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Colita D, Burdusel D, Glavan D, Hermann DM, Colită CI, Colita E, Udristoiu I, Popa-Wagner A. Molecular mechanisms underlying major depressive disorder and post-stroke affective disorders. J Affect Disord 2024; 344:149-158. [PMID: 37827260 DOI: 10.1016/j.jad.2023.10.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 09/24/2023] [Accepted: 10/08/2023] [Indexed: 10/14/2023]
Abstract
Two of the most common and incapacitating mental health disorders around the world are major depressive disorder (MDD) and post-stroke depression (PSD). MDD is thought to result from abnormal connectivity between the monoaminergic, glutamatergic, GABAergic, and/or cholinergic pathways. Additional factors include the roles of hormonal, immune, ageing, as well as the influence of cellular, molecular, and epigenetics in the development of mood disorders. This complexity of factors has been anticipated by the Swiss psychiatrists Paul Kielholz and Jules Angst who introduced a multimodal treatment of MDD. Depression is the predominant mood disorder, impacting around one-third of individuals who have experienced a stroke. MDD and PSD share common underlying biological mechanisms related to the disruption of monoaminergic pathways. The major contributor to PSD is the stroke lesion location, which can involve the disruption of the serotoninergic, dopaminergic, glutamatergic, GABAergic, or cholinergic pathways. Additionally, various other disorders such as mania, bipolar disorder, anxiety disorder, and apathy might occur post-stroke, although their prevalence is considerably lower. However, there are differences in the onset of MDD among mood disorders. Some mood disorders develop gradually and can persist for a lifetime, potentially culminating in suicide. In contrast, PSD has a rapid onset because of the severe disruption of neural pathways essential for mood behavior caused by the lesion. However, PSD might also spontaneously resolve several months after a stroke, though it is associated with higher mortality. This review also provides a brief overview of the treatments currently available in medical practice.
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Affiliation(s)
- Daniela Colita
- Doctoral School, University of Medicine and Pharmacy Carol Davila, 050474 Bucharest, Romania
| | - Daiana Burdusel
- Department of Psychiatry, University of Medicine and Pharmacy, 200349 Craiova, Romania; Chair of Vascular Neurology, Dementia and Ageing, University Hospital Essen, University of Duisburg-Essen, 45147 Essen, Germany
| | - Daniela Glavan
- Department of Psychiatry, University of Medicine and Pharmacy, 200349 Craiova, Romania; Chair of Vascular Neurology, Dementia and Ageing, University Hospital Essen, University of Duisburg-Essen, 45147 Essen, Germany
| | - Dirk M Hermann
- Chair of Vascular Neurology, Dementia and Ageing, University Hospital Essen, University of Duisburg-Essen, 45147 Essen, Germany
| | - Cezar-Ivan Colită
- Doctoral School, University of Medicine and Pharmacy Carol Davila, 050474 Bucharest, Romania
| | - Eugen Colita
- Doctoral School, University of Medicine and Pharmacy Carol Davila, 050474 Bucharest, Romania
| | - Ion Udristoiu
- Department of Psychiatry, University of Medicine and Pharmacy, 200349 Craiova, Romania.
| | - Aurel Popa-Wagner
- Chair of Vascular Neurology, Dementia and Ageing, University Hospital Essen, University of Duisburg-Essen, 45147 Essen, Germany.
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2
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The lifetime impact of stress on fear regulation and cortical function. Neuropharmacology 2023; 224:109367. [PMID: 36464208 DOI: 10.1016/j.neuropharm.2022.109367] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 11/22/2022] [Accepted: 11/30/2022] [Indexed: 12/03/2022]
Abstract
A variety of stressful experiences can influence the ability to form and subsequently inhibit fear memory. While nonsocial stress can impact fear learning and memory throughout the lifespan, psychosocial stressors that involve negative social experiences or changes to the social environment have a disproportionately high impact during adolescence. Here, we review converging lines of evidence that suggest that development of prefrontal cortical circuitry necessary for both social experiences and fear learning is altered by stress exposure in a way that impacts both social and fear behaviors throughout the lifespan. Further, we suggest that psychosocial stress, through its impact on the prefrontal cortex, may be especially detrimental during early developmental periods characterized by higher sociability. This article is part of the Special Issue on 'Fear, Anxiety and PTSD'.
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3
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PET imaging of animal models with depressive-like phenotypes. Eur J Nucl Med Mol Imaging 2023; 50:1564-1584. [PMID: 36642759 PMCID: PMC10119194 DOI: 10.1007/s00259-022-06073-4] [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: 07/08/2022] [Accepted: 12/03/2022] [Indexed: 01/17/2023]
Abstract
Major depressive disorder is a growing and poorly understood pathology. Due to technical and ethical limitations, a significant proportion of the research on depressive disorders cannot be performed on patients, but needs to be investigated in animal paradigms. Over the years, animal studies have provided new insight in the mechanisms underlying depression. Several of these studies have used PET imaging for the non-invasive and longitudinal investigation of the brain physiology. This review summarises the findings of preclinical PET imaging in different experimental paradigms of depression and compares these findings with observations from human studies. Preclinical PET studies in animal models of depression can be divided into three main different approaches: (a) investigation of glucose metabolism as a biomarker for regional and network involvement, (b) evaluation of the availability of different neuroreceptor populations associated with depressive phenotypes, and (c) monitoring of the inflammatory response in phenotypes of depression. This review also assesses the relevance of the use of PET imaging techniques in animal paradigms for the understanding of specific aspects of the depressive-like phenotypes, in particular whether it might contribute to achieve a more detailed characterisation of the clinical depressive phenotypes for the development of new therapies for depression.
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4
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Huston JP, Chao OY. Probing the nature of episodic memory in rodents. Neurosci Biobehav Rev 2023; 144:104930. [PMID: 36544301 DOI: 10.1016/j.neubiorev.2022.104930] [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: 08/04/2022] [Revised: 10/21/2022] [Accepted: 10/24/2022] [Indexed: 12/15/2022]
Abstract
Episodic memory (EM) specifies the experience of retrieving information of an event at the place and time of occurrence. Whether non-human animals are capable of EM remains debated, whereas evidence suggests that they have a memory system akin to EM. We here trace the development of various behavioral paradigms designed to study EM in non-human animals, in particular the rat. We provide an in-depth description of the available behavioral tests which combine three spontaneous object exploration paradigms, namely novel object preference (for measuring memory for "what"), novel location preference (for measuring memory for "where") and temporal order memory (memory for "when"), into a single trial to gauge a memory akin to EM. Most important, we describe a variation of such a test in which each memory component interacts with the others, demonstrating an integration of diverse mnemonic information. We discuss why a behavioral model of EM must be able to assess the ability to integrate "what", "where" and "when" information into a single experience. We attempt an interpretation of the various tests and review the studies that have applied them in areas such as pharmacology, neuroanatomy, circuit analysis, and sleep. Finally, we anticipate future directions in the search for neural mechanisms of EM in the rat and outline model experiments and methodologies in this pursuit.
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Affiliation(s)
- Joseph P Huston
- Center for Behavioral Neuroscience, Institute of Experimental Psychology, University of Düsseldorf, 40225 Düsseldorf, Germany.
| | - Owen Y Chao
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth, MN 55812, USA
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5
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Blümel L, Brosda J, Bert B, Hamann M, Dietz GPH. Moderately aged OFA rats as a novel model for mild age-related alterations in learning and memory. Brain Cogn 2021; 154:105799. [PMID: 34543909 DOI: 10.1016/j.bandc.2021.105799] [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: 02/09/2021] [Revised: 08/29/2021] [Accepted: 09/02/2021] [Indexed: 11/27/2022]
Abstract
Aged rodents have been used as preclinical models of age-associated cognitive decline. Most of those models displayed substantial impairments in learning and memory. The initial, more subtle changes that precede more severe losses in cognitive abilities have not been well characterized. Here, we established a model detecting initial subtle cognitive changes by comparing the performance of moderately aged Oncins France Strain A Sprague Dawley rats with young rats in the Morris water maze (MWM) and the Open Field (OF) test. Both age groups improved their performance during the training period at a similar rate; however, the older rats performed worse in several parameters measured in the MWM. Our results suggest that already at the age of 18-20 months rats show changes in their approach to solve the spatial memory task while their ability to learn is not yet diminished. The disparate spatial information processing of the moderately aged rats provides a novel animal model for early age-related cognitive alterations that could be useful to test the effect of early intervention strategies. Moreover, our results suggest that the sensitivity of cognitive tests in the elderly could be substantially enhanced if they assess both the improvement after several trials, and the strategy used to solve a certain task.
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Affiliation(s)
- Linda Blümel
- Institute of Pharmacology and Toxicology, Department of Veterinary Medicine, Freie Universität Berlin, Germany.
| | - Jan Brosda
- Institute of Pharmacology and Toxicology, Department of Veterinary Medicine, Freie Universität Berlin, Germany.
| | - Bettina Bert
- Institute of Pharmacology and Toxicology, Department of Veterinary Medicine, Freie Universität Berlin, Germany.
| | - Melanie Hamann
- Institute of Pharmacology and Toxicology, Department of Veterinary Medicine, Freie Universität Berlin, Germany.
| | - Gunnar P H Dietz
- Department of Global Medical Affairs, Dr. Willmar Schwabe GmbH & Co. KG, Karlsruhe, Germany.
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Abstract
Until now, depression research has taken a surprisingly narrow approach to modelling the disease, mainly focusing on some form of psychomotor retardation within a mechanistic framework of depression etiology. However, depression has many symptoms and each is associated with a vast number of substrates. Thus, to deepen our insights, this SI ("Depression Symptoms") reviewed the behavioral and neurobiological sequelae of individual symptoms, specifically, psychomotor retardation, sadness, low motivation, fatigue, sleep/circadian disruption, weight/appetite changes, and cognitive affective biases. This manuscript aims to integrate the most central information provided by the individual reviews. As a result, a dynamic model of depression development is proposed, which views depression as a cumulative process, where different symptoms develop at different stages, referred to as early, intermediate, and advanced, that require treatment with different pharmaceutical agents, that is, selective serotonin reuptake inhibitors early on and dopamine-based antidepressants at the advanced stage. Furthermore, the model views hypothalamic disruption as the source of early symptoms and site of early intervention. Longitudinal animal models that are capable of modelling the different stages of depression, including transitions between the stages, may be helpful to uncover novel biomarkers and treatment approaches.
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Affiliation(s)
- Daniela Schulz
- Boğaziçi University, Institute of Biomedical Engineering, Center for Life Sciences and Technologies, Kandilli Campus, 34684 Istanbul, Turkey.
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7
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Mohammadi-Farani A, Pourmotabbed A, Ardeshirizadeh Y. Effects of HDAC inhibitors on spatial memory and memory extinction in SPS-induced PTSD rats. Res Pharm Sci 2020; 15:241-248. [PMID: 33088324 PMCID: PMC7540814 DOI: 10.4103/1735-5362.288426] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Revised: 02/06/2020] [Accepted: 02/25/2020] [Indexed: 11/04/2022] Open
Abstract
Background and purpose Neurobiological changes in memory processes seem to play a role in the pathophysiology of post-traumatic stress disorder (PTSD). Memory itself is influenced by PTSD, too. Histone deacetylase inhibitors (HDAIs) have shown promising results in the extinction of fear-related memories in animals and hence they seem to be important for the treatment of PTSD. Data are scarce about the effect of HDAIs in spatial memory formation/extinction in PTSD models. The main goal of the present work is to find the effect of sodium butyrate (NaBu), as an HDAI, on spatial memory and spatial memory extinction in rats exposed to single prolonged stress procedure (SPS). Experimental approach Different doses of NaBu were administered subcutaneously for 7 days in different groups of rats after SPS procedure. Learning, memory, and extinction of memory were evaluated in the Morris water maze test of spatial memory in 6 consecutive days. Findings / Results The results show that NaBu (0.5 mg/kg) alleviates impaired learning and memory in SPS rats. It also facilitates the extinction of newly formed memory in the animals. Conclusion and implications Our data suggest that the administration of HDAIs after a traumatic experience can prevent the aversive effects of SPS on spatial memory. It also reinforces the notion that extinction of spatial memory involves the same or similar brain circuitry that is involved in the extinction of fear memories in PTSD patients.
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Affiliation(s)
- Ahmad Mohammadi-Farani
- Pharmaceutical Sciences Research Center, Health Institute, Kermanshah University of Medical Sciences, Kermanshah, I.R. Iran.,Department of Pharmacology, Toxicology and Medical Services, School of Pharmacy, Kermanshah University of Medical Sciences, Kermanshah, I.R. Iran
| | - Ali Pourmotabbed
- Department of Physiology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, I.R. Iran
| | - Yazdan Ardeshirizadeh
- Student Research Committee, Kermanshah University of Medical Sciences, Kermanshah, I.R. Iran
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8
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Psychomotor retardation in depression: A critical measure of the forced swim test. Behav Brain Res 2019; 372:112047. [DOI: 10.1016/j.bbr.2019.112047] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 06/17/2019] [Accepted: 06/17/2019] [Indexed: 12/20/2022]
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9
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Xian Y, Ip S, Li H, Qu C, Su Z, Chen J, Lin Z. Isorhynchophylline exerts antidepressant‐like effects in mice
via
modulating neuroinflammation and neurotrophins: involvement of the PI3K/Akt/GSK‐3β signaling pathway. FASEB J 2019; 33:10393-10408. [DOI: 10.1096/fj.201802743rr] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Yan‐Fang Xian
- School of Chinese MedicineFaculty of MedicineThe Chinese University of Hong Kong Hong Kong China
- Brain Research CenterSchool of Chinese MedicineFaculty of MedicineThe Chinese University of Hong Kong Hong Kong China
| | - Siu‐Po Ip
- School of Chinese MedicineFaculty of MedicineThe Chinese University of Hong Kong Hong Kong China
- Brain Research CenterSchool of Chinese MedicineFaculty of MedicineThe Chinese University of Hong Kong Hong Kong China
| | - Hui‐Qin Li
- School of Chinese MedicineFaculty of MedicineThe Chinese University of Hong Kong Hong Kong China
| | - Chang Qu
- School of Chinese MedicineFaculty of MedicineThe Chinese University of Hong Kong Hong Kong China
| | - Zi‐Ren Su
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese MedicineMathematical Engineering Academy of Chinese MedicineGuangzhou University of Chinese Medicine Guangzhou China
| | - Jian‐Nan Chen
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese MedicineMathematical Engineering Academy of Chinese MedicineGuangzhou University of Chinese Medicine Guangzhou China
| | - Zhi‐Xiu Lin
- School of Chinese MedicineFaculty of MedicineThe Chinese University of Hong Kong Hong Kong China
- Brain Research CenterSchool of Chinese MedicineFaculty of MedicineThe Chinese University of Hong Kong Hong Kong China
- Hong Kong Institute of Integrative MedicineThe Chinese University of Hong Kong Hong Kong China
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10
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Abdel-Hafiz L, Chao OY, Huston JP, Nikolaus S, Spieler RE, de Souza Silva MA, Mattern C. Promnestic effects of intranasally applied pregnenolone in rats. Neurobiol Learn Mem 2016; 133:185-195. [DOI: 10.1016/j.nlm.2016.07.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Revised: 06/24/2016] [Accepted: 07/12/2016] [Indexed: 10/21/2022]
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11
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Klarić TS, Jaehne EJ, Koblar SA, Baune BT, Lewis MD. Alterations in anxiety and social behaviour in Npas4 deficient mice following photochemically-induced focal cortical stroke. Behav Brain Res 2016; 316:29-37. [PMID: 27574128 DOI: 10.1016/j.bbr.2016.08.050] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 08/21/2016] [Accepted: 08/25/2016] [Indexed: 01/04/2023]
Abstract
In addition to causing widespread cell death and loss of brain function, cerebral ischaemia also induces extensive neuroplasticity. In humans, stroke is often accompanied by severe cognitive and psychiatric changes that are thought to arise as a consequence of this infarct-induced remodelling. A candidate for producing these post-stroke neuropsychiatric changes is Npas4, an activity-dependent transcription factor involved in synaptic plasticity whose expression is aberrantly up-regulated following ischaemic injury. In this study we investigated the role of Npas4 in modulating these stroke-induced neuropsychiatric responses by comparing the performance of wildtype and Npas4-/- mice in various cognitive and behavioural tasks in a photochemical model of focal cortical stroke. We show that this stroke model results in impaired spatial recognition memory and a reduction in despair-like behaviour that affect both genotypes to a similar degree. Moreover, mice lacking Npas4 also show differences in some aspects of post-stroke sociability and anxiety. Specifically, we show that while stroke had no effect on anxiety levels in wildtype mice, Npas4-/- mice became significantly more anxious following stroke. In addition, Npas4-/- mice retained a greater level of sociability in the acute post-stroke period in comparison to their wildtype littermates. Thus, our findings suggest that Npas4 may be involved in post-stroke psychiatric changes related to anxiety and sociability.
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Affiliation(s)
- T S Klarić
- School of Medicine, University of Adelaide, North Terrace, Adelaide, SA, 5005, Australia
| | - E J Jaehne
- Discipline of Psychiatry, University of Adelaide, North Terrace, Adelaide, SA, 5005, Australia
| | - S A Koblar
- School of Medicine, University of Adelaide, North Terrace, Adelaide, SA, 5005, Australia
| | - B T Baune
- Discipline of Psychiatry, University of Adelaide, North Terrace, Adelaide, SA, 5005, Australia
| | - M D Lewis
- South Australian Health & Medical Research Institute, North Terrace, Adelaide, SA, 5000, Australia.
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12
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Campus P, Maiolati M, Orsini C, Cabib S. Altered consolidation of extinction-like inhibitory learning in genotype-specific dysfunctional coping fostered by chronic stress in mice. Behav Brain Res 2016; 315:23-35. [PMID: 27506654 DOI: 10.1016/j.bbr.2016.08.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2016] [Revised: 08/02/2016] [Accepted: 08/06/2016] [Indexed: 01/02/2023]
Abstract
Genetic and stress-related factors interact to foster mental disorders, possibly through dysfunctional learning. In a previous study we reported that a temporary experience of reduced food availability increases forced swim (FS)-induced helplessness tested 14days after a first experience in mice of the standard inbred C57BL/6(B6) strain but reduces it in mice of the genetically unrelated DBA/2J (D2) strain. Because persistence of FS-induced helplessness influences adaptive coping with stress challenge and involve learning processes the present study tested whether the behavioral effects of restricted feeding involved altered consolidation of FS-related learning. First, we demonstrated that restricted feeding does not influence behavior expressed on the first FS experience, supporting a specific effect on persistence rather then development of helplessness. Second, we found that FS-induced c-fos expression in the infralimbic cortex (IL) was selectively enhanced in food-restricted (FR) B6 mice and reduced in FR D2 mice, supporting opposite alterations of consolidation processes involving this brain area. Third, we demonstrated that immediate post-FS inactivation of IL prevents 24h retention of acquired helplessness by continuously free-fed mice of both strains, indicating the requirement of a functioning IL for consolidation of FS-related learning in either mouse strain. Finally, in line with the known role of IL in consolidation of extinction memories, we found that restricted feeding selectively facilitated 24h retention of an acquired extinction in B6 mice whereas impairing it in D2 mice. These findings support the conclusion that an experience of reduced food availability strain-specifically affects persistence of newly acquired passive coping strategies by altering consolidation of extinction-like inhibitory learning.
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MESH Headings
- Adaptation, Psychological/drug effects
- Adaptation, Psychological/physiology
- Analysis of Variance
- Animals
- Brain/drug effects
- Brain/metabolism
- Conditioning, Operant/drug effects
- Disease Models, Animal
- Escape Reaction/physiology
- Extinction, Psychological/drug effects
- Extinction, Psychological/physiology
- GABA-A Receptor Agonists/pharmacology
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Inbred DBA
- Muscimol/pharmacology
- Proto-Oncogene Proteins c-fos/metabolism
- Species Specificity
- Stress, Psychological/complications
- Stress, Psychological/pathology
- Swimming
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Affiliation(s)
- P Campus
- Department of Psychology, Center D. Bovet, Sapienza University of Rome, Rome, Italy; Fondazione Santa Lucia, IRCCS, Rome, Italy
| | - M Maiolati
- Department of Psychology, Center D. Bovet, Sapienza University of Rome, Rome, Italy
| | - C Orsini
- Department of Psychology, Center D. Bovet, Sapienza University of Rome, Rome, Italy; Fondazione Santa Lucia, IRCCS, Rome, Italy
| | - S Cabib
- Department of Psychology, Center D. Bovet, Sapienza University of Rome, Rome, Italy; Fondazione Santa Lucia, IRCCS, Rome, Italy.
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13
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Schulz D, Henn FA, Petri D, Huston JP. Rats bred for helplessness exhibit positive reinforcement learning deficits which are not alleviated by an antidepressant dose of the MAO-B inhibitor deprenyl. Neuroscience 2016; 329:83-92. [DOI: 10.1016/j.neuroscience.2016.04.049] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Revised: 04/16/2016] [Accepted: 04/29/2016] [Indexed: 01/14/2023]
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14
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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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15
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Wu X, Zhao N, Bai F, Li C, Liu C, Wei J, Zong W, Yang L, Ryabinin AE, Ma Y, Wang J. Morphine-induced conditioned place preference in rhesus monkeys: Resistance to inactivation of insula and extinction. Neurobiol Learn Mem 2016; 131:192-200. [PMID: 27101734 DOI: 10.1016/j.nlm.2016.04.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 03/07/2016] [Accepted: 04/16/2016] [Indexed: 01/23/2023]
Abstract
Drug addicts experience strong craving episodes in response to drug-associated cues. Attenuating these responses using pharmacological or behavioral approaches could aid recovery from addiction. Cue-induced drug seeking can be modeled using the conditioned place preference procedure (CPP). Our previous work showed that conditioned place preference (CPP) can be induced by administration of increasing doses of morphine in rhesus monkeys. Here, we investigated whether expression of morphine-induced CPP can be attenuated by inhibiting activity of insular cortex or by repeated unreinforced exposures to the CPP test. The insula has been demonstrated to be involved in addiction to several drugs of abuse. To test its role in morphine CPP, bilateral cannulae were implanted into the insula in seven adult monkeys. The CPP was established using a biased apparatus by intramuscular injections of morphine at increasing doses (1.5, 3.0 and 4.5mg/kg) for each monkey. After the monkeys established morphine CPP, their insulae were reversibly inactivated by bilateral microinjection with 5% lidocaine (40μl) prior to the post-conditioning test (expression) of CPP using a within-subject design. The microinjections of lidocaine failed to affect CPP expression when compared to saline injections. We subsequently investigated morphine-associated memory during six episodes of CPP tests performed in these monkeys over the following 75.0±0.2months. While the preference score showed a declining trend with repeated testing, morphine-induced CPP was maintained even on the last test performed at 75months post-conditioning. This observation indicated strong resistance of morphine-induced memories to extinction in rhesus monkeys. Although these data do not confirm involvement of insula in morphine-induced CPP, our observation that drug-associated memories can be maintained over six drug-free years following initial experience with morphine has important implications for treatment of drug addiction using extinction therapy.
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Affiliation(s)
- XuJun Wu
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China; Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, China
| | - Ning Zhao
- Second Department of Neurosurgery, First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Fan Bai
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
| | - ChuanYu Li
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
| | - CiRong Liu
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
| | - JingKuan Wei
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China; Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, China
| | - Wei Zong
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
| | - LiXin Yang
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
| | - Andrey E Ryabinin
- Department of Behavioral Neuroscience, Oregon Health & Science University, Portland, OR, USA
| | - YuanYe Ma
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
| | - JianHong Wang
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China.
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Dopamine in the nucleus accumbens core, but not shell, increases during signaled food reward and decreases during delayed extinction. Neurobiol Learn Mem 2015; 123:125-39. [DOI: 10.1016/j.nlm.2015.06.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Revised: 05/29/2015] [Accepted: 06/01/2015] [Indexed: 11/18/2022]
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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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Papini MR, Fuchs PN, Torres C. Behavioral neuroscience of psychological pain. Neurosci Biobehav Rev 2014; 48:53-69. [PMID: 25446953 DOI: 10.1016/j.neubiorev.2014.11.012] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Revised: 09/03/2014] [Accepted: 11/14/2014] [Indexed: 01/08/2023]
Abstract
Pain is a common word used to refer to a wide range of physical and mental states sharing hedonic aversive value. Three types of pain are distinguished in this article: Physical pain, an aversive state related to actual or potential injury and disease; social pain, an aversive emotion associated to social exclusion; and psychological pain, a negative emotion induced by incentive loss. This review centers on psychological pain as studied in nonhuman animals. After covering issues of terminology, the article briefly discusses the daily-life significance of psychological pain and then centers on a discussion of the results originating from two procedures involving incentive loss: successive negative contrast-the unexpected devaluation of a reward-and appetitive extinction-the unexpected omission of a reward. The evidence reviewed points to substantial commonalities, but also some differences and interactions between physical and psychological pains. This evidence is discussed in relation to behavioral, pharmacological, neurobiological, and genetic factors that contribute to the multidimensional experience of psychological pain.
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Affiliation(s)
- Mauricio R Papini
- Department of Psychology, Texas Christian University, United States.
| | - Perry N Fuchs
- Departments of Psychology and Biology, University of Texas Arlington, United States
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19
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Schoenfeld R, Foreman N, Leplow B. Ageing and spatial reversal learning in humans: findings from a virtual water maze. Behav Brain Res 2014; 270:47-55. [PMID: 24815214 DOI: 10.1016/j.bbr.2014.04.036] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Revised: 04/17/2014] [Accepted: 04/21/2014] [Indexed: 11/30/2022]
Abstract
Deterioration in spatial memory with normal ageing is well accepted. Animal research has shown spatial reversal learning to be most vulnerable to pathological changes in the brain, but this has never been tested in humans. We studied ninety participants (52% females, 20-80 yrs) in a virtual water maze with a reversal learning procedure. Neuropsychological functioning, mood and personality were assessed to control moderator effects. For data analysis, participants were subdivided post hoc into groups aged 20-24, 25-34, 35-44, 45-64 and 65-80 yrs. Initial spatial learning occurred in all age groups but 65-80-yrs-olds never reached the level of younger participants. When tested for delayed recall of spatial memory, younger people frequented the target area but those over 65 yrs did not. In spatial reversal learning, age groups over 45 yrs were deficient and the 65-80-yrs-olds showed no evidence of reversal. Spatial measures were associated with neuropsychological functioning. Extraversion and measures of depression moderated the age effect on the learning index with older introverted and non-depressed individuals showing better results. Measures of anxiety moderated the age effect on reversal learning with older people having higher anxiety scores showing a preserved reversal learning capability. Results confirmed age to be a major factor in spatial tasks but further showed neuropsychological functioning, psycho-affective determinants and personality traits to be significant predictors of individual differences.
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Affiliation(s)
- R Schoenfeld
- Institute of Psychology, Martin-Luther University Halle-Wittenberg, 06099 Halle (Saale), Germany.
| | - N Foreman
- International Laboratory of Neurophysiology of Virtual Reality, St.-Petersburg National Research University of Information Technology, Mechanics and Optics (ITMO), 197101 St.-Petersburg, Russia.
| | - B Leplow
- Institute of Psychology, Martin-Luther University Halle-Wittenberg, 06099 Halle (Saale), Germany.
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20
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Mao QQ, Huang Z, Zhong XM, Xian YF, Ip SP. Brain-derived neurotrophic factor signalling mediates the antidepressant-like effect of piperine in chronically stressed mice. Behav Brain Res 2014; 261:140-5. [DOI: 10.1016/j.bbr.2013.12.020] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Revised: 12/06/2013] [Accepted: 12/11/2013] [Indexed: 12/29/2022]
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21
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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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Huston JP, Silva MADS, Komorowski M, Schulz D, Topic B. Animal models of extinction-induced depression: Loss of reward and its consequences. Neurosci Biobehav Rev 2013; 37:2059-70. [DOI: 10.1016/j.neubiorev.2013.02.016] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2012] [Revised: 02/14/2013] [Accepted: 02/22/2013] [Indexed: 10/27/2022]
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23
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Honokiol reverses depressive-like behavior and decrease in brain BDNF levels induced by chronic corticosterone injections in mice. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.phcgj.2013.08.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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Cojocaru GR, Popa-Wagner A, Stanciulescu EC, Babadan L, Buga AM. Post-stroke depression and the aging brain. J Mol Psychiatry 2013; 1:14. [PMID: 25408907 PMCID: PMC4223891 DOI: 10.1186/2049-9256-1-14] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2013] [Accepted: 07/25/2013] [Indexed: 11/12/2022] Open
Abstract
Ageing is associated with changes in the function of various organ systems. Changes in the cardiovascular system affect both directly and indirectly the function in a variety of organs, including the brain, with consequent neurological (motor and sensory performance) and cognitive impairments, as well as leading to the development of various psychiatric diseases. Post-stroke depression (PSD) is among the most frequent neuropsychiatric consequences of cerebral ischemia. This review discusses several animal models used for the study of PSD and summarizes recent findings in the genomic profile of the ageing brain, which are associated with age-related disorders in the elderly. Since stroke and depression are diseases with increased incidence in the elderly, great clinical benefit may especially accrue from deciphering and targeting basic mechanisms underlying PSD. Finally, we discuss the relationship between ageing, circadian rhythmicity and PSD.
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Affiliation(s)
- Gabriel R Cojocaru
- Department of Functional Sciences, Center of Clinical and Experimental Medicine, University of Medicine and Pharmacy of Craiova, Petru Rares str., no 2, Craiova, 200349 Romania
| | - Aurel Popa-Wagner
- Department of Psychiatry, University of Medicine Rostock, Rostock, Germany
| | - Elena C Stanciulescu
- Faculty of Pharmacy, Chair of Biochemistry, University of Medicine and Pharmacy of Craiova, Craiova, 200349 Romania
| | - Loredana Babadan
- Department of Functional Sciences, Center of Clinical and Experimental Medicine, University of Medicine and Pharmacy of Craiova, Petru Rares str., no 2, Craiova, 200349 Romania
| | - Ana-Maria Buga
- Department of Functional Sciences, Center of Clinical and Experimental Medicine, University of Medicine and Pharmacy of Craiova, Petru Rares str., no 2, Craiova, 200349 Romania
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25
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Lesions of the nucleus accumbens disrupt reinforcement omission effects in rats. Behav Brain Res 2013; 252:439-43. [PMID: 23796973 DOI: 10.1016/j.bbr.2013.06.028] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Revised: 06/17/2013] [Accepted: 06/20/2013] [Indexed: 11/22/2022]
Abstract
The reinforcement omission effects (ROEs) have been attributed to both motivational and attentional consequences of the surprising reinforcement omission. Some studies have been showed amygdala is part of a circuit involved in the ROEs modulation. The view that amygdala lesions interfere with the ROEs is supported by evidence involving amygdala in responses correlated with motivational processes. These processes depend on the operation of separate amygdala areas and their connections with other brain systems. It has been suggested the interaction between the amygdala and the nucleus accumbens (NAC) is important to the modulation of motivational processes. Recent neuroimaging studies in human revealed reward delivery enhances activity of subcortical structures (NAC and amygdala), whereas reward omission reduces the activity in these same structures. The present study aimed to clarify whether the mechanisms related to ROEs depend on NAC. Prior to acquisition training, rats received bilateral excitotoxic lesions of NAC (NAC group) or sham lesions (Sham group). Following postoperative recovery, the rats were trained on a fixed-interval with limited hold signaled schedule of reinforcement. After acquisition of stable performance, the training was changed from 100% to 50% schedule of reinforcement. Both NAC and Sham groups presented the ROEs. However, after nonreinforcement, the response rates of the NAC group were lower than those registered in the Sham group. The performance of the NAC group decreased in the period following nonreinforcement when compared to the period preceding reinforcement omission. These findings suggest the NAC is part of the neural substrate involved in the ROEs modulation.
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26
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Huston JP, Silva MADS, Topic B, Müller CP. What's conditioned in conditioned place preference? Trends Pharmacol Sci 2013; 34:162-6. [DOI: 10.1016/j.tips.2013.01.004] [Citation(s) in RCA: 163] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Revised: 01/07/2013] [Accepted: 01/11/2013] [Indexed: 01/19/2023]
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27
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Loubinoux I, Kronenberg G, Endres M, Schumann-Bard P, Freret T, Filipkowski RK, Kaczmarek L, Popa-Wagner A. Post-stroke depression: mechanisms, translation and therapy. J Cell Mol Med 2013; 16:1961-9. [PMID: 22348642 PMCID: PMC3822966 DOI: 10.1111/j.1582-4934.2012.01555.x] [Citation(s) in RCA: 220] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
The interaction between depression and stroke is highly complex. Post-stroke depression (PSD) is among the most frequent neuropsychiatric consequences of stroke. Depression also negatively impacts stroke outcome with increased morbidity, mortality and poorer functional recovery. Antidepressants such as the commonly prescribed selective serotonin reuptake inhibitors improve stroke outcome, an effect that may extend far beyond depression, e.g., to motor recovery. The main biological theory of PSD is the amine hypothesis. Conceivably, ischaemic lesions interrupt the projections ascending from midbrain and brainstem, leading to a decreased bioavailability of the biogenic amines – serotonin (5HT), dopamine (DA) and norepinephrine (NE). Acetylcholine would also be involved. So far, preclinical and translational research on PSD is largely lacking. The implementation and characterization of suitable animal models is clearly a major prerequisite for deeper insights into the biological basis of post-stroke mood disturbances. Equally importantly, experimental models may also pave the way for the discovery of novel therapeutic targets. If we cannot prevent stroke, we shall try to limit its long-term consequences. This review therefore presents animal models of PSD and summarizes potential underlying mechanisms including genomic signatures, neurotransmitter and neurotrophin signalling, hippocampal neurogenesis, cellular plasticity in the ischaemic lesion, secondary degenerative changes, activation of the hypothalamo-pituitary-adrenal (HPA) axis and neuroinflammation. As stroke is a disease of the elderly, great clinical benefit may especially accrue from deciphering and targeting basic mechanisms underlying PSD in aged animals.
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Affiliation(s)
- Isabelle Loubinoux
- INSERM, Cerebral imaging and neurological handicaps UMR825, Toulouse, France
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28
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Topic B, Kröger I, Vildirasova PG, Huston JP. Indices of extinction-induced “depression” after operant learning using a runway vs. a cued free-reward delivery schedule. Neurobiol Learn Mem 2012; 98:329-40. [DOI: 10.1016/j.nlm.2012.09.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2012] [Revised: 09/24/2012] [Accepted: 09/24/2012] [Indexed: 10/27/2022]
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Distance from source of reward as a marker for extinction-induced “despair”: Modulation by the antidepressants clomipramine and citalopram. Neuroscience 2012; 223:152-62. [DOI: 10.1016/j.neuroscience.2012.07.064] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2012] [Revised: 07/15/2012] [Accepted: 07/29/2012] [Indexed: 01/07/2023]
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30
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Huston J, van den Brink J, Komorowski M, Huq Y, Topic B. Antidepressants reduce extinction-induced withdrawal and biting behaviors: a model for depressive-like behavior. Neuroscience 2012; 210:249-57. [DOI: 10.1016/j.neuroscience.2012.02.024] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2012] [Revised: 02/10/2012] [Accepted: 02/12/2012] [Indexed: 11/29/2022]
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31
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Mao QQ, Huang Z, Ip SP, Xian YF, Che CT. Peony glycosides reverse the effects of corticosterone on behavior and brain BDNF expression in rats. Behav Brain Res 2012; 227:305-9. [DOI: 10.1016/j.bbr.2011.11.016] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2011] [Revised: 11/08/2011] [Accepted: 11/12/2011] [Indexed: 12/30/2022]
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32
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Abstract
This protocol describes a simplified method for inducing a chronic depression-like state in mice that is based on the repeated open-space forced swim method originally developed for rats. The method consists of mice swimming daily in lukewarm water in rat tub cages, for 15 min/day for 4 days, and thereafter once per week. This procedure produces a progressive decrease in distance swum and a concomitant increase in immobility (floating) in ∼70% of the mice, both of which persist unaltered for weeks. The model has predictive, face, and construct validity and has a number of advantages over previous methods in that it utilizes very mild stress, is short in duration, and is easily standardized. Moreover, since it utilizes a greater swimming area than the traditional (Porsolt) method it can be used to study interactions of depressive behavior with behavioral flexibility and perseveration.
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Affiliation(s)
- Eric A Stone
- Department of Psychiatry, New York University Langone School of Medicine, New York, New York, USA
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33
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Münch D, Baker N, Kreibich CD, Bråten AT, Amdam GV. In the laboratory and during free-flight: old honey bees reveal learning and extinction deficits that mirror mammalian functional decline. PLoS One 2010; 5:e13504. [PMID: 20976061 PMCID: PMC2957435 DOI: 10.1371/journal.pone.0013504] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2009] [Accepted: 09/22/2010] [Indexed: 12/22/2022] Open
Abstract
Loss of brain function is one of the most negative and feared aspects of aging. Studies of invertebrates have taught us much about the physiology of aging and how this progression may be slowed. Yet, how aging affects complex brain functions, e.g., the ability to acquire new memory when previous experience is no longer valid, is an almost exclusive question of studies in humans and mammalian models. In these systems, age related cognitive disorders are assessed through composite paradigms that test different performance tasks in the same individual. Such studies could demonstrate that afflicted individuals show the loss of several and often-diverse memory faculties, and that performance usually varies more between aged individuals, as compared to conspecifics from younger groups. No comparable composite surveying approaches are established yet for invertebrate models in aging research. Here we test whether an insect can share patterns of decline similar to those that are commonly observed during mammalian brain aging. Using honey bees, we combine restrained learning with free-flight assays. We demonstrate that reduced olfactory learning performance correlates with a reduced ability to extinguish the spatial memory of an abandoned nest location (spatial memory extinction). Adding to this, we show that learning performance is more variable in old honey bees. Taken together, our findings point to generic features of brain aging and provide the prerequisites to model individual aspects of learning dysfunction with insect models.
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Affiliation(s)
- Daniel Münch
- Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Aas, Norway.
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34
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Aznar S, Klein AB, Santini MA, Knudsen GM, Henn F, Gass P, Vollmayr B. Aging and depression vulnerability interaction results in decreased serotonin innervation associated with reduced BDNF levels in hippocampus of rats bred for learned helplessness. Synapse 2010; 64:561-5. [DOI: 10.1002/syn.20773] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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35
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Long-term treatment with peony glycosides reverses chronic unpredictable mild stress-induced depressive-like behavior via increasing expression of neurotrophins in rat brain. Behav Brain Res 2010; 210:171-7. [PMID: 20176057 DOI: 10.1016/j.bbr.2010.02.026] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2009] [Revised: 02/10/2010] [Accepted: 02/12/2010] [Indexed: 12/20/2022]
Abstract
The root part of Paeonia lactiflora Pall., commonly known as peony, is a commonly used Chinese herb for the treatment of depression-like disorders. Previous studies in our laboratory have showed that total glycosides of peony (TGP) produced antidepressant-like action in various mouse models of behavioral despair. The present study aimed to investigate the mechanism(s) underlying the antidepressant-like action of TGP by measuring neurotrophins including brain-derived neurotrophic factor (BDNF) and nerve growth factor (NGF) in non-stressed and chronic unpredictable mild stress (CUMS)-treated rats. TGP (80 or 160 mg/kg/day) was administered by oral gavage to the animals for 5 weeks. The results showed that CUMS caused depression-like behavior in rats, as indicated by the significant decreases in sucrose consumption and locomotor activity (assessed by open-field test). In addition, it was found that BDNF contents in the hippocampus and frontal cortex were significantly decreased in CUMS-treated rats. CUMS treatment also significantly decreased the level of NGF in the frontal cortex of the animals. Daily intragastric administration of TGP (80 or 160 mg/kg/day) during the five weeks of CUMS significantly suppressed behavioral and biochemical changes induced by CUMS. Treating non-stressed animals with TGP (160 mg/kg) for 5 weeks also significantly increased BDNF contents in the hippocampus and frontal cortex, and NGF contents in the frontal cortex. The results suggest that the antidepressant-like action of TGP is mediated, at least in part, by increasing the expression of BDNF and NGF in selective brain tissues.
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