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Wredenhagen MS, Goldstein A, Mathieu H, Miranda V, Morali B, Santerre J, Maftei C, Delrue MA, Schmittbuhl M, Vu DD, Moldovan F, Campeau PM. The Quebec Dental Anomalies Registry: Identifying genes for rare disorders. PNAS Nexus 2023; 2:pgad196. [PMID: 37361548 PMCID: PMC10290489 DOI: 10.1093/pnasnexus/pgad196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 03/28/2023] [Accepted: 05/23/2023] [Indexed: 06/28/2023]
Abstract
There are more than 900 genetic syndromes associated with oral manifestations. These syndromes can have serious health implications, and left undiagnosed, can hamper treatment and prognosis later in life. About 6.67% of the population will develop a rare disease during their lifetime, some of which are difficult to diagnose. The establishment of a data and tissue bank of rare diseases with oral manifestations in Quebec will help medical professionals identify the genes involved, will improve knowledge on the rare genetic diseases, and will also lead to improved patient management. It will also allow samples and information sharing with other clinicians and investigators. As an example of a condition requiring additional research, dental ankylosis is a condition in which the tooth's cementum fuses to the surrounding alveolar bone. This can be secondary to traumatic injury but is often idiopathic, and the genes involved in the idiopathic cases, if any, are poorly known. To date, patients with both identified and unidentified genetic etiology for their dental anomalies were recruited through dental and genetics clinics for the study. They underwent sequencing of selected genes or exome sequencing depending on the manifestation. We recruited 37 patients and we identified pathogenic or likely pathogenic variants in WNT10A, EDAR, AMBN, PLOD1, TSPEAR, PRKAR1A, FAM83H, PRKACB, DLX3, DSPP, BMP2, TGDS. Our project led to the establishment of the Quebec Dental Anomalies Registry, which will help researchers, medical and dental practitioners alike understand the genetics of dental anomalies and facilitate research collaborations into improved standards of care for patients with rare dental anomalies and any accompanying genetic diseases.
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Affiliation(s)
- Madeleine S Wredenhagen
- CHU Sainte-Justine Research Center, 3175 Chemin de la Côte-Sainte-Catherine, Montreal, QC, Canada, H3T1C5 and University of Ottawa, 75 Laurier Ave E, Ottawa, ON, Canada K1N 6N5
| | - Andee Goldstein
- CHU Sainte-Justine Research Center, 3175 Chemin de la Côte-Sainte-Catherine, Montreal, QC, Canada, H3T1C5 and Université de Montréal, 2900 Edouard Montpetit Boulevard, Montreal, QC, Canada, H3T1C5
| | - Hélène Mathieu
- CHU Sainte-Justine Research Center, 3175 Chemin de la Côte-Sainte-Catherine, Montreal, QC, Canada, H3T1C5 and Université de Montréal, 2900 Edouard Montpetit Boulevard, Montreal, QC, Canada, H3T1C5
| | - Valancy Miranda
- Department of Pediatrics, CHU Sainte-Justine Research Center, 3175 Chemin de la Côte-Sainte-Catherine, Montreal, QC, Canada, H3T1C5
| | - Burcin Morali
- Department of Pediatrics, CHU Sainte-Justine, 3175 Chemin de la Côte-Sainte-Catherine, Montreal, QC, Canada, H3T1C5
| | - Jacinthe Santerre
- Department of Pediatrics, CHU Sainte-Justine, 3175 Chemin de la Côte-Sainte-Catherine, Montreal, QC, Canada, H3T1C5
| | - Catalina Maftei
- CHU Sainte-Justine, Genetic Service, 3175 Chemin de la Côte-Sainte-Catherine, Montreal, QC, Canada, H3T1C5
| | - Marie-Ange Delrue
- Department of Pediatrics, CHU Sainte-Justine, 3175 Chemin de la Côte-Sainte-Catherine, Montreal, QC, Canada, H3T1C5
| | - Matthieu Schmittbuhl
- Faculty of Dentistry, Department of Stomatology, Université of Montréal, 2900 Edouard Montpetit Boulevard, Montreal, QC, Canada H3T 1J4
| | - Duy Dat Vu
- Faculty of Dentistry, Université of Montréal, 2900 Edouard Montpetit Boulevard, Montreal, QC, Canada H3T 1J4
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Mathieu H, Patten SA, Aragon-Martin JA, Ocaka L, Simpson M, Child A, Moldovan F. Genetic variant of TTLL11 gene and subsequent ciliary defects are associated with idiopathic scoliosis in a 5-generation UK family. Sci Rep 2021; 11:11026. [PMID: 34040021 PMCID: PMC8155187 DOI: 10.1038/s41598-021-90155-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [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] [Received: 10/27/2020] [Accepted: 05/04/2021] [Indexed: 02/07/2023] Open
Abstract
Idiopathic scoliosis (IS) is a complex 3D deformation of the spine with a strong genetic component, most commonly found in adolescent girls. Adolescent idiopathic scoliosis (AIS) affects around 3% of the general population. In a 5-generation UK family, linkage analysis identified the locus 9q31.2-q34.2 as a candidate region for AIS; however, the causative gene remained unidentified. Here, using exome sequencing we identified a rare insertion c.1569_1570insTT in the tubulin tyrosine ligase like gene, member 11 (TTLL11) within that locus, as the IS causative gene in this British family. Two other TTLL11 mutations were also identified in two additional AIS cases in the same cohort. Analyses of primary cells of individuals carrying the c.1569_1570insTT (NM_194252) mutation reveal a defect at the primary cilia level, which is less present, smaller and less polyglutamylated compared to control. Further, in a zebrafish, the knock down of ttll11, and the mutated ttll11 confirmed its role in spine development and ciliary function in the fish retina. These findings provide evidence that mutations in TTLL11, a ciliary gene, contribute to the pathogenesis of IS.
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Affiliation(s)
- Hélène Mathieu
- CHU Sainte-Justine Research Center, 3175 Côte Sainte-Catherine, 2.17.026, Montreal, QC, H3T 1C5, Canada
| | - Shunmoogum A Patten
- INRS-Centre Armand-Frappier Santé et Biotechnologie, Laval, QC, H7V1B7, Canada
| | | | - Louise Ocaka
- Centre for Translational Omics-GOSgene, Department of Genetics and Genomic Medicine, UCL GOSH Institute of Child Health, 30 Guilford Street, London, WC1N 1EH, UK
| | - Michael Simpson
- Genetics and Molecular Medicine, King's College London, SE1 1UL, London, UK
| | - Anne Child
- Marfan Trust, NHLI, Imperial College, Guy Scadding Building, London, SW3 6LY, UK.
| | - Florina Moldovan
- CHU Sainte-Justine Research Center, 3175 Côte Sainte-Catherine, 2.17.026, Montreal, QC, H3T 1C5, Canada. .,Faculty of Dentistry, Université de Montréal, Montreal, QC, H3T 1J4, Canada.
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Hassan A, Parent S, Mathieu H, Zaouter C, Molidperee S, Bagu ET, Barchi S, Villemure I, Patten SA, Moldovan F. Adolescent idiopathic scoliosis associated POC5 mutation impairs cell cycle, cilia length and centrosome protein interactions. PLoS One 2019; 14:e0213269. [PMID: 30845169 PMCID: PMC6405090 DOI: 10.1371/journal.pone.0213269] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Accepted: 02/19/2019] [Indexed: 01/11/2023] Open
Abstract
Adolescent Idiopathic Scoliosis (AIS) is a spinal deformity that affects approximately 3 percent of human adolescents. Although the etiology and molecular basis of AIS is unclear, several genes such as POC5 have been identified as possible causes of the condition. In order to understand the role of POC5 in the pathogenesis of AIS, we investigated the subcellular localization of POC5 in cilia of cells over-expressing either the wild type (wt) or an AIS-related POC5 variant POC5A429V. Mutation of POC5 was found to alter its subcellular localization and to induce ciliary retraction. Furthermore, we observed an impaired cell-cycle progression with the accumulation of cells in the S-phase in cells expressing POC5A429V. Using immunoprecipitation coupled to mass spectrometry, we identified specific protein interaction partners of POC5, most of which were components of cilia and cytoskeleton. Several of these interactions were altered upon mutation of POC5. Altogether, our results demonstrate major cellular alterations, disturbances in centrosome protein interactions and cilia retraction in cells expressing an AIS-related POC5 mutation. Our study suggests that defects in centrosomes and cilia may underlie AIS pathogenesis.
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Affiliation(s)
- Amani Hassan
- Faculty of Dentistry, Université de Montréal, Montréal, Québec, Canada
- CHU Sainte-Justine Research Center, Montréal, Québec, Canada
| | - Stefan Parent
- CHU Sainte-Justine Research Center, Montréal, Québec, Canada
| | - Hélène Mathieu
- CHU Sainte-Justine Research Center, Montréal, Québec, Canada
| | | | | | - Edward T. Bagu
- Department of Basic Biomedical Sciences, Sanford Medical School, University of South Dakota, Vermillion, SD, United States of America
| | - Soraya Barchi
- CHU Sainte-Justine Research Center, Montréal, Québec, Canada
| | | | - Shunmoogum A. Patten
- INRS–Institut Armand-Frappier, Université du Québec, Laval, Montréal, Québec, Canada
| | - Florina Moldovan
- Faculty of Dentistry, Université de Montréal, Montréal, Québec, Canada
- CHU Sainte-Justine Research Center, Montréal, Québec, Canada
- * E-mail:
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Pinard A, Miltgen M, Blanchard A, Mathieu H, Desvignes JP, Salgado D, Fabre A, Arnaud P, Barré L, Krahn M, Grandval P, Olschwang S, Zaffran S, Boileau C, Béroud C, Collod-Béroud G. Actionable Genes, Core Databases, and Locus-Specific Databases. Hum Mutat 2016; 37:1299-1307. [PMID: 27600092 DOI: 10.1002/humu.23112] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Accepted: 08/31/2016] [Indexed: 01/04/2023]
Abstract
Adoption of next-generation sequencing (NGS) in a diagnostic context raises numerous questions with regard to identification and reports of secondary variants (SVs) in actionable genes. To better understand the whys and wherefores of these questioning, it is necessary to understand how they are selected during the filtering process and how their proportion can be estimated. It is likely that SVs are underestimated and that our capacity to label all true SVs can be improved. In this context, Locus-specific databases (LSDBs) can be key by providing a wealth of information and enabling classifying variants. We illustrate this issue by analyzing 318 SVs in 23 actionable genes involved in cancer susceptibility syndromes identified through sequencing of 572 participants selected for a range of atherosclerosis phenotypes. Among these 318 SVs, only 43.4% are reported in Human Gene Mutation Database (HGMD) Professional versus 71.4% in LSDB. In addition, 23.9% of HGMD Professional variants are reported as pathogenic versus 4.8% for LSDB. These data underline the benefits of LSDBs to annotate SVs and minimize overinterpretation of mutations thanks to their efficient curation process and collection of unpublished data.
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Affiliation(s)
| | | | | | | | | | | | - Aurélie Fabre
- Aix Marseille Univ, INSERM, GMGF, Marseille, France.,APHM, Hôpital Timone Enfants, Laboratoire de Génétique Moléculaire, Marseille, 13385, France
| | - Pauline Arnaud
- AP-HP, Hôpital Bichat, Centre National de Référence pour le syndrome de Marfan et apparentés, Paris, France.,UFR de Médecine, Diderot Paris Université Paris 7, Paris, France.,Inserm, U1148, Paris, France
| | - Laura Barré
- Aix Marseille Univ, INSERM, GMGF, Marseille, France
| | - Martin Krahn
- Aix Marseille Univ, INSERM, GMGF, Marseille, France.,APHM, Hôpital Timone Enfants, Laboratoire de Génétique Moléculaire, Marseille, 13385, France
| | - Philippe Grandval
- Aix Marseille Univ, INSERM, GMGF, Marseille, France.,AP-HM, Hôpital de la Timone, Gastroentérologie, Marseille, France
| | - Sylviane Olschwang
- Aix Marseille Univ, INSERM, GMGF, Marseille, France.,APHM, Hôpital Timone Enfants, Laboratoire de Génétique Moléculaire, Marseille, 13385, France.,Hôpital Clairval, Ramsay Générale de Santé, Marseille, France.,Hôpital Européen, Fondation Ambroise Paré, Marseille, France
| | | | - Catherine Boileau
- AP-HP, Hôpital Bichat, Centre National de Référence pour le syndrome de Marfan et apparentés, Paris, France.,UFR de Médecine, Diderot Paris Université Paris 7, Paris, France.,Inserm, U1148, Paris, France
| | - Christophe Béroud
- Aix Marseille Univ, INSERM, GMGF, Marseille, France.,APHM, Hôpital Timone Enfants, Laboratoire de Génétique Moléculaire, Marseille, 13385, France
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Miltgen M, Blanchard A, Mathieu H, Kreisler A, Jean-Pierre-Desvignes, Salgado D, Roubertie A, Barre L, Rai G, Blanck V, Frederic M, Douay X, Mazzolenni R, Charpentier P, Gonzalez V, Destée A, Béroud C, Collod-Béroud G. Novel heterozygous mutation in ANO3 responsible for craniocervical dystonia. Mov Disord 2016; 31:1251-2. [PMID: 27392807 DOI: 10.1002/mds.26717] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Revised: 05/18/2016] [Accepted: 06/05/2016] [Indexed: 11/09/2022] Open
Affiliation(s)
- Morgane Miltgen
- Aix Marseille Université, INSERM, GMGF UMR_S 910, Marseille, France
| | - Arnaud Blanchard
- Aix Marseille Université, INSERM, GMGF UMR_S 910, Marseille, France
| | - Hélène Mathieu
- Aix Marseille Université, INSERM, GMGF UMR_S 910, Marseille, France
| | - Alexandre Kreisler
- Université de Lille, CHRU de Lille, Service de Neurologie et Pathologie du Mouvement, Lille, France.,INSERM UMR-S1172, Lille, France
| | | | - David Salgado
- Aix Marseille Université, INSERM, GMGF UMR_S 910, Marseille, France
| | - Agathe Roubertie
- CHRU Montpellier, Service de Neuro-pédiatrie, Hôpital Gui de Chauliac, Montpellier, France; Institut des Neurosciences de Montpellier, U1051 de l'INSERM, Université de Montpellier, BP 74103, Montpellier, France
| | - Laura Barre
- Aix Marseille Université, INSERM, GMGF UMR_S 910, Marseille, France
| | - Ghadi Rai
- Aix Marseille Université, INSERM, GMGF UMR_S 910, Marseille, France
| | - Veronique Blanck
- Département de Génétique Médicale, Hôpital La Timone, Marseille, France
| | - Melissa Frederic
- Aix Marseille Université, INSERM, GMGF UMR_S 910, Marseille, France
| | - Xavier Douay
- Université de Lille, CHRU de Lille, Service de Neurologie et Pathologie du Mouvement, Lille, France
| | - Ronald Mazzolenni
- Université de Lille, CHRU de Lille, Service de Neurologie et Pathologie du Mouvement, Lille, France
| | | | - Victoria Gonzalez
- CHU Montpellier, Hôpital Gui de Chauliac, Service de Neurochirurgie, Montpellier, France
| | - Alain Destée
- Université de Lille, CHRU de Lille, Service de Neurologie et Pathologie du Mouvement, Lille, France.,INSERM UMR-S1172, Lille, France
| | - Christophe Béroud
- Aix Marseille Université, INSERM, GMGF UMR_S 910, Marseille, France.,Département de Génétique Médicale, Hôpital La Timone, Marseille, France
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Raynaud C, Tran-Dinh S, Bourguignon M, Syrota A, Aujard Y, Bamberger J, Broyer M, Cendron J, Courtecuisse V, Dommergues JP, Landrieu P, Lanza M, Mathieu H, Melin Y, Mselati JC, Valayer J. Acute Pyelonephritis in Children. Radionuclides in Nephrology 2015. [DOI: 10.1159/000413793] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Prabhu S, Chabardès S, Sherdil A, Devergnas A, Michallat S, Bhattacharjee M, Mathieu H, David O, Piallat B. Effect of subthalamic nucleus stimulation on penicillin induced focal motor seizures in primate. Brain Stimul 2014; 8:177-84. [PMID: 25511796 DOI: 10.1016/j.brs.2014.10.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [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: 06/03/2014] [Revised: 09/13/2014] [Accepted: 10/26/2014] [Indexed: 10/24/2022] Open
Abstract
BACKGROUND Drug-resistant motor epilepsies are particularly incapacitating for the patients. In a primate model of focal motor seizures induced by intracortical injection of penicillin, we recently showed that seizures propagated from the motor cortex towards the basal ganglia. OBJECTIVE Using the same animal model here, we hypothesized that disruption of subthalamic nucleus (STN) activity by chronic high frequency stimulation (HFS) could modify pathological excessive cortical synchronisation occurring during focal motor seizures, and therefore could reduce seizure activity. METHODS Two monkeys were chronically implanted with one electrode positioned into the STN. In each experiment, seizures were induced during 6 hours by injecting penicillin into the motor cortex. During stimulation sessions, HFS-STN was applied at the beginning of penicillin injection. RESULTS Our results indicate that HFS-STN improved focal motor seizures by delaying the occurrence of the first seizure, by decreasing the number of seizures by 47% and therefore the total time spent seizing by 53% compared to control. These results argue for a therapeutic use of HFS-STN in motor seizures because they were obtained in a very severe primate model of motor status similar to that seen in human. Furthermore, HFS-STN was much more efficient than direct cortical HFS of the epileptic focus, which we already tested in the same primate model. CONCLUSIONS The present study suggests that HFS-STN could be used as an experimental therapy when other therapeutic strategies are not possible or have failed in humans suffering from motor epilepsy but the present study still warrants controlled studies in humans.
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Affiliation(s)
- S Prabhu
- Univ Grenoble Alpes, GIN, F-38000 Grenoble, France; INSERM, U836, F-38000 Grenoble, France
| | - S Chabardès
- Univ Grenoble Alpes, GIN, F-38000 Grenoble, France; INSERM, U836, F-38000 Grenoble, France; CHU de Grenoble, Hôpital Michallon F-38000 Grenoble, France
| | - A Sherdil
- Univ Grenoble Alpes, GIN, F-38000 Grenoble, France; INSERM, U836, F-38000 Grenoble, France
| | | | | | - M Bhattacharjee
- Univ Grenoble Alpes, GIN, F-38000 Grenoble, France; INSERM, U836, F-38000 Grenoble, France
| | - H Mathieu
- UMS IRMaGe, F-38000 Grenoble, France
| | - O David
- Univ Grenoble Alpes, GIN, F-38000 Grenoble, France; INSERM, U836, F-38000 Grenoble, France
| | - B Piallat
- Univ Grenoble Alpes, GIN, F-38000 Grenoble, France; INSERM, U836, F-38000 Grenoble, France.
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Lefebvre P, Morel A, Gallart M, Taliercio T, Gil B, Allègre J, Mathieu H, Grandjean N, Damilano B, Massies J. Recombination Dynamics in Nitride Quantum Boxes and Quantum Wells for Colors Ranging from the UV to the Red. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-639-g10.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTTime-resolved photoluminescence experiments at varying temperature are performed on a series of InxGa1−xN/GaN quantum well and quantum box samples of similar compositions (0.15 < x < 0.20). The results are analyzed by using envelope-function calculations of transition energies and oscillator strengths, accounting for internal electric fields. The respective influences of localization and electric fields on radiative and nonradiative lifetimes and on the Stokes shift are deduced. The results indicate that the spatial extension of localization centers is much smaller than the size of the quantum boxes (∼10 × 3 nm, typically). The room-temperature radiative efficiency of both quantum well and quantum box samples is enhanced by replacing the topmost GaN barrier by an AlGaN one.
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Montémont G, Comtat C, Descourt P, Jan S, Leabad M, Maîtrejean S, Mathy F, Mathieu H, Monnet O, Richer JP, Rossetto O, Rostaing JP, Trébossen R, Verger L, Visvikis D. TOPASE-MED : comment repenser l’imagerie TEP grâce aux détecteurs semiconducteurs. Ing Rech Biomed 2010. [DOI: 10.1016/j.irbm.2010.02.012] [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: 10/19/2022]
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Wiegand G, Bürck J, Roth S, Mathieu H. Reaction monitoring in supercritical carbon dioxide-based processes using in-line NIR spectroscopy and on-line gas chromatography. CHEM-ING-TECH 2004. [DOI: 10.1002/cite.200490267] [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: 11/11/2022]
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Mathieu H, Le Moigne F, Panteix G, Derache P, Jouzier E. [Development of a method for determining lead blood levels with chronopotentiometry]. Ann Biol Clin (Paris) 2003; 61:667-72. [PMID: 14711607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
A potentiometric stripping analysis method for blood lead determination, using Radiometer Tracelab PSU 22, has been investigated. Hemoglobin precipitation by hydrochloric and perchloric acids mixture allows to obtain the same signal for the same lead concentrations in aqueous standards and various blood samples. Thus it is possible to use a time saving calibration procedure. Equilibration time increase improved method sensitivity and precision. The analysis time was 3 minutes per sample. The detection limit was 0.006 microM/L. The relative standard deviation was 3.6% for 1.351 microM/L and 6% for 0.203 microM/L. The results of 66 determinations obtained by this method and by graphite furnace atomic absorption spectrometry were compared (R=0.991). Potentiometric stripping analysis is less expensive and very convenient for clinical laboratories.
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Abstract
A distributed sensing system for apolar hydrocarbons is presented which is built from a polymer-clad silica fiber adapted to an optical time domain reflectometer (OTDR) set-up. OTDR measurements allow locating and detecting chemicals by measuring the time delay between short light pulses entering the fiber and discrete changes in the backscatter signals that are caused by local extraction of hydrocarbons into the fiber cladding. The light guiding properties of the fiber are affected by interaction of the extracted chemicals with the evanescent wave light field extending into the fiber cladding. Distributed sensing of pure liquid hydrocarbons (HC) and aqueous HC solutions with a commercially available mini-OTDR adapted to sensing fibers of up to 1km length could be demonstrated. A pulsed laser diode emitting at the 850 nm telecommunication wavelength was applied in the mini-OTDR to locate the HCs by analyzing the step drop (light loss) in the backscatter signal, which is induced by local refractive index (RI) increase in the silicone cladding due to the extracted HC. The prototype instrument can be applied for monitoring hydrocarbon leakage in large technical installations, such as tanks, chemical pipelines or chemical waste disposal containments.
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Affiliation(s)
- J Buerck
- Forschungszentrum Karlsruhe, Institut für Instrumentelle Analytik-IFIA, PO Box 3640, D-76021 Karlsruhe, Germany.
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Bürck J, Schlagenhof M, Roth S, Mathieu H. Kinetic evaluation method for SPME-NIR measurements of analytes with long equilibration time. ACTA ACUST UNITED AC 2001. [DOI: 10.1002/fact.1014] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Morel A, Gallart M, Taliercio T, Lefebvre P, Gil B, All�gre J, Mathieu H, Damilano B, Grandjean N, Massies J. Time-Resolved Spectroscopy of MBE-Grown InGaN/GaN Self-Formed Quantum Dots. ACTA ACUST UNITED AC 2000. [DOI: 10.1002/1521-396x(200007)180:1<375::aid-pssa375>3.0.co;2-f] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Gallart M, Morel A, Taliercio T, Lefebvre P, Gil B, All�gre J, Mathieu H, Grandjean N, Leroux M, Massies J. Scale Effects on Exciton Localization and Nonradiative Processes in GaN/AlGaN Quantum Wells. ACTA ACUST UNITED AC 2000. [DOI: 10.1002/1521-396x(200007)180:1<127::aid-pssa127>3.0.co;2-z] [Citation(s) in RCA: 34] [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: 11/06/2022]
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Agami C, Couty F, Evano G, Mathieu H. SN2′ Regio and Stereoselective Alkylation of Allylic and Propargylic Mesylates Linked to a N-Boc Oxazolidine using Organocuprates. Tetrahedron 2000. [DOI: 10.1016/s0040-4020(99)00949-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Panserat S, Sica L, Gérard N, Mathieu H, Jacqz-Aigrain E, Krishnamoorthy R. CYP2D6 polymorphism in a Gabonese population: contribution of the CYP2D6*2 and CYP2D6*17 alleles to the high prevalence of the intermediate metabolic phenotype. Br J Clin Pharmacol 1999; 47:121-4. [PMID: 10073750 PMCID: PMC2014206 DOI: 10.1046/j.1365-2125.1999.00861.x] [Citation(s) in RCA: 24] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
AIMS To determine the molecular basis of the intermediate extensive metaboliser (EM) CYP2D6 phenotype in healthy Gabonese subjects. METHODS The CYP2D6 phenotype of 154 healthy Gabonese subjects was assessed by giving the subject a single dose of 30 mg dextromethorphan, and collecting their urine for the next 8 h. The CYP2D6 genotype was determined for 50 individuals of the EM phenotypic group by Southern blotting and various PCR-based procedures aimed at identifying different CYP2D6 alleles. RESULTS We found that in the studied Gabonese population, as compared with a French population, there is significantly higher frequency of intermediate EM phenotype having lower frequency of CYP2D6 PM alleles. To clarify this discrepancy phenotype-genotype relationship was studied. We found that the CYP2D6*17 and CYP2D6*2 alleles, prevalent in this black population, are characterised by their low capacity for dextromethorphan demethylation. Our data also show that the CYP2D6*1 allele is associated with the highest in vivo activity followed by the CYP2D6*2 allele and then the CYP2D6*17 allele. CONCLUSIONS The higher frequencies of the CYP2D6*2 and CYP2D6*17 alleles than the CYP2D6*1 allele account for the high frequency of the intermediate EM phenotype in this black population. The polymorphism of the CYP2D6 enzyme activity in African populations could have important implications for use of drugs that are substrates for CYP2D6 and have a narrow therapeutic window.
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Affiliation(s)
- S Panserat
- Inserm U458 Hôpital Robert Debré, Paris, France
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Agami C, Couty F, Lam H, Mathieu H. A new access to enantiopure β-hydroxylated piperidines from N-Boc-2-acyloxazolidines. Application to the synthesis of (−)-desoxoprosopinine and (+)-pseudoconhydrine. Tetrahedron 1998. [DOI: 10.1016/s0040-4020(98)00508-0] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Abstract
Measurements were performed on reference samples (D2O-H2O mixtures) and on highly heterogeneous rocks (Vosges sandstone) with a new logging tool designed to give access to a high spatial resolution, below 1.5 cm on the vertical scale, for a toroidal sensitive volume of 20 cm3. The results were compared to measurements obtained on a clinical magnetic resonance imaging (MRI) equipment working at the same frequency (4.3 MHz). T2 differences as high as 30% were observed for the reference samples; the shortest values were obtained with the logging tool. Porosity profiles of the rock samples were also compared to reference profiles obtained with a conventional computed tomography (CT) scanner. Both nuclear magnetic resonance (NMR) measurements underevaluate porosity by 2-4% for short T2 values (< 10 ms).
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Affiliation(s)
- M Locatelli
- LETI (CEA Technologies Avancées), Grenoble, France
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Agami C, Couty F, Mathieu H. Total synthesis of (−)-desoxoprosopinine via the diastereoselective reduction of homochiral2-Acyl-N-Boc-oxazolidines. Tetrahedron Lett 1998. [DOI: 10.1016/s0040-4039(98)00646-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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22
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Calvo V, Lefebvre P, Allègre J, Bellabchara A, Mathieu H, Zhao QX, Magnea N. Evidence of the ordered growth of monomolecular ZnTe islands in CdTe/(Cd,Zn)Te quantum wells on a nominal (001) surface. Phys Rev B Condens Matter 1996; 53:R16164-R16167. [PMID: 9983523 DOI: 10.1103/physrevb.53.r16164] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Lefebvre P, Richard T, Allègre J, Mathieu H, Combette-Roos A, Granier W. Measurement of the optical band gap and crystal-field splitting in wurtzite CdTe. Phys Rev B Condens Matter 1996; 53:15440-15442. [PMID: 9983366 DOI: 10.1103/physrevb.53.15440] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Richard T, Lefebvre P, Mathieu H, Allègre J. Effects of finite spin-orbit splitting on optical properties of spherical semiconductor quantum dots. Phys Rev B Condens Matter 1996; 53:7287-7298. [PMID: 9982176 DOI: 10.1103/physrevb.53.7287] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Lefebvre P, Christol P, Mathieu H, Glutsch S. Confined excitons in semiconductors: Correlation between binding energy and spectral absorption shape. Phys Rev B Condens Matter 1995; 52:5756-5759. [PMID: 9981762 DOI: 10.1103/physrevb.52.5756] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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28
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Mathieu C, Mathieu H. Aluminum in serum determined by HPLC. Clin Chem 1995; 41:625. [PMID: 7720260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- C Mathieu
- Lab. spécialisé d'analyses de biol. méd., Bordeaux, France
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Affiliation(s)
- C Mathieu
- Lab. spécialisé d'analyses de biol. méd., Bordeaux, France
| | - H Mathieu
- Lab. spécialisé d'analyses de biol. méd., Bordeaux, France
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Bellabchara A, Lefebvre P, Christol P, Mathieu H. Improved modeling of excitons in type-II semiconductor heterostructures by use of a three-dimensional variational function. Phys Rev B Condens Matter 1994; 50:11840-11844. [PMID: 9975322 DOI: 10.1103/physrevb.50.11840] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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31
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Lefebvre P, Christol P, Mathieu H. Unified formulation of excitonic absorption spectra of semiconductor quantum wells, superlattices, and quantum wires. Phys Rev B Condens Matter 1993; 48:17308-17315. [PMID: 10008340 DOI: 10.1103/physrevb.48.17308] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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32
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Christol P, Lefebvre P, Mathieu H. Low dimensionality semiconductors: modelling of excitons
via a fractional-dimensional space. ACTA ACUST UNITED AC 1993. [DOI: 10.1051/jp3:1993237] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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33
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Balmain N, Hauchecorne M, Pike JW, Cuisinier-Gleizes P, Mathieu H. Distribution and subcellular immunolocalization of 1,25-dihydroxyvitamin D3 receptors in rat epiphyseal cartilage. Cell Mol Biol (Noisy-le-grand) 1993; 39:339-50. [PMID: 8392883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The distribution and subcellular localization of the 1,25-dihydroxyvitamin D3 receptor (VDR) in the epiphyseal cartilage of normal weaning rats were examined immunocytochemically at the light and electron microscope level using a monoclonal anti-VDR antibody (9A7 gamma). VDR immunoreactivity was detected in the nuclei of chondrocytes in all zones of the epiphyseal plate cartilage from the resting to calcifying chondrocytes, and at much lower concentrations, in the cytoplasms. Perichondrial mesenchymal cells contained no VDR immunoreactivity. VDR immunoreactivity developed in the nuclei of cells in the lateral margin area as they acquired the chondroblast phenotype. VDR immunoreactivity was also found over the nucleoli of chondrocytes in all cells zones of the epiphyseal plate and appeared in the nucleoli of the cells in the lateral margin area before immunostaining of the nuclei, as the mesenchymal cells differentiated into chondroblasts. Electron microscopy showed that the immunoreactivity for 1,25(OH)2D3 receptor, indicated by gold particles, was associated with scattered clumps of compact chromatin and small clumps of dispersed chromatin. But the nuclei immunostaining patterns before and after mitosis were different in proliferative chondrocytes. The heterochromatin along the nuclear envelope was immunonegative in interphase chondrocytes, but there was VDR immunostaining over the rim of the perinuclear chromatin just after mitosis. In the nucleoli, the dense fibrillar component was immunostained, but the fibrillar centers and the perinuclear chromatin were not. This distribution of VDR immunoreactivity suggests that the hormone is directly involved in differentiation, proliferation and maturation of cartilage cells, and also with extracellular calcification in epiphyseal cartilage. The presence of immunoreactive VDR receptors in nucleoli of chondrocytes, particularly the fibrillar component, suggests that 1,25(OH)2D3 may be involved in regulation of ribosomal genes.
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Affiliation(s)
- N Balmain
- INSERM U-120, Hôpital R. Debré, Paris, France
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34
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Calatayud J, Allègre J, Mathieu H, Magnéa N, Mariette H. Piezoreflectance in CdTe/(Cd,Zn)Te strained-layer superlattices: Periodicity effect, valence-band offset, and exciton binding energies. Phys Rev B Condens Matter 1993; 47:9684-9692. [PMID: 10005039 DOI: 10.1103/physrevb.47.9684] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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35
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Gil B, Lefebvre P, Bonnel P, Mathieu H, Deparis C, Massies J, Neu G, Chen Y. Uniaxial-stress investigation of asymmetrical GaAs-(Ga,Al)As double quantum wells. Phys Rev B Condens Matter 1993; 47:1954-1960. [PMID: 10006231 DOI: 10.1103/physrevb.47.1954] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Berdal A, Hotton D, Pike JW, Mathieu H, Dupret JM. Cell- and stage-specific expression of vitamin D receptor and calbindin genes in rat incisor: regulation by 1,25-dihydroxyvitamin D3. Dev Biol 1993; 155:172-9. [PMID: 8380146 DOI: 10.1006/dbio.1993.1016] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
To investigate the extent of 1,25-dihydroxyvitamin D3 [1,25(OH)2D3] action and its relationships to calbindin gene expression in mineralized tissues, we have analyzed rat incisors with different probes, including a vitamin D receptor (VDR) antibody and specific cDNAs to rat calbindin-D9K and calbindin-D28K. Developmental and hormonal controls of calbindin gene expression were investigated by Northern blot analysis of ameloblast and odontoblast mRNA. Distribution and hormone-induced changes of VDR were also studied by light microscopic immunocytochemistry. A differential tissue- and stage-specific expression of the calbindin genes was observed in microdissected portions of the continuously erupting incisor. The two calbindins were expressed in ameloblasts, whereas only calbindin-D28K was expressed in odontoblasts. Moreover, in ameloblasts, expression of calbindin-D28K preceded that of calbindin-D9K. Immunoreactivity for VDR was present in all progenitor cells and progressively decreased during the differentiation process, whereas, in differentiated tissues, a hormonal upregulation was restricted to hard tissue-forming cells, i.e., ameloblasts and odontoblasts. Furthermore, calbindin gene expression appeared to be regulated by 1,25(OH)2D3. Taken together, these data indicate that ameloblasts and odontoblasts are target cells for 1,25(OH)2D3 and provide the first insights into the hormonal control of tooth genes during development.
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Affiliation(s)
- A Berdal
- INSERM U 120, Hôpital Robert Debré, Paris, France
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Arnaud G, Allègre J, Lefebvre P, Mathieu H, Howard LK, Dunstan DJ. Photoreflectance and piezophotoreflectance studies of strained-layer InxGa1-xAs-GaAs quantum wells. Phys Rev B Condens Matter 1992; 46:15290-15301. [PMID: 10003646 DOI: 10.1103/physrevb.46.15290] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Lefebvre P, Christol P, Mathieu H. Excitons in semiconductor superlattices: Heuristic description of the transfer between Wannier-like and Frenkel-like regimes. Phys Rev B Condens Matter 1992; 46:13603-13606. [PMID: 10003411 DOI: 10.1103/physrevb.46.13603] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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39
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Mathieu H, Lefebvre P, Christol P. Simple analytical method for calculating exciton binding energies in semiconductor quantum wells. Phys Rev B Condens Matter 1992; 46:4092-4101. [PMID: 10004139 DOI: 10.1103/physrevb.46.4092] [Citation(s) in RCA: 136] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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40
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Lambert-Zechovsky N, Bingen E, Denamur E, Brahimi N, Brun P, Mathieu H, Elion J. Molecular Analysis Provides Evidence for the Endogenous Origin of Bacteremia and Meningitis Due to Enterobacter cloacae in an Infant. Clin Infect Dis 1992; 15:30-2. [PMID: 1352150 DOI: 10.1093/clinids/15.1.30] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
We analyzed the restriction fragment length polymorphism (RFLP) of total DNA and of ribosomal DNA regions (ribotyping) to document the occurrence of endogenous, systemic bacteremia and meningitis due to Enterobacter cloacae in a newborn. Five strains of E. cloacae were isolated from this newborn. Three of these strains were recovered from stool at counts of 10(8), 10(9), and 10(9) organisms/g of feces, respectively; one strain was isolated from blood; and one strain was isolated from cerebrospinal fluid. In addition, five epidemiologically unrelated strains of E. cloacae were studied for comparison. Our study clearly shows the genetic relatedness of the strains isolated sequentially from cultures of stool, blood, and cerebrospinal fluid. RFLP analysis of total DNA and ribotyping seem particularly well suited to the study of the epidemiology of nosocomial E. cloacae strains.
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Lefebvre P, Bonnel P, Gil B, Mathieu H. Resonant tunneling via stress-induced valence-band mixings in GaAs-(Ga,Al)As asymmetrical double quantum wells. Phys Rev B Condens Matter 1991; 44:5635-5647. [PMID: 9998404 DOI: 10.1103/physrevb.44.5635] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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42
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Berdal A, Nanci A, Smith CE, Ahluwalia JP, Thomasset M, Cuisinier-Gleizes P, Mathieu H. Differential expression of calbindin-D 28 kDa in rat incisor ameloblasts throughout enamel development. Anat Rec (Hoboken) 1991; 230:149-63. [PMID: 1867392 DOI: 10.1002/ar.1092300202] [Citation(s) in RCA: 32] [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] [Indexed: 12/29/2022]
Abstract
Calbindin-D 28 kDa (CaBP 28 kDa), a vitamin D-dependent calcium-binding protein, has been associated with calcium handling by cells. We have investigated the expression of this protein in the rat incisor enamel organ, an epithelium interposed between a mineralizing matrix and connective tissue rich in blood vessels, by radioimmunoassay (RIA), Western blotting, and quantitative protein A-gold immunocytochemistry with antibodies to rat kidney CaBP 28 kDa. RIA of cytosolic extracts showed that enamel organs contained relatively high concentrations of CaBP 28 kDa (compared to kidney; see review by Christakos S., C. Gabrielides, and W.B. Rhoten 1989 Endocr. Rev., 10:3-25). Immunoblotting of proteins extracted from enamel organ strips revealed an intensely-stained band near 28 kDa throughout amelogenesis following ameloblast differentiation. Immunocytochemically, CaBP 28 kDa was localized exclusively within ameloblasts. The density of labelling increased from the presecretory stage to the secretory stage and fluctuated across the maturation stage in relation to ameloblast modulation. Ruffle-ended ameloblasts consistently showed the most intense immunoreaction. Gold particles were present throughout the cytoplasm and nuclei of ameloblasts but regions rich in rough endoplasmic reticulum or cell webs showed a higher immunolabelling. Some gold particles were also associated with the external face of the rough endoplasmic reticulum. Multivesicular bodies in maturation stage ameloblasts were occasionally immunoreactive. These data suggest that the intracellular concentration of CaBP 28 kDa is regulated throughout amelogenesis reflecting a stage-specific control of calcium homeostasis in ameloblasts.
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Affiliation(s)
- A Berdal
- Unité 120 INSERM, Hôpital Robert Debré, Paris, France
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Abstract
This electron microscope study describes the subcellular occurrence and distribution of immunoreactive calbindin-D9K in the trabecular metaphyseal and compact cortical bone of normal rats, rachitic vitamin-D-deficient rats, and rachitic rats given 1,25-(OH)2D3. Undecalcified bones were embedded in Lowicryl K4M and calbindin-D9K antigenicity was detected by the protein A-gold method. Immunoreactive calbindin-D9K was localized in the cytoplasm and cell processes of osteoblasts and osteocytes. Immunoreactive calbindin-D9K was also found within matrix vesicles and calcifying matrix vesicles, where it lay over the needle-shaped crystallites, at the apparent site of initial crystal formation, but not along the whole crystallites. In fully mineralized bone it occurred at the same site, over the crystallites. Calibindin-D9K was vitamin-D-dependent in the osteoblasts and matrix vesicles, where its presence was correlated with the reappearance of crystallites in 1,25-(OH)2D3-treated vitamin-D-deficient rats. This suggests that immunoreactive calbindin-D9K is involved in mineral deposition in bone matrix vesicles. Abnormal intracellular calcification associated with calbindin-D9K antigenicity in the osteoblasts of 1,25-(OH)2D3-treated vitamin-D-deficient rats indicates that immunoreactive calbindin-D9K may also play a part in abnormal intracellular mineral deposition.
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Affiliation(s)
- N Balmain
- INSERM-U.120, alliée CNRS-SDI I19261, Hôpital Robert Debré, Paris, France
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Mathieu H, Allègre J, Gil B. Piezomodulation spectroscopy: A powerful investigation tool of heterostructures. Phys Rev B Condens Matter 1991; 43:2218-2227. [PMID: 9997494 DOI: 10.1103/physrevb.43.2218] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Berdal A, Hotton D, Kamyab S, Cuisinier-Gleizes P, Mathieu H. Subcellular co-localization and co-variations of two vitamin D-dependent proteins in rat ameloblasts. Arch Oral Biol 1991; 36:715-25. [PMID: 1747073 DOI: 10.1016/0003-9969(91)90038-v] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The immunocytochemical patterns of calbindin-D9k (CaBP 9k) and calbindin-D28k (CaBP 28k) were compared by light and electron microscopy throughout amelogenesis. Labelling on serial sections and co-localization of CaBPs confirmed that the two proteins were restricted to a single cell type, the ameloblasts. Their quantity increased during presecretion, was stable during secretion and alternately high and low during the cyclic modulation of ameloblasts which occurs during maturation. Ruffle-ended ameloblasts contained the highest apparent concentration. Investigations with several fixatives indicated that the CaBPs were present in the cytosol and the nucleus, although there were slight differences with various fixatives by light microscopy. Their concentrations in these compartments varied in parallel throughout amelogenesis. However, mitochondria contained only immunoreactive CaBP 9k. While the distribution of CaBP 9k in zones containing Golgi apparatus and rough endoplasmic reticulum was similar, CaBP 28k concentration has, in another paper, been shown to be higher near the rough endoplasmic reticulum.
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Affiliation(s)
- A Berdal
- U120 INSERM, Hôpital Robert Debré, Paris, France
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46
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Bonnel P, Lefebvre P, Gil B, Mathieu H, Deparis C, Massies J, Neu G, Chen Y. Reflectance study of interwell couplings in GaAs-Ga1-xAlxAs double quantum wells. Phys Rev B Condens Matter 1990; 42:3435-3443. [PMID: 9995857 DOI: 10.1103/physrevb.42.3435] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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47
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Allegre J, Calatayud J, Gil B, Mathieu H, Tuffigo H, Lentz G, Magnea N, Mariette H. Identification of valence subbands in CdTe-Cd1-xZnxTe strained-layer quantum wells by differential spectroscopy. Phys Rev B Condens Matter 1990; 41:8195-8202. [PMID: 9993142 DOI: 10.1103/physrevb.41.8195] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Bingen E, Lambert-Zechovsky N, Mariani-Kurkdjian P, Doit C, Aujard Y, Fournerie F, Mathieu H. Bacterial counts in cerebrospinal fluid of children with meningitis. Eur J Clin Microbiol Infect Dis 1990; 9:278-81. [PMID: 2112465 DOI: 10.1007/bf01968060] [Citation(s) in RCA: 83] [Impact Index Per Article: 2.4] [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: 12/30/2022]
Abstract
Eighty-five cerebrospinal fluid (CSF) specimens from the same number of pediatric patients with meningitis were examined to determine the bacterial count and the relationship of this count to the microscopy results, the ages of the patients and the bacterial species isolated. Bacterial counts ranged from 2 x 10 to 4 x 10(9) CFU/ml CSF. Twenty-five percent of the 85 CSF specimens positive for Haemophilus influenzae type b, Neisseria meningitidis, Streptococcus pneumoniae, Escherichia coli K1 and group B streptococci had counts of 10(7) CFU/ml or higher. Children between 1 and 6 months of age had significantly higher counts (p less than 0.05) than the other age groups. The three patients who had positive CSF cultures 24 h after the start of therapy all had initial bacterial counts of 10(7) CFU/ml or higher. The detection limit for Gram stain/microscopy was 10(5) CFU/ml. No correlation was found between bacterial count and the number of polymorphonuclear leukocytes.
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Affiliation(s)
- E Bingen
- Department of Microbiology, Hôpital Robert Debré, Paris, France
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Mathieu H, Chatt A, Allegre J, Faurie JP. Subband structure of strained-layer CdTe/ZnTe superlattices: A reexamination. Phys Rev B Condens Matter 1990; 41:6082-6085. [PMID: 9994498 DOI: 10.1103/physrevb.41.6082] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Gil B, Mathieu H, Massies J, Neu G, Fukunaga T, Nakashima H. Line-shape analysis of the reflectivity spectra of GaAs/(Ga,Al)As single quantum wells grown on (001)- and (311)-oriented substrates. Phys Rev B Condens Matter 1990; 41:2885-2889. [PMID: 9994055 DOI: 10.1103/physrevb.41.2885] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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