Journal of psychiatry and brain science最新文献

{"title":"Grant Report on d-Serine Augmentation of Neuroplasticity-Based Auditory Learning in Schizophrenia ^†.","authors":"Natalie de la Garrigue,&nbsp;Juliana Glasser,&nbsp;Pejman Sehatpour,&nbsp;Dan V Iosifescu,&nbsp;Elisa Dias,&nbsp;Marlene Carlson,&nbsp;Constance Shope,&nbsp;Tarek Sobeih,&nbsp;Tse-Hwei Choo,&nbsp;Melanie M Wall,&nbsp;Lawrence S Kegeles,&nbsp;James Gangwisch,&nbsp;Megan Mayer,&nbsp;Stephanie Brazis,&nbsp;Heloise M De Baun,&nbsp;Stephanie Wolfer,&nbsp;Dalton Bermudez,&nbsp;Molly Arnold,&nbsp;Danielle Rette,&nbsp;Amir M Meftah,&nbsp;Melissa Conant,&nbsp;Jeffrey A Lieberman,&nbsp;Joshua T Kantrowitz","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>We report on the rationale and design of an ongoing NIMH sponsored R61-R33 project in schizophrenia/schizoaffective disorder. This project studies augmenting the efficacy of auditory neuroplasticity cognitive remediation (AudRem) with d-serine, an <i>N</i>-methyl-d-aspartate-type glutamate receptor (NMDAR) glycine-site agonist. We operationalize improved (smaller) thresholds in pitch (frequency) between successive auditory stimuli after AudRem as improved plasticity, and mismatch negativity (MMN) and auditory θ as measures of functional target engagement of both NMDAR agonism and plasticity. Previous studies showed that AudRem alone produces significant, but small cognitive improvements, while d-serine alone improves symptoms and MMN. However, the strongest results for plasticity outcomes (improved pitch thresholds, auditory MMN and θ) were found when combining d-serine and AudRem. AudRem improvements correlated with reading and other auditory cognitive tasks, suggesting plasticity improvements are predictive of functionally relevant outcomes. While d-serine appears to be efficacious for acute AudRem enhancement, the optimal dose remains an open question, as does the ability of combined d-serine + AudRem to produce sustained improvement. In the ongoing R61, 45 schizophrenia patients will be randomized to receive three placebo-controlled, double-blind d-serine + AudRem sessions across three separate 15 subject dose cohorts (80/100/120 mg/kg). Successful completion of the R61 is defined by ≥moderate effect size changes in target engagement and correlation with function, without safety issues. During the three-year R33, we will assess the sustained effects of d-serine + AudRem. In addition to testing a potentially viable treatment, this project will develop a methodology to assess the efficacy of novel NMDAR modulators, using d-serine as a \"gold-standard\".</p>","PeriodicalId":73912,"journal":{"name":"Journal of psychiatry and brain science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7448686/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38318672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Progress Report on EMBED: A Pragmatic Trial of User-Centered Clinical Decision Support to Implement EMergency Department-Initiated BuprenorphinE for Opioid Use Disorder.","authors":"Edward R Melnick, Bidisha Nath, Osama M Ahmed, Cynthia Brandt, David Chartash, James D Dziura, Erik P Hess, Wesley C Holland, Jason A Hoppe, Molly M Jeffery, Liliya Katsovich, Fangyong Li, Charles C Lu, Kaitlin Maciejewski, Matthew Maleska, Jodi A Mao, Shara Martel, Sean Michael, Hyung Paek, Mehul D Patel, Timothy F Platts-Mills, Haseena Rajeevan, Jessica M Ray, Rachel M Skains, William E Soares, Ashley Deutsch, Yauheni Solad, Gail D'Onofrio","doi":"10.20900/jpbs.20200003","DOIUrl":"10.20900/jpbs.20200003","url":null,"abstract":"<p><p>Buprenorphine (BUP) can safely and effectively reduce craving, overdose, and mortality rates in people with opioid use disorder (OUD). However, adoption of ED-initiation of BUP has been slow partly due to physician perception this practice is too complex and disruptive. We report progress of the ongoing EMBED (<i>EMergency department-initiated BuprenorphinE for opioid use Disorder)</i> project. This project is a five-year collaboration across five healthcare systems with the goal to develop, integrate, study, and disseminate user-centered Clinical Decision Support (CDS) to promote the adoption of Emergency Department (ED)-initiation of buprenorphine/naloxone (BUP) into routine emergency care. Soon to enter its third year, the project has already completed multiple milestones to achieve its goals including (1) user-centered design of the CDS prototype, (2) integration of the CDS into an automated electronic health record (EHR) workflow, (3) data coordination including derivation and validation of an EHR-based computable phenotype, (4) meeting all ethical and regulatory requirements to achieve a waiver of informed consent, (5) pilot testing of the intervention at a single site, and (6) launching a parallel group-randomized 18-month pragmatic trial in 20 EDs across 5 healthcare systems. Pilot testing of the intervention in a single ED was associated with increased rates of ED-initiated BUP and naloxone prescribing and a doubling of the number of unique physicians adopting the practice. The ongoing multi-center pragmatic trial will assess the intervention's effectiveness, scalability, and generalizability with a goal to shift the emergency care paradigm for OUD towards early identification and treatment.</p><p><strong>Trial registration: </strong>Clinicaltrials.gov # NCT03658642.</p>","PeriodicalId":73912,"journal":{"name":"Journal of psychiatry and brain science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7164817/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37850636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Navigation Services to Avoid Rehospitalization among Medical/Surgical Patients with Comorbid Substance Use Disorder: Rationale and Design of a Randomized Controlled Trial.","authors":"Courtney D Nordeck,&nbsp;Christopher Welsh,&nbsp;Robert P Schwartz,&nbsp;Shannon G Mitchell,&nbsp;Kevin E O'Grady,&nbsp;Laura Dunlap,&nbsp;Gary Zarkin,&nbsp;Stephen Orme,&nbsp;Jan Gryczynski","doi":"10.20900/jpbs.20200013","DOIUrl":"https://doi.org/10.20900/jpbs.20200013","url":null,"abstract":"<p><p>Substance use disorders (SUDs) are associated with significant morbidity and mortality and contribute to inefficient use of healthcare services. Hospitalized medical/surgical patients with comorbid SUD are at elevated risk of hospital readmission and poor outcomes. Thus, effective interventions are needed to help such patients during hospitalization and post-discharge. This article reports the rationale, methodological design, and progress to date on a randomized trial comparing the effectiveness of Navigation Services to Avoid Rehospitalization (NavSTAR) vs Treatmentas-Usual (TAU) for hospital medical/surgical patients with comorbid SUD (<i>N</i> = 400). Applying Andersen's theoretical model of health service utilization, NavSTAR employed Patient Navigation and motivational interventions to promote entry into SUD treatment, facilitate adherence to recommendations for medical follow-up and self-care, address basic needs, and prevent the recurrent use of hospital services. As part of the NavSTAR service model, Patient Navigators embedded within the SUD consultation service at a large urban hospital delivered patient-centered, proactive navigation and motivational services initiated during the hospital stay and continued for up to 3 months post-discharge. Participants randomized to TAU received usual care from the hospital and the SUD consultation service, which included referral to SUD treatment but no continued contact post-hospital discharge. Hospital service utilization will be determined via review of electronic health records and the regional Health Information Exchange. Participants were assessed at baseline and again at 3-, 6-, and 12-month follow-up on various measures of healthcare utilization, substance use, and functioning. The primary outcome of interest is time-to-rehospitalization through 12 months. In addition, a range of secondary outcomes spanning the medical and SUD service areas will be assessed. The study will include a health economic evaluation of NavSTAR. If NavSTAR proves to be effective and cost-effective in this high-risk patient group, it would have important implications for addressing the needs of hospital patients with comorbid SUD, designing hospital discharge planning services, informing cost containment initiatives, and improving public health.</p>","PeriodicalId":73912,"journal":{"name":"Journal of psychiatry and brain science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9491361/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33478440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Perceptual Mechanisms of Visual Hallucinations and Illusions in Psychosis.","authors":"Samuel D Klein, Cheryl A Olman, Scott R Sponheim","doi":"10.20900/jpbs.20200020","DOIUrl":"10.20900/jpbs.20200020","url":null,"abstract":"<p><p>Psychosis has been associated with neural anomalies across a number of brain regions and cortical networks. Nevertheless, the exact pathophysiology of the disorder remains unclear. Aberrant visual perceptions such as hallucinations are evident in psychosis, while the occurrence of visual distortions is elevated in individuals with genetic liability for psychosis. The overall goals of this project are to: (1) use psychophysical tasks and neuroimaging to characterize deficits in visual perception; (2) acquire a mechanistic understanding of these deficits through development and validation of a computational model; and (3) determine if said mechanisms mark genetic liability for psychosis. Visual tasks tapping both low- and high-level visual processing are being completed as individuals with psychotic disorders (IPD), first-degree biological siblings of IPDs (SibIPDs) and healthy controls (HCs) undergo 248-channel magneto-encephalography (MEG) recordings followed by 7 Tesla functional magnetic resonance imaging (MRI). By deriving cortical source signals from MEG and MRI data, we will characterize the timing, location and coordination of neural processes. We hypothesize that IPDs prone to visual hallucinations will exhibit deviant functions within early visual cortex, and that aberrant contextual influences on visual perception will involve higher-level visual cortical regions and be associated with visual hallucinations. SibIPDs who experience visual distortions-but not hallucinations-are hypothesized to exhibit deficits in higher-order visual processing reflected in abnormal inter-regional neural synchronization. We hope the results lead to the development of targeted interventions for psychotic disorders, as well as identify useful biomarkers for aberrant neural functions that give rise to psychosis.</p>","PeriodicalId":73912,"journal":{"name":"Journal of psychiatry and brain science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7494209/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38492355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mobile Peer-Support for Opioid Use Disorders: Refinement of an Innovative Machine Learning Tool.","authors":"Caroline R Scherzer,&nbsp;Megan L Ranney,&nbsp;Shrenik Jain,&nbsp;Satya Prateek Bommaraju,&nbsp;John Patena,&nbsp;Kirsten Langdon,&nbsp;Evelyn Nimaja,&nbsp;Ernestine Jennings,&nbsp;Francesca L Beaudoin","doi":"10.20900/jpbs.20200001","DOIUrl":"https://doi.org/10.20900/jpbs.20200001","url":null,"abstract":"<p><strong>Background: </strong>The majority of individuals with Opioid Use Disorder (OUD) do not receive any formal substance use treatment. Due to limited engagement and access to traditional treatment, there is increasing evidence that patients with OUDs turn to online social platforms to access peer support and obtain health-related information about addiction and recovery. Interacting with peers before and during recovery is a key component of many evidence-based addiction recovery programs, and may improve self-efficacy and treatment engagement as well as reduce relapse. Commonly-used online social platforms are limited in utility and scalability as an adjunct to addiction treatment; lack effective content moderation (e.g., misinformed advice, maliciousness or \"trolling\"); and lack common security and ethical safeguards inherent to clinical care.</p><p><strong>Methods: </strong>This present study will develop a novel, artificial-intelligence (AI) enabled, mobile treatment delivery method that fulfills the need for a robust, secure, technology-based peer support platform to support patients with OUD. Forty adults receiving outpatient buprenorphine treatment for OUD will be asked to pilot a smartphone-based mobile peer support application, the \"Marigold App\", for a duration of six weeks. The program will use (1) a prospective cohort study to obtain text message content and feasibility metrics, and (2) qualitative interviews to evaluate usability and acceptability of the mobile platform.</p><p><strong>Anticipated findings and future directions: </strong>The Marigold mobile platform will allow patients to access a tailored chat support group 24/7 as a complement to different forms of clinical OUD treatment. Marigold can keep groups safe and constructive by augmenting chats with AI tools capable of understanding the emotional sentiment in messages, automatically \"flagging\" critical or clinically relevant content. This project will demonstrate the robustness of these AI tools by adapting them to catch OUD-specific \"flags\" in peer messages while also examining the adoptability of the platform itself within OUD patients.</p>","PeriodicalId":73912,"journal":{"name":"Journal of psychiatry and brain science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7059630/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37718371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An Historical Perspective on Psychiatric Genetics, the International Society of Psychiatric Genetics and the Role of Elliot Gershon","authors":"L. DeLisi","doi":"10.20900/jpbs.20190015","DOIUrl":"https://doi.org/10.20900/jpbs.20190015","url":null,"abstract":"Psychiatric Genetics is a relatively new field that was defined by groups of researchers interested in the familial aggregation of psychiatric disorders, and spurred on by the escalating new field of molecular genetics beginning in the 1980s. This manuscript contributes to a special issue honoring the career of Elliot S. Gershon, a true pioneer and critical thinker, who contributed substantially to the development of this field and also its stimulating meetings that brought colleagues together to discuss the latest research findings. It details the role Dr. Gershon played in establishing the precursor of the International Society of Psychiatric Genetics (ISPG) and how he remains in a leadership role on its Board of Directors and was honored with one of the ISPG Lifetime Achievement Awards.","PeriodicalId":73912,"journal":{"name":"Journal of psychiatry and brain science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67610439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Endophenotype Potential of Nucleus Accumbens Functional Connectivity: Effects of Polygenic Risk for Schizophrenia Interacting with Childhood Adversity","authors":"C. Eberle, Y. Peterse, Filip Jukic, B. Müller-Myhsok, D. Czamara, Jade Martins, Vanessa Schmoll, M. Czisch, E. Binder, P. Sämann","doi":"10.20900/JPBS.20190011","DOIUrl":"https://doi.org/10.20900/JPBS.20190011","url":null,"abstract":"Epidemiological and genetic studies suggest that schizophrenia (SCZ) is associated with both polygenic and environmental risk factors. Little is known if these factors project on common functional circuits relevant to the pathophysiology of SCZ. Here we focussed on resting state functional MRI (rsfMRI) as a biological measure to investigate if genetic and environmental factors for SCZ risk affect the same circuits in healthy controls as well as patients. For this, we compared the effects of a polygenic risk score for SCZ (PGRS), childhood adversity (CA) and their interaction on functional connectivity density (FCD) mapping and nucleus accumbens (NAcc) seed connectivity between 23 patients with SCZ or schizoaffective disorder and 253 healthy subjects. Patients demonstrated strong FCD increases compared with healthy controls mainly in subcortical nuclei including the NAcc, replicating previous reports. In healthy subjects, FCD of the NAcc was positively correlated with both the PGRS and the PGRS-CA-interaction. Both for high PGRS and PGRS-CA-interaction, fine-mapping revealed higher connectivity between the NAcc and visual association cortices. In conclusion, polygenic risk for SCZ shifted global and regionally specific connectivity of the NAcc in healthy subjects into the direction of the connectivity pattern observed in SCZ, and this shift was intensified by higher levels of CA.","PeriodicalId":73912,"journal":{"name":"Journal of psychiatry and brain science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43079032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"What We Know and Still Need to Know about Gender Aspects of Delusional Disorder: A Narrative Review of Recent Work","authors":"A. González-Rodríguez, M. Estève, A. Álvarez, A. Guàrdia, J. Monreal, D. Palao, J. Labad","doi":"10.20900/JPBS.20190009","DOIUrl":"https://doi.org/10.20900/JPBS.20190009","url":null,"abstract":"While gender differences in the psychopathology and clinical course of schizophrenia have been extensively reported, the potential for analogous differences in delusional disorder has been understudied. Our aim in this paper is to focus on the recent literature on delusional disorder and to explore gender aspects. This is a non-systematic, narrative and critical review. The review is divided into the following main sections: gender differences in epidemiology, symptomatology, phenotypic factor analyses, psychiatric comorbidity, response and adherence to medications, and clinical trajectories. Culture-bound delusional syndromes are also addressed, and potential causes for gender differences and their treatment are critically discussed. Although DMS-5 reports no gender differences in the frequency of delusional disorder or in delusional content, several studies have found erotomania to be more frequent in women. There seem also to be gender differences in affective and substance abuse comorbidity, which may prove clinically important. The loss of the neuroprotection conferred by estrogens during the reproductive period in women may trigger depressive symptoms after menopause. The interaction of age and gender has been insufficiently studied as is also the case for selective cultural pressures on men and women and their impact on the content of delusions. Studies designed to focus on gender differences in response to treatment are currently needed in delusional disorder","PeriodicalId":73912,"journal":{"name":"Journal of psychiatry and brain science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43152411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Vitamin D Levels Are Not Associated with Hippocampal-Dependent Learning in Young Adult Male C57BL/6J Mice: A Negative Report","authors":"K. Jaeschke, D. Blackmore, Natalie J. Groves, M. Al-Amin, S. Alexander, T. Burne","doi":"10.20900/jpbs.20190008","DOIUrl":"https://doi.org/10.20900/jpbs.20190008","url":null,"abstract":"It is well established that vitamin D is essential in calcium homeostasis and bone metabolism. Recent evidence has exposed further roles of vitamin D in adult brain function, specifically indicating that low vitamin D levels during adulthood may be related to cognitive impairment. We have recently shown that adult vitamin D (AVD) deficiency disrupts hippocampal-dependent learning and structural brain connectivity in BALB/c mice. The BALB/c mouse strain is more vulnerable to social stress compared with other resilient mouse strains, such as C57BL/6J mice. Therefore, the primary aim of this research was to examine C57BL/6J mice exposed to varying levels of vitamin D (0, 1500 and 15,000 IU/vitamin D3/kg referred to as deficient, control and elevated, respectively) for 10 weeks. The mice were assessed for hippocampal-dependent learning using the active place avoidance (APA) task. Mice were tested for behaviours that could alter performance on the APA task, and hippocampal tissue was analysed for catecholamine and protein expression. Vitamin D status did not affect spatial learning and memory, general behavioural domains, or catecholamine or protein expression in C57BL/6J mice. Overall, these results indicate that, in contrast to BALB/c mice, vitamin D status does not impact on hippocampal-dependent behaviour in young and healthy, adult male C57BL/6J mice","PeriodicalId":73912,"journal":{"name":"Journal of psychiatry and brain science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43744111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Effect of Cannabidiol on Psychosis-like Behaviour Induced by Methamphetamine and MK-801 in Mice: A Negative Report","authors":"E. Jaehne, M. Buuse","doi":"10.20900/JPBS.20190006","DOIUrl":"https://doi.org/10.20900/JPBS.20190006","url":null,"abstract":"Background: Cannabis is a widely used illicit substance but may also have medicinal properties. Cannabidiol (CBD), one of the main compounds of interest in the cannabis plant, has been suggested to have beneficial effects in various psychiatric disorders including anxiety and psychosis. Drug-induced locomotor hyperactivity is a commonly used animal model of psychosis-like behaviour and to show antipsychotic drug action. Several genetic and developmental animal models of psychosis show differences in locomotor hyperactivity. The aim of the present study was to investigate the effect of pretreatment with CBD on psychosis-like behaviour in mice. Methods: The animals underwent 5 sessions of locomotor activity testing each, with 3–4 days between tests to allow washout of acute drug challenge. Groups of mice (n = 8 male mice and n = 8 female mice combined) were pretreated with CBD (10 mg/kg) or its vehicle, followed 1 h later with either saline, the dopamine releaser, methamphetamine (1 or 3 mg/kg), or the NMDA receptor antagonist, MK-801 (0.1 or 0.25 mg/kg). Results: There was no significant effect of CBD on its own on locomotor activity. Pretreatment with CBD had no effect on the hyperlocomotion induced by either dose of methamphetamine. There was also no effect of CBD on MK-801 induced hyperlocomotion following the 0.25 mg/kg dose, while 0.1 mg/kg MK-801 did not induce hyperactivity. Conclusions: These results do not support an antipsychotic action of CBD","PeriodicalId":73912,"journal":{"name":"Journal of psychiatry and brain science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48413685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}