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Yao Y, Zhang S, Wang B, Lin X, Zhao G, Deng H, Chen Y. Neural dysfunction underlying working memory processing at different stages of the illness course in schizophrenia: a comparative meta-analysis. Cereb Cortex 2024; 34:bhae267. [PMID: 38960703 DOI: 10.1093/cercor/bhae267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Revised: 06/04/2024] [Accepted: 06/06/2024] [Indexed: 07/05/2024] Open
Abstract
Schizophrenia, as a chronic and persistent disorder, exhibits working memory deficits across various stages of the disorder, yet the neural mechanisms underlying these deficits remain elusive with inconsistent neuroimaging findings. We aimed to compare the brain functional changes of working memory in patients at different stages: clinical high risk, first-episode psychosis, and long-term schizophrenia, using meta-analyses of functional magnetic resonance imaging studies. Following a systematic literature search, 56 whole-brain task-based functional magnetic resonance imaging studies (15 for clinical high risk, 16 for first-episode psychosis, and 25 for long-term schizophrenia) were included. The separate and pooled neurofunctional mechanisms among clinical high risk, first-episode psychosis, and long-term schizophrenia were generated by Seed-based d Mapping toolbox. The clinical high risk and first-episode psychosis groups exhibited overlapping hypoactivation in the right inferior parietal lobule, right middle frontal gyrus, and left superior parietal lobule, indicating key lesion sites in the early phase of schizophrenia. Individuals with first-episode psychosis showed lower activation in left inferior parietal lobule than those with long-term schizophrenia, reflecting a possible recovery process or more neural inefficiency. We concluded that SCZ represent as a continuum in the early stage of illness progression, while the neural bases are inversely changed with the development of illness course to long-term course.
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Affiliation(s)
- Yuhao Yao
- Huaxi MR Research Center (HMRRC), Department of Radiology, West China Hospital of Sichuan University, Chengdu, China
- Research Unit of Psychoradiology, Chinese Academy of Medical Sciences, Chengdu, China
- Functional & Molecular Imaging Key Laboratory of Sichuan Province, West China Hospital of Sichuan University, Chengdu, China
| | - Shufang Zhang
- Department of Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, China
- West China School of Nursing, Sichuan University, Chengdu, China
| | - Boyao Wang
- Huaxi MR Research Center (HMRRC), Department of Radiology, West China Hospital of Sichuan University, Chengdu, China
- Research Unit of Psychoradiology, Chinese Academy of Medical Sciences, Chengdu, China
- Functional & Molecular Imaging Key Laboratory of Sichuan Province, West China Hospital of Sichuan University, Chengdu, China
| | - Xiaoyong Lin
- Huaxi MR Research Center (HMRRC), Department of Radiology, West China Hospital of Sichuan University, Chengdu, China
- Research Unit of Psychoradiology, Chinese Academy of Medical Sciences, Chengdu, China
- Functional & Molecular Imaging Key Laboratory of Sichuan Province, West China Hospital of Sichuan University, Chengdu, China
| | - Gaofeng Zhao
- Department of Psychiatry, Shandong Daizhuang Hospital, Jinning, China
| | - Hong Deng
- Mental Health Center, West China Hospital of Sichuan University, Chengdu, China
| | - Ying Chen
- Huaxi MR Research Center (HMRRC), Department of Radiology, West China Hospital of Sichuan University, Chengdu, China
- Research Unit of Psychoradiology, Chinese Academy of Medical Sciences, Chengdu, China
- Functional & Molecular Imaging Key Laboratory of Sichuan Province, West China Hospital of Sichuan University, Chengdu, China
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2
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Mayne P, Das J, Zou S, Sullivan RKP, Burne THJ. Perineuronal nets are associated with decision making under conditions of uncertainty in female but not male mice. Behav Brain Res 2024; 461:114845. [PMID: 38184206 DOI: 10.1016/j.bbr.2024.114845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 12/21/2023] [Accepted: 01/02/2024] [Indexed: 01/08/2024]
Abstract
Biological sex influences decision-making processes in significant ways, differentiating the responses animals choose when faced with a range of stimuli. The neurobiological underpinnings that dictate sex differences in decision-making tasks remains an important open question, yet single-sex studies of males form most studies in behavioural neuroscience. Here we used female and male BALB/c mice on two spatial learning and memory tasks and examined the expression of perineuronal nets (PNNs) and parvalbumin interneurons (PV) in regions correlated with spatial memory. Mice underwent the aversive active place avoidance (APA) task or the appetitive trial-unique nonmatching-to-location (TUNL) touchscreen task. Mice in the APA cohort learnt to avoid the foot-shock and no differences were observed on key measures of the task nor in the number and intensity of PNNs and PV. On the delay but not separation manipulation in the TUNL task, females received more incorrect trials and less correct trials compared to males. Furthermore, females in this cohort exhibited higher intensity PNNs and PV cells in the agranular and granular retrosplenial cortex, compared to males. These data show that female and male mice perform similarly on spatial learning tasks. However, sex differences in neural circuitry may underly differences in making decisions under conditions of uncertainty on an appetitive task. These data emphasise the importance of using mice of both sexes in studies of decision-making neuroscience.
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Affiliation(s)
- Phoebe Mayne
- Queensland Brain Institute, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Joyosmita Das
- Queensland Brain Institute, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Simin Zou
- Queensland Brain Institute, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Robert K P Sullivan
- Queensland Brain Institute, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Thomas H J Burne
- Queensland Brain Institute, The University of Queensland, St Lucia, QLD 4072, Australia; Queensland Centre for Mental Health Research, Wacol, QLD 4076, Australia.
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Bansal S, Bae GY, Robinson BM, Dutterer J, Hahn B, Luck SJ, Gold JM. Qualitatively Different Delay-Dependent Working Memory Distortions in People With Schizophrenia and Healthy Control Participants. BIOLOGICAL PSYCHIATRY. COGNITIVE NEUROSCIENCE AND NEUROIMAGING 2023; 8:1218-1227. [PMID: 37459911 PMCID: PMC10792108 DOI: 10.1016/j.bpsc.2023.07.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 06/30/2023] [Accepted: 07/08/2023] [Indexed: 07/28/2023]
Abstract
BACKGROUND Impairments in working memory (WM) have been well documented in people with schizophrenia (PSZ). However, these quantitative WM impairments can often be explained by nonspecific factors, such as impaired goal maintenance. Here, we used a spatial orientation delayed response task to explore a qualitative difference in WM dynamics between PSZ and healthy control participants (HCs). More specifically, we took advantage of the discovery that WM representations may drift either toward or away from previous trial targets (serial dependence). We tested the hypothesis that WM representations would drift toward the previous trial target in HCs but away from the previous trial target in PSZ. METHODS We assessed serial dependence in PSZ (n = 31) and HCs (n = 25) using orientation as the to-be-remembered feature and memory delays lasting from 0 to 8 seconds. Participants were asked to remember the orientation of a teardrop-shaped object and reproduce the orientation after a delay period of varying length. RESULTS Consistent with prior studies, we found that current trial memory representations were less precise in PSZ than in HCs. We also found that WM for the current trial orientation drifted toward the previous trial orientation in HCs (representational attraction) but drifted away from the previous trial orientation in PSZ (representational repulsion). CONCLUSIONS These results demonstrate a qualitative difference in WM dynamics between PSZ and HCs that cannot be easily explained by nuisance factors such as reduced effort. Most computational neuroscience models also fail to explain these results because they maintain information solely by means of sustained neural firing, which does not extend across trials. The results suggest a fundamental difference between PSZ and HCs in longer-term memory mechanisms that persist across trials, such as short-term potentiation and neuronal adaptation.
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Affiliation(s)
- Sonia Bansal
- Maryland Psychiatric Research Center, Department of Psychiatry, University of Maryland, School of Medicine, Baltimore, Maryland.
| | - Gi-Yeul Bae
- Department of Psychology, Arizona State University, Tempe, Arizona
| | - Benjamin M Robinson
- Maryland Psychiatric Research Center, Department of Psychiatry, University of Maryland, School of Medicine, Baltimore, Maryland
| | - Jenna Dutterer
- Maryland Psychiatric Research Center, Department of Psychiatry, University of Maryland, School of Medicine, Baltimore, Maryland
| | - Britta Hahn
- Maryland Psychiatric Research Center, Department of Psychiatry, University of Maryland, School of Medicine, Baltimore, Maryland
| | - Steven J Luck
- Center for Mind & Brain and Department of Psychology, University of California, Davis, Davis, California
| | - James M Gold
- Maryland Psychiatric Research Center, Department of Psychiatry, University of Maryland, School of Medicine, Baltimore, Maryland
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Barnard IL, Onofrychuk TJ, Toderash AD, Patel VN, Glass AE, Adrian JC, Laprairie RB, Howland JG. High-THC Cannabis Smoke Impairs Incidental Memory Capacity in Spontaneous Tests of Novelty Preference for Objects and Odors in Male Rats. eNeuro 2023; 10:ENEURO.0115-23.2023. [PMID: 37973381 PMCID: PMC10714893 DOI: 10.1523/eneuro.0115-23.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Revised: 09/19/2023] [Accepted: 10/16/2023] [Indexed: 11/19/2023] Open
Abstract
Working memory is an executive function that orchestrates the use of limited amounts of information, referred to as working memory capacity, in cognitive functions. Cannabis exposure impairs working memory in humans; however, it is unclear whether Cannabis facilitates or impairs rodent working memory and working memory capacity. The conflicting literature in rodent models may be at least partly because of the use of drug exposure paradigms that do not closely mirror patterns of human Cannabis use. Here, we used an incidental memory capacity paradigm where a novelty preference is assessed after a short delay in spontaneous recognition-based tests. Either object or odor-based stimuli were used in test variations with sets of identical [identical stimuli test (IST)] and different [different stimuli test (DST)] stimuli (three or six) for low-memory and high-memory loads, respectively. Additionally, we developed a human-machine hybrid behavioral quantification approach which supplements stopwatch-based scoring with supervised machine learning-based classification. After validating the spontaneous IST and DST in male rats, 6-item test versions with the hybrid quantification method were used to evaluate the impact of acute exposure to high-Δ9-tetrahydrocannabinol (THC) or high-CBD Cannabis smoke on novelty preference. Under control conditions, male rats showed novelty preference in all test variations. We found that high-THC, but not high-CBD, Cannabis smoke exposure impaired novelty preference for objects under a high-memory load. Odor-based recognition deficits were seen under both low-memory and high-memory loads only following high-THC smoke exposure. Ultimately, these data show that Cannabis smoke exposure impacts incidental memory capacity of male rats in a memory load-dependent, and stimuli-specific manner.
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Affiliation(s)
- Ilne L Barnard
- Department of Anatomy, Physiology, and Pharmacology, University of Saskatchewan, Saskatoon, Saskatchewan, S7N5E5, Canada
| | - Timothy J Onofrychuk
- Department of Anatomy, Physiology, and Pharmacology, University of Saskatchewan, Saskatoon, Saskatchewan, S7N5E5, Canada
| | - Aaron D Toderash
- Department of Computer Science, University of Saskatchewan, Saskatoon, Saskatchewan, S7N5C9, Canada
| | - Vyom N Patel
- Department of Computer Science, University of Saskatchewan, Saskatoon, Saskatchewan, S7N5C9, Canada
| | - Aiden E Glass
- Department of Anatomy, Physiology, and Pharmacology, University of Saskatchewan, Saskatoon, Saskatchewan, S7N5E5, Canada
| | - Jesse C Adrian
- Department of Anatomy, Physiology, and Pharmacology, University of Saskatchewan, Saskatoon, Saskatchewan, S7N5E5, Canada
| | - Robert B Laprairie
- College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, Saskatchewan, S7N5E5, Canada
- Department of Pharmacology, College of Medicine, Dalhousie University, Halifax, Nova Scotia, B3H 4R2, Canada
| | - John G Howland
- Department of Anatomy, Physiology, and Pharmacology, University of Saskatchewan, Saskatoon, Saskatchewan, S7N5E5, Canada
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Speers LJ, Sissons DJ, Cleland L, Bilkey DK. Hippocampal phase precession is preserved under ketamine, but the range of precession across a theta cycle is reduced. J Psychopharmacol 2023; 37:809-821. [PMID: 37515458 PMCID: PMC10399102 DOI: 10.1177/02698811231187339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 07/30/2023]
Abstract
BACKGROUND Hippocampal phase precession, which depends on the precise spike timing of place cells relative to local theta oscillations, has been proposed to underlie sequential memory. N-methyl-D-asparate (NMDA) receptor antagonists such as ketamine disrupt memory and also reproduce several schizophrenia-like symptoms, including spatial memory impairments and disorganized cognition. It is possible that these impairments result from disruptions to phase precession. AIMS/METHODS We used an ABA design to test whether an acute, subanesthetic dose (7.5 mg/kg) of ketamine disrupted phase precession in CA1 of male rats as they navigated around a rectangular track for a food reward. RESULTS/OUTCOMES Ketamine did not affect the ability of CA1 place cells to precess despite changes to place cell firing rates, local field potential properties and locomotor speed. However, ketamine reduced the range of phase precession that occurred across a theta cycle. CONCLUSION Phase precession is largely robust to acute NMDA receptor antagonism by ketamine, but the reduced range of precession could have important implications for learning and memory.
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Affiliation(s)
| | - Daena J Sissons
- Psychology Department, Otago University Dunedin, New Zealand
- Psychology Department, University of Canterbury, Christchurch, New Zealand
| | - Lana Cleland
- Psychology Department, Otago University Dunedin, New Zealand
- Department Psychological Medicine, Otago University, Christchurch, New Zealand
- Department Population Health, Otago University, Christchurch, New Zealand
| | - David K Bilkey
- Psychology Department, Otago University Dunedin, New Zealand
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Haigh SM, Berryhill ME, Kilgore-Gomez A, Dodd M. Working memory and sensory memory in subclinical high schizotypy: An avenue for understanding schizophrenia? Eur J Neurosci 2023; 57:1577-1596. [PMID: 36895099 PMCID: PMC10178355 DOI: 10.1111/ejn.15961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 03/07/2023] [Indexed: 03/11/2023]
Abstract
The search for robust, reliable biomarkers of schizophrenia remains a high priority in psychiatry. Biomarkers are valuable because they can reveal the underlying mechanisms of symptoms and monitor treatment progress and may predict future risk of developing schizophrenia. Despite the existence of various promising biomarkers that relate to symptoms across the schizophrenia spectrum, and despite published recommendations encouraging multivariate metrics, they are rarely investigated simultaneously within the same individuals. In those with schizophrenia, the magnitude of purported biomarkers is complicated by comorbid diagnoses, medications and other treatments. Here, we argue three points. First, we reiterate the importance of assessing multiple biomarkers simultaneously. Second, we argue that investigating biomarkers in those with schizophrenia-related traits (schizotypy) in the general population can accelerate progress in understanding the mechanisms of schizophrenia. We focus on biomarkers of sensory and working memory in schizophrenia and their smaller effects in individuals with nonclinical schizotypy. Third, we note irregularities across research domains leading to the current situation in which there is a preponderance of data on auditory sensory memory and visual working memory, but markedly less in visual (iconic) memory and auditory working memory, particularly when focusing on schizotypy where data are either scarce or inconsistent. Together, this review highlights opportunities for researchers without access to clinical populations to address gaps in knowledge. We conclude by highlighting the theory that early sensory memory deficits contribute negatively to working memory and vice versa. This presents a mechanistic perspective where biomarkers may interact with one another and impact schizophrenia-related symptoms.
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Affiliation(s)
- Sarah M. Haigh
- Department of Psychology, Center for Integrative Neuroscience, Programs in Cognitive and Brain Sciences, and Neuroscience, University of Nevada, Reno, Nevada, USA
| | - Marian E. Berryhill
- Department of Psychology, Center for Integrative Neuroscience, Programs in Cognitive and Brain Sciences, and Neuroscience, University of Nevada, Reno, Nevada, USA
| | - Alexandrea Kilgore-Gomez
- Department of Psychology, Center for Integrative Neuroscience, Programs in Cognitive and Brain Sciences, and Neuroscience, University of Nevada, Reno, Nevada, USA
| | - Michael Dodd
- Department of Psychology, University of Nebraska, Lincoln, Nebraska, USA
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7
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Bansal S, Bae GY, Robinson BM, Dutterer J, Hahn B, Luck SJ, Gold JM. Qualitatively different delay-dependent working memory distortions in people with schizophrenia and healthy control subjects. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.04.04.535597. [PMID: 37066149 PMCID: PMC10104073 DOI: 10.1101/2023.04.04.535597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/18/2023]
Abstract
Background Impairments in working memory(WM) have been well-documented in people with schizophrenia(PSZ). However, these quantitative WM impairments can often be explained by nonspecific factors, such as impaired goal maintenance. Here, we used a spatial orientation delayed-response task to explore a qualitative difference in WM dynamics between PSZ and healthy control subjects(HCS). Specifically, we took advantage of the discovery that WM representations may drift either toward or away from previous-trial targets(serial dependence). We tested the hypothesis that WM representations drift toward the previous-trial target in HCS but away from the previous-trial target in PSZ. Methods We assessed serial dependence in PSZ(N=31) and HCS(N=25), using orientation as the to-be-remembered feature and memory delays from 0 to 8s. Participants were asked to remember the orientation of a teardrop-shaped object and reproduce the orientation after a varying delay period. Results Consistent with prior studies, we found that current-trial memory representations were less precise in PSZ than in HCS. We also found that WM for the current-trial orientation drifted toward the previous-trial orientation in HCS(representational attraction) but drifted away from the previous-trial orientation in PSZ(representational repulsion). Conclusions These results demonstrate a qualitative difference in WM dynamics between PSZ and HCS that cannot easily be explained by nuisance factors such as reduced effort. Most computational neuroscience models also fail to explain these results, because they maintain information solely by means of sustained neural firing, which does not extend across trials. The results suggest a fundamental difference between PSZ and HCS in longer-term memory mechanisms that persist across trials, such as short-term potentiation and neuronal adaptation.
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Affiliation(s)
- Sonia Bansal
- Maryland Psychiatric Research Center, Department of Psychiatry, University of Maryland School of Medicine, Baltimore, Maryland
| | - Gi-Yeul Bae
- Department of Psychology, Arizona State University, Tempe, Arizona
| | - Benjamin M Robinson
- Maryland Psychiatric Research Center, Department of Psychiatry, University of Maryland School of Medicine, Baltimore, Maryland
| | - Jenna Dutterer
- Maryland Psychiatric Research Center, Department of Psychiatry, University of Maryland School of Medicine, Baltimore, Maryland
| | - Britta Hahn
- Maryland Psychiatric Research Center, Department of Psychiatry, University of Maryland School of Medicine, Baltimore, Maryland
| | - Steven J Luck
- Center for Mind & Brain and Department of Psychology, University of California, Davis, Davis, California
| | - James M Gold
- Maryland Psychiatric Research Center, Department of Psychiatry, University of Maryland School of Medicine, Baltimore, Maryland
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Hui CLM, See SHW, Chiu TC, Pintos AS, Kroyer JM, Suen YN, Lee EHM, Chan SKW, Chang WC, Elvevåg B, Chen EYH. What Drives Animal Fluency Performance in Cantonese-Speaking Chinese Patients with Adult-Onset Psychosis? Brain Sci 2023; 13:brainsci13030372. [PMID: 36979182 PMCID: PMC10046392 DOI: 10.3390/brainsci13030372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 02/16/2023] [Accepted: 02/17/2023] [Indexed: 02/24/2023] Open
Abstract
Among the numerous studies investigating semantic factors associated with functioning in psychotic patients, most have been conducted on western populations. By contrast, the current cross-sectional study involved native Cantonese-speaking Chinese participants. Using the category fluency task, we compared performance between patients and healthy participants and examined clinical and sociodemographic correlates. First-episode psychosis patients (n = 356) and gender- and age-matched healthy participants (n = 35) were asked to generate as many ‘animals’ as they could in a minute. As expected, patients generated fewer correct responses (an average of 15.5 vs. 22.9 words), generated fewer clusters (an average of 3.7 vs. 5.4 thematically grouped nouns), switched less between clusters (on average 8.0 vs. 11.9 switches) and, interestingly, produced a larger percentage of Chinese zodiac animals than healthy participants (an average of 37.7 vs. 24.2). However, these significant group differences in the clusters and switches disappeared when the overall word production was controlled for. Within patients, education was the strongest predictor of category fluency performance (namely the number of correct responses, clusters, and switches). The findings suggest that an overall slowness in patients may account for the group differences in category fluency performance rather than any specific abnormality per se.
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Affiliation(s)
- Christy Lai-Ming Hui
- Department of Psychiatry, School of Clinical Medicine, University of Hong Kong, Hong Kong, China
- Correspondence: ; Tel.: +852-2255-3064; Fax: +852-2855-1345
| | - Sally Hiu-Wah See
- Department of Psychiatry, School of Clinical Medicine, University of Hong Kong, Hong Kong, China
| | - Tsz-Ching Chiu
- Department of Psychiatry, School of Clinical Medicine, University of Hong Kong, Hong Kong, China
| | - Andrea Stephanie Pintos
- Department of Psychiatry, School of Clinical Medicine, University of Hong Kong, Hong Kong, China
| | - Johanna M. Kroyer
- Department of Psychiatry, School of Clinical Medicine, University of Hong Kong, Hong Kong, China
| | - Yi-Nam Suen
- Department of Psychiatry, School of Clinical Medicine, University of Hong Kong, Hong Kong, China
| | - Edwin Ho-Ming Lee
- Department of Psychiatry, School of Clinical Medicine, University of Hong Kong, Hong Kong, China
| | - Sherry Kit-Wa Chan
- Department of Psychiatry, School of Clinical Medicine, University of Hong Kong, Hong Kong, China
- State Key Laboratory of Brain and Cognitive Sciences, University of Hong Kong, Hong Kong, China
| | - Wing-Chung Chang
- Department of Psychiatry, School of Clinical Medicine, University of Hong Kong, Hong Kong, China
- State Key Laboratory of Brain and Cognitive Sciences, University of Hong Kong, Hong Kong, China
| | - Brita Elvevåg
- Department of Clinical Medicine, University of Tromsø—The Arctic University of Norway, 9037 Tromsø, Norway
| | - Eric Yu-Hai Chen
- Department of Psychiatry, School of Clinical Medicine, University of Hong Kong, Hong Kong, China
- State Key Laboratory of Brain and Cognitive Sciences, University of Hong Kong, Hong Kong, China
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de Arce KP, Ribic A, Chowdhury D, Watters K, Thompson GJ, Sanganahalli BG, Lippard ETC, Rohlmann A, Strittmatter SM, Missler M, Hyder F, Biederer T. Concerted roles of LRRTM1 and SynCAM 1 in organizing prefrontal cortex synapses and cognitive functions. Nat Commun 2023; 14:459. [PMID: 36709330 PMCID: PMC9884278 DOI: 10.1038/s41467-023-36042-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 01/13/2023] [Indexed: 01/29/2023] Open
Abstract
Multiple trans-synaptic complexes organize synapse development, yet their roles in the mature brain and cooperation remain unclear. We analyzed the postsynaptic adhesion protein LRRTM1 in the prefrontal cortex (PFC), a region relevant to cognition and disorders. LRRTM1 knockout (KO) mice had fewer synapses, and we asked whether other synapse organizers counteract further loss. This determined that the immunoglobulin family member SynCAM 1 controls synapse number in PFC and was upregulated upon LRRTM1 loss. Combined LRRTM1 and SynCAM 1 deletion substantially lowered dendritic spine number in PFC, but not hippocampus, more than the sum of single KO impairments. Their cooperation extended presynaptically, and puncta of Neurexins, LRRTM1 partners, were less abundant in double KO (DKO) PFC. Electrophysiology and fMRI demonstrated aberrant neuronal activity in DKO mice. Further, DKO mice were impaired in social interactions and cognitive tasks. Our results reveal concerted roles of LRRTM1 and SynCAM 1 across synaptic, network, and behavioral domains.
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Affiliation(s)
- Karen Perez de Arce
- Department of Neuroscience, Tufts University School of Medicine, Boston, MA, USA
- Neuroscience Department, Novartis Institutes for Biomedical Research, Cambridge, MA, USA
| | - Adema Ribic
- Department of Neuroscience, Tufts University School of Medicine, Boston, MA, USA
- Department of Psychology, University of Virginia, Charlottesville, VA, USA
| | | | - Katherine Watters
- Department of Neuroscience, Tufts University School of Medicine, Boston, MA, USA
- Department of Neurology, Yale School of Medicine, New Haven, CT, USA
| | - Garth J Thompson
- Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT, USA
- iHuman Institute, ShanghaiTech University, Shanghai, China
| | | | - Elizabeth T C Lippard
- Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT, USA
- Department of Psychiatry, University of Texas, Austin, TX, USA
| | - Astrid Rohlmann
- Institute of Anatomy and Molecular Neurobiology, Westfälische Wilhelms-University, Münster, Germany
| | - Stephen M Strittmatter
- Department of Neurology, Yale School of Medicine, New Haven, CT, USA
- Department of Neuroscience, Yale School of Medicine, New Haven, CT, USA
| | - Markus Missler
- Institute of Anatomy and Molecular Neurobiology, Westfälische Wilhelms-University, Münster, Germany
| | - Fahmeed Hyder
- Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT, USA
| | - Thomas Biederer
- Department of Neuroscience, Tufts University School of Medicine, Boston, MA, USA.
- Department of Neurology, Yale School of Medicine, New Haven, CT, USA.
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Gebreegziabhere Y, Habatmu K, Mihretu A, Cella M, Alem A. Cognitive impairment in people with schizophrenia: an umbrella review. Eur Arch Psychiatry Clin Neurosci 2022; 272:1139-1155. [PMID: 35633394 PMCID: PMC9508017 DOI: 10.1007/s00406-022-01416-6] [Citation(s) in RCA: 61] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 04/11/2022] [Indexed: 01/08/2023]
Abstract
Cognitive impairment is one of the core symptoms of schizophrenia. Quite a number of systematic reviews were published related to cognitive impairment in people with schizophrenia (PWS). This umbrella review, therefore, aimed at reviewing and synthesizing the findings of systematic reviews related to domains of cognition impaired and associated factors in PWS. We searched four electronic databases. Data related to domains, occurrence, and associated factors of cognitive impairment in PWS were extracted. The quality of all eligible systematic reviews was assessed using A MeaSurement Tool to Assess methodological quality of systematic Review (AMSTAR) tool. Results are summarized and presented in a narrative form. We identified 63 systematic reviews fulfilling the eligibility criteria. The included reviews showed that PWS had lower cognitive functioning compared to both healthy controls and people with affective disorders. Similar findings were reported among psychotropic free cases and people with first episode psychosis. Greater impairment of cognition was reported in processing speed, verbal memory, and working memory domains. Greater cognitive impairment was reported to be associated with worse functionality and poor insight. Cognitive impairment was also reported to be associated with childhood trauma and aggressive behaviour. According to our quality assessment, the majority of the reviews had moderate quality. We were able to find a good number of systematic reviews on cognitive impairment in PWS. The reviews showed that PWS had higher impairment in different cognitive domains compared to healthy controls and people with affective disorders. Impairment in domains of memory and processing speed were reported frequently.
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Affiliation(s)
- Yohannes Gebreegziabhere
- Department of Nursing, College of Health Sciences, Debre Berhan University, Debre Berhan, Ethiopia.
- Department of Psychiatry, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia.
| | - Kassahun Habatmu
- School of Psychology, College of Education and Behavioral Studies, Addis Ababa University, Addis Ababa, Ethiopia
| | - Awoke Mihretu
- Department of Psychiatry, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Matteo Cella
- Department of Psychology, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, England, UK
| | - Atalay Alem
- Department of Psychiatry, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
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11
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Mitchell BL, Hansell NK, McAloney K, Martin NG, Wright MJ, Renteria ME, Grasby KL. Polygenic influences associated with adolescent cognitive skills. INTELLIGENCE 2022. [DOI: 10.1016/j.intell.2022.101680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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12
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Abstract
Working memory (WM) refers to the ability to maintain a small number of representations in an activated, easily accessible state for a short period of time in the service of ongoing cognitive processing and behavior. Because WM is a resource critical for multiple forms of complex cognition and executive control of behavior, it is of central interest in the study of disorders such as schizophrenia that involve a broad compromise of cognitive function and in the regulation of goal-directed behavior. There is now robust evidence that WM impairment is characteristic of people with schizophrenia. The impairment includes both elementary storage capacity as well as more complex forms of WM that involve the manipulation and updating of WM representations. These impairments appear to underlie a substantial portion of the generalized cognitive deficit in schizophrenia. Neuroimaging studies have implicated widespread abnormalities in the broad neural system that subserves WM performance, consistent with the evidence of broad cognitive impairment seen in PSZ.
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Affiliation(s)
- James M Gold
- Maryland Psychiatric Research Center, Department of Psychiatry, University of Maryland School of Medicine, Baltimore, MD, USA.
| | - Steven J Luck
- Center for Mind & Brain and Department of Psychology, University of California, Davis, CA, USA
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13
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Browne CA, Conant K, Lasek AW, Nacher J. Editorial: Perineuronal Nets as Therapeutic Targets for the Treatment of Neuropsychiatric Disorders. Front Synaptic Neurosci 2022; 14:889800. [PMID: 35782789 PMCID: PMC9240763 DOI: 10.3389/fnsyn.2022.889800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 05/25/2022] [Indexed: 11/13/2022] Open
Affiliation(s)
- Caroline A. Browne
- Department of Pharmacology & Molecular Therapeutics, Uniformed Services University, Bethesda, MD, United States
- *Correspondence: Caroline A. Browne
| | - Katherine Conant
- Department of Neuroscience, Georgetown University Medical Center, Washington, DC, United States
| | - Amy W. Lasek
- Center for Alcohol Research in Epigenetics, Department of Psychiatry, University of Illinois at Chicago, Chicago, IL, United States
| | - Juan Nacher
- Neurobiology Unit, Program in Neurosciences and Institute of Biotechnology and Biomedicine (BIOTECMED), Universitat de València, Burjassot, Spain
- Spanish National Network for Research in Mental Health, Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Madrid, Spain
- Fundación Investigación Hospital Clínico de Valencia, INCLIVA, Valencia, Spain
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14
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Bâ MB, Curtis L, Pellizzer G. Viewer and object mental rotation in young adults with psychotic disorders. Schizophr Res 2022; 240:92-102. [PMID: 34991043 PMCID: PMC9271235 DOI: 10.1016/j.schres.2021.12.040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 10/11/2021] [Accepted: 12/24/2021] [Indexed: 11/19/2022]
Abstract
Schizophrenia patients have difficulty with processing visuo-spatial information, which may explain their deficits with considering other people's point-of-view. Processing visuo-spatial information operates on egocentric and allocentric frames of reference. Here, we tested the ability of individuals at different stages of psychotic disorders, specifically ultra-high-risk for psychosis individuals, as well as first-episode psychosis, and chronic schizophrenia patients, to perform a viewer mental rotation task and an object mental rotation task. The two tasks were differentiated only by the instruction given. Healthy individuals and patients with a diagnosis of anxiety/depressive mood disorder served as non-patient and patient controls, respectively. The results show that first-episode psychosis and chronic schizophrenia patients, but not ultra-high-risk individuals, had more errors and longer response times with both mental rotation tasks than the two control groups. In addition, chronic schizophrenia patients had additional difficulty with the object rotation task. The difference in performance between groups and tasks remained significant even after controlling for age, IQ, and antipsychotic medication dose. The results indicate that patients with psychotic disorders have a deficit of mental spatial imagery that include both egocentric and allocentric representations. This deficit may explain the difficulty of these patients with perspective-taking, and inferring other people's point of view, thoughts or intentions which is at the core of the pathogenesis of schizophrenia.
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Affiliation(s)
- Maryse Badan Bâ
- Department of Psychiatry, Geneva University Hospitals, Geneva, Switzerland
| | - Logos Curtis
- Department of Psychiatry, Geneva University Hospitals, Geneva, Switzerland
| | - Giuseppe Pellizzer
- Research Service, Veterans Affairs Health Care System, Minneapolis, MN, USA; Department of Neuroscience, University of Minnesota, Minneapolis, MN, USA; Department of Neurology, University of Minnesota, Minneapolis, MN, USA.
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15
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Zhou J, Li J, Zhao Q, Ou P, Zhao W. Working memory deficits in children with schizophrenia and its mechanism, susceptibility genes, and improvement: A literature review. Front Psychiatry 2022; 13:899344. [PMID: 35990059 PMCID: PMC9389215 DOI: 10.3389/fpsyt.2022.899344] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 07/20/2022] [Indexed: 11/13/2022] Open
Abstract
The negative influence on the cognitive ability of schizophrenia is one of the issues widely discussed in recent years. Working memory deficits are thought to be a core cognitive symptom of schizophrenia and lead to poorer social functions and worse academic performance. Previous studies have confirmed that working memory deficits tend to appear in the prodromal phase of schizophrenia. Therefore, considering that children with schizophrenia have better brain plasticity, it is critical to explore the development of their working memory. Although the research in this field developed gradually in recent years, few researchers have summarized these findings. The current study aims to review the recent studies from both behavior and neuroimaging aspects to summarize the working memory deficits of children with schizophrenia and to discuss the pathogenic factors such as genetic susceptibility. In addition, this study put forward some practicable interventions to improve cognitive symptoms of schizophrenia from psychological and neural perspectives.
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Affiliation(s)
- Jintao Zhou
- School of Psychology, Nanjing Normal University, Nanjing, China.,Department of Psychology, Fudan University, Shanghai, China
| | - Jingfangzhou Li
- School of Psychology, Nanjing Normal University, Nanjing, China
| | - Qi Zhao
- Department of Psychology, Faculty of Social Sciences, University of Macau, Macao, Macao SAR, China
| | - Peixin Ou
- Department of Psychology, Faculty of Social Sciences, University of Macau, Macao, Macao SAR, China
| | - Wan Zhao
- School of Psychology, Nanjing Normal University, Nanjing, China
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16
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Gotra MY, Keedy SK, Hill SK. Interactive effects of maintenance decay and interference on working memory updating in schizophrenia. Schizophr Res 2022; 239:103-110. [PMID: 34871994 DOI: 10.1016/j.schres.2021.11.028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 10/19/2021] [Accepted: 11/17/2021] [Indexed: 01/24/2023]
Abstract
BACKGROUND Deficits in working memory have been identified as a core cognitive impairment in schizophrenia. Prior work has identified a unique pattern of rapidly decreasing accuracy following intact encoding and updating of a single visuospatial target in patients with schizophrenia. Understanding whether these deficits are related to disruption of working memory stores following retrieval or part of a broader maintenance dysfunction may help elucidate the specific subprocesses underlying working memory deficits in schizophrenia. METHODS Participants were 71 patients with a schizophrenia spectrum disorder and 43 healthy controls who completed a working memory paradigm that parametrically varied maintenance demands from 1000 to 8000 ms. RESULTS Patients with a schizophrenia spectrum disorder were comparable to healthy controls at delays of 1000 ms. However, when delays were extended to 2000 and 4000 ms, the patient group showed significantly decreased accuracy. Additionally, the patient group showed a greater decline in accuracy following a second delay. CONCLUSIONS These findings suggest that early encoding of one item is intact in patients with a schizophrenia spectrum disorder, but information rapidly decays from working memory stores with extended delays. Accuracy further decreased when information was retrieved from working memory, suggesting that working memory stores may also be susceptible to disruption from internal stimuli. Thus, working memory stores in patients with a schizophrenia spectrum disorder may be vulnerable to both rapid decay and interference.
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Affiliation(s)
- Milena Y Gotra
- Department of Psychology, Rosalind Franklin University of Medicine and Science, North Chicago, IL, United States
| | - Sarah K Keedy
- Department of Psychiatry and Behavioral Neuroscience, University of Chicago, Chicago, IL, United States
| | - S Kristian Hill
- Department of Psychology, Rosalind Franklin University of Medicine and Science, North Chicago, IL, United States.
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17
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Wang X, Cheng B, Roberts N, Wang S, Luo Y, Tian F, Yue S. Shared and distinct brain fMRI response during performance of working memory tasks in adult patients with schizophrenia and major depressive disorder. Hum Brain Mapp 2021; 42:5458-5476. [PMID: 34431584 PMCID: PMC8519858 DOI: 10.1002/hbm.25618] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 07/02/2021] [Accepted: 07/13/2021] [Indexed: 02/05/2023] Open
Abstract
Working memory (WM) impairments are common features of psychiatric disorders. A systematic meta-analysis was performed to determine common and disorder-specific brain fMRI response during performance of WM tasks in patients with SZ and patients with MDD relative to healthy controls (HC). Thirty-four published fMRI studies of WM in patients with SZ and 18 published fMRI studies of WM in patients with MDD, including relevant HC, were included in the meta-analysis. In both SZ and MDD there was common stronger fMRI response in right medial prefrontal cortex (MPFC) and bilateral anterior cingulate cortex (ACC), which are part of the default mode network (DMN). The effects were of greater magnitude in SZ than MDD, especially in prefrontal-temporal-cingulate-striatal-cerebellar regions. In addition, a disorder-specific weaker fMRI response was observed in right middle frontal gyrus (MFG) in MDD, relative to HC. For both SZ and MDD a significant correlation was observed between the severity of clinical symptoms and lateralized fMRI response relative to HC. These findings indicate that there may be common and distinct anomalies in brain function underlying deficits in WM in SZ and MDD, which may serve as a potential functional neuroimaging-based diagnostic biomarker with value in supporting clinical diagnosis, measuring illness severity and assessing the efficacy of treatments for SZ and MDD at the brain level.
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Affiliation(s)
- Xiuli Wang
- Department of Psychiatry, the Fourth People's Hospital of Chengdu, Chengdu, China
| | - Bochao Cheng
- Department of Radiology, West China Second University Hospital of Sichuan University, Chengdu, China
| | - Neil Roberts
- Edinburgh Imaging Facility, Queens Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Song Wang
- Department of Radiology, Huaxi MR Research Center, West China Hospital of Sichuan University, Chengdu, China
| | - Ya Luo
- Mental Health Center, West China Hospital of Sichuan University, Chengdu, China
| | - Fangfang Tian
- Department of Nuclear Medicine, West China Hospital of Sichuan University, Chengdu, China
| | - Suping Yue
- Department of Psychiatry, the Fourth People's Hospital of Chengdu, Chengdu, China
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18
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Percelay S, Freret T, Turnbull N, Bouet V, Boulouard M. Combination of MAP6 deficit, maternal separation and MK801 in female mice: A 3-hit animal model of neurodevelopmental disorder with cognitive deficits. Behav Brain Res 2021; 413:113473. [PMID: 34280461 DOI: 10.1016/j.bbr.2021.113473] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 07/08/2021] [Accepted: 07/14/2021] [Indexed: 11/26/2022]
Abstract
Schizophrenia is a major psychiatric disease still lacking efficient treatment, particularly for cognitive deficits. To go further in research of new treatments that would encompass all the symptoms associated with this pathology, preclinical animal models need to be improved. To date, the aetiology of schizophrenia is unknown, but there is increasing evidence to highlight its multifactorial nature. We built a new neurodevelopmental mouse model gathering a triple factor combination (3-M): a genetic factor (partial deletion of MAP6 gene), an early stress (maternal separation) and a late pharmacological factor (MK801 administration, 0.05 mg/kg, i.p., daily for 5 days). The effects of each factor and of their combination were investigated on several behaviours including cognitive functions. While each individual factor induced slight deficits in one or another behavioural test, 3-M conditioning induces a wider phenotype with hyperlocomotion and cognitive deficits (working memory and social recognition). This study confirms the hypothesis that genetic, environmental and pharmacological factors, even if not deleterious by themselves, could act synergistically to induce a deleterious behavioural phenotype. It moreover encourages the use of such combined models to improve translational research on neurodevelopmental disorders.
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Affiliation(s)
- Solenn Percelay
- Normandie Université, UNICAEN, INSERM, COMETE, CYCERON, CHU Caen, 14000, Caen, France.
| | - Thomas Freret
- Normandie Université, UNICAEN, INSERM, COMETE, CYCERON, CHU Caen, 14000, Caen, France
| | - Nicole Turnbull
- Normandie Université, UNICAEN, INSERM, COMETE, CYCERON, CHU Caen, 14000, Caen, France
| | - Valentine Bouet
- Normandie Université, UNICAEN, INSERM, COMETE, CYCERON, CHU Caen, 14000, Caen, France
| | - Michel Boulouard
- Normandie Université, UNICAEN, INSERM, COMETE, CYCERON, CHU Caen, 14000, Caen, France
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19
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Brunette AM, Schacter DL. Cognitive mechanisms of episodic simulation in psychiatric populations. Behav Res Ther 2020; 136:103778. [PMID: 33338778 DOI: 10.1016/j.brat.2020.103778] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Revised: 11/01/2020] [Accepted: 11/17/2020] [Indexed: 01/30/2023]
Abstract
Episodic simulation is the construction of a mental representation of a specific autobiographical future event. Episodic simulation has increasingly been studied in psychiatric populations. Here we 1) review evidence indicating that episodic simulation is compromised in patients with depression, anxiety, schizophrenia, bipolar disorder, and PTSD; and 2) consider several potential cognitive mechanisms of episodic simulation in psychiatric populations: episodic retrieval, scene construction, mental imagery, components of the CaRFAX model (i.e., capture and rumination, functional avoidance, and executive functioning), and narrative style. We evaluate evidence regarding these mechanisms across psychiatric populations, and identify areas of future research. Understanding the factors that contribute to episodic simulation impairment in psychiatric populations may lead to targeted and effective treatment approaches.
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Affiliation(s)
- Amanda M Brunette
- VA Boston Healthcare System, Psychology Service, 150 South Huntington Avenue, Boston, MA, 02130, United States.
| | - Daniel L Schacter
- Harvard University, Department of Psychology, William James Hall, 33 Kirkland Street, Cambridge, MA, 02138, United States.
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20
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Gold JM, Bansal S, Anticevic A, Cho YT, Repovš G, Murray JD, Hahn B, Robinson BM, Luck SJ. Refining the Empirical Constraints on Computational Models of Spatial Working Memory in Schizophrenia. BIOLOGICAL PSYCHIATRY: COGNITIVE NEUROSCIENCE AND NEUROIMAGING 2020; 5:913-922. [PMID: 32741701 DOI: 10.1016/j.bpsc.2020.05.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 04/23/2020] [Accepted: 05/07/2020] [Indexed: 01/14/2023]
Abstract
BACKGROUND Impairments in spatial working memory (sWM) have been well documented in schizophrenia. Here we provide a comprehensive test of a microcircuit model of WM performance in schizophrenia that predicts enhanced effects of increasing delay duration and distractors based on a hypothesized imbalance of excitatory and inhibitory processes. METHODS Model predictions were tested in 41 people with schizophrenia (PSZ) and 32 healthy control subjects (HCS) performing an sWM task. In one condition, a single target location was followed by delays of 0, 2, 4, or 8 seconds. In a second condition, distractors were presented during the 4-second delay interval at 20°, 30°, 40°, 50°, or 90° from the original target location. RESULTS PSZ showed less precise sWM representations than HCS, and the rate of memory drift over time was greater in PSZ than in HCS. Relative to HCS, the spatial recall responses of PSZ were more repelled by distractors presented close to the target location and more attracted by distractors presented far from the target location. The degree of attraction to distant distractors was correlated with the rate of memory drift in the absence of distractors. CONCLUSIONS Consistent with the microcircuit model, PSZ exhibited both a greater rate of drift and greater attraction to distant distractors relative to HCS. These two effects were correlated, consistent with the proposal that they arise from a single underlying mechanism. However, the repulsion effects produced by nearby distractors were not predicted by the model and thus require an updated modeling framework.
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Affiliation(s)
- James M Gold
- Maryland Psychiatric Research Center, Department of Psychiatry, University of Maryland School of Medicine, Baltimore, Maryland.
| | - Sonia Bansal
- Maryland Psychiatric Research Center, Department of Psychiatry, University of Maryland School of Medicine, Baltimore, Maryland
| | - Alan Anticevic
- Department of Psychiatry, Yale University School of Medicine, New Haven, Connecticut
| | - Youngsun T Cho
- Department of Psychiatry, Yale University School of Medicine, New Haven, Connecticut; Child Study Center, Yale University School of Medicine, New Haven, Connecticut
| | - Grega Repovš
- Department of Psychology, University of Ljubljana, Ljubljana, Slovenia
| | - John D Murray
- Department of Psychiatry, Yale University School of Medicine, New Haven, Connecticut
| | - Britta Hahn
- Maryland Psychiatric Research Center, Department of Psychiatry, University of Maryland School of Medicine, Baltimore, Maryland
| | - Benjamin M Robinson
- Maryland Psychiatric Research Center, Department of Psychiatry, University of Maryland School of Medicine, Baltimore, Maryland
| | - Steven J Luck
- Center for Mind & Brain and Department of Psychology, University of California, Davis, Davis, California
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21
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Dysregulation of Epigenetic Control Contributes to Schizophrenia-Like Behavior in Ebp1 +/- Mice. Int J Mol Sci 2020; 21:ijms21072609. [PMID: 32283721 PMCID: PMC7178112 DOI: 10.3390/ijms21072609] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 04/07/2020] [Accepted: 04/07/2020] [Indexed: 11/17/2022] Open
Abstract
Dysregulation of epigenetic machinery can cause a variety of neurological disorders associated with cognitive abnormalities. In the hippocampus of postmortem Schizophrenia (SZ) patients, the most notable finding is the deregulation of GAD67 along with differential regulation of epigenetic factors associated with glutamate decarboxylase 67 (GAD67) expression. As we previously reported, ErbB3-binding protein 1 (EBP1) is a potent epigenetic regulator. EBP1 can induce repression of Dnmt1, a well-studied transcriptional repressor of GAD67. In this study, we investigated whether EBP1 contributes to the regulation of GAD67 expression in the hippocampus, controlling epigenetic machinery. In accordance with SZ-like behaviors in Ebp1(+/−) mice, heterozygous deletion of EBP1 led to a dramatic reduction of GAD67 expression, reflecting an abnormally high level of Dnmt1. Moreover, we found that EBP1 binds to the promoter region of HDAC1, which leads to histone deacetylation of GAD67, and suppresses histone deacetylase 1 (HDAC1) expression, inversely mirroring an unusually high level of HDAC1 in Ebp1(+/−) mice. However, EBP1 mutant (p.Glu 183 Ter) found in SZ patients did not elevate the expression of GAD67, failing to suppress Dnmt1 and/or HDAC1 expression. Therefore, this data supports the hypothesis that a reduced amount of EBP1 may contribute to an etiology of SZ due to a loss of transcriptional inhibition of epigenetic repressors, leading to a decreased expression of GAD67.
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22
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Dixit V, Kumar S, Chaudhury S. Neuropsychological dysfunctions among chronic schizophrenia patients, alcohol dependence cases, and normal subjects: A comparative study. Ind Psychiatry J 2020; 29:105-122. [PMID: 33776284 PMCID: PMC7989451 DOI: 10.4103/ipj.ipj_70_20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 05/27/2020] [Indexed: 11/04/2022] Open
Abstract
AIM The aim of this study is to assess the neuropsychological profiles of chronic schizophrenia and alcohol-dependent subjects. MATERIALS AND METHODS This hospital-based cross-sectional study included 30 chronic schizophrenia patients, 30 alcohol-dependent patients and 30-matched normal controls. Demographic and clinical data were collected on a self-designed pro forma. Positive and Negative Syndrome Scale (PANSS) and Severity of Alcohol Dependence Questionnaire (SADQ-C) were administered to chronic schizophrenia and alcohol-dependent patients, respectively. The AIIMS Comprehensive Neuropsychological Battery in Hindi (Adult Form) was used to assess neuropsychological dysfunctions. RESULTS Neuropsychological dysfunctions were found in 83.3% of chronic schizophrenia patients, 36.7% alcohol dependents and none of the normal subjects. In comparison to normal subjects, schizophrenia patients had significantly more dysfunctions in neuropsychological-domains such as motor, tactile, visual, receptive and expressive speech, reading, writing, arithmetic, memory, and intellectual processes. A significant positive correlation was found between the PANSS total score and T scores of most of the clinical scales except motor and visual scales; the PANSS general psychopathology score and T scores of most of the clinical scales except motor visual and pathognomonic scales; the PANSS negative score and T scores of most of the clinical scales except visual scale; and the PANSS positive score and T scores of receptive speech, arithmetic, and memory scales. In comparison to normal subjects, the alcohol dependents had significantly more dysfunctions in neuropsychological-domains such as motor, tactile, visual, receptive and expressive speech, reading, writing, arithmetic, and memory. A significant positive correlation was found between the SADQ total scale and T scores of clinical scales such as expressive speech, writing, arithmetic, intellectual processes, left hemisphere, and total battery scales. CONCLUSIONS Neuropsychological dysfunction was significantly more common and severe in chronic schizophrenia patients than in alcohol-dependent patients. In comparison to alcohol dependents, the chronic schizophrenia patients had more dysfunctions in neuropsychological-domains such as tactile, arithmetic, memory, and intellectual processes.
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Affiliation(s)
- Vidhata Dixit
- Department of Clinical Psychology, RINPAS, Ranchi, Jharkhand, India
| | - Santosh Kumar
- Department of Psychiatry, Indira Gandhi Institute of Medical Sciences, Patna, Bihar, India
| | - Suprakash Chaudhury
- Department of Psychiatry, Dr. D. Y. Patil Medical College, Dr. D. Y. Patil Vidyapeeth, Pune, Maharashtra, India
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23
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Pérez MÁ, Morales C, Santander O, García F, Gómez I, Peñaloza-Sancho V, Fuentealba P, Dagnino-Subiabre A, Moya PR, Fuenzalida M. Ketamine-Treatment During Late Adolescence Impairs Inhibitory Synaptic Transmission in the Prefrontal Cortex and Working Memory in Adult Rats. Front Cell Neurosci 2019; 13:372. [PMID: 31481877 PMCID: PMC6710447 DOI: 10.3389/fncel.2019.00372] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Accepted: 07/30/2019] [Indexed: 12/11/2022] Open
Abstract
Schizophrenia (SZ) is associated with changes in the structure and function of several brain areas. Several findings suggest that these impairments are related to a dysfunction in γ-aminobutyric acid (GABA) neurotransmission in brain areas such as the medial prefrontal cortex (mPFC), the hippocampus (HPC) and the primary auditory cortex (A1); however, it is still unclear how the GABAergic system is disrupted in these brain areas. Here, we examined the effect of ketamine (Ket) administration during late adolescence in rats on inhibition in the mPFC-, ventral HPC (vHPC), and A1. We observe that Ket treatment reduced the expression of the calcium-binding protein parvalbumin (PV) and the GABA-producing enzyme glutamic acid decarboxylase 67 (GAD67) as well as decreased inhibitory synaptic efficacy in the mPFC. In addition, Ket-treated rats performed worse in executive tasks that depend on the integrity and proper functioning of the mPFC. Conversely, we do not find such changes in vHPC or A1. Together, our results provide strong experimental support for the hypothesis that during adolescence, the function of the mPFC is more susceptible than that of HPC or A1 to NMDAR hypofunction, showing apparent structure specificity. Thus, the impairment of inhibitory circuitry in mPFC could be a convergent primary site of SZ-like behavior during the adulthood.
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Affiliation(s)
- Miguel Ángel Pérez
- Laboratorio de Plasticidad Neuronal, Universidad de Valparaíso, Valparaíso, Chile.,Facultad de Ciencias, Centro de Neurobiología y Fisiopatología Integrativa (CENFI), Instituto de Fisiología, Universidad de Valparaíso, Valparaíso, Chile.,Escuela de Ciencias de la Salud, Carrera de Kinesiología, Universidad Viña del Mar, Viña del Mar, Chile
| | - Camila Morales
- Centro Interdisciplinario de Neurociencia de Valparaíso, Universidad de Valparaíso, Valparaíso, Chile
| | - Odra Santander
- Laboratorio de Plasticidad Neuronal, Universidad de Valparaíso, Valparaíso, Chile.,Facultad de Ciencias, Centro de Neurobiología y Fisiopatología Integrativa (CENFI), Instituto de Fisiología, Universidad de Valparaíso, Valparaíso, Chile.,Programa de Doctorado en Ciencias, Mención Neurociencias, Universidad de Valparaíso, Chile
| | - Francisca García
- Laboratorio de Plasticidad Neuronal, Universidad de Valparaíso, Valparaíso, Chile.,Facultad de Ciencias, Centro de Neurobiología y Fisiopatología Integrativa (CENFI), Instituto de Fisiología, Universidad de Valparaíso, Valparaíso, Chile.,Programa de Doctorado en Ciencias, Mención Neurociencias, Universidad de Valparaíso, Chile
| | - Isabel Gómez
- Laboratorio de Neurogenética, Universidad de Valparaíso, Valparaíso, Chile
| | - Valentín Peñaloza-Sancho
- Facultad de Ciencias, Centro de Neurobiología y Fisiopatología Integrativa (CENFI), Instituto de Fisiología, Universidad de Valparaíso, Valparaíso, Chile.,Laboratorio de Neurobiología del Estrés, Universidad de Valparaíso, Valparaíso, Chile
| | - Pablo Fuentealba
- Laboratory of Neural Circuits, Centro de Neurociencia Universidad Católica, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Alexies Dagnino-Subiabre
- Facultad de Ciencias, Centro de Neurobiología y Fisiopatología Integrativa (CENFI), Instituto de Fisiología, Universidad de Valparaíso, Valparaíso, Chile.,Laboratorio de Neurobiología del Estrés, Universidad de Valparaíso, Valparaíso, Chile
| | - Pablo R Moya
- Centro Interdisciplinario de Neurociencia de Valparaíso, Universidad de Valparaíso, Valparaíso, Chile.,Laboratorio de Neurogenética, Universidad de Valparaíso, Valparaíso, Chile
| | - Marco Fuenzalida
- Laboratorio de Plasticidad Neuronal, Universidad de Valparaíso, Valparaíso, Chile.,Facultad de Ciencias, Centro de Neurobiología y Fisiopatología Integrativa (CENFI), Instituto de Fisiología, Universidad de Valparaíso, Valparaíso, Chile
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24
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Hiroi N, Yamauchi T. Modeling and Predicting Developmental Trajectories of Neuropsychiatric Dimensions Associated With Copy Number Variations. Int J Neuropsychopharmacol 2019; 22:488-500. [PMID: 31135887 PMCID: PMC6672556 DOI: 10.1093/ijnp/pyz026] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 05/20/2019] [Accepted: 05/24/2019] [Indexed: 01/23/2023] Open
Abstract
Copy number variants, such as duplications and hemizygous deletions at chromosomal loci of up to a few million base pairs, are highly associated with psychiatric disorders. Hemizygous deletions at human chromosome 22q11.2 were found to be associated with elevated instances of schizophrenia and autism spectrum disorder in 1992 and 2002, respectively. Following these discoveries, many mouse models have been developed and tested to analyze the effects of gene dose alterations in small chromosomal segments and single genes of 22q11.2. Despite several limitations to modeling mental illness in mice, mouse models have identified several genes on 22q11.2-Tbx1, Dgcr8, Comt, Sept5, and Prodh-that contribute to dimensions of autism spectrum disorder and schizophrenia, including working memory, social communication and interaction, and sensorimotor gating. Mouse studies have identified that heterozygous deletion of Tbx1 results in defective social communication during the neonatal period and social interaction deficits during adolescence/adulthood. Overexpression of Tbx1 or Comt in adult neural progenitor cells in the hippocampus delays the developmental maturation of working memory capacity. Collectively, mouse models of variants of these 4 genes have revealed several potential neuronal mechanisms underlying various aspects of psychiatric disorders, including adult neurogenesis, microRNA processing, catecholamine metabolism, and synaptic transmission. The validity of the mouse data would be ultimately tested when therapies or drugs based on such potential mechanisms are applied to humans.
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Affiliation(s)
- Noboru Hiroi
- Department of Psychiatry and Behavioral Sciences, Albert Einstein College of Medicine, Bronx, New York
- Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, New York
- Department of Genetics, Albert Einstein College of Medicine, Bronx, New York
| | - Takahira Yamauchi
- Department of Psychiatry and Behavioral Sciences, Albert Einstein College of Medicine, Bronx, New York
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Li X, Yi ZH, Lv QY, Chu MY, Hu HX, Wang JH, Zhang JY, Cheung EEF, Chan RCK. Clinical utility of the dual n-back task in schizophrenia: A functional imaging approach. Psychiatry Res Neuroimaging 2019; 284:37-44. [PMID: 30658243 DOI: 10.1016/j.pscychresns.2019.01.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 01/08/2019] [Accepted: 01/10/2019] [Indexed: 12/27/2022]
Abstract
The neural correlate of working memory (WM) impairment in schizophrenia is key to the understanding of the cognitive deficits observed in this disorder. We sought to determine the clinical validity of the dual version n-back paradigm in patients with schizophrenia, and whether schizophrenia patients exhibit altered brain activation patterns compared with healthy controls in this dual version WM measure using functional magnetic resonance imaging. Patients with schizophrenia (n = 20) and healthy controls (n = 24) performed the dual n-back task that consists of both visuospatial and auditory-verbal n-back streams, in which participants were required to monitor and update the contents from these two different inputs simultaneously. Significant positive correlations were found between performance in the dual 2-back condition and another measure of WM capacity and IQ estimates. Moreover, hypoactivation was observed at the right middle frontal gyrus and the posterior parietal regions in schizophrenia participants compared with healthy controls. The right hippocampus was less deactivated in schizophrenia patients compared with healthy controls. Our results support the clinical utility of the dual n-back task in schizophrenia and may have implications for the development of specific cognitive training targeting these impaired neural substrates in relation to WM in patients with schizophrenia.
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Affiliation(s)
- Xu Li
- Key Laboratory of Adolescent Cyberpsychology and Behavior(CCNU), Ministry of Education, School of Psychology, Central China Normal University, Wuhan, China; Neuropsychology and Applied Cognitive Neuroscience Laboratory, CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, China; Department of Psychology, University of Chinese Academy of Sciences, Beijing, China
| | - Zheng-Hui Yi
- Shanghai Mental Health Centre, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Qin-Yu Lv
- Shanghai Mental Health Centre, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Min-Yi Chu
- Translational Neuropsychology and Applied Cognitive Neuroscience Laboratory, Shanghai Mental Health Centre, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hui-Xin Hu
- Translational Neuropsychology and Applied Cognitive Neuroscience Laboratory, Shanghai Mental Health Centre, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jin-Hong Wang
- MRI center, Shanghai Mental Health Centre, Shanghai, China
| | - Jian-Ye Zhang
- MRI center, Shanghai Mental Health Centre, Shanghai, China
| | - Eric E F Cheung
- Castle Peak Hospital, Hong Kong Special Administrative Region, China
| | - Raymond C K Chan
- Neuropsychology and Applied Cognitive Neuroscience Laboratory, CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, China; Department of Psychology, University of Chinese Academy of Sciences, Beijing, China; Translational Neuropsychology and Applied Cognitive Neuroscience Laboratory, Shanghai Mental Health Centre, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Menzies Health Institute Queensland and School of Applied Psychology, Griffith University, Gold Coast, Australia.
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26
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Gilmour G, Porcelli S, Bertaina-Anglade V, Arce E, Dukart J, Hayen A, Lobo A, Lopez-Anton R, Merlo Pich E, Pemberton DJ, Havenith MN, Glennon JC, Harel BT, Dawson G, Marston H, Kozak R, Serretti A. Relating constructs of attention and working memory to social withdrawal in Alzheimer’s disease and schizophrenia: issues regarding paradigm selection. Neurosci Biobehav Rev 2019; 97:47-69. [DOI: 10.1016/j.neubiorev.2018.09.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 08/29/2018] [Accepted: 09/27/2018] [Indexed: 12/12/2022]
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27
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Zhang L, Ran X, Li T, Ku Y, Liu L, Huang T, Yan W. Analysis of influencing factors of visual working memory in young adult patients with schizophrenia. Gen Psychiatr 2018; 31:e100036. [PMID: 30815633 PMCID: PMC6371659 DOI: 10.1136/gpsych-2018-100036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Accepted: 11/20/2018] [Indexed: 01/26/2023] Open
Abstract
BACKGROUND Patients with schizophrenia have general cognitive impairments, and the impairment of working memory is considered to be the basis of cognitive impairments. The research on visual working memory, one of the subcomponents, is getting more and more attention. However, the influencing factors which cause the deficits of visual working memory in patients with schizophrenia have not been clearly explained. To provide evidence for cognitive impairment interventions, the present study explored the factors influencing the deficits of patients' visual working memory. AIM The present study discussed the relevant factors influencing the visual working memory of patients with schizophrenia by measuring the accuracy of the visual working memory of patients with schizophrenia and healthy controls. METHODS Colour-recall paradigm was employed to measure the accuracy of the visual working memory of 61 healthy controls and 61 patients who met the International Classification of Diseases, Tenth Revision diagnostic criteria for schizophrenia. The age range of subjects was 18-50. Scale for the Assessment of Positive Symptoms (SAPS) and Scale for the Assessment of Negative Symptoms (SANS) were used to evaluate the patients' clinical symptoms. RESULTS Compared with the healthy control group, the accuracy of visual working memory of patients with schizophrenia was significantly impaired (t=3.062, p=0.003). The accuracy of visual working memory of patients with schizophrenia was not related to age (r=0.023, p=0.860), the age of onset (r=-0.003, p=0.979), the duration of illness (r=-0.038, p=0.769), education level (r=-0.181, p=0.162), continuous working time before illness (r=-0.107, p=0.413) or the daily dose of antipsychotic drugs (r=0.062, p=0.635); however, it was positively related to the number of hospitalisations (r=0.471, p<0.001). The total score of Scale for the Assessment of Positive Symptoms (SAPS) was negatively related to the accuracy of visual working memory (r=-0.388, p=0.005), while the total score of Scale for the Assessment of Negative Symptoms (SANS) (r=0.416, p=0.001), the total score of diminished emotional expressiveness (r=0.352, p=0.005) and the total score of attention disorder (r=0.310, p=0.015) were positively related to the accuracy of visual working memory. Patients using a single drug and those using multiple drugs were compared with each other. They were not significantly different in age (t=0.010, p=0.992), the number of hospitalisations (t=0.656, p=0.514), the duration of illness (t=0.701, p=0.486), the total score of SANS (t=0.078, p=0.938), the total score of SAPS (t=1.815, p=0.079) and the daily dose of antipsychotic drugs (t=1.794, p=0.078). However, in order to explore whether single or combined drug use would affect the accuracy of visual working memory of patients with schizophrenia, the present study also compared these two groups' different S0 values of the accuracy of visual working memory. The results showed that the accuracy of visual working memory of patients with schizophrenia with combined drug use was significantly better than that of patients with single drug use (t=2.515, p=0.015, independent sample t-test). CONCLUSION The present study indicates that the visual working memory of young adult patients with schizophrenia is impaired compared with the healthy people within the same age range. The impairment is more obvious in patients who have multiple hospitalisations and suffer from severe negative symptoms. The impairment in patients with more severe positive symptoms is not very obvious. Combined drug use is likely to alleviate the impairment.
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Affiliation(s)
- Li Zhang
- Outpatient, Shanghai Changning District Mental Health Center, Shanghai, China
| | - Xuemei Ran
- Institute of Cognitive Neuroscience, East China Normal University, Shanghai, China
| | - Ting Li
- Outpatient, Shanghai Changning District Mental Health Center, Shanghai, China
| | - Yixuan Ku
- Institute of Cognitive Neuroscience, East China Normal University, Shanghai, China
| | - Li Liu
- Outpatient, Shanghai Changning District Mental Health Center, Shanghai, China
| | - Tingming Huang
- Outpatient, Shanghai Changning District Mental Health Center, Shanghai, China
| | - Wenjia Yan
- Outpatient, Shanghai Changning District Mental Health Center, Shanghai, China
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Dubovyk V, Manahan-Vaughan D. Time-Dependent Alterations in the Expression of NMDA Receptor Subunits along the Dorsoventral Hippocampal Axis in an Animal Model of Nascent Psychosis. ACS Chem Neurosci 2018; 9:2241-2251. [PMID: 29634239 DOI: 10.1021/acschemneuro.8b00017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Psychosis is a mental condition that is characterized by hallucinations, delusions, disordered thought, as well as socio-emotional and cognitive impairments. Once developed, it tends to progress into a chronic psychotic illness. Here, the duration of untreated psychosis plays a crucial role: the earlier the treatment begins, relative to the first episode of the disease, the better the patient's functional prognosis. To what extent the success of early interventions relate to progressive changes at the neurotransmitter receptor level is as yet unclear. In fact, very little is known as to how molecular changes develop, transform, and become established following the first psychotic event. One neurotransmitter receptor for which a specific role in psychosis has been discussed is the N-methyl-d-aspartate receptor (NMDAR). This receptor is especially important for information encoding in the hippocampus. The hippocampus is one of the loci of functional change in psychosis, to which a role in the pathophysiology of psychosis has been ascribed. Here, we examined whether changes in NMDAR subunit expression occur along the dorsoventral axis of the hippocampus 1 week and 3 months after systemic treatment with an NMDAR antagonist (MK801) that initiates a psychosis-like state in adult rats. We found early (1 week) upregulation of the GluN2B levels in the dorso-intermediate hippocampus and late (3 month) downregulation of GluN2A expression across the entire CA1 region. The ventral hippocampus did not exhibit subunit expression changes. These data suggest that a differing vulnerability of the hippocampal longitudinal axis may occur in response to MK801-treatment and provide a time-resolved view of the putative development of pathological changes of NMDAR subunit expression in the hippocampus that initiate with an emulated first episode and progress through to the chronic stabilization of a psychosis-like state in rodents.
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29
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Zhou HY, Li Z, Xie DJ, Xu T, Cheung EEF, Li H, Chan RCK. Heritability estimates of spatial working memory and set-shifting in a healthy Chinese twin sample: A preliminary study. Psych J 2018; 7:144-151. [DOI: 10.1002/pchj.227] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 06/06/2018] [Accepted: 07/02/2018] [Indexed: 11/07/2022]
Affiliation(s)
- Han-yu Zhou
- Neuropsychology and Applied Cognitive Neuroscience Laboratory, CAS Key Laboratory of Mental Health, Institute of Psychology; Chinese Academy of Sciences; Beijing China
- Department of Psychology; University of Chinese Academy of Sciences; Beijing China
- Department of Psychology; Renmin University of China; Beijing China
| | - Zhi Li
- Neuropsychology and Applied Cognitive Neuroscience Laboratory, CAS Key Laboratory of Mental Health, Institute of Psychology; Chinese Academy of Sciences; Beijing China
- Department of Psychology; University of Chinese Academy of Sciences; Beijing China
| | - Dong-jie Xie
- Neuropsychology and Applied Cognitive Neuroscience Laboratory, CAS Key Laboratory of Mental Health, Institute of Psychology; Chinese Academy of Sciences; Beijing China
- Department of Psychology; University of Chinese Academy of Sciences; Beijing China
| | - Ting Xu
- Key Laboratory of Behavioral Sciences and Magnetic Resonance Imaging Research Center; Institute of Psychology, Chinese Academy of Sciences; Beijing China
- Center for the Developing Brain; Child Mind Institute; New York New York USA
| | - Eric E. F. Cheung
- Castle Peak Hospital; Hong Kong Special Administrative Region; Tuen Mun China
| | - Huanhuan Li
- Department of Psychology; Renmin University of China; Beijing China
| | - Raymond C. K. Chan
- Neuropsychology and Applied Cognitive Neuroscience Laboratory, CAS Key Laboratory of Mental Health, Institute of Psychology; Chinese Academy of Sciences; Beijing China
- Department of Psychology; University of Chinese Academy of Sciences; Beijing China
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Metzner C, Mäki-Marttunen T, Zurowski B, Steuber V. Modules for Automated Validation and Comparison of Models of
Neurophysiological and Neurocognitive Biomarkers of Psychiatric Disorders:
ASSRUnit—A Case Study. COMPUTATIONAL PSYCHIATRY 2018. [DOI: 10.1162/cpsy_a_00015] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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31
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Impairment in delay discounting in schizophrenia and schizoaffective disorder but not primary mood disorders. NPJ SCHIZOPHRENIA 2018; 4:9. [PMID: 29808011 PMCID: PMC5972152 DOI: 10.1038/s41537-018-0050-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Revised: 03/27/2018] [Accepted: 04/04/2018] [Indexed: 12/26/2022]
Abstract
A measure of planning and impulse control, the delay-discounting (DD) task estimates the extent to which an individual decreases the perceived value of a reward as the reward is delayed. We examined cross-disorder performance between healthy controls (n = 88), individuals with bipolar disorder (n = 23), major depressive disorder (n = 43), and primary psychotic disorders (schizophrenia and schizoaffective disorder; n = 51) on the DD task (using a $10 delayed larger reward), as well as the interaction of DD scores with other symptom domains (cognition, psychosis, and affect). We found that individuals with schizophrenia and schizoaffective disorder display significantly greater rates of discounting compared to healthy controls, while individuals with a primary mood disorder do not differ from healthy controls after adjustment for IQ. Further, impairment in working memory is associated with higher discounting rates among individuals with schizophrenia and schizoaffective disorder, but cognitive dysfunction alone does not account for the extent of impairment in DD. Taken together, these results suggest an impaired ability to plan for the future and make adaptive decisions that are specific to individuals with psychotic disorders, and likely related to adverse functional outcomes. More generally, this work demonstrates the presence of variation in impulsivity across major psychiatric illnesses, supporting the use of a trans-diagnostic perspective. Patients with schizophrenia find it harder to delay gratification compared with patients diagnosed with other psychiatric disorders. Hannah Brown and colleagues in Roy Perlis’ lab at the Center for Quantitative Health at Massachusetts General Hospital, Boston, compared the performance of patients with bipolar disorder, major depressive disorder, schizophrenia, and healthy controls on a task that measures impulsivity. The delay discounting (DD) task assesses individuals’ ability to put off immediate pleasures for greater enjoyments later and is indicative of decision-making and planning behaviors. They found that certain aspects of cognitive dysfunction were associated with an increased preference for immediate rewards and that, even after adjusting for IQ, patients with schizophrenia showed significantly greater discounting rates compared with the other study participants. This variation in a specific measure of impulsivity suggests that the DD task could be used to better define aspects of impulsive behaviors across psychiatric disorders.
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Nielsen JD, Madsen KH, Wang Z, Liu Z, Friston KJ, Zhou Y. Working Memory Modulation of Frontoparietal Network Connectivity in First-Episode Schizophrenia. Cereb Cortex 2018; 27:3832-3841. [PMID: 28334138 DOI: 10.1093/cercor/bhx050] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Indexed: 11/14/2022] Open
Abstract
Working memory (WM) impairment is regarded as a core aspect of schizophrenia. However, the neural mechanisms behind this cognitive deficit remain unclear. The connectivity of a frontoparietal network is known to be important for subserving WM. Using functional magnetic resonance imaging, the current study investigated whether WM-dependent modulation of effective connectivity in this network is affected in a group of first-episode schizophrenia (FES) patients compared with similarly performing healthy participants during a verbal n-back task. Dynamic causal modeling (DCM) of the coupling between regions (left inferior frontal gyrus (IFG), left inferior parietal lobe (IPL), and primary visual area) identified in a psychophysiological interaction (PPI) analysis was performed to characterize effective connectivity during the n-back task. The PPI analysis revealed that the connectivity between the left IFG and left IPL was modulated by WM and that this modulation was reduced in FES patients. The subsequent DCM analysis confirmed this modulation by WM and found evidence that FES patients had reduced forward connectivity from IPL to IFG. These findings provide evidence for impaired WM modulation of frontoparietal effective connectivity in the early phase of schizophrenia, even with intact WM performance, suggesting a failure of context-sensitive coupling in the schizophrenic brain.
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Affiliation(s)
- Jesper Duemose Nielsen
- CAS Key Laboratory of Behavioral Science, Institute of Psychology, Beijing, PR China.,Sino-Danish Center for Education and Research, Aarhus, Denmark.,Department of Applied Mathematics and Computer Science, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Kristoffer H Madsen
- Department of Applied Mathematics and Computer Science, Technical University of Denmark, Kgs. Lyngby, Denmark.,Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital Hvidovre, Denmark
| | - Zheng Wang
- Mental Health Institute of the Second Xiangya Hospital, Central South University, Changsha, PR China
| | - Zhening Liu
- Mental Health Institute of the Second Xiangya Hospital, Central South University, Changsha, PR China
| | - Karl J Friston
- Wellcome Trust Centre for Neuroimaging, University College London, London, UK
| | - Yuan Zhou
- CAS Key Laboratory of Behavioral Science, Institute of Psychology, Beijing, PR China.,Wellcome Trust Centre for Neuroimaging, University College London, London, UK.,Department of Psychology, University of Chinese Academy of Sciences, Beijing, PR China
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Hiroi N. Critical reappraisal of mechanistic links of copy number variants to dimensional constructs of neuropsychiatric disorders in mouse models. Psychiatry Clin Neurosci 2018; 72:301-321. [PMID: 29369447 PMCID: PMC5935536 DOI: 10.1111/pcn.12641] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 12/27/2017] [Accepted: 01/19/2018] [Indexed: 12/17/2022]
Abstract
Copy number variants are deletions and duplications of a few thousand to million base pairs and are associated with extraordinarily high levels of autism spectrum disorder, schizophrenia, intellectual disability, or attention-deficit hyperactivity disorder. The unprecedented levels of robust and reproducible penetrance of copy number variants make them one of the most promising and reliable entry points to delve into the mechanistic bases of many mental disorders. However, the precise mechanistic bases of these associations still remain elusive in humans due to the many genes encoded in each copy number variant and the diverse associated phenotypic features. Genetically engineered mice have provided a technical means to ascertain precise genetic mechanisms of association between copy number variants and dimensional aspects of mental illnesses. Molecular, cellular, and neuronal phenotypes can be detected as potential mechanistic substrates for various behavioral constructs of mental illnesses. However, mouse models come with many technical pitfalls. Genetic background is not well controlled in many mouse models, leading to rather obvious interpretative issues. Dose alterations of many copy number variants and single genes within copy number variants result in some molecular, cellular, and neuronal phenotypes without a behavioral phenotype or with a behavioral phenotype opposite to what is seen in humans. In this review, I discuss technical and interpretative pitfalls of mouse models of copy number variants and highlight well-controlled studies to suggest potential neuronal mechanisms of dimensional aspects of mental illnesses. Mouse models of copy number variants represent toeholds to achieve a better understanding of the mechanistic bases of dimensions of neuropsychiatric disorders and thus for development of mechanism-based therapeutic options in humans.
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Affiliation(s)
- Noboru Hiroi
- Department of Psychiatry and Behavioral Sciences, Albert Einstein College of Medicine, New York, USA.,Department of Neuroscience, Albert Einstein College of Medicine, New York, USA.,Department of Genetics, Albert Einstein College of Medicine, New York, USA
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Kupferschmidt DA, Gordon JA. The dynamics of disordered dialogue: Prefrontal, hippocampal and thalamic miscommunication underlying working memory deficits in schizophrenia. Brain Neurosci Adv 2018; 2. [PMID: 31058245 PMCID: PMC6497416 DOI: 10.1177/2398212818771821] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The prefrontal cortex is central to the orchestrated brain network communication that gives rise to working memory and other cognitive functions. Accordingly, working memory deficits in schizophrenia are increasingly thought to derive from prefrontal cortex dysfunction coupled with broader network disconnectivity. How the prefrontal cortex dynamically communicates with its distal network partners to support working memory and how this communication is disrupted in individuals with schizophrenia remain unclear. Here we review recent evidence that prefrontal cortex communication with the hippocampus and thalamus is essential for normal spatial working memory, and that miscommunication between these structures underlies spatial working memory deficits in schizophrenia. We focus on studies using normal rodents and rodent models designed to probe schizophrenia-related pathology to assess the dynamics of neural interaction between these brain regions. We also highlight recent preclinical work parsing roles for long-range prefrontal cortex connections with the hippocampus and thalamus in normal and disordered spatial working memory. Finally, we discuss how emerging rodent endophenotypes of hippocampal- and thalamo-prefrontal cortex dynamics in spatial working memory could translate into richer understanding of the neural bases of cognitive function and dysfunction in humans.
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Affiliation(s)
- David A Kupferschmidt
- Integrative Neuroscience Section, National Institute of Neurological Disorders and Stroke, Bethesda, MD, USA
| | - Joshua A Gordon
- Integrative Neuroscience Section, National Institute of Neurological Disorders and Stroke, Bethesda, MD, USA.,National Institute of Mental Health, Bethesda, MD, USA
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35
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Deficits in visual working-memory capacity and general cognition in African Americans with psychosis. Schizophr Res 2018; 193:100-106. [PMID: 28843437 PMCID: PMC5825248 DOI: 10.1016/j.schres.2017.08.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Revised: 08/10/2017] [Accepted: 08/11/2017] [Indexed: 01/22/2023]
Abstract
On average, patients with psychosis perform worse than controls on visual change-detection tasks, implying that psychosis is associated with reduced capacity of visual working memory (WM). In the present study, 79 patients diagnosed with various psychotic disorders and 166 controls, all African Americans, completed a change-detection task and several other neurocognitive measures. The aims of the study were to (1) determine whether we could observe a between-group difference in performance on the change-detection task in this sample; (2) establish whether such a difference could be specifically attributed to reduced WM capacity (k); and (3) estimate k in the context of the general cognitive deficit in psychosis. Consistent with previous studies, patients performed worse than controls on the change-detection task, on average. Bayesian hierarchical cognitive modeling of the data suggested that this between-group difference was driven by reduced k in patients, rather than differences in other psychologically meaningful model parameters (guessing behavior and lapse rate). Using the same modeling framework, we estimated the effect of psychosis on k while controlling for general intellectual ability (g, obtained from the other neurocognitive measures). The results suggested that reduced k in patients was stronger than predicted by the between-group difference in g. Moreover, a mediation analysis suggested that the relationship between psychosis and g (i.e., the general cognitive deficit) was mediated by k. The results were consistent with the idea that reduced k is a specific deficit in psychosis, which contributes to the general cognitive deficit.
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36
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Nakashima M, Imada H, Shiraishi E, Ito Y, Suzuki N, Miyamoto M, Taniguchi T, Iwashita H. Phosphodiesterase 2A Inhibitor TAK-915 Ameliorates Cognitive Impairments and Social Withdrawal in N-Methyl-d-Aspartate Receptor Antagonist-Induced Rat Models of Schizophrenia. J Pharmacol Exp Ther 2018; 365:179-188. [PMID: 29440309 DOI: 10.1124/jpet.117.245506] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Accepted: 02/05/2018] [Indexed: 11/22/2022] Open
Abstract
The pathophysiology of schizophrenia has been associated with glutamatergic dysfunction. Modulation of the glutamatergic signaling pathway, including N-methyl-d-aspartate (NMDA) receptors, can provide a new therapeutic target for schizophrenia. Phosphodiesterase 2A (PDE2A) is highly expressed in the forebrain, and is a dual substrate enzyme that hydrolyzes both cAMP and cGMP, which play pivotal roles as intracellular second messengers downstream of NMDA receptors. Here we characterize the in vivo pharmacological profile of a selective and brain-penetrant PDE2A inhibitor, (N-{(1S)-1-[3-fluoro-4-(trifluoromethoxy)phenyl]-2-methoxyethyl}-7-methoxy-2-oxo-2,3-dihydropyrido[2,3-b]pyrazine-4(1H)-carboxamide) (TAK-915) as a novel treatment of schizophrenia. Oral administration of TAK-915 at 3 and 10 mg/kg significantly increased cGMP levels in the frontal cortex, hippocampus, and striatum of rats. TAK-915 at 10 mg/kg significantly upregulated the phosphorylation of α-amino-3-hydroxy-5-methylisoxazole-4-proprionic acid receptor subunit GluR1 in the rat hippocampus. TAK-915 at 3 and 10 mg/kg significantly attenuated episodic memory deficits induced by the NMDA receptor antagonist (+)-MK-801 hydrogen maleate (MK-801) in the rat passive avoidance test. TAK-915 at 10 mg/kg significantly attenuated working memory deficits induced by MK-801 in the rat radial arm maze test. Additionally, TAK-915 at 10 mg/kg prevented subchronic phencyclidine-induced social withdrawal in social interaction in rats. In contrast, TAK-915 did not produce antipsychotic-like activity; TAK-915 had little effect on MK-801- or methamphetamine-induced hyperlocomotion in rats. These results suggest that TAK-915 has a potential to ameliorate cognitive impairments and social withdrawal in schizophrenia.
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Affiliation(s)
- Masato Nakashima
- Neuroscience Drug Discovery Unit (M.N., H.Im., E.S., Y.I., N.S., T.T., H.Iw.) and Drug Metabolism and Pharmacokinetics Research Laboratories (M.M.), Research, Takeda Pharmaceutical Company Limited, Fujisawa, Japan
| | - Haruka Imada
- Neuroscience Drug Discovery Unit (M.N., H.Im., E.S., Y.I., N.S., T.T., H.Iw.) and Drug Metabolism and Pharmacokinetics Research Laboratories (M.M.), Research, Takeda Pharmaceutical Company Limited, Fujisawa, Japan
| | - Eri Shiraishi
- Neuroscience Drug Discovery Unit (M.N., H.Im., E.S., Y.I., N.S., T.T., H.Iw.) and Drug Metabolism and Pharmacokinetics Research Laboratories (M.M.), Research, Takeda Pharmaceutical Company Limited, Fujisawa, Japan
| | - Yuki Ito
- Neuroscience Drug Discovery Unit (M.N., H.Im., E.S., Y.I., N.S., T.T., H.Iw.) and Drug Metabolism and Pharmacokinetics Research Laboratories (M.M.), Research, Takeda Pharmaceutical Company Limited, Fujisawa, Japan
| | - Noriko Suzuki
- Neuroscience Drug Discovery Unit (M.N., H.Im., E.S., Y.I., N.S., T.T., H.Iw.) and Drug Metabolism and Pharmacokinetics Research Laboratories (M.M.), Research, Takeda Pharmaceutical Company Limited, Fujisawa, Japan
| | - Maki Miyamoto
- Neuroscience Drug Discovery Unit (M.N., H.Im., E.S., Y.I., N.S., T.T., H.Iw.) and Drug Metabolism and Pharmacokinetics Research Laboratories (M.M.), Research, Takeda Pharmaceutical Company Limited, Fujisawa, Japan
| | - Takahiko Taniguchi
- Neuroscience Drug Discovery Unit (M.N., H.Im., E.S., Y.I., N.S., T.T., H.Iw.) and Drug Metabolism and Pharmacokinetics Research Laboratories (M.M.), Research, Takeda Pharmaceutical Company Limited, Fujisawa, Japan
| | - Hiroki Iwashita
- Neuroscience Drug Discovery Unit (M.N., H.Im., E.S., Y.I., N.S., T.T., H.Iw.) and Drug Metabolism and Pharmacokinetics Research Laboratories (M.M.), Research, Takeda Pharmaceutical Company Limited, Fujisawa, Japan
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Abstract
Schizophrenia is a complex disorder lacking an effective treatment option for the pervasive and debilitating cognitive impairments experienced by patients. Working memory is a core cognitive function impaired in schizophrenia that depends upon activation of distributed neural network, including the circuitry of the dorsolateral prefrontal cortex (DLPFC). Accordingly, individuals diagnosed with schizophrenia show reduced DLPFC activation while performing working-memory tasks. This lower DLPFC activation appears to be an integral part of the disease pathophysiology, and not simply a reflection of poor performance. Thus, the cellular and circuitry alterations that underlie lower DLPFC neuronal activity in schizophrenia must be determined in order to identify appropriate therapeutic targets. Studies using human postmortem brain tissue provide a robust way to investigate and characterize these cellular and circuitry alterations at multiple levels of resolution, and such studies provide essential information that cannot be obtained either through in vivo studies in humans or through experimental animal models. Studies examining neuronal morphology, protein expression and localization, and transcript levels indicate that a microcircuit composed of excitatory pyramidal cells and inhibitory interneurons containing the calcium-binding protein parvalbumin is altered in the DLPFC of subjects with schizophrenia and likely contributes to DLPFC dysfunction.
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Affiliation(s)
- Jill R Glausier
- Translational Neuroscience Program, Department of Psychiatry, University of Pittsburgh, Pittsburgh, PA, United States
| | - David A Lewis
- Translational Neuroscience Program, Department of Psychiatry, University of Pittsburgh, Pittsburgh, PA, United States.
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Mayer JS, Stäblein M, Oertel-Knöchel V, Fiebach CJ. Functional Dissociation of Confident and Not-Confident Errors in the Spatial Delayed Response Task Demonstrates Impairments in Working Memory Encoding and Maintenance in Schizophrenia. Front Psychiatry 2018; 9:202. [PMID: 29896123 PMCID: PMC5987160 DOI: 10.3389/fpsyt.2018.00202] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Accepted: 05/02/2018] [Indexed: 12/30/2022] Open
Abstract
Even though extensively investigated, the nature of working memory (WM) deficits in patients with schizophrenia (PSZ) is not yet fully understood. In particular, the contribution of different WM sub-processes to the severe WM deficit observed in PSZ is a matter of debate. So far, most research has focused on impaired WM maintenance. By analyzing different types of errors in a spatial delayed response task (DRT), we have recently demonstrated that incorrect yet confident responses (which we labeled as false memory errors) rather than incorrect/not-confident responses reflect failures of WM encoding, which was also impaired in PSZ. In the present study, we provide further evidence for a functional dissociation between confident and not-confident errors by manipulating the demands on WM maintenance, i.e., the length over which information has to be maintained in WM. Furthermore, we investigate whether these functionally distinguishable WM processes are impaired in PSZ. Twenty-four PSZ and 24 demographically matched healthy controls (HC) performed a spatial DRT in which the length of the delay period was varied between 1, 2, 4, and 6 s. In each trial, participants also rated their level of response confidence. Across both groups, longer delays led to increased rates of incorrect/not-confident responses, while incorrect/confident responses were not affected by delay length. This functional dissociation provides additional support for our proposal that false memory errors (i.e., confident errors) reflect problems at the level of WM encoding, while not-confident errors reflect failures of WM maintenance. Schizophrenic patients showed increased numbers of both confident and not-confident errors, suggesting that both sub-processes of WM-encoding and maintenance-are impaired in schizophrenia. Combined with the delay length-dependent functional dissociation, we propose that these impairments in schizophrenic patients are functionally distinguishable.
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Affiliation(s)
- Jutta S Mayer
- Department of Psychology, Goethe University, Frankfurt, Germany.,Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, University Hospital Frankfurt, Goethe University, Frankfurt, Germany
| | - Michael Stäblein
- Department of Psychiatry, Psychosomatic Medicine and Psychotherapy, University Hospital Frankfurt, Goethe University, Frankfurt, Germany
| | - Viola Oertel-Knöchel
- Department of Psychiatry, Psychosomatic Medicine and Psychotherapy, University Hospital Frankfurt, Goethe University, Frankfurt, Germany
| | - Christian J Fiebach
- Department of Psychology, Goethe University, Frankfurt, Germany.,Brain Imaging Center, Goethe University, Frankfurt, Germany
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39
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Zhou Y, Zeidman P, Wu S, Razi A, Chen C, Yang L, Zou J, Wang G, Wang H, Friston KJ. Altered intrinsic and extrinsic connectivity in schizophrenia. NEUROIMAGE-CLINICAL 2017; 17:704-716. [PMID: 29264112 PMCID: PMC5726753 DOI: 10.1016/j.nicl.2017.12.006] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 09/25/2017] [Accepted: 12/03/2017] [Indexed: 01/12/2023]
Abstract
Schizophrenia is a disorder characterized by functional dysconnectivity among distributed brain regions. However, it is unclear how causal influences among large-scale brain networks are disrupted in schizophrenia. In this study, we used dynamic causal modeling (DCM) to assess the hypothesis that there is aberrant directed (effective) connectivity within and between three key large-scale brain networks (the dorsal attention network, the salience network and the default mode network) in schizophrenia during a working memory task. Functional MRI data during an n-back task from 40 patients with schizophrenia and 62 healthy controls were analyzed. Using hierarchical modeling of between-subject effects in DCM with Parametric Empirical Bayes, we found that intrinsic (within-region) and extrinsic (between-region) effective connectivity involving prefrontal regions were abnormal in schizophrenia. Specifically, in patients (i) inhibitory self-connections in prefrontal regions of the dorsal attention network were decreased across task conditions; (ii) extrinsic connectivity between regions of the default mode network was increased; specifically, from posterior cingulate cortex to the medial prefrontal cortex; (iii) between-network extrinsic connections involving the prefrontal cortex were altered; (iv) connections within networks and between networks were correlated with the severity of clinical symptoms and impaired cognition beyond working memory. In short, this study revealed the predominance of reduced synaptic efficacy of prefrontal efferents and afferents in the pathophysiology of schizophrenia. A first use of hierarchical modeling of effective connectivity to characterize large-scale networks in schizophrenia. Intrinsic and extrinsic effective connectivity involving prefrontal regions were abnormal in schizophrenia. Diagnostic connections could predict the severity of clinical symptoms and cognition in schizophrenia.
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Affiliation(s)
- Yuan Zhou
- CAS Key Laboratory of Behavioral Science, Institute of Psychology, Beijing 100101, China; Magnetic Resonance Imaging Research Center, Institute of Psychology, Chinese Academy of Sciences, Beijing 100101,China; Department of Psychology, University of Chinese Academy of Sciences, Beijing 100049, China; The Wellcome Trust Centre for Neuroimaging, University College London, Queen Square, London WC1N 3BG, UK.
| | - Peter Zeidman
- The Wellcome Trust Centre for Neuroimaging, University College London, Queen Square, London WC1N 3BG, UK
| | - Shihao Wu
- Department of Psychiatry, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Adeel Razi
- The Wellcome Trust Centre for Neuroimaging, University College London, Queen Square, London WC1N 3BG, UK; Department of Electronic Engineering, NED University of Engineering and Technology, Karachi, Pakistan
| | - Cheng Chen
- Department of Psychiatry, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Liuqing Yang
- CAS Key Laboratory of Behavioral Science, Institute of Psychology, Beijing 100101, China; Department of Psychology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jilin Zou
- Department of Psychiatry, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Gaohua Wang
- Department of Psychiatry, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Huiling Wang
- Department of Psychiatry, Renmin Hospital of Wuhan University, Wuhan 430060, China; Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan 430071, China.
| | - Karl J Friston
- The Wellcome Trust Centre for Neuroimaging, University College London, Queen Square, London WC1N 3BG, UK
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40
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Pentaraki A, Utoblo B, Kokkoli EM. Cognitive remediation therapy plus standard care versus standard care for people with schizophrenia. Hippokratia 2017. [DOI: 10.1002/14651858.cd012865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Alexandra Pentaraki
- University of Liverpool Online Programs (in partnership with Laureate Online Education); Applied Psychology and Mental Health; Liverpool UK
- King's College London; Institute of Psychiatry, Psychology and Neuroscience; De Crespigny Park London UK SE5 8AF
- Brain Matters Institute; Thessaloniki Greece
| | - Bello Utoblo
- Leeds Beckett University; School of Health and Community Studies; Portland Way Leeds UK
| | - Eleni Maria Kokkoli
- City College, University of Sheffield; Department of Psychology; 24 Proxenou Koromila Street Kalamaria Thessaloniki Greece 546 22
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41
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Lee H, Kim J. Load-sensitive impairment of working memory for biological motion in schizophrenia. PLoS One 2017; 12:e0186498. [PMID: 29028821 PMCID: PMC5640230 DOI: 10.1371/journal.pone.0186498] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 10/03/2017] [Indexed: 11/18/2022] Open
Abstract
Impaired working memory (WM) is a core cognitive deficit in schizophrenia. Nevertheless, past studies have reported that patients may also benefit from increasing salience of memory stimuli. Such efficient encoding largely depends upon precise perception. Thus an investigation on the relationship between perceptual processing and WM would be worthwhile. Here, we used biological motion (BM), a socially relevant stimulus that schizophrenics have difficulty discriminating from similar meaningless motions, in a delayed-response task. Non-BM stimuli and static polygons were also used for comparison. In each trial, one of the three types of stimuli was presented followed by two probes, with a short delay in between. Participants were asked to indicate whether one of them was identical to the memory item or both were novel. The number of memory items was one or two. Healthy controls were more accurate in recognizing BM than non-BM regardless of memory loads. Patients with schizophrenia exhibited similar accuracy patterns to those of controls in the Load 1 condition only. These results suggest that information contained in BM could facilitate WM encoding in general, but the effect is vulnerable to the increase of cognitive load in schizophrenia, implying inefficient encoding driven by imprecise perception.
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Affiliation(s)
- Hannah Lee
- Department of Psychology, Duksung Women’s University, Seoul, Republic of Korea
| | - Jejoong Kim
- Department of Psychology, Duksung Women’s University, Seoul, Republic of Korea
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42
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Eckfeld A, Karlsgodt KH, Haut KM, Bachman P, Jalbrzikowski M, Zinberg J, van Erp TGM, Cannon TD, Bearden CE. Disrupted Working Memory Circuitry in Adolescent Psychosis. Front Hum Neurosci 2017; 11:394. [PMID: 28848413 PMCID: PMC5550407 DOI: 10.3389/fnhum.2017.00394] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2017] [Accepted: 07/17/2017] [Indexed: 12/02/2022] Open
Abstract
Individuals with schizophrenia (SZ) consistently show deficits in spatial working memory (WM) and associated atypical patterns of neural activity within key WM regions, including the dorsolateral prefrontal cortex (dlPFC) and parietal cortices. However, little research has focused on adolescent psychosis (AP) and potential age-associated disruptions of WM circuitry that may occur in youth with this severe form of illness. Here we utilized each subject's individual spatial WM capacity to investigate task-based neural dysfunction in 17 patients with AP (16.58 ± 2.60 years old) as compared to 17 typically developing, demographically comparable adolescents (18.07 ± 3.26 years old). AP patients showed lower behavioral performance at higher WM loads and lower overall WM capacity compared to healthy controls. Whole-brain activation analyses revealed greater bilateral precentral and right postcentral activity in controls relative to AP patients, when controlling for individual WM capacity. Seed-based psychophysiological interaction (PPI) analyses revealed significantly greater co-activation between the left dlPFC and left frontal pole in controls relative to AP patients. Significant group-by-age interactions were observed in both whole-brain and PPI analyses, with AP patients showing atypically greater neural activity and stronger coupling between WM task activated brain regions as a function of increasing age. Additionally, AP patients demonstrated positive relationships between right dlPFC neural activity and task performance, but unlike healthy controls, failed to show associations between neural activity and out-of-scanner neurocognitive performance. Collectively, these findings are consistent with atypical WM-related functioning and disrupted developmental processes in youth with AP.
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Affiliation(s)
- Ariel Eckfeld
- Department of Psychology, UCLALos Angeles, CA, United States
| | | | - Kristen M. Haut
- Department of Psychiatry, Rush University Medical CenterChicago, IL, United States
| | - Peter Bachman
- Department of Psychiatry, University of PittsburghPittsburgh, PA, United States
| | - Maria Jalbrzikowski
- Department of Psychiatry, University of PittsburghPittsburgh, PA, United States
| | - Jamie Zinberg
- Semel Institute for Neuroscience and Human Behavior, UCLALos Angeles, CA, United States
| | - Theo G. M. van Erp
- Department of Psychiatry and Human Behavior, University of California, IrvineIrvine, CA, United States
| | - Tyrone D. Cannon
- Departments of Psychology and Psychiatry, Yale UniversityNew Haven, CT, United States
| | - Carrie E. Bearden
- Department of Psychology, UCLALos Angeles, CA, United States
- Semel Institute for Neuroscience and Human Behavior, UCLALos Angeles, CA, United States
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43
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Electrophysiological Evidence for Hyperfocusing of Spatial Attention in Schizophrenia. J Neurosci 2017; 37:3813-3823. [PMID: 28283557 DOI: 10.1523/jneurosci.3221-16.2017] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2016] [Revised: 01/25/2017] [Accepted: 02/10/2017] [Indexed: 11/21/2022] Open
Abstract
A recently proposed hyperfocusing hypothesis of cognitive dysfunction in schizophrenia proposes that people with schizophrenia (PSZ) tend to concentrate processing resources more narrowly but more intensely than healthy control subjects (HCS). The present study tests a key prediction of this hypothesis, namely, that PSZ will hyperfocus on information presented at the center of gaze. This should lead to greater filtering of peripheral stimuli when the task requires focusing centrally but reduced filtering of central stimuli when the task requires attending broadly in the periphery. These predictions were tested in a double oddball paradigm, in which frequent standard stimuli and rare oddball stimuli were presented at central and peripheral locations while event-related potentials were recorded. Participants were instructed to discriminate between the standard and oddball stimuli at either the central location or at the peripheral locations. PSZ and HCS showed opposite patterns of spatial bias at the level of early sensory processing, as assessed with the P1 component: PSZ exhibited stronger sensory suppression of peripheral stimuli when the task required attending narrowly to the central location, whereas HCS exhibited stronger sensory suppression of central stimuli when the task required attending broadly to the peripheral locations. Moreover, PSZ exhibited a stronger stimulus categorization response than HCS, as assessed with the P3b component, for central stimuli when the task required attending to the peripheral region. These results provide strong evidence of hyperfocusing in PSZ, which may provide a unified mechanistic account of multiple aspects of cognitive dysfunction in schizophrenia.SIGNIFICANCE STATEMENT Schizophrenia clearly involves impaired attention, but attention is complex, and delineating the precise nature of attentional dysfunction in schizophrenia has been difficult. The present study tests a new hyperfocusing hypothesis, which proposes that people with schizophrenia (PSZ) tend to concentrate processing resources more intensely but more narrowly than healthy control subjects (HCS). Using electrophysiological measures of sensory and cognitive processing, we found that PSZ were actually superior to HCS in focusing attention at the point of gaze and filtering out peripheral distractors when the task required a narrow focusing of attention. This finding of superior filtering in PSZ supports the hyperfocusing hypothesis, which may provide the mechanism underlying a broad range of cognitive impairments in schizophrenia.
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44
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Stone JM, Morrison PD, Koychev I, Gao F, Reilly TJ, Kolanko M, Mohammadinasab A, Kapur S, McGuire PK. The effect of sodium nitroprusside on psychotic symptoms and spatial working memory in patients with schizophrenia: a randomized, double-blind, placebo-controlled trial. Psychol Med 2016; 46:3443-3450. [PMID: 27655012 DOI: 10.1017/s0033291716002245] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND Sodium nitroprusside (SNP) has been reported to rapidly reduce psychotic symptoms in patients with schizophrenia. This has the potential to revolutionize treatment for schizophrenia. In this study, we tested the hypothesis that SNP leads to a reduction in psychotic symptoms and an improvement in spatial working memory (SWM) performance in patients with schizophrenia. METHOD This was a single-centre, randomized, double-blind, placebo-controlled trial performed from 27 August 2014 to 10 February 2016 (clinicaltrials.gov identifier: NCT02176044). Twenty patients with schizophrenia aged 18-60 years with a diagnosis of schizophrenia or schizoaffective disorder were recruited from psychiatric outpatient clinics in the South London and Maudsley NHS Trust, London, UK. Baseline symptoms were measured using the Positive and Negative Syndrome Scale (PANSS) and the 18-item Brief Psychiatric Rating Scale (BPRS-18), and SWM was assessed using the CANTAB computerized test. Participants received either an infusion of SNP (0.5 μg/kg per min for 4 h) or placebo and were re-assessed for symptoms and SWM performance immediately after the infusion, and 4 weeks later. RESULTS SNP did not lead to any reduction in psychotic symptoms or improvement in SWM performance compared to placebo. CONCLUSIONS Although this study was negative, it is possible that the beneficial effects of SNP may occur in patients with a shorter history of illness, or with more acute exacerbation of symptoms.
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Affiliation(s)
- J M Stone
- King's College London, Institute of Psychiatry Psychology and Neuroscience,London,UK
| | - P D Morrison
- King's College London, Institute of Psychiatry Psychology and Neuroscience,London,UK
| | - I Koychev
- King's College London, Institute of Psychiatry Psychology and Neuroscience,London,UK
| | - F Gao
- King's College London, Institute of Psychiatry Psychology and Neuroscience,London,UK
| | - T J Reilly
- King's College London, Institute of Psychiatry Psychology and Neuroscience,London,UK
| | - M Kolanko
- King's College London, Institute of Psychiatry Psychology and Neuroscience,London,UK
| | - A Mohammadinasab
- King's College London, Institute of Psychiatry Psychology and Neuroscience,London,UK
| | - S Kapur
- King's College London, Institute of Psychiatry Psychology and Neuroscience,London,UK
| | - P K McGuire
- King's College London, Institute of Psychiatry Psychology and Neuroscience,London,UK
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45
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Dachtler J, Ivorra JL, Rowland TE, Lever C, Rodgers RJ, Clapcote SJ. Heterozygous deletion of α-neurexin I or α-neurexin II results in behaviors relevant to autism and schizophrenia. Behav Neurosci 2016; 129:765-76. [PMID: 26595880 PMCID: PMC4655861 DOI: 10.1037/bne0000108] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The neurexins are a family of presynaptic cell adhesion molecules. Human genetic studies have found heterozygous deletions affecting NRXN1 and NRXN2, encoding α-neurexin I (Nrxn1α) and α-neurexin II (Nrxn2α), in individuals with autism spectrum disorders and schizophrenia. However, the link between α-neurexin deficiency and the manifestation of psychiatric disorders remain unclear. To assess whether the heterozygous loss of neurexins results in behaviors relevant to autism or schizophrenia, we used mice with heterozygous (HET) deletion of Nrxn1α or Nrxn2α. We found that in a test of social approach, Nrxn1α HET mice show no social memory for familiar versus novel conspecifics. In a passive avoidance test, female Nrxn1α HET mice cross to the conditioned chamber sooner than female wild-type and Nrxn2α HET mice. Nrxn2α HET mice also express a lack of long-term object discrimination, indicating a deficit in cognition. The observed Nrxn1α and Nrxn2α genotypic effects were specific, as neither HET deletion had effects on a wide range of other behavioral measures, including several measures of anxiety. Our findings demonstrate that the heterozygous loss of α-neurexin I and α-neurexin II in mice leads to phenotypes relevant to autism and schizophrenia.
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Affiliation(s)
| | | | | | | | - R John Rodgers
- Institute of Psychological Sciences, University of Leeds
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46
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Wang L, Wu L, Lin X, Zhang Y, Zhou H, Du X, Dong G. Altered brain functional networks in people with Internet gaming disorder: Evidence from resting-state fMRI. Psychiatry Res Neuroimaging 2016; 254:156-163. [PMID: 27447451 DOI: 10.1016/j.pscychresns.2016.07.001] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Revised: 06/11/2016] [Accepted: 07/05/2016] [Indexed: 01/28/2023]
Abstract
Although numerous neuroimaging studies have detected structural and functional abnormality in specific brain regions and connections in subjects with Internet gaming disorder (IGD), the topological organization of the whole-brain network in IGD remain unclear. In this study, we applied graph theoretical analysis to explore the intrinsic topological properties of brain networks in Internet gaming disorder (IGD). 37 IGD subjects and 35 matched healthy control (HC) subjects underwent a resting-state functional magnetic resonance imaging scan. The functional networks were constructed by thresholding partial correlation matrices of 90 brain regions. Then we applied graph-based approaches to analysis their topological attributes, including small-worldness, nodal metrics, and efficiency. Both IGD and HC subjects show efficient and economic brain network, and small-world topology. Although there was no significant group difference in global topology metrics, the IGD subjects showed reduced regional centralities in the prefrontal cortex, left posterior cingulate cortex, right amygdala, and bilateral lingual gyrus, and increased functional connectivity in sensory-motor-related brain networks compared to the HC subjects. These results imply that people with IGD may be associated with functional network dysfunction, including impaired executive control and emotional management, but enhanced coordination among visual, sensorimotor, auditory and visuospatial systems.
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Affiliation(s)
- Lingxiao Wang
- Department of Psychology, Zhejiang Normal University, Jinhua, China
| | - Lingdan Wu
- Department of Psychology, University of Konstanz, Konstanz, Germany
| | - Xiao Lin
- Center for Life Science, Peking University, Beijing, China
| | - Yifen Zhang
- Department of Psychology, Zhejiang Normal University, Jinhua, China
| | - Hongli Zhou
- Department of Psychology, Zhejiang Normal University, Jinhua, China
| | - Xiaoxia Du
- Department of Physics, Shanghai Key Laboratory of Magnetic Resonance, East China Normal University, Shanghai, China
| | - Guangheng Dong
- Department of Psychology, Zhejiang Normal University, Jinhua, China.
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47
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CB2 Cannabinoid Receptor Knockout in Mice Impairs Contextual Long-Term Memory and Enhances Spatial Working Memory. Neural Plast 2015; 2016:9817089. [PMID: 26819779 PMCID: PMC4706977 DOI: 10.1155/2016/9817089] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 08/25/2015] [Accepted: 09/09/2015] [Indexed: 12/21/2022] Open
Abstract
Neurocognitive effects of cannabinoids have been extensively studied with a focus on CB1 cannabinoid receptors because CB1 receptors have been considered the major cannabinoid receptor in the nervous system. However, recent discoveries of CB2 cannabinoid receptors in the brain demand accurate determination of whether and how CB2 receptors are involved in the cognitive effects of cannabinoids. CB2 cannabinoid receptors are primarily involved in immune functions, but also implicated in psychiatric disorders such as schizophrenia and depression. Here, we examined the effects of CB2 receptor knockout in mice on memory to determine the roles of CB2 receptors in modulating cognitive function. Behavioral assays revealed that hippocampus-dependent, long-term contextual fear memory was impaired whereas hippocampus-independent, cued fear memory was normal in CB2 receptor knockout mice. These mice also displayed enhanced spatial working memory when tested in a Y-maze. Motor activity and anxiety of CB2 receptor knockout mice were intact when assessed in an open field arena and an elevated zero maze. In contrast to the knockout of CB2 receptors, acute blockade of CB2 receptors by AM603 in C57BL/6J mice had no effect on memory, motor activity, or anxiety. Our results suggest that CB2 cannabinoid receptors play diverse roles in regulating memory depending on memory types and/or brain areas.
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48
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Rodriguez M, Spaniel F, Konradova L, Sedlakova K, Dvorska K, Prajsova J, Kratochvilova Z, Levcik D, Vlcek K, Fajnerova I. Comparison of Visuospatial and Verbal Abilities in First Psychotic Episode of Schizophrenia Spectrum Disorder: Impact on Global Functioning and Quality of Life. Front Behav Neurosci 2015; 9:322. [PMID: 26733828 PMCID: PMC4683173 DOI: 10.3389/fnbeh.2015.00322] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2015] [Accepted: 11/11/2015] [Indexed: 11/25/2022] Open
Abstract
Objectives: Deficit in visuospatial functions can influence both simple and complex daily life activities. Despite the fact that visuospatial deficit was reported in schizophrenia, research on visuospatial functions as an independent entity is limited. Our study aims to elucidate the impact of visuospatial deficit in comparison with verbal deficit on global functioning and quality of life in the first psychotic episode of schizophrenia spectrum disorder (FES). The significance of clinical symptoms and antipsychotic medication was also studied. Methods: Thirty-six FES patients and a matched group of healthy controls (HC group) were assessed with a neuropsychological battery focused on visuospatial (VIS) and verbal (VERB) functions. Using multiple regression analysis, we evaluated the cumulative effect of VERB and VIS functions, psychiatric symptoms (PANSS) and antipsychotic medication on global functioning (GAF) and quality of life (WHOQOL-BREF) in the FES group. Results: The FES group demonstrated significant impairment both in VIS and VERB cognitive abilities compared to the HC group. Antipsychotic medication did not significantly affect either VIS or VERB functioning. PANSS was not related to cognitive functioning, apart from the Trail Making Test B. In the FES group, the GAF score was significantly affected by the severity of positive symptoms and VERB functioning, explaining together 60% of GAF variability. The severity of negative and positive symptoms affected only the Physical health domain of WHOQOL-BREF. The degree of VERB deficit was associated with both Physical and Psychological health. Although we did not find any relation between VIS functioning, GAF, and WHOQOL-BREF, a paradoxical finding emerged in the Environment quality domain, where a worse quality of the environment was associated with better VIS functioning. Conclusions: Our results suggest that the deficit in VIS functions is an integral part of cognitive deficit in schizophrenia spectrum disorders, rather than a side effect of symptomatology or antipsychotic medication. Moreover, VERB functioning was a better predictor of GAF and WHOQOL-BREF than VIS functioning. Given the findings of negative or missing effect of VIS deficit on WHOQOL-BREF and GAF, the accuracy of these measures in evaluating the impact of global cognitive deficit on everyday life in schizophrenia could be questioned.
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Affiliation(s)
- Mabel Rodriguez
- National IT System of Mental Health and Brain Monitoring, National Institute of Mental Health Klecany, Czech Republic
| | - Filip Spaniel
- National IT System of Mental Health and Brain Monitoring, National Institute of Mental HealthKlecany, Czech Republic; Department of Psychiatry and Medical Psychology, Third Faculty of Medicine, Charles University in PraguePrague, Czech Republic
| | - Lucie Konradova
- National IT System of Mental Health and Brain Monitoring, National Institute of Mental Health Klecany, Czech Republic
| | - Katerina Sedlakova
- National IT System of Mental Health and Brain Monitoring, National Institute of Mental HealthKlecany, Czech Republic; Department of Psychiatry and Medical Psychology, Third Faculty of Medicine, Charles University in PraguePrague, Czech Republic
| | - Karolina Dvorska
- Department of Psychiatry and Medical Psychology, Third Faculty of Medicine, Charles University in Prague Prague, Czech Republic
| | - Jitka Prajsova
- National IT System of Mental Health and Brain Monitoring, National Institute of Mental Health Klecany, Czech Republic
| | - Zuzana Kratochvilova
- National IT System of Mental Health and Brain Monitoring, National Institute of Mental Health Klecany, Czech Republic
| | - David Levcik
- Department of Neurophysiology of Memory, Institute of Physiology of the Czech Academy of Sciences Prague, Czech Republic
| | - Kamil Vlcek
- National IT System of Mental Health and Brain Monitoring, National Institute of Mental HealthKlecany, Czech Republic; Department of Neurophysiology of Memory, Institute of Physiology of the Czech Academy of SciencesPrague, Czech Republic
| | - Iveta Fajnerova
- National IT System of Mental Health and Brain Monitoring, National Institute of Mental HealthKlecany, Czech Republic; Department of Psychiatry and Medical Psychology, Third Faculty of Medicine, Charles University in PraguePrague, Czech Republic; Department of Neurophysiology of Memory, Institute of Physiology of the Czech Academy of SciencesPrague, Czech Republic
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Hvoslef-Eide M, Mar AC, Nilsson SRO, Alsiö J, Heath CJ, Saksida LM, Robbins TW, Bussey TJ. The NEWMEDS rodent touchscreen test battery for cognition relevant to schizophrenia. Psychopharmacology (Berl) 2015. [PMID: 26202612 DOI: 10.1007/s00213-015-4007-x] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
RATIONALE The NEWMEDS initiative (Novel Methods leading to New Medications in Depression and Schizophrenia, http://www.newmeds-europe.com ) is a large industrial-academic collaborative project aimed at developing new methods for drug discovery for schizophrenia. As part of this project, Work package 2 (WP02) has developed and validated a comprehensive battery of novel touchscreen tasks for rats and mice for assessing cognitive domains relevant to schizophrenia. OBJECTIVES This article provides a review of the touchscreen battery of tasks for rats and mice for assessing cognitive domains relevant to schizophrenia and highlights validation data presented in several primary articles in this issue and elsewhere. METHODS The battery consists of the five-choice serial reaction time task and a novel rodent continuous performance task for measuring attention, a three-stimulus visual reversal and the serial visual reversal task for measuring cognitive flexibility, novel non-matching to sample-based tasks for measuring spatial working memory and paired-associates learning for measuring long-term memory. RESULTS The rodent (i.e. both rats and mice) touchscreen operant chamber and battery has high translational value across species due to its emphasis on construct as well as face validity. In addition, it offers cognitive profiling of models of diseases with cognitive symptoms (not limited to schizophrenia) through a battery approach, whereby multiple cognitive constructs can be measured using the same apparatus, enabling comparisons of performance across tasks. CONCLUSION This battery of tests constitutes an extensive tool package for both model characterisation and pre-clinical drug discovery.
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Affiliation(s)
- M Hvoslef-Eide
- Department of Psychology, University of Cambridge, Downing Street, Cambridge, CB2 3EB, UK. .,MRC and Wellcome Trust Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge, CB2 3EB, UK.
| | - A C Mar
- Department of Psychology, University of Cambridge, Downing Street, Cambridge, CB2 3EB, UK.,MRC and Wellcome Trust Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge, CB2 3EB, UK.,Department of Neuroscience and Physiology, New York University Medical Center, New York, NY, 10016, USA
| | - S R O Nilsson
- Department of Psychology, University of Cambridge, Downing Street, Cambridge, CB2 3EB, UK.,MRC and Wellcome Trust Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge, CB2 3EB, UK
| | - J Alsiö
- Department of Psychology, University of Cambridge, Downing Street, Cambridge, CB2 3EB, UK.,MRC and Wellcome Trust Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge, CB2 3EB, UK.,Department of Neuroscience, Unit of Functional Neurobiology, University of Uppsala, 75124, Uppsala, Sweden
| | - C J Heath
- Department of Psychology, University of Cambridge, Downing Street, Cambridge, CB2 3EB, UK.,MRC and Wellcome Trust Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge, CB2 3EB, UK
| | - L M Saksida
- Department of Psychology, University of Cambridge, Downing Street, Cambridge, CB2 3EB, UK.,MRC and Wellcome Trust Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge, CB2 3EB, UK
| | - T W Robbins
- Department of Psychology, University of Cambridge, Downing Street, Cambridge, CB2 3EB, UK.,MRC and Wellcome Trust Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge, CB2 3EB, UK
| | - T J Bussey
- Department of Psychology, University of Cambridge, Downing Street, Cambridge, CB2 3EB, UK.,MRC and Wellcome Trust Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge, CB2 3EB, UK
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Siekmeier PJ. Computational modeling of psychiatric illnesses via well-defined neurophysiological and neurocognitive biomarkers. Neurosci Biobehav Rev 2015; 57:365-80. [DOI: 10.1016/j.neubiorev.2015.09.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Revised: 09/23/2015] [Accepted: 09/27/2015] [Indexed: 12/22/2022]
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