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Journal of Psychopharmacology

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https://www.readbyqxmd.com/read/28514890/spatial-recognition-test-a-novel-cognition-task-for-assessing-topographical-memory-in-mice
#1
Enes Havolli, Mark Dw Hill, Annie Godley, Pascal Jd Goetghebeur
Dysfunction in topographical memory is a core feature of several neurological disorders. There is a large unmet medical need to address learning and memory deficits as a whole in central nervous system disease. There are considerable efforts to identify pro-cognitive compounds but current methods are either lengthy or labour intensive. Our test used a two chamber apparatus and is based on the preference of rodents to explore novel environments. It was used firstly to assess topographical memory in mice at different retention intervals (RI) and secondly to investigate the effect of three drugs reported to be beneficial for cognitive decline associated with Alzheimer's disease, namely: donepezil, memantine and levetiracetam...
May 1, 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28462607/have-antipsychotics-a-different-speed-of-action-in-the-acute-treatment-of-mania-a-single-blind-comparative-study
#2
Massimiliano Buoli, Cecilia Maria Esposito, Marco Godio, Alice Caldiroli, Marta Serati, A Carlo Altamura
Available antipsychotics show different efficacy on manic symptoms of bipolar patients, but few studies have investigated the speed of action of the various compounds. For this reason, purpose of the present paper was to compare antipsychotic mono-therapies in terms of speed of action in a sample of manic bipolar patients. In total, 155 bipolar patients, treated with antipsychotic mono-therapy and followed-up in Inpatient Psychiatry Clinic of University of Milan, were included in this single-blind comparative study...
April 1, 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28441905/dopamine-dysregulation-in-the-prefrontal-cortex-relates-to-cognitive-deficits-in-the-sub-chronic-pcp-model-for-schizophrenia-a-preliminary-investigation
#3
Samantha L McLean, Michael K Harte, Joanna C Neill, Andrew Mj Young
RATIONALE: Dopamine dysregulation in the prefrontal cortex (PFC) plays an important role in cognitive dysfunction in schizophrenia. Sub-chronic phencyclidine (scPCP) treatment produces cognitive impairments in rodents and is a thoroughly validated animal model for cognitive deficits in schizophrenia. The aim of our study was to investigate the role of PFC dopamine in scPCP-induced deficits in a cognitive task of relevance to the disorder, novel object recognition (NOR). METHODS: Twelve adult female Lister Hooded rats received scPCP (2 mg/kg) or vehicle via the intraperitoneal route twice daily for 7 days, followed by 7 days washout...
April 1, 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28441901/patient-emergency-assessment-following-deliberate-self-poisoning-with-benzodiazepines-can-cognitive-markers-predict-recall-of-the-psychiatric-interview-a-pilot-study
#4
J Salles, J Pariente, C Dimeglio, P Gandia, B Lemesle, A Giron, N Franchitto, L Schmitt, E Very
STUDY HYPOTHESIS: In cases of deliberate self-poisoning (DSP), patients often ingest benzodiazepines (BZDs), known to alter memory. Experts recommend recovery of the patient's cognitive capacity before psychiatric assessment. Unfortunately, there is no validated tool in common practice to assess whether sufficient cognitive recovery has occurred after DSP with BZDs to ensure patient memory of the assessment. OBJECTIVE: The aim of the study was to identify cognitive functions and markers which predict preserved memory of the mental health care plan proposed at the emergency department after DSP...
April 1, 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28441896/dissecting-the-yale-brown-obsessive-compulsive-scale-severity-scale-to-understand-the-routes-for-symptomatic-improvement-in-obsessive-compulsive-disorder
#5
Daniel L da Conceição Costa, Veronica S Barbosa, Guaraci Requena, Roseli G Shavitt, Carlos A de Bragança Pereira, Juliana B Diniz
We aimed to investigate which items of the Yale-Brown Obsessive-Compulsive Severity Scale best discriminate the reduction in total scores in obsessive-compulsive disorder patients after 4 and 12 weeks of pharmacological treatment. Data from 112 obsessive-compulsive disorder patients who received fluoxetine (⩽80 mg/day) for 12 weeks were included. Improvement indices were built for each Yale-Brown Obsessive-Compulsive Severity Scale item at two timeframes: from baseline to week 4 and from baseline to week 12...
April 1, 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28441895/ketamine-s-dose-related-effects-on-anxiety-symptoms-in-patients-with-treatment-refractory-anxiety-disorders
#6
Paul Glue, Natalie J Medlicott, Sarah Harland, Shona Neehoff, Bridie Anderson-Fahey, Martin Le Nedelec, Andrew Gray, Neil McNaughton
The N-methyl-D-aspartate receptor antagonist ketamine has rapid onset activity in treatment-resistant depression, post-traumatic stress disorder and obsessive compulsive disorder. Due to similarities in brain network activity in depression and anxiety disorders, we hypothesized that ketamine might also be active in other refractory anxiety disorders. We evaluated the efficacy and safety of ketamine in 12 patients with refractory generalized anxiety disorder and/or social anxiety disorder who were not currently depressed, using an ascending single dose study design (0...
April 1, 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28441884/targeting-neuronal-dysfunction-in-schizophrenia-with-nicotine-evidence-from-neurophysiology-to-neuroimaging
#7
Jason Smucny, Jason R Tregellas
Patients with schizophrenia self-administer nicotine at rates higher than is self-administered for any other psychiatric illness. Although the reasons are unclear, one hypothesis suggests that nicotine is a form of 'self-medication' in order to restore normal levels of nicotinic signaling and target abnormalities in neuronal function associated with cognitive processes. This brief review discusses evidence from neurophysiological and neuroimaging studies in schizophrenia patients that nicotinic agonists may effectively target dysfunctional neuronal circuits in the illness...
April 1, 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28440729/2-arachidonoylglycerol-endocannabinoid-signaling-coupled-to-metabotropic-glutamate-receptor-type-5-modulates-anxiety-like-behavior-in-the-rat-ventromedial-prefrontal-cortex
#8
Ana F Almeida-Santos, Fabricio A Moreira, Francisco S Guimaraes, Daniele C Aguiar
2-Arachidonoylglycerol and anandamide are the main endocannabinoids, which act through cannabinoid type-1 and type-2 receptors. Among its many functions, anandamide modulates anxiety-like behaviors in the ventromedial prefrontal cortex. The role of 2-arachidonoylglycerol in this region, however, has remained unclear. Here, we verified whether intra- ventromedial prefrontal cortex injection of 2-arachidonoylglycerol or URB602, a monoacylglycerol lipase inhibitor (responsible for 2-arachidonoylglycerol hydrolysis), induce anxiolytic-like effects in Wistar rats...
April 1, 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28440105/effect-of-doxazosin-on-stress-reactivity-and-the-ability-to-resist-smoking
#9
Terril L Verplaetse, Andrea H Weinberger, Lindsay M Oberleitner, Kathryn Mz Smith, Brian P Pittman, Julia M Shi, Jeanette M Tetrault, Meaghan E Lavery, Marina R Picciotto, Sherry A McKee
Preclinical findings support a role for α1-adrenergic antagonists in reducing nicotine-motivated behaviors, but these findings have yet to be translated to humans. The current study evaluated whether doxazosin would attenuate stress-precipitated smoking in the human laboratory. Using a well-validated laboratory analogue of smoking-lapse behavior, this pilot study evaluated whether doxazosin (4 and 8 mg/day) versus placebo attenuated the effect of stress (vs neutral imagery) on tobacco craving, the ability to resist smoking and subsequent ad-libitum smoking in nicotine-deprived smokers ( n=35)...
April 1, 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28417684/toward-a-multiscale-modeling-framework-for-understanding-serotonergic-function
#10
KongFatt Wong-Lin, Da-Hui Wang, Ahmed A Moustafa, Jeremiah Y Cohen, Kae Nakamura
Despite its importance in regulating emotion and mental wellbeing, the complex structure and function of the serotonergic system present formidable challenges toward understanding its mechanisms. In this paper, we review studies investigating the interactions between serotonergic and related brain systems and their behavior at multiple scales, with a focus on biologically-based computational modeling. We first discuss serotonergic intracellular signaling and neuronal excitability, followed by neuronal circuit and systems levels...
April 1, 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28417664/low-dose-systemic-scopolamine-disrupts-context-conditioning-in-rats
#11
Laura Luyten, Shauni Nuyts, Tom Beckers
Cholinergic neurotransmission plays a key role in learning and memory. Prior research with rats indicated that a low dose of pre-training scopolamine (0.1 mg/kg), a cholinergic receptor antagonist, did not affect cued fear conditioning, but did block renewal when injected before extinguishing a conditioned tone, opening up opportunities to pharmacologically improve exposure therapy for anxiety patients. Before translating these findings to the clinic, it is important to carefully examine how scopolamine affects contextual fear memories...
April 1, 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28376679/dopamine-and-%C3%AE-opioid-receptor-dysregulation-in-the-brains-of-binge-eating-female-rats-possible-relevance-in-the-psychopathology-and-treatment-of-binge-eating-disorder
#12
David J Heal, Michelle Hallam, Michael Prow, Jane Gosden, Sharon Cheetham, Yong K Choi, Frank Tarazi, Peter Hutson
Adult, female rats given irregular, limited access to chocolate develop binge-eating behaviour with normal bodyweight and compulsive/perseverative and impulsive behaviours similar to those in binge-eating disorder. We investigated whether (a) dysregulated central nervous system dopaminergic and opioidergic systems are part of the psychopathology of binge-eating and (b) these neurotransmitter systems may mediate the actions of drugs ameliorating binge-eating disorder psychopathology. Binge-eating produced a 39% reduction of striatal D1 receptors with 22% and 23% reductions in medial and lateral caudate putamen and a 22% increase of striatal μ-opioid receptors...
April 1, 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28440103/british-association-for-psychopharmacology-consensus-guidance-on-the-use-of-psychotropic-medication-preconception-in-pregnancy-and-postpartum-2017
#13
R Hamish McAllister-Williams, David S Baldwin, Roch Cantwell, Abby Easter, Eilish Gilvarry, Vivette Glover, Lucian Green, Alain Gregoire, Louise M Howard, Ian Jones, Hind Khalifeh, Anne Lingford-Hughes, Elizabeth McDonald, Nadia Micali, Carmine M Pariante, Lesley Peters, Ann Roberts, Natalie C Smith, David Taylor, Angelika Wieck, Laura M Yates, Allan H Young
Decisions about the use of psychotropic medication in pregnancy are an ongoing challenge for clinicians and women with mental health problems, owing to the uncertainties around risks of the illness itself to mother and fetus/infant, effectiveness of medications in pregnancy and risks to the fetus/infant from in utero exposure or via breast milk. These consensus guidelines aim to provide pragmatic advice regarding these issues. They are divided into sections on risks of untreated illness in pregnancy; general principles of using drugs in the perinatal period; benefits and harms associated with individual drugs; and recommendations for the management of specific disorders...
March 1, 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28440102/smoking-addiction-the-shift-from-head-to-hands-approach-bias-towards-smoking-related-cues-in-low-dependent-versus-dependent-smokers
#14
Sandrine Detandt, Ariane Bazan, Etienne Quertemont, Paul Verbanck
The dual process theory is central to several models of addiction, implying both an increase of stimulus salience and deficits in inhibitory control. Our major aim is to provide behavioral evidence for an approach bias tendency in smokers and more specifically during smoking cue exposure. The second aim is to examine whether this bias differs in low-dependent versus dependent smokers. Thirty-two smokers (17 low dependent and 15 dependent; cut-off FTND of 4) and 28 non-smokers performed a modified Go/NoGo task using tobacco-related words and neutral words as stimuli...
March 1, 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28376309/dietary-modulation-of-cortical-excitation-and-inhibition
#15
Anika K Smith, Alex R Wade, Kirsty Eh Penkman, Daniel H Baker
The balance of excitatory and inhibitory neurotransmitters in the brain affects both neural responses and behaviour in humans and animals. Here we investigated whether dietary intervention aimed at increasing levels of the inhibitory neurotransmitter gamma-aminobutyric acid (GABA) can influence neural responses to basic sensory stimuli. Using a steady-state electroencephalography (EEG) paradigm, we found that the neural response to visual patterns was reduced in individuals who consumed a yeast extract product rich in substances associated with the production of GABA (glutamate and B vitamins), but not in a control group who consumed a placebo substance ( n = 14 per group)...
March 1, 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28372506/substitution-of-medical-cannabis-for-pharmaceutical-agents-for-pain-anxiety-and-sleep
#16
Brian J Piper, Rebecca M DeKeuster, Monica L Beals, Catherine M Cobb, Corey A Burchman, Leah Perkinson, Shayne T Lynn, Stephanie D Nichols, Alexander T Abess
A prior epidemiological study identified a reduction in opioid overdose deaths in US states that legalized medical cannabis (MC). One theory to explain this phenomenon is a potential substitution effect of MC for opioids. This study evaluated whether this substitution effect of MC for opioids also applies to other psychoactive medications. New England dispensary members ( n = 1,513) completed an online survey about their medical history and MC experiences. Among respondents that regularly used opioids, over three-quarters (76...
March 1, 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28351203/effects-of-varenicline-on-alcohol-self-administration-and-craving-in-drinkers-with-depressive-symptoms
#17
Walter Roberts, Terril L Verplaetse, Kelly Moore, Lindsay Oberleitner, Marina R Picciotto, Sherry A McKee
Varenicline (VAR) is approved to aid in smoking cessation and has been shown to be effective for reducing alcohol consumption in heavy drinkers. Little is known, however, about treatment moderators that may influence efficacy. The current study reanalyzed data from a human laboratory study (Verplaetse et al., 2016) to determine whether VAR was more effective at reducing alcohol use among drinkers reporting symptoms of depression. Participants were 60 adults meeting DSM-IV criteria for alcohol use disorders ( n = 60) who were randomly assigned to receive VAR (1 mg/day, 2 mg/day) or placebo...
March 1, 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28351201/does-a-single-session-of-electroconvulsive-therapy-alter-the-neural-response-to-emotional-faces-in-depression-a-randomised-sham-controlled-functional-magnetic-resonance-imaging-study
#18
Kamilla W Miskowiak, Lars V Kessing, Caroline V Ott, Julian Macoveanu, Catherine J Harmer, Anders Jørgensen, Rasmus Revsbech, Hans M Jensen, Olaf B Paulson, Hartwig R Siebner, Martin B Jørgensen
Negative neurocognitive bias is a core feature of major depressive disorder that is reversed by pharmacological and psychological treatments. This double-blind functional magnetic resonance imaging study investigated for the first time whether electroconvulsive therapy modulates negative neurocognitive bias in major depressive disorder. Patients with major depressive disorder were randomised to one active ( n=15) or sham electroconvulsive therapy ( n=12). The following day they underwent whole-brain functional magnetic resonance imaging at 3T while viewing emotional faces and performed facial expression recognition and dot-probe tasks...
March 1, 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28460603/prevalence-and-patterns-of-antidepressant-switching-amongst-primary-care-patients-in-the-uk
#19
Becky Mars, Jon Heron, David Gunnell, Richard M Martin, Kyla H Thomas, David Kessler
OBJECTIVE: Non-response to antidepressant treatment is a substantial problem in primary care, and many patients with depression require additional second-line treatments. This study aimed to examine the prevalence and patterns of antidepressant switching in the UK, and identify associated demographic and clinical factors. METHOD: Cohort analysis of antidepressant prescribing data from the Clinical Practice Research Datalink, a large, anonymised UK primary care database...
May 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28372526/adjunctive-metformin-for-antipsychotic-related-hyperprolactinemia-a-meta-analysis-of-randomized-controlled-trials
#20
Wei Zheng, Xin-Hu Yang, Dong-Bin Cai, Gabor S Ungvari, Chee H Ng, Nan Wang, Yu-Ping Ning, Yu-Tao Xiang
Hyperprolactinemia is a common and severe antipsychotic-induced adverse drug reaction. This meta-analysis of randomized controlled trials systematically examined the efficacy and safety of adjunctive metformin for antipsychotic-related hyperprolactinemia in schizophrenia patients. Two independent investigators searched, extracted, and synthesized data. Weighted mean differences and risk ratios with their 95% confidence intervals were calculated using random effect model. Four randomized controlled trials ( n=509) comparing adjunctive metformin ( n=253) with the control groups ( n=256), lasting 22...
May 2017: Journal of Psychopharmacology
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