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Genetic OR biological psychiatry

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https://www.readbyqxmd.com/read/28194008/genetic-otx2-mis-localization-delays-critical-period-plasticity-across-brain-regions
#1
H H C Lee, C Bernard, Z Ye, D Acampora, A Simeone, A Prochiantz, A A Di Nardo, T K Hensch
Accumulation of non-cell autonomous Otx2 homeoprotein in postnatal mouse visual cortex (V1) has been implicated in both the onset and closure of critical period (CP) plasticity. Here, we show that a genetic point mutation in the glycosaminoglycan recognition motif of Otx2 broadly delays the maturation of pivotal parvalbumin-positive (PV+) interneurons not only in V1 but also in the primary auditory (A1) and medial prefrontal cortex (mPFC). Consequently, not only visual, but also auditory plasticity is delayed, including the experience-dependent expansion of tonotopic maps in A1 and the acquisition of acoustic preferences in mPFC, which mitigates anxious behavior...
February 14, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28194005/genetic-inhibition-of-neurotransmission-reveals-role-of-glutamatergic-input-to-dopamine-neurons-in-high-effort-behavior
#2
M A Hutchison, X Gu, M F Adrover, M R Lee, T S Hnasko, V A Alvarez, W Lu
Midbrain dopamine neurons are crucial for many behavioral and cognitive functions. As the major excitatory input, glutamatergic afferents are important for control of the activity and plasticity of dopamine neurons. However, the role of glutamatergic input as a whole onto dopamine neurons remains unclear. Here we developed a mouse line in which glutamatergic inputs onto dopamine neurons are specifically impaired, and utilized this genetic model to directly test the role of glutamatergic inputs in dopamine-related functions...
February 14, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28194004/genetic-contributions-to-self-reported-tiredness
#3
V Deary, S P Hagenaars, S E Harris, W D Hill, G Davies, D C M Liewald, A M McIntosh, C R Gale, I J Deary
Self-reported tiredness and low energy, often called fatigue, are associated with poorer physical and mental health. Twin studies have indicated that this has a heritability between 6 and 50%. In the UK Biobank sample (N=108 976), we carried out a genome-wide association study (GWAS) of responses to the question, 'Over the last two weeks, how often have you felt tired or had little energy?' Univariate GCTA-GREML found that the proportion of variance explained by all common single-nucleotide polymorphisms for this tiredness question was 8...
February 14, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28194001/enhancing-vta-cav1-3-l-type-ca-2-channel-activity-promotes-cocaine-and-mood-related-behaviors-via-overlapping-ampa-receptor-mechanisms-in-the-nucleus-accumbens
#4
A Martínez-Rivera, J Hao, T F Tropea, T P Giordano, M Kosovsky, R C Rice, A Lee, R L Huganir, J Striessnig, N A Addy, S Han, A M Rajadhyaksha
Genetic factors significantly influence susceptibility for substance abuse and mood disorders. Rodent studies have begun to elucidate a role of Cav1.3 L-type Ca(2+) channels in neuropsychiatric-related behaviors, such as addictive and depressive-like behaviors. Human studies have also linked the CACNA1D gene, which codes for the Cav1.3 protein, with bipolar disorder. However, the neurocircuitry and the molecular mechanisms underlying the role of Cav1.3 in neuropsychiatric phenotypes are not well established...
February 14, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28193370/-characterisation-of-three-polymorphisms-of-the-tryptophan-hydroxylase-2-gene-in-a-sample-of-colombian-population-with-major-depressive-disorder
#5
Adriana Martínez-Idárraga, Irene Riveros-Barrera, Ricardo Sánchez, Luis Eduardo Jaramillo, José Manuel Calvo-Gómez, Juan José Yunis-Londoño
OBJECTIVE: Identify whether rs11179000, rs136494 and rs4570625 polymorphisms of the tryptophan hydroxylase 2 gene, are associated with a major depressive disorder in a sample of the Colombian population. METHODS: Case-control study was conducted in which a comparison was made between subjects diagnosed with major depressive disorder at some point in adulthood or active symptoms at the time of evaluation, and subjects with no psychiatric disease. Subjects were studied in the Department of Psychiatry, Faculty of Medicine and the Institute of Genetics at the National University of Colombia...
January 2017: Revista Colombiana de Psiquiatría
https://www.readbyqxmd.com/read/28188505/undergraduate-neuroscience-majors-a-missed-opportunity-for-psychiatry-workforce-development
#6
Matthew N Goldenberg, John H Krystal
OBJECTIVE: This study sought to determine whether and to what extent medical students with an undergraduate college major in neuroscience, relative to other college majors, pursue psychiatry relative to other brain-based specialties (neurology and neurosurgery) and internal medicine. METHODS: The authors analyzed data from AAMC matriculation and graduation surveys for all students who graduated from US medical schools in 2013 and 2014 (n = 29,714). Students who majored in neuroscience, psychology, and biology were compared to all other students in terms of their specialty choice at both time points...
February 10, 2017: Academic Psychiatry
https://www.readbyqxmd.com/read/28184309/plans-hopes-and-ideas-for-mental-health
#7
EDITORIAL
John R Ashton
Mental health and the failings of the mental health services are in the spotlight as never before. Nowhere is this more apparent than in the often dire situation with regard to child and adolescent mental health. At the same time, there is a renewed interest in the scope for prevention of mental illness and distress, and in population approaches to mental well-being. It may come as a surprise to some that others have given such serious consideration to strategic approaches to public mental health as long ago as the 1950s...
February 2017: BJPsych Bulletin
https://www.readbyqxmd.com/read/28174595/hla-drb1-03-as-a-possible-common-etiology-of-schizophrenia-graves-disease-and-type-2-diabetes
#8
Aicha Sayeh, Cheker Ben Cheikh, Ali Mardessi, Meriem Mrad, Brahim Nsiri, Abdelaziz Oumaya, Najiba Fekih-Mrissa
BACKGROUND: Autoimmune diseases and schizophrenia share many common features. Association studies confirm a shared genetic association in the human leukocyte antigen (HLA) region between schizophrenia and most autoimmune diseases. To our knowledge, the simultaneous syndromes of Graves' disease (GD) and type 2 diabetes (T2D) in schizophrenia are rare in Tunisia. CASE PRESENTATION: We report a case of a 42-year-old woman admitted to the department of psychiatry for an acute relapse of chronic schizophrenia...
2017: Annals of General Psychiatry
https://www.readbyqxmd.com/read/28167838/glrb-allelic-variation-associated-with-agoraphobic-cognitions-increased-startle-response-and-fear-network-activation-a-potential-neurogenetic-pathway-to-panic-disorder
#9
J Deckert, H Weber, C Villmann, T B Lonsdorf, J Richter, M Andreatta, A Arias-Vasquez, L Hommers, L Kent, C Schartner, S Cichon, C Wolf, N Schaefer, C R von Collenberg, B Wachter, R Blum, D Schümann, R Scharfenort, J Schumacher, A J Forstner, C Baumann, M A Schiele, S Notzon, P Zwanzger, J G E Janzing, T Galesloot, L A Kiemeney, A Gajewska, E Glotzbach-Schoon, A Mühlberger, G Alpers, T Fydrich, L Fehm, A L Gerlach, T Kircher, T Lang, A Ströhle, V Arolt, H-U Wittchen, R Kalisch, C Büchel, A Hamm, M M Nöthen, M Romanos, K Domschke, P Pauli, A Reif
The molecular genetics of panic disorder (PD) with and without agoraphobia (AG) are still largely unknown and progress is hampered by small sample sizes. We therefore performed a genome-wide association study with a dimensional, PD/AG-related anxiety phenotype based on the Agoraphobia Cognition Questionnaire (ACQ) in a sample of 1370 healthy German volunteers of the CRC TRR58 MEGA study wave 1. A genome-wide significant association was found between ACQ and single non-coding nucleotide variants of the GLRB gene (rs78726293, P=3...
February 7, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28167836/autism-associated-dyrk1a-truncation-mutants-impair-neuronal-dendritic-and-spine-growth-and-interfere-with-postnatal-cortical-development
#10
T Dang, W Y Duan, B Yu, D L Tong, C Cheng, Y F Zhang, W Wu, K Ye, W X Zhang, M Wu, B B Wu, Y An, Z L Qiu, B L Wu
Autism is a prevailing neurodevelopmental disorder with a large genetic/genomic component. Recently, the dual-specificity tyrosine-(Y)-phosphorylation-regulated kinase 1 A (DYRK1A) gene was implicated as a risk factor for autism spectrum disorder (ASD). We identified five DYRK1A variants in ASD patients and found that the dose of DYRK1A protein has a crucial role in various aspects of postnatal neural development. Dyrk1a loss of function and gain of function led to defects in dendritic growth, dendritic spine development and radial migration during cortical development...
February 7, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28167616/towards-trans-diagnostic-mechanisms-in-psychiatry-neurobehavioral-profile-of-rats-with-a-loss-of-function-point-mutation-in-the-dopamine-transporter-gene
#11
Valentina Vengeliene, Anton Bespalov, Martin Roßmanith, Sandra Horschitz, Stefan Berger, Ana L Relo, Hamid R Noori, Peggy Schneider, Thomas Enkel, Dusan Bartsch, Miriam Schneider, Berthold Behl, Anita C Hansson, Patrick Schloss, Rainer Spanagel
The Research Domain Criteria (RDoC) matrix has been developed to reorient psychiatric research towards measurable behavioral dimensions and underlying mechanisms. Here we used a new genetic rat model with a loss of function point mutation in the dopamine transporter (DAT) gene (Slc6a3_N157K) to systematically study the RDoC matrix (www.nimh.nih.gov/research-priorities/rdoc/constructs/rdoc-matrix.shtml). First, we examined the impact of the Slc6a3_N157K mutation on monoaminergic signaling. We then performed behavioral tests representing each of the five RDoC domains - negative and positive valence systems, cognitive, social, and in arousal/regulatory systems...
February 6, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/28166481/the-benefits-risks-and-costs-of-privacy-patient-preferences-and-willingness-to-pay
#12
David E Trachtenbarg, Carl Asche, Shweta Ramsahai, Joy Duling, Jinma Ren
OBJECTIVE: Multiple surveys show patients want medical privacy, however, there are costs to maintain privacy. There are also risks if information is not shared. A review of previous surveys found most surveys asked questions about patient's privacy concerns and willingness to share their medical information. We found only one study that asked about sharing medical information for better care and no survey that asked patients about the risk, cost or comparison between medical privacy and privacy in other areas...
February 6, 2017: Current Medical Research and Opinion
https://www.readbyqxmd.com/read/28162776/the-future-of-psychiatry-brain-devices
#13
Jorge Alberto Costa E Silva, Ricardo Ewbank Steffen
Recent advances in deep brain stimulators and brain-machine interfaces have greatly expanded the possibilities of neuroprosthetics and neuromodulation. Together with advances in neuroengineering, nanotechnology, molecular biology and material sciences, it is now possible to address fundamental questions in neuroscience in new, more powerful ways. It is now possible to apply these new technologies in ways that range from augmenting and restoring function to neuromodulation modalities that treat neuropsychiatric disorders...
January 11, 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28158281/is-investigator-background-related-to-outcome-in-head-to-head-trials-of-psychotherapy-and-pharmacotherapy-for-adult-depression-a-systematic-review-and-meta-analysis
#14
Ioana A Cristea, Claudio Gentili, Pietro Pietrini, Pim Cuijpers
BACKGROUND: The influence of factors related to the background of investigators conducting trials comparing psychotherapy and pharmacotherapy has remained largely unstudied. Specializations emphasizing biological determinants of mental disorders, like psychiatry, might favor pharmacotherapy, while others stressing psychosocial factors, like psychology, could promote psychotherapy. Yet financial conflict of interest (COI) could be a confounding factor as authors with a medical specialization might receive more sponsoring from the pharmaceutical industry...
2017: PloS One
https://www.readbyqxmd.com/read/28138115/mania-in-wolfram-s-disease-from-bedside-to-bench
#15
Seshadri Sekhar Chatterjee, Sayantanava Mitra, Salil Kumar Pal
Wolfram syndrome is a relatively unexplored entity in clinical psychiatry. Historically, the discovery of a specific WFS1 gene had generated huge fanfare regarding specific genetic causations of psychiatric disorders. While the initial enthusiasm has faded now, association of Wolfram syndrome with psychiatric illnesses like schizophrenia, psychosis and suicidal behavior still remain important for understanding biological underpinnings of such disorders. We report a case of Wolfram syndrome presenting with multiple manic episodes, discuss possible genetic underpinnings for the affective symptoms and then discuss certain issues regarding management...
February 28, 2017: Clinical Psychopharmacology and Neuroscience: the Official Scientific Journal of the Korean College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28131433/the-effect-of-mindfulness-meditation-training-on-biological-acute-stress-responses-in-generalized-anxiety-disorder
#16
Elizabeth A Hoge, Eric Bui, Sophie A Palitz, Noah R Schwarz, Maryann E Owens, Jennifer M Johnston, Mark H Pollack, Naomi M Simon
Mindfulness-Based interventions have increased in popularity in psychiatry, but the impact of these treatments on disorder-relevant biomarkers would greatly enhance efficacy and mechanistic evidence. If Generalized Anxiety Disorder (GAD) is successfully treated, relevant biomarkers should change, supporting the impact of treatment and suggesting improved resilience to stress. Seventy adults with GAD were randomized to receive either Mindfulness-Based Stress Reduction (MBSR) or an attention control class; before and after, they underwent the Trier Social Stress Test (TSST)...
January 25, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28127931/public-attitudes-towards-psychiatry-and-psychiatric-treatment-at-the-beginning-of-the-21st-century-a-systematic-review-and-meta-analysis-of-population-surveys
#17
Matthias C Angermeyer, Sandra van der Auwera, Mauro G Carta, Georg Schomerus
Public attitudes towards psychiatry are crucial determinants of help-seeking for mental illness. It has been argued that psychiatry as a discipline enjoys low esteem among the public, and a "crisis" of psychiatry has been noted. We conducted a systematic review and meta-analysis of population studies examining public attitudes towards various aspects of psychiatric care. Our search in PubMed, Web of Science, PsychINFO and bibliographies yielded 162 papers based on population surveys conducted since 2000 and published no later than 2015...
February 2017: World Psychiatry: Official Journal of the World Psychiatric Association (WPA)
https://www.readbyqxmd.com/read/28127906/a-network-theory-of-mental-disorders
#18
Denny Borsboom
In recent years, the network approach to psychopathology has been advanced as an alternative way of conceptualizing mental disorders. In this approach, mental disorders arise from direct interactions between symptoms. Although the network approach has led to many novel methodologies and substantive applications, it has not yet been fully articulated as a scientific theory of mental disorders. The present paper aims to develop such a theory, by postulating a limited set of theoretical principles regarding the structure and dynamics of symptom networks...
February 2017: World Psychiatry: Official Journal of the World Psychiatric Association (WPA)
https://www.readbyqxmd.com/read/28121394/symptoms-of-major-depression-their-stability-familiality-and-prediction-by-genetic-temperamental-and-childhood-environmental-risk-factors
#19
Kenneth S Kendler, Steven H Aggen
BACKGROUND: Psychiatry has long sought to develop biological diagnostic subtypes based on symptomatic differences. This effort assumes that symptoms reflect, with good fidelity, underlying etiological processes. We address this question for major depression (MD). METHODS: We examine, in twins from a population-based registry, similarity in symptom endorsement in individuals meeting criteria for last-year MD at separate interview waves and in concordant twin pairs...
January 25, 2017: Depression and Anxiety
https://www.readbyqxmd.com/read/28116236/the-neural-correlates-and-clinical-characteristics-of-psychosis-in-the-frontotemporal-dementia-continuum-and-the-c9orf72-expansion
#20
Emma M Devenney, Ramon Landin-Romero, Muireann Irish, Michael Hornberger, Eneida Mioshi, Glenda M Halliday, Matthew C Kiernan, John R Hodges
OBJECTIVE: This present study aims to address the gap in the literature regarding the severity and underlying neural correlates of psychotic symptoms in frontotemporal dementia with and without the C9orf72 gene expansion. METHODS: Fifty-six patients with behavioural variant frontotemporal dementia (20 with concomitant amyotrophic lateral sclerosis) and 23 healthy controls underwent neuropsychological assessments, detailed clinical interview for assessment of psychosis symptoms, brain MRI and genetic testing...
2017: NeuroImage: Clinical
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