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Gauthier A, Tlili L, Battu S, Le Moan C, Ploy MC, Lalloue F, Bégaud G, Barraud O. Sedimentation field-flow fractionation for rapid phenotypic antimicrobial susceptibility testing: a pilot study. J Antimicrob Chemother 2024:dkae132. [PMID: 38708644 DOI: 10.1093/jac/dkae132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Accepted: 04/16/2024] [Indexed: 05/07/2024] Open
Abstract
BACKGROUND The increase in antibiotic resistance is a major public health issue. The development of rapid antimicrobial susceptibility testing (AST) methods is becoming a priority to ensure early and appropriate antibiotic therapy. OBJECTIVES To evaluate sedimentation field-flow fractionation (SdFFF) as a method for performing AST in less than 3 h. METHODS SdFFF is based on the detection of early biophysical changes in bacteria, using a chromatographic-type technology. One hundred clinical Escherichia coli strains were studied. A calibrated bacterial suspension was incubated for 2 h at 37°C in the absence (untreated) or presence (treated) of five antibiotics used at EUCAST breakpoint concentrations. Bacterial suspensions were then injected into the SdFFF machine. For each E. coli isolate, retention times and elution profiles of antibiotic-treated bacteria were compared with retention times and elution profiles of untreated bacteria. Algorithms comparing retention times and elution profiles were used to determine if the strain was susceptible or resistant. Performance evaluation was done according to CLSI and the ISO standard 20776-2:2021 with broth microdilution used as the reference method. RESULTS AST results from SdFFF were obtained in less than 3 h. SdFFF showed high categorical agreement (99.8%), sensitivity (99.5%) and specificity (100.0%) with broth microdilution. Results for each antimicrobial were also in agreement with the ISO 20776-2 recommendations, with sensitivity and specificity of ≥95.0%. CONCLUSIONS This study showed that SdFFF can be used as a rapid, accurate and reliable phenotypic AST method with a turnaround time of less than 3 h.
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Affiliation(s)
- Audrey Gauthier
- Inserm, CHU Limoges, RESINFIT, UMR 1092, University of Limoges, 87000 Limoges, France
- Inserm, CHU Limoges, CAPTuR, UMR 1308, University of Limoges, 87000 Limoges, France
- DAMOCLES Diagnostics, 87000 Limoges, France
| | - Linda Tlili
- Inserm, CHU Limoges, RESINFIT, UMR 1092, University of Limoges, 87000 Limoges, France
| | - Serge Battu
- Inserm, CHU Limoges, CAPTuR, UMR 1308, University of Limoges, 87000 Limoges, France
- DAMOCLES Diagnostics, 87000 Limoges, France
| | - Coline Le Moan
- Inserm, CHU Limoges, CAPTuR, UMR 1308, University of Limoges, 87000 Limoges, France
| | - Marie-Cécile Ploy
- Inserm, CHU Limoges, RESINFIT, UMR 1092, University of Limoges, 87000 Limoges, France
| | - Fabrice Lalloue
- Inserm, CHU Limoges, CAPTuR, UMR 1308, University of Limoges, 87000 Limoges, France
| | - Gaëlle Bégaud
- Inserm, CHU Limoges, CAPTuR, UMR 1308, University of Limoges, 87000 Limoges, France
- DAMOCLES Diagnostics, 87000 Limoges, France
| | - Olivier Barraud
- Inserm, CHU Limoges, RESINFIT, UMR 1092, University of Limoges, 87000 Limoges, France
- DAMOCLES Diagnostics, 87000 Limoges, France
- CHU Limoges, Inserm, CIC1435, 87000 Limoges, France
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2
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Garant E, Gauthier A, Deli C, Proulx J. Developmental factors associated with inappropriate coping strategies among sexual aggressors of children. Child Abuse Negl 2023; 146:106499. [PMID: 37866250 DOI: 10.1016/j.chiabu.2023.106499] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 09/20/2023] [Accepted: 10/04/2023] [Indexed: 10/24/2023]
Abstract
BACKGROUND Many studies in the field of sexual offending focus on the presence of inadequate coping strategies prior to sexual offending, and the role these strategies play in the sequence of the offense. However, little is known about the development of strategies-such as substance abuse and, especially, deviant sexual fantasies-to manage daily difficulties. OBJECTIVE To better understand the antecedents of the development of inadequate coping strategies, we conducted a series of structural equation modeling (SEM) analyses. PARTICIPANTS AND SETTINGS Based on 274 sexual aggressors of children, these analyses were based on components of Maniglio (2011a) theoretical model, in which victimization before the age of 18 leads to the development of psychological problems and, ultimately, the reliance on deviant sexual fantasies as a coping strategy. METHODS Two models were created through exploratory factorial analysis: the first model comprised 19 manifest variables, while the second model consisted of 15 manifest variables. All the retained variables were related to Maniglio's (2011a) hypothesis. RESULTS The analyses not only confirm Maniglio's hypothesis but also produced two statistically significant models (RMSEA = 0.069, CFI = 0.93 and TLI = 0.92 for Model 1 & RMSEA = 0.074, CFI = 0.93 and TLI = 0.91 for Model 2) composed of three indirect trajectories and one direct trajectory on the one hand, and four indirect trajectories and one direct trajectory on the other hand. CONCLUSIONS These results are consistent with those of studies that have highlighted the heterogeneity of sexual aggressors of children.
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Affiliation(s)
- E Garant
- School of criminology, Université de Montréal, Montréal, Québec, Canada.
| | - A Gauthier
- School of criminology, Université de Montréal, Montréal, Québec, Canada
| | - C Deli
- School of criminology, Université de Montréal, Montréal, Québec, Canada
| | - J Proulx
- School of criminology, Université de Montréal, Montréal, Québec, Canada
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Gauthier A, Tlili L, Battu S, Delebassée S, Duval RE, Cardot PJP, Ploy MC, Lalloué F, Le-Moan C, Barraud O, Begaud G. Sedimentation Field-Flow Fractionation: A Diagnostic Tool for Rapid Antimicrobial Susceptibility Testing. Anal Chem 2023; 95:16950-16957. [PMID: 37939234 DOI: 10.1021/acs.analchem.3c03134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Abstract
Conventional antimicrobial susceptibility testing (AST) methods require 24-48 h to provide results, creating the need for a probabilistic antibiotic therapy that increases the risk of antibiotic resistance emergence. Consequently, the development of rapid AST methods has become a priority. Over the past decades, sedimentation field-flow fractionation (SdFFF) has demonstrated high sensitivity in early monitoring of induced biological events in eukaryotic cell populations. This proof-of-concept study aimed at investigating SdFFF for the rapid assessment of bacterial susceptibility to antibiotics. Three bacterial species were included (Escherichia coli, Klebsiella pneumoniae, and Pseudomonas aeruginosa) with two panels of antibiotics tailored to each bacterial species. The results demonstrate that SdFFF, when used in "Hyperlayer" elution mode, enables monitoring of antibiotic-induced morphological changes. The percentage variation of the retention factor (PΔR) was used to quantify the biological effect of antibiotics on bacteria with the establishment of a threshold value of 16.8% to differentiate susceptible and resistant strains. The results obtained with SdFFF were compared to that of the AST reference method, and a categorical agreement of 100% was observed. Overall, this study demonstrates the potential of SdFFF as a rapid method for the determination of antibiotic susceptibility or resistance since it is able to provide results within a shorter time frame than that needed for conventional methods (3-4 h vs 16-24 h, respectively), enabling earlier targeted antibiotic therapy. Further research and validation are necessary to establish the effectiveness and reliability of SdFFF in clinical settings.
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Affiliation(s)
- Audrey Gauthier
- University of Limoges, Inserm, CHU Limoges, RESINFIT, UMR 1092, 87000 Limoges, France
- University of Limoges, Inserm, CHU Limoges, CAPTuR, UMR 1308, 87000 Limoges, France
| | - Linda Tlili
- University of Limoges, Inserm, CHU Limoges, RESINFIT, UMR 1092, 87000 Limoges, France
| | - Serge Battu
- University of Limoges, Inserm, CHU Limoges, CAPTuR, UMR 1308, 87000 Limoges, France
| | - Sylvie Delebassée
- University of Limoges, Faculty of Pharmacy, LABCiS, UR22722, 87000 Limoges, France
| | - Raphaël E Duval
- University of Lorraine, CNRS, L2CM, UMR 7053, 54000 Nancy, France
| | - Philippe J P Cardot
- University of Limoges, Inserm, CHU Limoges, CAPTuR, UMR 1308, 87000 Limoges, France
| | - Marie-Cécile Ploy
- University of Limoges, Inserm, CHU Limoges, RESINFIT, UMR 1092, 87000 Limoges, France
| | - Fabrice Lalloué
- University of Limoges, Inserm, CHU Limoges, CAPTuR, UMR 1308, 87000 Limoges, France
| | - Coline Le-Moan
- University of Limoges, Inserm, CHU Limoges, CAPTuR, UMR 1308, 87000 Limoges, France
| | - Olivier Barraud
- University of Limoges, Inserm, CHU Limoges, RESINFIT, UMR 1092, 87000 Limoges, France
- CHU Limoges, Inserm, CIC1435 Limoges, France
| | - Gaëlle Begaud
- University of Limoges, Inserm, CHU Limoges, CAPTuR, UMR 1308, 87000 Limoges, France
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4
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Abalos C, Gauthier A, Davis A, Ellis C, Balbontin N, Kapur A, Bonti-Ankomah S. Surveillance of laboratory exposures to human pathogens and toxins, Canada, 2022. Can Commun Dis Rep 2023; 49:398-405. [PMID: 38463906 PMCID: PMC10919944 DOI: 10.14745/ccdr.v49i09a06] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
Background The Laboratory Incident Notification Canada (LINC) surveillance system was launched in 2015 to monitor the mandated national reporting of laboratory incidents. This report describes the laboratory exposures reported in 2022. Methods Exposure incidents were analyzed by activity, occurrence, sector, root cause and pathogens/toxins implicated, while affected individuals were analyzed by education, exposure route, role and years of laboratory experience. An analysis of the median number of exposures per month was conducted, and time between the exposure incident date and the date the incident was reported to LINC was examined. Results Forty confirmed laboratory exposure incident reports were received, with two suspected laboratory-acquired infections. The exposure incident rate per 100 active licences was 3.8, and the number of exposure incidents was highest in September. The majority of exposure incidents involved risk group 2 pathogens (n=27; 63%) and non-security sensitive biological agents (n=36; 84%). Microbiology was the most cited activity occurring during the exposure event (n=20; 50%), and sharps and procedure-related issues were the most common occurrences (n=15; 24.2% each). Most incidents were reported by the academic sector (n=16; 40%). Human interaction was the most common root cause (n=20; 23.8%) and most affected individuals were technicians/technologists (n=68; 73.1%). The median time delay between the incident date and reporting date was 5.5 days. Conclusion The exposure incident rate was lower in 2022 than in 2021. Incidents related to sharps and standard operating procedures remained the most common occurrence types. The most cited root cause of exposure incidents involved human interaction.
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Affiliation(s)
- Christine Abalos
- Health Security Regional Operations Branch, Public Health Agency of Canada, Ottawa, ON
| | - Audrey Gauthier
- Health Security Regional Operations Branch, Public Health Agency of Canada, Ottawa, ON
| | - Antoinette Davis
- Health Security Regional Operations Branch, Public Health Agency of Canada, Ottawa, ON
| | - Cailey Ellis
- Health Security Regional Operations Branch, Public Health Agency of Canada, Ottawa, ON
| | - Nathalie Balbontin
- Health Security Regional Operations Branch, Public Health Agency of Canada, Ottawa, ON
| | - Aryan Kapur
- Health Security Regional Operations Branch, Public Health Agency of Canada, Ottawa, ON
| | - Samuel Bonti-Ankomah
- Health Security Regional Operations Branch, Public Health Agency of Canada, Ottawa, ON
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5
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Gauthier A, Mankouri F, Demoly P, Chiriac AM. Non-Immediate Maculopapular Erythema To Gadolinium-Based Contrast Agent. J Investig Allergol Clin Immunol 2021; 32:226-228. [PMID: 34489230 DOI: 10.18176/jiaci.0733] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- A Gauthier
- Department of Pulmonology, Division of Allergy, Hôpital Arnaud de Villeneuve, University Hospital of Montpellier, Univ Montpellier, France.,Department of Allergy and Immunology, Laval University Hospital Center, Laval University, Quebec City, Canada
| | - F Mankouri
- Department of Pulmonology, Division of Allergy, Hôpital Arnaud de Villeneuve, University Hospital of Montpellier, Univ Montpellier, France
| | - P Demoly
- Department of Pulmonology, Division of Allergy, Hôpital Arnaud de Villeneuve, University Hospital of Montpellier, Univ Montpellier, France.,Institut Desbrest d'Epidémiologie et de Santé Publique UMR INSERM - Université de Montpellier
| | - A M Chiriac
- Department of Pulmonology, Division of Allergy, Hôpital Arnaud de Villeneuve, University Hospital of Montpellier, Univ Montpellier, France.,Institut Desbrest d'Epidémiologie et de Santé Publique UMR INSERM - Université de Montpellier
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6
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Gauthier A, Viel S, Perret M, Brocard G, Casey R, Lombard C, Laurent-Chabalier S, Debouverie M, Edan G, Vukusic S, Lebrun-Frénay C, De Sèze J, Laplaud DA, Castelnovo G, Gout O, Ruet A, Moreau T, Casez O, Clavelou P, Berger E, Zephir H, Trouillet-Assant S, Thouvenot E. Comparison of Simoa TM and Ella TM to assess serum neurofilament-light chain in multiple sclerosis. Ann Clin Transl Neurol 2021; 8:1141-1150. [PMID: 33830650 PMCID: PMC8108418 DOI: 10.1002/acn3.51355] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [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: 11/12/2020] [Revised: 02/08/2021] [Accepted: 03/17/2021] [Indexed: 11/11/2022] Open
Abstract
We compared SimoaTM and EllaTM immunoassays to assess serum neurofilament‐light chain levels in 203 multiple sclerosis patients from the OFSEP HD study. There was a strong correlation (ρ = 0.86, p < 0.0001) between both platforms. The EllaTM instrument overestimated values by 17%, but as the data were linear (p = 0.57), it was possible to apply a correction factor to EllaTM results. As for SimoaTM, serum neurofilament‐light chain levels measured by EllaTM were correlated with age and EDSS and were significantly higher in active multiple sclerosis, suggesting that these assays are equivalent and can be used in routine clinical practice.
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Affiliation(s)
- Audrey Gauthier
- Paris Sciences et Lettres - École Pratique des Hautes Études, Paris, France
| | - Sébastien Viel
- Immunology laboratory, Hospices Civils de Lyon, Lyon Sud Hospital, Pierre-Bénite, France.,International Center of Research in Infectiology, Lyon University, INSERM U1111, CNRS UMR 5308, ENS, UCBL, Lyon, France
| | - Magali Perret
- Immunology laboratory, Hospices Civils de Lyon, Lyon Sud Hospital, Pierre-Bénite, France
| | - Guillaume Brocard
- Université de Lyon, Université Claude Bernard Lyon 1, Lyon, F-69000, France.,Hospices Civils de Lyon, Service de Neurologie, sclérose en plaques, pathologies de la myéline et neuro-inflammation, Bron, F-69677, France.,Observatoire Français de la Sclérose en Plaques, Centre de Recherche en Neurosciences de Lyon, INSERM 1028 et CNRS UMR 5292, Lyon, F-69003, France.,EUGENE DEVIC EDMUS Foundation against multiple sclerosis, state-approved foundation, Bron, F-69677, France
| | - Romain Casey
- Université de Lyon, Université Claude Bernard Lyon 1, Lyon, F-69000, France.,Hospices Civils de Lyon, Service de Neurologie, sclérose en plaques, pathologies de la myéline et neuro-inflammation, Bron, F-69677, France.,Observatoire Français de la Sclérose en Plaques, Centre de Recherche en Neurosciences de Lyon, INSERM 1028 et CNRS UMR 5292, Lyon, F-69003, France.,EUGENE DEVIC EDMUS Foundation against multiple sclerosis, state-approved foundation, Bron, F-69677, France
| | - Christine Lombard
- Immunology laboratory, Hospices Civils de Lyon, Lyon Sud Hospital, Pierre-Bénite, France
| | - Sabine Laurent-Chabalier
- Department of Biostatistics, Clinical Epidemiology, Public Health, and Innovation in Methodology, CHU Nîmes, Univ. Montpellier, Nîmes, France
| | - Marc Debouverie
- Department of Neurology, Nancy University Hospital, Nancy, France.,Université de Lorraine, APEMAC, Nancy, F-54000, France
| | - Gilles Edan
- CHU Pontchaillou, Rennes, CIC1414 INSERM, F-35000, France
| | - Sandra Vukusic
- Université de Lyon, Université Claude Bernard Lyon 1, Lyon, F-69000, France.,Hospices Civils de Lyon, Service de Neurologie, sclérose en plaques, pathologies de la myéline et neuro-inflammation, Bron, F-69677, France.,Observatoire Français de la Sclérose en Plaques, Centre de Recherche en Neurosciences de Lyon, INSERM 1028 et CNRS UMR 5292, Lyon, F-69003, France.,EUGENE DEVIC EDMUS Foundation against multiple sclerosis, state-approved foundation, Bron, F-69677, France
| | - Christine Lebrun-Frénay
- Department of Neurology, UR2CA, URRIS, CRCSEP, Centre Hospitalier Universitaire Pasteur2, Université Nice Côte d'Azur, Nice, France
| | - Jérôme De Sèze
- Department of Neurology and Clinical Investigation Center, CIC 1434, INSERM 1434, CHU de Strasbourg, Strasbourg, F-67000, France
| | - David Axel Laplaud
- Department of Neurology and CIC015 INSERM, CHU de Nantes, Nantes, F-44093, France.,CRTI-Inserm U1064, Nantes, F-44000, France
| | | | - Olivier Gout
- Department of Neurology, Fondation Rothschild, Paris, F-75000, France
| | - Aurélie Ruet
- Univ. Bordeaux, Bordeaux, F-33000, France.,INSERM U1215, Neurocentre Magendie, Bordeaux, F-33000, France.,Department of Neurology, CHU de Bordeaux, CIC Bordeaux CIC1401, Bordeaux, F-33000, France
| | - Thibault Moreau
- Department of Neurology, CHU de Dijon, EA4184, Dijon, F-21000, France
| | - Olivier Casez
- Department of Neurology, CHU Grenoble Alpes, La Tronche/Grenoble, F-38700, France
| | - Pierre Clavelou
- Department of Neurology, CHU Clermont-Ferrand, Clermont-Ferrand, F-63000, France.,Université Clermont Auvergne, Inserm, Neuro-Dol, Clermont-Ferrand, F-63000, France
| | - Eric Berger
- Department of Neurology, CHU Besançon, Besançon, F-25030, France
| | - Hélène Zephir
- CHU Lille, CRCSEP Lille, Univ Lille, Lille, U1172, F-59000, France
| | - Sophie Trouillet-Assant
- International Center of Research in Infectiology, Lyon University, INSERM U1111, CNRS UMR 5308, ENS, UCBL, Lyon, France.,Lyon Sud Hospital, Pierre-Bénite, France
| | - Eric Thouvenot
- Department of Neurology, CHU Nîmes, Univ Montpellier, Nîmes, France.,Institut de Génomique Fonctionnelle, Univ. Montpellier, CNRS, INSERM, Montpellier Cedex 5, F-34094, France
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Lu H, Gauthier A, Hepting M, Tremsin AS, Reid AH, Kirchmann PS, Shen ZX, Devereaux TP, Shao YC, Feng X, Coslovich G, Hussain Z, Dakovski GL, Chuang YD, Lee WS. Time-resolved RIXS experiment with pulse-by-pulse parallel readout data collection using X-ray free electron laser. Sci Rep 2020; 10:22226. [PMID: 33335197 PMCID: PMC7746750 DOI: 10.1038/s41598-020-79210-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 11/30/2020] [Indexed: 11/21/2022] Open
Abstract
Time-resolved resonant inelastic X-ray scattering (RIXS) is one of the developing techniques enabled by the advent of X-ray free electron laser (FEL). It is important to evaluate how the FEL jitter, which is inherent in the self-amplified spontaneous emission process, influences the RIXS measurement. Here, we use a microchannel plate (MCP) based Timepix soft X-ray detector to conduct a time-resolved RIXS measurement at the Ti L3-edge on a charge-density-wave material TiSe2. The fast parallel Timepix readout and single photon sensitivity enable pulse-by-pulse data acquisition and analysis. Due to the FEL jitter, low detection efficiency of spectrometer, and low quantum yield of RIXS process, we find that less than 2% of the X-ray FEL pulses produce signals, preventing acquiring sufficient data statistics while maintaining temporal and energy resolution in this measurement. These limitations can be mitigated by using future X-ray FELs with high repetition rates, approaching MHz such as the European XFEL in Germany and LCLS-II in the USA, as well as by utilizing advanced detectors, such as the prototype used in this study.
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Affiliation(s)
- H Lu
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Stanford University, 2575 Sand Hill Road, Menlo Park, CA, 94025, USA
| | - A Gauthier
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Stanford University, 2575 Sand Hill Road, Menlo Park, CA, 94025, USA
| | - M Hepting
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Stanford University, 2575 Sand Hill Road, Menlo Park, CA, 94025, USA
| | - A S Tremsin
- Space Sciences Laboratory, University of California at Berkeley, Berkeley, CA, 94720, USA
| | - A H Reid
- Linac Coherent Light Source (LCLS), SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
| | - P S Kirchmann
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Stanford University, 2575 Sand Hill Road, Menlo Park, CA, 94025, USA.,Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA, 94305, USA
| | - Z X Shen
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Stanford University, 2575 Sand Hill Road, Menlo Park, CA, 94025, USA.,Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA, 94305, USA
| | - T P Devereaux
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Stanford University, 2575 Sand Hill Road, Menlo Park, CA, 94025, USA.,Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA, 94305, USA.,Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Y C Shao
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - X Feng
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - G Coslovich
- Linac Coherent Light Source (LCLS), SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
| | - Z Hussain
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - G L Dakovski
- Linac Coherent Light Source (LCLS), SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
| | - Y D Chuang
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - W S Lee
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Stanford University, 2575 Sand Hill Road, Menlo Park, CA, 94025, USA.
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8
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Abstract
Gait is one of the most basic movements, and walking activity accomplished in dual task conditions realistically represents daily life mobility. Much is known about diurnal variations of gait components such as muscle power, postural control, and attention. However, paradoxically only little is known about gait itself. The aim of this study was to analyze whether gait parameters show time-of-day fluctuation in simple and dual task conditions. Sixteen young subjects performed sessions at five specific hours (06:00, 10:00, 14:00, 18:00 and 22:00 h), performing a single (walking or counting) and a dual (walking and counting) task. When performing gait in dual task conditions, an additional cognitive task had to be carried out. More precisely, the participants had to count backwards from a two-digit random number by increments of three while walking. Spatio-temporal gait parameters and counting performance data were recorded for analysis. Walking speed significantly decreased, while stride length variability increased when the task condition switched from single to dual. In the single-task condition, diurnal variations were observed in both walking speed and counting speed. Walking speed was higher in the afternoon and in the evening (14:00 and 22:00 h) and lower in the morning (10:00 h). Counting speed was maximum at 10:00 and 14:00 h and minimum at 18:00 h. Nevertheless, no significant diurnal fluctuation was substanytiated in the dual task condition. These results confirm the existing literature about changes in gait between single and dual task conditions. A diurnal pattern of single-task gait could also be highlighted. Moreover, this study suggests that diurnal variations faded in complex dual task gait, when the cognitive load nearly reached its maximum. These findings might be used to reduce the risk for falls, especially of the elderly.
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Affiliation(s)
- N Bessot
- UNICAEN, INSERM, COMETE, GIP CYCERON, Normandie University , Caen, France
| | - R Polyte
- UNICAEN, INSERM, COMETE, GIP CYCERON, Normandie University , Caen, France
| | - M Quesney
- UNICAEN, INSERM, COMETE, GIP CYCERON, Normandie University , Caen, France
| | - J Bulla
- Department of Mathematics, University of Bergen , Bergen, Norway.,Department of Psychiatry and Psychotherapy, University Regensburg , Regensburg
| | - A Gauthier
- UNICAEN, INSERM, COMETE, GIP CYCERON, Normandie University , Caen, France
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9
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Saby M, Gauthier A, Barial S, Egoumenides L, Jover B. Supplementation with a Bioactive Melon Concentrate in Humans and Animals: Prevention of Oxidative Damages and Fatigue in the Context of a Moderate or Eccentric Physical Activity. Int J Environ Res Public Health 2020; 17:ijerph17041142. [PMID: 32053942 PMCID: PMC7068528 DOI: 10.3390/ijerph17041142] [Citation(s) in RCA: 2] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 02/05/2020] [Accepted: 02/07/2020] [Indexed: 11/16/2022]
Abstract
Exercise is recognized to provide both physical and psychological health benefits. However, oxidative stress can occur and induce muscular damages. SOD B®; M is a melon concentrate, well known to counteract oxidative stress and prevent its side effects. The present study aimed to evaluate the potential of the melon concentrate in the context of both a strong and isolated effort associated with deleterious effects, and a moderate and regular physical activity considered as beneficial. First, a preclinical study was set up on rats to evaluate its potential on the prevention of damages induced by an eccentric exercise. Secondly, the combined effect of the melon concentrate and a regular standardized physical training was studied on the overall physical condition of healthy subjects in a randomized, double-blind, placebo-controlled trial. Repeated measures Analysis of Variance (ANOVA), student’s t test and Mann–Whitney test were used for statistical analyses. Melon concentrate helped to prevent gastrocnemius damages induced by the eccentric exercise. It allowed a reduction of fibrosis by approximately 38% and a reduction of Tumor Necrosis Factor- α (TNF-α) plasma level by 28%. This supplementation also induced a rearrangement of myosin fibers and an increase in PGC-1α plasma level. In the clinical study, melon concentrate was able to decrease oxidative stress and C-Reactive protein (CRP) plasma level. Besides, magnesium (Mg) plasma level was higher in the context of a regular training performed by healthy subjects supplemented with the melon concentrate. Therefore, the melon concentrate allowed a better adaptation to effort linked to PGC-1α activation: a regulator of energy metabolism. The antioxidant properties of the melon concentrate and its ability to mobilize magnesium also suggest that the supplementation could induce a better resistance to fatigue and recovery during regular physical activity.
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Affiliation(s)
- Marion Saby
- EA7288 UFR Pharmacie, Université de Montpellier, CEDEX 5, 34093 Montpellier, France; (M.S.); (S.B.)
| | - Audrey Gauthier
- Bionov Research, 939 rue de la croix verte, 34090 Montpellier, France; (A.G.); (L.E.)
| | - Sandy Barial
- EA7288 UFR Pharmacie, Université de Montpellier, CEDEX 5, 34093 Montpellier, France; (M.S.); (S.B.)
| | - Laure Egoumenides
- Bionov Research, 939 rue de la croix verte, 34090 Montpellier, France; (A.G.); (L.E.)
| | - Bernard Jover
- PhyMedExp, INSERM CNRS, Université de Montpellier, IURC, CEDEX 5, 34295 Montpellier, France
- Correspondence:
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10
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Collignon C, Carton M, Brisse HJ, Pannier S, Gauthier A, Sarnacki S, Tiléa B, Savignoni A, Helfre S, Philippe-Chomette P, Cardoen L, Boccara O, Pierron G, Orbach D. Soft tissue sarcoma in children, adolescents and young adults: Outcomes according to compliance with international initial care guidelines. Eur J Surg Oncol 2019; 46:1277-1286. [PMID: 31839437 DOI: 10.1016/j.ejso.2019.11.518] [Citation(s) in RCA: 7] [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] [Received: 08/27/2019] [Revised: 11/14/2019] [Accepted: 11/29/2019] [Indexed: 01/17/2023] Open
Abstract
BACKGROUND Outcomes for adults with soft tissue sarcoma are better when managed at referral centers. Care guidelines advise for 5 main criteria: 1-Imaging before biopsy; 2-Tumor biopsy before surgery; 3-Multidiscipinary team discussion (MTD) before biopsy; 4-Biopsy in "expert centers"; 5-Somatic molecular biology feasible. The aim is to describe and assess the prognostic impact of initial management of STS according to the type of referring centers and the number of optimal criteria. METHODS Monocentric retrospective analysis of the management of 127 youths (0-25 years) with localized STS treated from 2006 to 2015. RESULTS Median age at diagnosis was 9.6 years (range: 025). Overall, only 41% patients had 5/5, 28% 3-4, 31% ≤2. No adequate imaging was performed before surgery/biopsy for 18% patients, no biopsy before treatment for 29%. Patients referred by "expert centers" had higher compliance to guidelines (P = 0.025). Upfront surgery was performed in 59/127 patients. Immediate re-operation was inversely related to the number of criteria (0% when 5 criteria vs. 14% for 3-4, 46% if ≤ 2; P < 0.001). For malignant tumors, outcome was better when 5 criteria were reached: 5 year EFS 90.8% (81.4-100.0%) vs. 71.6 for (60.4-84.9%; ≤4 criteria; p = 0.033), OS 93.6% (85.5-100%) vs. 79.5% (68.9-91.8%; p = 0.11), and LRFFS 90.6% (81.0-100.0) vs. 73.1% (62.0-86.3%; p = 0.047). CONCLUSION Less than half of the youths with STS are initially managed according to international guidelines, highlighting the need for better information about optimal management. These results plead for immediate management in reference centers to reduce initial burden of therapy.
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Affiliation(s)
- C Collignon
- SIREDO Oncology Center Care, Innovation and Research for Children, Adolescents and Young Adults with Cancer Institut Curie, PSL University, Paris, France.
| | - M Carton
- Department of Biostatistics, Institut Curie, PSL University, Paris, France
| | - H J Brisse
- Imaging Department, Institut Curie, Paris, France
| | - S Pannier
- Department of Orthopedic Pediatric Surgery, Necker Enfants Malades Hospital, Paris, France; Paris Descartes University, Sorbonne Paris Cité, Paris, France
| | - A Gauthier
- Department of Pathology, Institut Curie, Paris, France
| | - S Sarnacki
- Department of Pediatric Surgery and Urology, Necker Enfants Malades Hospital, Paris, France; Paris Descartes University, Sorbonne Paris Cité, Paris, France
| | - B Tiléa
- Department of Radiology, Robert Debré́ Hospital, Paris, France
| | - A Savignoni
- Department of Biostatistics, Institut Curie, PSL University, Paris, France
| | - S Helfre
- Department of Radiotherapy, Institut Curie, Paris, France
| | | | - L Cardoen
- Imaging Department, Institut Curie, Paris, France
| | - O Boccara
- Department of Dermatology and Reference Center for Genodermatoses and Rare Skin Diseases (MAGEC), Université Paris Descartes, Sorbonne Paris Cité, Institut Imagine, Hôpital Universitaire Necker-Enfants Malades, France
| | - G Pierron
- Department of Somatic Genetics, Institut Curie, Paris, France
| | - D Orbach
- SIREDO Oncology Center Care, Innovation and Research for Children, Adolescents and Young Adults with Cancer Institut Curie, PSL University, Paris, France
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11
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Soifer H, Gauthier A, Kemper AF, Rotundu CR, Yang SL, Xiong H, Lu D, Hashimoto M, Kirchmann PS, Sobota JA, Shen ZX. Band-Resolved Imaging of Photocurrent in a Topological Insulator. Phys Rev Lett 2019; 122:167401. [PMID: 31075004 DOI: 10.1103/physrevlett.122.167401] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Revised: 02/05/2019] [Indexed: 06/09/2023]
Abstract
We study the microscopic origins of photocurrent generation in the topological insulator Bi_{2}Se_{3} via time- and angle-resolved photoemission spectroscopy. We image the unoccupied band structure as it evolves following a circularly polarized optical excitation and observe an asymmetric electron population in momentum space, which is the spectroscopic signature of a photocurrent. By analyzing the rise times of the population we identify which occupied and unoccupied electronic states are coupled by the optical excitation. We conclude that photocurrents can only be excited via resonant optical transitions coupling to spin-orbital textured states. Our work provides a microscopic understanding of how to control photocurrents in systems with spin-orbit coupling and broken inversion symmetry.
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Affiliation(s)
- H Soifer
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - A Gauthier
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
- Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, California 94305, USA
| | - A F Kemper
- Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA
| | - C R Rotundu
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - S-L Yang
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
- Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, California 94305, USA
| | - H Xiong
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
- Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, California 94305, USA
| | - D Lu
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - M Hashimoto
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - P S Kirchmann
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - J A Sobota
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
- Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, California 94305, USA
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Z-X Shen
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
- Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, California 94305, USA
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12
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Hequet O, Poutrel S, Connes P, Revesz D, Chelghoum Y, Kebaili K, Cannas G, Gauthier A, Guironnet-Paquet A, Vocanson M, Nicolas JF, Renoux C, Raba M, Cognasse F, Bertrand Y, Hot A, Joly P. Automatic depletion with Spectra Optia allows a safe 16% reduction of red blood cell pack consumption in exchanged sickle cell anemia patients. Transfusion 2019; 59:1692-1697. [PMID: 30747440 DOI: 10.1111/trf.15188] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 01/08/2019] [Accepted: 01/09/2019] [Indexed: 01/26/2023]
Abstract
BACKGROUND Chronic red blood cell exchanges (RBCXs) are frequently used to prevent complications in patients with sickle cell anemia, but the scarcity of matched red blood cell packs (RBCPs) is a serious concern. The main goal of this study was to compare the number of RBCPs used during RBCXs between the Spectra Optia (SO) device (with the automatic depletion step) and the former Cobe Spectra (CSP) device. STUDY DESIGN AND METHODS The performances and safety of 300 SO sessions using the automatic depletion step (SO/DE) in 50 patients with sickle cell anemia under a chronic transfusion program over a 1-year period were prospectively analyzed. The numbers of RBCPs saved using this protocol compared to the SO device without depletion and to the CSP device were determined. RESULTS The SO/DE protocol appeared to be safe, as only 5% and 17% of the sessions were characterized by a significant decrease in blood pressure and increase in heart rate (grade 2 adverse events), respectively. Postapheresis hematocrit and fraction of cells remaining reached expected values. The SO/DE protocol required 16% fewer RBCPs compared to SO without depletion, allowing a mean saving of 12 RBCPs per patient and per year and 13% fewer compared to CSP device. Interestingly, the saving was more important for patients with high total blood volume and/or high preapheresis hematocrit. CONCLUSION The SO/DE protocol is an efficient, safe and cost-effective procedure for patients with sickle cell anemia under a chronic transfusion program.
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Affiliation(s)
- O Hequet
- Établissement Français du Sang Auvergne-Rhône-Alpes, Apheresis unit, Centre Hospitalier Lyon Sud Pierre Bénite, France.,Scientific Department, Établissement Français du Sang Auvergne-Rhône-Alpes, Saint-Etienne, France.,Laboratory of Allergology and Clinical Immunology, CIRI, Lyon, France
| | - S Poutrel
- Centre de référence constitutif des syndromes drépanocytaires majeurs, des thalassémies et des autres maladies de l'érythropoïèse, Service de Médecine interne, Hôpital Edouard Herriot, Hospices Civils de Lyon, Lyon, France
| | - P Connes
- Laboratoire Interuniversitaire de Biologie de la Motricité (LIBM) EA7424, Equipe "Biologie vasculaire et du globule rouge", Université Claude Bernard Lyon 1, COMUE Lyon, Villeurbanne, France.,Laboratoire d'Excellence sur le globule rouge (Labex GR-Ex), Paris, France.,Institut Universitaire de France, Paris, France
| | - D Revesz
- Établissement Français du Sang Auvergne-Rhône-Alpes, Apheresis unit, Centre Hospitalier Lyon Sud Pierre Bénite, France
| | - Y Chelghoum
- Établissement Français du Sang Auvergne-Rhône-Alpes, Apheresis unit, Centre Hospitalier Lyon Sud Pierre Bénite, France
| | - K Kebaili
- Hospices Civils de Lyon, Pediatric Hematology, Institut d'Hematologie et d'Oncologie Pédiatrique, Lyon, France
| | - G Cannas
- Centre de référence constitutif des syndromes drépanocytaires majeurs, des thalassémies et des autres maladies de l'érythropoïèse, Service de Médecine interne, Hôpital Edouard Herriot, Hospices Civils de Lyon, Lyon, France
| | - A Gauthier
- Hospices Civils de Lyon, Pediatric Hematology, Institut d'Hematologie et d'Oncologie Pédiatrique, Lyon, France
| | - A Guironnet-Paquet
- Scientific Department, Établissement Français du Sang Auvergne-Rhône-Alpes, Saint-Etienne, France.,Laboratory of Allergology and Clinical Immunology, CIRI, Lyon, France
| | - M Vocanson
- Laboratory of Allergology and Clinical Immunology, CIRI, Lyon, France
| | - J F Nicolas
- Laboratory of Allergology and Clinical Immunology, CIRI, Lyon, France
| | - C Renoux
- Laboratoire Interuniversitaire de Biologie de la Motricité (LIBM) EA7424, Equipe "Biologie vasculaire et du globule rouge", Université Claude Bernard Lyon 1, COMUE Lyon, Villeurbanne, France.,Laboratoire d'Excellence sur le globule rouge (Labex GR-Ex), Paris, France.,Laboratoire de Biochimie et Biologie moléculaire Grand Est, Groupement hospitalier Est, Hospices Civils de Lyon, Bron, France
| | - M Raba
- Etablissement Français du Sang Rhône Alpes, Distribution unit, Centre Hospitalier Lyon Sud, Pierre-Bénite, France
| | - F Cognasse
- Scientific Department, Établissement Français du Sang Auvergne-Rhône-Alpes, Saint-Etienne, France.,EA3064-GIMAP, Université de Lyon, Saint-Étienne, France
| | - Y Bertrand
- Hospices Civils de Lyon, Pediatric Hematology, Institut d'Hematologie et d'Oncologie Pédiatrique, Lyon, France
| | - A Hot
- Centre de référence constitutif des syndromes drépanocytaires majeurs, des thalassémies et des autres maladies de l'érythropoïèse, Service de Médecine interne, Hôpital Edouard Herriot, Hospices Civils de Lyon, Lyon, France
| | - P Joly
- Laboratoire Interuniversitaire de Biologie de la Motricité (LIBM) EA7424, Equipe "Biologie vasculaire et du globule rouge", Université Claude Bernard Lyon 1, COMUE Lyon, Villeurbanne, France.,Laboratoire d'Excellence sur le globule rouge (Labex GR-Ex), Paris, France.,Laboratoire de Biochimie et Biologie moléculaire Grand Est, Groupement hospitalier Est, Hospices Civils de Lyon, Bron, France
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13
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Martin T, Gauthier A, Ying Z, Benguigui N, Moussay S, Bulla J, Davenne D, Bessot N. Effect of sleep deprivation on diurnal variation of vertical perception and postural control. J Appl Physiol (1985) 2018. [PMID: 29543136 DOI: 10.1152/japplphysiol.00595.2017] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The aim of the study was to test the effect of total sleep deprivation on performance and time-of-day pattern of subjective visual vertical (SVV) and postural control. Nineteen healthy, young participants (4 women and 15 men 21.9 ± 1.2 yr) were engaged in two counterbalanced experimental sessions with or without total sleep deprivation. Oral temperature, Karolinska Sleepiness Scale, and visual analogic scale for fatigue, postural control, and SVV were randomly measured every 4 h, from 0600 to 2200. A linear mixed model was used to capture the effect of time of day and sleep condition as factors. A classical adjusted COSINOR function was then used to modelize this daily variation. After the control night of sleep, SVV as well as oral temperature, sleepiness, and fatigue showed significant time-of-day variation, contrasting with measures of postural control which remained stable across the day. After sleep deprivation, SVV showed no diurnal variation, but its mean deviation value increased by 29%. Postural control capability also decreased after sleep deprivation, with a higher center of pressure surface (+70.4%) and total length (+7.37%) but remained stable throughout the day. These results further confirm the negative effect of sleep loss on postural control capability. Even if a direct relationship cannot be confirmed, the disruption of SVV capacity after sleep deprivation could strongly play a role in postural control capacity changes. Sleep deprivation should be considered as a potent factor involved in balance loss and subsequent fall. NEW & NOTEWORTHY The topic of sleep deprivation and postural control is not understood, with discrepancy among results. This study described that postural control displays a stable level throughout the day and that sleep deprivation, even if it increases postural sway, does not affect this stable diurnal pattern. The modification of the perception of the vertical level after sleep deprivation could strongly play a role in the observed changes in postural control capacity.
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Affiliation(s)
- T Martin
- Normandie University, UNICAEN, INSERM, COMETE, Caen , France
| | - A Gauthier
- Normandie University, UNICAEN, INSERM, COMETE, Caen , France
| | - Z Ying
- Normandie University, UNICAEN, INSERM, COMETE, Caen , France
| | - N Benguigui
- Université de Caen Basse-Normandie, EA4260 CESAMS, Caen, France
| | - S Moussay
- Normandie University, UNICAEN, INSERM, COMETE, Caen , France
| | - J Bulla
- Department of Mathematics, University of Bergen , Bergen , Norway
| | - D Davenne
- Normandie University, UNICAEN, INSERM, COMETE, Caen , France
| | - N Bessot
- Normandie University, UNICAEN, INSERM, COMETE, Caen , France
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14
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Gerber S, Yang SL, Zhu D, Soifer H, Sobota JA, Rebec S, Lee JJ, Jia T, Moritz B, Jia C, Gauthier A, Li Y, Leuenberger D, Zhang Y, Chaix L, Li W, Jang H, Lee JS, Yi M, Dakovski GL, Song S, Glownia JM, Nelson S, Kim KW, Chuang YD, Hussain Z, Moore RG, Devereaux TP, Lee WS, Kirchmann PS, Shen ZX. Femtosecond electron-phonon lock-in by photoemission and x-ray free-electron laser. Science 2018; 357:71-75. [PMID: 28684521 DOI: 10.1126/science.aak9946] [Citation(s) in RCA: 130] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Accepted: 05/03/2017] [Indexed: 11/02/2022]
Abstract
The interactions that lead to the emergence of superconductivity in iron-based materials remain a subject of debate. It has been suggested that electron-electron correlations enhance electron-phonon coupling in iron selenide (FeSe) and related pnictides, but direct experimental verification has been lacking. Here we show that the electron-phonon coupling strength in FeSe can be quantified by combining two time-domain experiments into a "coherent lock-in" measurement in the terahertz regime. X-ray diffraction tracks the light-induced femtosecond coherent lattice motion at a single phonon frequency, and photoemission monitors the subsequent coherent changes in the electronic band structure. Comparison with theory reveals a strong enhancement of the coupling strength in FeSe owing to correlation effects. Given that the electron-phonon coupling affects superconductivity exponentially, this enhancement highlights the importance of the cooperative interplay between electron-electron and electron-phonon interactions.
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Affiliation(s)
- S Gerber
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA.,SwissFEL and Laboratory for Micro and Nanotechnology, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - S-L Yang
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA.,Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA 94305, USA
| | - D Zhu
- Linac Coherent Light Source (LCLS), SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - H Soifer
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA
| | - J A Sobota
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA.,Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - S Rebec
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA.,Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA 94305, USA
| | - J J Lee
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA.,Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA 94305, USA
| | - T Jia
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA.,Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA 94305, USA
| | - B Moritz
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA
| | - C Jia
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA
| | - A Gauthier
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA.,Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA 94305, USA
| | - Y Li
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA
| | - D Leuenberger
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA
| | - Y Zhang
- International Center for Quantum Materials, Peking University, Beijing 100871, China
| | - L Chaix
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA
| | - W Li
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA
| | - H Jang
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - J-S Lee
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - M Yi
- Department of Physics, University of California-Berkeley, Berkeley, CA 94720, USA
| | - G L Dakovski
- Linac Coherent Light Source (LCLS), SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - S Song
- Linac Coherent Light Source (LCLS), SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - J M Glownia
- Linac Coherent Light Source (LCLS), SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - S Nelson
- Linac Coherent Light Source (LCLS), SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - K W Kim
- Department of Physics, Chungbuk National University, Cheongju 28644, Korea
| | - Y-D Chuang
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Z Hussain
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - R G Moore
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA
| | - T P Devereaux
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA
| | - W-S Lee
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA.
| | - P S Kirchmann
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA.
| | - Z-X Shen
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA. .,Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA 94305, USA
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15
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Callard D, Gauthier A, Maffiuletti N, Davenne D, Van Hoecke J. Fluctuations nycthémérales des capacités musculaires chez l’homme sportif : avec sommeil versus en privation de sommeil. ACTA ACUST UNITED AC 2017. [DOI: 10.1051/jbio/2000194030165] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [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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16
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Ager C, Reilley M, Nicholas C, Bartkowiak T, Jaiswal A, Curran M, Albershardt TC, Bajaj A, Archer JF, Reeves RS, Ngo LY, Berglund P, ter Meulen J, Denis C, Ghadially H, Arnoux T, Chanuc F, Fuseri N, Wilkinson RW, Wagtmann N, Morel Y, Andre P, Atkins MB, Carlino MS, Ribas A, Thompson JA, Choueiri TK, Hodi FS, Hwu WJ, McDermott DF, Atkinson V, Cebon JS, Fitzharris B, Jameson MB, McNeil C, Hill AG, Mangin E, Ahamadi M, van Vugt M, van Zutphen M, Ibrahim N, Long GV, Gartrell R, Blake Z, Simoes I, Fu Y, Saito T, Qian Y, Lu Y, Saenger YM, Budhu S, De Henau O, Zappasodi R, Schlunegger K, Freimark B, Hutchins J, Barker CA, Wolchok JD, Merghoub T, Burova E, Allbritton O, Hong P, Dai J, Pei J, Liu M, Kantrowitz J, Lai V, Poueymirou W, MacDonald D, Ioffe E, Mohrs M, Olson W, Thurston G, Capasso C, Frascaro F, Carpi S, Tähtinen S, Feola S, Fusciello M, Peltonen K, Martins B, Sjöberg M, Pesonen S, Ranki T, Kyruk L, Ylösmäki E, Cerullo V, Cerignoli F, Xi B, Guenther G, Yu N, Muir L, Zhao L, Abassi 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Millar D, Speers E, Ruth N, Wong G, Thimme R, Adams D, Cobbold M, Thomas R, Hendrickx W, Al-Muftah M, Decock J, Wong MKK, Morse M, McDermott DF, Clark JI, Kaufman HL, Daniels GA, Hua H, Rao T, Dutcher JP, Kang K, Saunthararajah Y, Velcheti V, Kumar V, Anwar F, Verma A, Chheda Z, Kohanbash G, Sidney J, Okada K, Shrivastav S, Carrera DA, Liu S, Jahan N, Mueller S, Pollack IF, Carcaboso AM, Sette A, Hou Y, Okada H, Field JJ, Zeng W, Shih VFS, Law CL, Senter PD, Gardai SJ, Okeley NM, Penny SA, Abelin JG, Saeed AZ, Malaker SA, Myers PT, Shabanowitz J, Ward ST, Hunt DF, Cobbold M, Profusek P, Wood L, Shepard D, Grivas P, Kapp K, Volz B, Oswald D, Wittig B, Schmidt M, Sefrin JP, Hillringhaus L, Lifke V, Lifke A, Skaletskaya A, Ponte J, Chittenden T, Setiady Y, Valsesia-Wittmann S, Sivado E, Thomas V, El Alaoui M, Papot S, Dumontet C, Dyson M, McCafferty J, El Alaoui S, Verma A, Kumar V, Bommareddy PK, Kaufman HL, Zloza A, Kohlhapp F, Silk AW, Jhawar S, Paneque T, Bommareddy PK, Kohlhapp F, Newman J, Beltran P, Zloza A, Kaufman HL, Cao F, Hong BX, Rodriguez-Cruz T, Song XT, Gottschalk S, Calderon H, Illingworth S, Brown A, Fisher K, Seymour L, Champion B, Eriksson E, Wenthe J, Hellström AC, Paul-Wetterberg G, Loskog A, Eriksson E, Milenova I, Wenthe J, Ståhle M, Jarblad-Leja J, Ullenhag G, Dimberg A, Moreno R, Alemany R, Loskog A, Eriksson E, Milenova I, Moreno R. 31st Annual Meeting and Associated Programs of the Society for Immunotherapy of Cancer (SITC 2016): part two. J Immunother Cancer 2016. [PMCID: PMC5123381 DOI: 10.1186/s40425-016-0173-6] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Béquignon E, Teissier N, Gauthier A, Brugel L, De Kermadec H, Coste A, Prulière-Escabasse V. Emergency Department care of childhood epistaxis. Emerg Med J 2016; 34:543-548. [PMID: 27542804 DOI: 10.1136/emermed-2015-205528] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [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: 11/02/2015] [Revised: 07/17/2016] [Accepted: 07/24/2016] [Indexed: 11/03/2022]
Abstract
OBJECTIVE The aim of this review is to determine an efficient and safe primary strategy care for paediatric epistaxis. DATA SOURCES We searched PubMed and Cochrane databases for studies referenced with key words 'epistaxis AND childhood'. This search yielded 32 research articles about primary care in childhood epistaxis (from 1989 to 2015). Bibliographic references found in these articles were also examined to identify pertinent literature. We compared our results to the specific management of adult epistaxis classically described in the literature. RESULTS Epistaxis is one of the most common reasons for referral of children to a hospital ENT outpatient department. The bleeding usually originates from the anterior septum, as opposed to adults. Crusting, digital trauma, foreign bodies and nasal colonisation with Staphylococcus aureus have been suggested as specific nosebleed factors in children. Rare aetiologies as juvenile nasopharyngeal angiofibroma appear later during adolescence. There are different modes of management of mild epistaxis, which begin with clearing out blood clots and bidigital compression. An intranasal topical local anaesthetic and decongestant can be used over 6 years of age. In case of active bleeding, chemical cauterisation is preferred to anterior packing and electric cauterisation but is only feasible if the bleeding site is clearly visible. In case of non-active bleeding in children, and in those with recurrent idiopathic epistaxis, antiseptic cream is easy to apply and can avoid 'acrobatic' cauterisation liable to cause further nasal cavity trauma. CONCLUSIONS Aetiologies and treatment vary with patient age and the existence or not of active bleeding at the time of the examination. Local treatments are usually easy to perform, but physicians have to ponder their indications depending on the possible complications in order to inform parents and to know paediatric epistaxis specificities.
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Affiliation(s)
- E Béquignon
- Department of Oto-rhino-laryngology Surgery, Intercommunal Hospital, Créteil, France.,INSERM U955, Créteil, France.,Université Paris-Est, Créteil, France.,Department of Oto-rhino-laryngology, Henri Mondor Hospital, AP-HP, Créteil, France
| | - N Teissier
- Department of Paediatric otorhinolaryngology, Robert Debré Hospital, AP-HP, Paris, France.,INSERM U1141, Paris, France
| | - A Gauthier
- Department of Oto-rhino-laryngology Surgery, Intercommunal Hospital, Créteil, France
| | - L Brugel
- Department of Oto-rhino-laryngology Surgery, Intercommunal Hospital, Créteil, France
| | - H De Kermadec
- Department of Oto-rhino-laryngology Surgery, Intercommunal Hospital, Créteil, France
| | - A Coste
- Department of Oto-rhino-laryngology Surgery, Intercommunal Hospital, Créteil, France.,INSERM U955, Créteil, France.,Université Paris-Est, Créteil, France.,Department of Oto-rhino-laryngology, Henri Mondor Hospital, AP-HP, Créteil, France
| | - V Prulière-Escabasse
- Department of Oto-rhino-laryngology Surgery, Intercommunal Hospital, Créteil, France.,INSERM U955, Créteil, France.,Université Paris-Est, Créteil, France
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Zouabi A, Quarck G, Martin T, Grespinet M, Gauthier A. Is there a circadian rhythm of postural control and perception of the vertical? Chronobiol Int 2016; 33:1320-1330. [DOI: 10.1080/07420528.2016.1215993] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- A. Zouabi
- Normandie University, UFR STAPS, France
- UNICAEN, COMETE, Caen, France
- Inserm, U 1075 COMETE, Caen, France
- Laboratory of Functional Neurophysiology and Pathology, Research Unit UR/11ES09, Department of Biological Sciences, Faculty of Science of Tunis, University Tunis El Manar Tunis, Tunisia
| | - G. Quarck
- Normandie University, UFR STAPS, France
- UNICAEN, COMETE, Caen, France
- Inserm, U 1075 COMETE, Caen, France
| | - T. Martin
- Normandie University, UFR STAPS, France
- UNICAEN, COMETE, Caen, France
- Inserm, U 1075 COMETE, Caen, France
| | - M. Grespinet
- Normandie University, UFR STAPS, France
- UNICAEN, COMETE, Caen, France
- Inserm, U 1075 COMETE, Caen, France
| | - A. Gauthier
- Normandie University, UFR STAPS, France
- UNICAEN, COMETE, Caen, France
- Inserm, U 1075 COMETE, Caen, France
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Carillon J, Gauthier A, Barial S, Tournier M, Gayrard N, Lajoix AD, Jover B. Relaxin and atrial natriuretic peptide pathways participate in the anti-fibrotic effect of a melon concentrate in spontaneously hypertensive rats. Food Nutr Res 2016; 60:30985. [PMID: 27079780 PMCID: PMC4832218 DOI: 10.3402/fnr.v60.30985] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Revised: 03/04/2016] [Accepted: 03/17/2016] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND In spontaneously hypertensive rats (SHR), a model of human essential hypertension, oxidative stress is involved in the development of cardiac hypertrophy and fibrosis associated with hypertension. Dietary supplementation with agents exhibiting antioxidant properties could have a beneficial effect in remodeling of the heart. We previously demonstrated a potent anti-hypertrophic effect of a specific melon (Cucumis melo L.) concentrate with antioxidant properties in spontaneously hypertensive rats. Relaxin and atrial natriuretic peptide (ANP) were reported to reduce collagen deposition and fibrosis progression in various experimental models. OBJECTIVE The aim of the present investigation was to test the hypothesis that, beside reduction in oxidative stress, the melon concentrate may act through relaxin, its receptor (relaxin/insulin-like family peptide receptor 1, RXFP1), and ANP in SHR. DESIGN AND RESULTS The melon concentrate, given orally during 4 days, reduced cardiomyocyte size (by 25%) and totally reversed cardiac collagen content (Sirius red staining) in SHR but not in their normotensive controls. Treatment with the melon concentrate lowered cardiac nitrotyrosine-stained area (by 45%) and increased by 17-19% the cardiac expression (Western blot) of superoxide dismutase (SOD) and glutathione peroxidase. In addition, plasma relaxin concentration was normalized while cardiac relaxin (Western blot) was lowered in treated SHR. Cardiac relaxin receptor level determined by immunohistochemical analysis increased only in treated SHR. Similarly, the melon concentrate reversed the reduction of plasma ANP concentration and lowered its cardiac expression. CONCLUSIONS The present results demonstrate that reversal of cardiac fibrosis by the melon concentrate involves antioxidant defenses, as well as relaxin and ANP pathways restoration. It is suggested that dietary SOD supplementation could be a useful additional strategy against cardiac hypertrophy and fibrosis.
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Affiliation(s)
- Julie Carillon
- EA7288 Université de Montpellier, Montpellier, France.,Bionov Research, Montpellier, France
| | | | - Sandy Barial
- EA7288 Université de Montpellier, Montpellier, France
| | | | | | | | - Bernard Jover
- EA7288 Université de Montpellier, Montpellier, France;
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Chesnais V, Renneville A, Toma A, Passet M, Gauthier A, Delaunay J, Rose C, Stamatoullas A, Beyne-Rauzy O, Fenaux P, Dreyfus F, Preudhomme C, Fontenay M, Kosmider O. 148 CLONAL EVOLUTION OF HEMATOPOIETIC STEM CELL UNDER TREATMENT BY LENALIDOMIDE IN NON DEL(5Q) MDS. Leuk Res 2015. [DOI: 10.1016/s0145-2126(15)30149-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Aguiar-Ibáñez R, Palencia R, Kandaswamy P, Flavin J, Gauthier A, Davies MJ. Development Of A Model To Assess The Cost-Effectiveness Of Therapies For Patients With Type 2 Diabetes Mellitus (T2DM) Following A Reference Model Framework. Value Health 2014; 17:A562. [PMID: 27201858 DOI: 10.1016/j.jval.2014.08.1859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
| | - R Palencia
- Boehringer Ingelheim GmbH, Ingelheim am Rhein, Germany
| | | | - J Flavin
- Boehringer Ingelheim Canada Ltd, Burlingon, ON, Canada
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Bec M, Cognet M, Taieb V, Pacou M, Gauthier A. French Utility Elicitation in Previously Treated European Patients with Indolent Non-Hodgkin Lymphoma (INHL). Value Health 2014; 17:A646. [PMID: 27202323 DOI: 10.1016/j.jval.2014.08.2340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
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Piscitelli P, Brandi M, Cawston H, Gauthier A, Kanis JA, Compston J, Borgström F, Cooper C, McCloskey E. Epidemiological burden of postmenopausal osteoporosis in Italy from 2010 to 2020: estimations from a disease model. Calcif Tissue Int 2014; 95:419-27. [PMID: 25200337 DOI: 10.1007/s00223-014-9910-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Accepted: 08/12/2014] [Indexed: 12/15/2022]
Abstract
The article describes the adaptation of a model to estimate the burden of postmenopausal osteoporosis in women aged 50 years and over in Italy between 2010 and 2020. For this purpose, a validated postmenopausal osteoporosis disease model developed for Sweden was adapted to Italy. For each year of the study, the 'incident cohort' (women experiencing a first osteoporotic fracture) was identified and run through a Markov model using 1-year cycles until 2020. Health states were based on the number of fractures and deaths. Fracture by site (hip, clinical vertebral, non-hip non-vertebral) was tracked for each health state. Transition probabilities reflected fracture site-specific risk of death and subsequent fractures. Model inputs specific to Italy included population size and life tables from 1970 to 2020, incidence of hip fracture and BMD by age in the general population (mean and standard deviation). The model estimated that the number of postmenopausal osteoporotic women would increase from 3.3 million to 3.7 million between 2010 and 2020 (+14.3%). Assuming unchanged incidence rates by age group over time, the model predicted the overall number of osteoporotic fractures to increase from 285.0 to 335.8 thousand fractures between 2010 and 2020 (+17.8%). The estimated expected increases in hip, vertebral and non-hip non-vertebral fractures were 22.3, 17.2 and 16.3%, respectively. Due to demographic changes, the burden of fractures is expected to increase markedly by 2020.
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Affiliation(s)
- P Piscitelli
- I.O.S., Southern Italy Hospital Institute, Centro Direzionale, Isola E3, Palazzo Avalon, Naples, 80143, Italy,
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Cognet M, Druais S, Gervais F, Gauthier A, Abrams KR. Cost of Previously Treated Chronic Lymphocytic Leukemia (CLL) and Indolent Non-Hodgkin's Lymphoma (INHL) in the United Kingdom (UK). Value Health 2014; 17:A549. [PMID: 27201785 DOI: 10.1016/j.jval.2014.08.1787] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
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Guillemot J, Boval MC, Gauthier A. Non-Interventional Research Ethical Requirements in England and France: Shared Experience From A Binational Research Project. Value Health 2014; 17:A587. [PMID: 27201994 DOI: 10.1016/j.jval.2014.08.2005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
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Poullié AI, Gauthier A, Cognet M, Clementz M, Späth HM, Perrier L, Scemama O, Rumeau Pichon C, Harousseau JL. A Cost-Effectiveness Analysis of Treatment for Mild to Moderate Obstructive Sleep Apnea-Hypopnea Syndrome (OSAHS) in France. Value Health 2014; 17:A597. [PMID: 27202052 DOI: 10.1016/j.jval.2014.08.2062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
- A I Poullié
- Haute Autorité de santé, Saint-Denis La Plaine, France
| | | | | | | | - H M Späth
- ISPB - Faculté de Pharmacie - Université Lyon 1, Lyon, France
| | - L Perrier
- Cancer Centre Léon Bérard, Lyon, France
| | - O Scemama
- Haute Autorité de santé, Saint-Denis La Plaine, France
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Jiang Y, Gervais F, Gauthier A, Baptiste C, Martinon P, Bresse X. A comparative public health and budget impact analysis of pneumococcal vaccines. The french case. Value Health 2014; 17:A668. [PMID: 27202446 DOI: 10.1016/j.jval.2014.08.2467] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
| | | | | | | | | | - X Bresse
- Sanofi Pasteur MSD, Lyon, France
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Pacou M, Gauthier A, Taieb V, Bec M, Belhadi D, Guillemot J. Proposed Checklist for Non-Statisticians To Assess the Quality of A Network Meta-Analysis in the Context of A Nice Submission. Value Health 2014; 17:A579-A580. [PMID: 27201949 DOI: 10.1016/j.jval.2014.08.1960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
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Chapon PA, Bulla J, Gauthier A, Moussay S. On the importance of telemetric temperature sensor location during intraperitoneal implantation in rats. Lab Anim 2014; 48:114-23. [PMID: 24585934 DOI: 10.1177/0023677214522035] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This study aims to assess the thermal homogeneity of the intraperitoneal (IP) cavity and the relevance of using a fixed telemetric temperature sensor at a given location in studying rodents. Ten rats were intraperitoneally implanted with three Jonah® capsules each; after assessing the accuracy and reliability of the sensors. Two capsules were attached, one to the right iliac fossa (RIF) and the other to the left hypochondrium (LH), and another was placed between the intestines but not attached (Free). In the ex vivo condition, the differences between sensors and reference values remained in the range of ±0.1. In the in vivo condition, each sensor enabled the observation of temperature patterns. However, sensor location affected mean and median temperature values while the rats were moving freely. Indeed, temperature data collected in the LH were 0.1 significantly higher than those collected in the RIF and temperature data collected in the LH were 0.11 significantly higher than those collected with the Free capsules. In in vivo conditions, intra-sensor variability of temperature data was not affected by sensor location. Taking into account sensor accuracy, similar intra-sensor variability, and mean differences observed between the three locations, the impact of sensor location within the IP cavity could be considered negligible. In in vivo conditions, temperature differences between locations regularly exceeded ±0.2 and reached up to 2.5. These extreme values could be explained by behavioral factors such as food or water intake. Finally, considering the good thermal homogeneity of the IP cavity and possible adverse consequences of sensor attachment, it seems better to let sensors range free within the cavity.
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Luis P, Gauthier A, Trouvelot S, Poinssot B, Frettinger P. Identification of Plasmopara viticola genes potentially involved in pathogenesis on grapevine suggests new similarities between oomycetes and true fungi. Phytopathology 2013; 103:1035-44. [PMID: 23634808 DOI: 10.1094/phyto-06-12-0121-r] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Plant diseases caused by fungi and oomycetes result in significant economic losses every year. Although phylogenetically distant, these organisms share many common features during infection. We identified genes in the oomycete Plasmopara viticola that are potentially involved in pathogenesis in grapevine by using fungal databases and degenerate primers. Fragments of P. viticola genes encoding NADH-ubiquinone oxidoreductase (PvNuo), laccase (PvLac), and invertase (PvInv) were obtained. PvNuo was overexpressed at 2 days postinoculation (dpi), during the development of the first hyphal structures and haustoria. PvLac was overexpressed at 5 dpi when genes related to pterostilbene biosynthesis were induced in grapevine. Transcript level for PvInv increased between 1 and 4 dpi before reaching a plateau. These results might suggest a finely tuned strategy of infection depending on nutrition and plant response. Phylogenetic analyses of PvNuo showed that P. viticola clustered with other oomycetes and was associated with brown algae and diatoms, forming a typical Straminipila clade. Based on the comparison of available sequences for laccases and invertases, the group formed by P. viticola and other oomycetes tended to be more closely related to Opisthokonta than to Straminipila. Convergent evolution or horizontal gene transfer could explain the presence of fungus-like genes in P. viticola.
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Verjat-Trannoy D, Gauthier A, Ertzscheid MA, Jouzeau N, Monier S, Zaro-Goni D, Astagneau P. P148: Hand hygiene communication from healthcare workers to patients: results of a pilot survey in several healthcare facilities. Antimicrob Resist Infect Control 2013. [PMCID: PMC3688156 DOI: 10.1186/2047-2994-2-s1-p148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
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Ng CKY, Gauthier A, Mackay A, Lambros MBK, Rodrigues DN, Arnoud L, Lacroix-Triki M, Penault-Llorca F, Baranzelli MC, Sastre-Garau X, Lord CJ, Zvelebil M, Mitsopoulos C, Ashworth A, Natrajan R, Weigelt B, Delattre O, Cottu P, Reis-Filho JS, Vincent-Salomon A. Abstract PD05-08: Genomic characterisation of invasive breast cancers with heterogeneous HER2 gene amplification. Cancer Res 2012. [DOI: 10.1158/0008-5472.sabcs12-pd05-08] [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: 11/16/2022]
Abstract
Abstract
Aims: HER2 gene amplification is observed in up to 15% of breast carcinomas. In a rare subset of breast cancers classified as HER2-positive by immunohistochemistry and in situ hybridisation, HER2 overexpression and gene amplification are restricted to a subset of >30% but not all cancer cells. Here we sought to characterise the repertoire of gene copy number aberrations and somatic mutations in the HER2-positive and HER2-negative components of cases with heterogeneous HER2 overexpression and gene amplification.
Material and methods: Cases diagnosed as HER2 positive but with >30% but <100% of cells displaying HER2 overexpression were retrieved from the authors' institutions. HER2 heterogeneity status was re-assessed using immunohistochemistry and chromogenic and/ or fluorescence in situ hybridisation. For cases with confirmed HER2 gene amplification heterogeneity, HER2-positive and HER2-negative components were microdissected from tissue sections stained with the Herceptest antibody. DNA samples extracted from both components of each case were subjected to microarray-based comparative genomic hybridisation (aCGH), using a 32K BAC array platform with 50Kb resolution. The HER2-positive and HER2-negative components of cases with frozen material were also subjected to massively parallel targeted exome sequencing.
Results: Twelve cases yielded sufficient DNA for aCGH analysis. Tumours were preferentially ER positive (83%) and of histological grade 3 (67%). The HER2-positive and HER2-negative components of all cases shared most of the copy number aberrations. A pairwise comparison of the genomic profiles of the two components from each case revealed that in ten of the twelve cases, copy number aberrations in addition to 17q12 amplification encompassing the HER2 gene locus were restricted to one of the two components. Exome sequencing of two cases suggested that the HER2-positive and HER2-negative components from each case harboured >30 somatic mutations in common, including identical TP53 somatic mutations in both components of each case. The HER2-negative component of one of the cases displayed a somatic mutation in NRG2, an ERBB receptor ligand, and the HER2-negative component of the other case harboured a mutation in PTTG1IP, a proto-oncogene with putative oestrogen receptor elements.
Conclusions: Our results demonstrate that in HER2-positive breast cancers with heterogeneous HER2 gene amplification, the HER2-positive and HER2-negative components are clonally related. The distinct genomic profiles of HER2-positive and HER2-negative components, however, suggest that, at least in some of these cases, HER2 amplification may constitute a relatively late event in tumour evolution. Exome sequencing revealed mutations restricted to the HER2-negative components of HER2-positive tumours with heterogeneous HER2 overexpression/gene amplification, which may constitute potential drivers in the absence of HER2 overexpression/gene amplification.
Citation Information: Cancer Res 2012;72(24 Suppl):Abstract nr PD05-08.
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Affiliation(s)
- CKY Ng
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, United Kingdom; Institut Curie, Paris, France; CRB Ferdinand Cabanne, Centre Georges François Leclerc, Dijon, France; Institut Claudius Regaud, Toulouse, France; Centre Jean Perrin, Clermont-Ferrand, France; Centre Oscar Lambret, Lille, France
| | - A Gauthier
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, United Kingdom; Institut Curie, Paris, France; CRB Ferdinand Cabanne, Centre Georges François Leclerc, Dijon, France; Institut Claudius Regaud, Toulouse, France; Centre Jean Perrin, Clermont-Ferrand, France; Centre Oscar Lambret, Lille, France
| | - A Mackay
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, United Kingdom; Institut Curie, Paris, France; CRB Ferdinand Cabanne, Centre Georges François Leclerc, Dijon, France; Institut Claudius Regaud, Toulouse, France; Centre Jean Perrin, Clermont-Ferrand, France; Centre Oscar Lambret, Lille, France
| | - MBK Lambros
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, United Kingdom; Institut Curie, Paris, France; CRB Ferdinand Cabanne, Centre Georges François Leclerc, Dijon, France; Institut Claudius Regaud, Toulouse, France; Centre Jean Perrin, Clermont-Ferrand, France; Centre Oscar Lambret, Lille, France
| | - DN Rodrigues
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, United Kingdom; Institut Curie, Paris, France; CRB Ferdinand Cabanne, Centre Georges François Leclerc, Dijon, France; Institut Claudius Regaud, Toulouse, France; Centre Jean Perrin, Clermont-Ferrand, France; Centre Oscar Lambret, Lille, France
| | - L Arnoud
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, United Kingdom; Institut Curie, Paris, France; CRB Ferdinand Cabanne, Centre Georges François Leclerc, Dijon, France; Institut Claudius Regaud, Toulouse, France; Centre Jean Perrin, Clermont-Ferrand, France; Centre Oscar Lambret, Lille, France
| | - M Lacroix-Triki
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, United Kingdom; Institut Curie, Paris, France; CRB Ferdinand Cabanne, Centre Georges François Leclerc, Dijon, France; Institut Claudius Regaud, Toulouse, France; Centre Jean Perrin, Clermont-Ferrand, France; Centre Oscar Lambret, Lille, France
| | - F Penault-Llorca
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, United Kingdom; Institut Curie, Paris, France; CRB Ferdinand Cabanne, Centre Georges François Leclerc, Dijon, France; Institut Claudius Regaud, Toulouse, France; Centre Jean Perrin, Clermont-Ferrand, France; Centre Oscar Lambret, Lille, France
| | - MC Baranzelli
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, United Kingdom; Institut Curie, Paris, France; CRB Ferdinand Cabanne, Centre Georges François Leclerc, Dijon, France; Institut Claudius Regaud, Toulouse, France; Centre Jean Perrin, Clermont-Ferrand, France; Centre Oscar Lambret, Lille, France
| | - X Sastre-Garau
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, United Kingdom; Institut Curie, Paris, France; CRB Ferdinand Cabanne, Centre Georges François Leclerc, Dijon, France; Institut Claudius Regaud, Toulouse, France; Centre Jean Perrin, Clermont-Ferrand, France; Centre Oscar Lambret, Lille, France
| | - CJ Lord
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, United Kingdom; Institut Curie, Paris, France; CRB Ferdinand Cabanne, Centre Georges François Leclerc, Dijon, France; Institut Claudius Regaud, Toulouse, France; Centre Jean Perrin, Clermont-Ferrand, France; Centre Oscar Lambret, Lille, France
| | - M Zvelebil
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, United Kingdom; Institut Curie, Paris, France; CRB Ferdinand Cabanne, Centre Georges François Leclerc, Dijon, France; Institut Claudius Regaud, Toulouse, France; Centre Jean Perrin, Clermont-Ferrand, France; Centre Oscar Lambret, Lille, France
| | - C Mitsopoulos
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, United Kingdom; Institut Curie, Paris, France; CRB Ferdinand Cabanne, Centre Georges François Leclerc, Dijon, France; Institut Claudius Regaud, Toulouse, France; Centre Jean Perrin, Clermont-Ferrand, France; Centre Oscar Lambret, Lille, France
| | - A Ashworth
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, United Kingdom; Institut Curie, Paris, France; CRB Ferdinand Cabanne, Centre Georges François Leclerc, Dijon, France; Institut Claudius Regaud, Toulouse, France; Centre Jean Perrin, Clermont-Ferrand, France; Centre Oscar Lambret, Lille, France
| | - R Natrajan
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, United Kingdom; Institut Curie, Paris, France; CRB Ferdinand Cabanne, Centre Georges François Leclerc, Dijon, France; Institut Claudius Regaud, Toulouse, France; Centre Jean Perrin, Clermont-Ferrand, France; Centre Oscar Lambret, Lille, France
| | - B Weigelt
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, United Kingdom; Institut Curie, Paris, France; CRB Ferdinand Cabanne, Centre Georges François Leclerc, Dijon, France; Institut Claudius Regaud, Toulouse, France; Centre Jean Perrin, Clermont-Ferrand, France; Centre Oscar Lambret, Lille, France
| | - O Delattre
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, United Kingdom; Institut Curie, Paris, France; CRB Ferdinand Cabanne, Centre Georges François Leclerc, Dijon, France; Institut Claudius Regaud, Toulouse, France; Centre Jean Perrin, Clermont-Ferrand, France; Centre Oscar Lambret, Lille, France
| | - P Cottu
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, United Kingdom; Institut Curie, Paris, France; CRB Ferdinand Cabanne, Centre Georges François Leclerc, Dijon, France; Institut Claudius Regaud, Toulouse, France; Centre Jean Perrin, Clermont-Ferrand, France; Centre Oscar Lambret, Lille, France
| | - JS Reis-Filho
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, United Kingdom; Institut Curie, Paris, France; CRB Ferdinand Cabanne, Centre Georges François Leclerc, Dijon, France; Institut Claudius Regaud, Toulouse, France; Centre Jean Perrin, Clermont-Ferrand, France; Centre Oscar Lambret, Lille, France
| | - A Vincent-Salomon
- The Breakthrough Breast Cancer Research Centre, The Institute of Cancer Research, London, United Kingdom; Institut Curie, Paris, France; CRB Ferdinand Cabanne, Centre Georges François Leclerc, Dijon, France; Institut Claudius Regaud, Toulouse, France; Centre Jean Perrin, Clermont-Ferrand, France; Centre Oscar Lambret, Lille, France
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Gauthier A, Kanis JA, Jiang Y, Dreinhöfer K, Martin M, Compston J, Borgström F, Cooper C, McCloskey E. Burden of postmenopausal osteoporosis in Germany: estimations from a disease model. Arch Osteoporos 2012. [PMID: 23196864 DOI: 10.1007/s11657-012-0099-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
UNLABELLED This article describes the adaptation of a model assessing the incidence of osteoporotic fractures and prevalence of postmenopausal osteoporosis (PMO) in Germany. PURPOSE The purpose of this paper is to estimate the epidemiological burden of PMO in Germany from 2010 to 2020. METHODS For each year of the study, the 'incident cohort' (women experiencing a first osteoporotic fracture) was identified and run through a Markov model using 1-year cycles until 2020. Health states were based on the number of fractures (1, 2 or ≥3) and deaths. Although the fracture site was not explicitly accounted for in the model structure, the site (hip, vertebral, non-hip non-vertebral) was tracked for each health state. Transition probabilities reflected the site-specific risk of death and of subsequent fractures. Model inputs included population size and life tables from 1970 to 2020, incidence of fracture and BMD by age in the general population (mean and standard deviation). RESULTS In 2010, the number of osteoporotic fractures was estimated at 349,560 in women aged 50 years or more, including 80,177 hip and 48,550 vertebral fractures. By 2020, the population is expected to grow by 13.1 %. As a result, the number of fractures is predicted to increase by 15.2 %. The improvement in life expectancy is predicted to lead to a relatively smaller increase in the number of deaths attributable to fractures (+12.8 %), but also to an increase in the prevalence of women with multiple prior fractures (+25.5 %). CONCLUSION The PMO disease model, first developed for Sweden, was adapted to Germany. Due to the ageing of the population, the number of osteoporotic fractures is expected to increase markedly by +15.2 % by 2020.
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Cawston H, Maravic M, Fardellone P, Gauthier A, Kanis JA, Compston J, Borgström F, Cooper C, McCloskey E. Epidemiological burden of postmenopausal osteoporosis in France from 2010 to 2020: estimations from a disease model. Arch Osteoporos 2012; 7:237-46. [PMID: 23060309 DOI: 10.1007/s11657-012-0102-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2011] [Accepted: 08/24/2012] [Indexed: 02/03/2023]
Abstract
UNLABELLED This article estimates the present and future burden of postmenopausal osteoporosis in France in women aged 50 years and over. METHODS We adapted an existing model developed for Sweden to France. For each year of the study from 1970 to 2020, the 'incident cohort' (women experiencing a first osteoporotic fracture) was identified and run through a Markov model using annual cycles. Health states were based on the number of fractures (hip, vertebral, non-hip non-vertebral) and deaths. Transition probabilities reflected fracture site-specific risks of subsequent fractures and of death. Country-specific model inputs included population size and life tables from 1970 to 2020 and incidence of hip fracture. RESULTS The model estimated that the number of postmenopausal osteoporotic women was expected to increase from 3.0 million to 3.4 million between 2010 and 2020 (+15.3 %). Assuming that the incidence of fracture by age group does not change over time, the model predicted that the overall number of osteoporotic fractures would increase from 204,234 fractures in 2010 to 241,261 in 2020 (+18.1 %), hip (20.3 %), vertebral (19.0 %) and non-hip non-vertebral fractures (17.0 %). CONCLUSION The aging of the population is expected to drive a marked increase in the prevalence of osteoporosis and in the number of osteoporotic fractures. These data may assist future planning for appropriate heath care provision.
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Davenne D, Lericollais R, Sagaspe P, Taillard J, Gauthier A, Espié S, Philip P. Reliability of simulator driving tool for evaluation of sleepiness, fatigue and driving performance. Accid Anal Prev 2012; 45:677-682. [PMID: 22269557 DOI: 10.1016/j.aap.2011.09.046] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2011] [Accepted: 09/26/2011] [Indexed: 05/31/2023]
Abstract
STUDY OBJECTIVE To compare the impact of extended wakefulness (i.e., sleepiness) and prolonged driving (i.e., fatigue) at the wheel in simulated versus real-life driving conditions. DESIGN Participants drove on an INRETS-MSIS SIM2 simulator in a research laboratory or an open French highway during 3 nocturnal driving sessions. A dose-response design of duration of nocturnal driving was used: a 2 h short driving session (3-5 AM), a 4 h intermediate driving session (1-5 AM) and an 8 h long driving session (9 PM-5 AM). PARTICIPANTS Two groups of healthy male drivers (20 for simulated driving and 14 drivers for real driving; mean age±SD=22.3±1.6 years), free of sleep disorders. MEASUREMENTS Number of inappropriate line crossings, self-rated fatigue and sleepiness were recorded in the last hour of driving sessions to control the effects of prior waking time and time of day. RESULTS Compared to the daytime reference session, both simulated and real driving performance were affected by a short nocturnal driving session (P<.05 and P<.001, respectively). Extension of nocturnal driving duration affected simulated performance nonlinearly and more severely than that of real driving (P<.001). Compared to the daytime reference session, short nocturnal simulated and real driving sessions increased self-perceived fatigue and sleepiness. Real and simulated driving conditions had an identical impact on fatigue and sleepiness during extended periods of nocturnal driving. CONCLUSIONS In healthy subjects, the INRETS-MSIS SIM2 simulator appropriately measures driving impairment in terms of inappropriate line crossings related to extended wakefulness but has limitations to measure the impact of extended driving on drivers' performance.
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Affiliation(s)
- D Davenne
- INSERM, ER I27, F-14000 Caen, France.
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Gauthier A, Graffe A, Beucher AB, Pajot O, Milea D, Lavigne C. Syphilis oculaire : à propos de deux cas. Rev Med Interne 2011; 32:758-61. [DOI: 10.1016/j.revmed.2011.10.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2010] [Revised: 06/29/2011] [Accepted: 10/05/2011] [Indexed: 10/15/2022]
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Gauthier A, Kanis JA, Martin M, Compston J, Borgström F, Cooper C, McCloskey E. Development and validation of a disease model for postmenopausal osteoporosis. Osteoporos Int 2011; 22:771-80. [PMID: 20700580 DOI: 10.1007/s00198-010-1358-3] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2010] [Accepted: 06/14/2010] [Indexed: 10/19/2022]
Abstract
UNLABELLED This article describes the development of a model for postmenopausal osteoporosis (PMO) based on Swedish data that is easily adaptable to other countries. INTRODUCTION The aims of the study were to develop and validate a model to describe the current/future burden of PMO in different national settings. METHODS For validation purposes, the model was developed using Swedish data and provides estimates from 1990. For each year of the study, the "incident cohort" (women experiencing a first osteoporotic fracture) was identified and run through a Markov model using 1-year cycles until 2020. Health states were based on the number of fractures and death. Fracture by site (hip, vertebral, and non-hip non-vertebral) was tracked for each health state. Transition probabilities reflected site-specific risk of death and subsequent fractures. Bone mineral density (BMD) was included as a model output; model inputs included population size and life tables from 1970 to 2020, incidence of fracture, relative risk of subsequent fractures based on prior fracture, relative risk of death following a fracture by site, and BMD by age (mean and standard deviation). RESULTS Model predictions averaged across age groups estimated the incidence of hip, vertebral, and other osteoporotic fractures within a 5% margin of error versus published data. In Sweden, the number of osteoporotic fractures is expected to rise by 11.5% between 2009 and 2020, with a shift towards more vertebral fractures and multiple fractures. CONCLUSION The current PMO disease model is easily adaptable to other countries, providing a consistent measure of present and future burden of PMO in different settings.
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Lericollais R, Gauthier A, Bessot N, Davenne D. Diurnal evolution of cycling biomechanical parameters during a 60-s Wingate test. Scand J Med Sci Sports 2010; 21:e106-14. [DOI: 10.1111/j.1600-0838.2010.01172.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [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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Conlan L, Gauthier A, Leek C. Eye movement patterns during object recognition are modulated by perceptual expertise and level of stimulus classification. J Vis 2010. [DOI: 10.1167/10.7.962] [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: 11/24/2022] Open
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Abstract
Recently, it was observed that the freely chosen pedal rate of elite cyclists was significantly lower at 06:00 than at 18:00 h, and that ankle kinematics during cycling exhibits diurnal variation. The modification of the pedaling technique and pedal rate observed throughout the day could be brought about to limit the effect of diurnal variation on physiological variables. Imposing a pedal rate should limit the subject's possibility of adaptation and clarify the influence of time of day on physiological variables. The purpose of this study was to determine whether diurnal variation in cardiorespiratory variables depends on pedal rate. Ten male cyclists performed a submaximal 15 min exercise on a cycle ergometer (50% Wmax). Five test sessions were performed at 06:00, 10:00, 14:00, 18:00, and 22:00 h. The exercise bout was divided into three equivalent 5 min periods during which different pedal rates were imposed (70 rev x min(-1), 90 rev x min(-1) and 120 rev x min(-1)). No significant diurnal variation was observed in heart rate and oxygen consumption, whatever the pedal rate. A significant diurnal variation was observed in minute ventilation (p=0.01). In addition, the amplitude of the diurnal variation in minute ventilation depended on pedal rate: the higher the pedal rate, the greater the amplitude of its diurnal variation (p=0.03). The increase of minute ventilation throughout the day is mainly due to variation in breath frequency (p=0.01)--the diurnal variation of tidal volume (all pedal rate conditions taken together) being non-significant--but the effect of pedal rate x time of day interaction on minute ventilation specific to the higher pedal rate conditions (p=0.03) can only be explained by the increase of tidal volume throughout the day. Even though an influence of pedal rate on diurnal rhythms in overall physiological variables was not also evidenced, high pedal rate should have been imposed when diurnal variations of physiological variables in cycling were studied.
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Affiliation(s)
- N Bessot
- Centre de Recherches en Activités Physiques et Sportives (CRAPS UPRES EA2131), UFR Sciences et Techniques des Activités Physiques et Sportives, Caen Cedex, France
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Nicolas A, Gauthier A, Bessot N, Moussay S, Davenne D. Time‐of‐Day Effects on Myoelectric and Mechanical Properties of Muscle During Maximal and Prolonged Isokinetic Exercise. Chronobiol Int 2009; 22:997-1011. [PMID: 16393704 DOI: 10.1080/07420520500397892] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The aim of this study was to examine the time-of-day (TOD) effects in myoelectric and mechanical properties of muscle during a maximal and prolonged isokinetic exercise. Twelve male subjects were asked to perform 50 maximal voluntary contractions (MVC) of the knee extensor muscles at a constant angular velocity of 2.09 rad . sec(-1), at 06 : 00 and 18 : 00 h. Torque and electromyographic (EMG) parameters were recorded for each contraction, and the ratio between these values was calculated to evaluate variations of the neuromuscular efficiency (NME) with fatigue and with TOD. The results indicated that maximal torque values (T(45)Max) was significantly higher (7.73%) in the evening than in the morning (p<0.003). The diurnal variation in torque decrease was used to define two phases. During the first phase (1st to the 26th repetition), torque values decreased fast and values were higher in the evening than in the morning, and during the second phase (27th to the 50th repetition), torque decreased slightly and reached a floor value that appeared constant with TOD. The EMG parameters (Root Mean Square; RMS) were modified with fatigue, but were not TOD dependent. The NME decrease-significantly with fatigue, showing that peripheral factors were mainly involved in the torque decrease. Furthermore, NME decrease was greater at 18 : 00 than at 06 : 00 h for the vastus medialis (p<0.05) and the vastus lateralis muscles (p<0.002), and this occurred during the first fatigue phase of the exercise. In conclusion, the diurnal variation of the muscle fatigue observed during a maximal and prolonged isokinetic exercise seems to reflect on the muscle, with a greater contractile capacity but a higher fatigability in the evening compared to the morning.
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Affiliation(s)
- A Nicolas
- Centre de Recherches en Activités Physiques et Sportives, Université de Caen-Basse Normandie, Caen Cedex, France.
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Abstract
Physiological and biomechanical constraints as well as their fluctuations throughout the day must be considered when studying determinant factors in the preferred pedaling rate of elite cyclists. The aim of this study was to monitor the diurnal variation of spontaneous pedaling rate and movement kinematics over the crank cycle. Twelve male competitive cyclists performed a submaximal exercise on a cycle ergometer for 15 min at 50% of their W(max). Two test sessions were performed at 06:00 and 18:00 h on two separate days to assess diurnal variation in the study variables. For each test session, the exercise bout was divided into three equivalent 5-min periods during which subjects were requested to use different pedal rates (spontaneous cadence, 70 and 90 rev min(-1)). Pedal rate and kinematics data (instantaneous pedal velocity and angle of the ankle) were collected. The results show a higher spontaneous pedal rate in the late afternoon than in the early morning (p < 0.001). For a given pedal rate condition, there was a less variation in pedal velocity during a crank cycle in the morning than in the late afternoon. Moreover, diurnal variations were observed in ankle mobility across the crank cycle, the mean plantar flexion observed throughout the crank cycle being greater in the 18:00 h test session (p < 0.001). These results suggest that muscular activation patterns during a cyclical movement could be under the influence of circadian fluctuations.
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Affiliation(s)
- S Moussay
- Centre de Recherches en Activités Physiques et Sportives (CRAPS UPRES EA2131), UFR Sciences et Techniques des Activités Physiques et Sportives, Université de Caen Basse-Normandie, Caen, France
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Attucci S, Gauthier A, Brea D, Dubois A, Gauthier F. Neutrophil Extracellular Traps impair the inhibition of elastase, protease 3 and cathepsin G in neutrophil suspensions from CF patients. J Cyst Fibros 2009. [DOI: 10.1016/s1569-1993(09)60204-6] [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: 10/20/2022]
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Nicolas A, Gauthier A, Bessot N, Moussay S, Thibault G, Sesboüé B, Davenne D. Effect of time-of-day on neuromuscular properties of knee extensors after a short exhaustive cycling exercise. ISOKINET EXERC SCI 2008. [DOI: 10.3233/ies-2008-0293] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- A. Nicolas
- Centre de Recherches en Activités Physiques et Sportives (CRAPS), UPRES EA 2131, Université de Cane, France
| | - A. Gauthier
- Centre de Recherches en Activités Physiques et Sportives (CRAPS), UPRES EA 2131, Université de Cane, France
| | - N. Bessot
- Centre de Recherches en Activités Physiques et Sportives (CRAPS), UPRES EA 2131, Université de Cane, France
| | - S. Moussay
- Centre de Recherches en Activités Physiques et Sportives (CRAPS), UPRES EA 2131, Université de Cane, France
| | - G. Thibault
- Département de Kinésiologie, Université de Montréal, Montréal, Canada
| | - B. Sesboüé
- Centre de Recherches en Activités Physiques et Sportives (CRAPS), UPRES EA 2131, Université de Cane, France
| | - D. Davenne
- Centre de Recherches en Activités Physiques et Sportives (CRAPS), UPRES EA 2131, Université de Cane, France
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Seignez N, Gauthier A, Bulteel D, Buatier M, Recourt P, Damidot D, Potdevin JL. Effect of Pb-rich and Fe-rich entities during alteration of a partially vitrified metallurgical waste. J Hazard Mater 2007; 149:418-31. [PMID: 17499917 DOI: 10.1016/j.jhazmat.2007.04.007] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2007] [Revised: 03/26/2007] [Accepted: 04/02/2007] [Indexed: 05/15/2023]
Abstract
Lead blast furnace (LBF) slags are mainly composed of an iron-silica-lime glass matrix and minor phases such as solid solutions of Mg-Cr-rich and Fe-Zn-rich spinel crystals, crystallized iron oxides such as wüstite and metallic lead droplets. In this study, results from Raman spectroscopy, transmission and scanning electron microscopy allow to argue that widely submicron iron-rich phases are very common in the glass matrix and could have an effect on the general alteration pattern of the glass matrix during leaching experiments. Open flow tests also point out close relationships between glass alteration ability and the presence of large lead droplets. According to numerous papers on nuclear glass leaching, acidic pH encountered in such open flow tests lead to preferential releases of the main alkali-earth metal composing the glass. Altered glass is mainly characterized by relative enrichments in iron. It is induced by high calcium or calcium-silicon depletions. Surprisingly, such type of alteration layer is not uniformly spread on the slag surface. In this work, it is also assumed that previous chemical analyses of the LBF glass matrix having micrometric resolution cannot give a realistic glass composition. A short discussion is also proposed about which characterization techniques can be used to correctly identify submicron iron-rich entities and evaluate their proportions and composition.
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Affiliation(s)
- N Seignez
- Université de Lille 1, UMR CNRS 8110, Processus et Bilans des Domaines Sédimentaires, Bâtiment SN5, 59655 Villeneuve d'Ascq Cedex, France
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Gauthier A. Évaluation de l'effet médecin sur le comportement de prescription. Rev Epidemiol Sante Publique 2007. [DOI: 10.1016/j.respe.2007.07.046] [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: 10/14/2022] Open
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Affiliation(s)
- R. Julienne
- Centre de Recherches en Activités Physiques et Sportives (CRAPS UPRES EA2131), UFR Sciences et Techniques des Activités Physiques et Sportives, Université de Caen Basse-Normandie, Caen, France
| | - A. Gauthier
- Centre de Recherches en Activités Physiques et Sportives (CRAPS UPRES EA2131), UFR Sciences et Techniques des Activités Physiques et Sportives, Université de Caen Basse-Normandie, Caen, France
| | - S. Moussay
- Centre de Recherches en Activités Physiques et Sportives (CRAPS UPRES EA2131), UFR Sciences et Techniques des Activités Physiques et Sportives, Université de Caen Basse-Normandie, Caen, France
| | - D. Davenne
- Centre de Recherches en Activités Physiques et Sportives (CRAPS UPRES EA2131), UFR Sciences et Techniques des Activités Physiques et Sportives, Université de Caen Basse-Normandie, Caen, France
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Nicolas A, Gauthier A, Michaut A, Davenne D. Effect of circadian rhythm of neuromuscular properties on muscle fatigue during concentric and eccentric isokinetic actions. ISOKINET EXERC SCI 2007. [DOI: 10.3233/ies-2007-0258] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- A. Nicolas
- Centre de Recherches en Activités Physiques et Sportives, CRAPS, UPRES EA 2131, Université de Caen-Basse Normandie, UFR STAPS, 2 Boulevard du Maréchal Juin, 14032 Caen Cedex, France
| | - A. Gauthier
- Centre de Recherches en Activités Physiques et Sportives, CRAPS, UPRES EA 2131, Université de Caen-Basse Normandie, UFR STAPS, 2 Boulevard du Maréchal Juin, 14032 Caen Cedex, France
| | - A. Michaut
- Laboratoire de biomécanique et physiologie, Institut national des sports et de l'éducation physique, INSEP, 11 avenue du Tremblay, 75012 Paris, France
| | - D. Davenne
- Centre de Recherches en Activités Physiques et Sportives, CRAPS, UPRES EA 2131, Université de Caen-Basse Normandie, UFR STAPS, 2 Boulevard du Maréchal Juin, 14032 Caen Cedex, France
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Bessot N, Moussay S, Clarys JP, Gauthier A, Sesboüé B, Davenne D. The influence of circadian rhythm on muscle activity and efficient force production during cycling at different pedal rates. J Electromyogr Kinesiol 2007; 17:176-83. [PMID: 16563800 DOI: 10.1016/j.jelekin.2006.01.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2005] [Revised: 01/17/2006] [Accepted: 01/31/2006] [Indexed: 10/24/2022] Open
Abstract
The aim of this study was to examine the pedal rate and chronobiological impacts on muscle activity pattern and propulsive force production during cycling. Ten male competitive cyclists performed at 06:00 and 18:00 h a submaximal exercise on a cycle ergometer at a power output which elicited 50% of their respective W(max). The exercise was divided into 4 periods lasting 5 min each during which subjects were requested to use different pedal rates (free pedal rate, 70, 90 and 120 rev min-1) in random order. The study demonstrated that, under high pedal rate, several muscles exhibited a phase advance of activity. These modifications of temporal organization of muscle activity were not sufficient to keep an identical propulsive torque pattern. Time to peak torque was delayed when pedal rate increased. The effects of circadian fluctuation on electromyographic activity were limited to a later M. rectus femoris burst end and shorter activity duration for M. tibialis anterior at 06:00 h. From the results of this study, it seems that the influence of pedal rate in the range of torque fluctuation would depend on time-of-day of testing. The decrease in torque fluctuation due to pedal rate increase is reinforced when testing in the early morning. Taking this specific variable into consideration, the chronobiological effect increases the impact of pedal rate variations.
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Affiliation(s)
- N Bessot
- Centre de Recherches en Activités Physiques et Sportives (CRAPS UPRES EA2131), UFR Sciences et Techniques des Activités Physiques et Sportives, Université de Caen Basse-Normandie, 2 Boulevard du Marechal Juin, 14032 Caen Cedex, France
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