Sex-specific spatial memory deficits in mice with a conditional TrkB deletion on parvalbumin interneurons.

Sex-specific spatial memory deficits in mice with a conditional TrkB deletion on parvalbumin interneurons. Behav Brain Res. 2019 May 28;:111984 Authors: Grech AM, Du X, Murray SS, Xiao J, Hill RA Abstract Schizophrenia is a debilitating disorder characterised by three main symptom categories: positive, negative and cognitive. Cognitive symptoms emerge first, and currently do not have appropriate treatments, despite being a strong predictor of the severity and progress of the illness. Cognitive deficits are strongly associated with the dysfunction of GABAergic parvalbumin interneurons (PV-IN). PV-IN are supported by Brain-Derived Neurotrophic Factor (BDNF) via its receptor Tropomyosin-related Kinase B (TrkB). The main aim of this study was to investigate the cognitive and affective consequences of disrupted BDNF-TrkB signalling at PV-IN. We crossed PV-Cre mice with heterozygous TrkB floxed mice (PV-Cre:Fl+/-) to knock-down TrkB receptors on PV-IN. Male and female mice underwent a battery of tests including: Y-Maze, Cheeseboard Maze, Elevated Plus Maze, and Locomotor activity. Co-expression of PV and TrkB in the hippocampus was assessed by fluorescent immunohistochemistry and detailed stereology. Sex-specific spatial memory impairments were found in the Y-Maze. Only male PV-Cre:Fl+/- mice showed no preference for the novel arm. Furthermore, there was a male specific genotype difference in memory retrieval in the Cheeseboard Maze. Male PV-Cre:Fl+/- mice wer...
Source: Behavioural Brain Research - Category: Neurology Authors: Tags: Behav Brain Res Source Type: research

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This study describes the prevalence of nonmedical methadone use in a community sample of PWID and examines factors associated with recent use of nonmedical methadone. Methods: A cross-sectional sample of PWID (N = 777) was recruited using targeted sampling and interviewed in California (2011-2013). Descriptive, bivariate, and multivariate logistic regression analyses were used to determine characteristics associated with nonmedical methadone use in the last 30 days. To determine if nonmedical methadone use was associated with overdose in the last 6 months, a separate multivariate analysis was conducted...
Source: Substance Use and Misuse - Category: Addiction Tags: Subst Use Misuse Source Type: research
The once-daily transdermal patch provides sustained concentrations of asenapine over 24 hours and is approved for patients with schizophrenia aged 18 and older.FDA Approvals
Source: Medscape Medical News Headlines - Category: Consumer Health News Tags: Psychiatry News Alert Source Type: news
Conditions:   Bipolar I Disorder;   Schizophrenia Intervention:   Drug: Iloperidone Sponsor:   Vanda Pharmaceuticals Recruiting
Source: ClinicalTrials.gov - Category: Research Source Type: clinical trials
Publication date: Available online 13 October 2019Source: Seminars in Cancer BiologyAuthor(s): Vikram Shaw, Suyash Srivastava, Sanjay K. SrivastavaAbstractThe recent development of high throughput compound screening has allowed drug repurposing to emerge as an effective avenue for discovering novel treatments for cancer. FDA-approved antipsychotic drugs fluspirilene, penfluridol, and pimozide are clinically used for the treatment of psychotic disorders, primarily schizophrenia. These compounds, belong to diphenylbutylpiperidine class of antipsychotic drugs, are the potent inhibitors of dopamine D2 receptor and calcium chan...
Source: Seminars in Cancer Biology - Category: Cancer & Oncology Source Type: research
AbstractTo investigate the effectiveness of the Clubhouse Model of Psychosocial Rehabilitation on psychosocial functions and recovery of native Chinese individuals with schizophrenia in a community sample. A randomized controlled design was used. A total of 56 participants were recruited from a community sample for a study lasting 6  months, but five participants dropped out. Twenty-eight participants attended the Clubhouse program, and twenty-three participants served as controls. Standardized assessments were performed on three areas at the baseline and the 6-month follow-up: 1. symptom reduction; 2. social function...
Source: Administration and Policy in Mental Health and Mental Health Services Research - Category: Psychiatry Source Type: research
Did the movie Joker portray mental illness correctly and does it matter? We passionately go over the movie Joker from the lense of people living with mental illness and discuss whether or not there are implications of making a movie like this. Does it help us or hurt us? What if it does both? Listen in to hear Gabe’s freakishly good recollection of scenes from the movie as Jackie struggles to separate entertainment from reality.  Spoiler Alert: You don’t need to see Joker to appreciate this conversation but we do go over the plot and reveal some important scenes from the movie. (Transcript Available Below)...
Source: World of Psychology - Category: Psychiatry & Psychology Authors: Tags: A Bipolar, A Schizophrenic, and a Podcast Antidepressant Antipsychotic Depression Minding the Media Not Crazy Podcast Source Type: blogs
Journal of Personality Disorders, Ahead of Print.
Source: Journal of Personality Disorders - Category: Psychiatry Authors: Source Type: research
AbstractCognitive deficits are a core feature of serious mental illnesses such as major depression, bipolar disorder and schizophrenia and are a common cause of functional disability. However, the efficacy of pharmacological interventions for improving the cognitive deficits in these disorders is limited. As pro-cognitive pharmacological treatments are lacking, we aimed to review whether thyroid hormones or drugs that target prolactin may become potential candidates for ‘repurposing’ trials aiming to improve cognition. We conducted a narrative review focused on thyroid hormones and prolactin as potential target...
Source: Clinical Drug Investigation - Category: Drugs & Pharmacology Source Type: research
AbstractIn humans, variations in the polysialic acid ‐producing enzyme ST8SIA2 and disturbances in the cortical inhibitory system are associated with neurodevelopmental psychiatric disorderssuch as schizophrenia and autism. In mice, the ST8SIA2‐dependent formation of polysialic acid during embryonic development is crucial for the establishment of interneuron populations of the medial prefrontal cortex (mPFC). However, the spatial pattern and the neurodevelopmental mechanisms of interneuron changes caused by loss of ST8SIA2 functionhave not been fully characterized. Here, we use immunohistochemical analysis to demonstra...
Source: Journal of Neurochemistry - Category: Neuroscience Authors: Tags: Original Article Source Type: research
Abstract Disordered gambling (DG) is a rare but serious condition that results in considerable financial and interpersonal harms. Twin studies indicate that DG is heritable but are silent with respect to specific genes or pathways involved. Existing genomewide association studies (GWAS) of DG have been substantially underpowered. Larger GWAS of other psychiatric disorders now permit calculation of polygenic risk scores (PRSs) that reflect the aggregated effects of common genetic variants contributing risk for the target condition. The current study investigated whether gambling and DG are associated with PRSs for fo...
Source: Twin Research and Human Genetics - Category: Genetics & Stem Cells Authors: Tags: Twin Res Hum Genet Source Type: research
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