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Arellano Perez AD, Kautzmann AS, de Oliveira Alvares L. Social interaction-induced fear memory reduction: exploring the influence of dopamine and oxytocin receptors on memory updating. Transl Psychiatry 2024; 14:242. [PMID: 38844463 PMCID: PMC11156639 DOI: 10.1038/s41398-024-02955-3] [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: 12/08/2023] [Revised: 05/17/2024] [Accepted: 05/21/2024] [Indexed: 06/09/2024] Open
Abstract
It has been well established that a consolidated memory can be updated during the plastic state induced by reactivation. This updating process opens the possibility to modify maladaptive memory. In the present study, we evaluated whether fear memory could be updated to less-aversive level by incorporating hedonic information during reactivation. Thus, male rats were fear conditioned and, during retrieval, a female was presented as a social rewarding stimulus. We found that memory reactivation with a female (but not a male) reduces fear expression within-session and in the test, without presenting reinstatement or spontaneous recovery. Interestingly, this intervention impaired extinction. Finally, we demonstrated that this emotional remodeling to eliminate fear expression requires the activation of dopamine and oxytocin receptors during retrieval. Hence, these results shed new lights on the memory updating process and suggests that the exposure to natural rewarding information such as a female during retrieval reduces a previously consolidated fear memory.
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Affiliation(s)
- Angel David Arellano Perez
- Departamento de Biofísica, Laboratório de Neurobiologia da Memória, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
- Programa da Pós-Graduação em Neurociências. Instituto de Ciências Básicas da Saúde (ICBS). Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Aline Sartori Kautzmann
- Departamento de Biofísica, Laboratório de Neurobiologia da Memória, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Lucas de Oliveira Alvares
- Departamento de Biofísica, Laboratório de Neurobiologia da Memória, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.
- Programa da Pós-Graduação em Neurociências. Instituto de Ciências Básicas da Saúde (ICBS). Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.
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Merlo SA, Belluscio MA, Pedreira ME, Merlo E. Memory persistence: from fundamental mechanisms to translational opportunities. Transl Psychiatry 2024; 14:98. [PMID: 38355584 PMCID: PMC10867010 DOI: 10.1038/s41398-024-02808-z] [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: 07/24/2023] [Revised: 01/05/2024] [Accepted: 01/25/2024] [Indexed: 02/16/2024] Open
Abstract
Memory persistence is a double edge sword. Persistence of adaptive memories is essential for survival and even determines who we are. Neurodegenerative conditions with significant memory loss such as Alzheimer's disease, testify how defects of memory persistence have severe and irreversible effects on personality, among other symptoms. Yet, maintenance of overly strong maladaptive memories underlies highly debilitating psychiatric conditions including post-traumatic stress disorder, specific phobia, substance dependence and binge eating disorder. Here we review the neurobiological mechanisms supporting memory formation, persistence, inhibition and forgetting. We then shift the focus to how such mechanisms have been exploited to alter the persistence of laboratory-generated memories in human healthy volunteers as a proof of concept. Finally, we review the effect of behavioural and pharmacological interventions in anxiety and addiction disorder patients, highlighting key findings, gaps, and future directions for basic and translational research.
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Affiliation(s)
- Santiago Abel Merlo
- Instituto de Fisiología, Biología Molecular y Neurociencias, Consejo Nacional de Investigaciones Científicas y Técnicas and Universidad de Buenos Aires, Buenos Aires, Argentina
- Instituto de Fisiología y Biofísica Bernardo Houssay, Consejo Nacional de Investigaciones Científicas y Técnicas and Universidad de Buenos Aires, Buenos Aires, Argentina
- Laboratorio Bases Neuronales del Comportamiento, Departamento de Ciencias Fisiológicas, Facultad de Ciencias Médicas, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Mariano Andrés Belluscio
- Instituto de Fisiología y Biofísica Bernardo Houssay, Consejo Nacional de Investigaciones Científicas y Técnicas and Universidad de Buenos Aires, Buenos Aires, Argentina
- Laboratorio Bases Neuronales del Comportamiento, Departamento de Ciencias Fisiológicas, Facultad de Ciencias Médicas, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Maria Eugenia Pedreira
- Instituto de Fisiología, Biología Molecular y Neurociencias, Consejo Nacional de Investigaciones Científicas y Técnicas and Universidad de Buenos Aires, Buenos Aires, Argentina
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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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Correa-Netto NF, Masukawa MY, Silva-Gomes AM, Linardi A, Santos-Junior JG. Memory reactivation mediates emotional valence updating of contextual memory in mice with protracted morphine withdrawal. Behav Brain Res 2023; 438:114212. [PMID: 36370948 DOI: 10.1016/j.bbr.2022.114212] [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: 07/19/2022] [Revised: 10/29/2022] [Accepted: 11/07/2022] [Indexed: 11/11/2022]
Abstract
Mice subjected to morphine locomotor sensitization develop increased anxiety-behavior expression during protracted morphine withdrawal. This behavioral change is dependent on reexposure to the context of locomotor sensitization and reflects a state of conditioned anxiety. In this study, the effect of memory reconsolidation on the expression of conditioned anxiety in mice with protracted morphine withdrawal was examined. Five experimental protocols involving male C57BL/6 mice were used in which the animals were subjected to locomotor sensitization induced by morphine and reexposed to the context associated with the drug effect 28 days after locomotor sensitization and immediately after subjected to elevated plus maze. In experiment 1, mice were subjected or not to memory reactivation session and was observed that memory reactivation 27 days after sensitization reduced conditioned anxiety. In experiment 2, mice were subjected to memory reactivation, 24 h, 6 h or 1 h before contextual reexposure, and the effect of memory reactivation coincided with the temporal requirement for reconsolidation. In experiment 3, which involved exposure to a situation of acute stress immediately before memory reactivation, the mice demonstrated a return to increased conditioned anxiety. To confirm the influence of reconsolidation, in experiments 4 and 5, mice subjected to memory reactivation were treated with Nimodipine, diazepam or cyclohexamine, substances commonly used as pharmacological controls in reconsolidation experiments. Treatment with each substance separately inhibited the effect of reactivation in experiment 5 (presence of acute stressor) but not in experiment 4 (absence of acute stressor). These results suggest that, in our experimental model, reconsolidation is mediated through updating of the emotional valence of contextual memory associated with the administration of morphine.
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Affiliation(s)
- Nelson Francisco Correa-Netto
- Department of Physiological Sciences, Santa Casa of São Paulo Medical School, Rua Cesário Mota Junior, 61, Vila Buarque, São Paulo 01221-020, SP, Brazil.
| | - Márcia Yuriko Masukawa
- Department of Physiological Sciences, Santa Casa of São Paulo Medical School, Rua Cesário Mota Junior, 61, Vila Buarque, São Paulo 01221-020, SP, Brazil
| | - Alessandro Marcos Silva-Gomes
- Department of Physiological Sciences, Santa Casa of São Paulo Medical School, Rua Cesário Mota Junior, 61, Vila Buarque, São Paulo 01221-020, SP, Brazil
| | - Alessandra Linardi
- Department of Physiological Sciences, Santa Casa of São Paulo Medical School, Rua Cesário Mota Junior, 61, Vila Buarque, São Paulo 01221-020, SP, Brazil
| | - Jair Guilherme Santos-Junior
- Department of Physiological Sciences, Santa Casa of São Paulo Medical School, Rua Cesário Mota Junior, 61, Vila Buarque, São Paulo 01221-020, SP, Brazil
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Arellano Perez AD, Alves J, de Oliveira Alvares L. Re-exposures in the Dark Cycle Promote Attenuation of Fear Memory: Role of the Circadian Cycle and Glucocorticoids. Neuroscience 2022; 505:1-9. [DOI: 10.1016/j.neuroscience.2022.10.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 09/27/2022] [Accepted: 10/04/2022] [Indexed: 11/17/2022]
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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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Lages YV, Maisonnette SS, Rosseti FP, Galvão BO, Landeira-Fernandez J. Haloperidol and methylphenidate alter motor behavior and responses to conditioned fear of Carioca Low-conditioned Freezing rats. Pharmacol Biochem Behav 2021; 211:173296. [PMID: 34752797 DOI: 10.1016/j.pbb.2021.173296] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 11/02/2021] [Accepted: 11/03/2021] [Indexed: 11/29/2022]
Abstract
Animal models are important tools for studying neuropsychological disorders. Considering their limitations, a more extensive translational research must encompass data that are generated from several models. Therefore, a comprehensive characterization of these models is needed in terms of behavior and neurophysiology. The present study evaluated the behavioral responses of Carioca Low-conditioned Freezing (CLF) rats to haloperidol and methylphenidate. The CLF breeding line is characterized by low freezing defensive responses to contextual cues that are associated with aversive stimuli. CLF rats exhibited a delayed response to haloperidol at lower doses, needing higher doses to reach similar levels of catatonia as control randomly bred animals. Methylphenidate increased freezing responses to conditioned fear and induced motor effects in the open field. Thus, CLF rats differ from controls in their responses to both haloperidol and methylphenidate. Because of the dopamine-related molecular targets of these drugs, we hypothesize that dopaminergic alterations related to those of animal models of hyperactivity and attention disorders might underlie the observed phenotypes of the CLF line of rats.
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Affiliation(s)
- Yury V Lages
- Department of Psychology, Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Silvia S Maisonnette
- Department of Psychology, Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Flávia P Rosseti
- Department of Psychology, Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Bruno O Galvão
- Department of Psychology, Santa Úrsula University, Rio de Janeiro, Brazil
| | - J Landeira-Fernandez
- Department of Psychology, Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro, Brazil.
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Varga TG, de Toledo Simões JG, Siena A, Henrique E, da Silva RCB, Dos Santos Bioni V, Ramos AC, Rosenstock TR. Haloperidol rescues the schizophrenia-like phenotype in adulthood after rotenone administration in neonatal rats. Psychopharmacology (Berl) 2021; 238:2569-2585. [PMID: 34089344 DOI: 10.1007/s00213-021-05880-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 05/20/2021] [Indexed: 10/21/2022]
Abstract
Neuropsychiatric disorders are multifactorial disturbances that encompass several hypotheses, including changes in neurodevelopment. It is known that brain development disturbances during early life can predict psychosis in adulthood. As we have previously demonstrated, rotenone, a mitochondrial complex I inhibitor, could induce psychiatric-like behavior in 60-day-old rats after intraperitoneal injections from the 5th to the 11th postnatal day. Because mitochondrial deregulation is related to psychiatric disorders and the establishment of animal models is a high-value preclinical tool, we investigated the responsiveness of the rotenone (Rot)-treated newborn rats to pharmacological agents used in clinical practice, haloperidol (Hal), and methylphenidate (MPD). Taken together, our data show that Rot-treated animals exhibit hyperlocomotion, decreased social interaction, and diminished contextual fear conditioning response at P60, consistent with positive, negative, and cognitive deficits of schizophrenia (SZ), respectively, that were reverted by Hal, but not MPD. Rot-treated rodents also display a prodromal-related phenotype at P35. Overall, our results seem to present a new SZ animal model as a consequence of mitochondrial inhibition during a critical neurodevelopmental period. Therefore, our study is crucial not only to elucidate the relevance of mitochondrial function in the etiology of SZ but also to fulfill the need for new and trustworthy experimentation models and, likewise, provide possibilities to new therapeutic avenues for this burdensome disorder.
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Affiliation(s)
- Thiago Garcia Varga
- Department of Physiological Science, Santa Casa de São Paulo School of Medical Science, São Paulo, Brazil
| | | | - Amanda Siena
- Department of Pharmacology, Institute of Biomedical Science, University of São Paulo, Av. Prof. Lineu Prestes, 1524 - Ed. Biomédicas I, 2º andar, São Paulo, SP, 05508-900, Brazil
| | - Elisandra Henrique
- Department of Physiological Science, Santa Casa de São Paulo School of Medical Science, São Paulo, Brazil
| | | | | | - Aline Camargo Ramos
- Department of Psychiatry, Federal University of São Paulo, São Paulo, Brazil
| | - Tatiana Rosado Rosenstock
- Department of Pharmacology, Institute of Biomedical Science, University of São Paulo, Av. Prof. Lineu Prestes, 1524 - Ed. Biomédicas I, 2º andar, São Paulo, SP, 05508-900, Brazil. .,Institute of Cancer and Genomic Sciences, Institute of Biomedical Research, College of Medical and Dental Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK.
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Understanding the dynamic and destiny of memories. Neurosci Biobehav Rev 2021; 125:592-607. [PMID: 33722616 DOI: 10.1016/j.neubiorev.2021.03.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 01/18/2021] [Accepted: 03/08/2021] [Indexed: 01/16/2023]
Abstract
Memory formation enables the retention of life experiences overtime. Based on previously acquired information, organisms can anticipate future events and adjust their behaviors to maximize survival. However, in an ever-changing environment, a memory needs to be malleable to maintain its relevance. In fact, substantial evidence suggests that a consolidated memory can become labile and susceptible to modifications after being reactivated, a process termed reconsolidation. When an extinction process takes place, a memory can also be temporarily inhibited by a second memory that carries information with opposite meaning. In addition, a memory can fade and lose its significance in a process known as forgetting. Thus, following retrieval, new life experiences can be integrated with the original memory trace to maintain its predictive value. In this review, we explore the determining factors that regulate the fate of a memory after its reactivation. We focus on three post-retrieval memory destinies (reconsolidation, extinction, and forgetting) and discuss recent rodent studies investigating the biological functions and neural mechanisms underlying each of these processes.
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