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Ultra-high risk for psychosis

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https://www.readbyqxmd.com/read/29440719/prefrontal-gaba-levels-hippocampal-resting-perfusion-and-the-risk-of-psychosis
#1
Gemma Modinos, Fatma Şimşek, Matilda Azis, Matthijs Bossong, Ilaria Bonoldi, Carly Samson, Beverly Quinn, Jesus Perez, Matthew R Broome, Fernando Zelaya, David J Lythgoe, Oliver D Howes, James M Stone, Anthony A Grace, Paul Allen, Philip McGuire
Preclinical models propose that the onset of psychosis is associated with hippocampal hyperactivity, thought to be driven by cortical GABAergic interneuron dysfunction and disinhibition of pyramidal neurons. Recent neuroimaging studies suggest that resting hippocampal perfusion is increased in subjects at ultra-high risk (UHR) for psychosis, but how this may be related to GABA concentrations is unknown. The present study used a multimodal neuroimaging approach to address this issue in UHR subjects. Proton magnetic resonance spectroscopy and pulsed-continuous arterial spin labeling imaging were acquired to investigate the relationship between medial prefrontal (MPFC) GABA+ levels (including some contribution from macromolecules) and hippocampal regional cerebral blood flow (rCBF) in 36 individuals at UHR of psychosis, based on preclinical evidence that MPFC dysfunction is involved in hippocampal hyperactivity...
January 30, 2018: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29410313/motor-dysfunction-as-research-domain-in-the-period-preceding-manifest-schizophrenia-a-systematic-review
#2
REVIEW
Dusan Hirjak, Andreas Meyer-Lindenberg, Katharina M Kubera, Philipp A Thomann, Robert C Wolf
Schizophrenia is a severe behavioral syndrome of neurodevelopmental nature marked by primary or genuine motor abnormalities (GMA), which refer to spontaneous and medication-independent motor phenomena. Since motor dysfunction thus might be a consequence of events occurring during early childhood and adolescence, GMA can be detected in the period preceding manifest schizophrenia. However, the question whether motor system dysfunction might be a promising motor intermediate phenotype for schizophrenia remains unanswered...
February 2, 2018: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/29358438/study-protocol-for-a-prospective-cohort-study-examining-the-predictive-potential-of-dynamic-symptom-networks-for-the-onset-and-progression-of-psychosis-the-mapping-individual-routes-of-risk-and-resilience-mirorr-study
#3
Sanne H Booij, Marieke Wichers, Peter de Jonge, Sjoerd Sytema, Jim van Os, Lex Wunderink, Johanna T W Wigman
INTRODUCTION: Our current ability to predict the course and outcome of early psychotic symptoms is limited, hampering timely treatment. To improve our understanding of the development of psychosis, a different approach to psychopathology may be productive. We propose to reconceptualise psychopathology from a network perspective, according to which symptoms act as a dynamic, interconnected system, impacting on each other over time and across diagnostic boundaries to form symptom networks...
January 21, 2018: BMJ Open
https://www.readbyqxmd.com/read/29352556/what-causes-psychosis-an-umbrella-review-of-risk-and-protective-factors
#4
Joaquim Radua, Valentina Ramella-Cravaro, John P A Ioannidis, Abraham Reichenberg, Nacharin Phiphopthatsanee, Taha Amir, Hyi Yenn Thoo, Dominic Oliver, Cathy Davies, Craig Morgan, Philip McGuire, Robin M Murray, Paolo Fusar-Poli
Psychosis is a heterogeneous psychiatric condition for which a multitude of risk and protective factors have been suggested. This umbrella review aimed to classify the strength of evidence for the associations between each factor and psychotic disorders whilst controlling for several biases. The Web of Knowledge database was searched to identify systematic reviews and meta-analyses of observational studies which examined associations between socio-demographic, parental, perinatal, later factors or antecedents and psychotic disorders, and which included a comparison group of healthy controls, published from 1965 to January 31, 2017...
February 2018: World Psychiatry: Official Journal of the World Psychiatric Association (WPA)
https://www.readbyqxmd.com/read/29352548/prediction-of-psychosis-across-protocols-and-risk-cohorts-using-automated-language-analysis
#5
Cheryl M Corcoran, Facundo Carrillo, Diego Fernández-Slezak, Gillinder Bedi, Casimir Klim, Daniel C Javitt, Carrie E Bearden, Guillermo A Cecchi
Language and speech are the primary source of data for psychiatrists to diagnose and treat mental disorders. In psychosis, the very structure of language can be disturbed, including semantic coherence (e.g., derailment and tangentiality) and syntactic complexity (e.g., concreteness). Subtle disturbances in language are evident in schizophrenia even prior to first psychosis onset, during prodromal stages. Using computer-based natural language processing analyses, we previously showed that, among English-speaking clinical (e...
February 2018: World Psychiatry: Official Journal of the World Psychiatric Association (WPA)
https://www.readbyqxmd.com/read/29338796/cortical-morphology-development-in-patients-with-22q11-2-deletion-syndrome-at-ultra-high-risk-of-psychosis
#6
Maria Carmela Padula, Marie Schaer, Marco Armando, Corrado Sandini, Daniela Zöller, Elisa Scariati, Maude Schneider, Stephan Eliez
BACKGROUND: Patients with 22q11.2 deletion syndrome (22q11DS) present a high risk of developing psychosis. While clinical and cognitive predictors for the conversion towards a full-blown psychotic disorder are well defined and largely used in practice, neural biomarkers do not yet exist. However, a number of investigations indicated an association between abnormalities in cortical morphology and higher symptoms severities in patients with 22q11DS. Nevertheless, few studies included homogeneous groups of patients differing in their psychotic symptoms profile...
January 17, 2018: Psychological Medicine
https://www.readbyqxmd.com/read/29334657/relationship-of-obsessive-compulsive-symptoms-to-clinical-variables-and-cognitive-functions-in-individuals-at-ultra-high-risk-for-psychosis
#7
Ahmet Zihni Soyata, Selin Akışık, Damla İnhanlı, Handan Noyan, Alp Üçok
Few studies have investigated the relationship between obsessive-compulsive symptoms (OCS) and clinical variables, and cognition in individuals at ultra high-risk (UHR) for psychosis. The aim of this study was to evaluate the frequency of OCS and their relationship with clinical variables and cognitive functions in individuals at UHR. Eighty-four individuals at UHR for psychosis were administered the Brief Psychiatric Rating Scale, the Yale-Brown Obsession Compulsion Symptom Check List and, the Calgary Depression Scale for Schizophrenia...
January 6, 2018: Psychiatry Research
https://www.readbyqxmd.com/read/29289662/th17-t-regulator-cell-balance-and-nk-cell-numbers-in-relation-to-psychosis-liability-and-social-stress-reactivity
#8
J Counotte, H A Drexhage, J M Wijkhuijs, R Pot-Kolder, V Bergink, H W Hoek, W Veling
BACKGROUND: Psychotic disorders are characterized by a deranged immune system, including altered number and function of Natural Killer (NK) and T cells. Psychotic disorders arise from an interaction between genetic vulnerability and exposure to environmental risk factors. Exposure to social adversity during early life is particularly relevant to psychosis risk and is thought to increase reactivity to subsequent minor daily social stressors. Virtual reality allows controlled experimental exposure to virtual social stressors...
December 28, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/29261427/addiction-vulnerability-exploring-relationships-between-cigarette-smoking-substance-misuse-and-early-psychosis
#9
Vanessa Clark, Agatha M Conrad, Terry J Lewin, Amanda L Baker, Sean A Halpin, Ketrina A Sly, Juanita Todd
OBJECTIVE: Smoking rates in adolescents at risk of psychosis are significantly greater than those who are not at risk. Recent research suggests that cigarette smoking in adolescence may be a potential marker of transition to psychosis, although the exact relationship between the two remains unclear. Our aim was to examine whether tobacco smoking is a potential marker of transition to psychosis or subsequent episodes of psychosis, independently of other substance use, or alternatively, if smoking is essentially a general marker of later mental illness episodes...
December 20, 2017: Journal of Dual Diagnosis
https://www.readbyqxmd.com/read/29249990/mediators-linking-childhood-adversities-and-trauma-to-suicidality-in-individuals-at-risk-for-psychosis
#10
Stefanie J Schmidt, Frauke Schultze-Lutter, Sarah Bendall, Nicola Groth, Chantal Michel, Nadja Inderbitzin, Benno G Schimmelmann, Daniela Hubl, Barnaby Nelson
Suicidality is highly prevalent in patients at clinical high risk (CHR) for psychosis. Childhood adversities and trauma are generally predictive of suicidality. However, the differential effects of adversity/trauma-domains and CHR-criteria, i.e., ultra-high risk and basic symptom criteria, on suicidality remain unclear. Furthermore, the underlying mechanisms and, thus, worthwhile targets for suicide-prevention are still poorly understood. Therefore, structural equation modeling was used to test theory-driven models in 73 CHR-patients...
2017: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/29248027/peripheral-levels-of-superoxide-dismutase-and-glutathione-peroxidase-in-youths-in-ultra-high-risk-for-psychosis-a-pilot-study
#11
Maiara Zeni-Graiff, Adiel C Rios, Pawan K Maurya, Lucas B Rizzo, Sumit Sethi, Ana S Yamagata, Rodrigo B Mansur, Pedro M Pan, Elson Asevedo, Graccielle R Cunha, André Zugman, Rodrigo A Bressan, Ary Gadelha, Elisa Brietzke
Introduction Oxidative stress has been documented in chronic schizophrenia and in the first episode of psychosis, but there are very little data on oxidative stress prior to the disease onset. OBJECTIVE: This work aimed to compare serum levels of superoxide dismutase (SOD) and glutathione peroxidase (GPx) in young individuals at ultra-high risk (UHR) of developing psychosis with a comparison healthy control group (HC). METHODS: Thirteen UHR subjects and 29 age- and sex-matched healthy controls (HC) were enrolled in this study...
December 17, 2017: CNS Spectrums
https://www.readbyqxmd.com/read/29218852/psychotic-conversion-of-individuals-at-ultra-high-risk-for-psychosis-the-potential-roles-of-schizotypy-and-basic-symptoms
#12
Minji Bang, Jin Young Park, Kyung Ran Kim, Su Young Lee, Yun Young Song, Jee In Kang, Eun Lee, Suk Kyoon An
AIM: To improve strategies for the early identification of individuals at a heightened risk for the development of psychosis, we investigated the relationships and interactions between 3 psychosis-proneness dimensions for the development of schizophrenia spectrum psychosis: schizotypy, basic symptoms and the ultra-high risk (UHR) criteria. METHODS: Seventy-seven UHR individuals and 79 healthy controls were assessed for schizotypy and basic symptoms using self-report questionnaires at baseline...
December 8, 2017: Early Intervention in Psychiatry
https://www.readbyqxmd.com/read/29198207/neuroanatomical-changes-in-people-with-high-schizotypy-relationship-to-glutamate-levels
#13
Gemma Modinos, Alice Egerton, Anna McLaughlin, Katrina McMullen, Veena Kumari, David J Lythgoe, Gareth J Barker, André Aleman, Steve C R Williams
BACKGROUND: Cortical glutamatergic dysfunction is thought to be fundamental for psychosis development, and may lead to structural degeneration through excitotoxicity. Glutamate levels have been related to gray matter volume (GMV) alterations in people at ultra-high risk of psychosis, and we previously reported GMV changes in individuals with high schizotypy (HS), which refers to the expression of schizophrenia-like characteristics in healthy people. This study sought to examine whether GMV changes in HS subjects are related to glutamate levels...
December 4, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/29174435/dopamine-in-high-risk-populations-a-comparison-of-subjects-with-22q11-2-deletion-syndrome-and-subjects-at-ultra-high-risk-for-psychosis
#14
Claudia Vingerhoets, Oswald J N Bloemen, Erik Boot, Geor Bakker, Mariken B de Koning, Fabiana da Silva Alves, Jan Booij, Thérèse A M J van Amelsvoort
Striatal dopamine (DA) dysfunction has been consistently reported in psychotic disorders. Differences and similarities in the pathogenesis between populations at clinical and genetic risk for developing psychosis are yet to be established. Here we explored markers of dopamine (DA) function in subjects meeting clinically ultra-high risk criteria for psychosis (UHR) and in subjects with 22q11.2 deletion syndrome (22q11DS), a genetic condition associated with significant risk for developing psychotic disorders...
November 21, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/29164799/suicidal-ideation-in-individuals-at-ultra-high-risk-for-psychosis-and-its-association-with-suspiciousness-independent-of-depression
#15
Minji Bang, Jin Young Park, Kyung Ran Kim, Su Young Lee, Yun Young Song, Jee In Kang, Eun Lee, Suk Kyoon An
AIM: Psychotic experiences, including delusions and hallucinations, and their attenuated forms have been recently suggested as a significant but under-recognized marker of suicide risk. However, the relationship between attenuated positive symptoms and suicide has not yet been clearly demonstrated in individuals at ultra-high risk (UHR) for psychosis. Here, we investigated the effect of attenuated positive symptoms on suicidal ideation in UHR individuals. METHODS: Fifty-three healthy controls (HCs) and 74 UHR individuals participated in the present study...
November 22, 2017: Early Intervention in Psychiatry
https://www.readbyqxmd.com/read/29143980/white-matter-maturation-during-12-months-in-individuals-at-ultra-high-risk-for-psychosis
#16
K Krakauer, M Nordentoft, B Y Glenthøj, J M Raghava, D Nordholm, L Randers, L B Glenthøj, B H Ebdrup, E Rostrup
OBJECTIVE: The neurodevelopmental hypothesis of psychosis suggests that disrupted white matter (WM) maturation underlies disease onset. In this longitudinal study, we investigated WM connectivity and compared WM changes between individuals at ultra-high-risk for psychosis (UHR) and healthy controls (HCs). METHOD: Thirty UHR individuals and 23 HCs underwent MR diffusion tensor imaging before and after 12 months of non-manualized standard care. Positive and negative symptoms and level of functioning were assessed...
November 16, 2017: Acta Psychiatrica Scandinavica
https://www.readbyqxmd.com/read/29132815/impaired-mismatch-negativity-to-frequency-deviants-in-individuals-at-ultra-high-risk-for-psychosis-and-preliminary-evidence-for-further-impairment-with-transition-to-psychosis
#17
Suzie Lavoie, Bradley N Jack, Oren Griffiths, Ayaka Ando, Paul Amminger, Anthony Couroupis, Aidan Jago, Connie Markulev, Patrick D McGorry, Barnaby Nelson, Andrea Polari, Hok Pan Yuen, Thomas J Whitford
BACKGROUND: There is evidence to suggest that people with established psychotic disorders show impairments in the mismatch negativity induced by a frequency-deviant sound (fMMN), and that these impairments worsen with the deterioration of psychotic symptoms. This study aimed to test whether individuals at ultra-high risk (UHR) for psychosis show pre-morbid impairments in fMMN, and if so, whether fMMN continues to deteriorate with transition to psychosis. METHOD: fMMN was recorded in a cohort of UHR individuals (n=42) and compared to healthy controls (n=29)...
November 10, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/29107832/impaired-action-self-monitoring-and-cognitive-confidence-among-ultra-high-risk-for-psychosis-and-first-episode-psychosis-patients
#18
Ł Gawęda, E Li, S Lavoie, T J Whitford, S Moritz, B Nelson
BACKGROUND: Self-monitoring biases and overconfidence in incorrect judgments have been suggested as playing a role in schizophrenia spectrum disorders. Little is known about whether self-monitoring biases may contribute to early risk factors for psychosis. In this study, action self-monitoring (i.e., discrimination between imagined and performed actions) was investigated, along with confidence in judgments among ultra-high risk (UHR) for psychosis individuals and first-episode psychosis (FEP) patients...
September 22, 2017: European Psychiatry: the Journal of the Association of European Psychiatrists
https://www.readbyqxmd.com/read/29081329/treating-sleep-problems-in-young-people-at-ultra-high-risk-of-psychosis-a-feasibility-case-series
#19
Jonathan Bradley, Daniel Freeman, Eleanor Chadwick, Allison G Harvey, Bradley Mullins, Louise Johns, Bryony Sheaves, Belinda Lennox, Matthew Broome, Felicity Waite
BACKGROUND: Our view is that sleep disturbance may be a contributory causal factor in the development and maintenance of psychotic experiences. A recent series of randomized controlled intervention studies has shown that cognitive-behavioural approaches can improve sleep in people with psychotic experiences. However, the effects of psychological intervention for improving sleep have not been evaluated in young people at ultra-high risk of psychosis. Improving sleep might prevent later transition to a mental health disorder...
October 30, 2017: Behavioural and Cognitive Psychotherapy
https://www.readbyqxmd.com/read/29058115/adolescents-at-ultra-high-risk-of-psychosis-in-italian-neuropsychiatry-services-prevalence-psychopathology-and-transition-rate
#20
Lorenzo Pelizza, Silvia Azzali, Sara Garlassi, Federica Paterlini, Ilaria Scazza, Luigi Rocco Chiri, Simona Pupo, Andrea Raballo
Studies in adolescents on ultra-high risk (UHR) and basic symptoms (BS) criteria for psychosis prediction are scarce. In Italy, early interventions in psychosis are less widespread than in other European countries. In the present study, we (1) assessed the clinical relevance of a UHR diagnosis [according to the comprehensive assessment of at-risk mental states (CAARMS) criteria] to promote the implementation of specific services for UHR adolescents into the Italian health care system; (2) described severity of positive, negative, general, and basic symptoms in UHR adolescents compared to adolescents with first-episode psychosis (FEP) and non-UHR adolescents (i...
October 20, 2017: European Child & Adolescent Psychiatry
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