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Martínez-Degollado M, Medina AC, Bello-Medina PC, Quirarte GL, Prado-Alcalá RA. Intense training prevents the amnestic effect of inactivation of dorsomedial striatum and induces high resistance to extinction. PLoS One 2024; 19:e0305066. [PMID: 38843228 PMCID: PMC11156383 DOI: 10.1371/journal.pone.0305066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Accepted: 05/22/2024] [Indexed: 06/09/2024] Open
Abstract
A large body of evidence has shown that treatments that interfere with memory consolidation become ineffective when animals are subjected to an intense learning experience; this effect has been observed after systemic and local administration of amnestic drugs into several brain areas, including the striatum. However, the effects of amnestic treatments on the process of extinction after intense training have not been studied. Previous research demonstrated increased spinogenesis in the dorsomedial striatum, but not in the dorsolateral striatum after intense training, indicating that the dorsomedial striatum is involved in the protective effect of intense training. To investigate this issue, male Wistar rats, previously trained with low, moderate, or high levels of foot shock, were used to study the effect of tetrodotoxin inactivation of dorsomedial striatum on memory consolidation and subsequent extinction of inhibitory avoidance. Performance of the task was evaluated during seven extinction sessions. Tetrodotoxin produced a marked deficit of memory consolidation of inhibitory avoidance trained with low and moderate intensities of foot shock, but normal consolidation occurred when a relatively high foot shock was used. The protective effect of intense training was long-lasting, as evidenced by the high resistance to extinction exhibited throughout the extinction sessions. We discuss the possibility that increased dendritic spinogenesis in dorsomedial striatum may underly this protective effect, and how this mechanism may be related to the resilient memory typical of post-traumatic stress disorder (PTSD).
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Affiliation(s)
- Martha Martínez-Degollado
- Departamento de Neurobiología Conductual y Cognitiva, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Querétaro, México
| | - Andrea C. Medina
- Departamento de Neurobiología Conductual y Cognitiva, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Querétaro, México
| | - Paola C. Bello-Medina
- Departamento de Neurobiología Conductual y Cognitiva, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Querétaro, México
| | - Gina L. Quirarte
- Departamento de Neurobiología Conductual y Cognitiva, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Querétaro, México
| | - Roberto A. Prado-Alcalá
- Departamento de Neurobiología Conductual y Cognitiva, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Querétaro, México
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2
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Menchén-Márquez S, Banqueri M, Gómez-Chacón B, Arias JL, Gallo M. Increased basolateral amygdala metabolic activity during flavor familiarization: an experimental study. BEHAVIORAL AND BRAIN FUNCTIONS : BBF 2023; 19:2. [PMID: 36737767 PMCID: PMC9896748 DOI: 10.1186/s12993-023-00206-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 01/22/2023] [Indexed: 02/05/2023]
Abstract
BACKGROUND Novel flavors elicit a cautious neophobic response which is attenuated as the flavor becomes familiar and safe. The attenuation of neophobia reveals the formation of a safe memory. Previous lesion studies in rats have reported that basolateral amygdala integrity is required for taste neophobia, but not neophobia to flavor, i.e., taste linked to an odorous component. Accordingly, immunohistochemical analyses show that novel tastes induced higher basolateral amygdala activity when compared to familiar ones. However, a different role of basolateral amygdala in flavor attenuation of neophobia is suggested by lesion studies using a vinegar solution. Studies assessing basolateral amygdala activity during flavor attenuation of neophobia are lacking. Thus, we quantified cytochrome oxidase as an index of basolateral amygdala activity along the first and second vinegar exposures in order to assess flavor neophobia and attenuation of neophobia. METHODS We exposed adult male Wistar rats either once or twice to a 3% cider vinegar solution or water, and compared the basolateral amygdala, piriform cortex and caudate putamen brain metabolic activity using cytochrome c-oxidase histochemistry. RESULTS We found increased flavor intake and cytochrome c-oxidase histochemistry activity during the second exposure in basolateral amygdala, but not in the piriform cortex and caudate/putamen. CONCLUSIONS The main finding of the study is that BLA metabolic activity was higher in the group exposed to a familiar vinegar solution than in the groups exposed to either water or a novel vinegar solution.
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Affiliation(s)
- Sergio Menchén-Márquez
- grid.4489.10000000121678994Department of Psychobiology, Institute of Neurosciences, Center for Biomedical Research (CIBM), University of Granada, Parque Tecnológico de la Salud (PTS), Avda del Conocimiento, s/n, Armilla, 18016 Granada, Spain
| | - María Banqueri
- grid.10863.3c0000 0001 2164 6351Laboratory of Neuroscience, Department of Psychology, University of Oviedo, Oviedo, Spain ,grid.4305.20000 0004 1936 7988Centre for Discovery Brain Sciences, Edinburgh University, Edinburgh, UK ,grid.10863.3c0000 0001 2164 6351Instituto de Neurociencias del Principado de Asturias (INEUROPA), University of Oviedo, Oviedo, Spain
| | - Beatriz Gómez-Chacón
- grid.7759.c0000000103580096Department of Didactics, Area of Didactics of Experimental Sciences, Faculty of Education Sciences, University of Cádiz, Cádiz, Spain
| | - Jorge L. Arias
- grid.10863.3c0000 0001 2164 6351Laboratory of Neuroscience, Department of Psychology, University of Oviedo, Oviedo, Spain ,grid.10863.3c0000 0001 2164 6351Instituto de Neurociencias del Principado de Asturias (INEUROPA), University of Oviedo, Oviedo, Spain
| | - Milagros Gallo
- grid.4489.10000000121678994Department of Psychobiology, Institute of Neurosciences, Center for Biomedical Research (CIBM), University of Granada, Parque Tecnológico de la Salud (PTS), Avda del Conocimiento, s/n, Armilla, 18016 Granada, Spain ,grid.507088.2Instituto de Investigación Biosanitaria (IBS), Granada, Spain
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Méndez-Couz M, González-Pardo H, Arias JL, Conejo NM. Hippocampal neuropeptide Y 2 receptor blockade improves spatial memory retrieval and modulates limbic brain metabolism. Neurobiol Learn Mem 2021; 187:107561. [PMID: 34838984 DOI: 10.1016/j.nlm.2021.107561] [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: 05/03/2021] [Revised: 11/17/2021] [Accepted: 11/19/2021] [Indexed: 10/19/2022]
Abstract
INTRODUCTION The neuropeptide Y (NPY) is broadly distributed in the central nervous system (CNS), and it has been related to neuroprotective functions. NPY seems to be an important component to counteract brain damage and cognitive impairment mediated by drugs of abuse and neurodegenerative diseases, and both NPY and its Y2 receptor (Y2R) are highly expressed in the hippocampus, critical for learning and memory. We have recently demonstrated its influence on cognitive functions; however, the specific mechanism and involved brain regions where NPY modulates spatial memory by acting on Y2R remain unclear. METHODS Here, we examined the involvement of the hippocampal NPY Y2R in spatial memory and associated changes in brain metabolism by bilateral administration of the selective antagonist BIIE0246 into the rat dorsal hippocampus. To further evaluate the relationship between memory functions and neuronal activity, we analysed the regional expression of the mitochondrial enzyme cytochrome c oxidase (CCO) as an index of oxidative metabolic capacity in limbic and non-limbic brain regions. RESULTS The acute blockade of NPY Y2R significantly improved spatial memory recall in rats trained in the Morris water maze that matched metabolic activity changes in spatial memory processing regions. Specifically, CCO activity changes were found in the dentate gyrus of the dorsal hippocampus and CA1 subfield of the ventral hippocampus, the infralimbic region of the PFC and the mammillary bodies. CONCLUSIONS These findings suggest that the NPY hippocampal system, through its Y2R receptor, influences spatial memory recall (retrieval) and exerts control over patterns of brain activation that are relevant for associative learning, probably mediated by Y2R modulation of long-term potentiation and long-term depression.
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Affiliation(s)
- Marta Méndez-Couz
- Laboratory of Neuroscience, Department of Psychology, Instituto de Neurociencias del Principado de Asturias (INEUROPA), University of Oviedo, Pl. Feijoo s/n, 33003 Oviedo, Spain; Dept. Neurophysiology. Medical Faculty, Ruhr-University Bochum. Universitätsstraße, 150. Building MA 01/551, 44780 Bochum, Germany.
| | - Héctor González-Pardo
- Laboratory of Neuroscience, Department of Psychology, Instituto de Neurociencias del Principado de Asturias (INEUROPA), University of Oviedo, Pl. Feijoo s/n, 33003 Oviedo, Spain; Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33006 Oviedo, Spain
| | - Jorge L Arias
- Laboratory of Neuroscience, Department of Psychology, Instituto de Neurociencias del Principado de Asturias (INEUROPA), University of Oviedo, Pl. Feijoo s/n, 33003 Oviedo, Spain; Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33006 Oviedo, Spain
| | - Nélida M Conejo
- Laboratory of Neuroscience, Department of Psychology, Instituto de Neurociencias del Principado de Asturias (INEUROPA), University of Oviedo, Pl. Feijoo s/n, 33003 Oviedo, Spain; Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33006 Oviedo, Spain
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4
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Méndez-Couz M, Krenzek B, Manahan-Vaughan D. Genetic Depletion of BDNF Impairs Extinction Learning of a Spatial Appetitive Task in the Presence or Absence of the Acquisition Context. Front Behav Neurosci 2021; 15:658686. [PMID: 33994970 PMCID: PMC8119774 DOI: 10.3389/fnbeh.2021.658686] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 03/26/2021] [Indexed: 12/12/2022] Open
Abstract
Brain derived neurotropic factor (BDNF) supports neuronal survival, growth, and differentiation and is involved in forms of hippocampus-dependent and independent learning, as well as hippocampus-dependent learning. Extinction learning comprises active inhibition of no-longer relevant learned information, in conjunction with a decreased response of a previously learned behavior. It is highly dependent on context, and evidence exists that it requires hippocampal activation. The participation of BDNF in memory processing is experience-dependent. For example, BDNF has been associated with synaptic plasticity needed for spatial learning, and it is involved in acquisition and extinction learning of fear conditioning. However, little is known about its role in spatial appetitive extinction learning. In this study, we evaluated to what extent BDNF contributes to spatial appetitive extinction learning in the presence (ABA) or absence (AAA) of exposure to the acquisition context. Daily training, of BDNF+/--mice or their wildtype (WT) littermates, to reach acquisition criterion in a T-maze, resulted in a similar performance outcome. However, extinction learning was delayed in the AAA, and impaired in the ABA-paradigm compared to performance in WT littermates. Trial-by-trial learning analysis indicated differences in the integration of the context into extinction learning by BDNF+/--mice compared to WT littermates. Taken together, these results support an important role for BDNF in processes that relate to information updating and retrieval that in turn are crucial for effective extinction learning.
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Affiliation(s)
- Marta Méndez-Couz
- Department of Neurophysiology, Medical Faculty, Ruhr University Bochum, Bochum, Germany
| | - Beate Krenzek
- Department of Neurophysiology, Medical Faculty, Ruhr University Bochum, Bochum, Germany
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Zorzo C, Arias JL, Méndez M. Retrieval of allocentric spatial memories is preserved up to thirty days and does not require higher brain metabolic demands. Neurobiol Learn Mem 2020; 175:107312. [DOI: 10.1016/j.nlm.2020.107312] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 07/17/2020] [Accepted: 08/30/2020] [Indexed: 01/13/2023]
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Méndez-Couz M, Manahan-Vaughan D, Silva AP, González-Pardo H, Arias JL, Conejo NM. Metaplastic contribution of neuropeptide Y receptors to spatial memory acquisition. Behav Brain Res 2020; 396:112864. [PMID: 32827566 DOI: 10.1016/j.bbr.2020.112864] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Revised: 08/11/2020] [Accepted: 08/12/2020] [Indexed: 12/21/2022]
Abstract
Neuropeptide Y (NPY) is highly abundant in the brain and is released as a co-transmitter with plasticity-related neurotransmitters such as glutamate, GABA and noradrenaline. Functionally, its release is associated with appetite, anxiety, and stress regulation. NPY acting on Y2 receptors (Y2R), facilitates fear extinction, suggesting a role in associative memory. Here, we explored to what extent NPY action at Y2R contributes to hippocampus-dependent spatial memory and found that dorsal intrahippocampal receptor antagonism improved spatial reference memory acquired in a water maze in rats, without affecting anxiety levels, or spontaneous motor activity. Water maze training resulted in an increase of Y2R, but not Y1R expression in the hippocampus. By contrast, in the prefrontal cortex there was a decrease in Y2R, and an increase of Y1R expression. Our results indicate that neuropeptide Y2R are significantly involved in hippocampus-dependent spatial memory and that receptor expression is dynamically regulated by this learning experience. Effects are consistent with a metaplastic contribution of NPY receptors to cumulative spatial learning.
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Affiliation(s)
- Marta Méndez-Couz
- Laboratory of Neuroscience, Department of Psychology, Instituto de Neurociencias del Principado de Asturias (INEUROPA), University of Oviedo, Spain; Ruhr University Bochum, Medical Faculty, Dept. Neurophysiology, Bochum, Germany.
| | | | - Ana Paula Silva
- Laboratory of Pharmacology and Experimental Therapeutics, Faculty of Medicine, University of Coimbra, Portugal; Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine and Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, Portugal
| | - Héctor González-Pardo
- Laboratory of Neuroscience, Department of Psychology, Instituto de Neurociencias del Principado de Asturias (INEUROPA), University of Oviedo, Spain
| | - Jorge Luis Arias
- Laboratory of Neuroscience, Department of Psychology, Instituto de Neurociencias del Principado de Asturias (INEUROPA), University of Oviedo, Spain
| | - Nélida María Conejo
- Laboratory of Neuroscience, Department of Psychology, Instituto de Neurociencias del Principado de Asturias (INEUROPA), University of Oviedo, Spain
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7
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González-Pardo H, Arias JL, Vallejo G, Conejo NM. Environmental enrichment effects after early stress on behavior and functional brain networks in adult rats. PLoS One 2019; 14:e0226377. [PMID: 31830106 PMCID: PMC6907785 DOI: 10.1371/journal.pone.0226377] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Accepted: 11/25/2019] [Indexed: 01/17/2023] Open
Abstract
Early life stress is associated with long-term and pervasive adverse effects on neuroendocrine development, affecting normal cognitive and emotional development. Experimental manipulations like environmental enrichment (EE) may potentially reverse the effects of early life stress induced by maternal separation (MS) paradigm in rodents. However, the functional brain networks involved in the effects of EE after prolonged exposure to MS have not yet been investigated. In order to evaluate possible changes in brain functional connectivity induced by EE after MS, quantitative cytochrome c oxidase (CCO) histochemistry was applied to determine regional brain oxidative metabolism in adult male rats. Unexpectedly, results show that prolonged MS during the entire weaning period did not cause any detrimental effects on spatial learning and memory, including depressive-like behavior evaluated in the forced-swim test, and decreased anxiety-like behavior. However, EE seemed to alter anxiety- and depression-like behaviors in both control and MS groups, but improved spatial memory in the latter groups. Analysis of brain CCO activity showed significantly lower metabolic capacity in most brain regions selected in EE groups probably associated with chronic stress, but no effects of MS on brain metabolic capacity. In addition, principal component analysis of CCO activity revealed increased large-scale functional brain connectivity comprising at least three main networks affected by EE in both MS and control groups. Moreover, EE induced a pattern of functional brain connectivity associated with stress and anxiety-like behavior as compared with non-enriched groups. In conclusion, EE had differential effects on cognition and emotional behavior irrespective of exposure to MS. In view of the remarkable effects of EE on brain function and behavior, implementation of rodent housing conditions should be optimized by evaluating the balance between scientific validity and animal welfare.
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Affiliation(s)
- Héctor González-Pardo
- Laboratory of Neuroscience, Department of Psychology and Institute of Neuroscience of the Principality of Asturias (INEUROPA), University of Oviedo, Oviedo, Spain
| | - Jorge L. Arias
- Laboratory of Neuroscience, Department of Psychology and Institute of Neuroscience of the Principality of Asturias (INEUROPA), University of Oviedo, Oviedo, Spain
| | - Guillermo Vallejo
- Methodology Area, Department of Psychology and Institute of Neuroscience of the Principality of Asturias (INEUROPA), University of Oviedo, Oviedo, Spain
| | - Nélida M. Conejo
- Laboratory of Neuroscience, Department of Psychology and Institute of Neuroscience of the Principality of Asturias (INEUROPA), University of Oviedo, Oviedo, Spain
- * E-mail:
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8
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Méndez-Couz M, Becker JM, Manahan-Vaughan D. Functional Compartmentalization of the Contribution of Hippocampal Subfields to Context-Dependent Extinction Learning. Front Behav Neurosci 2019; 13:256. [PMID: 31798429 PMCID: PMC6868086 DOI: 10.3389/fnbeh.2019.00256] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 10/28/2019] [Indexed: 12/15/2022] Open
Abstract
During extinction learning (EL), an individual learns that a previously learned behavior no longer fulfills its original purpose, or is no longer relevant. Recent studies have contradicted earlier theories that EL comprises forgetting, or the inhibition of the previously learned behavior, and indicate that EL comprises new associative learning. This suggests that the hippocampus is involved in this process. Empirical evidence is lacking however. Here, we used fluorescence in situ hybridization of somatic immediate early gene (IEG) expression to scrutinize if the hippocampus processes EL. Rodents engaged in context-dependent EL and were also tested for renewal of (the original behavioral response to) a spatial appetitive task in a T-maze. Whereas distal and proximal CA1 subfields processed both EL and renewal, effects in the proximal CA1 were more robust consistent with a role of this subfield in processing context. The lower blade of the dentate gyrus (DG) and the proximal CA3 subfields were particularly involved in renewal. Responses in the distal and proximal CA3 subfields suggest that this hippocampal subregion may also contribute to the evaluation of the reward outcome. Taken together, our findings provide novel and direct evidence for the involvement of distinct hippocampal subfields in context-dependent EL and renewal.
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Affiliation(s)
- Marta Méndez-Couz
- Department of Neurophysiology, Medical Faculty, Ruhr University Bochum, Bochum, Germany
| | - Jana M Becker
- Department of Neurophysiology, Medical Faculty, Ruhr University Bochum, Bochum, Germany
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9
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Wirt RA, Hyman JM. ACC Theta Improves Hippocampal Contextual Processing during Remote Recall. Cell Rep 2019; 27:2313-2327.e4. [DOI: 10.1016/j.celrep.2019.04.080] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 03/18/2019] [Accepted: 04/17/2019] [Indexed: 12/27/2022] Open
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10
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Age-Induced Spatial Memory Deficits in Rats Are Correlated with Specific Brain Region Alterations in Microglial Morphology and Gene Expression. J Neuroimmune Pharmacol 2018; 14:251-262. [DOI: 10.1007/s11481-018-9817-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Accepted: 10/12/2018] [Indexed: 10/28/2022]
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11
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Cantacorps L, González-Pardo H, Arias JL, Valverde O, Conejo NM. Altered brain functional connectivity and behaviour in a mouse model of maternal alcohol binge-drinking. Prog Neuropsychopharmacol Biol Psychiatry 2018. [PMID: 29526773 DOI: 10.1016/j.pnpbp.2018.03.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Prenatal and perinatal alcohol exposure caused by maternal alcohol intake during gestation and lactation periods can have long-lasting detrimental effects on the brain development and behaviour of offspring. Children diagnosed with Foetal Alcohol Spectrum Disorders (FASD) display a wide range of cognitive, emotional and motor deficits, together with characteristic morphological abnormalities. Maternal alcohol binge drinking is particularly harmful for foetal and early postnatal brain development, as it involves exposure to high levels of alcohol over short periods of time. However, little is known about the long-term effects of maternal alcohol binge drinking on brain function and behaviour. To address this issue, we used pregnant C57BL/6 female mice with time-limited access to a 20% v/v alcohol solution as a procedure to model alcohol binge drinking during gestation and lactational periods. Male offspring were behaviourally tested during adolescence (30 days) and adulthood (60 days), and baseline neural metabolic capacity of brain regions sensitive to alcohol effects were also evaluated in adult animals from both groups. Our results show that prenatal and postnatal alcohol exposure caused age-dependent changes in spontaneous locomotor activity, increased anxiety-like behaviour and attenuated alcohol-induced conditioned place preference in adults. Also, significant changes in neural metabolic capacity using cytochrome c oxidase (CCO) quantitative histochemistry were found in the hippocampal dentate gyrus, the mammillary bodies, the ventral tegmental area, the lateral habenula and the central lobules of the cerebellum in adult mice with prenatal and postnatal alcohol exposure. In addition, the analysis of interregional CCO activity correlations in alcohol-exposed adult mice showed disrupted functional brain connectivity involving the limbic, brainstem, and cerebellar regions. Finally, increased neurogenesis was found in the dentate gyrus of the hippocampus of alcohol-exposed offspring, suggesting neuroadaptive effects due to early alcohol exposure. Our results demonstrate that maternal binge-like alcohol drinking causes long-lasting effects on motor and emotional-related behaviours associated with impaired neuronal metabolic capacity and altered functional brain connectivity.
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Affiliation(s)
- Lídia Cantacorps
- Neurobiology of Behaviour Research Group (GReNeC-NeuroBio), Department of Experimental and Health Sciences, Universitat Pompeu Fabra, Barcelona, Spain
| | - Héctor González-Pardo
- Laboratory of Neuroscience, Department of Psychology, University of Oviedo, Plaza Feijóo, Oviedo, Spain; Instituto de Neurociencias del Principado de Asturias (INEUROPA), Oviedo, Spain
| | - Jorge L Arias
- Laboratory of Neuroscience, Department of Psychology, University of Oviedo, Plaza Feijóo, Oviedo, Spain; Instituto de Neurociencias del Principado de Asturias (INEUROPA), Oviedo, Spain
| | - Olga Valverde
- Neurobiology of Behaviour Research Group (GReNeC-NeuroBio), Department of Experimental and Health Sciences, Universitat Pompeu Fabra, Barcelona, Spain; Neuroscience Research Program, IMIM-Hospital del Mar Research Institute, Barcelona, Spain.
| | - Nélida M Conejo
- Laboratory of Neuroscience, Department of Psychology, University of Oviedo, Plaza Feijóo, Oviedo, Spain; Instituto de Neurociencias del Principado de Asturias (INEUROPA), Oviedo, Spain
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12
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Specific disruption of contextual memory recall by sparse additional activity in the dentate gyrus. Neurobiol Learn Mem 2017; 145:190-198. [PMID: 29031808 DOI: 10.1016/j.nlm.2017.10.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 09/06/2017] [Accepted: 10/07/2017] [Indexed: 01/03/2023]
Abstract
The dentate gyrus (DG) of the hippocampus is essential for contextual and spatial memory processing. While lesion or silencing of the DG impairs contextual memory encoding and recall, overly activated DG also prevents proper memory retrieval. Abnormally elevated activity in the DG is repeatedly reported in amnesic mild cognitive impairment (aMCI) patients or aged adults. Although the correlation between memory failure and abnormally active hippocampus is clear, their causal relationship or the underlying nature of such interfering activity is not well understood. Using optogenetics aided by a carefully controlled adeno-associated virus infection system, we were able to examine the differential effects of abnormally activated hippocampus on mice motor behavior and memory function, depending on the extent of the stimulation. Optogenetic stimulation of massive proportion of dorsal DG cells resulted in memory retrieval impairment, but also induced increase in general locomotion. Random additional activity in a sparse population of dorsal DG neurons, however, interfered with contextual memory recall without inducing hyperactivity. Our findings thus establish the causal role of elevated DG activity on memory recall failure, suggesting such aberrant DG activity may contribute to amnesic symptoms in aMCI patients and aged adults.
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Pérez MÁ, Peñaloza-Sancho V, Ahumada J, Fuenzalida M, Dagnino-Subiabre A. n-3 Polyunsaturated fatty acid supplementation restored impaired memory and GABAergic synaptic efficacy in the hippocampus of stressed rats. Nutr Neurosci 2017; 21:556-569. [DOI: 10.1080/1028415x.2017.1323609] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Miguel Ángel Pérez
- Laboratory of Stress Neurobiology, Center for Neurobiology and Brain Plasticity, Faculty of Sciences, Institute of Physiology, Universidad de Valparaíso, Valparaíso, Chile
| | - Valentín Peñaloza-Sancho
- Laboratory of Stress Neurobiology, Center for Neurobiology and Brain Plasticity, Faculty of Sciences, Institute of Physiology, Universidad de Valparaíso, Valparaíso, Chile
| | - Juan Ahumada
- Laboratory of Neural Plasticity, Center for Neurobiology and Brain Plasticity, Faculty of Sciences, Institute of Physiology, Universidad de Valparaíso, Valparaíso, Chile
| | - Marco Fuenzalida
- Laboratory of Neural Plasticity, Center for Neurobiology and Brain Plasticity, Faculty of Sciences, Institute of Physiology, Universidad de Valparaíso, Valparaíso, Chile
| | - Alexies Dagnino-Subiabre
- Laboratory of Stress Neurobiology, Center for Neurobiology and Brain Plasticity, Faculty of Sciences, Institute of Physiology, Universidad de Valparaíso, Valparaíso, Chile
- Auditory and Cognition Center, AUCO, Santiago, Chile
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Gasalla P, Begega A, Soto A, Dwyer DM, López M. Functional brain networks underlying latent inhibition of conditioned disgust in rats. Behav Brain Res 2016; 315:36-44. [PMID: 27491591 DOI: 10.1016/j.bbr.2016.07.051] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Revised: 07/12/2016] [Accepted: 07/30/2016] [Indexed: 02/08/2023]
Abstract
The present experiment examined the neuronal networks involved in the latent inhibition of conditioned disgust by measuring brain oxidative metabolism. Rats were given nonreinforced intraoral (IO) exposure to saccharin (exposed groups) or water (non-exposed groups) followed by a conditioning trial in which the animals received an infusion of saccharin paired (or unpaired) with LiCl. On testing, taste reactivity responses displayed by the rats during the infusion of the saccharin were examined. Behavioral data showed that preexposure to saccharin attenuated the development of LiCl-induced conditioned disgust reactions, indicating that the effects of taste aversion on hedonic taste reactivity had been reduced. With respect to cumulative oxidative metabolic activity across the whole study period, the parabrachial nucleus was the only single region examined which showed differential activity between groups which received saccharin-LiCl pairings with and without prior non-reinforced saccharin exposure, suggesting a key role in the effects of latent inhibition of taste aversion learning. In addition, many functional connections between brain regions were revealed through correlational analysis of metabolic activity, in particular an accumbens-amygdala interaction that may be involved in both positive and negative hedonic responses.
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Affiliation(s)
- Patricia Gasalla
- Department of Psychology, University of Oviedo, Oviedo, Spain; School of Psychology, Cardiff University, UK.
| | - Azucena Begega
- Department of Psychology, University of Oviedo, Oviedo, Spain
| | - Alberto Soto
- Department of Psychology, University of Oviedo, Oviedo, Spain
| | | | - Matías López
- Department of Psychology, University of Oviedo, Oviedo, Spain
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15
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Méndez-Couz M, González-Pardo H, Vallejo G, Arias JL, Conejo NM. Spatial memory extinction differentially affects dorsal and ventral hippocampal metabolic activity and associated functional brain networks. Hippocampus 2016; 26:1265-75. [DOI: 10.1002/hipo.22602] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Revised: 03/22/2016] [Accepted: 04/08/2016] [Indexed: 12/23/2022]
Affiliation(s)
- Marta Méndez-Couz
- Laboratory of Neuroscience; Department of Psychology; Instituto de Neurociencias del Principado de Asturias (INEUROPA), University of Oviedo; Plaza Feijoo Oviedo Spain
| | - Héctor González-Pardo
- Laboratory of Neuroscience; Department of Psychology; Instituto de Neurociencias del Principado de Asturias (INEUROPA), University of Oviedo; Plaza Feijoo Oviedo Spain
| | - Guillermo Vallejo
- Methodology Area; Department of Psychology; Instituto de Neurociencias del Principado de Asturias (INEUROPA), University of Oviedo; Plaza Feijoo Oviedo Spain
| | - Jorge L. Arias
- Laboratory of Neuroscience; Department of Psychology; Instituto de Neurociencias del Principado de Asturias (INEUROPA), University of Oviedo; Plaza Feijoo Oviedo Spain
| | - Nélida M. Conejo
- Laboratory of Neuroscience; Department of Psychology; Instituto de Neurociencias del Principado de Asturias (INEUROPA), University of Oviedo; Plaza Feijoo Oviedo Spain
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16
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Uceda S, Ocaña FM, Martín-Monzón I, Rodríguez-Expósito B, Durán E, Rodríguez F. Spatial learning-related changes in metabolic brain activity contribute to the delimitation of the hippocampal pallium in goldfish. Behav Brain Res 2015; 292:403-8. [PMID: 26142782 DOI: 10.1016/j.bbr.2015.06.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Revised: 05/29/2015] [Accepted: 06/08/2015] [Indexed: 01/17/2023]
Abstract
Comparative neuroanatomical, developmental and functional evidence suggests that the lateral division of the area dorsalis telencephali (Dl) of the teleost fish is homologous to the hippocampus of tetrapods. Nonetheless, some important aspects of the organization of the hippocampal pallium of teleosts are still under discussion and conflicting hypotheses regarding the extension and demarcation of this region have been proposed. Thus, whereas some authors suggest that the entire Dl region, including its dorsal (Dld) and ventral (Dlv) subdivisions, is homologue to the mammalian hippocampus, others claim that only Dlv should be considered as such. To further elucidate this debate, we investigated the role of Dld and Dlv in one of the most unambiguous functions of the hippocampus, spatial learning. We trained goldfish in a spatial constancy task and mapped the activity of Dld, Dlv, and the medial division of the area dorsalis telencephali (Dm) by means of cytochrome oxidase (CO) histochemistry. The results revealed that training goldfish in the spatial constancy task significantly increased the metabolic activity in Dlv, but not in Dld or Dm, suggesting that only Dlv is critically involved in spatial learning and in this regard comparable to the hippocampus. These data provide additional functional support to the hypotheses that consider Dl as a heterogeneous pallial region and propose that Dlv, but not Dld, might be homologous to the hippocampus.
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Affiliation(s)
- S Uceda
- Laboratory of Psychobiology, University of Sevilla, Campus Santiago Ramón y Cajal, 41018, Sevilla, Spain.
| | - F M Ocaña
- Laboratory of Psychobiology, University of Sevilla, Campus Santiago Ramón y Cajal, 41018, Sevilla, Spain
| | - I Martín-Monzón
- Laboratory of Psychobiology, University of Sevilla, Campus Santiago Ramón y Cajal, 41018, Sevilla, Spain
| | - B Rodríguez-Expósito
- Laboratory of Psychobiology, University of Sevilla, Campus Santiago Ramón y Cajal, 41018, Sevilla, Spain
| | - E Durán
- Laboratory of Psychobiology, University of Sevilla, Campus Santiago Ramón y Cajal, 41018, Sevilla, Spain
| | - F Rodríguez
- Laboratory of Psychobiology, University of Sevilla, Campus Santiago Ramón y Cajal, 41018, Sevilla, Spain
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17
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Méndez-Couz M, Conejo NM, Vallejo G, Arias JL. Brain functional network changes following Prelimbic area inactivation in a spatial memory extinction task. Behav Brain Res 2015; 287:247-55. [DOI: 10.1016/j.bbr.2015.03.033] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Revised: 03/11/2015] [Accepted: 03/16/2015] [Indexed: 02/07/2023]
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18
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Méndez-Couz M, Conejo NM, González-Pardo H, Arias JL. Functional interactions between dentate gyrus, striatum and anterior thalamic nuclei on spatial memory retrieval. Brain Res 2015; 1605:59-69. [PMID: 25680583 DOI: 10.1016/j.brainres.2015.02.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Revised: 02/02/2015] [Accepted: 02/03/2015] [Indexed: 11/29/2022]
Abstract
The standard model of memory system consolidation supports the temporal reorganization of brain circuits underlying long-term memory storage, including interactions between the dorsal hippocampus and extra-hippocampal structures. In addition, several brain regions have been suggested to be involved in the retrieval of spatial memory. In particular, several authors reported a possible role of the ventral portion of the hippocampus together with the thalamus or the striatum in the persistence of this type of memory. Accordingly, the present study aimed to evaluate the contribution of different cortical and subcortical brain regions, and neural networks involved in spatial memory retrieval. For this purpose, we used cytochrome c oxidase quantitative histochemistry as a reliable method to measure brain oxidative metabolism. Animals were trained in a hidden platform task and tested for memory retention immediately after the last training session; one week after completing the task, they were also tested in a memory retrieval probe. Results showed that retrieval of the previously learned task was associated with increased levels of oxidative metabolism in the prefrontal cortex, the dorsal and ventral striatum, the anterodorsal thalamic nucleus and the dentate gyrus of the dorsal and ventral hippocampus. The analysis of functional interactions between brain regions suggest that the dorsal and ventral dentate gyrus could be involved in spatial memory retrieval. In addition, the results highlight the key role of the extended hippocampal system, thalamus and striatum in this process. Our study agrees with previous ones reporting interactions between the dorsal hippocampus and the prefrontal cortex during spatial memory retrieval. Furthermore, novel activation patterns of brain networks involving the aforementioned regions were found. These functional brain networks could underlie spatial memory retrieval evaluated in the Morris water maze task.
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Affiliation(s)
- M Méndez-Couz
- Laboratory of Neuroscience, Department of Psychology. Instituto de Neurociencias del Principado de Asturias (INEUROPA), University of Oviedo, Plaza Feijóo s/n, 33003 Oviedo, Spain.
| | - N M Conejo
- Laboratory of Neuroscience, Department of Psychology. Instituto de Neurociencias del Principado de Asturias (INEUROPA), University of Oviedo, Plaza Feijóo s/n, 33003 Oviedo, Spain.
| | - H González-Pardo
- Laboratory of Neuroscience, Department of Psychology. Instituto de Neurociencias del Principado de Asturias (INEUROPA), University of Oviedo, Plaza Feijóo s/n, 33003 Oviedo, Spain.
| | - J L Arias
- Laboratory of Neuroscience, Department of Psychology. Instituto de Neurociencias del Principado de Asturias (INEUROPA), University of Oviedo, Plaza Feijóo s/n, 33003 Oviedo, Spain.
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19
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Cowansage KK, Shuman T, Dillingham BC, Chang A, Golshani P, Mayford M. Direct reactivation of a coherent neocortical memory of context. Neuron 2014; 84:432-41. [PMID: 25308330 DOI: 10.1016/j.neuron.2014.09.022] [Citation(s) in RCA: 240] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/03/2014] [Indexed: 10/24/2022]
Abstract
Declarative memories are thought to be stored within anatomically distributed neuronal networks requiring the hippocampus; however, it is unclear how neocortical areas participate in memory at the time of encoding. Here, we use a c-fos-based genetic tagging system to selectively express the channelrhodopsin variant, ChEF, and optogenetically reactivate a specific neural ensemble in retrosplenial cortex (RSC) engaged by context fear conditioning. Artificial stimulation of RSC was sufficient to produce both context-specific behavior and downstream cellular activity commensurate with natural experience. Moreover, optogenetically but not contextually elicited responses were insensitive to hippocampal inactivation, suggesting that although the hippocampus is needed to coordinate activation by sensory cues, a higher-order cortical framework can independently subserve learned behavior, even shortly after learning.
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Affiliation(s)
- Kiriana K Cowansage
- Department of Molecular and Cellular Neuroscience, Dorris Neuroscience Center, The Scripps Research Institute, 10550 North Torrey Pines Road, DNC 202, La Jolla, CA 92037, USA
| | - Tristan Shuman
- Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, 710 Westwood Plaza, Los Angeles, CA 90095, USA
| | - Blythe C Dillingham
- Department of Molecular and Cellular Neuroscience, Dorris Neuroscience Center, The Scripps Research Institute, 10550 North Torrey Pines Road, DNC 202, La Jolla, CA 92037, USA; The Kellogg School of Science and Technology
| | - Allene Chang
- Department of Molecular and Cellular Neuroscience, Dorris Neuroscience Center, The Scripps Research Institute, 10550 North Torrey Pines Road, DNC 202, La Jolla, CA 92037, USA
| | - Peyman Golshani
- Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, 710 Westwood Plaza, Los Angeles, CA 90095, USA; UCLA Integrative Center for Learning and Memory; West Los Angeles VA Medical Center, 11301 Wilshire Boulevard, Los Angeles, CA 90073, USA
| | - Mark Mayford
- Department of Molecular and Cellular Neuroscience, Dorris Neuroscience Center, The Scripps Research Institute, 10550 North Torrey Pines Road, DNC 202, La Jolla, CA 92037, USA.
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20
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Spatial memory extinction: a c-Fos protein mapping study. Behav Brain Res 2013; 260:101-10. [PMID: 24315832 DOI: 10.1016/j.bbr.2013.11.032] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Revised: 11/18/2013] [Accepted: 11/22/2013] [Indexed: 02/07/2023]
Abstract
While the neuronal basis of spatial memory consolidation has been thoroughly studied, the substrates mediating the process of extinction remain largely unknown. This study aimed to evaluate the functional contribution of selected brain regions during the extinction of a previously acquired spatial memory task in the Morris water maze. For that purpose, we used adult male Wistar rats trained in a spatial reference memory task. Learning-related changes in c-Fos inmunoreactive cells after training were evaluated in cortical and subcortical regions. Results show that removal of the hidden platform in the water maze induced extinction of the previously reinforced escape behavior after 16 trials, without spontaneous recovery 24h later. Extinction was related with significantly higher numbers of c-Fos positive nuclei in amygdala nuclei and prefrontal cortex. On the other hand, the lateral mammillary bodies showed higher number of c-Fos positive cells than the control group. Therefore, in contrast with the results obtained in studies of classical conditioning, we show the involvement of diencephalic structures mediating this kind of learning. In summary, our findings suggest that medial prefrontal cortex, the amygdala complex and diencephalic structures like the lateral mammillary nuclei are relevant for the extinction of spatial memory.
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