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Zwir I, Del-Val C, Arnedo J, Pulkki-Råback L, Konte B, Yang SS, Romero-Zaliz R, Hintsanen M, Cloninger KM, Garcia D, Svrakic DM, Lester N, Rozsa S, Mesa A, Lyytikäinen LP, Giegling I, Kähönen M, Martinez M, Seppälä I, Raitoharju E, de Erausquin GA, Mamah D, Raitakari O, Rujescu D, Postolache TT, Gu CC, Sung J, Lehtimäki T, Keltikangas-Järvinen L, Cloninger CR. Three genetic-environmental networks for human personality. Mol Psychiatry 2021; 26:3858-3875. [PMID: 31748689 PMCID: PMC8550959 DOI: 10.1038/s41380-019-0579-x] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 09/26/2019] [Accepted: 10/24/2019] [Indexed: 02/07/2023]
Abstract
Phylogenetic, developmental, and brain-imaging studies suggest that human personality is the integrated expression of three major systems of learning and memory that regulate (1) associative conditioning, (2) intentionality, and (3) self-awareness. We have uncovered largely disjoint sets of genes regulating these dissociable learning processes in different clusters of people with (1) unregulated temperament profiles (i.e., associatively conditioned habits and emotional reactivity), (2) organized character profiles (i.e., intentional self-control of emotional conflicts and goals), and (3) creative character profiles (i.e., self-aware appraisal of values and theories), respectively. However, little is known about how these temperament and character components of personality are jointly organized and develop in an integrated manner. In three large independent genome-wide association studies from Finland, Germany, and Korea, we used a data-driven machine learning method to uncover joint phenotypic networks of temperament and character and also the genetic networks with which they are associated. We found three clusters of similar numbers of people with distinct combinations of temperament and character profiles. Their associated genetic and environmental networks were largely disjoint, and differentially related to distinct forms of learning and memory. Of the 972 genes that mapped to the three phenotypic networks, 72% were unique to a single network. The findings in the Finnish discovery sample were blindly and independently replicated in samples of Germans and Koreans. We conclude that temperament and character are integrated within three disjoint networks that regulate healthy longevity and dissociable systems of learning and memory by nearly disjoint sets of genetic and environmental influences.
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Grants
- Spanish Ministry of Science and Technology TIN2012-38805 and DPI2015-69585-R
- The Young Finns Study has been financially supported by the Academy of Finland: grants 286284, 134309 (Eye), 126925, 121584, 124282, 129378 (Salve), 117787 (Gendi), 41071 (Skidi), and 308676; the Social Insurance Institution of Finland; Competitive State Research Financing of the Expert Responsibility area of Kuopio, Tampere and Turku University Hospitals (grant X51001); Juho Vainio Foundation; Paavo Nurmi Foundation; Finnish Foundation for Cardiovascular Research ; Finnish Cultural Foundation; Tampere Tuberculosis Foundation; Emil Aaltonen Foundation; Yrjö Jahnsson Foundation; Signe and Ane Gyllenberg Foundation; Diabetes Research Foundation of Finnish Diabetes Association: and EU Horizon 2020 (grant 755320 for TAXINOMISIS).
- American Federation for Suicide Prevention
- Healthy Twin Family Register of Korea
- Anthropedia Foundation
- The Young Finns Study has been financially supported by the Academy of Finland: grants 286284, 322098, 134309 (Eye), 126925, 121584, 124282, 129378 (Salve), 117787 (Gendi), 41071 (Skidi), and 308676; the Social Insurance Institution of Finland; Competitive State Research Financing of the Expert Responsibility area of Kuopio, Tampere and Turku University Hospitals (grant X51001); Juho Vainio Foundation; Paavo Nurmi Foundation; Finnish Foundation for Cardiovascular Research ; Finnish Cultural Foundation; Tampere Tuberculosis Foundation; Emil Aaltonen Foundation; Yrjö Jahnsson Foundation; Signe and Ane Gyllenberg Foundation; Diabetes Research Foundation of Finnish Diabetes Association: and EU Horizon 2020 (grant 755320 for TAXINOMISIS); and Tampere University Hospital Supporting Foundation.
- American Society for Suicide Prevention
- American Foundation for Suicide Prevention
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Affiliation(s)
- Igor Zwir
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO, USA
- Department of Computer Science, University of Granada, Granada, Spain
| | - Coral Del-Val
- Department of Computer Science, University of Granada, Granada, Spain
| | - Javier Arnedo
- Department of Computer Science, University of Granada, Granada, Spain
| | - Laura Pulkki-Råback
- Department of Psychology and Logopedics, University of Helsinki, Helsinki, Finland
| | - Bettina Konte
- Department of Psychiatry, Martin-Luther-University Halle-Wittenberg, Halle, Germany
| | - Sarah S Yang
- Department of Epidemiology, and Institute of Health and Environment, School of Public Health, Seoul National University, Seoul, Korea
| | | | - Mirka Hintsanen
- Unit of Psychology, Faculty of Education, University of Oulu, Oulu, Finland
| | | | - Danilo Garcia
- Department of Psychology, University of Gothenburg, Gothenburg, Sweden
- Blekinge Centre of Competence, Blekinge County Council, Karlskrona, Sweden
| | - Dragan M Svrakic
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO, USA
| | - Nigel Lester
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO, USA
| | - Sandor Rozsa
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO, USA
| | - Alberto Mesa
- Department of Computer Science, University of Granada, Granada, Spain
| | - Leo-Pekka Lyytikäinen
- Department of Clinical Chemistry, Fimlab Laboratories, and Finnish Cardiovascular Research Center-Tampere, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Ina Giegling
- Department of Psychiatry, Martin-Luther-University Halle-Wittenberg, Halle, Germany
- University Clinic, Ludwig-Maximilian University, Munich, Germany
| | - Mika Kähönen
- Department of Clinical Physiology Tampere University Hospital, and Finnish Cardiovascular Research Center-Tampere, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Maribel Martinez
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO, USA
| | - Ilkka Seppälä
- Department of Clinical Chemistry, Fimlab Laboratories, and Finnish Cardiovascular Research Center-Tampere, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Emma Raitoharju
- Department of Clinical Chemistry, Fimlab Laboratories, and Finnish Cardiovascular Research Center-Tampere, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Gabriel A de Erausquin
- The Glenn Biggs Institute of Alzheimer's and Neurodegenerative Disorders, Long School of Medicine, University of Texas Heath San Antonio, San Antonio, TX, USA
| | - Daniel Mamah
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO, USA
| | - Olli Raitakari
- Department of Clinical Physiology and Nuclear Medicine, Turku University Hospital, Turku, Finland
- Centre for Population Health Research, Turku University Hospital, University of Turku Hospital, Turku, Finland
- Research Centre of Applied and Preventive Cardiovascular Medicine, University of Turku, Turku, Finland
| | - Dan Rujescu
- Department of Psychiatry, Martin-Luther-University Halle-Wittenberg, Halle, Germany
| | - Teodor T Postolache
- Department of Psychiatry, School of Medicine, University of Maryland, Baltimore, MD, USA
- Rocky Mountain Mental Illness, Research, Education, and Clinical Center for Veteran Suicide Prevention, Denver, CO, USA
| | - C Charles Gu
- Division of Biostatistics, School of Medicine, Washington University, St. Louis, MO, USA
| | - Joohon Sung
- Department of Epidemiology, and Institute of Health and Environment, School of Public Health, Seoul National University, Seoul, Korea
| | - Terho Lehtimäki
- Department of Clinical Chemistry, Fimlab Laboratories, and Finnish Cardiovascular Research Center-Tampere, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | | | - C Robert Cloninger
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO, USA.
- Department of Psychological and Brain Sciences, and School of Medicine, Department of Genetics, School of Arts and Sciences, Washington University, St. Louis, MO, USA.
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2
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Jiang N, Wang K, Zhang Y, Huang H, Lv JW, Wang Q, Wang HX, Xia TJ, Liu XM. Protective effect of ginsenoside Rb1 against chronic restraint stress (CRS)-induced memory impairments in rats. Behav Brain Res 2021; 405:113146. [PMID: 33545198 DOI: 10.1016/j.bbr.2021.113146] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 01/21/2021] [Accepted: 01/23/2021] [Indexed: 12/13/2022]
Abstract
Ginsenoside Rb1 (Rb1) is one of the most active components found in ginseng and provides important benefits to the central nervous system, especially for the improvement of learning and memory. Previous studies demonstrated that Rb1 protected against scopolamine-induced amnesia and exhibited memory-enhancing effects in the SAMP8 mouse model. However, the effects of Rb1 against chronic restraint stress (CRS)-induced cognitive impairments, especially the role of Rg1 on the performance of reward directed instrumental conditioning have not been investigated. In this study, rats were subjected to CRS (6 h/day) for 28 days. Thereafter, behavioural tests including reward-directed instrumental conditioning task (RICT) and the Morris water maze (MWM) task were conducted. Administered of Rb1 (6.75 and 13.5 mg/kg, i.p.) remarkably ameliorated the memory impairments caused by CRS as evident from the results of RICT and MWM task, and this effect was accompanied by noticeable alterations in the levels of oxidative markers (superoxide dismutase, catalase, and lipid peroxidation) in the hippocampus. Additionally, Rb1 reduced the ratio of Bax:Bcl-2 and the expression of cleaved caspase-3 and cleaved caspase-9, increased the levels of synaptophysin (SYP) and postsynaptic density 95 (PSD95) and activated the BDNF/TrkB pathway in the hippocampus. In summary, the present study demonstrated that Rb1 rescues cognitive deficits induced by CRS is partially mediated by antagonizing oxidative stress and apoptosis, improving synaptic plasticity and restoring the BDNF/TrkB signalling pathway. This newly discovered effect of Rb1 sheds light on its applications in the development of therapeutic interventions to alleviate the deleterious effects of chronic stress.
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Affiliation(s)
- Ning Jiang
- Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Kezhu Wang
- Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Yiwen Zhang
- Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Hong Huang
- Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Jing-Wei Lv
- Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Qiong Wang
- Affiliated TCM Hospital/School of Pharmacy/Sino-Portugal TCM International Cooperation Center, Southwest Medical University, Luzhou, 646000, China
| | - Hai-Xia Wang
- Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Tian-Ji Xia
- Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Xin-Min Liu
- Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China; Affiliated TCM Hospital/School of Pharmacy/Sino-Portugal TCM International Cooperation Center, Southwest Medical University, Luzhou, 646000, China.
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Zwir I, Arnedo J, Del-Val C, Pulkki-Råback L, Konte B, Yang SS, Romero-Zaliz R, Hintsanen M, Cloninger KM, Garcia D, Svrakic DM, Rozsa S, Martinez M, Lyytikäinen LP, Giegling I, Kähönen M, Hernandez-Cuervo H, Seppälä I, Raitoharju E, de Erausquin GA, Raitakari O, Rujescu D, Postolache TT, Sung J, Keltikangas-Järvinen L, Lehtimäki T, Cloninger CR. Uncovering the complex genetics of human temperament. Mol Psychiatry 2020; 25:2275-2294. [PMID: 30279457 PMCID: PMC7515831 DOI: 10.1038/s41380-018-0264-5] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Revised: 07/21/2018] [Accepted: 08/15/2018] [Indexed: 11/11/2022]
Abstract
Experimental studies of learning suggest that human temperament may depend on the molecular mechanisms for associative conditioning, which are highly conserved in animals. The main genetic pathways for associative conditioning are known in experimental animals, but have not been identified in prior genome-wide association studies (GWAS) of human temperament. We used a data-driven machine learning method for GWAS to uncover the complex genotypic-phenotypic networks and environmental interactions related to human temperament. In a discovery sample of 2149 healthy Finns, we identified sets of single-nucleotide polymorphisms (SNPs) that cluster within particular individuals (i.e., SNP sets) regardless of phenotype. Second, we identified 3 clusters of people with distinct temperament profiles measured by the Temperament and Character Inventory regardless of genotype. Third, we found 51 SNP sets that identified 736 gene loci and were significantly associated with temperament. The identified genes were enriched in pathways activated by associative conditioning in animals, including the ERK, PI3K, and PKC pathways. 74% of the identified genes were unique to a specific temperament profile. Environmental influences measured in childhood and adulthood had small but significant effects. We confirmed the replicability of the 51 Finnish SNP sets in healthy Korean (90%) and German samples (89%), as well as their associations with temperament. The identified SNPs explained nearly all the heritability expected in each sample (37-53%) despite variable cultures and environments. We conclude that human temperament is strongly influenced by more than 700 genes that modulate associative conditioning by molecular processes for synaptic plasticity and long-term memory.
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Affiliation(s)
- Igor Zwir
- grid.4367.60000 0001 2355 7002Department of Psychiatry, Washington University School of Medicine, St. Louis, MO USA ,grid.4489.10000000121678994Department of Computer Science, University of Granada, Granada, Spain
| | - Javier Arnedo
- grid.4367.60000 0001 2355 7002Department of Psychiatry, Washington University School of Medicine, St. Louis, MO USA ,grid.4489.10000000121678994Department of Computer Science, University of Granada, Granada, Spain
| | - Coral Del-Val
- grid.4489.10000000121678994Department of Computer Science, University of Granada, Granada, Spain
| | - Laura Pulkki-Råback
- grid.7737.40000 0004 0410 2071Department of Psychology and Logopedics, University of Helsinki, Helsinki, Finland
| | - Bettina Konte
- grid.9018.00000 0001 0679 2801Department of Psychiatry, Martin-Luther-University Halle-Wittenberg, Halle, Germany
| | - Sarah S. Yang
- grid.31501.360000 0004 0470 5905Department of Epidemiology, School of Public Health, Institute of Health and Environment, Seoul National University, Seoul, Korea
| | - Rocio Romero-Zaliz
- grid.4489.10000000121678994Department of Computer Science, University of Granada, Granada, Spain
| | - Mirka Hintsanen
- grid.10858.340000 0001 0941 4873Unit of Psychology, Faculty of Education, University of Oulu, Oulu, Finland
| | | | - Danilo Garcia
- grid.8761.80000 0000 9919 9582Department of Psychology, University of Gothenburg, Gothenburg, Sweden ,grid.435885.70000 0001 0597 1381Blekinge Centre of Competence, Blekinge County Council, Karlskrona, Sweden
| | - Dragan M. Svrakic
- grid.4367.60000 0001 2355 7002Department of Psychiatry, Washington University School of Medicine, St. Louis, MO USA
| | - Sandor Rozsa
- grid.4367.60000 0001 2355 7002Department of Psychiatry, Washington University School of Medicine, St. Louis, MO USA
| | - Maribel Martinez
- grid.4367.60000 0001 2355 7002Department of Psychiatry, Washington University School of Medicine, St. Louis, MO USA
| | - Leo-Pekka Lyytikäinen
- grid.502801.e0000 0001 2314 6254Fimlab Laboratories, Department of Clinical Chemistry, Faculty of Medicine and Life Sciences, Finnish Cardiovascular Research Center-Tampere, University of Tampere, Tampere, Finland
| | - Ina Giegling
- grid.9018.00000 0001 0679 2801Department of Psychiatry, Martin-Luther-University Halle-Wittenberg, Halle, Germany ,grid.5252.00000 0004 1936 973XUniversity Clinic, Ludwig-Maximilian University, Munich, Germany
| | - Mika Kähönen
- grid.502801.e0000 0001 2314 6254Department of Clinical Physiology, Faculty of Medicine and Life Sciences, Tampere University Hospital, University of Tampere, Tampere, Finland
| | - Helena Hernandez-Cuervo
- grid.170693.a0000 0001 2353 285XDepartment of Psychiatry and Neurosurgery, University of South Florida, Tampa, FL USA
| | - Ilkka Seppälä
- grid.502801.e0000 0001 2314 6254Fimlab Laboratories, Department of Clinical Chemistry, Faculty of Medicine and Life Sciences, Finnish Cardiovascular Research Center-Tampere, University of Tampere, Tampere, Finland
| | - Emma Raitoharju
- grid.502801.e0000 0001 2314 6254Fimlab Laboratories, Department of Clinical Chemistry, Faculty of Medicine and Life Sciences, Finnish Cardiovascular Research Center-Tampere, University of Tampere, Tampere, Finland
| | - Gabriel A. de Erausquin
- grid.449717.80000 0004 5374 269XDepartment of Psychiatry and Neurology, Institute of Neurosciences, University of Texas Rio-Grande Valley School of Medicine, Harlingen, TX USA
| | - Olli Raitakari
- grid.410552.70000 0004 0628 215XDepartment of Clinical Physiology and Nuclear Medicine, Turku University Hospital, Turku, Finland
| | - Dan Rujescu
- grid.9018.00000 0001 0679 2801Department of Psychiatry, Martin-Luther-University Halle-Wittenberg, Halle, Germany
| | - Teodor T. Postolache
- grid.411024.20000 0001 2175 4264Department of Psychiatry, University of Maryland School of Medicine, Baltimore, MD USA ,Rocky Mountain Mental Illness, Research, Education and Clinical Center for Veteran Suicide Prevention, Denver, CO USA
| | - Joohon Sung
- grid.31501.360000 0004 0470 5905Department of Epidemiology, School of Public Health, Institute of Health and Environment, Seoul National University, Seoul, Korea
| | - Liisa Keltikangas-Järvinen
- grid.7737.40000 0004 0410 2071Department of Psychology and Logopedics, University of Helsinki, Helsinki, Finland
| | - Terho Lehtimäki
- grid.502801.e0000 0001 2314 6254Fimlab Laboratories, Department of Clinical Chemistry, Faculty of Medicine and Life Sciences, Finnish Cardiovascular Research Center-Tampere, University of Tampere, Tampere, Finland
| | - C. Robert Cloninger
- grid.4367.60000 0001 2355 7002Department of Psychiatry, Washington University School of Medicine, St. Louis, MO USA ,grid.4367.60000 0001 2355 7002Department of Psychological and Brain Sciences, School of Arts and Sciences, and Department of Genetics, School of Medicine, Washington University School of Medicine, St. Louis, MO USA
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4
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Cloninger CR, Cloninger KM, Zwir I, Keltikangas-Järvinen L. The complex genetics and biology of human temperament: a review of traditional concepts in relation to new molecular findings. Transl Psychiatry 2019; 9:290. [PMID: 31712636 PMCID: PMC6848211 DOI: 10.1038/s41398-019-0621-4] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 09/25/2019] [Accepted: 10/18/2019] [Indexed: 12/14/2022] Open
Abstract
Recent genome-wide association studies (GWAS) have shown that temperament is strongly influenced by more than 700 genes that modulate associative conditioning by molecular processes for synaptic plasticity and long-term learning and memory. The results were replicated in three independent samples despite variable cultures and environments. The identified genes were enriched in pathways activated by behavioral conditioning in animals, including the two major molecular pathways for response to extracellular stimuli, the Ras-MEK-ERK and the PI3K-AKT-mTOR cascades. These pathways are activated by a wide variety of physiological and psychosocial stimuli that vary in positive and negative valence and in consequences for health and survival. Changes in these pathways are orchestrated to maintain cellular homeostasis despite changing conditions by modulating temperament and its circadian and seasonal rhythms. In this review we first consider traditional concepts of temperament in relation to the new genetic findings by examining the partial overlap of alternative measures of temperament. Then we propose a definition of temperament as the disposition of a person to learn how to behave, react emotionally, and form attachments automatically by associative conditioning. This definition provides necessary and sufficient criteria to distinguish temperament from other aspects of personality that become integrated with it across the life span. We describe the effects of specific stimuli on the molecular processes underlying temperament from functional, developmental, and evolutionary perspectives. Our new knowledge can improve communication among investigators, increase the power and efficacy of clinical trials, and improve the effectiveness of treatment of personality and its disorders.
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Affiliation(s)
- C Robert Cloninger
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO, USA.
- School of Arts and Sciences, Department of Psychological and Brain Sciences, and School of Medicine, Department of Genetics, Washington University, St. Louis, MO, USA.
- Anthropedia Foundation, St. Louis, MO, USA.
| | | | - Igor Zwir
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO, USA
- Department of Computer Science, University of Granada, Granada, Spain
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5
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Sauvage M, Kitsukawa T, Atucha E. Single-cell memory trace imaging with immediate-early genes. J Neurosci Methods 2019; 326:108368. [DOI: 10.1016/j.jneumeth.2019.108368] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 07/15/2019] [Accepted: 07/17/2019] [Indexed: 11/29/2022]
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6
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Williams-Simon PA, Posey C, Mitchell S, Ng'oma E, Mrkvicka JA, Zars T, King EG. Multiple genetic loci affect place learning and memory performance in Drosophila melanogaster. GENES, BRAIN, AND BEHAVIOR 2019; 18:e12581. [PMID: 31095869 PMCID: PMC6718298 DOI: 10.1111/gbb.12581] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 05/11/2019] [Accepted: 05/13/2019] [Indexed: 12/25/2022]
Abstract
Learning and memory are critical functions for all animals, giving individuals the ability to respond to changes in their environment. Within populations, individuals vary, however the mechanisms underlying this variation in performance are largely unknown. Thus, it remains to be determined what genetic factors cause an individual to have high learning ability and what factors determine how well an individual will remember what they have learned. To genetically dissect learning and memory performance, we used the Drosophila synthetic population resource (DSPR), a multiparent mapping resource in the model system Drosophila melanogaster, consisting of a large set of recombinant inbred lines (RILs) that naturally vary in these and other traits. Fruit flies can be trained in a "heat box" to learn to remain on one side of a chamber (place learning) and can remember this (place memory) over short timescales. Using this paradigm, we measured place learning and memory for ~49 000 individual flies from over 700 DSPR RILs. We identified 16 different loci across the genome that significantly affect place learning and/or memory performance, with 5 of these loci affecting both traits. To identify transcriptomic differences associated with performance, we performed RNA-Seq on pooled samples of seven high performing and seven low performing RILs for both learning and memory and identified hundreds of genes with differences in expression in the two sets. Integrating our transcriptomic results with the mapping results allowed us to identify nine promising candidate genes, advancing our understanding of the genetic basis underlying natural variation in learning and memory performance.
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Affiliation(s)
| | - Christopher Posey
- Division of Biological Sciences, University of Missouri, Columbia, Missouri
| | - Samuel Mitchell
- Division of Biological Sciences, University of Missouri, Columbia, Missouri
| | - Enoch Ng'oma
- Division of Biological Sciences, University of Missouri, Columbia, Missouri
| | - James A Mrkvicka
- Division of Biological Sciences, University of Missouri, Columbia, Missouri
| | - Troy Zars
- Division of Biological Sciences, University of Missouri, Columbia, Missouri
| | - Elizabeth G King
- Division of Biological Sciences, University of Missouri, Columbia, Missouri
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7
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Horton KKA, Goonawardena AV, Sesay J, Howlett AC, Hampson RE. Systemic Blockade of the CB 1 Receptor Augments Hippocampal Gene Expression Involved in Synaptic Plasticity but Perturbs Hippocampus-Dependent Learning Task. Cannabis Cannabinoid Res 2019; 4:33-41. [PMID: 31032421 DOI: 10.1089/can.2018.0061] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Chronic and acute agonism as well as acute antagonism of CB1 receptors reveal modulation of learning and memory during stable performance of a delayed-nonmatch-to-sample (DNMS) memory task. However, it remains unclear how chronic blockade of the CB1 receptor alters acquisition of the behavioral task. We examined the effects of chronic rimonabant exposure during DNMS task acquisition to determine if blockade of the CB1 receptor with the antagonist rimonabant enhanced acquisition of operant task. Long-Evans rats, trained in the DNMS task before imposition of the trial delay, were surgically implanted with osmotic mini pumps to administer rimonabant (1.0 mg/kg/day) or vehicle (dimethyl sulfoxide/Tween-80/Saline). Following surgical recovery, DNMS training was resumed with the imposition of gradually longer delays (1-30 sec). The number of days required to achieve stable performance with either increasing length of delay or reversal of task contingency was compared between vehicle and rimonabant-treated rats. Following the completion of DNMS training, animals were euthanized, and both hippocampi were harvested for gene expression assay analysis. Rimonabant treatment animals required more time to achieve stable DNMS performance than vehicle-treated controls. Quantitative real-time polymerase chain reaction analysis revealed that the expressions of alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor subunit, brain-derived neurotrophic factor, and synapsin 1 (Syn1) were significantly increased. These results are consistent with rimonabant increasing mRNAs for proteins associated with hippocampal synapse remodeling, but that those alterations did not necessarily accelerate the acquisition of an operant behavioral task that required learning new contingencies.
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Affiliation(s)
- Kofi-Kermit A Horton
- Department of Physiology and Pharmacology, Wake Forest University Health Sciences, Winston-Salem, North Carolina.,Division of Pulmonary, Critical Care and Sleep Medicine, Case Western Reserve University, Cleveland, Ohio
| | - Anushka V Goonawardena
- Department of Physiology and Pharmacology, Wake Forest University Health Sciences, Winston-Salem, North Carolina.,Biosciences Division, SRI International, Menlo Park, California
| | - John Sesay
- Department of Physiology and Pharmacology, Wake Forest University Health Sciences, Winston-Salem, North Carolina
| | - Allyn C Howlett
- Department of Physiology and Pharmacology, Wake Forest University Health Sciences, Winston-Salem, North Carolina
| | - Robert E Hampson
- Department of Physiology and Pharmacology, Wake Forest University Health Sciences, Winston-Salem, North Carolina
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8
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Passaro A, Soavi C, Marusic U, Rejc E, Sanz JM, Morieri ML, Nora ED, Kavcic V, Narici MV, Reggiani C, Biolo G, Zuliani G, Lazzer S, Pišot R. Computerized cognitive training and brain derived neurotrophic factor during bed rest: mechanisms to protect individual during acute stress. Aging (Albany NY) 2017; 9:393-407. [PMID: 28161695 PMCID: PMC5361671 DOI: 10.18632/aging.101166] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2016] [Accepted: 01/25/2017] [Indexed: 12/19/2022]
Abstract
Acute stress, as bed rest, was shown to increase plasma level of the neurotrophin brain-derived neurotrophic factor (BDNF) in older, but not in young adults. This increase might represent a protective mechanism towards acute insults in aging subjects. Since computerized cognitive training (CCT) is known to protect brain, herein we evaluated the effect of CCT during bed rest on BDNF, muscle mass, neuromuscular function and metabolic parameters. The subjects that underwent CCT did not show an increase of BDNF after bed rest, and showed an anti-insular modification pattern in metabolism. Neuromuscular function parameters, already shown to beneficiate from CCT, negatively correlated with BDNF in research participants undergoing CCT, while positively correlated in the control group. In conclusion, BDNF increase can be interpreted as a standardized protective mechanism taking place whenever an insult occurs; it gives low, but consistent preservation of neuromuscular function. CCT, acting as an external protective mechanism, seems to modify this standardized response, avoiding BDNF increase or possibly modifying its time course. Our results suggest the possibility of differential neuroprotective mechanisms among ill and healthy individuals, and the importance of timing in determining the effects of protective mechanisms.
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Affiliation(s)
- Angelina Passaro
- Medical Science Department, University of Ferrara, Ferrara 44121, Italy.,Co-first authors
| | - Cecilia Soavi
- Medical Science Department, University of Ferrara, Ferrara 44121, Italy.,Co-first authors
| | - Uros Marusic
- Science and Research Centre, University of Primorska, Koper 6000, Slovenia
| | - Enrico Rejc
- Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, KY 40202, USA
| | - Juana M Sanz
- Medical Science Department, University of Ferrara, Ferrara 44121, Italy
| | - Mario L Morieri
- Medical Science Department, University of Ferrara, Ferrara 44121, Italy
| | | | - Voyko Kavcic
- Institute of Gerontology, Wayne State University, Detroit, MI 48202, USA.,Biomedical Research and Innovative Society, Ljubljana 1000, Slovenia
| | - Marco V Narici
- School of Graduate Entry Medicine and Health, University of Nottingham, Derby DE22 3NE, UK
| | - Carlo Reggiani
- Department of Biomedical Sciences, University of Padua, Padua 35131 Italy
| | - Gianni Biolo
- Department of Medical, Surgical and Health Sciences, Division of Internal Medicine, University of Trieste, Trieste 34149, Italy
| | - Giovanni Zuliani
- Medical Science Department, University of Ferrara, Ferrara 44121, Italy
| | - Stefano Lazzer
- Department of Medical and Biological Sciences, University of Udine, Udine 33100, Italy.,School of Sport Sciences, University of Udine, Udine 33100, Italy
| | - Rado Pišot
- Science and Research Centre, University of Primorska, Koper 6000, Slovenia
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9
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Dopamine bioavailability in the mPFC modulates operant learning performance in rats: an experimental study with a computational interpretation. Behav Brain Res 2015; 280:92-100. [PMID: 25435314 DOI: 10.1016/j.bbr.2014.11.031] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Revised: 11/12/2014] [Accepted: 11/20/2014] [Indexed: 11/23/2022]
Abstract
Dopamine encodes reward and its prediction in reinforcement learning. Catechol-O-methyltransferase (COMT) activity in the medial prefrontal cortex (mPFC) has been shown to influence cognitive abilities by modifying dopamine clearance. Nevertheless, it is unknown how COMT in the mPFC influences operant learning. Systemic entacapone (50mg/kg), as well as local entacapone (3 pg) and recombinant COMT (17 μg) in the mPFC were administered to male Long Evans rats prior to training in an operant conditioning task. We found that systemic and local administration of the COMT inhibitor entacapone significantly improves learning performance. Conversely, recombinant COMT administration totally impaired learning. These data have been interpreted through a computational model where the phasic firing of dopaminergic neurons was computed by means of a temporal difference algorithm and dopamine bioavailability in the mPFC was simulated with a gating window. The duration of this window was selected to simulate the effects of inhibited or enhanced COMT activity (by entacapone or recombinant COMT respectively). The model accounts for an improved performance reproducing the entacapone effects, and a detrimental impact on learning when the clearance is increased reproducing the recombinant COMT effects. The experimental and computational results show that learning performance can be deeply influenced by COMT manipulations in the mPFC.
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10
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Shi Z, Chen L, Li S, Chen S, Sun X, Sun L, Li Y, Zeng J, He Y, Liu X. Chronic scopolamine-injection-induced cognitive deficit on reward-directed instrumental learning in rat is associated with CREB signaling activity in the cerebral cortex and dorsal hippocampus. Psychopharmacology (Berl) 2013; 230:245-60. [PMID: 23722831 DOI: 10.1007/s00213-013-3149-y] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2013] [Accepted: 05/12/2013] [Indexed: 12/19/2022]
Abstract
RATIONALE Scopolamine, a nonselective muscarinic receptor antagonist, has been used in experimental animal models of dementia. It has been demonstrated to disrupt performances in a battery of behavioral tests. However, no attempt has been made to determine how scopolamine-treated animals would respond to a series of reward-directed instrumental learning (RDIL) tasks. OBJECTIVES The present study was designed to investigate the effects of chronic intraperitoneal injection of scopolamine in Wistar rats on RDIL, as well as on the expression of memory-related molecules in the dorsal hippocampus (DH) and cerebral cortex (CCx). METHODS The effects of the pretraining injection of scopolamine on the acquisition of instrumental response (experiment 1) were first investigated. Then, the effects of post-training manipulation on the maintenance of instrumental response and the responses to changes in contingency degradation and signal discrimination were assessed (experiment 2). Finally, the expression of cyclic AMP response element-binding protein (CREB), phosphorylated CREB, and brain-derived neurotrophic factor in the DH and CCx were examined using Western blotting and enzyme-linked immunosorbent assay. RESULTS The acquisition of instrumental conditioning is more vulnerable than its maintenance. The 3.0-mg/kg dose of scopolamine rendered rats unable to make adaptive changes in facing contingency degradation and correct responses in signal discrimination tasks. Furthermore, CREB signaling was inactivated by pretraining scopolamine treatment in both the DH and CCx. Nevertheless, this pathway was selectively suppressed by post-training treatment only in the CCx during memory reconsolidation. CONCLUSIONS The results suggest that scopolamine-induced cognitive deficits on RDIL are related to the distinguishing alteration of CREB signaling in the DH and CCx.
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Affiliation(s)
- Zhe Shi
- Research Center for Pharmacology and Toxicology, Institute of Medicinal Plant Development (IMPLAD), Chinese Academy of Medical Sciences and Peking Union Medical College, Malianwa North Road No. 151, Beijing, 100193, China
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11
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Mapping memory function in the medial temporal lobe with the immediate-early gene Arc. Behav Brain Res 2013; 254:22-33. [DOI: 10.1016/j.bbr.2013.04.048] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Accepted: 04/27/2013] [Indexed: 12/29/2022]
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12
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Wang X, Xue Q, Yan F, Li L, Liu J, Li S, Hu S. Ulinastatin as a neuroprotective and anti-inflammatory agent in infant piglets model undergoing surgery on hypothermic low-flow cardiopulmonary bypass. Paediatr Anaesth 2013; 23:209-16. [PMID: 23384299 DOI: 10.1111/pan.12073] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/02/2012] [Indexed: 11/27/2022]
Abstract
OBJECTIVE Infants are potentially more susceptible to brain injury mediated via cell death attributed to cardiopulmonary bypass (CPB) especially with prolonged hypothermic low flow (HLF). We hypothesized that a human urinary protease inhibitor (ulinastatin), by its anti-inflammatory effect, would reduce central nervous system (CNS) injury during HLF. METHODS Fifteen general-type infant piglets were randomized to ulinastatin group (group U, n = 5), control group (group C, n = 5), and sham operation group (group S, n = 5). Routine CPB was established after median thoracotomy in group U and C under anesthesia. When the temperature of infant piglets dropped down to 25 °C, low-flow CPB (50 ml·kg(-1) ·min(-1) ) was instituted. After 120 min of aortic cross-clamping and 20- to 30-min rewarming, the aortic cross-clamp was removed and finally the piglet was weaned from CPB. Five thousand units per killogram of ulinastatin and equivalently normal saline were, respectively, given at the beginning of and at aortic declamping in group U and group C. group S just received sham median thoracotomy. Venous blood samples were taken immediately after anesthesia induction in all three groups, 5- and 120-min post CPB in both group U and C, respectively; plasma markers of inflammation and CNS injury were compared. Pathology results of hippocampus were observed by light microscopy. RESULTS Statistically significant differences between group C and U were noted in the expression of inflammatory markers such as IL-10, TNF-α and neuron-specific enolase at 120-min post CPB. Brain injuries were observed in both groups (index cases and controls) and were milder in group U. CONCLUSIONS In our study, HLF CPB on infant piglets resulted in brain injury, and ulinastatin might reduce the extent of such injury.
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Affiliation(s)
- Xiaocou Wang
- Department of Anesthesiology, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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13
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Jurado-Parras MT, Sánchez-Campusano R, Castellanos NP, del-Pozo F, Gruart A, Delgado-García JM. Differential contribution of hippocampal circuits to appetitive and consummatory behaviors during operant conditioning of behaving mice. J Neurosci 2013; 33:2293-304. [PMID: 23392660 PMCID: PMC6619163 DOI: 10.1523/jneurosci.1013-12.2013] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2012] [Revised: 11/02/2012] [Accepted: 11/11/2012] [Indexed: 12/21/2022] Open
Abstract
Operant conditioning is a type of associative learning involving different and complex sensorimotor and cognitive processes. Because the hippocampus has been related to some motor and cognitive functions involved in this type of learning (such as object recognition, spatial orientation, and associative learning tasks), we decided to study in behaving mice the putative changes in strength taking place at the hippocampal CA3-CA1 synapses during the acquisition and performance of an operant conditioning task. Mice were chronically implanted with stimulating electrodes in the Schaffer collaterals and with recording electrodes in the hippocampal CA1 area and trained to an operant task using a fixed-ratio (1:1) schedule. We recorded the field EPSPs (fEPSPs) evoked at the CA3-CA1 synapse during the performance of appetitive (going to the lever, lever press) and consummatory (going to the feeder, eating) behaviors. In addition, we recorded the local field potential activity of the CA1 area during similar behavioral displays. fEPSPs evoked at the CA3-CA1 synapse presented larger amplitudes for appetitive than for consummatory behaviors. This differential change in synaptic strength took place in relation to the learning process, depending mainly on the moment in which mice reached the selected criterion. Thus, selective changes in CA3-CA1 synaptic strength were dependent on both the behavior display and the learning stage. In addition, significant changes in theta band power peaks and their corresponding discrete frequencies were noticed during these behaviors across the sequence of events characterizing this type of associative learning but not during the acquisition process.
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Affiliation(s)
| | | | - Nazareth P. Castellanos
- Laboratory of Cognitive and Computational Neuroscience, Center for Biomedical Technology, Madrid Technical University, 28060 Madrid, Spain
| | - Francisco del-Pozo
- Laboratory of Cognitive and Computational Neuroscience, Center for Biomedical Technology, Madrid Technical University, 28060 Madrid, Spain
| | - Agnès Gruart
- Division of Neurosciences, Pablo de Olavide University, 41013 Seville, Spain, and
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14
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Cerebral antioxidant enzyme increase associated with learning deficit in type 2 diabetes rats. Brain Res 2012; 1481:97-106. [PMID: 22981416 DOI: 10.1016/j.brainres.2012.08.056] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Revised: 07/29/2012] [Accepted: 08/30/2012] [Indexed: 11/22/2022]
Abstract
In this study, we examined alterations in the enzymatic antioxidant defenses associated with learning deficits induced by type 2 diabetes, and studied the effects of the peroxisome proliferator-activated receptor γ agonist pioglitazone on these learning deficits. Learning ability was assessed by visual discrimination tasks in Otsuka Long-Evans Tokushima Fatty (OLETF) rats, as a model of spontaneous type 2 diabetes. Levels of the antioxidant enzymes glutathione peroxidase (GPx), Cu(2+)-Zn(2+) superoxide dismutase (CuZn-SOD) and manganese SOD were measured in the cortex, hippocampus and striatum. Half the rats received oral pioglitazone (20mg/kg/day) from the early stage of diabetes (22 weeks old) to 27 weeks old. OLETF rats showed learning deficits compared with control, Long-Evans Tokushima Otsuka (LETO) rats. GPx levels in the cortex and hippocampus were increased in OLETF rats compared with LETO rats, with an inverse correlation between GPx in the hippocampus and learning score. CuZn-SOD levels were also increased in the hippocampus in OLETF rats. Pioglitazone reduced blood glucose and increased serum adiponectin levels, but had no effect on learning tasks or antioxidant enzymes, except for CuZn-SOD. These results suggest that an oxidative imbalance reflected by increased brain antioxidant enzymes plays an important role in the development of learning deficits in type 2 diabetes. Early pioglitazone administration partly ameliorated diabetic symptoms, but was unable to completely recover cerebral oxidative imbalance and functions. These results suggest that diabetes-induced brain impairment, which results in learning deficits, may have occurred before the appearance of the symptoms of overt diabetes.
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15
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Long-term decrease in immediate early gene expression after electroconvulsive seizures. J Neural Transm (Vienna) 2012; 120:259-66. [PMID: 22875635 DOI: 10.1007/s00702-012-0861-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2012] [Accepted: 06/29/2012] [Indexed: 10/28/2022]
Abstract
Electroconvulsive therapy (ECT) is a well-established psychiatric treatment for severe depression. Despite its clinical utility, post-ECT memory deficits are a common side effect. Neuronal plasticity and memory consolidation are intimately related to the expression of immediate early genes (IEG), such as Egr1, Fos and Arc. Changes in IEG activation have been postulated to underlie long-term neuronal adaptations following electroconvulsive seizures (ECS), an animal model of ECT. To test this hypothesis, we used real-time PCR to examine the effect of acute and chronic ECS (8 sessions, one every other day) on the long-term (>24 h) expression of IEG Egr1, Fos and Arc in the hippocampus, a brain region implicated both in the pathophysiology of depression as well as in memory function. We observed a transient increase in Egr1 and Fos expression immediately after ECS, followed by a long-term decrease of IEG levels after both acute and chronic ECS. A separate group of animals, submitted to the same chronic ECS protocol and then subjected to open field or passive avoidance tasks, confirmed robust memory deficits 2 weeks after the last chronic ECS. The possible role of IEG downregulation on long-term learning deficits observed following ECS are discussed.
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16
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Nikbakht N, Zarei B, Shirani E, Moshtaghian J, Esmaeili A, Habibian S. Experience-dependent expression of rat hippocampal Arc and Homer 1a after spatial learning on 8-arm and 12-arm radial mazes. Neuroscience 2012; 218:49-55. [DOI: 10.1016/j.neuroscience.2012.05.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2012] [Revised: 05/09/2012] [Accepted: 05/10/2012] [Indexed: 10/28/2022]
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17
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Arendt DH, Smith JP, Bastida CC, Prasad MS, Oliver KD, Eyster KM, Summers TR, Delville Y, Summers CH. Contrasting hippocampal and amygdalar expression of genes related to neural plasticity during escape from social aggression. Physiol Behav 2012; 107:670-9. [PMID: 22450262 DOI: 10.1016/j.physbeh.2012.03.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2011] [Revised: 03/01/2012] [Accepted: 03/05/2012] [Indexed: 01/03/2023]
Abstract
Social subjugation has widespread consequences affecting behavior and underlying neural systems. We hypothesized that individual differences in stress responsiveness were associated with differential expression of neurotrophin associated genes within the hippocampus and amygdala. To do this we examined the brains of hamsters placed in resident/intruder interactions, modified by the opportunity to escape from aggression. In the amygdala, aggressive social interaction stimulated increased BDNF receptor TrK(B) mRNA levels regardless of the ability to escape the aggressor. In contrast, the availability of escape limited the elevation of GluR(1) AMPA subunit mRNA. In the hippocampal CA(1), the glucocorticoid stress hormone, cortisol, was negatively correlated with BDNF and TrK(B) gene expression, but showed a positive correlation with BDNF expression in the DG. Latency to escape the aggressor was also negatively correlated with CA(1) BDNF expression. In contrast, the relationship between amygdalar TrK(B) and GluR(1) was positive with respect to escape latency. These results suggest that an interplay of stress and neurotrophic systems influences learned escape behavior. Animals which escape faster seem to have a more robust neurotrophic profile in the hippocampus, with the opposite of this pattern in the amygdala. We propose that changes in the equilibrium of hippocampal and amygdalar learning result in differing behavioral stress coping choices.
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Affiliation(s)
- David H Arendt
- Department of Biology, University of South Dakota, Vermillion, SD 57069, USA
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18
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Hart AK, Fioravante D, Liu RY, Phares GA, Cleary LJ, Byrne JH. Serotonin-mediated synapsin expression is necessary for long-term facilitation of the Aplysia sensorimotor synapse. J Neurosci 2011; 31:18401-11. [PMID: 22171042 PMCID: PMC3407595 DOI: 10.1523/jneurosci.2816-11.2011] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2011] [Revised: 10/13/2011] [Accepted: 10/30/2011] [Indexed: 11/21/2022] Open
Abstract
Serotonin (5-HT)-induced long-term facilitation (LTF) of the Aplysia sensorimotor synapse depends on enhanced gene expression and protein synthesis, but identification of the genes whose expression and regulation are necessary for LTF remains incomplete. In this study, we found that one such gene is synapsin, which encodes a synaptic vesicle-associated protein known to regulate short-term synaptic plasticity. Both synapsin mRNA and protein levels were increased by 5-HT. Upregulation of synapsin protein occurred in presynaptic sensory neurons at neurotransmitter release sites. To investigate the molecular mechanisms underlying synapsin regulation, we cloned the promoter region of Aplysia synapsin, and found that the synapsin promoter contained a cAMP response element (CRE), raising the possibility that the transcriptional activator CRE-binding protein 1 (CREB1) mediates 5-HT-induced regulation of synapsin. Indeed, binding of CREB1 to the synapsin promoter was increased following treatment with 5-HT. Furthermore, increased acetylation of histones H3 and H4 and decreased association of histone deacetylase 5 near the CRE site are consistent with transcriptional activation by CREB1. RNA interference (RNAi) targeting synapsin mRNA blocked the 5-HT-induced increase in synapsin protein levels and LTF; in the absence of 5-HT treatment, basal synapsin levels were unaffected. These results indicate that the 5-HT-induced regulation of synapsin levels is necessary for LTF and that this regulation is part of the cascade of synaptic events involved in the consolidation of memory.
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Affiliation(s)
- Anne K. Hart
- Department of Neurobiology and Anatomy, W.M. Keck Center for the Neurobiology of Learning and Memory, The University of Texas Medical School at Houston, Houston, Texas 77030
| | - Diasinou Fioravante
- Department of Neurobiology and Anatomy, W.M. Keck Center for the Neurobiology of Learning and Memory, The University of Texas Medical School at Houston, Houston, Texas 77030
| | - Rong-Yu Liu
- Department of Neurobiology and Anatomy, W.M. Keck Center for the Neurobiology of Learning and Memory, The University of Texas Medical School at Houston, Houston, Texas 77030
| | - Gregg A. Phares
- Department of Neurobiology and Anatomy, W.M. Keck Center for the Neurobiology of Learning and Memory, The University of Texas Medical School at Houston, Houston, Texas 77030
| | - Leonard J. Cleary
- Department of Neurobiology and Anatomy, W.M. Keck Center for the Neurobiology of Learning and Memory, The University of Texas Medical School at Houston, Houston, Texas 77030
| | - John H. Byrne
- Department of Neurobiology and Anatomy, W.M. Keck Center for the Neurobiology of Learning and Memory, The University of Texas Medical School at Houston, Houston, Texas 77030
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Rapanelli M, Frick LR, Zanutto BS. Learning an operant conditioning task differentially induces gliogenesis in the medial prefrontal cortex and neurogenesis in the hippocampus. PLoS One 2011; 6:e14713. [PMID: 21364751 PMCID: PMC3041768 DOI: 10.1371/journal.pone.0014713] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2010] [Accepted: 01/31/2011] [Indexed: 11/18/2022] Open
Abstract
Circuit modification associated with learning and memory involves multiple events, including the addition and remotion of newborn cells trough adulthood. Adult neurogenesis and gliogenesis were mainly described in models of voluntary exercise, enriched environments, spatial learning and memory task; nevertheless, it is unknown whether it is a common mechanism among different learning paradigms, like reward dependent tasks. Therefore, we evaluated cell proliferation, neurogenesis, astrogliogenesis, survival and neuronal maturation in the medial prefrontal cortex (mPFC) and the hippocampus (HIPP) during learning an operant conditioning task. This was performed by using endogenous markers of cell proliferation, and a bromodeoxiuridine (BrdU) injection schedule in two different phases of learning. Learning an operant conditioning is divided in two phases: a first phase when animals were considered incompletely trained (IT, animals that were learning the task) when they performed between 50% and 65% of the responses, and a second phase when animals were considered trained (Tr, animals that completely learned the task) when they reached 100% of the responses with a latency time lower than 5 seconds. We found that learning an operant conditioning task promoted cell proliferation in both phases of learning in the mPFC and HIPP. Additionally, the results presented showed that astrogliogenesis was induced in the medial prefrontal cortex (mPFC) in both phases, however, the first phase promoted survival of these new born astrocytes. On the other hand, an increased number of new born immature neurons was observed in the HIPP only in the first phase of learning, whereas, decreased values were observed in the second phase. Finally, we found that neuronal maturation was induced only during the first phase. This study shows for the first time that learning a reward-dependent task, like the operant conditioning, promotes neurogenesis, astrogliogenesis, survival and neuronal maturation depending on the learning phase in the mPFC-HIPP circuit.
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Affiliation(s)
- Maximiliano Rapanelli
- Laboratorio de Biología del Comportamiento, IBYME-CONICET, Ciudad de Buenos Aires, Buenos Aires, Argentina.
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20
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Barry DN, Commins S. Imaging spatial learning in the brain using immediate early genes: insights, opportunities and limitations. Rev Neurosci 2011; 22:131-42. [DOI: 10.1515/rns.2011.019] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Neuropeptide S mitigates spatial memory impairment induced by rapid eye movement sleep deprivation in rats. Neuroreport 2010; 21:623-8. [PMID: 20495497 DOI: 10.1097/wnr.0b013e328339b5f9] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Rapid eye movement (REM) sleep deprivation causes learning and memory deficits. Neuropeptide S, a newly discovered neuropeptide, has been shown to regulate arousal, anxiety, and may enhance long-term memory formation and spatial memory. However, it is unknown whether neuropeptide S could improve the REM sleep deprivation-induced memory impairment. Here, we report that 72-h REM sleep deprivation in rats resulted in spatial memory impairment and reduced phosphorylation level of cAMP-response element binding protein in the hippocampus, both of which were reversed by central administration of neuropeptide S. The results suggest that neuropeptide S mitigates spatial memory impairment in rats induced by 72-h REM sleep deprivation, possibly through activating cAMP-response element binding protein phosphorylation in the hippocampus.
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22
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Hu TT, Van der Gucht E, Eysel UT, Arckens L. Retinal lesions induce layer-specific Fos expression changes in cat area 17. Exp Brain Res 2010; 205:139-44. [PMID: 20602093 DOI: 10.1007/s00221-010-2343-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2010] [Accepted: 06/17/2010] [Indexed: 11/25/2022]
Abstract
Quantitative analysis of the neuronal activity marker Fos revealed activity-dependent and lamina-specific changes in adult cat area 17, 14 days to 1 month after the induction of central retinal lesions. The supra- and infragranular layers were clearly differently engaged in the response to the visual deprivation, both inside and outside the lesion projection zone. The center of the LPZ exhibited an activity decrease in the extragranular layers, which was mainly reflected by an intracellular down-regulation of Fos rather than a decline in the number of Fos-immunoreactive nuclei. Interestingly, the infragranular layers displayed more Fos-immunoreactive neurons in experimental animals. This recruitment of an additional population of Fos expressing neurons in the subcortically projecting infragranular layers might have a protective function against neurodegeneration in the direct retinal target structures.
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Affiliation(s)
- Tjing-Tjing Hu
- Laboratory of Neuroplasticity and Neuroproteomics, Katholieke Universiteit Leuven, Naamsestraat 59, 3000, Leuven, Belgium
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Valentinuzzi ME, Zanutto SB, Torres ME, Spelzini R. The Development of Biomedical Engineering. IEEE Pulse 2010; 1:28-38. [DOI: 10.1109/mpul.2010.937249] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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24
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Transcriptomic responses in mouse brain exposed to chronic excess of the neurotransmitter glutamate. BMC Genomics 2010; 11:360. [PMID: 20529287 PMCID: PMC2896956 DOI: 10.1186/1471-2164-11-360] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2010] [Accepted: 06/07/2010] [Indexed: 12/11/2022] Open
Abstract
Background Increases during aging in extracellular levels of glutamate (Glu), the major excitatory neurotransmitter in the brain, may be linked to chronic neurodegenerative diseases. Little is known about the molecular responses of neurons to chronic, moderate increases in Glu levels. Genome-wide gene expression in brain hippocampus was examined in a unique transgenic (Tg) mouse model that exhibits moderate Glu hyperactivity throughout the lifespan, the neuronal Glutamate dehydrogenase (Glud1) mouse, and littermate 9 month-old wild type mice. Results Integrated bioinformatic analyses on transcriptomic data were used to identify bio-functions, pathways and gene networks underlying neuronal responses to increased Glu synaptic release. Bio-functions and pathways up-regulated in Tg mice were those associated with oxidative stress, cell injury, inflammation, nervous system development, neuronal growth, and synaptic transmission. Increased gene expression in these functions and pathways indicated apparent compensatory responses offering protection against stress, promoting growth of neuronal processes (neurites) and re-establishment of synapses. The transcription of a key gene in the neurite growth network, the kinase Ptk2b, was significantly up-regulated in Tg mice as was the activated (phosphorylated) form of the protein. In addition to genes related to neurite growth and synaptic development, those associated with neuronal vesicle trafficking in the Huntington's disease signalling pathway, were also up-regulated. Conclusions This is the first study attempting to define neuronal gene expression patterns in response to chronic, endogenous Glu hyperactivity at brain synapses. The patterns observed were characterized by a combination of responses to stress and stimulation of nerve growth, intracellular transport and recovery.
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Rapanelli M, Frick LR, Zanutto BS. Modulation of endothelial and neuronal nitric oxide synthases during learning of an operant conditioning task. J Neurochem 2010; 113:725-34. [DOI: 10.1111/j.1471-4159.2010.06640.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Rapanelli M, Lew SE, Frick LR, Zanutto BS. Plasticity in the rat prefrontal cortex: linking gene expression and an operant learning with a computational theory. PLoS One 2010; 5:e8656. [PMID: 20111591 PMCID: PMC2810321 DOI: 10.1371/journal.pone.0008656] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2009] [Accepted: 12/11/2009] [Indexed: 12/30/2022] Open
Abstract
The plasticity in the medial Prefrontal Cortex (mPFC) of rodents or lateral prefrontal cortex in non human primates (lPFC), plays a key role neural circuits involved in learning and memory. Several genes, like brain-derived neurotrophic factor (BDNF), cAMP response element binding (CREB), Synapsin I, Calcium/calmodulin-dependent protein kinase II (CamKII), activity-regulated cytoskeleton-associated protein (Arc), c-jun and c-fos have been related to plasticity processes. We analysed differential expression of related plasticity genes and immediate early genes in the mPFC of rats during learning an operant conditioning task. Incompletely and completely trained animals were studied because of the distinct events predicted by our computational model at different learning stages. During learning an operant conditioning task, we measured changes in the mRNA levels by Real-Time RT-PCR during learning; expression of these markers associated to plasticity was incremented while learning and such increments began to decline when the task was learned. The plasticity changes in the lPFC during learning predicted by the model matched up with those of the representative gene BDNF. Herein, we showed for the first time that plasticity in the mPFC in rats during learning of an operant conditioning is higher while learning than when the task is learned, using an integrative approach of a computational model and gene expression.
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Affiliation(s)
- Maximiliano Rapanelli
- Instituto de Biología y Medicina Experimental (CONICET), Laboratorio de Biología del Comportamiento, Ciudad de Buenos Aires, Buenos Aires, Argentina.
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