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Schizophrenia and sleep

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https://www.readbyqxmd.com/read/29138607/evaluation-of-sleep-profile-in-schizophrenia-patients-treated-with-extended-release-paliperidone-an-open-label-prospective-study-in-southeast-asia
#1
Ronnachai Kongsakon, Nuntika Thavichachart, Ka Fai Chung, Leslie Lim, Beverly Azucena, Elizabeth Rondain, Benson Go, Fe Costales, Osot Nerapusee
Objective: To evaluate the effect of 6 months of treatment with paliperidone extended-release (ER) tablets on the sleep profile of patients with schizophrenia. Methods: A total of 984 patients meeting the The Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV) criteria for schizophrenia who switched their antipsychotic to paliperidone ER were recruited from 61 sites in five countries in Southeast Asia. We recorded patient demographics and assessed sleep quality and daytime drowsiness using visual analog scales...
2017: Psychology Research and Behavior Management
https://www.readbyqxmd.com/read/29136236/basic-neuroscience-illuminates-causal-relationship-between-sleep-and-memory-translating-to-schizophrenia
#2
Ana Pocivavsek, Laura M Rowland
Patients with schizophrenia are often plagued by sleep disturbances that can exacerbate the illness, including potentiating psychosis and cognitive impairments. Cognitive dysfunction is a core feature of schizophrenia with learning and memory being particularly impaired. Sleep disruptions often accompanying the illness and may be key mechanism that contribute to these core dysfunctions. In this special translational neuroscience feature, we highlight the role of sleep in mediating cognitive function, with a special focus on learning and memory...
November 9, 2017: Schizophrenia Bulletin
https://www.readbyqxmd.com/read/29046890/a-comparison-of-passive-and-active-estimates-of-sleep-in-a-cohort-with-schizophrenia
#3
Patrick Staples, John Torous, Ian Barnett, Kenzie Carlson, Luis Sandoval, Matcheri Keshavan, Jukka-Pekka Onnela
Sleep abnormalities are considered an important feature of schizophrenia, yet convenient and reliable sleep monitoring remains a challenge. Smartphones offer a novel solution to capture both self-reported and objective measures of sleep in schizophrenia. In this three-month observational study, 17 subjects with a diagnosis of schizophrenia currently in treatment downloaded Beiwe, a platform for digital phenotyping, on their personal Apple or Android smartphones. Subjects were given tri-weekly ecological momentary assessments (EMAs) on their own smartphones, and passive data including accelerometer, GPS, screen use, and anonymized call and text message logs was continuously collected...
2017: NPJ Schizophrenia
https://www.readbyqxmd.com/read/29038553/a-comparison-of-passive-and-active-estimates-of-sleep-in-a-cohort-with-schizophrenia
#4
Patrick Staples, John Torous, Ian Barnett, Kenzie Carlson, Luis Sandoval, Matcheri Keshavan, Jukka-Pekka Onnela
Sleep abnormalities are considered an important feature of schizophrenia, yet convenient and reliable sleep monitoring remains a challenge. Smartphones offer a novel solution to capture both self-reported and objective measures of sleep in schizophrenia. In this three-month observational study, 17 subjects with a diagnosis of schizophrenia currently in treatment downloaded Beiwe, a platform for digital phenotyping, on their personal Apple or Android smartphones. Subjects were given tri-weekly ecological momentary assessments (EMAs) on their own smartphones, and passive data including accelerometer, GPS, screen use, and anonymized call and text message logs was continuously collected...
October 16, 2017: NPJ Schizophrenia
https://www.readbyqxmd.com/read/29033618/schizophrenia-and-sleep-disorders-links-risks-and-management-challenges
#5
REVIEW
Rachel E Kaskie, Bianca Graziano, Fabio Ferrarelli
Schizophrenia is a major psychiatric disorder that has a massive, long-lasting negative impact on the patients as well as society. While positive symptoms (i.e., delusions and hallucinations), negative symptoms (i.e., anhedonia, social withdrawal), and cognitive impairments are traditionally considered the most prominent features of this disorder, the role of sleep and sleep disturbances has gained increasing prominence in clinical practice. Indeed, the vast majority of patients with schizophrenia report sleep abnormalities, which tend to precede illness onset and can predict an acute exacerbation of psychotic symptoms...
2017: Nature and Science of Sleep
https://www.readbyqxmd.com/read/29032150/functional-analysis-of-schizophrenia-genes-using-geneanalytics-program-and-integrated-databases
#6
Tharani Sundararajan, Ann M Manzardo, Merlin G Butler
Schizophrenia (SCZ) is a chronic debilitating neuropsychiatric disorder with multiple risk factors involving numerous complex genetic influences. We examined and updated a master list of clinically relevant and susceptibility genes associated with SCZ reported in the literature and genomic databases dedicated to gene discovery for characterization of SCZ genes. We used the commercially available GeneAnalytics computer-based gene analysis program and integrated genomic databases to create a molecular profile of the updated list of 608 SCZ genes to model their impact in select categories (tissues and cells, diseases, pathways, biological processes, molecular functions, phenotypes and compounds) using specialized GeneAnalytics algorithms...
October 12, 2017: Gene
https://www.readbyqxmd.com/read/29031741/further-evidences-for-sleep-instability-and-impaired-spindle-delta-dynamics-in-schizophrenia-a-whole-night-polysomnography-study-with-neuroloop-gain-and-sleep-cycle-analysis
#7
Arun Sasidharan, Sunil Kumar, Ajay Kumar Nair, Ammu Lukose, Vrinda Marigowda, John P John, Bindu M Kutty
OBJECTIVE: Sleep offers a unique window into the brain dysfunctions in schizophrenia. Many past sleep studies have reported abnormalities in both macro-sleep architecture (like increased awakenings) as well as micro-sleep-architecture (like spindle deficits) in patients with schizophrenia (PSZ). The present study attempts to replicate previous reports of macro- and micro-sleep-architectural abnormalities in schizophrenia. In addition, the study also examined sleep-stage changes and spindle-delta dynamics across sleep-cycles to provide further evidence in support of the dysfunctional thalamocortical mechanisms causing sleep instability and poor sleep maintenance associated with schizophrenia pathophysiology...
October 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28991183/orexin-receptor-multimerization-versus-functional-interactions-neuropharmacological-implications-for-opioid-and-cannabinoid-signalling-and-pharmacogenetics
#8
Miles D Thompson, Takeshi Sakurai, Innocenzo Rainero, Mary C Maj, Jyrki P Kukkonen
Orexins/hypocretins are neuropeptides formed by proteolytic cleavage of a precursor peptide, which are produced by neurons found in the lateral hypothalamus. The G protein-coupled receptors (GPCRs) for these ligands, the OX₁ and OX₂ orexin receptors, are more widely expressed throughout the central nervous system. The orexin/hypocretin system has been implicated in many pathways, and its dysregulation is under investigation in a number of diseases. Disorders in which orexinergic mechanisms are being investigated include narcolepsy, idiopathic sleep disorders, cluster headache and migraine...
October 8, 2017: Pharmaceuticals
https://www.readbyqxmd.com/read/28953789/benzodiazepines-as-adjunctive-therapy-in-treatment-refractory-symptoms-of-schizophrenia
#9
Joanna Szarmach, Adam Włodarczyk, Wiesław Jerzy Cubała, Mariusz Stanisław Wiglusz
Antipsychotics are a key intervention strategy in pharmacotherapy in schizophrenia. However, the benzodiazepines are often prescribed to control sleep disturbances, anxiety or hostile behaviour. There is some evidence supporting the combination therapy with antipsychotics and benzodiazepines providing beneficiary treatment effect to the psychosis in positive and negative symptom domains as well as catatonia or adverse reactions to antipsychotic drugs. In particular, in a population suffering from residual symptoms of schizophrenia, in particular anxiety, emotional flattening, being refractory to approved treatment strategies, benzodiazepines as add-on to antipsychotics seem to be an option...
September 2017: Psychiatria Danubina
https://www.readbyqxmd.com/read/28953788/benzodiazepines-in-combination-with-antipsychotic-drugs-for-schizophrenia-gaba-ergic-targeted-therapy
#10
Adam Włodarczyk, Joanna Szarmach, Wiesław Jerzy Cubała, Mariusz Stanisław Wiglusz
Antipsychotics are a key intervention strategy in pharmacotherapy of schizophrenia. However, benzodiazepines are often prescribed to control sleep disturbances, anxiety or behavioural disinhibition. There is clinical evidence for the beneficial effect of the combined treatment of antipsychotics and benzodiazepines resulting in more favorable treatment outcome in schizophrenia with regard to positive and negative symptoms. This clinical phenomenon seems to be associated with the GABA-ergic activit ythat is believed to be disrupted in the schizophrenia and direct benzodiazepines effect on GABA-A receptors...
September 2017: Psychiatria Danubina
https://www.readbyqxmd.com/read/28926001/ketamine-differential-neurophysiological-dynamics-in-functional-networks-in-the-rat-brain
#11
A Ahnaou, H Huysmans, R Biermans, N V Manyakov, W H I M Drinkenburg
Recently, the N-methyl-d-aspartate-receptor (NMDAR) antagonist ketamine has emerged as a fast-onset mechanism to achieve antidepressant activity, whereas its psychomimetic, dissociative and amnestic effects have been well documented to pharmacologically model schizophrenia features in rodents. Sleep-wake architecture, neuronal oscillations and network connectivity are key mechanisms supporting brain plasticity and cognition, which are disrupted in mood disorders such as depression and schizophrenia. In rats, we investigated the dynamic effects of acute and chronic subcutaneous administration of ketamine (2...
September 19, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28919128/pregabalin-for-anxiety-in-patients-with-schizophrenia-a-randomized-double-blind-placebo-controlled-study
#12
Ole Schjerning, Per Damkier, Signe Engelhardt Lykkegaard, Klaus Damgaard Jakobsen, Jimmi Nielsen
INTRODUCTION: Anxiety is frequent in patients with schizophrenia and poses a major impact on patients perceived quality of life, daily functioning and risk of suicide. Pregabalin has shown effective in the treatment of generalized anxiety disorder and has been suggested for the treatment of anxiety in patients with schizophrenia. As evidence is sparse regarding treatment of anxiety in this patient group, we aimed to investigate the use of pregabalin for anxiety in patients with schizophrenia...
September 14, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28916298/childhood-trauma-depression-and-sleep-quality-and-their-association-with-psychotic-symptoms-and-suicidality-in-schizophrenia
#13
Esin Evren Kilicaslan, Asli Tugba Esen, Meltem Izci Kasal, Erdal Ozelci, Murat Boysan, Mustafa Gulec
This study involved the examination of the relationship between childhood trauma and both psychotic symptoms and suicidality in patients with schizophrenia after controlling for the possible confounding factors, such as clinical features, depression, and sleep quality. The Childhood Trauma Questionnaire-Short Form, Positive and Negative Syndrome Scale (PANSS), Calgary Depression Scale for Schizophrenia (CDSS), Pittsburgh Sleep Quality Index (PSQI), and the suicidality subscale of Mini-International Neuropsychiatric Interview (MINI) were administered to 199 patients with schizophrenia...
December 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28902457/the-role-of-clock-gene-in-psychiatric-disorders-evidence-from-human-and-animal-research
#14
REVIEW
Jaqueline B Schuch, Julia P Genro, Clarissa R Bastos, Gabriele Ghisleni, Luciana Tovo-Rodrigues
The circadian clock system drives daily rhythms in physiology, metabolism, and behavior in mammals. Molecular mechanisms of this system consist of multiple clock genes, with Circadian Locomotor Output Cycles Kaput (CLOCK) as a core member that plays an important role in a wide range of behaviors. Alterations in the CLOCK gene are associated with common psychiatric disorders as well as with circadian disturbances comorbidities. This review addresses animal, molecular, and genetic studies evaluating the role of the CLOCK gene on many psychiatric conditions, namely autism spectrum disorder, schizophrenia, attention-deficit/hyperactivity disorder, major depressive disorder, bipolar disorder, anxiety disorder, and substance use disorder...
September 13, 2017: American Journal of Medical Genetics. Part B, Neuropsychiatric Genetics
https://www.readbyqxmd.com/read/28827214/mobile-mindfulness-intervention-on-an-acute-psychiatric-unit-feasibility-and-acceptability-study
#15
Lisa A Mistler, Dror Ben-Zeev, Elizabeth Carpenter-Song, Mary F Brunette, Matthew J Friedman
BACKGROUND: Aggression and violence on acute psychiatric inpatient units is extensive and leads to negative sequelae for staff and patients. With increasingly acute inpatient milieus due to shorter lengths of stay, inpatient staff is limited in training and time to be able to provide treatments. Mobile technology provides a new platform for offering treatment on such units, but it has not been tested for feasibility or usability in this particular setting. OBJECTIVE: The aim of this study was to examine the feasibility, usability, and acceptability of a brief mindfulness meditation mobile phone app intended to reduce anger and aggression in acute psychiatric inpatients with schizophrenia, schizoaffective disorder, or bipolar disorder, and a history of violence...
August 21, 2017: JMIR Mental Health
https://www.readbyqxmd.com/read/28826411/auditory-hallucinations-not-necessarily-a-hallmark-of-psychotic-disorder
#16
F Waters, J D Blom, R Jardri, K Hugdahl, I E C Sommer
Auditory hallucinations (AH) are often considered a sign of a psychotic disorder. This is promoted by the DSM-5 category of Other Specified Schizophrenia Spectrum And Other Psychotic Disorder (OSSSOPD), the diagnostic criteria for which are fulfilled with the sole presence of persistent AH, in the absence of any other psychotic symptoms. And yet, persistent AH are not synonymous with having a psychotic disorder, and should therefore not be uncritically treated as such. Many people who seek treatment for persistent AH have no other psychotic symptoms, have preserved reality-testing capacities, and will never develop a schizophrenia spectrum disorder...
August 22, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/28792954/variants-in-calcium-voltage-gated-channel-subunit-alpha1-c-gene-cacna1c-are-associated-with-sleep-latency-in-infants
#17
Katri Kantojärvi, Johanna Liuhanen, Outi Saarenpää-Heikkilä, Anna-Liisa Satomaa, Anneli Kylliäinen, Pirjo Pölkki, Julia Jaatela, Auli Toivola, Lili Milani, Sari-Leena Himanen, Tarja Porkka-Heiskanen, Juulia Paavonen, Tiina Paunio
Genetic variants in CACNA1C (calcium voltage-gated channel subunit alpha1 C) are associated with bipolar disorder and schizophrenia where sleep disturbances are common. In an experimental model, Cacna1c has been found to modulate the electrophysiological architecture of sleep. There are strong genetic influences for consolidation of sleep in infancy, but only a few studies have thus far researched the genetic factors underlying the process. We hypothesized that genetic variants in CACNA1C affect the regulation of sleep in early development...
2017: PloS One
https://www.readbyqxmd.com/read/28736215/human-ipsc-glial-mouse-chimeras-reveal-glial-contributions-to-schizophrenia
#18
Martha S Windrem, Mikhail Osipovitch, Zhengshan Liu, Janna Bates, Devin Chandler-Militello, Lisa Zou, Jared Munir, Steven Schanz, Katherine McCoy, Robert H Miller, Su Wang, Maiken Nedergaard, Robert L Findling, Paul J Tesar, Steven A Goldman
In this study, we investigated whether intrinsic glial dysfunction contributes to the pathogenesis of schizophrenia (SCZ). Our approach was to establish humanized glial chimeric mice using glial progenitor cells (GPCs) produced from induced pluripotent stem cells derived from patients with childhood-onset SCZ. After neonatal implantation into myelin-deficient shiverer mice, SCZ GPCs showed premature migration into the cortex, leading to reduced white matter expansion and hypomyelination relative to controls...
August 3, 2017: Cell Stem Cell
https://www.readbyqxmd.com/read/28720848/the-natural-disc1-deletion-present-in-several-inbred-mouse-strains-does-not-affect-sleep
#19
Lars Dittrich, Alessandro Petese, Walker S Jackson
The gene Disrupted in Schizophrenia-1 (DISC1) is linked to a range of psychiatric disorders. Two recent transgenic studies suggest DISC1 is also involved in homeostatic sleep regulation. Several strains of inbred mice commonly used for genome manipulation experiments, including several Swiss and likely all 129 substrains, carry a natural deletion mutation of Disc1. This constitutes a potential confound for studying sleep in genetically modified mice. Since disturbed sleep can also influence psychiatric and neurodegenerative disease models, this putative confound might affect a wide range of studies in several fields...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28714081/combining-two-model-systems-of-psychosis-the-effects-of-schizotypy-and-sleep-deprivation-on-oculomotor-control-and-psychotomimetic-states
#20
Inga Meyhöfer, Maria Steffens, Eliana Faiola, Anna-Maria Kasparbauer, Veena Kumari, Ulrich Ettinger
Model systems of psychosis, such as schizotypy or sleep deprivation, are valuable in informing our understanding of the etiology of the disorder and aiding the development of new treatments. Schizophrenia patients, high schizotypes, and sleep-deprived subjects are known to share deficits in oculomotor biomarkers. Here, we aimed to further validate the schizotypy and sleep deprivation models and investigated, for the first time, their interactive effects on smooth pursuit eye movements (SPEM), prosaccades, antisaccades, predictive saccades, and measures of psychotomimetic states, anxiety, depression, and stress...
November 2017: Psychophysiology
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