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Babineau V, Jolicoeur-Martineau A, Szekely E, Green CG, Sassi R, Gaudreau H, Levitan RD, Lydon J, Steiner M, O'Donnell KJ, Kennedy JL, Burack JA, Wazana A. Maternal prenatal depression is associated with dysregulation over the first five years of life moderated by child polygenic risk for comorbid psychiatric problems. Dev Psychobiol 2023; 65:e22395. [PMID: 37338256 DOI: 10.1002/dev.22395] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 03/08/2023] [Accepted: 03/28/2023] [Indexed: 06/21/2023]
Abstract
Dysregulation is a combination of emotion, behavior, and attention problems associated with lifelong psychiatric comorbidity. There is evidence for the stability of dysregulation from childhood to adulthood, which would be more fully characterized by determining the likely stability from infancy to childhood. Early origins of dysregulation can further be validated and contextualized in association with environmental and biological factors, such as prenatal stress and polygenic risk scores (PRS) for overlapping child psychiatric problems. We aimed to determine trajectories of dysregulation from 3 months to 5 years (N = 582) in association with maternal prenatal depression moderated by multiple child PRS (N = 232 pairs with available PRS data) in a prenatal cohort. Mothers reported depression symptoms at 24-26 weeks' gestation and child dysregulation at 3, 6, 18, 36, 48, and 60 months. The PRS were for major depressive disorder, attention deficit hyperactivity disorder, cross disorder, and childhood psychiatric problems. Covariates were biological sex, maternal education, and postnatal depression. Analyses included latent classes and regression. Two dysregulation trajectories emerged: persistently low dysregulation (94%), and increasingly high dysregulation (6%). Stable dysregulation emerged at 18 months. High dysregulation was associated with maternal prenatal depression, moderated by PRS for child comorbid psychiatric problems. Males were at greater risk of high dysregulation.
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Affiliation(s)
- Vanessa Babineau
- Department of Obstetrics and Gynecology, Columbia University, New York, New York, USA
| | | | - Eszter Szekely
- Department of Psychiatry, McGill University, Montreal, Quebec, Canada
| | | | - Roberto Sassi
- Department of Psychiatry, University of British Columbia, Vancouver, British Columbia, Canada
| | - Hélène Gaudreau
- Department of Psychiatry, Douglas Mental Health University Institute, Montreal, Quebec, Canada
| | - Robert D Levitan
- Campbell Family Mental Health Research Institute, Center for Addiction and Mental Health, Toronto, Ontario, Canada
| | - John Lydon
- Department of Psychology, McGill University, Montreal, Quebec, Canada
| | - Meir Steiner
- Women's Health Concerns Clinic, St-Joseph's Healthcare Hamilton, Hamilton, Ontario, Canada
| | - Kieran J O'Donnell
- Department of Obstetrics, Gynecology and Reproductive Sciences, Yale School of Medicine, New Haven, USA
| | - James L Kennedy
- Campbell Family Mental Health Research Institute, Center for Addiction and Mental Health, Toronto, Ontario, Canada
| | - Jacob A Burack
- Department of Psychiatry, McGill University, Montreal, Quebec, Canada
| | - Ashley Wazana
- Institute of Community and Family Psychiatry, Jewish General Hospital, Montreal, Quebec, Canada
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2
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Gyongyosi B, Magyar-Stang R, Takacs T, Szekely E, Illes Z, Nilsson C, Gyorke T, Barsi P, Juhasz D, Banky B, Bereczki D, Honnorat J, Gunda B. Paraneoplastic Kelch-like protein 11 antibody-associated cerebellar and limbic encephalitis caused by metastatic “burned-out” seminoma – A scar(r)y phenomenon. J Neuroimmunol 2023; 378:578073. [PMID: 36989702 DOI: 10.1016/j.jneuroim.2023.578073] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Revised: 03/09/2023] [Accepted: 03/21/2023] [Indexed: 03/29/2023]
Abstract
INTRODUCTION The diagnosis of paraneoplastic neurologic syndromes is challenging when the primary tumor masquerades as scar tissue (i.e. "burned-out"). METHODS Case report. RESULTS A 45-year-old male patient presented with progressive cerebellar symptoms and hearing loss. Initial screening for malignancy and extensive testing of paraneoplastic and autoimmune neuronal antibodies gave negative results. Repeated whole-body FDG-PET CT revealed a single paraaortic lymphadenopathy, metastasis of a regressed testicular seminoma. Anti-Kelch-like protein-11 (KLHL11) encephalitis was finally diagnosed. CONCLUSION Our case highlights the importance of continued efforts to find an often burned-out testicular cancer in patients with a highly unique clinical presentation of KLHL11 encephalitis.
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Affiliation(s)
- Benedek Gyongyosi
- Department of Pathology, Forensic and Insurance Medicine, Semmelweis University, Budapest, Hungary
| | - Rita Magyar-Stang
- Department of Neurology, Semmelweis University, Budapest, Hungary; János Szentágothai Doctoral School of Neurosciences, Semmelweis University, Budapest, Hungary.
| | - Timea Takacs
- Department of Neurology, Semmelweis University, Budapest, Hungary; János Szentágothai Doctoral School of Neurosciences, Semmelweis University, Budapest, Hungary
| | - Eszter Szekely
- Department of Pathology, Forensic and Insurance Medicine, Semmelweis University, Budapest, Hungary
| | - Zsolt Illes
- Department of Neurology, Odense University Hospital, Odense, Denmark
| | - Christine Nilsson
- Laboratory of Clinical Immunology, Odense University Hospital, Odense, Denmark
| | - Tamas Gyorke
- Department of Nuclear Medicine, Medical Imaging Centre, Semmelweis University, Budapest, Hungary
| | - Peter Barsi
- Department of Neuroradiology, Medical Imaging Centre, Semmelweis University, Budapest, Hungary
| | - Daniel Juhasz
- Department of Urology, Semmelweis University, Budapest, Hungary
| | - Balazs Banky
- Department of Surgery, Transplantation and Gastroenterology, Semmelweis University, Budapest, Hungary
| | - Daniel Bereczki
- Department of Neurology, Semmelweis University, Budapest, Hungary
| | - Jerome Honnorat
- French Reference Center on Paraneoplastic Neurological Diseases and Autoimmune Encephalitis, Hospices Civils de Lyon, Université Claude Bernard, Lyon, France
| | - Bence Gunda
- Department of Neurology, Semmelweis University, Budapest, Hungary
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3
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Olah C, Reis H, Hoffmann MJ, Mairinger F, Ting S, Hadaschik B, Krafft U, Grünwald V, Nyirady P, Varadi M, Győrffy B, Kiss A, Szekely E, Sjödahl G, Szarvas T. Predictive value of molecular subtypes and APOBEC3G for adjuvant chemotherapy in urothelial bladder cancer. Cancer Med 2023; 12:5222-5232. [PMID: 36204983 PMCID: PMC10028049 DOI: 10.1002/cam4.5324] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 09/08/2022] [Accepted: 09/23/2022] [Indexed: 11/07/2022] Open
Abstract
OBJECTIVE Although targeted approaches have become available in second- and third-line settings, platinum-based chemotherapy remains the standard first-line treatment for advanced muscle-invasive bladder cancer (MIBC). Therefore, the prediction of platinum resistance is of utmost clinical importance. METHODS In this study, we established a routine compatible method for the molecular classification of MIBC samples according to various classification systems and applied this method to evaluate the impact of subtypes on survival after adjuvant chemotherapy. This retrospective study included 191 patients with advanced MIBC (pT≥3 or pN+) who underwent radical cystectomy, with or without adjuvant chemotherapy. A 48-gene panel and classifier rule set were established to determine molecular subtypes according to TCGA, MDA, LundTax, and Consensus classifications. Additionally, 12 single platinum-predictive candidate genes were assessed. The results were correlated with patients' clinicopathological and follow-up data and were validated using independent data sets. RESULTS Our final evaluation of 159 patients demonstrated better survival in the luminal groups for those who received chemotherapy compared with those who did not. In contrast, no such differences were observed in basal subtypes. The use of chemotherapy was associated with better survival in patients with high APOBEC3G expression (p < 0.002). This association was confirmed using an independent data set of patients who received neoadjuvant platinum therapy. CONCLUSIONS The proposed method robustly replicates the most commonly used transcriptome-based subtype classifications from paraffin-embedded tissue samples. The luminal, but not basal, molecular subtypes had the greatest benefit from adjuvant platinum therapy. We identified and validated APOBEC3G as a novel predictive marker for platinum-treated patients.
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Affiliation(s)
- Csilla Olah
- Department of Urology, University of Duisburg-Essen, Essen, Germany
| | - Henning Reis
- Dr. Senckenberg Institute of Pathology, University Hospital Frankfurt, Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Michèle J Hoffmann
- Department of Urology, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Fabian Mairinger
- Institute of Pathology, University Medicine Essen, University of Duisburg-Essen, Essen, Germany
| | - Saskia Ting
- Institute of Pathology, University Medicine Essen, University of Duisburg-Essen, Essen, Germany
| | - Boris Hadaschik
- Department of Urology, University of Duisburg-Essen, Essen, Germany
| | - Ulrich Krafft
- Department of Urology, University of Duisburg-Essen, Essen, Germany
| | - Viktor Grünwald
- Department of Medical Oncology, University of Duisburg-Essen, Essen, Germany
| | - Peter Nyirady
- Department of Urology, Semmelweis University, Budapest, Hungary
| | - Melinda Varadi
- Department of Urology, Semmelweis University, Budapest, Hungary
| | - Balázs Győrffy
- Research Centre for Natural Sciences, Cancer Biomarker Research Group, Institute of Enzymology, Budapest, Hungary
- 2nd Department of Pediatrics and Department of Bioinformatics, Semmelweis University, Budapest, Hungary
| | - Andras Kiss
- 2nd Department of Pathology, Semmelweis University, Budapest, Hungary
| | - Eszter Szekely
- 2nd Department of Pathology, Semmelweis University, Budapest, Hungary
| | - Gottfrid Sjödahl
- Department of Translational Medicine, Lund University, Lund, Sweden
| | - Tibor Szarvas
- Department of Urology, University of Duisburg-Essen, Essen, Germany
- Department of Urology, Semmelweis University, Budapest, Hungary
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4
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Neumann A, Jolicoeur‐Martineau A, Szekely E, Sallis HM, O’Donnel K, Greenwood CM, Levitan R, Meaney MJ, Wazana A, Evans J, Tiemeier H. Combined polygenic risk scores of different psychiatric traits predict general and specific psychopathology in childhood. J Child Psychol Psychiatry 2022; 63:636-645. [PMID: 34389974 PMCID: PMC9291767 DOI: 10.1111/jcpp.13501] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/14/2021] [Indexed: 12/22/2022]
Abstract
BACKGROUND Polygenic risk scores (PRSs) operationalize genetic propensity toward a particular mental disorder and hold promise as early predictors of psychopathology, but before a PRS can be used clinically, explanatory power must be increased and the specificity for a psychiatric domain established. To enable early detection, it is crucial to study these psychometric properties in childhood. We examined whether PRSs associate more with general or with specific psychopathology in school-aged children. Additionally, we tested whether psychiatric PRSs can be combined into a multi-PRS score for improved performance. METHODS We computed 16 PRSs based on GWASs of psychiatric phenotypes, but also neuroticism and cognitive ability, in mostly adult populations. Study participants were 9,247 school-aged children from three population-based cohorts of the DREAM-BIG consortium: ALSPAC (UK), The Generation R Study (Netherlands), and MAVAN (Canada). We associated each PRS with general and specific psychopathology factors, derived from a bifactor model based on self-report and parental, teacher, and observer reports. After fitting each PRS in separate models, we also tested a multi-PRS model, in which all PRSs are entered simultaneously as predictors of the general psychopathology factor. RESULTS Seven PRSs were associated with the general psychopathology factor after multiple testing adjustment, two with specific externalizing and five with specific internalizing psychopathology. PRSs predicted general psychopathology independently of each other, with the exception of depression and depressive symptom PRSs. Most PRSs associated with a specific psychopathology domain, were also associated with general child psychopathology. CONCLUSIONS The results suggest that PRSs based on current GWASs of psychiatric phenotypes tend to be associated with general psychopathology, or both general and specific psychiatric domains, but not with one specific psychopathology domain only. Furthermore, PRSs can be combined to improve predictive ability. PRS users should therefore be conscious of nonspecificity and consider using multiple PRSs simultaneously, when predicting psychiatric disorders.
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Affiliation(s)
- Alexander Neumann
- Department of Child and Adolescent PsychiatryErasmus University Medical CenterRotterdamThe Netherlands,Lady Davis Institute for Medical ResearchJewish General HospitalMontrealQCCanada,VIB Center for Molecular NeurologyVIBAntwerpBelgium,Department of Biomedical SciencesUniversity of AntwerpAntwerpBelgium
| | | | - Eszter Szekely
- Lady Davis Institute for Medical ResearchJewish General HospitalMontrealQCCanada,Department of PsychiatryMcGill University Faculty of MedicineMontrealQCCanada
| | - Hannah M. Sallis
- MRC Integrative Epidemiology UnitUniversity of BristolBristolUK,Centre for Academic Mental Health, Population Health SciencesBristol Medical SchoolUniversity of BristolBristolUK,School of Psychological ScienceUniversity of BristolBristolUK
| | - Kieran O’Donnel
- Department of Psychiatry and Sackler Program for Epigenetics and PsychobiologyMcGill UniversityMontrealQCCanada,Ludmer Centre for Neuroinformatics and Mental HealthMcGill UniversityMontrealQCCanada
| | - Celia M.T. Greenwood
- Lady Davis Institute for Medical ResearchJewish General HospitalMontrealQCCanada,Departments of Oncology, Human Genetics, and Epidemiology, Biostatistics and Occupational HealthMcGill UniversityMontrealQCCanada
| | - Robert Levitan
- Centre for Addiction and Mental HealthTorontoONCanada,Department of PsychiatryUniversity of TorontoTorontoONCanada
| | - Michael J. Meaney
- Department of PsychiatryMcGill University Faculty of MedicineMontrealQCCanada,Douglas Mental Health InstituteMontrealQCCanada,Singapore Institute for Clinical SciencesSingapore CitySingapore
| | - Ashley Wazana
- Lady Davis Institute for Medical ResearchJewish General HospitalMontrealQCCanada,Department of PsychiatryMcGill University Faculty of MedicineMontrealQCCanada,Centre for Child Development and Mental HealthJewish General HospitalMontrealQCCanada
| | - Jonathan Evans
- Centre for Academic Mental Health, Population Health SciencesBristol Medical SchoolUniversity of BristolBristolUK
| | - Henning Tiemeier
- Department of Child and Adolescent PsychiatryErasmus University Medical CenterRotterdamThe Netherlands,Department of Social and Behavioral SciencesHarvard T. H. Chan School of Public HealthBostonMAUSA
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5
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Szekely E, Jolicoeur-Martineau A, Atkinson L, Levitan RD, Steiner M, Lydon JE, Fleming AS, Kennedy JL, Wazana A. The Interplay Between Prenatal Adversity, Offspring Dopaminergic Genes, and Early Parenting on Toddler Attentional Function. Front Behav Neurosci 2021; 15:701971. [PMID: 34413728 PMCID: PMC8370126 DOI: 10.3389/fnbeh.2021.701971] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Accepted: 07/12/2021] [Indexed: 11/13/2022] Open
Abstract
Background: Few studies have explored the complex gene-by-prenatal environment-by-early postnatal environment interactions that underlie the development of attentional competence. Here, we examined if variation in dopamine-related genes interacts with prenatal adversity to influence toddler attentional competence and whether this influence is buffered by early positive maternal behavior. Methods: From the Maternal Adversity, Vulnerability and Neurodevelopment cohort, 134 participants (197 when imputing missing data) had information on prenatal adversity (prenatal stressful life events, prenatal maternal depressive symptoms, and birth weight), five dopamine-related genes (DAT1, DRD4, DRD2, COMT, BDNF), observed maternal parenting behavior at 6 months and parent-rated toddler attentional competence at 18 and 24 months. The Latent Environmental and Genetic Interaction (LEGIT) approach was used to examine genes-by-prenatal environment-by-postnatal environment interactions while controlling for sociodemographic factors and postnatal depression. Results: Our hypothesis of a three-way interaction between prenatal adversity, dopamine-related genes, and early maternal parenting behavior was not confirmed. However, consistent two-way interactions emerged between prenatal adversity and dopamine-related genes; prenatal adversity and maternal parenting behavior, and dopamine-related genes and maternal parenting behavior in relation to toddler attentional competence. Significant interaction effects were driven by the DAT1, COMT, and BDNF genotypes; prenatal stressful life events; maternal sensitivity, tactile stimulation, vocalization, and infant-related activities. Conclusions: Multiple dopamine-related genes affected toddler attentional competence and they did so in interaction with prenatal adversity and the early rearing environment, separately. Effects were already visible in young children. Several aspects of early maternal parenting have been identified as potential targets for intervention.
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Affiliation(s)
- Eszter Szekely
- Department of Psychiatry, McGill University Faculty of Medicine, Montreal, QC, Canada.,Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, QC, Canada
| | - Alexia Jolicoeur-Martineau
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, QC, Canada.,MILA-Quebec Artificial Intelligence Institute, Montreal, QC, Canada.,Department of Computer Sciences, Université de Montréal, Montreal, QC, Canada
| | - Leslie Atkinson
- Department of Psychology, Ryerson University, Toronto, ON, Canada
| | - Robert D Levitan
- Centre for Addiction and Mental Health, Toronto, ON, Canada.,Department of Psychiatry, University of Toronto, Toronto, ON, Canada
| | - Meir Steiner
- Department of Psychiatry and Behavioural Neurosciences, McMaster University, Hamilton, ON, Canada
| | - John E Lydon
- Department of Psychology, McGill University, Montreal, QC, Canada
| | - Alison S Fleming
- Department of Psychology, University of Toronto Mississauga, Toronto, ON, Canada
| | | | - Ashley Wazana
- Department of Psychiatry, McGill University Faculty of Medicine, Montreal, QC, Canada.,Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, QC, Canada.,Centre for Child Development and Mental Health, Jewish General Hospital, Montreal, QC, Canada
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6
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Szekely E, Neumann A, Sallis H, Jolicoeur-Martineau A, Verhulst FC, Meaney MJ, Pearson RM, Levitan RD, Kennedy JL, Lydon JE, Steiner M, Greenwood CMT, Tiemeier H, Evans J, Wazana A. Maternal Prenatal Mood, Pregnancy-Specific Worries, and Early Child Psychopathology: Findings From the DREAM BIG Consortium. J Am Acad Child Adolesc Psychiatry 2021; 60:186-197. [PMID: 32278003 DOI: 10.1016/j.jaac.2020.02.017] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 02/06/2020] [Accepted: 03/11/2020] [Indexed: 10/24/2022]
Abstract
OBJECTIVE Few studies have attempted to identify how distinct dimensions of maternal prenatal affective symptoms relate to offspring psychopathology. We defined latent dimensions of women's prenatal affective symptoms and pregnancy-specific worries to examine their association with early offspring psychopathology in three prenatal cohorts. METHOD Data were used from three cohorts of the DREAM-BIG consortium: Avon Longitudinal Study of Parents and Children (ALSPAC [N = 12,515]), Generation R (N = 6,803), and the Canadian prenatal cohort Maternal Adversity, Vulnerability, and Neurodevelopment (MAVAN [N = 578]). Maternal prenatal affective symptoms and pregnancy-specific worries were assessed using different measures in each cohort. Through confirmatory factor analyses, we determined whether comparable latent dimensions of prenatal maternal affective symptoms existed across the cohorts. We used structural equation models to examine cohort-specific associations between these dimensions and offspring psychopathology at 4 to 8 years of age (general psychopathology, specific internalizing and externalizing previously derived using confirmatory factor analyses). Cohort-based estimates were meta-analyzed using inverse variance-weighing. RESULTS Four prenatal maternal factors were similar in all cohorts: a general affective symptoms factor and three specific factors-an anxiety/depression factor, a somatic factor, and a pregnancy-specific worries factor. In meta-analyses, both the general affective symptoms factor and pregnancy-specific worries factor were independently associated with offspring general psychopathology. The general affective symptoms factor was further associated with offspring specific internalizing problems. There were no associations with specific externalizing problems. CONCLUSION These replicated findings of independent and adverse effects for prenatal general affective symptoms and pregnancy-specific worries on child mental health support the need for specific interventions in pregnancy.
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Affiliation(s)
- Eszter Szekely
- McGill University Faculty of Medicine, Montreal, Quebec, Canada; Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec, Canada
| | - Alexander Neumann
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec, Canada; Erasmus University Medical Center-Sophia Children's Hospital, Rotterdam, The Netherlands
| | - Hannah Sallis
- Centre for Academic Mental Health, Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom; MRC Integrative Epidemiology Unit, University of Bristol, Bristol, United Kingdom
| | | | - Frank C Verhulst
- Erasmus University Medical Center-Sophia Children's Hospital, Rotterdam, The Netherlands; Child and Adolescent Mental Health Center, Mental Health Services, Capital Region of Denmark, Copenhagen, Denmark, and the Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
| | - Michael J Meaney
- McGill University Faculty of Medicine, Montreal, Quebec, Canada; Douglas Mental Health Institute, Montreal, Quebec, Canada, and Singapore Institute for Clinical Sciences, Singapore City, Singapore
| | - Rebecca M Pearson
- Centre for Academic Mental Health, Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom
| | - Robert D Levitan
- Centre for Addiction and Mental Health, Toronto, Ontario, Canada; University of Toronto, Toronto, Ontario, Canada
| | - James L Kennedy
- Centre for Addiction and Mental Health, Toronto, Ontario, Canada
| | - John E Lydon
- McGill University Faculty of Medicine, Montreal, Quebec, Canada
| | | | - Celia M T Greenwood
- McGill University Faculty of Medicine, Montreal, Quebec, Canada; Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec, Canada
| | - Henning Tiemeier
- Erasmus University Medical Center-Sophia Children's Hospital, Rotterdam, The Netherlands; Harvard T. H. Chan School of Public Health, Boston, Massachusetts
| | - Jonathan Evans
- Centre for Academic Mental Health, Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom
| | - Ashley Wazana
- McGill University Faculty of Medicine, Montreal, Quebec, Canada; Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec, Canada; Centre for Child Development and Mental Health, Jewish General Hospital, Montreal, Quebec, Canada.
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7
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Szarvas T, Hoffmann MJ, Olah C, Szekely E, Kiss A, Hess J, Tschirdewahn S, Hadaschik B, Grotheer V, Nyirady P, Csizmarik A, Varadi M, Reis H. MMP-7 Serum and Tissue Levels Are Associated with Poor Survival in Platinum-Treated Bladder Cancer Patients. Diagnostics (Basel) 2020; 11:diagnostics11010048. [PMID: 33396213 PMCID: PMC7824149 DOI: 10.3390/diagnostics11010048] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 11/17/2020] [Revised: 12/19/2020] [Accepted: 12/26/2020] [Indexed: 01/09/2023] Open
Abstract
Chemotherapy resistance is a main cause of therapeutic failure and death in bladder cancer. With the approval of immune checkpoint inhibitors, prediction of platinum treatment became of great clinical importance. Matrix metalloproteinase-7 (MMP-7) was shown to be involved in cisplatin resistance. Therefore, tissue and circulating MMP-7 levels were evaluated in 124 bladder cancer patients who received postoperative platinum-based chemotherapy. Tissue MMP-7 levels were analyzed by immunohistochemistry in 72 formalin-fixed, paraffin-embedded chemo-naïve tumor samples, while MMP-7 serum concentrations were determined in 132 serum samples of an independent cohort of 52 patients. MMP-7 tissue and serum levels were correlated with clinicopathological and follow-up data. MMP-7 gene expression was determined by RT-qPCR in 20 urothelial cancer cell lines and two non-malignant urothelial cell lines. MMP-7 was overexpressed in RT-112 and T-24 cells by stable transfection, to assess its functional involvement in platinum sensitivity. High MMP-7 tissue expression and pretreatment serum concentrations were independently associated with poor overall survival (tissue HR = 2.296, 95%CI = 1.235–4.268 and p = 0.009; serum HR = 2.743, 95%CI = 1.258–5.984 and p = 0.011). Therefore, MMP-7 tissue and serum analysis may help to optimize therapeutic decisions. Stable overexpression in RT-112 and T-24 cells did not affect platinum sensitivity.
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Affiliation(s)
- Tibor Szarvas
- Department of Urology, University of Duisburg-Essen, 45147 Essen, Germany; (C.O.); (J.H.); (S.T.); (B.H.)
- Department of Urology, Semmelweis University, 1089 Budapest, Hungary; (P.N.); (A.C.); (M.V.)
- Correspondence: ; Tel.: +49-201-7238-4967
| | - Michèle J. Hoffmann
- Department of Urology, Medical Faculty, Heinrich-Heine-University Duesseldorf, 40225 Duesseldorf, Germany;
| | - Csilla Olah
- Department of Urology, University of Duisburg-Essen, 45147 Essen, Germany; (C.O.); (J.H.); (S.T.); (B.H.)
| | - Eszter Szekely
- 2nd Department of Pathology, Semmelweis University, 1091 Budapest, Hungary; (E.S.); (A.K.)
| | - Andras Kiss
- 2nd Department of Pathology, Semmelweis University, 1091 Budapest, Hungary; (E.S.); (A.K.)
| | - Jochen Hess
- Department of Urology, University of Duisburg-Essen, 45147 Essen, Germany; (C.O.); (J.H.); (S.T.); (B.H.)
| | - Stephan Tschirdewahn
- Department of Urology, University of Duisburg-Essen, 45147 Essen, Germany; (C.O.); (J.H.); (S.T.); (B.H.)
| | - Boris Hadaschik
- Department of Urology, University of Duisburg-Essen, 45147 Essen, Germany; (C.O.); (J.H.); (S.T.); (B.H.)
| | - Vera Grotheer
- Department of Orthopedics and Trauma Surgery, Medical Faculty, Heinrich-Heine-University Duesseldorf, 40225 Duesseldorf, Germany;
| | - Peter Nyirady
- Department of Urology, Semmelweis University, 1089 Budapest, Hungary; (P.N.); (A.C.); (M.V.)
| | - Anita Csizmarik
- Department of Urology, Semmelweis University, 1089 Budapest, Hungary; (P.N.); (A.C.); (M.V.)
| | - Melinda Varadi
- Department of Urology, Semmelweis University, 1089 Budapest, Hungary; (P.N.); (A.C.); (M.V.)
| | - Henning Reis
- Institute of Pathology, University Hospital Essen, University of Duisburg-Essen, 45147 Essen, Germany;
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8
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Sallis H, Szekely E, Neumann A, Jolicoeur‐Martineau A, van IJzendoorn M, Hillegers M, Greenwood CM, Meaney MJ, Steiner M, Tiemeier H, Wazana A, Pearson RM, Evans J. General psychopathology, internalising and externalising in children and functional outcomes in late adolescence. J Child Psychol Psychiatry 2019; 60:1183-1190. [PMID: 31049953 PMCID: PMC6849715 DOI: 10.1111/jcpp.13067] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [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] [Accepted: 03/20/2019] [Indexed: 12/13/2022]
Abstract
BACKGROUND Internalising and externalising problems commonly co-occur in childhood. Yet, few developmental models describing the structure of child psychopathology appropriately account for this comorbidity. We evaluate a model of childhood psychopathology that separates the unique and shared contribution of individual psychological symptoms into specific internalising, externalising and general psychopathology factors and assess how these general and specific factors predict long-term outcomes concerning criminal behaviour, academic achievement and affective symptoms in three independent cohorts. METHODS Data were drawn from independent birth cohorts (Avon Longitudinal Study of Parents and Children (ALSPAC), N = 11,612; Generation R, N = 7,946; Maternal Adversity, Vulnerability and Neurodevelopment (MAVAN), N = 408). Child psychopathology was assessed between 4 and 8 years using a range of diagnostic and questionnaire-based measures, and multiple informants. First, structural equation models were used to assess the fit of hypothesised models of shared and unique components of psychopathology in all cohorts. Once the model was chosen, linear/logistic regressions were used to investigate whether these factors were associated with important outcomes such as criminal behaviour, academic achievement and well-being from late adolescence/early adulthood. RESULTS The model that included specific factors for internalising/externalising and a general psychopathology factor capturing variance shared between symptoms regardless of their classification fits well for all of the cohorts. As hypothesised, general psychopathology factor scores were predictive of all outcomes of later functioning, while specific internalising factor scores predicted later internalising outcomes. Specific externalising factor scores, capturing variance not shared by any other psychological symptoms, were not predictive of later outcomes. CONCLUSIONS Early symptoms of psychopathology carry information that is syndrome-specific as well as indicative of general vulnerability and the informant reporting on the child. The 'general psychopathology factor' might be more relevant for long-term outcomes than specific symptoms. These findings emphasise the importance of considering the co-occurrence of common internalising and externalising problems in childhood when considering long-term impact.
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Affiliation(s)
- Hannah Sallis
- Centre for Academic Mental Health, Population Health SciencesBristol Medical SchoolUniversity of BristolBristolUK
- MRC Integrative Epidemiology UnitUniversity of BristolBristolUK
- UK Centre for Tobacco and Alcohol StudiesSchool of Psychological ScienceUniversity of BristolBristolUK
| | - Eszter Szekely
- Department of PsychiatryFaculty of MedicineMcGill UniversityMontréalQCCanada
- Lady Davis Institute for Medical ResearchJewish General HospitalMontréalQCCanada
| | - Alexander Neumann
- Department of Child and Adolescent Psychiatry/PsychologyErasmus MC University Medical Center RotterdamRotterdamThe Netherlands
| | | | - Marinus van IJzendoorn
- Department of Psychology, Education and Child StudiesErasmus University RotterdamRotterdamThe Netherlands
- Primary Care UnitSchool of Clinical MedicineUniversity of CambridgeCambridgeUK
| | - Manon Hillegers
- Department of Child and Adolescent Psychiatry/PsychologyErasmus MC University Medical Center RotterdamRotterdamThe Netherlands
| | - Celia M.T. Greenwood
- Lady Davis Institute for Medical ResearchJewish General HospitalMontréalQCCanada
- Department of Epidemiology, Biostatistics and Occupational HealthMcGill UniversityMontréalQCCanada
- Departments of Oncology and Human GeneticsMcGill UniversityMontréalQCCanada
| | - Michael J Meaney
- Department of PsychiatryFaculty of MedicineMcGill UniversityMontréalQCCanada
- Douglas Mental Health University InstituteMontréalQCCanada
- Sackler Program for Epigenetics & PsychobiologyMcGill UniversityMontréalQCCanada
- Singapore Institute for Clinical SciencesSingapore CitySingapore
| | - Meir Steiner
- Women's Health Concerns ClinicSt. Joseph's HealthcareHamiltonONCanada
- Departments of Psychiatry & Behavioural Neurosciences and Obstetrics & GynecologyMcMaster UniversityHamiltonONCanada
| | - Henning Tiemeier
- Department of Child and Adolescent Psychiatry/PsychologyErasmus MC University Medical Center RotterdamRotterdamThe Netherlands
- Department of Social and Behavioral SciencesHarvard T. H. Chan School of Public HealthBostonMAUSA
| | - Ashley Wazana
- Department of PsychiatryFaculty of MedicineMcGill UniversityMontréalQCCanada
- Lady Davis Institute for Medical ResearchJewish General HospitalMontréalQCCanada
- Centre for Child Development and Mental HealthJewish General HospitalMontréalQCCanada
| | - Rebecca M. Pearson
- Centre for Academic Mental Health, Population Health SciencesBristol Medical SchoolUniversity of BristolBristolUK
| | - Jonathan Evans
- Centre for Academic Mental Health, Population Health SciencesBristol Medical SchoolUniversity of BristolBristolUK
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9
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Phan HTT, Stoesser N, Maciuca IE, Toma F, Szekely E, Flonta M, Hubbard ATM, Pankhurst L, Do T, Peto TEA, Walker AS, Crook DW, Timofte D. Illumina short-read and MinION long-read WGS to characterize the molecular epidemiology of an NDM-1 Serratia marcescens outbreak in Romania. J Antimicrob Chemother 2019; 73:672-679. [PMID: 29237003 PMCID: PMC5890751 DOI: 10.1093/jac/dkx456] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Accepted: 11/06/2017] [Indexed: 11/30/2022] Open
Abstract
Background and Objectives Serratia marcescens is an emerging nosocomial pathogen, and the carbapenemase blaNDM has been reported in several surveys in Romania. We aimed to investigate the molecular epidemiology of S. marcescens in two Romanian hospitals over 2010–15, including a neonatal NDM-1 S. marcescens outbreak. Methods Isolates were sequenced using Illumina technology together with carbapenem-non-susceptible NDM-1-positive and NDM-1-negative Klebsiella pneumoniae and Enterobacter cloacae to provide genomic context. A subset was sequenced with MinION to fully resolve NDM-1 plasmid structures. Resistance genes, plasmid replicons and ISs were identified in silico for all isolates; an annotated phylogeny was reconstructed for S. marcescens. Fully resolved study NDM-1 plasmid sequences were compared with the most closely related publicly available NDM-1 plasmid reference. Results 44/45 isolates were successfully sequenced (S. marcescens, n = 33; K. pneumoniae, n = 7; E. cloacae, n = 4); 10 with MinION. The S. marcescens phylogeny demonstrated several discrete clusters of NDM-1-positive and -negative isolates. All NDM-1-positive isolates across species harboured a pKOX_NDM1-like plasmid; more detailed comparisons of the plasmid structures demonstrated a number of differences, but highlighted the largely conserved plasmid backbones across species and hospital sites. Conclusions The molecular epidemiology is most consistent with the importation of a pKOX_NDM1-like plasmid into Romania and its dissemination amongst K. pneumoniae/E. cloacae and subsequently S. marcescens across hospitals. The data suggested multiple acquisitions of this plasmid by S. marcescens in the two hospitals studied; transmission events within centres, including a large outbreak on the Targu Mures neonatal unit; and sharing of the pKOX_NDM1-like plasmid between species within outbreaks.
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Affiliation(s)
- H T T Phan
- Modernising Medical Microbiology Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK.,National Institute for Health Research (NIHR) Health Protection Research Unit (NIHR HPRU) in Healthcare Associated Infections and Antimicrobial Resistance, University of Oxford, Oxford, UK
| | - N Stoesser
- Modernising Medical Microbiology Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
| | - I E Maciuca
- Institute of Veterinary Science, University of Liverpool, Leahurst Campus, UK
| | - F Toma
- Microbiology Department, University of Medicine and Pharmacy, Targu Mures, Romania
| | - E Szekely
- Microbiology Department, University of Medicine and Pharmacy, Targu Mures, Romania
| | - M Flonta
- Clinical Hospital of Infectious Diseases, Cluj-Napoca, Romania
| | - A T M Hubbard
- Modernising Medical Microbiology Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
| | - L Pankhurst
- Modernising Medical Microbiology Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
| | - T Do
- Modernising Medical Microbiology Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
| | - T E A Peto
- Modernising Medical Microbiology Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK.,National Institute for Health Research (NIHR) Health Protection Research Unit (NIHR HPRU) in Healthcare Associated Infections and Antimicrobial Resistance, University of Oxford, Oxford, UK
| | - A S Walker
- Modernising Medical Microbiology Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK.,National Institute for Health Research (NIHR) Health Protection Research Unit (NIHR HPRU) in Healthcare Associated Infections and Antimicrobial Resistance, University of Oxford, Oxford, UK
| | - D W Crook
- Modernising Medical Microbiology Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK.,National Institute for Health Research (NIHR) Health Protection Research Unit (NIHR HPRU) in Healthcare Associated Infections and Antimicrobial Resistance, University of Oxford, Oxford, UK
| | - D Timofte
- Institute of Veterinary Science, University of Liverpool, Leahurst Campus, UK.,Institute of Infection and Global Health, University of Liverpool, Liverpool, UK
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10
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Jolicoeur-Martineau A, Wazana A, Szekely E, Steiner M, Fleming AS, Kennedy JL, Meaney MJ, Greenwood CMT. Alternating optimization for G × E modelling with weighted genetic and environmental scores: Examples from the MAVAN study. Psychol Methods 2019; 24:196-216. [DOI: 10.1037/met0000175] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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11
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Szekely E, Schwantes-An THL, Justice CM, Sabourin JA, Jansen PR, Muetzel RL, Sharp W, Tiemeier H, Sung H, White TJ, Wilson AF, Shaw P. Genetic associations with childhood brain growth, defined in two longitudinal cohorts. Genet Epidemiol 2018; 42:405-414. [PMID: 29682794 DOI: 10.1002/gepi.22122] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [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: 11/09/2017] [Revised: 03/05/2018] [Accepted: 03/19/2018] [Indexed: 01/29/2023]
Abstract
Genome-wide association studies (GWASs) are unraveling the genetics of adult brain neuroanatomy as measured by cross-sectional anatomic magnetic resonance imaging (aMRI). However, the genetic mechanisms that shape childhood brain development are, as yet, largely unexplored. In this study we identify common genetic variants associated with childhood brain development as defined by longitudinal aMRI. Genome-wide single nucleotide polymorphism (SNP) data were determined in two cohorts: one enriched for attention-deficit/hyperactivity disorder (ADHD) (LONG cohort: 458 participants; 119 with ADHD) and the other from a population-based cohort (Generation R: 257 participants). The growth of the brain's major regions (cerebral cortex, white matter, basal ganglia, and cerebellum) and one region of interest (the right lateral prefrontal cortex) were defined on all individuals from two aMRIs, and a GWAS and a pathway analysis were performed. In addition, association between polygenic risk for ADHD and brain growth was determined for the LONG cohort. For white matter growth, GWAS meta-analysis identified a genome-wide significant intergenic SNP (rs12386571, P = 9.09 × 10-9 ), near AKR1B10. This gene is part of the aldo-keto reductase superfamily and shows neural expression. No enrichment of neural pathways was detected and polygenic risk for ADHD was not associated with the brain growth phenotypes in the LONG cohort that was enriched for the diagnosis of ADHD. The study illustrates the use of a novel brain growth phenotype defined in vivo for further study.
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Affiliation(s)
- Eszter Szekely
- Section on Neurobehavioral Clinical Research, Social and Behavioral Research Branch, National Human Genome Research Institute, Bethesda, Maryland, United States of America.,Department of Psychiatry, Faculty of Medicine, McGill University, Montreal, Canada
| | - Tae-Hwi Linus Schwantes-An
- Genometrics Section, Computational and Statistical Genomics Branch, National Human Genome Research Institute, Baltimore, Maryland, United States of America.,Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Cristina M Justice
- Genometrics Section, Computational and Statistical Genomics Branch, National Human Genome Research Institute, Baltimore, Maryland, United States of America
| | - Jeremy A Sabourin
- Genometrics Section, Computational and Statistical Genomics Branch, National Human Genome Research Institute, Baltimore, Maryland, United States of America
| | - Philip R Jansen
- The Generation R Study Group, Erasmus Medical Center, Rotterdam, The Netherlands.,Department of Child and Adolescent Psychiatry/Psychology, Sophia Children's Hospital-Erasmus Medical Center, Rotterdam, The Netherlands
| | - Ryan L Muetzel
- The Generation R Study Group, Erasmus Medical Center, Rotterdam, The Netherlands.,Department of Child and Adolescent Psychiatry/Psychology, Sophia Children's Hospital-Erasmus Medical Center, Rotterdam, The Netherlands
| | - Wendy Sharp
- Section on Neurobehavioral Clinical Research, Social and Behavioral Research Branch, National Human Genome Research Institute, Bethesda, Maryland, United States of America
| | - Henning Tiemeier
- The Generation R Study Group, Erasmus Medical Center, Rotterdam, The Netherlands.,Department of Child and Adolescent Psychiatry/Psychology, Sophia Children's Hospital-Erasmus Medical Center, Rotterdam, The Netherlands.,Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Heejong Sung
- Genometrics Section, Computational and Statistical Genomics Branch, National Human Genome Research Institute, Baltimore, Maryland, United States of America
| | - Tonya J White
- The Generation R Study Group, Erasmus Medical Center, Rotterdam, The Netherlands.,Department of Child and Adolescent Psychiatry/Psychology, Sophia Children's Hospital-Erasmus Medical Center, Rotterdam, The Netherlands
| | - Alexander F Wilson
- Genometrics Section, Computational and Statistical Genomics Branch, National Human Genome Research Institute, Baltimore, Maryland, United States of America
| | - Philip Shaw
- Section on Neurobehavioral Clinical Research, Social and Behavioral Research Branch, National Human Genome Research Institute, Bethesda, Maryland, United States of America
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12
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Szekely E, Sudre GP, Sharp W, Leibenluft E, Shaw P. Defining the Neural Substrate of the Adult Outcome of Childhood ADHD: A Multimodal Neuroimaging Study of Response Inhibition. Am J Psychiatry 2017; 174:867-876. [PMID: 28659040 PMCID: PMC5744256 DOI: 10.1176/appi.ajp.2017.16111313] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
OBJECTIVE Understanding the neural processes tied to the adult outcome of childhood attention deficit hyperactivity disorder (ADHD) could guide novel interventions to improve its clinical course. It has been argued that normalization of prefrontal cortical activity drives remission from ADHD, while anomalies in subcortical processes are "fixed," present even in remission. Using multimodal neuroimaging of inhibitory processes, the authors tested these hypotheses in adults followed since childhood, contrasting remitted against persistent ADHD. METHOD Adult participants (persistent ADHD, N=35; remit-ted ADHD, N=47; never affected, N=99) were scanned with functional MRI (fMRI) (N=85), magnetoencephalography (N=33), or both (N=63) during a response inhibition task. RESULTS In fMRI analyses, during inhibition, right caudate anomalies reflected a childhood ADHD history and were present even among those who remitted. By contrast, differences related to adult outcome emerged in cortical (right inferior frontal and inferior parietal/precuneus) and cerebellar regions. The persistent ADHD group showed under-activation, whereas the remitted ADHD group did not differ significantly from the never-affected group. Magnetoencephalography showed that the association between adult symptom severity and prefrontal neuronal activity was confined to the time window covering the act of inhibition (300 ms-350 ms). Group differences in cerebellar and parietal neuronal activity occurred during the time window of performance monitoring processes (500 ms-600 ms). CONCLUSIONS By combining fMRI and magnetoencephalography, the location and time window of neuronal activity that underpins the adult outcome of ADHD was pinpointed. Thus, the cortico-cerebellar processes tied to the clinical course of ADHD are separated from the subcortical processes that are not.
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Affiliation(s)
- Eszter Szekely
- Section on Neurobehavioral and Clinical Research, Social and Behavioral Research Branch, National Human Genome Research Institute, Bethesda, MD, USA,To whom correspondence should be addressed at: Social and Behavioral Research Branch, NHGRI, 31 Center Drive, Room B1B37, Bethesda, MD 20892. ; Phone: (301) 451-4010; Fax: (301) 480-3108
| | - Gustavo P. Sudre
- Section on Neurobehavioral and Clinical Research, Social and Behavioral Research Branch, National Human Genome Research Institute, Bethesda, MD, USA,To whom correspondence should be addressed at: Social and Behavioral Research Branch, NHGRI, 31 Center Drive, Room B1B37, Bethesda, MD 20892. ; Phone: (301) 451-4010; Fax: (301) 480-3108
| | - Wendy Sharp
- Section on Neurobehavioral and Clinical Research, Social and Behavioral Research Branch, National Human Genome Research Institute, Bethesda, MD, USA
| | - Ellen Leibenluft
- Section on Bipolar Spectrum Disorders, Emotion and Development Branch, National Institute of Mental Health, Bethesda, MD, USA
| | - Philip Shaw
- Section on Neurobehavioral and Clinical Research, Social and Behavioral Research Branch, National Human Genome Research Institute, Bethesda, MD, USA,To whom correspondence should be addressed at: Social and Behavioral Research Branch, NHGRI, 31 Center Drive, Room B1B37, Bethesda, MD 20892. ; Phone: (301) 451-4010; Fax: (301) 480-3108
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13
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Hoogman M, Bralten J, Hibar DP, Mennes M, Zwiers MP, Schweren LSJ, van Hulzen KJE, Medland SE, Shumskaya E, Jahanshad N, Zeeuw PD, Szekely E, Sudre G, Wolfers T, Onnink AMH, Dammers JT, Mostert JC, Vives-Gilabert Y, Kohls G, Oberwelland E, Seitz J, Schulte-Rüther M, Ambrosino S, Doyle AE, Høvik MF, Dramsdahl M, Tamm L, van Erp TGM, Dale A, Schork A, Conzelmann A, Zierhut K, Baur R, McCarthy H, Yoncheva YN, Cubillo A, Chantiluke K, Mehta MA, Paloyelis Y, Hohmann S, Baumeister S, Bramati I, Mattos P, Tovar-Moll F, Douglas P, Banaschewski T, Brandeis D, Kuntsi J, Asherson P, Rubia K, Kelly C, Martino AD, Milham MP, Castellanos FX, Frodl T, Zentis M, Lesch KP, Reif A, Pauli P, Jernigan TL, Haavik J, Plessen KJ, Lundervold AJ, Hugdahl K, Seidman LJ, Biederman J, Rommelse N, Heslenfeld DJ, Hartman CA, Hoekstra PJ, Oosterlaan J, Polier GV, Konrad K, Vilarroya O, Ramos-Quiroga JA, Soliva JC, Durston S, Buitelaar JK, Faraone SV, Shaw P, Thompson PM, Franke B. Subcortical brain volume differences in participants with attention deficit hyperactivity disorder in children and adults: a cross-sectional mega-analysis. Lancet Psychiatry 2017; 4:310-319. [PMID: 28219628 PMCID: PMC5933934 DOI: 10.1016/s2215-0366(17)30049-4] [Citation(s) in RCA: 423] [Impact Index Per Article: 60.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 01/04/2017] [Accepted: 01/09/2017] [Indexed: 01/03/2023]
Abstract
BACKGROUND Neuroimaging studies have shown structural alterations in several brain regions in children and adults with attention deficit hyperactivity disorder (ADHD). Through the formation of the international ENIGMA ADHD Working Group, we aimed to address weaknesses of previous imaging studies and meta-analyses, namely inadequate sample size and methodological heterogeneity. We aimed to investigate whether there are structural differences in children and adults with ADHD compared with those without this diagnosis. METHODS In this cross-sectional mega-analysis, we used the data from the international ENIGMA Working Group collaboration, which in the present analysis was frozen at Feb 8, 2015. Individual sites analysed structural T1-weighted MRI brain scans with harmonised protocols of individuals with ADHD compared with those who do not have this diagnosis. Our primary outcome was to assess case-control differences in subcortical structures and intracranial volume through pooling of all individual data from all cohorts in this collaboration. For this analysis, p values were significant at the false discovery rate corrected threshold of p=0·0156. FINDINGS Our sample comprised 1713 participants with ADHD and 1529 controls from 23 sites with a median age of 14 years (range 4-63 years). The volumes of the accumbens (Cohen's d=-0·15), amygdala (d=-0·19), caudate (d=-0·11), hippocampus (d=-0·11), putamen (d=-0·14), and intracranial volume (d=-0·10) were smaller in individuals with ADHD compared with controls in the mega-analysis. There was no difference in volume size in the pallidum (p=0·95) and thalamus (p=0·39) between people with ADHD and controls. Exploratory lifespan modelling suggested a delay of maturation and a delay of degeneration, as effect sizes were highest in most subgroups of children (<15 years) versus adults (>21 years): in the accumbens (Cohen's d=-0·19 vs -0·10), amygdala (d=-0·18 vs -0·14), caudate (d=-0·13 vs -0·07), hippocampus (d=-0·12 vs -0·06), putamen (d=-0·18 vs -0·08), and intracranial volume (d=-0·14 vs 0·01). There was no difference between children and adults for the pallidum (p=0·79) or thalamus (p=0·89). Case-control differences in adults were non-significant (all p>0·03). Psychostimulant medication use (all p>0·15) or symptom scores (all p>0·02) did not influence results, nor did the presence of comorbid psychiatric disorders (all p>0·5). INTERPRETATION With the largest dataset to date, we add new knowledge about bilateral amygdala, accumbens, and hippocampus reductions in ADHD. We extend the brain maturation delay theory for ADHD to include subcortical structures and refute medication effects on brain volume suggested by earlier meta-analyses. Lifespan analyses suggest that, in the absence of well powered longitudinal studies, the ENIGMA cross-sectional sample across six decades of ages provides a means to generate hypotheses about lifespan trajectories in brain phenotypes. FUNDING National Institutes of Health.
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Affiliation(s)
- Martine Hoogman
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands; Donders Institute for Brain, Cognition and Behaviour, Nijmegen, Netherlands.
| | - Janita Bralten
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands; Donders Institute for Brain, Cognition and Behaviour, Nijmegen, Netherlands
| | - Derrek P Hibar
- Imaging Genetics Center, Mark and Mary Stevens Institute for Neuroimaging and Informatics, Keck School of Medicine of USC, University of Southern California, Marina del Rey, CA, USA
| | - Maarten Mennes
- Donders Institute for Brain, Cognition and Behaviour, Nijmegen, Netherlands
| | - Marcel P Zwiers
- Donders Institute for Brain, Cognition and Behaviour, Nijmegen, Netherlands
| | - Lizanne S J Schweren
- Department of Psychiatry, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Kimm J E van Hulzen
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands; Donders Institute for Brain, Cognition and Behaviour, Nijmegen, Netherlands
| | - Sarah E Medland
- QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia
| | - Elena Shumskaya
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands; Donders Institute for Brain, Cognition and Behaviour, Nijmegen, Netherlands
| | - Neda Jahanshad
- Imaging Genetics Center, Mark and Mary Stevens Institute for Neuroimaging and Informatics, Keck School of Medicine of USC, University of Southern California, Marina del Rey, CA, USA
| | - Patrick de Zeeuw
- NICHE-lab, Brain Center Rudolf Magnus, Department of Psychiatry, University Medical Center Utrecht, Utrecht, Netherlands
| | - Eszter Szekely
- Neurobehavioral Clinical Research Section, National Human Genome Research Institute, Bethesda, MD, USA
| | - Gustavo Sudre
- Neurobehavioral Clinical Research Section, National Human Genome Research Institute, Bethesda, MD, USA
| | - Thomas Wolfers
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands; Donders Institute for Brain, Cognition and Behaviour, Nijmegen, Netherlands
| | - Alberdingk M H Onnink
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands; Donders Institute for Brain, Cognition and Behaviour, Nijmegen, Netherlands
| | - Janneke T Dammers
- Department of Psychiatry, Radboud University Medical Center, Nijmegen, Netherlands; Donders Institute for Brain, Cognition and Behaviour, Nijmegen, Netherlands
| | - Jeanette C Mostert
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands; Donders Institute for Brain, Cognition and Behaviour, Nijmegen, Netherlands
| | - Yolanda Vives-Gilabert
- Asociación para la Innovación en Análisis, Gestión y Procesamiento de Datos Científicos y Tecnológicos, Barcelona, Spain
| | - Gregor Kohls
- Child Neuropsychology Section, University Hospital Aachen, Aachen, Germany
| | - Eileen Oberwelland
- Child Neuropsychology Section, University Hospital Aachen, Aachen, Germany; JARA Translational Brain Medicine, Research Center Juelich, Aachen, Germany
| | - Jochen Seitz
- Department of Child and Adolescent Psychiatry, University Hospital Aachen, Aachen, Germany
| | - Martin Schulte-Rüther
- Child Neuropsychology Section, University Hospital Aachen, Aachen, Germany; JARA Translational Brain Medicine, Research Center Juelich, Aachen, Germany
| | - Sara Ambrosino
- NICHE-lab, Brain Center Rudolf Magnus, Department of Psychiatry, University Medical Center Utrecht, Utrecht, Netherlands
| | - Alysa E Doyle
- Department of Psychiatry and Center for Human Genetics Research, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA; Stanley Center for Psychiatric Research at the Broad Institute, Cambridge, MA, USA
| | - Marie F Høvik
- Department of Clinical Medicine, University of Bergen, Bergen, Norway
| | | | - Leanne Tamm
- Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Theo G M van Erp
- Department of Psychiatry and Human Behavior, University of California, Irvine, CA, USA
| | - Anders Dale
- Departments of Neurosciences and Radiology, University of California, San Diego, San Diego, CA, USA; UCSD Center for Translational Imaging and Precision Medicine, San Diego, CA, USA
| | - Andrew Schork
- Department of Cognitive Science, UC San Diego, La Jolla, CA, USA
| | - Annette Conzelmann
- Department of Child and Adolescent Psychiatry and Psychotherapy, University of Tübingen, Tübingen, Germany; Department of Psychology, University of Würzburg, Würzburg, Germany
| | - Kathrin Zierhut
- Department of Medical Psychology and Psychotherapy, Medical Sociology and Rehabilitation Sciences, University of Würzburg, Würzburg, Germany; Department of Psychology, University of Würzburg, Würzburg, Germany
| | - Ramona Baur
- Department of Psychology, University of Würzburg, Würzburg, Germany
| | - Hazel McCarthy
- Department of Psychiatry, University of Dublin, Trinity College Dublin, Dublin, Ireland
| | - Yuliya N Yoncheva
- The Child Study Center at NYU Langone Medical Center, New York, NY, USA
| | - Ana Cubillo
- Department of Child and Adolescent Psychiatry, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Kaylita Chantiluke
- Department of Child and Adolescent Psychiatry, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Mitul A Mehta
- Department of Neuroimaging, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Yannis Paloyelis
- Department of Neuroimaging, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Sarah Hohmann
- Department of Child and Adolescent Psychiatry and Psychotherapy, Central Institute of Mental Health Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Sarah Baumeister
- Department of Child and Adolescent Psychiatry and Psychotherapy, Central Institute of Mental Health Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Ivanei Bramati
- D'Or Institute for Research and Education, Rio de Janeiro, Brazil
| | - Paulo Mattos
- D'Or Institute for Research and Education, Rio de Janeiro, Brazil; Institute of Psychiatry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Fernanda Tovar-Moll
- D'Or Institute for Research and Education, Rio de Janeiro, Brazil; Morphological Sciences Program, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Pamela Douglas
- Department of Psychiatry, University of California, Los Angeles, CA, USA
| | - Tobias Banaschewski
- Department of Child and Adolescent Psychiatry and Psychotherapy, Central Institute of Mental Health Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Daniel Brandeis
- Department of Child and Adolescent Psychiatry and Psychotherapy, Central Institute of Mental Health Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany; Department of Child and Adolescent Psychiatry, Psychiatric Hospital, University of Zurich, Zurich, Switzerland; Zurich Center for Integrative Human Physiology, University of Zurich, Zurich, Switzerland; Neuroscience Centre Zurich, University of Zurich, Zurich, Switzerland; ETH Zurich, Zurich, Switzerland
| | - Jonna Kuntsi
- Social Genetic and Developmental Psychiatry, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Philip Asherson
- Social Genetic and Developmental Psychiatry, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Katya Rubia
- Department of Child and Adolescent Psychiatry, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Clare Kelly
- Department of Psychiatry, University of Dublin, Trinity College Dublin, Dublin, Ireland; The Child Study Center at NYU Langone Medical Center, New York, NY, USA; Trinity College Institute of Neuroscience, Dublin, Ireland
| | | | - Michael P Milham
- Center for the Developing Brain, Child Mind Institute, New York, NY, USA; Center for Biomedical Imaging and Neuromodulation, Nathan Kline Institute for Psychiatric Research, Orangeburg, NY, USA
| | - Francisco X Castellanos
- The Child Study Center at NYU Langone Medical Center, New York, NY, USA; Division of Child and Adolescent Psychiatric Research, Nathan Kline Institute for Psychiatric Research, Orangeburg, NY, USA
| | - Thomas Frodl
- Department of Psychiatry, University of Dublin, Trinity College Dublin, Dublin, Ireland; Department of Psychiatry and Psychotherapy, University Hospital, Otto-von-Guericke-University, Magdeburg, Germany
| | - Mariam Zentis
- Department of Psychiatry and Psychotherapy, University Hospital, Otto-von-Guericke-University, Magdeburg, Germany
| | - Klaus-Peter Lesch
- Division of Molecular Psychiatry, Center of Mental Health, University of Würzburg, Würzburg, Germany; Department of Translational Neuroscience, School for Mental Health and Neuroscience, Maastricht University, Maastricht, Netherlands
| | - Andreas Reif
- Department of Psychiatry, Psychosomatic Medicine and Psychotherapy, University Hospital Frankfurt, Frankfurt, Germany
| | - Paul Pauli
- Department of Psychology, University of Würzburg, Würzburg, Germany
| | - Terry L Jernigan
- Departments of Cognitive Science, Psychiatry, Radiology, and Center for Human Development, University of California, San Diego, CA, USA
| | - Jan Haavik
- KG Jebsen Centre for Neuropsychiatric Disorders, Department of Biomedicine, University of Bergen, Bergen, Norway; Department of Psychiatry, Haukeland University Hospital, Bergen, Norway
| | | | - Astri J Lundervold
- Department of Biological and Medical Psychology, University of Bergen, Bergen, Norway
| | - Kenneth Hugdahl
- Department of Psychiatry, Haukeland University Hospital, Bergen, Norway; Department of Radiology, Haukeland University Hospital, Bergen, Norway; Department of Biological and Medical Psychology, University of Bergen, Bergen, Norway
| | - Larry J Seidman
- Department of Psychiatry, Harvard Medical School, Boston, MA, USA; Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Joseph Biederman
- Department of Psychiatry, Harvard Medical School, Boston, MA, USA; Clinical and Research Programs in Pediatric Psychopharmacology and Adult ADHD, Massachusetts General Hospital, Boston, MA, USA
| | - Nanda Rommelse
- Department of Psychiatry, Radboud University Medical Center, Nijmegen, Netherlands; Karakter Child and Adolescent Psychiatry, Nijmegen, Netherlands
| | - Dirk J Heslenfeld
- Department of Cognitive Psychology, VU University Amsterdam, Amsterdam, Netherlands; Department of Clinical Neuropsychology, VU University Amsterdam, Amsterdam, Netherlands
| | - Catharina A Hartman
- Department of Psychiatry, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Pieter J Hoekstra
- Department of Psychiatry, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Jaap Oosterlaan
- Department of Clinical Neuropsychology, VU University Amsterdam, Amsterdam, Netherlands
| | - Georg von Polier
- Child Neuropsychology Section, University Hospital Aachen, Aachen, Germany
| | - Kerstin Konrad
- Child Neuropsychology Section, University Hospital Aachen, Aachen, Germany
| | - Oscar Vilarroya
- Department of Psychiatry and Legal Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain; Fundació IMIM, Barcelona, Spain
| | - Josep Antoni Ramos-Quiroga
- Department of Psychiatry and Legal Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain; Department of Psychiatry, Hospital Universitari Vall d'Hebron, CIBERSAM, Barcelona, Spain
| | - Joan Carles Soliva
- Department of Psychiatry and Legal Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Sarah Durston
- NICHE-lab, Brain Center Rudolf Magnus, Department of Psychiatry, University Medical Center Utrecht, Utrecht, Netherlands
| | - Jan K Buitelaar
- Department of Cognitive Neuroscience, Radboud University Medical Center, Nijmegen, Netherlands; Donders Institute for Brain, Cognition and Behaviour, Nijmegen, Netherlands; Karakter Child and Adolescent Psychiatry, Nijmegen, Netherlands
| | - Stephen V Faraone
- KG Jebsen Centre for Neuropsychiatric Disorders, Department of Biomedicine, University of Bergen, Bergen, Norway; Department of Psychiatry, SUNY Upstate Medical University, Syracuse, NY, USA
| | - Philip Shaw
- Neurobehavioral Clinical Research Section, National Human Genome Research Institute, Bethesda, MD, USA; National Institute of Mental Health, Bethesda, MD, USA
| | - Paul M Thompson
- Imaging Genetics Center, Mark and Mary Stevens Institute for Neuroimaging and Informatics, Keck School of Medicine of USC, University of Southern California, Marina del Rey, CA, USA
| | - Barbara Franke
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands; Department of Psychiatry, Radboud University Medical Center, Nijmegen, Netherlands; Donders Institute for Brain, Cognition and Behaviour, Nijmegen, Netherlands
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Sudre G, Choudhuri S, Szekely E, Bonner T, Goduni E, Sharp W, Shaw P. Estimating the Heritability of Structural and Functional Brain Connectivity in Families Affected by Attention-Deficit/Hyperactivity Disorder. JAMA Psychiatry 2017; 74:76-84. [PMID: 27851842 PMCID: PMC7418037 DOI: 10.1001/jamapsychiatry.2016.3072] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
IMPORTANCE Despite its high heritability, few risk genes have been identified for attention-deficit/hyperactivity disorder (ADHD). Brain-based phenotypes could aid gene discovery. There is a myriad of structural and functional connections that support cognition. Disruption of such connectivity is a key pathophysiologic mechanism for ADHD, and identifying heritable phenotypes within these connections could provide candidates for genomic studies. OBJECTIVE To identify the structural and functional connections that are heritable and pertinent to ADHD. DESIGN, SETTING, AND PARTICIPANTS Members of extended multigenerational families enriched for ADHD were evaluated. Structural connectivity was defined by diffusion tensor imaging (DTI) of white matter tract microstructure and functional connectivity through resting-state functional magnetic resonance imaging (rsfMRI). Heritability and association with ADHD symptoms were estimated in 24 extended multigenerational families enriched for ADHD (305 members with clinical phenotyping, 213 with DTI, and 193 with rsfMRI data). Findings were confirmed in 52 nuclear families (132 members with clinical phenotypes, 119 with DTI, and 84 with rsfMRI). The study and data analysis were conducted from April 1, 2010, to September 1, 2016. RESULTS In the 52 nuclear families, 86 individuals (65.2%) were male and the mean (SD) age at imaging was 20.9 (15.0) years; in the 24 multigenerational extended families, 145 individuals (47.5%) were male and mean age at imaging was 30.4 (19.7) years. Microstructural properties of white matter tracts connecting ipsilateral cortical regions and the corpus callosum were significantly heritable, ranging from total additive genetic heritability (h2) = 0.69 (SE, 0.13; P = .0000002) for radial diffusivity of the right superior longitudinal fasciculus to h2 = 0.46 (SE, 0.15; P = .0009) for fractional anisotropy of the right inferior fronto-occipital fasciculus. Association with ADHD symptoms was found in several tracts, most strongly for the right superior longitudinal fasciculus (t = -3.05; P = .003). Heritable patterns of functional connectivity were detected within the default mode (h2 = 0.36; SE, 0.16; cluster level significance, P < .002), cognitive control (h2 = 0.32; SE, 0.15; P < .002), and ventral attention networks (h2 = 0.36; SE, 0.16; P < .002). In all cases, subregions within each network showed heritable functional connectivity with the rest of that network. More symptoms of hyperactivity/impulsivity (t = -2.63; P = .008) and inattention (t = -2.34; P = .02) were associated with decreased functional connectivity within the default mode network. Some cross-modal correlations were purely phenotypic, such as that between axial diffusivity of the right superior longitudinal fasciculus and heritable aspects of the default mode network (phenotypic correlation, ρp = -0.12; P = .03). A genetic cross-modal correlation was seen between the ventral attention network and radial diffusivity of the right inferior fronto-occipital fasciculus (genetic correlation, ρg = -0.45, P = .02). CONCLUSIONS Analysis of data on multigenerational extended and nuclear families identified the features of structural and functional connectivity that are both significantly heritable and associated with ADHD. In addition, shared genetic factors account for some phenotypic correlations between functional and structural connections. Such work helps to prioritize the facets of the brain's connectivity for future genomic studies.
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Affiliation(s)
- Gustavo Sudre
- Section on Neurobehavioral Clinical Research, Social and Behavioral Research Branch, National Human Genome Research Institute
| | - Saadia Choudhuri
- Section on Neurobehavioral Clinical Research, Social and Behavioral Research Branch, National Human Genome Research Institute
| | - Eszter Szekely
- Section on Neurobehavioral Clinical Research, Social and Behavioral Research Branch, National Human Genome Research Institute
| | - Teighlor Bonner
- Section on Neurobehavioral Clinical Research, Social and Behavioral Research Branch, National Human Genome Research Institute
| | - Elanda Goduni
- Section on Neurobehavioral Clinical Research, Social and Behavioral Research Branch, National Human Genome Research Institute
| | - Wendy Sharp
- Section on Neurobehavioral Clinical Research, Social and Behavioral Research Branch, National Human Genome Research Institute
| | - Philip Shaw
- Section on Neurobehavioral Clinical Research, Social and Behavioral Research Branch, National Human Genome Research Institute
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15
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Szekely E, Pappa I, Wilson JD, Bhamidi S, Jaddoe VW, Verhulst FC, Tiemeier H, Shaw P. Childhood peer network characteristics: genetic influences and links with early mental health trajectories. J Child Psychol Psychiatry 2016; 57:687-94. [PMID: 26689862 DOI: 10.1111/jcpp.12493] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/28/2015] [Indexed: 02/02/2023]
Abstract
BACKGROUND Peer relationships are important for children's mental health, yet little is known of their etiological underpinnings. Here, we explore the genetic influences on childhood peer network characteristics in three different networks defined by rejection, acceptance, and prosocial behavior. We further examine the impact of early externalizing and internalizing trajectories on these same peer network characteristics. METHODS Participants were 1,288 children from the Dutch 'Generation R' birth cohort. At age 7, we mapped out children's classroom peer networks for peer rejection, acceptance, and prosocial behavior using mutual peer nominations. In each network, genetic influences were estimated for children's degree centrality, closeness centrality and link reciprocity from DNA using Genome-wide Complex Trait Analysis. Preschool externalizing and internalizing trajectories were computed using parental ratings at ages 1.5, 3, and 5 years. RESULTS Of the three network properties examined, closeness centrality emerged as significantly heritable across all networks. Preschool externalizing problems predicted unfavorable positions within peer rejection networks and having fewer mutual friendships. In contrast, children with preschool-internalizing problems were not actively rejected by their peers, but were less well-connected within their social support network. CONCLUSIONS Our finding of significant heritability for closeness centrality should be taken as preliminary evidence that requires replication. Nevertheless, it can orient us to the role of genes in shaping a child's position within peer networks. Additionally, social network perspectives offer rich insights into how early life mental health trajectories impact a child's later functioning within peer networks.
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Affiliation(s)
- Eszter Szekely
- Section on Neurobehavioral Clinical Research, Social and Behavioral Research Branch, National Human Genome Research Institute, Bethesda, MD, USA
| | - Irene Pappa
- School of Pedagogical and Educational Sciences, Erasmus University Rotterdam, Rotterdam, The Netherlands.,Generation R Study Group, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - James D Wilson
- Department of Mathematics and Statistics, University of San Francisco, San Francisco, CA, USA
| | - Shankar Bhamidi
- Department of Statistics and Operations Research, University of North Carolina, Chapel Hill, NC, USA
| | - Vincent W Jaddoe
- Generation R Study Group, Erasmus University Medical Center, Rotterdam, The Netherlands.,Department of Epidemiology, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Frank C Verhulst
- Department of Child and Adolescent Psychiatry/Psychology, Erasmus University Medical Center-Sophia Children's Hospital, Rotterdam, The Netherlands
| | - Henning Tiemeier
- Generation R Study Group, Erasmus University Medical Center, Rotterdam, The Netherlands.,Department of Child and Adolescent Psychiatry/Psychology, Erasmus University Medical Center-Sophia Children's Hospital, Rotterdam, The Netherlands
| | - Philip Shaw
- Section on Neurobehavioral Clinical Research, Social and Behavioral Research Branch, National Human Genome Research Institute, Bethesda, MD, USA
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Acs B, Szekely N, Szasz AM, Lotz G, Szekely T, Istok R, Szekely E, Madaras L, Kulka J, Jaray B. Reliability of immunocytochemistry and fluorescence in situ hybridization on fine-needle aspiration cytology samples of breast cancers: A comparative study. Diagn Cytopathol 2016; 44:466-71. [DOI: 10.1002/dc.23463] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Revised: 01/15/2016] [Accepted: 02/12/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Balazs Acs
- 2nd Department of Pathology; Semmelweis University; Budapest Hungary
| | - Nora Szekely
- 2nd Department of Pathology; Semmelweis University; Budapest Hungary
| | | | - Gabor Lotz
- 2nd Department of Pathology; Semmelweis University; Budapest Hungary
| | - Tamas Szekely
- 2nd Department of Pathology; Semmelweis University; Budapest Hungary
| | - Roland Istok
- 2nd Department of Pathology; Semmelweis University; Budapest Hungary
| | - Eszter Szekely
- 2nd Department of Pathology; Semmelweis University; Budapest Hungary
| | - Lilla Madaras
- 2nd Department of Pathology; Semmelweis University; Budapest Hungary
| | - Janina Kulka
- 2nd Department of Pathology; Semmelweis University; Budapest Hungary
| | - Balazs Jaray
- 2nd Department of Pathology; Semmelweis University; Budapest Hungary
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Pappa I, Szekely E, Mileva-Seitz VR, Luijk MPCM, Bakermans-Kranenburg MJ, van IJzendoorn MH, Tiemeier H. Beyond the usual suspects: a multidimensional genetic exploration of infant attachment disorganization and security. Attach Hum Dev 2015; 17:288-301. [PMID: 25939396 DOI: 10.1080/14616734.2015.1037316] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Although the environmental influences on infant attachment disorganization and security are well-studied, little is known about their heritability. Candidate gene studies have shown small, often non-replicable effects. In this study, we gathered the largest sample (N = 657) of ethnically homogenous, 14-month-old children with both observed attachment and genome-wide data. First, we used a Genome-Wide Association Study (GWAS) approach to identify single nucleotide polymorphisms (SNPs) associated with attachment disorganization and security. Second, we annotated them into genes (Versatile Gene-based Association Study) and functional pathways. Our analyses provide evidence of novel genes (HDAC1, ZNF675, BSCD1) and pathways (synaptic transmission, cation transport) associated with attachment disorganization. Similar analyses identified a novel gene (BECN1) but no distinct pathways associated with attachment security. The results of this first extensive, exploratory study on the molecular-genetic basis of infant attachment await replication in large, independent samples.
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Affiliation(s)
- Irene Pappa
- a School of Pedagogical and Educational Sciences , Erasmus University Rotterdam , Rotterdam , The Netherlands
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18
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Pappa I, Mileva-Seitz VR, Szekely E, Verhulst FC, Bakermans-Kranenburg MJ, Jaddoe VWV, Hofman A, Tiemeier H, van IJzendoorn MH. DRD4 VNTRs, observed stranger fear in preschoolers and later ADHD symptoms. Psychiatry Res 2014; 220:982-6. [PMID: 25262643 DOI: 10.1016/j.psychres.2014.09.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Revised: 08/29/2014] [Accepted: 09/06/2014] [Indexed: 11/25/2022]
Abstract
Fear of strangers is a developmental milestone in childhood that encompasses behavioral inhibition and decreased novelty seeking. Children with attention deficit/hyperactivity disorder (ADHD) often exhibit fearless and impulsive behaviors, similar to those observed in children with atypically low levels of stranger fear. It is currently unknown whether these behaviors share common underlying biological mechanisms. Polymorphisms in the dopamine receptor 4 gene (DRD4) have been implicated in the risk for developing ADHD symptoms in childhood. Here we investigate whether (1) DRD4 variable number tandem repeats (VNTRs) are associated with both stranger fear and ADHD symptoms, and (2) stranger fear in preschoolers mediates the link between DRD4 VNTRs and ADHD in later childhood. Stranger fear was observed in a large sample (N=589) of 3-year-old Caucasian children and ADHD symptoms were assessed by a validated, mother-rated questionnaire at 6 years. We found evidence that longer DRD4 variants were associated with increased ADHD symptoms at 6 years, and that this relationship was partially mediated by lower levels of observed stranger fear at 3 years. Our results suggest a common underlying neurobiological mechanism in the association between low stranger fear and ADHD symptoms; variation in DRD4 may be an important contributor to this mechanism.
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Affiliation(s)
- Irene Pappa
- School of Pedagogical and Educational Sciences, Erasmus University Rotterdam, The Netherlands; Generation R Study Group, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Viara R Mileva-Seitz
- School of Pedagogical and Educational Sciences, Erasmus University Rotterdam, The Netherlands; Generation R Study Group, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Eszter Szekely
- Generation R Study Group, Erasmus Medical Center, Rotterdam, The Netherlands; Department of Child and Adolescent Psychiatry/Psychology, Erasmus University Medical Center-Sophia Children׳s Hospital, The Netherlands
| | - Frank C Verhulst
- Generation R Study Group, Erasmus Medical Center, Rotterdam, The Netherlands; Department of Child and Adolescent Psychiatry/Psychology, Erasmus University Medical Center-Sophia Children׳s Hospital, The Netherlands
| | | | - Vincent W V Jaddoe
- Generation R Study Group, Erasmus Medical Center, Rotterdam, The Netherlands; Department of Epidemiology, Erasmus University Medical Center-Sophia Children׳s Hospital, The Netherlands; Department of Pediatrics, Erasmus University Medical Center-Sophia Children׳s Hospital, The Netherlands
| | - Albert Hofman
- Department of Epidemiology, Erasmus University Medical Center-Sophia Children׳s Hospital, The Netherlands
| | - Henning Tiemeier
- Generation R Study Group, Erasmus Medical Center, Rotterdam, The Netherlands; Department of Child and Adolescent Psychiatry/Psychology, Erasmus University Medical Center-Sophia Children׳s Hospital, The Netherlands
| | - Marinus H van IJzendoorn
- School of Pedagogical and Educational Sciences, Erasmus University Rotterdam, The Netherlands; Generation R Study Group, Erasmus Medical Center, Rotterdam, The Netherlands; Centre for Child and Family Studies, Leiden University, PO Box 9555, 2300 RB Leiden, The Netherlands.
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Tiemeier H, Velders FP, Szekely E, Roza SJ, Dieleman G, Jaddoe VWV, Uitterlinden AG, White TJH, Bakermans-Kranenburg MJ, Hofman A, Van Ijzendoorn MH, Hudziak JJ, Verhulst FC. The Generation R Study: a review of design, findings to date, and a study of the 5-HTTLPR by environmental interaction from fetal life onward. J Am Acad Child Adolesc Psychiatry 2012; 51:1119-1135.e7. [PMID: 23101739 DOI: 10.1016/j.jaac.2012.08.021] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2012] [Revised: 05/23/2012] [Accepted: 08/23/2012] [Indexed: 12/15/2022]
Abstract
OBJECTIVE First, we give an overview of child psychiatric research in the Generation R Study, a population-based cohort from fetal life forward. Second, we examine within Generation R whether the functional polymorphism (5-HTTLPR) in the promoter of the serotonin transporter gene interacts with prenatal maternal chronic difficulties, prenatal maternal anxiety or postnatal maternal anxiety to influence child emotional development. METHOD A total of 2,136 northern European children were genotyped for 5-HTTLPR and rs25531. Mothers reported chronic difficulties and anxiety symptoms at 20 weeks' pregnancy and when the child was 3 years old. Child emotion recognition was observed at 3 years, and child emotional problems were assessed with the CBCL/1½-5 at 5 years. RESULTS There were consistent main effects of maternal difficulties and anxiety on child emotional problems, but no main effect of 5-HTTLPR. Moreover, children with the s allele were at increased risk for emotional problems if their mothers reported prenatal anxiety symptoms (β = 2.02, p < .001) or postnatal anxiety symptoms (β = 1.64, p < 0.001). Also, in children of mothers with prenatal anxiety symptoms, the s allele was associated with less accurate emotion-matching (β = -0.11, p = .004). CONCLUSIONS This population-based study shows that vulnerability due to 5-HTTLPR is not specific for certain adverse exposures or severe events, but suggests that the small effects of gene-environment interaction on emotional development become manifest early in life.
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Affiliation(s)
- Henning Tiemeier
- Erasmus Medical Center (MC)-Sophia Children's Hospital, Rotterdam, and the Generation R Study Group at Erasmus MC, Rotterdam.
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Törzsök P, Szekely E, Riesz P, Korompay A, Szekely T, Lotz G, Romics I, Timár J, Schaff Z, Kiss A. 7118 POSTER Expression of Claudins and Their Prognostic Significance in Non-invasive Urothelial Neoplasms of the Human Urinary Bladder. Eur J Cancer 2011. [DOI: 10.1016/s0959-8049(11)72033-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Törzsök P, Riesz P, Kenessey I, Szekely E, Somoracz A, Nyirády P, Romics I, Schaff Z, Lotz G, Kiss A. 7117 POSTER Claudins and Ki-67 – Potential Markers to Differentiate Low and High Grade Transitional Cell Carcinomas of the Urinary Bladder. Eur J Cancer 2011. [DOI: 10.1016/s0959-8049(11)72032-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Szekely E. Hepatocellular carcinoma with lymphoid stroma: ‘lymphoepithelioma-like carcinoma’? Histopathology 2008. [DOI: 10.1111/j.1365-2559.2001.1301a.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Fuszek P, Horvath HC, Speer G, Papp J, Haller P, Fischer S, Halasz J, Jaray B, Szekely E, Schaff Z, Papp A, Bursics A, Harsanyi L, Lukovich P, Kupcsulik P, Hitre E, Lakatos PL. Location and age at onset of colorectal cancer in Hungarian patients between 1993 and 2004. The high number of advanced cases supports the need for a colorectal cancer screening program in Hungary. Anticancer Res 2006; 26:527-31. [PMID: 16739314] [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: 05/09/2023]
Abstract
BACKGROUND In recent decades, the incidence of proximal colorectal cancer (CRC) in North America and Western Europe has steadily increased, while that of the distal tumors has shown a corresponding decrease. Our aim was to investigate the change in age at diagnosis, the gender, location and cancer stage of CRC cases over the last 12 years in a large number of Hungarian patients. PATIENTS AND METHODS The clinical and histological data of 1694 CRC patients (M/F: 917/777, age at diagnosis: 65.2 +/- SD 12.5 years), diagnosed at the First Department of Medicine and the First Department of Surgery of Semmelweis University, Budapest, Hungary, between January 1, 1993 and December 31, 2004, were analyzed retrospectively. RESULTS CRCs were rectal or left-sided in 70% and proximal (transverse, ascending or cecum) in 30% of the cases. The proportion of rectal carcinomas increased over the observed period (1993-1998: 31.6% vs. 1999-2004: 42.1%, p=0.001), while the proportion of proximal tumors remained stable. Eleven percent of CRCs were diagnosed under the age of 50 years. The age at diagnosis did not differ between males and females, but was lower in patients with rectal tumors compared to other localizations (p=0.02); 75.7% of the CRCs were T3-T4 at diagnosis and lymph node metastases could be detected in 47.7%. CONCLUSION In contrast to Western European and North American trends, the proportion of proximal CRCs did not increase in Hungary over the observed period. Almost two-thirds of all cancers were left-sided. The high percentage of locally advanced tumors and lymph node metastases supports the need for colorectal screening programs.
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Affiliation(s)
- Peter Fuszek
- First Department of Medicine, Semmelweis University, Budapest, Hungary.
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Abstract
INTRODUCTION We performed a retrospective study of tooth removal for patients with coagulation disorders. MATERIAL AND METHOD The study included 67 patients divided into 3 groups according to their coagulation disorder. The first group included 31 patients with a congenital disorder, the second 19 patients receiving anticoagulant therapy, and the third 16 patients with an acquired disorder. The same surgical procedure was used for all patients: alveoli regulation, socket preparation with resorbable oxycellulose dressing, and sutures with separate stitches. Biological glue and celluloid splints were not used. Depending on the severity of the coagulation disorder, factor VIII or concentrated von Willebrand factor or Desmopressine was administered for patients in the first group. If possible, low-molecular-weight heparin replaced oral anticoagulation for patients in the second group. Platelet concentrates were administered for 2 of the patients in the third group. RESULTS Postoperative bleeding was noted in 4 patients in the first group, 2 in the second and 2 in the third. DISCUSSION We have abandoned the use of biological glue and celluloid splints. The rate of bleeding in the first and second group was similar to that reported in the literature. We were unable to find any comparable report for the third group.
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Affiliation(s)
- E Szekely
- Service de Stomatologie et Chirurgie Maxillo-Faciale, Hôpital Roger Salengro, bd du Pr J. Leclercq, 59037 Lille Cedex
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Fuszek P, Horvath H, Papp J, Halasz J, Jaray B, Szekely E, Schaff Z, Papp A, Bursics A, Harsanyi L, Lukovich P, Kupcsulik P, Lakatos P. No change in location of colorectal cancer between 1993–2004 in Hungarian patients. Z Gastroenterol 2005. [DOI: 10.1055/s-2005-869675] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Maitra B, Szekely E, Gjini K, Laughlin MJ, Dennis J, Haynesworth SE, Koç ON. Human mesenchymal stem cells support unrelated donor hematopoietic stem cells and suppress T-cell activation. Bone Marrow Transplant 2004; 33:597-604. [PMID: 14716336 DOI: 10.1038/sj.bmt.1704400] [Citation(s) in RCA: 311] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Bone marrow-derived mesenchymal stem cells (MSCs) are known to interact with hematopoietic stem cells (HSCs) and immune cells, and represent potential cellular therapy to enhance allogeneic hematopoietic engraftment and prevent graft-versus-host disease (GVHD). We investigated the role of human MSCs in NOD-SCID mice repopulation by unrelated human hematopoietic cells and studied the immune interactions between human MSCs and unrelated donor blood cells in vitro. When hematopoietic stem cell numbers were limited, human engraftment of NOD-SCID mice was observed only after coinfusion of unrelated human MSCs, but not with coinfusion of mouse mesenchymal cell line. Unrelated human MSCs did not elicit T-cell activation in vitro and suppressed T-cell activation by Tuberculin and unrelated allogeneic lymphocytes in a dose-dependent manner. Cell-free MSC culture supernatant, mouse stromal cells and human dermal fibroblasts did not elicit this effect. These preclinical data suggest that unrelated, human bone marrow-derived, culture-expanded MSCs may improve the outcome of allogeneic transplantation by promoting hematopoietic engraftment and limiting GVHD and their therapeutic potential should be tested in clinic.
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Affiliation(s)
- B Maitra
- Comprehensive Cancer Center, Case Western Reserve University, University Hospitals of Cleveland, Cleveland, OH 44106, USA
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Kulka J, Szekely E, Gyorffy H, Kovacs M, Rusz Z, Perner F, Lukovich P, Dank M. Angiosarcoma of the breast: a propos three cases. EJC Suppl 2004. [DOI: 10.1016/s1359-6349(04)90908-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Szekely E, Schaff Z. Angiomyolipoma of the liver. Histopathology 2001; 39:213. [PMID: 11493341 DOI: 10.1046/j.1365-2559.2001.1232b.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Szekely E, Belford HG, Greer CL. Intron sequence and structure requirements for tRNA splicing in Saccharomyces cerevisiae. J Biol Chem 1988; 263:13839-47. [PMID: 2843539] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Predicted single-stranded structure at the 3' splice site is a conserved feature among intervening sequences (IVSs) in eukaryotic nuclear tRNA precursors. The role of 3' splice site structure in splicing was examined through hexanucleotide insertions at a central intron position in the Saccharomyces cerevisiae tRNA gene. These insertions were designed to alter the structure at the splice site without changing its sequence. Endonuclease cleavage of pre-tRNA substrates was then measured in vitro, and suppressor activity was examined in vivo. A precursor with fully double-stranded structure at the 3' splice site was not cleaved by endonuclease. The introduction of one unpaired nucleotide at the 3' splice site was sufficient to restore cleavage, although at a reduced rate. We have also observed that guanosine at the antepenultimate position provides a second consensus feature among IVSs in tRNA precursors. Point mutations at this position were found to affect splicing although there was no specific requirement for guanosine. These and previous results suggest that elements of secondary and/or tertiary structure at the 3' end of IVSs are primary determinants in pre-tRNA splice site utilization whereas specific sequence requirements are limited.
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Affiliation(s)
- E Szekely
- Department of Biological Chemistry, California College of Medicine, University of California, Irvine 92717
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Szekely E. Complexometric determination of citric acid with copper. Talanta 1985; 32:153-4. [DOI: 10.1016/0039-9140(85)80047-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/1984] [Revised: 06/14/1984] [Accepted: 09/14/1984] [Indexed: 11/16/2022]
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Szekely E, Montgomery DL. Glucose represses transcription of Saccharomyces cerevisiae nuclear genes that encode mitochondrial components. Mol Cell Biol 1984; 4:939-46. [PMID: 6328277 PMCID: PMC368844 DOI: 10.1128/mcb.4.5.939-946.1984] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
By Northern blot hybridization analysis, we demonstrated that the steady-state levels of mRNAs specifying the alpha subunit of ATPase, the beta subunit of ATPase, and the ATP/ADP translocator are all reduced in cells grown in glucose-rich medium. The extent to which glucose represses the levels of alpha, beta, and translocator mRNAs varies from strain to strain, from 2.5- to 7-fold. Furthermore, by hybridization experiments with an excess of DNA, we showed that glucose represses the rates of synthesis of these mRNAs. The kinetics of repression and depression of transcription were also studied. Finally, a mutant was characterized which appears to be defective in depression of transcription of the genes encoding the alpha and beta ATPase subunits as well as the ATP/ADP translocator.
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Abstract
A variety of factors, including phase variation, are involved in the regulation of flagellin gene expression in Salmonella sp. Flagellar-phase variation refers to the alternate expression of two different flagellin genes, H1 and H2. Site-specific inversion of a DNA segment adjacent to the H2 gene is responsible for switching expression. The segment includes the H2 promoter as well as the hin gene, which is required to mediate the inversion. Sequences in this region have homology with the corresponding sequences adjacent to the H1 flagellin gene in Salmonella sp. and the hag flagellin gene in Escherichia coli. The hin gene has also been shown to be homologous to the gin gene, which is found on bacteriophage Mu. To understand gene expression and the origin of these relationships, we have compared the DNA sequence adjacent to all three flagellin genes. The sequence data suggest a mechanism for the evolution of the hin-H2 locus.
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Szekely E, Simon M. Homology between the invertible deoxyribonucleic acid sequence that controls flagellar-phase variation in Salmonella sp. and deoxyribonucleic acid sequences in other organisms. J Bacteriol 1981; 148:829-36. [PMID: 6273384 PMCID: PMC216281 DOI: 10.1128/jb.148.3.829-836.1981] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
The invertible deoxyribonucleic acid (DNA) segment cloned from Salmonella sp. was radioactively labeled and used as a probe to search for homologous sequences by Southern hybridization. Only one copy of the invertible segment could be found on the Salmonella sp. genome. Partial sequence homology with the invertible region was detected in bacteriophage Mu and P1 DNA by low-stringency hybridization. Under these conditions, no homology was detected with Escherichia coli DNA. A strain of Salmonella sp. defective in phase variation carrying the vH2- allele was also analyzed by DNA-DNA hybridization. The results show that there is sequence divergence between diphasic and vH2- strains within the invertible sequence.
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Szekely E. A philosophy of clinical education. Aust Nurses J 1981; 11:51-2. [PMID: 6914170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Wolf G, Szekely E, Reinold E, Kucera H. [Development of the ultrasonic and x-ray diagnostic services at the Vienna University Women's Clinic]. Wien Med Wochenschr 1980; 130:581-5. [PMID: 7467372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Lucas JJ, Zorn GA, Brings A, Szekely E, Kates JR. Recent developments with karyoplast regeneration and nuclear transplantation. Natl Cancer Inst Monogr 1978:37-44. [PMID: 748759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Karyoplasts and cytoplasts prepared by cytochalasin-induced enucleation techniques were used in the development of systems for large-scale nuclear transplantation and the regeneration of karyoplasts to reform whole viable cells. Ten to 20% of a preparation of mouse L929 karyoplasts remained viable. These bodies, purified from whole cells, cytoplasts, and nonviable karyoplats, contained less than 10% of the cytoplasm in whole cells. By the technique of mass nuclear transplantation, up to 40% of a culture of cytoplasts could be renucleated by fusion of karyoplasts to a monolayer of enucleated cells. More than 5 x 10(5) renucleated or true cytoplasmic-nuclear hybrid cells could be prepared from a single cytoplast monolayer culture.
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Wolf G, Kucera H, Ulm R, Kubista E, Müller-Tyl E, Szekely E. [Experiences with mammography, plate thermography and cytology as triple diagnosis]. Strahlentherapie 1976; 152:248-53. [PMID: 968924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A report is given on 814 patients who had undergone a mamma examination by means of mammographies, plate thermographies, and, if indicated, punction cytologies. On the basis of our experiences with this triple diagnosis we drafted a preliminary control scheme.
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Kucera H, Kubista E, Müller-Tyl E, Reinold E, Wolf G, Szekely E. [The place of plate thermography in the diagnosis of breast cancer (author's transl)]. Wien Klin Wochenschr 1976; 88:25-9. [PMID: 960697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A report is presented of 319 unselected patients investigated by the method of plate thermography according to Tricoire, which is a comparatively new method in the diagnosis of breast cancer. 281 cases were additionally examined by mammography and those cases in whom malignancy was suspected underwent further cytological and histological investigation. The results of plate thermography and mammography are compared. The high degree of diagnostic accuracy achieved in the present series of cases by the use of plate thermography indicates that this procedure is not only a valable adjunct in the diagnosis of breast cancer but, moreover, seems to be recommendable as a screening method.
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Abstract
A technique for efficient cytochalasin-induced enucleation was used to prepare "karyoplasts"--nuclei surrounded by a thin shell of cytoplasm and an outer cell membrane. Methods for estimating the quantity of cytoplasm remaining in karyoplasts indicated that they contained less than 10% of the amount found in whole cells. Procedures for separating karyoplasts from contaminating cytoplasmic fragments and whole cells are also described. Freshly prepared L-cell karyoplasts were unable to adhere to and spread upon a surface. However, after incubation for several days, about 30% of the karyoplasts regained these abilities to some degree. A portion of the regenerating karyoplasts were then observed to divide. These events were confirmed and recorded by time-lapse cinematography. In addition, by culturing karyoplasts under appropriate conditions, clones were isolated.
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Wolf G, Wickenhauser J, Szekely E. [Electronic film analysis of nuclei of the fetal knee joint in amniotic shadows (author's transl)]. Rontgenblatter 1975; 28:491-5. [PMID: 1215758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Fetal shadows between LM IX and LM X were analysed with electronic film-improvement (harmonization). Altogether 108 nuclei of the knee joint were investigated. This techniques permits better and quicker analysis of pictures uhich at times are difficult to assess owing to overlapping. Addition radiographic exposures of mother and fetus can thus be avoided. Electronic improvement of films provides an important contribution to the reduction of exposure.
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Szekely E. Volumetric determination of primary arylamines and nitrites, using an internal indicator system. Talanta 1972; 19:1429-35. [DOI: 10.1016/0039-9140(72)80137-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/1971] [Revised: 05/01/1972] [Accepted: 05/19/1972] [Indexed: 11/16/2022]
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Szekely E. Colorimetric determination of nitrites with p-diaminodiphenylsulphone-diphen-ylamine as reagent. Talanta 1968; 15:795-801. [DOI: 10.1016/0039-9140(68)80172-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/1967] [Accepted: 01/16/1968] [Indexed: 10/18/2022]
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