions suggest that the shift from specific to generalized memories is underway at 14 days after training. These results are consistent with the hypotheses that stronger training protocols elicit a faster generalization rate, and that this process is associated with increased post-training CORT release.
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Affiliation(s)
- Moisés Dos Santos Corrêa
- Centro de Matemática, Computação e Cognição (CMCC), Universidade Federal do ABC (UFABC), São Bernardo do Campo, SP, Brazil
| | - Barbara Dos Santos Vaz
- Centro de Matemática, Computação e Cognição (CMCC), Universidade Federal do ABC (UFABC), São Bernardo do Campo, SP, Brazil
| | - Gabriel David Vieira Grisanti
- Centro de Matemática, Computação e Cognição (CMCC), Universidade Federal do ABC (UFABC), São Bernardo do Campo, SP, Brazil
| | | | - Paula Ayako Tiba
- Centro de Matemática, Computação e Cognição (CMCC), Universidade Federal do ABC (UFABC), São Bernardo do Campo, SP, Brazil
| | - Raquel Vecchio Fornari
- Centro de Matemática, Computação e Cognição (CMCC), Universidade Federal do ABC (UFABC), São Bernardo do Campo, SP, Brazil.
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25
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Quillfeldt JA. Temporal Flexibility of Systems Consolidation and the Synaptic Occupancy/Reset Theory (SORT): Cues About the Nature of the Engram. Front Synaptic Neurosci 2019; 11:1. [PMID: 30814946 PMCID: PMC6381034 DOI: 10.3389/fnsyn.2019.00001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 01/14/2019] [Indexed: 11/24/2022] Open
Abstract
The ability to adapt to new situations involves behavioral changes expressed either from an innate repertoire, or by acquiring experience through memory consolidation mechanisms, by far a much richer and flexible source of adaptation. Memory formation consists of two interrelated processes that take place at different spatial and temporal scales, Synaptic Consolidation, local plastic changes in the recruited neurons, and Systems Consolidation, a process of gradual reorganization of the explicit/declarative memory trace between hippocampus and the neocortex. In this review, we summarize some converging experimental results from our lab that support a normal temporal framework of memory systems consolidation as measured both from the anatomical and the psychological points of view, and propose a hypothetical model that explains these findings while predicting other phenomena. Then, the same experimental design was repeated interposing additional tasks between the training and the remote test to verify for any interference: we found that (a) when the animals were subject to a succession of new learnings, systems consolidation was accelerated, with the disengagement of the hippocampus taking place before the natural time point of this functional switch, but (b) when a few reactivation sessions reexposed the animal to the training context without the shock, systems consolidation was delayed, with the hippocampus prolonging its involvement in retrieval. We hypothesize that new learning recruits from a fixed number of plastic synapses in the CA1 area to store the engram index, while reconsolidation lead to a different outcome, in which additional synapses are made available. The first situation implies the need of a reset mechanism in order to free synapses needed for further learning, and explains the acceleration observed under intense learning activity, while the delay might be explained by a different process, able to generate extra free synapses: depending on the cognitive demands, it deals either with a fixed or a variable pool of available synapses. The Synaptic Occupancy/Reset Theory (SORT) emerged as an explanation for the temporal flexibility of systems consolidation, to encompass the two different dynamics of explicit memories, as well as to bridge both synaptic and systems consolidation in one single mechanism.
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Affiliation(s)
- Jorge Alberto Quillfeldt
- Psychobiology and Neurocomputation Lab, Department of Biophysics, Institute of Biosciences, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.,Neurosciences Graduate Program, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.,Department of Psychology, McGill University, Montreal, QC, Canada
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26
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Pedraza LK, Sierra RO, Giachero M, Nunes-Souza W, Lotz FN, de Oliveira Alvares L. Chronic fluoxetine prevents fear memory generalization and enhances subsequent extinction by remodeling hippocampal dendritic spines and slowing down systems consolidation. Transl Psychiatry 2019; 9:53. [PMID: 30705259 PMCID: PMC6355903 DOI: 10.1038/s41398-019-0371-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Revised: 11/16/2018] [Accepted: 01/01/2019] [Indexed: 11/11/2022] Open
Abstract
Fear memory overgeneralization contributes to the genesis and persistence of anxiety disorders and is a central hallmark in the pathophysiology of post-traumatic stress disorder (PTSD). Recent findings suggest that fear generalization is closely related to hippocampal dependency during retrieval. The selective serotonin reuptake inhibitor (SSRI) fluoxetine has been used as a first-line treatment for PTSD; however, how it exerts its therapeutic effect remains a matter of debate. Here, using contextual fear conditioning in rats, we show that chronic fluoxetine treatment prevents fear generalization and enhances subsequent extinction. Moreover, fluoxetine treatment after extinction prevents spontaneous recovery. The mechanism through which fluoxetine affects generalization and extinction seems to be through the postponement of systems consolidation, thereby maintaining hippocampal involvement during retrieval. Such an effect relies on a remodeling of dendritic spines in the hippocampus, as well as the number of mature, mushroom-type spines promoted by fluoxetine treatment. In order to further investigate whether fear generalization is a potential predictor of extinction effectiveness, we categorized a large naive population according to their generalization rate. We found that discriminator rats showed a better extinction profile compared to generalizers, suggesting that the generalization rate predicts extinction effectiveness. Hence, we propose that the therapeutic strategy of choice should take into account the extension of memory generalization, in which therapies based on extinction could induce a better outcome in patients who present less fear overgeneralization. These results open new avenues for the development of interventions that prevent fear generalization by maintaining memory dependency of the hippocampus.
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Affiliation(s)
- Lizeth K. Pedraza
- Laboratório de Neurobiologia da Memória, Biosciences Institute, Porto Alegre, 91.501-970 Brazil ,0000 0001 2200 7498grid.8532.cGraduate Program in Neuroscience, Institute of Health Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, 90.046-900 Brazil
| | - Rodrigo O. Sierra
- 0000 0001 2200 7498grid.8532.cGraduate Program in Neuroscience, Institute of Health Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, 90.046-900 Brazil ,Laboratório de Psicobiologia e Neurocomputação, Biophysics Department, Biosciences Institute, Porto Alegre, 91.501-970 Brazil
| | - Marcelo Giachero
- 0000 0001 2188 7235grid.411237.2Department of Pharmacology, Federal University of Santa Catarina, Florianópolis, Brazil
| | - Walquiria Nunes-Souza
- 0000 0001 2200 7498grid.8532.cGraduate Program in Neuroscience, Institute of Health Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, 90.046-900 Brazil
| | - Fernanda N. Lotz
- Laboratório de Psicobiologia e Neurocomputação, Biophysics Department, Biosciences Institute, Porto Alegre, 91.501-970 Brazil
| | - Lucas de Oliveira Alvares
- Laboratório de Neurobiologia da Memória, Biosciences Institute, Porto Alegre, 91.501-970, Brazil. .,Graduate Program in Neuroscience, Institute of Health Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, 90.046-900, Brazil.
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Kilby CJ, Sherman KA, Wuthrich V. Towards understanding interindividual differences in stressor appraisals: A systematic review. PERSONALITY AND INDIVIDUAL DIFFERENCES 2018. [DOI: 10.1016/j.paid.2018.07.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Lopes da Cunha P, Villar ME, Ballarini F, Tintorelli R, Ana María Viola H. Spatial object recognition memory formation under acute stress. Hippocampus 2018; 29:491-499. [PMID: 30295349 DOI: 10.1002/hipo.23037] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 09/12/2018] [Accepted: 09/17/2018] [Indexed: 01/30/2023]
Abstract
Stress is known to have a critical impact on memory processes. In the present work, we focus on the effects of an acute stress event closely associated to an unrelated learning task. Here, we show that acute stress (elevated platform [EP] session) experienced 1 hr after a weak spatial object recognition (SOR) training, which only induces a short-term memory (STM), promoted the formation of SOR-long term memory (SOR-LTM) in rats. The effect induced by stress was dependent on the activation of glucocorticoid- and mineralocorticoid-receptors, brain-derived neurotrophic factor (BDNF) and protein synthesis in the dorsal hippocampus. In contrast, EP after a strong SOR impaired SOR-LTM probably by interfering with the use of necessary resources. Moreover, we show that the EP session before training induced anterograde interference, which it was not reversed by a subsequent exposure to an open field. Our findings provide novel insights into the impact of stress on LTM formation in rodents and they are discussed under the behavioral analogue of the synaptic tagging and capture hypothesis.
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Affiliation(s)
- Pamela Lopes da Cunha
- Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina.,Instituto de Biología Celular y Neurociencias "Dr Eduardo De Robertis" (IBCN), CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Maria Eugenia Villar
- Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina.,Instituto de Biología Celular y Neurociencias "Dr Eduardo De Robertis" (IBCN), CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Fabricio Ballarini
- Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina.,Instituto de Biología Celular y Neurociencias "Dr Eduardo De Robertis" (IBCN), CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Ramiro Tintorelli
- Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina.,Instituto de Biología Celular y Neurociencias "Dr Eduardo De Robertis" (IBCN), CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Haydée Ana María Viola
- Instituto de Biología Celular y Neurociencias "Dr Eduardo De Robertis" (IBCN), CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina.,Departamento de Fisiología, Biología Molecular y Celular "Dr. Hector Maldonado" (FBMC), Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales, Buenos Aires, Argentina
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29
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Doron A, Goshen I. Investigating the transition from recent to remote memory using advanced tools. Brain Res Bull 2018; 141:35-43. [DOI: 10.1016/j.brainresbull.2017.09.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2017] [Revised: 08/27/2017] [Accepted: 09/11/2017] [Indexed: 11/30/2022]
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Periodical reactivation under the effect of caffeine attenuates fear memory expression in rats. Sci Rep 2018; 8:7260. [PMID: 29740084 PMCID: PMC5940846 DOI: 10.1038/s41598-018-25648-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Accepted: 04/20/2018] [Indexed: 11/17/2022] Open
Abstract
In the last decade, several studies have shown that fear memories can be attenuated by interfering with reconsolidation. However, most of the pharmacological agents used in preclinical studies cannot be administered to humans. Caffeine is one of the world’s most popular psychoactive drugs and its effects on cognitive and mood states are well documented. Nevertheless, the influence of caffeine administration on fear memory processing is not as clear. We employed contextual fear conditioning in rats and acute caffeine administration under a standard memory reconsolidation protocol or periodical memory reactivation. Additionally, potential rewarding/aversion and anxiety effects induced by caffeine were evaluated by conditioning place preference or open field, respectively. Caffeine administration was able to attenuate weak fear memories in a standard memory reconsolidation protocol; however, periodical memory reactivation under caffeine effect was necessary to attenuate strong and remote memories. Moreover, caffeine promoted conditioned place preference and anxiolytic-like behavior, suggesting that caffeine weakens the initial learning during reactivation through counterconditioning mechanisms. Thus, our study shows that rewarding and anxiolytic effects of caffeine during fear reactivation can change the emotional valence of fear memory. It brings a new promising pharmacological approach based on drugs widely used such as caffeine to treat fear-related disorders.
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31
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Crestani AP, Sierra RO, Machado A, Haubrich J, Scienza KM, de Oliveira Alvares L, Quillfeldt JA. Hippocampal plasticity mechanisms mediating experience-dependent learning change over time. Neurobiol Learn Mem 2018; 150:56-63. [PMID: 29501525 DOI: 10.1016/j.nlm.2018.02.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 01/02/2018] [Accepted: 02/19/2018] [Indexed: 01/15/2023]
Abstract
The requirement of NMDA receptor (NMDAR) activity for memory formation is well described. However, the plasticity mechanisms for memory can be modified by experience, such that a future similar learning becomes independent of NMDARs. This effect has often been reported in learning events conducted with a few days interval. In this work, we asked whether the NMDAR-independency is permanent or the brain regions and plasticity mechanisms of experience-dependent learning may change over time. Considering that contextual memories undergo a gradual reorganization over time, becoming progressively independent from the hippocampus and dependent upon cortical regions, we investigated the brain regions mediating a new related learning conducted at a remote time-point, when the first memory was already cortically established. First, we demonstrated that anterior cingulate cortex was not able to support a learning subsequent to a previous systems-level consolidated memory; it did require at least one functional subregion of the hippocampus (ventral or dorsal). Moreover, after replicating findings showing that a few days interval between trainings induces a NMDAR-independent learning, we managed to show that a learning following a longer interval once again becomes dependent on NMDARs in the hippocampus. These findings suggest that while the previous memory grows independent from the hippocampus over time, an experience-dependent learning following a systems-consolidated memory once again engages the hippocampus and a NMDAR-dependent plasticity mechanism.
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Affiliation(s)
- Ana Paula Crestani
- Psychobiology and Neurocomputation Lab, Biophysics Department, Bioscience Institute, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil; Neurosciences Graduate Program, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Rodrigo Ordoñez Sierra
- Psychobiology and Neurocomputation Lab, Biophysics Department, Bioscience Institute, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil; Neurosciences Graduate Program, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Adriano Machado
- Psychobiology and Neurocomputation Lab, Biophysics Department, Bioscience Institute, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil; Neurosciences Graduate Program, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Josué Haubrich
- Psychobiology and Neurocomputation Lab, Biophysics Department, Bioscience Institute, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil; Neurosciences Graduate Program, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Krislei Martin Scienza
- Psychobiology and Neurocomputation Lab, Biophysics Department, Bioscience Institute, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil; Neurosciences Graduate Program, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Lucas de Oliveira Alvares
- Neurosciences Graduate Program, Federal University of Rio Grande do Sul, Porto Alegre, Brazil; Neurobiology of Memory Lab, Biophysics Department, Bioscience Institute, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Jorge Alberto Quillfeldt
- Psychobiology and Neurocomputation Lab, Biophysics Department, Bioscience Institute, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil; Neurosciences Graduate Program, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.
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Kruse O, Tapia León I, Stalder T, Stark R, Klucken T. Altered reward learning and hippocampal connectivity following psychosocial stress. Neuroimage 2017; 171:15-25. [PMID: 29288866 DOI: 10.1016/j.neuroimage.2017.12.076] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2017] [Revised: 12/20/2017] [Accepted: 12/22/2017] [Indexed: 12/11/2022] Open
Abstract
Acute stress has a profound influence on learning, as has been demonstrated in verbal learning or fear conditioning. However, its effect on appetitive conditioning is still unclear. Fear conditioning research suggests the possibility of overgeneralization of conditioning to the CS- under acute stress due to its effect on prefrontal and hippocampal processing. In this study, participants (N = 56 males) were subjected to the Trier Social Stress Test or a placebo version. After that, all participants underwent an appetitive conditioning paradigm in the fMRI, in which one neutral cue (CS+) was repeatedly paired with reward, while another (CS-) was not. Importantly, the stress-group revealed overgeneralization of conditioning to the CS- on the behavioral level. On the neural level, stressed participants showed increased connectivity between the hippocampus and amygdala, vACC, and OFC, which maintain specificity of conditioning and also showed reduced differential activation. The results indicate overgeneralization of appetitive conditioning promoted by maladaptive balancing of pattern separation and pattern completion in the hippocampus under acute stress and are discussed with respect to clinical implications.
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Affiliation(s)
- Onno Kruse
- Department of Psychotherapy and Systems Neuroscience, Justus Liebig University Giessen, Otto-Behaghel-Str. 10H, 35394 Giessen, Germany; Bender Institute for Neuroimaging (BION), Justus Liebig University Giessen, Otto-Behaghel-Str. 10H, 35394 Giessen, Germany; Department of Clinical Psychology, University of Siegen, Adolf-Reichwein-Str. 2a, 57076 Siegen, Germany.
| | - Isabell Tapia León
- Bender Institute for Neuroimaging (BION), Justus Liebig University Giessen, Otto-Behaghel-Str. 10H, 35394 Giessen, Germany; Department of Clinical Psychology, University of Siegen, Adolf-Reichwein-Str. 2a, 57076 Siegen, Germany.
| | - Tobias Stalder
- Department of Clinical Psychology, University of Siegen, Adolf-Reichwein-Str. 2a, 57076 Siegen, Germany.
| | - Rudolf Stark
- Department of Psychotherapy and Systems Neuroscience, Justus Liebig University Giessen, Otto-Behaghel-Str. 10H, 35394 Giessen, Germany; Bender Institute for Neuroimaging (BION), Justus Liebig University Giessen, Otto-Behaghel-Str. 10H, 35394 Giessen, Germany.
| | - Tim Klucken
- Bender Institute for Neuroimaging (BION), Justus Liebig University Giessen, Otto-Behaghel-Str. 10H, 35394 Giessen, Germany; Department of Clinical Psychology, University of Siegen, Adolf-Reichwein-Str. 2a, 57076 Siegen, Germany.
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Sierra RO, Pedraza LK, Zanona QK, Santana F, Boos FZ, Crestani AP, Haubrich J, de Oliveira Alvares L, Calcagnotto ME, Quillfeldt JA. 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. Hippocampus 2017; 27:596-607. [DOI: 10.1002/hipo.22715] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/03/2017] [Indexed: 01/18/2023]
Affiliation(s)
- Rodrigo O. Sierra
- Psychobiology and Neurocomputing Lab; Biophysics Department, IB, CEP 91.501-970, Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
- Graduate Program in Neuroscience; ICBS, CEP 90.046-900, Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
| | - Lizeth K. Pedraza
- Graduate Program in Neuroscience; ICBS, CEP 90.046-900, Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
- Neurobiology of Memory Lab; Biophysics Department, IB, CEP 91.501-970, Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
| | - Querusche K. Zanona
- Psychobiology and Neurocomputing Lab; Biophysics Department, IB, CEP 91.501-970, Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
- Graduate Program in Neuroscience; ICBS, CEP 90.046-900, Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
| | - Fabiana Santana
- Psychobiology and Neurocomputing Lab; Biophysics Department, IB, CEP 91.501-970, Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
- Graduate Program in Neuroscience; ICBS, CEP 90.046-900, Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
| | - Flávia Z. Boos
- Psychobiology and Neurocomputing Lab; Biophysics Department, IB, CEP 91.501-970, Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
- Graduate Program in Neuroscience; ICBS, CEP 90.046-900, Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
| | - Ana P. Crestani
- Psychobiology and Neurocomputing Lab; Biophysics Department, IB, CEP 91.501-970, Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
- Graduate Program in Neuroscience; ICBS, CEP 90.046-900, Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
| | - Josué Haubrich
- Psychobiology and Neurocomputing Lab; Biophysics Department, IB, CEP 91.501-970, Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
- Graduate Program in Neuroscience; ICBS, CEP 90.046-900, Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
| | - Lucas de Oliveira Alvares
- Graduate Program in Neuroscience; ICBS, CEP 90.046-900, Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
- Neurobiology of Memory Lab; Biophysics Department, IB, CEP 91.501-970, Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
| | - Maria Elisa Calcagnotto
- Graduate Program in Neuroscience; ICBS, CEP 90.046-900, Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
- Neurophysiology and Neurochemistry of Neuronal Excitability and Synaptic Plasticity Lab; Biochemistry Department, ICBS, CEP 90.030-003, Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
| | - Jorge A. Quillfeldt
- Psychobiology and Neurocomputing Lab; Biophysics Department, IB, CEP 91.501-970, Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
- Graduate Program in Neuroscience; ICBS, CEP 90.046-900, Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
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34
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Pedraza LK, Sierra RO, Crestani AP, Quillfeldt JA, de Oliveira Alvares L. Sequential learning during contextual fear conditioning guides the rate of systems consolidation: Implications for consolidation of multiple memory traces. Hippocampus 2017; 27:518-528. [DOI: 10.1002/hipo.22708] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2016] [Revised: 01/05/2017] [Accepted: 01/12/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Lizeth K. Pedraza
- Laboratório de Neurobiologia da Memória; Biophysics Department, Biosciences Institute, Universidade Federal do Rio Grande do Sul; Porto Alegre RS, Brazil
- Institute of Health Sciences, Graduate Program in Neuroscience; Universidade Federal do Rio Grande do Sul; Porto Alegre RS, Brazil
| | - Rodrigo O. Sierra
- Institute of Health Sciences, Graduate Program in Neuroscience; Universidade Federal do Rio Grande do Sul; Porto Alegre RS, Brazil
- Laboratório de Psicobiologia e Neurocomputação, Biophysics Department; Biosciences Institute, Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
| | - Ana P. Crestani
- Institute of Health Sciences, Graduate Program in Neuroscience; Universidade Federal do Rio Grande do Sul; Porto Alegre RS, Brazil
- Laboratório de Psicobiologia e Neurocomputação, Biophysics Department; Biosciences Institute, Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
| | - Jorge A. Quillfeldt
- Institute of Health Sciences, Graduate Program in Neuroscience; Universidade Federal do Rio Grande do Sul; Porto Alegre RS, Brazil
- Laboratório de Psicobiologia e Neurocomputação, Biophysics Department; Biosciences Institute, Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
| | - Lucas de Oliveira Alvares
- Laboratório de Neurobiologia da Memória; Biophysics Department, Biosciences Institute, Universidade Federal do Rio Grande do Sul; Porto Alegre RS, Brazil
- Institute of Health Sciences, Graduate Program in Neuroscience; Universidade Federal do Rio Grande do Sul; Porto Alegre RS, Brazil
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35
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Engelke DS, Filev R, Mello LE, Santos-Junior JG. Evidence of memory generalization in contextual locomotor sensitization induced by amphetamine. Behav Brain Res 2017; 317:522-527. [DOI: 10.1016/j.bbr.2016.10.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 10/06/2016] [Accepted: 10/09/2016] [Indexed: 10/20/2022]
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36
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Schwabe L. Memory under stress: from single systems to network changes. Eur J Neurosci 2016; 45:478-489. [PMID: 27862513 DOI: 10.1111/ejn.13478] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 11/07/2016] [Accepted: 11/07/2016] [Indexed: 02/06/2023]
Abstract
Stressful events have profound effects on learning and memory. These effects are mainly mediated by catecholamines and glucocorticoid hormones released from the adrenals during stressful encounters. It has been known for long that both catecholamines and glucocorticoids influence the functioning of the hippocampus, a critical hub for episodic memory. However, areas implicated in other forms of memory, such as the insula or the dorsal striatum, can be affected by stress as well. Beyond changes in single memory systems, acute stress triggers the reconfiguration of large scale neural networks which sets the stage for a shift from thoughtful, 'cognitive' control of learning and memory toward more reflexive, 'habitual' processes. Stress-related alterations in amygdala connectivity with the hippocampus, dorsal striatum, and prefrontal cortex seem to play a key role in this shift. The bias toward systems proficient in threat processing and the implementation of well-established routines may facilitate coping with an acute stressor. Overreliance on these reflexive systems or the inability to shift flexibly between them, however, may represent a risk factor for psychopathology in the long-run.
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Affiliation(s)
- Lars Schwabe
- Department of Cognitive Psychology, Institute of Psychology, University of Hamburg, Von-Melle-Park 5, 20146, Hamburg, Germany
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Haubrich J, Cassini LF, Diehl F, Santana F, Fürstenau de Oliveira L, de Oliveira Alvares L, Quillfeldt JA. Novel learning accelerates systems consolidation of a contextual fear memory. Hippocampus 2016; 26:924-32. [DOI: 10.1002/hipo.22575] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/04/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Josue Haubrich
- Departamento de Biofísica, Laboratório de Psicobiologia e Neurocomputação, Instituto de Biociências; Universidade Federal do Rio Grande do Sul-Porto Alegre; RS Brazil
- Programa de Pós-Graduação em Neurociências, Instituto de Ciências Básicas Da Saúde; Universidade Federal do Rio Grande do Sul-Porto Alegre; RS Brazil
| | - Lindsey Freitas Cassini
- Departamento de Biofísica, Laboratório de Psicobiologia e Neurocomputação, Instituto de Biociências; Universidade Federal do Rio Grande do Sul-Porto Alegre; RS Brazil
- Programa de Pós-Graduação em Neurociências, Instituto de Ciências Básicas Da Saúde; Universidade Federal do Rio Grande do Sul-Porto Alegre; RS Brazil
| | - Felipe Diehl
- Departamento de Biofísica, Laboratório de Psicobiologia e Neurocomputação, Instituto de Biociências; Universidade Federal do Rio Grande do Sul-Porto Alegre; RS Brazil
- Programa de Pós-Graduação em Neurociências, Instituto de Ciências Básicas Da Saúde; Universidade Federal do Rio Grande do Sul-Porto Alegre; RS Brazil
| | - Fabiana Santana
- Departamento de Biofísica, Laboratório de Psicobiologia e Neurocomputação, Instituto de Biociências; Universidade Federal do Rio Grande do Sul-Porto Alegre; RS Brazil
- Programa de Pós-Graduação em Neurociências, Instituto de Ciências Básicas Da Saúde; Universidade Federal do Rio Grande do Sul-Porto Alegre; RS Brazil
| | - Lucas Fürstenau de Oliveira
- Departamento de Biofísica, Laboratório de Psicobiologia e Neurocomputação, Instituto de Biociências; Universidade Federal do Rio Grande do Sul-Porto Alegre; RS Brazil
- Programa de Pós-Graduação em Neurociências, Instituto de Ciências Básicas Da Saúde; Universidade Federal do Rio Grande do Sul-Porto Alegre; RS Brazil
| | - Lucas de Oliveira Alvares
- Departamento de Biofísica, Laboratório de Psicobiologia e Neurocomputação, Instituto de Biociências; Universidade Federal do Rio Grande do Sul-Porto Alegre; RS Brazil
- Programa de Pós-Graduação em Neurociências, Instituto de Ciências Básicas Da Saúde; Universidade Federal do Rio Grande do Sul-Porto Alegre; RS Brazil
- Departamento de Biofísica, Laboratório de Neurobiologia da Memória, Instituto de Biociências; Universidade Federal Do Rio Grande do Sul-Porto Alegre; RS Brazil
| | - Jorge Alberto Quillfeldt
- Departamento de Biofísica, Laboratório de Psicobiologia e Neurocomputação, Instituto de Biociências; Universidade Federal do Rio Grande do Sul-Porto Alegre; RS Brazil
- Programa de Pós-Graduação em Neurociências, Instituto de Ciências Básicas Da Saúde; Universidade Federal do Rio Grande do Sul-Porto Alegre; RS Brazil
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Pardilla-Delgado E, Alger SE, Cunningham TJ, Kinealy B, Payne JD. Effects of post-encoding stress on performance in the DRM false memory paradigm. ACTA ACUST UNITED AC 2015; 23:46-50. [PMID: 26670187 PMCID: PMC4749840 DOI: 10.1101/lm.039354.115] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 10/28/2015] [Indexed: 11/28/2022]
Abstract
Numerous studies have investigated how stress impacts veridical memory, but how stress influences false memory formation remains poorly understood. In order to target memory consolidation specifically, a psychosocial stress (TSST) or control manipulation was administered following encoding of 15 neutral, semantically related word lists (DRM false memory task) and memory was tested 24 h later. Stress decreased recognition of studied words, while increasing false recognition of semantically related lure words. Moreover, while control subjects remembered true and false words equivalently, stressed subjects remembered more false than true words. These results suggest that stress supports gist memory formation in the DRM task, perhaps by hindering detail-specific processing in the hippocampus.
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Affiliation(s)
| | - Sara E Alger
- Department of Psychology, University of Notre Dame, Indiana 46556, USA
| | - Tony J Cunningham
- Department of Psychology, University of Notre Dame, Indiana 46556, USA
| | - Brian Kinealy
- Department of Psychology, University of Notre Dame, Indiana 46556, USA
| | - Jessica D Payne
- Department of Psychology, University of Notre Dame, Indiana 46556, USA
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