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You TY, Dong Q, Cui M. Emerging Links between Cerebral Blood Flow Regulation and Cognitive Decline: A Role for Brain Microvascular Pericytes. Aging Dis 2023:AD.2022.1204. [PMID: 37163446 PMCID: PMC10389833 DOI: 10.14336/ad.2022.1204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Accepted: 12/04/2022] [Indexed: 05/12/2023] Open
Abstract
Cognitive impairment associated with vascular etiology has been of considerable interest in the development of dementia. Recent studies have started to uncover cerebral blood flow deficits in initiating cognitive deterioration. Brain microvascular pericytes, the only type of contractile cells in capillaries, are involved in the precise modulation of vascular hemodynamics due to their ability to regulate resistance in the capillaries. They exhibit potential in maintaining the capillary network geometry and basal vascular tone. In addition, pericytes can facilitate better blood flow supply in response to neurovascular coupling. Their dysfunction is thought to disturb cerebral blood flow causing metabolic imbalances or structural injuries, leading to consequent cognitive decline. In this review, we summarize the characteristics of microvascular pericytes in brain blood flow regulation and outline the framework of a two-hit hypothesis in cognitive decline, where we emphasize how pericytes serve as targets of cerebral blood flow dysregulation that occurs with neurological challenges, ranging from genetic factors, aging, and pathological proteins to ischemic stress.
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Affiliation(s)
- Tong-Yao You
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai, China
| | - Qiang Dong
- Department of Neurology, Huashan Hospital, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Fudan University, Shanghai, China
- National Center for Neurological Disorders, Huashan Hospital, Fudan University, Shanghai, China
| | - Mei Cui
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai, China
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2
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Openshaw RL, Thomson DM, Bristow GC, Mitchell EJ, Pratt JA, Morris BJ, Dawson N. 16p11.2 deletion mice exhibit compromised fronto-temporal connectivity, GABAergic dysfunction, and enhanced attentional ability. Commun Biol 2023; 6:557. [PMID: 37225770 DOI: 10.1038/s42003-023-04891-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 05/01/2023] [Indexed: 05/26/2023] Open
Abstract
Autism spectrum disorders are more common in males, and have a substantial genetic component. Chromosomal 16p11.2 deletions in particular carry strong genetic risk for autism, yet their neurobiological impact is poorly characterised, particularly at the integrated systems level. Here we show that mice reproducing this deletion (16p11.2 DEL mice) have reduced GABAergic interneuron gene expression (decreased parvalbumin mRNA in orbitofrontal cortex, and male-specific decreases in Gad67 mRNA in parietal and insular cortex and medial septum). Metabolic activity was increased in medial septum, and in its efferent targets: mammillary body and (males only) subiculum. Functional connectivity was altered between orbitofrontal, insular and auditory cortex, and between septum and hippocampus/subiculum. Consistent with this circuit dysfunction, 16p11.2 DEL mice showed reduced prepulse inhibition, but enhanced performance in the continuous performance test of attentional ability. Level 1 autistic individuals show similarly heightened performance in the equivalent human test, also associated with parietal, insular-orbitofrontal and septo-subicular dysfunction. The data implicate cortical and septal GABAergic dysfunction, and resulting connectivity changes, as the cause of pre-attentional and attentional changes in autism.
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Affiliation(s)
- Rebecca L Openshaw
- School of Psychology and Neuroscience, College of Medical, Veterinary and Life Sciences, University of Glasgow, Sir James Black Building, Glasgow, G12 8QQ, UK
| | - David M Thomson
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow, G4 0RE, UK
| | - Greg C Bristow
- Department of Biomedical and Life Sciences, Lancaster University, Lancaster, LA1 4YW, UK
- School of Pharmacy and Medical Sciences, University of Bradford, Bradford, BD7 1DP, UK
| | - Emma J Mitchell
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow, G4 0RE, UK
| | - Judith A Pratt
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow, G4 0RE, UK
| | - Brian J Morris
- School of Psychology and Neuroscience, College of Medical, Veterinary and Life Sciences, University of Glasgow, Sir James Black Building, Glasgow, G12 8QQ, UK.
| | - Neil Dawson
- Department of Biomedical and Life Sciences, Lancaster University, Lancaster, LA1 4YW, UK.
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3
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Schaeffer E, Roeben B, Granert O, Hanert A, Liepelt-Scarfone I, Leks E, Otterbein S, Saraykin P, Busch JH, Synofzik M, Stransky E, Bartsch T, Berg D. Effects of exergaming on hippocampal volume and brain-derived neurotrophic factor levels in Parkinson's disease. Eur J Neurol 2021; 29:441-449. [PMID: 34724287 DOI: 10.1111/ene.15165] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Revised: 10/17/2021] [Accepted: 10/27/2021] [Indexed: 12/30/2022]
Abstract
BACKGROUND AND OBJECTIVE Cognitive impairment is among the most burdensome non-motor symptoms in Parkinson's disease (PD) and has been associated with hippocampal atrophy. Exercise has been reported to enhance neuroplasticity in the hippocampus in correlation with an improvement of cognitive function. We present data from the Training-PD study, which was designed to evaluate effects of an "" training protocol on neuronal plasticity in PD. METHODS We initiated a 6-week exergaming training program, combining visually stimulating computer games with physical exercise in 17 PD patients and 18 matched healthy controls. Volumetric segmentation of hippocampal subfields on T1- and T2-weighted magnetic resonance imaging and brain-derived neurotrophic factor (BDNF) serum levels were analyzed before and after the training protocol. RESULTS The PD group showed a group-dependent significant volume increase of the left hippocampal subfields CA1, CA4/dentate gyrus (DG) and subiculum after the 6-week training protocol. The effect was most pronounced in the left DG of PD patients, who showed a significantly smaller percentage volume compared to healthy controls at baseline, but not at follow-up. Both groups had a significant increase in serum BDNF levels after training. CONCLUSIONS The results of the present study indicate that exergaming might be a suitable approach to induce hippocampal volume changes in PD patients. Further and larger studies are needed to verify our findings.
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Affiliation(s)
- Eva Schaeffer
- Department of Neurology, Christian-Albrecht-University Kiel, Kiel, Germany
| | - Benjamin Roeben
- Department of Neurodegeneration and Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany.,German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany
| | - Oliver Granert
- Department of Neurology, Christian-Albrecht-University Kiel, Kiel, Germany
| | - Annika Hanert
- Department of Neurology, Christian-Albrecht-University Kiel, Kiel, Germany
| | - Inga Liepelt-Scarfone
- Department of Neurodegeneration and Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany.,German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany.,IB Hochschule, Studienzentrum Stuttgart, Stuttgart, Germany
| | - Edyta Leks
- Department of Biomedical Magnetic Resonance, University of Tübingen, Tübingen, Germany
| | - Sascha Otterbein
- Department of Neurodegeneration and Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
| | - Pavel Saraykin
- Department of Neurodegeneration and Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
| | - Jan-Hinrich Busch
- Department of Neurodegeneration and Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
| | - Matthis Synofzik
- Department of Neurodegeneration and Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany.,German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany
| | - Elke Stransky
- Department of Neurodegeneration and Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
| | - Thorsten Bartsch
- Department of Neurology, Christian-Albrecht-University Kiel, Kiel, Germany
| | - Daniela Berg
- Department of Neurology, Christian-Albrecht-University Kiel, Kiel, Germany.,Department of Neurodegeneration and Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
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Gbyl K, Støttrup MM, Mitta Raghava J, Xue Jie S, Videbech P. Hippocampal volume and memory impairment after electroconvulsive therapy in patients with depression. Acta Psychiatr Scand 2021; 143:238-252. [PMID: 33251575 DOI: 10.1111/acps.13259] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 10/21/2020] [Accepted: 11/23/2020] [Indexed: 12/25/2022]
Abstract
OBJECTIVE Patients hesitate to consent to electroconvulsive therapy (ECT) because of the fear of memory impairment. The mechanisms underlying this impairment are unclear, but several observations suggest hippocampal alterations may be involved. We investigated whether ECT-induced change in hippocampal volume correlates with memory impairment. METHODS Using a 3 T MRI scanner, we acquired brain images and assessed cognitive performance in 22 severely depressed patients at three time points: (1) before ECT series, (2) within one week after the series, and (3) at six-month follow-up. The hippocampus was segmented into subregions using FreeSurfer. The dentate gyri (DG) were the primary regions of interest (ROIs) and major hippocampal subregions secondary ROIs. Cognitive performance was assessed using the Screen for Cognitive Impairment in Psychiatry and verbal memory using the Verbal Learning subtest. The linear mixed model and the repeated-measures correlation were used for statistical analyses. RESULTS ECT induced an increase in the right and left DG volume with co-occurring worsening in verbal memory, and these changes were within-patients negatively correlated (right DG, rrm = -0.85, df = 18, p = 0.0000002; left DG, rrm = -0.58, df = 18, p = 0.008). At a six-month follow-up, the volume of both DG decreased with a co-occurring improvement in verbal memory, and these changes were negatively correlated in the right DG (rrm = -0.64, df = 15, p = 0.005). Volume increases in 14 secondary ROIs were also negatively correlated with memory impairment. CONCLUSION ECT-related transient increases in the volume of major hippocampal subregions within-patients are associated with memory impairment. Hippocampal alterations following ECT should be the focus in searching for causes of the cognitive side effects.
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Affiliation(s)
- Krzysztof Gbyl
- Center for Neuropsychiatric Depression Research, Psychiatric Center Glostrup, Glostrup, Denmark
| | - Mette Marie Støttrup
- Center for Neuropsychiatric Depression Research, Psychiatric Center Glostrup, Glostrup, Denmark
| | - Jayachandra Mitta Raghava
- Center for Neuropsychiatric Schizophrenia Research and Center for Clinical Intervention and Neuropsychiatric Schizophrenia Research, Psychiatric Center Glostrup, Glostrup, Denmark.,Functional Imaging Unit, Department of Clinical Physiology, Nuclear Medicine and PET, Rigshospitalet, Glostrup, Denmark
| | - Song Xue Jie
- Department of Clinical Psychiatry, Psychiatric Center Glostrup, Glostrup, Denmark
| | - Poul Videbech
- Center for Neuropsychiatric Depression Research, Psychiatric Center Glostrup, Glostrup, Denmark
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Li Q, Xiao H, Shao Y, Chang X, Zhang Y, Zhou Z. Paraquat increases Interleukin-1β in hippocampal dentate gyrus to impair hippocampal neurogenesis in adult mice. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 200:110733. [PMID: 32450442 DOI: 10.1016/j.ecoenv.2020.110733] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 05/01/2020] [Accepted: 05/03/2020] [Indexed: 06/11/2023]
Abstract
Paraquat (1,1'-dimethyl-4,4'-bipyridium dichloride, PQ), a non-selective and efficient herbicide, causes neuroinflammation, neurodegeneration and memory dysfunction. However, adverse effects of PQ on the neuroimmune interactions have rarely been investigated. Female adult C57/BL6 mice were divided into 3 groups and treated with PQ (intraperitoneal injection, 1 mg/kg or 5 mg/kg) or the vehicle (an equivalent volume of 0.9% saline) every two days, at day 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, for a total of 14 doses. We evaluated blood-brain barrier (BBB) integrity and PQ concentrations during the course of PQ exposure and tested interleukin-1β (IL-1β) concentrations in dentate gyrus (DG) after 28 days PQ exposure. In addition, memory function, neural stem cells (NSCs) proliferation, neurogenesis and microglia polarization were analyzed after PQ exposure. Furthermore, mice were intraperitoneal injections of anti-IL-1β during 5 mg/kg PQ exposure to test the rule of IL-1β. Blood-brain barrier (BBB) permeability and PQ concentrations increased gradually during PQ exposure (n = 6). Moreover, memory function, NSCs proliferation and neurogenesis were impaired after 5 mg/kg PQ exposure (n = 6). Further analyses revealed that 'classically' activated (M1) microglia and IL-1β concentrations in DG were increased after 5 mg/kg PQ treatment (n = 6). Moreover, we found that neutralization of IL-1β partly restored PQ-induced NSCs impairments and memory dysfunction (n = 6). In conclusion, our results revealed that PQ induced NSCs impairments and memory dysfunction in adult mice, which was related to the release of IL-1β by M1-polarized microglia in DG. These findings may help understand the neurotoxic effect of PQ.
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Affiliation(s)
- Qian Li
- School of Public Health and Key Laboratory of Public Health Safety of the Ministry of Education, Fudan University, Shanghai, 200032, China
| | - Hongxi Xiao
- School of Public Health and Key Laboratory of Public Health Safety of the Ministry of Education, Fudan University, Shanghai, 200032, China
| | - Yiming Shao
- School of Public Health and Key Laboratory of Public Health Safety of the Ministry of Education, Fudan University, Shanghai, 200032, China
| | - Xiuli Chang
- School of Public Health and Key Laboratory of Public Health Safety of the Ministry of Education, Fudan University, Shanghai, 200032, China
| | - Yubin Zhang
- School of Public Health and Key Laboratory of Public Health Safety of the Ministry of Education, Fudan University, Shanghai, 200032, China.
| | - Zhijun Zhou
- School of Public Health and Key Laboratory of Public Health Safety of the Ministry of Education, Fudan University, Shanghai, 200032, China.
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6
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Kantak KM. Adolescent-onset vs. adult-onset cocaine use: Impact on cognitive functioning in animal models and opportunities for translation. Pharmacol Biochem Behav 2020; 196:172994. [PMID: 32659242 DOI: 10.1016/j.pbb.2020.172994] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Revised: 05/25/2020] [Accepted: 07/02/2020] [Indexed: 01/03/2023]
Abstract
Animal models are poised to make key contributions to the study of cognitive deficits associated with chronic cocaine use in people. Advantages of animal models include use of a longitudinal experimental design that can control for drug use history and onset-age, sex, drug consumption, and abstinence duration. Twenty-two studies were reviewed (13 in adult male rats, 5 in adolescent vs. adult male rats, 3 in adult male monkeys, and 1 in adult female monkeys), and it was demonstrated repeatedly that male animals with adult-onset cocaine self-administration exposure had impairments in sustained attention, decision making, stimulus-reward learning, working memory, and cognitive flexibility, but not habit learning and spatial learning and memory. These findings have translational relevance because adult cocaine users exhibit a similar range of cognitive deficits. In the limited number of studies available, male rats self-administering cocaine during adolescence were less susceptible than adults to impairment in cognitive flexibility, stimulus-reward learning, and decision making, but were more susceptible than adults to impairment in working memory, a finding also reported in the few studies performed in early-onset cocaine users. These findings suggest that animal models can help fill an unmet need for investigating important but yet-to-be-fully-addressed research questions in people. Research priorities include further investigation of differences between adolescents and adults as well as between males and females following chronic cocaine self-administration. A comprehensive understanding of the broad range of cognitive consequences of chronic cocaine use and the role of developmental plasticity can be of value for improving neuropsychological recovery efforts.
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Affiliation(s)
- Kathleen M Kantak
- Department of Psychological and Brain Sciences, Boston University, Boston, MA 02215, United States of America.
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7
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Muneoka K, Oda Y, Iwata M, Iyo M, Hashimoto K, Shirayama Y. Monoaminergic balances predict non-depression-like phenotype in Learned Helplessness Paradigm. Neuroscience 2020; 440:290-298. [PMID: 32222554 DOI: 10.1016/j.neuroscience.2020.03.033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2019] [Revised: 03/18/2020] [Accepted: 03/19/2020] [Indexed: 12/15/2022]
Abstract
Monoamine neuronal system abnormality is hypothesized to be the neurochemical pathology in depression, as it is supported by the efficacy of conventional antidepressants. The learned helplessness paradigm generates depression-like (LH) and non-depression-like (non-LH) behavioral models. Examination of the neurochemical states accompanying such distinct behavioral phenotypes can facilitate investigations of the mechanisms underlying resilience and the search for new strategies for depression prevention and therapy. Here, we measured the levels of monoamines, including noradrenaline (NA), serotonin (5-HT), and dopamine (DA), and their metabolites in the medial prefrontal cortex (mPFC), orbitofrontal cortex (OFC), hippocampus, nucleus accumbens (NAc), amygdala, and striatum in LH, non-LH, and non-manipulated (naïve) rats. Compared with LH rats, non-LH rats showed lower 3-methoxy-4-hydroxyphenylglycol (MHPG) levels and NA turnovers in the amygdala and higher 5-HT levels in the NAc. Compared with naïve rats, non-LH rats showed increased DA and homovanillic acid (HVA) levels in the amygdala and increased 5-hydroxyindoleacetic acid (5-HIAA) levels in the hippocampus and NAc, whereas LH rats exhibited increased HVA levels and DA turnovers in the hippocampus, decreased 5-HIAA levels in the mPFC, increased DA turnovers in the OFC, and decreased DA turnovers in the amygdala. Comparison between LH and non-LH suggest that suppressed amygdaloid NA activity and elevated 5-HT activity in the NAc are related to stress resilience. Changes that occurred in LH or non-LH rats when compared with those in naïve rats suggest that suppressed DA activity in the hippocampus and OFC; elevated DA activity in the amygdala; and facilitated 5-HT activity in the hippocampus, mPFC, and NAc are phenomena related to the expression of a non-depression-like phenotype.
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Affiliation(s)
- Katsumasa Muneoka
- Department of Psychiatry, Teikyo University Chiba Medical Center, Ichihara, Japan; Department of Biochemistry, Showa University School of Medicine, Tokyo, Japan
| | - Yasunori Oda
- Department of Psychiatry, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Masaaki Iwata
- Department of Neuropsychiatry, Faculty of Medicine, Tottori University, Yonago, Japan
| | - Masaomi Iyo
- Department of Psychiatry, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Kenji Hashimoto
- Division of Clinical Neuroscience, Chiba University Center for Forensic Mental Health, Chiba, Japan
| | - Yukihiko Shirayama
- Department of Psychiatry, Teikyo University Chiba Medical Center, Ichihara, Japan; Division of Clinical Neuroscience, Chiba University Center for Forensic Mental Health, Chiba, Japan.
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Perosa V, Priester A, Ziegler G, Cardenas-Blanco A, Dobisch L, Spallazzi M, Assmann A, Maass A, Speck O, Oltmer J, Heinze HJ, Schreiber S, Düzel E. Hippocampal vascular reserve associated with cognitive performance and hippocampal volume. Brain 2020; 143:622-634. [PMID: 31994699 PMCID: PMC7009470 DOI: 10.1093/brain/awz383] [Citation(s) in RCA: 73] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 09/12/2019] [Accepted: 10/07/2019] [Indexed: 01/14/2023] Open
Abstract
Medial temporal lobe dependent cognitive functions are highly vulnerable to hypoxia in the hippocampal region, yet little is known about the relationship between the richness of hippocampal vascular supply and cognition. Hippocampal vascularization patterns have been categorized into a mixed supply from both the posterior cerebral artery and the anterior choroidal artery or a single supply by the posterior cerebral artery only. Hippocampal arteries are small and affected by pathological changes when cerebral small vessel disease is present. We hypothesized, that hippocampal vascularization patterns may be important trait markers for vascular reserve and modulate (i) cognitive performance; (ii) structural hippocampal integrity; and (iii) the effect of cerebral small vessel disease on cognition. Using high-resolution 7 T time-of-flight angiography we manually classified hippocampal vascularization patterns in older adults with and without cerebral small vessel disease in vivo. The presence of a mixed supplied hippocampus was an advantage in several cognitive domains, including verbal list learning and global cognition. A mixed supplied hippocampus also was an advantage for verbal memory performance in cerebral small vessel disease. Voxel-based morphometry showed higher anterior hippocampal grey matter volume in mixed, compared to single supply. We discuss that a mixed hippocampal supply, as opposed to a single one, may increase the reliability of hippocampal blood supply and thereby provide a hippocampal vascular reserve that protects against cognitive impairment.
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Affiliation(s)
- Valentina Perosa
- Department of Neurology, Otto-von-Guericke University, Magdeburg, Germany
- Institute of Cognitive Neurology and Dementia Research, Otto-von-Guericke-University, Magdeburg, Germany
- German Center for Neurodegenerative Diseases (DZNE), Magdeburg, Germany
| | - Anastasia Priester
- Department of Neurology, Otto-von-Guericke University, Magdeburg, Germany
| | - Gabriel Ziegler
- Institute of Cognitive Neurology and Dementia Research, Otto-von-Guericke-University, Magdeburg, Germany
- German Center for Neurodegenerative Diseases (DZNE), Magdeburg, Germany
| | - Arturo Cardenas-Blanco
- Institute of Cognitive Neurology and Dementia Research, Otto-von-Guericke-University, Magdeburg, Germany
- German Center for Neurodegenerative Diseases (DZNE), Magdeburg, Germany
| | - Laura Dobisch
- Institute of Cognitive Neurology and Dementia Research, Otto-von-Guericke-University, Magdeburg, Germany
- German Center for Neurodegenerative Diseases (DZNE), Magdeburg, Germany
| | - Marco Spallazzi
- Department of Neurology, Azienda Ospedaliero-Universitaria, Parma, Italy
| | - Anne Assmann
- Department of Neurology, Otto-von-Guericke University, Magdeburg, Germany
| | - Anne Maass
- German Center for Neurodegenerative Diseases (DZNE), Magdeburg, Germany
| | - Oliver Speck
- German Center for Neurodegenerative Diseases (DZNE), Magdeburg, Germany
- Center for Behavioral Brain Sciences (CBBS), Magdeburg, Germany
- Leibniz-Institute for Neurobiology (LIN), Magdeburg, Germany
- Institute of Physics, Otto-von-Guericke University, Magdeburg, Germany
| | - Jan Oltmer
- German Center for Neurodegenerative Diseases (DZNE), Magdeburg, Germany
| | - Hans-Jochen Heinze
- Department of Neurology, Otto-von-Guericke University, Magdeburg, Germany
- German Center for Neurodegenerative Diseases (DZNE), Magdeburg, Germany
- Center for Behavioral Brain Sciences (CBBS), Magdeburg, Germany
- Leibniz-Institute for Neurobiology (LIN), Magdeburg, Germany
| | - Stefanie Schreiber
- Department of Neurology, Otto-von-Guericke University, Magdeburg, Germany
- German Center for Neurodegenerative Diseases (DZNE), Magdeburg, Germany
- Center for Behavioral Brain Sciences (CBBS), Magdeburg, Germany
| | - Emrah Düzel
- Institute of Cognitive Neurology and Dementia Research, Otto-von-Guericke-University, Magdeburg, Germany
- German Center for Neurodegenerative Diseases (DZNE), Magdeburg, Germany
- Center for Behavioral Brain Sciences (CBBS), Magdeburg, Germany
- Institute of Cognitive Neuroscience, University College London, London, UK
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9
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Reas ET, Hagler DJ, Kuperman JM, Wierenga CE, Galasko D, White NS, Dale AM, Banks SJ, McEvoy LK, Brewer JB. Associations Between Microstructure, Amyloid, and Cognition in Amnestic Mild Cognitive Impairment and Dementia. J Alzheimers Dis 2020; 73:347-357. [PMID: 31796676 PMCID: PMC7266036 DOI: 10.3233/jad-190871] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Although amyloid-β (Aβ) and microstructural brain changes are both effective biomarkers of Alzheimer's disease, their independent or synergistic effects on cognitive decline are unclear. OBJECTIVE To examine associations of Aβ and brain microstructure with cognitive decline in amnestic mild cognitive impairment and dementia. METHODS Restriction spectrum imaging, cerebrospinal fluid Aβ, and longitudinal cognitive data were collected on 23 healthy controls and 13 individuals with mild cognitive impairment or mild to moderate Alzheimer's disease. Neurite density (ND) and isotropic free water diffusion (IF) were computed in fiber tracts and cortical regions of interest. We examined associations of Aβ with regional and whole-brain microstructure, and assessed whether microstructure mediates effects of Aβ on cognitive decline. RESULTS Lower ND in limbic and association fibers and higher medial temporal lobe IF predicted baseline impairment and longitudinal decline across multiple cognitive domains. ND and IF predicted cognitive outcomes after adjustment for Aβ or whole-brain microstructure. Correlations between microstructure and cognition were present for both amyloid-positive and amyloid-negative individuals. Aβ correlated with whole-brain, rather than regional, ND and IF. CONCLUSION Aβ correlates with widespread microstructural brain changes, whereas regional microstructure correlates with cognitive decline. Microstructural abnormalities predict cognitive decline regardless of amyloid, and may inform about neural injury leading to cognitive decline beyond that attributable to amyloid.
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Affiliation(s)
- Emilie T. Reas
- Department of Neurosciences, University of California, San Diego, La Jolla, CA, USA
| | - Donald J. Hagler
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
| | - Joshua M. Kuperman
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
| | - Christina E. Wierenga
- Department of Psychiatry, University of California, San Diego, La Jolla, CA, USA
- Department of Veterans Affairs, San Diego Healthcare system, La Jolla, CA, USA
| | - Douglas Galasko
- Department of Neurosciences, University of California, San Diego, La Jolla, CA, USA
| | - Nathan S. White
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
| | - Anders M. Dale
- Department of Neurosciences, University of California, San Diego, La Jolla, CA, USA
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
| | - Sarah J. Banks
- Department of Neurosciences, University of California, San Diego, La Jolla, CA, USA
| | - Linda K. McEvoy
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
- Department of Family Medicine and Public Health, University of California, San Diego, La Jolla, CA, USA
| | - James B. Brewer
- Department of Neurosciences, University of California, San Diego, La Jolla, CA, USA
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
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10
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Ates S, Deistung A, Schneider R, Prehn C, Lukas C, Reichenbach JR, Schneider-Gold C, Bellenberg B. Characterization of Iron Accumulation in Deep Gray Matter in Myotonic Dystrophy Type 1 and 2 Using Quantitative Susceptibility Mapping and R2 * Relaxometry: A Magnetic Resonance Imaging Study at 3 Tesla. Front Neurol 2019; 10:1320. [PMID: 31920940 PMCID: PMC6923271 DOI: 10.3389/fneur.2019.01320] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Accepted: 11/28/2019] [Indexed: 01/14/2023] Open
Abstract
Quantitative mapping of the magnetic susceptibility and the effective transverse relaxation rate (R2*) are suitable to assess the iron content in distinct brain regions. In this prospective, explorative study the iron accumulation in deep gray matter nuclei (DGM) in myotonic dystrophy type 1 (DM1) and 2 (DM2) and its clinical and neuro-cognitive relevance using susceptibility and R2* mapping was examined. Twelve classical DM1, four childhood-onset DM1 (DM1c.o.), twelve DM2 patients and twenty-nine matched healthy controls underwent MRI at 3 Tesla, neurological and neuro-cognitive tests. Susceptibility, R2* and volumes were determined for eleven DGM structures and compared between patients and controls. Twelve classical DM1, four childhood-onset DM1, and 12 DM2 patients as well as 29 matched healthy controls underwent MRI at 3 Tesla, and neurological and neuro-cognitive tests. Susceptibility, R2* and volumes were determined for 11 DGM structures and compared between patients and controls. Iron accumulation in DGM reflected by R2* or susceptibility was found in the putamen and accumbens of DM1 and in DM2, but was more widespread in DM1 (caudate, pallidum, hippocampus, subthalamic nucleus, thalamus, and substantia nigra). Opposed changes of R2* or susceptibility were detected in caudate, putamen and accumbens in the childhood-onset DM1 patients compared to classical DM1. R2* or susceptibility alterations in DGM were significantly associated with clinical symptoms including muscular weakness (DM1), daytime sleepiness (DM1), depression (DM2), and with specific cognitive deficits in DM1 and DM2.
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Affiliation(s)
- Sevda Ates
- Department of Neurology, St. Josef Hospital, Ruhr-University Bochum, Bochum, Germany
| | - Andreas Deistung
- Department of Radiology, University Hospital Halle (Saale), Halle (Saale), Germany.,Medical Physics Group, Institute of Diagnostic and Interventional Radiology, Jena University Hospital, Friedrich Schiller-University, Jena, Germany
| | - Ruth Schneider
- Department of Neurology, St. Josef Hospital, Ruhr-University Bochum, Bochum, Germany
| | - Christian Prehn
- Department of Neurology, St. Josef Hospital, Ruhr-University Bochum, Bochum, Germany
| | - Carsten Lukas
- Institute of Neuroradiology, St. Josef Hospital, Ruhr-University Bochum, Bochum, Germany.,Department of Diagnostic and Interventional Radiology and Nuclear Medicine, St. Josef Hospital, Ruhr-University Bochum, Bochum, Germany
| | - Jürgen R Reichenbach
- Medical Physics Group, Institute of Diagnostic and Interventional Radiology, Jena University Hospital, Friedrich Schiller-University, Jena, Germany
| | | | - Barbara Bellenberg
- Institute of Neuroradiology, St. Josef Hospital, Ruhr-University Bochum, Bochum, Germany.,Department of Diagnostic and Interventional Radiology and Nuclear Medicine, St. Josef Hospital, Ruhr-University Bochum, Bochum, Germany
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11
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History of fatigue in multiple sclerosis is associated with grey matter atrophy. Sci Rep 2019; 9:14781. [PMID: 31611598 PMCID: PMC6791855 DOI: 10.1038/s41598-019-51110-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Accepted: 09/12/2019] [Indexed: 11/19/2022] Open
Abstract
Fatigue in multiple sclerosis (MS) has been associated with brain damage with low replicability. Temporal fatigue fluctuations have not been considered. We assessed whether sustained fatigue (SF) associates more strongly with grey matter (GM) changes than reversible fatigue (RF). Patients were stratified into three groups according to historical fatigue levels: SF (n = 30, i.e. patients who reported fatigue at the latest ≥2 assessments), RF (n = 31, i.e. patients not fatigued at the latest assessment, but reported fatigue previously), and never fatigued (NF, n = 37). Groups were compared for brain GM volume using cross-sectional voxel-based and volumetric analyses of 3T T1-weighted MRI. Confounding effects of depression and related medications were also investigated. SF and RF patients showed similar anatomical distribution of GM atrophy. While we robustly replicated the anatomical patterns of GM atrophy described in previous work, we also found an association between hippocampal atrophy and fatigue. Depression showed confounding effects in frontal, parietal, occipital, accumbal and thalamic regions. Assessed treatments showed confounding effects in frontal, parietal and striatal areas. Our results suggest that history of clinically-relevant fatigue in currently non-fatigued patients is associated with GM atrophy, potentially explaining inconsistent findings of previous studies that stratified patients using a single fatigue assessment.
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12
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Rudyk C, Dwyer Z, McNeill J, Salmaso N, Farmer K, Prowse N, Hayley S. Chronic unpredictable stress influenced the behavioral but not the neurodegenerative impact of paraquat. Neurobiol Stress 2019; 11:100179. [PMID: 31304199 PMCID: PMC6599913 DOI: 10.1016/j.ynstr.2019.100179] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 05/03/2019] [Accepted: 05/30/2019] [Indexed: 01/09/2023] Open
Abstract
The impact of psychological stressors on the progression of motor and non-motor disturbances observed in Parkinson's disease (PD) has received little attention. Given that PD likely results from many different environmental “hits”, we were interested in whether a chronic unpredictable stressor regimen would act additively or possibly even synergistically to augment the impact of the toxicant, paraquat, which has previously been linked to PD. Our findings support the contention that paraquat itself acted as a systemic stressor, with the pesticide increasing plasma corticosterone, as well as altering glucocorticoid receptor (GR) expression in the hippocampus. Furthermore, stressed mice that also received paraquat displayed synergistic motor coordination impairment on a rotarod test and augmented signs of anhedonia (sucrose preference test). The individual stressor and paraquat treatments also caused a range of non-motor (e.g. open field, Y and plus mazes) deficits, but there were no signs of an interaction (neither additive nor synergistic) between the insults. Similarly, paraquat caused the expected loss of substantia nigra dopamine neurons and microglial activation, but this effect was not further influenced by the chronic stressor. Taken together, these results indicate that paraquat has many effects comparable to that of a more traditional stressor and that at least some behavioral measures (i.e. sucrose preference and rotarod) are augmented by the combined pesticide and stress treatments. Thus, although psychological stressors might not necessarily increase the neurodegenerative effects of the toxicant exposure, they may promote co-morbid behaviors pathology. Paraquat induced behavioral and neurochemical alterations similar to those induced by a chronic unpredictable stressor. Chronic unpredictable stress did not influence the degeneration of midbrain dopamine neurons or microglia activation. The paraquat and chronic stressor exposure resulted in augmented motor impairment and anhedonic-like behavior.
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Key Words
- AAR, alternate arm return
- ANOVA, analysis of variance
- BCA, bicinchoninic acid
- BDNF, brain derived neurotrophic factor
- CUS, chronic unpredictable stress
- Cytokine
- EDTA, ethylenediaminetetraacetic acid
- ELISA, enzyme-linked immunosorbent assay
- EPM, elevated plus maze
- FST, forced swim test
- GR, glucocorticoid receptor
- HPA, hypothalamus-pituitary adrenal
- IBA1, ionized calcium-binding adapter molecule 1
- Inflammatory
- MMx, Micromax
- Microglia
- PB, phosphate buffer
- PBS, phosphate buffered saline
- PD, Parkinson's disease
- PFA, paraformaldehyde
- PVDF, polyvinylidene difluoride
- Parkinson's
- RIPA, Radio Immuno Precipitation Assay
- RR, rotarod
- SAB, spontaneous alternation behavior
- SAR, same arm return
- SDS, sodium dodecyl sulphate
- SNc, substantia nigra pars compacta
- SPT, sucrose preference test
- Stress
- TH, tyrosine hydroxylase
- Toxicity
- VTA, ventral tegmental area
- pGR, phosphate glucocorticoid receptor
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Affiliation(s)
- Chris Rudyk
- Department of Neuroscience, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada, K1S 5B6
| | - Zach Dwyer
- Department of Neuroscience, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada, K1S 5B6
| | - Jessica McNeill
- Department of Neuroscience, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada, K1S 5B6
| | - Natalina Salmaso
- Department of Neuroscience, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada, K1S 5B6
| | - Kyle Farmer
- Department of Neuroscience, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada, K1S 5B6.,Department of Neurology, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - Natalie Prowse
- Department of Neuroscience, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada, K1S 5B6
| | - Shawn Hayley
- Department of Neuroscience, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada, K1S 5B6
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13
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Fontes K, Rohlicek CV, Saint-Martin C, Gilbert G, Easson K, Majnemer A, Marelli A, Chakravarty MM, Brossard-Racine M. Hippocampal alterations and functional correlates in adolescents and young adults with congenital heart disease. Hum Brain Mapp 2019; 40:3548-3560. [PMID: 31070841 DOI: 10.1002/hbm.24615] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Revised: 03/30/2019] [Accepted: 04/24/2019] [Indexed: 01/18/2023] Open
Abstract
There is a high prevalence of neurodevelopmental impairments in individuals living with congenital heart disease (CHD) and the neural correlates of these impairments are not yet fully understood. Recent studies have shown that hippocampal volume and shape differences may provide unique biomarkers for neurodevelopmental disorders. The hippocampus is vulnerable to early life injury, especially in populations at risk for hypoxemia or hemodynamic instability such as in neonates with CHD. We compared hippocampal gray and white matter volume and morphometry between youth born with CHD (n = 50) aged 16-24 years and healthy peers (n = 48). We also explored whether hippocampal gray and white matter volume and morphometry are associated with executive function and self-regulation deficits. To do so, participants underwent 3T brain magnetic resonance imaging and completed the self-reported Behavior Rating Inventory of Executive Function-Adult version. We found that youth with CHD had smaller hippocampal volumes (all statistics corrected for false discovery rate; q < 0.05) as compared to controls. We also observed significant smaller surface area bilaterally and inward displacement on the left hippocampus predominantly on the ventral side (q < 0.10) in the CHD group that were not present in the controls. Left CA1 and CA2/3 were negatively associated with working memory (p < .05). Here, we report, for the first-time, hippocampal morphometric alterations in youth born with CHD when compared to healthy peers, as well as, structure-function relationships between hippocampal volumes and executive function. These differences may reflect long lasting alterations in brain development specific to individual with CHD.
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Affiliation(s)
- Kimberly Fontes
- Advances in Brain and Child Health Development Research Laboratory, Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - Charles V Rohlicek
- Department of Pediatrics, Division of Cardiology, Montreal Children's Hospital, McGill University Health Centre, Montreal, Quebec, Canada
| | - Christine Saint-Martin
- Department of Medical Imaging, Division of Pediatric Radiology, Montreal Children's Hospital, McGill University Health Centre, Montreal, Quebec, Canada
| | | | - Kaitlyn Easson
- Advances in Brain and Child Health Development Research Laboratory, Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - Annette Majnemer
- School of Physical and Occupational Therapy, McGill University, Montreal, Quebec, Canada
| | - Ariane Marelli
- McGill Adult Unit for Congenital Heart Disease Excellence, McGill University, Montreal, Quebec, Canada
| | - M Mallar Chakravarty
- Computational Brain Anatomy Laboratory, Cerebral Imaging Centre - Douglas Mental Health University Institute, Verdun, Quebec, Canada.,Department of Psychiatry, McGill University, Montreal, Quebec, Canada.,Department of Biological and Biomedical Engineering, McGill University, Montreal, Quebec, Canada
| | - Marie Brossard-Racine
- Advances in Brain and Child Health Development Research Laboratory, Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada.,School of Physical and Occupational Therapy, McGill University, Montreal, Quebec, Canada.,Department of Pediatrics, Division of Neonatology, Montreal Children's Hospital, McGill University Health Centre, Montreal, Quebec, Canada
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14
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Rudyk CA, McNeill J, Prowse N, Dwyer Z, Farmer K, Litteljohn D, Caldwell W, Hayley S. Age and Chronicity of Administration Dramatically Influenced the Impact of Low Dose Paraquat Exposure on Behavior and Hypothalamic-Pituitary-Adrenal Activity. Front Aging Neurosci 2017; 9:222. [PMID: 28769783 PMCID: PMC5509760 DOI: 10.3389/fnagi.2017.00222] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Accepted: 06/26/2017] [Indexed: 01/19/2023] Open
Abstract
Little is known of the age-dependent and long-term consequences of low exposure levels of the herbicide and dopaminergic toxicant, paraquat. Thus, we assessed the dose-dependent effects of paraquat using a typical short-term (3 week) exposure procedure, followed by an assessment of the effects of chronic (16 weeks) exposure to a very low dose (1/10th of what previously induced dopaminergic neuronal damage). Short term paraquat treatment dose-dependently induced deficits in locomotion, sucrose preference and Y-maze performance. Chronic low dose paraquat treatment had a very different pattern of effects that were also dependent upon the age of the animal: in direct contrast to the short-term effects, chronic low dose paraquat increased sucrose consumption and reduced forced swim test (FST) immobility. Yet these effects were age-dependent, only emerging in mice older than 13 months. Likewise, Y-maze spontaneous alternations and home cage activity were dramatically altered as a function of age and paraquat chronicity. In both the short and long-term exposure studies, increased corticosterone and altered hippocampal glucocorticoid receptor (GR) levels were induced by paraquat, but surprisingly these effects were blunted in the older mice. Thus, paraquat clearly acts as a systemic stressor in terms of corticoid signaling and behavioral outcomes, but that paradoxical effects may occur with: (a) repeated exposure at; (b) very low doses; and (c) older age. Collectively, these data raise the possibility that repeated “hits” with low doses of paraquat in combination with aging processes might have promoted compensatory outcomes.
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Affiliation(s)
- Chris A Rudyk
- Hayley Laboratory, Department of Neuroscience, Carleton UniversityOttawa, ON, Canada
| | - Jessica McNeill
- Hayley Laboratory, Department of Neuroscience, Carleton UniversityOttawa, ON, Canada
| | - Natalie Prowse
- Hayley Laboratory, Department of Neuroscience, Carleton UniversityOttawa, ON, Canada
| | - Zach Dwyer
- Hayley Laboratory, Department of Neuroscience, Carleton UniversityOttawa, ON, Canada
| | - Kyle Farmer
- Hayley Laboratory, Department of Neuroscience, Carleton UniversityOttawa, ON, Canada
| | - Darcy Litteljohn
- Hayley Laboratory, Department of Neuroscience, Carleton UniversityOttawa, ON, Canada
| | - Warren Caldwell
- Hayley Laboratory, Department of Neuroscience, Carleton UniversityOttawa, ON, Canada
| | - Shawn Hayley
- Hayley Laboratory, Department of Neuroscience, Carleton UniversityOttawa, ON, Canada
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15
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Lee J, Im SJ, Lee SG, Stadlin A, Son JW, Shin CJ, Ju G, Lee SI, Kim S. Volume of hippocampal subfields in patients with alcohol dependence. Psychiatry Res Neuroimaging 2016; 258:16-22. [PMID: 27829188 DOI: 10.1016/j.pscychresns.2016.10.009] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 10/27/2016] [Accepted: 10/28/2016] [Indexed: 01/04/2023]
Abstract
Alcohol-induced hippocampal atrophy has been well documented in many studies and is known to affect various subfields. Given the functional heterogeneity of these subfields, we investigated the precise effects of alcohol-induced damage in these areas. Twenty-six male patients with alcohol dependence (alcohol group) and twenty-six age-matched male healthy social drinkers were recruited from a mental health hospital and the community respectively, with the aim of comparing the hippocampal subfields between groups. Each participant underwent a 3T MRI scan. Hippocampal subfield volumes were estimated using an automated procedure and drinking history recorded using Lifetime Drinking History, Alcohol Use Disorder Identification Test, and the Brief Michigan Alcoholism Screening Test. The alcohol group showed a lower total hippocampus volume, specifically in the left presubiculum, fimbria, and bilateral subiculum. Regression analysis assessing the influence of age and group showed that group was a more significant factor than age in most subfields. Our findings suggest that alcohol dependence alters hippocampal subfield volumes. Further longitudinal studies on the interaction of structural and neurocognitive changes would improve our understanding of brain structural changes resulting from long-term alcohol consumption.
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Affiliation(s)
- Jeonghwan Lee
- Department of Psychiatry, Chungbuk National University College of Medicine, Cheongju, South Korea
| | | | | | - Alfreda Stadlin
- Department of Anatomy, Chungbuk National University College of Medicine, Cheongju, South Korea
| | - Jung-Woo Son
- Department of Psychiatry, Chungbuk National University College of Medicine, Cheongju, South Korea
| | - Chul-Jin Shin
- Department of Psychiatry, Chungbuk National University College of Medicine, Cheongju, South Korea
| | - Gawon Ju
- Department of Psychiatry, Chungbuk National University College of Medicine, Cheongju, South Korea
| | - Sang-Ick Lee
- Department of Psychiatry, Chungbuk National University College of Medicine, Cheongju, South Korea
| | - Siekyeong Kim
- Department of Psychiatry, Chungbuk National University College of Medicine, Cheongju, South Korea.
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16
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Munive V, Santi A, Torres-Aleman I. A Concerted Action Of Estradiol And Insulin Like Growth Factor I Underlies Sex Differences In Mood Regulation By Exercise. Sci Rep 2016; 6:25969. [PMID: 27170462 PMCID: PMC4864325 DOI: 10.1038/srep25969] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Accepted: 04/22/2016] [Indexed: 12/31/2022] Open
Abstract
Mood homeostasis present sexually dimorphic traits which may explain sex differences in the incidence of mood disorders. We explored whether diverse behavioral-setting components of mood may be differentially regulated in males and females by exercise, a known modulator of mood. We found that exercise decreases anxiety only in males. Conversely, exercise enhanced resilience to stress and physical arousal, two other important components of mood, only in females. Because exercise increases brain input of circulating insulin-like growth factor I (IGF-I), a potent modulator of mood, we explored whether sex-specific actions of exercise on mood homeostasis relate to changes in brain IGF-I input. We found that exercise increased hippocampal IGF-I levels only in cycling females. Underlying mechanism involved activation of estrogen (E2) receptors in brain vessels that led to increased uptake of serum IGF-I as E2 was found to stimulate IGF-I uptake in brain endothelial cells. Indeed, modulatory effects of exercise on mood were absent in female mice with low serum IGF-I levels or after either ovariectomy or administration of an E2 receptor antagonist. These results suggest that sex-specific brain IGF-I responses to physiological stimuli such as exercise contribute to dimorphic mood homeostasis that may explain sex differences in affective disorders.
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Affiliation(s)
- Victor Munive
- Cajal Institute, CSIC, Madrid, Spain.,CIBERNED, Madrid, Spain.,Cajal Institute, CSIC, Madrid, Spain
| | - Andrea Santi
- Cajal Institute, CSIC, Madrid, Spain.,CIBERNED, Madrid, Spain.,Cajal Institute, CSIC, Madrid, Spain
| | - Ignacio Torres-Aleman
- Cajal Institute, CSIC, Madrid, Spain.,CIBERNED, Madrid, Spain.,Cajal Institute, CSIC, Madrid, Spain
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17
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Salvador R, Vega D, Pascual JC, Marco J, Canales-Rodríguez EJ, Aguilar S, Anguera M, Soto A, Ribas J, Soler J, Maristany T, Rodríguez-Fornells A, Pomarol-Clotet E. Converging Medial Frontal Resting State and Diffusion-Based Abnormalities in Borderline Personality Disorder. Biol Psychiatry 2016; 79:107-16. [PMID: 25524755 DOI: 10.1016/j.biopsych.2014.08.026] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Revised: 08/01/2014] [Accepted: 08/25/2014] [Indexed: 01/07/2023]
Abstract
BACKGROUND The psychological profile of patients with borderline personality disorder (BPD), with impulsivity and emotional dysregulation as core symptoms, has guided the search for abnormalities in specific brain areas such as the hippocampal-amygdala complex and the frontomedial cortex. However, whole-brain imaging studies so far have delivered highly heterogeneous results involving different brain locations. METHODS Functional resting-state and diffusion magnetic resonance imaging data were acquired in patients with BPD and in an equal number of matched control subjects (n = 60 for resting and n = 43 for diffusion). While mean diffusivity and fractional anisotropy brain images were generated from diffusion data, amplitude of low-frequency fluctuations and global brain connectivity images were used for the first time to evaluate BPD-related brain abnormalities from resting functional acquisitions. RESULTS Whole-brain analyses using a p = .05 corrected threshold showed a convergence of alterations in BPD patients in genual and perigenual structures, with frontal white matter fractional anisotropy abnormalities partially encircling areas of increased mean diffusivity and global brain connectivity. Additionally, a cluster of enlarged amplitude of low-frequency fluctuations (high resting activity) was found involving part of the left hippocampus and amygdala. In turn, this cluster showed increased resting functional connectivity with the anterior cingulate. CONCLUSIONS With a multimodal approach and without using a priori selected regions, we prove that structural and functional abnormality in BPD involves both temporolimbic and frontomedial structures as well as their connectivity. These structures have been previously related to behavioral and clinical symptoms in patients with BPD.
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Affiliation(s)
- Raymond Salvador
- Fundació per a la Investigació i Docència María Angustias Giménez (RS, EJC-R, MA, EP-C), Germanes Hospitalaries, Barcelona.; Centro de Investigación Biomedica en Red de Salud Mental (RS, JCP, EJC-R, MA, JS, EP-C), Barcelona.
| | - Daniel Vega
- Servei de Psiquiatria i Salut Mental (DV, AS, JR), Consorci Sanitari de l'Anoia, Igualada.; Departament de Psiquiatria i Medicina Legal & Institut de Neurociències (DV), Universitat Autònoma de Barcelona
| | - Juan Carlos Pascual
- Centro de Investigación Biomedica en Red de Salud Mental (RS, JCP, EJC-R, MA, JS, EP-C), Barcelona; Department of Psychiatry (JCP, JS), Hospital de la Santa Creu i Sant Pau, Barcelona.; Institut d'Investigació Biomèdica-Sant Pau (JCP, JS), Universitat Autònoma de Barcelona, Barcelona
| | - Josep Marco
- Faculty of Psychology (JM, AR-F), University of Barcelona, Bellvitge Hospital, Barcelona
| | - Erick Jorge Canales-Rodríguez
- Fundació per a la Investigació i Docència María Angustias Giménez (RS, EJC-R, MA, EP-C), Germanes Hospitalaries, Barcelona.; Centro de Investigación Biomedica en Red de Salud Mental (RS, JCP, EJC-R, MA, JS, EP-C), Barcelona
| | - Salvatore Aguilar
- Benito Menni-Centre Assistencial en Salut Mental (SA), Sant Boi de Llobregat.; Psychiatry and Clinical Psychology Programme (SA), Universitat Autònoma de Barcelona, Barcelona
| | - Maria Anguera
- Fundació per a la Investigació i Docència María Angustias Giménez (RS, EJC-R, MA, EP-C), Germanes Hospitalaries, Barcelona.; Centro de Investigación Biomedica en Red de Salud Mental (RS, JCP, EJC-R, MA, JS, EP-C), Barcelona
| | - Angel Soto
- Servei de Psiquiatria i Salut Mental (DV, AS, JR), Consorci Sanitari de l'Anoia, Igualada
| | - Joan Ribas
- Servei de Psiquiatria i Salut Mental (DV, AS, JR), Consorci Sanitari de l'Anoia, Igualada
| | - Joaquim Soler
- Centro de Investigación Biomedica en Red de Salud Mental (RS, JCP, EJC-R, MA, JS, EP-C), Barcelona; Department of Psychiatry (JCP, JS), Hospital de la Santa Creu i Sant Pau, Barcelona.; Institut d'Investigació Biomèdica-Sant Pau (JCP, JS), Universitat Autònoma de Barcelona, Barcelona
| | | | | | - Edith Pomarol-Clotet
- Fundació per a la Investigació i Docència María Angustias Giménez (RS, EJC-R, MA, EP-C), Germanes Hospitalaries, Barcelona.; Centro de Investigación Biomedica en Red de Salud Mental (RS, JCP, EJC-R, MA, JS, EP-C), Barcelona
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18
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Jin J, Maren S. Prefrontal-Hippocampal Interactions in Memory and Emotion. Front Syst Neurosci 2015; 9:170. [PMID: 26696844 PMCID: PMC4678200 DOI: 10.3389/fnsys.2015.00170] [Citation(s) in RCA: 199] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Accepted: 11/23/2015] [Indexed: 11/22/2022] Open
Abstract
The hippocampal formation (HPC) and medial prefrontal cortex (mPFC) have well-established roles in memory encoding and retrieval. However, the mechanisms underlying interactions between the HPC and mPFC in achieving these functions is not fully understood. Considerable research supports the idea that a direct pathway from the HPC and subiculum to the mPFC is critically involved in cognitive and emotional regulation of mnemonic processes. More recently, evidence has emerged that an indirect pathway from the HPC to the mPFC via midline thalamic nucleus reuniens (RE) may plays a role in spatial and emotional memory processing. Here we will consider how bidirectional interactions between the HPC and mPFC are involved in working memory, episodic memory and emotional memory in animals and humans. We will also consider how dysfunction in bidirectional HPC-mPFC pathways contributes to psychiatric disorders.
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Affiliation(s)
- Jingji Jin
- Department of Psychology and Institute for Neuroscience, Texas A&M University College Station, TX, USA
| | - Stephen Maren
- Department of Psychology and Institute for Neuroscience, Texas A&M University College Station, TX, USA
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19
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Hölter SM, Garrett L, Einicke J, Sperling B, Dirscherl P, Zimprich A, Fuchs H, Gailus-Durner V, Hrabě de Angelis M, Wurst W. Assessing Cognition in Mice. ACTA ACUST UNITED AC 2015; 5:331-358. [DOI: 10.1002/9780470942390.mo150068] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Sabine M. Hölter
- Institute of Developmental Genetics, Helmholtz Zentrum München, German Research Center for Environmental Health; Munich Germany
- German Mouse Clinic, Helmholtz Zentrum München; Munich Germany
| | - Lillian Garrett
- Institute of Developmental Genetics, Helmholtz Zentrum München, German Research Center for Environmental Health; Munich Germany
- German Mouse Clinic, Helmholtz Zentrum München; Munich Germany
| | - Jan Einicke
- Institute of Developmental Genetics, Helmholtz Zentrum München, German Research Center for Environmental Health; Munich Germany
- German Mouse Clinic, Helmholtz Zentrum München; Munich Germany
| | - Bettina Sperling
- Institute of Developmental Genetics, Helmholtz Zentrum München, German Research Center for Environmental Health; Munich Germany
- German Mouse Clinic, Helmholtz Zentrum München; Munich Germany
| | - Petra Dirscherl
- Institute of Developmental Genetics, Helmholtz Zentrum München, German Research Center for Environmental Health; Munich Germany
| | - Annemarie Zimprich
- Institute of Developmental Genetics, Helmholtz Zentrum München, German Research Center for Environmental Health; Munich Germany
- German Mouse Clinic, Helmholtz Zentrum München; Munich Germany
| | - Helmut Fuchs
- German Mouse Clinic, Helmholtz Zentrum München; Munich Germany
- Institute of Experimental Genetics, Helmholtz Zentrum München, German Research Center for Environmental Health; Munich Germany
| | - Valerie Gailus-Durner
- German Mouse Clinic, Helmholtz Zentrum München; Munich Germany
- Institute of Experimental Genetics, Helmholtz Zentrum München, German Research Center for Environmental Health; Munich Germany
| | - Martin Hrabě de Angelis
- German Mouse Clinic, Helmholtz Zentrum München; Munich Germany
- Institute of Experimental Genetics, Helmholtz Zentrum München, German Research Center for Environmental Health; Munich Germany
- Technical University of Munich, Department of Experimental Genetics; Munich Germany
- German Center for Diabetes Research; Neuherberg Germany
| | - Wolfgang Wurst
- Institute of Developmental Genetics, Helmholtz Zentrum München, German Research Center for Environmental Health; Munich Germany
- Technical University of Munich, Department of Developmental Genetics; Munich Germany
- German Center for Neurodegenerative Diseases; Munich Germany
- Munich Cluster for Systems Neurology (SyNergy); Munich Germany
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Abdolmaleky HM, Pajouhanfar S, Faghankhani M, Joghataei MT, Mostafavi A, Thiagalingam S. Antipsychotic drugs attenuate aberrant DNA methylation of DTNBP1 (dysbindin) promoter in saliva and post-mortem brain of patients with schizophrenia and Psychotic bipolar disorder. Am J Med Genet B Neuropsychiatr Genet 2015; 168:687-96. [PMID: 26285059 DOI: 10.1002/ajmg.b.32361] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Accepted: 07/31/2015] [Indexed: 12/13/2022]
Abstract
Due to the lack of genetic association between individual genes and schizophrenia (SCZ) pathogenesis, the current consensus is to consider both genetic and epigenetic alterations. Here, we report the examination of DNA methylation status of DTNBP1 promoter region, one of the most credible candidate genes affected in SCZ, assayed in saliva and post-mortem brain samples. The Illumina DNA methylation profiling and bisulfite sequencing of representative samples were used to identify methylation status of the DTNBP1 promoter region. Quantitative methylation specific PCR (qMSP) was employed to assess methylation of DTNBP1 promoter CpGs flanking a SP1 binding site in the saliva of SCZ patients, their first-degree relatives and control subjects (30, 15, and 30/group, respectively) as well as in post-mortem brains of patients with SCZ and bipolar disorder (BD) versus controls (35/group). qRT-PCR was used to assess DTNBP1 expression. We found DNA hypermethylation of DTNBP1 promoter in the saliva of SCZ patients (∼12.5%, P = 0.036), particularly in drug-naïve patients (∼20%, P = 0.011), and a trend toward hypermethylation in their first-degree relatives (P = 0.085) versus controls. Analysis of post-mortem brain samples revealed an inverse correlation between DTNBP1 methylation and expression, and normalization of this epigenetic change by classic antipsychotic drugs. Additionally, BD patients with psychotic depression exhibited higher degree of methylation versus other BD patients (∼80%, P = 0.025). DTNBP1 promoter DNA methylation may become a key element in a panel of biomarkers for diagnosis, prevention, or therapy in SCZ and at risk individuals pending confirmatory studies with larger sample sizes to attain a higher degree of significance.
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Affiliation(s)
- Hamid M Abdolmaleky
- Departments of Medicine (Biomedical Genetics Section), Genetics & Genomics, Boston University School of Medicine, Boston, Massachusetts.,Mental Health Research Center, Department of Psychiatry, Iran University of Medical Sciences, Tehran, Iran
| | - Sara Pajouhanfar
- Mental Health Research Center, Department of Psychiatry, Iran University of Medical Sciences, Tehran, Iran
| | | | - Mohammad Taghi Joghataei
- Cellular and Molecular Research Center, Department of Anatomy, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Ashraf Mostafavi
- Arian Salamat Counselling and Nursing Services Centre, Tehran, Iran
| | - Sam Thiagalingam
- Departments of Medicine (Biomedical Genetics Section), Genetics & Genomics, Boston University School of Medicine, Boston, Massachusetts.,Department of Pathology and Laboratory Medicine, Boston University School of Medicine, Boston, Massachusetts
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Affective context interferes with brain responses during cognitive processing in borderline personality disorder: fMRI evidence. Psychiatry Res 2015; 233:23-35. [PMID: 25982488 PMCID: PMC4465042 DOI: 10.1016/j.pscychresns.2015.04.006] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Revised: 01/21/2015] [Accepted: 04/21/2015] [Indexed: 01/18/2023]
Abstract
Emotion dysregulation in borderline personality disorder (BPD) is associated with loss of cognitive control in the face of intense negative emotion. Negative emotional context may interfere with cognitive processing through the dysmodulation of brain regions involved in regulation of emotion, impulse control, executive function and memory. Structural and metabolic brain abnormalities have been reported in these regions in BPD. Using novel fMRI protocols, we investigated the neural basis of negative affective interference with cognitive processing targeting these regions. Attention-driven Go No-Go and X-CPT (continuous performance test) protocols, using positive, negative and neutral Ekman faces, targeted the orbital frontal cortex (OFC) and the anterior cingulate cortex (ACC), respectively. A stimulus-driven Episodic Memory task, using images from the International Affective Pictures System, targeted the hippocampus (HIP). Participants comprised 23 women with BPD, who were compared with 15 healthy controls. When Negative>Positive faces were compared in the Go No-Go task, BPD subjects had hyper-activation relative to controls in areas reflecting task-relevant processing: the superior parietal/precuneus and the basal ganglia. Decreased activation was also noted in the OFC, and increased activation in the amygdala (AMY). In the X-CPT, BPD subjects again showed hyper-activation in task-relevant areas: the superior parietal/precuneus and the ACC. In the stimulus-driven Episodic Memory task, BPD subjects had decreased activation relative to controls in the HIP, ACC, superior parietal/precuneus, and dorsal prefrontal cortex (dPFC) (for encoding), and the ACC, dPFC, and HIP for retrieval of Negative>Positive pictures, reflecting impairment of task-relevant functions. Negative affective interference with cognitive processing in BPD differs from that in healthy controls and is associated with functional abnormalities in brain networks reported to have structural or metabolic abnormalities. Task demands exert a differential effect on the cognitive response to negative emotion in BPD compared with control subjects.
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Khan SA, Ryali V, Bhat PS, Prakash J, Srivastava K, Khanam S. The hippocampus and executive functions in depression. Ind Psychiatry J 2015; 24:18-22. [PMID: 26257478 PMCID: PMC4525426 DOI: 10.4103/0972-6748.160920] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND The relationship between depression, hippocampus (HC), and executive dysfunctions seems complex and has been the focus of research. Recent evidence indicates a possible role of HC in executive dysfunction seen in depression. No such studies on Indian population have been done. AIM To look for changes in HC and executive functions in depression. SETTINGS AND DESIGN A cross-sectional analytical controlled study. Sample size 50 (controls 50). MATERIALS AND METHODS Hippocampal volume and executive dysfunction was measured using structural magnetic resonance imaging (MRI) and Wisconsin Card Sorting Test (WCST), respectively. Findings on these two parameters were compared between depressives and healthy matched controls as well as between first episode (FE) and recurrent depressives and across the severity of depression (mild, moderate, and severe). STATISTICAL ANALYSIS Statistical Package for Social Sciences (SPSS) version 17 was used for analysis. Normally distributed continuous variables were analyzed with independent t-tests. Analysis of variance (ANOVA) was used for multiple comparisons. Categorical data were compared with χ(2) or Fisher's exact test. Clinical correlations were conducted using Pearson correlations. RESULT Depressed patients had a smaller left (Lt) hippocampal volume as well as poor performance on several measures of executive functions. Smaller hippocampal volume was found even in FE. Those who had a past burden of depressive illness had an even smaller hippocampal volume. No direct correlation was found between the HC volume and cognitive dysfunction. CONCLUSION Depressive illness appears to be toxic to the HC. The relationship between HC and executive dysfunction in depression may be indirect through its functional connections.
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Affiliation(s)
- Shahbaz Ali Khan
- Department of Psychiatry, Base Hospital, Delhi Cantonment, Delhi, India
| | - Vssr Ryali
- Commandant, Indian Naval Hospital Ship, Kochi, Kerala, India
| | - Pookala Shivaram Bhat
- Department of Psychiatry, Indian Naval Hospital Ship, Asvini, Mumbai, Maharashtra, India
| | - Jyoti Prakash
- Department of Psychiatry, Armed Forces Medical College, Pune, Maharashtra, India
| | - Kalpana Srivastava
- Department of Psychiatry, Armed Forces Medical College, Pune, Maharashtra, India
| | - Shagufta Khanam
- Scholar, Veer Kunwar Singh University, Ara, Patna, Bihar, India
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Yan G, Xuan Y, Dai Z, Shen Z, Zhang G, Xu H, Wu R. Brain metabolite changes in subcortical regions after exposure to cuprizone for 6 weeks: potential implications for schizophrenia. Neurochem Res 2015; 40:49-58. [PMID: 25347963 DOI: 10.1007/s11064-014-1464-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Revised: 09/29/2014] [Accepted: 10/23/2014] [Indexed: 02/05/2023]
Abstract
Cuprizone is a copper chelating agent able to selectively damage the white matter in the mouse brain. Recent studies have reported behavioral abnormalities relevant to some of schizophrenia symptoms. While associating white matter damage to the behavioral abnormalities, these previous studies did not rule out the possible impairment in neuronal functions in cuprizone-exposed mice. The aim of this study was to examine brain metabolites of the cuprizone-exposed mice by proton magnetic resonance spectroscopy ((1)H-MRS). The examined brain regions were the caudoputamen, midbrain, and thalamus; these subcortical regions showed different susceptibilities to cuprizone in terms of demyelination and oligodendrocyte loss in previous studies. Young C57BL/6 mice were fed a standard rodent chow without or with cuprizone (0.2 %) for 6 weeks. At the end, open-field and Y-maze tests were performed to measure the emotional and cognitive behaviors of the animals, followed by (1)H-MRS procedure to evaluate the brain metabolites. Cuprizone-exposure increased anxiety levels and impaired spatial working memory. The same treatment increased T2 signal intensity in the cerebral cortex, hippocampus, and caudoputamen, but not in the thalamus. Cuprizone-exposure decreased the concentrations of NAA and NAA+NAAG in caudoputamen, but not in thalamus and midbrain. It decreased levels of Cr+PCr, GPC+PCh and myo-inositol in all the three brain regions. These results provided neurochemical evidence for the impairment in neuronal functions by cuprizone treatment.
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Affiliation(s)
- Gen Yan
- Department of Radiology, Second Affiliated Hospital, Shantou University Medical College, Shantou, 515041, Guangdong, China
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24
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Sabaliauskas N, Shen H, Molla J, Gong QH, Kuver A, Aoki C, Smith SS. Neurosteroid effects at α4βδ GABAA receptors alter spatial learning and synaptic plasticity in CA1 hippocampus across the estrous cycle of the mouse. Brain Res 2014; 1621:170-86. [PMID: 25542386 DOI: 10.1016/j.brainres.2014.12.026] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Revised: 12/08/2014] [Accepted: 12/10/2014] [Indexed: 11/26/2022]
Abstract
Fluctuations in circulating levels of ovarian hormones have been shown to regulate cognition (Sherwin and Grigorova, 2011. Fertil. Steril. 96, 399-403; Shumaker et al., 2004. JAMA. 291, 2947-2958), but increases in estradiol on the day of proestrus yield diverse outcomes: In vivo induction of long-term potentiation (LTP), a model of learning, is reduced in the morning, but optimal in the afternoon (Warren et al., 1995. Brain Res. 703, 26-30). The mechanism underlying this discrepancy is not known. Here, we show that impairments in both CA1 hippocampal LTP and spatial learning observed on the morning of proestrus are due to increased dendritic expression of α4βδ GABAA receptors (GABARs) on CA1 pyramidal cells, as assessed by electron microscopic (EM) techniques, compared with estrus and diestrus. LTP induction and spatial learning were robust, however, when assessed on the morning of proestrus in α4-/- mice, implicating these receptors in mediating impaired plasticity. Although α4βδ expression remained elevated on the afternoon of proestrus, increases in 3α-OH-THP (3α-OH-5α-pregnan-20-one) decreased inhibition by reducing outward current through α4βδ GABARs (Shen et al., 2007. Nat. Neurosci. 10, 469-477), in contrast to the usual effect of this steroid to enhance inhibition. Proestrous levels of 3α-OH-THP reversed the deficits in LTP and spatial learning, an effect prevented by the inactive metabolite 3β-OH-THP (10 mg/kg, i.p.), which antagonizes actions of 3α-OH-THP. In contrast, administration of 3α-OH-THP (10 mg/kg, i.p.) on the morning of proestrus improved spatial learning scores 150-300%. These findings suggest that cyclic fluctuations in ovarian steroids can induce changes in cognition via α4βδ GABARs that are dependent upon 3α-OH-THP. This article is part of a Special Issue entitled SI: Brain and Memory.
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Affiliation(s)
- Nicole Sabaliauskas
- Department of Physiology and Pharmacology, SUNY Downstate Medical Center, 450 Clarkson Ave., Brooklyn, NY 11203, USA; Center for Neural Science, New York University, 4 Washington Place, New York, NY 10003, USA
| | - Hui Shen
- Department of Physiology and Pharmacology, SUNY Downstate Medical Center, 450 Clarkson Ave., Brooklyn, NY 11203, USA; School of Biomedical Engineering, Tianjin Medical University, No. 22 Qixiangtai Road, Heping District, Tianjin 300070, China
| | - Jonela Molla
- Department of Physiology and Pharmacology, SUNY Downstate Medical Center, 450 Clarkson Ave., Brooklyn, NY 11203, USA
| | - Qi Hua Gong
- Department of Physiology and Pharmacology, SUNY Downstate Medical Center, 450 Clarkson Ave., Brooklyn, NY 11203, USA
| | - Aarti Kuver
- Department of Physiology and Pharmacology, SUNY Downstate Medical Center, 450 Clarkson Ave., Brooklyn, NY 11203, USA
| | - Chiye Aoki
- Center for Neural Science, New York University, 4 Washington Place, New York, NY 10003, USA
| | - Sheryl S Smith
- Department of Physiology and Pharmacology, SUNY Downstate Medical Center, 450 Clarkson Ave., Brooklyn, NY 11203, USA; The Robert F. Furchgott Center for Neural and Behavioral Science, SUNY Downstate Medical Center, 450 Clarkson Avenue, Brooklyn, NY 11203, USA.
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Effects of serotonin-2A receptor binding and gender on personality traits and suicidal behavior in borderline personality disorder. Psychiatry Res 2014; 222:140-8. [PMID: 24751216 PMCID: PMC4115284 DOI: 10.1016/j.pscychresns.2014.03.008] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Revised: 01/27/2014] [Accepted: 03/21/2014] [Indexed: 01/14/2023]
Abstract
Impulsivity and aggressiveness are personality traits associated with a vulnerability to suicidal behavior. Behavioral expression of these traits differs by gender and has been related to central serotonergic function. We assessed the relationships between serotonin-2A receptor function, gender, and personality traits in borderline personality disorder (BPD), a disorder characterized by impulsive-aggression and recurrent suicidal behavior. Participants, who included 33 BPD patients and 27 healthy controls (HC), were assessed for Axis I and II disorders with the Structured Clinical Interview for DSM-IV and the International Personality Disorders Examination, and with the Diagnostic Interview for Borderline Patients-Revised for BPD. Depressed mood, impulsivity, aggression, and temperament were assessed with standardized measures. Positron emission tomography with [(18)F]altanserin as ligand and arterial blood sampling was used to determine the binding potentials (BPND) of serotonin-2A receptors in 11 regions of interest. Data were analyzed using Logan graphical analysis, controlling for age and non-specific binding. Among BPD subjects, aggression, Cluster B co-morbidity, antisocial PD, and childhood abuse were each related to altanserin binding. BPND values predicted impulsivity and aggression in BPD females (but not BPD males), and in HC males (but not HC females.) Altanserin binding was greater in BPD females than males in every contrast, but it did not discriminate suicide attempters from non-attempters. Region-specific differences in serotonin-2A receptor binding related to diagnosis and gender predicted clinical expression of aggression and impulsivity. Vulnerability to suicidal behavior in BPD may be related to serotonin-2A binding through expression of personality risk factors.
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26
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Shimada H, Makizako H, Doi T, Yoshida D, Tsutsumimoto K, Anan Y, Uemura K, Lee S, Park H, Suzuki T. A large, cross-sectional observational study of serum BDNF, cognitive function, and mild cognitive impairment in the elderly. Front Aging Neurosci 2014; 6:69. [PMID: 24782766 PMCID: PMC3995061 DOI: 10.3389/fnagi.2014.00069] [Citation(s) in RCA: 117] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Accepted: 03/28/2014] [Indexed: 01/09/2023] Open
Abstract
Objective: The clinical relationship between brain-derived neurotrophic factor (BDNF) and cognitive function or mild cognitive impairment (MCI) is not well-understood. The purpose of this study was to identify the relationship between serum BDNF and cognitive function and MCI, and determine whether serum BDNF level might be a useful biomarker for assessing risk for MCI in older people. Materials and Methods: A total of 4463 individuals aged 65 years or older (mean age 72 years) participating in the study. We measured performance in a battery of neuropsychological and cognitive function tests; serum BDNF concentration. Results: Eight hundred twenty-seven participants (18.8%) had MCI. After adjustment for sex, age, education level, diabetes, and current smoking, serum BDNF was associated with poorer performance in the story memory, and digit symbol substitution task scores. Serum BDNF was marginally associated with the presence of MCI (odds ratio, 95% confidence interval: 1.41, 1.00–1.99) when BDNF was 1.5 SD lower than the mean value standardized for sex and age, education level, diabetes, and current smoking. Conclusion: Low serum BDNF was associated with lower cognitive test scores and MCI. Future prospective studies should establish the discriminative value of serum BDNF for the risk of MCI.
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Affiliation(s)
- Hiroyuki Shimada
- Department of Functioning Activation, Center for Gerontology and Social Science, National Center for Geriatrics and Gerontology , Obu , Japan
| | - Hyuma Makizako
- Department of Functioning Activation, Center for Gerontology and Social Science, National Center for Geriatrics and Gerontology , Obu , Japan
| | - Takehiko Doi
- Department of Functioning Activation, Center for Gerontology and Social Science, National Center for Geriatrics and Gerontology , Obu , Japan
| | - Daisuke Yoshida
- Department of Functioning Activation, Center for Gerontology and Social Science, National Center for Geriatrics and Gerontology , Obu , Japan
| | - Kota Tsutsumimoto
- Department of Functioning Activation, Center for Gerontology and Social Science, National Center for Geriatrics and Gerontology , Obu , Japan
| | - Yuya Anan
- Department of Functioning Activation, Center for Gerontology and Social Science, National Center for Geriatrics and Gerontology , Obu , Japan
| | - Kazuki Uemura
- Department of Functioning Activation, Center for Gerontology and Social Science, National Center for Geriatrics and Gerontology , Obu , Japan
| | - Sangyoon Lee
- Department of Functioning Activation, Center for Gerontology and Social Science, National Center for Geriatrics and Gerontology , Obu , Japan
| | - Hyuntae Park
- Research Institute, National Center for Geriatrics and Gerontology , Obu , Japan
| | - Takao Suzuki
- Research Institute, National Center for Geriatrics and Gerontology , Obu , Japan
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Khan Shahbaz A, Vssr R, Bhat PS, Prakash J, Srivastava K, Shagufta K. Structural changes and cognitive deficits in depression and their clinical correlates. Asian J Psychiatr 2014; 7:99-100. [PMID: 24524724 DOI: 10.1016/j.ajp.2013.09.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Accepted: 09/14/2013] [Indexed: 11/29/2022]
Affiliation(s)
- A Khan Shahbaz
- Department of Psychiatry, Military Hospital, Danapur, India.
| | - Ryali Vssr
- Comdt INHS Sanjeevni, Kochi, Kerala, India
| | - P S Bhat
- Dept of Psychiatry, AFMC, Pune, India
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28
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Asano M, Taki Y, Hashizume H, Takeuchi H, Thyreau B, Sassa Y, Asano K, Kawashima R. Correlations between brain structures and study time at home in healthy children: a longitudinal analysis. Brain Behav 2014; 4:801-11. [PMID: 25365804 PMCID: PMC4212108 DOI: 10.1002/brb3.278] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2013] [Revised: 07/31/2014] [Accepted: 08/07/2014] [Indexed: 01/16/2023] Open
Abstract
INTRODUCTION Like sleeping and eating habits, the study habits adopted by children when they are at home are important contributors to lifestyle and they affect cognitive ability. It has recently been reported that sleeping and eating habits change the brain structure of children. However, no research on the effect of study habits at home on the brain structure of children has been conducted thus far. We investigated the effects of study habits at home on the brain structures of healthy children by examining correlations between study time at home and changes in brain structure over the course of 3 years. METHODS We used the brain magnetic resonance images of 229 healthy children aged 5.6-18.4 years and computed the changes (time 2-time 1) in regional gray matter and white matter volume (rWMV) using voxel-based morphometry. Whole-brain multiple regression analysis revealed a significant positive correlation between study time at home and changes in rWMV in the right superior frontal gyrus (SFG). Behaviorally, we found a significant positive correlation between study time at home and change in the verbal comprehension index (VCI), one of the subscales of the Wechsler Intelligence Scale for Children-third edition (WISC-III). RESULTS AND CONCLUSIONS Given that the SFG is involved in memory control and that the VCI measures abilities related to vocabulary, our results indicate that greater SFG involvement in the memorization component of longer study times may result in greater increases in the number of axons and more axon branching and myelination, causing plastic changes in the neural network involved in memory processes.
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Affiliation(s)
- Michiko Asano
- Division of Developmental Cognitive Neuroscience, Institute of Development, Aging and Cancer, Tohoku University Sendai, Japan
| | - Yasuyuki Taki
- Division of Developmental Cognitive Neuroscience, Institute of Development, Aging and Cancer, Tohoku University Sendai, Japan ; Department of Nuclear Medicine & Radiology, Institute of Development, Aging and Cancer, Tohoku University Sendai, Japan ; Division of Medical Neuroimaging Analysis, Department of Community Medical Supports, Tohoku Medical Megabank Organization, Tohoku University Sendai, Japan
| | - Hiroshi Hashizume
- Division of Developmental Cognitive Neuroscience, Institute of Development, Aging and Cancer, Tohoku University Sendai, Japan
| | - Hikaru Takeuchi
- Division of Developmental Cognitive Neuroscience, Institute of Development, Aging and Cancer, Tohoku University Sendai, Japan
| | - Benjamin Thyreau
- Division of Developmental Cognitive Neuroscience, Institute of Development, Aging and Cancer, Tohoku University Sendai, Japan ; Division of Medical Neuroimaging Analysis, Department of Community Medical Supports, Tohoku Medical Megabank Organization, Tohoku University Sendai, Japan
| | - Yuko Sassa
- Division of Developmental Cognitive Neuroscience, Institute of Development, Aging and Cancer, Tohoku University Sendai, Japan
| | - Kohei Asano
- Division of Developmental Cognitive Neuroscience, Institute of Development, Aging and Cancer, Tohoku University Sendai, Japan
| | - Ryuta Kawashima
- Division of Developmental Cognitive Neuroscience, Institute of Development, Aging and Cancer, Tohoku University Sendai, Japan ; Smart Ageing International Research Centre, Institute of Development, Aging and Cancer, Tohoku University Sendai, Japan ; Department of Functional Brain Imaging, Institute of Development, Aging and Cancer, Tohoku University Sendai, Japan
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Fish oil provides robust and sustained memory recovery after cerebral ischemia: influence of treatment regimen. Physiol Behav 2013; 119:61-71. [PMID: 23770426 DOI: 10.1016/j.physbeh.2013.06.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Revised: 05/31/2013] [Accepted: 06/03/2013] [Indexed: 11/24/2022]
Abstract
We previously reported that long-term treatment with fish oil (FO) facilitates memory recovery after transient, global cerebral ischemia (TGCI), despite the presence of severe hippocampal damage. The present study tested whether this antiamnesic effect resulted from an action of FO on behavioral performance itself, or whether it resulted from an anti-ischemic action. Different treatment regimens were used that were distinguished from each other by their initiation or duration with regard to the onset of TGCI and memory assessment. Naive rats were trained in an eight-arm radial maze, subjected to TGCI (4-VO model, 15 min), and tested for memory performance up to 6 weeks after TGCI. Fish oil (docosahexaenoic acid, 300 mg/kg/day) was given orally according to one of the following regimens: regimen 1 (from 3 days prior to ischemia until 4 weeks post-ischemia), regimen 2 (from 3 days prior to ischemia until 1 week post-ischemia), and regimen 3 (from week 2 to week 5 post-ischemia). When administered according to regimens 1 and 2, FO abolished amnesia completely. This effect persisted for at least 5 weeks after discontinuing the treatment. Such an effect did not occur, however, in the group treated according to regimen 3. Hippocampal and cortical damage was not alleviated by FO. The present results demonstrate that FO-mediated memory recovery (or preservation) following TGCI is a reproducible, robust, and long-lasting effect. Moreover, such an effect was found with a relatively short period of treatment, provided it covered the first days prior to and after ischemia. This suggests that FO prevented amnesia by changing some acute, ischemia/reperfusion-triggered process and not by stimulating memory performance on its own.
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Hernan AE, Holmes GL, Isaev D, Scott RC, Isaeva E. Altered short-term plasticity in the prefrontal cortex after early life seizures. Neurobiol Dis 2012; 50:120-6. [PMID: 23064435 DOI: 10.1016/j.nbd.2012.10.007] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2012] [Revised: 08/30/2012] [Accepted: 10/03/2012] [Indexed: 01/31/2023] Open
Abstract
Seizures during development are a relatively common occurrence and are often associated with poor cognitive outcomes. Recent studies show that early life seizures alter the function of various brain structures and have long-term consequences on seizure susceptibility and behavioral regulation. While many neocortical functions could be disrupted by epileptic seizures, we have concentrated on studying the prefrontal cortex (PFC) as disturbance of PFC functions is involved in numerous co-morbid disorders associated with epilepsy. In the present work we report an alteration of short-term plasticity in the PFC in rats that have experienced early life seizures. The most robust alteration occurs in the layer II/III to layer V network of neurons. However short-term plasticity of layer V to layer V network was also affected, indicating that the PFC function is broadly influenced by early life seizures. These data strongly suggest that repetitive seizures early in development cause substantial alteration in PFC function, which may be an important component underlying cognitive deficits in individuals with a history of seizures during development.
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Affiliation(s)
- A E Hernan
- Department of Neurology, Neuroscience Center at Dartmouth, Geisel School of Medicine at Dartmouth, Lebanon, NH 03766, USA.
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Sildenafil provides sustained neuroprotection in the absence of learning recovery following the 4-vessel occlusion/internal carotid artery model of chronic cerebral hypoperfusion in middle-aged rats. Brain Res Bull 2012; 90:58-65. [PMID: 22982173 DOI: 10.1016/j.brainresbull.2012.08.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2012] [Revised: 08/27/2012] [Accepted: 08/30/2012] [Indexed: 12/19/2022]
Abstract
In this study, we tested whether the phosphodiesterase-5 inhibitor sildenafil protects against neurodegeneration and facilitates recovery from learning deficits examined long after chronic cerebral hypoperfusion (CCH) induced by the 4-vessel occlusion/internal carotid artery (4-VO/ICA) model in middle-aged rats. Male Wistar rats (12-15 months of age) were subjected to permanent 3-stage 4-VO/ICA with an interstage interval of 4 days. Sildenafil (3 mg/kg, p.o.) was administered at one dose per day for 10 days, beginning soon after the first occlusion stage. Three months later, learning in a non-food-rewarded, eight-arm radial maze task was tested. Learning performance is expressed as the latency to find a goal box and the number of reference or working memory errors. Histological examination was performed 1-3 days after behavioral testing. In the vehicle-treated group, permanent 4-VO/ICA markedly disrupted learning performance and caused moderate-to-severe neurodegeneration in the CA1-CA4 subfields of the hippocampus (56.2%), dentate gyrus (DG; 19.2%), retrosplenial cortex (RS cortex; 47.4%), and parietal association cortex (PtA cortex; 38.2%). Sildenafil treatment did not prevent 4-VO/ICA-induced learning deficits, whereas neurodegeneration was significantly reduced in the CA1-CA4 subfields (30.5%), DG (7.2%), RS cortex (11.8%), and PtA cortex (6.5%). Advancing previous findings from our laboratory, this study suggests that while sildenafil can provide important neuroprotection in different brain regions of middle-aged rats subjected to CCH, such histological effect does not translate into cognitive recovery.
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Abstract
Advances in mouse neural circuit genetics, brain atlases, and behavioral assays provide a powerful system for modeling the genetic basis of cognition and psychiatric disease. However, a critical limitation of this approach is how to achieve concordance of mouse neurobiology with the ultimate goal of understanding the human brain. Previously, the common marmoset has shown promise as a genetic model system toward the linking of mouse and human studies. However, the advent of marmoset transgenic approaches will require an understanding of developmental principles in marmoset compared to mouse. In this study, we used gene expression analysis in marmoset brain to pose a series of fundamental questions on cortical development and evolution for direct comparison to existing mouse brain atlas expression data. Most genes showed reliable conservation of expression between marmoset and mouse. However, certain markers had strikingly divergent expression patterns. The lateral geniculate nucleus and pulvinar in the thalamus showed diversification of genetic organization between marmoset and mouse, suggesting they share some similarity. In contrast, gene expression patterns in early visual cortical areas showed marmoset-specific expression. In prefrontal cortex, some markers labeled architectonic areas and layers distinct between mouse and marmoset. Core hippocampus was conserved, while afferent areas showed divergence. Together, these results indicate that existing cortical areas are genetically conserved between marmoset and mouse, while differences in areal parcellation, afferent diversification, and layer complexity are associated with specific genes. Collectively, we propose that gene expression patterns in marmoset brain reveal important clues to the principles underlying the molecular evolution of cortical and cognitive expansion.
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Recinto P, Samant ARH, Chavez G, Kim A, Yuan CJ, Soleiman M, Grant Y, Edwards S, Wee S, Koob GF, George O, Mandyam CD. Levels of neural progenitors in the hippocampus predict memory impairment and relapse to drug seeking as a function of excessive methamphetamine self-administration. Neuropsychopharmacology 2012; 37:1275-87. [PMID: 22205547 PMCID: PMC3306889 DOI: 10.1038/npp.2011.315] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2011] [Revised: 11/02/2011] [Accepted: 11/13/2011] [Indexed: 12/18/2022]
Abstract
Methamphetamine affects the hippocampus, a brain region crucial for learning and memory, as well as relapse to drug seeking. Rats self-administered methamphetamine for 1 h twice weekly (intermittent-short-I-ShA), 1 h daily (limited-short-ShA), or 6 h daily (extended-long-LgA) for 22 sessions. After 22 sessions, rats from each access group were withdrawn from self-administration and underwent spatial memory (Y-maze) and working memory (T-maze) tests followed by extinction and reinstatement to methamphetamine seeking or received one intraperitoneal injection of 5-bromo-2'-deoxyuridine (BrdU) to label progenitors in the hippocampal subgranular zone (SGZ) during the synthesis phase. Two-hour-old and 28-day-old surviving BrdU-immunoreactive cells were quantified. I-ShA rats performed better on the Y-maze and had a greater number of 2-h-old SGZ BrdU cells than nondrug controls. LgA rats, but not ShA rats, performed worse on the Y- and T-maze and had a fewer number of 2-h-old SGZ BrdU cells than nondrug and I-ShA rats, suggesting that new hippocampal progenitors, decreased by methamphetamine, were correlated with impairment in the acquisition of new spatial cues. Analyses of addiction-related behaviors after withdrawal and extinction training revealed methamphetamine-primed reinstatement of methamphetamine-seeking behavior in all three groups (I-ShA, ShA, and LgA), and this effect was enhanced in LgA rats compared with I-ShA and ShA rats. Protracted withdrawal from self-administration enhanced the survival of SGZ BrdU cells, and methamphetamine seeking during protracted withdrawal enhanced Fos expression in the dentate gyrus and medial prefrontal cortex in LgA rats to a greater extent than in ShA and I-ShA rats. These results indicate that changes in the levels of the proliferation and survival of hippocampal neural progenitors and neuronal activation of hippocampal granule cells predict the effects of methamphetamine self-administration (limited vs extended access) on cognitive performance and relapse to drug seeking and may contribute to the impairments that perpetuate the addiction cycle.
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Affiliation(s)
- Patrick Recinto
- Skaggs School of Pharmacy and Pharmaceutical Sciences University of California San Diego, La Jolla, CA, USA
| | - Anjali Rose H Samant
- Committee on the Neurobiology of Addictive Disorders, The Scripps Research Institute, La Jolla, CA, USA
| | - Gustavo Chavez
- Committee on the Neurobiology of Addictive Disorders, The Scripps Research Institute, La Jolla, CA, USA
| | - Airee Kim
- Committee on the Neurobiology of Addictive Disorders, The Scripps Research Institute, La Jolla, CA, USA
| | - Clara J Yuan
- Skaggs School of Pharmacy and Pharmaceutical Sciences University of California San Diego, La Jolla, CA, USA
| | - Matthew Soleiman
- Committee on the Neurobiology of Addictive Disorders, The Scripps Research Institute, La Jolla, CA, USA
| | - Yanabel Grant
- Committee on the Neurobiology of Addictive Disorders, The Scripps Research Institute, La Jolla, CA, USA
| | - Scott Edwards
- Committee on the Neurobiology of Addictive Disorders, The Scripps Research Institute, La Jolla, CA, USA
| | - Sunmee Wee
- Committee on the Neurobiology of Addictive Disorders, The Scripps Research Institute, La Jolla, CA, USA
| | - George F Koob
- Skaggs School of Pharmacy and Pharmaceutical Sciences University of California San Diego, La Jolla, CA, USA
- Committee on the Neurobiology of Addictive Disorders, The Scripps Research Institute, La Jolla, CA, USA
| | - Olivier George
- Committee on the Neurobiology of Addictive Disorders, The Scripps Research Institute, La Jolla, CA, USA
| | - Chitra D Mandyam
- Skaggs School of Pharmacy and Pharmaceutical Sciences University of California San Diego, La Jolla, CA, USA
- Committee on the Neurobiology of Addictive Disorders, The Scripps Research Institute, La Jolla, CA, USA
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Lee JH, Kim J, Yoo SS. Real-time fMRI-based neurofeedback reinforces causality of attention networks. Neurosci Res 2012; 72:347-54. [DOI: 10.1016/j.neures.2012.01.002] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2011] [Revised: 01/10/2012] [Accepted: 01/11/2012] [Indexed: 11/24/2022]
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Enhanced oscillatory activity in the hippocampal-prefrontal network is related to short-term memory function after early-life seizures. J Neurosci 2011; 31:15397-406. [PMID: 22031886 DOI: 10.1523/jneurosci.2196-11.2011] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Neurological insults during development are associated with later impairments in learning and memory. Although remedial training can help restore cognitive function, the neural mechanisms of this recovery in memory systems are largely unknown. To examine this issue, we measured electrophysiological oscillatory activity in the hippocampus (both CA3 and CA1) and prefrontal cortex of adult rats that had experienced repeated seizures in the first weeks of life, while they were remedially trained on a delayed-nonmatch-to-sample memory task. Seizure-exposed rats showed initial difficulties learning the task but performed similarly to control rats after extra training. Whole-session analyses illustrated enhanced theta power in all three structures while seizure rats learned response tasks before the memory task. While performing the memory task, dynamic oscillation patterns revealed that prefrontal cortex theta power was increased among seizure-exposed rats. This enhancement appeared after the first memory-training steps using short delays and plateaued at the most difficult steps, which included both short and long delays. Further, seizure rats showed enhanced CA1-prefrontal cortex theta coherence in correct trials compared with incorrect trials when long delays were imposed, suggesting increased hippocampal-prefrontal cortex synchrony for the task in this group when memory demand was high. Seizure-exposed rats also showed heightened gamma power and coherence among all three structures during the trials. Our results demonstrate the first evidence of hippocampal-prefrontal enhancements following seizures in early development. Dynamic compensatory changes in this network and interconnected circuits may underpin cognitive rehabilitation following other neurological insults to higher cognitive systems.
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Catenoix H, Magnin M, Mauguière F, Ryvlin P. Evoked potential study of hippocampal efferent projections in the human brain. Clin Neurophysiol 2011; 122:2488-97. [PMID: 21669549 DOI: 10.1016/j.clinph.2011.05.007] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2011] [Revised: 04/14/2011] [Accepted: 05/15/2011] [Indexed: 11/24/2022]
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Ferreira EDF, Romanini CV, Mori MA, de Oliveira RMW, Milani H. Middle-aged, but not young, rats develop cognitive impairment and cortical neurodegeneration following the four-vessel occlusion/internal carotid artery model of chronic cerebral hypoperfusion. Eur J Neurosci 2011; 34:1131-40. [PMID: 21884555 DOI: 10.1111/j.1460-9568.2011.07824.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Permanent, stepwise occlusion of the vertebral arteries (VAs) and internal carotid arteries (ICAs) following the sequence VA→ICA→ICA, with an interstage interval (ISI, →) of 7 days, has been investigated as a four-vessel occlusion (4-VO)/ICA model of chronic cerebral hypoperfusion. This model has the advantage of not causing retinal damage. In young rats, however, 4-VO/ICA with an ISI of 7 days fails to cause behavioral sequelae. We hypothesized that such a long ISI would allow the brain to efficiently compensate for cerebral hypoperfusion, preventing the occurrence of cognitive impairment and neurodegeneration. The present study evaluated whether brain neurodegeneration and learning/memory deficits can be expressed by reducing the length of the ISI and whether aging influences the outcome. Young, male Wistar rats were subjected to 4-VO/ICA with different ISIs (5, 4, 3 or 2 days). An ISI of 4 days was used in middle-aged rats. Ninety days after 4-VO/ICA, the rats were tested for learning/memory impairment in a modified radial maze and then examined for neurodegeneration of the hippocampus and cerebral cortex. Regardless of the ISI, young rats were not cognitively impaired, although hippocampal damage was evident. Learning/memory deficits and hippocampal and cortical neurodegeneration occurred in middle-aged rats. The data indicate that 4-VO/ICA has no impact on the capacity of young rats to learn the radial maze task, despite 51% hippocampal cell death. Such resistance is lost in middle-aged animals, for which the most extensive neurodegeneration observed in both the hippocampus and cerebral cortex may be responsible.
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Affiliation(s)
- Emilene D Fiuza Ferreira
- Department of Pharmacology and Therapeutic, Health Science Center, State University of Maringá, Av. Colombo 5790, Maringá, Paraná, Brazil
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Sudai E, Croitoru O, Shaldubina A, Abraham L, Gispan I, Flaumenhaft Y, Roth-Deri I, Kinor N, Aharoni S, Ben-Tzion M, Yadid G. High cocaine dosage decreases neurogenesis in the hippocampus and impairs working memory. Addict Biol 2011; 16:251-60. [PMID: 20731634 DOI: 10.1111/j.1369-1600.2010.00241.x] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Drug addiction is a chronic brain disorder, characterized by the loss of the ability to control drug consumption. The neurobiology of addiction is traditionally thought to involve the mesocorticolimbic system of the brain. However, the hippocampus has received renewed interest for its potential role in addiction. Part of this attention is because of the fact that drugs of abuse are potent negative regulators of neurogenesis in the adult hippocampus and may as a result impair learning and memory. We investigated the effects of different dosages of contingent cocaine on cell proliferation and neurogenesis in the dentate gyrus of the hippocampus and on working memory during abstinence, using the water T-maze test, in adult rats. We found that cocaine, in addition to the changes it produces in the reward system, if taken in high doses, can attenuate the production and development of new neurons in the hippocampus, and reduce working memory.
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Affiliation(s)
- Einav Sudai
- Neuropharmacology Laboratory, The Mina & Everard Goodman Faculty of Life Sciences, Israel
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Gollo LL, Mirasso CR, Atienza M, Crespo-Garcia M, Cantero JL. Theta band zero-lag long-range cortical synchronization via hippocampal dynamical relaying. PLoS One 2011; 6:e17756. [PMID: 21408082 PMCID: PMC3050931 DOI: 10.1371/journal.pone.0017756] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2010] [Accepted: 02/09/2011] [Indexed: 11/19/2022] Open
Abstract
Growing evidence suggests that synchronization among distributed neuronal networks underlie functional integration in the brain. Neural synchronization is typically revealed by a consistent phase delay between neural responses generated in two separated sources. But the influence of a third neuronal assembly in that synchrony pattern remains largely unexplored. We investigate here the potential role of the hippocampus in determining cortico-cortical theta synchronization in different behavioral states during motor quiescent and while animals actively explore the environment. To achieve this goal, the two states were modeled with a recurrent network involving the hippocampus, as a relay element, and two distant neocortical sites. We found that cortico-cortical neural coupling accompanied higher hippocampal theta oscillations in both behavioral states, although the highest level of synchronization between cortical regions emerged during motor exploration. Local field potentials recorded from the same brain regions qualitatively confirm these findings in the two behavioral states. These results suggest that zero-lag long-range cortico-cortical synchronization is likely mediated by hippocampal theta oscillations in lower mammals as a function of cognitive demands and motor acts.
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Affiliation(s)
- Leonardo L. Gollo
- IFISC, Instituto de Física Interdisciplinar y Sistemas Complejos (CSIC-UIB), Campus Universitat de les Illes Balears, Palma de Mallorca, Spain
| | - Claudio R. Mirasso
- IFISC, Instituto de Física Interdisciplinar y Sistemas Complejos (CSIC-UIB), Campus Universitat de les Illes Balears, Palma de Mallorca, Spain
| | - Mercedes Atienza
- Laboratory of Functional Neuroscience, Spanish Network of Excellence for Research on Neurodegenerative Diseases (CIBERNED), University Pablo de Olavide, Sevilla, Spain
| | - Maite Crespo-Garcia
- Laboratory of Functional Neuroscience, Spanish Network of Excellence for Research on Neurodegenerative Diseases (CIBERNED), University Pablo de Olavide, Sevilla, Spain
| | - Jose L. Cantero
- Laboratory of Functional Neuroscience, Spanish Network of Excellence for Research on Neurodegenerative Diseases (CIBERNED), University Pablo de Olavide, Sevilla, Spain
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Wolf C, Jackson MC, Kissling C, Thome J, Linden DE. Dysbindin-1 genotype effects on emotional working memory. Mol Psychiatry 2011; 16:145-55. [PMID: 20010894 PMCID: PMC3044452 DOI: 10.1038/mp.2009.129] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2008] [Revised: 10/15/2009] [Accepted: 11/03/2009] [Indexed: 01/03/2023]
Abstract
We combined functional imaging and genetics to investigate the behavioral and neural effects of a dysbindin-1 (DTNBP1) genotype associated with the expression level of this important synaptic protein, which has been implicated in schizophrenia. On a working memory (WM) task for emotional faces, participants with the genotype related to increased expression showed higher WM capacity for happy faces compared with the genotype related to lower expression. Activity in several task-related brain areas with known DTNBP1 expression was increased, including hippocampal, temporal and frontal cortex. Although these increases occurred across emotions, they were mostly observed in areas whose activity correlated with performance for happy faces. This suggests effects of variability in DTNBP1 on emotion-specific WM capacity and region-specific task-related brain activation in humans. Synaptic effects of DTNBP1 implicate that altered dopaminergic and/or glutamatergic neurotransmission may be related to the increased WM capacity. The combination of imaging and genetics thus allows us to bridge the gap between the cellular/molecular and systems/behavioral level and extend the cognitive neuroscience approach to a comprehensive biology of cognition.
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Affiliation(s)
- Claudia Wolf
- Wolfson Centre for Cognitive and Clinical Neuroscience, School of Psychology, Bangor University, Brigantia Building, Bangor, LL57 2AS, UK
| | - Margaret C. Jackson
- Wolfson Centre for Cognitive and Clinical Neuroscience, School of Psychology, Bangor University, Brigantia Building, Bangor, LL57 2AS, UK
| | - Christian Kissling
- Laboratory of Molecular Psychiatry and Pharmacology, Institute of Life Science, School of Medicine, Swansea University, Singleton Park, Swansea, SA2 8PP, UK
| | - Johannes Thome
- Laboratory of Molecular Psychiatry and Pharmacology, Institute of Life Science, School of Medicine, Swansea University, Singleton Park, Swansea, SA2 8PP, UK
| | - David E.J. Linden
- Wolfson Centre for Cognitive and Clinical Neuroscience, School of Psychology, Bangor University, Brigantia Building, Bangor, LL57 2AS, UK
- North Wales Clinical School, Bangor University, Bangor, LL57 2AS, UK
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41
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Effect of pre- versus post-weaning environmental disturbances on social behaviour in mice. Neurosci Lett 2011; 488:221-4. [DOI: 10.1016/j.neulet.2010.11.033] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2010] [Revised: 11/05/2010] [Accepted: 11/11/2010] [Indexed: 01/04/2023]
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42
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Zhang JP, Burdick KE, Lencz T, Malhotra AK. Meta-analysis of genetic variation in DTNBP1 and general cognitive ability. Biol Psychiatry 2010; 68:1126-33. [PMID: 21130223 PMCID: PMC3026311 DOI: 10.1016/j.biopsych.2010.09.016] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2010] [Revised: 07/30/2010] [Accepted: 09/06/2010] [Indexed: 01/31/2023]
Abstract
BACKGROUND The human dystrobrevin binding protein 1 (DTNBP1) gene has been linked to risk for schizophrenia. Recent studies indicate that several single nucleotide polymorphisms (SNPs) in the DTNBP1 gene may also influence general cognitive ability in both schizophrenic patients and healthy control subjects. We examined the relationship between DTNBP1 SNPs and general cognitive ability in nonpsychiatric healthy samples via meta-analysis. METHODS MEDLINE search (12/31/09) yielded 11 articles examining DTNBP1 variation and general cognitive ability, of which 8 studies had data available encompassing 10 independent cohorts (total n = 7592). The phenotype was defined as either the first principal component score from multiple neuropsychological tests (Spearman's g) or full-scale IQ. Meta-analyses were conducted for nine SNPs for which cognitive data were available from at least three cohorts. For each SNP in each cohort, effect size was computed between major allele homozygotes and minor allele carriers; effect size was then pooled across studies using a random effect model. RESULTS Pooled effect sizes from two of the nine SNPs (rs1018381 and rs2619522) were -.123 and -.083, ps < .01, respectively, suggesting that the minor allele carriers of these SNPs had lower cognitive ability scores than the major allele homozygotes. Results remained significant after examining heterogeneity among samples and potential publication biases. Other SNPs did not show significant effects on general cognitive ability. CONCLUSIONS Genetic variation in DTNBP1 modestly influences general cognitive ability. Further studies are needed to elucidate the biological mechanisms that may account for this relationship.
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Affiliation(s)
| | - Katherine E. Burdick
- Division of Psychiatry Research, The Zucker Hillside Hospital, North Shore-Long Island Jewish Health System, Glen Oaks, NY, Center for Psychiatric Neurosciences, Feinstein Institute for Medical Research, Manhasset, NY, Department of Psychiatry and Behavioral Science, Albert Einstein College of Medicine, Bronx, NY
| | - Todd Lencz
- Division of Psychiatry Research, The Zucker Hillside Hospital, North Shore-Long Island Jewish Health System, Glen Oaks, NY, Center for Psychiatric Neurosciences, Feinstein Institute for Medical Research, Manhasset, NY, Department of Psychiatry and Behavioral Science, Albert Einstein College of Medicine, Bronx, NY, Department of Psychiatry, Hofstra University School of Medicine, Hempstead, NY
| | - Anil K. Malhotra
- Division of Psychiatry Research, The Zucker Hillside Hospital, North Shore-Long Island Jewish Health System, Glen Oaks, NY, Center for Psychiatric Neurosciences, Feinstein Institute for Medical Research, Manhasset, NY, Department of Psychiatry and Behavioral Science, Albert Einstein College of Medicine, Bronx, NY
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Swardfager W, Herrmann N, Marzolini S, Saleem M, Kiss A, Shammi P, Oh PI, Lanctôt KL. Cardiopulmonary Fitness Is Associated with Cognitive Performance in Patients with Coronary Artery Disease. J Am Geriatr Soc 2010; 58:1519-25. [DOI: 10.1111/j.1532-5415.2010.02966.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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44
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45
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Hyman JM, Zilli EA, Paley AM, Hasselmo ME. Working Memory Performance Correlates with Prefrontal-Hippocampal Theta Interactions but not with Prefrontal Neuron Firing Rates. Front Integr Neurosci 2010; 4:2. [PMID: 20431726 PMCID: PMC2861479 DOI: 10.3389/neuro.07.002.2010] [Citation(s) in RCA: 133] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2009] [Accepted: 01/24/2010] [Indexed: 11/30/2022] Open
Abstract
Performance of memory tasks is impaired by lesions to either the medial prefrontal cortex (mPFC) or the hippocampus (HPC); although how these two areas contribute to successful performance is not well understood. mPFC unit activity is temporally affected by hippocampal-theta oscillations, with almost half the mPFC population entrained to theta in behaving animals, pointing to theta interactions as the mechanism enabling collaborations between these two areas. mPFC neurons respond to sensory stimuli and responses in working memory tasks, though the function of these correlated firing rate changes remains unclear because similar responses are reported during mPFC dependent and independent tasks. Using a DNMS task we compared error trials vs. correct trials and found almost all mPFC cells fired at similar rates during both error and correct trials (92%), however theta-entrainment of mPFC neurons declined during error performance as only 17% of cells were theta-entrained (during correct trials 46% of the population was theta-entrained). Across the population, error and correct trials did not differ in firing rate, but theta-entrainment was impaired. Periods of theta-entrainment and firing rate changes appeared to be independent variables, and only theta-entrainment was correlated with successful performance, indicating mPFC-HPC theta-range interactions are the key to successful DNMS performance.
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Affiliation(s)
- James M Hyman
- Seamans Laboratory, Department of Psychiatry, Brain Research Center, University of British Columbia Vancouver, BC, Canada
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46
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Du Y, Wu X, Li L. Emotional learning enhances stimulus-specific top-down modulation of sensorimotor gating in socially reared rats but not isolation-reared rats. Behav Brain Res 2010; 206:192-201. [DOI: 10.1016/j.bbr.2009.09.012] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2009] [Revised: 09/03/2009] [Accepted: 09/07/2009] [Indexed: 11/16/2022]
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Sierksma AS, van den Hove DL, Steinbusch HW, Prickaerts J. Major depression, cognitive dysfunction and Alzheimer's disease: Is there a link? Eur J Pharmacol 2010; 626:72-82. [DOI: 10.1016/j.ejphar.2009.10.021] [Citation(s) in RCA: 92] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2009] [Revised: 09/29/2009] [Accepted: 10/06/2009] [Indexed: 11/30/2022]
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48
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Li L, Du Y, Li N, Wu X, Wu Y. Top–down modulation of prepulse inhibition of the startle reflex in humans and rats. Neurosci Biobehav Rev 2009; 33:1157-67. [DOI: 10.1016/j.neubiorev.2009.02.001] [Citation(s) in RCA: 173] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2008] [Revised: 02/02/2009] [Accepted: 02/04/2009] [Indexed: 10/21/2022]
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49
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Yang HJ, Wang H, Zhang Y, Xiao L, Clough RW, Browning R, Li XM, Xu H. Region-specific susceptibilities to cuprizone-induced lesions in the mouse forebrain: Implications for the pathophysiology of schizophrenia. Brain Res 2009; 1270:121-30. [PMID: 19306847 DOI: 10.1016/j.brainres.2009.03.011] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2009] [Revised: 03/03/2009] [Accepted: 03/05/2009] [Indexed: 01/13/2023]
Abstract
Cuprizone (CPZ) is a neurotoxic agent acting as a copper chelator. In our recent study, C57BL/6 mice given dietary CPZ (0.2%) showed impairments in spatial working memory, social interaction, and prepulse inhibition. These abnormalities are reminiscent of certain schizophrenia symptoms and are not likely due to damage in the whole brain or in any single white matter tract/brain region. We hypothesized that white matter damage resulting from CPZ-treatment may be site-specific rather than universal. We examined the forebrains of C57BL/6 mice given the CPZ-containing diet and compared them with those of controls. We assessed CPZ-induced demyelination in main white matter tracts of the forebrain, evaluated myelin break down in the neuropil of the main olfactory bulb (MOB), cerebral cortex (CTX), caudate putamen (CP), hippocampus (HP), thalamus (TH), and hypothalamus (HY), and counted the number of myelin sheath forming oligodendrocytes (OLs) in CTX, CP, TH, and HY. Obvious demyelination was observed in the corpus callosum, external capsule, CP, and dorsal hippocampal commissure whereas other tracts seemed to be unaffected. The neuropil of CTX, HP and MOB showed myelin break down, which was mild in TH and HY. The number of OLs was decreased in all the above regions of CPZ-treated mice although the degree of OL loss was not consistent across regions. The data provide further support for white matter abnormalities contributing to schizophrenia-like behaviors in mice.
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Affiliation(s)
- Hong-Ju Yang
- Department of Anatomy, School of Medicine, Southern Illinois University Carbondale, 1135 Lincoln Dr., Carbondale, IL 62901, USA
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Redrobe JP, Nielsen EØ, Christensen JK, Peters D, Timmermann DB, Olsen GM. α7 nicotinic acetylcholine receptor activation ameliorates scopolamine-induced behavioural changes in a modified continuous Y-maze task in mice. Eur J Pharmacol 2009; 602:58-65. [DOI: 10.1016/j.ejphar.2008.09.035] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2008] [Revised: 09/12/2008] [Accepted: 09/17/2008] [Indexed: 11/28/2022]
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