1
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Mamah D, Patel A, Chen S, Wang Y, Wang Q. Diffusion Basis Spectrum Imaging of White Matter in Schizophrenia and Bipolar Disorder. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.07.07.602402. [PMID: 39005300 PMCID: PMC11245098 DOI: 10.1101/2024.07.07.602402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/16/2024]
Abstract
Background Multiple studies point to the role of neuroinflammation in the pathophysiology of schizophrenia (SCZ), however, there have been few in vivo tools for imaging brain inflammation. Diffusion basis spectrum imaging (DBSI) is an advanced diffusion-based MRI method developed to quantitatively assess microstructural alternations relating to neuroinflammation, axonal fiber, and other white matter (WM) pathologies. Methods We acquired one-hour-long high-directional diffusion MRI data from young control (CON, n = 27), schizophrenia (SCZ, n = 21), and bipolar disorder (BPD, n = 21) participants aged 18-30. We applied Tract-based Spatial Statistics (TBSS) to allow whole-brain WM analyses and compare DBSI-derived isotropic and anisotropic diffusion measures between groups. Clinical relationships of DBSI metrics with clinical symptoms were assessed across SCZ and control participants. Results In SCZ participants, we found a generalized increase in DBSI-derived cellularity (a putative marker of neuroinflammation), a decrease in restricted fiber fraction (a putative marker of apparent axonal density), and an increase in extra-axonal water (a putative marker of vasogenic edema) across several WM tracts. There were only minimal WM abnormalities noted in BPD, mainly in regions of the corpus callosum (increase in DTI-derived RD and extra-axonal water). DBSI metrics showed significant partial correlations with psychosis and mood symptoms across groups. Conclusion Our findings suggest that SCZ involves generalized white matter neuroinflammation, decreased fiber density, and demyelination, which is not seen in bipolar disorder. Larger studies are needed to identify medication-related effects. DBSI metrics could help identify high-risk groups requiring early interventions to prevent the onset of psychosis and improve outcomes.
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Affiliation(s)
- Daniel Mamah
- Department of Psychiatry, Washington University School of Medicine, St. Louis, Missouri
| | - Aakash Patel
- Department of Psychiatry, Washington University School of Medicine, St. Louis, Missouri
| | - ShingShiun Chen
- Department of Psychiatry, Washington University School of Medicine, St. Louis, Missouri
| | - Yong Wang
- Departments of Obstetrics and Gynecology, Washington University School of Medicine, St. Louis, Missouri
- Department of Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, Missouri
- Department of Biomedical Engineering, Washington University School of Medicine, St. Louis, Missouri
- Mechanical Engineering and Materials Science, Washington University School of Medicine, St. Louis, Missouri
| | - Qing Wang
- Department of Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, Missouri
- Department of Biomedical Engineering, Washington University School of Medicine, St. Louis, Missouri
- Mechanical Engineering and Materials Science, Washington University School of Medicine, St. Louis, Missouri
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2
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Gangadin SS, Enthoven AD, van Beveren NJM, Laman JD, Sommer IEC. Immune Dysfunction in Schizophrenia Spectrum Disorders. Annu Rev Clin Psychol 2024; 20:229-257. [PMID: 38996077 DOI: 10.1146/annurev-clinpsy-081122-013201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/14/2024]
Abstract
Evidence from epidemiological, clinical, and biological research resulted in the immune hypothesis: the hypothesis that immune system dysfunction is involved in the pathophysiology of schizophrenia spectrum disorders (SSD). The promising implication of this hypothesis is the potential to use existing immunomodulatory treatment for innovative interventions for SSD. Here, we provide a selective historical review of important discoveries that have shaped our understanding of immune dysfunction in SSD. We first explain the basic principles of immune dysfunction, after which we travel more than a century back in time. Starting our journey with neurosyphilis-associated psychosis in the nineteenth century, we continue by evaluating the role of infections and autoimmunity in SSD and findings from assessment of immune function using new techniques, such as cytokine levels, microglia density, neuroimaging, and gene expression. Drawing from these findings, we discuss anti-inflammatory interventions for SSD, and we conclude with a look into the future.
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Affiliation(s)
- S S Gangadin
- Department of Psychiatry, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands;
| | - A D Enthoven
- Department of Psychiatry, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands;
| | - N J M van Beveren
- Department of Neuroscience, Erasmus MC, Rotterdam, The Netherlands
- Parnassia Group for Mental Health Care, The Hague and Rotterdam, The Netherlands
| | - J D Laman
- Department of Pathology and Medical Biology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - I E C Sommer
- Department of Psychiatry, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands;
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3
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Klein HC, Guest PC, Dobrowolny H, Steiner J. Inflammation and viral infection as disease modifiers in schizophrenia. Front Psychiatry 2023; 14:1231750. [PMID: 37850104 PMCID: PMC10577328 DOI: 10.3389/fpsyt.2023.1231750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 09/12/2023] [Indexed: 10/19/2023] Open
Abstract
Numerous studies have now implicated a role for inflammation in schizophrenia. However, many aspects surrounding this aspect of the disease are still controversial. This controversy has been driven by conflicting evidence on the role of both pro-and anti-inflammatory factors and by often contentious findings concerning cytokine and immune cell profiles in the central nervous system and periphery. Current evidence supports the point that interleukin-6 is elevated in CSF, but does not support activation of microglia, resident macrophage-like cells in the brain. Furthermore, the mechanisms involving transit of the peripheral immune system factors across the blood brain barrier to central parenchyma have still not been completely elucidated. This process appears to involve perivascular macrophages and accompanying dendritic cells retained in the parenchyma by the chemokine and cytokine composition of the surrounding milieu. In addition, a number of studies have shown that this can be modulated by infection with viruses such as herpes simplex virus type I which may disrupt antigen presentation in the perivascular space, with long-lasting consequences. In this review article, we discuss the role of inflammation and viral infection as potential disease modifiers in schizophrenia. The primary viral hit may occur in the fetus in utero, transforming the immune response regulatory T-cells or the virus may secondarily remain latent in immune cells or neurons and modify further immune responses in the developing individual. It is hoped that unraveling this pathway further and solidifying our understanding of the pathophysiological mechanisms involved will pave the way for future studies aimed at identification and implementation of new biomarkers and drug targets. This may facilitate the development of more effective personalized therapies for individuals suffering with schizophrenia.
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Affiliation(s)
- Hans C. Klein
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, Netherlands
- Research and Education Department Addiction Care Northern Netherlands, Groningen, Netherlands
| | - Paul C. Guest
- Department of Psychiatry, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany
- Laboratory of Translational Psychiatry, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany
- Laboratory of Neuroproteomics, Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil
| | - Henrik Dobrowolny
- Department of Psychiatry, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany
- Laboratory of Translational Psychiatry, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany
| | - Johann Steiner
- Department of Psychiatry, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany
- Laboratory of Translational Psychiatry, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany
- Center for Health and Medical Prevention (CHaMP), Magdeburg, Germany
- German Center for Mental Health (DZPG), Center for Intervention and Research on Adaptive and Maladaptive Brain Circuits Underlying Mental Health (C-I-R-C), Halle-Jena-Magdeburg, Germany
- Center for Behavioral Brain Sciences (CBBS), Magdeburg, Germany
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4
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Moradi Chameh H, Rich S, Wang L, Chen FD, Zhang L, Carlen PL, Tripathy SJ, Valiante TA. Diversity amongst human cortical pyramidal neurons revealed via their sag currents and frequency preferences. Nat Commun 2021; 12:2497. [PMID: 33941783 PMCID: PMC8093195 DOI: 10.1038/s41467-021-22741-9] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Accepted: 03/24/2021] [Indexed: 02/03/2023] Open
Abstract
In the human neocortex coherent interlaminar theta oscillations are driven by deep cortical layers, suggesting neurons in these layers exhibit distinct electrophysiological properties. To characterize this potential distinctiveness, we use in vitro whole-cell recordings from cortical layers 2 and 3 (L2&3), layer 3c (L3c) and layer 5 (L5) of the human cortex. Across all layers we observe notable heterogeneity, indicating human cortical pyramidal neurons are an electrophysiologically diverse population. L5 pyramidal cells are the most excitable of these neurons and exhibit the most prominent sag current (abolished by blockade of the hyperpolarization activated cation current, Ih). While subthreshold resonance is more common in L3c and L5, we rarely observe this resonance at frequencies greater than 2 Hz. However, the frequency dependent gain of L5 neurons reveals they are most adept at tracking both delta and theta frequency inputs, a unique feature that may indirectly be important for the generation of cortical theta oscillations.
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Affiliation(s)
- Homeira Moradi Chameh
- grid.231844.80000 0004 0474 0428Krembil Brain Institute, University Health Network, Toronto, ON Canada
| | - Scott Rich
- grid.231844.80000 0004 0474 0428Krembil Brain Institute, University Health Network, Toronto, ON Canada
| | - Lihua Wang
- grid.231844.80000 0004 0474 0428Krembil Brain Institute, University Health Network, Toronto, ON Canada
| | - Fu-Der Chen
- grid.17063.330000 0001 2157 2938Department of Electrical and Computer Engineering, University of Toronto, Toronto, ON Canada ,grid.450270.40000 0004 0491 5558Max Planck Institute of Microstructure Physics, Halle, Germany
| | - Liang Zhang
- grid.231844.80000 0004 0474 0428Krembil Brain Institute, University Health Network, Toronto, ON Canada ,grid.17063.330000 0001 2157 2938Departments of Medicine & Physiology, University of Toronto, Toronto, ON Canada
| | - Peter L. Carlen
- grid.231844.80000 0004 0474 0428Krembil Brain Institute, University Health Network, Toronto, ON Canada ,grid.17063.330000 0001 2157 2938Departments of Medicine & Physiology, University of Toronto, Toronto, ON Canada ,grid.17063.330000 0001 2157 2938Institute of Biomedical Engineering, University of Toronto, Toronto, ON Canada
| | - Shreejoy J. Tripathy
- grid.155956.b0000 0000 8793 5925Krembil Centre for Neuroinformatics, Centre for Addiction and Mental Health, Toronto, ON Canada ,grid.17063.330000 0001 2157 2938Institute of Medical Sciences, University of Toronto, Toronto, ON Canada ,grid.17063.330000 0001 2157 2938Department of Psychiatry, University of Toronto, Toronto, ON Canada
| | - Taufik A. Valiante
- grid.231844.80000 0004 0474 0428Krembil Brain Institute, University Health Network, Toronto, ON Canada ,grid.17063.330000 0001 2157 2938Department of Electrical and Computer Engineering, University of Toronto, Toronto, ON Canada ,grid.17063.330000 0001 2157 2938Institute of Biomedical Engineering, University of Toronto, Toronto, ON Canada ,grid.17063.330000 0001 2157 2938Institute of Medical Sciences, University of Toronto, Toronto, ON Canada ,grid.17063.330000 0001 2157 2938Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, ON Canada
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5
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Föcking M, Sabherwal S, Cates HM, Scaife C, Dicker P, Hryniewiecka M, Wynne K, Rutten BPF, Lewis G, Cannon M, Nestler EJ, Heurich M, Cagney G, Zammit S, Cotter DR. Complement pathway changes at age 12 are associated with psychotic experiences at age 18 in a longitudinal population-based study: evidence for a role of stress. Mol Psychiatry 2021; 26:524-533. [PMID: 30635638 PMCID: PMC6906256 DOI: 10.1038/s41380-018-0306-z] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 09/06/2018] [Accepted: 10/30/2018] [Indexed: 02/08/2023]
Abstract
The complement cascade is a major component of the immune defence against infection, and there is increasing evidence for a role of dysregulated complement in major psychiatric disorders. We undertook a directed proteomic analysis of the complement signalling pathway (n = 29 proteins) using data-independent acquisition. Participants were recruited from the UK avon longitudinal study of parents and children (ALSPAC) cohort who participated in psychiatric assessment interviews at ages 12 and 18. Protein expression levels at age 12 among individuals who reported psychotic experiences (PEs) at age 18 (n = 64) were compared with age-matched controls (n = 67). Six out of the 29 targeted complement proteins or protein subcomponents were significantly upregulated following correction for multiple comparisons (VTN↑, C1RL↑, C8B↑, C8A↑, CFH↑, and C5↑). We then undertook an unbiased plasma proteomic analysis of mice exposed to chronic social stress and observed dysregulation of 11 complement proteins, including three that were altered in the same direction in individuals with PE (C1R↑, CFH↑, and C5↑). Our findings indicate that dysregulation of the complement protein pathway in blood is associated with incidence of psychotic experiences and that these changes may reflect exposure to stress.
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Affiliation(s)
- Melanie Föcking
- Department of Psychiatry, Royal College of Surgeons in Ireland, Dublin, Ireland.
| | - Sophie Sabherwal
- Department of Psychiatry, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Hannah M Cates
- Friedman Brain Institute and Icahn School of Medicine at Mount Sinai, NY, New York, USA
| | - Caitriona Scaife
- School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin (UCD), Belfield, Dublin 4, Ireland
| | - Patrick Dicker
- Department of Epidemiology and Public Health, Royal College of Surgeons in Ireland, Dublin, Ireland
| | | | - Kieran Wynne
- School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin (UCD), Belfield, Dublin 4, Ireland
| | - Bart P F Rutten
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience, Maastricht University Medical Centre+, Maastricht, The Netherlands
| | | | - Mary Cannon
- Department of Psychiatry, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Eric J Nestler
- Friedman Brain Institute and Icahn School of Medicine at Mount Sinai, NY, New York, USA
| | - Meike Heurich
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Cardiff, UK
| | - Gerard Cagney
- School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin (UCD), Belfield, Dublin 4, Ireland
| | - Stanley Zammit
- MRC Centre for Neuropsychiatric Genetics and Genomics, Cardiff University, Cardiff, UK
- Centre for Academic Mental Health, Bristol Medical School, University of Bristol, Bristol, UK
| | - David R Cotter
- Department of Psychiatry, Royal College of Surgeons in Ireland, Dublin, Ireland.
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6
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Alinaghi S, Alehabib E, Johari AH, Vafaei F, Salehi S, Darvish H, Ghaedi H. Expression analysis and genotyping of DGKZ: a GWAS-derived risk gene for schizophrenia. Mol Biol Rep 2019; 46:4105-4111. [PMID: 31087244 DOI: 10.1007/s11033-019-04860-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2018] [Accepted: 05/06/2019] [Indexed: 11/30/2022]
Abstract
Schizophrenia (SCZ) is a disabling and severe mental illness characterized by abnormal social behavior and disrupted emotions. Similar to other neuropsychological disorders, both genetics and environmental factors interplay so as to develop SCZ. It is acknowledged that genes such as DGKZ are involved in lipid signaling pathways that are the basis of neural activities, memory, and learning and are considered as candidate loci for SCZ. The aim of the present study was to evaluate the expression level and genotypes of DGKZ in patients with SCZ and controls. We used q-PCR to measure the relative expression of DGKZ in blood. To determine DGKZ-rs7951870 genotypes, tetra-ARMS PCR was used. Our results showed a significant difference in DGKZ mRNA ratio between SCZ patients and healthy controls (P = 2 × 10-4). Also, we showed that rs7951870-TT genotype was strongly associated with increased DGKZ expression level (P = 0.038). In conclusion, our findings revealed dysregulation of DGKZ in SCZ patients and a significant correction between the gene expression and DGKZ variant rs7951870.
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Affiliation(s)
- Somayeh Alinaghi
- Department of Medical Genetics, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Elham Alehabib
- Student Research Committee, Department of Medical Genetics, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Amir Hossein Johari
- Department of Medical Genetics, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Fatemeh Vafaei
- The Cohort Lab for the Iran University of Medical Sciences Staffs, University of Medical Sciences, Tehran, Iran
| | - Shima Salehi
- The Cohort Lab for the Iran University of Medical Sciences Staffs, University of Medical Sciences, Tehran, Iran
| | - Hossein Darvish
- Cancer Research Center, Semnan University of Medical Sciences, Semnan, Iran. .,Department of Medical Genetics, School of Medicine, Semnan University of Medical Sciences, Semnan, Iran.
| | - Hamid Ghaedi
- Department of Medical Genetics, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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7
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Malashenkova IK, Krynskiy SA, Ogurtsov DP, Mamoshina MV, Zakharova NV, Ushakov VL, Velichkovsky BM, Didkovsky NA. [A role of the immune system in the pathogenesis of schizophrenia]. Zh Nevrol Psikhiatr Im S S Korsakova 2019; 118:72-80. [PMID: 30698566 DOI: 10.17116/jnevro201811812172] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The review addresses immunological aspects of schizophrenia, a multifactor disease caused by genetic factors, innate disorders of the central nervous system (CNS), including the consequences of perinatal hypoxia and infections, and adverse environmental influences. Neuroinflammation as a part of the pathophysiology of schizophrenia is characterized by the higher transcription of CNS inflammatory mediators, excessive activation of microglia, inhibition of glutamatergic receptors that leads to the decrease in the number of cortical synapses and neuronal apoptosis. The authors discuss a role of genetic polymorphisms of cytokine genes, complement system components etc. The literature data on the changes in systemic immune response and imbalance in Th1/Th2 adaptive immune responses are analyzed as well. Some papers showed higher levels of proinflammatory mediators in CSF and blood of patients with schizophrenia that indicated the involvement of blood brain barrier (BBB) dysfunction. The authors present the recent data on BBB dysfunction in schizophrenia and its role in the pathogenesis of the disease, autoimmunity in patients comparing it with immune activation and genetic predisposition. An important and arguable issues about a role of parasite and viral infections in the pathogenesis of schizophrenia, initiation of immune responses and direct impacts on the brain, an influence of antipsychotic treatment on immunity are discussed. In author's opinion, conflicting results of genetic and immunological studies of schizophrenia may be explained by different methodological approaches to selection of patients and healthy controls and the differences in schizophrenia classification.
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Affiliation(s)
- I K Malashenkova
- Research Center 'Kurchatov Institute', Moscow, Russia; Federal Research and Clinical Center of Physical-Chemical Medicine, Moscow
| | - S A Krynskiy
- Research Center 'Kurchatov Institute', Moscow, Russia; Federal Research and Clinical Center of Physical-Chemical Medicine, Moscow
| | - D P Ogurtsov
- Research Center 'Kurchatov Institute', Moscow, Russia; Federal Research and Clinical Center of Physical-Chemical Medicine, Moscow
| | - M V Mamoshina
- Research Center 'Kurchatov Institute', Moscow, Russia
| | - N V Zakharova
- Russia; Alekseev Psychiatric Clinical Hospital #1, Moscow, Russia ,Pirogov Russian National Research Medical University, Moscow, Russia
| | - V L Ushakov
- Research Center 'Kurchatov Institute', Moscow, Russia
| | | | - N A Didkovsky
- Federal Research and Clinical Center of Physical-Chemical Medicine, Moscow
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8
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Druart M, Le Magueresse C. Emerging Roles of Complement in Psychiatric Disorders. Front Psychiatry 2019; 10:573. [PMID: 31496960 PMCID: PMC6712161 DOI: 10.3389/fpsyt.2019.00573] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 07/22/2019] [Indexed: 12/12/2022] Open
Abstract
The complement system consists of more than 30 proteins that have long been known to participate to the immune defence against pathogens and to the removal of damaged cells. Their role, however, extends beyond immunity and clearance of altered "self" components in the periphery. In particular, complement proteins can be induced by all cell types in the brain. Recent discoveries highlight the role of complement in normal and pathological brain development. Specifically, the complement system mediates synaptic pruning, a developmental process whereby supernumerary synapses are eliminated in the immature brain. The complement system has been implicated in pathological synapse elimination in schizophrenia, West Nile virus infection, and lupus, all of which are associated with psychiatric manifestations. Complement also contributes to synapse loss in neurodegenerative conditions. This review provides a brief overview of the well-studied role of complement molecules in immunity. The contribution of complement to embryonic and adult neurogenesis, neuronal migration, and developmental synaptic elimination in the normal brain is reviewed. We discuss the role of complement in synapse loss in psychiatric and neurological diseases and evaluate the therapeutic potential of complement-targeting drugs for brain disorders.
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Affiliation(s)
- Mélanie Druart
- INSERM UMR-S 1270, Paris, France.,Science and Engineering Faculty, Sorbonne Université, Paris, France.,Institut du Fer à Moulin, Paris, France
| | - Corentin Le Magueresse
- INSERM UMR-S 1270, Paris, France.,Science and Engineering Faculty, Sorbonne Université, Paris, France.,Institut du Fer à Moulin, Paris, France
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9
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Upthegrove R, Abu-Akel A, Chisholm K, Lin A, Zahid S, Pelton M, Apperly I, Hansen PC, Wood SJ. Autism and psychosis: Clinical implications for depression and suicide. Schizophr Res 2018; 195:80-85. [PMID: 28823724 DOI: 10.1016/j.schres.2017.08.028] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2017] [Revised: 08/15/2017] [Accepted: 08/16/2017] [Indexed: 12/30/2022]
Abstract
There is increasing recognition of the co-occurrence of autism and schizophrenia spectrum disorders. However, the clinical significance of this on outcomes such as depression and suicidal thinking has not been explored. This study examines the association of autism spectrum traits, depressive symptoms and suicidal behaviour in individuals with psychotic experiences. In two cross sectional studies, individuals from a non-help seeking university student sample and patients with first episode psychosis (FEP) service completed standardized measures of autism spectrum traits, psychotic experiences, depressive symptoms and suicidal thinking. In healthy non-help seeking students, increased autism traits and increased subclinical psychotic experiences were significantly associated with depressive symptoms; a significant interaction effect suggests their combined presence has a greater impact on depression. In FEP, high autism traits and positive symptoms were associated with increased depression, hopelessness and suicidality, however there was no significant interaction effect. In FEP a multiple mediation model revealed that the relationship between autism traits and risk for suicidality was mediated through hopelessness. Young people with subclinical psychotic experiences and all patients with FEP should be screened for autism spectrum traits, which may have significant impact on clinical outcomes. Tailored interventions for patients with high levels of autistic spectrum co-morbidities in FEP should be a priority for future research.
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Affiliation(s)
- Rachel Upthegrove
- University of Birmingham, School of Psychology, Edgbaston, Birmingham B15 2TT, United Kingdom; University of Birmingham, Institute of Clinical Sciences, College of Medical and Dental Science, Edgbaston, Birmingham B15 2TT, United Kingdom; Forward Thinking Birmingham and Birmingham and Solihull Mental Health Foundation Trust, 1 Printing House Street, Birmingham B4 6DF, United Kingdom.
| | - Ahmad Abu-Akel
- University of Lausanne, Institute of Psychology, UNIL - Mouline, Géopolis - office 4129, CH-1015 Lausanne, Switzerland
| | - Katharine Chisholm
- University of Birmingham, School of Psychology, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Ashleigh Lin
- Telethon Kids Institute, The University of Western Australia, 100 Roberts Rd, Subiaco, WA 6008, Australia
| | - Sofia Zahid
- University of Birmingham, School of Psychology, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Mirabel Pelton
- University of Birmingham, School of Psychology, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Ian Apperly
- University of Birmingham, School of Psychology, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Peter C Hansen
- University of Birmingham, School of Psychology, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Stephen J Wood
- University of Birmingham, School of Psychology, Edgbaston, Birmingham B15 2TT, United Kingdom; University of Melbourne, Centre for Youth Mental Health, 35 Poplar Rd, Parkville, VIC 3052, Australia; Orygen, National Centre of Excellence in Youth Mental Health, 2a/2A Hartington Street, Glenroy, Victoria 3046, Australia
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10
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English JA, Lopez LM, O’Gorman A, Föcking M, Hryniewiecka M, Scaife C, Sabherwal S, Wynne K, Dicker P, Rutten BPF, Lewis G, Zammit S, Cannon M, Cagney G, Cotter DR. Blood-Based Protein Changes in Childhood Are Associated With Increased Risk for Later Psychotic Disorder: Evidence From a Nested Case-Control Study of the ALSPAC Longitudinal Birth Cohort. Schizophr Bull 2018; 44:297-306. [PMID: 29036721 PMCID: PMC5814944 DOI: 10.1093/schbul/sbx075] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The identification of early biological changes associated with the psychotic disorder (PD) is important as it may provide clues to the underlying pathophysiological mechanisms. We undertook the first proteomic profiling of blood plasma samples of children who later develop a PD. Participants were recruited from the UK Avon Longitudinal Study of Parents and Children (ALSPAC) cohort who also participated in psychiatric assessment interviews at age 18. Protein expression levels at age 11 were compared between individuals who developed PD at age 18 (n = 37) with population-based age-matched controls (n = 38). Sixty out of 181 plasma proteins profiled were found to be differentially expressed (P < .05) in children with an outcome of the PD. Thirty-four of these proteins were found to be differentially expressed following correction for multiple comparisons. Pathway analysis implicated the complement and coagulation cascade. A second, targeted proteomic approach was used to verify these findings in age 11 plasma from subjects who reported psychotic experiences at age 18 (n = 40) in comparison to age-matched controls (n = 66). Our findings indicate that the complement and coagulation system is dysregulated in the blood during childhood before the development of the PD.
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Affiliation(s)
- Jane A English
- Department of Psychiatry, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Lorna M Lopez
- Department of Psychiatry, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Aoife O’Gorman
- Department of Psychiatry, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Melanie Föcking
- Department of Psychiatry, Royal College of Surgeons in Ireland, Dublin, Ireland
| | | | - Caitriona Scaife
- School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin (UCD), Dublin, Ireland
| | - Sophie Sabherwal
- Department of Psychiatry, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Kieran Wynne
- School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin (UCD), Dublin, Ireland
| | - Patrick Dicker
- Department of Epidemiology and Public Health, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Bart P F Rutten
- Department of Psychiatry & Neuropsychology, School for Mental Health and Neuroscience, Division of Neuroscience, Maastricht University, Maastricht, The Netherlands
| | | | - Stanley Zammit
- MRC Centre for Neuropsychiatric Genetics & Genomics, Cardiff University, Cardiff, UK
- School of Social and Community Medicine, University of Bristol, Bristol, UK
| | - Mary Cannon
- Department of Psychiatry, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Gerard Cagney
- School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin (UCD), Dublin, Ireland
| | - David R Cotter
- Department of Psychiatry, Royal College of Surgeons in Ireland, Dublin, Ireland
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Brain Organoids: Expanding Our Understanding of Human Development and Disease. Results Probl Cell Differ 2018; 66:183-206. [PMID: 30209660 DOI: 10.1007/978-3-319-93485-3_8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Stem cell-derived brain organoids replicate important stages of the prenatal human brain development and combined with the induced pluripotent stem cell (iPSC) technology offer an unprecedented model for investigating human neurological diseases including autism and microcephaly. We describe the history and birth of organoids and their application, focusing on cerebral organoids derived from embryonic stem cells and iPSCs. We discuss new insights into organoid-based model of schizophrenia and shed light on challenges and future applications of organoid-based disease model system. This review also suggests hitherto unrevealed potential applications of organoids in combining with new technologies such as nanophotonics/optogenomics for controlling brain development and atomic force microscopy for studying mechanical forces that shape the developing brain.
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Rahimi S, Sayad A, Moslemi E, Ghafouri-Fard S, Taheri M. Blood assessment of the expression levels of matrix metalloproteinase 9 (MMP9) and its natural inhibitor, TIMP1 genes in Iranian schizophrenic patients. Metab Brain Dis 2017; 32:1537-1542. [PMID: 28578515 DOI: 10.1007/s11011-017-0043-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Accepted: 05/24/2017] [Indexed: 10/19/2022]
Abstract
Schizophrenia (SCZ) is the most severe chronic mental disorder characterized by abnormal social behavior and disrupted emotions and thought. Like other complex neuropsychological disease, SCZ is caused by a combination of genetic and environmental factors but with a high concordance rate. So far, different genetic factors are revealed to be associated with increased risk of developing SCZ. One of the best ways to investigate the genetic basis of the complex disease is to discover the genetic underlying mechanisms of the defective clinical aspects of the patients. In this regard, genes involved in the developmental mechanisms of the brain such as long-term potentiation (LTP) process that is the basis of synaptic plasticity, memory and learning are considered as strong candidates for SCZ. The aim of the present study was to evaluate the expression levels of two genes that are involved in the LTP regulation in the developing and adult brain, Matrix metallopeptidase9 (MMP9) and TIMP metallopeptidase inhibitor 1 (TIMP1) genes in a blood assessment of schizophrenic patients in comparison to healthy controls by means of quantitative real time PCR. The results of the study showed a significant difference in MMP9/TIPM1 ratio between SCZ patients and healthy controls (P = 0.01). However, no significant difference was detected in the expression level of individual MMP9 and TIMP1 genes in SCZ patients versus healthy controls either in total numbers of subject or in sex based subgroups. Considering the relatively small sample size of the current study, there is a need to replicate this study with further investigations about the mechanism of association of these genes and their functions in the pathogenesis of the SCZ.
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Affiliation(s)
- Shahrzad Rahimi
- Department of Biology, Central Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Arezou Sayad
- Department of Medical Genetics, School of Medicine, Shahid Beheshti University of Medical Sciences, PO Box 1985717443, Tehran, Iran.
| | - Elham Moslemi
- Department of Biology, Central Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Soudeh Ghafouri-Fard
- Department of Medical Genetics, School of Medicine, Shahid Beheshti University of Medical Sciences, PO Box 1985717443, Tehran, Iran
| | - Mohammad Taheri
- Department of Medical Genetics, School of Medicine, Shahid Beheshti University of Medical Sciences, PO Box 1985717443, Tehran, Iran.
- Urogenital Stem Cell Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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