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https://www.readbyqxmd.com/read/28039552/cerebrospinal-fluid-microglia-and-neurodegenerative-markers-in-twins-concordant-and-discordant-for-psychotic-disorders
#1
Viktoria Johansson, Joel Jakobsson, Rebecca G Fortgang, Henrik Zetterberg, Kaj Blennow, Tyrone D Cannon, Christina M Hultman, Lennart Wetterberg, Mikael Landén
Schizophrenia and bipolar disorder are debilitating psychiatric disorders with partially shared symptomatology including psychotic symptoms and cognitive impairment. Aberrant levels of microglia and neurodegenerative cerebrospinal fluid (CSF) markers have previously been found in schizophrenia and bipolar disorder. We aimed to analyze familial and environmental influences on these CSF markers and their relation to psychiatric symptoms and cognitive ability. CSF was collected from 17 complete twin pairs, nine monozygotic and eight dizygotic, and from one twin sibling...
December 30, 2016: European Archives of Psychiatry and Clinical Neuroscience
https://www.readbyqxmd.com/read/27993229/development-of-two-dimensional-measures-of-restricted-and-repetitive-behavior-in-parents-and-children
#2
David W Evans, Mirko Uljarević, Laina G Lusk, Eva Loth, Thomas Frazier
OBJECTIVE: Restricted and repetitive behaviors (RRBs) are a heterogeneous set of behaviors common across a wide range of neurodevelopmental disorders (NDDs) and neuropsychiatric disorders (NPDs) that extend well into the general population. This study introduces 2 dimensional measurements of RRBs for use in typical and clinical populations from infancy to adulthood. METHOD: The Childhood Routines Inventory-Revised (CRI-R) and the Adult Routines Inventory (ARI) were created and administered online to a nationally representative cohort of 3,108 parents with 3,032 children (range 12 months to 17 years 11 months)...
January 2017: Journal of the American Academy of Child and Adolescent Psychiatry
https://www.readbyqxmd.com/read/27988852/obsessive-compulsive-symptoms-and-overall-psychopathology-in-psychotic-disorders-longitudinal-assessment-of-patients-and-siblings
#3
Frederike Schirmbeck, Marije Swets, Carin J Meijer, Mathias Zink, Lieuwe de Haan
The course of obsessive-compulsive symptoms (OCS) and its association with alterations in other clinical variables in patients with psychotic disorders is insufficiently known. Patients (n = 602) and unaffected siblings (n = 652) from the Dutch Genetic Risk and Outcome of Psychosis (GROUP) study were investigated at baseline and after 3 years. Participants were assigned to four groups based on the course of OCS over time: no-OCS, persistent OCS, initial OCS and de novo OCS. In addition to cross-sectional comparisons, longitudinal associations between changes in OCS and symptoms of schizophrenia and general functioning were investigated...
December 17, 2016: European Archives of Psychiatry and Clinical Neuroscience
https://www.readbyqxmd.com/read/27942861/decreased-white-matter-fa-values-in-the-left-inferior-frontal-gyrus-is-a-possible-intermediate-phenotype-of-schizophrenia-evidences-from-a-novel-group-strategy
#4
Jianjun Ou, Hailong Lyu, Maorong Hu, Jun Li, Wenbin Guo, Xiaofeng Guo, Lihua Li, Junjie Zheng, Qinling Wei, Feng Liu, Zhong He, Juan Wang, Fang Liu, Renrong Wu, Jindong Chen, Lehua Li, Bin Hu, Huafu Chen, Jingping Zhao
Intermediate phenotype could be used to investigate genetic susceptibility. However, genetic and environmental heterogeneity may interfere with identification of intermediate phenotypes. In this study, we minimized these interferences by using a novel group strategy. A total of 22 drug-naive and first-episode schizophrenia (FES) patients, along with 22 of their kin healthy siblings (HS), 22 non-kin healthy siblings (nHS) of other schizophrenia patients and 22 healthy controls (HC), were recruited. Brain imaging was acquired from the participants...
December 9, 2016: European Archives of Psychiatry and Clinical Neuroscience
https://www.readbyqxmd.com/read/27931915/stratifying-empiric-risk-of-schizophrenia-among-first-degree-relatives-using-multiple-predictors-in-two-independent-indian-samples
#5
Triptish Bhatia, Elizabeth A Gettig, Irving I Gottesman, Jonathan Berliner, N N Mishra, Vishwajit L Nimgaonkar, Smita N Deshpande
BACKGROUND: Schizophrenia (SZ) has an estimated heritability of 64-88%, with the higher values based on twin studies. Conventionally, family history of psychosis is the best individual-level predictor of risk, but reliable risk estimates are unavailable for Indian populations. Genetic, environmental, and epigenetic factors are equally important and should be considered when predicting risk in 'at risk' individuals. OBJECTIVE: To estimate risk based on an Indian schizophrenia participant's family history combined with selected demographic factors...
December 2016: Asian Journal of Psychiatry
https://www.readbyqxmd.com/read/27886638/preliminary-evidence-that-negative-symptom-severity-relates-to-multilocus-genetic-profile-for-dopamine-signaling-capacity-and-d2-receptor-binding-in-healthy-controls-and-in-schizophrenia
#6
Sarah A Eisenstein, Ryan Bogdan, Ling Chen, Stephen M Moerlein, Kevin J Black, Joel S Perlmutter, Tamara Hershey, Deanna M Barch
Deficits in central, subcortical dopamine (DA) signaling may underlie negative symptom severity, particularly anhedonia, in healthy individuals and in schizophrenia. To investigate these relationships, we assessed negative symptoms with the Schedule for the Assessment of Negative Symptoms and the Brief Negative Symptom Scale (BNSS) and self-reported anhedonia with the Scales for Physical and Social Anhedonia (SPSA), Temporal Experience of Pleasure Scale, and Snaith-Hamilton Pleasure Scale in 36 healthy controls (HC), 27 siblings (SIB) of individuals with schizophrenia, and 66 individuals with schizophrenia or schizoaffective disorder (SCZ)...
November 17, 2016: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/27881919/posttraumatic-stress-and-depression-in-yazidi-refugees
#7
Serhat Nasıroğlu, Veysi Çeri
AIM: The aim of this investigation was to determine the frequency of mental pathologies in children and adolescents of the Yazidi minority group who immigrated to Turkey from Iraq. The refugees were asked about preventive and risk factors that occurred before and after their immigration. SUBJECTS AND METHODS: The sample comprised 55 children and adolescents (30 males and 25 females) who were Yazidi refugees and had settled in the Uçkuyular, Oğuz, Onbaşı, and Uğurca villages of Batman, Turkey...
2016: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/27873559/educational-achievement-in-psychiatric-patients-and-their-siblings-a-register-based-study-in-30-000-individuals-in-the-netherlands
#8
W M Tempelaar, F Termorshuizen, J H MacCabe, M P M Boks, R S Kahn
BACKGROUND: Poor educational achievement is associated with a range of psychiatric disorders. Several studies suggest that this underperformance is due to cognitive deficits that commence before disease onset and reflect a genetic risk for this disorder. However, the specificity and the familial contribution of this cognitive deficit are not clear. We analysed lifetime educational achievement of psychiatric patients diagnosed with schizophrenia, bipolar or depressive disorder and their unaffected siblings...
November 22, 2016: Psychological Medicine
https://www.readbyqxmd.com/read/27834215/diffusion-weighted-imaging-uncovers-likely-sources-of-processing-speed-deficits-in-schizophrenia
#9
Peter Kochunov, Laura M Rowland, Els Fieremans, Jelle Veraart, Neda Jahanshad, George Eskandar, Xiaoming Du, Florian Muellerklein, Anya Savransky, Dinesh Shukla, Hemalatha Sampath, Paul M Thompson, L Elliot Hong
Schizophrenia, a devastating psychiatric illness with onset in the late teens to early 20s, is thought to involve disrupted brain connectivity. Functional and structural disconnections of cortical networks may underlie various cognitive deficits, including a substantial reduction in the speed of information processing in schizophrenia patients compared with controls. Myelinated white matter supports the speed of electrical signal transmission in the brain. To examine possible neuroanatomical sources of cognitive deficits, we used a comprehensive diffusion-weighted imaging (DWI) protocol and characterized the white matter diffusion signals using diffusion kurtosis imaging (DKI) and permeability-diffusivity imaging (PDI) in patients (n = 74), their nonill siblings (n = 41), and healthy controls (n = 113)...
November 22, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27829189/dti-microstructural-abnormalities-in-adolescent-siblings-of-patients-with-childhood-onset-schizophrenia
#10
Dana Waltzman, Barbara Jean Knowlton, Jessica Rachel Cohen, Susan Yost Bookheimer, Robert Martin Bilder, Robert Franklin Asarnow
No abstract text is available yet for this article.
December 30, 2016: Psychiatry Research
https://www.readbyqxmd.com/read/27786353/longitudinal-study-of-cerebral-surface-morphology-in-youth-with-22q11-2-deletion-syndrome-and-association-with-positive-symptoms-of-psychosis
#11
Petya D Radoeva, Ravi Bansal, Kevin M Antshel, Wanda Fremont, Bradley S Peterson, Wendy R Kates
BACKGROUND: 22q11.2 deletion syndrome (22q11DS) is a genetic disorder that greatly increases risk of developing schizophrenia. We previously characterized cerebral surface morphology trajectories from late childhood to mid adolescence in a cohort of youth with 22q11DS. Herein, we extend the study period into early adulthood, and describe further the trajectories associated with severe psychiatric symptoms in this cohort. METHODS: Participants included 76 youth with 22q11DS and 30 unaffected siblings, assessed at three timepoints, during which high resolution, anatomic magnetic resonance images were acquired...
October 27, 2016: Journal of Child Psychology and Psychiatry, and Allied Disciplines
https://www.readbyqxmd.com/read/27770667/altered-cortical-processing-of-motor-inhibition-in-schizophrenia
#12
Påvel G Lindberg, Maxime Térémetz, Sylvain Charron, Oussama Kebir, Agathe Saby, Narjes Bendjemaa, Stéphanie Lion, Benoît Crépon, Raphaël Gaillard, Catherine Oppenheim, Marie-Odile Krebs, Isabelle Amado
Inhibition is considered a key mechanism in schizophrenia. Short-latency intracortical inhibition (SICI) in the motor cortex is reduced in schizophrenia and is considered to reflect locally deficient γ-aminobutyric acid (GABA)-ergic modulation. However, it remains unclear how SICI is modulated during motor inhibition and how it relates to neural processing in other cortical areas. Here we studied motor inhibition Stop signal task (SST) in stabilized patients with schizophrenia (N = 28), healthy siblings (N = 21) and healthy controls (n = 31) matched in general cognitive status and educational level...
September 30, 2016: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/27759181/experiences-of-caring-for-a-sibling-with-schizophrenia-in-a-chinese-context-a-neglected-issue
#13
Cheng-I Yang, Min-Yun Hsieh, Li-Hung Lee, Shu-Ling Chen
Adult clients with schizophrenia are primarily cared for by their ageing parents. When the parents become ill or die, siblings are considered to be responsible for taking over the caregiving role. However, little is known about caregiving for a sibling with schizophrenia, and no studies have explored this phenomenon in an Asian context. The aim of the present descriptive, qualitative study was to understand the experiences of being the primary caregiver of a sibling with schizophrenia. Data were collected from 10 siblings of currently-hospitalized patients diagnosed with schizophrenia using semistructured, in-depth interviews...
October 19, 2016: International Journal of Mental Health Nursing
https://www.readbyqxmd.com/read/27639418/saccadic-eye-movements-as-markers-of-schizophrenia-spectrum-exploration-in-at-risk-mental-states
#14
Simona Caldani, Maria Pia Bucci, Jean-Charles Lamy, Magali Seassau, Narjes Bendjemaa, Rémi Gadel, Raphael Gaillard, Marie-Odile Krebs, Isabelle Amado
Schizophrenia is a neurodevelopmental disease with cognitive and motor impairments. Motor dysfunctions, such as eye movements or Neurological Soft Signs (NSS), are proposed as endophenotypic markers. Antisaccade (AS) and memory-guided saccades (MGS), two markers of inhibitory control mechanism, are altered in both patients with schizophrenia and their relatives, although these tools may have different sensitivities. Recently, emphasis has been put on identifying markers predictive of psychosis transition in subjects with ultra-high-risk psychosis in order to develop targeted prevention...
September 14, 2016: Schizophrenia Research
https://www.readbyqxmd.com/read/27632907/examining-the-continuum-of-psychosis-frequency-and-characteristics-of-psychotic-like-symptoms-in-relatives-and-non-relatives-of-patients-with-schizophrenia
#15
R Landin-Romero, P J McKenna, A Romaguera, E Álvarez-Moya, S Sarró, C Aguirre, C Sarri, A Compte, C Bosque, R Salvador, E Pomarol-Clotet
BACKGROUND: A key finding underlying the continuum of psychosis concept is the presence of psychotic-like experiences (PLEs) in healthy subjects. However, it remains uncertain to what extent these experiences are related to the genetic risk for schizophrenia and how far they actually resemble attenuated forms of psychotic symptoms. METHODS: Forty-nine adults with no history of mental illness in first-degree relatives and 59 siblings of patients with schizophrenia were rated on the psychosis section of the Computerized Diagnostic Interview Schedule IV (C DIS-IV) and the Rust Inventory of Schizotypal Cognitions (RISC)...
December 2016: Schizophrenia Research
https://www.readbyqxmd.com/read/27570355/comment-on-neurocognitive-functioning-in-schizophrenia-their-unaffected-siblings-and-healthy-controls-a-comparison
#16
Jitendra Rohilla
No abstract text is available yet for this article.
July 2016: Indian Journal of Psychological Medicine
https://www.readbyqxmd.com/read/27552816/the-emerging-role-of-the-fkbp5-gene-polymorphisms-in-vulnerability-stress-model-of-schizophrenia-further-evidence-from-a-serbian-population
#17
Marina Mihaljevic, Katarina Zeljic, Ivan Soldatovic, Sanja Andric, Tijana Mirjanic, Alexander Richards, Kiran Mantripragada, Tatjana Pekmezovic, Ivana Novakovic, Nadja P Maric
Increased reactivity to stress is observed in patients with schizophrenia spectrum disorders and their healthy siblings in comparison with the general population. Additionally, higher levels of neuroticism, as a proposed psychological measure of stress sensitivity, increase the risk of schizophrenia. HPA axis dysregulation is one of the possible mechanisms related to the vulnerability-stress model of schizophrenia, and recent studies revealed a possible role of the functional genetic variants of FK506-binding protein 51 (FKBP5) gene which modulate activity of HPA axis...
August 23, 2016: European Archives of Psychiatry and Clinical Neuroscience
https://www.readbyqxmd.com/read/27516123/age-at-fatherhood-heritability-and-associations-with-psychiatric-disorders
#18
E M Frans, P Lichtenstein, C M Hultman, R Kuja-Halkola
BACKGROUND: Advancing paternal age has been linked to psychiatric disorders. These associations might be caused by the increased number of de novo mutations transmitted to offspring of older men. It has also been suggested that the associations are confounded by a genetic liability for psychiatric disorders in parents. The aim of this study was to indirectly test the confounding hypotheses by examining if there is a genetic component to advancing paternal age and if men with a genetic liability for psychiatric disorders have children at older ages...
October 2016: Psychological Medicine
https://www.readbyqxmd.com/read/27513883/polycystic-ovary-syndrome-and-psychiatric-disorders-co-morbidity-and-heritability-in-a-nationwide-swedish-cohort
#19
Carolyn E Cesta, Mattias Månsson, Camilla Palm, Paul Lichtenstein, Anastasia N Iliadou, Mikael Landén
Polycystic ovary syndrome (PCOS) is an endocrine disorder affecting 5-15% of reproductive-aged women and characterized by high levels of circulating androgens. Given that androgens have been implicated in the aetiology of several psychiatric disorders, it was hypothesized that women with PCOS have high risk for psychiatric comorbidity. We aimed to investigate this risk amongst women with PCOS, as well as in their siblings, to elucidate if familial factors underlie any potential associations. Using the Swedish national registers, we identified all women diagnosed with PCOS between 1990 and 2013 (n=24,385), their full-siblings (n=25,921), plus matched individuals (1:10/100) from the general population and their full-siblings...
November 2016: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/27449252/grey-matter-volume-patterns-in-thalamic-nuclei-are-associated-with-familial-risk-for-schizophrenia
#20
Giulio Pergola, Silvestro Trizio, Pasquale Di Carlo, Paolo Taurisano, Marina Mancini, Nicola Amoroso, Maria Antonietta Nettis, Ileana Andriola, Grazia Caforio, Teresa Popolizio, Antonio Rampino, Annabella Di Giorgio, Alessandro Bertolino, Giuseppe Blasi
Previous evidence suggests reduced thalamic grey matter volume (GMV) in patients with schizophrenia (SCZ). However, it is not considered an intermediate phenotype for schizophrenia, possibly because previous studies did not assess the contribution of individual thalamic nuclei and employed univariate statistics. Here, we hypothesized that multivariate statistics would reveal an association of GMV in different thalamic nuclei with familial risk for schizophrenia. We also hypothesized that accounting for the heterogeneity of thalamic GMV in healthy controls would improve the detection of subjects at familial risk for the disorder...
July 20, 2016: Schizophrenia Research
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