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Depression in schizophrenia

Kai G Kahl, Michael Deuschle, Brendon Stubbs, Ulrich Schweiger
Background Severe mental illnesses (SMIs), i.e. major depression, schizophrenia and bipolar disorder, are associated with an elevated risk for the development of type-2 diabetes mellitus and cardiovascular disorders. Several factors have been associated with increased cardiometabolic morbidity and mortality in SMI, including lifestyle factors (smoking, inactivity, unhealthy diet), endocrine and immunologic alterations; however, the underlying mechanisms remain to be fully uncovered. It is now well accepted that visceral adipose tissue (VAT) promotes the development of cardiometabolic disorders, at least in part by inflammatory and metabolic functions...
March 16, 2018: Hormone Molecular Biology and Clinical Investigation
Tamar Mendelson, William W Eaton
PURPOSE: Prevention of mental disorders is a rapidly growing area of research with substantial potential benefits for population health. This paper reviews the evidence base for prevention of depression, anxiety, and schizophrenia. METHODS: We synthesized evidence from recent systematic reviews and meta-analyses published between 2013 and 2018 on prevention of depression, anxiety, and first-episode psychosis. We included reviews of randomized controlled trials testing psychological, psychosocial, and pharmacological preventive interventions...
March 15, 2018: Social Psychiatry and Psychiatric Epidemiology
Emanuele F Osimo, Rudolf N Cardinal, Peter B Jones, Golam M Khandaker
Low-grade inflammation is a risk factor for depression, psychosis and other major psychiatric disorders. It is associated with poor response to antidepressant and antipsychotics, and could potentially be a treatment target. However, there is limited data on the prevalence of low-grade inflammation in major psychiatric disorders, and on the characteristics of patients who show evidence of inflammation. We examined the prevalence of low-grade inflammation and associated socio-demographic and clinical factors in acute psychiatric inpatients...
March 1, 2018: Psychoneuroendocrinology
Germano Orrù, Mauro Giovanni Carta
Background: Bipolar Disorder (BD), along with depression and schizophrenia, is one of the most serious mental illnesses, and one of the top 20 causes of severe impairment in everyday life. Recent molecular studies, using both traditional approaches and new procedures such as Whole-Genome Sequencing (WGS), have suggested that genetic factors could significantly contribute to the development of BD, with heritability estimates of up to 85%. However, it is assumed that BD is a multigenic and multifactorial illness with environmental factors that strongly contribute to disease development/progression, which means that progress in genetic knowledge of BD might be difficult to interpret in clinical practice...
2018: Clinical Practice and Epidemiology in Mental Health: CP & EMH
Changqing Lu, Lihua Dong, Hui Zhou, Qianmei Li, Guojiao Huang, Shu Jun Bai, Linchuan Liao
Oligodendrocytes are the myelin-producing cells of the central nervous system (CNS). A variety of brain disorders from "classical" demyelinating diseases, such as multiple sclerosis, stroke, schizophrenia, depression, Down syndrome and autism, are shown myelination defects. Oligodendrocyte myelination is regulated by a complex interplay of intrinsic, epigenetic and extrinsic factors. Gpr17 (G protein-coupled receptor 17) is a G protein-coupled receptor, and has been identified to be a regulator for oligodendrocyte development...
March 14, 2018: Scientific Reports
Irene Bighelli, Georgia Salanti, Cornelia Reitmeir, Sofia Wallis, Corrado Barbui, Toshi A Furukawa, Stefan Leucht
INTRODUCTION: There is rising awareness that we need multidisciplinary approaches integrating psychological treatments for schizophrenia, but a comprehensive evidence based on their relative efficacy is lacking. We will conduct a network meta-analysis (NMA), integrating direct and indirect comparisons from randomised controlled trials (RCTs) to rank psychological treatments for schizophrenia according to their efficacy, acceptability and tolerability. METHODS AND ANALYSIS: We will include all RCTs comparing a psychological treatment aimed at positive symptoms of schizophrenia with another psychological intervention or with a no treatment condition (waiting-list and treatment as usual)...
March 14, 2018: BMJ Open
Sally-Ann Cooper, Elita Smiley, Linda Allan, Jillian Morrison
BACKGROUND: Incidence and determinants of affective disorders among adults with intellectual disabilities are unknown. Aims To investigate affective disorder incidence, and determinants of unipolar depression, compared with general population reports. METHOD: Prospective cohort study measuring mental ill health of adults with mild to profound intellectual disabilities living within a defined community, over 2 years. RESULTS: There was 70% cohort retention (n = 651)...
March 15, 2018: British Journal of Psychiatry: the Journal of Mental Science
Matthew W Roché, Douglas J Boyle, Chia-Cherng Cheng, Jill Del Pozzo, Lindsay Cherneski, Joe Pascarella, Alicia Lukachko, Steven M Silverstein
Research has consistently demonstrated that people diagnosed with serious mental illness (SMI) are at increased risk for violent ideation and behavior (VIB) and that this is especially the case for SMI patients with comorbid substance use disorders (SUD). Despite this, what is still largely unknown is the relative prevalence of VIB across diagnostic categories, whether the rates of VIB in SMI groups exceed the rates observed in people with SUD only, and which demographic factors increase the likelihood of VIB under different circumstances for people with SMI...
March 1, 2018: Journal of Interpersonal Violence
C R Krynicki, R Upthegrove, J F W Deakin, T R E Barnes
OBJECTIVE: To provide an update on the evidence base for the nature of the relationship between negative symptoms and depressive features in people with schizophrenia, and propose new models that reflect their complex relationship. METHOD: A systematic review following PRISMA guidelines. A total of 2210 articles were identified from EMBASE, PsychInfo and MEDLINE, and further two articles were hand-searched from references. Twenty-seven met inclusion criteria and were included in the review...
March 13, 2018: Acta Psychiatrica Scandinavica
Sumit Mistry, Judith R Harrison, Daniel J Smith, Valentina Escott-Price, Stanley Zammit
BACKGROUND: Identifying the phenotypic manifestations of increased genetic liability for depression (MDD) and bipolar disorder (BD) can enhance understanding of their aetiology. The polygenic risk score (PRS) derived using data from genome-wide-association-studies can be used to explore how genetic risk is manifest in different samples. AIMS: In this systematic review, we review studies that examine associations between the MDD and BD polygenic risk scores and phenotypic outcomes...
February 15, 2018: Journal of Affective Disorders
Rick P F Wolthusen, Garth Coombs, Emily A Boeke, Stefan Ehrlich, Stephanie N DeCross, Shahin Nasr, Daphne J Holt
BACKGROUND: Delusions are a defining and common symptom of psychotic disorders. Recent evidence suggests that subclinical and clinical delusions may represent distinct stages on a phenomenological and biological continuum. However, few studies have tested whether subclinical psychotic experiences are associated with neural changes that are similar to those observed in clinical psychosis. For example, it is unclear if overactivity of the hippocampus, a replicated finding of neuroimaging studies of schizophrenia, is also present in individuals with subclinical psychotic symptoms...
February 2018: Biological Psychiatry: Cognitive Neuroscience and Neuroimaging
Susan S Kuo, Laura Almasy, Ruben C Gur, Konasale Prasad, David R Roalf, Raquel E Gur, Vishwajit L Nimgaonkar, Michael F Pogue-Geile
Although cognition is one of the most important predictors of community functioning in schizophrenia, little is known about the causes of this correlation. To our knowledge, this study is the first to examine the extent to which this correlation is genetically mediated and whether the genetic correlation is specific to schizophrenia. Six hundred thirty-six participants from 43 multigenerational families with at least two relatives with schizophrenia and 135 unrelated controls underwent diagnostic interview and cognition and functioning assessment...
February 2018: Journal of Abnormal Psychology
Margaret O Akinhanmi, Joanna M Biernacka, Stephen M Strakowski, Susan L McElroy, Joyce E Balls Berry, Kathleen R Merikangas, Shervin Assari, Melvin G McInnis, Thomas G Schulze, Marion LeBoyer, Carol Tamminga, Christi Patten, Mark A Frye
OBJECTIVES: Health disparities between individuals of African and European ancestry are well documented. The disparities in bipolar disorder may be driven by racial bias superimposed on established factors contributing to misdiagnosis, including: evolving empirically based diagnostic criteria (International Classification of Diseases [ICD], Research Diagnostic Criteria [RDC] and Diagnostic and Statistical Manual [DSM]), multiple symptom domains (i.e. mania, depression and psychosis), and multimodal medical and additional psychiatric comorbidity...
March 12, 2018: Bipolar Disorders
R J T Mocking, J Assies, H G Ruhé, A H Schene
Continuous research into the pathophysiology of psychiatric disorders, such as major depressive disorder (MDD), posttraumatic stress disorder (PTSD), and schizophrenia, suggests an important role for metabolism. This narrative review will provide an up-to-date summary of how metabolism is thought to be involved in the pathophysiology of these psychiatric disorders. We will focus on (I) the important role of fatty acids in these metabolic alterations, (II) whether fatty acid alterations represent epiphenomena or risk factors, and (III) similarities and dissociations in fatty acid alterations between different psychiatric disorders...
March 9, 2018: Journal of Inherited Metabolic Disease
E M Peter-Ross
The pathobiological causes, the shared cellular and molecular pathways in catatonia and in catatonic presentation in neuropsychiatric disorders are yet to be determined. The hypotheses in this paper have been deduced from the latest scientific research findings and clinical observations of patients with genetic disorders, behavioral phenotypes and other family members suffering mental disorders. The first hypothesis postulates that catatonia and the heterogeneity of catatonic signs and symptoms involve nucleolar dysfunction arising from abnormalities of the brain-specific, non-coding micro-RNA, SNORD115 genes (either duplications or deletions) which result in pathobiological dysfunction of various combinations in the downstream pathways (possibly along with other genes in these shared pathways)...
April 2018: Medical Hypotheses
Agnieszka Zagorska, Anna Partyka, Adam Bucki, Alicja Gawalska, Anna Czopek, Maciej Pawlowski
BACKGROUND: The phosphodiesterase 10 (PDE10) family, identified in 1999, is mainly expressed in the brain, particularly in the striatum, within the medium spiny neurons, nucleus accumbens, and olfactory tubercle. Inhibitors of PDE10 (PDE10-Is) are a conceptually rational subject for medicinal chemistry with potential use in the treatment of psychiatric and neurodegenerative diseases. OBJECTIVE: This review is based on peer-reviewed published articles, and summarizes the cellular and molecular biology of PDE10 as a rational target for psychiatric and neurodegenerative drug discovery...
March 8, 2018: Current Medicinal Chemistry
Frederike Schirmbeck, Max Konijn, Vera Hoetjes, Mathias Zink, Lieuwe de Haan
Obsessive-compulsive symptoms (OCS) are frequently reported in patients with schizophrenia and have been associated with subjective distress and higher impairment. Recent studies suggest fluctuation in co-occurring OCS and associations with the course of psychotic symptoms. Current evidence is limited by few studies with long assessments intervals and a sole focus on between-subject comparisons. The aim of this study was to specifically investigate co-variation of symptom domains over time within individuals...
March 8, 2018: European Archives of Psychiatry and Clinical Neuroscience
Ketan K Marballi, Amelia L Gallitano
While the causes of myriad medical and infectious illnesses have been identified, the etiologies of neuropsychiatric illnesses remain elusive. This is due to two major obstacles. First, the risk for neuropsychiatric disorders, such as schizophrenia, is determined by both genetic and environmental factors. Second, numerous genes influence susceptibility for these illnesses. Genome-wide association studies have identified at least 108 genomic loci for schizophrenia, and more are expected to be published shortly...
2018: Frontiers in Behavioral Neuroscience
N Schnyder, C Michel, R Panczak, S Ochsenbein, B G Schimmelmann, F Schultze-Lutter
BACKGROUND: The stigma of mental illness, especially personal attitudes towards psychiatric patients and mental health help-seeking, is an important barrier in healthcare utilisation. These attitudes are not independent of each other and are also influenced by other factors, such as mental health literacy, especially the public's causal explanations for mental problems. We aimed to disentangle the interrelations between the different aspects of stigma and causal explanations with respect to their association with healthcare utilisation...
March 6, 2018: European Psychiatry: the Journal of the Association of European Psychiatrists
Simon Cervenka
The dopamine (DA) system is considered to be centrally involved in the pathophysiology of several major psychiatric disorders. Using positron emission tomography (PET), aberrations in dopamine D2/D3-receptors (D2-R) levels and uptake of the DA precursor FDOPA have been shown for schizophrenia, substance abuse and depression. Radioligands for the dopamine D1-receptor (D1-R) have been available for more than three decades, however this receptor subtype has received much less attention in psychiatry research. Here, studies investigating D1-R in psychiatric patients in comparison to healthy control subjects are summarized...
March 5, 2018: Neuroscience Letters
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