1
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Ylikotila P, Sipilä J, Alapirtti T, Ahmasalo R, Koshimizu E, Miyatake S, Hurme-Niiranen A, Siitonen A, Doi H, Tanaka F, Matsumoto N, Majamaa K, Kytövuori L. Association of biallelic RFC1 expansion with early-onset Parkinson's disease. Eur J Neurol 2023; 30:1256-1261. [PMID: 36705320 DOI: 10.1111/ene.15717] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/19/2023] [Accepted: 01/23/2023] [Indexed: 01/28/2023]
Abstract
BACKGROUND AND PURPOSE The biallelic repeat expansion (AAGGG)exp in the replication factor C subunit 1 gene (RFC1) is a frequent cause of cerebellar ataxia, neuropathy and vestibular areflexia syndrome (CANVAS) as well as late-onset ataxia. The clinical spectrum of RFC1 disease has expanded since the first identification of biallelic (AAGGG)exp and includes now various nonclassical phenotypes. Biallelic (AAGGG)exp in RFC1 in patients with clinically confirmed Parkinson's disease (PD) has recently been found. METHODS A nationwide cohort of 273 Finnish patients with early-onset PD was examined for the biallelic intronic expansion in RFC1. The expansion (AAGGG)exp was first screened using extra long polymerase chain reactions (Extra Large-PCRs) and flanking multiplex PCR. The presence of biallelic (AAGGG)exp was then confirmed by repeat-primed PCR and, finally, the repeat length was determined by long-read sequencing. RESULTS Three patients were found with the biallelic (AAGGG)exp in RFC1 giving a frequency of 1.10% (0.23%-3.18%; 95% confidence interval). The three patients fulfilled the diagnostic criteria of PD, none of them had ataxia or neuropathy, and only one patient had a mild vestibular dysfunction. The age at onset of PD symptoms was 40-48 years and their disease course had been unremarkable apart from the early onset. CONCLUSIONS Our results suggest that (AAGGG)exp in RFC1 is a rare cause of early-onset PD. Other populations should be examined in order to determine whether our findings are specific to the Finnish population.
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Affiliation(s)
- Pauli Ylikotila
- Clinical Neurosciences, University of Turku, Turku, Finland.,Neurocenter Turku University Hospital, Turku, Finland
| | - Jussi Sipilä
- Clinical Neurosciences, University of Turku, Turku, Finland.,Department of Neurology, Siun Sote North Karelia Central Hospital, Joensuu, Finland
| | - Tiina Alapirtti
- Department of Neurology, Kanta-Häme Central Hospital, Hämeenlinna, Finland
| | - Riitta Ahmasalo
- Department of Neurology, Lapland Central Hospital, Rovaniemi, Finland
| | - Eriko Koshimizu
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Satoko Miyatake
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan.,Department of Clinical Genetics, Yokohama City University Hospital, Yokohama, Japan
| | - Anri Hurme-Niiranen
- Research Unit of Clinical Medicine, Medical Research Center Oulu, Oulu University Hospital, University of Oulu, Oulu, Finland.,Neurocenter, Neurology, Oulu University Hospital, Oulu, Finland
| | - Ari Siitonen
- Research Unit of Clinical Medicine, Medical Research Center Oulu, Oulu University Hospital, University of Oulu, Oulu, Finland.,Neurocenter, Neurology, Oulu University Hospital, Oulu, Finland
| | - Hiroshi Doi
- Department of Neurology and Stroke Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Fumiaki Tanaka
- Department of Neurology and Stroke Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Naomichi Matsumoto
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Kari Majamaa
- Research Unit of Clinical Medicine, Medical Research Center Oulu, Oulu University Hospital, University of Oulu, Oulu, Finland.,Neurocenter, Neurology, Oulu University Hospital, Oulu, Finland
| | - Laura Kytövuori
- Research Unit of Clinical Medicine, Medical Research Center Oulu, Oulu University Hospital, University of Oulu, Oulu, Finland.,Neurocenter, Neurology, Oulu University Hospital, Oulu, Finland
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2
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Bowles KR, Pugh DA, Liu Y, Patel T, Renton AE, Bandres-Ciga S, Gan-Or Z, Heutink P, Siitonen A, Bertelsen S, Cherry JD, Karch CM, Frucht SJ, Kopell BH, Peter I, Park YJ, Charney A, Raj T, Crary JF, Goate AM. 17q21.31 sub-haplotypes underlying H1-associated risk for Parkinson's disease are associated with LRRC37A/2 expression in astrocytes. Mol Neurodegener 2022; 17:48. [PMID: 35841044 PMCID: PMC9284779 DOI: 10.1186/s13024-022-00551-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 06/21/2022] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Parkinson's disease (PD) is genetically associated with the H1 haplotype of the MAPT 17q.21.31 locus, although the causal gene and variants underlying this association have not been identified. METHODS To better understand the genetic contribution of this region to PD and to identify novel mechanisms conferring risk for the disease, we fine-mapped the 17q21.31 locus by constructing discrete haplotype blocks from genetic data. We used digital PCR to assess copy number variation associated with PD-associated blocks, and used human brain postmortem RNA-seq data to identify candidate genes that were then further investigated using in vitro models and human brain tissue. RESULTS We identified three novel H1 sub-haplotype blocks across the 17q21.31 locus associated with PD risk. Protective sub-haplotypes were associated with increased LRRC37A/2 copy number and expression in human brain tissue. We found that LRRC37A/2 is a membrane-associated protein that plays a role in cellular migration, chemotaxis and astroglial inflammation. In human substantia nigra, LRRC37A/2 was primarily expressed in astrocytes, interacted directly with soluble α-synuclein, and co-localized with Lewy bodies in PD brain tissue. CONCLUSION These data indicate that a novel candidate gene, LRRC37A/2, contributes to the association between the 17q21.31 locus and PD via its interaction with α-synuclein and its effects on astrocytic function and inflammatory response. These data are the first to associate the genetic association at the 17q21.31 locus with PD pathology, and highlight the importance of variation at the 17q21.31 locus in the regulation of multiple genes other than MAPT and KANSL1, as well as its relevance to non-neuronal cell types.
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Affiliation(s)
- Kathryn R. Bowles
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY USA
- Ronald M. Loeb Center for Alzheimer’s Disease, Icahn School of Medicine at Mount Sinai, New York, NY USA
| | - Derian A. Pugh
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY USA
- Ronald M. Loeb Center for Alzheimer’s Disease, Icahn School of Medicine at Mount Sinai, New York, NY USA
| | - Yiyuan Liu
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY USA
- Ronald M. Loeb Center for Alzheimer’s Disease, Icahn School of Medicine at Mount Sinai, New York, NY USA
| | - Tulsi Patel
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY USA
- Ronald M. Loeb Center for Alzheimer’s Disease, Icahn School of Medicine at Mount Sinai, New York, NY USA
| | - Alan E. Renton
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY USA
- Ronald M. Loeb Center for Alzheimer’s Disease, Icahn School of Medicine at Mount Sinai, New York, NY USA
| | - Sara Bandres-Ciga
- Laboratory of Neurogenetics, National Institute On Aging, National Institutes of Health, Bethesda, MD USA
| | - Ziv Gan-Or
- Department of Human Genetics, McGill University, Montréal, Québec Canada
- The Neuro (Montreal Neurological Institute-Hospital), McGill University, Montréal, Québec Canada
- Department of Neurology and Neurosurgery, McGill University, Montréal, Québec Canada
| | - Peter Heutink
- Department for Neurodegenerative Diseases, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
- German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany
| | - Ari Siitonen
- Institute of Clinical Medicine, Department of Neurology, University of Oulu, Oulu, Finland
- Department of Neurology and Medical Research Center, Oulu University Hospital, Oulu, Finland
| | - Sarah Bertelsen
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY USA
- Ronald M. Loeb Center for Alzheimer’s Disease, Icahn School of Medicine at Mount Sinai, New York, NY USA
| | - Jonathan D. Cherry
- Alzheimer’s Disease and CTE Center, Boston University, Boston University School of Medicine, Boston, MA USA
- Department of Neurology, Boston University School of Medicine, Boston, MA USA
- VA Boston Healthcare System, 150 S. Huntington Avenue, Boston, MA USA
- Department of Pathology and Laboratory Medicine, Boston University School of Medicine, Boston, MA USA
| | - Celeste M. Karch
- Department of Psychiatry, Washington University in St Louis, St. Louis, MO USA
| | - Steven J. Frucht
- Department of Neurology, Fresco Institute for Parkinson’s and Movement Disorders, New York University Langone, New York, NY USA
| | - Brian H. Kopell
- Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, NY USA
- Center for Neuromodulation, Icahn School of Medicine at Mount Sinai, New York, NY USA
| | - Inga Peter
- Icahn Genomics Institute, Icahn School of Medicine at Mount Sinai, New York, NY USA
- Institute for Exposomic Research, Icahn School of Medicine at Mount Sinai, New York, NY USA
| | - Y. J. Park
- Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, NY USA
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY USA
| | | | - Alexander Charney
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY USA
- Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, NY USA
- Icahn Genomics Institute, Icahn School of Medicine at Mount Sinai, New York, NY USA
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY USA
| | - Towfique Raj
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY USA
- Ronald M. Loeb Center for Alzheimer’s Disease, Icahn School of Medicine at Mount Sinai, New York, NY USA
- Icahn Genomics Institute, Icahn School of Medicine at Mount Sinai, New York, NY USA
- Estelle and Daniel Maggin Department of Neurology, Icahn School of Medicine at Mount Sinai, New York, NY USA
| | - John F. Crary
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY USA
- Ronald M. Loeb Center for Alzheimer’s Disease, Icahn School of Medicine at Mount Sinai, New York, NY USA
- Department of Pathology, Icahn School of Medicine at Mount Sinai, New York, NY USA
| | - A. M. Goate
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY USA
- Ronald M. Loeb Center for Alzheimer’s Disease, Icahn School of Medicine at Mount Sinai, New York, NY USA
- Icahn Genomics Institute, Icahn School of Medicine at Mount Sinai, New York, NY USA
- Estelle and Daniel Maggin Department of Neurology, Icahn School of Medicine at Mount Sinai, New York, NY USA
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3
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Lipponen J, Helisalmi S, Raivo J, Siitonen A, Doi H, Rusanen H, Lehtilahti M, Ryytty M, Laakso M, Tanaka F, Majamaa K, Kytövuori L. Molecular epidemiology of hereditary ataxia in Finland. BMC Neurol 2021; 21:382. [PMID: 34600502 PMCID: PMC8487109 DOI: 10.1186/s12883-021-02409-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 03/17/2021] [Accepted: 09/17/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The genetics of cerebellar ataxia is complex. Hundreds of causative genes have been identified, but only a few cause more than single cases. The spectrum of ataxia-causing genes differs considerably between populations. The aim of the study was to investigate the molecular epidemiology of ataxia in the Finnish population. PATIENTS AND METHODS All patients in hospital database were reviewed for the diagnosis of unspecified ataxia. Acquired ataxias and nongenetic ataxias such as those related to infection, trauma or stroke were excluded. Sixty patients with sporadic ataxia with unknown etiology and 36 patients with familial ataxia of unknown etiology were recruited in the study. Repeat expansions in the SCA genes (ATXN1, 2, 3, 7, 8/OS, CACNA1A, TBP), FXN, and RFC1 were determined. Point mutations in POLG, SPG7 and in mitochondrial DNA (mtDNA) were investigated. In addition, DNA from 8 patients was exome sequenced. RESULTS A genetic cause of ataxia was found in 33 patients (34.4%). Seven patients had a dominantly inherited repeat expansion in ATXN8/OS. Ten patients had mitochondrial ataxia resulting from mutations in nuclear mitochondrial genes POLG or RARS2, or from a point mutation m.8561C > G or a single deletion in mtDNA. Interestingly, five patients were biallelic for the recently identified pathogenic repeat expansion in RFC1. All the five patients presented with the phenotype of cerebellar ataxia, neuropathy, and vestibular areflexia (CANVAS). Moreover, screening of 54 patients with Charcot-Marie-Tooth neuropathy revealed four additional patients with biallelic repeat expansion in RFC1, but none of them had cerebellar symptoms. CONCLUSIONS Expansion in ATXN8/OS results in the majority of dominant ataxias in Finland, while mutations in RFC1 and POLG are the most common cause of recessive ataxias. Our results suggest that analysis of RFC1 should be included in the routine diagnostics of idiopathic ataxia and Charcot-Marie-Tooth polyneuropathy.
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Affiliation(s)
- Joonas Lipponen
- Research Unit of Clinical Neuroscience, Medical Research Center Oulu, Oulu University Hospital and University of Oulu, P.O. Box 5000, 90014, Oulu, Finland.,Department of Neurology, Oulu University Hospital, Oulu, Finland
| | - Seppo Helisalmi
- Institute of Clinical Medicine, Internal Medicine, University of Eastern Finland, Kuopio, Finland
| | - Joose Raivo
- Institute of Clinical Medicine, Internal Medicine, University of Eastern Finland, Kuopio, Finland
| | - Ari Siitonen
- Research Unit of Clinical Neuroscience, Medical Research Center Oulu, Oulu University Hospital and University of Oulu, P.O. Box 5000, 90014, Oulu, Finland.,Department of Neurology, Oulu University Hospital, Oulu, Finland
| | - Hiroshi Doi
- Department of Neurology and Stroke Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Harri Rusanen
- Research Unit of Clinical Neuroscience, Medical Research Center Oulu, Oulu University Hospital and University of Oulu, P.O. Box 5000, 90014, Oulu, Finland.,Department of Neurology, Oulu University Hospital, Oulu, Finland
| | - Maria Lehtilahti
- Research Unit of Clinical Neuroscience, Medical Research Center Oulu, Oulu University Hospital and University of Oulu, P.O. Box 5000, 90014, Oulu, Finland.,Department of Neurology, Oulu University Hospital, Oulu, Finland
| | - Mervi Ryytty
- Research Unit of Clinical Neuroscience, Medical Research Center Oulu, Oulu University Hospital and University of Oulu, P.O. Box 5000, 90014, Oulu, Finland.,Department of Neurology, Oulu University Hospital, Oulu, Finland
| | - Markku Laakso
- Institute of Clinical Medicine, Internal Medicine, University of Eastern Finland, Kuopio, Finland
| | - Fumiaki Tanaka
- Department of Neurology and Stroke Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Kari Majamaa
- Research Unit of Clinical Neuroscience, Medical Research Center Oulu, Oulu University Hospital and University of Oulu, P.O. Box 5000, 90014, Oulu, Finland.,Department of Neurology, Oulu University Hospital, Oulu, Finland
| | - Laura Kytövuori
- Research Unit of Clinical Neuroscience, Medical Research Center Oulu, Oulu University Hospital and University of Oulu, P.O. Box 5000, 90014, Oulu, Finland. .,Department of Neurology, Oulu University Hospital, Oulu, Finland.
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4
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Blauwendraat C, Iwaki H, Makarious MB, Bandres‐Ciga S, Leonard HL, Grenn FP, Lake J, Krohn L, Tan M, Kim JJ, Gibbs JR, Hernandez DG, Ruskey JA, Pihlstrøm L, Toft M, van Hilten JJ, Marinus J, Schulte C, Brockmann K, Sharma M, Siitonen A, Majamaa K, Eerola‐Rautio J, Tienari PJ, Grosset DG, Lesage S, Corvol J, Brice A, Wood N, Hardy J, Gan‐Or Z, Heutink P, Gasser T, Morris HR, Noyce AJ, Nalls MA, Singleton AB. Investigation of Autosomal Genetic Sex Differences in Parkinson's Disease. Ann Neurol 2021; 90:35-42. [PMID: 33901317 PMCID: PMC8422907 DOI: 10.1002/ana.26090] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 04/24/2021] [Accepted: 04/24/2021] [Indexed: 12/15/2022]
Abstract
OBJECTIVE Parkinson's disease (PD) is a complex neurodegenerative disorder. Men are on average ~ 1.5 times more likely to develop PD compared to women with European ancestry. Over the years, genomewide association studies (GWAS) have identified numerous genetic risk factors for PD, however, it is unclear whether genetics contribute to disease etiology in a sex-specific manner. METHODS In an effort to study sex-specific genetic factors associated with PD, we explored 2 large genetic datasets from the International Parkinson's Disease Genomics Consortium and the UK Biobank consisting of 13,020 male PD cases, 7,936 paternal proxy cases, 89,660 male controls, 7,947 female PD cases, 5,473 maternal proxy cases, and 90,662 female controls. We performed GWAS meta-analyses to identify distinct patterns of genetic risk contributing to disease in male versus female PD cases. RESULTS In total, 19 genomewide significant regions were identified and no sex-specific effects were observed. A high genetic correlation between the male and female PD GWAS were identified (rg = 0.877) and heritability estimates were identical between male and female PD cases (~ 20%). INTERPRETATION We did not detect any significant genetic differences between male or female PD cases. Our study does not support the notion that common genetic variation on the autosomes could explain the difference in prevalence of PD between males and females cases at least when considering the current sample size under study. Further studies are warranted to investigate the genetic architecture of PD explained by X and Y chromosomes and further evaluate environmental effects that could potentially contribute to PD etiology in male versus female patients. ANN NEUROL 2021;90:41-48.
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Affiliation(s)
- Cornelis Blauwendraat
- Laboratory of NeurogeneticsNational Institute on Aging, National Institutes of HealthBethesdaMD
| | - Hirotaka Iwaki
- Laboratory of NeurogeneticsNational Institute on Aging, National Institutes of HealthBethesdaMD
- Center for Alzheimer's and Related DementiasNational Institutes of HealthBethesdaMD
- Data Tecnica InternationalGlen EchoMD
| | - Mary B. Makarious
- Laboratory of NeurogeneticsNational Institute on Aging, National Institutes of HealthBethesdaMD
- Department of Clinical and Movement NeurosciencesUCL Queen Square Institute of NeurologyLondonUK
| | - Sara Bandres‐Ciga
- Laboratory of NeurogeneticsNational Institute on Aging, National Institutes of HealthBethesdaMD
| | - Hampton L. Leonard
- Laboratory of NeurogeneticsNational Institute on Aging, National Institutes of HealthBethesdaMD
- Center for Alzheimer's and Related DementiasNational Institutes of HealthBethesdaMD
- Data Tecnica InternationalGlen EchoMD
| | - Francis P. Grenn
- Laboratory of NeurogeneticsNational Institute on Aging, National Institutes of HealthBethesdaMD
| | - Julie Lake
- Laboratory of NeurogeneticsNational Institute on Aging, National Institutes of HealthBethesdaMD
| | - Lynne Krohn
- Department of Human GeneticsMcGill UniversityMontrealQCCanada
- The Neuro (Montreal Neurological Institute‐Hospital)McGill UniversityMontrealQCCanada
| | - Manuela Tan
- Department of Clinical and Movement NeurosciencesUCL Queen Square Institute of NeurologyLondonUK
- Department of NeurologyOslo University HospitalOsloNorway
| | - Jonggeol J. Kim
- Laboratory of NeurogeneticsNational Institute on Aging, National Institutes of HealthBethesdaMD
- Preventive Neurology Unit, Wolfson Institute of Preventive MedicineQueen Mary University of LondonLondonUK
| | - Jesse R. Gibbs
- Laboratory of NeurogeneticsNational Institute on Aging, National Institutes of HealthBethesdaMD
| | - Dena G. Hernandez
- Laboratory of NeurogeneticsNational Institute on Aging, National Institutes of HealthBethesdaMD
| | - Jennifer A. Ruskey
- Department of Human GeneticsMcGill UniversityMontrealQCCanada
- The Neuro (Montreal Neurological Institute‐Hospital)McGill UniversityMontrealQCCanada
| | | | - Mathias Toft
- Department of NeurologyOslo University HospitalOsloNorway
| | | | - Johan Marinus
- Department of NeurologyLeiden University Medical CenterLeidenThe Netherlands
| | - Claudia Schulte
- Hertie Institute for Clinical Brain ResearchUniversity of TübingenTübingenGermany
- German Center for Neurodegenerative Diseases (DZNE)TuebingenGermany
| | - Kathrin Brockmann
- Hertie Institute for Clinical Brain ResearchUniversity of TübingenTübingenGermany
- German Center for Neurodegenerative Diseases (DZNE)TuebingenGermany
| | - Manu Sharma
- Centre for Genetic Epidemiology, Institute for Clinical Epidemiology and Applied BiometryUniversity of TubingenTubingenGermany
| | - Ari Siitonen
- Research Unit of Clinical NeuroscienceUniversity of OuluOuluFinland
- Department of Neurology and Medical Research CenterOulu University HospitalOuluFinland
| | - Kari Majamaa
- Research Unit of Clinical NeuroscienceUniversity of OuluOuluFinland
- Department of Neurology and Medical Research CenterOulu University HospitalOuluFinland
| | - Johanna Eerola‐Rautio
- Department of NeurologyHelsinki University Hospital, and Molecular Neurology, Research Programs Unit, Biomedicum, University of HelsinkiHelsinkiFinland
| | - Pentti J. Tienari
- Department of NeurologyHelsinki University Hospital, and Molecular Neurology, Research Programs Unit, Biomedicum, University of HelsinkiHelsinkiFinland
| | - Donald G. Grosset
- Department of Neurology, Institute of Neurological SciencesQueen Elizabeth University HospitalGlasgowScotlandUK
| | - Suzanne Lesage
- Department of Neurology and GeneticsSorbonne Université, Paris Brain Institute ‐ Institut du Cerveau ‐ ICM, Assistance Publique Hôpitaux de Paris, Inserm, CNRSParisFrance
| | - Jean‐Christophe Corvol
- Department of Neurology and GeneticsSorbonne Université, Paris Brain Institute ‐ Institut du Cerveau ‐ ICM, Assistance Publique Hôpitaux de Paris, Inserm, CNRSParisFrance
| | - Alexis Brice
- Department of Neurology and GeneticsSorbonne Université, Paris Brain Institute ‐ Institut du Cerveau ‐ ICM, Assistance Publique Hôpitaux de Paris, Inserm, CNRSParisFrance
| | - Nick Wood
- Department of Clinical and Movement NeurosciencesUCL Queen Square Institute of NeurologyLondonUK
| | - John Hardy
- Department of Clinical and Movement NeurosciencesUCL Queen Square Institute of NeurologyLondonUK
| | - Ziv Gan‐Or
- Department of Human GeneticsMcGill UniversityMontrealQCCanada
- The Neuro (Montreal Neurological Institute‐Hospital)McGill UniversityMontrealQCCanada
- Department of Neurology & NeurosurgeryMcGill UniversityMontrealQCCanada
| | - Peter Heutink
- Hertie Institute for Clinical Brain ResearchUniversity of TübingenTübingenGermany
- German Center for Neurodegenerative Diseases (DZNE)TuebingenGermany
| | - Thomas Gasser
- Hertie Institute for Clinical Brain ResearchUniversity of TübingenTübingenGermany
- German Center for Neurodegenerative Diseases (DZNE)TuebingenGermany
| | - Huw R. Morris
- Department of Clinical and Movement NeurosciencesUCL Queen Square Institute of NeurologyLondonUK
| | - Alastair J. Noyce
- Department of Clinical and Movement NeurosciencesUCL Queen Square Institute of NeurologyLondonUK
- Preventive Neurology Unit, Wolfson Institute of Preventive MedicineQueen Mary University of LondonLondonUK
| | - Mike A. Nalls
- Laboratory of NeurogeneticsNational Institute on Aging, National Institutes of HealthBethesdaMD
- Center for Alzheimer's and Related DementiasNational Institutes of HealthBethesdaMD
- Data Tecnica InternationalGlen EchoMD
| | - Andrew B. Singleton
- Laboratory of NeurogeneticsNational Institute on Aging, National Institutes of HealthBethesdaMD
- Center for Alzheimer's and Related DementiasNational Institutes of HealthBethesdaMD
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5
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Blauwendraat C, Reed X, Krohn L, Heilbron K, Bandres-Ciga S, Tan M, Gibbs JR, Hernandez DG, Kumaran R, Langston R, Bonet-Ponce L, Alcalay RN, Hassin-Baer S, Greenbaum L, Iwaki H, Leonard HL, Grenn FP, Ruskey JA, Sabir M, Ahmed S, Makarious MB, Pihlstrøm L, Toft M, van Hilten JJ, Marinus J, Schulte C, Brockmann K, Sharma M, Siitonen A, Majamaa K, Eerola-Rautio J, Tienari PJ, Pantelyat A, Hillis AE, Dawson TM, Rosenthal LS, Albert MS, Resnick SM, Ferrucci L, Morris CM, Pletnikova O, Troncoso J, Grosset D, Lesage S, Corvol JC, Brice A, Noyce AJ, Masliah E, Wood N, Hardy J, Shulman LM, Jankovic J, Shulman JM, Heutink P, Gasser T, Cannon P, Scholz SW, Morris H, Cookson MR, Nalls MA, Gan-Or Z, Singleton AB. Genetic modifiers of risk and age at onset in GBA associated Parkinson's disease and Lewy body dementia. Brain 2020; 143:234-248. [PMID: 31755958 DOI: 10.1093/brain/awz350] [Citation(s) in RCA: 121] [Impact Index Per Article: 30.3] [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: 08/16/2019] [Revised: 09/07/2019] [Accepted: 09/17/2019] [Indexed: 11/14/2022] Open
Abstract
Parkinson's disease is a genetically complex disorder. Multiple genes have been shown to contribute to the risk of Parkinson's disease, and currently 90 independent risk variants have been identified by genome-wide association studies. Thus far, a number of genes (including SNCA, LRRK2, and GBA) have been shown to contain variability across a spectrum of frequency and effect, from rare, highly penetrant variants to common risk alleles with small effect sizes. Variants in GBA, encoding the enzyme glucocerebrosidase, are associated with Lewy body diseases such as Parkinson's disease and Lewy body dementia. These variants, which reduce or abolish enzymatic activity, confer a spectrum of disease risk, from 1.4- to >10-fold. An outstanding question in the field is what other genetic factors that influence GBA-associated risk for disease, and whether these overlap with known Parkinson's disease risk variants. Using multiple, large case-control datasets, totalling 217 165 individuals (22 757 Parkinson's disease cases, 13 431 Parkinson's disease proxy cases, 622 Lewy body dementia cases and 180 355 controls), we identified 1691 Parkinson's disease cases, 81 Lewy body dementia cases, 711 proxy cases and 7624 controls with a GBA variant (p.E326K, p.T369M or p.N370S). We performed a genome-wide association study and analysed the most recent Parkinson's disease-associated genetic risk score to detect genetic influences on GBA risk and age at onset. We attempted to replicate our findings in two independent datasets, including the personal genetics company 23andMe, Inc. and whole-genome sequencing data. Our analysis showed that the overall Parkinson's disease genetic risk score modifies risk for disease and decreases age at onset in carriers of GBA variants. Notably, this effect was consistent across all tested GBA risk variants. Dissecting this signal demonstrated that variants in close proximity to SNCA and CTSB (encoding cathepsin B) are the most significant contributors. Risk variants in the CTSB locus were identified to decrease mRNA expression of CTSB. Additional analyses suggest a possible genetic interaction between GBA and CTSB and GBA p.N370S induced pluripotent cell-derived neurons were shown to have decreased cathepsin B expression compared to controls. These data provide a genetic basis for modification of GBA-associated Parkinson's disease risk and age at onset, although the total contribution of common genetics variants is not large. We further demonstrate that common variability at genes implicated in lysosomal function exerts the largest effect on GBA associated risk for disease. Further, these results have implications for selection of GBA carriers for therapeutic interventions.
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Affiliation(s)
- Cornelis Blauwendraat
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| | - Xylena Reed
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| | - Lynne Krohn
- Department of Human Genetics, McGill University, Montreal, Quebec, Canada.,Montreal Neurological Institute, McGill University, Montreal, Quebec, Canada
| | | | - Sara Bandres-Ciga
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| | - Manuela Tan
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK
| | - J Raphael Gibbs
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| | - Dena G Hernandez
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| | - Ravindran Kumaran
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| | - Rebekah Langston
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| | - Luis Bonet-Ponce
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| | - Roy N Alcalay
- Department of Neurology, College of Physicians and Surgeons, Columbia University, New York, NY, USA.,Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University, New York, NY, USA
| | - Sharon Hassin-Baer
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Department of Neurology, Sheba Medical Center, Tel Hashomer, Israel.,Movement Disorders Institute, Sheba Medical Center, Tel Hashomer, Israel.,The Joseph Sagol Neuroscience Center, Sheba Medical Center, Tel Hashomer, Israel
| | - Lior Greenbaum
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,The Joseph Sagol Neuroscience Center, Sheba Medical Center, Tel Hashomer, Israel.,The Danek Gertner Institute of Human Genetics, Sheba Medical Center, Tel Hashomer, Israel
| | - Hirotaka Iwaki
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| | - Hampton L Leonard
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| | - Francis P Grenn
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| | - Jennifer A Ruskey
- Department of Human Genetics, McGill University, Montreal, Quebec, Canada.,Montreal Neurological Institute, McGill University, Montreal, Quebec, Canada
| | - Marya Sabir
- Neurodegenerative Diseases Research Unit, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Sarah Ahmed
- Neurodegenerative Diseases Research Unit, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Mary B Makarious
- Neurodegenerative Diseases Research Unit, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Lasse Pihlstrøm
- Department of Neurology, Oslo University Hospital, Oslo, Norway
| | - Mathias Toft
- Department of Neurology, Oslo University Hospital, Oslo, Norway
| | - Jacobus J van Hilten
- Department of Neurology, Leiden University Medical Center, Leiden, The Netherlands
| | - Johan Marinus
- Department of Neurology, Leiden University Medical Center, Leiden, The Netherlands
| | - Claudia Schulte
- Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany.,German Center for Neurodegenerative Diseases (DZNE), Tuebingen, Germany
| | - Kathrin Brockmann
- Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany.,German Center for Neurodegenerative Diseases (DZNE), Tuebingen, Germany
| | - Manu Sharma
- Centre for Genetic Epidemiology, Institute for Clinical Epidemiology and Applied Biometry, University of Tubingen, Germany
| | - Ari Siitonen
- Institute of Clinical Medicine, Department of Neurology, University of Oulu, Oulu, Finland.,Department of Neurology and Medical Research Center, Oulu University Hospital, Oulu, Finland
| | - Kari Majamaa
- Institute of Clinical Medicine, Department of Neurology, University of Oulu, Oulu, Finland.,Department of Neurology and Medical Research Center, Oulu University Hospital, Oulu, Finland
| | - Johanna Eerola-Rautio
- Department of Neurology, Helsinki University Hospital, and Molecular Neurology, Research Programs Unit, Biomedicum, University of Helsinki, Helsinki, Finland
| | - Pentti J Tienari
- Department of Neurology, Helsinki University Hospital, and Molecular Neurology, Research Programs Unit, Biomedicum, University of Helsinki, Helsinki, Finland
| | | | - Alexander Pantelyat
- Neuroregeneration and Stem Cell Program, Institute for Cell Engineering, Johns Hopkins University Medical Center, Baltimore, MD, USA
| | - Argye E Hillis
- Neuroregeneration and Stem Cell Program, Institute for Cell Engineering, Johns Hopkins University Medical Center, Baltimore, MD, USA
| | - Ted M Dawson
- Neuroregeneration and Stem Cell Program, Institute for Cell Engineering, Johns Hopkins University Medical Center, Baltimore, MD, USA.,Department of Neurology, Johns Hopkins University Medical Center, Baltimore, MD, USA
| | - Liana S Rosenthal
- Department of Neurology, Johns Hopkins University Medical Center, Baltimore, MD, USA
| | - Marilyn S Albert
- Department of Neurology, Johns Hopkins University Medical Center, Baltimore, MD, USA
| | - Susan M Resnick
- Laboratory of Behavioral Neuroscience, National Institute on Aging, Baltimore, MD, USA
| | - Luigi Ferrucci
- Longitudinal Studies Section, National Institute on Aging, Baltimore, MD, USA
| | - Christopher M Morris
- Newcastle Brain Tissue Resource, Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, UK
| | - Olga Pletnikova
- Department of Pathology (Neuropathology, Johns Hopkins University Medical Center, Baltimore, MD, USA
| | - Juan Troncoso
- Department of Neurology, Johns Hopkins University Medical Center, Baltimore, MD, USA.,Department of Pathology (Neuropathology, Johns Hopkins University Medical Center, Baltimore, MD, USA
| | - Donald Grosset
- Department of Neurology, Institute of Neurological Sciences, Queen Elizabeth University Hospital, Glasgow, UK
| | - Suzanne Lesage
- Inserm U1127, Sorbonne Universités, UPMC Univ Paris 06 UMR S1127, Institut du Cerveau et de la Moelle épinière, ICM, Paris, France
| | - Jean-Christophe Corvol
- Inserm U1127, Sorbonne Universités, UPMC Univ Paris 06 UMR S1127, Institut du Cerveau et de la Moelle épinière, ICM, Paris, France
| | - Alexis Brice
- Inserm U1127, Sorbonne Universités, UPMC Univ Paris 06 UMR S1127, Institut du Cerveau et de la Moelle épinière, ICM, Paris, France
| | - Alastair J Noyce
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK.,Preventive Neurology Unit, Wolfson Institute of Preventive Medicine, Queen Mary University of London, London, UK
| | - Eliezer Masliah
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| | - Nick Wood
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK
| | - John Hardy
- Department of Neurodegenerative Diseases, UCL Queen Square Institute of Neurology, London, UK
| | - Lisa M Shulman
- Department of Neurology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Joseph Jankovic
- Department of Neurology, Baylor College of Medicine, Houston, USA
| | - Joshua M Shulman
- Department of Neurology, Baylor College of Medicine, Houston, USA.,Departments of Molecular and Human Genetics and Neuroscience, Baylor College of Medicine, Houston, USA.,Jan and Dan Duncan Neurological Research Institute, Texas Children's Hospital, Houston, USA
| | - Peter Heutink
- Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany.,German Center for Neurodegenerative Diseases (DZNE), Tuebingen, Germany
| | - Thomas Gasser
- Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany.,German Center for Neurodegenerative Diseases (DZNE), Tuebingen, Germany
| | | | - Sonja W Scholz
- Neurodegenerative Diseases Research Unit, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA.,Department of Neurology, Johns Hopkins University Medical Center, Baltimore, MD, USA
| | - Huw Morris
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK
| | - Mark R Cookson
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| | - Mike A Nalls
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA.,Data Tecnica International, Glen Echo, MD, USA
| | - Ziv Gan-Or
- Department of Human Genetics, McGill University, Montreal, Quebec, Canada.,Montreal Neurological Institute, McGill University, Montreal, Quebec, Canada.,Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada
| | - Andrew B Singleton
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
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Yang M, Petralia F, Li Z, Li H, Ma W, Song X, Kim S, Lee H, Yu H, Lee B, Bae S, Heo E, Kaczmarczyk J, Stępniak P, Warchoł M, Yu T, Calinawan AP, Boutros PC, Payne SH, Reva B, Boja E, Rodriguez H, Stolovitzky G, Guan Y, Kang J, Wang P, Fenyö D, Saez-Rodriguez J, Aderinwale T, Afyounian E, Agrawal P, Ali M, Amadoz A, Azuaje F, Bachman J, Bae S, Bhalla S, Carbonell-Caballero J, Chakraborty P, Chaudhary K, Choi Y, Choi Y, Çubuk C, Dhanda SK, Dopazo J, Elo LL, Fóthi Á, Gevaert O, Granberg K, Greiner R, Heo E, Hidalgo MR, Jayaswal V, Jeon H, Jeon M, Kalmady SV, Kambara Y, Kang J, Kang K, Kaoma T, Kaur H, Kazan H, Kesar D, Kesseli J, Kim D, Kim K, Kim SY, Kim S, Kumar S, Lee B, Lee H, Liu Y, Luethy R, Mahajan S, Mahmoudian M, Muller A, Nazarov PV, Nguyen H, Nykter M, Okuda S, Park S, Pal Singh Raghava G, Rajapakse JC, Rantapero T, Ryu H, Salavert F, Saraei S, Sharma R, Siitonen A, Sokolov A, Subramanian K, Suni V, Suomi T, Tranchevent LC, Usmani SS, Välikangas T, Vega R, Zhong H. Community Assessment of the Predictability of Cancer Protein and Phosphoprotein Levels from Genomics and Transcriptomics. Cell Syst 2020; 11:186-195.e9. [DOI: 10.1016/j.cels.2020.06.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 03/12/2020] [Accepted: 06/29/2020] [Indexed: 10/23/2022]
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7
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Nalls MA, Blauwendraat C, Vallerga CL, Heilbron K, Bandres-Ciga S, Chang D, Tan M, Kia DA, Noyce AJ, Xue A, Bras J, Young E, von Coelln R, Simón-Sánchez J, Schulte C, Sharma M, Krohn L, Pihlstrøm L, Siitonen A, Iwaki H, Leonard H, Faghri F, Gibbs JR, Hernandez DG, Scholz SW, Botia JA, Martinez M, Corvol JC, Lesage S, Jankovic J, Shulman LM, Sutherland M, Tienari P, Majamaa K, Toft M, Andreassen OA, Bangale T, Brice A, Yang J, Gan-Or Z, Gasser T, Heutink P, Shulman JM, Wood NW, Hinds DA, Hardy JA, Morris HR, Gratten J, Visscher PM, Graham RR, Singleton AB. Identification of novel risk loci, causal insights, and heritable risk for Parkinson's disease: a meta-analysis of genome-wide association studies. Lancet Neurol 2019; 18:1091-1102. [PMID: 31701892 PMCID: PMC8422160 DOI: 10.1016/s1474-4422(19)30320-5] [Citation(s) in RCA: 1095] [Impact Index Per Article: 219.0] [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] [Received: 04/27/2019] [Revised: 07/19/2019] [Accepted: 07/29/2019] [Indexed: 12/16/2022]
Abstract
BACKGROUND Genome-wide association studies (GWAS) in Parkinson's disease have increased the scope of biological knowledge about the disease over the past decade. We aimed to use the largest aggregate of GWAS data to identify novel risk loci and gain further insight into the causes of Parkinson's disease. METHODS We did a meta-analysis of 17 datasets from Parkinson's disease GWAS available from European ancestry samples to nominate novel loci for disease risk. These datasets incorporated all available data. We then used these data to estimate heritable risk and develop predictive models of this heritability. We also used large gene expression and methylation resources to examine possible functional consequences as well as tissue, cell type, and biological pathway enrichments for the identified risk factors. Additionally, we examined shared genetic risk between Parkinson's disease and other phenotypes of interest via genetic correlations followed by Mendelian randomisation. FINDINGS Between Oct 1, 2017, and Aug 9, 2018, we analysed 7·8 million single nucleotide polymorphisms in 37 688 cases, 18 618 UK Biobank proxy-cases (ie, individuals who do not have Parkinson's disease but have a first degree relative that does), and 1·4 million controls. We identified 90 independent genome-wide significant risk signals across 78 genomic regions, including 38 novel independent risk signals in 37 loci. These 90 variants explained 16-36% of the heritable risk of Parkinson's disease depending on prevalence. Integrating methylation and expression data within a Mendelian randomisation framework identified putatively associated genes at 70 risk signals underlying GWAS loci for follow-up functional studies. Tissue-specific expression enrichment analyses suggested Parkinson's disease loci were heavily brain-enriched, with specific neuronal cell types being implicated from single cell data. We found significant genetic correlations with brain volumes (false discovery rate-adjusted p=0·0035 for intracranial volume, p=0·024 for putamen volume), smoking status (p=0·024), and educational attainment (p=0·038). Mendelian randomisation between cognitive performance and Parkinson's disease risk showed a robust association (p=8·00 × 10-7). INTERPRETATION These data provide the most comprehensive survey of genetic risk within Parkinson's disease to date, to the best of our knowledge, by revealing many additional Parkinson's disease risk loci, providing a biological context for these risk factors, and showing that a considerable genetic component of this disease remains unidentified. These associations derived from European ancestry datasets will need to be followed-up with more diverse data. FUNDING The National Institute on Aging at the National Institutes of Health (USA), The Michael J Fox Foundation, and The Parkinson's Foundation (see appendix for full list of funding sources).
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Affiliation(s)
- Mike A Nalls
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA; Data Tecnica International, Glen Echo, MD, USA.
| | - Cornelis Blauwendraat
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| | - Costanza L Vallerga
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia
| | | | - Sara Bandres-Ciga
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| | - Diana Chang
- Department of Human Genetics, Genentech, South San Francisco, CA, USA
| | - Manuela Tan
- Department of Molecular Neuroscience, UCL Queen Square Institute of Neurology, London, UK; Department of Clinical and Movement Neuroscience and UCL Movement Disorders Centre, UCL Queen Square Institute of Neurology, London, UK
| | - Demis A Kia
- Department of Molecular Neuroscience, UCL Queen Square Institute of Neurology, London, UK; Department of Clinical and Movement Neuroscience and UCL Movement Disorders Centre, UCL Queen Square Institute of Neurology, London, UK
| | - Alastair J Noyce
- Department of Molecular Neuroscience, UCL Queen Square Institute of Neurology, London, UK; Preventive Neurology Unit, Wolfson Institute of Preventive Medicine, Queen Mary University of London, London, UK
| | - Angli Xue
- Queensland Brain Institute, The University of Queensland, Brisbane, QLD, Australia; Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia
| | - Jose Bras
- Department of Neurodegenerative Diseases, UCL Queen Square Institute of Neurology, London, UK; Center for Neurodegenerative Science, Van Andel Research Institute, Grand Rapids, MI, USA
| | - Emily Young
- Department of Neurology, Baylor College of Medicine, Houston, TX, USA
| | - Rainer von Coelln
- Department of Neurology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Javier Simón-Sánchez
- Department for Neurodegenerative Diseases, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany; German Center for Neurodegenerative Diseases, Tübingen, Germany
| | - Claudia Schulte
- Department for Neurodegenerative Diseases, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany; German Center for Neurodegenerative Diseases, Tübingen, Germany
| | - Manu Sharma
- Centre for Genetic Epidemiology, Institute for Clinical Epidemiology and Applied Biometry, University of Tübingen, Tübingen, Germany
| | - Lynne Krohn
- Department of Human Genetics, McGill University, Montreal, QC, Canada; Montreal Neurological Institute, McGill University, Montreal, QC, Canada
| | - Lasse Pihlstrøm
- Department of Neurology, Oslo University Hospital, Oslo, Norway
| | - Ari Siitonen
- Institute of Clinical Medicine, Department of Neurology, University of Oulu, Oulu, Finland; Department of Neurology and Medical Research Center, Oulu University Hospital, Oulu, Finland
| | - Hirotaka Iwaki
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA; Data Tecnica International, Glen Echo, MD, USA; The Michael J Fox Foundation, New York, NY, USA
| | - Hampton Leonard
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA; Data Tecnica International, Glen Echo, MD, USA
| | - Faraz Faghri
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA; Department of Computer Science, University of Illinois Urbana-Champaign, Champaign, IL, USA
| | - J Raphael Gibbs
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| | - Dena G Hernandez
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| | - Sonja W Scholz
- National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA; Department of Neurology, Johns Hopkins University Medical Center, Baltimore, MD, USA
| | - Juan A Botia
- Department of Molecular Neuroscience, UCL Queen Square Institute of Neurology, London, UK; Departamento de Ingeniería de la Información y las Comunicaciones, Universidad de Murcia, Spain
| | - Maria Martinez
- Institut national de la santé et de la recherche médicale Unité mixte de recherche 1220, Toulouse, France; Paul Sabatier University, Toulouse, France
| | - Jean-Christophe Corvol
- Institut national de la santé et de la recherche médicale U1127, CNRS UMR 7225, Paris, France; Sorbonne Université centre national de la recherche médicale, unité mixte de recherche 1127, Paris, France; Assistance Publique Hôpitaux de Paris, Paris, France; Institut du Cerveau et de la Moelle épinière, Paris, France
| | - Suzanne Lesage
- Institut national de la santé et de la recherche médicale U1127, CNRS UMR 7225, Paris, France; Sorbonne Université centre national de la recherche médicale, unité mixte de recherche 1127, Paris, France; Assistance Publique Hôpitaux de Paris, Paris, France; Institut du Cerveau et de la Moelle épinière, Paris, France
| | - Joseph Jankovic
- Department of Neurology, Baylor College of Medicine, Houston, TX, USA
| | - Lisa M Shulman
- Department of Neurology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Margaret Sutherland
- National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Pentti Tienari
- Clinical Neurosciences, Neurology, University of Helsinki, Helsinki, Finland; Helsinki University Hospital, Helsinki, Finland
| | - Kari Majamaa
- Institute of Clinical Medicine, Department of Neurology, University of Oulu, Oulu, Finland; Department of Neurology and Medical Research Center, Oulu University Hospital, Oulu, Finland
| | - Mathias Toft
- Department of Neurology, Oslo University Hospital, Oslo, Norway; Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Ole A Andreassen
- Division of Mental Health and Addiction, Oslo University Hospital, Oslo, Norway; Jebsen Centre for Psychosis Research, University of Oslo, Oslo, Norway
| | - Tushar Bangale
- Department of Human Genetics, Genentech, South San Francisco, CA, USA
| | - Alexis Brice
- Institut national de la santé et de la recherche médicale U1127, CNRS UMR 7225, Paris, France; Sorbonne Université centre national de la recherche médicale, unité mixte de recherche 1127, Paris, France; Assistance Publique Hôpitaux de Paris, Paris, France; Institut du Cerveau et de la Moelle épinière, Paris, France
| | - Jian Yang
- Queensland Brain Institute, The University of Queensland, Brisbane, QLD, Australia; Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia
| | - Ziv Gan-Or
- Department of Human Genetics, McGill University, Montreal, QC, Canada; Montreal Neurological Institute, McGill University, Montreal, QC, Canada; Department of Neurology and Neurosurgery, McGill University, Montreal, QC, Canada
| | - Thomas Gasser
- Department for Neurodegenerative Diseases, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany; German Center for Neurodegenerative Diseases, Tübingen, Germany
| | - Peter Heutink
- Department for Neurodegenerative Diseases, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany; German Center for Neurodegenerative Diseases, Tübingen, Germany
| | - Joshua M Shulman
- Department of Neurology, Baylor College of Medicine, Houston, TX, USA; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA; Department of Neuroscience, Baylor College of Medicine, Houston, TX, USA; Jan and Dan Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX, USA
| | - Nicholas W Wood
- Department of Molecular Neuroscience, UCL Queen Square Institute of Neurology, London, UK; Department of Clinical and Movement Neuroscience and UCL Movement Disorders Centre, UCL Queen Square Institute of Neurology, London, UK
| | | | - John A Hardy
- Department of Molecular Neuroscience, UCL Queen Square Institute of Neurology, London, UK
| | - Huw R Morris
- Department of Clinical and Movement Neuroscience and UCL Movement Disorders Centre, UCL Queen Square Institute of Neurology, London, UK
| | - Jacob Gratten
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia; Mater Research Institute, The University of Queensland, Brisbane, QLD, Australia
| | - Peter M Visscher
- Queensland Brain Institute, The University of Queensland, Brisbane, QLD, Australia; Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia
| | - Robert R Graham
- Department of Human Genetics, Genentech, South San Francisco, CA, USA
| | - Andrew B Singleton
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
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8
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Blauwendraat C, Heilbron K, Vallerga CL, Bandres-Ciga S, von Coelln R, Pihlstrøm L, Simón-Sánchez J, Schulte C, Sharma M, Krohn L, Siitonen A, Iwaki H, Leonard H, Noyce AJ, Tan M, Gibbs JR, Hernandez DG, Scholz SW, Jankovic J, Shulman LM, Lesage S, Corvol JC, Brice A, van Hilten JJ, Marinus J, Tienari P, Majamaa K, Toft M, Grosset DG, Gasser T, Heutink P, Shulman JM, Wood N, Hardy J, Morris HR, Hinds DA, Gratten J, Visscher PM, Gan-Or Z, Nalls MA, Singleton AB. Parkinson's disease age at onset genome-wide association study: Defining heritability, genetic loci, and α-synuclein mechanisms. Mov Disord 2019; 34:866-875. [PMID: 30957308 PMCID: PMC6579628 DOI: 10.1002/mds.27659] [Citation(s) in RCA: 204] [Impact Index Per Article: 40.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 01/02/2019] [Accepted: 01/21/2019] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Increasing evidence supports an extensive and complex genetic contribution to PD. Previous genome-wide association studies (GWAS) have shed light on the genetic basis of risk for this disease. However, the genetic determinants of PD age at onset are largely unknown. OBJECTIVES To identify the genetic determinants of PD age at onset. METHODS Using genetic data of 28,568 PD cases, we performed a genome-wide association study based on PD age at onset. RESULTS We estimated that the heritability of PD age at onset attributed to common genetic variation was ∼0.11, lower than the overall heritability of risk for PD (∼0.27), likely, in part, because of the subjective nature of this measure. We found two genome-wide significant association signals, one at SNCA and the other a protein-coding variant in TMEM175, both of which are known PD risk loci and a Bonferroni-corrected significant effect at other known PD risk loci, GBA, INPP5F/BAG3, FAM47E/SCARB2, and MCCC1. Notably, SNCA, TMEM175, SCARB2, BAG3, and GBA have all been shown to be implicated in α-synuclein aggregation pathways. Remarkably, other well-established PD risk loci, such as GCH1 and MAPT, did not show a significant effect on age at onset of PD. CONCLUSIONS Overall, we have performed the largest age at onset of PD genome-wide association studies to date, and our results show that not all PD risk loci influence age at onset with significant differences between risk alleles for age at onset. This provides a compelling picture, both within the context of functional characterization of disease-linked genetic variability and in defining differences between risk alleles for age at onset, or frank risk for disease. © 2019 International Parkinson and Movement Disorder Society.
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Affiliation(s)
- Cornelis Blauwendraat
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
- Neurodegenerative Diseases Research Unit, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Karl Heilbron
- 23andMe, Inc., 899 W Evelyn Avenue, Mountain View, CA, USA
| | - Costanza L. Vallerga
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Australia
| | - Sara Bandres-Ciga
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| | - Rainer von Coelln
- Department of Neurology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Lasse Pihlstrøm
- Department of Neurology, Oslo University Hospital, Oslo, Norway
| | - Javier Simón-Sánchez
- Department for Neurodegenerative Diseases, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
- German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany
| | - Claudia Schulte
- Department for Neurodegenerative Diseases, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
- German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany
| | - Manu Sharma
- Centre for Genetic Epidemiology, Institute for Clinical Epidemiology and Applied Biometry, University of Tubingen, Germany
| | - Lynne Krohn
- Department of Human Genetics, McGill University, Montreal, Quebec, Canada
- Montreal Neurological Institute, McGill University, Montreal, Quebec, Canada
| | - Ari Siitonen
- Institute of Clinical Medicine, Department of Neurology, University of Oulu, Oulu, Finland
- Department of Neurology and Medical Research Center, Oulu University Hospital, Oulu, Finland
| | - Hirotaka Iwaki
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
- The Michael J Fox Foundation for Parkinson’s Research, NY, USA
| | - Hampton Leonard
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| | - Alastair J. Noyce
- Preventive Neurology Unit, Wolfson Institute of Preventive Medicine, Queen Mary University of London, London, UK
- Department of Molecular Neuroscience, UCL Institute of Neurology, London, UK
| | - Manuela Tan
- Department of Molecular Neuroscience, UCL Institute of Neurology, London, UK
| | - J. Raphael Gibbs
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| | - Dena G. Hernandez
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| | - Sonja W. Scholz
- Neurodegenerative Diseases Research Unit, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Joseph Jankovic
- Department of Neurology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Lisa M. Shulman
- Department of Neurology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Suzanne Lesage
- Inserm U1127, Sorbonne Universités, UPMC Univ Paris 06 UMR S1127, Institut du Cerveau et de la Moelle épinière, ICM, Paris, France
| | - Jean-Christophe Corvol
- Inserm U1127, Sorbonne Universités, UPMC Univ Paris 06 UMR S1127, Institut du Cerveau et de la Moelle épinière, ICM, Paris, France
| | - Alexis Brice
- Inserm U1127, Sorbonne Universités, UPMC Univ Paris 06 UMR S1127, Institut du Cerveau et de la Moelle épinière, ICM, Paris, France
| | | | - Johan Marinus
- Department of Neurology, Leiden University Medical Center, Leiden, The Netherlands
| | | | - Pentti Tienari
- Institute of Clinical Medicine, Department of Neurology, University of Oulu, Oulu, Finland
- Department of Neurology and Medical Research Center, Oulu University Hospital, Oulu, Finland
| | - Kari Majamaa
- Institute of Clinical Medicine, Department of Neurology, University of Oulu, Oulu, Finland
- Department of Neurology and Medical Research Center, Oulu University Hospital, Oulu, Finland
| | - Mathias Toft
- Department of Neurology, Oslo University Hospital, Oslo, Norway
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Donald G. Grosset
- Department of Neurology, Institute of Neurological Sciences, Queen Elizabeth University Hospital, Glasgow, UK
- Institute of Neuroscience & Psychology, University of Glasgow, Glasgow, UK
| | - Thomas Gasser
- Department for Neurodegenerative Diseases, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
- German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany
| | - Peter Heutink
- Department for Neurodegenerative Diseases, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
- German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany
| | - Joshua M Shulman
- Departments of Molecular & Human Genetics and Neuroscience, Baylor College of Medicine, Houston, USA
- Jan and Dan Duncan Neurological Research Institute, Texas Children’s Hospital, Houston, USA
| | - Nicolas Wood
- Inserm U1127, Sorbonne Universités, UPMC Univ Paris 06 UMR S1127, Institut du Cerveau et de la Moelle épinière, ICM, Paris, France
| | - John Hardy
- Inserm U1127, Sorbonne Universités, UPMC Univ Paris 06 UMR S1127, Institut du Cerveau et de la Moelle épinière, ICM, Paris, France
| | - Huw R Morris
- Department of Clinical Neuroscience, UCL Institute of Neurology, London UK
- UCL Movement Disorders Centre, UCL Institute of Neurology, London, UK
| | - David A. Hinds
- 23andMe, Inc., 899 W Evelyn Avenue, Mountain View, CA, USA
| | - Jacob Gratten
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Australia
- Queensland Brain Institute, The University of Queensland, Brisbane, Australia
| | - Peter M. Visscher
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Australia
- Queensland Brain Institute, The University of Queensland, Brisbane, Australia
| | - Ziv Gan-Or
- Department of Human Genetics, McGill University, Montreal, Quebec, Canada
- Montreal Neurological Institute, McGill University, Montreal, Quebec, Canada
- Department of Neurology & Neurosurgery, McGill University, Montreal, Quebec, Canada
| | - Mike A. Nalls
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
- Data Tecnica International, Glen Echo, MD, USA
| | - Andrew B. Singleton
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
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9
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Nyholm O, Heinikainen S, Pelkonen S, Hallanvuo S, Haukka K, Siitonen A. Hybrids of Shigatoxigenic and Enterotoxigenic Escherichia coli (STEC/ETEC) Among Human and Animal Isolates in Finland. Zoonoses Public Health 2015; 62:518-24. [PMID: 25571907 DOI: 10.1111/zph.12177] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [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: 08/22/2014] [Indexed: 11/28/2022]
Abstract
Diarrhoeagenic Escherichia coli (DEC) cause serious foodborne infections in humans. Total of 450 Shigatoxigenic E. coli (STEC) strains isolated from humans, animals and environment in Finland were examined by multiplex PCR targeting the virulence genes of various DEC pathogroups simultaneously. One per cent (3/291) of the human STEC and 14% (22/159) of the animal and environmental STEC had genes typically present in enterotoxigenic E. coli (ETEC). The strains possessed genes encoding both Shiga toxin 1 and/or 2 (stx1 and/or stx2 ) and ETEC-specific heat-stable (ST) enterotoxin Ia (estIa). The identified stx subtypes were stx1a, stx1c, stx2a, stx2d and stx2g. The three human STEC/ETEC strains were isolated from the patients with haemolytic uraemic syndrome and diarrhoea and from an asymptomatic carrier. The animal STEC/ETEC strains were isolated from cattle and moose. The human and animal STEC/ETEC strains belonged to 11 serotypes, of which O2:H27, O15:H16, O101:H-, O128:H8 and O141:H8 have previously been described to be associated with human disease. Identification of multiple virulence genes offers further information for assessing the virulence potential of STEC and other DEC. The emergence of novel hybrid pathogens should be taken into account in the patient care and epidemiological surveillance.
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Affiliation(s)
- O Nyholm
- Bacteriology Unit, National Institute for Health and Welfare (THL), Helsinki, Finland
| | - S Heinikainen
- Veterinary Bacteriology Research Unit, Finnish Food Safety Authority Evira, Kuopio, Finland
| | - S Pelkonen
- Veterinary Bacteriology Research Unit, Finnish Food Safety Authority Evira, Kuopio, Finland
| | - S Hallanvuo
- Food and Feed Microbiology Research Unit, Finnish Food Safety Authority Evira, Helsinki, Finland
| | - K Haukka
- Bacteriology Unit, National Institute for Health and Welfare (THL), Helsinki, Finland.,Department of Food and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - A Siitonen
- Bacteriology Unit, National Institute for Health and Welfare (THL), Helsinki, Finland
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10
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Siitonen A, Majounie E, Federoff M, Ding J, Majamaa K, Singleton AB. Mutations in EIF4G1 are not a common cause of Parkinson's disease. Eur J Neurol 2013; 20:e59. [PMID: 23490116 DOI: 10.1111/ene.12051] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2012] [Accepted: 10/31/2012] [Indexed: 11/26/2022]
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11
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Vasala M, Hallanvuo S, Ruuska P, Suokas R, Siitonen A, Hakala M. High frequency of reactive arthritis in adults after Yersinia pseudotuberculosis O:1 outbreak caused by contaminated grated carrots. Ann Rheum Dis 2013; 73:1793-6. [PMID: 23852698 DOI: 10.1136/annrheumdis-2013-203431] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [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: 11/04/2022]
Abstract
OBJECTIVE We describe the epidemiological and microbiological process in the clearing of a foodborne outbreak of Yersinia pseudotuberculosis O:1 linked to raw carrots and frequency of the associated reactive extra-gastrointestinal manifestations. METHODS The patient samples were investigated by routine culture or antibody testing methods. The real-time bacterial PCR was used to detect Y pseudotuberculosis in samples from the grated carrots and in those taken from the carrot storage. Genotype of bacterial isolates was determined by pulsed-field gel electrophoresis. For case identification, we retrospectively looked over the laboratory files of the central hospital focusing on the time period of the outbreak. RESULTS Altogether 49 case patients were identified. Y pseudotuberculosis was detected by real-time PCR analysis in samples taken from grated carrots and from the carrot distributor. Bacterial isolates originating from the farm environment showed identical serotype (O:1) and genotype (S12) with the patients' isolates. Among 37 adults, reactive arthritis (ReA) was found in 8 (22%) and three adults had probable ReA. Six (67%) out of nine human leucocyte antigen (HLA) typed patients with ReA were HLA-B27 positive. Erythema nodosum was found in 42% of the 12 children, whereas none of them had definite ReA. CONCLUSIONS In this outbreak, Y pseudotuberculosis was for the first time detected in both patient and food samples. ReA was more common than earlier reported in the outbreaks associated with this pathogen; the reason may be that the previous outbreaks have occurred among children. HLA-B27 frequency was higher than usually reported in single-source outbreaks of ReA.
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Affiliation(s)
- M Vasala
- Department of Medicine, Kainuu Central Hospital, Kajaani, Finland
| | - S Hallanvuo
- Finnish Food Safety Authority Evira, Helsinki, Finland
| | - P Ruuska
- Northern Finland Laboratory Centre (NordLab), Kainuu Central Hospital, Kajaani, Finland
| | - R Suokas
- Department of Pediatrics, Kainuu Central Hospital, Kajaani, Finland
| | - A Siitonen
- Bacteriology Unit, National Institute for Health and Welfare (THL), Helsinki, Finland
| | - M Hakala
- Department of Musculoskeletal Medicine and Rehabilitation, Medical School, University of Tampere, Tampere, Finland Division of Rheumatology, Department of Medicine and Rehabilitation Center, Päijät-Häme Central Hospital, Lahti, Finland
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12
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Tuompo R, Hannu T, Siitonen A, Leirisalo-Repo M. THU0440 Yersinia Enterocolitica Biotype 1A Infection can Trigger Reactive Arthritis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.968] [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: 11/03/2022]
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13
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Tuompo R, Hannu T, Mattila L, Siitonen A, Leirisalo-Repo M. Reactive arthritis followingSalmonellainfection: a population-based study. Scand J Rheumatol 2013; 42:196-202. [DOI: 10.3109/03009742.2012.739201] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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14
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Bonkoungou IJO, Lienemann T, Martikainen O, Dembelé R, Sanou I, Traoré AS, Siitonen A, Barro N, Haukka K. Diarrhoeagenic Escherichia coli detected by 16-plex PCR in children with and without diarrhoea in Burkina Faso. Clin Microbiol Infect 2011; 18:901-6. [PMID: 21985619 DOI: 10.1111/j.1469-0691.2011.03675.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The importance of diarrhoeagenic Escherichia coli (DEC) in Africa is poorly understood, and is unknown in Burkina Faso. This study investigated the occurrence of five major DEC pathogroups in primary cultures of stool samples from 658 Burkinabe children under 5 years old using 16-plex PCR for virulence-associated genes. At least one DEC pathogroup was detected in 45% of 471 children with diarrhoea and in 29% of 187 children without diarrhoea (p <0.001). More than one DEC pathogroup was detected in 11% of children with and 1% of children without diarrhoea (p <0.001). Enteroaggregative E. coli was the most common pathogroup in both children with diarrhoea (26%) and children without diarrhoea (21%). Enteropathogenic E. coli and enterotoxigenic E. coli were detected significantly more often in children with diarrhoea (16% and 13%) than in children without diarrhoea (5% and 4%; p <0.001 for both pathogroups). Shiga toxin-producing E. coli and enteroinvasive E. coli were detected only in children with diarrhoea (2% and 1%, respectively). Diarrhoeagenic E. coli, especially enteropathogenic and enterotoxigenic, may be important, unrecognized causes of childhood diarrhoea in Burkina Faso.
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Affiliation(s)
- I J O Bonkoungou
- Bacteriology Unit, National Institute for Health and Welfare, THL, Helsinki, Finland.
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15
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Rimhanen-Finne R, Niskanen T, Lienemann T, Johansson T, Sjöman M, Korhonen T, Guedes S, Kuronen H, Virtanen MJ, Mäkinen J, Jokinen J, Siitonen A, Kuusi M. A Nationwide Outbreak of Salmonella Bovismorbificans Associated with Sprouted Alfalfa Seeds in Finland, 2009. Zoonoses Public Health 2011; 58:589-96. [DOI: 10.1111/j.1863-2378.2011.01408.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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16
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Viiri J, Hyttinen JMT, Ryhänen T, Rilla K, Paimela T, Kuusisto E, Siitonen A, Urtti A, Salminen A, Kaarniranta K. p62/sequestosome 1 as a regulator of proteasome inhibitor-induced autophagy in human retinal pigment epithelial cells. Mol Vis 2010; 16:1399-414. [PMID: 20680098 PMCID: PMC2913138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2010] [Accepted: 07/22/2010] [Indexed: 11/25/2022] Open
Abstract
PURPOSE The pathogenesis of age-related macular degeneration involves impaired protein degradation in retinal pigment epithelial (RPE) cells. The ubiquitin-proteasome pathway and the lysosomal pathway including autophagy are the major proteolytic systems in eukaryotic cells. Prior to proteolysis, heat shock proteins (HSPs) attempt to refold stress-induced misfolded proteins and thus prevent the accumulation of cytoplasmic protein aggregates. Recently, p62/sequestosome 1 (p62) has been shown to be a key player linking the proteasomal and lysosomal clearance systems. In the present study, the functional roles of p62 and HSP70 were evaluated in conjunction with proteasome inhibitor-induced autophagy in human RPE cells (ARPE-19). METHODS The p62, HSP70, and ubiquitin protein levels and localization were analyzed by western blotting and immunofluorescense. Confocal and transmission electron microscopy were used to detect cellular organelles and to evaluate the morphological changes. The p62 and HSP70 levels were modulated using RNA interference and overexpression techniques. Cell viability was measured by colorimetric assay. RESULTS Proteasome inhibition evoked the accumulation of perinuclear aggregates that strongly colocalized with p62 and HSP70. The p62 perinuclear accumulation was time- and concentration-dependent after MG-132 proteasome inhibitor loading. The silencing of p62, rather than Hsp70, evoked suppression of autophagy, when related to decreased LC3-II levels after bafilomycin treatment. In addition, the p62 silencing decreased the ubiquitination level of the perinuclear aggregates. Recently, we showed that hsp70 mRNA depletion increased cell death in ARPE-19 cells. Here, we demonstrate that p62 mRNA silencing has similar effects on cellular viability. CONCLUSIONS Our findings open new avenues for understanding the mechanisms of proteolytic processes in retinal cells, and could be useful in the development of novel therapies targeting p62 and HSP70.
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Affiliation(s)
- Johanna Viiri
- Department of Ophthalmology, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland
| | - Juha M. T. Hyttinen
- Department of Ophthalmology, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland
| | - Tuomas Ryhänen
- Department of Ophthalmology, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland
| | - Kirsi Rilla
- Department of Anatomy, Institute of Biomedicine, University of Eastern Finland, Kuopio, Finland
| | - Tuomas Paimela
- Department of Ophthalmology, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland
| | - Erkki Kuusisto
- Department of Neurology, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland
| | - Ari Siitonen
- Department of Neurology, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland
| | - Arto Urtti
- Centre for Drug Research, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland
| | - Antero Salminen
- Department of Neurology, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland
| | - Kai Kaarniranta
- Department of Ophthalmology, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland,Department of Ophthalmology, Kuopio University Hospital, Kuopio, Finland
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17
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Rimhanen-Finne R, Lukinmaa S, Martelius T, Rossow H, Karpíšková R, Dedicova D, Galajeva J, Bormane A, Siitonen A, Kuusi M. Cases of Salmonella Urbana in Finland, the Czech Republic and Latvia, January-February 2010. Euro Surveill 2010. [DOI: 10.2807/ese.15.11.19511-en] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A cluster of 14 cases of Salmonella Urbana cases in Finland, the Czech Republic and Latvia were identified in January-February, 2010. The majority of cases (11) were male and children under 16 years of age. The investigation is currently ongoing and comparison of pulsed-field gel electrophoresis (PFGE) profiles of the isolates suggests that the cases may have a common source of infection.
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Affiliation(s)
- R Rimhanen-Finne
- National Institute for Health and Welfare, Epidemiologic Surveillance and Response Unit, Helsinki, Finland
| | - S Lukinmaa
- National Institute for Health and Welfare, Bacteriology Unit, Helsinki, Finland
| | - T Martelius
- National Institute for Health and Welfare, Epidemiologic Surveillance and Response Unit, Helsinki, Finland
| | - H Rossow
- National Institute for Health and Welfare, Epidemiologic Surveillance and Response Unit, Helsinki, Finland
| | - R Karpíšková
- National Institute of Public Health, Prague, Czech Republic
| | - D Dedicova
- National Institute of Public Health, Prague, Czech Republic
| | - J Galajeva
- State Agency “Infectology Center of Latvia”, Riga, Latvia
| | - A Bormane
- State Agency “Infectology Center of Latvia”, Riga, Latvia
| | - A Siitonen
- National Institute for Health and Welfare, Bacteriology Unit, Helsinki, Finland
| | - M Kuusi
- National Institute for Health and Welfare, Epidemiologic Surveillance and Response Unit, Helsinki, Finland
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18
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Rimhanen-Finne R, Lukinmaa S, Martelius T, Rossow H, Karpiskova R, Dedicova D, Galajeva J, Bormane A, Siitonen A, Kuusi M. Cases of Salmonella Urbana in Finland, the Czech Republic and Latvia, January-February 2010. Euro Surveill 2010; 15:19511. [PMID: 20338145] [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: 05/29/2023] Open
Abstract
A cluster of 14 cases of Salmonella Urbana cases in Finland, the Czech Republic and Latvia were identified in January-February, 2010. The majority of cases (11) were male and children under 16 years of age. The investigation is currently ongoing and comparison of pulsed-field gel electrophoresis (PFGE) profiles of the isolates suggests that the cases may have a common source of infection.
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Affiliation(s)
- R Rimhanen-Finne
- National Institute for Health and Welfare, Epidemiologic Surveillance and Response Unit, Helsinki, Finland.
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19
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Kauko T, Haukka K, Abuoun M, Anjum MF, Woodward MJ, Siitonen A. Phenotype MicroArray in the metabolic characterisation of Salmonella serotypes Agona, Enteritidis, Give, Hvittingfoss, Infantis, Newport and Typhimurium. Eur J Clin Microbiol Infect Dis 2010; 29:311-7. [PMID: 20094898 DOI: 10.1007/s10096-009-0859-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2009] [Accepted: 12/11/2009] [Indexed: 11/24/2022]
Abstract
The Phenotype MicroArray (PM) technology was used to study the metabolic characteristics of 29 Salmonella strains belonging to seven serotypes of S. enterica spp. enterica. Strains of serotypes Typhimurium (six strains among definite phage types DTs 1, 40 and 104) and Agona (two strains) were tested for 949 substrates, Enteritidis (six strains of phage type PT1), Give, Hvittingfoss, Infantis and Newport strains (two of each) were tested for 190 substrates and seven other Agona strains for 95 substrates. The strains represented 18 genotypes in pulsed-field gel electrophoresis (PFGE). Among 949 substrates, 18 were identified that could be used to differentiate between the strains of those seven serotypes or within a single serotype. Unique metabolic differences between the Finnish endemic Typhimurium DT1 and Agona strains were detected, for example, in the metabolism of D-tagatose, D-galactonic acid gamma-lactone and L-proline as a carbon source. Thus, the PM technique is a useful tool for identifying potential differential markers on a metabolic basis that could be used for epidemiological surveillance.
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Affiliation(s)
- T Kauko
- Bacteriology Unit, Department of Infectious Diseases Surveillance and Control, National Institute for Health and Welfare (THL), P.O. Box 30, 00271 Helsinki, Finland
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20
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Petrov P, Parmakova K, Siitonen A, Asseva G, Kauko T, Kojouharova M, Kantardjiev T. Salmonellosis cases caused by a rare Salmonella Enteritidis PT6c associated with travel to Bulgaria, June-July 2008. Euro Surveill 2009. [DOI: 10.2807/ese.14.08.19130-en] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In June 2008 an outbreak of gastroenteritis was registered in Sunny Beach resort situated on the Black Sea coast in Bulgaria, affecting 14 employees of a hotel, five of whom tested positive for Salmonella Enteritidis. During June-July 2008 four sporadic S. Enteritidis cases were also reported and two of them were foreign tourists. In the same period S. Enteritidis cases connected with travel to Bulgaria were reported to the European Centre for Disease Prevention and Control (ECDC) from Finland, United Kingdom, Sweden, Germany and Norway. We describe a study performed to find out relatedness between Bulgarian and Finnish S. Enteritidis isolates using phage typing (PT) and pulse-field gel electrophoresis (PFGE). Fifteen S. Enteritidis isolates from Bulgaria and 195 from Finland (including 28 from travellers to Bulgaria) were phage typed. Within Bulgarian isolates four different PTs were found and PT6c with eight strains was predominant. Nineteen out of 28 strains isolated from the Finns visiting Bulgaria belonged also to PT6c. PFGE typing (with one enzyme) of all S. Enteritidis PT6c strains (8 Bulgarian and 19 Finnish isolates) showed indistinguishable PFGE profile. The typing results thus demonstrated a link between Bulgarian and Finnish S. Enteritidis isolates. We conclude that S. Enteritidis PT6c was the cause of a salmonellosis outbreak in Sunny Beach and was exported to Finland, and likely to the United Kingdom, Norway, Sweden and Germany.
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Affiliation(s)
- P Petrov
- National Reference Laboratory for Enteric Pathogens, National Center of Infectious and Parasitic Diseases (NCIPD), Sofia, Bulgaria
| | - K Parmakova
- Department Epidemiology and Communicable Diseases Surveillance, National Center of Infectious and Parasitic Diseases (NCIPD), Sofia, Bulgaria
| | - A Siitonen
- Gastrointestinal Infection Unit, National Institute for Health and Welfare (THL), Helsinki, Finland
| | - G Asseva
- National Reference Laboratory for Enteric Pathogens, National Center of Infectious and Parasitic Diseases (NCIPD), Sofia, Bulgaria
| | - T Kauko
- Gastrointestinal Infection Unit, National Institute for Health and Welfare (THL), Helsinki, Finland
| | - M Kojouharova
- Department Epidemiology and Communicable Diseases Surveillance, National Center of Infectious and Parasitic Diseases (NCIPD), Sofia, Bulgaria
| | - T Kantardjiev
- National Reference Laboratory for Enteric Pathogens, National Center of Infectious and Parasitic Diseases (NCIPD), Sofia, Bulgaria
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21
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Petrov P, Parmakova K, Siitonen A, Asseva G, Kauko T, Kojouharova M, Kantardjiev T. Salmonellosis cases caused by a rare Salmonella Enteritidis PT6c associated with travel to Bulgaria, June-July 2008. Euro Surveill 2009; 14:19130. [PMID: 19250623] [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: 05/27/2023] Open
Abstract
In June 2008 an outbreak of gastroenteritis was registered in Sunny Beach resort situated on the Black Sea coast in Bulgaria, affecting 14 employees of a hotel, five of whom tested positive for Salmonella Enteritidis. During June-July 2008 four sporadic S. Enteritidis cases were also reported and two of them were foreign tourists. In the same period S. Enteritidis cases connected with travel to Bulgaria were reported to the European Centre for Disease Prevention and Control (ECDC) from Finland, United Kingdom, Sweden, Germany and Norway. We describe a study performed to find out relatedness between Bulgarian and Finnish S. Enteritidis isolates using phage typing (PT) and pulse-field gel electrophoresis (PFGE). Fifteen S. Enteritidis isolates from Bulgaria and 195 from Finland (including 28 from travellers to Bulgaria) were phage typed. Within Bulgarian isolates four different PTs were found and PT6c with eight strains was predominant. Nineteen out of 28 strains isolated from the Finns visiting Bulgaria belonged also to PT6c. PFGE typing (with one enzyme) of all S. Enteritidis PT6c strains (8 Bulgarian and 19 Finnish isolates) showed indistinguishable PFGE profile. The typing results thus demonstrated a link between Bulgarian and Finnish S. Enteritidis isolates. We conclude that S. Enteritidis PT6c was the cause of salmonella outbreak in Sunny Beach and was exported to Finland, and likely to the United Kingdom, Norway, Sweden and Germany.
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Affiliation(s)
- P Petrov
- National Reference Laboratory for Enteric Pathogens, National Center of Infectious and Parasitic Diseases (NCIPD), Sofia, Bulgaria
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22
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Antikainen J, Tarkka E, Haukka K, Siitonen A, Vaara M, Kirveskari J. New 16-plex PCR method for rapid detection of diarrheagenic Escherichia coli directly from stool samples. Eur J Clin Microbiol Infect Dis 2009; 28:899-908. [DOI: 10.1007/s10096-009-0720-x] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2008] [Accepted: 02/05/2009] [Indexed: 10/21/2022]
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23
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Nissinen A, Strandén P, Myllys R, Takkinen J, Björkman Y, Leinikki P, Siitonen A. Point-of-care testing of group A streptococcal antigen: performance evaluated by external quality assessment. Eur J Clin Microbiol Infect Dis 2008; 28:17-20. [DOI: 10.1007/s10096-008-0580-9] [Citation(s) in RCA: 12] [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] [Received: 12/01/2007] [Accepted: 06/06/2008] [Indexed: 11/27/2022]
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24
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Nakari UM, Puhakka A, Siitonen A. Correct identification and discrimination between Campylobacter jejuni and C. coli by a standardized hippurate test and species-specific polymerase chain reaction. Eur J Clin Microbiol Infect Dis 2008; 27:513-8. [PMID: 18317822 DOI: 10.1007/s10096-008-0467-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2007] [Accepted: 01/16/2008] [Indexed: 11/26/2022]
Affiliation(s)
- U-M Nakari
- National Public Health Institute, Mannerheimintie 166, 00300, Helsinki, Finland
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Sihvonen L, Kuusi M, Hallanvuo S, Huovinen E, Haukka K, Siitonen A. O252 Majority of the clinical Yersinia enterocolitica isolates in Finland belong to biotype 1A. Int J Antimicrob Agents 2007. [DOI: 10.1016/s0924-8579(07)70160-7] [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: 10/23/2022]
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26
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Peters TM, Berghold C, Brown D, Coia J, Dionisi AM, Echeita A, Fisher IST, Gatto AJ, Gill N, Green J, Gerner-Smidt P, Heck M, Lederer I, Lukinmaa S, Luzzi I, Maguire C, Prager R, Usera M, Siitonen A, Threlfall EJ, Torpdahl M, Tschäpe H, Wannet W, Zwaluw WKVD. Relationship of pulsed-field profiles with key phage types of Salmonella enterica serotype Enteritidis in Europe: results of an international multi-centre study. Epidemiol Infect 2007; 135:1274-81. [PMID: 17306053 PMCID: PMC2870705 DOI: 10.1017/s0950268807008102] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Salmonella is one of the most common causes of foodborne infection in Europe with Salmonella enterica serovar Enteritidis (S. Enteritidis) being the most commonly identified serovar. The predominant phage type for S. Enteritidis is phage type (PT) 4, although PT 8 has increased in incidence. Within these phage types, pulsed-field gel electrophoresis (PFGE) provides a method of further subdivision. The international project, Salm-gene, was established in 2001 to develop a database of PFGE profiles within nine European countries and to establish criteria for real-time pattern recognition. It uses DNA fingerprints of salmonellas to investigate outbreaks and to evaluate trends and emerging issues of foodborne infection within Europe. The Salm-gene database contains details of about 11 700 S. Enteritidis isolates, demonstrating more than 65 unique PFGE profiles. The clonal nature of S. Enteritidis is evidenced by the high similarity and distribution of PFGE profiles. Over 56% (6603/11 716) of the submitted isolates of several different phage types were profile SENTXB.0001, although this profile is most closely associated with PT 4. The next most common profiles, SENTXB.0002 and SENTXB.0005, were closely associated with PT 8 and PT 21 respectively. Studies to investigate the relationship of profile types with outbreaks and possible vehicles of infection suggest that the incidence of PFGE profile SENTXB.0002, and thus PT 8, in some countries may be due to importation of foods or food production animals from Eastern Europe, where PT 8 is amongst the most frequently identified phage types. Collation of subtyping data, especially in the commonly recognized phage types, is necessary in order to evaluate trends and emerging issues in salmonella infection.
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Affiliation(s)
- T M Peters
- Health Protection Agency, Centre for Infections, London, UK.
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27
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Eklund M, Bielaszewska M, Nakari UM, Karch H, Siitonen A. Molecular and phenotypic profiling of sorbitol-fermenting Escherichia coli O157:H- human isolates from Finland. Clin Microbiol Infect 2006; 12:634-41. [PMID: 16774559 DOI: 10.1111/j.1469-0691.2006.01478.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
This study investigated the occurrence of virulence-associated genes, including stx1, stx2, stx2c, stx2d, stx2e, eae and its subtypes (alpha, beta, gamma, epsilon), efa1, cdt-V cluster, enterohaemorrhagic Escherichia coli (EHEC)-hlyA, katP, espP, etpD, sfpA and the flagellar fliC gene, in nine sorbitol-fermenting (SF), beta-glucuronidase-positive E. coli O157:H- (non-motile) isolates obtained from humans in Finland between 1997 and 2001. In addition, the production of Shiga toxin (Stx), cytolethal distending toxin (CDT)-V and EHEC haemolysin (EHEC-Hly) was studied, and the phage type (PT) and pulsed-field gel electrophoresis (PFGE) types were determined. All nine isolates carried eae-gamma, efa1, EHEC-hlyA, etpD, sfpA and fliC; eight also harboured the cdt-V gene cluster and five were positive for stx2. None of the isolates harboured stx1, stx2c, stx2d, stx2e, katP or espP. All isolates harbouring the corresponding genes also produced Stx2 and CDT-V in titres ranging from 1:32 to 1:128 and from 1:2 to 1:4, respectively. None of the isolates expressed EHEC-Hly on enterohaemolysin agar. Seven isolates belonged to PT88 and two had a PT88 variant pattern. Seven isolates showed a close genetic relationship, with a PFGE similarity index (SI) of 92-98%. Two isolates, temporally the first and last, obtained 5 years apart, were the most divergent (SI of 71% and 85%, respectively). The study demonstrated that SF E. coli O157:H- isolates from Finland are closely related and show a close relationship with SF E. coli O157 strains isolated in Germany. This finding suggests a clonality of SF E. coli O157:H- isolates from different geographical regions.
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Affiliation(s)
- M Eklund
- Enteric Bacteria Laboratory, Department of Bacterial and Inflammatory Diseases, National Public Health Institute (KTL), Helsinki, Finland
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28
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Abstract
We analysed the surveillance data from listeriosis cases notified to the Finnish National Infectious Diseases Register between 1995 and 2004 and describe our recent experience in investigating clusters of listeriosis cases. The number of annual cases varied between 18 and 53 but no trends in incidence were identified (average annual incidence was 7 cases per million inhabitants).
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Affiliation(s)
- O Lyytikäinen
- Department of Infectious Disease Epidemiology, National Public Health Institute (KTL), Helsinki, Finland
| | - U M Nakari
- Department of Bacterial and Inflammatory Diseases, Enteric Bacteria Laboratory, National Public Health Institute (KTL), Helsinki, Finland
| | - S Lukinmaa
- Department of Bacterial and Inflammatory Diseases, Enteric Bacteria Laboratory, National Public Health Institute (KTL), Helsinki, Finland
| | - E Kela
- Department of Infectious Disease Epidemiology, National Public Health Institute (KTL), Helsinki, Finland
| | - N Nguyen Tran Minh
- Department of Infectious Disease Epidemiology, National Public Health Institute (KTL), Helsinki, Finland
| | - A Siitonen
- Department of Bacterial and Inflammatory Diseases, Enteric Bacteria Laboratory, National Public Health Institute (KTL), Helsinki, Finland
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29
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Guérin PJ, Nygård K, Siitonen A, Vold L, Kuusi M, de Jong B, Rottingen JA, Alvseike O, Olsson A, Lassen J, Andersson Y, Aavitsland P. Emerging Salmonella Enteritidis anaerogenic phage type 14b: Outbreak in Norwegian, Swedish and Finnish travellers returning from Greece. Euro Surveill 2006; 11:5-6. [DOI: 10.2807/esm.11.02.00599-en] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In July 2001, the Norwegian Institute of Public Health (Folkehelseinstituttet, FHI) reported a cluster of Salmonella Enteritidis of phage type 14b infections in Norwegian travellers returning from Greece. An increase in the same uncommon phage type was also registered in Sweden and Finland at the same time. Cases of S. Enteritidis PT 14b in patients returning from Greece were reported in these three Nordic countries in 2001 (303 cases), 2002 (164 cases) and 2003 (199 cases). Case-control studies performed in 2001 in Norway and Sweden indicated that consumption of chicken was associated with illness. In 2002 and 2003, continuing case reports indicated that this uncommon phage type had probably become established in the Greek food chain. Tour operators were informed and contacts were made with Greek public health authorities. Because place of infection is not systematically included in most Salmonella notification systems, the S. Enteritidis phage type 14b outbreak reported here may represent only part of a larger outbreak among travellers visiting Greece. Infections are often reported only in the tourists’ home countries and public health authorities in the tourist destinations may not be aware of the problem. Further collaboration between national institutes of public health in Europe is needed to detect outbreaks occurring among tourists.
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Affiliation(s)
- P J Guérin
- EPIET fellow (European Programme for Intervention Epidemiology Training)
- Division of Infectious Disease Control, Norwegian Institute of Public Health (FHI), Oslo, Norway
| | - K Nygård
- Department of Epidemiology, Swedish Institute for Infectious Disease Control (SMI), Solna, Sweden
- EPIET fellow (European Programme for Intervention Epidemiology Training)
| | - A Siitonen
- Enteric Bacteria Laboratory, Department of Bacterial and Inflammatory Diseases, National Public Health Institute (KTL), Helsinki, Finland
| | - L Vold
- EPIET fellow (European Programme for Intervention Epidemiology Training)
- Division of Infectious Disease Control, Norwegian Institute of Public Health (FHI), Oslo, Norway
| | - M Kuusi
- Department of Infectious Disease Epidemiology, National Public Health Institute (KTL), Helsinki, Finland
| | - B de Jong
- Department of Epidemiology, Swedish Institute for Infectious Disease Control (SMI), Solna, Sweden
| | - J A Rottingen
- Institute for Nutrition Research, University of Oslo, Norway
- Division of Infectious Disease Control, Norwegian Institute of Public Health (FHI), Oslo, Norway
| | - O Alvseike
- Division of Infectious Disease Control, Norwegian Institute of Public Health (FHI), Oslo, Norway
| | - A Olsson
- Department of Epidemiology, Swedish Institute for Infectious Disease Control (SMI), Solna, Sweden
| | - J Lassen
- Department of Epidemiology, Swedish Institute for Infectious Disease Control (SMI), Solna, Sweden
| | - Y Andersson
- Department of Epidemiology, Swedish Institute for Infectious Disease Control (SMI), Solna, Sweden
| | - P Aavitsland
- Division of Infectious Disease Control, Norwegian Institute of Public Health (FHI), Oslo, Norway
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30
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Gatto AJ, Peters TM, Green J, Fisher IST, Gill ON, O'brien SJ, Maguire C, Berghold C, Lederer I, Gerner-Smidt P, Torpdahl M, Siitonen A, Lukinmaa S, Tschäpe H, Prager R, Luzzi I, Dionisi AM, VAN DER Zwaluw WK, Heck M, Coia J, Brown D, Usera M, Echeita A, Threlfall EJ. Distribution of molecular subtypes within Salmonella enterica serotype Enteritidis phage type 4 and S. Typhimurium definitive phage type 104 in nine European countries, 2000-2004: results of an international multi-centre study. Epidemiol Infect 2006; 134:729-36. [PMID: 16436221 PMCID: PMC2870468 DOI: 10.1017/s0950268805005820] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/15/2005] [Indexed: 11/07/2022] Open
Abstract
This study investigates the distribution of pulsed-field gel electrophoresis (PFGE) profiles within Salmonella enterica serotype Enteritidis phage type (PT) 4 and S. Typhimurium definitive phage type (DT) 104, from cases of human infection in nine European countries from 2000 to 2004. Isolates were subtyped using standardized methods and gel images submitted by each participating country to the coordinating centre (Health Protection Agency Centre for Infections, London, UK), where they were entered into a central database, developed within BioNumerics software, and designated using an agreed nomenclature. S. Enteritidis PT4 (n=3637) was differentiated into 38 different profiles. Simpson's index of diversity (D) of profiles ranged from 0.2 to 0.4. Profile SENTXB.0001 represented at least 80% of all profiles in each country. S. Typhimurium DT104 (n=1202) was differentiated into 28 different profile types. Simpson's D was at least 0.6 in all countries except in Austria and Italy. In both these countries over 74% of S. Typhimurium DT104 profiles were STYMXB.0013. Profile STYMXB.0061, was predominant in Denmark, Spain, Finland and England and Wales where it represented between 36% and 45% of profiles. Profile STYMXB.0001 represented nearly half of all profiles in Scotland and 23% in England and Wales. PFGE is proving useful for further discrimination within S. Enteritidis PT4 and S. Typhimurium DT104. Ascertainment of international outbreaks involving common serotypes and phage types may be increased by the timely pooling of PFGE profiles within a central database readily accessible to all participating countries.
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Affiliation(s)
- A J Gatto
- Health Protection Agency Centre for Infections, London, UK.
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31
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Lyytikäinen O, Nakari UM, Lukinmaa S, Kela E, Nguyen Tran Minh N, Siitonen A. Surveillance of listeriosis in Finland during 1995-2004. Euro Surveill 2006; 11:82-5. [PMID: 16801696] [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: 05/10/2023] Open
Abstract
We analysed the surveillance data from listeriosis cases notified to the Finnish National Infectious Diseases Register between 1995 and 2004 and describe our recent experience in investigating clusters of listeriosis cases. The number of annual cases varied between 18 and 53 but no trends in incidence were identified (average annual incidence was 7 cases per million inhabitants). Only a few cases affected pregnant women or newborns. Most of the patients were elderly people with non-malignant underlying illnesses; 25% of them died from their infections. By routine sero- and genotyping of the listeria isolates, we detected several clusters; the vehicle for infection was only identified for two outbreaks. At least one quarter of listeriosis cases (78/315) was caused by a certain sero-genotype or closely related genotypes, which have also been found from vacuum-packed cold-smoked or cold-salted fish products. During 2000-2003, Finnish consumers were repeatedly informed about food precautions for risk groups. The information was also given to attending physicians and prenatal clinics.
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Affiliation(s)
- O Lyytikäinen
- Department of Infectious Disease Epidemiology, National Public Health Institute (KTL), Helsinki, Finland
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32
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Guerin PJ, Nygard K, Siitonen A, Vold L, Kuusi M, de Jong B, Rottingen JA, Alvseike O, Olsson A, Lassen J, Andersson Y, Aavitsland P. Emerging Salmonella Enteritidis anaerogenic phage type 14b: outbreak in Norwegian, Swedish and Finnish travellers returning from Greece. Euro Surveill 2006; 11:61-6. [PMID: 16525196] [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: 05/07/2023] Open
Abstract
In July 2001, the Norwegian Institute of Public Health (Folkehelseinstituttet, FHI) reported a cluster of Salmonella Enteritidis of phage type 14b infections in Norwegian travellers returning from Greece. An increase in the same uncommon phage type was also registered in Sweden and Finland at the same time. Cases of S. Enteritidis PT 14b in patients returning from Greece were reported in these three Nordic countries in 2001 (303 cases), 2002 (164 cases) and 2003 (199 cases). Case-control studies performed in 2001 in Norway and Sweden indicated that consumption of chicken was associated with illness. In 2002 and 2003, continuing case reports indicated that this uncommon phage type had probably become established in the Greek food chain. Tour operators were informed and contacts were made with Greek public health authorities. Because place of infection is not systematically included in most Salmonella notification systems, the S. Enteritidis phage type 14b outbreak reported here may represent only part of a larger outbreak among travellers visiting Greece. Infections are often reported only in the tourists' home countries and public health authorities in the tourist destinations may not be aware of the problem. Further collaboration between national institutes of public health in Europe is needed to detect outbreaks occurring among tourists.
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Affiliation(s)
- P J Guerin
- Division of Infectious Disease Control, Norwegian Institute of Public Health FHI, Oslo, Norway
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33
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Hannu T, Mattila L, Rautelin H, Siitonen A, Leirisalo-Repo M. Three cases of cardiac complications associated with Campylobacter jejuni infection and review of the literature. Eur J Clin Microbiol Infect Dis 2005; 24:619-22. [PMID: 16167138 DOI: 10.1007/s10096-005-0001-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Presented here are three cases of acute cardiac disease (myocarditis, myopericarditis, and acute atrial fibrillation) associated with Campylobacter jejuni infection, followed by a review of the corresponding literature. Since Campylobacter jejuni is the most common cause of human bacterial enteritis in developed countries, these cases emphasize the importance of keeping cardiac complications in mind when treating patients with acute gastroenteritis due to this pathogen.
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Affiliation(s)
- T Hannu
- Department of Medicine, Division of Rheumatology, Helsinki University Central Hospital (HUCH), PO Box 263, 00029, Helsinki, Finland.
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34
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Eklund M, Nuorti JP, Ruutu P, Siitonen A. Shigatoxigenic Escherichia coli (STEC) infections in Finland during 1998-2002: a population-based surveillance study. Epidemiol Infect 2005; 133:845-52. [PMID: 16181504 PMCID: PMC2870315 DOI: 10.1017/s0950268805004450] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/11/2005] [Indexed: 11/06/2022] Open
Abstract
During 1998-2002, 124 microbiologically confirmed infections caused by shigatoxigenic Escherichia coli (STEC) were reported in Finland. Of these, 25 (20%) were associated with recent foreign travel. Temporal, geographical and type distribution of the domestically acquired infections (n=99) caused by strains of serogroup O157 (n=52) and non-O157 (n=47) were analysed further. The median age of the patients was 6.8 years (range 0.2-73.1 years). Of the index cases within 26 families, 71% were <5 years old. Family-related infections accounted for 49%, sporadic infections 39%, and 11% were associated with three clusters. Only strains of serogroup O157 carrying eae and stx 2 or its variants caused separate clusters. The incidence of STEC infections was at its highest (0.64/100000) in 1998. Since 1999 it has declined considerably (0.17/100000 in 2002). STEC infections occurred in 14 hospital districts, mostly (28%) in the Helsinki region. However, the incidence was highest (10.3) in northwest Finland.
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Affiliation(s)
- M Eklund
- Enteric Bacteria Laboratory, Department of Bacterial and Inflammatory Diseases, National Public Health Institute (KTL), FIN-00300 Helsinki, Finland
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35
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Hannu T, Mattila L, Siitonen A, Leirisalo-Repo M. Reactive arthritis attributable to Shigella infection: a clinical and epidemiological nationwide study. Ann Rheum Dis 2004; 64:594-8. [PMID: 15550534 PMCID: PMC1755450 DOI: 10.1136/ard.2004.027524] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVES To study the incidence and clinical picture of Shigella associated reactive arthritis (ReA) and the arthritogenicity of various Shigella species in the population. METHODS A questionnaire on enteric and extraintestinal, especially musculoskeletal, symptoms was sent to 278 consecutive patients with Shigella positive stool culture and to 597 controls. Analysis of self reported musculoskeletal symptoms was supplemented with clinical examination of those subjects with recent symptoms. RESULTS Of the patients, 14/211 (7%) had ReA, and a further 4/211 (2%) other reactive musculoskeletal symptoms (tendonitis, enthesopathy, or bursitis). Of the 14 patients with ReA, all adults, 10 had S sonnei, three S flexneri, and one S dysenteriae infection. HLA-B27 was positive in 36% of the patients with ReA. One control subject had ReA. In the patients with Shigella infection, the odds ratio for developing ReA was 16.2 (95% confidence interval 2.1 to 123.9), p = 0.001. CONCLUSIONS ReA occurred in 7% of patients after Shigella infection, with an annual incidence of 1.3/1 000 000 in Finland. Besides S flexneri, S sonnei and S dysenteriae can also trigger ReA.
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Affiliation(s)
- T Hannu
- Department of Medicine, Division of Rheumatology, Helsinki University Central Hospital, PO Box 263, FIN-00029 HUCH, Finland.
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36
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Jalava K, Hallanvuo S, Nakari UM, Ruutu P, Kela E, Heinäsmäki T, Siitonen A, Nuorti JP. Multiple outbreaks of Yersinia pseudotuberculosis infections in Finland. J Clin Microbiol 2004; 42:2789-91. [PMID: 15184472 PMCID: PMC427876 DOI: 10.1128/jcm.42.6.2789-2791.2004] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
During 2001, 89 culture-confirmed cases of Yersinia pseudotuberculosis were reported in Finland; 55 (62%) were serotype O:1, and 34 (38%) were serotype O:3. Four major pulsed-field gel electrophoresis profiles were identified. A case-control study of 25 case patients and 71 healthy controls identified eating outside the home as a risk factor for infection.
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Affiliation(s)
- Katri Jalava
- Communicable Disease Surveillance Centre, Health Protection Agency, 61 Colindale Ave., NW9 5EQ London, United Kingdom.
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37
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Lukinmaa S, Aarnisalo K, Suihko ML, Siitonen A. Diversity of Listeria monocytogenes isolates of human and food origin studied by serotyping, automated ribotyping and pulsed-field gel electrophoresis. Clin Microbiol Infect 2004; 10:562-8. [PMID: 15191386 DOI: 10.1111/j.1469-0691.2004.00876.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Automated ribotyping, pulsed-field gel electrophoresis (PFGE) and serotyping were evaluated for the epidemiological study of isolates of Listeria monocytogenes collected in Finland in 1997-1999 from human blood (n = 116) and the food industry (n = 72). The isolates divided into six serotypes, 23 EcoRI ribotypes, 54 AscI PFGE types, and 57 final subtypes if all results were combined. The discrimination index of ribotyping was lower (0.873) than that of PFGE (0.946). Two final subtypes dominated among human isolates, and identical subtypes were also found among food industry isolates. All PFGE types were serotype-specific, whereas two ribotypes included isolates of two serotypes. Isolates of serotype 3a, involved in an outbreak in Finland in 1999, matched one of these ribotypes, which also included some food industry isolates of serotype 1/2a. Ribotyping with EcoRI would not have been sufficient to define the outbreak in Finland caused by serotype 3a isolates. Although ribotyping is applicable as the first method in outbreak situations, human and food isolates with identical ribotypes should be investigated further by PFGE.
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Affiliation(s)
- S Lukinmaa
- Laboratory of Enteric Pathogens, National Public Health Institute, Helsinki, Finland
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38
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Lindqvist N, Heinikainen S, Siitonen A, Pelkonen S. Molecular characterization of Salmonella enterica subsp. enterica serovar Typhimurium DT1 isolates. Epidemiol Infect 2004; 132:263-72. [PMID: 15061501 PMCID: PMC2870102 DOI: 10.1017/s0950268803001614] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Salmonella Typhimurium DT1 is endemic to Finland and has caused human outbreaks since the 1960s. Domestic DT1 isolates (n=235) from 1972 to 1999 from human cases, animals and other sources, as well as foreign DT1 isolates from human cases (n=20) were analysed by molecular methods. Pulsed-field gel electrophoresis (PFGE) yielded 38 XbaI profiles. Of these, XbaI profile 10 was seen in 49% (125/255) of the isolates. Twelve IS200 profiles were obtained; the most common IS200 profile D was seen in 64% (33/52) of the isolates. Two clusters were formed by compilation of the XhaI-, BlnI- and SpeI-PFGE and IS200 profiles and possession of the serovar-specific virulence plasmid. The major cluster contained eight IS200 profiles, including IS200 profile D and XhaI profile 10, and had no virulence plasmid, and can be regarded as typical of the endemic Typhimurium DT1 infection.
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Affiliation(s)
- N Lindqvist
- National Veterinary and Food Research Institute, Kuopio Department, P.O. Box 92, FIN-70701 Kuopio, Finland
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39
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Niemi RM, Mentu J, Siitonen A, Niemelä SI. Confirmation of Escherichia coli and its distinction from Klebsiella species by gas and indole formation at 44 and 44.5 degrees C. J Appl Microbiol 2004; 95:1242-9. [PMID: 14632997 DOI: 10.1046/j.1365-2672.2003.02125.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
AIMS In the enumeration of coliform bacteria, confirmation of Escherichia coli has been based upon gas and indole production at the elevated incubation temperature. The test for gas production has recently been questioned. The aim of this study was to investigate the impact of gas production test on the reliability of confirmation of E. coli. METHODS AND RESULTS The impact of several media on growth, gas and/or indole formation was tested at 44 and 44.5 degrees C using 547 environmental isolates. These were mainly E. coli, Klebsiella pneumoniae, K. oxytoca and Enterobacter cloacae strains. Another set of 250 faecal and environmental klebsiellae were tested for their maximum temperature for growth (Tmax) and for gas formation. Escherichia coli and even K. pneumoniae grew well in all the media, but gas production was more dependent on the medium used. Growth of the mainly gas negative Ent. cloacae and K. oxytoca strains was still more sensitive to the medium and incubation conditions. Tryptophan salt broth was the most productive medium for the indole test, followed by lauryl tryptose mannitole and tryptone mannitol ricinoleate broth (TRM). Tmax of K. oxytoca was clearly lower than Tmax of K. pneumoniae but a rather high fraction of its isolates produced indole at 44.5 degrees C. CONCLUSIONS False-positive E. coli confirmation is possible if gas production is not tested for and the confirmation is based on indole test only. SIGNIFICANCE AND IMPACT OF THE STUDY Erroneous positive results on routine analysis for E. coli can occur.
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40
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Hannu T, Mattila L, Nuorti JP, Ruutu P, Mikkola J, Siitonen A, Leirisalo-Repo M. Reactive arthritis after an outbreak of Yersinia pseudotuberculosis serotype O:3 infection. Ann Rheum Dis 2003; 62:866-9. [PMID: 12922960 PMCID: PMC1754663 DOI: 10.1136/ard.62.9.866] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVE To determine the occurrence and clinical characteristics of reactive arthritis (ReA) after an outbreak of Yersinia pseudotuberculosis serotype O:3 infection. METHODS From 15 October to 6 November 1998, a widespread outbreak of Y pseudotuberculosis serotype O:3 occurred in Finland. A questionnaire on musculoskeletal symptoms was mailed to 38 patients with infection confirmed by culture. All patients who reported joint symptoms were interviewed by phone and their medical records of outpatient visits or hospital admission because of recent joint symptoms were reviewed. RESULTS Thirty three of 38 (87%) patients returned the questionnaire. Reactive musculoskeletal symptoms were reported by 5/33 (15%): four patients (12%) fulfilled the criteria for ReA and one additional patient had reactive enthesopathy. The patients with ReA were adults (age range 40-47 years), whereas the patient with reactive enthesopathy was a 14 year old boy. In all patients with ReA, the arthritis was polyarticular. In addition to peripheral arthritis, other musculoskeletal symptoms included sacroiliitis (one patient), pain in Achilles tendon (one patient), and heel pain (two patients). HLA-B27 was positive in all the three patients tested. In three of four patients with ReA, the duration of acute arthritis was over six months. CONCLUSION Y pseudotuberculosis serotype O:3 infection is frequently associated with ReA and the clinical picture is severe.
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Affiliation(s)
- T Hannu
- Department of Medicine, Division of Rheumatology, Helsinki University Central Hospital, Finland
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41
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Mattila L, Siitonen A, Peltola H. [Prevention and treatment of traveller's diarrhea]. Duodecim 2002; 117:1452-8; quiz 1459, 1471. [PMID: 12181955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
Affiliation(s)
- L Mattila
- HUS:n sisätautien toimiala, infektiosairauksien klinikka Meilahden sairaala PL 340, 00029 HUS.
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Siitonen A, Maijala R. [Microbiological dangers of food]. Duodecim 2002; 117:84-90. [PMID: 12092359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Affiliation(s)
- A Siitonen
- Kansanterveyslaitos, bakteriologian osasto Mannerheimintie 166, 00300 Helsinki.
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43
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Mäkynen H, Kahri J, Siitonen A, Sipilä I. [Progressing unconsciousness in a young male]. Duodecim 2002; 116:1841-4. [PMID: 12001638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Affiliation(s)
- H Mäkynen
- HUS:n kirurginen sairaala, anestesiaosasto PL 263, 00029 HUS.
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44
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Lyytikäinen O, Siitonen A, Johansson T, Lukinmaa S, Mikkola J, Ruutu P. [Listeriosis in Finland]. Duodecim 2002; 116:2111-8. [PMID: 12017732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Affiliation(s)
- O Lyytikäinen
- Kansanterveyslaitos, infektioepidemiologian osasto Mannerheimintie 166, 00300 Helsinki.
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45
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Liesegang A, Davos D, Balzer JC, Rabsch W, Prager R, Lightfoot D, Siitonen A, Claus H, Tschäpe H. Phage typing and PFGE pattern analysis as tools for epidemiological surveillance of Salmonella enterica serovar Bovismorbificans infections. Epidemiol Infect 2002; 128:119-30. [PMID: 12002528 PMCID: PMC2869803 DOI: 10.1017/s0950268801006719] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Some years ago, an increase in the number of sporadic cases and outbreaks of salmonellosis due to S. enterica serovar Bovismorbificans was observed in several European countries including Finland, Sweden, England/Wales, Austria, and Germany. In order to understand the recent spread of this serovar and to trace the route of infection back to its source, it was considered necessary to subtype S. Bovismorbificans isolates. Using phage typing (newly described here) and molecular fingerprinting (PFGE-pattern, plasmid profiles and ribotype) the isolates of European origin could be subtyped and compared to S. Bovismorbificans isolates that originated in overseas countries such as Australia, Thailand, India, etc. where this serovar was isolated more frequently. Significant clonal diversity was identified but some of the clonal types of S. Bovismorbificans dominated the epidemics and single cases in Europe as well as in overseas countries. The clonal identity among these isolates indicates an international distribution, new sources of infection, and highlights the urgent requirement for standardized laboratory based surveillance networks (e.g. Enter-Net). Moreover, it is suggested that strains of S. Bovismorbificans will continue to be of concern in public health and that phage typing together with PFGE typing can be applied as reliable and rapid tools for their future monitoring.
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Affiliation(s)
- A Liesegang
- National Reference Centre for Salmonellae and Other Enterics, Robert Koch Institute, Wernigerode, Germany
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46
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Lahti E, Eklund M, Ruutu P, Siitonen A, Rantala L, Nuorti P, Honkanen-Buzalski T. Use of phenotyping and genotyping to verify transmission of Escherichia coli O157:H7 from dairy farms. Eur J Clin Microbiol Infect Dis 2002; 21:189-95. [PMID: 11957020 DOI: 10.1007/s10096-001-0682-0] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
A total of 80 human infections by Escherichia coli O157:H7 were documented in Finland in 1997 and 1998. Most were sporadic and their sources undetermined. Five cases not associated with one another, one of which led to secondary transmission within a family, could be traced to five different dairy farms. These five case patients (age range 2-17 years, median age 3 years) were hospitalised with bloody diarrhoea; two of them developed haemolytic uraemic syndrome. All nine human isolates obtained were sorbitol negative, carried the verocytotoxin 2 and eae genes, and produced verocytotoxin and enterohaemolysin. The phage and pulsed-field gel electrophoresis types of the human and bovine isolates from the corresponding farms were indistinguishable. The cattle (20-70 animals per farm) were monitored for up to 2 years after the human cases. The proportion of cattle excreting the type that caused the human infections varied from 3.2 to 66.7% when sampled soon after the human cases, and from 0.0 to 5.3% about a year or so later. On most of the farms, the animals excreted the pathogen intermittently. On one farm, Escherichia coli O157 isolates with other characteristics were also occasionally isolated. Although the infections were traced back to the farms, it could not be established whether the source was unpasteurised milk or direct or indirect contact with cattle. The results of this study emphasise the need for special recommendations for children visiting or living on a farm to prevent these infections.
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Affiliation(s)
- E Lahti
- National Veterinary and Food Research Institute (EELA), Box 45 (Hämeentie 57), 00581 Helsinki, Finland.
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Hannu T, Mattila L, Rautelin H, Pelkonen P, Lahdenne P, Siitonen A, Leirisalo-Repo M. Campylobacter-triggered reactive arthritis: a population-based study. Rheumatology (Oxford) 2002; 41:312-8. [PMID: 11934969 DOI: 10.1093/rheumatology/41.3.312] [Citation(s) in RCA: 135] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVE To study the incidence and clinical picture of Campylobacter-associated reactive arthritis (ReA) and other reactive musculoskeletal symptoms in the population. METHODS A questionnaire on enteric and extraintestinal, including specifically musculoskeletal, symptoms was sent to 870 consecutive patients with Campylobacter-positive stool culture and 1440 matched controls. Analysis of self-reported musculoskeletal symptoms with clinical examination was performed. RESULTS Forty-five of the patients (7%) had ReA and eight (1%) had reactive tendinitis, enthesopathy or bursitis. No child had ReA. The arthritis was oligo- or polyarticular, and, in most cases, mild. HLA-B27 was positive in 14% of ReA patients. Of the 45 ReA patients, 37 had C. jejuni and 8 had C. coli infection. No controls had ReA. CONCLUSION ReA is common following Campylobacter infection, with an annual incidence of 4.3 per 100000. At the population level, acute ReA is mild, more frequent in adults, and not associated with HLA-B27. Besides C. jejuni, C. coli can trigger ReA.
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Affiliation(s)
- T Hannu
- Department of Medicine, Division of Rheumatology, Helsinki University Central Hospital, Finland
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Abstract
OBJECTIVES To determine the occurrence and the clinical picture of reactive arthritis (ReA) following an outbreak of Salmonella typhimurium. METHODS An outbreak of S typhimurium phage type DT 193 occurred in several municipalities in Finland in 1999. A questionnaire which had a specific emphasis on musculoskeletal symptoms was mailed to all 78 subjects with a positive stool culture. Based on the answers, all subjects with recent joint complaints were clinically examined or interviewed by telephone. RESULTS Sixty three of 78 subjects (81%) returned the questionnaire. Of these 63 subjects, five (8%) fulfilled the criteria for ReA. All the five subjects with ReA were adults with oligo- or polyarthritis. The antigen HLA-B27 was positive in two of the four subjects tested. In two of five subjects with ReA, the duration of acute arthritis was over six months. Subjects who had received antimicrobial drugs developed acute musculoskeletal symptoms significantly (p=0.013) less often than those without such treatment. None of the subjects with ReA had received antimicrobial drugs before the onset of joint symptoms. CONCLUSIONS The occurrence of ReA following an outbreak of S typhimurium was at the same level as in outbreaks due to other salmonella serotypes reported previously by us, indicating that the frequency of ReA after various outbreaks is approximately 10%. Early use of antimicrobial drugs may prevent the development of musculoskeletal symptoms.
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Affiliation(s)
- T Hannu
- Department of Medicine, Division of Rheumatology, Helsinki University Central Hospital, Finland.
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Jantunen ME, Saxén H, Salo E, Siitonen A. Recurrent urinary tract infections in infancy: relapses or reinfections? J Infect Dis 2002; 185:375-9. [PMID: 11807720 DOI: 10.1086/338771] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2001] [Revised: 09/30/2001] [Indexed: 11/03/2022] Open
Abstract
Seventeen infants with an index episode of pyelonephritis caused by Escherichia coli were monitored for 18 months for recurrent urinary tract infections (UTIs). All the infants had at least 1 recurrent UTI caused by the same pathogen. Twenty-six recurrent UTI episodes were recorded. The 40 E. coli strains available were analyzed by multiplex polymerase chain reaction for 3 alleles (classes I-III) of the papG gene and by pulsed-field gel electrophoresis (PFGE) after genomial digestion by XbaI. Of the 17 index strains, 12 (71%) carried the papG gene; 67% of these strains had class II alleles. In recurrent UTI isolates, the papG-positive E. coli appeared in 16 (70%) of 23 isolates. The proportion of all recurrent isolates available that represented a strain previously encountered (indistinguishable or highly similar in PFGE) in the same infant was 65%. Our results suggest that most recurrent UTIs in infants are endogenous relapses rather than reinfections caused by new organisms.
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Affiliation(s)
- M E Jantunen
- Hospital for Children and Adolescents, University of Helsinki, Finland.
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Cormio L, La Forgia P, La Forgia D, Siitonen A, Ruutu M. Bacterial adhesion to urethral catheters: role of coating materials and immersion in antibiotic solution. Eur Urol 2001; 40:354-8; discussion 359. [PMID: 11684855 DOI: 10.1159/000049799] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
OBJECTIVE To determine whether new coating materials (silver and hydrogel) or immersion in antibiotic solution may reduce or prevent bacterial adhesion to urethral catheters. METHODS Precut segment of Teflon-, silver- and hydrogel-coated urethral catheters were incubated with two uropathogenic bacterial strains with and without previous immersion in antibiotic solution. Tobramycin, ceftriaxone and ciprofloxacin solutions were used as these antibiotics are commonly administered for the prophylaxis and treatment of urinary tract infection (UTI), especially in hospitals. RESULTS Microbiological analysis showed that the new coating materials (silver and hydrogel) did not reduce bacterial adhesion to urethral catheters, whereas immersion in antibiotic solution yielded a statistically significant (p<0.05) reduction in bacterial adhesion to the test items. Among the antibiotic solutions tested, ciprofloxacin performed significantly better (p<0.005) than ceftriaxone and tobramycin. CONCLUSIONS Immersion in a suitable antibiotic solution may significantly reduce bacterial adhesion to urethral catheters and consequently reduce the risk of UTI in connection with these devices. Although experimental, these findings may be of clinical relevance and provide grounds for further studies in vivo.
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Affiliation(s)
- L Cormio
- Department of Urology, Helsinki University Central Hospital, Helsinki, Finland.
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