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Schwabe L. Memory Under Stress: From Adaptation to Disorder. Biol Psychiatry 2024:S0006-3223(24)01385-4. [PMID: 38880463 DOI: 10.1016/j.biopsych.2024.06.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 05/02/2024] [Accepted: 06/10/2024] [Indexed: 06/18/2024]
Abstract
Stressful events are ubiquitous in everyday life. Exposure to these stressors initiates the temporally orchestrated release of a multitude of hormones, peptides, and neurotransmitters that target brain areas that have been critically implicated in learning and memory. This review summarizes recent insights on the profound impact of stress on 4 fundamental processes of memory: memory formation, memory contextualization, memory retrieval, and memory flexibility. Stress mediators instigate dynamic alterations in these processes, thereby facilitating efficient responding under stress and the creation of a decontextualized memory representation that can effectively aid coping with novel future threats. While they are generally adaptive, the same stress-related changes may contribute to the rigid behaviors, uncontrollable intrusions, and generalized fear responding seen in anxiety disorders and posttraumatic stress disorder. Drawing on recent discoveries in cognitive neuroscience and psychiatry, this review discusses how stress-induced alterations in memory processes can simultaneously foster adaptation to stressors and fuel psychopathology. The transition from adaptive to maladaptive changes in the impact of stress on memory hinges on the nuanced interplay of stressor characteristics and individual predispositions. Thus, taking individual differences in the cognitive response to stressors into account is essential for any successful treatment of stress-related mental disorders.
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Affiliation(s)
- Lars Schwabe
- Department of Cognitive Psychology, Institute of Psychology, Universität Hamburg, Hamburg, Germany.
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2
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Zhang Y, Wang H, Liu L, Mo X, He D, Chen X, Xiao R, Cheng Q, Fatima M, Du Y, Xie P. Maternal separation regulates sensitivity of stress-induced depression in mice by affecting hippocampal metabolism. Physiol Behav 2024; 279:114530. [PMID: 38552706 DOI: 10.1016/j.physbeh.2024.114530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 03/11/2024] [Accepted: 03/26/2024] [Indexed: 04/08/2024]
Abstract
Depression is a serious mental illness. Previous studies found that early life stress (ELS) plays a vital role in the onset and progression of depression. However, relevant studies have not yet been able to explain the specific effects of early stress on stress-induced depression sensitivity and individual behavior during growth. Therefore, we constructed a maternal separation (MS) model and administered chronic social frustration stress at different stages of their growth while conducting metabolomics analysis on the hippocampus of mice. Our results showed that the immobility time of mice in the forced swimming test was significantly reduced at the end of MS. Meanwhile, mice with MS experience significantly decreased total movement distance in the open field test and sucrose preference ratio in the sucrose preference test when subjected to chronic social defeat stress (CSDS) during adolescence. In adulthood, the results were the opposite. In addition, we found that level changes in metabolites such as Beta-alanine, l-aspartic acid, 2-aminoadipic acid, and Glycine are closely related to behavioral changes. These metabolites are mainly enriched in Pantothenate, CoA biosynthesis, and Beta Alanine metabolism pathways. Our experiment revealed that the effects of ELS vary across different age groups. It will increase an individual's sensitivity to depression when facing CSDS in adolescence, but it will reduce their sensitivity to depression when facing CSDS in adulthood. This may be achieved by regulating the hippocampus's Pantothenate and CoA biosynthesis and Beta Alanine metabolism pathways represented by Beta-alanine, l-Aspartic acid, 2-aminoadipic acid, and Glycine metabolites.
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Affiliation(s)
- Yangdong Zhang
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China; Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Haiyang Wang
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Lanxiang Liu
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China; Department of Neurology, Yongchuan Hospital of Chongqing Medical University, Chongqing, 402160, China
| | - Xiaolong Mo
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China; Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Dian He
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China; Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Xueyi Chen
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China; Faculty of Basic Medicine, Department of Pathology, Chongqing Medical University, Chongqing, 400016, China
| | - Rui Xiao
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China; Faculty of Basic Medicine, Department of Pathology, Chongqing Medical University, Chongqing, 400016, China
| | - Qisheng Cheng
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China; Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Madiha Fatima
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Yamei Du
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Peng Xie
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China; Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China; Department of Neurology, Yongchuan Hospital of Chongqing Medical University, Chongqing, 402160, China.
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3
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Merz EC, Myers B, Hansen M, Simon KR, Strack J, Noble KG. Socioeconomic Disparities in Hypothalamic-Pituitary-Adrenal Axis Regulation and Prefrontal Cortical Structure. BIOLOGICAL PSYCHIATRY GLOBAL OPEN SCIENCE 2024; 4:83-96. [PMID: 38090738 PMCID: PMC10714216 DOI: 10.1016/j.bpsgos.2023.10.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 10/13/2023] [Accepted: 10/17/2023] [Indexed: 02/01/2024] Open
Abstract
Socioeconomic disadvantage during childhood predicts an increased risk for mental health problems across the life span. Socioeconomic disadvantage shapes multiple aspects of children's proximal environments and increases exposure to chronic stressors. Drawing from multiple literatures, we propose that childhood socioeconomic disadvantage may lead to adaptive changes in the regulation of stress response systems including the hypothalamic-pituitary-adrenal (HPA) axis. These changes, in turn, affect the development of prefrontal cortical (PFC) circuitry responsible for top-down control over cognitive and emotional processes. Translational findings indicate that chronic stress reduces dendritic complexity and spine density in the medial PFC and anterior cingulate cortex, in part through altered HPA axis regulation. Socioeconomic disadvantage has frequently been associated with reduced gray matter in the dorsolateral and ventrolateral PFC and anterior cingulate cortex and lower fractional anisotropy in the superior longitudinal fasciculus, cingulum bundle, and uncinate fasciculus during middle childhood and adolescence. Evidence of socioeconomic disparities in hair cortisol concentrations in children has accumulated, although null findings have been reported. Coupled with links between cortisol levels and reduced gray matter in the PFC and anterior cingulate cortex, these results support mechanistic roles for the HPA axis and these PFC circuits. Future longitudinal studies should simultaneously consider multiple dimensions of proximal factors, including cognitive stimulation, while focusing on epigenetic processes and genetic moderators to elucidate how socioeconomic context may influence the HPA axis and PFC circuitry involved in cognitive and emotional control. These findings, which point to modifiable factors, can be harnessed to inform policy and more effective prevention strategies.
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Affiliation(s)
- Emily C. Merz
- Department of Psychology, Colorado State University, Fort Collins, Colorado
| | - Brent Myers
- Department of Biomedical Sciences, Colorado State University, Fort Collins, Colorado
| | - Melissa Hansen
- Department of Psychology, Colorado State University, Fort Collins, Colorado
| | - Katrina R. Simon
- Department of Biobehavioral Sciences, Teachers College, Columbia University, New York, New York
| | - Jordan Strack
- Department of Psychology, Colorado State University, Fort Collins, Colorado
| | - Kimberly G. Noble
- Department of Biobehavioral Sciences, Teachers College, Columbia University, New York, New York
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4
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Perica MI, Luna B. Impact of stress on excitatory and inhibitory markers of adolescent cognitive critical period plasticity. Neurosci Biobehav Rev 2023; 153:105378. [PMID: 37643681 PMCID: PMC10591935 DOI: 10.1016/j.neubiorev.2023.105378] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 08/24/2023] [Accepted: 08/25/2023] [Indexed: 08/31/2023]
Abstract
Adolescence is a time of significant neurocognitive development. Prolonged maturation of prefrontal cortex (PFC) through adolescence has been found to support improvements in executive function. Changes in excitatory and inhibitory mechanisms of critical period plasticity have been found to be present in the PFC through adolescence, suggesting that environment may have a greater effect on development during this time. Stress is one factor known to affect neurodevelopment increasing risk for psychopathology. However, less is known about how stress experienced during adolescence could affect adolescent-specific critical period plasticity mechanisms and cognitive outcomes. In this review, we synthesize findings from human and animal literatures looking at the experience of stress during adolescence on cognition and frontal excitatory and inhibitory neural activity. Studies indicate enhancing effects of acute stress on cognition and excitation within specific contexts, while chronic stress generally dampens excitatory and inhibitory processes and impairs cognition. We propose a model of how stress could affect frontal critical period plasticity, thus potentially altering neurodevelopmental trajectories that could lead to risk for psychopathology.
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Affiliation(s)
- Maria I Perica
- Department of Psychology, University of Pittsburgh, PA, USA.
| | - Beatriz Luna
- Department of Psychology, University of Pittsburgh, PA, USA
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5
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Mancini GF, Meijer OC, Campolongo P. Stress in adolescence as a first hit in stress-related disease development: Timing and context are crucial. Front Neuroendocrinol 2023; 69:101065. [PMID: 37001566 DOI: 10.1016/j.yfrne.2023.101065] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 03/22/2023] [Accepted: 03/25/2023] [Indexed: 04/06/2023]
Abstract
The two-hit stress model predicts that exposure to stress at two different time-points in life may increase or decrease the risk of developing stress-related disorders later in life. Most studies based on the two-hit stress model have investigated early postnatal stress as the first hit with adult stress as the second hit. Adolescence, however, represents another highly sensitive developmental window during which exposure to stressful events may affect programming outcomes following exposure to stress in adulthood. Here, we discuss the programming effects of different types of stressors (social and nonsocial) occurring during adolescence (first hit) and how such stressors affect the responsiveness toward an additional stressor occurring during adulthood (second hit) in rodents. We then provide a comprehensive overview of the potential mechanisms underlying interindividual and sex differences in the resilience/susceptibility to developing stress-related disorders later in life when stress is experienced in two different life stages.
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Affiliation(s)
- Giulia F Mancini
- Dept. of Physiology and Pharmacology, Sapienza University of Rome, 00185 Rome, Italy; Department of Medicine, Division of Endocrinology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands
| | - Onno C Meijer
- Department of Medicine, Division of Endocrinology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands
| | - Patrizia Campolongo
- Dept. of Physiology and Pharmacology, Sapienza University of Rome, 00185 Rome, Italy; Neuropsychopharmacology Unit, IRCSS Fondazione Santa Lucia, 00143 Rome, Italy.
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6
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Moon AL, Clifton NE, Wellard N, Thomas KL, Hall J, Brydges NM. Social interaction following prepubertal stress alters prefrontal gene expression associated with cell signalling and oligodendrocytes. Transl Psychiatry 2022; 12:516. [PMID: 36526621 PMCID: PMC9758144 DOI: 10.1038/s41398-022-02280-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 11/18/2022] [Accepted: 12/02/2022] [Indexed: 12/23/2022] Open
Abstract
Early-life adversity is associated with an increased risk of psychopathology, including mood disorders, later in life. Early-life stress affects several physiological systems, however, the exact mechanisms underlying pathological risk are not fully understood. This knowledge is crucial in developing appropriate therapeutic interventions. The prepubertal period is documented as a key developmental period for the maturation of the prefrontal cortex (PFC), a brain region involved in higher cognitive functions, including social function. In this study, we performed RNA sequencing on the PFC of adult rats who had experienced prepubertal stress (PPS) and controls to investigate the genome-wide consequences of this stress. PPS alters social behaviour in adulthood, therefore we also performed RNA sequencing on PPS and control rats following a social interaction test to determine social activity-dependent gene changes. At a baseline state (1 week following a social interaction test), no genes were differentially expressed in the PPS group. However, 1603 genes were differentially expressed in PPS rats compared to controls following a social interaction. These genes were enriched in biological pathways associated with cell signalling and axon myelination dynamics. Cell enrichment analysis showed these genes were associated with oligodendrocytes, and a comparison with an existing early-life stress sequencing dataset showed that pathways linked to oligodendrocyte morphology are impacted in a range of models of early-life stress in rodents. In conclusion, we identify pathways, including those involved in axon myelination, that are differentially activated in the adult in response to social stimulation following PPS. These differential responses may contribute to vulnerability to psychiatric pathology.
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Affiliation(s)
- Anna L Moon
- Neuroscience and Mental Health Research Institute, Cardiff University, Hadyn Ellis Building, Maindy Road, Cardiff, CF24 4HQ, UK
| | - Nicholas E Clifton
- Neuroscience and Mental Health Research Institute, Cardiff University, Hadyn Ellis Building, Maindy Road, Cardiff, CF24 4HQ, UK.,MRC Centre for Neuropsychiatric Genetics and Genomics, Cardiff University, Hadyn Ellis Building, Maindy Road, Cardiff, CF24 4HQ, UK
| | - Natalie Wellard
- Neuroscience and Mental Health Research Institute, Cardiff University, Hadyn Ellis Building, Maindy Road, Cardiff, CF24 4HQ, UK
| | - Kerrie L Thomas
- Neuroscience and Mental Health Research Institute, Cardiff University, Hadyn Ellis Building, Maindy Road, Cardiff, CF24 4HQ, UK.,School of Biosciences, Cardiff University, Museum Avenue, Cardiff, CF10 3AX, UK
| | - Jeremy Hall
- Neuroscience and Mental Health Research Institute, Cardiff University, Hadyn Ellis Building, Maindy Road, Cardiff, CF24 4HQ, UK.,MRC Centre for Neuropsychiatric Genetics and Genomics, Cardiff University, Hadyn Ellis Building, Maindy Road, Cardiff, CF24 4HQ, UK
| | - Nichola M Brydges
- Neuroscience and Mental Health Research Institute, Cardiff University, Hadyn Ellis Building, Maindy Road, Cardiff, CF24 4HQ, UK.
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7
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Hazra S, Hazra JD, Bar-On RA, Duan Y, Edut S, Cao X, Richter-Levin G. The role of hippocampal CaMKII in resilience to trauma-related psychopathology. Neurobiol Stress 2022; 21:100506. [PMID: 36532378 PMCID: PMC9755065 DOI: 10.1016/j.ynstr.2022.100506] [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: 10/14/2022] [Revised: 11/22/2022] [Accepted: 11/29/2022] [Indexed: 12/05/2022] Open
Abstract
Traumatic stress exposure can form persistent trauma-related memories. However, only a minority of individuals develop post-traumatic stress disorder (PTSD) symptoms upon exposure. We employed a rat model of PTSD, which enables differentiating between exposed-affected and exposed-unaffected individuals. Two weeks after the end of exposure, male rats were tested behaviorally, following an exposure to a trauma reminder, identifying them as trauma 'affected' or 'unaffected.' In light of the established role of hippocampal synaptic plasticity in stress and the essential role of Ca2+/calmodulin-dependent protein kinase II (CaMKII) in hippocampal based synaptic plasticity, we pharmacologically inhibited CaMKII or knocked-down (kd) αCaMKII (in two separate experiments) in the dorsal dentate gyrus of the hippocampus (dDG) following exposure to the same trauma paradigm. Both manipulations brought down the prevalence of 'affected' individuals in the trauma-exposed population. A day after the last behavioral test, long-term potentiation (LTP) was examined in the dDG as a measure of synaptic plasticity. Trauma exposure reduced the ability to induce LTP, whereas, contrary to expectation, αCaMKII-kd reversed this effect. Further examination revealed that reducing αCaMKII expression enables the formation of αCaMKII-independent LTP, which may enable increased resilience in the face of a traumatic experience. The current findings further emphasize the pivotal role dDG has in stress resilience.
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Affiliation(s)
- Somoday Hazra
- Sagol Department of Neurobiology, University of Haifa, Haifa, Mount Carmel, 3498838, Israel
- The Integrated Brain and Behavior Research Center IBBR, University of Haifa, Mount Carmel, 3498838, Israel
| | - Joyeeta Dutta Hazra
- Sagol Department of Neurobiology, University of Haifa, Haifa, Mount Carmel, 3498838, Israel
- The Integrated Brain and Behavior Research Center IBBR, University of Haifa, Mount Carmel, 3498838, Israel
| | - Rani Amit Bar-On
- Faculty of Social Sciences, University of Haifa, Mount Carmel, 3498838, Israel
| | - Yanhong Duan
- Key Laboratory of Brain Functional Genomics, Ministry of Education, Shanghai Key Laboratory of Brain Functional Genomics, School of Life Sciences, East China Normal University, Shanghai, 200062, China
| | - Shahaf Edut
- Sagol Department of Neurobiology, University of Haifa, Haifa, Mount Carmel, 3498838, Israel
| | - Xiaohua Cao
- Key Laboratory of Brain Functional Genomics, Ministry of Education, Shanghai Key Laboratory of Brain Functional Genomics, School of Life Sciences, East China Normal University, Shanghai, 200062, China
| | - Gal Richter-Levin
- Sagol Department of Neurobiology, University of Haifa, Haifa, Mount Carmel, 3498838, Israel
- The Integrated Brain and Behavior Research Center IBBR, University of Haifa, Mount Carmel, 3498838, Israel
- Psychology Department, University of Haifa, Mount Carmel, 3498838, Israel
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8
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Kalenik AM, Topolski M, Górnik J, Wolańczyk T. The impact of the COVID-19 pandemic on the mental health of children with psychiatric diagnoses - multidimensional CCPCA Model. BMC Psychiatry 2022; 22:495. [PMID: 35870970 PMCID: PMC9308485 DOI: 10.1186/s12888-022-04144-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 07/13/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The study aimed to assess the severity of symptoms of anxiety and depression in children with previously diagnosed psychiatric disorders during the COVID-19 pandemic in Poland. METHODS Online questionnaires were used to investigate three groups of subjects: patients with a psychiatric diagnosis, primary school pupils, and children from children's homes. A total of 167 children with their parents or guardians participated in the study. In addition to basic statistics, a multidimensional Centroid Class Principal Component Analysis (CCPCA) model was used. RESULTS It was found that the strongest fear of the coronavirus was experienced by children from children's homes, while the most severe depressive symptoms and state anxiety were observed among patients diagnosed with psychiatric disorders. Parental care by assisting with school education and lack of close contact with other people (less than two metres) at parents/guardians' work had the most potent protective effect in reducing the fear of COVID-19. CONCLUSIONS There is a need for further research in children and adolescents to develop effective strategies for protecting their mental well-being when faced with social isolation or disease.
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Affiliation(s)
- Anna Maria Kalenik
- Department of Child Psychiatry, Medical University of Warsaw, Żwirki i Wigury 63A, 02-191, Warsaw, Poland.
| | - Mariusz Topolski
- grid.7005.20000 0000 9805 3178Faculty of Information and Communication Technology, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wroclaw, Poland
| | - Justyna Górnik
- grid.13339.3b0000000113287408Department of Child Psychiatry, Medical University of Warsaw, Żwirki i Wigury 63A, 02-191 Warsaw, Poland
| | - Tomasz Wolańczyk
- grid.13339.3b0000000113287408Department of Child Psychiatry, Medical University of Warsaw, Żwirki i Wigury 63A, 02-191 Warsaw, Poland
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9
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Albrecht A, Segal M, Stork O. Allostatic gene regulation of inhibitory synaptic factors in the rat ventral hippocampus in a juvenile/adult stress model of psychopathology. Eur J Neurosci 2022; 55:2142-2153. [DOI: 10.1111/ejn.15091] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 12/11/2020] [Accepted: 12/15/2020] [Indexed: 11/27/2022]
Affiliation(s)
- Anne Albrecht
- Institute of Anatomy Otto‐von‐Guericke‐University Magdeburg Magdeburg Germany
- Center for Behavioral Brain Sciences CBBS Magdeburg Germany
| | - Menahem Segal
- Department of Neurobiology The Weizmann Institute Rehovot Israel
| | - Oliver Stork
- Center for Behavioral Brain Sciences CBBS Magdeburg Germany
- Institute of Biology Otto‐von‐Guericke‐University Magdeburg Magdeburg Germany
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10
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Chronic hM4Di-DREADD-Mediated Chemogenetic Inhibition of Forebrain Excitatory Neurons in Postnatal or Juvenile Life Does Not Alter Adult Mood-Related Behavior. eNeuro 2022; 9:ENEURO.0381-21.2021. [PMID: 35115382 PMCID: PMC8856708 DOI: 10.1523/eneuro.0381-21.2021] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Revised: 12/21/2021] [Accepted: 12/25/2021] [Indexed: 11/21/2022] Open
Abstract
G-protein-coupled receptors (GPCRs) coupled to Gi signaling, in particular downstream of monoaminergic neurotransmission, are posited to play a key role during developmental epochs (postnatal and juvenile) in shaping the emergence of adult anxiodepressive behaviors and sensorimotor gating. To address the role of Gi signaling in these developmental windows, we used a CaMKIIα-tTA::TRE hM4Di bigenic mouse line to express the hM4Di-DREADD (designer receptor exclusively activated by designer drugs) in forebrain excitatory neurons and enhanced Gi signaling via chronic administration of the DREADD agonist, clozapine-N-oxide (CNO) in the postnatal window (postnatal days 2–14) or the juvenile window (postnatal days 28–40). We confirmed that the expression of the HA-tagged hM4Di-DREADD was restricted to CaMKIIα-positive neurons in the forebrain, and that the administration of CNO in postnatal or juvenile windows evoked inhibition in forebrain circuits of the hippocampus and cortex, as indicated by a decline in expression of the neuronal activity marker c-Fos. hM4Di-DREADD-mediated inhibition of CaMKIIα-positive forebrain excitatory neurons in postnatal or juvenile life did not impact the weight profile of mouse pups, and also did not influence the normal ontogeny of sensory reflexes. Further, postnatal or juvenile hM4Di-DREADD-mediated inhibition of CaMKIIα-positive forebrain excitatory neurons did not alter anxiety- or despair-like behaviors in adulthood and did not impact sensorimotor gating. Collectively, these results indicate that chemogenetic induction of Gi signaling in CaMKIIα-positive forebrain excitatory neurons in postnatal and juvenile temporal windows does not appear to impinge on the programming of anxiodepressive behaviors in adulthood.
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11
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Woodward EM, Coutellier L. Age- and sex-specific effects of stress on parvalbumin interneurons in preclinical models: Relevance to sex differences in clinical neuropsychiatric and neurodevelopmental disorders. Neurosci Biobehav Rev 2021; 131:1228-1242. [PMID: 34718048 PMCID: PMC8642301 DOI: 10.1016/j.neubiorev.2021.10.031] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 10/06/2021] [Accepted: 10/23/2021] [Indexed: 01/06/2023]
Abstract
Stress is a major risk factor for neurodevelopmental and neuropsychiatric disorders, with the capacity to impact susceptibility to disease as well as long-term neurobiological and behavioral outcomes. Parvalbumin (PV) interneurons, the most prominent subtype of GABAergic interneurons in the cortex, are uniquely responsive to stress due to their protracted development throughout the highly plastic neonatal period and into puberty and adolescence. Additionally, PV + interneurons appear to respond to stress in a sex-specific manner. This review aims to discuss existing preclinical studies that support our overall hypothesis that the sex-and age-specific impacts of stress on PV + interneurons contribute to differences in individual vulnerability to stress across the lifespan, particularly in regard to sex differences in the diagnostic rate of neurodevelopmental and neuropsychiatric diseases in clinical populations. We also emphasize the importance of studying sex as a biological variable to fully understand the mechanistic and behavioral differences between males and females in models of neuropsychiatric disease.
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Affiliation(s)
- Emma M Woodward
- Department of Neuroscience, Ohio State University, 255 Institute for Behavioral Medicine Research Building, 460 Medical Center Drive, Columbus, OH, 43210, United States
| | - Laurence Coutellier
- Department of Neuroscience, Ohio State University, 255 Institute for Behavioral Medicine Research Building, 460 Medical Center Drive, Columbus, OH, 43210, United States; Department of Psychology, Ohio State University, 53 Psychology Building, 1835 Neil Avenue, Columbus, OH, 43210, United States.
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12
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Nagy SA, Kürtös Z, Németh N, Perlaki G, Csernela E, Lakner FE, Dóczi T, Czéh B, Simon M. Childhood maltreatment results in altered deactivation of reward processing circuits in depressed patients: A functional magnetic resonance imaging study of a facial emotion recognition task. Neurobiol Stress 2021; 15:100399. [PMID: 34646916 PMCID: PMC8495173 DOI: 10.1016/j.ynstr.2021.100399] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 09/01/2021] [Accepted: 09/14/2021] [Indexed: 11/25/2022] Open
Abstract
Importance and objectives Childhood adversity is a strong risk factor for the development of various psychopathologies including major depressive disorder (MDD). However, not all depressed patients experience early life trauma. Functional magnetic resonance imaging (fMRI) studies using facial emotion processing tasks have documented altered blood-oxygen-level-dependent (BOLD) responses in specific cortico-limbic networks both in MDD patients and in individuals with a history of childhood maltreatment (CM). Therefore, a history of maltreatment may represent a key modulating factor responsible for the altered processing of socio-affective stimuli. To test this hypothesis, we recruited MDD patients with and without of maltreatment history to study the long-term consequences of childhood trauma and examined the impact of CM on brain activity using a facial emotion recognition fMRI task. Methods MDD patients with childhood maltreatment (MDD + CM, n = 21), MDD patients without maltreatment (MDD, n = 19), and healthy controls (n = 21) matched for age, sex and intelligence quotient underwent fMRI while performing a block design facial emotion matching task with images portraying negative emotions (fear, anger and sadness). The history of maltreatment was assessed with the 28-item Childhood Trauma Questionnaire. Results Both MDD and MDD + CM patients displayed impaired accuracy to recognize sad faces. Analysis of brain activity revealed that MDD + CM patients had significantly reduced negative BOLD signals in their right accumbens, subcallosal cortex, and anterior paracingulate gyrus compared to controls. Furthermore, MDD + CM patients had a significantly increased negative BOLD response in their right precentral and postcentral gyri compared to controls. We found little difference between MDD and MDD + CM patients, except that MDD + CM patients had reduced negative BOLD response in their anterior paracingulate gyrus relative to the MDD group. Conclusions Our present data provide evidence that depressed patients with a history of maltreatment are impaired in facial emotion recognition and that they display altered functioning of key reward-related fronto-striatal circuits during a facial emotion matching task. History of childhood maltreatment (CM) can alter socio-cognitive functioning in adults. We studied depressed patients with and without CM with age, gender and IQ matched controls. Brain activity was assessed with fMRI using a facial emotion matching task. CM patients had impaired accuracy to recognize facial emotions, especially sadness. CM patients had altered negative BOLD signals in their fronto-striatal circuits.
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Affiliation(s)
- Szilvia Anett Nagy
- Neurobiology of Stress Research Group, Szentágothai János Research Centre, University of Pécs, Pécs, Hungary.,MTA-PTE, Clinical Neuroscience MR Research Group, Pécs, Hungary.,Department of Neurosurgery, Medical School, University of Pécs, Pécs, Hungary.,Pécs Diagnostic Centre, Pécs, Hungary.,Department of Laboratory Medicine, Medical School, University of Pécs, Pécs, Hungary
| | - Zsófia Kürtös
- Neurobiology of Stress Research Group, Szentágothai János Research Centre, University of Pécs, Pécs, Hungary.,Pécs Diagnostic Centre, Pécs, Hungary
| | - Nándor Németh
- Neurobiology of Stress Research Group, Szentágothai János Research Centre, University of Pécs, Pécs, Hungary
| | - Gábor Perlaki
- MTA-PTE, Clinical Neuroscience MR Research Group, Pécs, Hungary.,Department of Neurosurgery, Medical School, University of Pécs, Pécs, Hungary.,Pécs Diagnostic Centre, Pécs, Hungary
| | - Eszter Csernela
- Neurobiology of Stress Research Group, Szentágothai János Research Centre, University of Pécs, Pécs, Hungary
| | - Flóra Elza Lakner
- Neurobiology of Stress Research Group, Szentágothai János Research Centre, University of Pécs, Pécs, Hungary.,Department of Laboratory Medicine, Medical School, University of Pécs, Pécs, Hungary
| | - Tamás Dóczi
- MTA-PTE, Clinical Neuroscience MR Research Group, Pécs, Hungary.,Department of Neurosurgery, Medical School, University of Pécs, Pécs, Hungary.,Pécs Diagnostic Centre, Pécs, Hungary
| | - Boldizsár Czéh
- Neurobiology of Stress Research Group, Szentágothai János Research Centre, University of Pécs, Pécs, Hungary.,Department of Laboratory Medicine, Medical School, University of Pécs, Pécs, Hungary
| | - Maria Simon
- Neurobiology of Stress Research Group, Szentágothai János Research Centre, University of Pécs, Pécs, Hungary.,Department of Psychiatry and Psychotherapy, Medical School, University of Pécs, Hungary
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13
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Annamneedi A, del Angel M, Gundelfinger ED, Stork O, Çalışkan G. The Presynaptic Scaffold Protein Bassoon in Forebrain Excitatory Neurons Mediates Hippocampal Circuit Maturation: Potential Involvement of TrkB Signalling. Int J Mol Sci 2021; 22:ijms22157944. [PMID: 34360710 PMCID: PMC8347324 DOI: 10.3390/ijms22157944] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 07/23/2021] [Accepted: 07/23/2021] [Indexed: 12/30/2022] Open
Abstract
A presynaptic active zone organizer protein Bassoon orchestrates numerous important functions at the presynaptic active zone. We previously showed that the absence of Bassoon exclusively in forebrain glutamatergic presynapses (BsnEmx1cKO) in mice leads to developmental disturbances in dentate gyrus (DG) affecting synaptic excitability, morphology, neurogenesis and related behaviour during adulthood. Here, we demonstrate that hyperexcitability of the medial perforant path-to-DG (MPP-DG) pathway in BsnEmx1cKO mice emerges during adolescence and is sustained during adulthood. We further provide evidence for a potential involvement of tropomyosin-related kinase B (TrkB), the high-affinity receptor for brain-derived neurotrophic factor (BDNF), mediated signalling. We detect elevated TrkB protein levels in the dorsal DG of adult mice (~3–5 months-old) but not in adolescent (~4–5 weeks-old) mice. Electrophysiological analysis reveals increased field-excitatory-postsynaptic-potentials (fEPSPs) in the DG of the adult, but not in adolescent BsnEmx1cKO mice. In line with an increased TrkB expression during adulthood in BsnEmx1cKO, blockade of TrkB normalizes the increased synaptic excitability in the DG during adulthood, while no such effect was observed in adolescence. Accordingly, neurogenesis, which has previously been found to be increased in adult BsnEmx1cKO mice, was unaffected at adolescent age. Our results suggest that Bassoon plays a crucial role in the TrkB-dependent postnatal maturation of the hippocampus.
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Affiliation(s)
- Anil Annamneedi
- Institute of Biology, Otto-Von-Guericke University, 39120 Magdeburg, Germany; (M.d.A.); (O.S.)
- Center for Behavioral Brain Sciences (CBBS), 39120 Magdeburg, Germany;
- Leibniz Institute for Neurobiology (LIN), RG Neuroplasticity, 39118 Magdeburg, Germany
- Correspondence: (A.A.); (G.Ç.)
| | - Miguel del Angel
- Institute of Biology, Otto-Von-Guericke University, 39120 Magdeburg, Germany; (M.d.A.); (O.S.)
| | - Eckart D. Gundelfinger
- Center for Behavioral Brain Sciences (CBBS), 39120 Magdeburg, Germany;
- Leibniz Institute for Neurobiology (LIN), RG Neuroplasticity, 39118 Magdeburg, Germany
- Institute of Pharmacology & Toxicology, Medical Faculty, Otto-von-Guericke University, 39120 Magdeburg, Germany
| | - Oliver Stork
- Institute of Biology, Otto-Von-Guericke University, 39120 Magdeburg, Germany; (M.d.A.); (O.S.)
- Center for Behavioral Brain Sciences (CBBS), 39120 Magdeburg, Germany;
| | - Gürsel Çalışkan
- Institute of Biology, Otto-Von-Guericke University, 39120 Magdeburg, Germany; (M.d.A.); (O.S.)
- Center for Behavioral Brain Sciences (CBBS), 39120 Magdeburg, Germany;
- Correspondence: (A.A.); (G.Ç.)
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14
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Reducing glutamic acid decarboxylase in the dorsal dentate gyrus attenuates juvenile stress induced emotional and cognitive deficits. Neurobiol Stress 2021; 15:100350. [PMID: 34150959 PMCID: PMC8193143 DOI: 10.1016/j.ynstr.2021.100350] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 05/11/2021] [Accepted: 05/28/2021] [Indexed: 11/22/2022] Open
Abstract
A high degree of regional, temporal and molecular specificity is evident in the regulation of GABAergic signaling in stress-responsive circuitry, hampering the use of systemic GABAergic modulators for the treatment of stress-related psychopathology. Here we investigated the effectiveness of local intervention with the GABA synthetic enzymes GAD65 and GAD67 in the dorsal dentate gyrus (dDG) vs ventral DG (vDG) to alleviate anxiety-like behavior and stress-induced symptoms in the rat. We induced shRNA-mediated knock down of either GAD65 or GAD67 with lentiviral vectors microinjected into the dDG or vDG of young adult male rats and examined anxiety behavior, learning and memory performance. Subsequently we tested whether reducing GAD65 expression in the dDG would also confer resilience against juvenile stress-induced behavioral and physiological symptoms in adulthood. While knock down of either isoform in the vDG increased anxiety levels in the open field and the elevated plus maze tests, the knock down of GAD65, but not GAD67, in the dDG conferred a significant reduction in anxiety levels. Strikingly, this manipulation also attenuated juvenile stress evoked anxiety behavior, cognitive and synaptic plasticity impairments. Local GABAergic circuitry in the DG plays an important and highly region-specific role in control of emotional behavior and stress responding. Reduction of GAD65 expression in the dDG appears to provide resilience to juvenile stress-induced emotional and cognitive deficits, opening a new direction towards addressing a significant risk factor for developing stress and trauma-related psychopathologies later in life. GAD67/65 in the dorsal/ventral dentate gyrus differentially modulate anxiety. Reduced GAD65 expression in the dorsal dentate gyrus supports stress resilience. The dorsal dentate gyrus plays a key role in stress resilience.
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15
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Tapocik JD, Schank JR, Mitchell JR, Damazdic R, Mayo CL, Brady D, Pincus AB, King CE, Heilig M, Elmer GI. Live predator stress in adolescence results in distinct adult behavioral consequences and dorsal diencephalic brain activation patterns. Behav Brain Res 2021; 400:113028. [PMID: 33309751 PMCID: PMC8056471 DOI: 10.1016/j.bbr.2020.113028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 11/17/2020] [Accepted: 11/20/2020] [Indexed: 02/07/2023]
Abstract
Exposure to traumatic events during childhood increases the risk of adult psychopathology, including anxiety, depression, alcohol use disorders and their co-morbidity. Early life trauma also results in increased symptom complexity, treatment resistance and poor treatment outcomes. The purpose of this study was to establish a novel rodent model of adolescent stress, based on an ethologically relevant life-threatening event, live predator exposure. Rats were exposed to a live predator for 10 min. at three different time points (postnatal day (PND)31, 46 and 61). Adult depression-, anxiety-like behaviors and ethanol consumption were characterized well past the last acute stress event (two weeks). Behavioral profiles across assessments were developed to characterize individual response to adolescent stress. CNS activation patterns in separate groups of subjects were characterized after the early (PND31) and last predator exposure (PND61). Subjects exposed to live-predator adolescent stress generally exhibited less exploratory behavior, less propensity to venture into open spaces, a decreased preference for sweet solutions and decreased ethanol consumption in a two-bottle preference test. Additional studies demonstrated blunted cortisol response and CNS activation patterns suggestive of habenula, rostromedial tegmental (RMTg), dorsal raphe and central amygdala involvement in mediating the adult consequences of adolescent stress. Thus, adolescent stress in the form of live-predator exposure results in significant adult behavioral and neurobiological disturbances. Childhood trauma, its impact on neurodevelopment and the subsequent development of mood disorders is a pervasive theme in mental illness. Improving animal models and our neurobiological understanding of the symptom domains impacted by trauma could significantly improve treatment strategies.
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Affiliation(s)
- J D Tapocik
- Lab. of Clinical and Translational Studies, NIAAA, NIH, Bethesda, MD, 20817, United States
| | - J R Schank
- Lab. of Clinical and Translational Studies, NIAAA, NIH, Bethesda, MD, 20817, United States
| | - J R Mitchell
- Department of Psychology, Colby College, Waterville, ME, 04901, United States
| | - R Damazdic
- Lab. of Clinical and Translational Studies, NIAAA, NIH, Bethesda, MD, 20817, United States
| | - C L Mayo
- Maryland Psychiatric Research Center, Department of Psychiatry, University of Maryland School of Medicine, Baltimore, MD 21228, United States
| | - D Brady
- Maryland Psychiatric Research Center, Department of Psychiatry, University of Maryland School of Medicine, Baltimore, MD 21228, United States
| | - A B Pincus
- Lab. of Clinical and Translational Studies, NIAAA, NIH, Bethesda, MD, 20817, United States
| | - C E King
- Lab. of Clinical and Translational Studies, NIAAA, NIH, Bethesda, MD, 20817, United States
| | - M Heilig
- Lab. of Clinical and Translational Studies, NIAAA, NIH, Bethesda, MD, 20817, United States
| | - G I Elmer
- Maryland Psychiatric Research Center, Department of Psychiatry, University of Maryland School of Medicine, Baltimore, MD 21228, United States; Department of Pharmacology, University of Maryland School of Medicine, Baltimore, MD 21201, United States.
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16
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Albrecht A, Ben-Yishay E, Richter-Levin G. Behavioral profiling reveals an enhancement of dentate gyrus paired pulse inhibition in a rat model of PTSD. Mol Cell Neurosci 2021; 111:103601. [PMID: 33545324 DOI: 10.1016/j.mcn.2021.103601] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 12/02/2020] [Accepted: 01/28/2021] [Indexed: 11/27/2022] Open
Abstract
We recently introduced behavioral profiling as a translational approach to increase the validity of animal models of posttraumatic stress disorder (PTSD). Behavioral profiling utilizes the response of a 'normal population' of control animals and compares the performance of animals with a history of traumatic stress in different behavioral tests that can capture PTSD-like symptoms. Thus, affected, PTSD-like individuals can be subdivided from resilient trauma-exposed animals. While in our recent study we focused mainly on tests for activity and anxiety, we now expand the behavioral tests battery and include also fear memory and extinction tasks as well as a spatial object recognition test in our behavioral profiling approach. Utilizing underwater trauma as the traumatic event, we found that only a small subset of animals exposed to underwater trauma showed lasting increases in anxiety-like behavior and heightened emotional memory formation. Adding juvenile stress as a model for childhood adversity increased the prevalence of such affected animals and furthermore and induced additional cognitive deficits in a subgroup of such emotionally affected individuals. In addition, multiple affected individual rats displayed increased local circuit activity in the dorsal dentate gyrus, as measured in vivo with paired pulse protocols in anesthetized animals. Together, our findings highlight behavioral profiling, refined by including multiple behavioral tests, as a valid tool to identify PTSD-like vs. resilient individual animals and further suggest that enhanced local inhibition in specific circuits of the dorsal dentate gyrus may be associated with the observed symptoms.
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Affiliation(s)
- Anne Albrecht
- Sagol Department of Neurobiology, University of Haifa, 199 Aba-Hushi Avenue, 3498838 Haifa, Israel; The Integrated Brain and Behavior Research Center (IBBRC), 199 Aba-Hushi Avenue, 3498838 Haifa, Israel; Institute of Anatomy, Otto-von-Guericke University Magdeburg, Leipziger Str. 44, 39120 Magdeburg, Germany; Center for Behavioral Brain Sciences (CBBS), Universitätsplatz 2, 39106 Magdeburg, Germany.
| | - Elhanan Ben-Yishay
- Sagol Department of Neurobiology, University of Haifa, 199 Aba-Hushi Avenue, 3498838 Haifa, Israel; The Integrated Brain and Behavior Research Center (IBBRC), 199 Aba-Hushi Avenue, 3498838 Haifa, Israel
| | - Gal Richter-Levin
- Sagol Department of Neurobiology, University of Haifa, 199 Aba-Hushi Avenue, 3498838 Haifa, Israel; The Integrated Brain and Behavior Research Center (IBBRC), 199 Aba-Hushi Avenue, 3498838 Haifa, Israel; Department of Psychology, University of Haifa, 199 Aba-Hushi Avenue, 3498838 Haifa, Israel
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17
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Mueller FS, Scarborough J, Schalbetter SM, Richetto J, Kim E, Couch A, Yee Y, Lerch JP, Vernon AC, Weber-Stadlbauer U, Meyer U. Behavioral, neuroanatomical, and molecular correlates of resilience and susceptibility to maternal immune activation. Mol Psychiatry 2021; 26:396-410. [PMID: 33230204 PMCID: PMC7850974 DOI: 10.1038/s41380-020-00952-8] [Citation(s) in RCA: 79] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 10/24/2020] [Accepted: 11/04/2020] [Indexed: 12/13/2022]
Abstract
Infectious or noninfectious maternal immune activation (MIA) is an environmental risk factor for psychiatric and neurological disorders with neurodevelopmental etiologies. Whilst there is increasing evidence for significant health consequences, the effects of MIA on the offspring appear to be variable. Here, we aimed to identify and characterize subgroups of isogenic mouse offspring exposed to identical MIA, which was induced in C57BL6/N mice by administration of the viral mimetic, poly(I:C), on gestation day 12. Cluster analysis of behavioral data obtained from a first cohort containing >150 MIA and control offspring revealed that MIA offspring could be stratified into distinct subgroups that were characterized by the presence or absence of multiple behavioral dysfunctions. The two subgroups also differed in terms of their transcriptional profiles in cortical and subcortical brain regions and brain networks of structural covariance, as measured by ex vivo structural magnetic resonance imaging (MRI). In a second, independent cohort containing 50 MIA and control offspring, we identified a subgroup of MIA offspring that displayed elevated peripheral production of innate inflammatory cytokines, including IL-1β, IL-6, and TNF-α, in adulthood. This subgroup also showed significant impairments in social approach behavior and sensorimotor gating, whereas MIA offspring with a low inflammatory cytokine status did not. Taken together, our results highlight the existence of subgroups of MIA-exposed offspring that show dissociable behavioral, transcriptional, brain network, and immunological profiles even under conditions of genetic homogeneity. These data have relevance for advancing our understanding of the variable neurodevelopmental effects induced by MIA and for biomarker-guided approaches in preclinical psychiatric research.
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Affiliation(s)
- Flavia S Mueller
- Institute of Pharmacology and Toxicology, University of Zurich-Vetsuisse, Zurich, Switzerland
| | - Joseph Scarborough
- Institute of Pharmacology and Toxicology, University of Zurich-Vetsuisse, Zurich, Switzerland
| | - Sina M Schalbetter
- Institute of Pharmacology and Toxicology, University of Zurich-Vetsuisse, Zurich, Switzerland
| | - Juliet Richetto
- Institute of Pharmacology and Toxicology, University of Zurich-Vetsuisse, Zurich, Switzerland
- Neuroscience Center Zurich, University of Zurich and ETH Zurich, Zurich, Switzerland
| | - Eugene Kim
- Department of Neuroimaging, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Amalie Couch
- Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Yohan Yee
- Mouse Imaging Centre, Hospital for Sick Children, Toronto, ON, Canada
| | - Jason P Lerch
- Mouse Imaging Centre, Hospital for Sick Children, Toronto, ON, Canada
- Wellcome Centre for Integrative Neuroimaging, University of Oxford, Oxford, UK
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | - Anthony C Vernon
- Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
- MRC Centre for Neurodevelopmental Disorders, King's College London, London, UK
| | - Ulrike Weber-Stadlbauer
- Institute of Pharmacology and Toxicology, University of Zurich-Vetsuisse, Zurich, Switzerland
- Neuroscience Center Zurich, University of Zurich and ETH Zurich, Zurich, Switzerland
| | - Urs Meyer
- Institute of Pharmacology and Toxicology, University of Zurich-Vetsuisse, Zurich, Switzerland.
- Neuroscience Center Zurich, University of Zurich and ETH Zurich, Zurich, Switzerland.
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18
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Neonatal proinflammatory challenge evokes a microglial response and affects the ratio between subtypes of GABAergic interneurons in the hippocampus of juvenile rats: sex-dependent and sex-independent effects. Brain Struct Funct 2021; 226:563-574. [DOI: 10.1007/s00429-020-02199-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 12/16/2020] [Indexed: 10/22/2022]
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19
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Chou D. Topiramate inhibits offensive aggression through targeting ventrolateral periaqueductal gray. Neuropharmacology 2020; 181:108361. [PMID: 33096107 DOI: 10.1016/j.neuropharm.2020.108361] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 10/06/2020] [Accepted: 10/16/2020] [Indexed: 01/07/2023]
Abstract
Topiramate is an approved antiepileptic drug clinically used to treat epilepsy and prevent migraines. Currently, topiramate has been found to be effective in treating aggressive symptoms in neuropsychiatric patients. In preclinical studies, however, the effects and mechanisms of topiramate on offensive aggression are still largely uninvestigated. Our previous studies indicated that glutamatergic transmission in the ventrolateral periaqueductal gray (vlPAG) plays a crucial role in regulating elements of offensive aggressive behaviors. In the present work, we investigated the actions of topiramate on vlPAG glutamatergic transmission and aggressive behaviors in group-housed (GH) and socially isolated (SI) rats. The results suggested that a single injection of topiramate systemically and dose-dependently inhibited elements of offensive aggressive behaviors of both GH and SI rats in the resident-intruder test (RIT), with long-lasting effective time profiles in SI rats. Moreover, systemic single administration of topiramate reduced the frequency and amplitude of miniature excitatory postsynaptic currents (mEPSCs) in the vlPAG. Bath perfusion of topiramate directly decreased the frequency and amplitude of mEPSCs and shortened the amplitude of evoked excitatory postsynaptic currents (EPSCs) in the vlPAG. Furthermore, intra-vlPAG single microinjection of topiramate dose-dependently inhibited offensive aggressive behaviors in GH and SI rats in a time-dependent manner. Additionally, both systemic and local topiramate inhibited offensive aggressive behaviors in a (2R,6R)-hydroxynorketamine (HNK)-dependent rat model. In conclusion, the present results suggest that topiramate exerts anti-aggressive roles through its inhibitory actions on glutamatergic activities in the vlPAG. These preclinical results support topiramate as a candidate drug to treat patients with heightened offensive aggression.
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Affiliation(s)
- Dylan Chou
- Department of Physiology, Zhuhai Campus of Zunyi Medical University, Zhuhai, Guangdong, China.
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20
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Tzanoulinou S, Gantelet E, Sandi C, Márquez C. Programming effects of peripubertal stress on spatial learning. Neurobiol Stress 2020; 13:100282. [PMID: 33344733 PMCID: PMC7739188 DOI: 10.1016/j.ynstr.2020.100282] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 11/03/2020] [Accepted: 11/25/2020] [Indexed: 01/30/2023] Open
Abstract
Exposure to adversity during early life can have profound influences on brain function and behavior later in life. The peripubertal period is emerging as an important time-window of susceptibility to stress, with substantial evidence documenting long-term consequences in the emotional and social domains. However, little is known about how stress during this period impacts subsequent cognitive functioning. Here, we assessed potential long-term effects of peripubertal stress on spatial learning and memory using the water maze task. In addition, we interrogated whether individual differences in stress-induced behavioral and endocrine changes are related to the degree of adaptation of the corticosterone response to repeated stressor exposure during the peripubertal period. We found that, when tested at adulthood, peripubertally stressed animals displayed a slower learning rate. Strikingly, the level of spatial orientation in the water maze completed on the last training day was predicted by the degree of adaptation of the recovery -and not the peak-of the corticosterone response to stressor exposure (i.e., plasma levels at 60 min post-stressor) across the peripubertal stress period. In addition, peripubertal stress led to changes in emotional and glucocorticoid reactivity to novelty exposure, as well as in the expression levels of the plasticity molecule PSA-NCAM in the hippocampus. Importantly, by assessing the same endpoints in another peripubertally stressed cohort tested during adolescence, we show that the observed effects at adulthood are the result of a delayed programming manifested at adulthood and not protracted effects of stress. Altogether, our results support the view that the degree of stress-induced adaptation of the hypothalamus-pituitary-adrenal axis responsiveness at the important transitional period of puberty relates to the long-term programming of cognition, behavior and endocrine reactivity.
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Affiliation(s)
- S Tzanoulinou
- Laboratory of Behavioral Genetics, Brain Mind Institute, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - E Gantelet
- Laboratory of Behavioral Genetics, Brain Mind Institute, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - C Sandi
- Laboratory of Behavioral Genetics, Brain Mind Institute, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - C Márquez
- Laboratory of Neural Circuits of Social Behavior, Instituto de Neurociencias (Universidad Miguel Hernández-Consejo Superior de Investigaciones Científicas), San Juan de Alicante, Spain
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21
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Albrecht A, Redavide E, Regev-Tsur S, Stork O, Richter-Levin G. Hippocampal GABAergic interneurons and their co-localized neuropeptides in stress vulnerability and resilience. Neurosci Biobehav Rev 2020; 122:229-244. [PMID: 33188820 DOI: 10.1016/j.neubiorev.2020.11.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 10/05/2020] [Accepted: 11/01/2020] [Indexed: 12/13/2022]
Abstract
Studies in humans and rodents suggest a critical role for the hippocampal formation in cognition and emotion, but also in the adaptation to stressful events. Successful stress adaptation promotes resilience, while its failure may lead to stress-induced psychopathologies such as depression and anxiety disorders. Hippocampal architecture and physiology is shaped by its strong control of activity via diverse classes of inhibitory interneurons that express typical calcium binding proteins and neuropeptides. Celltype-specific opto- and chemogenetic intervention strategies that take advantage of these biochemical markers have bolstered our understanding of the distinct role of different interneurons in anxiety, fear and stress adaptation. Moreover, some of the signature proteins of GABAergic interneurons have a potent impact on emotion and cognition on their own, making them attractive targets for interventions. In particular, neuropeptide Y is a promising endogenous agent for mediating resilience against severe stress. In this review, we evaluate the role of the major types of interneurons across hippocampal subregions in the adaptation to chronic and acute stress and to emotional memory formation.
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Affiliation(s)
- Anne Albrecht
- Institute of Anatomy, Otto-von-Guericke-University Magdeburg, Leipziger Str. 44, 39120 Magdeburg, Germany; Center for Behavioral Brain Science, Universitätsplatz 2, 39106 Magdeburg, Germany.
| | - Elisa Redavide
- Institute of Anatomy, Otto-von-Guericke-University Magdeburg, Leipziger Str. 44, 39120 Magdeburg, Germany; Center for Behavioral Brain Science, Universitätsplatz 2, 39106 Magdeburg, Germany; Department of Genetics & Molecular Neurobiology, Institute of Biology, Otto-von-Guericke-University Magdeburg, Leipziger Str. 44, 39120 Magdeburg, Germany; Institute of Pharmacology and Toxicology, Otto-von-Guericke-University Magdeburg, Leipziger Str. 44, 39120 Magdeburg, Germany.
| | - Stav Regev-Tsur
- Sagol Department of Neurobiology, University of Haifa, 199 Aba-Hushi Avenue, 3498838 Haifa, Israel; The Integrated Brain and Behavior Research Center (IBBR), University of Haifa, 199 Aba-Hushi Avenue, 3498838 Haifa, Israel.
| | - Oliver Stork
- Center for Behavioral Brain Science, Universitätsplatz 2, 39106 Magdeburg, Germany; Department of Genetics & Molecular Neurobiology, Institute of Biology, Otto-von-Guericke-University Magdeburg, Leipziger Str. 44, 39120 Magdeburg, Germany.
| | - Gal Richter-Levin
- Sagol Department of Neurobiology, University of Haifa, 199 Aba-Hushi Avenue, 3498838 Haifa, Israel; The Integrated Brain and Behavior Research Center (IBBR), University of Haifa, 199 Aba-Hushi Avenue, 3498838 Haifa, Israel; Psychology Department, University of Haifa199 Aba-Hushi Avenue, 3498838 Haifa, Israel.
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Norepinephrine and glucocorticoid effects on the brain mechanisms underlying memory accuracy and generalization. Mol Cell Neurosci 2020; 108:103537. [DOI: 10.1016/j.mcn.2020.103537] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 07/31/2020] [Accepted: 08/10/2020] [Indexed: 12/19/2022] Open
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Bouchatta O, Chaibi I, Baba AA, Ba-M'Hamed S, Bennis M. The effects of Topiramate on isolation-induced aggression: a behavioral and immunohistochemical study in mice. Psychopharmacology (Berl) 2020; 237:2451-2467. [PMID: 32430516 DOI: 10.1007/s00213-020-05546-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Accepted: 05/05/2020] [Indexed: 10/24/2022]
Abstract
Topiramate, an antiepileptic drug, has been found to be useful for the treatment of aggression in clinical populations. Most preclinical studies related to Topiramate have been focused exclusively on the quantitative aspects of the aggressive behavior between mice. However, there is still limited knowledge regarding the effects of Topiramate on neuronal mechanisms occurring in aggressive mice. The present work aims to understand further the effects of the antiepileptic drug Topiramate on aggressive behaviors, and on the neural correlates underlying such behaviors. To achieve this, we combined the resident-intruder model of isolation-induced aggression in mice with two drug regimens of Topiramate administration (30.0 mg/kg; acute and sub-chronic treatments). Our data showed that both acute and subchronic treatments decreased the intensity of agonistic encounters and reinforced social behavior. By using C-fos immunoreactivity, we investigated the neuronal activation of several brain regions involved in aggressive behavior following subchronic treatment. We found that Topiramate produced activation in several cortical areas and in the lateral septum of resident brain mice compared with their controls. However, Topiramate induced inhibition in the medial nucleus of the amygdala, the dorsomedial nucleus of the periaqueductal gray, and especially in the anterior hypothalamic nucleus. Finally, we performed microinfusion of Topiramate (0.1 and 0.3 mM) into the lateral septum and anterior hypothalamus on offensive behaviors in isolation-induced-aggression paradigm. Interestingly, the microinfusion of Topiramate into the lateral septum has the capacity to alleviate aggressive behavior, without affecting social behavior. However, the microinfusion of Topiramate into the anterior hypothalamus decreased aggressive behavior and slightly reinforced social behavior. Our observations supported that the dose of 0.1 mM of Topiramate appeared more efficacy to treat aggression in adult mice. These pharmacological characteristics may account for Topiramate efficacy on aggressive symptoms in psychiatric patients.
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Affiliation(s)
- Otmane Bouchatta
- Laboratory of Pharmacology, Neurobiology and Behavior, Faculty of Sciences Semlalia, Cadi Ayyad University, Bd. Prince My Abdallah, 40000, Marrakesh, Morocco
| | - Ilias Chaibi
- Laboratory of Pharmacology, Neurobiology and Behavior, Faculty of Sciences Semlalia, Cadi Ayyad University, Bd. Prince My Abdallah, 40000, Marrakesh, Morocco
| | - Abdelfatah Ait Baba
- Laboratory of Pharmacology, Neurobiology and Behavior, Faculty of Sciences Semlalia, Cadi Ayyad University, Bd. Prince My Abdallah, 40000, Marrakesh, Morocco
| | - Saadia Ba-M'Hamed
- Laboratory of Pharmacology, Neurobiology and Behavior, Faculty of Sciences Semlalia, Cadi Ayyad University, Bd. Prince My Abdallah, 40000, Marrakesh, Morocco
| | - Mohamed Bennis
- Laboratory of Pharmacology, Neurobiology and Behavior, Faculty of Sciences Semlalia, Cadi Ayyad University, Bd. Prince My Abdallah, 40000, Marrakesh, Morocco.
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Long-Term Impact of Early-Life Stress on Hippocampal Plasticity: Spotlight on Astrocytes. Int J Mol Sci 2020; 21:ijms21144999. [PMID: 32679826 PMCID: PMC7404101 DOI: 10.3390/ijms21144999] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 07/10/2020] [Accepted: 07/13/2020] [Indexed: 12/15/2022] Open
Abstract
Adverse experiences during childhood are among the most prominent risk factors for developing mood and anxiety disorders later in life. Early-life stress interventions have been established as suitable models to study the neurobiological basis of childhood adversity in rodents. Different models such as maternal separation, impaired maternal care and juvenile stress during the postweaning/prepubertal life phase are utilized. Especially within the limbic system, they induce lasting alterations in neuronal circuits, neurotransmitter systems, neuronal architecture and plasticity that are further associated with emotional and cognitive information processing. Recent studies found that astrocytes, a special group of glial cells, have altered functions following early-life stress as well. As part of the tripartite synapse, astrocytes interact with neurons in multiple ways by affecting neurotransmitter uptake and metabolism, by providing gliotransmitters and by providing energy to neurons within local circuits. Thus, astrocytes comprise powerful modulators of neuronal plasticity and are well suited to mediate the long-term effects of early-life stress on neuronal circuits. In this review, we will summarize current findings on altered astrocyte function and hippocampal plasticity following early-life stress. Highlighting studies for astrocyte-related plasticity modulation as well as open questions, we will elucidate the potential of astrocytes as new targets for interventions against stress-induced neuropsychiatric disorders.
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Regev-Tsur S, Demiray YE, Tripathi K, Stork O, Richter-Levin G, Albrecht A. Region-specific involvement of interneuron subpopulations in trauma-related pathology and resilience. Neurobiol Dis 2020; 143:104974. [PMID: 32561495 DOI: 10.1016/j.nbd.2020.104974] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 02/12/2020] [Accepted: 06/13/2020] [Indexed: 01/22/2023] Open
Abstract
Only a minority of trauma-exposed individuals develops Posttraumatic stress disorder (PTSD) and active processes may support trauma resilience. Individual behavioral profiling allows investigating neurobiological alterations related to resilience or pathology in animal models of PTSD and is utilized here to examine the activation of different interneuron subpopulations of the dentate gyrus-amygdala system associated with trauma resilience or pathology. To model PTSD, rats were exposed to juvenile stress combined with underwater trauma (UWT) in adulthood. Four weeks later, individual anxiety levels were assessed in the elevated plus maze test for classifying rats as highly anxious 'affected' vs. 'non-affected', i.e. behaving as control animals. Analyzing the activation of specific interneuron subpopulations in the dorsal and ventral dentate gyrus (DG), the basolateral (BLA) and central amygdala by immunohistochemical double-labeling for cFos and different interneuron markers, revealed an increased activation of cholecystokinin (CCK)-positive interneurons in the ventral DG, together with increased activation of parvalbumin- and CCK-positive interneurons in the BLA of affected trauma-exposed rats. By contrast, increased activation of neuropeptide Y (NPY)-positive interneurons was observed in the dorsal DG of trauma-exposed, but non-affected rats. To test for a direct contribution of NPY in the dorsal DG to trauma resilience, a local shRNA-mediated knock down was performed after UWT. Such a treatment significantly reduced the prevalence of resilient animals. Our results suggest that distinct interneuron populations are associated with resilience or pathology in PTSD with high regional specificity. NPY within the dorsal DG was found to significantly contribute to trauma resilience.
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Affiliation(s)
- Stav Regev-Tsur
- Sagol Department of Neurobiology, University of Haifa, Israel; The Integrated Brain and Behavior Research Center (IBBR), University of Haifa, Israel; Psychology Department, University of Haifa, Israel
| | - Yunus Emre Demiray
- Department of Genetics & Molecular Neurobiology, Institute of Biology, Otto-von-Guericke-University Magdeburg, Germany
| | | | - Oliver Stork
- Department of Genetics & Molecular Neurobiology, Institute of Biology, Otto-von-Guericke-University Magdeburg, Germany; Center for Behavioral Brain Science, Magdeburg, Germany.
| | - Gal Richter-Levin
- Sagol Department of Neurobiology, University of Haifa, Israel; The Integrated Brain and Behavior Research Center (IBBR), University of Haifa, Israel; Psychology Department, University of Haifa, Israel.
| | - Anne Albrecht
- Sagol Department of Neurobiology, University of Haifa, Israel; The Integrated Brain and Behavior Research Center (IBBR), University of Haifa, Israel; Department of Genetics & Molecular Neurobiology, Institute of Biology, Otto-von-Guericke-University Magdeburg, Germany; Center for Behavioral Brain Science, Magdeburg, Germany
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Abstract
Early life stress (ELS) is a risk factor in the development of psychiatric disorders. The underlying biological mechanisms governing this phenomenon are not fully understood, but dysregulation of stress responses is likely to play a key role. Males and females differ in their propensity to develop psychiatric disorders, with far higher rates of anxiety, major depressive disorder, affective disorders and post-traumatic stress disorder found in women. We hypothesized that sex differences in response to ELS may play a crucial role in differential vulnerability between the sexes. To test this, we evaluated the consequences of pre-pubertal stress (PPS) on the HPA axis in adult female and male Lister Hooded rats. PPS animals were exposed to swim, restraint and elevated platform stress on postnatal days 25-27, controls remained in their home cage. Once adult, animals were either a) sacrificed directly and brains collected or b) sacrificed 20 minutes or 1 week after a social test and trunk blood collected. In the female hippocampal formation, PPS increased expression of FKBP5 and AVPR1a. In the female prefrontal cortex, PPS resulted in increased glucocorticoid receptor expression, increased glucocorticoid:mineralocorticoid (GR:MR) receptor expression ratio and decreased AVPR1a expression. Females exposed to PPS did not show the normal rise in blood corticosterone levels following a social interaction test. In contrast, PPS did not alter the expression of oxytocin or oxytocin receptors, and no effects of PPS were seen in males. However, striking sex differences were found. Females had higher oxytocin receptor expression in the prefrontal cortex and AVPR1a and oxytocin expression in the hypothalamus, whereas males demonstrated higher expression of GR, MR, GR:MR, FKBP5 and oxytocin receptor in the hypothalamus. These results demonstrate heightened reactivity of the female HPA axis to PPS and may help explain why in humans females display an increased susceptibility to certain stress-related psychopathologies.LAY SUMMARYWomen are at greater risk of developing several psychiatric illnesses. Using a rodent model, we show that the female stress system is more reactive to the lasting effects of early life stress. This heightened reactivity of the female stress response may help explain why women are at a greater risk of developing psychiatric disorders.
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Affiliation(s)
- Nichola M Brydges
- Neuroscience and Mental Health Research Institute, Cardiff University, Cardiff, UK
| | - Caroline Best
- Neuroscience and Mental Health Research Institute, Cardiff University, Cardiff, UK
| | - Kerrie L Thomas
- Neuroscience and Mental Health Research Institute, Cardiff University, Cardiff, UK
- School of Biosciences, Cardiff University, Cardiff, UK
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Ardi Z, Richter-Levin A, Xu L, Cao X, Volkmer H, Stork O, Richter-Levin G. The role of the GABAA receptor Alpha 1 subunit in the ventral hippocampus in stress resilience. Sci Rep 2019; 9:13513. [PMID: 31534228 PMCID: PMC6751196 DOI: 10.1038/s41598-019-49824-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 08/22/2019] [Indexed: 01/10/2023] Open
Abstract
Pre-pubertal stress increases post-traumatic stress disorder (PTSD) susceptibility. We have previously demonstrated that enriched environment (EE) intervention immediately after pre-pubertal stress protects from the effects of trauma in adulthood. Here, we examined whether exposure to EE would also be beneficial if applied after exposure to trauma in adulthood. We have recently shown that exposure to juvenile stress and under-water trauma (UWT) is associated with increased expression of GABAA receptor subunit α1 in the ventral hippocampus. However, differentiating between affected and unaffected individuals, this increased expression was confined to stress-exposed, behaviorally unaffected individuals, suggesting upregulation of α1 expression as a potential mechanism of resilience. We now examined whether EE-induced resilience renders increased expression of α1 in the ventral hippocampus redundant when facing a trauma later in life. Adult rats were exposed to UWT, with pre-exposure to juvenile stress, and tested in the open field and elevated plus maze paradigms four weeks later. EE exposure during juvenility prevented pre-pubertal stress-induced vulnerability, but not if performed following UWT in adulthood. Furthermore, juvenile EE exposure prevented the trauma-associated increase in α1 expression levels. Our findings emphasize the importance of early interventions in order to reduce the likelihood of developing psychopathologies in adulthood.
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Affiliation(s)
- Z Ardi
- Sagol Department of Neuroscience, University of Haifa, Haifa, 3498838, Israel.,Department of Behavioral Sciences, Kinneret Academic College, Sea of Galilee, Tiberias, Israel.,Sagol Center for Brain and Mind, Baruch Ivcher School of Psychology, Interdisciplinary Center (IDC), Herzliya, Israel
| | - A Richter-Levin
- The Integrated Brain and Behavior Research Center (IBBR), University of Haifa, Haifa, 3498838, Israel
| | - L Xu
- Key Laboratory of Animal Models and Human Disease Mechanisms, and Laboratory of Learning and Memory, Kunming Institute of Zoology, The Chinese Academy of Sciences, Kunming, 650223, China.,CAS Centre for Excellence in Brain Science and Intelligent Technology, Shanghai, 200031, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - X Cao
- Key Laboratory of Brain Functional Genomics, MOE&STCSM, East China Normal University, Shanghai, 200062, China
| | - H Volkmer
- Deptartment Molecular Biology, Natural and Medical Sciences Institute at the University of Tübingen, Markwiesenstr. 55, 72770, Reutlingen, Germany
| | - O Stork
- Department of Genetics & Molecular Neurobiology, Institute of Biology, Otto-von-Guericke University Magdeburg, Magdeburg, 39120, Germany
| | - G Richter-Levin
- Sagol Department of Neuroscience, University of Haifa, Haifa, 3498838, Israel. .,The Integrated Brain and Behavior Research Center (IBBR), University of Haifa, Haifa, 3498838, Israel. .,Department of Psychology, University of Haifa, Haifa, 3498838, Israel.
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28
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Ivens S, Çalışkan G, Papageorgiou I, Cesetti T, Malich A, Kann O, Heinemann U, Stork O, Albrecht A. Persistent increase in ventral hippocampal long‐term potentiation by juvenile stress: A role for astrocytic glutamine synthetase. Glia 2019; 67:2279-2293. [DOI: 10.1002/glia.23683] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 07/01/2019] [Accepted: 07/03/2019] [Indexed: 12/27/2022]
Affiliation(s)
- Sebastian Ivens
- Department of Psychiatry and Psychotherapy Charité‐Universitätsmedizin Berlin Berlin Germany
- Institute for Neurophysiology Charité‐Universitätsmedizin Berlin Berlin Germany
| | - Gürsel Çalışkan
- Institute for Neurophysiology Charité‐Universitätsmedizin Berlin Berlin Germany
- Institute of Biology Otto‐von‐Guericke‐University Magdeburg Magdeburg Germany
- Center for Behavioral Brain Sciences Magdeburg Germany
| | - Ismini Papageorgiou
- Institute of Physiology and Pathophysiology University of Heidelberg Heidelberg Germany
- Institute of Radiology Suedharz Hospital Nordhausen Nordhausen Germany
| | - Tiziana Cesetti
- Institute of Physiology and Pathophysiology University of Heidelberg Heidelberg Germany
- Institute of Molecular and Cell Biology University of Applied Sciences Mannheim Mannheim Germany
| | - Ansgar Malich
- Institute of Radiology Suedharz Hospital Nordhausen Nordhausen Germany
| | - Oliver Kann
- Institute of Physiology and Pathophysiology University of Heidelberg Heidelberg Germany
| | - Uwe Heinemann
- Institute for Neurophysiology Charité‐Universitätsmedizin Berlin Berlin Germany
| | - Oliver Stork
- Institute of Biology Otto‐von‐Guericke‐University Magdeburg Magdeburg Germany
- Center for Behavioral Brain Sciences Magdeburg Germany
| | - Anne Albrecht
- Institute of Biology Otto‐von‐Guericke‐University Magdeburg Magdeburg Germany
- Center for Behavioral Brain Sciences Magdeburg Germany
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Richter-Levin G, Stork O, Schmidt MV. Animal models of PTSD: a challenge to be met. Mol Psychiatry 2019; 24:1135-1156. [PMID: 30816289 PMCID: PMC6756084 DOI: 10.1038/s41380-018-0272-5] [Citation(s) in RCA: 117] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2017] [Revised: 08/13/2018] [Accepted: 09/11/2018] [Indexed: 02/07/2023]
Abstract
Recent years have seen increased interest in psychopathologies related to trauma exposure. Specifically, there has been a growing awareness to posttraumatic stress disorder (PTSD) in part due to terrorism, climate change-associated natural disasters, the global refugee crisis, and increased violence in overpopulated urban areas. However, notwithstanding the increased awareness to the disorder, the increasing number of patients, and the devastating impact on the lives of patients and their families, the efficacy of available treatments remains limited and highly unsatisfactory. A major scientific effort is therefore devoted to unravel the neural mechanisms underlying PTSD with the aim of paving the way to developing novel or improved treatment approaches and drugs to treat PTSD. One of the major scientific tools used to gain insight into understanding physiological and neuronal mechanisms underlying diseases and for treatment development is the use of animal models of human diseases. While much progress has been made using these models in understanding mechanisms of conditioned fear and fear memory, the gained knowledge has not yet led to better treatment options for PTSD patients. This poor translational outcome has already led some scientists and pharmaceutical companies, who do not in general hold opinions against animal models, to propose that those models should be abandoned. Here, we critically examine aspects of animal models of PTSD that may have contributed to the relative lack of translatability, including the focus on the exposure to trauma, overlooking individual and sex differences, and the contribution of risk factors. Based on findings from recent years, we propose research-based modifications that we believe are required in order to overcome some of the shortcomings of previous practice. These modifications include the usage of animal models of PTSD which incorporate risk factors and of the behavioral profiling analysis of individuals in a sample. These modifications are aimed to address factors such as individual predisposition and resilience, thus taking into consideration the fact that only a fraction of individuals exposed to trauma develop PTSD. We suggest that with an appropriate shift of practice, animal models are not only a valuable tool to enhance our understanding of fear and memory processes, but could serve as effective platforms for understanding PTSD, for PTSD drug development and drug testing.
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Affiliation(s)
- Gal Richter-Levin
- Sagol Department of Neurobiology, University of Haifa, Haifa, Israel. .,The Integrated Brain and Behavior Research Center (IBBR), University of Haifa, Haifa, Israel. .,Psychology Department, University of Haifa, Haifa, Israel.
| | - Oliver Stork
- 0000 0001 1018 4307grid.5807.aDepartment of Genetics & Molecular Neurobiology, Institute of Biology, Otto-von-Guericke-University Magdeburg, Leipziger Str. 44, 39120 Magdeburg, Germany ,grid.452320.2Center for Behavioral Brain Sciences, Universitätsplatz 2, 39106 Magdeburg, Germany
| | - Mathias V. Schmidt
- 0000 0000 9497 5095grid.419548.5Department of Stress Neurobiology and Neurogenetics, Max Planck Institute of Psychiatry, Munich, Germany
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Brydges NM, Moon A, Rule L, Watkin H, Thomas KL, Hall J. Sex specific effects of pre-pubertal stress on hippocampal neurogenesis and behaviour. Transl Psychiatry 2018; 8:271. [PMID: 30531788 PMCID: PMC6288078 DOI: 10.1038/s41398-018-0322-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 11/08/2018] [Accepted: 11/13/2018] [Indexed: 12/13/2022] Open
Abstract
Experience of traumatic events in childhood is linked to an elevated risk of developing psychiatric disorders in adulthood. The neurobiological mechanisms underlying this phenomenon are not fully understood. The limbic system, particularly the hippocampus, is significantly impacted by childhood trauma. In particular, it has been hypothesised that childhood stress may impact adult hippocampal neurogenesis (AHN) and related behaviours, conferring increased risk for later mental illness. Stress in utero can lead to impaired hippocampal synaptic plasticity, and stress in the first 2-3 weeks of life reduces AHN in animal models. Less is known about the effects of stress in the post-weaning, pre-pubertal phase, a developmental time-point more akin to human childhood. Therefore, we investigated persistent effects of pre-pubertal stress (PPS) on functional and molecular aspects of the hippocampus. AHN was altered following PPS in male rats only. Specifically males showed reduced production of new neurons following PPS, but increased survival in the ventral dentate gyrus. In adult males, but not females, pattern separation and trace fear conditioning, behaviours that rely heavily on AHN, were also impaired after PPS. PPS also increased the expression of parvalbumin-positive GABAergic interneurons in the ventral dentate gyrus and increased glutamic acid decarboxylase 67 expression in the ventral hilus, in males only. Our results demonstrate the lasting effects of PPS on the hippocampus in a sex- and time-dependent manner, provide a potential mechanistic link between PPS and later behavioural impairments, and highlight sex differences in vulnerability to neuropsychiatric conditions after early-life stress.
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Affiliation(s)
- Nichola Marie Brydges
- Neuroscience and Mental Health Research Institute, Cardiff University, Hadyn Ellis Building, Maindy Road, Cardiff, CF24 4HQ, UK.
| | - Anna Moon
- 0000 0001 0807 5670grid.5600.3Neuroscience and Mental Health Research Institute, Cardiff University, Hadyn Ellis Building, Maindy Road, Cardiff, CF24 4HQ UK
| | - Lowenna Rule
- 0000 0001 0807 5670grid.5600.3Neuroscience and Mental Health Research Institute, Cardiff University, Hadyn Ellis Building, Maindy Road, Cardiff, CF24 4HQ UK
| | - Holly Watkin
- 0000 0001 0807 5670grid.5600.3Neuroscience and Mental Health Research Institute, Cardiff University, Hadyn Ellis Building, Maindy Road, Cardiff, CF24 4HQ UK
| | - Kerrie L. Thomas
- 0000 0001 0807 5670grid.5600.3Neuroscience and Mental Health Research Institute, Cardiff University, Hadyn Ellis Building, Maindy Road, Cardiff, CF24 4HQ UK ,0000 0001 0807 5670grid.5600.3School of Biosciences, Cardiff University, Museum Avenue, Cardiff, CF10 3AX UK
| | - Jeremy Hall
- 0000 0001 0807 5670grid.5600.3Neuroscience and Mental Health Research Institute, Cardiff University, Hadyn Ellis Building, Maindy Road, Cardiff, CF24 4HQ UK ,0000 0001 0807 5670grid.5600.3MRC Centre for Neuropsychiatric Genetics and Genomics, Cardiff University, Hadyn Ellis Building, Maindy Road, Cardiff, CF24 4HQ UK
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Adolescent conditioning affects rate of adult fear, safety and reward learning during discriminative conditioning. Sci Rep 2018; 8:17315. [PMID: 30470766 PMCID: PMC6251908 DOI: 10.1038/s41598-018-35678-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 11/08/2018] [Indexed: 12/21/2022] Open
Abstract
Fear and reward memories formed in adulthood are influenced by prior experiences. Experiences that occur during sensitive periods, such as adolescence, can have an especially high impact on later learning. Fear and reward memories form when aversive or appetitive events co-occur with initially neutral stimuli, that then gain negative or positive emotional load. Fear and reward seeking behaviours are influenced by safety cues, signalling the non-occurrence of a threat. It is unclear how adolescent fear or reward pre-conditioning influences later dynamics of these conditioned emotions, and conditioned safety. In this study, we presented male rats with adolescent fear or reward pre-conditioning, followed by discriminative conditioning in adulthood. In this discriminative task, rats are simultaneously conditioned to reward, fear and safety cues. We show that adolescent reward pre-conditioning did not affect the rate of adult reward conditioning, but instead accelerated adult safety conditioning. Adolescent fear pre-conditioning accelerated adult fear and reward seeking behaviours but delayed adult safety expression. Together, our results suggest that the dynamics of safety conditioning can be influenced by adolescent priming of different valences. Taking adolescent experiences into consideration can have implications on how we approach therapy options for later learned fear disorders where safety learning is compromised.
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32
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Animals, anxiety, and anxiety disorders: How to measure anxiety in rodents and why. Behav Brain Res 2018; 352:81-93. [DOI: 10.1016/j.bbr.2017.10.016] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 10/12/2017] [Accepted: 10/14/2017] [Indexed: 12/31/2022]
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Stylianakis AA, Harmon-Jones SK, Richardson R, Baker KD. Differences in the persistence of spatial memory deficits induced by a chronic stressor in adolescents compared to juveniles. Dev Psychobiol 2018; 60:805-813. [PMID: 29943435 DOI: 10.1002/dev.21750] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 05/07/2018] [Accepted: 05/23/2018] [Indexed: 12/14/2022]
Abstract
Adolescence is thought of as a stress-sensitive developmental period. While many studies have compared adolescent responses to stress relative to that of adults, a growing body of work has examined stress responses in juveniles. Here we investigated if a chronic stressor has a differential effect on spatial memory in rats depending on whether it occurs during adolescence or the juvenile period. Male rats were exposed to the stress hormone corticosterone (Cort) in their drinking water, a vehicle control (2.5% ethanol), or water, for 7 days before being tested on a novel Object/Place task 6 days or 6 weeks later. Exposure to Cort or ethanol at either age impaired spatial memory at the 6-day test. The ethanol induced impairment was attenuated 6 weeks later. However, rats given Cort during adolescence, but not the juvenile period, were still impaired. Together, these results suggest that adolescence is indeed a stress-sensitive period.
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Affiliation(s)
| | | | - Rick Richardson
- School of Psychology, UNSW Sydney, Sydney, New South Wales, Australia
| | - Kathryn D Baker
- School of Psychology, UNSW Sydney, Sydney, New South Wales, Australia
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34
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Hodges TE, Baumbach JL, McCormick CM. Predictors of social instability stress effects on social interaction and anxiety in adolescent male rats. Dev Psychobiol 2018; 60:651-663. [DOI: 10.1002/dev.21626] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Accepted: 02/02/2018] [Indexed: 12/25/2022]
Affiliation(s)
| | | | - Cheryl M. McCormick
- Department of Psychology; Brock University; Ontario Canada
- Centre for Neuroscience; Brock University; Ontario Canada
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35
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Early-life and pubertal stress differentially modulate grey matter development in human adolescents. Sci Rep 2018; 8:9201. [PMID: 29907813 PMCID: PMC6003940 DOI: 10.1038/s41598-018-27439-5] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 05/30/2018] [Indexed: 12/23/2022] Open
Abstract
Animal and human studies have shown that both early-life traumatic events and ongoing stress episodes affect neurodevelopment, however, it remains unclear whether and how they modulate normative adolescent neuro-maturational trajectories. We characterized effects of early-life (age 0-5) and ongoing stressors (age 14-17) on longitudinal changes (age 14 to17) in grey matter volume (GMV) of healthy adolescents (n = 37). Timing and stressor type were related to differential GMV changes. More personal early-life stressful events were associated with larger developmental reductions in GMV over anterior prefrontal cortex, amygdala and other subcortical regions; whereas ongoing stress from the adolescents' social environment was related to smaller reductions over the orbitofrontal and anterior cingulate cortex. These findings suggest that early-life stress accelerates pubertal development, whereas an adverse adolescent social environment disturbs brain maturation with potential mental health implications: delayed anterior cingulate maturation was associated with more antisocial traits - a juvenile precursor of psychopathy.
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36
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Reid MW, Cooper DB, Lu LH, Iverson GL, Kennedy JE. Adversity and Resilience Are Associated with Outcome after Mild Traumatic Brain Injury in Military Service Members. J Neurotrauma 2018; 35:1146-1155. [PMID: 29357779 DOI: 10.1089/neu.2017.5424] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
The objective of this study was to assess the associations between resilience, adversity, post-concussion symptoms, and post-traumatic stress symptom reporting after mild traumatic brain injury (mTBI). We hypothesized that resilience would be associated with less symptom reporting, and adversity would be associated with greater symptom reporting. This was a cross-sectional study of retrospective data collected for an ongoing TBI repository. United States military service members who screened positive for mTBI during a primary care visit completed the Trauma History Screen (THS), Connor-Davidson Resilience Scale (CD-RISC), Neurobehavioral Symptom Inventory (NSI), and post-traumatic stress disorder (PTSD) Checklist-Civilian Version (PCL-C). Data collected from February 2015 to August 2016 were used for the present study. Only participants with complete data for the above measures were included, yielding a sample size of 165 participants. Adversity (THS) and resilience (CD-RISC) scores were each correlated significantly with post-concussion (NSI) and traumatic stress (PCL-C) total and subscale scores in the hypothesized direction. Interactions between adversity and resilience were absent for all measures except the NSI sensory subscale. Four traumatic event types were significantly associated positively with most NSI and PCL-C total and subscale scores, but the age at which traumatic events were first experienced showed few and mixed significant associations. In conclusion, resilience and adversity were significantly associated with symptom endorsement after mTBI. Screening for cumulative adversity may identify individuals at greater risk of developing persistent post-concussion symptoms and/or PTSD, and interventions that increase resilience may reduce symptom severity.
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Affiliation(s)
- Matthew W Reid
- 1 The Defense and Veterans Brain Injury Center, San Antonio Military Medical Center , San Antonio, Texas; Neurology Clinic, JBSA Ft. Sam Houston, Texas
| | - Douglas B Cooper
- 2 Defense and Veterans Brain Injury Center, San Antonio Polytrauma Rehabilitation Center, South Texas Veterans Health Care System, Department of Psychiatry, University of Texas Health Science Center San Antonio, San Antonio, Texas
| | - Lisa H Lu
- 1 The Defense and Veterans Brain Injury Center, San Antonio Military Medical Center , San Antonio, Texas; Neurology Clinic, JBSA Ft. Sam Houston, Texas
| | - Grant L Iverson
- 3 Department of Physical Medicine and Rehabilitation, Harvard Medical School; Spaulding Rehabilitation Hospital; and Home Base, A Red Sox Foundation and Massachusetts General Hospital Program , Boston, Massachusetts
| | - Jan E Kennedy
- 1 The Defense and Veterans Brain Injury Center, San Antonio Military Medical Center , San Antonio, Texas; Neurology Clinic, JBSA Ft. Sam Houston, Texas
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Saha R, Kriebel M, Volkmer H, Richter-Levin G, Albrecht A. Neurofascin Knock Down in the Basolateral Amygdala Mediates Resilience of Memory and Plasticity in the Dorsal Dentate Gyrus Under Stress. Mol Neurobiol 2018; 55:7317-7326. [DOI: 10.1007/s12035-018-0930-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Accepted: 01/24/2018] [Indexed: 11/24/2022]
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Lindgren M, Mäntylä T, Rikandi E, Torniainen-Holm M, Morales-Muñoz I, Kieseppä T, Mantere O, Suvisaari J. Childhood adversities and clinical symptomatology in first-episode psychosis. Psychiatry Res 2017; 258:374-381. [PMID: 28867407 DOI: 10.1016/j.psychres.2017.08.070] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 08/22/2017] [Accepted: 08/25/2017] [Indexed: 11/28/2022]
Abstract
In addition to severe traumatic experiences, milder, more common childhood adversities reflecting psychosocial burden may also be common in people with psychotic disorders and have an effect on symptomatology and functioning. We explored eleven negative childhood experiences and their influence on clinical symptoms among young adults with first-episode psychosis (FEP, n = 75) and matched population controls (n = 51). Individuals with FEP reported more adversities than controls. Specifically serious conflicts within the family, bullying at school, maternal mental health problems, and one's own and parents' serious illness during childhood were experienced by the patients more often than by controls. In the FEP group, the severity of adversity was associated with increased anxiety, manic, and obsessive-compulsive symptoms, but not with the severity of positive psychotic symptoms. Adversity produced a more pronounced effect on symptoms in male patients than in female patients. To conclude, in line with earlier studies of more chronic psychosis, a majority of the participants with FEP reported exposure to childhood adversities, with the FEP group reporting more adversities than controls. High levels of mood and anxiety symptoms in patients with FEP may be related to cumulative exposure to childhood adversities. This should be taken into account in the treatment for FEP.
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Affiliation(s)
- Maija Lindgren
- Mental Health Unit, National Institute for Health and Welfare, Helsinki, Finland.
| | - Teemu Mäntylä
- Mental Health Unit, National Institute for Health and Welfare, Helsinki, Finland
| | - Eva Rikandi
- Mental Health Unit, National Institute for Health and Welfare, Helsinki, Finland; Department of Psychology and Logopedics, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Minna Torniainen-Holm
- Mental Health Unit, National Institute for Health and Welfare, Helsinki, Finland; Institute for Molecular Medicine Finland FIMM, University of Helsinki, Helsinki, Finland
| | - Isabel Morales-Muñoz
- Mental Health Unit, National Institute for Health and Welfare, Helsinki, Finland
| | - Tuula Kieseppä
- Mental Health Unit, National Institute for Health and Welfare, Helsinki, Finland; Department of Psychiatry, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Outi Mantere
- Mental Health Unit, National Institute for Health and Welfare, Helsinki, Finland; Department of Psychiatry, McGill University, Montréal, QC, Canada; Bipolar Disorders Clinic, Douglas Mental Health University Institute, Montréal, QC, Canada
| | - Jaana Suvisaari
- Mental Health Unit, National Institute for Health and Welfare, Helsinki, Finland
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Shavit Stein E, Itsekson Hayosh Z, Vlachos A, Maggio N. Stress and Corticosteroids Modulate Muscarinic Long Term Potentiation (mLTP) in the Hippocampus. Front Cell Neurosci 2017; 11:299. [PMID: 29033789 PMCID: PMC5627013 DOI: 10.3389/fncel.2017.00299] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Accepted: 09/08/2017] [Indexed: 12/16/2022] Open
Abstract
Stress influences synaptic plasticity, learning and memory in a steroid hormone receptor dependent manner. Based on these findings it has been proposed that stress could be a major risk factor for the development of cognitive decline and dementia. Interestingly, evidence has been provided that stress also affects muscarinic, i.e., acetylcholine (ACh)-mediated neurotransmission. To learn more about the impact of stress and steroids on synaptic plasticity, in this study, we investigated the effects of stress on muscarinic long term potentiation (mLTP). We report that multiple, unpredictable exposure to stress depresses carbachol (0.5 μM)-induced mLTP, while this effect of stress is not observed in hippocampal slices prepared from mice exposed only to a single stressful procedure. Furthermore, we demonstrate that activation of distinct steroid hormone receptors is involved in stress-mediated alterations of mLTP. Activation of mineralocorticoid receptors (MR) promotes mLTP, while glucocorticoid receptor (GR) activity impairs mLTP. These effects of multiple unpredictable stress on mLTP are long-lasting since they are detected even two weeks after the last stressful experience. Thus, multiple unpredictable events rather than a single stressful experience affect mLTP in a steroid hormone receptor dependent manner, suggesting that chronic unpredictable stress can lead to lasting alterations in hippocampal cholinergic plasticity.
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Affiliation(s)
- Efrat Shavit Stein
- Department of Neurology, The Chaim Sheba Medical Center at Tel HashomerRamat Gan, Israel
| | - Ze'Ev Itsekson Hayosh
- Department of Neurology, The Chaim Sheba Medical Center at Tel HashomerRamat Gan, Israel
| | - Andreas Vlachos
- Department of Neuroanatomy, Institute of Anatomy and Cell Biology, Faculty of Medicine, University of FreiburgFreiburg, Germany
| | - Nicola Maggio
- Department of Neurology, The Chaim Sheba Medical Center at Tel HashomerRamat Gan, Israel.,Department of Neurology and Neurosurgery, Sackler School of Medicine, Tel Aviv UniversityTel Aviv, Israel.,Sagol School of Neuroscience, Tel Aviv UniversityTel Aviv, Israel.,Talpiot Medical Leadership Program, The Chaim Sheba Medical Center at Tel HashomerRamat Gan, Israel
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