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Biomarkers in Psychiatry

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https://www.readbyqxmd.com/read/28439103/brain-age-predicts-mortality
#1
J H Cole, S J Ritchie, M E Bastin, M C Valdés Hernández, S Muñoz Maniega, N Royle, J Corley, A Pattie, S E Harris, Q Zhang, N R Wray, P Redmond, R E Marioni, J M Starr, S R Cox, J M Wardlaw, D J Sharp, I J Deary
Age-associated disease and disability are placing a growing burden on society. However, ageing does not affect people uniformly. Hence, markers of the underlying biological ageing process are needed to help identify people at increased risk of age-associated physical and cognitive impairments and ultimately, death. Here, we present such a biomarker, 'brain-predicted age', derived using structural neuroimaging. Brain-predicted age was calculated using machine-learning analysis, trained on neuroimaging data from a large healthy reference sample (N=2001), then tested in the Lothian Birth Cohort 1936 (N=669), to determine relationships with age-associated functional measures and mortality...
April 25, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28403846/the-new-field-of-precision-psychiatry
#2
Brisa S Fernandes, Leanne M Williams, Johann Steiner, Marion Leboyer, André F Carvalho, Michael Berk
BACKGROUND: Precision medicine is a new and important topic in psychiatry. Psychiatry has not yet benefited from the advanced diagnostic and therapeutic technologies that form an integral part of other clinical specialties. Thus, the vision of precision medicine as applied to psychiatry - 'precision psychiatry' - promises to be even more transformative than in other fields of medicine, which have already lessened the translational gap. DISCUSSION: Herein, we describe 'precision psychiatry' and how its several implications promise to transform the psychiatric landscape...
April 13, 2017: BMC Medicine
https://www.readbyqxmd.com/read/28358316/theranostic-biomarkers-for-schizophrenia
#3
REVIEW
Matea Nikolac Perkovic, Gordana Nedic Erjavec, Dubravka Svob Strac, Suzana Uzun, Oliver Kozumplik, Nela Pivac
Schizophrenia is a highly heritable, chronic, severe, disabling neurodevelopmental brain disorder with a heterogeneous genetic and neurobiological background, which is still poorly understood. To allow better diagnostic procedures and therapeutic strategies in schizophrenia patients, use of easy accessible biomarkers is suggested. The most frequently used biomarkers in schizophrenia are those associated with the neuroimmune and neuroendocrine system, metabolism, different neurotransmitter systems and neurotrophic factors...
March 30, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28353229/the-utility-of-multiplex-assays-for-identification-of-proteomic-signatures-in-psychiatry
#4
Junfang Chen, Paul C Guest, Emanuel Schwarz
As substantial efforts are being made to identify biological markers of psychiatric illnesses, it is becoming clear that clinically useful accuracy will require larger sets of readouts that potentially span different technological platforms. For discovery of proteomic biomarkers, simultaneous measurement of analytes in small sample quantities has developed into a widely used technology of similar quality as the respective single-plex assays. Multiplex assay systems therefore hold promise for biomarker discovery and development in many complex disease areas including psychiatry...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28344933/precision-medicine-the-golden-gate-for-detection-treatment-and-prevention-of-alzheimer-s-disease
#5
H Hampel, S E O'Bryant, J I Castrillo, C Ritchie, K Rojkova, K Broich, N Benda, R Nisticò, R A Frank, B Dubois, V Escott-Price, S Lista
During this decade, breakthrough conceptual shifts have commenced to emerge in the field of Alzheimer's disease (AD) recognizing risk factors and the non-linear dynamic continuum of complex pathophysiologies amongst a wide dimensional spectrum of multi-factorial brain proteinopathies/neurodegenerative diseases. As is the case in most fields of medicine, substantial advancements in detecting, treating and preventing AD will likely evolve from the generation and implementation of a systematic precision medicine strategy...
December 2016: Journal of Prevention of Alzheimer's Disease
https://www.readbyqxmd.com/read/28286989/a-precision-medicine-initiative-for-alzheimer-s-disease-the-road-ahead-to-biomarker-guided-integrative-disease-modeling
#6
REVIEW
H Hampel, S E O'Bryant, S Durrleman, E Younesi, K Rojkova, V Escott-Price, J-C Corvol, K Broich, B Dubois, S Lista
After intense scientific exploration and more than a decade of failed trials, Alzheimer's disease (AD) remains a fatal global epidemic. A traditional research and drug development paradigm continues to target heterogeneous late-stage clinically phenotyped patients with single 'magic bullet' drugs. Here, we propose that it is time for a paradigm shift towards the implementation of precision medicine (PM) for enhanced risk screening, detection, treatment, and prevention of AD. The overarching structure of how PM for AD can be achieved will be provided through the convergence of breakthrough technological advances, including big data science, systems biology, genomic sequencing, blood-based biomarkers, integrated disease modeling and P4 medicine...
April 2017: Climacteric: the Journal of the International Menopause Society
https://www.readbyqxmd.com/read/28282077/-endophenotypes-in-psychiatry
#7
Salvador M Guinjoan
We review the concept of endophenotype, and its relationship with related terms in use in the scientific literature, including "biomarker" and "intermediate phenotype". We then explain the importance of the concept in current psychiatry research. Specifically, we focus in the potential importance of endophenotypes in both disentangling the genetic causes, and improving the dimensional and pathophysiologic definition, of psychiatric nosological categories. After delineating which types of variables could constitute valid endophenotypes, we describe efforts in defining neurobiological signatures of social cognitive deficits in schizophrenia as an example with potential heuristic value...
September 2016: Vertex: Revista Argentina de Psiquiatriá
https://www.readbyqxmd.com/read/28236993/-what-role-for-paraclinical-investigations-within-clinical-trials-conducted-in-psychiatric-patients
#8
A Kaladjian, M Adida, N Simon, R Belzeaux, O Blin, E Fakra, J-M Azorin
As in the usual care of patients, paraclinical investigations have today only a very modest role in clinical trials in psychiatry, mainly to complete the pre-therapeutical assessments prior to inclusion of subjects or to monitor treatment tolerance. Yet, the accumulation of data in neurosciences suggests the next emergence of biomarkers, whose interest is that they are closely associated to the biological disturbances underlying psychiatric illnesses, and that they are accessible by means of technological tools such as imaging devices...
December 2016: L'Encéphale
https://www.readbyqxmd.com/read/28236988/-what-can-we-expect-from-clinical-trials-in-psychiatry
#9
A Marsot, Q Boucherie, F Kheloufi, C Riff, D Braunstein, J Dupouey, R Guilhaumou, X Zendjidjian, S Bonin-Guillaume, E Fakra, M Guye, V Jirsa, J-M Azorin, R Belzeaux, M Adida, J Micallef, O Blin
Clinical trials in psychiatry allow to build the regulatory dossiers for market authorization but also to document the mechanism of action of new drugs, to build pharmacodynamics models, evaluate the treatment effects, propose prognosis, efficacy or tolerability biomarkers and altogether to assess the impact of drugs for patient, caregiver and society. However, clinical trials have shown some limitations. Number of recent dossiers failed to convince the regulators. The clinical and biological heterogeneity of psychiatric disorders, the pharmacokinetic and pharmacodynamics properties of the compounds, the lack of translatable biomarkers possibly explain these difficulties...
December 2016: L'Encéphale
https://www.readbyqxmd.com/read/28131433/the-effect-of-mindfulness-meditation-training-on-biological-acute-stress-responses-in-generalized-anxiety-disorder
#10
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/28130814/serum-tumour-necrosis-factor-%C3%AE-and-interleukin-6-levels-in-alzheimer-s-disease-and-mild-cognitive-impairment
#11
Yo Sup Kim, Kang Joon Lee, Hyun Kim
BACKGROUND: Neuroinflammation has been recognized as a feature of Alzheimer's disease (AD), and mild cognitive impairment (MCI) is believed to share several pathological features with AD. The aim of the present study was to compare serum cytokine levels between patients with AD, subjects with MCI, and healthy controls, and to assess the correlation between cytokine levels and cognitive performance in these subjects. METHODS: Participants included 35 patients with AD, 29 subjects with MCI, and 28 healthy controls from the Department of Psychiatry of IIlsan Paik Hospital in South Korea...
January 28, 2017: Psychogeriatrics: the Official Journal of the Japanese Psychogeriatric Society
https://www.readbyqxmd.com/read/28115739/genome-wide-association-study-of-therapeutic-opioid-dosing-identifies-a-novel-locus-upstream-of-oprm1
#12
A H Smith, K P Jensen, J Li, Y Nunez, L A Farrer, H Hakonarson, S D Cook-Sather, H R Kranzler, J Gelernter
Opioids are very effective analgesics, but they are also highly addictive. Methadone is used to treat opioid dependence (OD), acting as a selective agonist at the μ-opioid receptor encoded by the gene OPRM1. Determining the optimal methadone maintenance dose is time consuming; currently, no biomarkers are available to guide treatment. In methadone-treated OD subjects drawn from a case and control sample, we conducted a genome-wide association study of usual daily methadone dose. In African-American (AA) OD subjects (n=383), we identified a genome-wide significant association between therapeutic methadone dose (mean=68...
March 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28093569/translational-evaluation-of-translocator-protein-as-a-marker-of-neuroinflammation-in-schizophrenia
#13
T Notter, J M Coughlin, T Gschwind, U Weber-Stadlbauer, Y Wang, M Kassiou, A C Vernon, D Benke, M G Pomper, A Sawa, U Meyer
Positron emission tomography (PET) imaging with radiotracers that target translocator protein 18 kDa (TSPO) has become a popular approach to assess putative neuroinflammatory processes and associated microglia activation in psychotic illnesses. It remains unclear, however, whether TSPO imaging can accurately capture low-grade inflammatory processes such as those present in schizophrenia and related disorders. Therefore, we evaluated the validity of TSPO as a disease-relevant marker of inflammation using a translational approach, which combined neurodevelopmental and neurodegenerative mouse models with PET imaging in patients with recent-onset schizophrenia and matched controls...
January 17, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28093567/beta-amyloid-sequelae-in-the-eye-a-critical-review-on-its-diagnostic-significance-and-clinical-relevance-in-alzheimer-s-disease
#14
REVIEW
T M Shah, S M Gupta, P Chatterjee, M Campbell, R N Martins
Alzheimer's disease (AD) is a progressive and fatal neurodegenerative disorder. There is no test for its definitive diagnosis in routine clinical practice. Although phase III clinical trials have failed, only symptomatic treatment is currently available; a possible reason for these failed trials is that intervention commenced at an advanced stage of the disease. The hallmarks of an AD brain include plaques comprising of extracellular beta-amyloid (Aβ) protein aggregates and intracellular hyperphosphorylated neurofibrillary tangles of tau...
March 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28064175/neuroimaging-of-inflammation-in-memory-and-related-other-disorders-nimrod-study-protocol-a-deep-phenotyping-cohort-study-of-the-role-of-brain-inflammation-in-dementia-depression-and-other-neurological-illnesses
#15
W Richard Bevan-Jones, Ajenthan Surendranathan, Luca Passamonti, Patricia Vázquez Rodríguez, Robert Arnold, Elijah Mak, Li Su, Jonathan P Coles, Tim D Fryer, Young T Hong, Guy Williams, Franklin Aigbirhio, James B Rowe, John T O'Brien
INTRODUCTION: Inflammation of the central nervous system is increasingly regarded as having a role in cognitive disorders such as dementia and depression, but it is not clear how such inflammation relates to other aspects of neuropathology, structural and functional changes in the brain and symptoms (as assessed via clinical and neuropsychological assessment and MRI). This study will explore these pathophysiological mechanisms using positron emission tomography (PET) which allows in vivo imaging of inflammation, amyloid and τ deposition, together with neuropsychological profiling, MRI and peripheral biomarker analysis...
January 7, 2017: BMJ Open
https://www.readbyqxmd.com/read/28049075/abnormal-brain-oscillations-persist-after-recovery-from-bipolar-depression
#16
P Canali, S Casarotto, M Rosanova, G Sferrazza-Papa, A G Casali, O Gosseries, M Massimini, E Smeraldi, C Colombo, F Benedetti
When directly perturbed in healthy subjects, premotor cortical areas generate electrical oscillations in the beta range (20-40Hz). In schizophrenia, major depressive disorder and bipolar disorder (BD), these oscillations are markedly reduced, in terms of amplitude and frequency. However, it still remains unclear whether these abnormalities can be modulated over time, or if they can be still observed after treatment. Here, we employed transcranial magnetic stimulation (TMS) combined with EEG to assess the frontal oscillatory activity in eighteen BD patients before/after antidepressant treatments (sleep deprivation and light therapy), relative to nine healthy controls...
March 2017: European Psychiatry: the Journal of the Association of European Psychiatrists
https://www.readbyqxmd.com/read/28032396/computational-neuroscience-approach-to-biomarkers-and-treatments-for-mental-disorders
#17
Noriaki Yahata, Kiyoto Kasai, Mitsuo Kawato
Psychiatry research has long experienced a stagnation stemming from a lack of understanding of the neurobiological underpinnings of phenomenologically defined mental disorders. Recently, the application of computational neuroscience to psychiatry research has shown great promise in establishing a link between phenomenological and pathophysiological aspects of mental disorders, thereby recasting current nosology in more biologically meaningful dimensions. In this review, we highlight recent investigations into computational neuroscience that have undertaken either theory- or data-driven approaches to quantitatively delineate the mechanisms of mental disorders...
December 29, 2016: Psychiatry and Clinical Neurosciences
https://www.readbyqxmd.com/read/28025607/tonsillectomy-remains-a-questionable-option-for-pediatric-autoimmune-neuropsychiatric-disorders-associated-with-streptococcal-infections-pandas
#18
REVIEW
Jochen P Windfuhr
Background: Pediatric autoimmune neuropsychiatric disorders associated with streptococcal infections (PANDAS) is a disease attributed to children with obsessive compulsive disorders (OCD) or tic disorders associated with streptococcal infections. Because otolaryngologists examine a large number of pediatric patients with recurrent streptococcal infections, tonsillectomy (TE) is a common option of therapy. This study was conducted to evaluate the efficacy of TE in patients presenting with verified PANDAS. Material and methods: A PubMed review was performed using search terms "tonsillectomy" and "PANDAS", "OCD", "compulsive" "pediatric autoimmune", "chorea" and "tic" limited by publication date of January 1, 1995, to July 31, 2015...
2016: GMS Current Topics in Otorhinolaryngology, Head and Neck Surgery
https://www.readbyqxmd.com/read/28009246/locating-risk-in-the-adolescent-brain-ethical-challenges-in-the-use-of-biomarkers-for-adolescent-health-and-social-policy
#19
Suparna Choudhury, Sheehan Moore
Technological developments in neuroscience over the last 20 years have generated excitement about the potential of neuroscientific insights for the understanding of and intervention in children's and adolescents' behavior. This article introduces some ways in which new results from developmental cognitive neuroscience have been appropriated in the context of adolescent mental health. We also consider social and interpersonal factors that drive the use of neurobiological markers of mental disorders in pediatric psychiatry...
December 1, 2016: AMA Journal of Ethics
https://www.readbyqxmd.com/read/27990322/recent-advances-and-controversies-in-peripartum-depression
#20
Jennifer L Payne
PURPOSE OF REVIEW: The purpose of this review is to update readers on recent controversies and findings on the underlying biology and clinical management of peripartum depression. RECENT FINDINGS: Topics discussed include the discovery and replication of two epigenetic biomarkers of peripartum depression, two well controlled studies that do NOT find associations between in utero antidepressant exposure and cardiac defects and persistent pulmonary hypertension of the newborn and ongoing controversy on whether antidepressant use during pregnancy prevents peripartum depression and whether or not hormonal treatments have a place in the management of postpartum depression...
September 2016: Current Obstetrics and Gynecology Reports
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