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Vajagathali M, Ramakrishnan V. Genetic predisposition of BDNF (rs6265) gene is susceptible to Schizophrenia: A prospective study and updated meta-analysis. Neurologia 2024; 39:361-371. [PMID: 38616064 DOI: 10.1016/j.nrleng.2024.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 10/28/2021] [Indexed: 04/16/2024] Open
Abstract
INTRODUCTION Genetic polymorphism in the BDNF gene has been found to cause neuronal alterations and has been identified as a causal factor for many neuropsychiatric disorders. Therefore, various neurological case-control studies and meta-analyses have been conducted to find the possible link between BDNF and susceptibility to schizophrenia. METHOD This meta-analysis gathered data from 25 case-control studies including a total of 8384 patients with schizophrenia and 8821 controls in order to identify the relationship between the rs6265 single nucleotide polymorphism and the disease, evaluating the combined odds ratio and 95% confidence intervals under 5 different genetic models. Validation followed the "Leave one out" method, and we used the Egger test and Begg's funnel plot to identify publication bias. RESULTS Research into the rs6265 (G/A) polymorphism revealed a non-significant association with schizophrenia in all 5 genetic models; in the subgroup analysis, no association was found between white and Asian populations, with a p value>.05. CONCLUSIONS Overall, the updated meta-analysis revealed that rs6265 exonic polymorphisms do not increase susceptibility to this disease. However, to better understand the pathogenesis of the disease, there is a need for further case-control studies into the BDNF polymorphism including larger sample sizes and different ethnic groups.
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Affiliation(s)
- M Vajagathali
- Human Cytogenetics and Genomics Laboratory, Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam 603103, Tamilnadu, India
| | - V Ramakrishnan
- Human Cytogenetics and Genomics Laboratory, Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam 603103, Tamilnadu, India.
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Bonetti L, Bruzzone S, Paunio T, Kantojärvi K, Kliuchko M, Vuust P, Palva S, Brattico E. Moderate associations between BDNF Val66Met gene polymorphism, musical expertise, and mismatch negativity. Heliyon 2023; 9:e15600. [PMID: 37153429 PMCID: PMC10160759 DOI: 10.1016/j.heliyon.2023.e15600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 03/31/2023] [Accepted: 04/17/2023] [Indexed: 05/09/2023] Open
Abstract
Auditory predictive processing relies on a complex interaction between environmental, neurophysiological, and genetic factors. In this view, the mismatch negativity (MMN) and intensive training on a musical instrument for several years have been used for studying environment-driven neural adaptations in audition. In addition, brain-derived neurotrophic factor (BDNF) has been shown crucial for both the neurogenesis and the later adaptation of the auditory system. The functional single-nucleotide polymorphism (SNP) Val66Met (rs6265) in the BDNF gene can affect BDNF protein levels, which are involved in neurobiological and neurophysiological processes such as neurogenesis and neuronal plasticity. In this study, we hypothesised that genetic variation within the BDNF gene would be associated with different levels of neuroplasticity of the auditory cortex in 74 musically trained participants. To achieve this goal, musicians and non-musicians were recruited and divided in Val/Val and Met- (Val/Met and Met/Met) carriers and their brain activity was measured with magnetoencephalography (MEG) while they listened to a regular auditory sequence eliciting different types of prediction errors. MMN responses indexing those prediction errors were overall enhanced in Val/Val carriers who underwent intensive musical training, compared to Met-carriers and non-musicians with either genotype. Although this study calls for replications with larger samples, our results provide a first glimpse of the possible role of gene-regulated neurotrophic factors in the neural adaptations of automatic predictive processing in the auditory domain after long-term training.
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Affiliation(s)
- L. Bonetti
- Center for Music in the Brain, Department of Clinical Medicine, Aarhus University & the Royal Academy of Music Aarhus/Aalborg, Denmark
- Centre for Eudaimonia and Human Flourishing, Linacre College, University of Oxford, UK
- Department of Psychiatry, University of Oxford, Oxford, United Kingdom
- Department of Psychology, University of Bologna, Italy
- Corresponding author. Center for Music in the Brain, Department of Clinical Medicine, Aarhus University & the Royal Academy of Music Aarhus/Aalborg, Denmark, and Centre for Eudaimonia and Human Flourishing, Linacre College, University of Oxford, UK.
| | - S.E.P. Bruzzone
- Center for Music in the Brain, Department of Clinical Medicine, Aarhus University & the Royal Academy of Music Aarhus/Aalborg, Denmark
- Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - T. Paunio
- Department of Psychiatry, University of Helsinki, Finland
| | - K. Kantojärvi
- Department of Psychiatry, University of Helsinki, Finland
| | - M. Kliuchko
- Hearing Systems Section, Department of Health Technology, Technical University of Denmark, DK-2800, Kgs. Lyngby, Denmark
| | - P. Vuust
- Center for Music in the Brain, Department of Clinical Medicine, Aarhus University & the Royal Academy of Music Aarhus/Aalborg, Denmark
| | - S. Palva
- Helsinki Institute of Life Sciences, Neuroscience Center, University of Helsinki, Finland
- Centre for Cognitive Neuroscience, School of Neuroscience and Psychology, University of Glasgow, United Kingdom
| | - E. Brattico
- Center for Music in the Brain, Department of Clinical Medicine, Aarhus University & the Royal Academy of Music Aarhus/Aalborg, Denmark
- Department of Education, Psychology, Communication, University of Bari Aldo Moro, Italy
- Corresponding author. Center for Music in the Brain, Department of Clinical Medicine, Aarhus University & the Royal Academy of Music Aarhus/Aalborg, Denmark.
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Murillo-García N, Barrio-Martínez S, Setién-Suero E, Soler J, Papiol S, Fatjó-Vilas M, Ayesa-Arriola R. Overlap between genetic variants associated with schizophrenia spectrum disorders and intelligence quotient: a systematic review. J Psychiatry Neurosci 2022; 47:E393-E408. [PMID: 36414327 PMCID: PMC9710545 DOI: 10.1503/jpn.220026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 06/27/2022] [Accepted: 09/06/2022] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND To study whether there is genetic overlap underlying the risk for schizophrenia spectrum disorders (SSDs) and low intelligence quotient (IQ), we reviewed and summarized the evidence on genetic variants associated with both traits. METHODS We performed this review in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) and preregistered it in PROSPERO. We searched the Medline databases via PubMed, PsycInfo, Web of Science and Scopus. We included studies in adults with a diagnosis of SSD that explored genetic variants (single nucleotide polymorphisms [SNPs], copy number variants [CNVs], genomic insertions or genomic deletions), estimated IQ and studied the relationship between genetic variability and both traits (SSD and IQ). We synthesized the results and assessed risk of bias using the Quality of Genetic Association Studies (Q-Genie) tool. RESULTS Fifty-five studies met the inclusion criteria (45 case-control, 9 cross-sectional, 1 cohort), of which 55% reported significant associations for genetic variants involved in IQ and SSD. The SNPs more frequently explored through candidate gene studies were in COMT, DTNBP1, BDNF and TCF4. Through genome-wide association studies, 2 SNPs in CHD7 and GATAD2A were associated with IQ in patients with SSD. The studies on CNVs suggested significant associations between structural variants and low IQ in patients with SSD. LIMITATIONS Overall, primary studies used heterogeneous IQ measurement tools and had small samples. Grey literature was not screened. CONCLUSION Genetic overlap between SSD and IQ supports the neurodevelopmental hypothesis of schizophrenia. Most of the risk polymorphisms identified were in genes relevant to brain development, neural proliferation and differentiation, and synaptic plasticity.
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Affiliation(s)
| | | | | | | | | | | | - Rosa Ayesa-Arriola
- From the Research Unit in Mental Illness, Valdecilla Biomedical Research Institute, Santander, Cantabria, Spain (Murillo-García, Barrio-Martínez, Ayesa-Arriola); the Department of Molecular Biology, Faculty of Medicine, University of Cantabria, Santander, Cantabria, Spain (Murillo-García, Ayesa-Arriola); the Faculty of Psychology, University Complutense of Madrid, Madrid, Spain (Barrio-Martínez); the Department of Psychology, Faculty of Health Sciences, University of Deusto, Bilbao, Basque Country, Spain (Setién-Suero); the Biomedical Research Networking Center for Mental Health (CIBERSAM), Madrid, Madrid, Spain (Soler, Papiol, Fatjó-Vilas, Ayesa-Arriola); the Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain (Soler, Fatjó-Vilas); the Institut de Biomedicina de la Universitat de Barcelona, Universitat de Barcelona, Barcelona, Spain (Soler); the Institute of Psychiatric Phenomics and Genomics, University Hospital, LMU Munich, Munich, Germany (Papiol); the Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Munich, Germany (Papiol); the FIDMAG Sisters Hospitallers Research Foundation, Sant Boi de Llobregat, Barcelona, Spain (Fatjó-Vilas)
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Vouga Ribeiro N, Tavares V, Bramon E, Toulopoulou T, Valli I, Shergill S, Murray R, Prata D. Effects of psychosis-associated genetic markers on brain volumetry: a systematic review of replicated findings and an independent validation. Psychol Med 2022; 52:1-16. [PMID: 36168994 PMCID: PMC9811278 DOI: 10.1017/s0033291722002896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 08/13/2022] [Accepted: 08/24/2022] [Indexed: 01/12/2023]
Abstract
BACKGROUND Given psychotic illnesses' high heritability and associations with brain structure, numerous neuroimaging-genetics findings have been reported in the last two decades. However, few findings have been replicated. In the present independent sample we aimed to replicate any psychosis-implicated SNPs (single nucleotide polymorphisms), which had previously shown at least two main effects on brain volume. METHODS A systematic review for SNPs showing a replicated effect on brain volume yielded 25 studies implicating seven SNPs in five genes. Their effect was then tested in 113 subjects with either schizophrenia, bipolar disorder, 'at risk mental state' or healthy state, for whole-brain and region-of-interest (ROI) associations with grey and white matter volume changes, using voxel-based morphometry. RESULTS We found FWER-corrected (Family-wise error rate) (i.e. statistically significant) associations of: (1) CACNA1C-rs769087-A with larger bilateral hippocampus and thalamus white matter, across the whole brain; and (2) CACNA1C-rs769087-A with larger superior frontal gyrus, as ROI. Higher replication concordance with existing literature was found, in decreasing order, for: (1) CACNA1C-rs769087-A, with larger dorsolateral-prefrontal/superior frontal gyrus and hippocampi (both with anatomical and directional concordance); (2) ZNF804A-rs11681373-A, with smaller angular gyrus grey matter and rectus gyri white matter (both with anatomical and directional concordance); and (3) BDNF-rs6265-T with superior frontal and middle cingulate gyri volume change (with anatomical and allelic concordance). CONCLUSIONS Most literature findings were not herein replicated. Nevertheless, high degree/likelihood of replication was found for two genome-wide association studies- and one candidate-implicated SNPs, supporting their involvement in psychosis and brain structure.
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Affiliation(s)
- Nuno Vouga Ribeiro
- Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal
- Instituto de Biofísica e Engenharia Biomédica, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
| | - Vânia Tavares
- Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal
- Instituto de Biofísica e Engenharia Biomédica, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
| | - Elvira Bramon
- Division of Psychiatry, University College London, London, UK
- Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King’ College London, London, UK
- Institute of Cognitive Neuroscience, University College London, London, UK
| | - Timothea Toulopoulou
- Department of Psychology & National Magnetic Resonance Research Center (UMRAM), Aysel Sabuncu Brain Research Centre (ASBAM), Bilkent University, Ankara, Turkey
| | - Isabel Valli
- Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King’ College London, London, UK
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - Sukhi Shergill
- Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King’ College London, London, UK
| | - Robin Murray
- Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King’ College London, London, UK
| | - Diana Prata
- Instituto de Biofísica e Engenharia Biomédica, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
- Department of Old Age Psychiatry, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, UK
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Eum S, Hill SK, Bishop JR. Considering medication exposure in genomic association studies of cognition in psychotic disorders. Pharmacogenomics 2022; 23:791-806. [PMID: 36102182 DOI: 10.2217/pgs-2022-0070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Cognitive dysfunction is a core feature of psychosis-spectrum illnesses, and the characterization of related genetic mechanisms may provide insights regarding the disease pathophysiology. Substantial efforts have been made to determine the genetic component of cognitive symptoms, without clear success. Illness-related moderators and environmental factors such as medications hinder the detection of genomic association with cognition. Polypharmacy is common in psychotic disorders, and the cumulative effects of medication regimens can confound gene-cognition associations. A review of the relative contributions of important pharmacological and genetic relationships identifies that the effects of medications on cognition in psychotic disorders may be at least, if not more, impactful than individual genes, thus underscoring the importance of accounting for medication exposure in gene-cognition association studies.
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Affiliation(s)
- Seenae Eum
- Department of Pharmacogenomics, School of Pharmacy, Shenandoah University, Fairfax, VA 22031, USA
| | - Scot Kristian Hill
- Department of Psychology, Rosalind Franklin University of Medicine & Science, North Chicago, IL 60064, USA
| | - Jeffrey R Bishop
- Department of Experimental & Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN 55455, USA.,Department of Psychiatry & Behavioral Sciences, University of Minnesota Medical School, Minneapolis, MN 55455, USA
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Cha E, Ahn HJ, Kang W, Jung KI, Ohn SH, Bashir S, Yoo WK. Correlations between COMT polymorphism and brain structure and cognition in elderly subjects: An observational study. Medicine (Baltimore) 2022; 101:e29214. [PMID: 35550471 PMCID: PMC9276462 DOI: 10.1097/md.0000000000029214] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 03/14/2022] [Indexed: 01/04/2023] Open
Abstract
The catechol-O-methyltransferase (COMT) gene has been noted to play an important role in individual variations in the aging process. We investigated whether COMT polymorphism could influence cognition related to white matter networks. More specifically, we examined whether methionine (Met) allele loading is associated with better individual cognitive performance. Thirty-four healthy elderly participants were recruited; each participant's COMT genotype was determined, and Korean version of Montreal Cognitive Assessment scores and a diffusion tensor image were obtained for all participants. The Met carrier group showed significantly lower mean diffusivity, axial diffusivity, and radial diffusivity values for the right hippocampus, thalamus, uncinate fasciculus, and left caudate nucleus than the valine homozygote group. The Met carrier group also scored higher for executive function and attention on the Korean version of Montreal Cognitive Assessment. Based on these results, we can assume that the COMT Met allele has a protective effect on cognitive decline contributing to individual differences in cognitive function in late life period.
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Affiliation(s)
- Eunsil Cha
- Department of Physical Medicine and Rehabilitation, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Republic of Korea
| | - Hyun Jung Ahn
- Hallym Institute of Translational Genomics & Bioinformatics, Hallym University Sacred Heart Hospital, Anyang, Republic of Korea
| | - Wonil Kang
- Department of Physical Medicine and Rehabilitation, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Republic of Korea
| | - Kwang-Ik Jung
- Department of Physical Medicine and Rehabilitation, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Republic of Korea
| | - Suk Hoon Ohn
- Department of Physical Medicine and Rehabilitation, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Republic of Korea
| | - Shahid Bashir
- Neuroscience Center, King Fahad Specialist Hospital Dammam, Dammam, Saudi Arabia
| | - Woo-Kyoung Yoo
- Department of Physical Medicine and Rehabilitation, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Republic of Korea
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Kennedy KG, Shahatit Z, Dimick MK, Fiksenbaum L, Freeman N, Zai CC, Kennedy JL, MacIntosh BJ, Goldstein BI. Neurostructural correlates of BDNF rs6265 genotype in youth bipolar disorder. Bipolar Disord 2022; 24:185-194. [PMID: 34263997 DOI: 10.1111/bdi.13116] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 05/20/2021] [Accepted: 07/02/2021] [Indexed: 11/30/2022]
Abstract
OBJECTIVE Brain-derived neurotrophic factor (BDNF) rs6265 single-nucleotide polymorphism has been associated with bipolar disorder (BD), and with brain structure among adults with BD. We set out to investigate the association of the BDNF rs6265 Met allele with neurostructural phenotypes in youth BD. METHODS Caucasian youth (N = 99; 13-20 years; n = 56 BD, n = 43 age and sex-matched healthy controls) underwent 3-Tesla Magnetic Resonance Imaging and genotyping for BDNF rs6265. Region of interest (ROI) analyses of the ventromedial prefrontal cortex (vmPFC), anterior cingulate cortex (ACC), and hippocampus were complemented by vertex-wise analyses examining cortical thickness, surface area (SA) and volume. Multivariable models included the main effects of diagnosis and gene, and a diagnosis-by-genotype interaction term, controlling for age, sex, and intracranial volume. RESULTS There were no significant gene main effects or diagnosis-by-gene interaction effects in ROI analyses. The vertex-wise analysis yielded a significant gene main effect whereby Met allele carriers had greater middle temporal gyrus SA (p = 0.001) and supramarginal gyrus volume (p = 0.03) than Val/Val individuals. Significant interaction effects were found on lateral occipital lobe SA (p = 0.03), whereby the Met allele was associated with increased SA in BD only. Interaction effects were also found on postcentral gyrus SA (p = 0.049) and supramarginal gyrus SA (p = 0.04), with smaller SA in BD Met carriers versus healthy control Met carriers. CONCLUSION These findings suggest that BDNF rs6265 is differentially associated with regional SA in youth BD. Further investigation is warranted to evaluate whether BDNF protein levels mediate the observed effects, and to evaluate rs6265-related developmental changes.
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Affiliation(s)
- Kody G Kennedy
- Centre for Youth Bipolar Disorder, Centre for Addiction and Mental Health, Toronto, ON, Canada.,Department of Pharmacology, University of Toronto, Toronto, ON, Canada
| | - Zaid Shahatit
- Centre for Youth Bipolar Disorder, Centre for Addiction and Mental Health, Toronto, ON, Canada.,Department of Pharmacology, University of Toronto, Toronto, ON, Canada
| | - Mikaela K Dimick
- Centre for Youth Bipolar Disorder, Centre for Addiction and Mental Health, Toronto, ON, Canada.,Department of Pharmacology, University of Toronto, Toronto, ON, Canada
| | - Lisa Fiksenbaum
- Department of Psychiatry, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - Natalie Freeman
- Psychiatric Neurogenetics Section, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, ON, Canada
| | - Clement C Zai
- Psychiatric Neurogenetics Section, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, ON, Canada.,Department of Psychiatry, University of Toronto, Toronto, ON, Canada
| | - James L Kennedy
- Psychiatric Neurogenetics Section, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, ON, Canada.,Department of Psychiatry, University of Toronto, Toronto, ON, Canada
| | - Bradley J MacIntosh
- Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada.,Heart and Stroke Foundation Canadian Partnership for Stroke Recovery, Sunnybrook Research Institute, Toronto, ON, Canada
| | - Benjamin I Goldstein
- Centre for Youth Bipolar Disorder, Centre for Addiction and Mental Health, Toronto, ON, Canada.,Department of Pharmacology, University of Toronto, Toronto, ON, Canada.,Department of Psychiatry, University of Toronto, Toronto, ON, Canada
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Vajagathali M, Ramakrishnan V. Genetic predisposition of BDNF (rs6265) gene is susceptible to Schizophrenia: A prospective study and updated meta-analysis. Neurologia 2022. [DOI: 10.1016/j.nrl.2021.10.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Kristinsson S, Fridriksson J. Genetics in aphasia recovery. HANDBOOK OF CLINICAL NEUROLOGY 2022; 185:283-296. [PMID: 35078606 DOI: 10.1016/b978-0-12-823384-9.00015-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Considerable research efforts have been exerted toward understanding the mechanisms underlying recovery in aphasia. However, predictive models of spontaneous and treatment-induced recovery remain imprecise. Some of the hitherto unexplained variability in recovery may be accounted for with genetic data. A few studies have examined the effects of the BDNF val66met polymorphism on aphasia recovery, yielding mixed results. Advances in the study of stroke genetics and genetics of stroke recovery, including identification of several susceptibility genes through candidate-gene or genome-wide association studies, may have implications for the recovery of language function. The current chapter discusses both the direct and indirect evidence for a genetic basis of aphasia recovery, the implications of recent findings within the field, and potential future directions to advance understanding of the genetics-recovery associations.
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Affiliation(s)
- Sigfus Kristinsson
- Department of Communication Sciences and Disorders, University of South Carolina, Columbia, SC, United States
| | - Julius Fridriksson
- Department of Communication Sciences and Disorders, University of South Carolina, Columbia, SC, United States.
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10
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Sasaki R, Kojima S, Onishi H. Do Brain-Derived Neurotrophic Factor Genetic Polymorphisms Modulate the Efficacy of Motor Cortex Plasticity Induced by Non-invasive Brain Stimulation? A Systematic Review. Front Hum Neurosci 2021; 15:742373. [PMID: 34650418 PMCID: PMC8505675 DOI: 10.3389/fnhum.2021.742373] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 08/31/2021] [Indexed: 11/13/2022] Open
Abstract
Techniques of non-invasive brain stimulation (NIBS) of the human primary motor cortex (M1) are widely used in basic and clinical research to induce neural plasticity. The induction of neural plasticity in the M1 may improve motor performance ability in healthy individuals and patients with motor deficit caused by brain disorders. However, several recent studies revealed that various NIBS techniques yield high interindividual variability in the response, and that the brain-derived neurotrophic factor (BDNF) genotype (i.e., Val/Val and Met carrier types) may be a factor contributing to this variability. Here, we conducted a systematic review of all published studies that investigated the effects of the BDNF genotype on various forms of NIBS techniques applied to the human M1. The motor-evoked potential (MEP) amplitudes elicited by single-pulse transcranial magnetic stimulation (TMS), which can evaluate M1 excitability, were investigated as the main outcome. A total of 1,827 articles were identified, of which 17 (facilitatory NIBS protocol, 27 data) and 10 (inhibitory NIBS protocol, 14 data) were included in this review. More than two-thirds of the data (70.4–78.6%) on both NIBS protocols did not show a significant genotype effect of NIBS on MEP changes. Conversely, most of the remaining data revealed that the Val/Val type is likely to yield a greater MEP response after NIBS than the Met carrier type in both NIBS protocols (21.4–25.9%). Finally, to aid future investigation, we discuss the potential effect of the BDNF genotype based on mechanisms and methodological issues.
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Affiliation(s)
- Ryoki Sasaki
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Japan.,Discipline of Physiology, Adelaide Medical School, The University of Adelaide, Adelaide, SA, Australia
| | - Sho Kojima
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Japan.,Department of Physical Therapy, Niigata University of Health and Welfare, Niigata, Japan
| | - Hideaki Onishi
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Japan.,Department of Physical Therapy, Niigata University of Health and Welfare, Niigata, Japan
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11
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Ahmed AO, Kramer S, Hofman N, Flynn J, Hansen M, Martin V, Pillai A, Buckley PF. A Meta-Analysis of Brain-Derived Neurotrophic Factor Effects on Brain Volume in Schizophrenia: Genotype and Serum Levels. Neuropsychobiology 2021; 80:411-424. [PMID: 33706323 PMCID: PMC8619762 DOI: 10.1159/000514126] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Accepted: 12/29/2020] [Indexed: 11/19/2022]
Abstract
AIM The Val66Met single-nucleotide polymorphism (SNP) on the BDNF gene has established pleiotropic effects on schizophrenia incidence and morphologic alterations in the illness. The effects of brain-derived neurotrophic factor (BDNF) on brain volume measurements are however mixed seeming to be less established for most brain regions. The current meta-analytic review examined (1) the association of the Val66Met SNP and brain volume alterations in schizophrenia by comparing Met allele carriers to Val/Val homozygotes and (2) the association of serum BDNF with brain volume measurements. METHOD Studies included in the meta-analyses were identified through an electronic search of PubMed and PsycInfo (via EBSCO) for English language publications from January 2000 through December 2017. Included studies had conducted a genotyping procedure of Val66Met or obtained assays of serum BDNF and obtained brain volume data in patients with psychotic disorders. Nonhuman studies were excluded. RESULTS Study 1 which included 52 comparisons of Met carriers and Val/Val homozygotes found evidence of lower right and left hippocampal volumes among Met allele carriers with schizophrenia. Frontal measurements, while also lower among Met carriers, did not achieve statistical significance. Study 2 which included 7 examinations of the correlation between serum BDNF and brain volume found significant associations between serum BDNF levels and right and left hippocampal volume with lower BDNF corresponding to lower volumes. DISCUSSION The meta-analyses provided evidence of associations between brain volume alterations in schizophrenia and variations on the Val66Met SNP and serum BDNF. Given the limited number of studies, it remains unclear if BDNF effects are global or regionally specific.
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Affiliation(s)
- Anthony O. Ahmed
- Department of Psychiatry, Weill Cornell Medicine, White Plains, New York, USA,*Anthony O. Ahmed, Department of Psychiatry, Weill Cornell Medicine, 21 Bloomingdale Road, White Plains, NY 10605 (USA),
| | - Samantha Kramer
- Department of Psychology, Long Island University Post, New York, New York, USA
| | - Naama Hofman
- Department of Psychology, St. John's University, New York, New York, USA
| | - John Flynn
- Department of Psychology, Long Island University Brooklyn, New York, New York, USA
| | - Marie Hansen
- Department of Psychology, Long Island University Brooklyn, New York, New York, USA
| | - Victoria Martin
- Department of Psychology, City University of New York, New York, New York, USA
| | - Anilkumar Pillai
- Department of Psychiatry and Health Behavior, Augusta University, Augusta, Georgia, USA
| | - Peter F. Buckley
- Department of Psychiatry, Virginia Commonwealth University, Richmond, Virginia, USA
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Cognitive Deficit in Schizophrenia: From Etiology to Novel Treatments. Int J Mol Sci 2021; 22:ijms22189905. [PMID: 34576069 PMCID: PMC8468549 DOI: 10.3390/ijms22189905] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 09/08/2021] [Accepted: 09/10/2021] [Indexed: 01/09/2023] Open
Abstract
Schizophrenia is a major mental illness characterized by positive and negative symptoms, and by cognitive deficit. Although cognitive impairment is disabling for patients, it has been largely neglected in the treatment of schizophrenia. There are several reasons for this lack of treatments for cognitive deficit, but the complexity of its etiology-in which neuroanatomic, biochemical and genetic factors concur-has contributed to the lack of effective treatments. In the last few years, there have been several attempts to develop novel drugs for the treatment of cognitive impairment in schizophrenia. Despite these efforts, little progress has been made. The latest findings point to the importance of developing personalized treatments for schizophrenia which enhance neuroplasticity, and of combining pharmacological treatments with non-pharmacological measures.
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West GL, Konishi K, MacDonald K, Ni A, Joober R, Bohbot VD. The BDNF val66met polymorphism is associated with decreased use of landmarks and decreased fMRI activity in the hippocampus during virtual navigation. Eur J Neurosci 2021; 54:6406-6421. [PMID: 34467592 DOI: 10.1111/ejn.15431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 07/07/2021] [Accepted: 07/08/2021] [Indexed: 12/01/2022]
Abstract
People can navigate in a new environment using multiple strategies dependent on different memory systems. A series of studies have dissociated between hippocampus-dependent 'spatial' navigation and habit-based 'response' learning mediated by the caudate nucleus. The val66met polymorphism of the brain-derived neurotrophic factor (BDNF) gene leads to decreased secretion of BDNF in the brain, including the hippocampus. Here, we aim to investigate the role of the BDNF val66met polymorphism on virtual navigation behaviour and brain activity in healthy older adults. A total of 139 healthy older adult participants (mean age = 65.8 ± 4.4 years) were tested in this study. Blood samples were collected, and BDNF val66met genotyping was performed. Participants were divided into two genotype groups: val homozygotes and met carriers. Participants were tested on virtual dual-solution navigation tasks in which they could use either a hippocampus-dependent spatial strategy or a caudate nucleus-dependent response strategy to solve the task. A subset of the participants (n = 66) were then scanned in a 3T functional magnetic resonance imaging (fMRI) scanner while engaging in another dual-solution navigation task. BDNF val/val individuals and met carriers did not differ in learning performance. However, the two BDNF groups differed in learning strategy. BDNF val/val individuals relied more on landmarks to remember target locations (i.e., increased use of flexible spatial learning), while met carriers relied more on sequences and patterns to remember target locations (i.e., increased use of inflexible response learning). Additionally, BDNF val/val individuals had more fMRI activity in the hippocampus compared with BDNF met carriers during performance on the navigation task. This is the first study to show in older adults that BDNF met carriers use alternate learning strategies from val/val individuals and to identify differential brain activation of this behavioural difference between the two groups.
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Affiliation(s)
- Greg L West
- Department of Psychology, University of Montreal, Montréal, Quebec, Canada
| | - Kyoko Konishi
- Douglas Mental Health University Institute, Department of Psychiatry, McGill University, Verdun, Quebec, Canada
| | - Kathleen MacDonald
- Douglas Mental Health University Institute, Department of Psychiatry, McGill University, Verdun, Quebec, Canada
| | - Anjie Ni
- Douglas Mental Health University Institute, Department of Psychiatry, McGill University, Verdun, Quebec, Canada
| | - Ridha Joober
- Douglas Mental Health University Institute, Department of Psychiatry, McGill University, Verdun, Quebec, Canada
| | - Veronique D Bohbot
- Douglas Mental Health University Institute, Department of Psychiatry, McGill University, Verdun, Quebec, Canada
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14
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Treble-Barna A, Heinsberg LW, Puccio AM, Shaffer JR, Okonkwo DO, Beers SR, Weeks DE, Conley YP. Acute Brain-Derived Neurotrophic Factor DNA Methylation Trajectories in Cerebrospinal Fluid and Associations With Outcomes Following Severe Traumatic Brain Injury in Adults. Neurorehabil Neural Repair 2021; 35:790-800. [PMID: 34167372 DOI: 10.1177/15459683211028245] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Background. Epigenetic biomarkers have the potential to explain outcome heterogeneity following traumatic brain injury (TBI) but are largely unexplored. Objective. This exploratory pilot study characterized brain-derived neurotrophic factor (BDNF) DNA methylation trajectories following severe TBI. Methods. Brain-derived neurotrophic factor DNA methylation trajectories in cerebrospinal fluid (CSF) over the first 5 days following severe TBI in 112 adults were examined in association with 3- and 12-month outcomes. Results. Group-based trajectory analysis revealed low and high DNA methylation groups at two BDNF cytosine-phosphate-guanine (CpG) targets that showed suggestive associations (P < .05) with outcomes. Membership in the high DNA methylation groups was associated with better outcomes after controlling for age, sex, and injury severity. Associations of age × trajectory group interactions with outcomes at a third CpG site revealed a pattern of the same or better outcomes with higher ages in the high DNA methylation group and worse outcomes with higher ages in the low DNA methylation group. Conclusions. Although no observed associations met the empirical significance threshold after correcting for multiple comparisons, suggestive associations of the main effect models were consistent in their direction of effect and were observed across two CpG sites and two outcome time points. Results suggest that higher acute CSF BDNF DNA methylation may promote recovery following severe TBI in adults, and this effect may be more robust with higher age. While the results require replication in larger and racially diverse independent samples, BDNF DNA methylation may serve as an early postinjury biomarker helping to explain outcome heterogeneity following TBI.
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Affiliation(s)
- Amery Treble-Barna
- Department of Physical Medicine & Rehabilitation, 12317University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Lacey W Heinsberg
- Department of Human Genetics, 51303University of Pittsburgh Graduate School of Public Health, Pittsburgh, PA, USA.,Division of Internal Medicine, 12317University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Ava M Puccio
- Department of Neurological Surgery, 12317University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - John R Shaffer
- Department of Human Genetics, 51303University of Pittsburgh Graduate School of Public Health, Pittsburgh, PA, USA.,Department of Oral Biology, University of Pittsburgh School of Dental Medicine, Pittsburgh, PA, USA
| | - David O Okonkwo
- Department of Neurological Surgery, 12317University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Sue R Beers
- Department of Psychiatry, 12317University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Daniel E Weeks
- Department of Human Genetics, 51303University of Pittsburgh Graduate School of Public Health, Pittsburgh, PA, USA.,Department of Biostatistics, 12317University of Pittsburgh Graduate School of Public Health, Pittsburgh, PA, USA
| | - Yvette P Conley
- Department of Human Genetics, 51303University of Pittsburgh Graduate School of Public Health, Pittsburgh, PA, USA.,Department of Health Promotion and Development, University of Pittsburgh School of Nursing, Pittsburgh, PA, USA
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15
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Cechova K, Andel R, Angelucci F, Chmatalova Z, Markova H, Laczó J, Vyhnalek M, Matoska V, Kaplan V, Nedelska Z, Ward DD, Hort J. Impact of APOE and BDNF Val66Met Gene Polymorphisms on Cognitive Functions in Patients with Amnestic Mild Cognitive Impairment. J Alzheimers Dis 2021; 73:247-257. [PMID: 31771052 DOI: 10.3233/jad-190464] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Apolipoprotein (APOE) ɛ4 is a well-known risk factor for late-onset Alzheimer's disease (AD), but other AD-related gene polymorphisms might also be important, such as the polymorphism within the brain-derived neurotrophic factor (BDNF) gene. Carriage of BDNF Val66Met has been associated with faster cognitive decline and greater hippocampal atrophy in cognitively normal elderly. Thus, we examined the effects of the concurrent presence of APOE and BDNF polymorphisms on cognitive functions and brain morphometry in amnestic mild cognitive impairment (aMCI) patients. 107 aMCI patients (mean age = 72.2) were recruited from the Czech Brain Aging Study and, based on APOE and BDNF genes polymorphisms, were divided into four groups: ɛ4-BDNFVal/Val (n = 37), ɛ4-BDNFMet (n = 19), ɛ4+BDNFVal/Val (n = 35), and ɛ4+BDNFMet (n = 16). All patients underwent clinical examination, magnetic resonance imaging, and complex neuropsychological battery. The combination of APOEɛ4+ and BDNF Met was associated with significantly worse memory performance in immediate and delayed recall compared to other polymorphism groups. We did not observe increased atrophy in areas related to memory function in the ɛ4+BDNFMet group. Our findings suggest that carriage of ɛ4+BDNFMet is associated with more pronounced memory dysfunction, a typical feature of early AD, but not with structural brain changes in aMCI patients. These findings suggest that in APOEɛ4/BDNF Met carriers, synaptic dysfunction affecting memory may precede pronounced structural changes.
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Affiliation(s)
- Katerina Cechova
- Department of Neurology, Memory Clinic, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic.,International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czech Republic
| | - Ross Andel
- Department of Neurology, Memory Clinic, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic.,International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czech Republic.,School of Aging Studies, University of South Florida, Tampa, FL, USA
| | - Francesco Angelucci
- Department of Neurology, Memory Clinic, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - Zuzana Chmatalova
- International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czech Republic.,Department of Medical Chemistry and Clinical Biochemistry, 2nd Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Hana Markova
- Department of Neurology, Memory Clinic, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic.,International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czech Republic
| | - Jan Laczó
- Department of Neurology, Memory Clinic, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic.,International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czech Republic
| | - Martin Vyhnalek
- Department of Neurology, Memory Clinic, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic.,International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czech Republic
| | - Vaclav Matoska
- Department of Clinical Biochemistry, Hematology and Immunology, Homolka Hospital, Prague, Czech Republic
| | - Vojtech Kaplan
- Department of Clinical Biochemistry, Hematology and Immunology, Homolka Hospital, Prague, Czech Republic
| | - Zuzana Nedelska
- Department of Neurology, Memory Clinic, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic.,International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czech Republic
| | - David D Ward
- Department of Medicine, Division of Geriatric Medicine, Dalhousie University, Halifax, Nova Scotia, Canada.,Centre for Health Care of the Elderly, QEII Health Sciences Centre, Nova Scotia Health Authority, Halifax, Nova Scotia, Canada
| | - Jakub Hort
- Department of Neurology, Memory Clinic, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic.,International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czech Republic
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16
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Sasaki R, Otsuru N, Miyaguchi S, Kojima S, Watanabe H, Ohno K, Sakurai N, Kodama N, Sato D, Onishi H. Influence of Brain-Derived Neurotrophic Factor Genotype on Short-Latency Afferent Inhibition and Motor Cortex Metabolites. Brain Sci 2021; 11:brainsci11030395. [PMID: 33804682 PMCID: PMC8003639 DOI: 10.3390/brainsci11030395] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 03/01/2021] [Accepted: 03/18/2021] [Indexed: 12/11/2022] Open
Abstract
The Met allele of the brain-derived neurotrophic factor (BDNF) gene confers reduced cortical BDNF expression and associated neurobehavioral changes. BDNF signaling influences the survival, development, and synaptic function of cortical networks. Here, we compared gamma-aminobutyric acid (GABA)ergic network activity in the human primary motor cortex (M1) between the Met (Val/Met and Met/Met) and non-Met (Val/Val) genotype groups. Short- and long-interval intracortical inhibition, short-latency afferent inhibition (SAI), and long-latency afferent inhibition were measured using transcranial magnetic stimulation (TMS) as indices of GABAergic activity. Furthermore, the considerable inter-individual variability in inhibitory network activity typically measured by TMS may be affected not only by GABA but also by other pathways, including glutamatergic and cholinergic activities; therefore, we used 3-T magnetic resonance spectroscopy (MRS) to measure the dynamics of glutamate plus glutamine (Glx) and choline concentrations in the left M1, left somatosensory cortex, and right cerebellum. All inhibitory TMS conditions produced significantly smaller motor-evoked potentials than single-pulses. SAI was significantly stronger in the Met group than in the Val/Val group. Only the M1 Glx concentration was significantly lower in the Met group, while the BDNF genotype did not affect choline concentration in any region. Further, a positive correlation was observed between SAI and Glx concentrations only in M1. Our findings provide evidence that the BDNF genotype regulates both the inhibitory and excitatory circuits in human M1. In addition, lower Glx concentration in the M1 of Met carriers may alter specific inhibitory network on M1, thereby influencing the cortical signal processing required for neurobehavioral functions.
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Affiliation(s)
- Ryoki Sasaki
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata City, Niigata 950-3198, Japan; (N.O.); (S.M.); (S.K.); (H.W.); (N.K.); (D.S.); (H.O.)
- Discipline of Physiology, Adelaide Medical School, The University of Adelaide, Adelaide 5000, Australia
- Correspondence: ; Tel.: +81-25-257-4445
| | - Naofumi Otsuru
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata City, Niigata 950-3198, Japan; (N.O.); (S.M.); (S.K.); (H.W.); (N.K.); (D.S.); (H.O.)
- Department of Physical Therapy, Niigata University of Health and Welfare, Niigata City, Niigata 950-3198, Japan
| | - Shota Miyaguchi
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata City, Niigata 950-3198, Japan; (N.O.); (S.M.); (S.K.); (H.W.); (N.K.); (D.S.); (H.O.)
- Department of Physical Therapy, Niigata University of Health and Welfare, Niigata City, Niigata 950-3198, Japan
| | - Sho Kojima
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata City, Niigata 950-3198, Japan; (N.O.); (S.M.); (S.K.); (H.W.); (N.K.); (D.S.); (H.O.)
- Department of Physical Therapy, Niigata University of Health and Welfare, Niigata City, Niigata 950-3198, Japan
| | - Hiraku Watanabe
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata City, Niigata 950-3198, Japan; (N.O.); (S.M.); (S.K.); (H.W.); (N.K.); (D.S.); (H.O.)
| | - Ken Ohno
- Department of Radiological Technology, Niigata University of Health and Welfare, Niigata City, Niigata 950-3198, Japan; (K.O.); (N.S.)
| | - Noriko Sakurai
- Department of Radiological Technology, Niigata University of Health and Welfare, Niigata City, Niigata 950-3198, Japan; (K.O.); (N.S.)
| | - Naoki Kodama
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata City, Niigata 950-3198, Japan; (N.O.); (S.M.); (S.K.); (H.W.); (N.K.); (D.S.); (H.O.)
- Department of Radiological Technology, Niigata University of Health and Welfare, Niigata City, Niigata 950-3198, Japan; (K.O.); (N.S.)
| | - Daisuke Sato
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata City, Niigata 950-3198, Japan; (N.O.); (S.M.); (S.K.); (H.W.); (N.K.); (D.S.); (H.O.)
- Department of Health and Sports, Niigata University of Health and Welfare, Niigata City, Niigata 950-3198, Japan
| | - Hideaki Onishi
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata City, Niigata 950-3198, Japan; (N.O.); (S.M.); (S.K.); (H.W.); (N.K.); (D.S.); (H.O.)
- Department of Physical Therapy, Niigata University of Health and Welfare, Niigata City, Niigata 950-3198, Japan
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17
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Xu H, Wang J, Zhou Y, Chen D, Xiu M, Wang L, Zhang X. BDNF affects the mediating effect of negative symptoms on the relationship between age of onset and cognition in patients with chronic schizophrenia. Psychoneuroendocrinology 2021; 125:105121. [PMID: 33387927 DOI: 10.1016/j.psyneuen.2020.105121] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 12/21/2020] [Accepted: 12/21/2020] [Indexed: 12/19/2022]
Abstract
The age of onset of schizophrenia is related to variability in cognitive function and clinical characters, and negative symptoms and cognitive function share similar features that could be closely connected. Alterations in brain-derived neurotrophic factor (BDNF) expression and the Val66Met (rs6562) polymorphism are involved in the pathogenesis of the disease, but few studies have explored its influence on the associations of age of onset, cognitive function and clinical symptoms in schizophrenia. The clinical symptoms of a total of 573 patients with chronic schizophrenia were assessed by using the Positive and Negative Syndrome Scale (PANSS). Cognitive performance was assessed by the Repeatable Battery for the Assessment of Neuropsychological Status (RBANS). The serum BDNF level and Val66Met polymorphism were measured after the assessment. Our results showed the following: (1) patients with an earlier age of onset exhibited more negative symptoms and cognitive deficits, as well as lower levels of serum BDNF; (2) negative symptoms and cognitive function showed negative and positive correlations with age of onset, respectively, and worse cognitive function was associated with a high level of negative symptoms and a low level of serum BDNF; and (3) the moderated mediation analyses indicated that negative symptoms partially mediated the relationship between age of onset and cognitive deficits, which was moderated by serum BDNF. The mediating effect of negative symptoms exhibited a Met allele dose-dependent tendency. These results indicate that age of onset, cognitive function, and clinical symptoms of schizophrenia exhibit different relationships under different serum BDNF levels and BDNF Val66met polymorphisms.
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Affiliation(s)
- Hang Xu
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, China
| | - Jiesi Wang
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, China
| | - Yongjie Zhou
- Department of Psychiatric Rehabilitation, Shenzhen Kangning Hospital, Shenzhen, Guangdong, China
| | - Dachun Chen
- Beijing HuiLongGuan Hospital, Peking University, China
| | - Meihong Xiu
- Beijing HuiLongGuan Hospital, Peking University, China
| | - Li Wang
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, China; Department of Psychology, University of Chinese Academy of Sciences, Beijing, China
| | - Xiangyang Zhang
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, China; Department of Psychology, University of Chinese Academy of Sciences, Beijing, China.
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18
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Electrophysiological correlates of the brain-derived neurotrophic factor (BDNF) Val66Met polymorphism. Sci Rep 2020; 10:17915. [PMID: 33087740 PMCID: PMC7578797 DOI: 10.1038/s41598-020-74780-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Accepted: 08/25/2020] [Indexed: 12/20/2022] Open
Abstract
The brain-derived neurotrophic factor (BDNF) protein is essential for neuronal development. Val66Met (rs6265) is a functional polymorphism at codon 66 of the BDNF gene that affects neuroplasticity and has been associated with cognition, brain structure and function. The aim of this study was to clarify the relationship between BDNF Val66Met polymorphism and neuronal oscillatory activity, using the electroencephalogram (EEG), in a normative cohort. Neurotypical (N = 92) young adults were genotyped for the BDNF Val66Met polymorphism and had eyes open resting-state EEG recorded for four minutes. Focal increases in right fronto-parietal delta, and decreases in alpha-1 and right hemispheric alpha-2 amplitudes were observed for the Met/Met genotype group compared to Val/Val and Val/Met groups. Stronger frontal topographies were demonstrated for beta-1 and beta-2 in the Val/Met group versus the Val/Val group. Findings highlight BDNF Val66Met genotypic differences in EEG spectral amplitudes, with increased cortical excitability implications for Met allele carriers.
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19
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Neurotrophic Factor BDNF, Physiological Functions and Therapeutic Potential in Depression, Neurodegeneration and Brain Cancer. Int J Mol Sci 2020; 21:ijms21207777. [PMID: 33096634 PMCID: PMC7589016 DOI: 10.3390/ijms21207777] [Citation(s) in RCA: 344] [Impact Index Per Article: 86.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 10/16/2020] [Accepted: 10/19/2020] [Indexed: 01/10/2023] Open
Abstract
Brain-derived neurotrophic factor (BDNF) is one of the most distributed and extensively studied neurotrophins in the mammalian brain. BDNF signals through the tropomycin receptor kinase B (TrkB) and the low affinity p75 neurotrophin receptor (p75NTR). BDNF plays an important role in proper growth, development, and plasticity of glutamatergic and GABAergic synapses and through modulation of neuronal differentiation, it influences serotonergic and dopaminergic neurotransmission. BDNF acts as paracrine and autocrine factor, on both pre-synaptic and post-synaptic target sites. It is crucial in the transformation of synaptic activity into long-term synaptic memories. BDNF is considered an instructive mediator of functional and structural plasticity in the central nervous system (CNS), influencing dendritic spines and, at least in the hippocampus, the adult neurogenesis. Changes in the rate of adult neurogenesis and in spine density can influence several forms of learning and memory and can contribute to depression-like behaviors. The possible roles of BDNF in neuronal plasticity highlighted in this review focus on the effect of antidepressant therapies on BDNF-mediated plasticity. Moreover, we will review data that illustrate the role of BDNF as a potent protective factor that is able to confer protection against neurodegeneration, in particular in Alzheimer’s disease. Finally, we will give evidence of how the involvement of BDNF in the pathogenesis of brain glioblastoma has emerged, thus opening new avenues for the treatment of this deadly cancer.
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20
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Massa N, Alrohaibani A, Mammino K, Bello M, Taylor N, Cuthbert B, Fargotstein M, Coulter MM, Boatright JH, Nocera J, Duncan E. The Effect of Aerobic Exercise on Physical and Cognitive Outcomes in a Small Cohort of Outpatients with Schizophrenia. Brain Plast 2020; 5:161-174. [PMID: 33282679 PMCID: PMC7685675 DOI: 10.3233/bpl-200105] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Background: Schizophrenia (SCZ) is a severe, chronic illness characterized by psychotic symptoms and impairments in many cognitive domains. Dysregulation of brain derived neurotrophic factor (BDNF) is associated with the cognitive impairments seen in patients with SCZ. Given the growing literature supporting a positive effect of aerobic exercise on cognition in other populations, we hypothesized that a structured aerobic exercise program would improve cognitive and functional outcomes in subjects with SCZ, potentially mediated by increases in BDNF. Methods: The study was a small randomized parallel group clinical trial of subjects with SCZ comparing 12 weeks of aerobic exercise (AE) against control (CON) stretching and balance training. At Baseline, Week 12, and Week 20 we collected serum samples for analysis of brain derived neurotrophic factor (BDNF), and assessed functional, physical, and cognitive outcomes. Linear regression models were used to compare change scores between timepoints. Results: We randomized 21 subjects to AE and 17 to CON; however, only 9 AE and 6 CON completed their programs. Subjects in both groups were slower at the 400 m walk in Week 12 compared to Baseline, but the AE group had significantly less slowing than the CON group (B = –28.32, p = 0.011). Between Week 12 and Week 20, the AE group had a significantly greater change score on the Composite and Visual Learning Domain of the MATRICS Consensus Cognitive Battery (B = 5.11, p = 0.03; B = 13.96, p = 0.006). Conclusion: These results indicate that participation in a structured aerobic exercise paradigm may modestly blunt physical function decline and enhance cognitive function in individuals with SCZ.
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Affiliation(s)
- Nicholas Massa
- Atlanta Veterans Affairs Health Care System, Decatur, GA, USA
| | | | - Kevin Mammino
- Atlanta Veterans Affairs Health Care System, Decatur, GA, USA
| | - Medina Bello
- Atlanta Veterans Affairs Health Care System, Decatur, GA, USA
| | - Nicholas Taylor
- Atlanta Veterans Affairs Health Care System, Decatur, GA, USA
| | - Bruce Cuthbert
- Atlanta Veterans Affairs Health Care System, Decatur, GA, USA.,Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, GA, USA
| | | | | | - Jeffery H Boatright
- Atlanta Veterans Affairs Health Care System, Decatur, GA, USA.,Department of Ophthalmology, Emory University School of Medicine, Atlanta, GA, USA
| | - Joe Nocera
- Atlanta Veterans Affairs Health Care System, Decatur, GA, USA.,Department of Neurology and Rehabilitation Medicine, Emory University School of Medicine, Atlanta, GA, USA
| | - Erica Duncan
- Atlanta Veterans Affairs Health Care System, Decatur, GA, USA.,Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, GA, USA
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21
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Guo J, Yang Y, Jiang X, Guo M, Li X, Huang P, Liu Z. Differential promoter methylation and G-712A polymorphism of brain-derived neurotrophic factor in post-traumatic stress disorder patients of Li and Han populations in Hainan province. Gene 2020; 769:145192. [PMID: 33007373 DOI: 10.1016/j.gene.2020.145192] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 09/18/2020] [Accepted: 09/24/2020] [Indexed: 12/15/2022]
Abstract
This study aimed to explore the correlations of promoter methylation and single-nucleotide polymorphism (SNP) of brain-derived neurotrophic factor (BDNF) with post-traumatic stress disorder (PTSD) in Li and Han nationalities in Hainan province. Depression- and anxiety-related questionnaires were performed for PTSD-related information collection and analysis, with 164 PTSD patients and 141 healthy controls included. Serum BDNF level was measured and the methylation of BDNF promoter was evaluated. The BDNF SNP genotyping was performed, after which the risk genotypes for PTSD were detected and analyzed using logistic regression analysis. Our study found that the PTSD incidence was different in Li and Han nationalities. Serum BDNF level in PTSD patients in Li nationality was obviously lower than that in patients in Han nationality, while the methylation of BDNF promoter was higher in patients in Li nationality. The G-712A rather than rs6265 genotypes presented significant difference between PTSD patients and healthy controls. Meanwhile, the patients in Li nationality with AG genotype at G-712A inclined to depression, and patients with GG genotype had a greater degree of PTSD. G-712A and promoter methylation of BDNF were independent risk factors for PTSD. Our study demonstrated that the differences of PTSD patients between Li and Han nationalities were attributed by SNP G-712A genotypes and promoter methylation of BDNF.
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Affiliation(s)
- Juncheng Guo
- Department of Hepatobiliary Surgery, Central South University Xiangya School of Medical Affiliated Haikou Hospital, Haikou 570208, Hainan, PR China
| | - Yijun Yang
- Department of Hepatobiliary Surgery, Central South University Xiangya School of Medical Affiliated Haikou Hospital, Haikou 570208, Hainan, PR China
| | - Xiangling Jiang
- Psychological Research Center, Hainan General Hospital, Haikou 570311, Hainan, PR China
| | - Min Guo
- Psychological Research Center, Hainan General Hospital, Haikou 570311, Hainan, PR China.
| | - Xiang Li
- The Third People's Hospital of Hubei Province, Wuhan 430032, Hubei, PR China
| | - Ping Huang
- University of South China, Hengyang 421001, Hunan, PR China
| | - Zhuo Liu
- Psychological Research Center, Hainan General Hospital, Haikou 570311, Hainan, PR China
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Pujol N, Mané A, Bergé D, Mezquida G, Amoretti S, Pérez L, González-Pinto A, Barcones F, Cuesta MJ, Sánchez-Tomico G, Vieta E, Castro-Fornieles J, Bernardo M, Parellada M. Influence of BDNF and MTHFR polymorphisms on hippocampal volume in first-episode psychosis. Schizophr Res 2020; 223:345-352. [PMID: 32988741 DOI: 10.1016/j.schres.2020.08.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 04/26/2020] [Accepted: 08/04/2020] [Indexed: 01/10/2023]
Abstract
BACKGROUND The BDNF and MTHFR genes are independently linked to the pathogenesis of schizophrenia and its neuroimaging correlates. The aim of this study was to explore, for the first time, the individual and interactional effects of the Val66Met and C677T polymorphisms on hippocampal atrophy in first-episode psychosis (FEP). METHOD Multi-site case-control study based on clinical, genetic (rs 6265, rs 1801133) and structural magnetic resonance imaging data from 98 non-affective FEP patients and 117 matched healthy controls (HC). Hippocampal volume was estimated using FreeSurfer software and this volume was compared between diagnostic (FEP vs HC) and genotype (Val66Met, C677T) groups. The BDNF Val66Met x MTHFR C677T effect on hippocampal volume was further evaluated through stratified analyses. RESULTS After applying Bonferroni correction, diagnosis showed a significant effect for adjusted left and right hippocampal volume (FEP < HC). Stratified analyses showed that the interactive effect contributed to adjusted hippocampal size in both the HC (left and right hippocampus) and FEP groups (right hippocampus); among BDNF Met carriers, those with the CT-TT genotype exhibited decreased hippocampal volume compared to individuals with the homozygous normal CC genotype. CONCLUSIONS Our results provide preliminary evidence indicating that the Val66Met x C677T interaction may be a potential genetic risk factor for reduced hippocampal size in both healthy controls and in patients with FEP. Further research in independent samples including different ethnic groups is warranted to confirm this new finding.
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Affiliation(s)
- Nuria Pujol
- Institute of Neuropsychiatry and Addiction of the Barcelona MAR Health Park, Barcelona, Spain; Hospital del Mar Medical Research Institute (IMIM), Barcelona, Spain.
| | - Anna Mané
- Institute of Neuropsychiatry and Addiction of the Barcelona MAR Health Park, Barcelona, Spain; Hospital del Mar Medical Research Institute (IMIM), Barcelona, Spain; Biomedical Research Networking Center for Mental Health Network (CIBERSAM), Spain
| | - Daniel Bergé
- Institute of Neuropsychiatry and Addiction of the Barcelona MAR Health Park, Barcelona, Spain; Hospital del Mar Medical Research Institute (IMIM), Barcelona, Spain; Biomedical Research Networking Center for Mental Health Network (CIBERSAM), Spain
| | - Gisela Mezquida
- Biomedical Research Networking Center for Mental Health Network (CIBERSAM), Spain; Barcelona Clinic Schizophrenia Unit, Hospital Clinic of Barcelona, Neuroscience Institute; August Pi I Sunyer Biomedical Research Institute (IDIBAPS); University of Barcelona, Barcelona, Spain
| | - Silvia Amoretti
- Biomedical Research Networking Center for Mental Health Network (CIBERSAM), Spain; Barcelona Clinic Schizophrenia Unit, Hospital Clinic of Barcelona, Neuroscience Institute; August Pi I Sunyer Biomedical Research Institute (IDIBAPS); University of Barcelona, Barcelona, Spain
| | - Lucía Pérez
- Institute of Neuropsychiatry and Addiction of the Barcelona MAR Health Park, Barcelona, Spain; Hospital del Mar Medical Research Institute (IMIM), Barcelona, Spain
| | - Ana González-Pinto
- Biomedical Research Networking Center for Mental Health Network (CIBERSAM), Spain; Servicio de Psiquiatría, Hospital Santiago, OSI Araba, Vitoria-Gasteiz, Spain
| | - Fe Barcones
- Biomedical Research Networking Center for Mental Health Network (CIBERSAM), Spain; Department of Family Medicine, Hospital Universitario Miguel Servet, Instituto de Investigación Sanitaria Aragón (IIS Aragón), Zaragoza, Spain
| | - Manuel J Cuesta
- Department of Psychiatry, Complejo Hospitalario de Navarra, IdiSNA, Navarra Institute for Health Research, Pamplona, Spain
| | - Georgina Sánchez-Tomico
- Institute of Neuropsychiatry and Addiction of the Barcelona MAR Health Park, Barcelona, Spain; Hospital del Mar Medical Research Institute (IMIM), Barcelona, Spain
| | - Eduard Vieta
- Biomedical Research Networking Center for Mental Health Network (CIBERSAM), Spain; Bipolar Disorder Unit, Institute of Neurosciences, August Pi I Sunyer Biomedical Research Institute (IDIBAPS), Hospital Clinic of Barcelona, University of Barcelona, Barcelona, Spain
| | - Josefina Castro-Fornieles
- Biomedical Research Networking Center for Mental Health Network (CIBERSAM), Spain; Child and Adolescent Psychiatry and Psychology Department, 2017SGR881, Institute of Neurosciences, Hospital Clinic of Barcelona, Barcelona, Spain
| | - Miquel Bernardo
- Biomedical Research Networking Center for Mental Health Network (CIBERSAM), Spain; Barcelona Clinic Schizophrenia Unit, Hospital Clinic of Barcelona, Neuroscience Institute; August Pi I Sunyer Biomedical Research Institute (IDIBAPS); University of Barcelona, Barcelona, Spain
| | - Mara Parellada
- Biomedical Research Networking Center for Mental Health Network (CIBERSAM), Spain; Child and Adolescent Psychiatry Department, Hospital General Universitario Gregorio Marañón School of Medicine, Universidad Complutense, IiSGM, Madrid, Spain
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Ueda I, Takemoto K, Watanabe K, Sugimoto K, Ikenouchi A, Kakeda S, Katsuki A, Yoshimura R, Korogi Y. The brain-derived neurotrophic factor Val66Met polymorphism increases segregation of structural correlation networks in healthy adult brains. PeerJ 2020; 8:e9632. [PMID: 32844059 PMCID: PMC7414771 DOI: 10.7717/peerj.9632] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 07/09/2020] [Indexed: 12/19/2022] Open
Abstract
Background Although structural correlation network (SCN) analysis is an approach to evaluate brain networks, the neurobiological interpretation of SCNs is still problematic. Brain-derived neurotrophic factor (BDNF) is well-established as a representative protein related to neuronal differentiation, maturation, and survival. Since a valine-to-methionine substitution at codon 66 of the BDNF gene (BDNF Val66Met single nucleotide polymorphism (SNP)) is well-known to have effects on brain structure and function, we hypothesized that SCNs are affected by the BDNF Val66Met SNP. To gain insight into SCN analysis, we investigated potential differences between BDNF valine (Val) homozygotes and methionine (Met) carriers in the organization of their SCNs derived from inter-regional cortical thickness correlations. Methods Forty-nine healthy adult subjects (mean age = 41.1 years old) were divided into two groups according to their genotype (n: Val homozygotes = 16, Met carriers = 33). We obtained regional cortical thickness from their brain T1 weighted images. Based on the inter-regional cortical thickness correlations, we generated SCNs and used graph theoretical measures to assess differences between the two groups in terms of network integration, segregation, and modularity. Results The average local efficiency, a measure of network segregation, of BDNF Met carriers’ network was significantly higher than that of the Val homozygotes’ (permutation p-value = 0.002). Average shortest path lengths (a measure of integration), average local clustering coefficient (another measure of network segregation), small-worldness (a balance between integration and segregation), and modularity (a representative measure for modular architecture) were not significantly different between group (permutation p-values ≧ 0.01). Discussion and Conclusion Our results suggest that the BDNF Val66Met polymorphism may potentially influence the pattern of brain regional morphometric (cortical thickness) correlations. Comparing networks derived from inter-regional cortical thickness correlations, Met carrier SCNs have denser connections with neighbors and are more distant from random networks than Val homozygote networks. Thus, it may be necessary to consider potential effects of BDNF gene mutations in SCN analyses. This is the first study to demonstrate a difference between Val homozygotes and Met carriers in brain SCNs.
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Affiliation(s)
- Issei Ueda
- Department of Radiology, University of Occupational and Environmental Health, Kitakyusyu, Japan
| | - Kazuhiro Takemoto
- Department of Bioscience and Bioinformatics, Kyushu Institute of Technology, Iizuka, Japan
| | - Keita Watanabe
- Department of Radiology, University of Occupational and Environmental Health, Kitakyusyu, Japan
| | - Koichiro Sugimoto
- Department of Radiology, University of Occupational and Environmental Health, Kitakyusyu, Japan
| | - Atsuko Ikenouchi
- Department of Psychiatry, University of Occupational and Environmental Health, Kitakyusyu, Japan
| | - Shingo Kakeda
- Department of Radiology, University of Occupational and Environmental Health, Kitakyusyu, Japan
| | - Asuka Katsuki
- Department of Psychiatry, University of Occupational and Environmental Health, Kitakyusyu, Japan
| | - Reiji Yoshimura
- Department of Psychiatry, University of Occupational and Environmental Health, Kitakyusyu, Japan
| | - Yukunori Korogi
- Department of Radiology, University of Occupational and Environmental Health, Kitakyusyu, Japan
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Huey ED, Fremont R, Manoochehri M, Gazes Y, Lee S, Cosentino S, Tierney M, Wassermann EM, Momeni P, Grafman J. Effect of Functional BDNF and COMT Polymorphisms on Symptoms and Regional Brain Volume in Frontotemporal Dementia and Corticobasal Syndrome. J Neuropsychiatry Clin Neurosci 2020; 32:362-369. [PMID: 32397876 PMCID: PMC7606216 DOI: 10.1176/appi.neuropsych.19100211] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE The authors examined the effects of two common functional polymorphisms-brain-derived neurotrophic factor (BDNF) Val66Met and catechol-O-methyltransferase (COMT) Val158Met-on cognitive, neuropsychiatric, and motor symptoms and MRI findings in persons with frontotemporal lobar degeneration (FTLD) syndromes. METHODS The BDNF Val66Met and COMT Val158Met polymorphisms were genotyped in 174 participants with FTLD syndromes, including behavioral variant frontotemporal dementia, primary progressive aphasia, and corticobasal syndrome. Gray matter volumes and scores on the Delis-Kaplan Executive Function System, Mattis Dementia Rating Scale, Wechsler Memory Scale, and Neuropsychiatric Inventory were compared between allele groups. RESULTS The BDNF Met allele at position 66 was associated with a decrease in depressive symptoms (F=9.50, df=1, 136, p=0.002). The COMT Val allele at position 158 was associated with impairment of executive function (F=6.14, df=1, 76, p=0.015) and decreased bilateral volume of the head of the caudate in patients with FTLD (uncorrected voxel-level threshold of p<0.001). Neither polymorphism had a significant effect on motor function. CONCLUSIONS These findings suggest that common functional polymorphisms likely contribute to the phenotypic variability seen in patients with FTLD syndromes. This is the first study to implicate BDNF polymorphisms in depressive symptoms in FTLD. These results also support an association between COMT polymorphisms and degeneration patterns and cognition in FTLD.
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Affiliation(s)
- Edward D. Huey
- Taub Institute for Research on Alzheimer’s Disease and the Aging Brain, 630 W 168th St, P&S Box 16, New York, NY, 10032
- Department of Psychiatry, College of Physicians and Surgeons, Columbia University, New York, NY
- Department of Neurology, Columbia University College of Physicians and Surgeons, College of Physicians and Surgeons, Columbia University, New York, NY
- Cognitive Neuroscience Section, NIH/NINDS, Cognitive Neuroscience Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD
| | - Rachel Fremont
- Department of Psychiatry, College of Physicians and Surgeons, Columbia University, New York, NY
| | - Masood Manoochehri
- Taub Institute for Research on Alzheimer’s Disease and the Aging Brain, 630 W 168th St, P&S Box 16, New York, NY, 10032
- Department of Neurology, Columbia University College of Physicians and Surgeons, College of Physicians and Surgeons, Columbia University, New York, NY
| | - Yunglin Gazes
- Taub Institute for Research on Alzheimer’s Disease and the Aging Brain, 630 W 168th St, P&S Box 16, New York, NY, 10032
- Department of Neurology, Columbia University College of Physicians and Surgeons, College of Physicians and Surgeons, Columbia University, New York, NY
| | - Seonjoo Lee
- Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, NY
| | - Stephanie Cosentino
- Taub Institute for Research on Alzheimer’s Disease and the Aging Brain, 630 W 168th St, P&S Box 16, New York, NY, 10032
- Department of Neurology, Columbia University College of Physicians and Surgeons, College of Physicians and Surgeons, Columbia University, New York, NY
| | - Michael Tierney
- Cognitive Neuroscience Section, NIH/NINDS, Cognitive Neuroscience Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD
| | - Eric M. Wassermann
- Cognitive Neuroscience Section, NIH/NINDS, Cognitive Neuroscience Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD
| | | | - Jordan Grafman
- Cognitive Neuroscience Section, NIH/NINDS, Cognitive Neuroscience Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD
- Cognitive Neuroscience Laboratory, Think and Speak Lab, Shirley Ryan AbilityLab, Chicago, IL
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25
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van Haren N, Cahn W, Hulshoff Pol H, Kahn R. Schizophrenia as a progressive brain disease. Eur Psychiatry 2020; 23:245-54. [DOI: 10.1016/j.eurpsy.2007.10.013] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2007] [Revised: 10/11/2007] [Accepted: 10/18/2007] [Indexed: 01/06/2023] Open
Abstract
AbstractThere is convincing evidence that schizophrenia is characterized by abnormalities in brain volume. At the Department of Psychiatry of the University Medical Centre Utrecht, Netherlands, we have been carrying out neuroimaging studies in schizophrenia since 1995. We focused our research on three main questions. First, are brain volume abnormalities static or progressive in nature? Secondly, can brain volume abnormalities in schizophrenia be explained (in part) by genetic influences? Finally, what environmental factors are associated with the brain volume abnormalities in schizophrenia?Based on our findings we suggest that schizophrenia is a progressive brain disease. We showed different age-related trajectories of brain tissue loss suggesting that brain maturation that occurs in the third and fourth decade of life is abnormal in schizophrenia. Moreover, brain volume has been shown to be a useful phenotype for studying schizophrenia. Brain volume is highly heritable and twin and family studies show that unaffected relatives show abnormalities that are similar, but usually present to a lesser extent, to those found in the patients. However, also environmental factors play a role. Medication intake is indeed a confounding factor when interpreting brain volume (change) abnormalities, while independent of antipsychotic medication intake brain volume abnormalities appear influenced by the outcome of the illness.In conclusion, schizophrenia can be considered as a progressive brain disease with brain volume abnormalities that are for a large part influenced by genetic factors. Whether the progressive volume change is also mediated by genes awaits the results of longitudinal twin analyses. One of the main challenges for the coming years, however, will be the search for gene-by-environment interactions on the progressive brain changes in schizophrenia.
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26
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Jiang Y, Ming Q, Gao Y, Dong D, Sun X, Zhang X, Situ W, Yao S, Rao H. Effects of BDNF Val66Met polymorphisms on brain structures and behaviors in adolescents with conduct disorder. Eur Child Adolesc Psychiatry 2020; 29:479-488. [PMID: 31264106 DOI: 10.1007/s00787-019-01363-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Accepted: 06/24/2019] [Indexed: 10/26/2022]
Abstract
Accumulating evidence suggests that neural abnormalities in conduct disorder (CD) may be subject to genetic influences, but few imaging studies have taken genetic variants into consideration. The Val66Met polymorphism of brain-derived neurotrophic factor (BDNF) has emerged as a high-interest genetic variant due to its importance in cortical maturation, and several studies have implicated its involvement in neurodevelopmental disorders. Thus, it is unclear how this polymorphism may influence brain anatomy and aberrant behaviors in CD. A total of 65 male adolescents with CD and 69 gender-, IQ- and socioeconomic status-matched healthy controls (HCs) (age range 13-17 years) were enrolled in this study. Analyses of variance (ANOVAs) were used to assess the main effects of CD diagnosis, BDNF genotype, and diagnosis-genotype interactions on brain anatomy and behaviors. We detected a significant main effect of BDNF genotype on temporal gyrification and antisocial behaviors, but not on CD symptoms. Diagnosis-genotype interactive effects were found for cortical thickness of the superior temporal and adjacent areas. These results suggest that the BDNF Val66Met polymorphism may exert its influence both on neural alterations and delinquent behaviors in CD patients. This initial evidence highlights the importance of elucidating potentially different pathways between BDNF genotype and cortical alterations or delinquent behaviors in CD patients.
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Affiliation(s)
- Yali Jiang
- Medical Psychological Center, The Second Xiangya Hospital, Central South University, No. 139, Middle Renmin Road, Changsha, 410011, Hunan, People's Republic of China.,Center for Studies of Psychological Application, School of Psychology, South China Normal University, Guangzhou, Guangdong, People's Republic of China
| | - Qingsen Ming
- Medical Psychological Center, The Second Xiangya Hospital, Central South University, No. 139, Middle Renmin Road, Changsha, 410011, Hunan, People's Republic of China
| | - Yidian Gao
- Medical Psychological Center, The Second Xiangya Hospital, Central South University, No. 139, Middle Renmin Road, Changsha, 410011, Hunan, People's Republic of China
| | - Daifeng Dong
- Medical Psychological Center, The Second Xiangya Hospital, Central South University, No. 139, Middle Renmin Road, Changsha, 410011, Hunan, People's Republic of China
| | - Xiaoqiang Sun
- Medical Psychological Center, The Second Xiangya Hospital, Central South University, No. 139, Middle Renmin Road, Changsha, 410011, Hunan, People's Republic of China
| | - Xiaocui Zhang
- Medical Psychological Center, The Second Xiangya Hospital, Central South University, No. 139, Middle Renmin Road, Changsha, 410011, Hunan, People's Republic of China
| | - Weijun Situ
- Department of Radiology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China
| | - Shuqiao Yao
- Medical Psychological Center, The Second Xiangya Hospital, Central South University, No. 139, Middle Renmin Road, Changsha, 410011, Hunan, People's Republic of China. .,National Clinical Research Center on Psychiatry and Psychology, Changsha, Hunan, People's Republic of China. .,Medical Psychological Institute of Central South University, Changsha, Hunan, People's Republic of China.
| | - Hengyi Rao
- Center of Functional Neuroimaging, Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
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27
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Elsayed NA, Yamamoto KM, Froehlich TE. Genetic Influence on Efficacy of Pharmacotherapy for Pediatric Attention-Deficit/Hyperactivity Disorder: Overview and Current Status of Research. CNS Drugs 2020; 34:389-414. [PMID: 32133580 PMCID: PMC8083895 DOI: 10.1007/s40263-020-00702-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Multiple stimulant and non-stimulant medications are approved for the treatment of attention-deficit/hyperactivity disorder (ADHD), one of the most prevalent childhood neurodevelopmental disorders. Choosing among the available agents and determining the most effective ADHD medication for a given child can be a time-consuming process due to the high inter-individual variability in treatment efficacy. As a result, there is growing interest in identifying predictors of ADHD medication response in children through the burgeoning field of pharmacogenomics. This article reviews childhood ADHD pharmacogenomics efficacy studies published during the last decade (2009-2019), which have largely focused on pharmacodynamic candidate gene investigations of methylphenidate and atomoxetine response, with a smaller number investigating pharmacokinetic candidate genes and genome-wide approaches. Findings from studies which have advanced the field of ADHD pharmacogenomics through investigation of meta-analytic approaches and gene-gene interactions are also overviewed. Despite recent progress, no one genetic variant or currently available pharmacogenomics test has demonstrated clinical utility in pinpointing the optimal ADHD medication for a given individual patient, highlighting the need for further investigation.
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Affiliation(s)
- Nada A. Elsayed
- Division of Developmental and Behavioral Pediatrics,
Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA,Integrated Research Center for Fetal Medicine, Department
of Gynecology and Obstetrics, Johns Hopkins University School of Medicine,
Baltimore, Maryland, USA
| | - Kaila M. Yamamoto
- Division of Developmental and Behavioral Pediatrics,
Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA
| | - Tanya E. Froehlich
- Division of Developmental and Behavioral Pediatrics,
Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA,Department of Pediatrics, University of Cincinnati College
of Medicine, Cincinnati, Ohio, USA,Correspondence: Tanya Froehlich, MD,
Cincinnati Children’s Hospital Medical Center, 3333 Burnet Ave, MLC 4002,
Cincinnati, Ohio, USA 45229, Tel: 513-636-1154. Fax: 513-636-3800
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28
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The BDNF Val66Met Polymorphism Modulates Resilience of Neurological Functioning to Brain Ageing and Dementia: A Narrative Review. Brain Sci 2020; 10:brainsci10040195. [PMID: 32218234 PMCID: PMC7226504 DOI: 10.3390/brainsci10040195] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 03/19/2020] [Accepted: 03/24/2020] [Indexed: 02/06/2023] Open
Abstract
Brain-derived neurotropic factor (BDNF) is an abundant and multi-function neurotrophin in the brain. It is released following neuronal activity and is believed to be particularly important in strengthening neural networks. A common variation in the BDNF gene, a valine to methionine substitution at codon 66 (Val66Met), has been linked to differential expression of BDNF associated with experience-dependent plasticity. The Met allele has been associated with reduced production of BDNF following neuronal stimulation, which suggests a potential role of this variation with respect to how the nervous system may respond to challenges, such as brain ageing and related neurodegenerative conditions (e.g., dementia and Alzheimer’s disease). The current review examines the potential of the BDNF Val66Met variation to modulate an individual’s susceptibility and trajectory through cognitive changes associated with ageing and dementia. On balance, research to date indicates that the BDNF Met allele at this codon is potentially associated with a detrimental influence on the level of cognitive functioning in older adults and may also impart increased risk of progression to dementia. Furthermore, recent studies also show that this genetic variation may modulate an individual’s response to interventions targeted at building cognitive resilience to conditions that cause dementia.
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29
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Merritt VC, Clark AL, Evangelista ND, Sorg SF, Schiehser DM, Delano-Wood L. Dissociation of BDNF Val66Met polymorphism on neurocognitive functioning in military veterans with and without a history of remote mild traumatic brain injury. Clin Neuropsychol 2020; 34:1226-1247. [PMID: 32204647 DOI: 10.1080/13854046.2020.1740324] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
OBJECTIVE Since neurocognitive functioning following mild traumatic brain injury (mTBI) may be influenced by genetic factors that mediate synaptic survival and repair, we examined the influence of a common brain-derived neurotrophic factor (BDNF) polymorphism (Val66Met) on cognition using a well-defined sample of military Veterans with and without a history of mTBI. METHOD Participants included 138 Veterans (mTBI = 75; military controls [MCs] = 63) who underwent neuropsychological testing, including completion of self-report measures assessing psychiatric distress, and BDNF genotyping. The mTBI group was tested roughly 66.7 months following their most recent mTBI. Veterans were divided into two groups-Met+ (Met/Met and Met/Val; n = 49) and Met- (Val/Val; n = 89) and compared on domain-specific cognitive composite scores representing memory, executive functioning, and visuospatial speed. RESULTS ANCOVAs adjusting for psychiatric distress, sex, years of education, and ethnicity/race revealed a significant group (mTBI vs. MC) by BDNF genotype (Met + vs. Met-) interaction for the memory (p = .024; ηp 2 = .039) and executive functioning (p = .010; ηp 2 = .050) composites, such that Met+ mTBI Veterans demonstrated better performance than Met- mTBI Veterans on the cognitive measures, whereas Met+ MCs demonstrated worse performance relative to Met- MCs on the cognitive measures. No significant interaction was observed for the visuospatial speed composite (p = .938; ηp 2 < .001). CONCLUSIONS These findings offer preliminary evidence to suggest that the Met allele may be protective in the context of remote mTBI. Findings need to be replicated using larger samples, and future studies are necessary to elucidate the precise mechanisms and neural underpinnings of this interaction.
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Affiliation(s)
- Victoria C Merritt
- Research and Psychology Services, VA San Diego Healthcare System (VASDHS), San Diego, CA, USA.,School of Medicine Department of Psychiatry, University of California San Diego (UCSD), San Diego, CA, USA
| | - Alexandra L Clark
- Research and Psychology Services, VA San Diego Healthcare System (VASDHS), San Diego, CA, USA.,School of Medicine Department of Psychiatry, University of California San Diego (UCSD), San Diego, CA, USA
| | - Nicole D Evangelista
- Center for Cognitive Aging and Memory, Department of Clinical and Health Psychology, McKnight Brain Institute, College of Public Health and Health Professions, University of Florida, Gainesville, FL, USA
| | - Scott F Sorg
- Research and Psychology Services, VA San Diego Healthcare System (VASDHS), San Diego, CA, USA.,School of Medicine Department of Psychiatry, University of California San Diego (UCSD), San Diego, CA, USA
| | - Dawn M Schiehser
- Research and Psychology Services, VA San Diego Healthcare System (VASDHS), San Diego, CA, USA.,School of Medicine Department of Psychiatry, University of California San Diego (UCSD), San Diego, CA, USA.,Center of Excellence for Stress and Mental Health, VASDHS, San Diego, CA, USA
| | - Lisa Delano-Wood
- Research and Psychology Services, VA San Diego Healthcare System (VASDHS), San Diego, CA, USA.,School of Medicine Department of Psychiatry, University of California San Diego (UCSD), San Diego, CA, USA.,Center of Excellence for Stress and Mental Health, VASDHS, San Diego, CA, USA
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Mezquida G, Penadés R, Cabrera B, Savulich G, Lobo A, González-Pinto A, Penzol M, Corripio I, Fernandez-Egea E, Gassó P, Cuesta M, Bernardo M. Association of the brain-derived neurotrophic factor Val66Met polymorphism with negative symptoms severity, but not cognitive function, in first-episode schizophrenia spectrum disorders. Eur Psychiatry 2020; 38:61-69. [DOI: 10.1016/j.eurpsy.2016.04.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 04/18/2016] [Accepted: 04/24/2016] [Indexed: 12/12/2022] Open
Abstract
AbstractObjectiveA functional polymorphism of the brain-derived neurotrophic factor gene (BDNF) Val66Met has been associated with cognitive function and symptom severity in patients with schizophrenia. It has been suggested that the Val66Met polymorphism has a role as a modulator in a range of clinical features of the illness, including symptoms severity, therapeutic responsiveness, age of onset, brain morphology and cognitive function. However, little work has been done in first-episode schizophrenia (FES) spectrum disorders. The objective of this study is to investigate the association of the BDNF Val66Met polymorphism on cognitive function and clinical symptomatology in FES patients.MethodsUsing a cross-sectional design in a cohort of 204 patients with FES or a schizophrenia spectrum disorder and 204 healthy matched controls, we performed BDNF Val66Met genotyping and tested its relationship with cognitive testing (attention, working memory, learning/verbal memory and reasoning/problem-solving) and assessment of clinical symptom severity.ResultsThere was no significant influence of the BDNF allele frequency on cognitive factor scores in either patients or controls. An augmented severity of negative symptoms was found in FES patients that carried the Met allele.ConclusionsThe results of this study suggest that in patients with a first-episode of schizophrenia or a schizophrenia spectrum disorder, the BDNF Val66Met polymorphism does not exert an influence on cognitive functioning, but is associated with negative symptoms severity. BDNF may serve as suitable marker of negative symptomatology severity in FES patients within the schizophrenia spectrum.
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31
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Gorka SM, Teppen T, Radoman M, Phan KL, Pandey SC. Human Plasma BDNF Is Associated With Amygdala-Prefrontal Cortex Functional Connectivity and Problem Drinking Behaviors. Int J Neuropsychopharmacol 2020; 23:1-11. [PMID: 31722379 PMCID: PMC7064048 DOI: 10.1093/ijnp/pyz057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 10/29/2019] [Accepted: 11/11/2019] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Preclinical studies suggest that decreased levels of brain-derived neurotrophic factor in the amygdala play a role in anxiety and alcohol use disorder. The association between brain-derived neurotrophic factor levels and amygdala function in humans with alcohol use disorder is still unclear, although neuroimaging studies have also implicated the amygdala in alcohol use disorder and suggest that alcohol use disorder is associated with disrupted functional connectivity between the amygdala and prefrontal cortex during aversive states. METHODS The current study investigated whether plasma brain-derived neurotrophic factor levels in individuals with and without alcohol use disorder (n = 57) were associated with individual differences in amygdala reactivity and amygdala-prefrontal cortex functional connectivity during 2 forms of aversive responding captured via functional magnetic resonance imaging: anxiety elicited by unpredictable threat of shock and fear elicited by predictable threat of shock. We also examined whether brain-derived neurotrophic factor and brain function were associated with binge drinking episodes and alcohol use disorder age of onset. RESULTS During anxiety, but not fear, lower levels of plasma brain-derived neurotrophic factor were associated with less connectivity between the left amygdala and the medial prefrontal cortex and the inferior frontal gyrus. In addition, within individuals with alcohol use disorder (only), lower levels of brain-derived neurotrophic factor and amygdala-medial prefrontal cortex functional connectivity during anxiety were associated with more binge episodes within the past 60 days and a lower age of alcohol use disorder onset. There were no associations between brain-derived neurotrophic factor levels and focal amygdala task reactivity. CONCLUSIONS Together, the results indicate that plasma brain-derived neurotrophic factor levels are related to amygdala circuit functioning in humans, particularly during anxiety, and these individual differences may relate to drinking behaviors.
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Affiliation(s)
- Stephanie M Gorka
- Department of Psychiatry, University of Illinois-Chicago, Chicago, Illinois
- Center for Alcohol Research in Epigenetics (CARE), University of Illinois-Chicago, Chicago, Illinois
- Department of Psychology, University of Illinois-Chicago, Chicago, Illinois
| | - Tara Teppen
- Department of Psychiatry, University of Illinois-Chicago, Chicago, Illinois
- Center for Alcohol Research in Epigenetics (CARE), University of Illinois-Chicago, Chicago, Illinois
- Jesse Brown VA Medical Center, Chicago, Illinois
| | - Milena Radoman
- Department of Psychiatry, University of Illinois-Chicago, Chicago, Illinois
| | - K Luan Phan
- Department of Psychiatry, University of Illinois-Chicago, Chicago, Illinois
- Department of Psychology, University of Illinois-Chicago, Chicago, Illinois
- Jesse Brown VA Medical Center, Chicago, Illinois
| | - Subhash C Pandey
- Department of Psychiatry, University of Illinois-Chicago, Chicago, Illinois
- Center for Alcohol Research in Epigenetics (CARE), University of Illinois-Chicago, Chicago, Illinois
- Jesse Brown VA Medical Center, Chicago, Illinois
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Utami N, Effendy E, Amin M. The Relation of Brain-Derived Neurotropic Factor (BDNF) Serum Level to Sub-Domain Cognitive Functions of Indonesian Schizophrenia Patients Measured by MoCA-Ina. Open Access Maced J Med Sci 2019; 7:4053-4058. [PMID: 32165951 PMCID: PMC7061403 DOI: 10.3889/oamjms.2019.705] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 12/16/2019] [Accepted: 12/17/2019] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND BDNF implies to the development of abnormal nerves and neurotransmission that occurred during the changes of cognitive functions. However, in determining initial diagnosis of schizophrenia, measurements focus on the presences of positive and negative symptoms, and general psychopathological features without concerning the BDNF serum, which involves in central nervous system as the main symptom of schizophrenia. AIM To determine the relation of BDNF serum level to cognitive functions of schizophrenia patients based on sub-domain of Montreal Cognitive Assessment Indonesia Version (MoCA-Ina). METHODS This study was carried out based on observational analysis with cross-sectional design study. The samples were collected by non-probability sampling and consecutive sampling by recruiting 65 of male schizophrenia patients at Prof. Dr. M. Ildrem Mental Hospital, Medan, North Sumatera, Indonesia. BDNF serum levels were analysed throughout quantitative sandwich enzyme immunoassay method, while the cognitive functions were conducted by performing the MoCA-Ina, which concern to attentions and concentrations, executive function, memory, languages, visuoconstructional abilities, numerical calculation, and orientation. RESULTS The serum level of BDNF was accounted averagely for 27161.26, with 5350.37 of standard deviation. There was positive correlation with medium strength (r = 0.4 - < 0.6) in visuospatial function, attention (r = 0.437), and memory (r = 0.413). CONCLUSION Relation between BDNF serum level and cognitive function occurred in visuospatial, attention and memory domains based on MoCA-Ina assessment.
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Affiliation(s)
- Nurul Utami
- Department of Psychiatry, Faculty of Medicine, Universitas Sumatera Utara, Medan 20155, Indonesia
| | - Elmeida Effendy
- Department of Psychiatry, Faculty of Medicine, Universitas Sumatera Utara, Medan 20155, Indonesia
| | - Mustafa Amin
- Department of Psychiatry, Faculty of Medicine, Universitas Sumatera Utara, Medan 20155, Indonesia
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Kristinsson S, Yourganov G, Xiao F, Bonilha L, Stark BC, Rorden C, Basilakos A, Fridriksson J. Brain-Derived Neurotrophic Factor Genotype-Specific Differences in Cortical Activation in Chronic Aphasia. JOURNAL OF SPEECH, LANGUAGE, AND HEARING RESEARCH : JSLHR 2019; 62:3923-3936. [PMID: 31756156 PMCID: PMC7203521 DOI: 10.1044/2019_jslhr-l-rsnp-19-0021] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 06/02/2019] [Accepted: 07/29/2019] [Indexed: 05/04/2023]
Abstract
Purpose The brain-derived neurotrophic factor (BDNF) gene has been shown to be important for synaptic plasticity in animal models. Human research has suggested that BDNF genotype may influence stroke recovery. Some studies have suggested a genotype-specific motor-related brain activation in stroke recovery. However, recovery from aphasia in relation to BDNF genotype and language-related brain activation has received limited attention. We aimed to explore functional brain activation by BDNF genotype in individuals with chronic aphasia. Consistent with findings in healthy individuals and individuals with poststroke motor impairment, we hypothesized that, among individuals with aphasia, the presence of the Met allele of the BDNF gene is associated with reduced functional brain activation compared to noncarriers of the Met allele. Method Eighty-seven individuals with chronic stroke-induced aphasia performed a naming task during functional magnetic resonance imaging scanning and submitted blood or saliva samples for BDNF genotyping. The mean number of activated voxels was compared between groups, and group-based activation maps were directly compared. Neuropsychological testing was conducted to compare language impairment between BDNF genotype groups. The Western Aphasia Battery Aphasia Quotient (Kertesz, 2007) was included as a covariate in all analyses. Results While lesion size was comparable between groups, the amount of activation, quantified as the number of activated voxels, was significantly greater in noncarriers of the Met allele (whole brain: 98,500 vs. 28,630, p < .001; left hemisphere only: 37,209 vs. 7,000, p < .001; right hemisphere only: 74,830 vs. 30,630, p < .001). This difference was most strongly expressed in the right hemisphere posterior temporal area, pre- and postcentral gyrus, and frontal lobe, extending into the white matter. Correspondingly, the atypical BDNF genotype group was found to have significantly less severe aphasia (Western Aphasia Battery Aphasia Quotient of 64.2 vs. 54.3, p = .033) and performed better on a naming task (Philadelphia Naming Test [Roach, Schwartz, Martin, Grewal, & Brecher, 1996] score of 74.7 vs. 52.8, p = .047). A region of interest analysis of intensity of activation revealed no group differences, and a direct comparison of average activation maps across groups similarly yielded null results. Conclusion BDNF genotype mediates cortical brain activation in individuals with chronic aphasia. Correspondingly, individuals carrying the Met allele present with more severe aphasia compared to noncarriers. These findings warrant further study into the effects of BDNF genotype in aphasia. Supplemental Material https://doi.org/10.23641/asha.10073147 Presentation Video https://doi.org/10.23641/asha.10257581.
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Affiliation(s)
- Sigfus Kristinsson
- Department of Communication Sciences & Disorders, University of South Carolina, Columbia
| | | | - Feifei Xiao
- Department of Epidemiology and Biostatistics, University of South Carolina, Columbia
| | - Leonardo Bonilha
- Department of Neurology, Medical University of South Carolina, Charleston
| | - Brielle C. Stark
- Department of Speech and Hearing Sciences, Indiana University, Bloomington
| | - Chris Rorden
- Department of Psychology, University of South Carolina, Columbia
| | - Alexandra Basilakos
- Department of Communication Sciences & Disorders, University of South Carolina, Columbia
| | - Julius Fridriksson
- Department of Communication Sciences & Disorders, University of South Carolina, Columbia
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Cognitive impairment in patients with treatment resistant schizophrenia: Associations with DRD2, DRD3, HTR2A, BDNF and CYP2D6 genetic polymorphisms. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.npbr.2019.06.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Korthauer LE, Awe E, Frahmand M, Driscoll I. Genetic Risk for Age-Related Cognitive Impairment Does Not Predict Cognitive Performance in Middle Age. J Alzheimers Dis 2019; 64:459-471. [PMID: 29865048 DOI: 10.3233/jad-171043] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Alzheimer's disease (AD) is characterized by memory loss and executive dysfunction, which correspond to structural changes to the medial temporal lobes (MTL) and prefrontal cortex (PFC), respectively. Given the overlap in cognitive deficits between healthy aging and the earliest stages of AD, early detection of AD remains a challenge. The goal of the present study was to study MTL- and PFC-dependent cognitive functioning in middle-aged individuals at genetic risk for AD or cognitive impairment who do not currently manifest any clinical symptoms. Participants (N = 150; aged 40-60 years) underwent genotyping of 47 single nucleotide polymorphisms (SNPs) in six genes previously associated with memory or executive functioning: APOE, SORL1, BDNF, TOMM40, KIBRA, and COMT. They completed two MTL-dependent tasks, the virtual Morris Water Task (vMWT) and transverse patterning discriminations task (TPDT), and the PFC-dependent reversal learning task. Although age was associated with poorer performance on the vMWT and TPDT within this middle-aged sample, there were no genotype-associated differences in cognitive performance. Although the vMWT and TPDT may be sensitive to age-related changes in cognition, carriers of APOE, SORL1, BDNF, TOMM40, KIBRA, and COMT risk alleles do not exhibit alteration in MTL- and PFC-dependent functioning in middle age compared to non-carriers.
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Affiliation(s)
- Laura E Korthauer
- Department of Psychology, University of Wisconsin-Milwaukee, Milwaukee, WI, USA
| | - Elizabeth Awe
- Department of Psychology, University of Wisconsin-Milwaukee, Milwaukee, WI, USA.,Department of Neurology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Marijam Frahmand
- Department of Psychology, University of Wisconsin-Milwaukee, Milwaukee, WI, USA
| | - Ira Driscoll
- Department of Psychology, University of Wisconsin-Milwaukee, Milwaukee, WI, USA
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McKay NS, Moreau D, Henare DT, Kirk IJ. The brain-derived neurotrophic factor Val66Met genotype does not influence the grey or white matter structures underlying recognition memory. Neuroimage 2019; 197:1-12. [PMID: 30954706 DOI: 10.1016/j.neuroimage.2019.03.072] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 03/01/2019] [Accepted: 03/30/2019] [Indexed: 10/27/2022] Open
Abstract
A single nucleotide polymorphism (SNP) in the gene coding for brain-derived neurotrophic factor (BDNF) has previously been associated with a reduction in recognition memory performance. While previous findings have highlighted that this SNP contributes to recognition memory, little is known about its influence on subprocesses of recognition, familiarity and recollection. Previous research has reported reduced hippocampal volume and decreased fractional anisotropy in carriers of the Met allele across a range of white matter tracts, including those networks that may support recognition memory. Here, in a sample of 61 healthy young adults, we used a source memory task to measure accuracy on each recognition subprocess, in order to determine whether the Val66Met SNP (rs6265) influences these equally. Additionally, we compared grey matter volume between these groups for structures that underpin familiarity and recollection separately. Finally, we used probabilistic tractography to reconstruct tracts that subserve each of these two recognition systems. Behaviourally, we found group differences on the familiarity measure, but not on recollection. However, we did not find any group difference on grey- or white-matter structures. Together, these results suggest a functional influence of the Val66Met SNP that is independent of coarse structural changes, and nuance previous research highlighting the relationship between BDNF, brain structure, and behaviour.
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Affiliation(s)
- Nicole S McKay
- School of Psychology, University of Auckland, New Zealand.
| | - David Moreau
- School of Psychology, University of Auckland, New Zealand
| | - Dion T Henare
- School of Psychology, University of Auckland, New Zealand
| | - Ian J Kirk
- School of Psychology, University of Auckland, New Zealand; Brain Research New Zealand, New Zealand
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Zaki NFW, Saleh E, Elwasify M, Mahmoud E, Zaki J, Spence DW, BaHammam AS, Pandi-Perumal SR. The association of BDNF gene polymorphism with cognitive impairment in insomnia patients. Prog Neuropsychopharmacol Biol Psychiatry 2019; 88:253-264. [PMID: 30076879 DOI: 10.1016/j.pnpbp.2018.07.025] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 07/20/2018] [Accepted: 07/29/2018] [Indexed: 02/02/2023]
Abstract
BACKGROUND Reductions in BDNF activity have shown associations with depressed mood. Other evidence has demonstrated that the BDNF Val66Met polymorphism (rs6265) appears to reduce neural plasticity. A limited number of studies have investigated the influence of these genetic polymorphisms in insomnia. The present study sought to confirm the presence of associations between BDNF Val66Met polymorphism (rs6265) occurrence in normal sleepers and those with insomnia. METHOD The study subjects consisted of a patient group (n = 199) complaining of insomnia and a control group (n = 51). Each subject was clinically interviewed using questions taken from the Brief Insomnia Questionnaire. After the interview, the subjects were asked to complete the Insomnia Severity Index, The Hamilton Depression Rating Scale, and the Montreal Cognitive Assessment Test. An overnight polysomnography test was also administered. Blood samples were collected for genetic study. RESULTS The insomnia patients showed a greater prevalence of heterozygous (A/G) VAL/MET polymorphism than the normal controls (p = ≤ 0.0001). This finding confirmed that this genetic polymorphism, which impairs BDNF activity, is an important correlate of disturbed sleep. Further, the finding of significantly greater (p = ≤ 0.0001) depression scores among the insomnia group suggested that BDNF is an important factor in the development of depressive symptoms. CLINICAL IMPLICATIONS The results of the present study indicate that BDNF gene polymorphism plays a prominent role in the variation of symptoms among insomnia patients and, further, that this polymorphism is strongly related to the severity of depression.
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Affiliation(s)
- Nevin F W Zaki
- Sleep Research Unit, Mansoura University, Egypt; Department of Psychiatry, Mansoura University, Egypt.
| | - Elsayed Saleh
- Department of Psychiatry, Mansoura University, Egypt
| | | | | | - John Zaki
- Department 0f Mechanical Engineering, Statistical Consultation Office, Mansoura University, Egypt
| | | | - Ahmed S BaHammam
- University Sleep Disorders Center, College of Medicine, King Saud University, Riyadh, Saudi Arabia
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Jiang W, King TZ, Turner JA. Imaging Genetics Towards a Refined Diagnosis of Schizophrenia. Front Psychiatry 2019; 10:494. [PMID: 31354550 PMCID: PMC6639711 DOI: 10.3389/fpsyt.2019.00494] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Accepted: 06/24/2019] [Indexed: 01/31/2023] Open
Abstract
Current diagnoses of schizophrenia and related psychiatric disorders are classified by phenomenological principles and clinical descriptions while ruling out other symptoms and conditions. Specific biomarkers are needed to assist the current diagnostic system. However, complicated gene and environment interactions induce great disease heterogeneity. This unclear etiology and heterogeneity raise difficulties in distinguishing schizophrenia-related effects. Simultaneously, the overlap in symptoms, genetic variations, and brain alterations in schizophrenia and related psychiatric disorders raises similar difficulties in determining disease-specific effects. Imaging genetics is a unique methodology to assess the impact of genetic factors on both brain structure and function. More importantly, imaging genetics builds a bridge to understand the behavioral and clinical implications of genetics and neuroimaging. By characterizing and quantifying the brain measures affected in psychiatric disorders, imaging genetics is contributing to identifying potential biomarkers for schizophrenia and related disorders. To date, candidate gene analysis, genome-wide association studies, polygenetic risk score analysis, and large-scale collaborative studies have made contributions to the understanding of schizophrenia with the potential to serve as biomarkers. Despite limitations, imaging genetics remains promising as more aggregative, clustering methods and imaging genetics-compatible clinical assessments are employed in future studies. We review imaging genetics' contribution to our understanding of the heterogeneity within schizophrenia and the commonalities across schizophrenia and other diagnostic borders, and we will discuss whether imaging genetics is ready to form its own diagnostic system.
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Affiliation(s)
- Wenhao Jiang
- Department of Psychology and the Neuroscience Institute, Georgia State University, Atlanta, GA, United States
| | - Tricia Z King
- Department of Psychology and the Neuroscience Institute, Georgia State University, Atlanta, GA, United States
| | - Jessica A Turner
- Department of Psychology and the Neuroscience Institute, Georgia State University, Atlanta, GA, United States.,Mind Research Network, Albuquerque, NM, United States
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Kelly S, Guimond S, Lyall A, Stone WS, Shenton ME, Keshavan M, Seidman LJ. Neural correlates of cognitive deficits across developmental phases of schizophrenia. Neurobiol Dis 2018; 131:104353. [PMID: 30582983 DOI: 10.1016/j.nbd.2018.12.013] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2018] [Revised: 11/21/2018] [Accepted: 12/20/2018] [Indexed: 12/28/2022] Open
Abstract
Schizophrenia is associated with cognitive deficits across all stages of the illness (i.e., high risk, first episode, early and chronic phases). Identifying the underlying neurobiological mechanisms of these deficits is an important area of scientific inquiry. Here, we selectively review evidence regarding the pattern of deficits across the developmental trajectory of schizophrenia using the five cognitive domains identified by the Research Domain Criteria (RDoC) initiative. We also report associated findings from neuroimaging studies. We suggest that most cognitive domains are affected across the developmental trajectory, with corresponding brain structural and/or functional differences. The idea of a common mechanism driving these deficits is discussed, along with implications for cognitive treatment in schizophrenia.
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Affiliation(s)
- Sinead Kelly
- Massachusetts Mental Health Center, Public Psychiatry Division, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA; Psychiatry Neuroimaging Laboratory, Department of Psychiatry, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Synthia Guimond
- Massachusetts Mental Health Center, Public Psychiatry Division, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA; The Royal's Institute of Mental Health Research, University of Ottawa, Ottawa, ON, Canada
| | - Amanda Lyall
- Psychiatry Neuroimaging Laboratory, Department of Psychiatry, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA; Department of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - William S Stone
- Massachusetts Mental Health Center, Public Psychiatry Division, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Martha E Shenton
- Psychiatry Neuroimaging Laboratory, Department of Psychiatry, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA; Department of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA; Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA; VA Boston Healthcare System, Brockton Division, Brockton, MA, USA
| | - Matcheri Keshavan
- Massachusetts Mental Health Center, Public Psychiatry Division, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
| | - Larry J Seidman
- Massachusetts Mental Health Center, Public Psychiatry Division, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA; Department of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
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Fridriksson J, Elm J, Stark BC, Basilakos A, Rorden C, Sen S, George MS, Gottfried M, Bonilha L. BDNF genotype and tDCS interaction in aphasia treatment. Brain Stimul 2018; 11:1276-1281. [PMID: 30150003 PMCID: PMC6293970 DOI: 10.1016/j.brs.2018.08.009] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 08/13/2018] [Accepted: 08/14/2018] [Indexed: 12/12/2022] Open
Abstract
Background: Several studies, including a randomized controlled trial by our group, support applying anodal tDCS (A-tDCS) to the left hemisphere during behavioral aphasia treatment to improve outcomes. A clear mechanism explaining A-tDCS’s efficacy has not been established, but modulation of neuroplasticity may be involved. Objective/hypothesis: The brain-derived neurotrophic factor (BDNF) gene influences neuroplasticity and may modulate the effects of tDCS. Utilizing data from our recently completed trial, we conducted a planned test of whether aphasia treatment outcome is influenced by interaction between A-tDCS and a single-nucleotide polymorphism of the BDNF gene, rs6265. Methods: Seventy-four individuals with chronic stroke-induced aphasia completed 15 language therapy sessions and were randomized to receive 1 mA A-tDCS or sham tDCS (S-tDCS) to the intact left temporoparietal region for the first 20 min of each session. BDNF genotype was available for 67 participants: 37 participants had the typical val/val genotype. The remaining 30 participants had atypical BDNF genotype (Met allele carriers). The primary outcome factor was improvement in object naming at 1 week after treatment completion. Maintenance of treatment effects was evaluated at 4 and 24 weeks. Results: An interaction was revealed between tDCS condition and genotype for treatment-related naming improvement (F = 4.97, p = 0.03). Participants with val/val genotype who received A-tDCS showed greater response to aphasia treatment than val/val participants who received S-tDCS, as well as the Met allele carriers, regardless of tDCS condition. Conclusion: Individuals with the val/val BDNF genotype are more likely to benefit from A-tDCS during aphasia treatment.
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Affiliation(s)
- Julius Fridriksson
- Department of Communication Sciences & Disorders, University of South Carolina, USA.
| | - Jordan Elm
- Department of Public Health Sciences, Medical University of South Carolina, USA
| | - Brielle C Stark
- Department of Communication Sciences & Disorders, University of South Carolina, USA
| | - Alexandra Basilakos
- Department of Communication Sciences & Disorders, University of South Carolina, USA
| | - Chris Rorden
- Department of Psychology, University of South Carolina, USA
| | - Souvik Sen
- Department of Neurology, University of South Carolina, USA
| | - Mark S George
- Department of Psychiatry, Medical University of South Carolina, USA; Department of Neurology, Medical University of South Carolina, USA; Ralph H. Johnson VA Medical Center, Charleston, USA
| | - Michelle Gottfried
- Department of Public Health Sciences, Medical University of South Carolina, USA
| | - Leonardo Bonilha
- Department of Neurology, Medical University of South Carolina, USA
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Toh YL, Ng T, Tan M, Tan A, Chan A. Impact of brain-derived neurotrophic factor genetic polymorphism on cognition: A systematic review. Brain Behav 2018; 8:e01009. [PMID: 29858545 PMCID: PMC6043712 DOI: 10.1002/brb3.1009] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Revised: 04/08/2018] [Accepted: 04/15/2018] [Indexed: 01/17/2023] Open
Abstract
INTRODUCTION Brain-derived neurotrophic factor (BDNF) has an important role in the neurogenesis and neuroplasticity of the brain. This systematic review was designed to examine the association between BDNF Val66Met (rs6265) polymorphism and four cognitive domains-attention and concentration, executive function, verbal fluency, and memory, respectively. METHODOLOGY Primary literature search was performed using search engines such as PubMed and Scopus. Observational studies that evaluated the neurocognitive performances in relation to BDNF polymorphism within human subjects were included in this review, while animal studies, overlapping studies, and meta-analysis were excluded. RESULTS Forty of 82 reviewed studies (48.8%) reported an association between Val66Met polymorphism and neurocognitive domains. The proportion of the studies showing positive findings in cognitive performances between Val/Val homozygotes and Met carriers was comparable, at 30.5% and 18.3%, respectively. The highest percentage of positive association between Val66Met polymorphism and neurocognition was reported under the memory domain, with 26 of 63 studies (41.3%), followed by 18 of 47 studies (38.3%) under the executive function domain and four of 23 studies (17.4%) under the attention and concentration domain. There were no studies showing an association between Val66Met polymorphism and verbal fluency. In particular, Val/Val homozygotes performed better in tasks related to the memory domain, while Met carriers performed better in terms of executive function, in both healthy individuals and clinical populations. CONCLUSION While numerous studies report an association between Val66Met polymorphism and neurocognitive changes in executive function and memory domains, the effect of Met allele has not been clearly established.
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Affiliation(s)
- Yi Long Toh
- Department of PharmacyFaculty of ScienceNational University of SingaporeSingaporeSingapore
| | - Terence Ng
- Department of PharmacyFaculty of ScienceNational University of SingaporeSingaporeSingapore
| | - Megan Tan
- Department of PharmacyFaculty of ScienceNational University of SingaporeSingaporeSingapore
| | - Azrina Tan
- Department of PharmacyFaculty of ScienceNational University of SingaporeSingaporeSingapore
| | - Alexandre Chan
- Department of PharmacyFaculty of ScienceNational University of SingaporeSingaporeSingapore
- Department of PharmacyNational Cancer Centre SingaporeSingaporeSingapore
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Janouschek H, Eickhoff CR, Mühleisen TW, Eickhoff SB, Nickl-Jockschat T. Using coordinate-based meta-analyses to explore structural imaging genetics. Brain Struct Funct 2018; 223:3045-3061. [PMID: 29730826 DOI: 10.1007/s00429-018-1670-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 04/19/2018] [Indexed: 12/29/2022]
Abstract
Imaging genetics has become a highly popular approach in the field of schizophrenia research. A frequently reported finding is that effects from common genetic variation are associated with a schizophrenia-related structural endophenotype. Genetic contributions to a structural endophenotype may be easier to delineate, when referring to biological rather than diagnostic criteria. We used coordinate-based meta-analyses, namely the anatomical likelihood estimation (ALE) algorithm on 30 schizophrenia-related imaging genetics studies, representing 44 single-nucleotide polymorphisms at 26 gene loci investigated in 4682 subjects. To test whether analyses based on biological information would improve the convergence of results, gene ontology (GO) terms were used to group the findings from the published studies. We did not find any significant results for the main contrast. However, our analysis enrolling studies on genotype × diagnosis interaction yielded two clusters in the left temporal lobe and the medial orbitofrontal cortex. All other subanalyses did not yield any significant results. To gain insight into possible biological relationships between the genes implicated by these clusters, we mapped five of them to GO terms of the category "biological process" (AKT1, CNNM2, DISC1, DTNBP1, VAV3), then five to "cellular component" terms (AKT1, CNNM2, DISC1, DTNBP1, VAV3), and three to "molecular function" terms (AKT1, VAV3, ZNF804A). A subsequent cluster analysis identified representative, non-redundant subsets of semantically similar terms that aided a further interpretation. We regard this approach as a new option to systematically explore the richness of the literature in imaging genetics.
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Affiliation(s)
- Hildegard Janouschek
- Department of Neurology, RWTH Aachen University, Aachen, Germany.,Department of Psychiatry, Iowa Neuroscience Institute, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Claudia R Eickhoff
- Department of Psychiatry, Psychotherapy and Psychosomatics, RWTH Aachen University, Aachen, Germany.,Institute of Clinical Neuroscience and Medical Psychology, Medical Faculty, Heinrich Heine University, Düsseldorf, Germany.,Institute of Neuroscience and Medicine (Functional Architecture of the Brain; INM-1), Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Thomas W Mühleisen
- Institute of Neuroscience und Medicine (INM-1), Research Centre Jülich, Jülich, Germany.,Department of Biomedicine, University of Basel, Basel, Switzerland
| | - Simon B Eickhoff
- Institute of Systems Neuroscience, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany.,Institute of Neuroscience and Medicine, Brain & Behaviour (INM-7), Research Centre Jülich, Jülich, Germany
| | - Thomas Nickl-Jockschat
- Department of Psychiatry, Psychotherapy and Psychosomatics, RWTH Aachen University, Aachen, Germany. .,Jülich-Aachen Research Alliance Brain, Jülich/Aachen, Germany. .,Department of Psychiatry, Iowa Neuroscience Institute, Carver College of Medicine, University of Iowa, Iowa City, IA, USA.
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43
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Abstract
Schizophrenia patients commonly exhibit substantial and diffuse cognitive impairment. Evidence suggests that subtle cognitive deficits are already apparent in childhood and adolescence, many years prior to onset of psychosis. While there is almost unequivocal evidence of some degree of cognitive impairment in individuals who later develop schizophrenia, the literature remains inconclusive regarding the exact nature of this impairment and warrants careful review and interpretation. Meta-analytic findings suggest that individuals who later develop schizophrenia, but not related disorders, such as bipolar disorder, exhibit a premorbid IQ deficit of around 8 points. Several studies have also found evidence for premorbid deficits across most cognitive domains, such as language, processing speed and executive functions. Longitudinal studies, although rare, suggest that individuals who go on to develop schizophrenia may show a course of increasing cognitive impairment prior to onset of psychosis. While evidence regarding the etiology of premorbid deficits is scarce, common and rare genetic variants, as well as environmental factors such as obstetric complications and cannabis use may play an important role and warrant further examination. In this selected review, we give an overview of population-based studies on premorbid cognitive deficits in schizophrenia, with a special focus on evidence regarding the specificity, profile and course of these deficits.
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Affiliation(s)
- J Mollon
- Department of Psychosis Studies,Institute of Psychiatry, Psychology and Neuroscience, King's College London,London,UK
| | - A Reichenberg
- Department of Psychosis Studies,Institute of Psychiatry, Psychology and Neuroscience, King's College London,London,UK
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44
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Cognition, serum BDNF levels, and BDNF Val66Met polymorphism in type 2 diabetes patients and healthy controls. Oncotarget 2017; 9:3653-3662. [PMID: 29423073 PMCID: PMC5790490 DOI: 10.18632/oncotarget.23342] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2017] [Accepted: 11/23/2017] [Indexed: 01/28/2023] Open
Abstract
Background and aims Type 2 diabetes (T2DM) is associated with cognitive deficits. However, their pathophysiological mechanisms are still unknown. Recent study suggests that brain-derived neurotrophic factor (BDNF) is correlated with cognitive deficits in T2DM patients. This study was to determine whether altered serum BDNF levels and cognitive deficits depended on the BDNF Val66Met polymorphism in T2DM. Results The BDNF Val66Met polymorphism may not contribute directly to the susceptibility to T2DM. The total and nearly all index scores (all p < 0.01) except for the attention and visuospatial/constructional indexes (both p > 0.05) of RBANS were markedly decreased in T2DM compared with healthy controls. Serum BDNF levels were significantly lower in patients than that in controls (p < 0.001), and BDNF was positively associated with delayed memory in patients (p < 0.05). The Met variant was associated with worse delayed memory performance among T2DM patients but not among normal controls. Moreover, serum BDNF was positively associated with delayed memory among Met homozygote patients (β = 0.29, t = 2.21, p = 0.033), while serum BDNF was negatively associated the RBANS total score (β = –0.92, t = –3.40, p = 0.002) and language index (β = −1.17, t = –3.54, p = 0.001) among Val homozygote T2DM patients. Conclusions BDNF gene Val66Met variation may be associated with cognitive deficits in T2DM, especially with delayed memory. The association between lower BDNF serum levels and cognitive impairment in T2DM is dependent on the BDNF Val66Met polymorphism. Methods We recruited 311 T2DM patients and 346 healthy controls and compared them on the Repeatable Battery for the Assessment of Neuropsychological Status (RBANS), serum BDNF levels, and the BDNF Val66Met polymorphism.
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45
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McGregor C, Riordan A, Thornton J. Estrogens and the cognitive symptoms of schizophrenia: Possible neuroprotective mechanisms. Front Neuroendocrinol 2017; 47:19-33. [PMID: 28673758 DOI: 10.1016/j.yfrne.2017.06.003] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Revised: 06/25/2017] [Accepted: 06/27/2017] [Indexed: 02/07/2023]
Abstract
Schizophrenia is a complex neuropsychiatric illness with marked sex differences. Women have later onset and lesser symptoms, which has led to the hypothesis that estrogens are protective in schizophrenia. Cognitive dysfunction is a hallmark of the disease and the symptom most correlated with functional outcome. Here we describe a number of mechanisms by which estrogens may be therapeutic in schizophrenia, with a focus on cognitive symptoms. We review the relationship between estrogens and brain derived neurotrophic factor, neuroinflammation, NMDA receptors, GABA receptors, and luteinizing hormone. Exploring these pathways may enable novel treatments for schizophrenia and a greater understanding of this devastating disease.
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Affiliation(s)
- Claire McGregor
- Department of Neuroscience, Oberlin College, 119 Woodland St, Oberlin, OH 44074, USA.
| | - Alexander Riordan
- Department of Neuroscience, Oberlin College, 119 Woodland St, Oberlin, OH 44074, USA
| | - Janice Thornton
- Department of Neuroscience, Oberlin College, 119 Woodland St, Oberlin, OH 44074, USA
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46
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Park CH, Kim J, Namgung E, Lee DW, Kim GH, Kim M, Kim N, Kim TD, Kim S, Lyoo IK, Yoon S. The BDNF Val66Met Polymorphism Affects the Vulnerability of the Brain Structural Network. Front Hum Neurosci 2017; 11:400. [PMID: 28824404 PMCID: PMC5541016 DOI: 10.3389/fnhum.2017.00400] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Accepted: 07/19/2017] [Indexed: 12/22/2022] Open
Abstract
Val66Met, a naturally occurring polymorphism in the human brain-derived neurotrophic factor (BDNF) gene resulting in a valine (Val) to methionine (Met) substitution at codon 66, plays an important role in neuroplasticity. While the effect of the BDNF Val66Met polymorphism on local brain structures has previously been examined, its impact on the configuration of the graph-based white matter structural networks is yet to be investigated. In the current study, we assessed the effect of the BDNF polymorphism on the network properties and robustness of the graph-based white matter structural networks. Graph theory was employed to investigate the structural connectivity derived from white matter tractography in two groups, Val homozygotes (n = 18) and Met-allele carriers (n = 55). Although there were no differences in the global network measures including global efficiency, local efficiency, and modularity between the two genotype groups, we found the effect of the BDNF Val66Met polymorphism on the robustness properties of the white matter structural networks. Specifically, the white matter structural networks of the Met-allele carrier group showed higher vulnerability to targeted removal of central nodes as compared with those of the Val homozygote group. These findings suggest that the central role of the BDNF Val66Met polymorphism in regards to neuroplasticity may be associated with inherent differences in the robustness of the white matter structural network according to the genetic variants. Furthermore, greater susceptibility to brain disorders in Met-allele carriers may be understood as being due to their limited stability in white matter structural connectivity.
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Affiliation(s)
- Chang-Hyun Park
- Department of Psychiatry, Catholic University of Korea College of MedicineSeoul, South Korea
| | - Jungyoon Kim
- Ewha Brain Institute, Ewha Womans UniversitySeoul, South Korea.,Department of Brain and Cognitive Sciences, Ewha Womans UniversitySeoul, South Korea
| | - Eun Namgung
- Ewha Brain Institute, Ewha Womans UniversitySeoul, South Korea.,Department of Brain and Cognitive Sciences, Ewha Womans UniversitySeoul, South Korea
| | - Do-Wan Lee
- Ewha Brain Institute, Ewha Womans UniversitySeoul, South Korea
| | - Geon Ha Kim
- Ewha Brain Institute, Ewha Womans UniversitySeoul, South Korea.,Department of Neurology, School of Medicine, Ewha Womans UniversitySeoul, South Korea
| | - Myeongju Kim
- Ewha Brain Institute, Ewha Womans UniversitySeoul, South Korea.,Department of Brain and Cognitive Sciences, Ewha Womans UniversitySeoul, South Korea
| | - Nayeon Kim
- Ewha Brain Institute, Ewha Womans UniversitySeoul, South Korea.,Department of Brain and Cognitive Sciences, Ewha Womans UniversitySeoul, South Korea
| | - Tammy D Kim
- Ewha Brain Institute, Ewha Womans UniversitySeoul, South Korea
| | - Seunghee Kim
- Ewha Brain Institute, Ewha Womans UniversitySeoul, South Korea.,Department of Brain and Cognitive Sciences, Ewha Womans UniversitySeoul, South Korea
| | - In Kyoon Lyoo
- Ewha Brain Institute, Ewha Womans UniversitySeoul, South Korea.,Department of Brain and Cognitive Sciences, Ewha Womans UniversitySeoul, South Korea.,Graduate School of Pharmaceutical Sciences, Ewha Womans UniversitySeoul, South Korea
| | - Sujung Yoon
- Ewha Brain Institute, Ewha Womans UniversitySeoul, South Korea.,Department of Brain and Cognitive Sciences, Ewha Womans UniversitySeoul, South Korea
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47
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Azeredo LAD, De Nardi T, Levandowski ML, Tractenberg SG, Kommers-Molina J, Wieck A, Irigaray TQ, Silva IGD, Grassi-Oliveira R. The brain-derived neurotrophic factor (BDNF) gene Val66Met polymorphism affects memory performance in older adults. ACTA ACUST UNITED AC 2017; 39:90-94. [PMID: 28099630 PMCID: PMC7111449 DOI: 10.1590/1516-4446-2016-1980] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Accepted: 07/05/2016] [Indexed: 11/22/2022]
Abstract
Objective: Memory impairment is an important contributor to the reduction in quality of life experienced by older adults, and genetic risk factors seem to contribute to variance in age-related cognitive decline. Brain-derived neurotrophic factor (BDNF) is an important nerve growth factor linked with development and neural plasticity. The Val66Met polymorphism in the BDNF gene has been associated with impaired episodic memory in adults, but whether this functional variant plays a role in cognitive aging remains unclear. The purpose of this study was to investigate the effects of the BDNF Val66Met polymorphism on memory performance in a sample of elderly adults. Methods: Eighty-seven subjects aged > 55 years were recruited using a community-based convenience sampling strategy in Porto Alegre, Brazil. The logical memory subset of the Wechsler Memory Scale-Revised was used to assess immediate verbal recall (IVR), delayed verbal recall (DVR), and memory retention rate. Results: BDNF Met allele carriers had lower DVR scores (p = 0.004) and a decline in memory retention (p = 0.017) when compared to Val/Val homozygotes. However, we found no significant differences in IVR between the two groups (p = 0.088). Conclusion: These results support the hypothesis of the BDNF Val66Met polymorphism as a risk factor associated with cognitive impairment, corroborating previous findings in young and older adults.
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Affiliation(s)
- Lucas A de Azeredo
- Developmental Cognitive Neuroscience Lab (DCNL), Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil
| | - Tatiana De Nardi
- Developmental Cognitive Neuroscience Lab (DCNL), Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil.,Programa de Pós-Graduação em Psicologia, PUCRS, Porto Alegre, RS, Brazil
| | - Mateus L Levandowski
- Developmental Cognitive Neuroscience Lab (DCNL), Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil.,Programa de Pós-Graduação em Psicologia, PUCRS, Porto Alegre, RS, Brazil
| | - Saulo G Tractenberg
- Developmental Cognitive Neuroscience Lab (DCNL), Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil.,Programa de Pós-Graduação em Psicologia, PUCRS, Porto Alegre, RS, Brazil
| | - Julia Kommers-Molina
- Developmental Cognitive Neuroscience Lab (DCNL), Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil
| | - Andrea Wieck
- Developmental Cognitive Neuroscience Lab (DCNL), Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil.,Programa de Pós-Graduação em Gerontologia Biomédica, PUCRS, Porto Alegre, RS, Brazil
| | - Tatiana Q Irigaray
- Programa de Pós-Graduação em Psicologia, PUCRS, Porto Alegre, RS, Brazil
| | - Irênio G da Silva
- Programa de Pós-Graduação em Gerontologia Biomédica, PUCRS, Porto Alegre, RS, Brazil
| | - Rodrigo Grassi-Oliveira
- Developmental Cognitive Neuroscience Lab (DCNL), Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil.,Programa de Pós-Graduação em Psicologia, PUCRS, Porto Alegre, RS, Brazil
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48
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Zai G, Robbins TW, Sahakian BJ, Kennedy JL. A review of molecular genetic studies of neurocognitive deficits in schizophrenia. Neurosci Biobehav Rev 2017; 72:50-67. [DOI: 10.1016/j.neubiorev.2016.10.024] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 10/17/2016] [Accepted: 10/27/2016] [Indexed: 02/08/2023]
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49
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Abstract
OBJECTIVE The study aimed to explore cognitive outcomes after electroconvulsive therapy (ECT) depending on which version of common single nucleotide polymorphisms the patient expressed for brain-derived neurotrophic factor (BDNF) and catechol-O-methyltransferase (COMT). METHODS A total of 87 patients from the clinical ECT service in Aberdeen, Scotland, were included in the study. Cognitive function testing (using Spatial Recognition Memory task from the Cambridge Neuropsychological Test Automated Battery and Mini-Mental State Examination) and mood ratings (Montgomery-Åsberg Depression Rating Scale) were performed before ECT, after 4 treatments, at the end of ECT and 1 and 3 months after the end of treatment. These scores were compared depending on BDNF and COMT variant at each time point using the Student t test and using a time series generalized least squares random effects model. RESULTS No differences were found between the val and met versions of the BDNF or COMT polymorphism in either cognitive or mood outcomes at any time point during ECT treatment or up to 3 months of follow-up. CONCLUSIONS This study did not detect significant differences in cognitive or mood outcomes between patients who have the val66val or met versions of the BDNF polymorphism. Our results suggest that these polymorphisms will not be helpful in clinical practice for predicting cognitive outcomes after ECT.
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50
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Cao B, Bauer IE, Sharma AN, Mwangi B, Frazier T, Lavagnino L, Zunta-Soares GB, Walss-Bass C, Glahn DC, Kapczinski F, Nielsen DA, Soares JC. Reduced hippocampus volume and memory performance in bipolar disorder patients carrying the BDNF val66met met allele. J Affect Disord 2016; 198:198-205. [PMID: 27018938 PMCID: PMC5214589 DOI: 10.1016/j.jad.2016.03.044] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 03/08/2016] [Accepted: 03/09/2016] [Indexed: 12/11/2022]
Abstract
BACKGROUND Previous studies investigated the impact of brain-derived neurotrophic factor (BDNF) val66met (rs6265) on hippocampus volumes and neurocognition in bipolar disorders (BD), but the results were not consistent. This study aimed to investigate the effect of BDNF polymorphism on hippocampus volumes and memory performance in well-characterized adult populations diagnosed with type I BD (BD-I) and major depressive disorder (MDD) compared with healthy controls (HC). METHODS 48 BD-I patients, 33 MDD patients and 60 HC were genotyped for BDNF rs6265 using DNA isolated from white blood cells. Individuals with val/met and met/met genotypes were grouped as met carriers and compared to those with the val/val. Brain segmentations were obtained from structural magnetic resonance imaging (MRI) using the Freesurfer. Memory performance was assessed with the California Verbal Learning Task (CVLT). RESULTS We found a significant diagnosis effect and marginal interaction between diagnosis and BDNF genotype group for both hippocampus volumes and memory performance. BDNF met allele carrier BD patients had smaller hippocampus volumes and reduced performance on multiple CVLT scores compared to MDD patients and HC. CONCLUSIONS We provide strong evidence for the BDNF val66met polymorphism as a putative biological signature for the neuroanatomical and cognitive abnormalities commonly observed in BD patients.
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Affiliation(s)
- Bo Cao
- Department of Psychiatry and Behavioral Sciences, The University of Texas Health Science Center at Houston, Houston, TX, United States.
| | | | | | - Benson Mwangi
- Department of Psychiatry and Behavioral Sciences, The University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Thomas Frazier
- The Center for Pediatric Behavioral Health and Center for Autism, Cleveland Clinic, Cleveland, OH, United States
| | - Luca Lavagnino
- Department of Psychiatry and Behavioral Sciences, The University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Giovana B. Zunta-Soares
- Department of Psychiatry and Behavioral Sciences, The University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Consuelo Walss-Bass
- Department of Psychiatry and Behavioral Sciences, The University of Texas Health Science Center at Houston, Houston, TX, United States
| | - David C. Glahn
- The Olin Neuropsychiatry Research Center, Institute of Living, and Department of Psychiatry, Yale University School of Medicine, CT, United States
| | - Flavio Kapczinski
- Department of Psychiatry, Universidade Federal Rio Grande do Sul, Rua Ramiro Barcelos, 2350, 90035-903, Rio Grande do Sul, Brazil
| | - David A. Nielsen
- Department of Psychiatry and Behavioral Sciences, Michael E. DeBakey V.A. Medical Center, Baylor College of Medicine, Houston, TX, United States
| | - Jair C. Soares
- Department of Psychiatry and Behavioral Sciences, The University of Texas Health Science Center at Houston, Houston, TX, United States
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