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Schizophrenia Research

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https://www.readbyqxmd.com/read/28434719/pituitary-volume-reduction-in-schizophrenia-following-cognitive-behavioural-therapy
#1
Preethi Premkumar, Danielle Bream, Adegboyega Sapara, Dominic Fannon, Anantha P Anilkumar, Elizabeth Kuipers, Veena Kumari
Cognitive behavioural therapy (CBT) for psychosis (CBTp) aims to lower the stress of psychotic symptoms. Given that the pituitary is involved in stress regulation, CBT-led stress reduction may be accompanied by a change in pituitary volume. This study aimed to determine whether CBTp reduces pituitary volume in schizophrenia. The relation between pre-therapy memory and CBTp-led pituitary volume change was also examined given that poor memory relates to a blunted cortisol awakening response, denoting impaired stress response, in schizophrenia...
April 20, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28433501/disrupted-in-schizophrenia-1-regulates-the-processing-of-reelin-in-the-perinatal-cortex
#2
Nicholas J Bradshaw, Svenja V Trossbach, Sabrina Köber, Susanne Walter, Ingrid Prikulis, Sascha Weggen, Carsten Korth
Disrupted in Schizophrenia 1 (DISC1) is a prominent gene in mental illness research, encoding a scaffold protein known to be of importance in the developing cerebral cortex. Reelin is a critical extracellular protein for development and lamination of the prenatal cortex and which has also been independently implicated in mental illness. Regulation of reelin activity occurs through processing by the metalloproteinases ADAMTS-4 and ADAMTS-5. Through cross-breeding of heterozygous transgenic DISC1 mice with heterozygous reeler mice, which have reduced reelin, pups heterozygous for both phenotypes were generated...
April 19, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28433500/psychometric-characteristics-of-the-matrics-consensus-cognitive-battery-in-a-large-pooled-cohort-of-stable-schizophrenia-patients
#3
Anastasia Georgiades, Vicki G Davis, Alexandra S Atkins, Anzalee Khan, Trina W Walker, Antony Loebel, George Haig, Dana C Hilt, Eduardo Dunayevich, Daniel Umbricht, Michael Sand, Richard S E Keefe
The MATRICS Consensus Cognitive Battery (MCCB) was developed to assess cognitive treatment effects in schizophrenia clinical trials, and is considered the FDA gold standard outcome measure for that purpose. The aim of the present study was to establish pre-treatment psychometric characteristics of the MCCB in a large pooled sample. The dataset included 2616 stable schizophrenia patients enrolled in 15 different clinical trials between 2007 and 2016 within the United States (94%) and Canada (6%). The MCCB was administered twice prior to the initiation of treatment in 1908 patients...
April 19, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28433499/changes-in-the-expression-of-metabotropic-glutamate-receptor-5-mglur5-in-a-ketamine-based-animal-model-of-schizophrenia
#4
Dariusz Zurawek, Anna Salerno-Kochan, Marta Dziedzicka-Wasylewska, Agnieszka Nikiforuk, Tomasz Kos, Piotr Popik
It has been shown that the metabotropic glutamate receptor subtype 5 (mGluR5) is functionally associated with the NMDA subtype of the glutamate receptor family (NMDA receptors). These two receptors colocalize in brain regions associated with schizophrenia. Although the role of the NMDA receptor in cognitive and negative symptoms of schizophrenia is well studied, information about the role of mGluR5 receptors in schizophrenia is sparse. In our work, we show that subchronic administration of ketamine, a well-studied, non-competitive antagonist of NMDA receptors, caused cognitive deficits in rats as shown by testing novel object recognition (NOR)...
April 19, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28433498/long-term-effectiveness-of-aripiprazole-once-monthly-for-schizophrenia-is-maintained-in-the-qualify-extension-study
#5
Dieter Naber, Ross A Baker, Anna Eramo, Carlos Forray, Karina Hansen, Christophe Sapin, Timothy Peters-Strickland, Anna-Greta Nylander, Peter Hertel, Simon Nitschky Schmidt, Jean-Yves Loze, Steven G Potkin
OBJECTIVE: To evaluate long-term safety and effectiveness of continued treatment with aripiprazole once-monthly 400mg (AOM 400) in patients with schizophrenia. METHODS: Patients who completed the QUALIFY study (NCT01795547) in the AOM 400 arm were eligible for 6 additional once-monthly injections of AOM 400 during an open-label, 24-week extension (NCT01959035). Safety data were collected at each visit. Effectiveness measures included change from baseline in health-related qualify of life and functioning on the Heinrichs-Carpenter Quality of Life scale (QLS) and Clinical Global Impression - Severity (CGI-S) scale...
April 19, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28431800/genetic-predictors-of-antipsychotic-response-to-lurasidone-identified-in-a-genome-wide-association-study-and-by-schizophrenia-risk-genes
#6
Jiang Li, Akane Yoshikawa, Mark D Brennan, Timothy L Ramsey, Herbert Y Meltzer
Biomarkers which predict response to atypical antipsychotic drugs (AAPDs) increases their benefit/risk ratio. We sought to identify common variants in genes which predict response to lurasidone, an AAPD, by associating genome-wide association study (GWAS) data and changes (Δ) in Positive And Negative Syndrome Scale (PANSS) scores from two 6-week randomized, placebo-controlled trials of lurasidone in schizophrenia (SCZ) patients. We also included SCZ risk SNPs identified by the Psychiatric Genomics Consortium using a polygenic risk analysis...
April 18, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28427930/the-relative-prevalence-of-schizophrenia-among-cannabis-and-cocaine-users-attending-addiction-services
#7
Nicolás Libuy, Valeria de Angel, Carlos Ibáñez, Robin M Murray, Adrian P Mundt
BACKGROUND: Cannabis and cocaine are the most common illicit drugs for which people are treated in addiction services in Latin America. Much research has suggested that the use of cannabis increases the risk of schizophrenia; there is less evidence concerning cocaine. The aim of the present study was to establish the relative prevalence of schizophrenia in people treated for cannabis use and cocaine use disorders in Chile. METHODS: A sample of 22,615 people treated for illicit drug use disorders was obtained from a national registry of addiction service users in Chile...
April 18, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28427931/issues-affecting-reliable-and-valid-assessment-of-early-life-stressors-in-psychosis
#8
LETTER
Teresa Vargas, Vijay Mittal
No abstract text is available yet for this article.
April 17, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28427929/corrigendum-to-long-term-cariprazine-treatment-for-the-prevention-of-relapse-in-patients-with-schizophrenia-a-randomized-double-blind-placebo-controlled-trial-schizophr-res-176-2016-264-271
#9
Suresh Durgam, Willie Earley, Rui Li, Dayong Li, Kaifeng Lu, István Laszlovszky, W Wolfgang Fleischhacker, Henry A Nasrallah
No abstract text is available yet for this article.
April 17, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28416205/the-link-between-schizophrenia-and-substance-use-disorder-a-unifying-hypothesis
#10
REVIEW
Jibran Y Khokhar, Lucas L Dwiel, Angela M Henricks, Wilder T Doucette, Alan I Green
Substance use disorders occur commonly in patients with schizophrenia and dramatically worsen their overall clinical course. While the exact mechanisms contributing to substance use in schizophrenia are not known, a number of theories have been put forward to explain the basis of the co-occurrence of these disorders. We propose here a unifying hypothesis that combines recent evidence from epidemiological and genetic association studies with brain imaging and pre-clinical studies to provide an updated formulation regarding the basis of substance use in patients with schizophrenia...
April 14, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28416094/the-effect-of-tdcs-on-auditory-hallucination-and-p50-sensory-gating-in-patients-with-schizophrenia-a-pilot-study
#11
LETTER
Minah Kim, Youngwoo Bryan Yoon, Tak Hyung Lee, Tae Young Lee, Jun Soo Kwon
No abstract text is available yet for this article.
April 14, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28416095/self-and-other-agency-in-people-with-passivity-first-rank-symptoms-in-schizophrenia
#12
Kyran T Graham-Schmidt, Mathew T Martin-Iverson, Flavie A V Waters
Individuals with passivity (first-rank) symptoms report that their actions, thoughts and sensations are influenced or controlled by an external (non-self) agent. Passivity symptoms are closely linked to schizophrenia and related disorders yet they remain poorly understood. One dominant framework posits a role for deficits in the sense of agency. An important question is whether deficits in self-agency can be differentiated from other-agency in schizophrenia and passivity symptoms. This study aimed to evaluate self- and other-agency in 51 people with schizophrenia (n=20 current, 10 past, 21 no history of passivity symptoms), and 48 healthy controls...
April 13, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28416093/the-role-of-cognitive-functioning-in-the-relationship-between-childhood-trauma-and-a-mixed-phenotype-of-affective-anxious-psychotic-symptoms-in-psychotic-disorders
#13
Giovanni Mansueto, Martine van Nierop, Koen Schruers, Berhooz Z Alizadeh, Agna A Bartels-Velthuis, Nico J van Beveren, Richard Bruggeman, Wiepke Cahn, Lieuwe de Haan, Philippe Delespaul, Carin J Meijer, Inez Myin-Germeys, Rene S Kahn, Frederike Schirmbeck, Claudia J P Simons, Neeltje E M van Haren, Jim van Os, Ruud van Winkel
Cognitive impairments in patients with psychotic disorder have been associated with poor functioning and increased symptom severity. Furthermore, childhood trauma (CT) exposure has been associated with worse cognitive functioning as well as co-occurrence of affective-anxious-psychosis symptoms or a 'mixed phenotype of psychopathology' (MP), which in turn is associated with greater symptom severity, and poor functioning. This study aims to evaluate if cognition could be associated with CT/MP. 532 patients with non-affective psychotic patients were assessed on CT, symptom profile, cognition, functioning, and symptom severity at baseline and 3 and 6-year follow-up...
April 13, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28416092/cytokines-and-c-reactive-protein-alterations-with-respect-to-cognitive-impairment-in-schizophrenia-and-bipolar-disorder-a-systematic-review
#14
REVIEW
Błażej Misiak, Bartłomiej Stańczykiewicz, Kamila Kotowicz, Janusz K Rybakowski, Jerzy Samochowiec, Dorota Frydecka
BACKGROUND: The aim of this article was to perform a systematic review of studies investigating the association between peripheral levels of cytokines and C-reactive protein (CRP), cytokine gene polymorphisms and cognition in patients with schizophrenia and bipolar disorder (BD). METHODS: The following databases: PubMed, CINAHL Complete, Academic Search Complete, ERIC and Health Source: Nursing/Academic Edition databases were searched according to the PRISMA guidelines...
April 13, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28412089/inverse-association-between-negative-symptoms-and-body-mass-index-in-chronic-schizophrenia
#15
G Mezquida, G Savulich, C Garcia-Rizo, M P Garcia-Portilla, A Toll, L Garcia-Alvarez, J Bobes, A Mané, M Bernardo, E Fernandez-Egea
BACKGROUND: We investigated whether negative symptoms, such as poor motivation or anhedonia, were associated with higher body mass index (BMI) in stable patients with schizophrenia chronically treated with antipsychotic medication. METHODS: 62 olanzapine- or clozapine-treated patients with illness duration of at least four years were selected from an international multicenter study on the characterization of negative symptoms. All participants completed the Brief Negative Symptom Scale (BNSS) and the Positive and Negative Syndrome Scale (PANSS)...
April 12, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28412088/tobacco-smoking-and-its-association-with-cognition-in-first-episode-psychosis-patients
#16
Lauren M Hickling, Rocio Perez-Iglesias, Victor Ortiz-García de la Foz, Vincent Balanzá-Martínez, Philip McGuire, Benedicto Crespo-Facorro, Rosa Ayesa-Arriola
Available evidence suggests that nicotine may enhance cognitive functioning. Moreover, it has been suggested that the high prevalence of smoking in people with schizophrenia is in part due to self-medication behaviour to alleviate cognitive deficits. We assessed the association between tobacco smoking and cognitive functioning in a large population of first episode psychosis (FEP) patients (n=304) and healthy controls (n=156). Smokers were not tobacco deprived, or were minimally deprived (≤2h). Verbal memory, visual memory, working memory, processing speed, executive function, motor dexterity and attention were assessed...
April 12, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28400070/decomposing-p300-into-correlates-of-genetic-risk-and-current-symptoms-in-schizophrenia-an-inter-trial-variability-analysis
#17
Minah Kim, Tak Hyung Lee, Ji-Hun Kim, Hanwoom Hong, Tae Young Lee, Youngjo Lee, Dean F Salisbury, Jun Soo Kwon
BACKGROUND: The P300 event-related potential (ERP) component, which reflects cognitive processing, is a candidate biomarker for schizophrenia. However, the role of P300 in the pathophysiology of schizophrenia remains unclear because averaged P300 amplitudes reflect both genetic predisposition and current clinical status. Thus, we sought to identify which aspects of P300 are associated with genetic risk versus symptomatic status via an inter-trial variability analysis. METHODS: Auditory P300, clinical symptoms, and neurocognitive function assessments were obtained from forty-five patients with schizophrenia, thirty-two subjects at genetic high risk (GHR), thirty-two subjects at clinical high risk (CHR), and fifty-two healthy control (HC) participants...
April 8, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28395940/abstract-and-experiential-thinking-differentially-account-for-anomalous-perception-of-reality-in-people-with-or-without-schizophrenia
#18
J J Ricarte, F Del Rey, L Ros, J M Latorre, F Berna
repetitive thinking is often increased in various psychopathological conditions. However, evidence for its possible contribution to psychotic symptoms relies only on correlational analysis and has not been experimentally tested within the psychotic continuum. This research aims to examine whether repetitive thinking about a negative past experience using concrete versus abstract processing might modify the reporting of anomalous sensory experiences. 89 patients with schizophrenia and 89 matched controls were asked to reflect on their most negative Self-Defining Memory during a thirty-minute period...
April 7, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28392210/disordered-gambling-and-psychosis-prevalence-and-clinical-correlates
#19
LETTER
B D Cassetta, H S Kim, D C Hodgins, D S McGrath, L M Tomfohr-Madsen, H Tavares
No abstract text is available yet for this article.
April 6, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28392209/verbal-working-memory-in-schizophrenia-the-role-of-syntax-in-facilitating-serial-recall
#20
Adrienne W Y Li, Nestor Viñas-Guasch, Christy L M Hui, Wing-Chung Chang, Sherry K W Chan, Edwin H M Lee, Eric Y H Chen
BACKGROUND: Deficits in verbal working memory (VWM) have consistently been observed in schizophrenia, ranging from impairments in capacity, encoding, to irregular semantic organisation. However, syntactic deficits are less well-characterised, despite its crucial role in language construction. This study examines the role of simple syntactic structure (basis of the "sentence superiority effect") in VWM of patients with psychotic disorders. METHODS: Patients with schizophrenia-spectrum disorders (n=40) and healthy controls matched on age, sex and education (n=40) were administered an auditory serial recall task containing word lists with low semantic coherence and either syntactically familiar structure (noun-verb-noun sequence) or syntactically unfamiliar structure...
April 6, 2017: Schizophrenia Research
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