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Berrocal-Rubio MA, Pawer YDJ, Dinevska M, De Paoli-Iseppi R, Widodo SS, Gleeson J, Rajab N, De Nardo W, Hallab J, Li A, Mantamadiotis T, Clark MB, Wells CA. Discovery of NRG1-VII: the myeloid-derived class of NRG1. BMC Genomics 2024; 25:814. [PMID: 39210279 PMCID: PMC11360300 DOI: 10.1186/s12864-024-10723-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Accepted: 08/19/2024] [Indexed: 09/04/2024] Open
Abstract
The growth factor Neuregulin-1 (NRG1) has pleiotropic roles in proliferation and differentiation of the stem cell niche in different tissues. It has been implicated in gut, brain and muscle development and repair. Six isoform classes of NRG1 and over 28 protein isoforms have been previously described. Here we report a new class of NRG1, designated NRG1-VII to denote that these NRG1 isoforms arise from a myeloid-specific transcriptional start site (TSS) previously uncharacterized. Long-read sequencing was used to identify eight high-confidence NRG1-VII transcripts. These transcripts presented major structural differences from one another, through the use of cassette exons and alternative stop codons. Expression of NRG1-VII was confirmed in primary human monocytes and tissue resident macrophages and induced pluripotent stem cell-derived macrophages (iPSC-derived macrophages). Isoform switching via cassette exon usage and alternate polyadenylation was apparent during monocyte maturation and macrophage differentiation. NRG1-VII is the major class expressed by the myeloid lineage, including tissue-resident macrophages. Analysis of public gene expression data indicates that monocytes and macrophages are a primary source of NRG1. The size and structure of class VII isoforms suggests that they may be more diffusible through tissues than other NRG1 classes. However, the specific roles of class VII variants in tissue homeostasis and repair have not yet been determined.
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Affiliation(s)
- Miguel A Berrocal-Rubio
- Department of Anatomy and Physiology, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Melbourne, Australia
| | - Yair David Joseph Pawer
- Department of Anatomy and Physiology, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Melbourne, Australia
| | - Marija Dinevska
- Department of Surgery, Royal Melbourne Hospital, The University of Melbourne, Melbourne, Australia
| | - Ricardo De Paoli-Iseppi
- Department of Anatomy and Physiology, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Melbourne, Australia
| | - Samuel S Widodo
- Department of Surgery, Royal Melbourne Hospital, The University of Melbourne, Melbourne, Australia
| | - Josie Gleeson
- Department of Anatomy and Physiology, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Melbourne, Australia
| | - Nadia Rajab
- Department of Anatomy and Physiology, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Melbourne, Australia
| | - Will De Nardo
- Department of Anatomy and Physiology, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Melbourne, Australia
| | - Jeannette Hallab
- Department of Anatomy and Physiology, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Melbourne, Australia
| | - Anran Li
- Department of Anatomy and Physiology, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Melbourne, Australia
| | - Theo Mantamadiotis
- Department of Surgery, Royal Melbourne Hospital, The University of Melbourne, Melbourne, Australia
- Department of Microbiology and Immunology, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Melbourne, Australia
| | - Michael B Clark
- Department of Anatomy and Physiology, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Melbourne, Australia
| | - Christine A Wells
- Department of Anatomy and Physiology, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Melbourne, Australia.
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Moradkhani A, Turki Jalil A, Mahmood Saleh M, Vanaki E, Daghagh H, Daghighazar B, Akbarpour Z, Ghahramani Almanghadim H. Correlation of rs35753505 polymorphism in Neuregulin 1 gene with psychopathology and intelligence of people with schizophrenia. Gene 2023; 867:147285. [PMID: 36905948 DOI: 10.1016/j.gene.2023.147285] [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: 06/08/2022] [Revised: 01/31/2023] [Accepted: 02/13/2023] [Indexed: 03/13/2023]
Abstract
BACKGROUND AND AIM Schizophrenia is one of the most severe psychiatric disorders. About 0.5 to 1% of the world's population suffers from this non-Mendelian disorder. Environmental and genetic factors seem to be involved in this disorder. In this article, we investigate the alleles and genotypic correlation of mononucleotide rs35753505 polymorphism of Neuregulin 1 (NRG1), one of the selected genes of schizophrenia, with psychopathology and intelligence. MATERIALS AND METHODS 102 independent and 98 healthy patients participated in this study. DNA was extracted by the salting out method and the polymorphism (rs35753505) were amplified by polymerase chain reaction (PCR). Sanger sequencing was performed on PCR products. Allele frequency analysis was performed using COCAPHASE software, and genotype analysis was performed using Clump22 software. RESULTS According to our study's statistical findings, all case samples from the three categories of men, women, and overall participants significantly differed from the control group in terms of the prevalence of allele C and the CC risk genotype. The rs35753505 polymorphism significantly raised Positive and Negative Syndrome Scale (PANSS) test results, according to a correlation analysis between the two variables. However, this polymorphism led to a significant decrease in overall intelligence in case samples compared to control samples. CONCLUSION In this study, it seems that the rs35753505 polymorphism of NRG1 gene has a significant role in the sample of patients with schizophrenia in Iran and also in psychopathology and intelligence disorders.
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Affiliation(s)
- Atefeh Moradkhani
- Department of Biology, Faculty of Science, Zanjan Branch, Islamic Azad University, Zanjan, Islamic Republic of Iran
| | - Abduladheem Turki Jalil
- Medical Laboratories Techniques Department, Al-Mustaqbal University College, Babylon, Hilla 51001, Iraq
| | - Marwan Mahmood Saleh
- Department of Biophysics, College of Applied Sciences, University Of Anbar, Iraq; Medical Laboratory Technology Department, College of Medical Technology, The Islamic University, Najaf, Iraq
| | - Elmira Vanaki
- Department of Animal Biotechnology, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran
| | - Hossein Daghagh
- Biochemistry Department of Biological Science, Kharazmi University Tehran, Iran
| | - Behrouz Daghighazar
- Department of Medical Genetics, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Zahra Akbarpour
- Department of Basic Science, Biotechnology Research Center, Tabriz Branch, Azad Islamic University, Tabriz, Iran
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de Sousa TR, Dt C, Novais F. Exploring the Hypothesis of a Schizophrenia and Bipolar Disorder Continuum: Biological, Genetic and Pharmacologic Data. CNS & NEUROLOGICAL DISORDERS DRUG TARGETS 2023; 22:161-171. [PMID: 34477537 DOI: 10.2174/1871527320666210902164235] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 07/19/2021] [Accepted: 08/08/2021] [Indexed: 12/16/2022]
Abstract
Present time nosology has its roots in Kraepelin's demarcation of schizophrenia and bipolar disorder. However, accumulating evidence has shed light on several commonalities between the two disorders, and some authors have advocated for the consideration of a disease continuum. Here, we review previous genetic, biological and pharmacological findings that provide the basis for this conceptualization. There is a cross-disease heritability, and they share single-nucleotide polymorphisms in some common genes. EEG and imaging patterns have a number of similarities, namely reduced white matter integrity and abnormal connectivity. Dopamine, serotonin, GABA and glutamate systems have dysfunctional features, some of which are identical among the disorders. Finally, cellular calcium regulation and mitochondrial function are, also, impaired in the two.
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Affiliation(s)
- Teresa Reynolds de Sousa
- Department of Neurosciences and Mental Health, Centro Hospitalar Universitário Lisboa Norte (CHULN), Hospital de Santa Maria, Lisbon, Portugal
| | - Correia Dt
- Department of Neurosciences and Mental Health, Centro Hospitalar Universitário Lisboa Norte (CHULN), Hospital de Santa Maria, Lisbon, Portugal
- Faculdade de Medicina da Universidade de Lisboa, Lisboa, Portugal
- ISAMB - Instituto de Saúde Ambiental, Lisboa, Portugal
| | - Filipa Novais
- Department of Neurosciences and Mental Health, Centro Hospitalar Universitário Lisboa Norte (CHULN), Hospital de Santa Maria, Lisbon, Portugal
- Faculdade de Medicina da Universidade de Lisboa, Lisboa, Portugal
- ISAMB - Instituto de Saúde Ambiental, Lisboa, Portugal
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Hu L, Zhang L. Adult neural stem cells and schizophrenia. World J Stem Cells 2022; 14:219-230. [PMID: 35432739 PMCID: PMC8968214 DOI: 10.4252/wjsc.v14.i3.219] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 06/18/2021] [Accepted: 03/07/2022] [Indexed: 02/06/2023] Open
Abstract
Schizophrenia (SCZ) is a devastating and complicated mental disorder accompanied by variable positive and negative symptoms and cognitive deficits. Although many genetic risk factors have been identified, SCZ is also considered as a neurodevelopmental disorder. Elucidation of the pathogenesis and the development of treatment is challenging because complex interactions occur between these genetic risk factors and environment in essential neurodevelopmental processes. Adult neural stem cells share a lot of similarities with embryonic neural stem cells and provide a promising model for studying neuronal development in adulthood. These adult neural stem cells also play an important role in cognitive functions including temporal and spatial memory encoding and context discrimination, which have been shown to be closely linked with many psychiatric disorders, such as SCZ. Here in this review, we focus on the SCZ risk genes and the key components in related signaling pathways in adult hippocampal neural stem cells and summarize their roles in adult neurogenesis and animal behaviors. We hope that this would be helpful for the understanding of the contribution of dysregulated adult neural stem cells in the pathogenesis of SCZ and for the identification of potential therapeutic targets, which could facilitate the development of novel medication and treatment.
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Affiliation(s)
- Ling Hu
- Department of Laboratory Animal Science and Institutes of Brain Science, Fudan University, Shanghai 200032, China
| | - Lei Zhang
- Shanghai Yangzhi Rehabilitation Hospital (Shanghai Sunshine Rehabilitation Center) and Department of Anatomy and Neurobiology, Tongji University School of Medicine, Shanghai 200092, China
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Li W, Zhou FC, Zhang L, Ng CH, Ungvari GS, Li J, Xiang YT. Comparison of cognitive dysfunction between schizophrenia and bipolar disorder patients: A meta-analysis of comparative studies. J Affect Disord 2020; 274:652-661. [PMID: 32663999 DOI: 10.1016/j.jad.2020.04.051] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 04/19/2020] [Accepted: 04/27/2020] [Indexed: 01/01/2023]
Abstract
OBJECTIVE Cognitive dysfunction is common in both schizophrenia and bipolar disorder. This is a meta-analysis of studies that compared cognitive dysfunction between schizophrenia and bipolar disorder. METHODS Both international and Chinese databases were systematically searched. Studies that compared cognitive function between schizophrenia and bipolar disorder with the MATRICS Consensus Cognitive Battery (MCCB) were analyzed using the random-effects model. RESULTS Twelve studies with 9,518 participants (4,411 schizophrenia and 5,107 bipolar patients) were included in the analyses. Schizophrenia patients performed significantly worse than bipolar patients on the MCCB total scores with a large effect size (SMD=-0.80, 95%CI: -1.21 to -0.39), as well as on all the 7 subscale scores; attention (SMD=-2.56, 95%CI: -3.55 to -1.57) and social cognition (SMD=-0.86, 95%CI: -1.13 to -0.58) with large effect sizes; and speed of processing (SMD=-0.75, 95%CI: -1.00 to -0.49), working memory (SMD=-0.68, 95%CI: -0.91 to -0.45), verbal learning (SMD=-0.78, 95%CI: -0.95 to -0.61), visual learning (SMD=-0.65, 95%CI: -0.83 to -0.48), and reasoning and problem solving (SMD=-0.61, 95%CI: -0.93 to -0.29) with medium effect sizes. CONCLUSION Compared to bipolar patients, patients with schizophrenia had more severe cognitive dysfunction in this meta-analysis, particularly in attention and social cognition. Timely assessment and treatment of cognitive dysfunction should be part of standard management protocols in both schizophrenia and bipolar disorder.
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Affiliation(s)
- Wen Li
- Unit of Psychiatry, Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Macao SAR, China; Center for Cognition and Brain Sciences, University of Macau, Macao SAR, China
| | - Fu-Chun Zhou
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental Disorders, Beijing Anding Hospital & the Advanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing, China
| | - Ling Zhang
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental Disorders, Beijing Anding Hospital & the Advanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing, China
| | - Chee H Ng
- Department of Psychiatry, The Melbourne Clinic and St Vincent's Hospital, University of Melbourne, Richmond, Victoria, Australia
| | - Gabor S Ungvari
- Division of Psychiatry, School of Medicine, University of Western Australia, Perth, Australia; University of Notre Dame Australia, Fremantle, Australia
| | - Jun Li
- State Key Laboratory of Cognitive Neuroscience and Learning & IDG/McGovern Institute for Brain Research, Beijing Normal University, China
| | - Yu-Tao Xiang
- Unit of Psychiatry, Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Macao SAR, China; Center for Cognition and Brain Sciences, University of Macau, Macao SAR, China.
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Chen WY, Chen JC, Cheng YC, Liu HC, Kuo PH, Huang MC. Gene polymorphisms of cognitive function in patients with bipolar disorder: A systematic review and meta-analysis. TAIWANESE JOURNAL OF PSYCHIATRY 2020. [DOI: 10.4103/tpsy.tpsy_2_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Lantieri F, Gimelli S, Viaggi C, Stathaki E, Malacarne M, Santamaria G, Grossi A, Mosconi M, Sloan-Béna F, Prato AP, Coviello D, Ceccherini I. Copy number variations in candidate genomic regions confirm genetic heterogeneity and parental bias in Hirschsprung disease. Orphanet J Rare Dis 2019; 14:270. [PMID: 31767031 PMCID: PMC6878652 DOI: 10.1186/s13023-019-1205-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Accepted: 09/13/2019] [Indexed: 11/26/2022] Open
Abstract
Background Hirschsprung Disease (HSCR) is a congenital defect of the intestinal innervations characterized by complex inheritance. Many susceptibility genes including RET, the major HSCR gene, and several linked regions and associated loci have been shown to contribute to disease pathogenesis. Nonetheless, a proportion of patients still remains unexplained. Copy Number Variations (CNVs) have already been involved in HSCR, and for this reason we performed Comparative Genomic Hybridization (CGH), using a custom array with high density probes. Results A total of 20 HSCR candidate regions/genes was tested in 55 sporadic patients and four patients with already known chromosomal aberrations. Among 83 calls, 12 variants were experimentally validated, three of which involving the HSCR crucial genes SEMA3A/3D, NRG1, and PHOX2B. Conversely RET involvement in HSCR does not seem to rely on the presence of CNVs while, interestingly, several gains and losses did co-occur with another RET defect, thus confirming that more than one predisposing event is necessary for HSCR to develop. New loci were also shown to be involved, such as ALDH1A2, already found to play a major role in the enteric nervous system. Finally, all the inherited CNVs were of maternal origin. Conclusions Our results confirm a wide genetic heterogeneity in HSCR occurrence and support a role of candidate genes in expression regulation and cell signaling, thus contributing to depict further the molecular complexity of the genomic regions involved in the Enteric Nervous System development. The observed maternal transmission bias for HSCR associated CNVs supports the hypothesis that in females these variants might be more tolerated, requiring additional alterations to develop HSCR disease.
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Affiliation(s)
- Francesca Lantieri
- Dipartimento di Scienze della Salute, sezione di Biostatistica, Universita' degli Studi di Genova, 16132, Genoa, Italy
| | - Stefania Gimelli
- Department of Medical Genetic and Laboratories, University Hospitals of Geneva, Geneva, Switzerland
| | - Chiara Viaggi
- S.C. Laboratorio Genetica Umana, Ospedali Galliera, Genoa, Italy
| | - Elissavet Stathaki
- Department of Medical Genetic and Laboratories, University Hospitals of Geneva, Geneva, Switzerland
| | - Michela Malacarne
- S.C. Laboratorio Genetica Umana, Ospedali Galliera, Genoa, Italy.,Present address: U.O.C. Laboratorio di Genetica Umana, IRCCS Istituto Giannina Gaslini, Genoa, 16148, Italy
| | - Giuseppe Santamaria
- U.O.C. Genetica Medica, IRCCS, Istituto Giannina Gaslini, 16148, Genoa, Italy
| | - Alice Grossi
- U.O.C. Genetica Medica, IRCCS, Istituto Giannina Gaslini, 16148, Genoa, Italy
| | - Manuela Mosconi
- UOC Chirurgia Pediatrica, Istituto Giannina Gaslini, 16148, Genoa, Italy
| | - Frédérique Sloan-Béna
- Department of Medical Genetic and Laboratories, University Hospitals of Geneva, Geneva, Switzerland
| | - Alessio Pini Prato
- UOC Chirurgia Pediatrica, Istituto Giannina Gaslini, 16148, Genoa, Italy.,Present address: Children Hospital, AON SS Antonio e Biagio e Cesare Arrigo, Alessandria, Italy
| | - Domenico Coviello
- S.C. Laboratorio Genetica Umana, Ospedali Galliera, Genoa, Italy.,Present address: U.O.C. Laboratorio di Genetica Umana, IRCCS Istituto Giannina Gaslini, Genoa, 16148, Italy
| | - Isabella Ceccherini
- U.O.C. Genetica Medica, IRCCS, Istituto Giannina Gaslini, 16148, Genoa, Italy.
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Wang D, Guo T, Guo Q, Zhang S, Zhang J, Luo J. The Association Between Schizophrenia Risk Variants and Creativity in Healthy Han Chinese Subjects. Front Psychol 2019; 10:2218. [PMID: 31649580 PMCID: PMC6792478 DOI: 10.3389/fpsyg.2019.02218] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Accepted: 09/17/2019] [Indexed: 11/14/2022] Open
Abstract
Although previous evidence has suggested that there is a genetic link between schizophrenia and creativity, the specific genetic variants that underlie the link are still largely unknown. To further explore the potential genetic link between schizophrenia and creativity, in a sample of 580 healthy Han Chinese subjects, this study aimed to (1) validate the role of Neuregulin 1 (NRG1) rs6994992 (one schizophrenia risk variant that has been previously linked to creativity in the European population) in the relationship between schizophrenia and creativity and (2) explore the associations between 10 other schizophrenia risk variants and creativity. For NRG1 rs6994992, the result validated its association with creativity measures. However, since NRG1 rs6994992 is not a schizophrenia risk variant in the Han Chinese population, the validated association suggested that ethnic difference may exist in the relationship between NRG1 rs6994992, schizophrenia and creativity. For other schizophrenia risk variants, the result only demonstrated a nominal association between ZNF536 rs2053079 and creativity measures which would not survive correction for multiple testing. No association between polygenic risk score for these 10 schizophrenia risk variants and creativity measures was observed. In conclusion, this study provides limited evidence for the associations between these schizophrenia risk variants and creativity in healthy Han Chinese subjects. Future studies are warranted to better understand the potential genetic link between schizophrenia and creativity.
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Affiliation(s)
- Dan Wang
- Beijing Key Laboratory of Learning and Cognition, Department of Psychology, The Collaborative Innovation Center for Capital Education Development, Capital Normal University, Beijing, China
| | - Tingting Guo
- Beijing Gese Technology Co., Ltd., Beijing, China
| | - Qi Guo
- Beijing Key Laboratory of Learning and Cognition, Department of Psychology, The Collaborative Innovation Center for Capital Education Development, Capital Normal University, Beijing, China
| | - Shun Zhang
- Department of Psychology, Shandong Normal University, Jinan, China
| | - Jinghuan Zhang
- Department of Psychology, Shandong Normal University, Jinan, China
| | - Jing Luo
- Beijing Key Laboratory of Learning and Cognition, Department of Psychology, The Collaborative Innovation Center for Capital Education Development, Capital Normal University, Beijing, China
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Kataria H, Alizadeh A, Karimi-Abdolrezaee S. Neuregulin-1/ErbB network: An emerging modulator of nervous system injury and repair. Prog Neurobiol 2019; 180:101643. [PMID: 31229498 DOI: 10.1016/j.pneurobio.2019.101643] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Revised: 06/07/2019] [Accepted: 06/11/2019] [Indexed: 12/20/2022]
Abstract
Neuregulin-1 (Nrg-1) is a member of the Neuregulin family of growth factors with essential roles in the developing and adult nervous system. Six different types of Nrg-1 (Nrg-1 type I-VI) and over 30 isoforms have been discovered; however, their specific roles are not fully determined. Nrg-1 signals through a complex network of protein-tyrosine kinase receptors, ErbB2, ErbB3, ErbB4 and multiple intracellular pathways. Genetic and pharmacological studies of Nrg-1 and ErbB receptors have identified a critical role for Nrg-1/ErbB network in neurodevelopment including neuronal migration, neural differentiation, myelination as well as formation of synapses and neuromuscular junctions. Nrg-1 signaling is best known for its characterized role in development and repair of the peripheral nervous system (PNS) due to its essential role in Schwann cell development, survival and myelination. However, our knowledge of the impact of Nrg-1/ErbB on the central nervous system (CNS) has emerged in recent years. Ongoing efforts have uncovered a multi-faceted role for Nrg-1 in regulating CNS injury and repair processes. In this review, we provide a timely overview of the most recent updates on Nrg-1 signaling and its role in nervous system injury and diseases. We will specifically highlight the emerging role of Nrg-1 in modulating the glial and immune responses and its capacity to foster neuroprotection and remyelination in CNS injury. Nrg-1/ErbB network is a key regulatory pathway in the developing nervous system; therefore, unraveling its role in neuropathology and repair can aid in development of new therapeutic approaches for nervous system injuries and associated disorders.
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Affiliation(s)
- Hardeep Kataria
- Department of Physiology and Pathophysiology, Regenerative Medicine Program, Spinal Cord Research Centre, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Arsalan Alizadeh
- Department of Physiology and Pathophysiology, Regenerative Medicine Program, Spinal Cord Research Centre, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Soheila Karimi-Abdolrezaee
- Department of Physiology and Pathophysiology, Regenerative Medicine Program, Spinal Cord Research Centre, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada.
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Wang T, Liu Y, Liu Q, Cummins S, Zhao M. Integrative proteomic analysis reveals potential high-frequency alternative open reading frame-encoded peptides in human colorectal cancer. Life Sci 2018; 215:182-189. [PMID: 30419281 DOI: 10.1016/j.lfs.2018.11.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 10/31/2018] [Accepted: 11/08/2018] [Indexed: 11/30/2022]
Abstract
Identification of alternative open reading frame-encoded peptides (AEPs) for the diagnosis of colorectal cancer at the proteome level is largely unexplored because of a lack of comprehensive proteomics data. Here, we performed a comprehensive integrative analysis of mass spectral data published by Clinical Proteomic Tumor Analysis Consortium and characterized 93 high-confident AEPs encoded within 75 genes. There are four cancer-related genes appeared to have AEPs identified frequently in >20 out of 95 colorectal cancer samples, including ABCF2, AR, RBM10 and NRG1. Further network analysis of the identified AEPs found the enrichment of novel AEPs within hormone androgen receptor and a highly-modularised network with 42 genes associated with patient survival. Our results not only suggested a mechanistic view of how AEPs work in cancer progression, but also shed light on somatic amino acid mutations in AEPs, which might be overlooked previously because of their low frequencies. In particular, potential high-frequency mutations in 77 samples associated with EDARADD may contribute to the discovery of new biomarkers and the development of innovative therapeutic approaches.
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Affiliation(s)
- Tianfang Wang
- School of Science and Engineering, University of the Sunshine Coast, Maroochydore DC, Queensland, 4558, Australia.
| | - Yining Liu
- The School of Public Health, Institute for Chemical Carcinogenesis, Guangzhou Medical University, 195 Dongfengxi Road, Guangzhou 510182, China
| | - Qi Liu
- Department of Biomedical Informatics, School of Medicine, Vanderbilt University, Nashville, TN 37232, United States; Center for Quantitative Sciences, School of Medicine, Vanderbilt University, Nashville, TN 37232, United States
| | - Scott Cummins
- School of Science and Engineering, University of the Sunshine Coast, Maroochydore DC, Queensland, 4558, Australia
| | - Min Zhao
- School of Science and Engineering, University of the Sunshine Coast, Maroochydore DC, Queensland, 4558, Australia.
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Gene polymorphisms and response to transcranial direct current stimulation for auditory verbal hallucinations in schizophrenia. Acta Neuropsychiatr 2018; 30:218-225. [PMID: 29559020 DOI: 10.1017/neu.2018.4] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
OBJECTIVE Recent observations demonstrate a significant ameliorative effect of add-on transcranial direct current stimulation (tDCS) on auditory verbal hallucinations (AVHs) in schizophrenia. Of the many SNPs, NRG1 rs35753505 and catechol-o-methyl transferase (COMT) rs4680 polymorphisms have shown to have a strong association with neuroplasticity effect in schizophrenia. METHODS Schizophrenia patients (n=32) with treatment resistant auditory hallucinations were administered with an add-on tDCS. The COMT (rs4680) and NRG1 (rs35753505) genotypes were determined. The COMT genotypes were categorised into Val group (GG; n=15) and Met group (GG/AG; n=17) and NRG1 genotypes were categorised into AA group (n=12) and AG/GG group (n=20). RESULTS The reduction in auditory hallucination sub-scale score was significantly affected by COMT-GG genotype [Time×COMT interaction: F(1,28)=10.55, p=0.003, ɳ2=0.27]. Further, COMT-GG effect was epistatically influenced by the co-occurrence of NRG1-AA genotype [Time×COMT×NRG1 interaction: F(1,28)=8.09, p=0.008, ɳ2=0.22]. Irrespective of genotype, females showed better tDCS response than males [Time×Sex interaction: F(1,21)=4.67, p=0.04, ɳ2=0.18]. CONCLUSION COMT-GG and NRG1-AA genotypes aid the tDCS-induced improvement in AVHs in schizophrenia patients. Our preliminary observations need replication and further systematic research to understand the neuroplastic gene determinants that modulate the effect of tDCS.
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Selten M, van Bokhoven H, Nadif Kasri N. Inhibitory control of the excitatory/inhibitory balance in psychiatric disorders. F1000Res 2018; 7:23. [PMID: 29375819 PMCID: PMC5760969 DOI: 10.12688/f1000research.12155.1] [Citation(s) in RCA: 126] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/21/2017] [Indexed: 12/21/2022] Open
Abstract
Neuronal networks consist of different types of neurons that all play their own role in order to maintain proper network function. The two main types of neurons segregate in excitatory and inhibitory neurons, which together regulate the flow of information through the network. It has been proposed that changes in the relative strength in these two opposing forces underlie the symptoms observed in psychiatric disorders, including autism and schizophrenia. Here, we review the role of alterations to the function of the inhibitory system as a cause of psychiatric disorders. First, we explore both patient and post-mortem evidence of inhibitory deficiency. We then discuss the function of different interneuron subtypes in the network and focus on the central role of a specific class of inhibitory neurons, parvalbumin-positive interneurons. Finally, we discuss genes known to be affected in different disorders and the effects that mutations in these genes have on the inhibitory system in cortex and hippocampus. We conclude that alterations to the inhibitory system are consistently identified in animal models of psychiatric disorders and, more specifically, that mutations affecting the function of parvalbumin-positive interneurons seem to play a central role in the symptoms observed in these disorders.
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Affiliation(s)
- Martijn Selten
- Centre for Developmental Neurobiology, Institute of Psychiatry, Psychology and Neuroscience, New Hunt's House, Guy's Campus, King's College London, London, SE1 1UL, UK.,MRC Centre for Neurodevelopmental Disorders, New Hunt's House, Guy's Campus, King's College London, London, SE1 1UL, UK.,Department of Human Genetics & Department of Cognitive Neuroscience, Radboudumc, Geert Grooteplein 10, Box 9101, 6500 HB Nijmegen, Netherlands.,Donders Institute for Brain, Cognition, and Behaviour, Centre for Neuroscience, 6525 AJ Nijmegen, Netherlands
| | - Hans van Bokhoven
- Department of Human Genetics & Department of Cognitive Neuroscience, Radboudumc, Geert Grooteplein 10, Box 9101, 6500 HB Nijmegen, Netherlands.,Donders Institute for Brain, Cognition, and Behaviour, Centre for Neuroscience, 6525 AJ Nijmegen, Netherlands
| | - Nael Nadif Kasri
- Department of Human Genetics & Department of Cognitive Neuroscience, Radboudumc, Geert Grooteplein 10, Box 9101, 6500 HB Nijmegen, Netherlands.,Donders Institute for Brain, Cognition, and Behaviour, Centre for Neuroscience, 6525 AJ Nijmegen, Netherlands
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Mahapatra A, Khandelwal SK, Sharan P, Garg A, Mishra NK. Diffusion tensor imaging tractography study in bipolar disorder patients compared to first-degree relatives and healthy controls. Psychiatry Clin Neurosci 2017; 71:706-715. [PMID: 28419638 DOI: 10.1111/pcn.12530] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Revised: 04/07/2017] [Accepted: 04/10/2017] [Indexed: 11/28/2022]
Abstract
AIM We aimed to compare white matter structural changes in specific tracts by diffusion tensor imaging (DTI) tractography in patients with bipolar disorder (BD) I, non-ill first-degree relatives (FDR) of the patients, and healthy controls (HC). METHODS In a cross-sectional study, we studied right-handed subjects consisting of 16 euthymic BD I patients, 15 FDR, and 15 HC. The anterior thalamic radiation, uncinate fasciculus, corpus callosum, and cingulum bundle were reconstructed by DTI tractography. Mean fractional anisotropy (FA) and apparent diffusion coefficient (ADC) values were compared for group differences followed by post-hoc analysis. RESULTS The three groups did not differ in terms of sociodemographic variables. There were significant group differences in the FA values among the BD I patients, their FDR, and the HC for the corpus callosum, the dorsal part of the right cingulum bundle, the hippocampal part of the cingulum bundle bilaterally, and the uncinate fasciculus (P < 0.001). The FA values in the patients were significantly lower than in controls, and FDR also showed similar differences; however, they were smaller than those in patients. No significant difference was found between the groups for FA values of the dorsal part of the left cingulum bundle and anterior thalamic radiation. Significant differences were present for ADC values among the groups for the corpus callosum, the dorsal and hippocampal parts of the cingulum, anterior thalamic radiation, and uncinate fasciculus bilaterally (P < 0.01). The FA and ADC values did not correlate significantly with age or any clinical variables. CONCLUSION These findings suggest that BD patients and their FDR show alterations in microstructural integrity of white matter tracts, compared to the healthy population.
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Affiliation(s)
- Ananya Mahapatra
- Department of Psychiatry & National Drug Dependence Treatment Centre, All India Institute of Medical Sciences, New Delhi, India
| | - Sudhir K Khandelwal
- Department of Psychiatry & National Drug Dependence Treatment Centre, All India Institute of Medical Sciences, New Delhi, India
| | - Pratap Sharan
- Department of Psychiatry & National Drug Dependence Treatment Centre, All India Institute of Medical Sciences, New Delhi, India
| | - Ajay Garg
- Department of Neuroradiology, All India Institute of Medical Sciences, New Delhi, India
| | - Nalini K Mishra
- Department of Neuroradiology, All India Institute of Medical Sciences, New Delhi, India
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Pereira LP, Köhler CA, de Sousa RT, Solmi M, de Freitas BP, Fornaro M, Machado-Vieira R, Miskowiak KW, Vieta E, Veronese N, Stubbs B, Carvalho AF. The relationship between genetic risk variants with brain structure and function in bipolar disorder: A systematic review of genetic-neuroimaging studies. Neurosci Biobehav Rev 2017; 79:87-109. [DOI: 10.1016/j.neubiorev.2017.05.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Revised: 04/27/2017] [Accepted: 05/01/2017] [Indexed: 12/21/2022]
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Disrupted hippocampal neuregulin-1/ErbB3 signaling and dentate gyrus granule cell alterations in suicide. Transl Psychiatry 2017; 7:e1161. [PMID: 28675388 PMCID: PMC5538115 DOI: 10.1038/tp.2017.132] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 04/28/2017] [Accepted: 05/04/2017] [Indexed: 12/29/2022] Open
Abstract
Neuregulin-1 (NRG1) and ErbB receptors have been associated with psychopathology, and NRG1-ErbB3 signaling has been shown to increase hippocampal neurogenesis and induce antidepressant-like effects. In this study, we aimed to determine whether deficits in NRG1 or ErbBs might be present in the hippocampus of suicide completers. In well-characterized postmortem hippocampal samples from suicides and matched sudden-death controls, we assessed gene expression and methylation using qRT-PCR and EpiTYPER, respectively. Moreover, in hippocampal tissues stained with cresyl violet, stereology was used to quantify numbers of granule cells and of glia. Granule cell body size was examined with a nucleator probe, and granule cell layer volume with a Cavalieri probe. Unmedicated suicides showed sharply decreased hippocampal ErbB3 expression and decreased numbers of ErbB3-expressing granule cell neurons in the anterior dentate gyrus; a phenomenon seemingly reversed by antidepressant treatment. Furthermore, we found ErbB3 expression to be significantly decreased in the dentate gyrus of adult mice exposed to chronic social defeat stress. Taken together, these results reveal novel suicidal endophenotypes in the hippocampus, as well as a putative etiological mechanism underlying suicidality, and suggest that antidepressant or NRG1 treatment may reverse a potential deficit in anterior dentate gyrus granule cell neurons in individuals at risk of dying by suicide.
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A Novel Relationship for Schizophrenia, Bipolar, and Major Depressive Disorder. Part 8: a Hint from Chromosome 8 High Density Association Screen. Mol Neurobiol 2016; 54:5868-5882. [DOI: 10.1007/s12035-016-0102-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Accepted: 09/06/2016] [Indexed: 12/21/2022]
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17
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Mostaid MS, Lloyd D, Liberg B, Sundram S, Pereira A, Pantelis C, Karl T, Weickert CS, Everall IP, Bousman CA. Neuregulin-1 and schizophrenia in the genome-wide association study era. Neurosci Biobehav Rev 2016; 68:387-409. [DOI: 10.1016/j.neubiorev.2016.06.001] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 05/30/2016] [Accepted: 06/03/2016] [Indexed: 12/22/2022]
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18
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Hou L, Bergen SE, Akula N, Song J, Hultman CM, Landén M, Adli M, Alda M, Ardau R, Arias B, Aubry JM, Backlund L, Badner JA, Barrett TB, Bauer M, Baune BT, Bellivier F, Benabarre A, Bengesser S, Berrettini WH, Bhattacharjee AK, Biernacka JM, Birner A, Bloss CS, Brichant-Petitjean C, Bui ET, Byerley W, Cervantes P, Chillotti C, Cichon S, Colom F, Coryell W, Craig DW, Cruceanu C, Czerski PM, Davis T, Dayer A, Degenhardt F, Del Zompo M, DePaulo JR, Edenberg HJ, Étain B, Falkai P, Foroud T, Forstner AJ, Frisén L, Frye MA, Fullerton JM, Gard S, Garnham JS, Gershon ES, Goes FS, Greenwood TA, Grigoroiu-Serbanescu M, Hauser J, Heilbronner U, Heilmann-Heimbach S, Herms S, Hipolito M, Hitturlingappa S, Hoffmann P, Hofmann A, Jamain S, Jiménez E, Kahn JP, Kassem L, Kelsoe JR, Kittel-Schneider S, Kliwicki S, Koller DL, König B, Lackner N, Laje G, Lang M, Lavebratt C, Lawson WB, Leboyer M, Leckband SG, Liu C, Maaser A, Mahon PB, Maier W, Maj M, Manchia M, Martinsson L, McCarthy MJ, McElroy SL, McInnis MG, McKinney R, Mitchell PB, Mitjans M, Mondimore FM, Monteleone P, Mühleisen TW, Nievergelt CM, Nöthen MM, Novák T, Nurnberger JI, Nwulia EA, Ösby U, Pfennig A, Potash JB, Propping P, Reif A, Reininghaus E, Rice J, Rietschel M, Rouleau GA, Rybakowski JK, Schalling M, Scheftner WA, Schofield PR, Schork NJ, Schulze TG, Schumacher J, Schweizer BW, Severino G, Shekhtman T, Shilling PD, Simhandl C, Slaney CM, Smith EN, Squassina A, Stamm T, Stopkova P, Streit F, Strohmaier J, Szelinger S, Tighe SK, Tortorella A, Turecki G, Vieta E, Volkert J, Witt SH, Wright A, Zandi PP, Zhang P, Zollner S, McMahon FJ. Genome-wide association study of 40,000 individuals identifies two novel loci associated with bipolar disorder. Hum Mol Genet 2016; 25:3383-3394. [PMID: 27329760 PMCID: PMC5179929 DOI: 10.1093/hmg/ddw181] [Citation(s) in RCA: 135] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Revised: 05/23/2016] [Accepted: 06/09/2016] [Indexed: 12/31/2022] Open
Abstract
Bipolar disorder (BD) is a genetically complex mental illness characterized by severe oscillations of mood and behaviour. Genome-wide association studies (GWAS) have identified several risk loci that together account for a small portion of the heritability. To identify additional risk loci, we performed a two-stage meta-analysis of >9 million genetic variants in 9,784 bipolar disorder patients and 30,471 controls, the largest GWAS of BD to date. In this study, to increase power we used ∼2,000 lithium-treated cases with a long-term diagnosis of BD from the Consortium on Lithium Genetics, excess controls, and analytic methods optimized for markers on the X-chromosome. In addition to four known loci, results revealed genome-wide significant associations at two novel loci: an intergenic region on 9p21.3 (rs12553324, P = 5.87 × 10 - 9; odds ratio (OR) = 1.12) and markers within ERBB2 (rs2517959, P = 4.53 × 10 - 9; OR = 1.13). No significant X-chromosome associations were detected and X-linked markers explained very little BD heritability. The results add to a growing list of common autosomal variants involved in BD and illustrate the power of comparing well-characterized cases to an excess of controls in GWAS.
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Affiliation(s)
- Liping Hou
- Intramural Research Program, National Institute of Mental Health, National Institutes of Health,U.S. Department of Health & Human Services, Bethesda, MD, USA
| | - Sarah E Bergen
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
- Stanley Center for Psychiatric Research, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Nirmala Akula
- Intramural Research Program, National Institute of Mental Health, National Institutes of Health,U.S. Department of Health & Human Services, Bethesda, MD, USA
| | - Jie Song
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Christina M Hultman
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Mikael Landén
- Institute of Neuroscience and Physiology, The Sahlgrenska Academy at Gothenburg University, Gothenburg, Sweden
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Mazda Adli
- Department of Psychiatry and Psychotherapy, Charité - Universitätsmedizin Berlin, Campus Charité Mitte, Berlin, Germany
| | - Martin Alda
- Department of Psychiatry, Dalhousie University, Halifax, Canada
| | - Raffaella Ardau
- Unit of Clinical Pharmacology, Hospital University Agency of Cagliari, Cagliari, Italy
| | - Bárbara Arias
- Department of Biologia Animal, Unitat d'Antropologia (Dp. Biología Animal), Facultat de Biologia and Institut de Biomedicina (IBUB), Universitat de Barcelona, CIBERSAM, Barcelona, Spain
| | - Jean-Michel Aubry
- Department of Mental Health and Psychiatry, Mood Disorders Unit, Geneva University Hospitals, Geneva, Switzerland
| | - Lena Backlund
- Department of Molecular Medicine and Surgery, Karolinska Institutet and Center for Molecular Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Judith A Badner
- Department of Psychiatry and Behavioral Neuroscience, University of Chicago, Chicago, IL, USA
| | | | - Michael Bauer
- Department of Psychiatry and Psychotherapy, University Hospital Carl Gustav Carus, Technische Universität, Dresden, Germany
| | - Bernhard T Baune
- Discipline of Psychiatry, University of Adelaide, Adelaide, Australia
| | - Frank Bellivier
- INSERM UMR-S 1144 - Université Paris Diderot. Pôle de Psychiatrie, AP-HP, Groupe Hospitalier Lariboisière-F. Widal, Paris, France
| | - Antonio Benabarre
- Bipolar Disorder Program, Institute of Neuroscience, Hospital Clinic, University of Barcelona, IDIBAPS, CIBERSAM, Barcelona, Catalonia, Spain
| | - Susanne Bengesser
- Special Outpatient Center for Bipolar Affective Disorder, Medical University of Graz, Graz, Austria
| | - Wade H Berrettini
- Department of Psychiatry, University of Pennsylvania, Philadelphia, PA, USA
| | | | - Joanna M Biernacka
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA
- Department of Psychiatry and Psychology, Mayo Clinic, Rochester, MN, USA
| | - Armin Birner
- Special Outpatient Center for Bipolar Affective Disorder, Medical University of Graz, Graz, Austria
| | | | - Clara Brichant-Petitjean
- INSERM UMR-S 1144 - Université Paris Diderot. Pôle de Psychiatrie, AP-HP, Groupe Hospitalier Lariboisière-F. Widal, Paris, France
| | - Elise T Bui
- Intramural Research Program, National Institute of Mental Health, National Institutes of Health,U.S. Department of Health & Human Services, Bethesda, MD, USA
| | - William Byerley
- Department of Psychiatry, University of California at San Francisco, San Francisco, CA, USA
| | - Pablo Cervantes
- McGill University Health Centre, Mood Disorders Program, Montreal, QC, Canada
| | - Caterina Chillotti
- Unit of Clinical Pharmacology, Hospital University Agency of Cagliari, Cagliari, Italy
| | - Sven Cichon
- Institute of Human Genetics, University of Bonn, Germany
- Department of Genomics, Life & Brain Center, University of Bonn, Bonn, Germany
- Institute of Neuroscience and Medicine (INM-1), Research Centre Jülich, Germany
- Division of Medical Genetics and Department of Biomedicine, University of Basel, Switzerland
| | - Francesc Colom
- Bipolar Disorder Program, Institute of Neuroscience, Hospital Clinic, University of Barcelona, IDIBAPS, CIBERSAM, Barcelona, Catalonia, Spain
| | - William Coryell
- University of Iowa Hospitals and Clinics, Iowa City, IA, USA
| | - David W Craig
- The Translational Genomics Research Institute, Phoenix, AZ, USA
| | - Cristiana Cruceanu
- Douglas Mental Health University Institute, McGill University, Montreal, Canada
| | - Piotr M Czerski
- Psychiatric Genetic Unit, Poznan University of Medical Sciences, Poznan, Poland
| | - Tony Davis
- Discipline of Psychiatry, University of Adelaide, Adelaide, Australia
| | - Alexandre Dayer
- Department of Mental Health and Psychiatry, Mood Disorders Unit, Geneva University Hospitals, Geneva, Switzerland
| | - Franziska Degenhardt
- Institute of Human Genetics, University of Bonn, Germany
- Department of Genomics, Life & Brain Center, University of Bonn, Bonn, Germany
| | - Maria Del Zompo
- Department of Biomedical Sciences, University of Cagliari, Cagliari, Italy
| | - J Raymond DePaulo
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - Howard J Edenberg
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Bruno Étain
- INSERM U955, Psychiatrie translationnelle, Université Paris Est Créteil, Pôle de Psychiatrie et d'Addictologie, Hôpitaux Universitaires Henri Mondor, Créteil, France
| | - Peter Falkai
- Department of Psychiatry and Psychotherapy, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Tatiana Foroud
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Andreas J Forstner
- Institute of Human Genetics, University of Bonn, Germany
- Department of Genomics, Life & Brain Center, University of Bonn, Bonn, Germany
| | - Louise Frisén
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
- Child and Adolescent Psychiatry Research Center, Stockholm, Sweden
| | - Mark A Frye
- Department of Psychiatry and Psychology, Mayo Clinic, Rochester, MN, USA
| | - Janice M Fullerton
- Psychiatric Genetics, Neuroscience Research Australia, Sydney, Australia
- School of Medical Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Sébastien Gard
- Service de Psychiatrie, Hôpital Charles Perrens, Bordeaux, France
| | - Julie S Garnham
- Department of Psychiatry, Dalhousie University, Halifax, Canada
| | - Elliot S Gershon
- Department of Psychiatry and Behavioral Neuroscience, University of Chicago, Chicago, IL, USA
| | - Fernando S Goes
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - Tiffany A Greenwood
- Department of Psychiatry, University of California San Diego, San Diego, CA, USA
| | - Maria Grigoroiu-Serbanescu
- Biometric Psychiatric Genetics Research Unit, Alexandru Obregia Clinical Psychiatric Hospital, Bucharest, Romania
| | - Joanna Hauser
- Psychiatric Genetic Unit, Poznan University of Medical Sciences, Poznan, Poland
| | - Urs Heilbronner
- Institute of Psychiatric Phenomics and Genomics, Ludwig-Maximilians-University Munich, Munich, Germany
- Department of Psychiatry and Psychotherapy, University Medical Center (UMG), Georg-August University Göttingen, Göttingen, Germany
| | - Stefanie Heilmann-Heimbach
- Institute of Human Genetics, University of Bonn, Germany
- Department of Genomics, Life & Brain Center, University of Bonn, Bonn, Germany
| | - Stefan Herms
- Institute of Human Genetics, University of Bonn, Germany
- Department of Genomics, Life & Brain Center, University of Bonn, Bonn, Germany
- Division of Medical Genetics and Department of Biomedicine, University of Basel, Switzerland
| | - Maria Hipolito
- Department of Psychiatry and Behavioral Sciences, Howard University Hospital, Washington, DC, USA
| | | | - Per Hoffmann
- Institute of Human Genetics, University of Bonn, Germany
- Department of Genomics, Life & Brain Center, University of Bonn, Bonn, Germany
- Institute of Neuroscience and Medicine (INM-1), Research Centre Jülich, Germany
- Division of Medical Genetics and Department of Biomedicine, University of Basel, Switzerland
| | - Andrea Hofmann
- Institute of Human Genetics, University of Bonn, Germany
- Department of Genomics, Life & Brain Center, University of Bonn, Bonn, Germany
| | - Stephane Jamain
- INSERM U955, Psychiatrie translationnelle, Université Paris Est Créteil, Pôle de Psychiatrie et d'Addictologie, Hôpitaux Universitaires Henri Mondor, Créteil, France
| | - Esther Jiménez
- Bipolar Disorder Program, Institute of Neuroscience, Hospital Clinic, University of Barcelona, IDIBAPS, CIBERSAM, Barcelona, Catalonia, Spain
| | - Jean-Pierre Kahn
- Service de Psychiatrie et Psychologie Clinique, Centre Psychothérapique de Nancy - Université de Lorraine, Nancy, France
| | - Layla Kassem
- Intramural Research Program, National Institute of Mental Health, National Institutes of Health,U.S. Department of Health & Human Services, Bethesda, MD, USA
| | - John R Kelsoe
- Department of Psychiatry, University of California San Diego, San Diego, CA, USA
| | - Sarah Kittel-Schneider
- Department of Psychiatry, Psychosomatic Medicine and Psychotherapy, University Hospital Frankfurt, Frankfurt, Germany
| | - Sebastian Kliwicki
- Department of Adult Psychiatry, Poznan University of Medical Sciences, Poznan, Poland
| | - Daniel L Koller
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Barbara König
- Department of Psychiatry and Psychotherapeuthic Medicine, Landesklinikum Neunkirchen, Neunkirchen, Austria
| | - Nina Lackner
- Special Outpatient Center for Bipolar Affective Disorder, Medical University of Graz, Graz, Austria
| | - Gonzalo Laje
- Intramural Research Program, National Institute of Mental Health, National Institutes of Health,U.S. Department of Health & Human Services, Bethesda, MD, USA
| | - Maren Lang
- Department of Genetic Epidemiology in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Catharina Lavebratt
- Department of Molecular Medicine and Surgery, Karolinska Institutet and Center for Molecular Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - William B Lawson
- Department of Psychiatry and Behavioral Sciences, Howard University Hospital, Washington, DC, USA
| | - Marion Leboyer
- INSERM U955, Psychiatrie translationnelle, Université Paris Est Créteil, Pôle de Psychiatrie et d'Addictologie, Hôpitaux Universitaires Henri Mondor, Créteil, France
| | - Susan G Leckband
- Department of Pharmacy, VA San Diego Healthcare System, San Diego, CA, USA
| | - Chunyu Liu
- Department of Psychiatry, University of Illinois at Chicago, Chicago, IL, USA
| | - Anna Maaser
- Institute of Human Genetics, University of Bonn, Germany
- Department of Genomics, Life & Brain Center, University of Bonn, Bonn, Germany
| | - Pamela B Mahon
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins School of Medicine, Baltimore, MD, USA
| | | | - Mario Maj
- Department of Psychiatry, University of Naples SUN, Naples, Italy
| | - Mirko Manchia
- Department of Biomedical Sciences, University of Cagliari, Cagliari, Italy
- Department of Pharmacology, Dalhousie University, Halifax, NS, Canada
| | - Lina Martinsson
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Michael J McCarthy
- Department of Psychiatry, VA San Diego Healthcare System, San Diego, CA, USA
| | - Susan L McElroy
- Lindner Center of HOPE, University of Cincinnati College of Medicine, Mason, OH, USA
| | - Melvin G McInnis
- Department of Psychiatry, University of Michigan, Ann Arbor, MI, USA
| | - Rebecca McKinney
- Department of Psychiatry, University of California San Diego, San Diego, CA, USA
| | - Philip B Mitchell
- School of Psychiatry, University of New South Wales, and Black Dog Institute, Sydney, Australia
| | - Marina Mitjans
- Department of Biologia Animal, Unitat d'Antropologia (Dp. Biología Animal), Facultat de Biologia and Institut de Biomedicina (IBUB), Universitat de Barcelona, CIBERSAM, Barcelona, Spain
| | - Francis M Mondimore
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - Palmiero Monteleone
- Department of Psychiatry, University of Naples SUN, Naples, Italy
- Neurosciences Section, Department of Medicine and Surgery, University of Salerno, Salerno, Italy
| | - Thomas W Mühleisen
- Institute of Human Genetics, University of Bonn, Germany
- Department of Genomics, Life & Brain Center, University of Bonn, Bonn, Germany
- Institute of Neuroscience and Medicine (INM-1), Research Centre Jülich, Germany
| | | | - Markus M Nöthen
- Institute of Human Genetics, University of Bonn, Germany
- Department of Genomics, Life & Brain Center, University of Bonn, Bonn, Germany
| | - Tomas Novák
- National Institute of Mental Health, Klecany, Czech Republic
| | - John I Nurnberger
- Department of Psychiatry, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Evaristus A Nwulia
- Department of Psychiatry and Behavioral Sciences, Howard University Hospital, Washington, DC, USA
| | - Urban Ösby
- Department of Neurobiology, Care Sciences, and Society, Karolinska Institutet and Center for Molecular Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Andrea Pfennig
- Department of Psychiatry and Psychotherapy, University Hospital Carl Gustav Carus, Technische Universität, Dresden, Germany
| | - James B Potash
- Department of Psychiatry, Carver College of Medicine, University of Iowa School of Medicine, Iowa City, IA, USA
| | - Peter Propping
- Institute of Human Genetics, University of Bonn, Germany
| | - Andreas Reif
- Department of Psychiatry, Psychosomatic Medicine and Psychotherapy, University Hospital Frankfurt, Frankfurt, Germany
| | - Eva Reininghaus
- Special Outpatient Center for Bipolar Affective Disorder, Medical University of Graz, Graz, Austria
| | - John Rice
- Department of Psychiatry, Washington University School of Medicine in St. Louis
| | - Marcella Rietschel
- Department of Genetic Epidemiology in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Guy A Rouleau
- Montreal Neurological Institute and Hospital, McGill University, Montreal, Canada
| | - Janusz K Rybakowski
- Department of Adult Psychiatry, Poznan University of Medical Sciences, Poznan, Poland
| | - Martin Schalling
- Department of Molecular Medicine and Surgery, Karolinska Institutet and Center for Molecular Medicine, Karolinska University Hospital, Stockholm, Sweden
| | | | - Peter R Schofield
- School of Medical Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
- Mental Illness, Neuroscience Research Australia, Sydney, Australia
| | | | - Thomas G Schulze
- Intramural Research Program, National Institute of Mental Health, National Institutes of Health,U.S. Department of Health & Human Services, Bethesda, MD, USA
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins School of Medicine, Baltimore, MD, USA
- Institute of Psychiatric Phenomics and Genomics, Ludwig-Maximilians-University Munich, Munich, Germany
- Department of Psychiatry and Psychotherapy, University Medical Center (UMG), Georg-August University Göttingen, Göttingen, Germany
- Department of Genetic Epidemiology in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Johannes Schumacher
- Institute of Human Genetics, University of Bonn, Germany
- Department of Genomics, Life & Brain Center, University of Bonn, Bonn, Germany
| | - Barbara W Schweizer
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - Giovanni Severino
- Department of Biomedical Sciences, University of Cagliari, Cagliari, Italy
| | - Tatyana Shekhtman
- Department of Psychiatry, University of California San Diego, San Diego, CA, USA
| | - Paul D Shilling
- Department of Psychiatry, University of California San Diego, San Diego, CA, USA
| | | | - Claire M Slaney
- Department of Psychiatry, Dalhousie University, Halifax, Canada
| | - Erin N Smith
- Scripps Translational Science Institute, La Jolla, CA, USA
| | - Alessio Squassina
- Department of Biomedical Sciences, University of Cagliari, Cagliari, Italy
| | - Thomas Stamm
- Department of Psychiatry and Psychotherapy, Charité - Universitätsmedizin Berlin, Campus Charité Mitte, Berlin, Germany
| | - Pavla Stopkova
- National Institute of Mental Health, Klecany, Czech Republic
| | - Fabian Streit
- Department of Genetic Epidemiology in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Jana Strohmaier
- Department of Genetic Epidemiology in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | | | - Sarah K Tighe
- Department of Psychiatry, Carver College of Medicine, University of Iowa School of Medicine, Iowa City, IA, USA
| | | | - Gustavo Turecki
- Douglas Mental Health University Institute, McGill University, Montreal, Canada
| | - Eduard Vieta
- Bipolar Disorder Program, Institute of Neuroscience, Hospital Clinic, University of Barcelona, IDIBAPS, CIBERSAM, Barcelona, Catalonia, Spain
| | - Julia Volkert
- Department of Psychiatry, Psychosomatic Medicine and Psychotherapy, University Hospital Frankfurt, Frankfurt, Germany
| | - Stephanie H Witt
- Department of Genetic Epidemiology in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Adam Wright
- School of Psychiatry, University of New South Wales, and Black Dog Institute, Sydney, Australia
| | - Peter P Zandi
- Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Peng Zhang
- Department of Psychiatry, University of Michigan, Ann Arbor, MI, USA
| | - Sebastian Zollner
- Department of Psychiatry, University of Michigan, Ann Arbor, MI, USA
| | - Francis J McMahon
- Intramural Research Program, National Institute of Mental Health, National Institutes of Health,U.S. Department of Health & Human Services, Bethesda, MD, USA,
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19
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Effects of neuregulin-1 administration on neurogenesis in the adult mouse hippocampus, and characterization of immature neurons along the septotemporal axis. Sci Rep 2016; 6:30467. [PMID: 27469430 PMCID: PMC4965755 DOI: 10.1038/srep30467] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2016] [Accepted: 07/04/2016] [Indexed: 12/11/2022] Open
Abstract
Adult hippocampal neurogenesis is associated with learning and affective behavioural regulation. Its diverse functionality is segregated along the septotemporal axis from the dorsal to ventral hippocampus. However, features distinguishing immature neurons in these regions have yet to be characterized. Additionally, although we have shown that administration of the neurotrophic factor neuregulin-1 (NRG1) selectively increases proliferation and overall neurogenesis in the mouse ventral dentate gyrus (DG), likely through ErbB3, NRG1's effects on intermediate neurogenic stages in immature neurons are unknown. We examined whether NRG1 administration increases DG ErbB3 phosphorylation. We labeled adultborn cells using BrdU, then administered NRG1 to examine in vivo neurogenic effects on immature neurons with respect to cell survival, morphology, and synaptogenesis. We also characterized features of immature neurons along the septotemporal axis. We found that neurogenic effects of NRG1 are temporally and subregionally specific to proliferation in the ventral DG. Particular morphological features differentiate immature neurons in the dorsal and ventral DG, and cytogenesis differed between these regions. Finally, we identified synaptic heterogeneity surrounding the granule cell layer. These results indicate neurogenic involvement of NRG1-induced antidepressant-like behaviour is particularly associated with increased ventral DG cell proliferation, and identify novel distinctions between dorsal and ventral hippocampal neurogenic development.
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20
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Sarıçiçek A, Zorlu N, Yalın N, Hıdıroğlu C, Çavuşoğlu B, Ceylan D, Ada E, Tunca Z, Özerdem A. Abnormal white matter integrity as a structural endophenotype for bipolar disorder. Psychol Med 2016; 46:1547-1558. [PMID: 26947335 DOI: 10.1017/s0033291716000180] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND Several lines of evidence suggest that bipolar disorder (BD) is associated with white matter (WM) pathology. Investigation of unaffected first-degree relatives of BD patients may help to distinguish structural biomarkers of genetic risk without the confounding effects of burden of illness, medication or clinical state. In the present study, we applied tract-based spatial statistics to study WM changes in patients with BD, unaffected siblings and controls. METHOD A total of 27 euthymic patients with BD type I, 20 unaffected siblings of bipolar patients and 29 healthy controls who did not have any current or past diagnosis of Axis I psychiatric disorders were enrolled in the study. RESULTS Fractional anisotropy (FA) was significantly lower in BD patients than in the control group in the corpus callosum, fornix, bilateral superior longitudinal fasciculus, inferior longitudinal fasciculus, inferior fronto-occipital fasciculus, anterior thalamic radiation, posterior thalamic radiation, cingulum, uncinate fasciculus, superior corona radiata, anterior corona radiata and left external capsule. In region-of-interest (ROI) analyses, we found that both unaffected siblings and bipolar patients had significantly reduced FA in the left posterior thalamic radiation, the left sagittal stratum, and the fornix compared with healthy controls. Average FA for unaffected siblings was intermediate between the healthy controls and bipolar patients within these ROIs. CONCLUSIONS Decreased FA in the fornix, left posterior thalamic radiation and left sagittal stratum in both bipolar patients and unaffected siblings may represent a potential structural endophenotype or a trait-based marker for BD.
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Affiliation(s)
- A Sarıçiçek
- Department of Psychiatry,Faculty of Medicine,Izmir Katip Celebi University,Ataturk Training and Research Hospital,Izmir,Turkey
| | - N Zorlu
- Department of Psychiatry,Faculty of Medicine,Izmir Katip Celebi University,Ataturk Training and Research Hospital,Izmir,Turkey
| | - N Yalın
- Department of Neuroscience,Health Sciences Institute,Dokuz Eylul University,Izmir,Turkey
| | - C Hıdıroğlu
- Department of Neuroscience,Health Sciences Institute,Dokuz Eylul University,Izmir,Turkey
| | - B Çavuşoğlu
- Department of Neuroscience,Health Sciences Institute,Dokuz Eylul University,Izmir,Turkey
| | - D Ceylan
- Department of Neuroscience,Health Sciences Institute,Dokuz Eylul University,Izmir,Turkey
| | - E Ada
- Department of Radiology,Faculty of Medicine,Dokuz Eylul University,Izmir,Turkey
| | - Z Tunca
- Department of Neuroscience,Health Sciences Institute,Dokuz Eylul University,Izmir,Turkey
| | - A Özerdem
- Department of Neuroscience,Health Sciences Institute,Dokuz Eylul University,Izmir,Turkey
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21
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Gao J, Jia M, Qiao D, Qiu H, Sokolove J, Zhang J, Pan Z. TPH2 gene polymorphisms and bipolar disorder: A meta-analysis. Am J Med Genet B Neuropsychiatr Genet 2016; 171B:145-52. [PMID: 26365518 DOI: 10.1002/ajmg.b.32381] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Accepted: 08/31/2015] [Indexed: 11/07/2022]
Abstract
BACKGROUND Disturbance of the serotonergic system contributes to the etiology of bipolar disorder (BD). Tryptophan hydroxylase-2 (TPH2) is an important rate-limiting enzyme in the synthetic pathway for brain serotonin and has been suggested to play a role in BD. MATERIALS AND METHODS We performed a systematic review and meta-analysis of all studies to date investigating the association studies between TPH2 and BD published before Aug 2014. All studies were abstracted from PubMed, Embase, HuGNet, and China National Knowledge Infrastructure (CNKI). Manuscripts and the supplementary documents of published genome-wide association studies in the field were also included. Effect sizes of independent loci that have been studied in more than three articles were synthesized using fixed and random effects models. RESULTS Eight eligible studies addressed association between 63 TPH2 gene single nucleotide polymorphisms (SNPs) with BD, after linkage disequilibrium analysis, 12 independent SNPs were identified. Finally, three SNPs (rs4760820, rs11178998, and rs7954758) were found associated with BD using fixed effects models, and rs4760820 and rs11178998 were still associated with BD even with the more conservative random effects models. CONCLUSIONS rs4760820 and rs11178998 were identified to have strong genetic association with BD in present study though confirmation will require larger sample sizes and in additional populations.
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Affiliation(s)
- Jin Gao
- Department of Clinical Psychology, Qilu Hospital of Shandong University, QingDao, Shandong, China
| | - Mingrui Jia
- Department of Pain, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, China
| | - Dongdong Qiao
- Department of psychology, Shandong Mental Health Center, Jinan, Shandong, China
| | - Huimin Qiu
- Department of psychology, Shandong Mental Health Center, Jinan, Shandong, China
| | - Jeremy Sokolove
- Division of Immunology and Rheumatology, Stanford University Medial Center, and VA Palo Alto Health Care System, Palo Alto, California
| | - Jingxuan Zhang
- Department of psychology, Shandong Mental Health Center, Jinan, Shandong, China
| | - Zhenglun Pan
- Department of Rheumatology, Qilu Hospital of Shandong University, QingDao, Shandong, China
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22
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Schwarz E, Tost H, Meyer-Lindenberg A. Working memory genetics in schizophrenia and related disorders: An RDoC perspective. Am J Med Genet B Neuropsychiatr Genet 2016; 171B:121-31. [PMID: 26365198 DOI: 10.1002/ajmg.b.32353] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Accepted: 07/08/2015] [Indexed: 12/29/2022]
Abstract
Improved classification of mental disorders through neurobiological measures will require a set of traits that map to transdiagnostic subgroups of patients and align with heritable, core psychopathological processes at the center of the disorders of interest. A promising candidate is working memory (WM) function, for which deficits have been reported across multiple diagnostic entities including schizophrenia, bipolar disorder, ADHD, autism, and major depressive disorder. Here we review genetic working memory associations and their brain functional correlates from the perspective of identifying patient subgroups across conventional diagnostic boundaries, explore the utility of multimodal investigations integrating functional information at the neural systems level and explore potential limitations as well as future directions for research.
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Affiliation(s)
- Emanuel Schwarz
- Department of Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Heike Tost
- Department of Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Andreas Meyer-Lindenberg
- Department of Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
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23
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Rolstad S, Pålsson E, Ekman CJ, Eriksson E, Sellgren C, Landén M. Polymorphisms of dopamine pathway genes NRG1 and LMX1A are associated with cognitive performance in bipolar disorder. Bipolar Disord 2015; 17:859-68. [PMID: 26534905 DOI: 10.1111/bdi.12347] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 09/19/2015] [Indexed: 01/11/2023]
Abstract
OBJECTIVES LIM homeobox transcription factor 1, alpha (LMX1A) and neuregulin 1 (NRG1) are susceptibility genes for schizophrenia that have been implicated in the dopaminergic pathway and have been associated with altered cognitive functioning. We hypothesized that single nucleotide polymorphisms (SNPs) in LMX1A and NRG1 would be associated with cognitive functioning in bipolar disorder. METHODS In total, four SNPs were directly genotyped. Regression models with five aggregated cognitive domains and intelligence quotient (IQ) score were run using risk variants of LMX1A (rs11809911, rs4657412, rs6668493) and NRG1 (rs35753505) as predictors. Models were performed in a clinical sample of patients with bipolar disorder (n = 114) and healthy controls (n = 104). RESULTS The risk variants of the rs11809911 SNP in LMX1A were negatively associated with IQ score and memory/learning, whereas the risk variants of rs35753505 in NRG1 were positively associated with IQ score (adjusted R(2) = 0.17, Q = 0.006) and memory/learning (adjusted R(2) = 0.24, Q = 0.001). The risk variants of the rs35753505 SNP in NRG1 were positively associated with language (adjusted R(2) = 0.11, Q = 0.006), visuospatial functions (adjusted R(2) = 0.23, Q = 0.001), and attention/speed (adjusted R(2) = 0.25, Q = 0.001). Results could not be replicated in controls. CONCLUSIONS The risk variants of the rs35753505 SNP were associated with increased performance in several cognitive domains and IQ, whereas the risk variants of the rs11809911 SNP in LMX1A was associated with reduced IQ and memory/learning.
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Affiliation(s)
- Sindre Rolstad
- Institute of Neuroscience and Physiology, Sahlgrenska Academy, Gothenburg University, Gothenburg, Sweden
| | - Erik Pålsson
- Institute of Neuroscience and Physiology, Sahlgrenska Academy, Gothenburg University, Gothenburg, Sweden
| | - Carl Johan Ekman
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Elias Eriksson
- Institute of Neuroscience and Physiology, Sahlgrenska Academy, Gothenburg University, Gothenburg, Sweden
| | - Carl Sellgren
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Mikael Landén
- Institute of Neuroscience and Physiology, Sahlgrenska Academy, Gothenburg University, Gothenburg, Sweden.,Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.,Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
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24
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Wang R, Wang Y, Hu R, Chen X, Song M, Wang X. Decreased plasma levels of neureglin-1 in drug naïve patients and chronic patients with schizophrenia. Neurosci Lett 2015; 606:220-4. [PMID: 26365407 DOI: 10.1016/j.neulet.2015.09.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2015] [Revised: 08/25/2015] [Accepted: 09/08/2015] [Indexed: 10/23/2022]
Abstract
Although the neuregulin-1 (NRG1) gene is one of the susceptibility genes for schizophrenia and various other psychiatric diseases, it remains unclear how individual psychiatric diseases affect the expression of the NRG1 protein in patients. A previous study reported a schizophrenia-linked decrease in serum NRG1 levels. The present study aimed to replicate this initial finding and to assess its disease specificity for schizophrenia. We collected plasma samples from drug-naïve patients with first-episode schizophrenia (n=80), patients with chronic schizophrenia (n=86), patients with bipolar I disorder (n=60), patients with bipolar II disorder (n=60) and patients with major depressive disorder (n=60), we measured the plasma levels of NRG1β1 and compared the levels with those of age- and sex-matched healthy volunteers (n=82). One-way ANOVA and post hoc analyses detected specific NRG1β1 decreases in the participants with first-episode and chronic schizophrenia but not in those with bipolar I disorder, bipolar II disorder or major depressive disorder. The mean plasma levels of NRG1β1 immunoreactivity were 4.27±0.71 ng/mL in the participants with first-episode schizophrenia, 4.08±0.64 ng/mL in the participants with chronic schizophrenia and 7.21±0.91 ng/mL in the healthy controls. Although we analyzed the pathological correlations of NRG1β1 immunoreactivity in terms of the clinical parameters of the sample, we observed only weak positive correlations with the age of the participants with chronic schizophrenia and the disease onset times of the participants with bipolar II disorder. We failed to identify correlations between other clinical parameters and plasma NRG1β1 immunoreactivity among all patient subjects. These findings suggest that NRG1 may serve as a relatively specific disease marker for schizophrenia. However, the pathological role of this decrease must be explored further.
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Affiliation(s)
- Ran Wang
- Department of Psychiatry, First Hospital of Hebei Medical University, 89 Donggang Lu, Shijiazhuang, Hebei 050031, China; Institute of Mental Health of Hebei Medical University, China
| | - Yumei Wang
- Department of Psychiatry, First Hospital of Hebei Medical University, 89 Donggang Lu, Shijiazhuang, Hebei 050031, China; Institute of Mental Health of Hebei Medical University, China
| | - Rui Hu
- Department of Psychiatry, First Hospital of Hebei Medical University, 89 Donggang Lu, Shijiazhuang, Hebei 050031, China; Institute of Mental Health of Hebei Medical University, China
| | - Xingshi Chen
- Shanghai Mental Health Center, Shanghai Jiaotong University School of Medicine, Shanghai 200030, China
| | - Mei Song
- Department of Psychiatry, First Hospital of Hebei Medical University, 89 Donggang Lu, Shijiazhuang, Hebei 050031, China; Institute of Mental Health of Hebei Medical University, China
| | - Xueyi Wang
- Department of Psychiatry, First Hospital of Hebei Medical University, 89 Donggang Lu, Shijiazhuang, Hebei 050031, China; Institute of Mental Health of Hebei Medical University, China.
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25
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Luo XJ, Huang L, van den Oord EJ, Aberg KA, Gan L, Zhao Z, Yao YG. Common variants in the MKL1 gene confer risk of schizophrenia. Schizophr Bull 2015; 41:715-27. [PMID: 25380769 PMCID: PMC4393692 DOI: 10.1093/schbul/sbu156] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Genome-wide association studies (GWAS) of schizophrenia have identified multiple risk variants with robust association signals for schizophrenia. However, these variants could explain only a small proportion of schizophrenia heritability. Furthermore, the effect size of these risk variants is relatively small (eg, most of them had an OR less than 1.2), suggesting that additional risk variants may be detected when increasing sample size in analysis. Here, we report the identification of a genome-wide significant schizophrenia risk locus at 22q13.1 by combining 2 large-scale schizophrenia cohort studies. Our meta-analysis revealed that 7 single nucleotide polymorphism (SNPs) on chromosome 22q13.1 reached the genome-wide significance level (P < 5.0×10(-8)) in the combined samples (a total of 38441 individuals). Among them, SNP rs6001946 had the most significant association with schizophrenia (P = 2.04×10(-8)). Interestingly, all 7 SNPs are in high linkage disequilibrium and located in the MKL1 gene. Expression analysis showed that MKL1 is highly expressed in human and mouse brains. We further investigated functional links between MKL1 and proteins encoded by other schizophrenia susceptibility genes in the whole human protein interaction network. We found that MKL1 physically interacts with GSK3B, a protein encoded by a well-characterized schizophrenia susceptibility gene. Collectively, our results revealed that genetic variants in MKL1 might confer risk to schizophrenia. Further investigation of the roles of MKL1 in the pathogenesis of schizophrenia is warranted.
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Affiliation(s)
- Xiong-jian Luo
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Kunming, Yunnan, China;,*To whom correspondence should be addressed; Key Laboratory of Animal Models and Human Disease Mechanisms, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650223, China; tel: 86-871-65180085, fax: 86-871-65180085, e-mail:
| | - Liang Huang
- First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi 341000, China
| | - Edwin J. van den Oord
- Center for Biomarker Research and Personalized Medicine, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Karolina A. Aberg
- Center for Biomarker Research and Personalized Medicine, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Lin Gan
- Flaum Eye Institute and Department of Ophthalmology, University of Rochester, Rochester, NY 14642, USA
| | - Zhongming Zhao
- Departments of Biomedical Informatics and Psychiatry, Vanderbilt University School of Medicine, Nashville, TN
| | - Yong-Gang Yao
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Kunming, Yunnan, China
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26
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Suárez-Pinilla P, Roíz-Santiañez R, Mata I, Ortiz-García de la Foz V, Brambilla P, Fañanas L, Valle-San Román N, Crespo-Facorro B. Progressive Structural Brain Changes and NRG1 Gene Variants in First-Episode Nonaffective Psychosis. Neuropsychobiology 2015; 71:103-111. [PMID: 25871612 DOI: 10.1159/000370075] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Accepted: 11/11/2014] [Indexed: 11/19/2022]
Abstract
BACKGROUND Structural brain abnormalities are already present during the early phases of psychosis, but factors underlying brain volume changes are still not well understood. The neuregulin 1 gene (NRG1), influencing neurodevelopment and neuroplasticity, has been associated with schizophrenia. Our aim was to examine whether variations in the NRG1 gene (SNP8NRG221132, SNP8NRG6221533 and SNP8NRG243177 polymorphisms) influence longitudinal changes in the brain during a first episode of psychosis (FEP). METHODS A 3-year follow-up magnetic resonance imaging (MRI) study was performed. Fifty-nine minimally medicated patients who were experiencing FEP and 14 healthy control individuals underwent genotyping and structural brain MRI at baseline and at 1- and 3-year follow-up. A comparison of brain volumes, gray matter, white matter (WM), lateral ventricles (LV), cortical cerebrospinal fluid, and thalamus and caudate was made between the groups according to their genotype. RESULTS In patients, the SNP8NRG6221533 risk C allele was significantly associated with increased LV volume across time. C allele carriers had significantly less WM compared with subjects homozygous for the T allele after the follow-up. No other significant differences were observed among subgroups. No significant changes according to the genotypes were found in healthy individuals. CONCLUSION Our findings suggest that variations of neurodevelopment-related genes, such as the NRG1 gene, can contribute to brain abnormalities described in early phases of schizophrenia and progressive changes during the initial years of the illness. To our knowledge, it is the first time that a relation between NRG1 polymorphisms and longitudinal brain changes is reported. © 2015 S. Karger AG, Basel.
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Affiliation(s)
- Paula Suárez-Pinilla
- Department of Psychiatry, University Hospital Marqués de Valdecilla, School of Medicine, University of Cantabria, Santander, Spain
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27
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Biernacka JM, Sangkuhl K, Jenkins G, Whaley RM, Barman P, Batzler A, Altman RB, Arolt V, Brockmöller J, Chen CH, Domschke K, Hall-Flavin DK, Hong CJ, Illi A, Ji Y, Kampman O, Kinoshita T, Leinonen E, Liou YJ, Mushiroda T, Nonen S, Skime MK, Wang L, Baune BT, Kato M, Liu YL, Praphanphoj V, Stingl JC, Tsai SJ, Kubo M, Klein TE, Weinshilboum R. The International SSRI Pharmacogenomics Consortium (ISPC): a genome-wide association study of antidepressant treatment response. Transl Psychiatry 2015; 5:e553. [PMID: 25897834 PMCID: PMC4462610 DOI: 10.1038/tp.2015.47] [Citation(s) in RCA: 84] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Accepted: 03/01/2015] [Indexed: 12/21/2022] Open
Abstract
Response to treatment with selective serotonin reuptake inhibitors (SSRIs) varies considerably between patients. The International SSRI Pharmacogenomics Consortium (ISPC) was formed with the primary goal of identifying genetic variation that may contribute to response to SSRI treatment of major depressive disorder. A genome-wide association study of 4-week treatment outcomes, measured using the 17-item Hamilton Rating Scale for Depression (HRSD-17), was performed using data from 865 subjects from seven sites. The primary outcomes were percent change in HRSD-17 score and response, defined as at least 50% reduction in HRSD-17. Data from two prior studies, the Pharmacogenomics Research Network Antidepressant Medication Pharmacogenomics Study (PGRN-AMPS) and the Sequenced Treatment Alternatives to Relieve Depression (STAR*D) study, were used for replication, and a meta-analysis of the three studies was performed (N=2394). Although many top association signals in the ISPC analysis map to interesting candidate genes, none were significant at the genome-wide level and the associations were not replicated using PGRN-AMPS and STAR*D data. The top association result in the meta-analysis of response represents SNPs 5′ upstream of the neuregulin-1 gene, NRG1 (P = 1.20E - 06). NRG1 is involved in many aspects of brain development, including neuronal maturation and variations in this gene have been shown to be associated with increased risk for mental disorders, particularly schizophrenia. Replication and functional studies of these findings are warranted.
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Affiliation(s)
- J M Biernacka
- Department of Psychiatry and Psychology, Mayo Clinic, Rochester, MN, USA,Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA,Department of Psychiatry and Psychology, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA. E-mail:
| | - K Sangkuhl
- Department of Genetics, Stanford University, Stanford, CA, USA
| | - G Jenkins
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA
| | - R M Whaley
- Department of Genetics, Stanford University, Stanford, CA, USA
| | - P Barman
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA
| | - A Batzler
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA
| | - R B Altman
- Department of Genetics, Stanford University, Stanford, CA, USA,Department of Bioengineering, Stanford University, Stanford, CA, USA
| | - V Arolt
- Department of Psychiatry and Psychotherapy, University of Muenster, Muenster, Germany
| | - J Brockmöller
- Department of Clinical Pharmacology, University Göttingen, Göttingen, Germany
| | - C H Chen
- Department of Psychiatry, Taipei Medical University-Shuangho Hospital, New Taipei City, Taiwan
| | - K Domschke
- Department of Psychiatry, Psychosomatics and Psychotherapy, University of Wuerzburg, Wuerzburg, Germany
| | - D K Hall-Flavin
- Department of Psychiatry and Psychology, Mayo Clinic, Rochester, MN, USA
| | - C J Hong
- Department of Psychiatry, Taipei Veterans General Hospital, Taipei, Taiwan,Division of Psychiatry, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - A Illi
- Department of Psychiatry, School of Medicine, University of Tampere, Tampere, Finland
| | - Y Ji
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, Rochester, MN, USA
| | - O Kampman
- Department of Psychiatry, School of Medicine, University of Tampere, Tampere, Finland,Department of Psychiatry, Seinäjoki Hospital District, Seinäjoki, Finland
| | - T Kinoshita
- Department of Neuropsychiatry, Kansai Medical University, Osaka, Japan
| | - E Leinonen
- Department of Psychiatry, School of Medicine, University of Tampere, Tampere, Finland,Department of Psychiatry, Tampere University Hospital, Tampere, Finland
| | - Y J Liou
- Department of Psychiatry, Taipei Veterans General Hospital, Taipei, Taiwan,Division of Psychiatry, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - T Mushiroda
- RIKEN Center for Integrative Medical Sciences, Kanagawa, Japan
| | - S Nonen
- Department of Pharmacy, Hyogo University of Health Sciences, Hyogo, Japan
| | - M K Skime
- Department of Psychiatry and Psychology, Mayo Clinic, Rochester, MN, USA
| | - L Wang
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, Rochester, MN, USA
| | - B T Baune
- Department of Psychiatry, University of Adelaide, Adelaide, SA, Australia
| | - M Kato
- Department of Neuropsychiatry, Kansai Medical University, Osaka, Japan
| | - Y L Liu
- Center for Neuropsychiatric Research, National Health Research Institutes, Miaoli, Taiwan
| | - V Praphanphoj
- Center for Medical Genetics Research, Rajanukul Institute, Department of Mental Health, Ministry of Public Health Bangkok, Bangkok, Thailand
| | - J C Stingl
- Research Division Federal Institute for Drugs and Medical Devices, Bonn, Germany
| | - S J Tsai
- Department of Psychiatry, Taipei Veterans General Hospital, Taipei, Taiwan,Division of Psychiatry, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - M Kubo
- RIKEN Center for Integrative Medical Sciences, Kanagawa, Japan
| | - T E Klein
- Department of Genetics, Stanford University, Stanford, CA, USA
| | - R Weinshilboum
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, Rochester, MN, USA
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Katsounas A, Rasimas JJ, Schlaak JF, Lempicki RA, Rosenstein DL, Kottilil S. Interferon stimulated exonuclease gene 20 kDa links psychiatric events to distinct hepatitis C virus responses in human immunodeficiency virus positive patients. J Med Virol 2014; 86:1323-31. [PMID: 24782267 PMCID: PMC4114765 DOI: 10.1002/jmv.23956] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/18/2014] [Indexed: 01/02/2023]
Abstract
Hepatitis C Virus (HCV) infection occurs frequently in patients with preexisting mental illness. Treatment for chronic hepatitis C using interferon formulations often increases risk for neuro-psychiatric symptoms. Pegylated-Interferon-α (PegIFN-α) remains crucial for attaining sustained virologic response (SVR); however, PegIFN-α based treatment is associated with psychiatric adverse effects, which require dose reduction and/or interruption. This study's main objective was to identify genes induced by PegIFN-α and expressed in the central nervous system and immune system, which could mediate the development of psychiatric toxicity in association with antiviral outcome. Using peripheral blood mononuclear cells from Human Immunodeficiency Virus (HIV)/HCV co-infected donors (N = 28), DNA microarray analysis was performed and 21 differentially regulated genes were identified in patients with psychiatric toxicity versus those without. Using these 21 expression profiles a two-way-ANOVA was performed to select genes based on antiviral outcome and occurrence of neuro-psychiatric adverse events. Microarray analysis demonstrated that Interferon-stimulated-exonuclease-gene 20 kDa (ISG20) and Interferon-alpha-inducible-protein 27 (IFI27) were the most regulated genes (P < 0.05) between three groups that were built by combining antiviral outcome and neuro-psychiatric toxicity. Validation by bDNA assay confirmed that ISG20 expression levels were significantly associated with these outcomes (P < 0.035). Baseline levels and induction of ISG20 correlated independently with no occurrence of psychiatric adverse events and non-response to therapy (P < 0.001). Among the 21 genes that were associated with psychiatric adverse events and 20 Interferon-inducible genes (IFIGs) used as controls, only ISG20 expression was able to link PegIFN-α related neuro-psychiatric toxicity to distinct HCV-responses in patients co-infected with HIV and HCV in vivo.
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Affiliation(s)
- Antonios Katsounas
- Department of Gastroenterology and Hepatology, University Hospital Essen, Hufelandstrasse 55, 45147 Essen, Germany
| | - Joseph J. Rasimas
- Experimental Therapeutics and Pathophysiology Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, MD 20892, USA
| | - Joerg F. Schlaak
- Department of Gastroenterology and Hepatology, University Hospital Essen, Hufelandstrasse 55, 45147 Essen, Germany
| | - Richard A. Lempicki
- Laboratory of Immunopathogenesis and Bioinformatics, SAIC-Frederick, Inc, National Cancer Institute at Frederick, Frederick, MD 21702, USA
| | - Donald L. Rosenstein
- Department of Psychiatry, University of North Carolina at Chapel Hill, NC 27599-7305, USA
| | - Shyam Kottilil
- Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
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Convergent lines of evidence support CAMKK2 as a schizophrenia susceptibility gene. Mol Psychiatry 2014; 19:774-83. [PMID: 23958956 DOI: 10.1038/mp.2013.103] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2013] [Revised: 07/15/2013] [Accepted: 07/18/2013] [Indexed: 01/22/2023]
Abstract
Genes that are differentially expressed between schizophrenia patients and healthy controls may have key roles in the pathogenesis of schizophrenia. We analyzed two large-scale genome-wide expression studies, which examined changes in gene expression in schizophrenia patients and their matched controls. We found calcium/calmodulin (CAM)-dependent protein kinase kinase 2 (CAMKK2) is significantly downregulated in individuals with schizophrenia in both studies. To seek the potential genetic variants that may regulate the expression of CAMKK2, we investigated the association between single-nucleotide polymorphisms (SNPs) within CAMKK2 and the expression level of CAMKK2. We found one SNP, rs1063843, which is located in intron 17 of CAMKK2, is strongly associated with the expression level of CAMKK2 in human brains (P=1.1 × 10(-6)) and lymphoblastoid cell lines (the lowest P=8.4 × 10(-6)). We further investigated the association between rs1063843 and schizophrenia in multiple independent populations (a total of 130 623 subjects) and found rs1063843 is significantly associated with schizophrenia (P=5.17 × 10(-5)). Interestingly, we found the T allele of rs1063843, which is associated with lower expression level of CAMKK2, has a higher frequency in individuals with schizophrenia in all of the tested samples, suggesting rs1063843 may be a causal variant. We also found that rs1063843 is associated with cognitive function and personality in humans. In addition, protein-protein interaction (PPI) analysis revealed that CAMKK2 participates in a highly interconnected PPI network formed by top schizophrenia genes, which further supports the potential role of CAMKK2 in the pathogenesis of schizophrenia. Taken together, these converging lines of evidence strongly suggest that CAMKK2 may have pivotal roles in schizophrenia susceptibility.
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30
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Cao L, Deng W, Guan L, Yang Z, Lin Y, Ma X, Li X, Liu Y, Ye B, Lao G, Chen Y, Liang H, Wu Y, Ou Y, Huang W, Liu W, Wang Q, Wang Y, Zhao L, Li T, Hu X. Association of the 3' region of the neuregulin 1 gene with bipolar I disorder in the Chinese Han population. J Affect Disord 2014; 162:81-8. [PMID: 24767010 DOI: 10.1016/j.jad.2014.03.037] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Revised: 03/17/2014] [Accepted: 03/18/2014] [Indexed: 11/26/2022]
Abstract
BACKGROUND Based on the function of neuregulin 1 (NRG1) in neurodevelopment, susceptibility to bipolar disorder presumably involves this gene. The 3' region of NRG1 contains the majority of the coding exons, and transcripts from this region encode 8 of the 9 known NRG1 isoforms; therefore, this region is likely to be predominant versus the 5' region in terms of their relative contributions to NRG1 function. We investigated the association between the 3' region of the NRG1 gene and bipolar I disorder (BPI) in the Chinese Han population and performed further analyses depending on the presence or absence of psychotic features. METHODS A total of 385 BPI patients and 475 healthy controls were recruited for this study. Thirty tag single nucleotide polymorphisms (SNPs) across the 3' region of the NRG1 gene were genotyped for allelic and haplotypic associations with BPI and subgroups with psychotic features (BPI-P) or without psychotic features (BPI-NP). RESULTS Individual marker analysis showed that 2 SNPs (rs12547858 and rs6468121) in this region were significantly associated with BPI. Moreover, subgroup analyses showed significant but marginal associations of rs6468121 with BPI-P and rs3757933 with BPI-NP. Haplotype analyses showed that 6 haplotypes were associated with BPI only. LIMITATIONS The sample size was relatively small. The investigated tag SNPs only represented 83% of the information on the targeted region. There might be a retrospective bias in the subgroup analyses. CONCLUSION The results suggest that the 3' region of the NRG1 gene plays a role in BPI susceptibility in the Chinese Han population. In addition, the preliminary results show that BPI with psychotic features and BPI without psychotic features may constitute different sub-phenotypes; however, this finding should be confirmed in a larger population sample.
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Affiliation(s)
- Liping Cao
- Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou Brain Hospital, Guangzhou, Guangdong, PR China.
| | - Wenhao Deng
- Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou Brain Hospital, Guangzhou, Guangdong, PR China
| | - Lijie Guan
- Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou Brain Hospital, Guangzhou, Guangdong, PR China
| | - Zhenxing Yang
- Psychiatric Laboratory and Mental Health Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, PR China
| | - Yin Lin
- Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou Brain Hospital, Guangzhou, Guangdong, PR China; Psychiatric Laboratory and Mental Health Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, PR China
| | - Xiaohong Ma
- Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou Brain Hospital, Guangzhou, Guangdong, PR China; Psychiatric Laboratory and Mental Health Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, PR China
| | - Xuan Li
- Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou Brain Hospital, Guangzhou, Guangdong, PR China
| | - Yuping Liu
- Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou Brain Hospital, Guangzhou, Guangdong, PR China
| | - Biyu Ye
- Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou Brain Hospital, Guangzhou, Guangdong, PR China
| | - Guohui Lao
- Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou Brain Hospital, Guangzhou, Guangdong, PR China
| | - Yuwei Chen
- Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou Brain Hospital, Guangzhou, Guangdong, PR China
| | - Huiwei Liang
- Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou Brain Hospital, Guangzhou, Guangdong, PR China
| | - Yuanfei Wu
- Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou Brain Hospital, Guangzhou, Guangdong, PR China
| | - Yufen Ou
- Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou Brain Hospital, Guangzhou, Guangdong, PR China
| | - Weijie Huang
- Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou Brain Hospital, Guangzhou, Guangdong, PR China
| | - Wentao Liu
- Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou Brain Hospital, Guangzhou, Guangdong, PR China
| | - Qiang Wang
- Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou Brain Hospital, Guangzhou, Guangdong, PR China; Psychiatric Laboratory and Mental Health Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, PR China
| | - Yingcheng Wang
- Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou Brain Hospital, Guangzhou, Guangdong, PR China; Psychiatric Laboratory and Mental Health Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, PR China
| | - Liansheng Zhao
- Psychiatric Laboratory and Mental Health Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, PR China
| | - Tao Li
- Psychiatric Laboratory and Mental Health Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, PR China
| | - Xun Hu
- Psychiatric Laboratory and Mental Health Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, PR China.
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31
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Douet V, Chang L, Pritchett A, Lee K, Keating B, Bartsch H, Jernigan TL, Dale A, Akshoomoff N, Murray S, Bloss C, Kennedy DN, Amaral D, Gruen J, Kaufmann WE, Casey BJ, Sowell E, Ernst T. Schizophrenia-risk variant rs6994992 in the neuregulin-1 gene on brain developmental trajectories in typically developing children. Transl Psychiatry 2014; 4:e392. [PMID: 24865593 PMCID: PMC4035723 DOI: 10.1038/tp.2014.41] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Accepted: 04/22/2014] [Indexed: 11/09/2022] Open
Abstract
The neuregulin-1 (NRG1) gene is one of the best-validated risk genes for schizophrenia, and psychotic and bipolar disorders. The rs6994992 variant in the NRG1 promoter (SNP8NRG243177) is associated with altered frontal and temporal brain macrostructures and/or altered white matter density and integrity in schizophrenic adults, as well as healthy adults and neonates. However, the ages when these changes begin and whether neuroimaging phenotypes are associated with cognitive performance are not fully understood. Therefore, we investigated the association of the rs6994992 variant on developmental trajectories of brain macro- and microstructures, and their relationship with cognitive performance. A total of 972 healthy children aged 3-20 years had the genotype available for the NRG1-rs6994992 variant, and were evaluated with magnetic resonance imaging (MRI) and neuropsychological tests. Age-by-NRG1-rs6994992 interactions and genotype effects were assessed using a general additive model regression methodology, covaried for scanner type, socioeconomic status, sex and genetic ancestry factors. Compared with the C-carriers, children with the TT-risk-alleles had subtle microscopic and macroscopic changes in brain development that emerge or reverse during adolescence, a period when many psychiatric disorders are manifested. TT-children at late adolescence showed a lower age-dependent forniceal volume and lower fractional anisotropy; however, both measures were associated with better episodic memory performance. To our knowledge, we provide the first multimodal imaging evidence that genetic variation in NRG1 is associated with age-related changes on brain development during typical childhood and adolescence, and delineated the altered patterns of development in multiple brain regions in children with the T-risk allele(s).
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Affiliation(s)
- V Douet
- Department of Medicine, John A. Burns School of Medicine, University of Hawaii and Queen's Medical Center, Honolulu, HI, USA,Department of Medicine, John A. Burns School of Medicine, University of Hawaii and Queen's Medical Center, 1356 Lusitana Street, UH Tower, Room 716, Honolulu, HI 96813, USA. E-mail:
| | - L Chang
- Department of Medicine, John A. Burns School of Medicine, University of Hawaii and Queen's Medical Center, Honolulu, HI, USA
| | - A Pritchett
- Department of Medicine, John A. Burns School of Medicine, University of Hawaii and Queen's Medical Center, Honolulu, HI, USA
| | - K Lee
- Department of Medicine, John A. Burns School of Medicine, University of Hawaii and Queen's Medical Center, Honolulu, HI, USA
| | - B Keating
- Department of Medicine, John A. Burns School of Medicine, University of Hawaii and Queen's Medical Center, Honolulu, HI, USA
| | - H Bartsch
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
| | - T L Jernigan
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA,Department of Psychiatry and Department of Cognitive Science, Center for Human Development, University of California, San Diego, La Jolla, CA, USA
| | - A Dale
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA,Department of Neurosciences, University of California, San Diego, La Jolla, CA, USA
| | - N Akshoomoff
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA,Department of Psychiatry and Department of Cognitive Science, Center for Human Development, University of California, San Diego, La Jolla, CA, USA
| | - S Murray
- Scripps Genomic Medicine and Scripps Translational Science Institute, The Scripps Research Institute, La Jolla, CA, USA
| | - C Bloss
- Scripps Genomic Medicine and Scripps Translational Science Institute, The Scripps Research Institute, La Jolla, CA, USA
| | - D N Kennedy
- Department of Psychiatry, University of Massachusetts Medical School, Worcester, MA, USA
| | - D Amaral
- Departments of Psychiatry and Behavioral Sciences, University of California, Davis, CA, USA
| | - J Gruen
- Departments of Pediatrics and Investigative Medicine, Child Health Research Center, Yale University School of Medicine, New Haven, CT, USA
| | - W E Kaufmann
- Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - B J Casey
- Sackler Institute for Developmental Psychobiology, Weil Cornell Medical College, New York, NY, USA
| | - E Sowell
- Department of Pediatrics, University of Southern California, and Children's Hospital, Los Angeles, CA, USA
| | - T Ernst
- Department of Medicine, John A. Burns School of Medicine, University of Hawaii and Queen's Medical Center, Honolulu, HI, USA
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Knickmeyer RC, Wang J, Zhu H, Geng X, Woolson S, Hamer RM, Konneker T, Lin W, Styner M, Gilmore JH. Common variants in psychiatric risk genes predict brain structure at birth. Cereb Cortex 2014; 24:1230-46. [PMID: 23283688 PMCID: PMC3977618 DOI: 10.1093/cercor/bhs401] [Citation(s) in RCA: 97] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Studies in adolescents and adults have demonstrated that polymorphisms in putative psychiatric risk genes are associated with differences in brain structure, but cannot address when in development these relationships arise. To determine if common genetic variants in disrupted-in-schizophrenia-1 (DISC1; rs821616 and rs6675281), catechol-O-methyltransferase (COMT; rs4680), neuregulin 1 (NRG1; rs35753505 and rs6994992), apolipoprotein E (APOE; ε3ε4 vs. ε3ε3), estrogen receptor alpha (ESR1; rs9340799 and rs2234693), brain-derived neurotrophic factor (BDNF; rs6265), and glutamate decarboxylase 1 (GAD1; rs2270335) are associated with individual differences in brain tissue volumes in neonates, we applied both automated region-of-interest volumetry and tensor-based morphometry to a sample of 272 neonates who had received high-resolution magnetic resonance imaging scans. ESR1 (rs9340799) predicted intracranial volume. Local variation in gray matter (GM) volume was significantly associated with polymorphisms in DISC1 (rs821616), COMT, NRG1, APOE, ESR1 (rs9340799), and BDNF. No associations were identified for DISC1 (rs6675281), ESR1 (rs2234693), or GAD1. Of note, neonates homozygous for the DISC1 (rs821616) serine allele exhibited numerous large clusters of reduced GM in the frontal lobes, and neonates homozygous for the COMT valine allele exhibited reduced GM in the temporal cortex and hippocampus, mirroring findings in adults. The results highlight the importance of prenatal brain development in mediating psychiatric risk.
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Affiliation(s)
| | | | | | | | | | | | - Thomas Konneker
- Department of Biomolecular Engineering, University of California, Santa Cruz, CA, USA
| | | | - Martin Styner
- Department of Psychiatry
- Department of Computer Science, University of North Carolina, Chapel Hill, NC, USA and
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Marlinge E, Bellivier F, Houenou J. White matter alterations in bipolar disorder: potential for drug discovery and development. Bipolar Disord 2014; 16:97-112. [PMID: 24571279 DOI: 10.1111/bdi.12135] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2012] [Accepted: 05/24/2013] [Indexed: 12/15/2022]
Abstract
OBJECTIVES Brain white matter (WM) alterations have recently emerged as potentially relevant in bipolar disorder. New techniques such as diffusion tensor imaging allow precise exploration of these WM microstructural alterations in bipolar disorder. Our objective was to critically review WM alterations in bipolar disorder, using neuroimaging and neuropathological studies, in the context of neural models and the potential for drug discovery and development. METHODS We conducted a systematic PubMed and Google Scholar search of the WM and bipolar disorder literature up to and including January 2013. RESULTS Findings relating to WM alterations are consistent in neuroimaging and neuropathology studies of bipolar disorder, especially in regions involved in emotional processing such as the anterior frontal lobe, corpus callosum, cingulate cortex, and in fronto-limbic connections. Some of the structural alterations are related to genetic risk factors for bipolar disorder and may underlie the dysfunctional emotional processing described in recent neurobiological models of bipolar disorder. Medication effects in bipolar disorder, from lithium and other mood stabilizers, might impact myelinating processes, particularly by inhibition of glycogen synthase kinase-3 beta. CONCLUSIONS Pathways leading to WM alterations in bipolar disorder represent potential targets for the development and discovery of new drugs. Myelin damage in bipolar disorder suggests that the effects of existing pro-myelinating drugs should also be evaluated to improve our understanding and treatment of this disease.
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Affiliation(s)
- Emeline Marlinge
- AP-HP, Groupe Henri Mondor-Albert Chenevier, Pôle de Psychiatrie, Paris, France; Inserm, U955, Equipe 15 (Psychiatrie Génétique), Paris, France; Fondation Fondamental, Créteil, France; Neurospin, I2BM, CEA, Gif-Sur-Yvette, France
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Argyelan M, Ikuta T, DeRosse P, Braga RJ, Burdick KE, John M, Kingsley PB, Malhotra AK, Szeszko PR. Resting-state fMRI connectivity impairment in schizophrenia and bipolar disorder. Schizophr Bull 2014; 40:100-10. [PMID: 23851068 PMCID: PMC3885301 DOI: 10.1093/schbul/sbt092] [Citation(s) in RCA: 101] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Schizophrenia and bipolar disorder share aspects of phenomenology and neurobiology and thus may represent a continuum of disease. Few studies have compared connectivity across the brain in these disorders or investigated their functional correlates. METHODS We used resting-state functional magnetic resonance imaging to evaluate global and regional connectivity in 32 healthy controls, 19 patients with bipolar disorder, and 18 schizophrenia patients. Patients also received comprehensive neuropsychological and clinical assessments. We computed correlation matrices among 266 regions of interest within the brain, with the primary dependent measure being overall global connectivity strength of each region with every other region. RESULTS Patients with schizophrenia had significantly lower global connectivity compared with healthy controls, whereas patients with bipolar disorder had global connectivity intermediate to and significantly different from those of patients with schizophrenia and healthy controls. Post hoc analyses revealed that compared with healthy controls, both patient groups had significantly lower connectivity in the paracingulate gyrus and right thalamus. Patients with schizophrenia also had significantly lower connectivity in the temporal occipital fusiform cortex, left caudate nucleus, and left thalamus compared with healthy controls. There were no significant differences among the patient groups in any of these regions. Lower global connectivity among all patients was associated with worse neuropsychological and clinical functioning, but these effects were not specific to any patient group. CONCLUSIONS These findings are consistent with the hypothesis that schizophrenia and bipolar disorder may represent a continuum of global disconnectivity in the brain but that regional functional specificity may not be evident.
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Affiliation(s)
- Miklos Argyelan
- *To whom correspondence should be addressed; Psychiatry Research, Zucker Hillside Hospital, North Shore-LIJ Health System, 75-59 263rd Street, Glen Oaks, NY 11004, US; tel: 718-470-4486, fax: 718-343-1659, e-mail:
| | - Toshikazu Ikuta
- Center for Psychiatric Neuroscience, Feinstein Institute for Medical Research, Manhasset, NY; ,Psychiatry Research, Zucker Hillside Hospital, North Shore–LIJ Health System, Glen Oaks, NY;
| | - Pamela DeRosse
- Center for Psychiatric Neuroscience, Feinstein Institute for Medical Research, Manhasset, NY; ,Psychiatry Research, Zucker Hillside Hospital, North Shore–LIJ Health System, Glen Oaks, NY;
| | - Raphael J. Braga
- Center for Psychiatric Neuroscience, Feinstein Institute for Medical Research, Manhasset, NY; ,Psychiatry Research, Zucker Hillside Hospital, North Shore–LIJ Health System, Glen Oaks, NY;
| | | | - Majnu John
- Center for Psychiatric Neuroscience, Feinstein Institute for Medical Research, Manhasset, NY; ,Psychiatry Research, Zucker Hillside Hospital, North Shore–LIJ Health System, Glen Oaks, NY;
| | - Peter B. Kingsley
- Department of Radiology, North Shore University Hospital, Manhasset, NY;
| | - Anil K. Malhotra
- Center for Psychiatric Neuroscience, Feinstein Institute for Medical Research, Manhasset, NY; ,Psychiatry Research, Zucker Hillside Hospital, North Shore–LIJ Health System, Glen Oaks, NY; ,Departments of Psychiatry and Molecular Medicine, Hofstra North Shore–LIJ School of Medicine, Hempstead, NY
| | - Philip R. Szeszko
- Center for Psychiatric Neuroscience, Feinstein Institute for Medical Research, Manhasset, NY; ,Psychiatry Research, Zucker Hillside Hospital, North Shore–LIJ Health System, Glen Oaks, NY; ,Departments of Psychiatry and Molecular Medicine, Hofstra North Shore–LIJ School of Medicine, Hempstead, NY
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Anderson D, Ardekani BA, Burdick KE, Robinson DG, John M, Malhotra AK, Szeszko PR. Overlapping and distinct gray and white matter abnormalities in schizophrenia and bipolar I disorder. Bipolar Disord 2013; 15:680-93. [PMID: 23796123 PMCID: PMC3762889 DOI: 10.1111/bdi.12096] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2012] [Accepted: 01/13/2013] [Indexed: 11/28/2022]
Abstract
OBJECTIVES Schizophrenia and bipolar disorder may share common neurobiological mechanisms, but few studies have directly compared gray and white matter structure in these disorders. We used diffusion-weighted magnetic resonance imaging and a region of interest based analysis to identify overlapping and distinct gray and white matter abnormalities in 35 patients with schizophrenia and 20 patients with bipolar I disorder in comparison to 56 healthy volunteers. METHODS We examined fractional anisotropy within the white matter and mean diffusivity within the gray matter in 42 regions of interest defined on a probabilistic atlas following non-linear registration of the images to atlas space. RESULTS Patients with schizophrenia had significantly lower fractional anisotropy in temporal (superior temporal and parahippocampal) and occipital (superior and middle occipital) white matter compared to patients with bipolar disorder and healthy volunteers. By contrast, both patient groups demonstrated significantly higher mean diffusivity in frontal (inferior frontal and lateral orbitofrontal) and temporal (superior temporal and parahippocampal) gray matter compared to healthy volunteers, but did not differ from each other. CONCLUSIONS Our study implicates overlapping gray matter frontal and temporal lobe structural alterations in the neurobiology of schizophrenia and bipolar I disorder, but suggests that temporal and occipital lobe white matter deficits may be an additional risk factor for schizophrenia. Our findings may have relevance for future diagnostic classification systems and the identification of susceptibility genes for these disorders.
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Affiliation(s)
- Dana Anderson
- The Feinstein Institute for Medical Research, North Shore-LIJ Health System, Manhasset, NY,The Zucker Hillside Hospital, North Shore-LIJ Health System, Glen Oaks, NY
| | - Babak A. Ardekani
- The Nathan S. Kline Institute for Psychiatric Research, Orangeburg, NY
| | - Katherine E. Burdick
- Departments of Psychiatry and Neuroscience, Mount Sinai School of Medicine, NY, NY
| | - Delbert G. Robinson
- The Feinstein Institute for Medical Research, North Shore-LIJ Health System, Manhasset, NY,The Zucker Hillside Hospital, North Shore-LIJ Health System, Glen Oaks, NY,Hofstra North Shore – LIJ School of Medicine, Departments of Psychiatry and Molecular Medicine, Hempstead, NY, USA
| | - Majnu John
- The Feinstein Institute for Medical Research, North Shore-LIJ Health System, Manhasset, NY,The Zucker Hillside Hospital, North Shore-LIJ Health System, Glen Oaks, NY
| | - Anil K. Malhotra
- The Feinstein Institute for Medical Research, North Shore-LIJ Health System, Manhasset, NY,The Zucker Hillside Hospital, North Shore-LIJ Health System, Glen Oaks, NY,Hofstra North Shore – LIJ School of Medicine, Departments of Psychiatry and Molecular Medicine, Hempstead, NY, USA
| | - Philip R. Szeszko
- The Feinstein Institute for Medical Research, North Shore-LIJ Health System, Manhasset, NY,The Zucker Hillside Hospital, North Shore-LIJ Health System, Glen Oaks, NY,Hofstra North Shore – LIJ School of Medicine, Departments of Psychiatry and Molecular Medicine, Hempstead, NY, USA
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36
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Ozomaro U, Wahlestedt C, Nemeroff CB. Personalized medicine in psychiatry: problems and promises. BMC Med 2013; 11:132. [PMID: 23680237 PMCID: PMC3668172 DOI: 10.1186/1741-7015-11-132] [Citation(s) in RCA: 155] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2012] [Accepted: 04/19/2013] [Indexed: 01/29/2023] Open
Abstract
The central theme of personalized medicine is the premise that an individual's unique physiologic characteristics play a significant role in both disease vulnerability and in response to specific therapies. The major goals of personalized medicine are therefore to predict an individual's susceptibility to developing an illness, achieve accurate diagnosis, and optimize the most efficient and favorable response to treatment. The goal of achieving personalized medicine in psychiatry is a laudable one, because its attainment should be associated with a marked reduction in morbidity and mortality. In this review, we summarize an illustrative selection of studies that are laying the foundation towards personalizing medicine in major depressive disorder, bipolar disorder, and schizophrenia. In addition, we present emerging applications that are likely to advance personalized medicine in psychiatry, with an emphasis on novel biomarkers and neuroimaging.
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Affiliation(s)
- Uzoezi Ozomaro
- University of Miami, Leonard M. Miller School of Medicine, Miami, FL, USA
| | - Claes Wahlestedt
- University of Miami, Leonard M. Miller School of Medicine, Miami, FL, USA
- Center for Therapeutic Innovation, Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL, USA
- Department of Psychiatry and Behavioral Sciences, University of Miami, Leonard M. Miller School of Medicine, Miami, FL, USA
| | - Charles B Nemeroff
- University of Miami, Leonard M. Miller School of Medicine, Miami, FL, USA
- Center for Therapeutic Innovation, Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL, USA
- Department of Psychiatry and Behavioral Sciences, University of Miami, Leonard M. Miller School of Medicine, Miami, FL, USA
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Hatzimanolis A, McGrath JA, Wang R, Li T, Wong PC, Nestadt G, Wolyniec PS, Valle D, Pulver AE, Avramopoulos D. Multiple variants aggregate in the neuregulin signaling pathway in a subset of schizophrenia patients. Transl Psychiatry 2013; 3:e264. [PMID: 23715299 PMCID: PMC3669920 DOI: 10.1038/tp.2013.33] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Despite the strongly held view that schizophrenia (SZ) shows substantial genetic heterogeneity, pathway heterogeneity, as seen in cancer where different pathways are affected in similar tumors, has not been explored. We explore this possibility in a case-only study of the neuregulin signaling pathway (NSP), which has been prominently implicated in SZ and for which there is detailed knowledge on the ligand- and receptor-processing steps through β- and γ-secretase cleavage. We hypothesize that more than one damaging variants in the NSP genes might be necessary to cause disease, leading to an apparent clustering of such variants in only the few patients with affected NSP. We analyze linkage and next-generation sequencing results for the genes encoding components of the pathway, including NRG1, NRG3, ERBB4, β-secretase and the γ-secretase complex. We find multiple independent examples of supporting evidence for this hypothesis: (i) increased linkage scores over NSP genes, (ii) multiple positive interlocus correlations of linkage scores across families suggesting each family is linked to either many or none of the genes, (iii) aggregation of predicted damaging variants in a subset of individuals and (iv) significant phenotypic differences of the subset of patients carrying such variants. Collectively, our data strongly support the hypothesis that the NSP is affected by multiple damaging variants in a subset of phenotypically distinct patients. On the basis of this, we propose a general model of pathway heterogeneity in SZ, which, in part, may explain its phenotypic variability and genetic complexity.
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Affiliation(s)
- A Hatzimanolis
- Department of Psychiatry, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - J A McGrath
- Department of Psychiatry, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - R Wang
- Department of Psychiatry, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - T Li
- Departments of Pathology, Neurology and Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - P C Wong
- Departments of Pathology, Neurology and Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - G Nestadt
- Department of Psychiatry, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - P S Wolyniec
- Department of Psychiatry, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - D Valle
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - A E Pulver
- Department of Psychiatry, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - D Avramopoulos
- Department of Psychiatry, Johns Hopkins University School of Medicine, Baltimore, MD, USA,McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA,Department of Psychiatry, Johns Hopkins University School of Medicine, 733 North Broadway, Broadway Research Building Room 509, Baltimore, MD 21205, USA. E-mail:
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Gow M, Mirembe D, Longwe Z, Pickard BS. A gene trap mutagenesis screen for genes underlying cellular response to the mood stabilizer lithium. J Cell Mol Med 2013; 17:657-63. [PMID: 23577691 PMCID: PMC3822818 DOI: 10.1111/jcmm.12048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Accepted: 01/31/2013] [Indexed: 01/16/2023] Open
Abstract
Identifying the biological pathways mediating the action of a therapeutic compound may help the development of more specific treatments while also increasing our understanding of the underlying disease pathology. Salts of the metal lithium are commonly used as a front-line mood stabilizing treatment for bipolar disorder. Lithium's action has been variously linked to inositol phosphate metabolism and the WNT/Glycogen Synthase Kinase 3β (GSK3β)/β-Catenin signalling cascade, but, to date, little is known about which of these provides the principal therapeutic benefit for patients and, more specifically, which constituent genes, through presumed sequence variation, determine differences in patient response to treatment. Here, we describe a functional screen in which SH-SY5Y neuroblastoma cells were randomly mutated through genomic integration of the pMS1 poly A ‘gene trap’ plasmid vector. Lithium normally induces differentiation of neuroblastoma cells, but a small proportion of mutated cells continued to proliferate and formed colonies. Rapid amplification of cDNA ends (RACE)-PCR was used to identify the ‘trapped’ gene in each of these lithium-resistant colonies. Heterozygous, gene trap integrations were identified within ten genes, eight of which are likely to produce loss-of-function mutations including MED10, MSI2 and three long intergenic non-coding (LINC) RNAs. Both MED10 and MSI2 have been previously linked with WNT/GSK3β/β-Catenin pathway function suggesting that this is an important mediator of lithium action in this screen. The methodology applied here provides a rapid, objective and economic approach to define the genetic contribution to drug action, but could also be readily adapted to any desired in vitro functional selection/screening paradigm.
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Affiliation(s)
- Matthew Gow
- Undergraduate Biomedical Sciences Honours Degree Programmes, University of Strathclyde, Glasgow, UK
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Neuregulin 3 is associated with attention deficits in schizophrenia and bipolar disorder. Int J Neuropsychopharmacol 2013; 16:549-56. [PMID: 22831755 DOI: 10.1017/s1461145712000697] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Linkage and fine mapping studies have established that the neuregulin 3 gene (NRG3) is a susceptibility locus for schizophrenia. Association studies of this disorder have implicated NRG3 variants in both psychotic symptoms and attention performance. Psychotic symptoms and cognitive deficits are also frequent features of bipolar disorder. The aims of the present study were to extend analysis of the association between NRG3 and psychotic symptoms and attention in schizophrenia and to determine whether these associations also apply to bipolar disorder. A total of 358 patients with schizophrenia and 111 patients with bipolar disorder were included. Psychotic symptoms were evaluated using the Operational Criteria Checklist for Psychotic Illness (OPCRIT) and attention performance was assessed using the Trail Making Test (TMT). Symptoms and performance scores were then tested for association with the NRG3 variant rs6584400. A significant association was found between the number of rs6584400 minor alleles and the total OPCRIT score for psychotic symptoms in patients with schizophrenia. Moreover, in both schizophrenia and bipolar disorder patients, minor allele carriers of rs6584400 outperformed homozygous major allele carriers in the TMT. The results suggest that rs6584400 is associated with psychotic symptoms and attention performance in schizophrenia. The finding of a significant association between rs6584400 and attention performance in bipolar disorder supports the hypothesis that this NRG3 variant confers genetic susceptibility to cognitive deficits in both schizophrenia and bipolar disorder.
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Yang SA. Association between a Missense Polymorphism (rs3924999, Arg253Gln) of Neuregulin 1 and Schizophrenia in Korean Population. Exp Neurobiol 2013; 21:158-63. [PMID: 23319876 PMCID: PMC3538180 DOI: 10.5607/en.2012.21.4.158] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2012] [Accepted: 12/03/2012] [Indexed: 11/22/2022] Open
Abstract
Neuregulin 1 (NRG1) is associated with the pathogenesis of schizophrenia through controlling activation and signaling of neurotransmitter receptors. Influence to schizophrenia development by the NRG1 gene may differ in individuals, and genetic polymorphism is one of the factors affecting their differences. Association between three single nucleotide polymorphisms (SNPs) (rs7014762, -1174 A/T; rs11998176, -788 A/T; rs3924999, Arg253Gln) of NRG1 and the development of schizophrenia was analyzed in 221 schizophrneia and 359 control subjects. Polymerase chain reaction and direct sequencing were performed to obtain genotype data of NRG1 SNPs of the subjects. In analysis of genetic data, multiple logistic regression models (codominant1, codominant2, dominant, recessive, and log-additive model) were applied. SNPStats and SPSS 18.0 were used to calculate odds ratio (OR), 95% confidence interval (CI), and p-value of each model. The genotype distributions of rs3924999 were associated with schizophrenia development (OR=0.67, 95% CI=0.47-0.95, p=0.022 in the dominant model and OR=0.69, 95% CI=0.51-0.93, p=0.013 in the log-addtive model) and allelic distributions also showed significant association (OR=0.70, 95% CI=0.52-0.93, p=0.014). The results suggest that rs3924999 of the NRG1 gene may be associated with schizophrenia susceptibility.
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Affiliation(s)
- Seung-Ae Yang
- College of Nursing, Sungshin Women's University, Seoul 136-742, Korea
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Voineskos AN, Felsky D, Kovacevic N, Tiwari AK, Zai C, Chakravarty MM, Lobaugh NJ, Shenton ME, Rajji TK, Miranda D, Pollock BG, Mulsant BH, McIntosh AR, Kennedy JL. Oligodendrocyte genes, white matter tract integrity, and cognition in schizophrenia. ACTA ACUST UNITED AC 2012; 23:2044-57. [PMID: 22772651 DOI: 10.1093/cercor/bhs188] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Oligodendrocyte genes and white matter tracts have been implicated in the pathophysiology of schizophrenia and may play an important etiopathogenic role in cognitive dysfunction in schizophrenia. The objective of the present study in 60 chronic schizophrenia patients individually matched to 60 healthy controls was to determine whether 1) white matter tract integrity influences cognitive performance, 2) oligodendrocyte gene variants influence white matter tract integrity and cognitive performance, and 3) effects of oligodendrocyte gene variants on cognitive performance are mediated via white matter tract integrity. We used the partial least-squares multivariate approach to ascertain relationships among oligodendrocyte gene variants, integrity of cortico-cortical and subcortico-cortical white matter tracts, and cognitive performance. Robust relationships among oligodendrocyte gene variants, white matter tract integrity, and cognitive performance were found in both patients and controls. We also showed that effects of gene variants on cognitive performance were mediated by the integrity of white matter tracts. Our results were strengthened by bioinformatic analyses of gene variant function. To our knowledge, this is the first study that has brought together these lines of investigation in the same population and highlights the importance of the oligodendrocyte/white matter pathway in schizophrenia, particularly as it pertains to cognitive function.
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Affiliation(s)
- Aristotle N Voineskos
- Kimel Family Translational Imaging-Genetics Laboratory, Research Imaging Centre, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.
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Walshe M, Vassos E, Picchioni M, Shaikh M, Toulopoulou T, Collier D, McDonald C, Murray R, Bramon E. The Association between COMT, BDNF, and NRG1 and Premorbid Social Functioning in Patients with Psychosis, Their Relatives, and Controls. SCIENTIFICA 2012; 2012:560514. [PMID: 24278715 PMCID: PMC3820633 DOI: 10.6064/2012/560514] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2012] [Accepted: 05/15/2012] [Indexed: 06/02/2023]
Abstract
We investigated the influences of putative candidate genes for psychosis on premorbid social adjustment and on premorbid schizoid-schizotypal traits. A family-based sample was used including 177 patients with schizophrenia or bipolar I disorder with a history of psychotic symptoms, 86 of their unaffected relatives, and 116 unrelated healthy controls. Association analyses on the combined sample were conducted using the Statistical Analysis for Genetic Epidemiology software (SAGE) and adjusting for age, sex, clinical group, and the family-based nature of the data. The COMT Val(158)Met and BDNF Val(66)Met polymorphisms showed no evidence of association with either phenotype. The SNP rs221533 of the NRG1 gene was significantly associated with premorbid adjustment in adolescence with TT homozygous subjects having a poorer performance than C allele carriers. In the context of neurodevelopmental disorders such as schizophrenia and other psychoses, this finding is plausible; however, it is preliminary and requires replication in an independent sample. In a broader sense, the use of intermediate quantitative phenotypes such as the ones presented in this study may be of help to understand the mechanism of action of genetic risk factors.
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Affiliation(s)
- Muriel Walshe
- NIHR Biomedical Research Centre for Mental Health, South London and Maudsley NHS Foundation Trust and Institute of Psychiatry, Kings College London, P.O. Box 63, De Crespigny Park, London SE5 8AF, UK
| | - Evangelos Vassos
- NIHR Biomedical Research Centre for Mental Health, South London and Maudsley NHS Foundation Trust and Institute of Psychiatry, Kings College London, P.O. Box 63, De Crespigny Park, London SE5 8AF, UK
| | - Marco Picchioni
- NIHR Biomedical Research Centre for Mental Health, South London and Maudsley NHS Foundation Trust and Institute of Psychiatry, Kings College London, P.O. Box 63, De Crespigny Park, London SE5 8AF, UK
| | - Madiha Shaikh
- NIHR Biomedical Research Centre for Mental Health, South London and Maudsley NHS Foundation Trust and Institute of Psychiatry, Kings College London, P.O. Box 63, De Crespigny Park, London SE5 8AF, UK
| | - Timothea Toulopoulou
- NIHR Biomedical Research Centre for Mental Health, South London and Maudsley NHS Foundation Trust and Institute of Psychiatry, Kings College London, P.O. Box 63, De Crespigny Park, London SE5 8AF, UK
| | - David Collier
- NIHR Biomedical Research Centre for Mental Health, South London and Maudsley NHS Foundation Trust and Institute of Psychiatry, Kings College London, P.O. Box 63, De Crespigny Park, London SE5 8AF, UK
| | - Colm McDonald
- Department of Psychiatry, Clinical Science Institute, National University of Ireland, Galway, Ireland
| | - Robin Murray
- NIHR Biomedical Research Centre for Mental Health, South London and Maudsley NHS Foundation Trust and Institute of Psychiatry, Kings College London, P.O. Box 63, De Crespigny Park, London SE5 8AF, UK
| | - Elvira Bramon
- NIHR Biomedical Research Centre for Mental Health, South London and Maudsley NHS Foundation Trust and Institute of Psychiatry, Kings College London, P.O. Box 63, De Crespigny Park, London SE5 8AF, UK
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Schizophrenia-associated HapICE haplotype is associated with increased NRG1 type III expression and high nucleotide diversity. Transl Psychiatry 2012; 2:e104. [PMID: 22832904 PMCID: PMC3337073 DOI: 10.1038/tp.2012.25] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Excitement and controversy have followed neuregulin (NRG1) since its discovery as a putative schizophrenia susceptibility gene; however, the mechanism of action of the associated risk haplotype (HapICE) has not been identified, and specific genetic variations, which may increase risk to schizophrenia have remained elusive. Using a postmortem brain cohort from 37 schizophrenia cases and 37 controls, we resequenced upstream of the type I-IV promoters, and the HapICE repeat regions in intron 1. Relative abundance of seven NRG1 mRNA transcripts in the prefrontal cortex were determined and compared across diagnostic and genotypic groups. We identified 26 novel DNA variants and showed an increased novel variant load in cases compared with controls (χ(2)=7.815; P=0.05). The average nucleotide diversity (θ = 10.0 × 10(-4)) was approximately twofold higher than that previously reported for BDNF, indicating that NRG1 may be particularly prone to genetic change. A greater nucleotide diversity was observed in the HapICE linkage disequilibrium block in schizophrenia cases (θ((case)) = 13.2 × 10(-4); θ((control)) = 10.0 × 10(-4)). The specific HapICE risk haplotype was associated with increased type III mRNA (F = 3.76, P = 0.028), which in turn, was correlated with an earlier age of onset (r = -0.343, P = 0.038). We found a novel intronic five-SNP haplotype ~730 kb upstream of the type I promoter and determined that this region functions as transcriptional enhancer that is suppressed by SRY. We propose that the HapICE risk haplotype increases expression of the most brain-abundant form of NRG1, which in turn, elicits an earlier clinical presentation, thus providing a novel mechanism through which this genetic association may increase risk of schizophrenia.
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Kim SH, Song JY, Joo EJ, Lee KY, Shin SY, Lee YH, Ahn YM, Kim YS. Genetic association of the EGR2 gene with bipolar disorder in Korea. Exp Mol Med 2012; 44:121-9. [PMID: 22089088 PMCID: PMC3296808 DOI: 10.3858/emm.2012.44.2.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/10/2011] [Indexed: 12/23/2022] Open
Abstract
The early growth response gene 2 (EGR2) is located at chromosome 10q21, one of the susceptibility loci in bipolar disorder (BD). EGR2 is involved in cognitive function, myelination, and signal transduction related to neuregulin-ErbB receptor, Bcl-2 family proteins, and brain-derived neurotrophic factor. This study investigated the genetic association of the EGR2 gene with BD and schizophrenia (SPR) in Korea. In 946 subjects (350 healthy controls, 352 patients with BD, and 244 with SPR), nine single nucleotide polymorphisms (SNPs) in the EGR2 gene region were genotyped. Five SNPs showed nominally significant allelic associations with BD (rs2295814, rs61865882, rs10995315, rs2297488, and rs2297489), and the positive associations of all except rs2297488 remained significant after multiple testing correction. Linkage disequilibrium structure analysis revealed two haplotype blocks. Among the common identified haplotypes (frequency > 5%), 'T-G-A-C-T (block 1)' and 'A-A-G-C (block 2)' haplotypes were over-represented, while 'C-G-G-T-T (block 1)' haplotype was under-represented in BD. In contrast, no significant associations were found with SPR. Although an extended analysis with a larger sample size or independent replication is required, these findings suggest a genetic association of EGR2 with BD. Combined with a plausible biological function of EGR2, the EGR2 gene is a possible susceptibility gene in BD.
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Affiliation(s)
- Se Hyun Kim
- Department of Neuropsychiatry, Seoul National University Hospital, Korea
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Benes FM. Nicotinic receptors and functional regulation of GABA cell microcircuitry in bipolar disorder and schizophrenia. Handb Exp Pharmacol 2012:401-17. [PMID: 23027422 DOI: 10.1007/978-3-642-25758-2_13] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Studies of the hippocampus in postmortem brains from patients with schizophrenia and bipolar disorder have provided evidence for a defect of GABAergic interneurons. Significant decreases in the expression of GAD67, a marker for GABA cell function, have been found repeatedly in several different brain regions that include the hippocampus. In this region, nicotinic receptors are thought to play an important role in modulating the activity of GABAergic interneurons by influences of excitatory cholinergic afferents on their activity. In bipolar disorder, this influence appears to be particularly prominent in the stratum oriens of sectors CA3/2 and CA1, two sites where these cells constitute the exclusive neuronal cell type. In sector CA3/2, this layer receives a robust excitatory projection from the basolateral amygdala (BLA) and this is thought to play a central role in regulating GABA cells at this locus. Using laser microdissection, recent studies have focused selectively on these two layers and their associated GABA cells using microarray technology. The results have provided support for the idea that nicotinic cholinergic receptors play a particularly important role in regulating the activity of GABA neurons at these loci by regulating the progression of cell cycle and the repair of damaged DNA. In bipolar disorder, there is a prominent reduction in the expression of mRNAs for several different nicotinic subunit isoforms. These decreases could reflect a diminished influence of this receptor system on these GABA cells, particularly in sector CA3/2 where a preponderance of abnormalities have been observed in postmortem studies. In patients with bipolar disorder, excitatory nicotinic cholinergic fibers from the medial septum may converge with glutamatergic fibers from the BLA on GABAergic interneurons in the stratum oriens of CA3/2 and result in disturbances of their genomic and functional integrity, ones that may induce disruptions of the integration of microcircuitry within this region.
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Neddens J, Buonanno A. Expression of the neuregulin receptor ErbB4 in the brain of the rhesus monkey (Macaca mulatta). PLoS One 2011; 6:e27337. [PMID: 22087295 PMCID: PMC3210802 DOI: 10.1371/journal.pone.0027337] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2011] [Accepted: 10/14/2011] [Indexed: 02/03/2023] Open
Abstract
We demonstrated recently that frontal cortical expression of the Neuregulin (NRG) receptor ErbB4 is restricted to interneurons in rodents, macaques, and humans. However, little is known about protein expression patterns in other areas of the brain. In situ hybridization studies have shown high ErbB4 mRNA levels in various subcortical areas, suggesting that ErbB4 is also expressed in cell types other than cortical interneurons. Here, using highly-specific monoclonal antibodies, we provide the first extensive report of ErbB4 protein expression throughout the cerebrum of primates. We show that ErbB4 immunoreactivity is high in association cortices, intermediate in sensory cortices, and relatively low in motor cortices. The overall immunoreactivity in the hippocampal formation is intermediate, but is high in a subset of interneurons. We detected the highest overall immunoreactivity in distinct locations of the ventral hypothalamus, medial habenula, intercalated nuclei of the amygdala and structures of the ventral forebrain, such as the islands of Calleja, olfactory tubercle and ventral pallidum, and medium expression in the reticular thalamic nucleus. While this pattern is generally consistent with ErbB4 mRNA expression data, further investigations are needed to identify the exact cellular and subcellular sources of mRNA and protein expression in these areas. In contrast to in situ hybridization in rodents, we detected only low levels of ErbB4-immunoreactivity in mesencephalic dopaminergic nuclei but a diffuse pattern of immunofluorescence that was medium in the dorsal striatum and high in the ventral forebrain, suggesting that most ErbB4 protein in dopaminergic neurons could be transported to axons. We conclude that the NRG-ErbB4 signaling pathway can potentially influence many functional systems throughout the brain of primates, and suggest that major sites of action are areas of the “corticolimbic” network. This interpretation is functionally consistent with the genetic association of NRG1 and ERBB4 with schizophrenia.
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Affiliation(s)
- Jörg Neddens
- Section on Molecular Neurobiology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, United States of America.
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Mahar I, Tan S, Davoli MA, Dominguez-Lopez S, Qiang C, Rachalski A, Turecki G, Mechawar N. Subchronic peripheral neuregulin-1 increases ventral hippocampal neurogenesis and induces antidepressant-like effects. PLoS One 2011; 6:e26610. [PMID: 22028923 PMCID: PMC3197569 DOI: 10.1371/journal.pone.0026610] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2011] [Accepted: 09/29/2011] [Indexed: 02/07/2023] Open
Abstract
Background Adult hippocampal neurogenesis has been implicated in the mechanism of antidepressant action, and neurotrophic factors can mediate the neurogenic changes underlying these effects. The neurotrophic factor neuregulin-1 (NRG1) is involved in many aspects of brain development, from cell fate determination to neuronal maturation. However, nothing is known about the influence of NRG1 on neurodevelopmental processes occurring in the mature hippocampus. Methods Adult male mice were given subcutaneous NRG1 or saline to assess dentate gyrus proliferation and neurogenesis, as well as cell fate determination. Mice also underwent behavioral testing. Expression of ErbB3 and ErbB4 NRG1 receptors in newborn dentate gyrus cells was assessed at various time points between birth and maturity. The phenotype of ErbB-expressing progenitor cells was also characterized with cell type-specific markers. Results The current study shows that subchronic peripheral NRG1β administration selectively increased cell proliferation (by 71%) and neurogenesis (by 50%) in the caudal dentate gyrus within the ventral hippocampus. This pro-proliferative effect did not alter neuronal fate, and may have been mediated by ErbB3 receptors, which were expressed by newborn dentate gyrus cells from cell division to maturity and colocalized with SOX2 in the subgranular zone. Furthermore, four weeks after cessation of subchronic treatment, animals displayed robust antidepressant-like behavior in the absence of changes in locomotor activity, whereas acute treatment did not produce antidepressant effects. Conclusions These results show that neuregulin-1β has pro-proliferative, neurogenic and antidepressant properties, further highlight the importance of peripheral neurotrophic factors in neurogenesis and mood, and support the role of hippocampal neurogenesis in mediating antidepressant effects.
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Affiliation(s)
- Ian Mahar
- McGill Group for Suicide Studies, Douglas Mental Health University Institute, McGill University, Verdun, Québec, Canada
- Department of Neurology and Neurosurgery, McGill University, Montréal, Québec, Canada
| | - Stephanie Tan
- McGill Group for Suicide Studies, Douglas Mental Health University Institute, McGill University, Verdun, Québec, Canada
| | - Maria Antonietta Davoli
- McGill Group for Suicide Studies, Douglas Mental Health University Institute, McGill University, Verdun, Québec, Canada
| | | | - Calvin Qiang
- McGill Group for Suicide Studies, Douglas Mental Health University Institute, McGill University, Verdun, Québec, Canada
| | - Adeline Rachalski
- McGill Group for Suicide Studies, Douglas Mental Health University Institute, McGill University, Verdun, Québec, Canada
| | - Gustavo Turecki
- McGill Group for Suicide Studies, Douglas Mental Health University Institute, McGill University, Verdun, Québec, Canada
- Department of Psychiatry and McGill University, Montréal, Québec, Canada
- Department of Neurology and Neurosurgery, McGill University, Montréal, Québec, Canada
| | - Naguib Mechawar
- McGill Group for Suicide Studies, Douglas Mental Health University Institute, McGill University, Verdun, Québec, Canada
- Department of Psychiatry and McGill University, Montréal, Québec, Canada
- Department of Neurology and Neurosurgery, McGill University, Montréal, Québec, Canada
- * E-mail:
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Moon E, Rollins B, Mesén A, Sequeira A, Myers RM, Akil H, Watson SJ, Barchas J, Jones EG, Schatzberg A, Bunney WE, DeLisi LE, Byerley W, Vawter MP. Lack of association to a NRG1 missense polymorphism in schizophrenia or bipolar disorder in a Costa Rican population. Schizophr Res 2011; 131:52-7. [PMID: 21745728 PMCID: PMC3159824 DOI: 10.1016/j.schres.2011.06.024] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2011] [Revised: 06/15/2011] [Accepted: 06/20/2011] [Indexed: 12/30/2022]
Abstract
A missense polymorphism in the NRG1 gene, Val>Leu in exon 11, was reported to increase the risk of schizophrenia in selected families from the Central Valley region of Costa Rica (CVCR). The present study investigated the relationship between three NRG1 genetic variants, rs6994992, rs3924999, and Val>Leu missense polymorphism in exon 11, in cases and selected controls from an isolated population from the CVCR. Isolated populations can have less genetic heterogeneity and increase power to detect risk variants in candidate genes. Subjects with bipolar disorder (BD, n=358), schizophrenia (SZ, n=273), or unrelated controls (CO, n=479) were genotyped for three NRG1 variants. The NRG1 promoter polymorphism (rs6994992) was related to altered expression of NRG1 Type IV in other studies. The expression of NRG1 type IV in the dorsolateral prefrontal cortex (DLPFC) and the effect of the rs6994992 genotype on expression were explored in a postmortem cohort of BD, SZ, major depressive disorder (MDD) cases, and controls. The missense polymorphism Val>Leu in exon 11 was not significantly associated with schizophrenia as previously reported in a family sample from this population, the minor allele frequency is 4%, thus our sample size is not large enough to detect an association. We observed however an association of rs6994992 with NRG1 type IV expression in DLPFC and a significantly decreased expression in MDD compared to controls. The present results while negative do not rule out a genetic association of these SNPs with BD and SZ in CVCR, perhaps due to small risk effects that we were unable to detect and potential intergenic epistasis. The previous genetic relationship between expression of a putative brain-specific isoform of NRG1 type IV and SNP variation was replicated in postmortem samples in our preliminary study.
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Affiliation(s)
- Emily Moon
- Department of Psychiatry and Human Behavior, School of Medicine, University of California, Irvine, CA, USA
| | - Brandi Rollins
- Department of Psychiatry and Human Behavior, School of Medicine, University of California, Irvine, CA, USA
| | - Andrea Mesén
- ACENP of Costa Rica, Center of Neuropsychiatric Studies of Costa Rica, San José, Costa Rica
| | - Adolfo Sequeira
- Department of Psychiatry and Human Behavior, School of Medicine, University of California, Irvine, CA, USA
| | - Richard M. Myers
- HudsonAlpha Institute for Biotechnology, Huntsville, Alabama, USA
| | - Huda Akil
- Molecular and Behavioral Neuroscience Institute, University of Michigan, Ann Arbor, MI, USA
| | - Stanley J. Watson
- Molecular and Behavioral Neuroscience Institute, University of Michigan, Ann Arbor, MI, USA
| | - Jack Barchas
- Department of Psychiatry, Cornell University, New York, NY, USA
| | - Edward G. Jones
- Neuroscience Center, University of California, Davis, CA, USA
| | - Alan Schatzberg
- Department of Psychiatry, Stanford University, Palo Alto, CA, USA
| | - William E. Bunney
- Department of Psychiatry and Human Behavior, School of Medicine, University of California, Irvine, CA, USA
| | | | - William Byerley
- Department of Psychiatry, University of California, San Francisco, CA, USA
| | - Marquis P. Vawter
- Department of Psychiatry and Human Behavior, School of Medicine, University of California, Irvine, CA, USA,Corresponding author: , (949) 824-9014
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Fagnani C, Bellani M, Tansella M, Balestrieri M, Toccaceli V, Patriarca V, Stazi MA, Brambilla P. Investigation of shared genetic effects for psychotic and obsessive symptoms in young adult twins. Psychiatry Res 2011; 188:276-82. [PMID: 21215460 DOI: 10.1016/j.psychres.2010.12.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2010] [Revised: 11/29/2010] [Accepted: 12/01/2010] [Indexed: 11/29/2022]
Abstract
Genetic and environmental architecture of psychotic and obsessive symptoms are not completely elucidated. This study estimated for these symptoms (i) the genetic and environmental components, (ii) the within-individual association, and (iii) the extent to which this association originates from common genetic and environmental factors. Young adult twins (N=701) from the population-based Italian Twin Register were assessed for psychotic and obsessive-compulsive symptoms by using the Symptom Check List (SCL-90). Multivariate Cholesky models were fitted by the Mx statistical program. No previous study used this design to examine the same dimensions. The best-fitting model included additive genetic and nonshared environmental components, each accounting for about half of total variance in the symptoms. Genetic influences on the different symptoms overlapped considerably (r(g)=0.81 to 0.99). Phenotypic correlations of psychotic symptoms and of psychotic with obsessive symptoms were high (r=0.61 to 0.76), with 53% to 69% explained by shared genetic effects. This study shows substantial genetic influence on psychotic and obsessive symptoms, and indicates that their co-occurrence may be due to genetic factors to a greater extent than to environmental effects. These results encourage the search for genetic and environmental factors underlying the covariance between different psychotic traits as well as between psychotic and obsessive traits.
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Affiliation(s)
- Corrado Fagnani
- National Centre for Epidemiology, Surveillance and Health Promotion, Genetic Epidemiology Unit, Istituto Superiore di Sanità, Rome, Italy
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Lin F, Weng S, Xie B, Wu G, Lei H. Abnormal frontal cortex white matter connections in bipolar disorder: a DTI tractography study. J Affect Disord 2011; 131:299-306. [PMID: 21236494 DOI: 10.1016/j.jad.2010.12.018] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2010] [Revised: 12/17/2010] [Accepted: 12/17/2010] [Indexed: 02/07/2023]
Abstract
OBJECTIVE In bipolar disorder, white matter abnormalities have been reported with region-of-interest and voxel-based methods; however, deficits in specific white matter tracts cannot be localized by these methods. Therefore, in this study, we aimed to investigate the white matter tracts that mediate connectivity of the frontal cortex using diffusion tensor imaging (DTI) tractography. METHODS Eighteen patients with bipolar disorder and sixteen age- and gender-matched healthy subjects underwent DTI examinations. Frontal cortex white matter tracts, including the anterior thalamic radiation (ATR), uncinate fasciculus (UF), superior longitudinal fasciculus (SLF), cingulum, and inferior fronto-occipital fasciculus (IFO) were reconstructed by DTI tractography, and we calculated the mean fractional anisotropy (FA) for each fiber tract. The values were compared between groups by repeated measures analysis of variance with age and gender as covariates, which allowed us to investigate significant differences between the tracts. RESULTS When compared with healthy controls, the patients with bipolar disorder showed significantly decreased FA in the ATR and UF, and a trend towards lower FA in the SLF and cingulum. However, there were no FA differences between groups in the IFO. CONCLUSIONS Our study indicates that bipolar patients show abnormalities within white matter tracts connecting the frontal cortex with the temporal and parietal cortices and the fronto-subcortical circuits. These findings suggest that alterations in the connectivity of white matter tracts in the frontal cortex might contribute to the neuropathology of bipolar disorder.
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Affiliation(s)
- Fuchun Lin
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China.
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