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Abdou M, Tercier-Waeber ML, Dutruch L, Bossy C, Pougnet F, Coynel A, Bakker E, Blanc G, Schäfer J. Estuarine dissolved speciation and partitioning of trace metals: a novel approach to study biogeochemical processes. Environ Res 2022; 208:112596. [PMID: 34968435 DOI: 10.1016/j.envres.2021.112596] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 12/03/2021] [Accepted: 12/16/2021] [Indexed: 06/14/2023]
Abstract
Estuaries are complex systems involving numerous biogeochemical gradients and processes that influence the behavior of trace metals. Lead (Pb), cadmium (Cd), and copper (Cu) speciation and partitioning were studied in the Gironde Estuary (SW France), using a multi-method approach in which data from innovative sensors and laboratory-based techniques were combined. For the first time in this system, the so-called dynamic fractions of the target metals (dissolved forms that are potentially bioavailable) were recorded on-board through voltammetry using unique antifouling gel-integrated microelectrode arrays (GIME) incorporated in a submersible sensing probe (TracMetal). Trace metals in the operationally defined dissolved <0.2 μm and <0.02 μm fractions, as well as complexed with suspended particles (collected after centrifugation) were quantified through sampling/laboratory-based techniques. High spatial resolution trace metal concentrations were monitored along the salinity gradient (S = 0.10 to S = 34.0) together with master bio-physicochemical parameters providing robust cruise-specific information on how well-known abiotic and biotic processes control the Gironde estuarine trace element partitioning, (i.e. conservative behavior, addition/removal). Combining conventional methods with GIME measurements showed: (i) the dominance of Cd dynamic species in the intra-estuarine total dissolved fraction (up to 90%), (ii) the importance of small colloids as trace metal carrier phases, desorbing and complexing dynamic fractions of Pb and Cu, and (iii) the potential influence of photo-redox processes remobilizing Pb under their dynamic forms (up to 80%). Data also suggest trace metal release/sorption by phytoplankton with an increase of dissolved Cu concentrations in the riverine branch, as well as Cu and Cd particulate concentrations showing higher levels towards productive coastal waters. This complete approach allowed to monitor key estuarine biogeochemical processes and highlighted the valuable use of the TracMetal to record subtle variations of potentially bioavailable dissolved metal fractions.
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Affiliation(s)
- M Abdou
- University of Geneva, Sciences II, 30 Quai E.-Ansermet, 1221, Geneva 4, Switzerland.
| | - M-L Tercier-Waeber
- University of Geneva, Sciences II, 30 Quai E.-Ansermet, 1221, Geneva 4, Switzerland.
| | - L Dutruch
- University of Bordeaux, Allée Geoffroy Saint-Hilaire, 33615, Pessac, France
| | - C Bossy
- University of Bordeaux, Allée Geoffroy Saint-Hilaire, 33615, Pessac, France
| | - F Pougnet
- University of Bordeaux, Allée Geoffroy Saint-Hilaire, 33615, Pessac, France
| | - A Coynel
- University of Bordeaux, Allée Geoffroy Saint-Hilaire, 33615, Pessac, France
| | - E Bakker
- University of Geneva, Sciences II, 30 Quai E.-Ansermet, 1221, Geneva 4, Switzerland
| | - G Blanc
- University of Bordeaux, Allée Geoffroy Saint-Hilaire, 33615, Pessac, France
| | - J Schäfer
- University of Bordeaux, Allée Geoffroy Saint-Hilaire, 33615, Pessac, France
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Van den Bosch L, Van der Schaaf A, Hoebers F, Van der Laan H, Schuit E, Bakker E, Wijers O, Van der Wel A, Steenbakkers R, Langendijk J. PV-0201 Development and validation of prediction models for salivary dysfunction in HN cancer patients. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)30621-8] [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: 10/26/2022]
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Billecocq S, Bo K, Dumoulin C, Aigon A, Amarenco G, Bakker E, Cornillet-Bernard M, Crétinon S, Deffieux X, Lartigues G, Loobuick M, Steenstrup B, de Tayrac R. [An International Urogynecological Association (IUGA)/International Continence Society (ICS) joint report on the terminology for the conservative and non-pharmacological management of female pelvic floor dysfunction]. Prog Urol 2019; 29:183-208. [PMID: 30803873 DOI: 10.1016/j.purol.2018.12.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 10/30/2018] [Accepted: 12/12/2018] [Indexed: 12/01/2022]
Abstract
INTRODUCTION There has been an increasing need for the terminology for the conservative management of female pelvic floor dysfunction to be collated in a clinically-based consensus report. METHODS This report combines the input of members and elected nominees of the Standardization and Terminology Committees of two International Organizations, the International Urogynecological Association (IUGA) and the International Continence Society (ICS), assisted at intervals by many external referees. An extensive process of nine rounds of internal and external review was developed to exhaustively examine each definition, with decision-making by collective opinion (consensus). Before opening up for comments on the webpages of ICS and IUGA, five experts from physiotherapy, neurology, urology, urogynecology and nursing were invited to comment on the paper. RESULTS A terminology report for the conservative management of female pelvic floor dysfunction, encompassing over 200 separate definitions, has been developed. It is clinically-based with the most common symptoms, signs, assessments, diagnoses and treatments defined. Clarity and user-friendliness have been key aims to make it interpretable by practitioners and trainees in all the different specialty groups involved in female pelvic floor dysfunction. Ongoing review is not only anticipated but will be required to keep the document updated and as widely acceptable as possible. CONCLUSION A consensus-based terminology report for the conservative management of female pelvic floor dysfunction has been produced aimed at being a significant aid to clinical practice and a stimulus for research.
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Affiliation(s)
- S Billecocq
- Maternité Notre-Dame-de-Bon-Secours, groupe hospitalier Paris-Saint-Joseph, 75014 Paris, France.
| | - K Bo
- Department of sports medecine, Norwegian school of sports sciences, PO Box Ulleval Stadion, 0806 Oslo, Norvège
| | - C Dumoulin
- Programme de physiothérapie, faculté de médecine, université de Montréal, Montréal, Canada
| | - A Aigon
- Cabinet kinésithérapie libéral, 44000 Nantes, France
| | - G Amarenco
- Service de neuro-urologie et exploration périnéale, hôpital Tenon, 75020 Paris, France
| | - E Bakker
- HEL de Vinci, Parnasse-ISEI, 1200 Bruxelles, Belgique
| | | | - S Crétinon
- Hôpital Foch, école de sages-femmes, 92150 Suresnes, France
| | - X Deffieux
- Service de gynécologie-obstétrique et médecine de la reproduction, hôpital Antoine-Béclère, 92140 Clamart, France
| | | | - M Loobuick
- Cabinet kinésithérapie libéral, 75017 Paris, France
| | - B Steenstrup
- Service d'urologie, CHU de Rouen Charles-Nicolle, 1, rue de Germont, 76031 Rouen cedex, France
| | - R de Tayrac
- Service de gynécologie-obstétrique, CHRU Caremeau, place du Pr-R.-Debré, 30029 Nîmes cedex 9, France
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Bröcker-Vriends AHJT, Briët E, Quadt R, Dreesen JCFM, Bakker E, Claassen-Tegelaar R, Kanhai HHH, van de Kamp JJP, Pearson PL. Genotype Assignment of Haemophilia A by Use of Intragenic and Extragenic Restriction Fragment Length Polymorphisms. Thromb Haemost 2018. [DOI: 10.1055/s-0038-1651080] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
SummaryWe performed DNA analysis in 20 families with haemophilia A in order to evaluate its usefulness for carrier detection and prenatal diagnosis.The polymorphic Bell site within intron 18 of the factor VIII gene and the extragenic TaqI and Bglll polymorphic sites which are detected by the random DNA probes designated St 14 and DX13, respectively, were investigated for.Two events of recombination were found between the St 14 and the haemophilia A locus in 51 informative meioses. In one of these recombinant meioses crossing over had also occurred between the DX13 and the haemophilia A locus. No further crossovers between the DX13 and the haemophilia A locus were found in 20 informative meioses.Segregation analysis of the polymorphic markers and the deleterious mutation within the families allowed a diagnosis at the gene level for 52 out of 57 potential carriers. The new method considerably decreased the uncertainty about carriership for seventeen of the nineteen women with a probability of carriership between 5% and 95% based on pedigree analysis and factor VIII assays.In seven cases chromosome and DNA analysis of a chorionic villus biopsy was carried out. Three of the fetuses were female, four were male. Three of the male fetuses had inherited the normal maternal X-chromosome and were, therefore, not affected. For another male fetus no diagnosis at the gene level was possible since the mother was homozygous for all the known restriction fragment length polymorphisms within or closely linked with the haemophilia A locus.
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Affiliation(s)
| | - E Briët
- The Department of Haematology, University Hospital, Leiden, The Netherlands
| | - R Quadt
- The Department of Haematology, University Hospital, Leiden, The Netherlands
| | - J C F M Dreesen
- The Department of Haematology, University Hospital, Leiden, The Netherlands
| | - E Bakker
- The Department of Human Genetics, University Hospital, Leiden, The Netherlands
| | | | - H H H Kanhai
- The Department of Obstetrics and Gynaecology, University Hospital, Leiden, The Netherlands
| | - J J P van de Kamp
- The Clinical Genetics Centre, University Hospital, Leiden, The Netherlands
| | - P L Pearson
- The Department of Human Genetics, University Hospital, Leiden, The Netherlands
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Abstract
SummaryA cDNA coding for the carboxy-terminal region of human protein S and containing a complete 3’-untranslated region, was isolated by a combination of antibody screening of a λgt11 human liver cDNA expression library and in situ hybridization of a pUC9 human liver cDNA library.Hybridization analysis of human total DNA with radiolabelled non-overlapping cDNA restriction fragments revealed the existence of two genes per haploid genome homologous with the protein S cDNA. Both genes were mapped to chromosome 3 using human-rodent cell hybrids. Neither of the genes showed polymorphism for sixteen different enzymes upon hybridization with the protein S cDNA.
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Affiliation(s)
- J K Ploos van Amstel
- The Hemostasis and Thrombosis Research Unit, Department of Hematology, Leiden University Hospital, Leiden, The Netherlands
| | - A L van der Zander
- The Hemostasis and Thrombosis Research Unit, Department of Hematology, Leiden University Hospital, Leiden, The Netherlands
| | - E Bakker
- Department of Human Genetics, Leiden University Hospital, Leiden, The Netherlands
| | - P H Reitsma
- The Hemostasis and Thrombosis Research Unit, Department of Hematology, Leiden University Hospital, Leiden, The Netherlands
| | - R M Bertina
- The Hemostasis and Thrombosis Research Unit, Department of Hematology, Leiden University Hospital, Leiden, The Netherlands
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Van der Poel C, Reesink H, Mauser-Bunschoten E, Kaufmann R, Leentvar-Kuypers A, Chamuleau R, Schaasberg W, Bakker E, Exel-Oehlers P, Theobalds I, Van Boven J, Cameron A, Lelie P. Prevalence of Anti-HCV Antibodies Confirmed by Recombinant Immunoblot in Different Population Subsets in The Netherlands. Vox Sang 2017. [DOI: 10.1159/000461310] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Guazzelli A, Bakker E, Sotgia F, Listanti M, Krstic-Demonacos M, Mutti L. DKK1 stabilization as a new malignant pleural mesothelioma therapeutic avenue. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx093.002] [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: 11/13/2022] Open
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Heijtel DFR, Petersen ET, Mutsaerts HJMM, Bakker E, Schober P, Stevens MF, van Berckel BNM, Majoie CBLM, Booij J, van Osch MJP, van Bavel ET, Boellaard R, Lammertsma AA, Nederveen AJ. Quantitative agreement between [(15)O]H2O PET and model free QUASAR MRI-derived cerebral blood flow and arterial blood volume. NMR Biomed 2016; 29:519-526. [PMID: 26876426 DOI: 10.1002/nbm.3480] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Revised: 11/13/2015] [Accepted: 12/08/2015] [Indexed: 06/05/2023]
Abstract
The purpose of this study was to assess whether there was an agreement between quantitative cerebral blood flow (CBF) and arterial cerebral blood volume (CBVA) measurements by [(15)O]H2O positron emission tomography (PET) and model-free QUASAR MRI. Twelve healthy subjects were scanned within a week in separate MRI and PET imaging sessions, after which quantitative and qualitative agreement between both modalities was assessed for gray matter, white matter and whole brain region of interests (ROI). The correlation between CBF measurements obtained with both modalities was moderate to high (r(2): 0.28-0.60, P < 0.05), although QUASAR significantly underestimated CBF by 30% (P < 0.001). CBVA was moderately correlated (r(2): 0.28-0.43, P < 0.05), with QUASAR yielding values that were only 27% of the [(15)O]H2O-derived values (P < 0.001). Group-wise voxel statistics identified minor areas with significant contrast differences between [(15)O]H2O PET and QUASAR MRI, indicating similar qualitative CBVA and CBF information by both modalities. In conclusion, the results of this study demonstrate that QUASAR MRI and [(15)O]H2O PET provide similar CBF and CBVA information, but with systematic quantitative discrepancies.
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Affiliation(s)
- D F R Heijtel
- Department of Radiology, Academic Medical Center, Amsterdam, the Netherlands
| | - E T Petersen
- Department of Radiology, University Medical Center Utrecht, Utrecht, the Netherlands
| | - H J M M Mutsaerts
- Department of Radiology, Academic Medical Center, Amsterdam, the Netherlands
| | - E Bakker
- Department of Radiology & Nuclear Medicine, VU University Medical Center, Amsterdam, the Netherlands
| | - P Schober
- Department of Anesthesiology, VU University Medical Center, Amsterdam, the Netherlands
| | - M F Stevens
- Department of Anesthesiology, Academic Medical Center, Amsterdam, the Netherlands
| | - B N M van Berckel
- Department of Radiology & Nuclear Medicine, VU University Medical Center, Amsterdam, the Netherlands
| | - C B L M Majoie
- Department of Radiology, Academic Medical Center, Amsterdam, the Netherlands
| | - J Booij
- Department of Nuclear Medicine, Academic Medical Center, Amsterdam, the Netherlands
| | - M J P van Osch
- C.J. Gorter Center for High Field MRI, Department of Radiology, Leiden University Medical Center, Leiden, the Netherlands
| | - E T van Bavel
- Department of Biomedical Engineering and Physics, Academic Medical Center, Amsterdam, the Netherlands
| | - R Boellaard
- Department of Radiology & Nuclear Medicine, VU University Medical Center, Amsterdam, the Netherlands
| | - A A Lammertsma
- Department of Radiology & Nuclear Medicine, VU University Medical Center, Amsterdam, the Netherlands
| | - A J Nederveen
- Department of Radiology, Academic Medical Center, Amsterdam, the Netherlands
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Thubert T, Bakker E, Fritel X. Rééducation pelvi-périnéale et troubles de la statique pelvienne de la femme. ACTA ACUST UNITED AC 2015; 43:389-94. [DOI: 10.1016/j.gyobfe.2015.03.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Accepted: 03/30/2015] [Indexed: 10/23/2022]
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10
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Mistlberger G, Pawlak M, Bakker E, Klimant I. Photodynamic optical sensor for buffer capacity and pH based on hydrogel-incorporated spiropyran. Chem Commun (Camb) 2015; 51:4172-5. [DOI: 10.1039/c4cc07821g] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The kinetics of a light activated proton extraction correlates with the buffer capacity of a sample at a given pH.
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Affiliation(s)
- G. Mistlberger
- Graz University of Technology
- Institue of Analytical Chemistry and Food Chemistry
- 8010 Graz
- Austria
| | - M. Pawlak
- University of Geneva
- Department of Inorganic and Analytical Chemistry
- 1211 Geneva 4
- Switzerland
| | - E. Bakker
- University of Geneva
- Department of Inorganic and Analytical Chemistry
- 1211 Geneva 4
- Switzerland
| | - I. Klimant
- Graz University of Technology
- Institue of Analytical Chemistry and Food Chemistry
- 8010 Graz
- Austria
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Steenstrup B, Giralte F, Bakker E, Grise P. [Evaluation of the electromyography activity of pelvic floor muscle during postural exercises using the Wii Fit Plus©. Analysis and perspectives in rehabilitation]. Prog Urol 2014; 24:1099-105. [PMID: 25450755 DOI: 10.1016/j.purol.2014.09.046] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Revised: 09/23/2014] [Accepted: 09/23/2014] [Indexed: 11/18/2022]
Abstract
INTRODUCTION The aim of this work was to evaluate the effect of postural awareness by using the Wii Fit Plus© on the quality of the baseline (automatic) activity of the pelvic floor muscles (PFM) measured by intravaginal surface electromyography (sEMG). METHODS Four healthy continent female subjects, all able to perform a voluntary contraction, undertook 2 sets of 3 various exercises offered by the software Wii Fit Plus© using the Wii balance board© (WBB): one set without any visual control and the second set with postural control and sEMG visual feedback. Simultaneously, we recorded the sEMG activity of the PFM. RESULTS Mean baseline activity of PFM in standing position at start was 2.87 mV, at submaximal voluntary contraction the sEMG activity raised at a mean of 14.43 mV (7.87-21.89). In the first set of exercises on the WBB without any visual feedback, the automatic activity of the PFM increased from 2.87 mV to 8.75 mV (7.96-9.59). In the second set, with visual postural and sEMG control, mean baseline sEMG activity even raised at 11.39 mV (10.17-11.58). CONCLUSION Among women able of a voluntary contraction of PFM, visualisation of posture with the help of the WBB and of sEMG activity of the PFM during static and dynamic Wii Fit Plus© activities, may improve the automatic activation of the PFMs. LEVEL OF EVIDENCE 4.
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Affiliation(s)
- B Steenstrup
- Médipôle du Rouvray, 76800 Saint-Etienne-du-Rouvray, France.
| | - F Giralte
- Service d'urologie, CHU de Rouen, 76000 Rouen, France
| | - E Bakker
- HE L de Vinci - IES Parnasse-deux Alice, 1200 Bruxelles, Belgique
| | - P Grise
- Service d'urologie, CHU de Rouen, 76000 Rouen, France
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12
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Reinards THCM, Albers HM, Brinkman DMC, Kamphuis SSM, van Rossum MAJ, Girschick HJ, Wouters C, Hoppenreijs EPAH, Saurenmann RK, Hinks A, Ellis JA, Bakker E, Verduijn W, Slagboom P, Huizinga TWJ, Toes REM, Houwing-Duistermaat JJ, ten Cate R, Schilham MW. CD226 (DNAM-1) is associated with susceptibility to juvenile idiopathic arthritis. Ann Rheum Dis 2014; 74:2193-8. [PMID: 25057181 DOI: 10.1136/annrheumdis-2013-205138] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2013] [Accepted: 07/11/2014] [Indexed: 01/08/2023]
Abstract
OBJECTIVES Juvenile idiopathic arthritis (JIA) is considered a complex genetic autoimmune disease. We investigated the association of genetic variants previously implicated in JIA, autoimmunity and/or immunoregulation, with susceptibility to JIA. METHODS A genetic association study was performed in 639 JIA patients and 1613 healthy controls of northwest European descent. Ninety-three single nucleotide polymorphisms (SNP) were genotyped in a candidate gene approach. Results of the entire JIA patient group (all subtypes) were compared with results obtained, alternatively, with a clinically homogeneous patient group including only oligoarticular and rheumatoid factor (RF) negative polyarticular JIA patients (n=493). Meta-analyses were performed for all SNPs that have been typed in other Caucasian JIA cohorts before. RESULTS SNPs in or near PTPN22, VTCN1, the IL2-IL21 region, ANKRD55 and TNFA were confirmed to be associated with JIA (p<0.05), strengthening the evidence for involvement of these genes in JIA. In the majority of these replicated SNPs, effect sizes were larger when analysing a homogeneous patient cohort than when analysing all subtypes. We identified two novel associations with oligoarticular and RF-negative polyarticular JIA: CD226 rs763361 (OR 1.30, 95% CI 1.12 to 1.51, p=0.0006) and CD28 rs1980422 (OR 1.29, 95% CI 1.07 to 1.55, p=0.008). Meta-analyses including reported studies confirmed the association of both SNPs with susceptibility to JIA (OR 1.16, p=0.001 and OR 1.18, p=0.001, for rs763361 and rs1980422, respectively). CONCLUSIONS The CD226 gene has been identified as novel association with JIA, and a SNP near CD28 as a suggestive association. Both genes are probable candidate risk factors, since they are involved in costimulation of T cells.
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Affiliation(s)
- T H C M Reinards
- Department of Pediatrics/Pediatric Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | - H M Albers
- Department of Pediatrics/Pediatric Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | - D M C Brinkman
- Department of Pediatrics/Pediatric Rheumatology, Rijnland Hospital, Leiderdorp, The Netherlands
| | - S S M Kamphuis
- Department of Pediatrics/Pediatric Rheumatology, Erasmus MC Sophia Children's Hospital, Rotterdam, The Netherlands
| | - M A J van Rossum
- Department of Pediatrics/Pediatric Rheumatology, Academic Medical Centre/Emma Children's Hospital and Reade (Jan van Breemen location), Amsterdam, The Netherlands
| | - H J Girschick
- Vivantes Children's Hospital, Berlin-Friedrichshain, Germany
| | - C Wouters
- University Hospital Gasthuisberg, Leuven, Belgium
| | - E P A H Hoppenreijs
- Department of Pediatrics/Pediatric Rheumatology, St Maartenskliniek and Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - R K Saurenmann
- Zürich University Children's Hospital, Zürich, Switzerland
| | - A Hinks
- Arthritis Research UK Epidemiology Unit, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
| | - J A Ellis
- Department of Pediatrics, The University of Melbourne, Melbourne, Australia Murdoch Childrens Research Institute, Royal Children's Hospital, Parkville, Australia
| | - E Bakker
- Centre for Human and Clinical Genetics/Laboratory for Diagnostic Genome Analysis, Leiden University Medical Center, Leiden, The Netherlands
| | - W Verduijn
- Department of Immunohematology and Bloodtransfusion, Leiden University Medical Center, Leiden, The Netherlands
| | - P Slagboom
- Department of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands
| | - T W J Huizinga
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | - R E M Toes
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | | | - R ten Cate
- Department of Pediatrics/Pediatric Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | - M W Schilham
- Department of Pediatrics/Laboratory for Immunology, Leiden University Medical Center, Leiden, The Netherlands
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Heijtel DFR, Mutsaerts HJMM, Bakker E, Schober P, Stevens MF, Petersen ET, van Berckel BNM, Majoie CBLM, Booij J, van Osch MJP, Vanbavel E, Boellaard R, Lammertsma AA, Nederveen AJ. Accuracy and precision of pseudo-continuous arterial spin labeling perfusion during baseline and hypercapnia: a head-to-head comparison with ¹⁵O H₂O positron emission tomography. Neuroimage 2014; 92:182-92. [PMID: 24531046 DOI: 10.1016/j.neuroimage.2014.02.011] [Citation(s) in RCA: 114] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2013] [Revised: 01/28/2014] [Accepted: 02/03/2014] [Indexed: 11/18/2022] Open
Abstract
Measurements of the cerebral blood flow (CBF) and cerebrovascular reactivity (CVR) provide useful information about cerebrovascular condition and regional metabolism. Pseudo-continuous arterial spin labeling (pCASL) is a promising non-invasive MRI technique to quantitatively measure the CBF, whereas additional hypercapnic pCASL measurements are currently showing great promise to quantitatively assess the CVR. However, the introduction of pCASL at a larger scale awaits further evaluation of the exact accuracy and precision compared to the gold standard. (15)O H₂O positron emission tomography (PET) is currently regarded as the most accurate and precise method to quantitatively measure both CBF and CVR, though it is one of the more invasive methods as well. In this study we therefore assessed the accuracy and precision of quantitative pCASL-based CBF and CVR measurements by performing a head-to-head comparison with (15)O H₂O PET, based on quantitative CBF measurements during baseline and hypercapnia. We demonstrate that pCASL CBF imaging is accurate during both baseline and hypercapnia with respect to (15)O H₂O PET with a comparable precision. These results pave the way for quantitative usage of pCASL MRI in both clinical and research settings.
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Affiliation(s)
- D F R Heijtel
- Department of Radiology, Academic Medical Center, Amsterdam, The Netherlands.
| | - H J M M Mutsaerts
- Department of Radiology, Academic Medical Center, Amsterdam, The Netherlands
| | - E Bakker
- Department of Radiology and Nuclear Medicine, VU University Medical Center, Amsterdam, The Netherlands
| | - P Schober
- Department of Anesthesiology, VU University Medical Center, Amsterdam, The Netherlands
| | - M F Stevens
- Department of Anesthesiology, Academic Medical Center, Amsterdam, The Netherlands
| | - E T Petersen
- Department of Radiology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - B N M van Berckel
- Department of Radiology and Nuclear Medicine, VU University Medical Center, Amsterdam, The Netherlands
| | - C B L M Majoie
- Department of Radiology, Academic Medical Center, Amsterdam, The Netherlands
| | - J Booij
- Department of Nuclear Medicine, Academic Medical Center, Amsterdam, The Netherlands
| | - M J P van Osch
- C.J. Gorter Center for High Field MRI, Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands
| | - E Vanbavel
- Department of Biomedical Engineering and Physics, Academic Medical Center, Amsterdam, The Netherlands
| | - R Boellaard
- Department of Radiology and Nuclear Medicine, VU University Medical Center, Amsterdam, The Netherlands
| | - A A Lammertsma
- Department of Radiology and Nuclear Medicine, VU University Medical Center, Amsterdam, The Netherlands
| | - A J Nederveen
- Department of Radiology, Academic Medical Center, Amsterdam, The Netherlands
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Albers HM, Reinards THCM, Brinkman DMC, Kamphuis SSM, van Rossum MAJ, Hoppenreijs EPAH, Girschick HJ, Wouters C, Saurenmann RK, Bakker E, Verduijn W, Slagboom P, Huizinga TWJ, Toes REM, Houwing-Duistermaat JJ, ten Cate R, Schilham MW. Genetic variation in VTCN1 (B7-H4) is associated with course of disease in juvenile idiopathic arthritis. Ann Rheum Dis 2013; 73:1198-201. [PMID: 24347572 DOI: 10.1136/annrheumdis-2013-204466] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
OBJECTIVE The course of disease in juvenile idiopathic arthritis (JIA) is unpredictable with episodes of activity and remission. In order to identify predictive factors, 93 SNPs, JIA subtype, age at onset and ANA status were studied in relation to disease course. METHODS Genetic and clinical parameters were analysed in a cohort of 272 Caucasian patients with persistent oligoarthritis (n=129), extended oligoarthritis (n=57) and rheumatoid factor negative polyarthritis (n=86). Categories of disease course (remitting (n=65), intermediate (n=96) and unremitting (n=111)) were designed based on the cumulative time spent in active disease in the first 2 years. RESULTS Univariate analysis revealed association of the course of disease with JIA subtype (p=5.7*10(-5)) and three SNPs; VTCN1 rs10 923 223 (p=4.4*10(-5)), VTCN1 rs12 046 117 (p=0.017) and CDK6 rs42 041 (p=0.038). In a subsequent multivariate ordinal logistic regression analysis, VTCN1 rs10 923 223 (OR 0.41, 95%-CI 0.26 to 0.63) and JIA subtype (OR 3.8, 95%-CI 2.0 to 7.2; OR 2.5, 95%-CI 1.4 to 4.2, for extended oligoarthritis and RF-negative polyarthritis vs persistent oligoarthritis, respectively) were the strongest independent factors for course of disease. CONCLUSIONS This study provides evidence that VTCN1, encoding B7-H4, is associated with course of disease in selected subtypes of JIA. VTCN1 might be useful in predicting the course of disease.
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Affiliation(s)
- H M Albers
- Department of Paediatrics/Paediatric Rheumatology, Leiden University Medical Center, , Leiden, The Netherlands
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15
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Kaufmann JO, Krapels IPC, Van Brussel BTJ, Zekveld-Vroon RC, Oosterwijk JC, van Erp F, van Echtelt J, Zwijnenburg PJG, Petrij F, Bakker E, Giordano PC. After the introduction into the national newborn screening program: who is receiving genetic counseling for hemoglobinopathies in the Netherlands? Public Health Genomics 2013; 17:16-22. [PMID: 24216604 DOI: 10.1159/000355223] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2013] [Accepted: 08/23/2013] [Indexed: 12/31/2022] Open
Abstract
OBJECTIVE Universal newborn screening for hemoglobinopathies started in The Netherlands in 2007. Herewith severe conditions, such as sickle cell disease, β-thalassemia major and hemoglobin H disease are putatively identified. Additionally, at least 1,800 carriers of hemoglobin variants associated with severe conditions in homozygote or compound heterozygote forms are identified yearly. Thus far, approximately 60 patients and 800 healthy sickle cell (HbS) carriers are reported each year among 180,000 newborns. Results are sent to the general practitioner with the recommendation to inform and diagnose both parents of the healthy carriers to exclude genetic risk, while patients and their parents are referred directly to a pediatrician. This study was performed to determine how often parents of identified carriers and affected newborns are seen in genetic centers for counseling. METHODS In this retrospective study, we collected anonymized data from 7 of the 8 Dutch clinical genetic centers from January 1, 2007, until December 31, 2010. RESULTS After an initial general increase in total counseling intakes, a decline was noticed in the third year, while the requests for prenatal diagnoses remained relatively stable. In 2007 and 2013, genetic counselors were asked for self-reported knowledge. They found hemoglobinopathy counseling complex, but by 2013, they indicated they had acquired sufficient knowledge on most hemoglobinopathy aspects. CONCLUSION We could not observe a significant increase in genetic counseling for hemoglobinopathy after its introduction into newborn screening. Although 120 HbS carriers and 60 patients are expected to be born from couples at risk annually, only 33 at risk couples out of 540 families of diagnosed newborns received optimal care and information at a genetics center in 4 years.
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Affiliation(s)
- J O Kaufmann
- The Hemoglobinopathies Laboratory, Department of Human and Clinical Genetics, Leiden University Medical Center, Leiden, The Netherlands
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Pawlak M, Grygolowicz-Pawlak E, Crespo GA, Mistlberger G, Bakker E. PVC-Based Ion-Selective Electrodes with Enhanced Biocompatibility by Surface Modification with “Click” Chemistry. ELECTROANAL 2013. [DOI: 10.1002/elan.201300212] [Citation(s) in RCA: 24] [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: 11/09/2022]
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Slootweg EJ, Spiridon LN, Roosien J, Butterbach P, Pomp R, Westerhof L, Wilbers R, Bakker E, Bakker J, Petrescu AJ, Smant G, Goverse A. Structural determinants at the interface of the ARC2 and leucine-rich repeat domains control the activation of the plant immune receptors Rx1 and Gpa2. Plant Physiol 2013; 162:1510-28. [PMID: 23660837 PMCID: PMC3707565 DOI: 10.1104/pp.113.218842] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Accepted: 05/07/2013] [Indexed: 05/19/2023]
Abstract
Many plant and animal immune receptors have a modular nucleotide-binding-leucine-rich repeat (NB-LRR) architecture in which a nucleotide-binding switch domain, NB-ARC, is tethered to a LRR sensor domain. The cooperation between the switch and sensor domains, which regulates the activation of these proteins, is poorly understood. Here, we report structural determinants governing the interaction between the NB-ARC and LRR in the highly homologous plant immune receptors Gpa2 and Rx1, which recognize the potato cyst nematode Globodera pallida and Potato virus X, respectively. Systematic shuffling of polymorphic sites between Gpa2 and Rx1 showed that a minimal region in the ARC2 and N-terminal repeats of the LRR domain coordinate the activation state of the protein. We identified two closely spaced amino acid residues in this region of the ARC2 (positions 401 and 403) that distinguish between autoactivation and effector-triggered activation. Furthermore, a highly acidic loop region in the ARC2 domain and basic patches in the N-terminal end of the LRR domain were demonstrated to be required for the physical interaction between the ARC2 and LRR. The NB-ARC and LRR domains dissociate upon effector-dependent activation, and the complementary-charged regions are predicted to mediate a fast reassociation, enabling multiple rounds of activation. Finally, we present a mechanistic model showing how the ARC2, NB, and N-terminal half of the LRR form a clamp, which regulates the dissociation and reassociation of the switch and sensor domains in NB-LRR proteins.
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Affiliation(s)
- Erik J Slootweg
- Laboratory of Nematology, Department of Plant Sciences, Wageningen University, 6708 PB Wageningen, The Netherlands.
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19
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Kaufmann JO, Smit JW, Huisman W, Idema RN, Bakker E, Giordano PC. Basic haemoglobinopathy diagnostics in Dutch laboratories; providing an informative test result. Int J Lab Hematol 2012; 35:428-35. [PMID: 23241064 DOI: 10.1111/ijlh.12038] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [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: 07/03/2012] [Accepted: 10/09/2012] [Indexed: 01/19/2023]
Abstract
INTRODUCTION After a first survey in 2001, the Dutch Association of Hematological Laboratory Research (VHL) advised its members to adopt a basic protocol for haemoglobinopathy carrier detection and to provide genetic information with all positive results to allow health-care professionals to inform carriers about potential genetic risks. This article reports on the compliance with these recommendations and their consequences. METHODS Clinical chemists of all 106 Dutch laboratories were invited to answer a survey on patient population, diagnostic techniques used, (self-reported) knowledge, use and effect of the additional information. RESULTS The average increase in diagnostic output was over 60% and the recommended basic protocol was applied by 65% of the laboratories. Over 84% of the laboratories reported to be aware of the additional recommendations and 77% to be using them. Most laboratories with limited diagnostic requests were still sending their cases to other laboratories and included the genetic information received from these laboratories in their diagnostic reports. The effect of information on subsequent 'family analysis' was estimated to be between 26 and 50%. CONCLUSIONS The present study shows an increase in diagnostic potential for haemoglobinopathy over the last decade, especially in the larger cities. Low 'family testing' rates were mostly found in areas with lower carrier prevalence or associated with local reluctance to pass the information to carriers. In spite of a dramatic improvement, too many carriers are still not informed because of lack of awareness among health-care providers and more education is needed.
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Affiliation(s)
- J O Kaufmann
- Hemoglobinopathies Laboratory, LDGA, Clinical Genetics, Leiden University Medical Center, The Netherlands.
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20
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Schaller U, Bakker E, Spichiger UE, Pretsch E. Nitrite-selective microelectrodes. Talanta 2012; 41:1001-5. [PMID: 18966028 DOI: 10.1016/0039-9140(94)e0048-v] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/1994] [Revised: 02/02/1994] [Accepted: 02/03/1994] [Indexed: 11/26/2022]
Abstract
The development of nitrite-selective liquid membrane microelectrodes based on a synthetic charged ionophore is described. The addition of potassium tetrakis(4-chlorophenyl)borate and poly(vinyl chloride) to the membrane phase is essential to lower the ohmic resistance and to prolong the lifetime of the microelectrodes. The detection limits for sodium nitrite solutions without and with an ion background of 0.1M chloride are 10(-5.1) and 10(-4.2)M, respectively. The comparison with macroelectrodes shows that the miniaturization reduces, to some extent, the selectivity and the slopes of the EMF response functions.
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Affiliation(s)
- U Schaller
- Department of Organic Chemistry, Swiss Federal Institute of Technology (ETH), Universitätstrasse 16, CH-8092 Zürich, Switzerland
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21
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Nägele M, Bakker E, Pretsch E. General description of the simultaneous response of potentiometric ionophore-based sensors to ions of different charge. Anal Chem 2012; 71:1041-8. [PMID: 21662773 DOI: 10.1021/ac980962c] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The response of ion-selective membrane electrodes is usually still described with the semiempirical Nicolskii-Eisenman equation although it cannot correctly reproduce experimental data if ions of different charges are involved. The recently published self-consistent model that was derived for two ions of any charges is now extended to any number of ions of any charge. One single explicit equation is here given for the first time for any number of monovalent, divalent, and trivalent ions. Deviations relative to the Nicolskii-Eisenman equation are shown to be especially high at low interferences and bias calibrations if done in a mixed solution of a target sample as well as multivariate calibrations with sensor arrays.
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Affiliation(s)
- M Nägele
- Department of Organic Chemistry, Swiss Federal Institute of Technology (ETH), CH-8092 Zürich, Switzerland, and Department of Chemistry, Auburn University, Auburn, Alabama 36849
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Stijnis C, Kroes WGM, Balkassmi S, Marijt EWA, van Rossum AP, Bakker E, Vlasveld LT. No evidence for JAK2(V617F) mutation in monoclonal B cells in 2 patients with polycythaemia vera and concurrent monoclonal B cell disorder. Acta Haematol 2012; 128:183-6. [PMID: 22890406 DOI: 10.1159/000338831] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2011] [Accepted: 04/17/2012] [Indexed: 11/19/2022]
Abstract
Occurrence of Philadelphia chromosome-negative myeloproliferative neoplasms (Ph(-) MPN) and lymphoproliferative disorders, like B cell chronic lymphocytic leukaemia (B-CLL), in the same patient is rare. JAK2(V617F) mutation was recently introduced as a powerful diagnostic tool for Ph(-) MPN. JAK2(V617F) mutation is not present in B-CLL. In 4 previously reported patients with JAK2(V617F)-positive Ph(-) MPN and B-CLL there was no definitive proof of JAK2(V617F) mutation in B-CLL cells, although this was suggested in 1 patient. We present 2 patients with JAK2(V617F)-positive polycythaemia vera who subsequently developed a monoclonal B cell disorder. The granulocytes were separated from the mononuclear cells by centrifugation on density gradient. Using an ARIA-SORP sorter, the CD20+/CD5+ B cells were separated from the CD20+/CD5- B cells, T cells, NK cells and monocytes. On each of the fractions JAK2(V617F) mutation was analysed by allele-specific competitive blocker-PCR. In both patients JAK2(V617F) mutation was present in granulocytes confirming the clinical diagnosis of polycythaemia vera. We did not detect the JAK2(V617F) mutation in the CD20+/CD5+ B cells but detected it in CD20+/CD5- B cells, T and NK cells, indicating a lymphoid subdifferentiation of the JAK2(V617F) MPN clonality. JAK2(V617F) MPN and monoclonal B cell disorder can coexist but there is no evidence that the proliferative behaviour of these B cells is mediated through the JAK2(V617F) mutation.
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Affiliation(s)
- C Stijnis
- Department of Internal Medicine, Leiden University Medical Center, The Netherlands.
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23
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Suppa M, Elliott F, Mikeljevic JS, Mukasa Y, Chan M, Leake S, Karpavicius B, Haynes S, Bakker E, Peris K, Barrett JH, Bishop DT, Newton Bishop JA. The determinants of periorbital skin ageing in participants of a melanoma case-control study in the U.K. Br J Dermatol 2012; 165:1011-21. [PMID: 21787368 PMCID: PMC3202027 DOI: 10.1111/j.1365-2133.2011.10536.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND Skin ageing is said to be caused by multiple factors. The relationship with sun exposure is of particular interest because the detrimental cutaneous effects of the sun may be a strong motivator to sun protection. We report a study of skin ageing in participants of an epidemiological study of melanoma. OBJECTIVES To determine the predictors of periorbital cutaneous ageing and whether it could be used as an objective marker of sun exposure. METHODS Photographs of the periorbital skin in 1341 participants were graded for wrinkles, degree of vascularity and blotchy pigmentation and the resultant data assessed in relation to reported sun exposure, sunscreen use, body mass index (BMI), smoking and the melanocortin 1 receptor (MC1R) gene status. Data were analysed using proportional odds regression. RESULTS Wrinkling was associated with age and heavy smoking. Use of higher sun-protection factor sunscreen was protective (P = 0·01). Age, male sex, MC1R variants ('r', P=0·01; 'R', P=0·02), higher reported daily sun exposure (P=0·02), increased BMI (P=0·01) and smoking (P=0·02) were risk factors for hypervascularity. Blotchy pigmentation was associated with age, male sex, higher education and higher weekday sun exposure (P=0·03). More frequent sunscreen use (P=0·02) and MC1R variants ('r', P=0·03; 'R', P=0·001) were protective. CONCLUSIONS Periorbital wrinkling is a poor biomarker of reported sun exposure. Vascularity is a better biomarker as is blotchy pigmentation, the latter in darker-skinned individuals. In summary, male sex, sun exposure, smoking, obesity and MC1R variants were associated with measures of cutaneous ageing. Sunscreen use showed some evidence of being protective.
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Affiliation(s)
- M Suppa
- Section of Epidemiology and Biostatistics, Leeds Cancer Research UK.
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Vleeshouwers VGAA, Finkers R, Budding D, Visser M, Jacobs MMJ, van Berloo R, Pel M, Champouret N, Bakker E, Krenek P, Rietman H, Huigen D, Hoekstra R, Goverse A, Vosman B, Jacobsen E, Visser RGF. SolRgene: an online database to explore disease resistance genes in tuber-bearing Solanum species. BMC Plant Biol 2011; 11:116. [PMID: 21851635 PMCID: PMC3166922 DOI: 10.1186/1471-2229-11-116] [Citation(s) in RCA: 7] [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] [Subscribe] [Scholar Register] [Received: 04/21/2011] [Accepted: 08/18/2011] [Indexed: 05/04/2023]
Abstract
BACKGROUND The cultivated potato (Solanum tuberosum L.) is an important food crop, but highly susceptible to many pathogens. The major threat to potato production is the Irish famine pathogen Phytophthora infestans, which causes the devastating late blight disease. Potato breeding makes use of germplasm from wild relatives (wild germplasm) to introduce resistances into cultivated potato. The Solanum section Petota comprises tuber-bearing species that are potential donors of new disease resistance genes. The aim of this study was to explore Solanum section Petota for resistance genes and generate a widely accessible resource that is useful for studying and implementing disease resistance in potato. DESCRIPTION The SolRgene database contains data on resistance to P. infestans and presence of R genes and R gene homologues in Solanum section Petota. We have explored Solanum section Petota for resistance to late blight in high throughput disease tests under various laboratory conditions and in field trials. From resistant wild germplasm, segregating populations were generated and assessed for the presence of resistance genes. All these data have been entered into the SolRgene database. To facilitate genetic and resistance gene evolution studies, phylogenetic data of the entire SolRgene collection are included, as well as a tool for generating phylogenetic trees of selected groups of germplasm. Data from resistance gene allele-mining studies are incorporated, which enables detection of R gene homologs in related germplasm. Using these resources, various resistance genes have been detected and some of these have been cloned, whereas others are in the cloning pipeline. All this information is stored in the online SolRgene database, which allows users to query resistance data, sequences, passport data of the accessions, and phylogenic classifications. CONCLUSION Solanum section Petota forms the basis of the SolRgene database, which contains a collection of resistance data of an unprecedented size and precision. Complemented with R gene sequence data and phylogenetic tools, SolRgene can be considered the primary resource for information on R genes from potato and wild tuber-bearing relatives.
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Affiliation(s)
- Vivianne GAA Vleeshouwers
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
- Centre for BioSystems Genomics, P.O. Box 98, 6700 AB, Wageningen, The Netherlands
| | - Richard Finkers
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
- Centre for BioSystems Genomics, P.O. Box 98, 6700 AB, Wageningen, The Netherlands
| | - Dirk Budding
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
| | - Marcel Visser
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
- Centre for BioSystems Genomics, P.O. Box 98, 6700 AB, Wageningen, The Netherlands
| | - Mirjam MJ Jacobs
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
- Centre for BioSystems Genomics, P.O. Box 98, 6700 AB, Wageningen, The Netherlands
| | - Ralph van Berloo
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
| | - Mathieu Pel
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
| | - Nicolas Champouret
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
| | - Erin Bakker
- Centre for BioSystems Genomics, P.O. Box 98, 6700 AB, Wageningen, The Netherlands
- Laboratory of Nematology, Wageningen University and Research Centre, Wageningen, The Netherlands
| | - Pavel Krenek
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
- Centre of the Region Hana for Biotechnological and Agricultural Research, Department of Cell Biology, Faculty of Science, Palacky University, Slechtitelu 11, Olomouc, CZ-78371, Czech Republic
| | - Hendrik Rietman
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
| | - DirkJan Huigen
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
| | - Roel Hoekstra
- Centre for BioSystems Genomics, P.O. Box 98, 6700 AB, Wageningen, The Netherlands
- Centre for Genetic Resources, Wageningen University and Research Centre, Wageningen, The Netherlands
| | - Aska Goverse
- Centre for BioSystems Genomics, P.O. Box 98, 6700 AB, Wageningen, The Netherlands
- Laboratory of Nematology, Wageningen University and Research Centre, Wageningen, The Netherlands
| | - Ben Vosman
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
- Centre for BioSystems Genomics, P.O. Box 98, 6700 AB, Wageningen, The Netherlands
| | - Evert Jacobsen
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
| | - Richard GF Visser
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
- Centre for BioSystems Genomics, P.O. Box 98, 6700 AB, Wageningen, The Netherlands
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Bakker E, Borm T, Prins P, van der Vossen E, Uenk G, Arens M, de Boer J, van Eck H, Muskens M, Vossen J, van der Linden G, van Ham R, Klein-Lankhorst R, Visser R, Smant G, Bakker J, Goverse A. A genome-wide genetic map of NB-LRR disease resistance loci in potato. Theor Appl Genet 2011; 123:493-508. [PMID: 21590328 PMCID: PMC3135832 DOI: 10.1007/s00122-011-1602-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2010] [Accepted: 04/26/2011] [Indexed: 05/14/2023]
Abstract
Like all plants, potato has evolved a surveillance system consisting of a large array of genes encoding for immune receptors that confer resistance to pathogens and pests. The majority of these so-called resistance or R proteins belong to the super-family that harbour a nucleotide binding and a leucine-rich-repeat domain (NB-LRR). Here, sequence information of the conserved NB domain was used to investigate the genome-wide genetic distribution of the NB-LRR resistance gene loci in potato. We analysed the sequences of 288 unique BAC clones selected using filter hybridisation screening of a BAC library of the diploid potato clone RH89-039-16 (S. tuberosum ssp. tuberosum) and a physical map of this BAC library. This resulted in the identification of 738 partial and full-length NB-LRR sequences. Based on homology of these sequences with known resistance genes, 280 and 448 sequences were classified as TIR-NB-LRR (TNL) and CC-NB-LRR (CNL) sequences, respectively. Genetic mapping revealed the presence of 15 TNL and 32 CNL loci. Thirty-six are novel, while three TNL loci and eight CNL loci are syntenic with previously identified functional resistance genes. The genetic map was complemented with 68 universal CAPS markers and 82 disease resistance trait loci described in literature, providing an excellent template for genetic studies and applied research in potato.
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Affiliation(s)
- Erin Bakker
- Laboratory of Nematology, Wageningen University and Research Centre, Droevendaalsesteeg 1, Wageningen, The Netherlands.
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van Westrum SMS, Hoogerwaard EM, Dekker L, Standaar TS, Bakker E, Ippel PF, Oosterwijk JC, Majoor-Krakauer DF, van Essen AJ, Leschot NJ, Wilde AAM, de Haan RJ, de Visser M, van der Kooi AJ. Cardiac abnormalities in a follow-up study on carriers of Duchenne and Becker muscular dystrophy. Neurology 2011; 77:62-6. [DOI: 10.1212/wnl.0b013e318221ad14] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Gijsbers ACJ, den Hollander NS, Helderman-van de Enden ATJM, Schuurs-Hoeijmakers JHM, Vijfhuizen L, Bijlsma EK, van Haeringen A, Hansson KBM, Bakker E, Breuning MH, Ruivenkamp CAL. X-chromosome duplications in males with mental retardation: pathogenic or benign variants? Clin Genet 2011; 79:71-8. [PMID: 20486941 DOI: 10.1111/j.1399-0004.2010.01438.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Studies to identify copy number variants (CNVs) on the X-chromosome have revealed novel genes important in the causation of X-linked mental retardation (XLMR). Still, for many CNVs it is unclear whether they are associated with disease or are benign variants. We describe six different CNVs on the X-chromosome in five male patients with mental retardation that were identified by conventional karyotyping and single nucleotide polymorphism array analysis. One deletion and five duplications ranging in size from 325 kb to 12.5 Mb were observed. Five CNVs were maternally inherited and one occurred de novo. We discuss the involvement of potential candidate genes and focus on the complexity of X-chromosomal duplications in males inherited from healthy mothers with different X-inactivation patterns. Based on size and/or the presence of XLMR genes we were able to classify CNVs as pathogenic in two patients. However, it remains difficult to decide if the CNVs in the other three patients are pathogenic or benign.
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Affiliation(s)
- A C J Gijsbers
- Center for Human and Clinical Genetics, Leiden University Medical Center (LUMC), Einthovenweg 20, Leiden, The Netherlands.
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Finkers-Tomczak A, Bakker E, de Boer J, van der Vossen E, Achenbach U, Golas T, Suryaningrat S, Smant G, Bakker J, Goverse A. Comparative sequence analysis of the potato cyst nematode resistance locus H1 reveals a major lack of co-linearity between three haplotypes in potato (Solanum tuberosum ssp.). Theor Appl Genet 2011; 122:595-608. [PMID: 21049265 PMCID: PMC3026667 DOI: 10.1007/s00122-010-1472-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2010] [Accepted: 09/30/2010] [Indexed: 05/04/2023]
Abstract
The H1 locus confers resistance to the potato cyst nematode Globodera rostochiensis pathotypes 1 and 4. It is positioned at the distal end of chromosome V of the diploid Solanum tuberosum genotype SH83-92-488 (SH) on an introgression segment derived from S. tuberosum ssp. andigena. Markers from a high-resolution genetic map of the H1 locus (Bakker et al. in Theor Appl Genet 109:146-152, 2004) were used to screen a BAC library to construct a physical map covering a 341-kb region of the resistant haplotype coming from SH. For comparison, physical maps were also generated of the two haplotypes from the diploid susceptible genotype RH89-039-16 (S. tuberosum ssp. tuberosum/S. phureja), spanning syntenic regions of 700 and 319 kb. Gene predictions on the genomic segments resulted in the identification of a large cluster consisting of variable numbers of the CC-NB-LRR type of R genes for each haplotype. Furthermore, the regions were interspersed with numerous transposable elements and genes coding for an extensin-like protein and an amino acid transporter. Comparative analysis revealed a major lack of gene order conservation in the sequences of the three closely related haplotypes. Our data provide insight in the evolutionary mechanisms shaping the H1 locus and will facilitate the map-based cloning of the H1 resistance gene.
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Helderman-van den Enden ATJM, van den Bergen JC, Breuning MH, Verschuuren JJGM, Tibben A, Bakker E, Ginjaar HB. Duchenne/Becker muscular dystrophy in the family: have potential carriers been tested at a molecular level? Clin Genet 2010; 79:236-42. [DOI: 10.1111/j.1399-0004.2010.01579.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Helderman-van den Enden A, van den Bergen J, Breuning M, Verschuuren J, Tibben A, Bakker E, Ginjaar H. P4.10 Duchenne/Becker in the family: are women aware of the potential risks? Neuromuscul Disord 2010. [DOI: 10.1016/j.nmd.2010.07.206] [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: 11/30/2022]
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Gijsbers A, van Haeringen A, Bosch C, Hansson K, Verschuren M, Bakker E, Breuning M, Ruivenkamp C. A Subtle Familial Translocation t(3;21)(p26.3;q22.3): An Apparently Healthy Boy with a 3p Deletion and 21q Duplication. Cytogenet Genome Res 2010; 128:245-9. [DOI: 10.1159/000302497] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/16/2009] [Indexed: 11/19/2022] Open
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Cox FM, Boon EMJ, van der Lans CAC, Bakker E, Verschuuren JJGM, Badrising UA. TREX1 mutations are not associated with sporadic inclusion body myositis. Eur J Neurol 2010; 17:1108-9. [PMID: 20192983 DOI: 10.1111/j.1468-1331.2010.02964.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND Sporadic inclusion body myositis (sIBM) is the most frequent acquired myopathy above the age of fifty. The exact mechanism causing this disease is not known, but immune-mediated features are prominent and are probably to play a role in its pathogenesis. TREX1 gene mutations are associated with a large range of autoimmune diseases, such as systemic lupus erythematosus. We investigated whether mutations in the TREX1 gene were associated with sIBM. METHODS Fifty-four patients with sIBM were tested for TREX1 mutations by direct sequencing. RESULTS All 54 patients tested negative for pathogenic mutations in the TREX1 gene. One presumed non-pathogenic polymorphism was found in 42 out of 54 patients. CONCLUSION TREX1 mutations do not play a role in the pathogenesis of sIBM.
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Affiliation(s)
- F M Cox
- Department of Neurology, Leiden University Medical Center, Leiden, The Netherlands.
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Helderman-van den Enden ATJM, Straathof CSM, Aartsma-Rus A, den Dunnen JT, Verbist BM, Bakker E, Verschuuren JJGM, Ginjaar HB. Becker muscular dystrophy patients with deletions around exon 51; a promising outlook for exon skipping therapy in Duchenne patients. Neuromuscul Disord 2010; 20:251-4. [PMID: 20153965 DOI: 10.1016/j.nmd.2010.01.013] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2009] [Revised: 12/21/2009] [Accepted: 01/26/2010] [Indexed: 11/25/2022]
Abstract
Theoretically, 13% of patients with Duchenne muscular dystrophy may benefit from antisense-mediated skipping of exon 51 to restore the reading frame, which results in the production of a shortened dystrophin protein. We give a detailed description with longitudinal follow up of three patients with Becker muscular dystrophy with in-frame deletions in the DMD gene encompassing exon 51. Their internally deleted, but essentially functional, dystrophins are identical to those that are expected as end products in DMD patients treated with the exon 51 skipping therapy. The mild phenotype encourages further development of exon 51 skipping therapy.
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Affiliation(s)
- A T J M Helderman-van den Enden
- Center for Human and Clinical Genetics, The Leiden University Medical Center, Einthovenweg 20, 2333 ZC Leiden, The Netherlands.
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van Vliet P, Westendorp RGJ, Eikelenboom P, Comijs HC, Frölich M, Bakker E, van der Flier W, van Exel E. Parental history of Alzheimer disease associated with lower plasma apolipoprotein E levels. Neurology 2009; 73:681-7. [PMID: 19720974 DOI: 10.1212/wnl.0b013e3181b59c2e] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Variation in APOE genotype is a determinant of Alzheimer disease (AD), but the risk associated with variation in plasma apoE levels has yet to be determined. Here, we studied offspring with and without a parental history of AD to identify the effect of plasma apoE levels at middle age on the risk of late-onset AD. METHODS Some 203 offspring from 92 families with a parental history of AD were compared with 197 offspring from 97 families without a parental history of AD. APOE genotypes and plasma apoE levels were assessed in all offspring. Difference in plasma apoE level between subjects with and without a parental history of AD was calculated using robust linear regression, both stratified and adjusted for APOE genotype. RESULTS Offspring with a parental history of AD were more likely to be an APOE epsilon4 allele carrier (46% vs 21%, p < 0.001) than offspring without such a parental history. Mean plasma apoE levels strongly decreased from epsilon2 to epsilon3epsilon3 to epsilon4 carriers (p < 0.001). Offspring with a parental history of AD had lower plasma apoE levels than subjects without such a history, both in analyses adjusted for APOE genotype (difference: -0.21 mg/dL, p = 0.02) and when using standardized Z scores, when stratified for APOE genotype (difference: -0.22, p = 0.009). CONCLUSIONS Our findings suggest that lower plasma apoE levels in middle age could be a risk factor for Alzheimer disease in old age, independent of APOE genotype.
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Affiliation(s)
- P van Vliet
- Leiden University Medical Center, Department of Gerontology and Geriatrics (C2-R), PO Box 9600, 2300 RC, Leiden, The Netherlands.
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Titulaer M, Phernambucq M, Zhernakova A, van der Slik A, Wirtz P, Niks E, Martínez-Martínez P, Losen M, Bakker E, Wijmenga C, Koeleman B, De Baets M, Verschuuren J. FP59-FR-05 Genetic factors in myasthenia gravis and Lambert-Eaton myasthenic syndrome. J Neurol Sci 2009. [DOI: 10.1016/s0022-510x(09)70585-4] [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: 11/17/2022]
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Helderman-van den Enden ATJM, de Jong R, den Dunnen JT, Houwing-Duistermaat JJ, Kneppers ALJ, Ginjaar HB, Breuning MH, Bakker E. Recurrence risk due to germ line mosaicism: Duchenne and Becker muscular dystrophy. Clin Genet 2009; 75:465-72. [PMID: 19475718 DOI: 10.1111/j.1399-0004.2009.01173.x] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The presence of multiple affected offspring from apparently non-carrier parents is caused by germ line mosaicism. Although germ line mosaicism has been reported for many diseases, figures for recurrence risks are known for only a few of them. In X-linked Duchenne and Becker muscular dystrophies (DMD/BMD), the recurrence risk for non-carrier females due to germ line mosaicism has been estimated to be between 14% and 20% (95% confidence interval 3-30) if the risk haplotype is transmitted. In this study, we have analyzed 318 DMD/BMD cases in which the detected mutation was de novo with the aim of obtaining a better estimate of the 'true' number of germ line mosaics and a more precise recurrence risk. This knowledge is essential for genetic counseling. Our data indicate a recurrence risk of 8.6% (4.8-12.2) if the risk haplotype is transmitted, but there is a remarkable difference between proximal (15.6%) (4.1-27.0) and distal (6.4%) (2.1-10.6) deletions. Overall, most mutations originated in the female. Deletions occur more often on the X chromosome of the maternal grandmother, whereas point mutations occur on the X chromosome of the maternal grandfather. In unhaplotyped de novo DMD/BMD families, the risk of recurrence of the mutation is 4.3%.
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Finkers-Tomczak A, Danan S, van Dijk T, Beyene A, Bouwman L, Overmars H, van Eck H, Goverse A, Bakker J, Bakker E. A high-resolution map of the Grp1 locus on chromosome V of potato harbouring broad-spectrum resistance to the cyst nematode species Globodera pallida and Globodera rostochiensis. Theor Appl Genet 2009; 119:165-173. [PMID: 19363662 PMCID: PMC2690855 DOI: 10.1007/s00122-009-1026-1] [Citation(s) in RCA: 6] [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] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2008] [Accepted: 03/20/2009] [Indexed: 05/27/2023]
Abstract
The Grp1 locus confers broad-spectrum resistance to the potato cyst nematode species Globodera pallida and Globodera rostochiensis and is located in the GP21-GP179 interval on the short arm of chromosome V of potato. A high-resolution map has been developed using the diploid mapping population RHAM026, comprising 1,536 genotypes. The flanking markers GP21 and GP179 have been used to screen the 1,536 genotypes for recombination events. Interval mapping of the resistances to G. pallida Pa2 and G. rostochiensis Ro5 resulted in two nearly identical LOD graphs with the highest LOD score just north of marker TG432. Detailed analysis of the 44 recombinant genotypes showed that G. pallida and G. rostochiensis resistance could not be separated and map to the same location between marker SPUD838 and TG432. It is suggested that the quantitative resistance to both nematode species at the Grp1 locus is mediated by one or more tightly linked R genes that might belong to the NBS-LRR class.
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Affiliation(s)
- Anna Finkers-Tomczak
- Laboratory of Nematology, Plant Science Group, Wageningen University, Binnenhaven 5, 6709 PD Wageningen, The Netherlands
| | - Sarah Danan
- Laboratory of Nematology, Plant Science Group, Wageningen University, Binnenhaven 5, 6709 PD Wageningen, The Netherlands
- INRA UR 1052 GAFL Génétique et Amélioration des Fruits et Légumes, BP94, 84140 Montfavet, France
| | - Thijs van Dijk
- Laboratory of Nematology, Plant Science Group, Wageningen University, Binnenhaven 5, 6709 PD Wageningen, The Netherlands
| | - Amelework Beyene
- Laboratory of Nematology, Plant Science Group, Wageningen University, Binnenhaven 5, 6709 PD Wageningen, The Netherlands
| | - Liesbeth Bouwman
- Laboratory of Nematology, Plant Science Group, Wageningen University, Binnenhaven 5, 6709 PD Wageningen, The Netherlands
| | - Hein Overmars
- Laboratory of Nematology, Plant Science Group, Wageningen University, Binnenhaven 5, 6709 PD Wageningen, The Netherlands
| | - Herman van Eck
- Laboratory of Plant Breeding, Plant Science Group, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands
| | - Aska Goverse
- Laboratory of Nematology, Plant Science Group, Wageningen University, Binnenhaven 5, 6709 PD Wageningen, The Netherlands
| | - Jaap Bakker
- Laboratory of Nematology, Plant Science Group, Wageningen University, Binnenhaven 5, 6709 PD Wageningen, The Netherlands
| | - Erin Bakker
- Laboratory of Nematology, Plant Science Group, Wageningen University, Binnenhaven 5, 6709 PD Wageningen, The Netherlands
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Ginjaar I, Tuit S, Frankhuizen W, van der Kooi A, Doorn P, Sival D, Bakker E. G.P.14.02 MLPA analysis of the CAPN3 gene detects large deletions in LGMD2A patients. Neuromuscul Disord 2008. [DOI: 10.1016/j.nmd.2008.06.316] [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: 10/21/2022]
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van den Bergen J, Straathof C, Pangalila R, Broekgaarden R, Overweg-Plandsoen W, Aartsma-Rus A, Ginjaar H, Bakker E, van Ommen G, Verschuuren J. G.P.12.01 Epidemiology of the dystrophinopathies in the Netherlands. Neuromuscul Disord 2008. [DOI: 10.1016/j.nmd.2008.06.273] [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: 11/16/2022]
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Bakker E, Visser C, Guderian A, Haenen J, Breedveld R. Emergency operation on the dissected ascending aorta of an adolescent with aortic coarctation. Perfusion 2008; 22:365-7. [PMID: 18416224 DOI: 10.1177/0267659107087265] [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: 11/15/2022]
Abstract
This case report describes the successful repair of an acute dissection of the ascending aorta in a 16-year-old girl. The dissection appeared to be related to the presence of an aortic coarctation. Furthermore, a bicuspid aortic valve was found. Echocardiography was helpful for quick pre-operative diagnosis. A computed tomography (CT) scan was used post-operatively to confirm these results. At the onset of extracorporeal circulation, active drainage was applied at the femoral vein by means of a routinely built-in shunt bypassing the venous reservoir. The practical implementation of this shunt is described in this report. One femoral artery and one femoral vein were cannulated, resulting in a blood flow index of 2.21.min(-l).m(-2) which proved to be sufficient for blood supply to both the lower and the upper parts of the body. Successful percutaneous dilatation of the coarctation was performed five months after the first operation.
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Affiliation(s)
- E Bakker
- Dept. of Extracorporeal Circulation, Medical Centre Leeuwarden, The Netherlands.
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Abstract
BACKGROUND The patient with 10 or more adenomas in the colon poses a diagnostic challenge. Beside germline mutations in the APC and MUTYH genes, only four cases of mosaic APC mutations have been reported. AIM Given the relatively high frequency of de novo APC mutations in familial adenomatous polyposis (FAP), an investigation was carried out into whether the proportion of somatic mosaic APC mutations is currently underestimated. METHODS Between 1 January 1994 and 31 December 2005 germline mutation analysis was performed in 599 consecutive index patients with polyposis coli referred for diagnostic APC scanning using a combination of denaturing gradient gel electrophoresis (DGGE) and protein truncation test (PTT). Variants were analysed by direct sequencing with primers flanking those used for DGGE and PTT, and quantified using pyrosequencing. RESULTS Scrutinizing the molecular genetic results and family data of 242 index patients with pathogenic APC mutations led to the identification of 10 mosaic cases (4%). C>T transitions were observed in CGA sites in four of the 10 cases with somatic mosaicism, which is significantly more than 26 of the 232 non-mosaic cases (p = 0.02). Phenotypes of patients with somatic mosaicism ranged from an attenuated form of polyposis coli to florid polyposis with major extracolonic manifestations. CONCLUSIONS Mosaicism occurs in a significant number of APC mutations and it is estimated that one-fifth of the de novo cases of FAP are mosaic. Clinically, the severity of manifestations in offspring and the recurrence risk for siblings of apparently sporadic polyposis patients may be underestimated due to parental APC mosaicism.
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Affiliation(s)
- F J Hes
- Center for Human and Clinical Genetics, Leiden University Medical Center, Leiden, The Netherlands.
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Helderman-van den Enden A, Ginjaar H, Bakker E. G.P.9.01 Impact of prenatal diagnosis on the incidence of DMD in the Netherlands. Neuromuscul Disord 2007. [DOI: 10.1016/j.nmd.2007.06.181] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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van der Kooi AJ, Frankhuizen WS, Barth PG, Howeler CJ, Padberg GW, Spaans F, Wintzen AR, Wokke JHJ, van Ommen GJB, de Visser M, Bakker E, Ginjaar HB. Limb-girdle muscular dystrophy in the Netherlands: gene defect identified in half the families. Neurology 2007; 68:2125-8. [PMID: 17562833 DOI: 10.1212/01.wnl.0000264853.40735.3b] [Citation(s) in RCA: 37] [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] [Indexed: 11/15/2022] Open
Abstract
Pheno- and genotype correlation is attempted in a Dutch cross-sectional study on limb- girdle muscular dystrophy. Sarcoglycans, caveolin-3, calpain-3, and dysferlin were analyzed on muscle tissue. Mutation analysis of the calpain-3, caveolin-3, and fukutin-related protein gene was executed in successive order for all samples. In 51% of all families a classifying diagnosis was made. Several new mutations in LGMD2A, B, and C patients have been found in this population.
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Affiliation(s)
- A J van der Kooi
- Department of Neurology, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands.
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Krabbendam L, Bakker E, Hornstra G, van Os J. Relationship between DHA status at birth and child problem behaviour at 7 years of age. Prostaglandins Leukot Essent Fatty Acids 2007; 76:29-34. [PMID: 17074476 DOI: 10.1016/j.plefa.2006.09.004] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2006] [Revised: 07/17/2006] [Accepted: 09/17/2006] [Indexed: 11/17/2022]
Abstract
Animal studies have demonstrated behavioural effects of long-chain polyunsaturated fatty acid (LC-PUFA) deficiencies and in humans, several psychiatric disorders have been linked to abnormal essential fatty acid metabolism. The aim of this study was to examine the relationship between LC-PUFA status at birth and the later development of problem behaviour. In a sample of 393 children, higher levels of docosahexaenoic acid (DHA) at birth were associated with lower levels of internalising problem behaviour at age 7 years. The association was markedly present in the infants fed with artificial formula (n=215, Beta=-0.32, P=0.000), but absent in the infants fed with human milk (n=170, Beta=0.11, P=0.325). The associations between arachidonic acid and internalising or externalising behaviour were neither large nor significant. The results suggest that perinatal DHA status may have long-term behavioural consequences. Therefore, we suggest to include measures of problem behaviour in future trials of LC-PUFA supplementation of mothers and/or infants.
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Affiliation(s)
- L Krabbendam
- Department of Psychiatry and Neuropsychology, SEARCH, EURON, Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands.
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Hoffer MJV, Hilhorst-Hofstee Y, Knijnenburg J, Hansson KB, Engelberts AC, Laan LAEM, Bakker E, Rosenberg C. A 6Mb deletion in band 2q22 due to a complex chromosome rearrangement associated with severe psychomotor retardation, microcephaly and distinctive dysmorphic facial features. Eur J Med Genet 2006; 50:149-54. [PMID: 17223398 DOI: 10.1016/j.ejmg.2006.11.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2006] [Accepted: 11/28/2006] [Indexed: 11/28/2022]
Abstract
High-resolution analyses of complex chromosome rearrangements (CCR) have demonstrated in individuals with abnormal phenotypes that not all seemingly balanced CCRs based on G-banding are completely balanced at breakpoint level. Here we report on an apparently balanced de novo CCR involving chromosomes 2, 3 and 5 present in a 6-month-old girl. She was referred for genetic evaluation because of severe psychomotor retardation, distinctive dysmorphic features and microcephaly. A 1Mb resolution array-CGH analysis of DNA from the patient revealed a deletion of about 6Mb for chromosome 2. FISH analysis showed that the deletion interval found in band 2q22 mapped at the translocation breakpoint, and that the ZFHX1B gene, which is known to be involved in the Mowat-Wilson syndrome, is located within the deletion interval. To our knowledge this is the first case of a complex chromosomal rearrangement associated with Mowat-Wilson syndrome. Our data illustrate the important role for high-resolution investigation of apparently balanced chromosome rearrangements in patients with unexplained psychomotor retardation and/or other clinical features, and should contribute to our understanding of the mechanisms involved in chromosome rearrangement.
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Affiliation(s)
- M J V Hoffer
- Center of Human and Clinical Genetics, Department of Clinical Genetics, Leiden University Medical Center, Gebouw 2 S-6-P, Einthovenweg 20, NL-2333 ZC Leiden, The Netherlands.
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Rommers GM, Diepstraten HJM, Bakker E, Lindeman E. Shoe adaptation after amputation of the II - V phalangeal bones of the foot. Prosthet Orthot Int 2006; 30:324-9. [PMID: 17162523 DOI: 10.1080/03093640600836170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
In The Netherlands, about 50% of all amputations of the lower limb are toes and forefoot amputations. Traumata of toes and mid-foot are rare. Preservation of the foot is the primary goal for treatment. Crush injuries of the foot may be associated with prolonged morbidity. This case study presents an insole solution for the solitary first phalangeal bone after amputation of the phalangeal bones II - V. The normal adaptation for forefoot amputations is stiffening of the sole of the shoe and a rocker bar to improve the toe off phase with load reduction of the forefoot. Because the patient had to do excessive stair climbing during work another solution was chosen. As a foot orthosis, a metal soleplate was made in order to have free movement during loading and toe-off during walking. The soleplate gives safety and provides self-adjusting properties after toe off. This enables the shoe technician to make a shoe without a rocker bar or an extra stiff insole. The 0.5 mm custom-made spring-steel plate is also used as a protective in industrial safety shoes. To improve shoe adaptation more research and case reports have to be published in order to inform doctors and shoe technicians about everyday solutions to partial foot amputations.
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Affiliation(s)
- G M Rommers
- Centre for Rehabilitation, University Medical Centre, Groningen, The Netherlands.
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Lemmers RJLF, van der Wielen MJR, Bakker E, Frants RR, van der Maarel SM. Rapid and accurate diagnosis of facioscapulohumeral muscular dystrophy. Neuromuscul Disord 2006; 16:615-7; author reply 617-8. [PMID: 16938455 DOI: 10.1016/j.nmd.2006.07.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2006] [Revised: 06/02/2006] [Accepted: 07/17/2006] [Indexed: 11/21/2022]
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van Os H, Andrzejewski S, Bakker E, Barrena I, Bryan GJ, Caromel B, Ghareeb B, Isidore E, de Jong W, van Koert P, Lefebvre V, Milbourne D, Ritter E, van der Voort JNAMR, Rousselle-Bourgeois F, van Vliet J, Waugh R, Visser RGF, Bakker J, van Eck HJ. Construction of a 10,000-marker ultradense genetic recombination map of potato: providing a framework for accelerated gene isolation and a genomewide physical map. Genetics 2006; 173:1075-87. [PMID: 16582432 PMCID: PMC1526527 DOI: 10.1534/genetics.106.055871] [Citation(s) in RCA: 205] [Impact Index Per Article: 11.4] [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: 11/18/2022] Open
Abstract
An ultradense genetic linkage map with >10,000 AFLP loci was constructed from a heterozygous diploid potato population. To our knowledge, this is the densest meiotic recombination map ever constructed. A fast marker-ordering algorithm was used, based on the minimization of the total number of recombination events within a given marker order in combination with genotyping error-detection software. This resulted in "skeleton bin maps," which can be viewed as the most parsimonious marker order. The unit of distance is not expressed in centimorgans but in "bins." A bin is a position on the genetic map with a unique segregation pattern that is separated from adjacent bins by a single recombination event. Putative centromeres were identified by a strong clustering of markers, probably due to cold spots for recombination. Conversely, recombination hot spots resulted in large intervals of up to 15 cM without markers. The current level of marker saturation suggests that marker density is proportional to physical distance and independent of recombination frequency. Most chromatids (92%) recombined once or never, suggesting strong chiasma interference. Absolute chiasma interference within a chromosome arm could not be demonstrated. Two examples of contig construction and map-based cloning have demonstrated that the marker spacing was in accordance with the expected physical distance: approximately one marker per BAC length. Currently, the markers are used for genetic anchoring of a physical map of potato to deliver a sequence-ready minimal tiling path of BAC contigs of specific chromosomal regions for the potato genome sequencing consortium (http://www.potatogenome.net).
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Affiliation(s)
- Hans van Os
- Laboratory of Plant Breeding, Wageningen University, The Netherlands
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Kempers MJE, van Trotsenburg ASP, van Tijn DA, Bakker E, Wiedijk BM, Endert E, de Vijlder JJM, Vulsma T. Disturbance of the fetal thyroid hormone state has long-term consequences for treatment of thyroidal and central congenital hypothyroidism. J Clin Endocrinol Metab 2005; 90:4094-100. [PMID: 15827096 DOI: 10.1210/jc.2005-0197] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND During T(4) supplementation of patients with thyroidal (primary) congenital hypothyroidism (CH) TSH concentrations are frequently elevated despite free T(4) (FT(4)) concentrations being well within the reference range. To examine the thyroid's regulatory system, we analyzed thyroid function determinants in children with congenital and acquired thyroid disorders and in controls. METHODS Retrospectively, plasma FT(4), TSH, and T(3) concentrations were analyzed in T(4)-supplemented children aged 0.5-20.0 yr with thyroidal CH, central (secondary or tertiary) CH, or autoimmune thyroid disease and in control children with type 1 diabetes mellitus. RESULTS When TSH was within the reference range (0.4-4.0 mU/liter), mean FT(4) in thyroidal CH [1.65 ng/dl; 95% confidence interval (CI), 1.62-1.67] was significantly higher than in autoimmune thyroid disease (1.15 ng/dl; 95% CI, 1.11-1.19) and diabetes (1.08 ng/dl; 95% CI, 1.06-1.10). In central CH, when TSH was less than or equal to 0.02 mU/liter, mean FT(4) was 1.27 ng/dl (95% CI, 1.24-1.29). When FT(4) was within the reference range (0.78-1.79 ng/dl), 43% of the TSH measurements in thyroidal CH were more than 4.0 mU/liter, compared with 18% in autoimmune thyroid disease and 0% in type 1 diabetes mellitus; in central CH, 95% of TSH measurements were less than 0.4 mU/liter. CONCLUSIONS In T(4)-supplemented patients with thyroidal CH, when TSH concentrations are established within the reference range, FT(4) concentrations tend to be elevated, and vice versa. Because this phenomenon could not be observed in acquired thyroidal hypothyroidism, we hypothesize that a pre- and/or perinatal hypothyroid state shifts the setpoint of the thyroid's regulatory system. In central CH, when FT(4) concentrations are established within the reference range, the pituitary secretes only minute amounts of TSH. For monitoring T(4) supplementation, reference ranges for FT(4) and TSH should be adapted to the etiology of hypothyroidism.
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Affiliation(s)
- M J E Kempers
- Emma Children's Hospital Academic Medical Center, University of Amsterdam, Department of Pediatric Endocrinology, P.O. Box 22700, 1100 DE Amsterdam, The Netherlands.
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Rosenberg C, Knijnenburg J, Bakker E, Vianna-Morgante AM, Sloos W, Otto PA, Kriek M, Hansson K, Krepischi-Santos ACV, Fiegler H, Carter NP, Bijlsma EK, van Haeringen A, Szuhai K, Tanke HJ. Array-CGH detection of micro rearrangements in mentally retarded individuals: clinical significance of imbalances present both in affected children and normal parents. J Med Genet 2005; 43:180-6. [PMID: 15980116 PMCID: PMC2564641 DOI: 10.1136/jmg.2005.032268] [Citation(s) in RCA: 166] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
BACKGROUND The underlying causes of mental retardation remain unknown in about half the cases. Recent array-CGH studies demonstrated cryptic imbalances in about 25% of patients previously thought to be chromosomally normal. OBJECTIVE AND METHODS Array-CGH with approximately 3500 large insert clones spaced at approximately 1 Mb intervals was used to investigate DNA copy number changes in 81 mentally impaired individuals. RESULTS Imbalances never observed in control chromosomes were detected in 20 patients (25%): seven were de novo, nine were inherited, and four could not have their origin determined. Six other alterations detected by array were disregarded because they were shown by FISH either to hybridise to both homologues similarly in a presumptive deletion (one case) or to involve clones that hybridised to multiple sites (five cases). All de novo imbalances were assumed to be causally related to the abnormal phenotypes. Among the others, a causal relation between the rearrangements and an aberrant phenotype could be inferred in six cases, including two imbalances of the X chromosome, where the associated clinical features segregated as X linked recessive traits. CONCLUSIONS In all, 13 of 81 patients (16%) were found to have chromosomal imbalances probably related to their clinical features. The clinical significance of the seven remaining imbalances remains unclear. The limited ability to differentiate between inherited copy number variations which cause abnormal phenotypes and rare variants unrelated to clinical alterations currently constitutes a limitation in the use of CGH-microarray for guiding genetic counselling.
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