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Tamura H, Miyazaki A, Kawamura T, Gotoh H, Yamamoto N, Narita M. Chronic ingestion of soy peptide supplementation reduces aggressive behavior and abnormal fear memory caused by juvenile social isolation. Sci Rep 2024; 14:11557. [PMID: 38773352 PMCID: PMC11109177 DOI: 10.1038/s41598-024-62534-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Accepted: 05/17/2024] [Indexed: 05/23/2024] Open
Abstract
Juvenile loneliness is a risk factor for psychopathology in later life. Deprivation of early social experience due to peer rejection has a detrimental impact on emotional and cognitive brain function in adulthood. Accumulating evidence indicates that soy peptides have many positive effects on higher brain function in rodents and humans. However, the effects of soy peptide use on juvenile social isolation are unknown. Here, we demonstrated that soy peptides reduced the deterioration of behavioral and cellular functions resulting from juvenile socially-isolated rearing. We found that prolonged social isolation post-weaning in male C57BL/6J mice resulted in higher aggression and impulsivity and fear memory deficits at 7 weeks of age, and that these behavioral abnormalities, except impulsivity, were mitigated by ingestion of soy peptides. Furthermore, we found that daily intake of soy peptides caused upregulation of postsynaptic density 95 in the medial prefrontal cortex and phosphorylation of the cyclic adenosine monophosphate response element binding protein in the hippocampus of socially isolated mice, increased phosphorylation of the adenosine monophosphate-activated protein kinase in the hippocampus, and altered the microbiota composition. These results suggest that soy peptides have protective effects against juvenile social isolation-induced behavioral deficits via synaptic maturation and cellular functionalization.
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Affiliation(s)
- Hideki Tamura
- Laboratory of Biofunctional Science, School of Pharmacy and Pharmaceutical Sciences, Hoshi University, 2-4-41 Ebara, Shinagawa, Tokyo, 142-8501, Japan.
- Institute for Advanced Life Sciences, Hoshi University School of Pharmacy and Pharmaceutical Sciences, Tokyo, Japan.
| | - Akiko Miyazaki
- Department of Pharmacology, Hoshi University School of Pharmacy and Pharmaceutical Sciences, Tokyo, Japan
| | - Takashi Kawamura
- Department of Pharmacology, Hoshi University School of Pharmacy and Pharmaceutical Sciences, Tokyo, Japan
| | - Hikaru Gotoh
- Department of Pharmacology, Hoshi University School of Pharmacy and Pharmaceutical Sciences, Tokyo, Japan
| | - Naoki Yamamoto
- Department of Biology, Faculty of Science, Kyushu University, Fukuoka, 819-0395, Japan
| | - Minoru Narita
- Institute for Advanced Life Sciences, Hoshi University School of Pharmacy and Pharmaceutical Sciences, Tokyo, Japan
- Department of Pharmacology, Hoshi University School of Pharmacy and Pharmaceutical Sciences, Tokyo, Japan
- Department of Pharmacy, National Cancer Center Hospital, Tokyo, Japan
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Mottarlini F, Rizzi B, Targa G, Buzzelli V, Di Trapano M, Rullo L, Candeletti S, Ciccocioppo R, Fattore L, Romualdi P, Fumagalli F, Trezza V, Caffino L. Communal nesting shapes the sex-dependent glutamatergic response to early life stress in the rat prefrontal cortex. Front Psychiatry 2024; 15:1406687. [PMID: 38835543 PMCID: PMC11148342 DOI: 10.3389/fpsyt.2024.1406687] [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: 03/25/2024] [Accepted: 05/07/2024] [Indexed: 06/06/2024] Open
Abstract
Introduction Early social environment, either positive or negative, shapes the adult brain. Communal nesting (CN), a naturalistic setting in which 2-3 females keep their pups in a single nest sharing care-giving behavior, provides high level of peer interaction for pups. Early social isolation (ESI) from dam and siblings represents, instead, an adverse condition providing no peer interaction. Methods We investigated whether CN (enrichment setting) might influence the response to ESI (impoverishment setting) in terms of social behavior and glutamate system in the medial prefrontal cortex (mPFC) of adult and adolescent male and female rats. Results Pinning (a rewarding component of social play behavior) was significantly more pronounced in males than in females exposed to the combination of CN and ESI. CN sensitized the glutamate synapse in the mPFC of ESI-exposed male, but not female, rats. Accordingly, we observed (i) a potentiation of the glutamatergic neurotransmission in the mPFC of both adolescent and adult males, as shown by the recruitment of NMDA receptor subunits together with increased expression/activation of PSD95, SynCAM 1, Synapsin I and αCaMKII; (ii) a de-recruiting of NMDA receptors from active synaptic zones of same-age females, together with reduced expression/activation of the above-mentioned proteins, which might reduce the glutamate transmission. Whether similar sex-dependent glutamate homeostasis modulation occurs in other brain areas remains to be elucidated. Discussion CN and ESI interact to shape social behavior and mPFC glutamate synapse homeostasis in an age- and sex-dependent fashion, suggesting that early-life social environment may play a crucial role in regulating the risk to develop psychopathology.
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Affiliation(s)
- Francesca Mottarlini
- Department of Pharmacological and Biomolecular Sciences 'Rodolfo Paoletti', Università degli Studi di Milano, Milan, Italy
| | - Beatrice Rizzi
- Department of Pharmacological and Biomolecular Sciences 'Rodolfo Paoletti', Università degli Studi di Milano, Milan, Italy
- Center for Neuroscience, University of Camerino, Camerino, Italy
| | - Giorgia Targa
- Department of Pharmacological and Biomolecular Sciences 'Rodolfo Paoletti', Università degli Studi di Milano, Milan, Italy
| | - Valeria Buzzelli
- Department of Science, Section of Biomedical Sciences and Technologies, Roma Tre University, Rome, Italy
| | - Melania Di Trapano
- Department of Science, Section of Biomedical Sciences and Technologies, Roma Tre University, Rome, Italy
| | - Laura Rullo
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Sanzio Candeletti
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Roberto Ciccocioppo
- School of Pharmacy, Center for Neuroscience, Pharmacology Unit, University of Camerino, Camerino, Italy
| | - Liana Fattore
- Research National Council (CNR) Institute of Neuroscience-Cagliari, National Research Council, Cagliari, Italy
| | - Patrizia Romualdi
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Fabio Fumagalli
- Department of Pharmacological and Biomolecular Sciences 'Rodolfo Paoletti', Università degli Studi di Milano, Milan, Italy
| | - Viviana Trezza
- Department of Science, Section of Biomedical Sciences and Technologies, Roma Tre University, Rome, Italy
- Neuroendocrinology, Metabolism and Neuropharmacology Unit, Istituto di Ricerca e Cura di Carattere Scientifico (IRCCS) Fondazione Santa Lucia, Rome, Italy
| | - Lucia Caffino
- Department of Pharmacological and Biomolecular Sciences 'Rodolfo Paoletti', Università degli Studi di Milano, Milan, Italy
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Lallai V, Congiu C, Craig G, Manca L, Chen YC, Dukes AJ, Fowler CD, Dazzi L. Social isolation postweaning alters reward-related dopamine dynamics in a region-specific manner in adolescent male rats. Neurobiol Stress 2024; 30:100620. [PMID: 38486879 PMCID: PMC10937317 DOI: 10.1016/j.ynstr.2024.100620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 01/15/2024] [Accepted: 03/01/2024] [Indexed: 03/17/2024] Open
Abstract
Early development is characterized by dynamic transitions in brain maturation, which may be impacted by environmental factors. Here, we sought to determine the effects of social isolation from postweaning and during adolescence on reward behavior and dopaminergic signaling in male rats. Subjects were socially isolated or group housed at postnatal day 21. Three weeks later, extracellular dopamine concentrations were examined in the medial prefrontal cortex (mPFC) and nucleus accumbens shell (NAc) during a feeding bout. Surprisingly, opposing effects were found in which increased mPFC dopamine concentrations were observed in group housed, but not isolated, rats. In stark contrast, increased dopamine levels were found in the NAc of isolated, but not group housed, rats. Moreover, the absence of an effect in the mPFC of the isolated rats could not be reversed by subsequent group housing, demonstrating the remarkable long-term effects on dopamine signaling dynamics. When provided a highly palatable food, the isolated subjects exhibited a dramatic increase in mPFC dopamine levels when the chocolate was novel, but no effects following chronic chocolate consumption. In contrast, the group housed subjects showed significantly increased dopamine levels only with chronic chocolate consumption. The dopamine changes were correlated with differences in behavioral measures. Importantly, the deficit in reward-related behavior during isolation could be reversed by microinjection of either dopamine or cocaine into the mPFC. Together, these data provide evidence that social isolation from postweaning and during adolescence alters reward-induced dopamine levels in a brain region-specific manner, which has important functional implications for reward-related behavior.
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Affiliation(s)
- Valeria Lallai
- Department of Neurobiology and Behavior, University of California Irvine, Irvine, CA, 92697, USA
- Department of Life and Environmental Sciences, Section of Neuroscience and Anthropology, Centre of Excellence for the Neurobiology of Dependence, University of Cagliari, 09042, Monserrato, CA, Italy
| | - Cristina Congiu
- Department of Neurobiology and Behavior, University of California Irvine, Irvine, CA, 92697, USA
- Department of Life and Environmental Sciences, Section of Neuroscience and Anthropology, Centre of Excellence for the Neurobiology of Dependence, University of Cagliari, 09042, Monserrato, CA, Italy
| | - Giulia Craig
- Department of Neurobiology and Behavior, University of California Irvine, Irvine, CA, 92697, USA
- Department of Life and Environmental Sciences, Section of Neuroscience and Anthropology, Centre of Excellence for the Neurobiology of Dependence, University of Cagliari, 09042, Monserrato, CA, Italy
| | - Letizia Manca
- Department of Neurobiology and Behavior, University of California Irvine, Irvine, CA, 92697, USA
- Department of Life and Environmental Sciences, Section of Neuroscience and Anthropology, Centre of Excellence for the Neurobiology of Dependence, University of Cagliari, 09042, Monserrato, CA, Italy
| | - Yen-Chu Chen
- Department of Neurobiology and Behavior, University of California Irvine, Irvine, CA, 92697, USA
| | - Angeline J. Dukes
- Department of Neurobiology and Behavior, University of California Irvine, Irvine, CA, 92697, USA
| | - Christie D. Fowler
- Department of Neurobiology and Behavior, University of California Irvine, Irvine, CA, 92697, USA
| | - Laura Dazzi
- Department of Life and Environmental Sciences, Section of Neuroscience and Anthropology, Centre of Excellence for the Neurobiology of Dependence, University of Cagliari, 09042, Monserrato, CA, Italy
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Dazzi L, Sanna F, Talani G, Bassareo V, Biggio F, Follesa P, Pisu MG, Porcu P, Puliga R, Quartu M, Serra M, Serra MP, Sanna E, Acquas E. Binge-like administration of alcohol mixed to energy drinks to male adolescent rats severely impacts on mesocortical dopaminergic function in adulthood: A behavioral, neurochemical and electrophysiological study. Neuropharmacology 2024; 243:109786. [PMID: 37952712 DOI: 10.1016/j.neuropharm.2023.109786] [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: 06/28/2023] [Revised: 10/27/2023] [Accepted: 10/27/2023] [Indexed: 11/14/2023]
Abstract
A growing body of evidence indicates that the practice of consuming alcohol mixed with energy drinks (ED) (AMED) in a binge drinking pattern is significantly diffusing among the adolescent population. This behavior, aimed at increasing the intake of alcohol, raises serious concerns about its long-term effects. Epidemiological studies suggest that AMED consumption might increase vulnerability to alcohol abuse and have a gating effect on the use of illicit drugs. The medial prefrontal cortex (mPFC) is involved in the modulation of the reinforcing effects of alcohol and of impulsive behavior and plays a key role in the development of addiction. In our study, we used a binge-like protocol of administration of alcohol, ED, or AMED in male adolescent rats, to mimic the binge-like intake behavior observed in humans, in order to evaluate whether these treatments could differentially affect the function of mesocortical dopaminergic neurons in adulthood. We did so by measuring: i) physiological sensorimotor gating; ii) voluntary alcohol consumption and dopamine transmission before, during, and after presentation of alcohol; iii) electrophysiological activity of VTA dopaminergic neurons and their sensitivity to a challenge with alcohol. Our results indicate that exposure to alcohol, ED, or AMED during adolescence induces differential adaptive changes in the function of mesocortical dopaminergic neurons and, in particular, that AMED exposure decreases their sensitivity to external stimuli, possibly laying the foundation for the altered behaviors observed in adulthood.
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Affiliation(s)
- Laura Dazzi
- Department of Life and Environmental Sciences, University of Cagliari, Cittadella Universitaria Monserrato, SS 554 - bivio per Sestu, 09042, Monserrato, Cagliari, Italy
| | - Fabrizio Sanna
- Department of Biomedical Sciences, University of Cagliari, Cittadella Universitaria Monserrato, SS 554 - bivio per Sestu, 09042, Monserrato, Cagliari, Italy
| | - Giuseppe Talani
- Institute of Neuroscience - National Research Council (C.N.R.) of Italy, Cagliari, Italy
| | - Valentina Bassareo
- Department of Biomedical Sciences, University of Cagliari, Cittadella Universitaria Monserrato, SS 554 - bivio per Sestu, 09042, Monserrato, Cagliari, Italy
| | - Francesca Biggio
- Department of Life and Environmental Sciences, University of Cagliari, Cittadella Universitaria Monserrato, SS 554 - bivio per Sestu, 09042, Monserrato, Cagliari, Italy
| | - Paolo Follesa
- Department of Life and Environmental Sciences, University of Cagliari, Cittadella Universitaria Monserrato, SS 554 - bivio per Sestu, 09042, Monserrato, Cagliari, Italy
| | - Maria Giuseppina Pisu
- Institute of Neuroscience - National Research Council (C.N.R.) of Italy, Cagliari, Italy
| | - Patrizia Porcu
- Institute of Neuroscience - National Research Council (C.N.R.) of Italy, Cagliari, Italy
| | - Roberta Puliga
- Department of Life and Environmental Sciences, University of Cagliari, Cittadella Universitaria Monserrato, SS 554 - bivio per Sestu, 09042, Monserrato, Cagliari, Italy
| | - Marina Quartu
- Department of Biomedical Sciences, University of Cagliari, Cittadella Universitaria Monserrato, SS 554 - bivio per Sestu, 09042, Monserrato, Cagliari, Italy
| | - Mariangela Serra
- Department of Life and Environmental Sciences, University of Cagliari, Cittadella Universitaria Monserrato, SS 554 - bivio per Sestu, 09042, Monserrato, Cagliari, Italy
| | - Maria Pina Serra
- Department of Biomedical Sciences, University of Cagliari, Cittadella Universitaria Monserrato, SS 554 - bivio per Sestu, 09042, Monserrato, Cagliari, Italy
| | - Enrico Sanna
- Department of Life and Environmental Sciences, University of Cagliari, Cittadella Universitaria Monserrato, SS 554 - bivio per Sestu, 09042, Monserrato, Cagliari, Italy; Institute of Neuroscience - National Research Council (C.N.R.) of Italy, Cagliari, Italy.
| | - Elio Acquas
- Department of Life and Environmental Sciences, University of Cagliari, Cittadella Universitaria Monserrato, SS 554 - bivio per Sestu, 09042, Monserrato, Cagliari, Italy
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Sagheddu C, Cancedda E, Bagheri F, Kalaba P, Muntoni AL, Lubec J, Lubec G, Sanna F, Pistis M. The Atypical Dopamine Transporter Inhibitor CE-158 Enhances Dopamine Neurotransmission in the Prefrontal Cortex of Male Rats: A Behavioral, Electrophysiological, and Microdialysis Study. Int J Neuropsychopharmacol 2023; 26:784-795. [PMID: 37725477 PMCID: PMC10674083 DOI: 10.1093/ijnp/pyad056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Accepted: 09/17/2023] [Indexed: 09/21/2023] Open
Abstract
BACKGROUND Dopamine plays a key role in several physiological functions such as motor control, learning and memory, and motivation and reward. The atypical dopamine transporter inhibitor S,S stereoisomer of 5-(((S)-((S)-(3-bromophenyl)(phenyl)methyl)sulfinyl)methyl)thiazole (CE-158) has been recently reported to promote behavioral flexibility and restore learning and memory in aged rats. METHODS Adult male rats were i.p. administered for 1 or 10 days with CE-158 at the dose of 1 or 10 mg/kg and tested for extracellular dopamine in the medial prefrontal cortex by means of intracerebral microdialysis and single unit cell recording in the same brain area. Moreover, the effects of acute and chronic CE-158 on exploratory behavior, locomotor activity, prepulse inhibition, working memory, and behavioral flexibility were also investigated. RESULTS CE-158 dose-dependently potentiated dopamine neurotransmission in the medial prefrontal cortex as assessed by intracerebral microdialysis. Moreover, repeated exposure to CE-158 at 1 mg/kg was sufficient to increase the number of active pyramidal neurons and their firing frequency in the same brain area. In addition, CE-158 at the dose of 10 mg/kg stimulates exploratory behavior to the same extent after acute or chronic treatment. Noteworthy, the chronic treatment at both doses did not induce any behavioral alterations suggestive of abuse potential (e.g., motor behavioral sensitization) or pro-psychotic-like effects such as disruption of sensorimotor gating or impairments in working memory and behavioral flexibility as measured by prepulse inhibition and Y maze. CONCLUSIONS Altogether, these findings confirm CE-158 as a promising pro-cognitive agent and contribute to assessing its preclinical safety profile in a chronic administration regimen for further translational testing.
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Affiliation(s)
- Claudia Sagheddu
- Department of Biomedical Sciences, Division of Neuroscience and Clinical Pharmacology, University of Cagliari, Cittadella Universitaria di Monserrato, Monserrato, Cagliari, Italy
| | - Enzo Cancedda
- Department of Biomedical Sciences, Division of Neuroscience and Clinical Pharmacology, University of Cagliari, Cittadella Universitaria di Monserrato, Monserrato, Cagliari, Italy
| | - Farshid Bagheri
- Department of Biomedical Sciences, Division of Neuroscience and Clinical Pharmacology, University of Cagliari, Cittadella Universitaria di Monserrato, Monserrato, Cagliari, Italy
| | - Predrag Kalaba
- Department of Pharmaceutical Sciences, Division of Pharmaceutical Chemistry, Faculty of Life Sciences, University of Vienna, Vienna, Austria
| | - Anna Lisa Muntoni
- Neuroscience Institute, Section of Cagliari, National Research Council of Italy, Cittadella Universitaria di Monserrato, Monserrato, Cagliari, Italy
| | - Jana Lubec
- Programme for Proteomics, Paracelsus Medical University, Salzburg, Austria
| | - Gert Lubec
- Programme for Proteomics, Paracelsus Medical University, Salzburg, Austria
| | - Fabrizio Sanna
- Department of Biomedical Sciences, Division of Neuroscience and Clinical Pharmacology, University of Cagliari, Cittadella Universitaria di Monserrato, Monserrato, Cagliari, Italy
| | - Marco Pistis
- Department of Biomedical Sciences, Division of Neuroscience and Clinical Pharmacology, University of Cagliari, Cittadella Universitaria di Monserrato, Monserrato, Cagliari, Italy
- Neuroscience Institute, Section of Cagliari, National Research Council of Italy, Cittadella Universitaria di Monserrato, Monserrato, Cagliari, Italy
- Unit of Clinical Pharmacology, University Hospital, Cagliari, Italy
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Powell SB, Swerdlow NR. The Relevance of Animal Models of Social Isolation and Social Motivation for Understanding Schizophrenia: Review and Future Directions. Schizophr Bull 2023; 49:1112-1126. [PMID: 37527471 PMCID: PMC10483472 DOI: 10.1093/schbul/sbad098] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 08/03/2023]
Abstract
BACKGROUND AND HYPOTHESES Social dysfunction in schizophrenia includes symptoms of withdrawal and deficits in social skills, social cognition, and social motivation. Based on the course of illness, with social withdrawal occurring prior to psychosis onset, it is likely that the severity of social withdrawal/isolation contributes to schizophrenia neuropathology. STUDY DESIGN We review the current literature on social isolation in rodent models and provide a conceptual framework for its relationship to social withdrawal and neural circuit dysfunction in schizophrenia. We next review preclinical tasks of social behavior used in schizophrenia-relevant models and discuss strengths and limitations of existing approaches. Lastly, we consider new effort-based tasks of social motivation and their potential for translational studies in schizophrenia. STUDY RESULTS Social isolation rearing in rats produces profound differences in behavior, pharmacologic sensitivity, and neurochemistry compared to socially reared rats. Rodent models relevant to schizophrenia exhibit deficits in social behavior as measured by social interaction and social preference tests. Newer tasks of effort-based social motivation are being developed in rodents to better model social motivation deficits in neuropsychiatric disorders. CONCLUSIONS While experimenter-imposed social isolation provides a viable experimental model for understanding some biological mechanisms linking social dysfunction to clinical and neural pathology in schizophrenia, it bypasses critical antecedents to social isolation in schizophrenia, notably deficits in social reward and social motivation. Recent efforts at modeling social motivation using effort-based tasks in rodents have the potential to quantify these antecedents, identify models (eg, developmental, genetic) that produce deficits, and advance pharmacological treatments for social motivation.
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Affiliation(s)
- Susan B Powell
- Research Service, VA San Diego Healthcare System, La Jolla, CA, USA
- Department of Psychiatry, University of California San Diego, La Jolla, CA, USA
- Veterans Affairs VISN22 Mental Illness Research, Education and Clinical Center, La Jolla, CA, USA
| | - Neal R Swerdlow
- Research Service, VA San Diego Healthcare System, La Jolla, CA, USA
- Department of Psychiatry, University of California San Diego, La Jolla, CA, USA
- Veterans Affairs VISN22 Mental Illness Research, Education and Clinical Center, La Jolla, CA, USA
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Hu YY, Ding XS, Yang G, Liang XS, Feng L, Sun YY, Chen R, Ma QH. Analysis of the influences of social isolation on cognition and the therapeutic potential of deep brain stimulation in a mouse model. Front Psychiatry 2023; 14:1186073. [PMID: 37409161 PMCID: PMC10318365 DOI: 10.3389/fpsyt.2023.1186073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Accepted: 05/31/2023] [Indexed: 07/07/2023] Open
Abstract
Background Social interaction is a fundamental human need. Social isolation (SI) can have negative effects on both emotional and cognitive function. However, it is currently unclear how age and the duration of SI affect emotion and recognition function. In addition, there is no specific treatment for the effects of SI. Methods The adolescence or adult mice were individually housed in cages for 1, 6 or 12 months and for 2 months to estabolish SI mouse model. We investigated the effects of SI on behavior in mice at different ages and under distinct durations of SI, and we explored the possible underlying mechanisms. Then we performed deep brain stimulation (DBS) to evaluate its influences on SI induced behavioral abnormalities. Results We found that social recognition was affected in the short term, while social preference was damaged by extremely long periods of SI. In addition to affecting social memory, SI also affects emotion, short-term spatial ability and learning willingness in mice. Myelin was decreased significantly in the medial prefrontal cortex (mPFC) and dorsal hippocampus of socially isolated mice. Cellular activity in response to social stimulation in both areas was impaired by social isolation. By stimulating the mPFC using DBS, we found that DBS alleviated cellular activation disorders in the mPFC after long-term SI and improved social preference in mice. Conclusion Our results suggest that the therapeutic potential of stimulating the mPFC with DBS in individuals with social preference deficits caused by long-term social isolation, as well as the effects of DBS on the cellular activity and density of OPCs.
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Affiliation(s)
- Yun-Yun Hu
- Department of Neurology and Clinical Research Center of Neurological Disease, The Second Affiliated Hospital of Soochow University, Suzhou, China
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, China
- Department of Respiratory Medicine, Sleep Center, The Second Affiliated Hospital of Soochow University, Soochow University, Suzhou, China
| | - Xuan-Si Ding
- Department of Neurology and Clinical Research Center of Neurological Disease, The Second Affiliated Hospital of Soochow University, Suzhou, China
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, China
| | - Gang Yang
- Lab Center, Medical College of Soochow University, Suzhou, China
| | - Xue-Song Liang
- Department of Neurology and Clinical Research Center of Neurological Disease, The Second Affiliated Hospital of Soochow University, Suzhou, China
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, China
- Second Clinical College, Dalian Medical University, Dalian, China
| | - Lei Feng
- Monash Suzhou Research Institute, Suzhou, China
| | - Yan-Yun Sun
- Department of Neurology and Clinical Research Center of Neurological Disease, The Second Affiliated Hospital of Soochow University, Suzhou, China
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, China
| | - Rui Chen
- Department of Neurology and Clinical Research Center of Neurological Disease, The Second Affiliated Hospital of Soochow University, Suzhou, China
- Department of Respiratory Medicine, Sleep Center, The Second Affiliated Hospital of Soochow University, Soochow University, Suzhou, China
| | - Quan-Hong Ma
- Department of Neurology and Clinical Research Center of Neurological Disease, The Second Affiliated Hospital of Soochow University, Suzhou, China
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, China
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Xiong Y, Hong H, Liu C, Zhang YQ. Social isolation and the brain: effects and mechanisms. Mol Psychiatry 2023; 28:191-201. [PMID: 36434053 PMCID: PMC9702717 DOI: 10.1038/s41380-022-01835-w] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 10/05/2022] [Accepted: 10/10/2022] [Indexed: 11/26/2022]
Abstract
An obvious consequence of the coronavirus disease (COVID-19) pandemic is the worldwide reduction in social interaction, which is associated with many adverse effects on health in humans from babies to adults. Although social development under normal or isolated environments has been studied since the 1940s, the mechanism underlying social isolation (SI)-induced brain dysfunction remains poorly understood, possibly due to the complexity of SI in humans and translational gaps in findings from animal models. Herein, we present a systematic review that focused on brain changes at the molecular, cellular, structural and functional levels induced by SI at different ages and in different animal models. SI studies in humans and animal models revealed common socioemotional and cognitive deficits caused by SI in early life and an increased occurrence of depression and anxiety induced by SI during later stages of life. Altered neurotransmission and neural circuitry as well as abnormal development and function of glial cells in specific brain regions may contribute to the abnormal emotions and behaviors induced by SI. We highlight distinct alterations in oligodendrocyte progenitor cell differentiation and oligodendrocyte maturation caused by SI in early life and later stages of life, respectively, which may affect neural circuit formation and function and result in diverse brain dysfunctions. To further bridge animal and human SI studies, we propose alternative animal models with brain structures and complex social behaviors similar to those of humans.
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Affiliation(s)
- Ying Xiong
- grid.9227.e0000000119573309State Key Laboratory of Molecular and Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101 China
| | - Huilin Hong
- grid.9227.e0000000119573309State Key Laboratory of Molecular and Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101 China
| | - Cirong Liu
- grid.9227.e0000000119573309Institute of Neuroscience, Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai, 200031 China ,grid.511008.dShanghai Center for Brain Science and Brain-Inspired Intelligence Technology, Shanghai, 201210 China
| | - Yong Q. Zhang
- grid.9227.e0000000119573309State Key Laboratory of Molecular and Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101 China ,grid.410726.60000 0004 1797 8419University of the Chinese Academy of Sciences, Beijing, 100101 China
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Sinha AS, Wang T, Watanabe M, Hosoi Y, Sohara E, Akita T, Uchida S, Fukuda A. WNK3 kinase maintains neuronal excitability by reducing inwardly rectifying K+ conductance in layer V pyramidal neurons of mouse medial prefrontal cortex. Front Mol Neurosci 2022; 15:856262. [PMID: 36311015 PMCID: PMC9613442 DOI: 10.3389/fnmol.2022.856262] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 09/22/2022] [Indexed: 11/13/2022] Open
Abstract
The with-no-lysine (WNK) family of serine-threonine kinases and its downstream kinases of STE20/SPS1-related proline/alanine-rich kinase (SPAK) and oxidative stress-responsive kinase-1 (OSR1) may regulate intracellular Cl− homeostasis through phosphorylation of cation-Cl− co-transporters. WNK3 is expressed in fetal and postnatal brains, and its expression level increases during development. Its roles in neurons, however, remain uncertain. Using WNK3 knockout (KO) mice, we investigated the role of WNK3 in the regulation of the intracellular Cl− concentration ([Cl−]i) and the excitability of layer V pyramidal neurons in the medial prefrontal cortex (mPFC). Gramicidin-perforated patch-clamp recordings in neurons from acute slice preparation at the postnatal day 21 indicated a significantly depolarized reversal potential for GABAA receptor-mediated currents by 6 mV, corresponding to the higher [Cl−]i level by ~4 mM in KO mice than in wild-type littermates. However, phosphorylation levels of SPAK and OSR1 and those of neuronal Na+-K+-2Cl− co-transporter NKCC1 and K+-Cl− co-transporter KCC2 did not significantly differ between KO and wild-type mice. Meanwhile, the resting membrane potential of neurons was more hyperpolarized by 7 mV, and the minimum stimulus current necessary for firing induction was increased in KO mice. These were due to an increased inwardly rectifying K+ (IRK) conductance, mediated by classical inwardly rectifying (Kir) channels, in KO neurons. The introduction of an active form of WNK3 into the recording neurons reversed these changes. The potential role of KCC2 function in the observed changes of KO neurons was investigated by applying a selective KCC2 activator, CLP290. This reversed the enhanced IRK conductance in KO neurons, indicating that both WNK3 and KCC2 are intimately linked in the regulation of resting K+ conductance. Evaluation of synaptic properties revealed that the frequency of miniature excitatory postsynaptic currents (mEPSCs) was reduced, whereas that of inhibitory currents (mIPSCs) was slightly increased in KO neurons. Together, the impact of these developmental changes on the membrane and synaptic properties was manifested as behavioral deficits in pre-pulse inhibition, a measure of sensorimotor gating involving multiple brain regions including the mPFC, in KO mice. Thus, the basal function of WNK3 would be the maintenance and/or development of both intrinsic and synaptic excitabilities.
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Affiliation(s)
- Adya Saran Sinha
- Department of Neurophysiology, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Tianying Wang
- Department of Neurophysiology, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Miho Watanabe
- Department of Neurophysiology, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Yasushi Hosoi
- Department of Neurophysiology, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Eisei Sohara
- Department of Nephrology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Tenpei Akita
- Department of Neurophysiology, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Shinichi Uchida
- Department of Nephrology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Atsuo Fukuda
- Department of Neurophysiology, Hamamatsu University School of Medicine, Hamamatsu, Japan
- *Correspondence: Atsuo Fukuda
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10
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Takahashi A. The role of social isolation stress in escalated aggression in rodent models. Neurosci Res 2022:S0168-0102(22)00212-7. [PMID: 35917930 DOI: 10.1016/j.neures.2022.07.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 07/28/2022] [Indexed: 11/26/2022]
Abstract
Anti-social behavior and violence are major public health concerns. Globally, violence contributes to more than 1.6 million deaths each year. Previous studies have reported that social rejection or neglect exacerbates aggression. In rodent models, social isolation stress is used to demonstrate the adverse effects of social deprivation on physiological, endocrinological, immunological, and behavioral parameters, including aggressive behavior. This review summarizes recent rodent studies on the effect of social isolation stress during different developmental periods on aggressive behavior and the underlying neural mechanisms. Social isolation during adulthood affects the levels of neurosteroids and neuropeptides and increases aggressive behavior. These changes are ethologically relevant for the adaptation to changes in local environmental conditions in the natural habitats. Chronic deprivation of social interaction after weaning, especially during the juvenile to adolescent periods, leads to the disruption of the development of appropriate social behavior and the maladaptive escalation of aggressive behavior. The understanding of neurobiological mechanisms underlying social isolation-induced escalated aggression will aid in the development of therapeutic interventions for escalated aggression.
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Affiliation(s)
- Aki Takahashi
- Laboratory of Behavioral Neurobiology, Faculty of Human Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan.
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11
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Garcia-Partida JA, Torres-Sanchez S, MacDowell K, Fernández-Ponce MT, Casas L, Mantell C, Soto-Montenegro ML, Romero-Miguel D, Lamanna-Rama N, Leza JC, Desco M, Berrocoso E. The effects of mango leaf extract during adolescence and adulthood in a rat model of schizophrenia. Front Pharmacol 2022; 13:886514. [PMID: 35959428 PMCID: PMC9360613 DOI: 10.3389/fphar.2022.886514] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 06/30/2022] [Indexed: 11/13/2022] Open
Abstract
There is evidence that in schizophrenia, imbalances in inflammatory and oxidative processes occur during pregnancy and in the early postnatal period, generating interest in the potential therapeutic efficacy of anti-inflammatory and antioxidant compounds. Mangiferin is a polyphenolic compound abundant in the leaves of Mangifera indica L. that has robust antioxidant and anti-inflammatory properties, making it a potential candidate for preventive or co-adjuvant therapy in schizophrenia. Hence, this study set-out to evaluate the effect of mango leaf extract (MLE) in a model of schizophrenia based on maternal immune activation, in which Poly I:C (4 mg/kg) is administered intravenously to pregnant rats. Young adult (postnatal day 60–70) or adolescent (postnatal day 35–49) male offspring received MLE (50 mg/kg of mangiferin) daily, and the effects of MLE in adolescence were compared to those of risperidone, assessing behavior, brain magnetic resonance imaging (MRI), and oxidative/inflammatory and antioxidant mediators in the adult offspring. MLE treatment in adulthood reversed the deficit in prepulse inhibition (PPI) but it failed to attenuate the sensitivity to amphetamine and the deficit in novel object recognition (NOR) induced. By contrast, adolescent MLE treatment prevented the sensorimotor gating deficit in the PPI test, producing an effect similar to that of risperidone. This MLE treatment also produced a reduction in grooming behavior, but it had no effect on anxiety or novel object recognition memory. MRI studies revealed that adolescent MLE administration partially counteracted the cortical shrinkage, and cerebellum and ventricle enlargement. In addition, MLE administration in adolescence reduced iNOS mediated inflammatory activation and it promoted the expression of biomarkers of compensatory antioxidant activity in the prefrontal cortex and hippocampus, as witnessed through the reduction of Keap1 and the accumulation of NRF2 and HO1. Together, these findings suggest that MLE might be an alternative therapeutic or preventive add-on strategy to improve the clinical expression of schizophrenia in adulthood, while also modifying the time course of this disease at earlier stages in populations at high-risk.
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Affiliation(s)
- Jose Antonio Garcia-Partida
- Neuropsychopharmacology and Psychobiology Research Group, Department of Neuroscience, University of Cádiz, Cádiz, Spain
- Instituto de Investigación e Innovación en Ciencias Biomédicas de Cádiz, INiBICA, Hospital Universitario Puerta del Mar, Cádiz, Spain
| | - Sonia Torres-Sanchez
- Instituto de Investigación e Innovación en Ciencias Biomédicas de Cádiz, INiBICA, Hospital Universitario Puerta del Mar, Cádiz, Spain
- Neuropsychopharmacology and Psychobiology Research Group, Psychobiology Area, Department of Psychology, University of Cádiz, Cádiz, Spain
- Ciber of Mental Health (CIBERSAM), ISCIII, Madrid, Spain
| | - Karina MacDowell
- Ciber of Mental Health (CIBERSAM), ISCIII, Madrid, Spain
- Department of Pharmacology and Toxicology, Faculty of Medicine, Universidad Complutense de Madrid (UCM), Health Research Institute Hospital 12 de Octubre (imas12), Institute of Research in Neurochemistry IUIN-UCM, Madrid, Spain
| | | | - Lourdes Casas
- Department of Chemical Engineering and Food Technology, Science Faculty, University of Cádiz, Cádiz, Spain
| | - Casimiro Mantell
- Department of Chemical Engineering and Food Technology, Science Faculty, University of Cádiz, Cádiz, Spain
| | - María Luisa Soto-Montenegro
- Ciber of Mental Health (CIBERSAM), ISCIII, Madrid, Spain
- Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain
- High Performance Research Group in Physiopathology and Pharmacology of the Digestive System (NeuGut), Universidad Rey Juan Carlos, Madrid, Spain
| | - Diego Romero-Miguel
- Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain
- Departamento de Bioingeniería e Ingeniería Aeroespacial, Universidad Carlos III de Madrid, Madrid, Spain
| | - Nicolás Lamanna-Rama
- Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain
- Departamento de Bioingeniería e Ingeniería Aeroespacial, Universidad Carlos III de Madrid, Madrid, Spain
| | - Juan Carlos Leza
- Ciber of Mental Health (CIBERSAM), ISCIII, Madrid, Spain
- Department of Pharmacology and Toxicology, Faculty of Medicine, Universidad Complutense de Madrid (UCM), Health Research Institute Hospital 12 de Octubre (imas12), Institute of Research in Neurochemistry IUIN-UCM, Madrid, Spain
| | - Manuel Desco
- Ciber of Mental Health (CIBERSAM), ISCIII, Madrid, Spain
- Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain
- Departamento de Bioingeniería e Ingeniería Aeroespacial, Universidad Carlos III de Madrid, Madrid, Spain
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain
| | - Esther Berrocoso
- Instituto de Investigación e Innovación en Ciencias Biomédicas de Cádiz, INiBICA, Hospital Universitario Puerta del Mar, Cádiz, Spain
- Neuropsychopharmacology and Psychobiology Research Group, Psychobiology Area, Department of Psychology, University of Cádiz, Cádiz, Spain
- Ciber of Mental Health (CIBERSAM), ISCIII, Madrid, Spain
- *Correspondence: Esther Berrocoso,
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Caruso A, Ricceri L, Caruso A, Nicoletti F, Gaetano A, Scaccianoce S. Postweaning social isolation and autism-like phenotype: a biochemical and behavioral comparative analysis. Behav Brain Res 2022; 428:113891. [PMID: 35421428 DOI: 10.1016/j.bbr.2022.113891] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 03/15/2022] [Accepted: 04/07/2022] [Indexed: 12/16/2022]
Abstract
Adolescence is a critical period for brain development. In most mammalian species, disturbances experienced during adolescence constitute a risk factor for several neuropsychiatric disorders. In this study, we compared the biochemical and behavioral profile induced by postweaning social isolation (PWSI) in inbred C57BL/6N mice with that of BTBR mice, a rodent model of autism spectrum disorders. Male C57BL/6N mice were either housed in groups of four or isolated from weaning (postnatal day 21) for four weeks before experimental analyses. After weaning, male BTBR mice were housed four per cage and analyzed at 48 days of age. PWSI reduced hippocampal levels of type 2 metabotropic glutamate (mGlu2) receptors, and glucocorticoid and mineralocorticoid receptors. A similar reduction was seen in group-housed BTBR mice. Plasma corticosterone levels in basal conditions were not influenced by PWSI, but were increased in BTBR mice. Social investigation (total and head sniffing) and the number of ultrasonic vocalizations were reduced in both PWSI mice and age-matched group-housed BTBR mice, indicating a lower social responsiveness in both groups of mice. These results suggest that absence of social stimuli during adolescence induces an endophenotype with social deficit features, which mimics the phenotype of a mouse model of autism spectrum disorders.
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Affiliation(s)
- Alessandra Caruso
- Department of Physiology and Pharmacology "V. Erspamer" University Sapienza of Rome, Italy.
| | - Laura Ricceri
- Centre for Behavioral Sciences and Mental Health, Istituto Superiore di Sanità, Rome, Italy.
| | - Angela Caruso
- Research Coordination and Support Service, Istituto Superiore di Sanità, Rome, Italy.
| | - Ferdinando Nicoletti
- Department of Physiology and Pharmacology "V. Erspamer" University Sapienza of Rome, Italy; IRCCS Neuromed, Pozzilli, Italy.
| | - Alessandra Gaetano
- Department of Physiology and Pharmacology "V. Erspamer" University Sapienza of Rome, Italy.
| | - Sergio Scaccianoce
- Department of Physiology and Pharmacology "V. Erspamer" University Sapienza of Rome, Italy.
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13
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Büki A, Bohár Z, Kekesi G, Vécsei L, Horvath G. Wisket rat model of schizophrenia: Impaired motivation and, altered brain structure, but no anhedonia. Physiol Behav 2021; 244:113651. [PMID: 34800492 DOI: 10.1016/j.physbeh.2021.113651] [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: 08/09/2021] [Revised: 11/12/2021] [Accepted: 11/13/2021] [Indexed: 01/17/2023]
Abstract
It is well-known that the poor cognition in schizophrenia is strongly linked to negative symptoms, including motivational deficit, which due to, at least partially, anhedonia. The goal of this study was to explore whether the schizophrenia-like Wisket animals with impaired motivation (obtained in the reward-based hole-board test), also show decreased hedonic behavior (investigated with the sucrose preference test). While neurochemical alterations of different neurotransmitter systems have been detected in the Wisket rats, no research has been performed on structural changes. Therefore, our additional aim was to reveal potential neuroanatomical and structural alterations in different brain regions in these rats. The rats showed decreased general motor activity (locomotion, rearing and exploration) and impaired task performance in the hole-board test compared to the controls, whereas no significant difference was observed in the sucrose preference test between the groups. The Wisket rats exhibited a significant decrease in the frontal cortical thickness and the hippocampal area, and moderate increases in the lateral ventricles and cell disarray in the CA3 subfield of hippocampus. To our knowledge, this is the first study to investigate the hedonic behavior and neuroanatomical alterations in a multi-hit animal model of schizophrenia. The results obtained in the sucrose preference test suggest that anhedonic behavior might not be involved in the impaired motivation obtained in the hole-board test. The neuropathological changes agree with findings obtained in patients with schizophrenia, which refine the high face validity of the Wisket model.
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Affiliation(s)
- Alexandra Büki
- Department of Physiology, Albert Szent-Györgyi Medical School, University of Szeged, Dóm tér 10., Szeged, H-6720, Hungary.
| | - Zsuzsanna Bohár
- MTA-SZTE Neuroscience Research Group, Semmelweis u. 6, Szeged, H-6725, Hungary
| | - Gabriella Kekesi
- Department of Physiology, Albert Szent-Györgyi Medical School, University of Szeged, Dóm tér 10., Szeged, H-6720, Hungary
| | - László Vécsei
- MTA-SZTE Neuroscience Research Group, Semmelweis u. 6, Szeged, H-6725, Hungary; Department of Neurology, Albert Szent-Györgyi Medical School, University of Szeged, Semmelweis u. 6., Szeged, H-6725, Hungary; Interdisciplinary Excellence Center, Department of Neurology, Albert Szent-Györgyi Medical School, University of Szeged, Semmelweis u. 6., Szeged, H-6725 Hungary
| | - Gyongyi Horvath
- Department of Physiology, Albert Szent-Györgyi Medical School, University of Szeged, Dóm tér 10., Szeged, H-6720, Hungary
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14
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Tapias-Espinosa C, Cañete T, Sampedro-Viana D, Brudek T, Kaihøj A, Oliveras I, Tobeña A, Aznar S, Fernández-Teruel A. Oxytocin attenuates schizophrenia-like reduced sensorimotor gating in outbred and inbred rats in line with strain differences in CD38 gene expression. Physiol Behav 2021; 240:113547. [PMID: 34364851 DOI: 10.1016/j.physbeh.2021.113547] [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: 03/11/2021] [Revised: 07/06/2021] [Accepted: 08/01/2021] [Indexed: 11/30/2022]
Abstract
Prepulse inhibition (PPI) of the startle response is a measure of sensorimotor gating that is impaired in many clinical conditions, including schizophrenia. The inbred Roman high-avoidance (RHA) rats, compared to their low-avoidance (RLA) counterparts, show distinct schizophrenia-like phenotypes, such as spontaneous deficits in PPI accompanied by decreased medial prefrontal cortex (mPFC) activity and volume. Schizophrenia-like deficits are usually attenuated by antipsychotic drugs, but these drugs often produce severe side effects. In order to reduce these side effects, the neuropeptide oxytocin has been proposed as an alternative natural antipsychotic for schizophrenia. Here, we examined the effects of peripheral oxytocin administration (saline, 0.04, and 0.2 mg/kg) on PPI in the RHA vs. RLA rats, as well as in the outbred heterogeneous stock (HS) rats. Our results showed that oxytocin increased PPI in the HS rats and attenuated PPI deficits in the RHA rats, but it did not significantly affect PPI in the RLAs. To explore whether these divergent effects were associated with differences in oxytocinergic mechanisms, we analyzed gene expression of the oxytocin receptor (OXTR) and the regulator of oxytocin release (CD38) in the mPFC of the Roman rats. Consistent with the differential oxytocin effects on PPI (RHA > RLA), constitutive CD38 expression was reduced in the RHA rats compared to the RLAs, while oxytocin administration increased OXTR expression in both strains. Overall, the present work reveals that oxytocin administration shows antipsychotic-like effects on PPI in outbred and inbred rats, and it suggests that these effects may be related to basal differences in oxytocin-mediated mechanisms in the mPFC.
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Affiliation(s)
- Carles Tapias-Espinosa
- Department of Psychiatry & Forensic Medicine, Institute of Neurosciences, Universitat Autònoma de Barcelona, Barcelona, Spain.
| | - Toni Cañete
- Department of Psychiatry & Forensic Medicine, Institute of Neurosciences, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Daniel Sampedro-Viana
- Department of Psychiatry & Forensic Medicine, Institute of Neurosciences, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Tomasz Brudek
- Research Laboratory for Stereology and Neuroscience, Bispebjerg-Frederiksberg Hospital, University Hospital of Copenhagen, Copenhagen, Denmark; Copenhagen Center for Translational Research, Bispebjerg-Frederiksberg Hospital, University Hospital of Copenhagen, Copenhagen, Denmark
| | - Anna Kaihøj
- Research Laboratory for Stereology and Neuroscience, Bispebjerg-Frederiksberg Hospital, University Hospital of Copenhagen, Copenhagen, Denmark; Copenhagen Center for Translational Research, Bispebjerg-Frederiksberg Hospital, University Hospital of Copenhagen, Copenhagen, Denmark
| | - Ignasi Oliveras
- Department of Psychiatry & Forensic Medicine, Institute of Neurosciences, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Adolf Tobeña
- Department of Psychiatry & Forensic Medicine, Institute of Neurosciences, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Susana Aznar
- Research Laboratory for Stereology and Neuroscience, Bispebjerg-Frederiksberg Hospital, University Hospital of Copenhagen, Copenhagen, Denmark; Copenhagen Center for Translational Research, Bispebjerg-Frederiksberg Hospital, University Hospital of Copenhagen, Copenhagen, Denmark.
| | - Alberto Fernández-Teruel
- Department of Psychiatry & Forensic Medicine, Institute of Neurosciences, Universitat Autònoma de Barcelona, Barcelona, Spain.
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15
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Hidden Role of Gut Microbiome Dysbiosis in Schizophrenia: Antipsychotics or Psychobiotics as Therapeutics? Int J Mol Sci 2021; 22:ijms22147671. [PMID: 34299291 PMCID: PMC8307070 DOI: 10.3390/ijms22147671] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 07/14/2021] [Accepted: 07/15/2021] [Indexed: 02/06/2023] Open
Abstract
Schizophrenia is a chronic, heterogeneous neurodevelopmental disorder that has complex symptoms and uncertain etiology. Mounting evidence indicates the involvement of genetics and epigenetic disturbances, alteration in gut microbiome, immune system abnormalities, and environmental influence in the disease, but a single root cause and mechanism involved has yet to be conclusively determined. Consequently, the identification of diagnostic markers and the development of psychotic drugs for the treatment of schizophrenia faces a high failure rate. This article surveys the etiology of schizophrenia with a particular focus on gut microbiota regulation and the microbial signaling system that correlates with the brain through the vagus nerve, enteric nervous system, immune system, and production of postbiotics. Gut microbially produced molecules may lay the groundwork for further investigations into the role of gut microbiota dysbiosis and the pathophysiology of schizophrenia. Current treatment of schizophrenia is limited to psychotherapy and antipsychotic drugs that have significant side effects. Therefore, alternative therapeutic options merit exploration. The use of psychobiotics alone or in combination with antipsychotics may promote the development of novel therapeutic strategies. In view of the individual gut microbiome structure and personalized response to antipsychotic drugs, a tailored and targeted manipulation of gut microbial diversity naturally by novel prebiotics (non-digestible fiber) may be a successful alternative therapeutic for the treatment of schizophrenia patients.
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Munawar N, Ahsan K, Muhammad K, Ahmad A, Anwar MA, Shah I, Al Ameri AK, Al Mughairbi F. Hidden Role of Gut Microbiome Dysbiosis in Schizophrenia: Antipsychotics or Psychobiotics as Therapeutics? Int J Mol Sci 2021. [DOI: https://doi.org/10.3390/ijms22147671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Schizophrenia is a chronic, heterogeneous neurodevelopmental disorder that has complex symptoms and uncertain etiology. Mounting evidence indicates the involvement of genetics and epigenetic disturbances, alteration in gut microbiome, immune system abnormalities, and environmental influence in the disease, but a single root cause and mechanism involved has yet to be conclusively determined. Consequently, the identification of diagnostic markers and the development of psychotic drugs for the treatment of schizophrenia faces a high failure rate. This article surveys the etiology of schizophrenia with a particular focus on gut microbiota regulation and the microbial signaling system that correlates with the brain through the vagus nerve, enteric nervous system, immune system, and production of postbiotics. Gut microbially produced molecules may lay the groundwork for further investigations into the role of gut microbiota dysbiosis and the pathophysiology of schizophrenia. Current treatment of schizophrenia is limited to psychotherapy and antipsychotic drugs that have significant side effects. Therefore, alternative therapeutic options merit exploration. The use of psychobiotics alone or in combination with antipsychotics may promote the development of novel therapeutic strategies. In view of the individual gut microbiome structure and personalized response to antipsychotic drugs, a tailored and targeted manipulation of gut microbial diversity naturally by novel prebiotics (non-digestible fiber) may be a successful alternative therapeutic for the treatment of schizophrenia patients.
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17
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Tendilla-Beltrán H, Sanchez-Islas NDC, Marina-Ramos M, Leza JC, Flores G. The prefrontal cortex as a target for atypical antipsychotics in schizophrenia, lessons of neurodevelopmental animal models. Prog Neurobiol 2020; 199:101967. [PMID: 33271238 DOI: 10.1016/j.pneurobio.2020.101967] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 10/10/2020] [Accepted: 11/22/2020] [Indexed: 02/06/2023]
Abstract
Prefrontal cortex (PFC) inflammatory imbalance, oxidative/nitrosative stress (O/NS) and impaired neuroplasticity in schizophrenia are thought to have neurodevelopmental origins. Animal models are not only useful to test this hypothesis, they are also effective to establish a relationship among brain disturbances and behavior with the atypical antipsychotics (AAPs) effects. Here we review data of PFC post-mortem and in vivo neuroimaging, human induced pluripotent stem cells (hiPSC), and peripheral blood studies of inflammatory, O/NS, and neuroplasticity alterations in the disease as well as about their modulation by AAPs. Moreover, we reviewed the PFC alterations and the AAP mechanisms beyond their canonical antipsychotic action in four neurodevelopmental animal models relevant to the study of schizophrenia with a distinct approach in the generation of schizophrenia-like phenotypes, but all converge in O/NS and altered neuroplasticity in the PFC. These animal models not only reinforce the neurodevelopmental risk factor model of schizophrenia but also arouse some novel potential therapeutic targets for the disease including the reestablishment of the antioxidant response by the perineuronal nets (PNNs) and the nuclear factor erythroid 2-related factor (Nrf2) pathway, as well as the dendritic spine dynamics in the PFC pyramidal cells.
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Affiliation(s)
- Hiram Tendilla-Beltrán
- Instituto de Fisiología, Benemérita Universidad Autónoma de Puebla (BUAP), Puebla, Mexico; Escuela Nacional de Ciencias Biológicas (ENCB), Instituto Politécnico Nacional (IPN), CDMX, Mexico
| | | | - Mauricio Marina-Ramos
- Departamento de Ciencias de la Salud, Universidad Popular Autónoma del Estado de Puebla, Puebla, Mexico
| | - Juan C Leza
- Departamento de Farmacología y Toxicología, Facultad de Medicina, Universidad Complutense de Madrid (UCM), Instituto Universitario de Investigación en Neuroquímica (IUIN), UCM. Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Instituto de Investigación Sanitaria Hospital, 12 de Octubre (Imas12), Madrid, Spain
| | - Gonzalo Flores
- Instituto de Fisiología, Benemérita Universidad Autónoma de Puebla (BUAP), Puebla, Mexico.
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18
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Chang YC, Li WY, Lee LJH, Lee LJ. Interplay of Prenatal and Postnatal Risk Factors in the Behavioral and Histological Features of a "Two-Hit" Non-Genetic Mouse Model of Schizophrenia. Int J Mol Sci 2020; 21:ijms21228518. [PMID: 33198225 PMCID: PMC7697169 DOI: 10.3390/ijms21228518] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 11/09/2020] [Accepted: 11/09/2020] [Indexed: 11/21/2022] Open
Abstract
Schizophrenia is a multifactorial developmental neuropsychiatric disorder. This study examined the interplay of maternal infection and postweaning social isolation, which are prenatal and postnatal risk factors, respectively. Pregnant mice received poly I:C or saline injection on gestation day 9 and the pups were weaned at postnatal day 28. After weaning, male offspring were randomly assigned into group-rearing and isolation-rearing groups. In their adulthood, we performed behavioral tests and characterized the histochemical features of their mesocorticolimbic structures. The sociability and anxiety levels were not affected by either manipulation, but synergistic effects of the two hits on stress-coping behavior was observed. Either of the single manipulations caused defects in sensorimotor gating, novel object recognition and spatial memory tests, but the combination of the two hits did not further exacerbate the disabilities. Prenatal infection increased the number of dopaminergic neurons in midbrain, whereas postweaning isolation decreased the GABAergic neurons in cortex. Single manipulation reduced the dendritic complexity and spine densities of neurons in the medial prefrontal cortex (mPFC) and dentate gyrus. Our results support the current perspective that disturbances in brain development during the prenatal or postnatal period influence the structure and function of the brain and together augment the susceptibility to mental disorders, such as schizophrenia.
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Affiliation(s)
- Yi-Chun Chang
- Graduate Institute of Anatomy and Cell Biology, College of Medicine, National Taiwan University, Taipei 10048, Taiwan; (Y.-C.C.); (W.-Y.L.)
| | - Wai-Yu Li
- Graduate Institute of Anatomy and Cell Biology, College of Medicine, National Taiwan University, Taipei 10048, Taiwan; (Y.-C.C.); (W.-Y.L.)
| | - Lukas Jyuhn-Hsiarn Lee
- National Institute of Environmental Health Sciences, National Health Research Institutes, Miaoli 35053, Taiwan;
| | - Li-Jen Lee
- Graduate Institute of Anatomy and Cell Biology, College of Medicine, National Taiwan University, Taipei 10048, Taiwan; (Y.-C.C.); (W.-Y.L.)
- Institute of Brain and Mind Sciences, College of Medicine, National Taiwan University, Taipei 10048, Taiwan
- Neurobiology and Cognitive Science Center, National Taiwan University, Taipei 10617, Taiwan
- Correspondence:
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19
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Arzate-Mejía RG, Lottenbach Z, Schindler V, Jawaid A, Mansuy IM. Long-Term Impact of Social Isolation and Molecular Underpinnings. Front Genet 2020; 11:589621. [PMID: 33193727 PMCID: PMC7649797 DOI: 10.3389/fgene.2020.589621] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 09/28/2020] [Indexed: 11/17/2022] Open
Abstract
Prolonged periods of social isolation can have detrimental effects on the physiology and behavior of exposed individuals in humans and animal models. This involves complex molecular mechanisms across tissues in the body which remain partly identified. This review discusses the biology of social isolation and describes the acute and lasting effects of prolonged periods of social isolation with a focus on the molecular events leading to behavioral alterations. We highlight the role of epigenetic mechanisms and non-coding RNA in the control of gene expression as a response to social isolation, and the consequences for behavior. Considering the use of strict quarantine during epidemics, like currently with COVID-19, we provide a cautionary tale on the indiscriminate implementation of such form of social isolation and its potential damaging and lasting effects in mental health.
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Affiliation(s)
- Rodrigo G Arzate-Mejía
- Laboratory of Neuroepigenetics, Medical Faculty of the University of Zurich and Department of Health Science and Technology of the Swiss Federal Institute of Technology, Neuroscience Center Zurich, Zurich, Switzerland
| | | | | | - Ali Jawaid
- Laboratory of Neuroepigenetics, Medical Faculty of the University of Zurich and Department of Health Science and Technology of the Swiss Federal Institute of Technology, Neuroscience Center Zurich, Zurich, Switzerland
| | - Isabelle M Mansuy
- Laboratory of Neuroepigenetics, Medical Faculty of the University of Zurich and Department of Health Science and Technology of the Swiss Federal Institute of Technology, Neuroscience Center Zurich, Zurich, Switzerland
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20
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Wang J, Yu W, Gao Q, Ju C, Wang K. Prefrontal inhibition of neuronal K v 7 channels enhances prepulse inhibition of acoustic startle reflex and resistance to hypofrontality. Br J Pharmacol 2020; 177:4720-4733. [PMID: 32839968 PMCID: PMC7520443 DOI: 10.1111/bph.15236] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Revised: 07/31/2020] [Accepted: 08/06/2020] [Indexed: 11/28/2022] Open
Abstract
Background and Purpose Dysfunction of the prefrontal cortex (PFC) is involved in the cognitive deficits in neuropsychiatric diseases, such as schizophrenia, characterized by deficient neurotransmission known as NMDA receptor hypofrontality. Thus, enhancing prefrontal activity may alleviate hypofrontality‐induced cognitive deficits. To test this hypothesis, we investigated the effect of forebrain‐specific suppression or pharmacological inhibition of native Kv7/KCNQ/M‐current on glutamatergic hypofrontality induced by the NMDA receptor antagonist MK‐801. Experimental Approach The forebrain‐specific inhibition of native M‐current was generated by transgenic expression, in mice, of a dominant‐negative pore mutant G279S of Kv7.2/KCNQ2 channels that suppresses channel function. A mouse model of cognitive impairment was established by single i.p. injection of 0.1 mg·kg−1 MK‐801. Mouse models of prepulse inhibition (PPI) of acoustic startle reflex and Y‐maze spontaneous alternation test were used for evaluation of cognitive behaviour. Hippocampal brain slice recordings of LTP were used to assess synaptic plasticity. Hippocampus and cortex were dissected for detecting protein expression using western blot analysis. Key Results Genetic suppression of Kv7 channel function in the forebrain or pharmacological inhibition of Kv7 channels by the specific blocker XE991 enhanced PPI and also alleviated MK‐801 induced cognitive decline. XE991 also attenuated MK‐801‐induced LTP deficits and increased basal synaptic transmissions. Western blot analysis revealed that inhibiting Kv7 channels resulted in elevation of pAkt1 and pGSK‐3β expressions in both hippocampus and cortex. Conclusions and Implications Both genetic and pharmacological inhibition of Kv7 channels alleviated PPI and cognitive deficits. Mechanistically, inhibition of Kv7 channels promotes synaptic transmission and activates Akt1/GSK‐3β signalling.
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Affiliation(s)
- Jing Wang
- Department of Pharmacology, School of Pharmacy, Qingdao University, Qingdao, China
| | - Wenwen Yu
- Department of Pharmacology, School of Pharmacy, Qingdao University, Qingdao, China.,Institute of Innovative Drugs, Qingdao University, Qingdao, China
| | - Qin Gao
- Department of Pharmacology, School of Pharmacy, Qingdao University, Qingdao, China
| | - Chuanxia Ju
- Department of Pharmacology, School of Pharmacy, Qingdao University, Qingdao, China
| | - KeWei Wang
- Department of Pharmacology, School of Pharmacy, Qingdao University, Qingdao, China.,Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired Intelligence, Guangzhou, China.,Institute of Innovative Drugs, Qingdao University, Qingdao, China
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21
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Δ-9-Tetrahydrocannabinol treatment during adolescence and alterations in the inhibitory networks of the adult prefrontal cortex in mice subjected to perinatal NMDA receptor antagonist injection and to postweaning social isolation. Transl Psychiatry 2020; 10:177. [PMID: 32488050 PMCID: PMC7266818 DOI: 10.1038/s41398-020-0853-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 05/11/2020] [Accepted: 05/19/2020] [Indexed: 12/18/2022] Open
Abstract
The prefrontal cortex (PFC) continues its development during adolescence and alterations in its structure and function, particularly of inhibitory networks, have been detected in schizophrenic patients. Since cannabis use during adolescence is a risk factor for this disease, our main objective was to investigate whether THC administration during this period might exacerbate alterations in prefrontocortical inhibitory networks in mice subjected to a perinatal injection of MK801 and postweaning social isolation. This double-hit model (DHM) combines a neurodevelopmental manipulation and the exposure to an aversive experience during early life; previous work has shown that DHM mice have important alterations in the structure and connectivity of PFC interneurons. In the present study we found that DHM had reductions in prepulse inhibition of the startle reflex (PPI), GAD67 expression and cingulate 1 cortex volume. Interestingly, THC by itself induced increases in PPI and decreases in the dendritic complexity of somatostatin expressing interneurons. Both THC and DHM reduced the density of parvalbumin expressing cells surrounded by perineuronal nets and, when combined, they disrupted the ratio between the density of puncta expressing excitatory and inhibitory markers. Our results support previous work showing alterations in parameters involving interneurons in similar animal models and schizophrenic patients. THC treatment does not modify further these parameters, but changes some others related also to interneurons and their plasticity, in some cases in the opposite direction to those induced by the DHM, suggesting a protective effect.
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22
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Schizophrenia-like reduced sensorimotor gating in intact inbred and outbred rats is associated with decreased medial prefrontal cortex activity and volume. Neuropsychopharmacology 2019; 44:1975-1984. [PMID: 30986819 PMCID: PMC6784988 DOI: 10.1038/s41386-019-0392-x] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 04/02/2019] [Accepted: 04/07/2019] [Indexed: 02/08/2023]
Abstract
Prepulse inhibition (PPI) of startle response is a measure of sensorimotor gating that is impaired in schizophrenia and in many other clinical conditions. Rat models using pharmacological or surgical strategies reveal that PPI is modulated by the cortico-striatal-pallido-thalamic (CSPT) circuit. Here, we explore whether spontaneous variation in PPI in intact inbred and outbred rats is associated with functional and structural differences in the CSPT circuit. Inbred Roman High-(RHA) and Low-avoidance (RLA) and outbred heterogeneous stock (HS) rats were assessed for PPI, brain activity, and brain volume. Brain activity was assessed by c-Fos expression and brain volume by magnetic resonance imaging. Relevant structures of the CSPT circuit were evaluated, such as the medial prefrontal cortex (mPFC), cingulate cortex, hippocampus (HPC), amygdala, nucleus accumbens (NAc), and dorsal striatum. RHA showed lower PPI than RLA rats, while HS rats were stratified by their PPI levels in three groups. Reduced PPI was accompanied by decreased mPFC activity in Roman and HS rats and increased NAc shell activity in HS rats. Low PPI was also associated with decreased mPFC and HPC volumes in Roman and HS rats. This study reports a consistent relationship between decreased function and volume of the mPFC and spontaneous low-PPI levels in inbred and outbred intact rats. Moreover, our findings suggest that, apart from a hypoactive and smaller mPFC, a hyperactive NAc and smaller HPC may underlie reduced PPI levels. Our results support the notion that sensorimotor gating is modulated by forebrain structures and highlight the importance of the mPFC in its regulation.
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23
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Conde-Moro AR, Rocha-Almeida F, Sánchez-Campusano R, Delgado-García JM, Gruart A. The activity of the prelimbic cortex in rats is enhanced during the cooperative acquisition of an instrumental learning task. Prog Neurobiol 2019; 183:101692. [PMID: 31521703 DOI: 10.1016/j.pneurobio.2019.101692] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Revised: 08/22/2019] [Accepted: 09/09/2019] [Indexed: 12/22/2022]
Abstract
The objective of this study was to identify the functional properties of the prefrontal cortex that allow animals to work together to obtain a mutual reward. We induced pairs of male rats to develop a cooperative behavior in two adjacent Skinner boxes divided by a metallic grille. The experimental boxes allowed the two rats to see and to smell each other and to have limited physical contact through the grille. Rats were progressively trained to climb onto two separate platforms (and stay there simultaneously for >0.5 s) to get food pellets for both. This set-up was compatible with the in vivo recording of local field potentials (LFPs) at the prelimbic (PrL) cortex throughout the task. A dominant delta/theta activity appeared mostly during the period in which rats were located on the platforms. Spectral powers were larger when rats had to stay together on the platforms than when they jumped individually onto them. When paired together, rats presented significant differences in the power of delta and low theta bands depending if they were leading or following the joint activity. PrL cortex encodes neural commands related to the individual and joint acquisition of an operant conditioning task by behaving rats.
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Affiliation(s)
- Ana R Conde-Moro
- Division of Neurosciences, Pablo de Olavide University, Seville-41013, Spain
| | | | | | | | - Agnès Gruart
- Division of Neurosciences, Pablo de Olavide University, Seville-41013, Spain.
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24
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Sánchez-González A, Oliveras I, Río-Álamos C, Piludu MA, Gerbolés C, Tapias-Espinosa C, Tobeña A, Aznar S, Fernández-Teruel A. Dissociation between schizophrenia-relevant behavioral profiles and volumetric brain measures after long-lasting social isolation in Roman rats. Neurosci Res 2019; 155:43-55. [PMID: 31306676 DOI: 10.1016/j.neures.2019.07.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 07/02/2019] [Accepted: 07/05/2019] [Indexed: 11/29/2022]
Abstract
Social isolation rearing of rodents is an environmental manipulation known to induce or potentiate psychotic-like symptoms and attentional and cognitive impairments relevant for schizophrenia. When subjected to a 28-week isolation rearing treatment, the Roman high-avoidance (RHA-I) rats display the common behavioral social isolation syndrome, with prepulse inhibition (PPI) deficits, hyperactivity, increased anxiety responses and learning/memory impairments when compared to their low-avoidance (RLA-I) counterparts. These results add face validity to the RHA-I rats as an animal model for schizophrenia-relevant behavioral and cognitive profiles and confirm previous results. The aim here was to further investigate the neuroanatomical effects of the isolation rearing, estimated through volume differences in medial prefrontal cortex (mPFC), dorsal striatum (dSt) and hippocampus (HPC). Results showed a global increase in volume in the mPFC in the isolated rats of both strains, as well as strain effects (RLA > RHA) in the three brain regions. These unexpected but robust results, might have unveiled some kind of compensatory mechanisms due to the particularly long-lasting isolation rearing period, much longer than those commonly used in the literature (which usually range from 4 to 12 weeks).
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Affiliation(s)
- A Sánchez-González
- Dept. Psychiatry & Forensic Medicine, Institute of Neurosciences, Universidad Autónoma de Barcelona, Barcelona, Spain.
| | - I Oliveras
- Dept. Psychiatry & Forensic Medicine, Institute of Neurosciences, Universidad Autónoma de Barcelona, Barcelona, Spain
| | - C Río-Álamos
- Dept. Psychology, School of Medicine, Austral University of Chile, Valdivia, Chile
| | - M A Piludu
- Dept. of Life and Environmental Sciences, Section of Pharmaceutical, Pharmacological and Nutraceutical Sciences, University of Cagliari, Cagliari, Italy
| | - C Gerbolés
- Dept. Psychiatry & Forensic Medicine, Institute of Neurosciences, Universidad Autónoma de Barcelona, Barcelona, Spain
| | - C Tapias-Espinosa
- Dept. Psychiatry & Forensic Medicine, Institute of Neurosciences, Universidad Autónoma de Barcelona, Barcelona, Spain
| | - A Tobeña
- Dept. Psychiatry & Forensic Medicine, Institute of Neurosciences, Universidad Autónoma de Barcelona, Barcelona, Spain
| | - S Aznar
- Research Laboratory for Stereology and Neuroscience, Bispebjerg and Frederiksberg Hospitals, Copenhagen, Denmark.
| | - A Fernández-Teruel
- Dept. Psychiatry & Forensic Medicine, Institute of Neurosciences, Universidad Autónoma de Barcelona, Barcelona, Spain.
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25
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Liu Y, Sun Y, Zhao X, Kim JY, Luo L, Wang Q, Meng X, Li Y, Sui N, Chen ZF, Pan C, Li L, Zhang Y. Enhancement of Aggression Induced by Isolation Rearing is Associated with a Lack of Central Serotonin. Neurosci Bull 2019; 35:841-852. [PMID: 30977041 DOI: 10.1007/s12264-019-00373-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Accepted: 01/13/2019] [Indexed: 01/06/2023] Open
Abstract
Isolation rearing (IR) enhances aggressive behavior, and the central serotonin (5-hydroxytryptamine, 5-HT) system has been linked to IR-induced aggression. However, whether the alteration of central serotonin is the cause or consequence of enhanced aggression is still unknown. In the present study, using mice deficient in central serotonin Tph2-/- and Lmx1b-/-, we examined the association between central serotonin and aggression with or without social isolation. We demonstrated that central serotonergic neurons are critical for the enhanced aggression after IR. 5-HT depletion in wild-type mice increased aggression. On the other hand, application of 5-HT in Lmx1b-/- mice inhibited the enhancement of aggression under social isolation conditions. Dopamine was downregulated in Lmx1b-/- mice. Similar to 5-HT, L-DOPA decreased aggression in Lmx1b-/- mice. Our results link the serotoninergic system directly to aggression and this may have clinical implications for aggression-related human conditions.
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Affiliation(s)
- Yiqiong Liu
- State Key Laboratory of Membrane Biology, College of Life Sciences, Peking University, Beijing, 100871, China.,PKU-IDG/McGovern Institute for Brain Research, Beijing, 100871, China
| | | | - Xiaoyan Zhao
- Department of Anesthesiology, Beijing Tongren Hospital, Capital Medical University, Beijing, 100005, China
| | - Ji-Young Kim
- Department of Anesthesiology, Department of Psychiatry, Department of Developmental Biology, Center for the Study of Itch, Washington University School of Medicine, Saint Louis, MO, 63110, USA
| | - Lu Luo
- School of Psychological and Cognitive Sciences, Beijing Key Laboratory of Behavior and Mental Health, Peking University, Beijing, 100871, China
| | - Qian Wang
- School of Psychological and Cognitive Sciences, Beijing Key Laboratory of Behavior and Mental Health, Peking University, Beijing, 100871, China
| | - Xiaolu Meng
- Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Yonghui Li
- Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Nan Sui
- Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Zhou-Feng Chen
- Department of Anesthesiology, Department of Psychiatry, Department of Developmental Biology, Center for the Study of Itch, Washington University School of Medicine, Saint Louis, MO, 63110, USA
| | - Chuxiong Pan
- Department of Anesthesiology, Beijing Tongren Hospital, Capital Medical University, Beijing, 100005, China
| | - Liang Li
- School of Psychological and Cognitive Sciences, Beijing Key Laboratory of Behavior and Mental Health, Peking University, Beijing, 100871, China. .,Beijing Institute for Brain Disorders, Beijing, 100069, China.
| | - Yan Zhang
- State Key Laboratory of Membrane Biology, College of Life Sciences, Peking University, Beijing, 100871, China. .,PKU-IDG/McGovern Institute for Brain Research, Beijing, 100871, China.
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26
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Río-Álamos C, Piludu MA, Gerbolés C, Barroso D, Oliveras I, Sánchez-González A, Cañete T, Tapias-Espinosa C, Sampedro-Viana D, Torrubia R, Tobeña A, Fernández-Teruel A. Volumetric brain differences between the Roman rat strains: Neonatal handling effects, sensorimotor gating and working memory. Behav Brain Res 2019; 361:74-85. [DOI: 10.1016/j.bbr.2018.12.033] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 11/23/2018] [Accepted: 12/17/2018] [Indexed: 12/20/2022]
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27
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Peleh T, Ike KG, Wams EJ, Lebois EP, Hengerer B. The reverse translation of a quantitative neuropsychiatric framework into preclinical studies: Focus on social interaction and behavior. Neurosci Biobehav Rev 2019; 97:96-111. [DOI: 10.1016/j.neubiorev.2018.07.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2017] [Revised: 05/29/2018] [Accepted: 07/27/2018] [Indexed: 12/12/2022]
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28
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Corsi-Zuelli F, Fachim HA, Loureiro CM, Shuhama R, Bertozi G, Joca SRL, Menezes PR, Louzada-Junior P, Del-Ben CM. Prolonged Periods of Social Isolation From Weaning Reduce the Anti-inflammatory Cytokine IL-10 in Blood and Brain. Front Neurosci 2019; 12:1011. [PMID: 30686977 PMCID: PMC6337063 DOI: 10.3389/fnins.2018.01011] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 12/17/2018] [Indexed: 01/31/2023] Open
Abstract
Life stressors during critical periods are reported to trigger an immune dysfunction characterised by abnormal production of inflammatory cytokines. Despite the relationship between early stressors and schizophrenia is described, the evidence on inflammatory biomarkers remains limited. We aimed to investigate whether an imbalance between pro- and anti-inflammatory cytokines in the brain is reflected in the peripheral blood of rats submitted to post-weaning social isolation (pwSI), a model with validity to study schizophrenia. We evaluated pro- and anti-inflammatory cytokines (IL-6, TNF-α, and IL-10) simultaneously at blood, prefrontal cortex and hippocampal tissues (Milliplex MAP), including the respective cytokines gene expression (mRNA) (qRT-PCR TaqMan mastermix). We also performed a correlation matrix to explore significant correlations among cytokines (protein and mRNA) in blood and brain, as well as cytokines and total number of square crossings in the open field for isolated-reared animals. Male Wistar rats (n = 10/group) were kept isolated (n = 1/cage) or grouped (n = 3–4/cage) since weaning for 10 weeks. After this period, rats were assessed for locomotion and sacrificed for blood and brain cytokines measurements. Prolonged pwSI decreased IL-10 protein and mRNA in the blood, and IL-10 protein in the hippocampus, along with decreased IL-6 and its mRNA expression in the prefrontal cortex. Our results also showed that cytokines tend to correlate to one-another among the compartments investigated, although blood and brain correlations are far from perfect. IL-10 hippocampal levels were negatively correlated with hyperlocomotion in the open field. Despite the unexpected decrease in IL-6 and unchanged TNF-α levels contrast to the expected pro-inflammatory phenotype, this may suggest that reduced anti-inflammatory signalling may be critical for eliciting abnormal behaviour in adulthood. Altogether, these results suggest that prolonged early-life adverse events reduce the ability to build proper anti-inflammatory cytokine that is translated from blood-to-brain.
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Affiliation(s)
- Fabiana Corsi-Zuelli
- Division of Psychiatry, Department of Neuroscience and Behavior, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Helene Aparecida Fachim
- Division of Psychiatry, Department of Neuroscience and Behavior, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil.,Biomolecular Sciences Research Centre, Sheffield Hallam University, Sheffield, United Kingdom
| | - Camila Marcelino Loureiro
- Division of Clinical Immunology, Department of Internal Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Rosana Shuhama
- Division of Psychiatry, Department of Neuroscience and Behavior, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Giuliana Bertozi
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Sâmia Regiane Lourenço Joca
- Department of Physics and Chemistry, School of Pharmaceutical Sciences, University of São Paulo, Ribeirão Preto, Brazil.,Department of Clinical Medicine, Translational Neuropsychiatry Unit, Aarhus University, Aarhus, Denmark
| | - Paulo Rossi Menezes
- Department of Preventive Medicine, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | - Paulo Louzada-Junior
- Division of Clinical Immunology, Department of Internal Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Cristina Marta Del-Ben
- Division of Psychiatry, Department of Neuroscience and Behavior, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
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29
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Social isolation impairs active avoidance performance and decreases neurogenesis in the dorsomedial telencephalon of rainbow trout. Physiol Behav 2019; 198:1-10. [DOI: 10.1016/j.physbeh.2018.10.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Revised: 10/04/2018] [Accepted: 10/04/2018] [Indexed: 11/22/2022]
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30
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Reinwald JR, Becker R, Mallien AS, Falfan-Melgoza C, Sack M, Clemm von Hohenberg C, Braun U, Cosa Linan A, Gass N, Vasilescu AN, Tollens F, Lebhardt P, Pfeiffer N, Inta D, Meyer-Lindenberg A, Gass P, Sartorius A, Weber-Fahr W. Neural Mechanisms of Early-Life Social Stress as a Developmental Risk Factor for Severe Psychiatric Disorders. Biol Psychiatry 2018; 84:116-128. [PMID: 29397900 DOI: 10.1016/j.biopsych.2017.12.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2017] [Revised: 11/21/2017] [Accepted: 12/14/2017] [Indexed: 12/11/2022]
Abstract
BACKGROUND To explore the domain-general risk factor of early-life social stress in mental illness, rearing rodents in persistent postweaning social isolation has been established as a widely used animal model with translational relevance for neurodevelopmental psychiatric disorders such as schizophrenia. Although changes in resting-state brain connectivity are a transdiagnostic key finding in neurodevelopmental diseases, a characterization of imaging correlates elicited by early-life social stress is lacking. METHODS We performed resting-state functional magnetic resonance imaging of postweaning social isolation rats (N = 23) 9 weeks after isolation. Addressing well-established transdiagnostic connectivity changes of psychiatric disorders, we focused on altered frontal and posterior connectivity using a seed-based approach. Then, we examined changes in regional network architecture and global topology using graph theoretical analysis. RESULTS Seed-based analyses demonstrated reduced functional connectivity in frontal brain regions and increased functional connectivity in posterior brain regions of postweaning social isolation rats. Graph analyses revealed a shift of the regional architecture, characterized by loss of dominance of frontal regions and emergence of nonfrontal regions, correlating to our behavioral results, and a reduced modularity in isolation-reared rats. CONCLUSIONS Our result of functional connectivity alterations in the frontal brain supports previous investigations postulating social neural circuits, including prefrontal brain regions, as key pathways for risk for mental disorders arising through social stressors. We extend this knowledge by demonstrating more widespread changes of brain network organization elicited by early-life social stress, namely a shift of hubness and dysmodularity. Our results highly resemble core alterations in neurodevelopmental psychiatric disorders such as schizophrenia, autism, and attention-deficit/hyperactivity disorder in humans.
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Affiliation(s)
- Jonathan Rochus Reinwald
- Research Group Translational Imaging, Department of Neuroimaging, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Heidelberg, Germany; Department of Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Heidelberg, Germany.
| | - Robert Becker
- Research Group Translational Imaging, Department of Neuroimaging, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Heidelberg, Germany
| | - Anne Stephanie Mallien
- Research Group Animal Models in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Heidelberg, Germany
| | - Claudia Falfan-Melgoza
- Research Group Translational Imaging, Department of Neuroimaging, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Heidelberg, Germany
| | - Markus Sack
- Research Group Translational Imaging, Department of Neuroimaging, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Heidelberg, Germany
| | - Christian Clemm von Hohenberg
- Research Group Translational Imaging, Department of Neuroimaging, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Heidelberg, Germany; Department of Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Heidelberg, Germany
| | - Urs Braun
- Department of Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Heidelberg, Germany; Research Group Systems Neuroscience in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Heidelberg, Germany
| | - Alejandro Cosa Linan
- Research Group In Silico Psychopharmacology, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Heidelberg, Germany
| | - Natalia Gass
- Research Group Translational Imaging, Department of Neuroimaging, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Heidelberg, Germany
| | - Andrei-Nicolae Vasilescu
- Department of Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Heidelberg, Germany; Research Group Animal Models in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Heidelberg, Germany
| | - Fabian Tollens
- Research Group Translational Imaging, Department of Neuroimaging, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Heidelberg, Germany
| | - Philipp Lebhardt
- Research Group Translational Imaging, Department of Neuroimaging, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Heidelberg, Germany
| | - Natascha Pfeiffer
- Research Group Animal Models in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Heidelberg, Germany
| | - Dragos Inta
- Department of Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Heidelberg, Germany; Research Group Animal Models in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Heidelberg, Germany; Department of Psychiatry, University of Basel, Basel, Switzerland
| | - Andreas Meyer-Lindenberg
- Department of Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Heidelberg, Germany
| | - Peter Gass
- Department of Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Heidelberg, Germany; Research Group Animal Models in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Heidelberg, Germany
| | - Alexander Sartorius
- Research Group Translational Imaging, Department of Neuroimaging, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Heidelberg, Germany; Department of Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Heidelberg, Germany
| | - Wolfgang Weber-Fahr
- Research Group Translational Imaging, Department of Neuroimaging, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Heidelberg, Germany
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Jafari Z, Kolb BE, Mohajerani MH. Chronic traffic noise stress accelerates brain impairment and cognitive decline in mice. Exp Neurol 2018; 308:1-12. [PMID: 29936225 DOI: 10.1016/j.expneurol.2018.06.011] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 06/08/2018] [Accepted: 06/21/2018] [Indexed: 11/26/2022]
Abstract
Although traffic noise exposure is a well-known environmental pollutant whose negative health effect has been discussed in different aspects of the human life, only a few animal studies have tackled this issue as a cohort study, which is not feasible to be addressed in human studies. In addition to the deleterious impact of the daytime noise on well-being, chronic nocturnal noise can also disturb sleep and affects physical and mental health, but to date, little research has examined the neurobiological effects of light/dark cycles of traffic noise exposure. We investigated the effects of light/dark cycles and sex on the impact of chronic traffic noise exposure on mouse brain structure-function. The mice were randomly assigned to either one of two stress conditions or a control condition. Animals were exposed to traffic noise on either the light-cycle (LC) or dark-cycle (DC) for 30 days. Traffic noise exposure caused the hypothalamic-pituitary-adrenal (HPA) axis hyperactivity, anxiety-like behavior, impairments in learning and memory, dysfunction in balance and motor coordination, and a reduction in variety of brain measures including a brain volume, medial prefrontal cortex (mPFC) area, cortical thickness, hippocampal volume, amygdala area, and the neural density in mPFC and dentate gyrus. All behavioral and brain measures revealed adverse effects of the chronic noise stress irrespective of the LC/DC exposure or sex. Our findings were a re-emphasis on the significance of noise prevention and mitigation strategies for public health.
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Affiliation(s)
- Zahra Jafari
- Department of Neuroscience, Canadian Center for Behavioural Neuroscience, University of Lethbridge, Lethbridge, AB T1K 3M4, Canada; Department of Basic Sciences in Rehabilitation, School of Rehabilitation Sciences, Iran University of Medical Science (IUMS), Tehran, Iran
| | - Bryan E Kolb
- Department of Neuroscience, Canadian Center for Behavioural Neuroscience, University of Lethbridge, Lethbridge, AB T1K 3M4, Canada.
| | - Majid H Mohajerani
- Department of Neuroscience, Canadian Center for Behavioural Neuroscience, University of Lethbridge, Lethbridge, AB T1K 3M4, Canada.
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Fitzgerald ML, Pickel VM. Adolescent isolation rearing produces a prepulse inhibition deficit correlated with expression of the NMDA GluN1 subunit in the nucleus accumbens. Brain Struct Funct 2018; 223:3169-3181. [PMID: 29779156 DOI: 10.1007/s00429-018-1673-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Accepted: 04/27/2018] [Indexed: 12/18/2022]
Abstract
Adolescence is a transition period during which social interaction is necessary for normal brain and behavior development. Severely abnormal social interactions during adolescence can increase the incidence of lifelong psychiatric disease. Decreased prepulse inhibition (PPI) is a quantifiable hallmark of some psychiatric illnesses in humans and can be elicited in rodents by isolation rearing throughout the adolescent transition period. PPI is a measure of sensorimotor gating in which the nucleus accumbens (Acb) is crucially involved. The Acb is comprised of core and shell subregions, which receive convergent dopaminergic and glutamatergic inputs. To gain insight into the neurobiological correlates of adolescent adversity, we conducted electron microscopic immunolabeling of dopamine D1 receptors (D1Rs) and the GluN1 subunit of glutamate NMDA receptors in the Acb of isolation-reared (IR) adult male rats. In all animals, GluN1 was primarily located in dendritic profiles, many of which also contained D1Rs. GluN1 was also observed in perisynaptic glia and axon terminals. In IR rats compared with group-reared controls, GluN1 density was selectively decreased in D1R-containing dendrites of the Acb core. Across all animals, dendritic GluN1 density correlated with average percent PPI, implicating endogenous expression of NMDA receptors of the Acb as a possible substrate of the PPI response. These results suggest that adolescent isolation dampens NMDA-mediated excitation in direct (D1R-containing) output neurons of the Acb, and that these changes influence the operational measure of PPI.
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Affiliation(s)
- Megan L Fitzgerald
- Brain and Mind Research Institute, Weill Cornell Medicine, 407 East 61st Street, New York, NY, 10065, USA
- New York State Psychiatric Institute, Columbia University, New York, NY, 10032, USA
| | - Virginia M Pickel
- Brain and Mind Research Institute, Weill Cornell Medicine, 407 East 61st Street, New York, NY, 10065, USA.
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Lo Iacono L, Carola V. The impact of adolescent stress experiences on neurobiological development. Semin Cell Dev Biol 2018; 77:93-103. [DOI: 10.1016/j.semcdb.2017.09.040] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Revised: 09/18/2017] [Accepted: 09/29/2017] [Indexed: 01/23/2023]
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Consumption of a High-Fat Diet Alters Perineuronal Nets in the Prefrontal Cortex. Neural Plast 2018; 2018:2108373. [PMID: 29849552 PMCID: PMC5937429 DOI: 10.1155/2018/2108373] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 03/14/2018] [Accepted: 03/25/2018] [Indexed: 01/25/2023] Open
Abstract
A key factor in the development of obesity is the overconsumption of fatty foods, which, in addition to facilitating weight gain, alters neuronal structures within brain reward circuitry. Our previous work demonstrates that sustained consumption of a high-fat diet (HFD) attenuates spine density in the prefrontal cortex (PFC). Whether HFD promotes structural adaptation among inhibitory cells of the PFC is presently unknown. One structure of interest is the perineuronal net (PNN), a specialized extracellular matrix surrounding, primarily, parvalbumin-containing GABAergic interneurons. PNNs contribute to synaptic stabilization, protect against oxidative stress, regulate the ionic microenvironment within cells, and modulate regional excitatory output. To examine diet-induced changes in PNNs, we maintained rats on one of three dietary conditions for 21 days: ad libitum chow, ad libitum 60% high fat (HF-AL), or limited-access calorically matched high fat (HF-CM), which produced no significant change in weight gain or adiposity with respect to chow controls. The PNN “number” and intensity were then quantified in the prelimbic (PL-PFC), infralimbic (IL-PFC), and ventral orbitofrontal cortex (OFC) using Wisteria floribunda agglutinin (WFA). Our results demonstrated that fat exposure, independent of weight gain, induced a robust decrease in the PNN intensity in the PL-PFC and OFC and a decrease in the PNN number in the OFC.
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Macht VA, Reagan LP. Chronic stress from adolescence to aging in the prefrontal cortex: A neuroimmune perspective. Front Neuroendocrinol 2018; 49:31-42. [PMID: 29258741 DOI: 10.1016/j.yfrne.2017.12.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Revised: 11/22/2017] [Accepted: 12/15/2017] [Indexed: 12/21/2022]
Abstract
The development of the organism is a critical variable which influences the magnitude, duration, and reversibility of the effects of chronic stress. Such factors are relevant to the prefrontal cortex (PFC), as this brain region is the last to mature, the first to decline, and is highly stress-sensitive. Therefore, this review will examine the intersection between the nervous system and immune system at glutamatergic synapses in the PFC across three developmental periods: adolescence, adulthood, and aging. Glutamatergic synapses are tightly juxtaposed with microglia and astrocytes, and each of these cell types exhibits their own developmental trajectory. Not only does chronic stress differentially impact each of these cell types across development, but chronic stress also alters intercellular communication within this quad-partite synapse. These observations suggest that developmental shifts in both neural and immune function across neurons, microglia, and astrocytes mediate shifting effects of chronic stress on glutamatergic transmission.
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Affiliation(s)
- Victoria A Macht
- University of South Carolina School of Medicine, Department of Pharmacology, Physiology, and Neuroscience, Columbia, SC, United States; University of South Carolina, Department of Psychology, Columbia, SC, United States.
| | - Lawrence P Reagan
- University of South Carolina School of Medicine, Department of Pharmacology, Physiology, and Neuroscience, Columbia, SC, United States; Wm. Jennings Bryan Dorn VA Medical Center, Columbia, SC, United States
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Antidepressant effect of recombinant NT4-NAP/AAV on social isolated mice through intranasal route. Oncotarget 2018; 8:10103-10113. [PMID: 28052034 PMCID: PMC5354645 DOI: 10.18632/oncotarget.14356] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Accepted: 12/13/2016] [Indexed: 12/26/2022] Open
Abstract
The purpose of the present study was to observe the depression-like behavior induced by social isolation; detect the antidepressant effect of a recombinant adeno-associated virus (AAV) expressing NAP on social isolation mice by intranasal delivery. After construction of NT4-NAP/AAV, expression of NAP was confirmed in vitro. 3-week-old C57/BL mice were bred individually in cages as social isolation-rearing. Six weeks later, the first subset of mice underwent behavioral tests and western blot; the second was for enzyme-linked immunosorbent assay. NT4-NAP/AAV was delivered quaque die by nasal administration for consecutive 10 days before behavioral test. Several depression-like behaviors were observed in social isolation mice, including decreased relative sucrose preference, longer immobility time in forced swimming test, lower plasma corticosterone and decreased brain-derived neurotrophic factor in hippocampus. Thus, social isolation procedure appears to be an animal model of depression with good face and construct validity. What's more, the antidepressant effect in social isolation-rearing mice was observed after intranasal administration of NT4-NAP/AAV, suggesting that this might be a promising therapeutic strategy for depressive disorder.
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Monoacylglycerol lipase inhibition alters social behavior in male and female rats after post-weaning social isolation. Behav Brain Res 2017; 341:146-153. [PMID: 29292159 DOI: 10.1016/j.bbr.2017.12.038] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 12/09/2017] [Accepted: 12/28/2017] [Indexed: 12/15/2022]
Abstract
Post-weaning social isolation (PSI) has been shown to increase aggressive behavior and alter medial prefrontal cortex (mPFC) function in rats. The present study sought to determine whether this phenotype would be normalized by increasing levels of the endocannabinoid 2-arachidonoylglycerol (2-AG) using pharmacological inhibition of monoacylglycerol lipase (MAGL). Male and female Sprague-Dawley rats were exposed to either 4 weeks of PSI or social rearing (SR) starting on postnatal day 21, then underwent a 15 min trial of social interaction with a novel, same-sex juvenile rat. Rats were administered an acute injection of the MAGL inhibitor MJN110 or vehicle prior to the social interaction. Rats received either 0 mg/kg (vehicle), 1 mg/kg, or 5 mg/kg of MJN110. Both doses of MJN110 decreased aggressive grooming, a measure of agonistic behavior, in both males and females, largely driven by decreased aggressive grooming in PSI rats. There were no effects of MJN110 on overall social behavior or play behavior, while modest effects were observed on locomotor activity in SR rats only. While social interaction increased c-Fos expression in the mPFC of both males and females, MJN110 reduced c-Fos preferentially in females. These results suggest that 2-AG can modulate specific social behaviors during adolescence, and may affect mPFC function differentially in males and females.
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Models of progressive neurological dysfunction originating early in life. Prog Neurobiol 2017; 155:2-20. [DOI: 10.1016/j.pneurobio.2015.10.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Revised: 09/11/2015] [Accepted: 10/11/2015] [Indexed: 01/01/2023]
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Minami C, Shimizu T, Mitani A. Neural activity in the prelimbic and infralimbic cortices of freely moving rats during social interaction: Effect of isolation rearing. PLoS One 2017; 12:e0176740. [PMID: 28459875 PMCID: PMC5411063 DOI: 10.1371/journal.pone.0176740] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2016] [Accepted: 04/14/2017] [Indexed: 12/26/2022] Open
Abstract
Sociability promotes a sound daily life for individuals. Reduced sociability is a central symptom of various neuropsychiatric disorders, and yet the neural mechanisms underlying reduced sociability remain unclear. The prelimbic cortex (PL) and infralimbic cortex (IL) have been suggested to play an important role in the neural mechanisms underlying sociability because isolation rearing in rats results in impairment of social behavior and structural changes in the PL and IL. One possible mechanism underlying reduced sociability involves dysfunction of the PL and IL. We made a wireless telemetry system to record multiunit activity in the PL and IL of pairs of freely moving rats during social interaction and examined the influence of isolation rearing on this activity. In group-reared rats, PL neurons increased firing when the rat showed approaching behavior and also contact behavior, especially when the rat attacked the partner. Conversely, IL neurons increased firing when the rat exhibited leaving behavior, especially when the partner left on its own accord. In social interaction, the PL may be involved in active actions toward others, whereas the IL may be involved in passive relief from cautionary subjects. Isolation rearing altered social behavior and neural activity. Isolation-reared rats showed an increased frequency and decreased duration of contact behavior. The increased firing of PL neurons during approaching and contact behavior, observed in group-reared rats, was preserved in isolation-reared rats, whereas the increased firing of IL neurons during leaving behavior, observed in group-reared rats, was suppressed in isolation-reared rats. This result indicates that isolation rearing differentially alters neural activity in the PL and IL during social behavior. The differential influence of isolation rearing on neural activity in the PL and IL may be one of the neural bases of isolation rearing-induced behavior.
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Affiliation(s)
- Chihiro Minami
- Laboratory of Physiology, Department of Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Tomoko Shimizu
- Laboratory of Physiology, Department of Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Akira Mitani
- Laboratory of Physiology, Department of Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
- * E-mail:
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Structural and functional alterations in the prefrontal cortex after post-weaning social isolation: relationship with species-typical and deviant aggression. Brain Struct Funct 2016; 222:1861-1875. [DOI: 10.1007/s00429-016-1312-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Accepted: 09/13/2016] [Indexed: 12/19/2022]
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Goodell DJ, Ahern MA, Baynard J, Wall VL, Bland ST. A novel escapable social interaction test reveals that social behavior and mPFC activation during an escapable social encounter are altered by post-weaning social isolation and are dependent on the aggressiveness of the stimulus rat. Behav Brain Res 2016; 317:1-15. [PMID: 27633556 DOI: 10.1016/j.bbr.2016.09.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 09/05/2016] [Accepted: 09/11/2016] [Indexed: 01/18/2023]
Abstract
Post-weaning social isolation (PSI) has been shown to increase aggressive behavior and alter medial prefrontal cortex (mPFC) function in social species such as rats. Here we developed a novel escapable social interaction test (ESIT) allowing for the quantification of escape and social behaviors in addition to mPFC activation in response to an aggressive or nonaggressive stimulus rat. Male rats were exposed to 3 weeks of PSI (ISO) or group (GRP) housing, and exposed to 3 trials, with either no trial, all trials, or the last trial only with a stimulus rat. Analysis of social behaviors indicated that ISO rats spent less time in the escape chamber and more time engaged in social interaction, aggressive grooming, and boxing than did GRP rats. Interestingly, during the third trial all rats engaged in more of the quantified social behaviors and spent less time escaping in response to aggressive but not nonaggressive stimulus rats. Rats exposed to nonaggressive stimulus rats on the third trial had greater c-fos and ARC immunoreactivity in the mPFC than those exposed to an aggressive stimulus rat. Conversely, a social encounter produced an increase in large PSD-95 punctae in the mPFC independently of trial number, but only in ISO rats exposed to an aggressive stimulus rat. The results presented here demonstrate that PSI increases interaction time and aggressive behaviors during escapable social interaction, and that the aggressiveness of the stimulus rat in a social encounter is an important component of behavioral and neural outcomes for both isolation and group-reared rats.
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Affiliation(s)
- Dayton J Goodell
- Department of Pharmacology, Program in Neuroscience, University of Colorado AMC, Aurora, CO, United States
| | - Megan A Ahern
- College of Medicine, University of Arizona, Tucson, AZ, United States
| | - Jessica Baynard
- Department of Psychology, University of Colorado Denver, Denver, CO, United States
| | - Vanessa L Wall
- Department of Psychology, University of Colorado Denver, Denver, CO, United States
| | - Sondra T Bland
- Department of Psychology, University of Colorado Denver, Denver, CO, United States.
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Negative visuospatial priming in isolation-reared rats: Evidence of resistance to the disruptive effects of amphetamine. COGNITIVE AFFECTIVE & BEHAVIORAL NEUROSCIENCE 2016. [PMID: 26220402 DOI: 10.3758/s13415-015-0369-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Negative visuospatial priming (NP) represents a quantifiable measure of inhibitory information processing that is disrupted in several neurodevelopmental and psychiatric disorders, including schizophrenia. We developed a novel rodent NP task to investigate mechanisms underlying NP and its role in various disorders, and to test potential therapeutics. In the present studies, we further characterized this novel paradigm by investigating whether NP is disrupted in rats reared in isolation, a developmental manipulation that produces a range of abnormalities in behavior, neurochemistry, and brain structure that mirror aspects of schizophrenia pathology. We also further explored the role of monoaminergic signaling in NP and the effects of isolation rearing by challenging both socially reared and isolation-reared rats with D-amphetamine during the NP task. Although fewer isolation-reared animals learned the complex NP task, those that learned exhibited unaffected NP compared with socially reared rats. Consistent with previous reports, D-amphetamine impaired NP and increased motor impulsivity in socially reared rats. In contrast, D-amphetamine did not affect NP or motor impulsivity in isolation-reared rats. These data confirm a monoaminergic influence on NP behavior and indicate that rats reared in isolation have altered dopaminergic sensitivity.
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Oliveras I, Sánchez-González A, Piludu MA, Gerboles C, Río-Álamos C, Tobeña A, Fernández-Teruel A. Divergent effects of isolation rearing on prepulse inhibition, activity, anxiety and hippocampal-dependent memory in Roman high- and low-avoidance rats: A putative model of schizophrenia-relevant features. Behav Brain Res 2016; 314:6-15. [PMID: 27478139 DOI: 10.1016/j.bbr.2016.07.047] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Revised: 07/25/2016] [Accepted: 07/28/2016] [Indexed: 01/14/2023]
Abstract
Social isolation of rats induces a constellation of behavioral alterations known as "isolation syndrome" that are consistent with some of the positive and cognitive symptoms observed in schizophrenic patients. In the present study we have assessed whether isolation rearing of inbred Roman high-avoidance (RHA-I) and Roman low-avoidance (RLA-I) strains can lead to the appearance of some of the key features of the "isolation syndrome", such as prepulse inhibition (PPI) deficits, increased anxious behavior, hyperactivity and memory/learning impairments. Compared to RLA-I rats, the results show that isolation rearing (IR) in RHA-I rats has a more profound impact, as they exhibit isolation-induced PPI deficits, increased anxiety, hyperactivity and long-term reference memory deficits, while isolated RLA-I rats only exhibit deficits in a spatial working memory task. These results give further support to the validity of RHA-I rats as a genetically-based model of schizophrenia relevant-symptoms.
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Affiliation(s)
- Ignasi Oliveras
- Medical Psychology Unit, Department of Psychiatry and Forensic Medicine, School of Medicine, Institute of Neurosciences, Autonomous University of Barcelona 08193-Bellaterra, Barcelona, Spain.
| | - Ana Sánchez-González
- Medical Psychology Unit, Department of Psychiatry and Forensic Medicine, School of Medicine, Institute of Neurosciences, Autonomous University of Barcelona 08193-Bellaterra, Barcelona, Spain
| | - Maria Antonietta Piludu
- Department of Life and Environmental Sciences, Section of Pharmaceutical, Pharmacological and Nutraceutical Sciences, University of Cagliari, 09124 Cagliari, Italy
| | - Cristina Gerboles
- Medical Psychology Unit, Department of Psychiatry and Forensic Medicine, School of Medicine, Institute of Neurosciences, Autonomous University of Barcelona 08193-Bellaterra, Barcelona, Spain
| | - Cristóbal Río-Álamos
- Medical Psychology Unit, Department of Psychiatry and Forensic Medicine, School of Medicine, Institute of Neurosciences, Autonomous University of Barcelona 08193-Bellaterra, Barcelona, Spain
| | - Adolf Tobeña
- Medical Psychology Unit, Department of Psychiatry and Forensic Medicine, School of Medicine, Institute of Neurosciences, Autonomous University of Barcelona 08193-Bellaterra, Barcelona, Spain
| | - Alberto Fernández-Teruel
- Medical Psychology Unit, Department of Psychiatry and Forensic Medicine, School of Medicine, Institute of Neurosciences, Autonomous University of Barcelona 08193-Bellaterra, Barcelona, Spain.
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Ng E, Browne CJ, Samsom JN, Wong AHC. Depression and substance use comorbidity: What we have learned from animal studies. THE AMERICAN JOURNAL OF DRUG AND ALCOHOL ABUSE 2016; 43:456-474. [PMID: 27315335 DOI: 10.1080/00952990.2016.1183020] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Depression and substance use disorders are often comorbid, but the reasons for this are unclear. In human studies, it is difficult to determine how one disorder may affect predisposition to the other and what the underlying mechanisms might be. Instead, animal studies allow experimental induction of behaviors relevant to depression and drug-taking, and permit direct interrogation of changes to neural circuits and molecular pathways. While this field is still new, here we review animal studies that investigate whether depression-like states increase vulnerability to drug-taking behaviors. Since chronic psychosocial stress can precipitate or predispose to depression in humans, we review studies that use psychosocial stressors to produce depression-like phenotypes in animals. Specifically, we describe how postweaning isolation stress, repeated social defeat stress, and chronic mild (or unpredictable) stress affect behaviors relevant to substance abuse, especially operant self-administration. Potential brain changes mediating these effects are also discussed where available, with an emphasis on mesocorticolimbic dopamine circuits. Postweaning isolation stress and repeated social defeat generally increase acquisition or maintenance of drug self-administration, and alter dopamine sensitivity in various brain regions. However, the effects of chronic mild stress on drug-taking have been much less studied. Future studies should consider standardizing stress-induction protocols, including female subjects, and using multi-hit models (e.g. genetic vulnerabilities and environmental stress).
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Affiliation(s)
- Enoch Ng
- a Lunenfeld-Tanenbaum Research Institute , Mount Sinai Hospital , Toronto , Canada.,b Institute of Medical Science, University of Toronto , Toronto , Canada
| | - Caleb J Browne
- c Department of Psychology , University of Toronto , Toronto , Canada.,d Campbell Family Health Institute , Centre for Addiction and Mental Health , Toronto , Canada
| | - James N Samsom
- d Campbell Family Health Institute , Centre for Addiction and Mental Health , Toronto , Canada.,e Department of Pharmacology , University of Toronto , Toronto , Canada
| | - Albert H C Wong
- b Institute of Medical Science, University of Toronto , Toronto , Canada.,d Campbell Family Health Institute , Centre for Addiction and Mental Health , Toronto , Canada.,e Department of Pharmacology , University of Toronto , Toronto , Canada.,f Department of Psychiatry , University of Toronto , Toronto , Canada
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Lee H, Won H, Im J, Kim YO, Lee S, Cho IH, Kim HK, Kwon JT, Kim HJ. Effect of Valeriana fauriei extract on the offspring of adult rats exposed to prenatal stress. Int J Mol Med 2016; 38:251-8. [PMID: 27220809 DOI: 10.3892/ijmm.2016.2589] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Accepted: 04/20/2016] [Indexed: 11/06/2022] Open
Abstract
Exposing a pregnant female to stress is a risk factor for the development of psychiatric disorders in the offspring. In the present study, we examined the effects of an extract of Valeriana fauriei (VF) root (100 mg/kg/day, administered on postnatal days 35-56) on behavioral patterns as well as protein expression in the prefrontal cortex of the offspring of prenatally-stressed rats. Modified behavioral tests, including the forced swim test, the open field test, a social interaction test and the prepulse inhibition test were performed and many of the parameters were found to decrease in the offspring of the rats exposed to PNS compared with the offspring of the non-stressed rats. Western blot and immunohistochemical analyses of the prefrontal cortex revealed that the downregulation of several neurodevelopmental proteins in the offspring of rats dams exposed to PNS was reversed after treatment with VF extract. These findings demonstrate that the downregulation of several proteins in the prefrontal cortex of the offspring of prenatally‑stressed rats may be associated with subsequent behavioral changes, and that these phenomena recovered following VF treatment. Our results suggest that VF decreases the incidence of prenatal stress related-psychiatric disorders, such as depression and schizophrenia.
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Affiliation(s)
- Hwayoung Lee
- Department of Clinical Pharmacology, College of Medicine, Soonchunhyang University, Cheonan, Republic of Korea
| | - Hansol Won
- Department of Clinical Pharmacology, College of Medicine, Soonchunhyang University, Cheonan, Republic of Korea
| | - Jiyun Im
- Department of Clinical Pharmacology, College of Medicine, Soonchunhyang University, Cheonan, Republic of Korea
| | - Young Ock Kim
- Development of Ginseng and Medical Plants Research Institute, Rural Administration, Eumseong, Republic of Korea
| | - Sanghyun Lee
- Department of Integrative Plant Science, Chung-Ang University, Anseong, Republic of Korea
| | - Ik-Hyun Cho
- Department of Convergence Medical Science and Brain Korea 21 Plus Program, Institute of Korean Medicine, College of Oriental Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Hyung-Ki Kim
- Department of Clinical Pharmacology, College of Medicine, Soonchunhyang University, Cheonan, Republic of Korea
| | - Jun-Tack Kwon
- Department of Clinical Pharmacology, College of Medicine, Soonchunhyang University, Cheonan, Republic of Korea
| | - Hak-Jae Kim
- Department of Clinical Pharmacology, College of Medicine, Soonchunhyang University, Cheonan, Republic of Korea
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Powell SB, Swerdlow NR. Social Isolation Rearing and Sensorimotor Gating in Rat Models of Relevance to Schizophrenia. HANDBOOK OF BEHAVIORAL NEUROSCIENCE 2016. [DOI: 10.1016/b978-0-12-800981-9.00009-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Kuchiiwa T, Kuchiiwa S. Evaluation of aggressiveness of female mice using a semi-automated apparatus for measurement of aggressive biting behavior toward an inanimate object. J Neurosci Methods 2016; 257:179-84. [DOI: 10.1016/j.jneumeth.2015.10.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Revised: 10/09/2015] [Accepted: 10/11/2015] [Indexed: 10/22/2022]
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48
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O'Connor WT, O'Shea SD. Clozapine and GABA transmission in schizophrenia disease models. Pharmacol Ther 2015; 150:47-80. [DOI: 10.1016/j.pharmthera.2015.01.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Accepted: 01/06/2015] [Indexed: 11/30/2022]
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Samsom JN, Wong AHC. Schizophrenia and Depression Co-Morbidity: What We have Learned from Animal Models. Front Psychiatry 2015; 6:13. [PMID: 25762938 PMCID: PMC4332163 DOI: 10.3389/fpsyt.2015.00013] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Accepted: 01/24/2015] [Indexed: 12/15/2022] Open
Abstract
Patients with schizophrenia are at an increased risk for the development of depression. Overlap in the symptoms and genetic risk factors between the two disorders suggests a common etiological mechanism may underlie the presentation of comorbid depression in schizophrenia. Understanding these shared mechanisms will be important in informing the development of new treatments. Rodent models are powerful tools for understanding gene function as it relates to behavior. Examining rodent models relevant to both schizophrenia and depression reveals a number of common mechanisms. Current models which demonstrate endophenotypes of both schizophrenia and depression are reviewed here, including models of CUB and SUSHI multiple domains 1, PDZ and LIM domain 5, glutamate Delta 1 receptor, diabetic db/db mice, neuropeptide Y, disrupted in schizophrenia 1, and its interacting partners, reelin, maternal immune activation, and social isolation. Neurotransmission, brain connectivity, the immune system, the environment, and metabolism emerge as potential common mechanisms linking these models and potentially explaining comorbid depression in schizophrenia.
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Affiliation(s)
- James N Samsom
- Department of Molecular Neuroscience, Centre for Addiction and Mental Health, Campbell Family Mental Health Research Institute , Toronto, ON , Canada ; Department of Pharmacology, Faculty of Medicine, University of Toronto , Toronto, ON , Canada
| | - Albert H C Wong
- Department of Molecular Neuroscience, Centre for Addiction and Mental Health, Campbell Family Mental Health Research Institute , Toronto, ON , Canada ; Department of Pharmacology, Faculty of Medicine, University of Toronto , Toronto, ON , Canada ; Department of Psychiatry, Faculty of Medicine, University of Toronto , Toronto, ON , Canada
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Sadowski RN, Wise LM, Park PY, Schantz SL, Juraska JM. Early exposure to bisphenol A alters neuron and glia number in the rat prefrontal cortex of adult males, but not females. Neuroscience 2014; 279:122-31. [PMID: 25193849 DOI: 10.1016/j.neuroscience.2014.08.038] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Revised: 07/30/2014] [Accepted: 08/25/2014] [Indexed: 11/26/2022]
Abstract
Previous work has shown that exposure to bisphenol A (BPA) during early development can alter sexual differentiation of the brain in rodents, although few studies have examined effects on areas of the brain associated with cognition. The current study examined if developmental BPA exposure alters the total number of neurons and glia in the medial prefrontal cortex (mPFC) in adulthood. Pregnant Long-Evans rats were orally exposed to 0, 4, 40, or 400-μg/kg BPA in corn oil throughout pregnancy. From postnatal days 1 to 9, pups were given daily oral doses of oil or BPA, at doses corresponding to those given during gestation. Brains were examined in adulthood, and the volume of layers 2/3 and layers 5/6 of the mPFC was parcellated. The density of neurons and glia in these layers was quantified stereologically with the optical disector, and density was multiplied by volume for each animal. Males exposed to 400-μg/kg BPA were found to have increased numbers of neurons and glia in layers 5/6. Although there were no significant effects of BPA in layers 2/3, the pattern of increased neuron number in males exposed to 400-μg/kg BPA was similar to that seen in layers 5/6. No effects of BPA were seen in females or in males exposed to the other doses of BPA. This study indicates that males are more susceptible to the long-lasting effects of BPA on anatomy of the mPFC, an area implicated in neurological disorders.
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Affiliation(s)
- R N Sadowski
- Neuroscience Program, University of Illinois at Urbana-Champaign, Champaign, IL 61820, United States
| | - L M Wise
- Department of Psychology, University of Illinois at Urbana-Champaign, Champaign, IL 61820, United States
| | - P Y Park
- Department of Psychology, University of Illinois at Urbana-Champaign, Champaign, IL 61820, United States
| | - S L Schantz
- Neuroscience Program, University of Illinois at Urbana-Champaign, Champaign, IL 61820, United States; Department of Comparative Biosciences, University of Illinois at Urbana-Champaign, Champaign, IL 61820, United States
| | - J M Juraska
- Neuroscience Program, University of Illinois at Urbana-Champaign, Champaign, IL 61820, United States; Department of Psychology, University of Illinois at Urbana-Champaign, Champaign, IL 61820, United States.
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