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Wazne M, Mermillod-Blondin F, Vallier M, Krause S, Barthélémy N, Simon L. Optimization of glass separating funnels to facilitate microplastic extraction from sediments. MethodsX 2024; 12:102540. [PMID: 38268517 PMCID: PMC10805656 DOI: 10.1016/j.mex.2023.102540] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Accepted: 12/26/2023] [Indexed: 01/26/2024] Open
Abstract
Recent studies on the distribution of microplastics in aquatic sediments have deployed different methods and devices for density separation of microplastics from sediments. However, instrument specific limitations have been noted, including their high cost, difficulty in handling, or/and the potential for elevated contamination risk due to their plastic composition. This study improves existing sediment microplastic separation techniques by modifying the commonly used conical shape glass separating funnels. The modification consists in connecting a silicone tube at the base of the funnel, whose opening and closure was manually controlled by a Mohr clamp. This adjustment made to the funnels have effectively mitigated critical clogging problems frequently encountered in density separation units. An experiment was conducted using sand-based sediment spiked with polyamide fragments to validate this method modification. Following a complete extraction protocol with the modification of separating funnels, the microplastic extraction efficiency from sediments was high with a 90% recovery rate. Based on these promising results, future studies should consider naturally diverse substrates, as recovery efficiency may be sediment-dependent. Two key adjustments to the glass separation funnels:•Removal of stopcocks•Use of silicone tubes and Mohr clamps to control sediment release.
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Affiliation(s)
- Mohammad Wazne
- CNRS, ENTPE, Université Claude Bernard Lyon 1, UMR 5023 LEHNA, Villeurbanne F 69622, France
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | | | - Manon Vallier
- CNRS, ENTPE, Université Claude Bernard Lyon 1, UMR 5023 LEHNA, Villeurbanne F 69622, France
| | - Stefan Krause
- CNRS, ENTPE, Université Claude Bernard Lyon 1, UMR 5023 LEHNA, Villeurbanne F 69622, France
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | - Nans Barthélémy
- CNRS, ENTPE, Université Claude Bernard Lyon 1, UMR 5023 LEHNA, Villeurbanne F 69622, France
| | - Laurent Simon
- CNRS, ENTPE, Université Claude Bernard Lyon 1, UMR 5023 LEHNA, Villeurbanne F 69622, France
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2
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Malesys V, Andrieux-Ledier A, Lavenus P, Simon L. Building a cm 2scale CVD graphene-based gas sensor: modelling the kinetic with a three-site adsorption/desorption Langmuir model. Nanotechnology 2024; 35:285501. [PMID: 38579693 DOI: 10.1088/1361-6528/ad3b02] [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] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Accepted: 04/05/2024] [Indexed: 04/07/2024]
Abstract
In this article, we aim to develop and study a highly sensitive and selective cm2scale graphene-based gas sensor. We present the technology used to fabricate sensors which integrate monolayer chemical vapour deposition graphene: photolithography and transfer of layers. Characterization techniques (optical microscopy, AFM, micro-Raman spectroscopy, transport electrical measurements) ensure a diagnosis of graphene ribbons and allow good reproducibility of technological processes. We present the results of gas characterizations after a 200 ppm NO2exposure. We propose a novel approach for the modelling of the sensor response with a three-site adsorption/desorption Langmuir model. This innovative way of modelling the sensor response should provide a better understanding of the sensor's kinetic and help to overcome the long response time observed with graphene gas sensors.
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Affiliation(s)
- V Malesys
- Institut de Sciences des Matériaux de Mulhouse, CNRS-UMR 7361, Université de Haute Alsace, Mulhouse, France
| | | | - P Lavenus
- DPHY, ONERA, Université Paris Saclay, Châtillon, France
| | - L Simon
- Institut de Sciences des Matériaux de Mulhouse, CNRS-UMR 7361, Université de Haute Alsace, Mulhouse, France
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3
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Mahout M, Carlson RP, Simon L, Peres S. Logic programming-based Minimal Cut Sets reveal consortium-level therapeutic targets for chronic wound infections. NPJ Syst Biol Appl 2024; 10:34. [PMID: 38565568 PMCID: PMC10987626 DOI: 10.1038/s41540-024-00360-6] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Accepted: 03/13/2024] [Indexed: 04/04/2024] Open
Abstract
Minimal Cut Sets (MCSs) identify sets of reactions which, when removed from a metabolic network, disable certain cellular functions. The traditional search for MCSs within genome-scale metabolic models (GSMMs) targets cellular growth, identifies reaction sets resulting in a lethal phenotype if disrupted, and retrieves a list of corresponding gene, mRNA, or enzyme targets. Using the dual link between MCSs and Elementary Flux Modes (EFMs), our logic programming-based tool aspefm was able to compute MCSs of any size from GSMMs in acceptable run times. The tool demonstrated better performance when computing large-sized MCSs than the mixed-integer linear programming methods. We applied the new MCSs methodology to a medically-relevant consortium model of two cross-feeding bacteria, Staphylococcus aureus and Pseudomonas aeruginosa. aspefm constraints were used to bias the computation of MCSs toward exchanged metabolites that could complement lethal phenotypes in individual species. We found that interspecies metabolite exchanges could play an essential role in rescuing single-species growth, for instance inosine could complement lethal reaction knock-outs in the purine synthesis, glycolysis, and pentose phosphate pathways of both bacteria. Finally, MCSs were used to derive a list of promising enzyme targets for consortium-level therapeutic applications that cannot be circumvented via interspecies metabolite exchange.
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Affiliation(s)
- Maxime Mahout
- Université Paris-Saclay, CNRS, Laboratoire Interdisciplinaire des Sciences du Numérique, 91405, Orsay, France
| | - Ross P Carlson
- Department of Chemical and Biological Engineering, Center for Biofilm Engineering, Microbiology and Immunology, Montana State University, Bozeman, MT, 59717, USA
| | - Laurent Simon
- Bordeaux-INP, Université Bordeaux, LaBRI, 33405, Talence Cedex, France
| | - Sabine Peres
- UMR CNRS 5558, Laboratoire de Biométrie et de Biologie Évolutive, Université Claude Bernard Lyon 1, 69100, Villeurbanne, France.
- INRIA Lyon Centre, 69100, Villeurbanne, France.
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4
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Douce P, Simon L, Colas F, Mermillod-Blondin F, Renault D, Sulmon C, Eymar-Dauphin P, Dubreucque R, Bittebiere AK. Warming drives feedback between plant phenotypes and ecosystem functioning in sub-Antarctic ponds. Sci Total Environ 2024; 914:169504. [PMID: 38145689 DOI: 10.1016/j.scitotenv.2023.169504] [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: 09/11/2023] [Revised: 12/14/2023] [Accepted: 12/17/2023] [Indexed: 12/27/2023]
Abstract
Ample evidence indicates that warming affects individuals in plant communities, ultimately threatening biodiversity. Individual plants in communities are also exposed to plant-plant interaction that may affect their performance. However, trait responses to these two constraints have usually been studied separately, while they may influence processes at the ecosystem level. In turn, these ecological modifications may impact the phenotypes of plants through nutrient availability and uptake. We developed an experimental approach based on the macrophyte communities in the ponds of the sub-Antarctic Iles Kerguelen. Individuals of the species Limosella australis were grown under different temperature × plant-plant interaction treatments to assess their trait responses and create litters with different characteristics. The litters were then decomposed in the presence of individual plants at different temperatures to examine effects on ecosystem functioning and potential feedback affecting plant trait values. Leaf resource-acquisition- and -conservation-related traits were altered in the context of temperature × plant-plant interaction. At 13 °C, SLA and leaf C:N were higher under interspecific and intraspecific interactions than without interaction, whereas at 23 °C, these traits increased under intraspecific interaction only. These effects only slightly improved the individual performance, suggesting that plant-plant interaction is an additional selective pressure on individuals in the context of climate warming. The decay rate of litter increased with the Leaf Carbon Content at 13 °C and 18 °C, but decreased at 23 °C. The highest decay rate was recorded at 18 °C. Besides, we observed evidence of positive feedback of the decay rate alone, and in interaction with the temperature, respectively on the leaf C:N and Leaf Dry Matter Content, suggesting that variations in ecological processes affect plant phenotypes. Our findings demonstrate that warming can directly and indirectly affect the evolutionary and ecological processes occurring in aquatic ecosystems through plants.
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Affiliation(s)
- Pauline Douce
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR5023 LEHNA, F-69622 Villeurbanne, France.
| | - Laurent Simon
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR5023 LEHNA, F-69622 Villeurbanne, France.
| | - Fanny Colas
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR5023 LEHNA, F-69622 Villeurbanne, France.
| | - Florian Mermillod-Blondin
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR5023 LEHNA, F-69622 Villeurbanne, France.
| | - David Renault
- Univ Rennes, CNRS, ECOBIO [(Ecosystèmes, biodiversité, évolution)], UMR 6553, F 35000 Rennes, France; Institut Universitaire de France, 1 Rue Descartes, 75231 Paris cedex 05, France.
| | - Cécile Sulmon
- Univ Rennes, CNRS, ECOBIO [(Ecosystèmes, biodiversité, évolution)], UMR 6553, F 35000 Rennes, France.
| | - Pauline Eymar-Dauphin
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR5023 LEHNA, F-69622 Villeurbanne, France.
| | - Roman Dubreucque
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR5023 LEHNA, F-69622 Villeurbanne, France.
| | - Anne-Kristel Bittebiere
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR5023 LEHNA, F-69622 Villeurbanne, France.
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Pagès G, Longo R, Simon L, Melon M. Online adaptive identification of multichannel systems for audio applications. J Acoust Soc Am 2024; 155:229-240. [PMID: 38189469 DOI: 10.1121/10.0024149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Accepted: 12/08/2023] [Indexed: 01/09/2024]
Abstract
Impulse responses (IRs) estimation of multi-input acoustic systems is a prerequisite for many audio applications. In this paper, an adaptive identification problem based on the Autostep algorithm is extended to the simultaneous estimation of room IRs for multiple input single output linear time invariant systems without any a priori information. To do so, the proposed algorithm is initially evaluated in a simulated room with several sound sources active at the same time. Finally, an experimental validation is proposed for the cases of a semi-anechoic chamber and an arbitrary room. Special attention is dedicated to the algorithm convergence behavior, considering different meta parameters settings. Results are eventually compared with the other normalized version of the least mean square algorithm.
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Affiliation(s)
- Guilhem Pagès
- Laboratoire d'Acoustique de l'Université du Mans (LAUM), Unité Mixte de Recherche 6613, Institut d'Acoustique-Graduate School (IA-GS), Centre National de la Recherche Scientifique, Le Mans Université, France
| | - Roberto Longo
- Laboratoire d'Acoustique de l'Université du Mans (LAUM), Unité Mixte de Recherche 6613, Institut d'Acoustique-Graduate School (IA-GS), Centre National de la Recherche Scientifique, Le Mans Université, France
| | - Laurent Simon
- Laboratoire d'Acoustique de l'Université du Mans (LAUM), Unité Mixte de Recherche 6613, Institut d'Acoustique-Graduate School (IA-GS), Centre National de la Recherche Scientifique, Le Mans Université, France
| | - Manuel Melon
- Laboratoire d'Acoustique de l'Université du Mans (LAUM), Unité Mixte de Recherche 6613, Institut d'Acoustique-Graduate School (IA-GS), Centre National de la Recherche Scientifique, Le Mans Université, France
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6
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Simon L. Estimation of volatile organic compound exposure concentrations and time to reach a specific dermal absorption using physiologically based pharmacokinetic modeling. J Occup Environ Hyg 2024; 21:1-12. [PMID: 37698510 DOI: 10.1080/15459624.2023.2257774] [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] [Indexed: 09/13/2023]
Abstract
A procedure was proposed to estimate dermal exposures based on a physiologically based pharmacokinetic (PBPK) model developed in rats. The study examined vapor concentrations ranging from 500 to 10,000 ppm for dibromomethane and 2,500 to 40,000 ppm for bromochloromethane. These concentrations were reconstructed based on chemical blood levels measured in 4 hr, with errors varying from 0.0% to 52.0%. The PBPK approach adequately predicted the blood concentrations and helped simulate contaminant transport through the stratum corneum and distribution in the body compartments. The proposed technique made it possible to estimate the skin absorption time (SAT) obtained from acute inhalation toxicity data. An inverse relationship exists between the SAT and exposure concentration. The method can be helpful in toxicology and risk assessment of hazardous volatile organic compounds.
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Affiliation(s)
- Laurent Simon
- Otto H. York Department and Chemical and Materials Engineering, New Jersey Institute of Technology, Newark, New Jersey
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Martin JE, Tacail T, Simon L, Hassler A, Télouk P, Balter V. Inferring odontocete life history traits in dentine using a multiproxy approach (δ 15 N, δ 44/42 Ca and trace elements). Rapid Commun Mass Spectrom 2023; 37:e9612. [PMID: 37698152 DOI: 10.1002/rcm.9612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 07/11/2023] [Accepted: 07/12/2023] [Indexed: 09/13/2023]
Abstract
RATIONALE Understanding the interactions between marine mammals and their environment is critical for ecological and conservation purposes. Odontocetes offer a continuous record of their life history from birth as recorded in annual increments of their tooth dentine. Because dentine is not remodeled and contains collagen, nitrogen stable isotope compositions (δ15 N) reflect nursing and weaning events, life history traits that would otherwise be impossible to retrieve in such elusive marine animals. Yet, capturing the magnitude and temporal changes in these events is constrained by tooth size and sampling resolution. Moreover, historical and fossil specimens undergo collagen decay, hence the need to develop the measurements of other proxies. METHODS Here, we present a multiproxy approach to investigate the use of Ca isotope compositions (δ44/42 Ca) in relation to δ15 N and laser ablation profiles for different trace metal (Ba, Mg, Sr, Zn) concentrations across the dentine of a single individual of the common bottlenose dolphin Tursiops truncatus. RESULTS To help interpret the dentine data, we provide milk elemental compositions and δ44/42 Ca values for two odontocete individuals. We discuss the observed changes in δ44/42 Ca across the dentine as potential markers of birth, weaning interval, incidental ingestion of seawater, trophic level and physiology. Incidental ingestion of seawater during nursing induces a positive offset in δ44/42 Ca values recorded in the early formed dentine. CONCLUSIONS Life history parameters of individual marine mammals are extremely difficult to retrieve due to limitations in observing specimens in the wild and the methodology presented here offers new ecological and paleoecological perspectives.
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Affiliation(s)
- Jeremy E Martin
- Laboratoire de Géologie de Lyon: Terre, Planètes, Environnements, UMR 5276, CNRS, Ecole Normale supérieure de Lyon, Lyon, France
| | - Théo Tacail
- Institute of Geosciences, Johannes Gutenberg University, Mainz, Germany
| | - Laurent Simon
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, Villeurbanne, France
| | - Auguste Hassler
- Department of Archaeology, University of Aberdeen, Aberdeen, UK
- Department of Earth and Environmental Sciences, University of Ottawa, Ottawa, Ontario, Canada
| | - Philippe Télouk
- Laboratoire de Géologie de Lyon: Terre, Planètes, Environnements, UMR 5276, CNRS, Ecole Normale supérieure de Lyon, Lyon, France
| | - Vincent Balter
- Laboratoire de Géologie de Lyon: Terre, Planètes, Environnements, UMR 5276, CNRS, Ecole Normale supérieure de Lyon, Lyon, France
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8
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Őri D, Vass E, Vajsz K, Vincze K, Sztancsik V, Szemán-Nagy A, Simon L. Psychometric validation of the Reported and Intended Behaviour Scale (RIBS) in Hungary with a particular focus on 'Don't know' responses and further scoring recommendations. BMC Public Health 2023; 23:1773. [PMID: 37700224 PMCID: PMC10496190 DOI: 10.1186/s12889-023-16707-3] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 09/05/2023] [Indexed: 09/14/2023] Open
Abstract
AIMS Reported and Intended Behaviour Scale (RIBS) was designed to measure mental health stigma-related behaviors in the general public. We aimed to examine its psychometric properties and validate the scale in a Hungarian non-clinical community sample. The secondary aim of this study was to assess the appropriateness of the current scoring recommendations of 'Don't know' responses being coded as neutral, which had never been investigated before. In addition, we provide an overview of the results of already existing studies on the scale. METHODS Hungarian participants completed the RIBS within this cross-sectional online survey study and were considered non-clinical individuals based on a cut-off point of the Global Severity Index T score of 63 on the Symptom Checklist-90-Revised. Confirmatory factor analysis, reliability measures, and comparative analyses were performed. RESULTS Of the n = 5,701, n = 5,141 participants were included in the analysis. The mean age was 27.8 ± 11.1 years, and 89.2% (n = 4,587) of the sample were female. The unidimensional structure was supported by good model fit indices (RMSEA = 0.031, CFI = 0.999, TLI = 0.996, and WRMR = 0.006). Internal consistency of the RIBS and its test-retest reliability with a 5-month follow-up period were found to be good (Cronbach's alpha = 0.88 and ICC = 0.838). We found statistically significant differences between the total scores when the 'Don't know' responders were excluded from the sample or when they were coded as neutral as recommended by the scale authors (16 (IQR:13-18) vs. 15 (IQR:13-18) p < 0.0001). There were also statistically significant differences between 'Neither agree nor disagree' and 'Don't know' participants in several aspects of lived experiences of mental health problems. CONCLUSIONS The RIBS demonstrated good psychometric properties and can be transferred to the Hungarian context. It will be a valuable tool in assessing stigmatizing behavior and testing the efficacy of antistigma programs. Our results suggest that 'Neither agree nor disagree' and 'Don't know' responses bear different meanings, and coding should account for this.
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Affiliation(s)
- D Őri
- Institute of Behavioural Sciences, Semmelweis University, Nagyvárad Tér 4., 1089, Budapest, Hungary.
- Department of Mental Health, Heim Pál National Pediatric Institute, Budapest, Hungary.
- Department of Psychology, Illinois Institute of Technology, Chicago, USA.
| | - E Vass
- Department of Psychiatry and Psychotherapy, Semmelweis University, Budapest, Hungary
| | - K Vajsz
- Institute of Psychology, Eötvös Loránd University, Budapest, Hungary
- Department of Clinical Psychology, Semmelweis University, Budapest, Hungary
| | - K Vincze
- Institute of Environmental Medicine, Karolinska Institute, Solna, Sweden
| | - V Sztancsik
- Department of Psychiatry, Clinical Center of the University of Debrecen, Debrecen, Hungary
| | - A Szemán-Nagy
- Department of Personality and Clinical Psychology, University of Debrecen, Debrecen, Hungary
| | - L Simon
- Department of Psychiatry and Psychotherapy, Semmelweis University, Budapest, Hungary
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9
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Darréon J, Massabeau C, Geffroy C, Maroun P, Simon L. Surface-guided radiotherapy overview: Technical aspects and clinical applications. Cancer Radiother 2023; 27:504-510. [PMID: 37558608 DOI: 10.1016/j.canrad.2023.07.003] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 07/05/2023] [Accepted: 07/07/2023] [Indexed: 08/11/2023]
Abstract
In radiotherapy, patient positioning has long been ensured by ionizing imaging (kV or MV). Over the past ten years, surface-guided radiotherapy has appeared in radiotherapy departments. It is a continuous three-dimensional acquisition of the surface of the patient, based on the use of several optical cameras. The acquired surface is compared to an expected surface (usually taken from the planning scanner). Operators can constantly appreciate poor position, anatomical deformity or patient shift. Thus, the system allows an aid to the positioning of the patient, possibly without tattooing, but also a follow-up of the patient during the duration of the session. The most obvious contribution of the system concerns the treatment of the breast. In fact, for this location, the bone registration is not ideal and the target is visible in surface-guided radiotherapy. These systems also make it possible to treat in deep inspiration breath hold. But several other locations can benefit from it (pelvis, thorax, etc.).
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Affiliation(s)
- J Darréon
- Medical Physics Department, institut Paoli-Calmettes, Marseille, France.
| | - C Massabeau
- Département de radiothérapie, Oncopole Claudius-Regaud (OCR), institut universitaire du cancer de Toulouse Oncopole (IUCT O), Toulouse, France
| | - C Geffroy
- Centre Eugène-Marquis, Rennes, France
| | - P Maroun
- Institut radiothérapie Sud de l'Oise, Creil, France
| | - L Simon
- Département de radiothérapie, Oncopole Claudius-Regaud (OCR), institut universitaire du cancer de Toulouse Oncopole (IUCT O), Toulouse, France; Inserm, équipe Radopt, CNRS, centre de recherches en cancérologie de Toulouse (CRCT), université Paul-Sabatier Toulouse III, Toulouse, France
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10
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Simon L, De Taddeo M, Coeurvolan A, Colpaert M, Richard J, Devoisselle JM, Morille M, Marcotte N, Bégu S, Lapinte V. Various lipid anchors on amphiphilic polyoxazolines to reach efficient intracellular delivery. Int J Pharm 2023:123103. [PMID: 37277088 DOI: 10.1016/j.ijpharm.2023.123103] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 05/30/2023] [Accepted: 06/01/2023] [Indexed: 06/07/2023]
Abstract
This work aimed at evaluating the potential of amphiphilic polyoxazolines bearing lipid chain called lipopolyoxazolines to reach efficient intracellular delivery. Four lipid chains: linear saturated, linear unsaturated and two branched one of various length were associated to poly(2-methyl-2-oxazoline) block. The evaluation of their physicochemical features and their impact on cell viability and internalization capacity indicated that the linear saturated gathered the highest cell internalization with a good cell viability. Its intracellular delivery capacity was compared to the PEG reference (DSPE-PEG) after being formulated in liposomes and loaded with fluorescent probe. Both POxylated and PEGylated liposomes showed similar characteristics regarding size distribution, drug loading and cell viability. However, their intracellular delivery was dramatically different, with an improved delivery by 30 folds for the POxylated ones. This significantly better performance highlighted the difficulty of PEGylated liposomes to enter the cells by endocytosis, contrary to POxylated liposomes. This study promotes the value of lipopoly(oxazoline) as a lipopoly(ethylene glycol) alternative for effective intracellular delivery and holds great promises for development of nanoformulations for intravenous administration.
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Affiliation(s)
- L Simon
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France
| | - M De Taddeo
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France
| | - A Coeurvolan
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France
| | - M Colpaert
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France
| | - J Richard
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France
| | | | - M Morille
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France
| | - N Marcotte
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France
| | - S Bégu
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France
| | - V Lapinte
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France.
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11
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Alonso L, Pommier T, Simon L, Maucourt F, Doré J, Dubost A, Trân Van V, Minard G, Valiente Moro C, Douady CJ, Moënne‐Loccoz Y. Microbiome analysis in Lascaux Cave in relation to black stain alterations of rock surfaces and collembola. Environ Microbiol Rep 2023; 15:80-91. [PMID: 36424842 PMCID: PMC10103860 DOI: 10.1111/1758-2229.13133] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 10/25/2022] [Indexed: 05/20/2023]
Abstract
Anthropization of Palaeolithic caves open for tourism may favour collembola invasion and result in the formation of black stains attributed to pigmented fungi. However, ecological processes underpinning black stain formation are not fully understood. Here, we tested the hypotheses that black stains from the Apse room of Lascaux Cave display a specific microbiota enriched in pigmented fungi, and that collembola thriving on the stains have the potential to consume and disseminate these black fungi. Metabarcoding showed that the microbiota of black stains and neighbouring unstained parts strongly differed, with in black stains a higher prevalence of Ochroconis and other pigmented fungi and the strong regression of Pseudomonas bacteria (whose isolates inhibited in vitro the growth of pigmented fungi). Isotopic analyses indicated that Folsomia candida collembola thriving on stains could feed on black stain in situ and assimilate the pigmented fungi they were fed with in vitro. They could carry these fungi and disseminate them when tested with complex black stains from Lascaux. This shows that black stain formation is linked to the development of pigmented fungi, which coincides with the elimination of antagonistic pseudomonads, and points towards a key role of F. candida collembola in the dynamics of pigmented fungi.
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Affiliation(s)
- Lise Alonso
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR5557 Ecologie MicrobienneVilleurbanneFrance
| | - Thomas Pommier
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR5557 Ecologie MicrobienneVilleurbanneFrance
| | - Laurent Simon
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR5023 LEHNAVilleurbanneFrance
| | - Flavien Maucourt
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR5557 Ecologie MicrobienneVilleurbanneFrance
| | - Jeanne Doré
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR5557 Ecologie MicrobienneVilleurbanneFrance
| | - Audrey Dubost
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR5557 Ecologie MicrobienneVilleurbanneFrance
| | - Van Trân Van
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR5557 Ecologie MicrobienneVilleurbanneFrance
| | - Guillaume Minard
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR5557 Ecologie MicrobienneVilleurbanneFrance
| | - Claire Valiente Moro
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR5557 Ecologie MicrobienneVilleurbanneFrance
| | - Christophe J. Douady
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR5023 LEHNAVilleurbanneFrance
| | - Yvan Moënne‐Loccoz
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR5557 Ecologie MicrobienneVilleurbanneFrance
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Douce P, Mermillod-Blondin F, Simon L, Dolédec S, Eymar-Dauphin P, Renault D, Sulmon C, Vallier F, Bittebiere AK. Biotic and abiotic drivers of aquatic plant communities in shallow pools and wallows on the sub-Antarctic Iles Kerguelen. Polar Biol 2023. [DOI: 10.1007/s00300-023-03122-y] [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: 04/05/2023]
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13
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Loffler A, Venier AG, Jouzeau A, Péfau M, Dugravot L, Chabaud A, Simon L, Dumartin C. Factors associated with daptomycin consumption in French hospitals between 2019 and 2020: A nationwide surveillance study. Infect Dis Now 2023; 53:104636. [PMID: 36503170 DOI: 10.1016/j.idnow.2022.12.001] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 11/25/2022] [Accepted: 12/02/2022] [Indexed: 12/13/2022]
Abstract
OBJECTIVES This study aimed to investigate factors associated with daptomycin consumption in French healthcare facilities (HCF) between 2019 and 2020. METHODS Antibiotic consumption expressed as number of defined daily doses (DDD) per 1,000 patient-days (PD) and antimicrobial resistance (AMR) expressed as incidence densities per 1,000PD were extracted each year from the nationwide surveillance network run by the SPARES project (Surveillance and Prevention of Antimicrobial RESistance in hospitals), collecting data at ward level among voluntary HCFs using standardized methodology and webtool. All HCF participating both in 2019 and 2020 were included. A multivariable linear regression was fitted. RESULTS Among 622 HCFs, we analyzed daptomycin consumption and AMR data in 1,637 clinical wards. Incidence densities of methicillin-resistant Staphylococcus aureus (MRSA) and methicillin-resistant coagulase-negative staphylococci (MRCNS) were the highest in intensive care unit wards (0.54 and 6.83 respectively in 2020). On the most adjusted model, the year 2020 was correlated with a higher daptomycin consumption (1.53; p = 0.01). A greater number of inpatient beds (0.01; p < 0.001), the presence of orthopedic surgery activity in the HCF (1.66; p < 0.02), MRSA (4.38; p < 0.001) and MRCNS (0.61; p < 0.001) incidence densities were associated with a higher daptomycin use. The final model explained 18% of the observed variance. CONCLUSIONS This study showed that daptomycin consumption was correlated to MRSA and MRCNS incidence densities, to the year 2020 and to non-modifiable HCF-related factors. Prevention of coagulase-negative staphylococci infections should be considered by antimicrobial stewardship teams when daptomycin use is going up in HCF.
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Affiliation(s)
- A Loffler
- CHU Bordeaux GH Pellegrin, Centre d'appui pour la Prévention des Infections Associées aux Soins, Nouvelle-Aquitaine, Bordeaux, France.
| | - A-G Venier
- CHU Bordeaux GH Pellegrin, Centre d'appui pour la Prévention des Infections Associées aux Soins, Nouvelle-Aquitaine, Bordeaux, France
| | - A Jouzeau
- CHRU de Nancy, Centre d'appui pour la Prévention des Infections Associées aux Soins, Grand-Est, Hôpitaux de Brabois, Nancy, France
| | - M Péfau
- CHU Bordeaux GH Pellegrin, Centre d'appui pour la Prévention des Infections Associées aux Soins, Nouvelle-Aquitaine, Bordeaux, France
| | - L Dugravot
- CHRU de Nancy, Centre d'appui pour la Prévention des Infections Associées aux Soins, Grand-Est, Hôpitaux de Brabois, Nancy, France
| | - A Chabaud
- CHU Dupuytren, Centre d'appui pour la Prévention des Infections Associées aux Soins, Nouvelle-Aquitaine, Limoges, France
| | - L Simon
- CHRU de Nancy, Centre d'appui pour la Prévention des Infections Associées aux Soins, Grand-Est, Hôpitaux de Brabois, Nancy, France
| | - C Dumartin
- CHU Bordeaux GH Pellegrin, Centre d'appui pour la Prévention des Infections Associées aux Soins, Nouvelle-Aquitaine, Bordeaux, France; Univ. Bordeaux, INSERM, BPH, AHeaD Team, U1219, Bordeaux, France
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14
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Wazne M, Mermillod-Blondin F, Vallier M, Hervant F, Dumet A, Nel HA, Kukkola A, Krause S, Simon L. Microplastics in Freshwater Sediments Impact the Role of a Main Bioturbator in Ecosystem Functioning. Environ Sci Technol 2023; 57:3042-3052. [PMID: 36790328 DOI: 10.1021/acs.est.2c05662] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
While microplastic transport, fate, and effects have been a focus of studies globally, the consequences of their presence on ecosystem functioning have not received the same attention. With increasing evidence of the accumulation of microplastics at sediment-water interfaces there is a need to assess their impacts on ecosystem engineers, also known as bioturbators, which have direct and indirect effects on ecosystem health. This study investigated the impact of microplastics on the bioturbator Tubifex tubifex alongside any effects on the biogeochemical processes at the sediment-water interface. Bioturbators were exposed to four sediment microplastic concentrations: 0, 700, 7000, and 70000 particles kg-1 sediment dry weight. Though no mortality was present, a significant response to oxidative stress was detected in tubificid worms after exposure to medium microplastic concentration (7000 particles kg-1 sediment dry weight). This was accompanied by a reduction in worm bioturbation activities assessed by their ability to rework sediment and to stimulate exchange water fluxes at the sediment-water interface. Consequently, the contributions of tubificid worms on organic matter mineralization and nutrient fluxes were significantly reduced in the presence of microplastics. This study demonstrated that environmentally realistic microplastic concentrations had an impact on biogeochemical processes at the sediment-water interface by reducing the bioturbation activities of tubificid worms.
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Affiliation(s)
- Mohammad Wazne
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F 69622 Villeurbanne, France
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K
| | - Florian Mermillod-Blondin
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F 69622 Villeurbanne, France
| | - Manon Vallier
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F 69622 Villeurbanne, France
| | - Frédéric Hervant
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F 69622 Villeurbanne, France
| | - Adeline Dumet
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F 69622 Villeurbanne, France
| | - Holly A Nel
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K
- Centre for Environment Fisheries and Aquaculture Science, Pakefield Road, Lowestoft, Suffolk NR33 0HT, U.K
| | - Anna Kukkola
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K
| | - Stefan Krause
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F 69622 Villeurbanne, France
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K
| | - Laurent Simon
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F 69622 Villeurbanne, France
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Luchnikov VA, Saito Y, Delmotte L, Dentzer J, Denys E, Malesys V, Josien L, Simon L, Gree S. Self-Assembly of Soot Nanoparticles on the Surface of Resistively Heated Carbon Microtubes in Near-Hexagonal Arrays of Micropyramids. ACS Nano 2023; 17:1906-1915. [PMID: 36513374 PMCID: PMC9933883 DOI: 10.1021/acsnano.2c04395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 11/23/2022] [Indexed: 06/17/2023]
Abstract
Almost regular hexagonal arrays of microscopic pyramids consisting of soot nanoparticles are formed on the surface of graphitized hollow filaments, which are resistively heated to ∼1800-2400 °C under an Ar atmosphere containing trace amounts of oxygen (∼300 ppm). At higher temperatures (T > 2300 °C, approximately) the soot particles are represented mainly by multishell carbon nano-onions. The height and width of the pyramids are strongly dependent on the temperature of the resistive heating, diminishing from 5 to 10 μm at T ≈ 1800 °C to ∼1 μm at 2300-2400 °C. Quasi-hexagonal arrays of the micropyramids are organized in the convex "craters" on the surface of the microtubes, which grow with the time of the thermal treatment. The pyramids always point normally to the surface of the craters, except at the boundaries between the craters, where the normal direction is not well-defined. The pyramids are soft and can be easily destroyed by touching them but can be hardened by heating them under an oxygen-free atmosphere. The pyramids are observed only on the exterior surface of the microtubes, not on their inner surface. This suggests that the thermophoretic force generated by a strong temperature gradient near the external surface of the tubes may be the cause of the micropyramid formation. Electrostatic charging of the soot nanoparticles due to thermionic emission may also be relevant to this phenomenon. The micropyramids can function as field emission point sources, as demonstrated with the use of a micronanoprobing station, mounted in a scanning electron microscope.
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Affiliation(s)
| | - Yukie Saito
- Graduate
School of Agricultural and Life Sciences, The University of Tokyo, Tokyo113-8657, Japan
| | - Luc Delmotte
- Université
de Haute-Alsace, CNRS, IS2M, UMR 7361, MulhouseF-68057, France
| | - Joseph Dentzer
- Université
de Haute-Alsace, CNRS, IS2M, UMR 7361, MulhouseF-68057, France
| | - Emmanuel Denys
- Université
de Haute-Alsace, CNRS, IS2M, UMR 7361, MulhouseF-68057, France
| | - Vincent Malesys
- Université
de Haute-Alsace, CNRS, IS2M, UMR 7361, MulhouseF-68057, France
| | - Ludovic Josien
- Université
de Haute-Alsace, CNRS, IS2M, UMR 7361, MulhouseF-68057, France
| | - Laurent Simon
- Université
de Haute-Alsace, CNRS, IS2M, UMR 7361, MulhouseF-68057, France
| | - Simon Gree
- Université
de Haute-Alsace, CNRS, IS2M, UMR 7361, MulhouseF-68057, France
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16
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Simon L, Steinmetz L, Feige B, Benz F, Spiegelhalder K, Baumeister H. Comparing Face-to-Face Cognitive Behavioral Therapy with Digitalized Cognitive Behavioral Therapy for Insomnia: A Network Meta-Analysis. Sleep Med 2022. [DOI: 10.1016/j.sleep.2022.05.313] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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17
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Simon L, Bellard E, Jouanmiqueou B, Lapinte V, Marcotte N, Devoisselle J, Lamaze C, Rols M, Golzio M, Begu S. Interactions of amphiphilic polyoxazolines formulated or not in lipid nanocapsules with biological systems: Evaluation from membrane models up to in vivo mice epidermis. Eur J Pharm Biopharm 2022; 180:308-318. [DOI: 10.1016/j.ejpb.2022.10.009] [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] [Received: 12/29/2021] [Revised: 08/29/2022] [Accepted: 10/12/2022] [Indexed: 11/04/2022]
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18
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Lear K, Simon L. A method to assess dermal absorption dynamics of chemical warfare agents: Finite doses of volatile compounds. J Occup Environ Hyg 2022; 19:603-614. [PMID: 35969798 DOI: 10.1080/15459624.2022.2112684] [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] [Indexed: 06/15/2023]
Abstract
Chemical warfare agents are absorbed into the body from various entry routes and may have detrimental effects on human health. As many chemical compounds in this group are lipophilic, the outer layer of the skin is at an elevated risk. This contribution explores the dynamics of skin penetration for risk assessment. A previously validated model was applied to describe how an agent is transported across the stratum corneum following dermal exposure to a finite dose of a chemical. A mathematical construct was implemented for estimating the time constants and the cumulative amount of permeant entering the bloodstream or being released into the environment. Empirical equations were selected to determine the ratio of the steady-state evaporation rate to the steady-state dermal absorption rate and the physicochemical properties of the chemical warfare agents. Wolfram Mathematica was employed to run the simulations. The results from the newly derived expressions for the time constants matched those directly obtained from the validated model. For example, sarin gas had steady-state evaporation to an absorption rate of 991.25, and a total fractional absorption and evaporation of 5.1% and 94.9%, respectively. Combined with occupational exposure limits, the findings can help researchers assess an individual's risk level and develop protection programs.
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Affiliation(s)
- Koko Lear
- Otto H. York Department and Chemical and Materials Engineering, New Jersey Institute of Technology, Newark, New Jersey
| | - Laurent Simon
- Otto H. York Department and Chemical and Materials Engineering, New Jersey Institute of Technology, Newark, New Jersey
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19
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Verspyck E, Gascoin G, Senat MV, Ego A, Simon L, Guellec I, Monier I, Zeitlin J, Subtil D, Vayssiere C. [Ante- and postnatal growth charts in France - guidelines for clinical practice from the Collège national des gynécologues et obstétriciens français (CNGOF) and from the Société française de néonatologie (SFN)]. Gynecol Obstet Fertil Senol 2022; 50:570-584. [PMID: 35781088 DOI: 10.1016/j.gofs.2022.06.008] [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] [Indexed: 06/15/2023]
Abstract
OBJECTIVE To recommend the most appropriate biometric charts for the detection of antenatal growth abnormalities and postnatal growth surveillance. METHODS Elaboration of specific questions and selection of experts by the organizing committee to answer these questions; analysis of the literature by experts and drafting conclusions by assigning a recommendation (strong or weak) and a quality of evidence (high, moderate, low, very low) and for each question; all these recommendations have been subject to multidisciplinary external review (obstetrician gynecologists, pediatricians). The objective for the reviewers was to verify the completeness of the literature review, to verify the levels of evidence established and the consistency and applicability of the resulting recommendations. The overall review of the literature, quality of evidence and recommendations were revised to take into consideration comments from external reviewers. RESULTS Antenatally, it is recommended to use all WHO fetal growth charts for EFW and common ultrasound biometric measurements (strong recommendation; low quality of evidence). Indeed, in comparison with other prescriptive curves and descriptive curves, the WHO prescriptive charts show better performance for the screening of SGA (Small for Gestational Age) and LGA (Large for Gestational Age) with adequate proportions of fetuses screened at extreme percentiles in the French population. It also has the advantages of having EFW charts by sex and biometric parameters obtained from the same perspective cohort of women screened by qualified sonographers who measured the biometric parameters according to international standards. Postnatally, it is recommended to use the updated Fenton charts for the assessment of birth measurements and for growth monitoring in preterm infants (strong recommendation; moderate quality of evidence) and for the assessment of birth measurements in term newborn (expert opinion). CONCLUSION It is recommended to use WHO fetal growth charts for antenatal growth monitoring and Fenton charts for the newborn.
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Affiliation(s)
- E Verspyck
- Service de gynécologie-obstétrique, CHU de Rouen, université de Rouen, Rouen, France.
| | - G Gascoin
- Service de néonatologie, CHU de Toulouse, université de Toulouse, hôpital des enfants, Toulouse, France
| | - M-V Senat
- Service de gynécologie-obstétrique, CHU du Kremlin-Bicêtre, université du Kremlin-Bicêtre, Le Kremlin-Bicêtre, France
| | - A Ego
- Pôle santé publique, CHU de Grenoble-Alpes, Grenoble, France
| | - L Simon
- Service de néonatologie, CHU de Nantes, université de Nantes, Nantes, France
| | - I Guellec
- Service de néonatologie, CHU de Nice, université de Nice, Nice, France
| | - I Monier
- Inserm UMR1153, équipe de recherche en épidémiologie obstétricale, périnatale et pédiatrique (EPOPé), CRESS, Sorbonne Paris-Cité, Paris, France; Service de gynécologie-obstétrique, université Paris Saclay, hôpital Antoine-Béclère, AP-HP, Clamart, France
| | - J Zeitlin
- Inserm UMR1153, équipe de recherche en épidémiologie obstétricale, périnatale et pédiatrique (EPOPé), CRESS, Sorbonne Paris-Cité, Paris, France
| | - D Subtil
- Service de gynécologie-obstétrique, CHU de Lille, université de Lille, Lille, France
| | - C Vayssiere
- Service de gynécologie-obstétrique, CHU de Toulouse, hôpital Paule-de-Viguier, Toulouse, France; Team SPHERE (Study of Perinatal, pediatric and adolescent Health: Epidemiological Research and Evaluation), CERPOP, UMR 1295, Toulouse III University, Toulouse, France
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20
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Guégan M, Martin E, Tran Van V, Fel B, Hay AE, Simon L, Butin N, Bellvert F, Haichar FEZ, Valiente Moro C. Mosquito sex and mycobiota contribute to fructose metabolism in the Asian tiger mosquito Aedes albopictus. Microbiome 2022; 10:138. [PMID: 36038937 PMCID: PMC9425969 DOI: 10.1186/s40168-022-01325-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 07/11/2022] [Indexed: 05/31/2023]
Abstract
BACKGROUND Plant floral nectars contain natural sugars such as fructose, which are a primary energy resource for adult mosquitoes. Despite the importance of carbohydrates for mosquito metabolism, a limited knowledge is available about the pathways involved in sugar assimilation by mosquitoes and their associated microbiota. To this end, we used 13C-metabolomic and stable isotope probing approaches coupled to high-throughput sequencing to reveal fructose-related mosquito metabolic pathways and the dynamics of the active gut microbiota following fructose ingestion. RESULTS Our results revealed significant differences in metabolic pathways between males and females, highlighting different modes of central carbon metabolism regulation. Competitive and synergistic interactions of diverse fungal taxa were identified within the active mycobiota following fructose ingestion. In addition, we identified potential cross-feeding interactions between this. Interestingly, there is a strong correlation between several active fungal taxa and the presence of fructose-derived metabolites. CONCLUSIONS Altogether, our results provide novel insights into mosquito carbohydrate metabolism and demonstrate that dietary fructose as it relates to mosquito sex is an important determinant of mosquito metabolism; our results also further highlight the key role of active mycobiota interactions in regulating the process of fructose assimilation in mosquitoes. This study opens new avenues for future research on mosquito-microbiota trophic interactions related to plant nectar-derived sugars. Video abstract.
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Affiliation(s)
- Morgane Guégan
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR Ecologie Microbienne, F-69622, Villeurbanne, France
| | - Edwige Martin
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR Ecologie Microbienne, F-69622, Villeurbanne, France
| | - Van Tran Van
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR Ecologie Microbienne, F-69622, Villeurbanne, France
| | - Benjamin Fel
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR Ecologie Microbienne, F-69622, Villeurbanne, France
| | - Anne-Emmanuelle Hay
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR Ecologie Microbienne, F-69622, Villeurbanne, France
| | - Laurent Simon
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F-69622, Villeurbanne, France
| | - Noémie Butin
- MetaboHUB-MetaToul, National Infrastructure of Metabolomics and Fluxomics, Toulouse, France
- TBI, Université de Toulouse, CNRS, INRAE, INSA, Toulouse, France
| | - Floriant Bellvert
- MetaboHUB-MetaToul, National Infrastructure of Metabolomics and Fluxomics, Toulouse, France
- TBI, Université de Toulouse, CNRS, INRAE, INSA, Toulouse, France
| | - Feth El Zahar Haichar
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR Ecologie Microbienne, F-69622, Villeurbanne, France
- INSA-Lyon, Université Claude Bernard Lyon 1, CNRS, UMR5240, Microbiologie, Adaptation, Pathogénie, Université Lyon, 10 rue Raphaël Dubois, 69622, Villeurbanne, France
| | - Claire Valiente Moro
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR Ecologie Microbienne, F-69622, Villeurbanne, France.
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21
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Simon L. Analysis of the absorption kinetics following dermal exposure to large doses of volatile organic compounds. Math Biosci 2022; 351:108889. [PMID: 35988791 DOI: 10.1016/j.mbs.2022.108889] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 08/09/2022] [Accepted: 08/10/2022] [Indexed: 10/15/2022]
Abstract
A mathematical method was developed to study the skin penetration of volatile organic compounds (VOCs) after exposure to a high dose of the substance. While closed-form solutions exist to describe the diffusion and evaporation from small amounts, numerical approaches are often implemented to predict dermal transport involving large doses. This work offers a Laplace transform-based method to estimate the time constant and dynamic and steady-state behaviors. First, the process was divided into two stages, separated by the time it took for excess chemicals to be depleted from the skin surface. Series solutions were written for the percutaneous VOC concentration, absorption and evaporation in the first stage. Application of Laplace transform methods yielded transient profiles after the compound dissipated from the surface of the stratum corneum. In addition, the procedure facilitated the calculation of the time constant and steady-state values. The method was validated using benchtop and fume hood experiments conducted with N,N-diethyl-3-methylbenzamide (DEET) and air velocities of 0.165 m/s and 0.72 m/s, respectively. The increase in the flow rate decreased the total amount of VOC absorbed and reduced the period required for the surface fluid to disappear.
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Affiliation(s)
- Laurent Simon
- Otto H. York Department of Chemical and Materials Engineering, New Jersey Institute of Technology, Newark NJ 07102, USA.
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22
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Licci S, Marmonier P, Wharton G, Delolme C, Mermillod-Blondin F, Simon L, Vallier F, Bouma TJ, Puijalon S. Scale-dependent effects of vegetation on flow velocity and biogeochemical conditions in aquatic systems. Sci Total Environ 2022; 833:155123. [PMID: 35405245 DOI: 10.1016/j.scitotenv.2022.155123] [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: 12/16/2021] [Revised: 04/04/2022] [Accepted: 04/05/2022] [Indexed: 06/14/2023]
Abstract
In rivers, scale-dependent feedbacks resulting from physical habitat modifications control the lateral expansion of submerged plant patches, while the mechanisms that limit patch expansion on a longitudinal dimension remain unknown. Our objective was to investigate the effects of patch length on physical habitat modification (i.e., flow velocity, sediment grain size distribution), the consequences for biogeochemical conditions (i.e., accumulation/depletion of nutrients, microbial respiration), and for individual plants (i.e., shoot length). We measured all of these parameters along natural patches of increasing length. These measurements were performed at two sites that differed in mean flow velocity, sediment grain size, and trophic level. The results showed a significant effect of patch length on organic matter content and nutrient concentrations in interstitial water. For the shortest patches sampled, all of these parameters had similar values to those measured at the upstream control position. For longer patches, organic matter content and orthophosphate and ammonium concentrations increased within the patch compared to the upstream bare sediment, whereas nitrate concentrations decreased, suggesting changes in vertical water exchanges and an increase in anaerobic microbial activities. Furthermore, plant height was related to patch length by a quadratic pattern, probably due reduced hydrodynamic stress occurring for increasing patch length, combined with conditions that are less favourable for plants over a threshold length, possibly due to the light limitation or to the high concentration of ammonium that in the concentration range we measured may be toxic for plants. The threshold lengths over which patches influence the nutrient concentrations were reduced for the site with higher nutrient levels. We demonstrated that the plant-induced modifications of the physical habitat exert important effects on biogeochemical conditions, with possible consequences for patch dynamics and ecosystem functioning.
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Affiliation(s)
- Sofia Licci
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F-69622 Villeurbanne, France
| | - Pierre Marmonier
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F-69622 Villeurbanne, France
| | | | - Cécile Delolme
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F-69622 Villeurbanne, France; Univ Lyon, INSA-LYON, DEEP, F-69621 Villeurbanne, France
| | - Florian Mermillod-Blondin
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F-69622 Villeurbanne, France
| | - Laurent Simon
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F-69622 Villeurbanne, France
| | - Félix Vallier
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F-69622 Villeurbanne, France
| | - Tjeerd J Bouma
- NIOZ, Royal Netherlands Institute for Sea Research, Department of Estuarine and Delta Systems, Utrecht University, PO Box 140, 4400 AC Yerseke, the Netherlands; Faculty of Geosciences, Utrecht University, PO Box 80115, 3508 TC Utrecht, the Netherlands
| | - Sara Puijalon
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F-69622 Villeurbanne, France.
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Olivier E, Sophie A, Maeva L, Jean-François F, Jocelyn M, Emilia F, Sophie B, Cécile J, Gabrielle C, Audrey F, Simon L, Lena S, Pierre C, Aba M, Guillaume B. Impact of vaccination on the symptoms of hospitalised patients with SARS-CoV-2 delta variant (B.1.617.1) infection. Clin Microbiol Infect 2022; 28:1629-1635. [PMID: 35779764 PMCID: PMC9242694 DOI: 10.1016/j.cmi.2022.06.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 06/06/2022] [Accepted: 06/16/2022] [Indexed: 11/25/2022]
Abstract
OBJECTIVES The diffusion of the SARS-CoV-2 delta (B.1.617.2) variant and the waning of immune response after primary Covid-19 vaccination favoured the breakthrough SARS-CoV-2 infections in vaccinated subjects. To assess the impact of vaccination, we determined the severity of infection in hospitalised patients according to vaccine status. METHODS We performed a retrospectiveobservational study on patients hospitalised in 10 centres with a SARS-CoV-2 infection (delta variant) from July to November 2021 by including all patients who had completed their primary vaccination at least 14 days before hospital admission and the same number of completely unvaccinated patients. We assessed the impact of vaccination and other risk factors through logistic regression. RESULTS We included 955 patients (474 vaccinated and 481 unvaccinated). Vaccinated patients were significantly older (75.0 [63.25-84.0] vs. 55.0 [38.0-73.0]; p<0.001), more frequently males (55.1% (261/474) vs. 46.4% (223/481); p=0.009), and had more comorbidities (2.0 [1.0-3.0] vs. 1.0 [0.0-2.0]; p<0.001). Vaccinated patients were less often admitted for Covid-19 (59.3% (281/474) vs. 75.1% (361/481); p<0.001), had less extended lung lesions (≤25%: 64.3% (117/182) vs. 38.4% (88/229); p<0.001), required oxygen less frequently (57.5% (229/398) vs. 73.0% (270/370); p<0.001), at a lower flow (3.0 [0.0-8.7] vs. 6.0 [2.0-50.0] L/min, p<0.001), and for a shorter duration (3 [0.0-8.0] vs. 6 [2.0-12.0] days, p<0.001)., and required less frequently intensive care unit admission (16.2% (60/370) vs. 36.0% (133/369); p<0.001) but had comparable mortality in bivariate analysis (16.7% (74/443) vs. 12.2% (53/433); p=0.075). Multivariate logistic regression showed that vaccination significantly decreased the risk of death (0.38 [0.20-0.70](p=0.002), ICU admission (0.31 [0.21-0.47](p<0.001) and oxygen requirement (0.16 [0.10-0.26](p<0.001), even among older patients or with comorbidities. CONCLUSIONS Among patients hospitalised with a delta variant SARS-CoV-2 infection, vaccination was associated with less severe forms, even in the presence of comorbidities.
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Affiliation(s)
- Epaulard Olivier
- infectious diseases, Centre Hospitalier Universitaire Grenoble Alpes, Grenoble, France; Groupe de Recherche en Infectiologie Clinique, CIC-1406, Inserm-CHUGA-UGA, Grenoble, France; Groupe Vaccination-Prévention de la Société de Pathologie Infectieuse de Langue Française (SPILF).
| | - Abgrall Sophie
- Groupe Vaccination-Prévention de la Société de Pathologie Infectieuse de Langue Française (SPILF); APHP, Hôpital Antoine Béclère, Service de Médecine Interne, Clamart; Université Paris-Saclay, UVSQ, INSERM U1018, CESP, Le Kremlin-Bicêtre, France
| | - Lefebvre Maeva
- Groupe Vaccination-Prévention de la Société de Pathologie Infectieuse de Langue Française (SPILF); Infectious Diseases Department, Centre for Prevention of Infectious and Transmissible Diseases, CHU Nantes and INSERM UIC 1413 Nantes University, Nantes, France
| | - Faucher Jean-François
- CHU Limoges, Department of Infectious Diseases and Tropical Medicine, Limoges, France; Inserm U1094, IRD U270, Univ. Limoges, CHU Limoges, EpiMaCT; Groupe Vaccination-Prévention de la Société de Pathologie Infectieuse de Langue Française (SPILF)
| | - Michon Jocelyn
- Department of Infectious diseases, University Hospital of Caen, Caen, France; Groupe Vaccination-Prévention de la Société de Pathologie Infectieuse de Langue Française (SPILF)
| | - Frentiu Emilia
- Infectious diseases department, Centre Hospitalier Universitaire de Nancy, Nancy, France; Groupe Vaccination-Prévention de la Société de Pathologie Infectieuse de Langue Française (SPILF)
| | - Blanchi Sophie
- Infectious diseases department, Centre Hospitalier, Le Mans, France; Groupe Vaccination-Prévention de la Société de Pathologie Infectieuse de Langue Française (SPILF)
| | - Janssen Cécile
- Infectious Disease Unit, Centre Hospitalier Annecy Genevois, Annecy, France; Groupe Vaccination-Prévention de la Société de Pathologie Infectieuse de Langue Française (SPILF)
| | - Charbonnier Gabrielle
- Infectious diseases department, Centre Hospitalier Universitaire Grenoble-Alpes, Grenoble, France; Groupe Vaccination-Prévention de la Société de Pathologie Infectieuse de Langue Française (SPILF)
| | - Fresse Audrey
- Pharmacovigilance, Centre Hospitalier Universitaire de Nancy, Nancy, France; Groupe Vaccination-Prévention de la Société de Pathologie Infectieuse de Langue Française (SPILF)
| | - Laurent Simon
- Department of Infectious diseases, University Hospital of Caen, Caen, France; Groupe Vaccination-Prévention de la Société de Pathologie Infectieuse de Langue Française (SPILF)
| | - Sandjakian Lena
- CHU Limoges, Department of Infectious Diseases and Tropical Medicine, Limoges, France; Groupe Vaccination-Prévention de la Société de Pathologie Infectieuse de Langue Française (SPILF)
| | - Casez Pierre
- Infectious Disease Unit, Centre Hospitalier Annecy Genevois, Annecy, France; Groupe Vaccination-Prévention de la Société de Pathologie Infectieuse de Langue Française (SPILF)
| | - Mahamat Aba
- Regional Centre for Prevention of Infectious Diseases and Healthcare-Associated Infections, General Hospital of Ajaccio; Ajaccio, France; Groupe Vaccination-Prévention de la Société de Pathologie Infectieuse de Langue Française (SPILF)
| | - Beraud Guillaume
- Department of Internal Medicine and Infectious Diseases, University Hospital of Poitiers; Poitiers, France; Groupe Vaccination-Prévention de la Société de Pathologie Infectieuse de Langue Française (SPILF)
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Delbaere A, Hammel N, Saadi O, Simon L, Khamphan C, Vieillevigne L. PO-1533 Determination of field output correction factors for the IBA Razor Diode. Radiother Oncol 2022. [DOI: 10.1016/s0167-8140(22)03497-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Cordonnier M, Kaufmann B, Simon L, Escarguel G, Mondy N. Discrimination of conspecifics from heterospecifics in a hybrid zone: Behavioral and chemical cues in ants. Insect Sci 2022; 29:276-288. [PMID: 33913250 DOI: 10.1111/1744-7917.12915] [Citation(s) in RCA: 1] [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] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 02/17/2021] [Accepted: 02/22/2021] [Indexed: 06/12/2023]
Abstract
Species and nestmate recognition in social insects occurs mostly through cuticular hydrocarbons acting as chemical cues. These compounds generate a colony-specific odor profile depending on genetic and environmental factors. Species and nestmate recognition results in specific behavioral responses, regulating the level of aggression toward other individuals during an interaction. Although species discrimination and recognition cues have been poorly studied in the context of interspecific hybridization, such systems offer an opportunity to further investigate the influence of heritable and environmental factors on recognition. We explored the strength of discrimination in a hybrid zone between two ant species-Tetramorium immigrans and T. caespitum-by comparing cuticular hydrocarbon profiles and measuring intra- and interspecific worker aggression in both areas of sympatry and areas of allopatry among species. Species cuticular hydrocarbon profiles were well-differentiated and interspecific aggression was high, revealing highly discriminating species recognition cues. Hybrids' cuticular hydrocarbon profiles consisted of a mixture of the parental bouquets, but also exhibited hybrid-specific patterns. Behavioral assays showed that T. immigrans is as aggressive toward hybrids as toward heterospecifics. Finally, aggression between heterospecific workers was lower when interacting individuals came from areas of sympatry among species than from areas of allopatry. Taken as a whole, these findings paint a particularly complex picture of the recognition system in T. immigrans, T. caespitum, and their hybrids, and highlight that hybrid zones afford a still underexplored opportunity for investigating recognition mechanisms and discrimination between species.
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Affiliation(s)
- Marion Cordonnier
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F-69622, Villeurbanne, France
| | - Bernard Kaufmann
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F-69622, Villeurbanne, France
| | - Laurent Simon
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F-69622, Villeurbanne, France
| | - Gilles Escarguel
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F-69622, Villeurbanne, France
| | - Nathalie Mondy
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F-69622, Villeurbanne, France
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Blanchard T, Lecomte P, Melon M, Simon L, Hassan K, Nicol R. Experimental acoustic scene analysis using One-Eighth spherical fraction microphone array. J Acoust Soc Am 2022; 151:180. [PMID: 35105033 DOI: 10.1121/10.0009230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 12/09/2021] [Indexed: 06/14/2023]
Abstract
This paper investigates the performance of one-eighth Spherical Fraction Microphone Array through experimental measurement to analyze acoustic scenes in one-eighth of space. The array geometry is designed to be placed in a room corner at the junction of three acoustically rigid walls. Two prototypes are built with 8 and 16 microphones, respectively. The sampling strategy is discussed and a spatial aliasing analysis is carried out both analytically and by numerical simulations. The array performances are evaluated through Spherical Fraction Beamforming (SFB). This approach is based on the decomposition of the acoustic pressure field in a rigid bounded domain. The localization angular error and Directivity Index criterion are evaluated for both arrays. In a first experiment, the arrays are mounted in an eighth of space built inside an anechoic room. The results are compared with simulation and show consistency. The theoretical limitations of SFB in a rigid bounded one-eighth of space are retrieved experimentally. These limitations are also observed in a real configuration: an office room. Further investigations on SFB are also conducted in the case of a virtual scene constructed with two sound sources.
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Affiliation(s)
- T Blanchard
- Laboratoire d'Acoustique de l'Université du Mans (LAUM), UMR 6613, Institut d'Acoustique - Graduate School (IA-GS), CNRS, Le Mans Université, France
| | - P Lecomte
- University of Lyon, Université Claude Bernard Lyon 1, CNRS, Ecole Centrale Lyon, INSA Lyon, LMFA, UMR5509, 69622 Villeurbanne, France
| | - M Melon
- Laboratoire d'Acoustique de l'Université du Mans (LAUM), UMR 6613, Institut d'Acoustique - Graduate School (IA-GS), CNRS, Le Mans Université, France
| | - L Simon
- Laboratoire d'Acoustique de l'Université du Mans (LAUM), UMR 6613, Institut d'Acoustique - Graduate School (IA-GS), CNRS, Le Mans Université, France
| | - K Hassan
- Laboratoire d'Acoustique de l'Université du Mans (LAUM), UMR 6613, Institut d'Acoustique - Graduate School (IA-GS), CNRS, Le Mans Université, France
| | - R Nicol
- Orange Labs, 2 Avenue Pierre Marzin, 22307 Lannion Cedex, France
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Yashar C, Khan A, Haffty B, Chen P, Yehia Z, Vicini F, Kowzun M, Quinn T, Scanderbeg D, Simon L, Kuske R. Three-Fraction TRIUMPH-T Brachytherapy for Delivery of APBI Offers Effective Disease Control With Minimal Late Toxicity. Int J Radiat Oncol Biol Phys 2021. [DOI: 10.1016/j.ijrobp.2021.07.049] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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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Simon L, Picard C, Calixto L, Lapinte V, Devoisselle J, Bégu S. Study of the physicochemical interactions of nanoformulations based on polyoxazolines with a skin surface model. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Ali-Brandmeyer O, Blanckaert K, Nion-Huang M, Simon L, Birgand G. Consumption of alcohol-based hand rub in French nursing homes: results from a nationwide survey, 2018-2019. J Hosp Infect 2021; 118:27-31. [PMID: 34534602 DOI: 10.1016/j.jhin.2021.09.002] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 08/30/2021] [Accepted: 09/05/2021] [Indexed: 11/28/2022]
Abstract
This study assessed the hand hygiene performance in French nursing homes using the consumption of alcohol-based hand rubs (AHRs) as a surrogate. Nursing homes from the 17 French regions were contacted to collect their AHR consumption and occupancy in 2018 and 2019. A total of 1290 nursing homes from 15 French regions participated in the survey. The estimated median number of hand hygiene actions per resident-day was 1.48 (interquartile range: 1.04-2.03) in 2018 and 1.60 (1.10-2.26) in 2019. A significantly higher AHR consumption was observed in public nursing homes with an infection control team or link nurse.
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Affiliation(s)
- O Ali-Brandmeyer
- Centre d'appui à la prévention des infections associées aux soins Grand Est, Nancy, France; National Center for the Surveillance and Prevention of the Antimicrobial Resistance and Healthcare Associated Infections in Primary Cares and Nursing Homes, PRIMO, France
| | - K Blanckaert
- National Center for the Surveillance and Prevention of the Antimicrobial Resistance and Healthcare Associated Infections in Primary Cares and Nursing Homes, PRIMO, France; Centre d'appui à la prévention des infections associées aux soins des Pays de la Loire, Nantes, France
| | - M Nion-Huang
- Santé Publique France, Département des Maladies Infectieuses, Saint Maurice, France
| | - L Simon
- Centre d'appui à la prévention des infections associées aux soins Grand Est, Nancy, France; National Center for the Surveillance and Prevention of the Antimicrobial Resistance and Healthcare Associated Infections in Primary Cares and Nursing Homes, PRIMO, France
| | - G Birgand
- National Center for the Surveillance and Prevention of the Antimicrobial Resistance and Healthcare Associated Infections in Primary Cares and Nursing Homes, PRIMO, France; Centre d'appui à la prévention des infections associées aux soins des Pays de la Loire, Nantes, France; NIHR Health Protection Research Unit, Antimicrobial Resistance and Healthcare Associated Infection at Imperial College London, London, UK.
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Grigsby E, Rickam M, Thewlis D, Simon L, Chavez R, Huston M, Rieger J, Glover D, Collins S. XT-150- A novel immunomodulatory gene therapy for osteoarthritis pain in phase 2b development. Osteoarthritis Cartilage 2021. [DOI: 10.1016/j.joca.2021.05.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
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Robert C, Munoz A, Moreau D, Mazurier J, Sidorski G, Gasnier A, Beldjoudi G, Grégoire V, Deutsch E, Meyer P, Simon L. Clinical implementation of deep-learning based auto-contouring tools-Experience of three French radiotherapy centers. Cancer Radiother 2021; 25:607-616. [PMID: 34389243 DOI: 10.1016/j.canrad.2021.06.023] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 06/17/2021] [Accepted: 06/18/2021] [Indexed: 12/23/2022]
Abstract
Deep-learning (DL)-based auto-contouring solutions have recently been proposed as a convincing alternative to decrease workload of target volumes and organs-at-risk (OAR) delineation in radiotherapy planning and improve inter-observer consistency. However, there is minimal literature of clinical implementations of such algorithms in a clinical routine. In this paper we first present an update of the state-of-the-art of DL-based solutions. We then summarize recent recommendations proposed by the European society for radiotherapy and oncology (ESTRO) to be followed before any clinical implementation of artificial intelligence-based solutions in clinic. The last section describes the methodology carried out by three French radiation oncology departments to deploy CE-marked commercial solutions. Based on the information collected, a majority of OAR are retained by the centers among those proposed by the manufacturers, validating the usefulness of DL-based models to decrease clinicians' workload. Target volumes, with the exception of lymph node areas in breast, head and neck and pelvic regions, whole breast, breast wall, prostate and seminal vesicles, are not available in the three commercial solutions at this time. No implemented workflows are currently available to continuously improve the models, but these can be adapted/retrained in some solutions during the commissioning phase to best fit local practices. In reported experiences, automatic workflows were implemented to limit human interactions and make the workflow more fluid. Recommendations published by the ESTRO group will be of importance for guiding physicists in the clinical implementation of patient specific and regular quality assurances.
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Affiliation(s)
- C Robert
- Department of Radiotherapy, Gustave-Roussy, Villejuif, France.
| | - A Munoz
- Department of Radiotherapy, Centre Léon-Bérard, Lyon, France
| | - D Moreau
- Department of Radiotherapy, Hôpital Européen Georges-Pompidou, Paris, France
| | - J Mazurier
- Department of Radiotherapy, Clinique Pasteur-Oncorad, Toulouse, France
| | - G Sidorski
- Department of Radiotherapy, Clinique Pasteur-Oncorad, Toulouse, France
| | - A Gasnier
- Department of Radiotherapy, Gustave-Roussy, Villejuif, France
| | - G Beldjoudi
- Department of Radiotherapy, Centre Léon-Bérard, Lyon, France
| | - V Grégoire
- Department of Radiotherapy, Centre Léon-Bérard, Lyon, France
| | - E Deutsch
- Department of Radiotherapy, Gustave-Roussy, Villejuif, France
| | - P Meyer
- Service d'Oncologie Radiothérapie, Institut de Cancérologie Strasbourg Europe (Icans), Strasbourg, France
| | - L Simon
- Institut Claudius Regaud (ICR), Institut Universitaire du Cancer de Toulouse - Oncopole (IUCT-O), Toulouse, France
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Delbaere A, Younes T, Simon L, Khamphan C, Vieillevigne L. PO-1582 Spencer-Attix stopping power ratios for flattening filter and flattening filter free photon beams. Radiother Oncol 2021. [DOI: 10.1016/s0167-8140(21)08033-6] [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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Jouzeau A, Chabaud A, Péfau M, Dugravot L, Lieutier-Colas F, Simon L, Dumartin C. Consommations d’antibiotiques pendant la première vague COVID-19 dans les établissements de santé. Infect Dis Now 2021. [PMCID: PMC8327514 DOI: 10.1016/j.idnow.2021.06.115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Introduction Lors de la première vague de l’épidémie de COVID-19, la réduction d’activité des établissements de santé (ES), notamment en chirurgie, a pu entraîner un moindre recours aux antibiotiques. Toutefois, l’accueil de nombreux patients atteints de COVID-19 a engendré la prescription de traitements antibiotiques visant à prévenir ou traiter des (suspicions de) surinfections bactériennes. Les consommations d’antibiotiques au premier trimestre 2020 (début de première vague) ont été comparées à celles du deuxième trimestre (pic de la première vague) afin d’estimer l’impact de l’épidémie sur l’utilisation d’antibiotiques. Matériels et méthodes Les consommations d’antibiotiques à visée systémique dispensés dans les services d’hospitalisation complète ont été recueillies pour la période du 1er janvier au 31 mars 2020 (T1) puis du 1er avril au 30 juin 2020 (T2), dans des ES volontaires participant à la surveillance nationale SPARES, et ayant indiqué avoir accueilli ou non des patients COVID-19. Elles ont été exprimées en nombre de doses définies journalières (DDJ) pour 1000 journées d’hospitalisation (JH) et comparées entre T1 et T2 dans les secteurs d’activité clinique de réanimation, médecine et soins de suite et réadaptation (SSR) (test de Wilcoxon des rangs signés). Résultats Dans les 118 ES ayant accueilli des patients COVID-19 (C+) en T1 et T2 et les 75 ES n’en ayant pas accueilli (C−), l’activité en nombre de JH avait diminué de 14 % et 13 % respectivement. La consommation globale d’antibiotique était plus faible en T2 par rapport à T1 dans 35 secteurs de réanimation C+ (−19 %), 72 secteurs de médecine C+ (−9 %) et 25 secteurs de médecine C− (−19 %), ainsi que dans 37 SSR C− (−14 %). En réanimation, les consommations d’azithromycine, ceftriaxone, cefotaxime et amoxicilline–acide clavulanique étaient significativement plus faibles en T2 et celle de ceftazidime significativement plus élevée. La consommation d’antibiotiques était plus élevée en T2 dans 43 secteurs de SSR C+ (+6 %), avec une consommation de ceftriaxone significativement plus élevée. Conclusion Globalement, la pression de sélection antibiotique semble avoir été plus faible en T2 dans les ES volontaires ayant fourni des données de consommation par secteur d’activité clinique, qu’ils aient accueilli ou non des patients COVID-19. Cette tendance peut être liée à la réduction d’activité liée, d’une part, aux déprogrammations, et d’autre part, au confinement qui a réduit le nombre d’infections nécessitant potentiellement une hospitalisation. De plus, la mobilisation des comités anti-infectieux a pu conduire à la diffusion de recommandations de bon usage des antibiotiques pour les patients COVID-19 avant même la parution de l’avis du HCSP en juin. Toutefois, s’agissant de données agrégées de dispensation et non de données individuelles d’administration, un effet stockage en T1 ne peut être écarté. L’effet à moyen terme sur les résistances bactériennes reste à évaluer.
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Somayaji MR, Das D, Garimella HT, German CL, Przekwas AJ, Simon L. An Integrated Biophysical Model for Predicting the Clinical Pharmacokinetics of Transdermally Delivered Compounds. Eur J Pharm Sci 2021; 167:105924. [PMID: 34289340 DOI: 10.1016/j.ejps.2021.105924] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 06/01/2021] [Accepted: 06/30/2021] [Indexed: 11/19/2022]
Abstract
The delivery of therapeutic drugs through the skin is a promising alternative to oral or parenteral delivery routes because dermal drug delivery systems (D3S) offer unique advantages such as controlled drug release over sustained periods and a significant reduction in first-pass effects, thus reducing the required dosing frequency and level of patient noncompliance. Furthermore, D3S find applications in multiple therapeutic areas, including drug repurposing. This article presents an integrated biophysical model of dermal absorption for simulating the permeation and absorption of compounds delivered transdermally. The biophysical model is physiologically/biologically inspired and combines a holistic model of healthy skin with whole-body physiology-based pharmacokinetics through dermis microcirculation. The model also includes the effects of chemical penetration enhancers and hair follicles on transdermal transport. The model-predicted permeation and pharmacokinetics of select compounds were validated using in vivo data reported in the literature. We conjecture that the integrated model can be used to gather insights into the permeation and systemic absorption of transdermal formulations (including cosmetic products) released from novel depots and optimize delivery systems. Furthermore, the model can be adapted to diseased skin with parametrization and structural adjustments specific to skin diseases.
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Affiliation(s)
- Mahadevabharath R Somayaji
- Manager, Computational Medicine and Biology, CFD Research Corporation, Huntsville, AL 35806, United States.
| | - Debarun Das
- Manager, Computational Medicine and Biology, CFD Research Corporation, Huntsville, AL 35806, United States
| | - Harsha Teja Garimella
- Manager, Computational Medicine and Biology, CFD Research Corporation, Huntsville, AL 35806, United States
| | - Carrie L German
- Manager, Computational Medicine and Biology, CFD Research Corporation, Huntsville, AL 35806, United States
| | - Andrzej J Przekwas
- Manager, Computational Medicine and Biology, CFD Research Corporation, Huntsville, AL 35806, United States
| | - Laurent Simon
- Otto H. York Department of Chemical and Materials Engineering, New Jersey Institute of Technology, Newark, NJ 07102, United States
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Meyer P, Biston MC, Khamphan C, Marghani T, Mazurier J, Bodez V, Fezzani L, Rigaud PA, Sidorski G, Simon L, Robert C. Automation in radiotherapy treatment planning: Examples of use in clinical practice and future trends for a complete automated workflow. Cancer Radiother 2021; 25:617-622. [PMID: 34175222 DOI: 10.1016/j.canrad.2021.06.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 06/04/2021] [Indexed: 01/19/2023]
Abstract
Modern radiotherapy treatment planning is a complex and time-consuming process that requires the skills of experienced users to obtain quality plans. Since the early 2000s, the automation of this planning process has become an important research topic in radiotherapy. Today, the first commercial automated treatment planning solutions are available and implemented in a growing number of clinical radiotherapy departments. It should be noted that these various commercial solutions are based on very different methods, implying a daily practice that varies from one center to another. It is likely that this change in planning practices is still in its infancy. Indeed, the rise of artificial intelligence methods, based in particular on deep learning, has recently revived research interest in this subject. The numerous articles currently being published announce a lasting and profound transformation of radiotherapy planning practices in the years to come. From this perspective, an evolution of initial training for clinical teams and the drafting of new quality assurance recommendations is desirable.
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Affiliation(s)
- P Meyer
- Department of radiotherapy, Institut de Cancérologie Strasbourg Europe (ICANS), Strasbourg, France; ICUBE, CNRS UMR 7357, team IMAGES, Strasbourg, France.
| | - M-C Biston
- Department of radiotherapy, Centre Léon Bérard (CLB), Lyon, France; CREATIS, CNRS UMR5220, Inserm U1044, INSA-Lyon, Université Lyon 1, Villeurbanne, France
| | - C Khamphan
- Department of medical physics, Institut du Cancer Avignon-Provence, Avignon, France
| | - T Marghani
- Institut de radiothérapie Amethyst du Sud de l'Oise, Creil, France
| | - J Mazurier
- Centre de radiothérapie Oncorad Garonne, Toulouse, France
| | - V Bodez
- Department of medical physics, Institut du Cancer Avignon-Provence, Avignon, France
| | - L Fezzani
- Institut de radiothérapie Amethyst du Sud de l'Oise, Creil, France
| | - P A Rigaud
- Institut de radiothérapie Amethyst du Sud de l'Oise, Creil, France
| | - G Sidorski
- Centre de radiothérapie Oncorad Garonne, Toulouse, France
| | - L Simon
- Institut Claudius Regaud (ICR), Institut Universitaire du Cancer de Toulouse-Oncopole (IUCT-O), Toulouse, France; Centre de Recherches en Cancérologie de Toulouse (CRCT), Université de Toulouse, INSERM U1037, Toulouse, France
| | - C Robert
- Université Paris-Saclay, Institut Gustave Roussy, INSERM, Radiothérapie Moléculaire et Innovation Thérapeutique, Villejuif, France; Department of Radiotherapy, Gustave Roussy, Villejuif, France
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Dolédec S, Simon L, Blemus J, Rigal A, Robin J, Mermillod-Blondin F. Multiple stressors shape invertebrate assemblages and reduce their trophic niche: A case study in a regulated stream. Sci Total Environ 2021; 773:145061. [PMID: 33940713 DOI: 10.1016/j.scitotenv.2021.145061] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 07/17/2020] [Revised: 10/12/2020] [Accepted: 12/06/2020] [Indexed: 06/12/2023]
Abstract
UNLABELLED Few studies have addressed how the diversity of basal resources change with stream regulation and the potential consequences on river biota. We sampled invertebrates above and below a series of dams, over two years, at both downwelling and upwelling zones. In each zone, we recorded the daily temperature and flow variations, estimated the algal development, measured the available resources, and analysed carbon and nitrogen stable isotope compositions of the invertebrate community. The number of hydrological pulses were typically higher below the dams than above the dams especially during high-flow periods whereas the groundwater outlets had minor effects on invertebrate assemblages. Invertebrate abundance, richness and diversity tended to decrease below the dams. Co-inertia analysis showed that flow and temperature variations, and eutrophication explained most of the variance in the invertebrate assemblages, which comprised a higher number of resilient taxa below than above the dams. The proportions of pesticide-sensitive invertebrates were lower below the dams and ovoviviparous and more generalist taxa were prominent. We did not observe the expected CPOM decrease and FPOM increase downstream. Accordingly, the proportions of each functional feeding group were remarkably similar above and below the dams despite the long distance between the sectors (>100 kms). The diversity of basal resources used within assemblages progressively increased downstream above dams. In contrast, the diversity of resources used by organisms below the dams decreased from upstream to downstream suggesting a significant influence of flow regulation on aquatic food webs. Finally, the shorter trophic chains for the invertebrate assemblages below the dams suggests that the effects of stream regulation and eutrophication induced a simplification of food webs. To our knowledge, this study is the first to connect taxonomic and functional trait changes in response to multiple stressors with the associated modifications in isotopic niches within aquatic invertebrate assemblages. CONTEXT Understanding how stream regulation and associated anthropogenic pressures act on aquatic assemblages and trophic niches is necessary to guide management actions. GOAL We aimed to investigate the functional responses (traits and trophic niches) of aquatic invertebrate assemblages to stream regulation and eutrophication. METHODS We used univariate and multivariate analyses to compare the invertebrate assemblages above and below the dams and to assess the contributions of hydrology (including groundwater supplies to the river), temperature and eutrophication to the variability in the composition of invertebrate assemblages. We also considered the relative utilization of a selected set of traits describing invertebrate resilience, resistance and specialization to address the potential functional effects of stream regulation on invertebrate assemblages. Finally, carbon and nitrogen isotope analyses allowed us to characterize the length and width of invertebrate assemblage food webs as related to the availability and diversity of basal resources. RESULTS Invertebrate abundance and richness generally decreased below the dams, with the highest impacts on insect taxa. Co-inertia analysis showed that stream regulation and eutrophication were main drivers of the aquatic invertebrate assemblages. The analysis separated the sites above and below the dams according to flow and temperature variation, whereas eutrophication appeared as a secondary stressor that separated the sites within each sector. Furthermore, the series of dams resulted in (i) a higher proportion of resilient (e.g., multivoltine) and resistant (ovoviviparous) taxa and a majority of generalists in assemblages below dams, (ii) an impact on the classical dynamics of CPOM (decrease) and FPOM (increase) sources from upstream to downstream, and (iii) a reduction in the diversity of resource use and in the trophic chain length of invertebrate assemblages below dams. The cooler and less oxygenated upwelling zones had lower invertebrate abundance; however, contrary to our expectation, the variation in the groundwater supply did not affect the composition of epigean invertebrate assemblages. CONCLUSION This study provides insights about the impacts of flow regime alteration and eutrophication on food webs that may have been caused by regulation of permanent streams. To our knowledge, this is the first to connect taxonomic and functional trait changes in response to multiple stressors with the associated modifications in energy fluxes in aquatic invertebrate assemblages. This study suggests that bed stability, which is associated with a reduction in channel mobility below the dams and with moderate eutrophication, may provide the shelter and resources that can locally favour invertebrate assemblage dynamics and lessen the effects of flow regulation. In addition, the study suggests that the biological trait-based approach and isotope analysis are complementary approaches for addressing ecosystem functioning. The relative utilization of traits indicates the functional potential of aquatic invertebrate assemblages to face multiple stressors whereas isotope analysis is an expression of the actual effect of the stressors on the trophic structure of aquatic invertebrate assemblages.
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Affiliation(s)
- Sylvain Dolédec
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F-69622 Villeurbanne, France.
| | - Laurent Simon
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F-69622 Villeurbanne, France
| | - Jérémie Blemus
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F-69622 Villeurbanne, France
| | - Amandine Rigal
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F-69622 Villeurbanne, France
| | - Joël Robin
- Univ Lyon, ISARA, Agroecology and Environment research unit, F-69364 Lyon Cedex 07, France
| | - Florian Mermillod-Blondin
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F-69622 Villeurbanne, France
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Sevin T, Daniau C, Alfandari S, Piednoir E, Dumartin C, Blanchard H, Simon L, Berger-Carbonne A, Le Vu S. Patterns of antibiotic use in hospital-acquired infections. J Hosp Infect 2021; 114:104-110. [PMID: 34052283 DOI: 10.1016/j.jhin.2021.05.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 05/19/2021] [Accepted: 05/21/2021] [Indexed: 11/24/2022]
Abstract
BACKGROUND Monitoring the use of antimicrobials in hospitalized patients is critical owing to the risk of resistance selection. This study aimed to describe the patterns of antimicrobial prescription for the most frequent healthcare-associated infections (HAIs) in France, relating drugs and microbiological data. METHODS We used data from the 2017 point-prevalence survey of HAI and antimicrobial use in France, a large nationally representative sample survey of inpatients. We sought unambiguous correspondence between individual indications of antibiotic regimen and HAI sites to determine which molecules were directed towards which pathogen, considering its resistance profile. RESULTS Among 75,698 adult patients from 401 hospitals, 5.1% had an active HAI and 4.3% were being treated for an HAI. The two most frequent antibiotic indications were lower respiratory tract (LRTI, 27.7%) and urinary tract infections (UTI, 18.4%). For LRTI, the most prescribed antibiotic was amoxicillin-clavulanic acid (27.6%) and most frequently isolated pathogens (each accounting for around 17% of isolates) were Staphylococcus aureus, Pseudomonas aeruginosa and Escherichia coli. Meticillin-resistant S. aureus LRTI was more likely to be treated with linezolid. For UTI, ofloxacin, ceftriaxone, amoxicillin/co-amoxiclav were most-prescribed (∼13% each) and E. coli predominantly isolated (52.0%). Extended-spectrum beta-lactamase-producing E. coli UTI were more likely treated by fosfomycin, pivmecillinam or ertapenem. CONCLUSIONS This study provides a baseline of antimicrobial use in relation to microbiological information in patients with the most common HAIs. These results can serve to direct future efforts in antimicrobial stewardship. Our work could be extended to a broader population, notably in Europe where similar surveys have been conducted.
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Affiliation(s)
- T Sevin
- Direction des maladies infectieuses, Santé publique France, Saint-Maurice, France; Unité d'Hygiène et de Prévention des Infections, Centre Hospitalier Châteauroux - Le Blanc, Châteauroux, France
| | - C Daniau
- Direction des maladies infectieuses, Santé publique France, Saint-Maurice, France
| | - S Alfandari
- Service de Réanimation et Maladies Infectieuses, Centre Hospitalier de Tourcoing, Tourcoing, France
| | - E Piednoir
- Centre d'appui pour la prévention des infections associées aux soins (CPias) Bretagne, Rennes, France
| | - C Dumartin
- CPias Nouvelle Aquitaine, Université de Bordeaux, INSERM, BPH, U1219, Centre Hospitalier Universitaire de Bordeaux, Bordeaux, France
| | - H Blanchard
- CPias Île-de-France, Assistance Publique Hôpitaux de Paris, Paris, France
| | - L Simon
- CPias Grand Est, Centre Hospitalier Universitaire de Nancy, Vandœuvre-lès-Nancy, France
| | - A Berger-Carbonne
- Direction des maladies infectieuses, Santé publique France, Saint-Maurice, France
| | - S Le Vu
- Direction des maladies infectieuses, Santé publique France, Saint-Maurice, France.
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Saravia A, Torres D, Levitt D, Stowe CV, Molina P, Simon L. Chronic binge alcohol impairs glucose‐insulin dynamics in SIV‐infected female rhesus macaques. FASEB J 2021. [DOI: 10.1096/fasebj.2021.35.s1.01813] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- A. Saravia
- PhysiologyDepartment of PhysiologyLouisiana State University Health Sciences CenterNew OrleansLA
| | - D. Torres
- PhysiologyDepartment of PhysiologyLouisiana State University Health Sciences CenterNew OrleansLA
| | - D. Levitt
- PhysiologyDepartment of PhysiologyLouisiana State University Health Sciences CenterNew OrleansLA
| | - C. V. Stowe
- PhysiologyDepartment of PhysiologyLouisiana State University Health Sciences CenterNew OrleansLA
| | - P. Molina
- PhysiologyDepartment of PhysiologyLouisiana State University Health Sciences CenterNew OrleansLA
| | - L. Simon
- PhysiologyDepartment of PhysiologyLouisiana State University Health Sciences CenterNew OrleansLA
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Leaune E, Allali R, Rotgé JY, Simon L, Vieux M, Fossati P, Gaillard R, Gourion D, Masson M, Olié E, Vaiva G. Prevalence and impact of patient suicide in psychiatrists: Results from a national French web-based survey. Encephale 2021; 47:507-513. [PMID: 33814167 DOI: 10.1016/j.encep.2020.11.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 11/12/2020] [Accepted: 11/17/2020] [Indexed: 10/21/2022]
Abstract
BACKGROUND Patient suicide (PS) is known to be a frequent and challenging occupational hazard for mental health professionals. No study previously explored the prevalence and impact of PS in a large sample of French psychiatrists. METHOD A national web-based survey was performed between September and December 2019 to assess (a) the prevalence of the exposure to PS, (b) the emotional, traumatic and professional impacts of PS, and (c) the perceived support in the aftermath of PS in French psychiatrists. Participants were contacted through email to answer the online 62-item questionnaire, including a measure of traumatic impact through the Impact of Event Scale-Revised. Emotional and professional impacts and perceived support were assessed through dedicated items. RESULTS A total of 764 psychiatrists fully completed the survey. Of them, 87.3% reported an exposure to PS and 13.7% reported PTSD symptoms afterward. Guilt, sadness and shock were the most frequent emotions. Among the exposed psychiatrists, 15.1% have temporarily considered changing their career path. The most emotionally distressing PS occurred during their ten first years of practice or during residency. A total of 37.1% of respondents felt unsupported and 50.4% reported that no team meeting had been organized in the aftermath. The feeling of responsibility for the death was strongly associated with negative impacts. CONCLUSION Our results entail considerations to prevent negative mental health outcomes in psychiatrists after PS. Notably, our results advocate for the implementation of educational programs during psychiatric residency and postvention programs in healthcare settings to effectively help psychiatrists in dealing with PS.
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Affiliation(s)
- E Leaune
- Centre Hospitalier le Vinatier, Bron, France; INSERM, U1028, CNRS, UMR5292, Lyon Neuroscience Research Center, Psychiatric Disorders: from Resistance to Response - PSYR2 Team, 69000 Lyon, France.
| | - R Allali
- CHU Paris Seine-Saint-Denis, Hôpital Avicenne, Bobigny, France
| | - J-Y Rotgé
- AP-HP, Service de Psychiatrie d'Adultes, AP-HP-Sorbonne, Paris, France; Inserm U 1127, CNRS UMR 7225, Sorbonne Université, ICM-A-IHU, "Control-Interoception - Attention", Paris, France
| | - L Simon
- Centre Hospitalier le Vinatier, Bron, France
| | - M Vieux
- Centre Hospitalier le Vinatier, Bron, France
| | - P Fossati
- AP-HP, Service de Psychiatrie d'Adultes, AP-HP-Sorbonne, Paris, France; Inserm U 1127, CNRS UMR 7225, Sorbonne Université, ICM-A-IHU, "Control-Interoception - Attention", Paris, France
| | - R Gaillard
- Université de Paris, GHU Psychiatrie et neurosciences, Paris, France
| | - D Gourion
- Paris, France; HEC Paris, Jouy-en-Josas, France
| | - M Masson
- Nightingale Hospitals-Paris, Clinique du Château de Garches, Garches, France; SHU, GHU Psychiatrie et neurosciences, Paris, France
| | - E Olié
- Departement of Emergency Psychiatry and Acute Care, Lapeyronie Hospital, PSNREC, Université Montpellier, INSERM, CHU de Montpellier, Montpellier, France
| | - G Vaiva
- Université Lille, Inserm, CHU Lille, U1172, Lille Neuroscience & Cognition (LilNCog), 59000 Lille, France; Centre National de Ressources & Résilience pour les psychotraumatismes (Cn2r Lille Paris), 59000 Lille, France
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Freycenon N, Longo R, Simon L. Estimation of heart rate from tracheal sounds recorded for the sleep apnea syndrome diagnosis. IEEE Trans Biomed Eng 2021; 68:3039-3047. [PMID: 33625974 DOI: 10.1109/tbme.2021.3061734] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Obstructive sleep apnea is a common sleep disorder with a high prevalence and often accompanied by significant snoring activity. To diagnose this condition, polysomnography is the standard method, where a neck microphone could be added to record tracheal sounds. These can then be used to study the characteristics of breathing, snoring or apnea. In addition cardiac sounds, also present in the acquired data, could be exploited to extract heart rate. The paper presents new algorithms for estimating heart rate from tracheal sounds, especially in very loud snoring environment. The advantage is that it is possible to reduce the number of diagnostic devices, especially for compact home applications. Three algorithms are proposed, based on optimal filtering and cross-correlation. They are tested firstly on one patient presenting significant pathology of apnea syndrome, with a recording of 509 min. Secondly, an extension to a database of 16 patients is proposed (16 hours of recording). When compared to a reference ECG signal, the final results obtained from tracheal sounds reach an accuracy of 81% to 98% and an RMS error from 1.3 to 4.2 bpm, according to the level of snoring and to the considered algorithm.
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Capon M, Lysaniuk B, Godard V, Clauzel C, Simon L. Characterizing the landscape compositions of urban wildlife encounters: the case of the stone marten (Martes foina), the red fox (Vulpes vulpes) and the hedgehog (Erinaceus europaeus) in the Greater Paris area. Urban Ecosyst 2021. [DOI: 10.1007/s11252-020-01071-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Krause S, Baranov V, Nel HA, Drummond JD, Kukkola A, Hoellein T, Sambrook Smith GH, Lewandowski J, Bonet B, Packman AI, Sadler J, Inshyna V, Allen S, Allen D, Simon L, Mermillod-Blondin F, Lynch I. Gathering at the top? Environmental controls of microplastic uptake and biomagnification in freshwater food webs. Environ Pollut 2021; 268:115750. [PMID: 33172701 DOI: 10.1016/j.envpol.2020.115750] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [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: 07/13/2020] [Revised: 09/23/2020] [Accepted: 09/24/2020] [Indexed: 06/11/2023]
Abstract
Microplastics are ubiquitous in the environment, with high concentrations being detected now also in river corridors and sediments globally. Whilst there has been increasing field evidence of microplastics accumulation in the guts and tissues of freshwater and marine aquatic species, the uptake mechanisms of microplastics into freshwater food webs, and the physical and geological controls on pathway-specific exposures to microplastics, are not well understood. This knowledge gap is hampering the assessment of exposure risks, and potential ecotoxicological and public health impacts from microplastics. This review provides a comprehensive synthesis of key research challenges in analysing the environmental fate and transport of microplastics in freshwater ecosystems, including the identification of hydrological, sedimentological and particle property controls on microplastic accumulation in aquatic ecosystems. This mechanistic analysis outlines the dominant pathways for exposure to microplastics in freshwater ecosystems and identifies potentially critical uptake mechanisms and entry pathways for microplastics and associated contaminants into aquatic food webs as well as their risk to accumulate and biomagnify. We identify seven key research challenges that, if overcome, will permit the advancement beyond current conceptual limitations and provide the mechanistic process understanding required to assess microplastic exposure, uptake, hazard, and overall risk to aquatic systems and humans, and provide key insights into the priority impact pathways in freshwater ecosystems to support environmental management decision making.
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Affiliation(s)
- Stefan Krause
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, B15 2TT, Birmingham, United Kingdom; Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR5023, Ecologie des Hydrosystèmes Naturels et Anthropisés (LEHNA), 69622, Villeurbanne, France.
| | - Viktor Baranov
- Department of Biology II, Ludwig-Maximilians-University Munich, 82152, Planegg-Martinsried, Germany
| | - Holly A Nel
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, B15 2TT, Birmingham, United Kingdom
| | - Jennifer D Drummond
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, B15 2TT, Birmingham, United Kingdom
| | - Anna Kukkola
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, B15 2TT, Birmingham, United Kingdom
| | - Timothy Hoellein
- Loyola University Chicago, Department of Biology, Chicago, United States
| | - Gregory H Sambrook Smith
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, B15 2TT, Birmingham, United Kingdom
| | - Joerg Lewandowski
- Department of Ecohydrology, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany; Department of Geography, Humboldt University of Berlin, Berlin, Germany
| | - Berta Bonet
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, B15 2TT, Birmingham, United Kingdom
| | - Aaron I Packman
- Department of Civil and Environmental Engineering, Northwestern Center for Water Research, Northwestern University, Evanston, Chicago, United States
| | - Jon Sadler
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, B15 2TT, Birmingham, United Kingdom
| | - Valentyna Inshyna
- Department of Biology II, Ludwig-Maximilians-University Munich, 82152, Planegg-Martinsried, Germany
| | - Steve Allen
- Strathclyde University, Glasgow, United Kingdom
| | | | - Laurent Simon
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR5023, Ecologie des Hydrosystèmes Naturels et Anthropisés (LEHNA), 69622, Villeurbanne, France
| | - Florian Mermillod-Blondin
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR5023, Ecologie des Hydrosystèmes Naturels et Anthropisés (LEHNA), 69622, Villeurbanne, France
| | - Iseult Lynch
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, B15 2TT, Birmingham, United Kingdom
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Delbaere A, Younes T, Chauvin M, Simon L, Khamphan C, Vieillevigne L. PD-0187: Converting absorbed dose-to-medium to dose-to-water in heterogeneous media. Radiother Oncol 2020. [DOI: 10.1016/s0167-8140(21)00211-5] [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]
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Wittmann B, Wiesneth S, Motamen S, Simon L, Serein-Spirau F, Reiter G, Hildner R. Energy transport and light propagation mechanisms in organic single crystals. J Chem Phys 2020; 153:144202. [PMID: 33086831 DOI: 10.1063/5.0019832] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Unambiguous information about spatiotemporal exciton dynamics in three-dimensional nanometer- to micrometer-sized organic structures is difficult to obtain experimentally. Exciton dynamics can be modified by annihilation processes, and different light propagation mechanisms can take place, such as active waveguiding and photon recycling. Since these various processes and mechanisms can lead to similar spectroscopic and microscopic signatures on comparable time scales, their discrimination is highly demanding. Here, we study individual organic single crystals grown from thiophene-based oligomers. We use time-resolved detection-beam scanning microscopy to excite a local singlet exciton population and monitor the subsequent broadening of the photoluminescence (PL) signal in space and on pico- to nanosecond time scales. Combined with Monte Carlo simulations, we were able to exclude photon recycling for our system, whereas leakage radiation upon active waveguiding leads to an apparent PL broadening of about 20% compared to the initial excitation profile. Exciton-exciton annihilation becomes important at high excitation fluence and apparently accelerates the exciton dynamics leading to apparently increased diffusion lengths. At low excitation fluences, the spatiotemporal PL broadening results from singlet exciton diffusion with diffusion lengths of up to 210 nm. Surprisingly, even in structurally highly ordered single crystals, the transport dynamics is subdiffusive and shows variations between different crystals, which we relate to varying degrees of static and dynamic electronic disorders.
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Affiliation(s)
- Bernd Wittmann
- Spectroscopy of Soft Matter, University of Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany
| | - Stephan Wiesneth
- Spectroscopy of Soft Matter, University of Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany
| | - Sajedeh Motamen
- Institute of Physics, University of Freiburg, Hermann-Herder-Straße 3, 79104 Freiburg, Germany
| | - Laurent Simon
- Université de Strasbourg (UdS)-Université de Haute Alsace (UHA), Institut de Science des Matériaux de Mulhouse (IS2M), UMR 7361-CNRS, 3bis rue Alfred Werner, 68093 Mulhouse, France
| | - Françoise Serein-Spirau
- Institut Charles Gerhardt de Montpellier, Université de Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier, UMR 5353-CNRS, Equipe Architectures Moleculaires et Materiaux Nanostructures (AM2N), 8 Rue de l'Ecole Normale, 34090 Montpellier Cedex 05, France
| | - Günter Reiter
- Institute of Physics, University of Freiburg, Hermann-Herder-Straße 3, 79104 Freiburg, Germany
| | - Richard Hildner
- Spectroscopy of Soft Matter, University of Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany
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Willekens C, Rahme R, Duchmann M, Vidal V, Saada V, Broutin S, Delahousse J, Renneville A, Marceau A, Clappier E, Uzunov M, Rossignol J, Pascal L, Simon L, Micol JB, Pasquier F, Raffoux E, Preudhomme C, Quivoron C, Itzykson R, Penard-Lacronique V, Paci A, Fenaux P, Attar EC, Frattini M, Braun T, Ades L, De Botton S. Effects of azacitidine in 93 patients with IDH1/2 mutated acute myeloid leukemia/myelodysplastic syndromes: a French retrospective multicenter study. Leuk Lymphoma 2020; 62:438-445. [PMID: 33043739 DOI: 10.1080/10428194.2020.1832661] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Isocitrate dehydrogenase 1 (IDH1) and 2 (IDH2) mutations in Myeloid Neoplams (MNs) exhibit DNA hypermethylation via 2-hydroxyglutarate (2HG) over-production. Clinical impact of azacitidine (AZA) remains inconsistent in IDH1/2-mutated MNs and the potential of serum 2HG as a suitable marker of response to AZA is unknown. To address these questions, we retrospectively analyzed 93 MNs patients (78 AML, 11 MDS, 4 CMML) with IDH1/2 mutations treated with AZA. After a median of 5 cycles of AZA, overall response rate was 28% (including 15% complete remission) and median OS was 12.3 months (significantly shorter in AML compared to MDS/CMML patients). In multivariate analysis of AML patients, DNMT3A mutation was associated with shorter OS while IDH1/2 mutation subtypes had no independent impact. No difference was observed in serum 2HG levels upon AZA treatment between responding and refractory patients suggesting that serum 2HG cannot be used as a surrogate marker of AZA response.
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Affiliation(s)
- C Willekens
- Département d'Hématologie, Gustave Roussy, Université Paris-Saclay, Villejuif, France.,Inserm U1170, Gustave Roussy, Université Paris-Saclay, Villejuif, France
| | - R Rahme
- Département d'Hématologie, Hôpital Saint-Louis, Assistance Publique-Hôpitaux de Paris, Paris, France.,Université Paris Diderot, Paris, France.,Inserm U944, Hôpital Saint-Louis, Paris, France
| | - M Duchmann
- Laboratoire d'Hématologie, Hôpital Saint-Louis, Assistance Publique-Hôpitaux de Paris, Université Paris Diderot, Paris, France
| | - V Vidal
- Département d'Hématologie, Hôpital Avicenne, Assistance Publique-Hôpitaux de Paris, Bobigny, France
| | - V Saada
- Département de Biologie et Pathologie médicales, Gustave Roussy, Université Paris-Saclay, Villejuif, France
| | - S Broutin
- Département de Biologie et Pathologie médicales, Gustave Roussy, Université Paris-Saclay, Villejuif, France
| | - J Delahousse
- Département de Biologie et Pathologie médicales, Gustave Roussy, Université Paris-Saclay, Villejuif, France
| | - A Renneville
- Centre de Biologie-Pathologie, Laboratoire d'hématologie, Centre Hospitalier Universitaire de Lille, France
| | - A Marceau
- Centre de Biologie-Pathologie, Laboratoire d'hématologie, Centre Hospitalier Universitaire de Lille, France
| | - E Clappier
- Laboratoire d'Hématologie, Hôpital Saint-Louis, Assistance Publique-Hôpitaux de Paris, Université Paris Diderot, Paris, France
| | - M Uzunov
- Département d'Hématologie, Hôpital Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - J Rossignol
- Département d'Hématologie, Gustave Roussy, Université Paris-Saclay, Villejuif, France.,Département d'Hématologie, Hôpital Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - L Pascal
- Hématologie, Groupement des Hôpitaux de l'Institut Catholique de Lille, Lille, France
| | - L Simon
- Département d'Hématologie, Hôpital universitaire d'Amiens - Picardie, Amiens, France
| | - J B Micol
- Département d'Hématologie, Gustave Roussy, Université Paris-Saclay, Villejuif, France.,Inserm U1170, Gustave Roussy, Université Paris-Saclay, Villejuif, France
| | - F Pasquier
- Département d'Hématologie, Gustave Roussy, Université Paris-Saclay, Villejuif, France.,Inserm U1170, Gustave Roussy, Université Paris-Saclay, Villejuif, France
| | - E Raffoux
- Département d'Hématologie, Hôpital Saint-Louis, Assistance Publique-Hôpitaux de Paris, Paris, France.,Université Paris Diderot, Paris, France.,Inserm U944, Hôpital Saint-Louis, Paris, France
| | - C Preudhomme
- Centre de Biologie-Pathologie, Laboratoire d'hématologie, Centre Hospitalier Universitaire de Lille, France
| | - C Quivoron
- Inserm U1170, Gustave Roussy, Université Paris-Saclay, Villejuif, France
| | - R Itzykson
- Département d'Hématologie, Hôpital Saint-Louis, Assistance Publique-Hôpitaux de Paris, Paris, France.,Université Paris Diderot, Paris, France.,Inserm U944, Hôpital Saint-Louis, Paris, France
| | | | - A Paci
- Département de Biologie et Pathologie médicales, Gustave Roussy, Université Paris-Saclay, Villejuif, France
| | - P Fenaux
- Département d'Hématologie, Hôpital Saint-Louis, Assistance Publique-Hôpitaux de Paris, Paris, France.,Université Paris Diderot, Paris, France.,Inserm U944, Hôpital Saint-Louis, Paris, France
| | - E C Attar
- Agios Pharmaceuticals, Inc, Cambridge, MA, USA
| | | | - T Braun
- Département d'Hématologie, Hôpital Avicenne, Assistance Publique-Hôpitaux de Paris, Bobigny, France
| | - L Ades
- Département d'Hématologie, Hôpital Saint-Louis, Assistance Publique-Hôpitaux de Paris, Paris, France.,Université Paris Diderot, Paris, France.,Inserm U944, Hôpital Saint-Louis, Paris, France
| | - S De Botton
- Département d'Hématologie, Gustave Roussy, Université Paris-Saclay, Villejuif, France.,Inserm U1170, Gustave Roussy, Université Paris-Saclay, Villejuif, France
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Blum A, Gillet R, Rauch A, Urbaneja A, Biouichi H, Dodin G, Germain E, Lombard C, Jaquet P, Louis M, Simon L, Gondim Teixeira P. 3D reconstructions, 4D imaging and postprocessing with CT in musculoskeletal disorders: Past, present and future. Diagn Interv Imaging 2020; 101:693-705. [PMID: 33036947 DOI: 10.1016/j.diii.2020.09.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 09/12/2020] [Accepted: 09/15/2020] [Indexed: 12/30/2022]
Abstract
Three-dimensional (3D) imaging and post processing are common tasks used daily in many disciplines. The purpose of this article is to review the new postprocessing tools available. Although 3D imaging can be applied to all anatomical regions and used with all imaging techniques, its most varied and relevant applications are found with computed tomography (CT) data in musculoskeletal imaging. These new applications include global illumination rendering (GIR), unfolded rib reformations, subtracted CT angiography for bone analysis, dynamic studies, temporal subtraction and image fusion. In all of these tasks, registration and segmentation are two basic processes that affect the quality of the results. GIR simulates the complete interaction of photons with the scanned object, providing photorealistic volume rendering. Reformations to unfold the rib cage allow more accurate and faster diagnosis of rib lesions. Dynamic CT can be applied to cinematic joint evaluations a well as to perfusion and angiographic studies. Finally, more traditional techniques, such as minimum intensity projection, might find new applications for bone evaluation with the advent of ultra-high-resolution CT scanners. These tools can be used synergistically to provide morphologic, topographic and functional information and increase the versatility of CT.
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Affiliation(s)
- A Blum
- Guilloz Imaging Department, CHRU of Nancy, 54000 Nancy, France; Unité INSERM U1254 Imagerie Adaptative Diagnostique et Interventionnelle (IADI), CHRU of Nancy, 54511 Vandœuvre-lès-Nancy, France.
| | - R Gillet
- Guilloz Imaging Department, CHRU of Nancy, 54000 Nancy, France
| | - A Rauch
- Guilloz Imaging Department, CHRU of Nancy, 54000 Nancy, France
| | - A Urbaneja
- Guilloz Imaging Department, CHRU of Nancy, 54000 Nancy, France
| | - H Biouichi
- Guilloz Imaging Department, CHRU of Nancy, 54000 Nancy, France
| | - G Dodin
- Guilloz Imaging Department, CHRU of Nancy, 54000 Nancy, France
| | - E Germain
- Guilloz Imaging Department, CHRU of Nancy, 54000 Nancy, France
| | - C Lombard
- Guilloz Imaging Department, CHRU of Nancy, 54000 Nancy, France
| | - P Jaquet
- Guilloz Imaging Department, CHRU of Nancy, 54000 Nancy, France
| | - M Louis
- Guilloz Imaging Department, CHRU of Nancy, 54000 Nancy, France
| | - L Simon
- Guilloz Imaging Department, CHRU of Nancy, 54000 Nancy, France
| | - P Gondim Teixeira
- Guilloz Imaging Department, CHRU of Nancy, 54000 Nancy, France; Unité INSERM U1254 Imagerie Adaptative Diagnostique et Interventionnelle (IADI), CHRU of Nancy, 54511 Vandœuvre-lès-Nancy, France
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47
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Goglio-Primard K, Simon L, Cohendet P, Aharonson BS, Wenger-Trayner E. Managing with communities for innovation, agility, and resilience. Eur Manag J 2020; 38:673-675. [PMID: 38620627 PMCID: PMC7495186 DOI: 10.1016/j.emj.2020.08.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/28/2023]
Affiliation(s)
| | | | | | | | - Etienne Wenger-Trayner
- Social Learning Theorist and Consultant, California
- Social Learning Theorist and Consultant, Portugal
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48
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Lieutier-Colas F, Hasseine L, Machouart M, Vannini M, Emery S, Meyer F, Demoré B, Charmillon A, Simon L, Rabaud C. Fongémies à Candida spp : épidémiologie, sensibilité aux antifongiques et consommations d’antifongiques dans deux CHU français de 2015 à 2018. Med Mal Infect 2020. [DOI: 10.1016/j.medmal.2020.06.337] [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: 11/28/2022]
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49
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Dumartin C, Pefau M, Jouzeau A, Dugravot L, Rabaud C, Ali-Brandmeyer O, Reyreaud E, Rogues A, Lieutier-Colas F, Simon L. Consommations d’antibiotiques à large spectre par spécialités cliniques dans 1630 hôpitaux français en 2018. Med Mal Infect 2020. [DOI: 10.1016/j.medmal.2020.06.084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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50
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Lieutier-Colas F, Jouzeau A, Dugravot L, Dumartin C, Martin C, Chabaud A, Charmillon A, Lefebvre N, Rabaud C, Simon L. Consommations d’antibiotiques anti-staphylococciques et résistance bactérienne dans les hôpitaux de la région Grand Est de 2014 à 2018 : la résistance est-elle le seul motif de la prescription ? Med Mal Infect 2020. [DOI: 10.1016/j.medmal.2020.06.085] [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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