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Gordillo-Sampedro S, Antounians L, Wei W, Mufteev M, Lendemeijer B, Kushner SA, de Vrij FMS, Zani A, Ellis J. iPSC-derived healthy human astrocytes selectively load miRNAs targeting neuronal genes into extracellular vesicles. Mol Cell Neurosci 2024; 129:103933. [PMID: 38663691 DOI: 10.1016/j.mcn.2024.103933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 03/31/2024] [Accepted: 04/20/2024] [Indexed: 05/05/2024] Open
Abstract
Astrocytes are in constant communication with neurons during the establishment and maturation of functional networks in the developing brain. Astrocytes release extracellular vesicles (EVs) containing microRNA (miRNA) cargo that regulates transcript stability in recipient cells. Astrocyte released factors are thought to be involved in neurodevelopmental disorders. Healthy astrocytes partially rescue Rett Syndrome (RTT) neuron function. EVs isolated from stem cell progeny also correct aspects of RTT. EVs cross the blood-brain barrier (BBB) and their cargo is found in peripheral blood which may allow non-invasive detection of EV cargo as biomarkers produced by healthy astrocytes. Here we characterize miRNA cargo and sequence motifs in healthy human astrocyte derived EVs (ADEVs). First, human induced Pluripotent Stem Cells (iPSC) were differentiated into Neural Progenitor Cells (NPCs) and subsequently into astrocytes using a rapid differentiation protocol. iPSC derived astrocytes expressed specific markers, displayed intracellular calcium transients and secreted ADEVs. miRNAs were identified by RNA-Seq on astrocytes and ADEVs and target gene pathway analysis detected brain and immune related terms. The miRNA profile was consistent with astrocyte identity, and included approximately 80 miRNAs found in astrocytes that were relatively depleted in ADEVs suggestive of passive loading. About 120 miRNAs were relatively enriched in ADEVs and motif analysis discovered binding sites for RNA binding proteins FUS, SRSF7 and CELF5. miR-483-5p was the most significantly enriched in ADEVs. This miRNA regulates MECP2 expression in neurons and has been found differentially expressed in blood samples from RTT patients. Our results identify potential miRNA biomarkers selectively sorted into ADEVs and implicate RNA binding protein sequence dependent mechanisms for miRNA cargo loading.
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Affiliation(s)
- Sara Gordillo-Sampedro
- Program in Developmental and Stem Cell Biology, Hospital for Sick Children, Toronto, ON, Canada; Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada
| | - Lina Antounians
- Program in Developmental and Stem Cell Biology, Hospital for Sick Children, Toronto, ON, Canada; Division of General and Thoracic Surgery, Hospital for Sick Children, Toronto, ON, Canada
| | - Wei Wei
- Program in Developmental and Stem Cell Biology, Hospital for Sick Children, Toronto, ON, Canada
| | - Marat Mufteev
- Program in Developmental and Stem Cell Biology, Hospital for Sick Children, Toronto, ON, Canada; Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada
| | - Bas Lendemeijer
- Department of Psychiatry, Erasmus University Medical Center, Rotterdam, The Netherlands; Department of Psychiatry, Columbia University Medical Center, New York, NY, USA
| | - Steven A Kushner
- Department of Psychiatry, Erasmus University Medical Center, Rotterdam, The Netherlands; Department of Psychiatry, Columbia University Medical Center, New York, NY, USA
| | - Femke M S de Vrij
- Department of Psychiatry, Erasmus University Medical Center, Rotterdam, The Netherlands; Center of Expertise for Neurodevelopmental Disorders (ENCORE), Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Augusto Zani
- Program in Developmental and Stem Cell Biology, Hospital for Sick Children, Toronto, ON, Canada; Division of General and Thoracic Surgery, Hospital for Sick Children, Toronto, ON, Canada; Department of Surgery, University of Toronto, Toronto, ON, Canada
| | - James Ellis
- Program in Developmental and Stem Cell Biology, Hospital for Sick Children, Toronto, ON, Canada; Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada.
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Bauer L, Rissmann M, Benavides FFW, Leijten L, van Run P, Begeman L, Veldhuis Kroeze EJB, Lendemeijer B, Smeenk H, de Vrij FMS, Kushner SA, Koopmans MPG, Rockx B, van Riel D. In vitro and in vivo differences in neurovirulence between D614G, Delta And Omicron BA.1 SARS-CoV-2 variants. Acta Neuropathol Commun 2022; 10:124. [PMID: 36058935 PMCID: PMC9441226 DOI: 10.1186/s40478-022-01426-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 08/09/2022] [Indexed: 01/16/2023] Open
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection is associated with various neurological complications. Although the mechanism is not fully understood, several studies have shown that neuroinflammation occurs in the acute and post-acute phase. As these studies have predominantly been performed with isolates from 2020, it is unknown if there are differences among SARS-CoV-2 variants in their ability to cause neuroinflammation. Here, we compared the neuroinvasiveness, neurotropism and neurovirulence of the SARS-CoV-2 ancestral strain D614G, the Delta (B.1.617.2) and Omicron BA.1 (B.1.1.529) variants using in vitro and in vivo models. The Omicron BA.1 variant showed reduced neurotropism and neurovirulence compared to Delta and D614G in human induced pluripotent stem cell (hiPSC)-derived cortical neurons co-cultured with astrocytes. Similar differences were obtained in Syrian hamsters inoculated with D614G, Delta and the Omicron BA.1 variant 5 days post infection. Replication in the olfactory mucosa was observed in all hamsters, but most prominently in D614G inoculated hamsters. Furthermore, neuroinvasion into the CNS via the olfactory nerve was observed in D614G, but not Delta or Omicron BA.1 inoculated hamsters. Furthermore, neuroinvasion was associated with neuroinflammation in the olfactory bulb of hamsters inoculated with D614G. Altogether, our findings suggest differences in the neuroinvasive, neurotropic and neurovirulent potential between SARS-CoV-2 variants using in vitro hiPSC-derived neural cultures and in vivo in hamsters during the acute phase of the infection.
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Affiliation(s)
- Lisa Bauer
- Department of Viroscience, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Melanie Rissmann
- Department of Viroscience, Erasmus Medical Center, Rotterdam, The Netherlands
| | | | - Lonneke Leijten
- Department of Viroscience, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Peter van Run
- Department of Viroscience, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Lineke Begeman
- Department of Viroscience, Erasmus Medical Center, Rotterdam, The Netherlands
| | | | - Bas Lendemeijer
- Department of Psychiatry, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Hilde Smeenk
- Department of Psychiatry, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Femke M S de Vrij
- Department of Psychiatry, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Steven A Kushner
- Department of Psychiatry, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Marion P G Koopmans
- Department of Viroscience, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Barry Rockx
- Department of Viroscience, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Debby van Riel
- Department of Viroscience, Erasmus Medical Center, Rotterdam, The Netherlands.
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3
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Zampeta FI, Sonzogni M, Niggl E, Lendemeijer B, Smeenk H, de Vrij FMS, Kushner SA, Distel B, Elgersma Y. Conserved UBE3A subcellular distribution between human and mice is facilitated by non-homologous isoforms. Hum Mol Genet 2020; 29:3032-3043. [PMID: 32879944 PMCID: PMC7645710 DOI: 10.1093/hmg/ddaa194] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 08/27/2020] [Accepted: 08/27/2020] [Indexed: 11/12/2022] Open
Abstract
The human UBE3A gene, which is essential for normal neurodevelopment, encodes three Ubiquitin E3 ligase A (UBE3A) protein isoforms. However, the subcellular localization and relative abundance of these human UBE3A isoforms are unknown. We found, as previously reported in mice, that UBE3A is predominantly nuclear in human neurons. However, this conserved subcellular distribution is achieved by strikingly distinct cis-acting mechanisms. A single amino-acid deletion in the N-terminus of human hUBE3A-Iso3, which is homologous to cytosolic mouse mUBE3A-Iso2, results in its translocation to the nucleus. This singe amino-acid deletion is shared with apes and Old World monkeys and was preceded by the appearance of the cytosolic hUBE3A-Iso2 isoform. This hUBE3A-Iso2 isoform arose after the lineage of New World monkeys and Old World monkeys separated from the Tarsiers (Tarsiidae). Due to the loss of a single nucleotide in a non-coding exon, this exon became in frame with the remainder of the UBE3A protein. RNA-seq analysis of human brain samples showed that the human UBE3A isoforms arise by alternative splicing. Consistent with the predominant nuclear enrichment of UBE3A in human neurons, the two nuclear-localized isoforms, hUBE3A-Iso1 and -Iso3, are the most abundantly expressed isoforms of UBE3A, while hUBE3A-Iso2 maintains a small pool of cytosolic UBE3A. Our findings provide new insight into UBE3A localization and evolution and may have important implications for gene therapy approaches in Angelman syndrome.
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Affiliation(s)
- F Isabella Zampeta
- Department of Neuroscience, Erasmus University Medical Center, 3015 GD Rotterdam, The Netherlands
- ENCORE Expertise Center for Neurodevelopmental Disorders, Erasmus University Medical Center, 3015 GD Rotterdam, The Netherlands
| | - Monica Sonzogni
- Department of Neuroscience, Erasmus University Medical Center, 3015 GD Rotterdam, The Netherlands
- ENCORE Expertise Center for Neurodevelopmental Disorders, Erasmus University Medical Center, 3015 GD Rotterdam, The Netherlands
| | - Eva Niggl
- Department of Neuroscience, Erasmus University Medical Center, 3015 GD Rotterdam, The Netherlands
- ENCORE Expertise Center for Neurodevelopmental Disorders, Erasmus University Medical Center, 3015 GD Rotterdam, The Netherlands
| | - Bas Lendemeijer
- Department of Psychiatry, Erasmus University Medical Center, 3015 GD Rotterdam, The Netherlands
| | - Hilde Smeenk
- Department of Psychiatry, Erasmus University Medical Center, 3015 GD Rotterdam, The Netherlands
| | - Femke M S de Vrij
- Department of Psychiatry, Erasmus University Medical Center, 3015 GD Rotterdam, The Netherlands
| | - Steven A Kushner
- ENCORE Expertise Center for Neurodevelopmental Disorders, Erasmus University Medical Center, 3015 GD Rotterdam, The Netherlands
- Department of Psychiatry, Erasmus University Medical Center, 3015 GD Rotterdam, The Netherlands
| | - Ben Distel
- Department of Neuroscience, Erasmus University Medical Center, 3015 GD Rotterdam, The Netherlands
- ENCORE Expertise Center for Neurodevelopmental Disorders, Erasmus University Medical Center, 3015 GD Rotterdam, The Netherlands
- Department of Medical Biochemistry, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Ype Elgersma
- Department of Neuroscience, Erasmus University Medical Center, 3015 GD Rotterdam, The Netherlands
- ENCORE Expertise Center for Neurodevelopmental Disorders, Erasmus University Medical Center, 3015 GD Rotterdam, The Netherlands
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4
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Xiong Z, Dankova G, Howe LJ, Lee MK, Hysi PG, de Jong MA, Zhu G, Adhikari K, Li D, Li Y, Pan B, Feingold E, Marazita ML, Shaffer JR, McAloney K, Xu SH, Jin L, Wang S, de Vrij FMS, Lendemeijer B, Richmond S, Zhurov A, Lewis S, Sharp GC, Paternoster L, Thompson H, Gonzalez-Jose R, Bortolini MC, Canizales-Quinteros S, Gallo C, Poletti G, Bedoya G, Rothhammer F, Uitterlinden AG, Ikram MA, Wolvius E, Kushner SA, Nijsten TEC, Palstra RJTS, Boehringer S, Medland SE, Tang K, Ruiz-Linares A, Martin NG, Spector TD, Stergiakouli E, Weinberg SM, Liu F, Kayser M. Novel genetic loci affecting facial shape variation in humans. eLife 2019; 8:e49898. [PMID: 31763980 PMCID: PMC6905649 DOI: 10.7554/elife.49898] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Accepted: 11/22/2019] [Indexed: 12/14/2022] Open
Abstract
The human face represents a combined set of highly heritable phenotypes, but knowledge on its genetic architecture remains limited, despite the relevance for various fields. A series of genome-wide association studies on 78 facial shape phenotypes quantified from 3-dimensional facial images of 10,115 Europeans identified 24 genetic loci reaching study-wide suggestive association (p < 5 × 10-8), among which 17 were previously unreported. A follow-up multi-ethnic study in additional 7917 individuals confirmed 10 loci including six unreported ones (padjusted < 2.1 × 10-3). A global map of derived polygenic face scores assembled facial features in major continental groups consistent with anthropological knowledge. Analyses of epigenomic datasets from cranial neural crest cells revealed abundant cis-regulatory activities at the face-associated genetic loci. Luciferase reporter assays in neural crest progenitor cells highlighted enhancer activities of several face-associated DNA variants. These results substantially advance our understanding of the genetic basis underlying human facial variation and provide candidates for future in-vivo functional studies.
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Affiliation(s)
- Ziyi Xiong
- Department of Genetic IdentificationErasmus MC University Medical Center RotterdamRotterdamNetherlands
- Department of EpidemiologyErasmus MC University Medical Center RotterdamRotterdamNetherlands
- CAS Key Laboratory of Genomic and Precision Medicine, Beijing Institute of GenomicsUniversity of Chinese Academy of Sciences (CAS)BeijingChina
| | - Gabriela Dankova
- Department of Genetic IdentificationErasmus MC University Medical Center RotterdamRotterdamNetherlands
| | - Laurence J Howe
- Medical Research Council Integrative Epidemiology Unit, Population Health SciencesUniversity of BristolBristolUnited Kingdom
| | - Myoung Keun Lee
- Center for Craniofacial and Dental Genetics, Department of Oral BiologyUniversity of PittsburghPittsburghUnited States
| | - Pirro G Hysi
- Department of Twin Research and Genetic EpidemiologyKing’s College LondonLondonUnited Kingdom
| | - Markus A de Jong
- Department of Genetic IdentificationErasmus MC University Medical Center RotterdamRotterdamNetherlands
- Department of Oral & Maxillofacial Surgery, Special Dental Care, and OrthodonticsErasmus MC University Medical Center RotterdamRotterdamNetherlands
- Department of Biomedical Data SciencesLeiden University Medical CenterLeidenNetherlands
| | - Gu Zhu
- QIMR Berghofer Medical Research InstituteBrisbaneAustralia
| | - Kaustubh Adhikari
- Department of Genetics, Evolution, and EnvironmentUniversity College LondonLondonUnited Kingdom
| | - Dan Li
- CAS Key Laboratory of Computational BiologyChinese Academy of Sciences (CAS)ShanghaiChina
- CAS-MPG Partner Institute for Computational Biology (PICB)Chinese Academy of Sciences (CAS)ShanghaiChina
- Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological SciencesChinese Academy of Sciences (CAS)ShanghaiChina
| | - Yi Li
- CAS Key Laboratory of Genomic and Precision Medicine, Beijing Institute of GenomicsUniversity of Chinese Academy of Sciences (CAS)BeijingChina
| | - Bo Pan
- Department of Auricular ReconstructionPlastic Surgery HospitalBeijingChina
| | - Eleanor Feingold
- Center for Craniofacial and Dental Genetics, Department of Oral BiologyUniversity of PittsburghPittsburghUnited States
| | - Mary L Marazita
- Center for Craniofacial and Dental Genetics, Department of Oral BiologyUniversity of PittsburghPittsburghUnited States
- Department of Human GeneticsUniversity of PittsburghPittsburghUnited States
| | - John R Shaffer
- Center for Craniofacial and Dental Genetics, Department of Oral BiologyUniversity of PittsburghPittsburghUnited States
- Department of Human GeneticsUniversity of PittsburghPittsburghUnited States
| | | | - Shu-Hua Xu
- CAS Key Laboratory of Computational BiologyChinese Academy of Sciences (CAS)ShanghaiChina
- CAS-MPG Partner Institute for Computational Biology (PICB)Chinese Academy of Sciences (CAS)ShanghaiChina
- Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological SciencesChinese Academy of Sciences (CAS)ShanghaiChina
- School of Life Science and TechnologyShanghaiTech UniversityShanghaiChina
- Center for Excellence in Animal Evolution and GeneticsChinese Academy of SciencesKunmingChina
| | - Li Jin
- CAS Key Laboratory of Computational BiologyChinese Academy of Sciences (CAS)ShanghaiChina
- CAS-MPG Partner Institute for Computational Biology (PICB)Chinese Academy of Sciences (CAS)ShanghaiChina
- Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological SciencesChinese Academy of Sciences (CAS)ShanghaiChina
- State Key Laboratory of Genetic Engineering, School of Life SciencesFudan UniversityShanghaiChina
- Ministry of Education Key Laboratory of Contemporary Anthropology, School of Life SciencesFudan UniversityShanghaiChina
| | - Sijia Wang
- CAS Key Laboratory of Computational BiologyChinese Academy of Sciences (CAS)ShanghaiChina
- CAS-MPG Partner Institute for Computational Biology (PICB)Chinese Academy of Sciences (CAS)ShanghaiChina
- Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological SciencesChinese Academy of Sciences (CAS)ShanghaiChina
- Center for Excellence in Animal Evolution and GeneticsChinese Academy of SciencesKunmingChina
| | - Femke MS de Vrij
- Department of PsychiatryErasmus MC University Medical Center RotterdamRotterdamNetherlands
| | - Bas Lendemeijer
- Department of PsychiatryErasmus MC University Medical Center RotterdamRotterdamNetherlands
| | - Stephen Richmond
- Applied Clinical Research and Public Health, University Dental SchoolCardiff UniversityCardiffUnited Kingdom
| | - Alexei Zhurov
- Applied Clinical Research and Public Health, University Dental SchoolCardiff UniversityCardiffUnited Kingdom
| | - Sarah Lewis
- Medical Research Council Integrative Epidemiology Unit, Population Health SciencesUniversity of BristolBristolUnited Kingdom
| | - Gemma C Sharp
- Medical Research Council Integrative Epidemiology Unit, Population Health SciencesUniversity of BristolBristolUnited Kingdom
- School of Oral and Dental SciencesUniversity of BristolBristolUnited Kingdom
| | - Lavinia Paternoster
- Medical Research Council Integrative Epidemiology Unit, Population Health SciencesUniversity of BristolBristolUnited Kingdom
| | - Holly Thompson
- Medical Research Council Integrative Epidemiology Unit, Population Health SciencesUniversity of BristolBristolUnited Kingdom
| | - Rolando Gonzalez-Jose
- Instituto Patagonico de Ciencias Sociales y Humanas, CENPAT-CONICETPuerto MadrynArgentina
| | | | - Samuel Canizales-Quinteros
- UNAM-Instituto Nacional de Medicina Genomica, Facultad de QuımicaUnidad de Genomica de Poblaciones Aplicada a la SaludMexico CityMexico
| | - Carla Gallo
- Laboratorios de Investigacion y Desarrollo, Facultad de Ciencias y FilosofıaUniversidad Peruana Cayetano HerediaLimaPeru
| | - Giovanni Poletti
- Laboratorios de Investigacion y Desarrollo, Facultad de Ciencias y FilosofıaUniversidad Peruana Cayetano HerediaLimaPeru
| | - Gabriel Bedoya
- GENMOL (Genetica Molecular)Universidad de AntioquiaMedellınColombia
| | | | - André G Uitterlinden
- Department of EpidemiologyErasmus MC University Medical Center RotterdamRotterdamNetherlands
- Department of Internal MedicineErasmus MC University Medical Center RotterdamRotterdamNetherlands
| | - M Arfan Ikram
- Department of EpidemiologyErasmus MC University Medical Center RotterdamRotterdamNetherlands
| | - Eppo Wolvius
- Department of Oral & Maxillofacial Surgery, Special Dental Care, and OrthodonticsErasmus MC University Medical Center RotterdamRotterdamNetherlands
| | - Steven A Kushner
- Department of PsychiatryErasmus MC University Medical Center RotterdamRotterdamNetherlands
| | - Tamar EC Nijsten
- Department of DermatologyErasmus MC University Medical Center RotterdamRotterdamNetherlands
| | - Robert-Jan TS Palstra
- Department of BiochemistryErasmus MC University Medical Center RotterdamRotterdamNetherlands
| | - Stefan Boehringer
- Department of Biomedical Data SciencesLeiden University Medical CenterLeidenNetherlands
| | | | - Kun Tang
- CAS Key Laboratory of Computational BiologyChinese Academy of Sciences (CAS)ShanghaiChina
- CAS-MPG Partner Institute for Computational Biology (PICB)Chinese Academy of Sciences (CAS)ShanghaiChina
- Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological SciencesChinese Academy of Sciences (CAS)ShanghaiChina
| | - Andres Ruiz-Linares
- State Key Laboratory of Genetic Engineering, School of Life SciencesFudan UniversityShanghaiChina
- Ministry of Education Key Laboratory of Contemporary Anthropology, School of Life SciencesFudan UniversityShanghaiChina
- Aix-Marseille Université, CNRS, EFS, ADESMarseilleFrance
| | | | - Timothy D Spector
- Department of Twin Research and Genetic EpidemiologyKing’s College LondonLondonUnited Kingdom
| | - Evie Stergiakouli
- Medical Research Council Integrative Epidemiology Unit, Population Health SciencesUniversity of BristolBristolUnited Kingdom
- School of Oral and Dental SciencesUniversity of BristolBristolUnited Kingdom
| | - Seth M Weinberg
- Center for Craniofacial and Dental Genetics, Department of Oral BiologyUniversity of PittsburghPittsburghUnited States
- Department of Human GeneticsUniversity of PittsburghPittsburghUnited States
- Department of AnthropologyUniversity of PittsburghPittsburghUnited States
| | - Fan Liu
- Department of Genetic IdentificationErasmus MC University Medical Center RotterdamRotterdamNetherlands
- CAS Key Laboratory of Genomic and Precision Medicine, Beijing Institute of GenomicsUniversity of Chinese Academy of Sciences (CAS)BeijingChina
| | - Manfred Kayser
- Department of Genetic IdentificationErasmus MC University Medical Center RotterdamRotterdamNetherlands
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5
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Ghanbari M, Munshi ST, Ma B, Lendemeijer B, Bansal S, Adams HH, Wang W, Goth K, Slump DE, den Hout MC, IJcken WF, Bellusci S, Pan Q, Erkeland SJ, Vrij FM, Kushner SA, Ikram MA. A functional variant in the miR‐142 promoter modulating its expression and conferring risk of Alzheimer disease. Hum Mutat 2019; 40:2131-2145. [DOI: 10.1002/humu.23872] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 06/13/2019] [Accepted: 07/11/2019] [Indexed: 12/16/2022]
Affiliation(s)
- Mohsen Ghanbari
- Department of Epidemiology, Erasmus MC University Medical Center Rotterdam Rotterdam the Netherlands
- Department of Genetics, School of Medicine Mashhad University of Medical Sciences Mashhad Iran
| | - Shashini T. Munshi
- Department of Psychiatry, Erasmus MC University Medical Center Rotterdam Rotterdam the Netherlands
| | - Buyun Ma
- Department of Gastroenterology, Erasmus MC University Medical Center Rotterdam Rotterdam the Netherlands
| | - Bas Lendemeijer
- Department of Psychiatry, Erasmus MC University Medical Center Rotterdam Rotterdam the Netherlands
| | - Sakshi Bansal
- Department of Psychiatry, Erasmus MC University Medical Center Rotterdam Rotterdam the Netherlands
| | - Hieab H. Adams
- Department of Epidemiology, Erasmus MC University Medical Center Rotterdam Rotterdam the Netherlands
- Department of Clinical Genetics, Erasmus MC University Medical Center Rotterdam Rotterdam the Netherlands
- Department of Radiology and Nuclear Medicine, Erasmus MC University Medical Center Rotterdam Rotterdam the Netherlands
| | - Wenshi Wang
- Department of Gastroenterology, Erasmus MC University Medical Center Rotterdam Rotterdam the Netherlands
| | - Kerstin Goth
- Department of Lung Matrix Remodeling, Excellence Cluster Cardio‐Pulmonary System (ECCPS) University Justus Liebig Giessen Giessen Germany
| | - Denise E. Slump
- Department of Psychiatry, Erasmus MC University Medical Center Rotterdam Rotterdam the Netherlands
| | - Mirjam C.G.N. den Hout
- Center for Biomics, Department of Cell Biology, Erasmus MC University Medical Center Rotterdam Rotterdam the Netherlands
| | - Wilfred F.J. IJcken
- Center for Biomics, Department of Cell Biology, Erasmus MC University Medical Center Rotterdam Rotterdam the Netherlands
| | - Saverio Bellusci
- Department of Lung Matrix Remodeling, Excellence Cluster Cardio‐Pulmonary System (ECCPS) University Justus Liebig Giessen Giessen Germany
| | - Qiuwei Pan
- Department of Gastroenterology, Erasmus MC University Medical Center Rotterdam Rotterdam the Netherlands
| | - Stefan J. Erkeland
- Department of Immunology, Erasmus MC University Medical Center Rotterdam Rotterdam the Netherlands
| | - Femke M.S. Vrij
- Department of Psychiatry, Erasmus MC University Medical Center Rotterdam Rotterdam the Netherlands
| | - Steven A. Kushner
- Department of Psychiatry, Erasmus MC University Medical Center Rotterdam Rotterdam the Netherlands
| | - M. Arfan Ikram
- Department of Epidemiology, Erasmus MC University Medical Center Rotterdam Rotterdam the Netherlands
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6
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de Vrij FM, Bouwkamp CG, Gunhanlar N, Shpak G, Lendemeijer B, Baghdadi M, Gopalakrishna S, Ghazvini M, Li TM, Quadri M, Olgiati S, Breedveld GJ, Coesmans M, Mientjes E, de Wit T, Verheijen FW, Beverloo HB, Cohen D, Kok RM, Bakker PR, Nijburg A, Spijker AT, Haffmans PMJ, Hoencamp E, Bergink V, Vorstman JA, Wu T, Olde Loohuis LM, Amin N, Langen CD, Hofman A, Hoogendijk WJ, van Duijn CM, Ikram MA, Vernooij MW, Tiemeier H, Uitterlinden AG, Elgersma Y, Distel B, Gribnau J, White T, Bonifati V, Kushner SA. Candidate CSPG4 mutations and induced pluripotent stem cell modeling implicate oligodendrocyte progenitor cell dysfunction in familial schizophrenia. Mol Psychiatry 2019; 24:757-771. [PMID: 29302076 PMCID: PMC6755981 DOI: 10.1038/s41380-017-0004-2] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 09/24/2017] [Accepted: 11/01/2017] [Indexed: 01/09/2023]
Abstract
Schizophrenia is highly heritable, yet its underlying pathophysiology remains largely unknown. Among the most well-replicated findings in neurobiological studies of schizophrenia are deficits in myelination and white matter integrity; however, direct etiological genetic and cellular evidence has thus far been lacking. Here, we implement a family-based approach for genetic discovery in schizophrenia combined with functional analysis using induced pluripotent stem cells (iPSCs). We observed familial segregation of two rare missense mutations in Chondroitin Sulfate Proteoglycan 4 (CSPG4) (c.391G > A [p.A131T], MAF 7.79 × 10-5 and c.2702T > G [p.V901G], MAF 2.51 × 10-3). The CSPG4A131T mutation was absent from the Swedish Schizophrenia Exome Sequencing Study (2536 cases, 2543 controls), while the CSPG4V901G mutation was nominally enriched in cases (11 cases vs. 3 controls, P = 0.026, OR 3.77, 95% CI 1.05-13.52). CSPG4/NG2 is a hallmark protein of oligodendrocyte progenitor cells (OPCs). iPSC-derived OPCs from CSPG4A131T mutation carriers exhibited abnormal post-translational processing (P = 0.029), subcellular localization of mutant NG2 (P = 0.007), as well as aberrant cellular morphology (P = 3.0 × 10-8), viability (P = 8.9 × 10-7), and myelination potential (P = 0.038). Moreover, transfection of healthy non-carrier sibling OPCs confirmed a pathogenic effect on cell survival of both the CSPG4A131T (P = 0.006) and CSPG4V901G (P = 3.4 × 10-4) mutations. Finally, in vivo diffusion tensor imaging of CSPG4A131T mutation carriers demonstrated a reduction of brain white matter integrity compared to unaffected sibling and matched general population controls (P = 2.2 × 10-5). Together, our findings provide a convergence of genetic and functional evidence to implicate OPC dysfunction as a candidate pathophysiological mechanism of familial schizophrenia.
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Affiliation(s)
- Femke M de Vrij
- Department of Psychiatry, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Christian G Bouwkamp
- Department of Psychiatry, Erasmus Medical Center, Rotterdam, The Netherlands
- Department of Clinical Genetics, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Nilhan Gunhanlar
- Department of Psychiatry, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Guy Shpak
- Department of Psychiatry, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Bas Lendemeijer
- Department of Psychiatry, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Maarouf Baghdadi
- Department of Psychiatry, Erasmus Medical Center, Rotterdam, The Netherlands
| | | | - Mehrnaz Ghazvini
- Department of Developmental Biology, and Erasmus MC iPS Facility, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Tracy M Li
- Department of Developmental Biology, and Erasmus MC iPS Facility, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Marialuisa Quadri
- Department of Clinical Genetics, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Simone Olgiati
- Department of Clinical Genetics, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Guido J Breedveld
- Department of Clinical Genetics, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Michiel Coesmans
- Department of Psychiatry, Erasmus Medical Center, Rotterdam, The Netherlands
- Delta Psychiatric Center, Poortugaal, The Netherlands
| | - Edwin Mientjes
- Department of Neuroscience, Erasmus Medical Center, Rotterdam, The Netherlands
- ENCORE Expertise Center for Neurodevelopmental Disorders, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Ton de Wit
- Department of Clinical Genetics, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Frans W Verheijen
- Department of Clinical Genetics, Erasmus Medical Center, Rotterdam, The Netherlands
| | - H Berna Beverloo
- Department of Clinical Genetics, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Dan Cohen
- Mental Health Care Organization North-Holland North, Heerhugowaard, The Netherlands
| | - Rob M Kok
- Parnassia Psychiatric Institute, The Hague, The Netherlands
| | - P Roberto Bakker
- Department of Psychiatry and Psychology, School of Mental Health and Neuroscience, Maastricht University Medical Center, Maastricht, The Netherlands
- Psychiatric Center GGZ Centraal, Amersfoort, The Netherlands
| | - Aviva Nijburg
- Parnassia Psychiatric Institute, The Hague, The Netherlands
| | | | - P M Judith Haffmans
- Faculty of Social and Behavioral Sciences Clinical, Health and Neuro Psychology, Department of Affective Disorders, PsyQ, Leiden University, Leiden, The Netherlands
| | - Erik Hoencamp
- Parnassia Psychiatric Institute, The Hague, The Netherlands
- Institute of Psychology, Leiden University, Leiden, The Netherlands
| | - Veerle Bergink
- Department of Psychiatry, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Jacob A Vorstman
- Department of Psychiatry, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, The Netherlands
- Department of Psychiatry, The Hospital for Sick Children and University of Toronto, Toronto, Ontario, Canada
- Program in Genetics and Genome Biology, Research Institute, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Timothy Wu
- Center for Neurobehavioral Genetics, Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, CA, USA
| | - Loes M Olde Loohuis
- Center for Neurobehavioral Genetics, Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, CA, USA
| | - Najaf Amin
- Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Carolyn D Langen
- Department of Radiology, Erasmus Medical Center, Rotterdam, The Netherlands
- Department of Medical Informatics, Erasmus Medical Center, Rotterdam, The Netherlands
- Biomedical Imaging Group Rotterdam, Departments of Radiology & Medical Informatics, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Albert Hofman
- Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Witte J Hoogendijk
- Department of Psychiatry, Erasmus Medical Center, Rotterdam, The Netherlands
| | | | - M Arfan Ikram
- Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
- Department of Radiology, Erasmus Medical Center, Rotterdam, The Netherlands
- Department of Neurology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Meike W Vernooij
- Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
- Department of Radiology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Henning Tiemeier
- Department of Psychiatry, Erasmus Medical Center, Rotterdam, The Netherlands
- Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
- Department of Medical Informatics, Erasmus Medical Center, Rotterdam, The Netherlands
| | - André G Uitterlinden
- Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
- Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Ype Elgersma
- Department of Neuroscience, Erasmus Medical Center, Rotterdam, The Netherlands
- ENCORE Expertise Center for Neurodevelopmental Disorders, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Ben Distel
- Department of Medical Biochemistry, Academic Medical Centre, Amsterdam, The Netherlands
| | - Joost Gribnau
- Department of Developmental Biology, and Erasmus MC iPS Facility, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Tonya White
- Department of Medical Informatics, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Vincenzo Bonifati
- Department of Clinical Genetics, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Steven A Kushner
- Department of Psychiatry, Erasmus Medical Center, Rotterdam, The Netherlands.
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7
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García-León JA, Kumar M, Boon R, Chau D, One J, Wolfs E, Eggermont K, Berckmans P, Gunhanlar N, de Vrij F, Lendemeijer B, Pavie B, Corthout N, Kushner SA, Dávila JC, Lambrichts I, Hu WS, Verfaillie CM. SOX10 Single Transcription Factor-Based Fast and Efficient Generation of Oligodendrocytes from Human Pluripotent Stem Cells. Stem Cell Reports 2018; 10:655-672. [PMID: 29337119 PMCID: PMC5830935 DOI: 10.1016/j.stemcr.2017.12.014] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 12/15/2017] [Accepted: 12/15/2017] [Indexed: 02/06/2023] Open
Abstract
Scarce access to primary samples and lack of efficient protocols to generate oligodendrocytes (OLs) from human pluripotent stem cells (hPSCs) are hampering our understanding of OL biology and the development of novel therapies. Here, we demonstrate that overexpression of the transcription factor SOX10 is sufficient to generate surface antigen O4-positive (O4+) and myelin basic protein-positive OLs from hPSCs in only 22 days, including from patients with multiple sclerosis or amyotrophic lateral sclerosis. The SOX10-induced O4+ population resembles primary human OLs at the transcriptome level and can myelinate neurons in vivo. Using in vitro OL-neuron co-cultures, myelination of neurons by OLs can also be demonstrated, which can be adapted to a high-throughput screening format to test the response of pro-myelinating drugs. In conclusion, we provide an approach to generate OLs in a very rapid and efficient manner, which can be used for disease modeling, drug discovery efforts, and potentially for therapeutic OL transplantation. SOX10 is sufficient to generate myelinating human OLs from hPSCs in only 22 days SOX10-induced OLs resemble primary human OLs at the transcriptome level The methodology allows efficient generation of OLs from MS and ALS patients OL-neuron co-cultures respond to myelinating drugs in a high-throughput setting
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Affiliation(s)
- Juan Antonio García-León
- Department of Development and Regeneration, Stem Cell Biology and Embryology, KU Leuven Stem Cell Institute, Herestraat 49, Onderwijs en Navorsing 4, Box 804, 3000 Leuven, Belgium.
| | - Manoj Kumar
- Department of Development and Regeneration, Stem Cell Biology and Embryology, KU Leuven Stem Cell Institute, Herestraat 49, Onderwijs en Navorsing 4, Box 804, 3000 Leuven, Belgium
| | - Ruben Boon
- Department of Development and Regeneration, Stem Cell Biology and Embryology, KU Leuven Stem Cell Institute, Herestraat 49, Onderwijs en Navorsing 4, Box 804, 3000 Leuven, Belgium
| | - David Chau
- Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue Southeast, Minneapolis, MN 55455, USA
| | - Jennifer One
- Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue Southeast, Minneapolis, MN 55455, USA
| | - Esther Wolfs
- Laboratory of Morphology, Biomedical Research Institute (BIOMED), Hasselt University, Agoralaan, Building C, 3590 Diepenbeek, Belgium
| | - Kristel Eggermont
- Department of Development and Regeneration, Stem Cell Biology and Embryology, KU Leuven Stem Cell Institute, Herestraat 49, Onderwijs en Navorsing 4, Box 804, 3000 Leuven, Belgium
| | - Pieter Berckmans
- Department of Development and Regeneration, Stem Cell Biology and Embryology, KU Leuven Stem Cell Institute, Herestraat 49, Onderwijs en Navorsing 4, Box 804, 3000 Leuven, Belgium
| | - Nilhan Gunhanlar
- Department of Psychiatry, Erasmus MC, 3015 CE Rotterdam, the Netherlands
| | - Femke de Vrij
- Department of Psychiatry, Erasmus MC, 3015 CE Rotterdam, the Netherlands
| | - Bas Lendemeijer
- Department of Psychiatry, Erasmus MC, 3015 CE Rotterdam, the Netherlands
| | - Benjamin Pavie
- VIB Center for Brain and Disease Research, VIB-Leuven, 3000 Leuven, Belgium; VIB Bio Imaging Core, KU Leuven, Herestraat 49, 3000 Leuven, Belgium
| | - Nikky Corthout
- VIB Center for Brain and Disease Research, VIB-Leuven, 3000 Leuven, Belgium; VIB Bio Imaging Core, KU Leuven, Herestraat 49, 3000 Leuven, Belgium
| | - Steven A Kushner
- Department of Psychiatry, Erasmus MC, 3015 CE Rotterdam, the Netherlands
| | - José Carlos Dávila
- Department of Cell Biology, Genetics and Physiology, Faculty of Sciences, Research Biomedical Institute of Málaga (IBIMA), University of Málaga, Campus de Teatinos s/n, 29010 Málaga, Spain; Center for Networked Biomedical Research on Neurodegenerative Diseases (CIBERNED), Madrid, Spain
| | - Ivo Lambrichts
- Laboratory of Morphology, Biomedical Research Institute (BIOMED), Hasselt University, Agoralaan, Building C, 3590 Diepenbeek, Belgium
| | - Wei-Shou Hu
- Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue Southeast, Minneapolis, MN 55455, USA
| | - Catherine M Verfaillie
- Department of Development and Regeneration, Stem Cell Biology and Embryology, KU Leuven Stem Cell Institute, Herestraat 49, Onderwijs en Navorsing 4, Box 804, 3000 Leuven, Belgium.
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8
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Mulder CL, Uitenbroek D, Broer J, Lendemeijer B, van Veldhuizen JR, van Tilburg W, Lelliott P, Wierdsma AI. Changing patterns in emergency involuntary admissions in the Netherlands in the period 2000-2004. Int J Law Psychiatry 2008; 31:331-336. [PMID: 18667238 DOI: 10.1016/j.ijlp.2008.06.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
BACKGROUND In England, rates of involuntary admissions increased in subgroups of patients. It is unknown whether this is true in other European countries. AIMS To establish whether the increase in emergency commitments was uniform across subgroups of patients and dangerousness criteria used to justify commitment in The Netherlands. METHOD National data on all commitments in the period 2000-2004. RESULTS Commitments increased from 40.2 to 46.5 (16%) per 100,000 inhabitants. Controlling for population changes in age and sex, relatively large increases were found in patients over 50 years (25-40% increase), in patients with dementia (59%), 'other organic mental disorders' (40%) and substance abuse (36%). 'Arousing aggression', increased most strongly as a dangerousness criterion for commitment (30%). CONCLUSION Changing patterns of commitments in The Netherlands and England might indicate a wider European shift in diagnoses and reasons for admission of committed patients.
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Affiliation(s)
- C L Mulder
- Erasmus MC, University Medical Center Rotterdam, Department of Psychiatry and BavoEuropoort, Rotterdam, The Netherlands.
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9
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Lendemeijer B, Shortridge-Baggett L. The use of seclusion in psychiatry: a literature review. Res Theory Nurs Pract 1998; 11:299-315; discussion 317-20. [PMID: 9564234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
This article reports on a literature review of the practice of seclusion in psychiatric inpatient facilities. Attention is paid to the moral debate on seclusion. Most publications consider seclusion as a necessary intervention to manage problem behavior. The first part of the article deals with definitional aspects leading toward concept clarification. The review shows differences in definitional aspects, motives for seclusion, hospital characteristics, and patient characteristics. Data on frequency, incidence, and duration appear to be widely divergent. The experiences of patients who have been secluded are mostly negative, but positive reactions are also reported. In the publications of the last decade, there is emphasis on the contribution of hospital characteristics to trends in use of seclusion. Finally, it is concluded that seclusion is an effective way to manage (potentially) dangerous behavior and that seclusion is an intervention that may create therapeutic possibilities for care.
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Affiliation(s)
- B Lendemeijer
- University Hospital Utrecht, Department of Psychiatry, Utrecht, The Netherlands
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10
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Lendemeijer B. [Utilization of seclusion. Motives and reasons of nurses]. Verpleegkunde 1997; 12:217-26. [PMID: 9469127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Seclusion is one of several possible interventions with which patients and health care professionals can be confronted on units for admission and crisis intervention in mental health care institutions. The way in which psychiatric nurses shape their practice with regard to seclusion and how they experience this intervention is unclear. The goal of this study is to describe this practice. The results render insight in the motives and reasons of nurses for use of seclusion, the content of the term emergency situation, the way in which decisions to seclude are taken and which interventions can be labelled as preventive. Finally conclusions are given and the questions raised in this study are discussed.
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11
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Lendemeijer B, Boon P. [A call to discussion about the intervention, seclusion--communication about seclusion]. TVZ 1997; 107:386-9. [PMID: 9439240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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12
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van Meijel B, Lendemeijer B. [Implications for nursing care. Insight into illness in patients with schizophrenia]. TVZ 1997; 107:228-32. [PMID: 9418583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- B van Meijel
- Divisie Psychiatrie van het Academisch Ziekenhuis Utrecht
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13
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Lendemeijer B. [The use of isolation in psychiatry--a literature study]. Verpleegkunde 1997; 12:15-26. [PMID: 9397925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
This article reports on a literature review into the publications on the practise of seclusion. Attention will be paid to the moral debate on seclusion. The major part of the publications consider seclusion as a necessary intervention to manage problem behaviour. The first part of the article will consider definitional aspects and will result in concept clarification. The review shows differences at definitional aspects, motives for seclusion and patient characteristics. Data on frequencies, incidence and duration appear to be different. The experience of patients who are secluded are mostly negative, but positive reactions are also reported. Publications on the influence of the hospital characteristics to the use of seclusion seem to increase during time. Finally it is concluded that seclusion is an effective way to manage (potential) dangerous behaviour and that seclusion is an intervention which may create therapeutic conditions.
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Affiliation(s)
- B Lendemeijer
- Divisie Psychiatric van het Academisch Ziekenhuis, Utrecht.
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