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Feuzing F, Mbakidi JP, Pontoire B, Quéveau D, Roelens G, Lourdin D, Bouquillon S, Leroy E. Melt processing of paramylon using a water:ionic liquid mixture as plasticizer. Carbohydr Polym 2023; 306:120607. [PMID: 36746572 DOI: 10.1016/j.carbpol.2023.120607] [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: 09/20/2022] [Revised: 01/13/2023] [Accepted: 01/17/2023] [Indexed: 01/21/2023]
Abstract
Paramylon is a linear β-1,3-glucan produced by the microalgae Euglena Gracilis. Due to its native crystalline structure, involving hexagonally packed triple helices, paramylon is neither water soluble nor thermoplastic. While such properties are generally obtained by chemical modification of paramylon, the present work demonstrates that using ionic liquid/water mixtures as solvents or plasticizers may be an alternative: A mixture of water with cholinium glycinate (40:60) allowed: i) obtaining paramylon solutions at 80 °C, that form reversible ionogels upon cooling at 20 °C, when used as a solvent, and ii) the thermomechanical processing of paramylon below 100 °C by extrusion and hot-press into transparent films, when used as a plasticizer. The thermoplastic paramylon obtained consists of an amorphous matrix, self-reinforced by oriented triple helices packed as nanofibers. This results in a storage modulus ranging from 300 to 450 MPa at 25 °C, depending on the plasticizer content, and in a tensile strain at break of 27 %. For storage times larger than 1 month, a recrystallization of paramylon is observed, with an unidentified crystalline structure different from the native one. Recrystallized samples can be reprocessed into amorphous films by hot pressing.
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Affiliation(s)
- Frédérica Feuzing
- Université de Nantes, Oniris, CNRS, GEPEA, UMR 6144, F- 44470 Carquefou, France; Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, Université de Reims Champagne-Ardenne, BP 1039, 51687 Reims Cedex, France
| | - Jean Pierre Mbakidi
- Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, Université de Reims Champagne-Ardenne, BP 1039, 51687 Reims Cedex, France
| | - Bruno Pontoire
- Biopolymers Interactions Assemblies Research Unit 1268 (BIA), INRAE, Rue de la Géraudière, 44316 Nantes, France
| | - Delphine Quéveau
- Université de Nantes, Oniris, CNRS, GEPEA, UMR 6144, F- 44470 Carquefou, France
| | - Guillaume Roelens
- Université de Nantes, Oniris, CNRS, GEPEA, UMR 6144, F- 44470 Carquefou, France
| | - Denis Lourdin
- Biopolymers Interactions Assemblies Research Unit 1268 (BIA), INRAE, Rue de la Géraudière, 44316 Nantes, France
| | - Sandrine Bouquillon
- Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, Université de Reims Champagne-Ardenne, BP 1039, 51687 Reims Cedex, France
| | - Eric Leroy
- Université de Nantes, Oniris, CNRS, GEPEA, UMR 6144, F- 44470 Carquefou, France.
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2
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Li K, Yu Z, Dovgaliuk I, Le Coeur C, Lütz-Bueno V, Leroy E, Brissault B, de Rancourt de Mimerand Y, Lepoitevin M, Serre C, Penelle J, Couturaud B. Polymer-metal-organic framework self-assembly (PMOFSA) as a robust one-step method to generate well-dispersed hybrid nanoparticles in water. Chem Commun (Camb) 2023; 59:4923-4926. [PMID: 37010849 DOI: 10.1039/d2cc06088d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2023]
Abstract
A new process, PMOFSA, is described here, that opens the way for the one-pot straightforward and versatile manufacture of polymer-MOF nanoparticles in water. It can be expected that this study will not only expand the scope of in situ preparation of polymer-MOF nano-objects but also inspire researchers in the field to prepare a new generation of polymer-MOF hybrid materials.
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Affiliation(s)
- Kun Li
- Univ Paris Est Créteil, ICMPE, UMR 7182, 2-8 rue H. Dunant, F-94320, Thiais, France.
- CNRS, Institut de Chimie et des Matériaux Paris-Est (East Paris Institute of Chemistry & Materials Science), 2-8 rue H. Dunant, F-94320, Thiais, France
| | - Zhihao Yu
- Institut des Matériaux Poreux de Paris, ENS, ESPCI Paris, CNRS, Université PSL, 75005, Paris, France
| | - Iurii Dovgaliuk
- Institut des Matériaux Poreux de Paris, ENS, ESPCI Paris, CNRS, Université PSL, 75005, Paris, France
| | - Clémence Le Coeur
- Univ Paris Est Créteil, ICMPE, UMR 7182, 2-8 rue H. Dunant, F-94320, Thiais, France.
- CNRS, Institut de Chimie et des Matériaux Paris-Est (East Paris Institute of Chemistry & Materials Science), 2-8 rue H. Dunant, F-94320, Thiais, France
- Laboratoire Léon Brillouin, CEA-CNRS (UMR-12), CEA Saclay, Université Paris-Saclay, 91191, Gif-sur-Yvette Cedex, France
| | - Viviane Lütz-Bueno
- Laboratoire Léon Brillouin, CEA-CNRS (UMR-12), CEA Saclay, Université Paris-Saclay, 91191, Gif-sur-Yvette Cedex, France
- Paul Scherrer Institute, Forschungsstrasse 111, 5232, Villigen PSI, Switzerland
| | - Eric Leroy
- Univ Paris Est Créteil, ICMPE, UMR 7182, 2-8 rue H. Dunant, F-94320, Thiais, France.
- CNRS, Institut de Chimie et des Matériaux Paris-Est (East Paris Institute of Chemistry & Materials Science), 2-8 rue H. Dunant, F-94320, Thiais, France
| | - Blandine Brissault
- Univ Paris Est Créteil, ICMPE, UMR 7182, 2-8 rue H. Dunant, F-94320, Thiais, France.
- CNRS, Institut de Chimie et des Matériaux Paris-Est (East Paris Institute of Chemistry & Materials Science), 2-8 rue H. Dunant, F-94320, Thiais, France
| | - Yoann de Rancourt de Mimerand
- Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Wuhan, 430205, China
| | - Mathilde Lepoitevin
- Institut des Matériaux Poreux de Paris, ENS, ESPCI Paris, CNRS, Université PSL, 75005, Paris, France
| | - Christian Serre
- Institut des Matériaux Poreux de Paris, ENS, ESPCI Paris, CNRS, Université PSL, 75005, Paris, France
| | - Jacques Penelle
- Univ Paris Est Créteil, ICMPE, UMR 7182, 2-8 rue H. Dunant, F-94320, Thiais, France.
- CNRS, Institut de Chimie et des Matériaux Paris-Est (East Paris Institute of Chemistry & Materials Science), 2-8 rue H. Dunant, F-94320, Thiais, France
| | - Benoit Couturaud
- Univ Paris Est Créteil, ICMPE, UMR 7182, 2-8 rue H. Dunant, F-94320, Thiais, France.
- CNRS, Institut de Chimie et des Matériaux Paris-Est (East Paris Institute of Chemistry & Materials Science), 2-8 rue H. Dunant, F-94320, Thiais, France
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Catry C, Lourdin D, Roelens G, Nguyen GT, Vidal F, Plesse C, Leroy E. Electroactive trilayer actuators taking advantage of the ionic conductivity and self-adhesion of ionic liquid plasticized starch. Carbohydrate Polymer Technologies and Applications 2023. [DOI: 10.1016/j.carpta.2023.100295] [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: 02/18/2023] Open
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Feuzing F, Mbakidi JP, Lazar F, Marchal L, Leroy E, Bouquillon S. Biobased Ionic liquids as Solvents of Paramylon. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120983] [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: 12/12/2022]
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Feuzing F, Mbakidi JP, Marchal L, Bouquillon S, Leroy E. A review of paramylon processing routes from microalga biomass to non-derivatized and chemically modified products. Carbohydr Polym 2022; 288:119181. [PMID: 35450615 DOI: 10.1016/j.carbpol.2022.119181] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [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: 09/10/2021] [Revised: 01/04/2022] [Accepted: 01/21/2022] [Indexed: 11/02/2022]
Abstract
Paramylon is a linear β-1,3-glucan, similar to curdlan, produced as intracellular granules by the microalga Euglena gracilis, a highly versatile and robust strain, able to grow under various trophic conditions, with valorization of CO2, wastewaters, or food byproducts as nutrients. This review focuses in particular on the various processing routes leading to new potential paramylon based products. Due to its crystalline structure, involving triple helices stabilized by internal intermolecular hydrogen bonds, paramylon is neither water-soluble nor thermoplastic. The few solvents able to disrupt the triple helices, and to fully solubilize the polymer as random coils, allow non derivatizing shaping into films, fibers, and even nanofibers by a specific self-assembly mechanism. Chemical modification in homogeneous or heterogeneous conditions is also possible. The non-selective or regioselective substitution of the hydroxyl groups of glucosidic units leads to water-soluble ionic derivatives and thermoplastic paramylon esters with foreseen applications ranging from health to bioplastics.
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Affiliation(s)
- Frédérica Feuzing
- Université de Nantes, Oniris, CNRS, GEPEA, UMR 6144, F- 44470 Carquefou, France; Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, Université de Reims Champagne-Ardenne, BP 1039, 51687 Reims Cedex, France
| | - Jean Pierre Mbakidi
- Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, Université de Reims Champagne-Ardenne, BP 1039, 51687 Reims Cedex, France
| | - Luc Marchal
- Université de Nantes, Oniris, CNRS, GEPEA, UMR 6144, F- 44470 Carquefou, France
| | - Sandrine Bouquillon
- Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, Université de Reims Champagne-Ardenne, BP 1039, 51687 Reims Cedex, France
| | - Eric Leroy
- Université de Nantes, Oniris, CNRS, GEPEA, UMR 6144, F- 44470 Carquefou, France.
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6
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Li J, Liu P, Menguy N, Benzerara K, Bai J, Zhao X, Leroy E, Zhang C, Zhang H, Liu J, Zhang R, Zhu K, Roberts AP, Pan Y. Identification of sulfate-reducing magnetotactic bacteria via a group-specific 16S rDNA primer and correlative fluorescence and electron microscopy: strategy for culture-independent study. Environ Microbiol 2022; 24:5019-5038. [PMID: 35726890 DOI: 10.1111/1462-2920.16109] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 06/02/2022] [Accepted: 06/18/2022] [Indexed: 11/28/2022]
Abstract
Magnetotactic bacteria (MTB) biomineralize intracellular magnetic nanocrystals and swim along geomagnetic field lines. While few axenic MTB cultures exist, living cells can be separated magnetically from natural environments for analysis. The bacterial universal 27F/1492R primer pair has been used widely to amplify nearly full-length 16S rRNA genes and to provide phylogenetic portraits of MTB communities. However, incomplete coverage and amplification biases inevitably prevent detection of some phylogenetically specific or non-abundant MTB. Here, we propose a new formulation of the upstream 390F primer that we combined with the downstream 1492R primer to specifically amplify 1,100-bp 16S rRNA gene sequences of sulfate-reducing MTB in freshwater sediments from Lake Weiyanghu, Xi'an, northwestern China. With correlative fluorescence in situ hybridization and scanning/transmission electron microscopy, three novel MTB strains (WYHR-2, WYHR-3, and WYHR-4) from the Desulfobacterota phylum were identified phylogenetically and structurally at the single cell level. Strain WYHR-2 produces bullet-shaped magnetosome magnetite, while the other two strains produce both cubic/prismatic greigite and bullet-shaped magnetite. Our results expand knowledge of bacterial diversity and magnetosome biomineralization of sulfate-reducing MTB. We also propose a general strategy for identifying and characterizing uncultured MTB from natural environments. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Jinhua Li
- Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, China.,Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.,College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Peiyu Liu
- Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, China.,Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.,Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai, China.,College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Nicolas Menguy
- Sorbonne Université, UMR CNRS 7590, MNHN, IRD, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, IMPMC, Paris, France
| | - Karim Benzerara
- Sorbonne Université, UMR CNRS 7590, MNHN, IRD, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, IMPMC, Paris, France
| | - Jinling Bai
- Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, China.,Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.,Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai, China
| | - Xiang Zhao
- Research School of Earth Sciences, Australian National University, Canberra, ACT, Australia
| | - Eric Leroy
- ICMPE, University Paris East, UMR 7182, CNRS, 2-8 rue Henri Dunant, Thiais Cedex, France
| | - Chaoqun Zhang
- Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, China.,Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.,Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai, China
| | - Heng Zhang
- Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, China.,Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.,Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai, China
| | - Jiawei Liu
- Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, China.,Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.,College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Rongrong Zhang
- Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, China.,Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.,Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai, China
| | - Keilei Zhu
- Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, China.,Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.,Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai, China.,College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Andrew P Roberts
- Research School of Earth Sciences, Australian National University, Canberra, ACT, Australia
| | - Yongxin Pan
- Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, China.,Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.,College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China
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7
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Li J, Liu P, Menguy N, Zhang X, Wang J, Benzerara K, Feng L, Sun L, Zheng Y, Meng F, Gu L, Leroy E, Hao J, Chu X, Pan Y. Intracellular silicification by early-branching magnetotactic bacteria. Sci Adv 2022; 8:eabn6045. [PMID: 35559677 PMCID: PMC9106300 DOI: 10.1126/sciadv.abn6045] [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] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 03/31/2022] [Indexed: 06/13/2023]
Abstract
Biosilicification-the formation of biological structures composed of silica-has a wide distribution among eukaryotes; it plays a major role in global biogeochemical cycles, and has driven the decline of dissolved silicon in the oceans through geological time. While it has long been thought that eukaryotes are the only organisms appreciably affecting the biogeochemical cycling of Si, the recent discoveries of silica transporter genes and marked silicon accumulation in bacteria suggest that prokaryotes may play an underappreciated role in the Si cycle, particularly in ancient times. Here, we report a previously unidentified magnetotactic bacterium that forms intracellular, amorphous silica globules. This bacterium, phylogenetically affiliated with the phylum Nitrospirota, belongs to a deep-branching group of magnetotactic bacteria that also forms intracellular magnetite magnetosomes and sulfur inclusions. This contribution reveals intracellularly controlled silicification within prokaryotes and suggests a previously unrecognized influence on the biogeochemical Si cycle that was operational during early Earth history.
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Affiliation(s)
- Jinhua Li
- Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Innovation Academy for Earth Sciences, Chinese Academy of Sciences, Beijing 100029, China
- Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061, China
- College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Peiyu Liu
- Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Innovation Academy for Earth Sciences, Chinese Academy of Sciences, Beijing 100029, China
- Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061, China
- College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
- Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai 519082, China
| | - Nicolas Menguy
- Sorbonne Université, UMR CNRS 7590, MNHN, IRD, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), 75005 Paris, France
| | - Xingliang Zhang
- State Key Laboratory of Continental Dynamics, Shaanxi Key Laboratory of Early Life and Environments and Department of Geology, Northwest University, Xi’an 710069, China
| | - Jian Wang
- Canadian Light Source Inc., University of Saskatchewan, Saskatoon, SK S7N 2V3, Canada
| | - Karim Benzerara
- Sorbonne Université, UMR CNRS 7590, MNHN, IRD, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), 75005 Paris, France
| | - Lianjun Feng
- Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Innovation Academy for Earth Sciences, Chinese Academy of Sciences, Beijing 100029, China
- College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lei Sun
- Center for Biological Imaging, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Chaoyang District, Beijing 100101, China
| | - Yue Zheng
- State Key Laboratory of Marine Environmental Science, College of the Environment and Ecology, Xiamen University, Xiamen, 361102, China
| | - Fanqi Meng
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Lin Gu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Eric Leroy
- ICMPE, University Paris East, UMR 7182, CNRS, 2-8 Rue Henri Dunant, Thiais, Cedex 94320, France
| | - Jialong Hao
- Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Innovation Academy for Earth Sciences, Chinese Academy of Sciences, Beijing 100029, China
- College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xuelei Chu
- Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Innovation Academy for Earth Sciences, Chinese Academy of Sciences, Beijing 100029, China
- College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yongxin Pan
- Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Innovation Academy for Earth Sciences, Chinese Academy of Sciences, Beijing 100029, China
- College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
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Rigourd V, Benoit L, Paugam C, Driessen M, Charlier C, Bille E, Pommeret B, Leroy E, Murmu MS, Guyonnet A, Baumot N, Seror JY. Management of lactating breast abscesses by ultrasound-guided needle aspiration and continuation of breastfeeding: A pilot study. J Gynecol Obstet Hum Reprod 2021; 51:102214. [PMID: 34469779 DOI: 10.1016/j.jogoh.2021.102214] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Revised: 06/21/2021] [Accepted: 08/27/2021] [Indexed: 11/27/2022]
Abstract
INTRODUCTION Needle aspiration of breast abscesses during lactation are currently recommended as an alternative to surgery only for moderate forms. In case of breast abscess, many patients stop breastfeeding on the advice of a health professional. We reviewed our experience of treatment of lactating breast abscesses by ultrasound-guided aspiration and suggest an algorithm of their management. We also analyzed the continuation of breastfeeding of these patients after advices from trained teams. MATERIEL AND METHODS We conducted a retrospective study from April 2016 to April 2017, including 28 patients referred for a breast abscess during lactation at the Duroc Breast Imaging Center. A management by ultrasound-guided aspiration was proposed to each patient. We collected data about the breastfeeding between October 2018 and January 2019. RESULTS A single aspiration was sufficient in 64.3% of cases. The delay between the occurrence of the abscess and the indication for drainage was significantly higher for patients who have needed finally surgical drainage (p = 0,0031). There were no difference of size of abscesses between patients receiving needle aspiration alone and those who have undergone surgery (p = 0,97). All patients who had been managed by needle aspiration continued breastfeeding after the treatment and 40% of the patients were still breastfeeding at 6 months. CONCLUSION The management of lactating breast abscess by ultrasound-guided needle aspiration is an effective alternative to surgery. It appears to be effective regardless of the size of the abscess and is compatible with the continuation of breastfeeding. Our study has indeed shown that if they are well advised, the majority of patients continue breastfeeding so that it is essential that health professionals be better trained regarding the management of breastfeeding complications.
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Affiliation(s)
- V Rigourd
- Lactarium Régional d'Ile-de-France, Necker Hôpital Enfants malades, 149 rue de Sèvres, Paris 75015, France; Réseau de Santé Périnatal Parisien, Paris, France.
| | - L Benoit
- Department of Obstetrics and Gynecology, Necker Hôpital Enfants malades, Paris, France
| | - C Paugam
- Réseau de Santé Périnatal Parisien, Paris, France
| | - M Driessen
- Department of Obstetrics and Gynecology, Necker Hôpital Enfants malades, Paris, France
| | - C Charlier
- Department of Obstetrics and Gynecology, Necker Hôpital Enfants malades, Paris, France
| | - E Bille
- Department of Microbiology, Necker Hôpital Enfants malades, Paris, France
| | - B Pommeret
- Department of Obstetrics and Gynecology, Lille, France
| | - E Leroy
- Department of Neonatology, Necker Hôpital Enfants malades, Paris, France
| | - M S Murmu
- Lactarium Régional d'Ile-de-France, Necker Hôpital Enfants malades, 149 rue de Sèvres, Paris 75015, France
| | - A Guyonnet
- Lactarium Régional d'Ile-de-France, Necker Hôpital Enfants malades, 149 rue de Sèvres, Paris 75015, France
| | - N Baumot
- Réseau de Santé Périnatal Parisien, Paris, France
| | - J Y Seror
- Department of Radiology, Duroc Breast Imaging Department, Paris, France
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9
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Brugère-Picoux J, Leroy E, Rosolen S, Angot JL, Buisson Y. [Covid-19 and the animal world, from a still mysterious origin towards an always unpredictable future]. Bull Acad Natl Med 2021; 205:879-890. [PMID: 34305142 PMCID: PMC8278875 DOI: 10.1016/j.banm.2021.07.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Bien que l’émergence de la Covid-19 en Chine n’ait pas été clairement élucidée, l’hypothèse d’une origine animale reste la plus probable. Elle est étayée par la présence de la chauve-souris fer à cheval suspectée d’être le progéniteur du SARS-CoV-2 et par la raréfaction de la viande de porc, due à la peste porcine africaine, détournant les consommateurs vers des animaux exotiques d’élevage vendus sur les marchés. Au cours de cette pandémie, plusieurs espèces animales ont été atteintes par le SARS-CoV-2. Des cas sporadiques ont d’abord été rapportés chez des animaux de compagnie (chiens et chats) contaminés par leurs propriétaires, puis des grands félins et des gorilles contaminés dans des zoos par leurs soigneurs. La transmission la plus importante de l’Homme à l’animal a eu lieu dans les élevages de visons, surtout aux Pays-Bas et au Danemark, nécessitant l’euthanasie de plusieurs millions d’animaux, les visons ayant, à leur tour, contaminé des hommes et des chats errants. L’étude des transmissions naturelles ou expérimentales du SARS-CoV-2 a permis d’identifier les espèces animales les plus réceptives : les visons d’Amérique et les chiens viverrins, et dans une moindre mesure les chats errants, qui pourraient devenir un réservoir animal en raison de leur sensibilité à ce virus et de leur prolificité. La Commission européenne a décidé le 17 mai 2021 de renforcer la surveillance des infections par le SARS-CoV-2 chez les visons et d’autres mustélidés, ainsi que chez des chiens viverrins, en soulignant que l’évaluation épidémiologique du risque que présente l’apparition du SARS-CoV-2 chez ces espèces sensibles était une priorité de santé publique.
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Affiliation(s)
- J Brugère-Picoux
- Académie nationale de médecine, 16, rue Bonaparte, 75006 Paris, France.,Académie vétérinaire de France, 34, rue Bréguet, 75011 Paris, France
| | - E Leroy
- Académie nationale de médecine, 16, rue Bonaparte, 75006 Paris, France.,Académie vétérinaire de France, 34, rue Bréguet, 75011 Paris, France
| | - S Rosolen
- Académie nationale de médecine, 16, rue Bonaparte, 75006 Paris, France.,Académie vétérinaire de France, 34, rue Bréguet, 75011 Paris, France
| | - J-L Angot
- Académie nationale de médecine, 16, rue Bonaparte, 75006 Paris, France.,Académie vétérinaire de France, 34, rue Bréguet, 75011 Paris, France
| | - Y Buisson
- Académie nationale de médecine, 16, rue Bonaparte, 75006 Paris, France.,Académie vétérinaire de France, 34, rue Bréguet, 75011 Paris, France
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10
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Guehenneux H, Geffroy C, Leroy E. [Source blocking in HDR brachytherapy: Practical situation and experience feedback at the Eugène Marquis-Rennes]. Cancer Radiother 2021; 25:648-649. [PMID: 34187715 DOI: 10.1016/j.canrad.2021.06.003] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Accepted: 06/04/2021] [Indexed: 11/15/2022]
Abstract
At the Eugene Marquis Center, high dose rate brachytherapy is part of the care offering. The risk analysis and the national experience feedback linked to the use of high activity sources show that blocking the source outside its storage position, during treatment, would be the main risk of exposure of ionizing radiation. In a process of radiation protection of patients and workers, and to limit the consequences of such an accident, the Eugene Marquis Center has set up periodic training with practical experience for all brachytherapy professionals. This article describes the experience feedback from this training by brachytherapy technicians.
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Affiliation(s)
- H Guehenneux
- Avenue de la Bataille Flandres-Dunkerque, 35000 Rennes, France.
| | - C Geffroy
- Avenue de la Bataille Flandres-Dunkerque, 35000 Rennes, France.
| | - E Leroy
- Avenue de la Bataille Flandres-Dunkerque, 35000 Rennes, France.
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11
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Mangombi JB, N’dilimabaka N, Lekana-Douki JB, Banga O, Maghendji-Nzondo S, Bourgarel M, Leroy E, Fenollar F, Mediannikov O. First investigation of pathogenic bacteria, protozoa and viruses in rodents and shrews in context of forest-savannah-urban areas interface in the city of Franceville (Gabon). PLoS One 2021; 16:e0248244. [PMID: 33684147 PMCID: PMC7939261 DOI: 10.1371/journal.pone.0248244] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Accepted: 02/23/2021] [Indexed: 12/29/2022] Open
Abstract
Rodents are reservoirs of numerous zoonotic diseases caused by bacteria, protozoans, or viruses. In Gabon, the circulation and maintenance of rodent-borne zoonotic infectious agents are poorly studied and are often limited to one type of pathogen. Among the three existing studies on this topic, two are focused on a zoonotic virus, and the third is focused on rodent Plasmodium. In this study, we searched for a wide range of bacteria, protozoa and viruses in different organs of rodents from the town of Franceville in Gabon. Samples from one hundred and ninety-eight (198) small mammals captured, including two invasive rodent species, five native rodent species and 19 shrews belonging to the Soricidae family, were screened. The investigated pathogens were bacteria from the Rickettsiaceae and Anaplasmataceae families, Mycoplasma spp., Bartonella spp., Borrelia spp., Orientia spp., Occidentia spp., Leptospira spp., Streptobacillus moniliformis, Coxiella burnetii, and Yersinia pestis; parasites from class Kinetoplastida spp. (Leishmania spp., Trypanosoma spp.), Piroplasmidae spp., and Toxoplasma gondii; and viruses from Paramyxoviridae, Hantaviridae, Flaviviridae and Mammarenavirus spp. We identified the following pathogenic bacteria: Anaplasma spp. (8.1%; 16/198), Bartonella spp. (6.6%; 13/198), Coxiella spp. (5.1%; 10/198) and Leptospira spp. (3.5%; 7/198); and protozoans: Piroplasma sp. (1%; 2/198), Toxoplasma gondii (0.5%; 1/198), and Trypanosoma sp. (7%; 14/198). None of the targeted viral genes were detected. These pathogens were found in Gabonese rodents, mainly Lophuromys sp., Lemniscomys striatus and Praomys sp. We also identified new genotypes: Candidatus Bartonella gabonensis and Uncultured Anaplasma spp. This study shows that rodents in Gabon harbor some human pathogenic bacteria and protozoans. It is necessary to determine whether the identified microorganisms are capable of undergoing zoonotic transmission from rodents to humans and if they may be responsible for human cases of febrile disease of unknown etiology in Gabon.
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Affiliation(s)
- Joa Braïthe Mangombi
- Centre Interdisciplinaire de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon
- Aix Marseille Univ, IRD, AP-HM, Microbes, VITROME, Marseille, France
- IHU Méditerranée Infection, Marseille, France
| | - Nadine N’dilimabaka
- Centre Interdisciplinaire de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon
- Département de Biologie, Faculté des sciences, Université des Sciences et Techniques de Masuku (USTM), Franceville, Gabon
| | - Jean-Bernard Lekana-Douki
- Centre Interdisciplinaire de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon
- Département de Parasitologie, Université des Sciences de la Santé (USS), Owendo, Libreville
| | - Octavie Banga
- Centre Interdisciplinaire de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon
| | - Sydney Maghendji-Nzondo
- Département Epidémiologie-Biostatistique et Informatique Médicale (DEBIM), Université des Sciences de la Santé (USS), Owendo, Libreville
| | - Mathieu Bourgarel
- CIRAD, UMR ASTRE, Harare, Zimbabwe
- ASTRE, Univ Montpellier, CIRAD, INRA, Montpellier, France
| | - Eric Leroy
- Centre Interdisciplinaire de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon
- UMR MIVEGEC IRD-CNRS-UM, IRD, Montpellier, France
| | - Florence Fenollar
- Aix Marseille Univ, IRD, AP-HM, Microbes, VITROME, Marseille, France
- IHU Méditerranée Infection, Marseille, France
| | - Oleg Mediannikov
- IHU Méditerranée Infection, Marseille, France
- Aix Marseille Univ, IRD, AP-HM, Microbes, MEPHI, Marseille, France
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12
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Azib T, Thaury C, Cuevas F, Leroy E, Jordy C, Marx N, Latroche M. Impact of Surface Chemistry of Silicon Nanoparticles on the Structural and Electrochemical Properties of Si/Ni 3.4Sn 4 Composite Anode for Li-Ion Batteries. Nanomaterials (Basel) 2020; 11:nano11010018. [PMID: 33374174 PMCID: PMC7823592 DOI: 10.3390/nano11010018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Revised: 12/19/2020] [Accepted: 12/22/2020] [Indexed: 11/28/2022]
Abstract
Embedding silicon nanoparticles in an intermetallic matrix is a promising strategy to produce remarkable bulk anode materials for lithium-ion (Li-ion) batteries with low potential, high electrochemical capacity and good cycling stability. These composite materials can be synthetized at a large scale using mechanical milling. However, for Si-Ni3Sn4 composites, milling also induces a chemical reaction between the two components leading to the formation of free Sn and NiSi2, which is detrimental to the performance of the electrode. To prevent this reaction, a modification of the surface chemistry of the silicon has been undertaken. Si nanoparticles coated with a surface layer of either carbon or oxide were used instead of pure silicon. The influence of the coating on the composition, (micro)structure and electrochemical properties of Si-Ni3Sn4 composites is studied and compared with that of pure Si. Si coating strongly reduces the reaction between Si and Ni3Sn4 during milling. Moreover, contrary to pure silicon, Si-coated composites have a plate-like morphology in which the surface-modified silicon particles are surrounded by a nanostructured, Ni3Sn4-based matrix leading to smooth potential profiles during electrochemical cycling. The chemical homogeneity of the matrix is more uniform for carbon-coated than for oxygen-coated silicon. As a consequence, different electrochemical behaviors are obtained depending on the surface chemistry, with better lithiation properties for the carbon-covered silicon able to deliver over 500 mAh/g for at least 400 cycles.
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Affiliation(s)
- Tahar Azib
- Univ Paris Est Creteil, CNRS, ICMPE, UMR 7182, 2 rue Henri Dunant, 94320 Thiais, France; (T.A.); (C.T.); (E.L.); (M.L.)
| | - Claire Thaury
- Univ Paris Est Creteil, CNRS, ICMPE, UMR 7182, 2 rue Henri Dunant, 94320 Thiais, France; (T.A.); (C.T.); (E.L.); (M.L.)
- SAFT Batteries, 113 Bd. Alfred Daney, 33074 Bordeaux, France;
| | - Fermin Cuevas
- Univ Paris Est Creteil, CNRS, ICMPE, UMR 7182, 2 rue Henri Dunant, 94320 Thiais, France; (T.A.); (C.T.); (E.L.); (M.L.)
- Correspondence:
| | - Eric Leroy
- Univ Paris Est Creteil, CNRS, ICMPE, UMR 7182, 2 rue Henri Dunant, 94320 Thiais, France; (T.A.); (C.T.); (E.L.); (M.L.)
| | - Christian Jordy
- SAFT Batteries, 113 Bd. Alfred Daney, 33074 Bordeaux, France;
| | - Nicolas Marx
- Umicore, Watertorenstraat 33, 2250 Olen, Belgium;
| | - Michel Latroche
- Univ Paris Est Creteil, CNRS, ICMPE, UMR 7182, 2 rue Henri Dunant, 94320 Thiais, France; (T.A.); (C.T.); (E.L.); (M.L.)
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Abstract
An association between malaria and risk for death among patients with Ebola virus disease has suggested within-host interactions between Plasmodium falciparum parasites and Ebola virus. To determine whether such an interaction might also influence the probability of acquiring either infection, we used a large snapshot surveillance study from rural Gabon to test if past exposure to Ebola virus is associated with current infection with Plasmodium spp. during nonepidemic conditions. We found a strong positive association, on population and individual levels, between seropositivity for antibodies against Ebola virus and the presence of Plasmodium parasites in the blood. According to a multiple regression model accounting for other key variables, antibodies against Ebola virus emerged as the strongest individual-level risk factor for acquiring malaria. Our results suggest that within-host interactions between malaria parasites and Ebola virus may underlie epidemiologic associations.
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Chaunier L, Viau L, Falourd X, Lourdin D, Leroy E. A drug delivery system obtained by hot-melt processing of zein plasticized by a pharmaceutically active ionic liquid. J Mater Chem B 2020; 8:4672-4679. [DOI: 10.1039/d0tb00326c] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Zein is extruded with [Lidocainium][Ibuprofenate] to obtain an amorphous drug delivery system.
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Affiliation(s)
| | - Lydie Viau
- Institut UTINAM
- UMR CNRS 6213
- Univ. Bourgogne Franche-Comté
- Besançon
- France
| | | | | | - Eric Leroy
- Université de Nantes
- Oniris
- CNRS
- GEPEA
- UMR 6144
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15
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Morlet E, Costemale-Lacoste JF, Poulet E, McMahon K, Hoertel N, Limosin F, Alezrah C, Amado I, Amar G, Andréi O, Arbault D, Archambault G, Aurifeuille G, Barrière S, Béra-Potelle C, Blumenstock Y, Bardou H, Bareil-Guérin M, Barrau P, Barrouillet C, Baup E, Bazin N, Beaufils B, Ben Ayed J, Benoit M, Benyacoub K, Bichet T, Blanadet F, Blanc O, Blanc-Comiti J, Boussiron D, Bouysse AM, Brochard A, Brochart O, Bucheron B, Cabot M, Camus V, Chabannes JM, Charlot V, Charpeaud T, Clad-Mor C, Combes C, Comisu M, Cordier B, Costi F, Courcelles JP, Creixell M, Cuche H, Cuervo-Lombard C, Dammak A, Da Rin D, Denis JB, Denizot H, Deperthuis A, Diers E, Dirami S, Donneau D, Dreano P, Dubertret C, Duprat E, Duthoit D, Fernandez C, Fonfrede P, Freitas N, Gasnier P, Gauillard J, Getten F, Gierski F, Godart F, Gourevitch R, Grassin Delyle A, Gremion J, Gres H, Griner V, Guerin-Langlois C, Guggiari C, Guillin O, Hadaoui H, Haffen E, Hanon C, Haouzir S, Hazif-Thomas C, Heron A, Hubsch B, Jalenques I, Januel D, Kaladjian A, Karnycheff JF, Kebir O, Krebs MO, Lajugie C, Leboyer M, Legrand P, Lejoyeux M, Lemaire V, Leroy E, Levy-Chavagnat D, Leydier A, Liling C, Llorca PM, Loeffel P, Louville P, Lucas Navarro S, Mages N, Mahi M, Maillet O, Manetti A, Martelli C, Martin P, Masson M, Maurs-Ferrer I, Mauvieux J, Mazmanian S, Mechin E, Mekaoui L, Meniai M, Metton A, Mihoubi A, Miron M, Mora G, Niro Adès V, Nubukpo P, Omnes C, Papin S, Paris P, Passerieux C, Pellerin J, Perlbarg J, Perron S, Petit A, Petitjean F, Portefaix C, Pringuey D, Radtchenko A, Rahiou H, Raucher-Chéné D, Rauzy A, Reinheimer L, Renard M, René M, Rengade CE, Reynaud P, Robin D, Rodrigues C, Rollet A, Rondepierre F, Rousselot B, Rubingher S, Saba G, Salvarelli JP, Samuelian JC, Scemama-Ammar C, Schurhoff F, Schuster JP, Sechter D, Segalas B, Seguret T, Seigneurie AS, Semmak A, Slama F, Taisne S, Taleb M, Terra JL, Thefenne D, Tran E, Tourtauchaux R, Vacheron MN, Vandel P, Vanhoucke V, Venet E, Verdoux H, Viala A, Vidon G, Vitre M, Vurpas JL, Wagermez C, Walter M, Yon L, Zendjidjian X. Psychiatric and physical outcomes of long-term use of lithium in older adults with bipolar disorder and major depressive disorder: A cross-sectional multicenter study. J Affect Disord 2019; 259:210-217. [PMID: 31446382 DOI: 10.1016/j.jad.2019.08.056] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 07/11/2019] [Accepted: 08/18/2019] [Indexed: 12/19/2022]
Abstract
OBJECTIVE Although lithium is widely used in current practice to treat bipolar disorder (BD) and treatment-resistant major depressive disorder (MDD) among older adults, little is known about its efficacy and tolerability in this population, which is generally excluded from randomized clinical trials. The objective of this study was to evaluate the efficacy and tolerability of long-term use of lithium among older adults with BD and MDD. METHOD Data from the Cohort of individuals with Schizophrenia and mood disorders Aged 55 years or more (CSA) were used. Two groups of patients with BD and MDD were compared: those who were currently receiving lithium versus those who were not. The effects of lithium on psychiatric (i.e., depressive symptoms severity, perceived clinical severity, rates of psychiatric admissions in the past-year), geriatric (overall and cognitive functioning) and physical outcomes (i.e., rates of non-psychiatric medical comorbidities and general hospital admissions in the past-year) were evaluated. All analyses were adjusted for age, sex, duration of disorder, diagnosis, smoking status, alcohol use, and use of antipsychotics, antiepileptics or antidepressants. RESULTS Among the 281 older participants with BD or MDD, 15.7% were taking lithium for a mean duration of 12.5(SD = 11.6) years. Lithium use was associated with lower intensity of depressive symptoms, reduced perceived clinical global severity and lower benzodiazepine use (all p < 0.05), without being linked to greater rates of medical comorbidities, except for hypothyroidism. LIMITATIONS Data were cross-sectional and data on lifetime history of psychotropic medications was not assessed. CONCLUSION Our results suggest that long-term lithium use may be efficient and relatively well-tolerated in older adults with BD or treatment-resistant MDD.
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Affiliation(s)
- Elise Morlet
- Department of Psychiatry, Corentin Celton Hospital, 4 Parvis Corentin Celton, 92130 Issy-les-Moulineaux, France
| | - Jean-François Costemale-Lacoste
- Department of Psychiatry, Corentin Celton Hospital, 4 Parvis Corentin Celton, 92130 Issy-les-Moulineaux, France; INSERM UMRS 1178, CESP, Le Kremlin Bicêtre, France.
| | - Emmanuel Poulet
- INSERM, U1028, CNRS, UMR5292, Lyon Neuroscience Research Center, PSY-R2 Team, Lyon F-69000, France
| | - Kibby McMahon
- Department of Psychology & Neuroscience, Duke University, 2213 Elba Street, Durham, NC 27710, United States
| | - Nicolas Hoertel
- Department of Psychiatry, Corentin Celton Hospital, 4 Parvis Corentin Celton, 92130 Issy-les-Moulineaux, France; INSERM UMR 894, Psychiatry and Neurosciences Center, Paris, France; Paris Descartes University, Sorbonne Paris Cité, Paris, France
| | - Frédéric Limosin
- Department of Psychiatry, Corentin Celton Hospital, 4 Parvis Corentin Celton, 92130 Issy-les-Moulineaux, France; INSERM UMR 894, Psychiatry and Neurosciences Center, Paris, France; Paris Descartes University, Sorbonne Paris Cité, Paris, France
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Filipot JF, Guimaraes P, Leckler F, Hortsmann J, Carrasco R, Leroy E, Fady N, Accensi M, Prevosto M, Duarte R, Roeber V, Benetazzo A, Raoult C, Franzetti M, Varing A, Le Dantec N. La Jument lighthouse: a real-scale laboratory for the study of giant waves and their loading on marine structures. Philos Trans A Math Phys Eng Sci 2019; 377:20190008. [PMID: 31424340 PMCID: PMC6710471 DOI: 10.1098/rsta.2019.0008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 06/08/2019] [Indexed: 06/10/2023]
Abstract
This paper presents results from an experiment designed to improve the understanding of the relationship between extreme breaking waves and their mechanical loading on heritage offshore lighthouses. The experiment, conducted at La Jument, an iconic French offshore lighthouse, featured several records of wave, current and structure accelerations acquired during severe storm conditions, with individual waves as high as 24 m. Data analysis focuses on a storm event marked by a strong peak in the horizontal accelerations measured inside La Jument. Thanks to stereo-video wave measurements synchronized to the acceleration record we were able to identify and describe the breaking wave responsible for this intense loading. Our observations suggest that this giant wave (19 m high) had a crest elevation high enough to directly hit the lighthouse tower, above the substructure. This paper reveals the potential for conducting ambitious field experiments from offshore lighthouses in order to collect valuable storm waves and wave loading observations. This offers a possible second service life for these heritage structures as in situ laboratories dedicated to the study of the coastal hydrodynamics and its interaction with marine structures. This article is part of the theme issue 'Environmental loading of heritage structures'.
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Affiliation(s)
| | - P. Guimaraes
- Service Hydrographique et Oceanographique de la Marine, Brest, Bretagne, France
| | - F. Leckler
- Service Hydrographique et Oceanographique de la Marine, Brest, Bretagne, France
| | - J. Hortsmann
- Helmholtz-Zentrum Geesthacht HZG Campus Teltow, Geestacht, Germany
| | - R. Carrasco
- Helmholtz-Zentrum Geesthacht HZG Campus Teltow, Geestacht, Germany
| | - E. Leroy
- CEREMA Direction territoriale Ouest, Plouzané, Bretagne, France
| | - N. Fady
- CEREMA Direction territoriale Ouest, Plouzané, Bretagne, France
| | | | | | - R. Duarte
- France Energies Marines, Plouzané, Bretagne, France
| | - V. Roeber
- University of Pau and Pays de l&Adour, Bidart, France
| | | | - C. Raoult
- Service Hydrographique et Oceanographique de la Marine, Brest, Bretagne, France
| | | | - A. Varing
- France Energies Marines, Plouzané, Bretagne, France
| | - N. Le Dantec
- CEREMA Direction territoriale Ouest, Plouzané, Bretagne, France
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17
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Godet M, Vergès-Belmin V, Gauquelin N, Saheb M, Monnier J, Leroy E, Bourgon J, Verbeeck J, Andraud C. Nanoscale investigation by TEM and STEM-EELS of the laser induced yellowing. Micron 2018; 115:25-31. [DOI: 10.1016/j.micron.2018.08.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 08/17/2018] [Accepted: 08/17/2018] [Indexed: 11/28/2022]
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Bouvet C, Bertin K, Lafond C, Williaume D, de Crevoisier R, Leroy E. [Organization and risk management in stereotaxic body radiotherapy at the treatment station]. Cancer Radiother 2018; 22:532-536. [PMID: 30181030 DOI: 10.1016/j.canrad.2018.07.132] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Revised: 07/18/2018] [Accepted: 07/18/2018] [Indexed: 10/28/2022]
Abstract
The development of stereotaxic body radiotherapy in the last decade has forced the radiotherapy departments to redouble their efforts in the fields of quality and risk management. For this purpose, increasingly complex and rigorous controls of high performance machines as well as a solid team training must be put in place. Extreme hypofractionation requires both increased vigilance at the treatment desk and well-defined and known procedures. The in place organizations contribute to the control of the risks related to the stereotaxic body radiotherapy machines. The medical presence at the beginning of the treatment fractions has been specified as mandatory in a regulatory way since January 2017. This not only ensures security, but also transmits information to the radiation therapy technicians. At the Eugène-Marquis center, the skills of the technicians for stereotaxic body radiotherapy on two dedicated machines (Cyberknife® and Versa HD® Novalis® type) have been upgraded. An accreditation is formalized after a training period and re-evaluated annually. The communication inside and outside the radiotherapy field plays also an important role in maintaining a high level of exchange and sharing of essential information. The means implemented at the Eugène-Marquis center increase the risk control of SBRT, by paying attention to the management of skills at the treatment station.
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Affiliation(s)
- C Bouvet
- Département de radiothérapie, centre Eugène-Marquis, avenue de la Bataille-Flandres-Dunkerque, 35000 Rennes, France.
| | - K Bertin
- Département de radiothérapie, centre Eugène-Marquis, avenue de la Bataille-Flandres-Dunkerque, 35000 Rennes, France
| | - C Lafond
- Département de radiothérapie, centre Eugène-Marquis, avenue de la Bataille-Flandres-Dunkerque, 35000 Rennes, France
| | - D Williaume
- Département de radiothérapie, centre Eugène-Marquis, avenue de la Bataille-Flandres-Dunkerque, 35000 Rennes, France
| | - R de Crevoisier
- Département de radiothérapie, centre Eugène-Marquis, avenue de la Bataille-Flandres-Dunkerque, 35000 Rennes, France
| | - E Leroy
- Département de radiothérapie, centre Eugène-Marquis, avenue de la Bataille-Flandres-Dunkerque, 35000 Rennes, France
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Abstract
Background Mouse leukemia, L1210, strongly enhances its immunogenicity following in vivo treatment with 5-(3-3′-dimethyl-1-triazeno) imidazole-4-carboxamide (DTIC). Previous experiments have shown that transformed cells elicit a cell-mediated response accountable for rejection and resistance to a subsequent injection of parental tumor into a syngeneic host. L1210 expresses classical H-2 class I molecules, and since it has been shown that DTIC treatment does not modify the expression of these molecules, this is a suitable model to study nonclassical class I antigens, such as Qa2 glycoproteins, and their potential role in tumoregenicity. Methods Cloned cells from L1210 were treated with DTIC and then H-2D, and Qa antigen expression was studied on four clones, before and after xenogenization with DTIC. Results and conclusions a strong decrease of Qa2 molecule expression was demonstrated by radioimmunoassay and immunofluorescent staining and was confirmed by FACS and 2D-gel analysis. The presence or the absence of Qa antigens on tumor cells could thus be involved in tolerance or rejection of tumor cells in syngeneic animals.
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Affiliation(s)
- E Leroy
- Department of Pharmacology, School of Medicine, University of Milan, Italy
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De Vries H, Mikolajczak M, Salmon JM, Abecassis J, Chaunier L, Guessasma S, Lourdin D, Belhabib S, Leroy E, Trystram G. Small-scale food process engineering — Challenges and perspectives. INNOV FOOD SCI EMERG 2018. [DOI: 10.1016/j.ifset.2017.09.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Scalbert-Dujardin M, Boldron A, Leroy E, Bazin J, Froment-Leclercq E. [Influenza vaccination and cystic fibrosis. Impact of an incentivisation campaign about influenza vaccination for patients attending the Dunkerque cystic fibrosis treatment centre and their health care workers]. Rev Mal Respir 2018; 35:279-286. [PMID: 29588090 DOI: 10.1016/j.rmr.2017.11.003] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Accepted: 03/17/2017] [Indexed: 10/17/2022]
Abstract
INTRODUCTION The main aim of this study is to evaluate the effectiveness of preventive actions regarding influenza in the studied populations. The secondary objective is to analyze and understand the mechanisms which bring about a behavioural change regarding influenza vaccination. METHODS The interventional and prospective study was undertaken in the form of an anonymous questionnaire about influenza vaccination coverage and about the reasons for vaccinating or not vaccinating. The studied populations were patients followed for cystic fibrosis (n=67) in the Dunkerque cystic fibrosis treatment centre and their health care workers (n=117), before (April 2014) and after (April 2015) an information campaign and primary prevention actions (vaccination in the workplace with expanded time slots) in collaboration with the department of occupational medicine. RESULTS In 2015, the vaccination coverage rate of health care workers rose to 65.63%, that is to say 2.38 times more than in 2014 (27.55%). This difference is significant (χ2[1]=29.17, P<0.0001). However, no significant difference between 2014 and 2015 was observed among patients (children and adults) (χ2[1]=0.24, NS) whose vaccination coverage was already optimal before the study. CONCLUSIONS Raising awareness among health care workers about vaccination against influenza increases the coverage rate and decreases outbreaks of virus infection in the care services and among patients at risk. Three main levers were identified: the necessity of providing information on influenza vaccination to health care workers, the ease of vaccination access and the attitude towards vaccination of supervisory staff (health executives/doctors).
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Affiliation(s)
- M Scalbert-Dujardin
- Centre de ressources et de compétences de la mucoviscidose (CRCM) mixte, centre hospitalier de Dunkerque, 59385 Dunkerque, France.
| | - A Boldron
- Centre de ressources et de compétences de la mucoviscidose (CRCM) mixte, centre hospitalier de Dunkerque, 59385 Dunkerque, France
| | - E Leroy
- Centre de ressources et de compétences de la mucoviscidose (CRCM) mixte, centre hospitalier de Dunkerque, 59385 Dunkerque, France
| | - J Bazin
- Centre de ressources et de compétences de la mucoviscidose (CRCM) mixte, centre hospitalier de Dunkerque, 59385 Dunkerque, France
| | - E Froment-Leclercq
- Centre de ressources et de compétences de la mucoviscidose (CRCM) mixte, centre hospitalier de Dunkerque, 59385 Dunkerque, France
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Leroy E, Constantinescu SN. Rethinking JAK2 inhibition: towards novel strategies of more specific and versatile Janus kinase inhibition. Leukemia 2017; 31:2853. [PMID: 29210365 DOI: 10.1038/leu.2017.158] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
This corrects the article DOI: 10.1038/leu.2017.43.
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Decaen P, Rolland-Sabaté A, Guilois S, Jury V, Allanic N, Colomines G, Lourdin D, Leroy E. Choline chloride vs choline ionic liquids for starch thermoplasticization. Carbohydr Polym 2017; 177:424-432. [DOI: 10.1016/j.carbpol.2017.09.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 09/05/2017] [Accepted: 09/05/2017] [Indexed: 10/18/2022]
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Diamantopoulou Z, Gilles ME, Sader M, Cossutta M, Vallée B, Houppe C, Habert D, Brissault B, Leroy E, Maione F, Giraudo E, Destouches D, Penelle J, Courty J, Cascone I. Multivalent cationic pseudopeptide polyplexes as a tool for cancer therapy. Oncotarget 2017; 8:90108-90122. [PMID: 29163814 PMCID: PMC5685735 DOI: 10.18632/oncotarget.21441] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 08/27/2017] [Indexed: 11/25/2022] Open
Abstract
In this study, a novel anticancer reagent based on polyplexes nanoparticles was developed. These nanoparticles are obtained by mixing negatively charged polyelectrolytes with the antitumour cationically-charged pseudopeptide N6L. Using two in vivo experimental tumor pancreatic models based upon PANC-1 and mPDAC cells, we found that the antitumour activity of N6L is significantly raised via its incorporation in polyplexed nanoparticles. Study of the mechanism of action using affinity isolation and si-RNA experiments indicated that N6L-polyplexes are internalized through their interaction with nucleolin. In addition, using a very aggressive model of pancreatic cancer in which gemcitabine, a standard of care for this type of cancer, has a weak effect on tumour growth, we observed that N6L-polyplexes administration has a stronger efficacy than gemcitabine. Biodistribution studies carried out in tumour-bearing mice indicated that N6L-polyplexes localises in tumour tissue, in agreement with its antitumour effect. These results support the idea that N6L nanoparticles could develop into a promising strategy for the treatment of cancer, especially hard-to-treat pancreatic cancers.
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Affiliation(s)
- Zoi Diamantopoulou
- Laboratory of Growth, Reparation and Tissue Regeneration (CRRET), University of Paris Est, ERL-CNRS 9215, 94010 Créteil, France
| | - Maud-Emmanuelle Gilles
- Laboratory of Growth, Reparation and Tissue Regeneration (CRRET), University of Paris Est, ERL-CNRS 9215, 94010 Créteil, France
| | - Maha Sader
- Laboratory of Growth, Reparation and Tissue Regeneration (CRRET), University of Paris Est, ERL-CNRS 9215, 94010 Créteil, France
| | - Mélissande Cossutta
- Laboratory of Growth, Reparation and Tissue Regeneration (CRRET), University of Paris Est, ERL-CNRS 9215, 94010 Créteil, France
| | - Benoit Vallée
- Laboratory of Growth, Reparation and Tissue Regeneration (CRRET), University of Paris Est, ERL-CNRS 9215, 94010 Créteil, France
| | - Claire Houppe
- Laboratory of Growth, Reparation and Tissue Regeneration (CRRET), University of Paris Est, ERL-CNRS 9215, 94010 Créteil, France
| | - Damien Habert
- Laboratory of Growth, Reparation and Tissue Regeneration (CRRET), University of Paris Est, ERL-CNRS 9215, 94010 Créteil, France
| | - Blandine Brissault
- East Paris Institute of Chemistry and Materials Science, CNRS & University Paris-Est, 94320 Thiais, France
| | - Eric Leroy
- East Paris Institute of Chemistry and Materials Science, CNRS & University Paris-Est, 94320 Thiais, France
| | - Federica Maione
- Department of Oncological Sciences and Laboratory of Transgenic Mouse Models, Institute for Cancer Research and Treatment, University of Torino School of Medicine, I-10060 Candiolo, Torino, Italy
| | - Enrico Giraudo
- Department of Oncological Sciences and Laboratory of Transgenic Mouse Models, Institute for Cancer Research and Treatment, University of Torino School of Medicine, I-10060 Candiolo, Torino, Italy
| | - Damien Destouches
- Laboratory of Growth, Reparation and Tissue Regeneration (CRRET), University of Paris Est, ERL-CNRS 9215, 94010 Créteil, France
| | - Jacques Penelle
- East Paris Institute of Chemistry and Materials Science, CNRS & University Paris-Est, 94320 Thiais, France
| | - José Courty
- Laboratory of Growth, Reparation and Tissue Regeneration (CRRET), University of Paris Est, ERL-CNRS 9215, 94010 Créteil, France
| | - Ilaria Cascone
- Laboratory of Growth, Reparation and Tissue Regeneration (CRRET), University of Paris Est, ERL-CNRS 9215, 94010 Créteil, France
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Favero J, Belhabib S, Guessasma S, Decaen P, Reguerre AL, Lourdin D, Leroy E. On the representative elementary size concept to evaluate the compatibilisation of a plasticised biopolymer blend. Carbohydr Polym 2017; 172:120-129. [DOI: 10.1016/j.carbpol.2017.05.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Revised: 04/19/2017] [Accepted: 05/04/2017] [Indexed: 12/21/2022]
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26
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Zhang H, Menguy N, Wang F, Benzerara K, Leroy E, Liu P, Liu W, Wang C, Pan Y, Chen Z, Li J. Magnetotactic Coccus Strain SHHC-1 Affiliated to Alphaproteobacteria Forms Octahedral Magnetite Magnetosomes. Front Microbiol 2017; 8:969. [PMID: 28611762 PMCID: PMC5447723 DOI: 10.3389/fmicb.2017.00969] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Accepted: 05/15/2017] [Indexed: 11/13/2022] Open
Abstract
Magnetotactic bacteria (MTB) are morphologically and phylogenetically diverse prokaryotes. They can form intracellular chain-assembled magnetite (Fe3O4) or greigite (Fe3S4) nanocrystals each enveloped by a lipid bilayer membrane called a magnetosome. Magnetotactic cocci have been found to be the most abundant morphotypes of MTB in various aquatic environments. However, knowledge on magnetosome biomineralization within magnetotactic cocci remains elusive due to small number of strains that have been cultured. By using a coordinated fluorescence and scanning electron microscopy method, we discovered a unique magnetotactic coccus strain (tentatively named SHHC-1) in brackish sediments collected from the estuary of Shihe River in Qinhuangdao city, eastern China. It phylogenetically belongs to the Alphaproteobacteria class. Transmission electron microscopy analyses reveal that SHHC-1 cells formed many magnetite-type magnetosomes organized as two bundles in each cell. Each bundle contains two parallel chains with smaller magnetosomes generally located at the ends of each chain. Unlike most magnetotactic alphaproteobacteria that generally form magnetosomes with uniform crystal morphologies, SHHC-1 magnetosomes display a more diverse variety of crystal morphology even within a single cell. Most particles have rectangular and rhomboidal projections, whilst others are triangular, or irregular. High resolution transmission electron microscopy observations coupled with morphological modeling indicate an idealized model-elongated octahedral crystals, a form composed of eight {111} faces. Furthermore, twins, multiple twins and stack dislocations are frequently observed in the SHHC-1 magnetosomes. This suggests that biomineralization of strain SHHC-1 magnetosome might be less biologically controlled than other magnetotactic alphaproteobacteria. Alternatively, SHHC-1 is more sensitive to the unfavorable environments under which it lives, or a combination of both factors may have controlled the magnetosome biomineralization process within this unique MTB.
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Affiliation(s)
- Heng Zhang
- Department of Life Science and Technology, Heilongjiang Bayi Agricultural UniversityDaqing, China.,Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of SciencesBeijing, China.,Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and TechnologyQingdao, China.,France-China Biomineralization and Nano-structures Laboratory, Chinese Academy of SciencesBeijing, China
| | - Nicolas Menguy
- France-China Biomineralization and Nano-structures Laboratory, Chinese Academy of SciencesBeijing, China.,IMPMC, Centre National de la Recherche Scientifique, UMR 7590, Sorbonne Universités, MNHN, UPMC, IRD UMR 206Paris, France
| | - Fuxian Wang
- Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of SciencesBeijing, China.,Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and TechnologyQingdao, China.,France-China Biomineralization and Nano-structures Laboratory, Chinese Academy of SciencesBeijing, China
| | - Karim Benzerara
- IMPMC, Centre National de la Recherche Scientifique, UMR 7590, Sorbonne Universités, MNHN, UPMC, IRD UMR 206Paris, France
| | - Eric Leroy
- France Chimie Me'tallurgique des Terres Rares, ICMPE, UMR 7182, Centre National de la Recherche ScientifiqueThiais, France
| | - Peiyu Liu
- Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of SciencesBeijing, China.,Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and TechnologyQingdao, China.,France-China Biomineralization and Nano-structures Laboratory, Chinese Academy of SciencesBeijing, China
| | - Wenqi Liu
- Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of SciencesBeijing, China.,Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and TechnologyQingdao, China.,France-China Biomineralization and Nano-structures Laboratory, Chinese Academy of SciencesBeijing, China
| | - Chunli Wang
- Department of Life Science and Technology, Heilongjiang Bayi Agricultural UniversityDaqing, China
| | - Yongxin Pan
- Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of SciencesBeijing, China.,France-China Biomineralization and Nano-structures Laboratory, Chinese Academy of SciencesBeijing, China
| | - Zhibao Chen
- Department of Life Science and Technology, Heilongjiang Bayi Agricultural UniversityDaqing, China
| | - Jinhua Li
- Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of SciencesBeijing, China.,Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and TechnologyQingdao, China.,France-China Biomineralization and Nano-structures Laboratory, Chinese Academy of SciencesBeijing, China
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27
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Bendaoud A, Kehrbusch R, Baranov A, Duchemin B, Maigret JE, Falourd X, Staiger MP, Cathala B, Lourdin D, Leroy E. Nanostructured cellulose-xyloglucan blends via ionic liquid/water processing. Carbohydr Polym 2017; 168:163-172. [PMID: 28457437 DOI: 10.1016/j.carbpol.2017.03.080] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 03/17/2017] [Accepted: 03/23/2017] [Indexed: 11/30/2022]
Abstract
In this work, the properties of cellulose (CE)/xyloglucan (XG) biopolymer blends are investigated, taking inspiration from the outstanding mechanical properties of plant cell walls. CE and XG were first co-solubilized in an ionic liquid, 1-ethyl-3-methylimidazolium acetate, in order to blend these biopolymers with a varying CE:XG ratio. The biopolymers were then regenerated together using water to produce solid blends in the form of films. Water-soluble XG persisted in the films following regeneration in water, indicating an attractive interaction between the CE and XG. The final CE:XG ratio of the blends was close to the initial value in solutions, further suggesting that intimate mixing takes place between CE and XG. The resulting CE/XG films were found to be free of ionic liquid, transparent and with no evidence of phase separation at the micron scale. The mechanical properties of the blend with a CE:XG ratio close to one revealed a synergistic effect for which a maximum in the elongation and stress at break was observed in combination with a high elastic modulus. Atomic force microscopy indicates a co-continuous nanostructure for this composition. It is proposed that the non-monotonous variation of the mechanical performance of the films with XG content is due to this observed nanostructuration.
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Affiliation(s)
- Amine Bendaoud
- UR1268 Biopolymères Interactions Assemblages, INRA, F-44300 Nantes, France
| | - Rene Kehrbusch
- Department of Mechanical Engineering, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand
| | - Anton Baranov
- Department of Mechanical Engineering, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand
| | | | - Jean Eudes Maigret
- UR1268 Biopolymères Interactions Assemblages, INRA, F-44300 Nantes, France
| | - Xavier Falourd
- UR1268 Biopolymères Interactions Assemblages, INRA, F-44300 Nantes, France
| | - Mark P Staiger
- Department of Mechanical Engineering, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand
| | - Bernard Cathala
- UR1268 Biopolymères Interactions Assemblages, INRA, F-44300 Nantes, France
| | - Denis Lourdin
- UR1268 Biopolymères Interactions Assemblages, INRA, F-44300 Nantes, France
| | - Eric Leroy
- LUNAM Université, CNRS, GEPEA, UMR 6144, CRTT, 37, Boulevard de l'Université, 44606 St. Nazaire Cedex, France.
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28
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Sagnelli D, Hebelstrup KH, Leroy E, Rolland-Sabaté A, Guilois S, Kirkensgaard JJK, Mortensen K, Lourdin D, Blennow A. Corrigendum to "Plant-crafted starches for bioplastics production" [Carbohydr. Polym. 152 (2016) 398-408]. Carbohydr Polym 2017; 157:903. [PMID: 27988005 DOI: 10.1016/j.carbpol.2016.10.077] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Domenico Sagnelli
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark
| | - Kim H Hebelstrup
- Department of Molecular Biology and Genetics, University of Aarhus, Forsøgsvej 1, 4200 Slagelse, Denmark
| | - Eric Leroy
- UR1268 Biopolymères Interactions Assemblages, INRA, F-44316 Nantes, France
| | | | - Sophie Guilois
- UR1268 Biopolymères Interactions Assemblages, INRA, F-44316 Nantes, France
| | - Jacob J K Kirkensgaard
- Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark
| | - Kell Mortensen
- Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark
| | - Denis Lourdin
- UR1268 Biopolymères Interactions Assemblages, INRA, F-44316 Nantes, France
| | - Andreas Blennow
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark.
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Sagnelli D, Hebelstrup KH, Leroy E, Rolland-Sabaté A, Guilois S, Kirkensgaard JJ, Mortensen K, Lourdin D, Blennow A. Plant-crafted starches for bioplastics production. Carbohydr Polym 2016; 152:398-408. [DOI: 10.1016/j.carbpol.2016.07.039] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 06/27/2016] [Accepted: 07/10/2016] [Indexed: 01/26/2023]
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Tran TKN, Colomines G, Leroy E, Nourry A, Pilard JF, Deterre R. Rubber-based acrylate resins: An alternative for tire recycling and carbon neutral thermoset materials design. J Appl Polym Sci 2016. [DOI: 10.1002/app.43548] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Thi Kieu Nhung Tran
- LUNAM Université, IUT de Nantes, CNRS, GEPEA, UMR 6144, OPERP; 2 Avenue du professeur Jean ROUXEL, BP 539 Carquefou 44475 France
| | - Gaël Colomines
- LUNAM Université, IUT de Nantes, CNRS, GEPEA, UMR 6144, OPERP; 2 Avenue du professeur Jean ROUXEL, BP 539 Carquefou 44475 France
| | - Eric Leroy
- LUNAM Université, CNRS, GEPEA, UMR 6144, CRTT, 37, Boulevard de l'Université; St Nazaire Cedex 44606 France
| | - Arnaud Nourry
- LUNAM Université, Université du Maine, UMR CNRS 6283, Institut des Molécules et Matériaux du Mans; Avenue Olivier Messiaen Le Mans Cedex 9 72085 France
| | - Jean-François Pilard
- LUNAM Université, Université du Maine, UMR CNRS 6283, Institut des Molécules et Matériaux du Mans; Avenue Olivier Messiaen Le Mans Cedex 9 72085 France
| | - Rémi Deterre
- LUNAM Université, IUT de Nantes, CNRS, GEPEA, UMR 6144, OPERP; 2 Avenue du professeur Jean ROUXEL, BP 539 Carquefou 44475 France
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Wurtz N, Papa A, Hukic M, Di Caro A, Leparc-Goffart I, Leroy E, Landini MP, Sekeyova Z, Dumler JS, Bădescu D, Busquets N, Calistri A, Parolin C, Palù G, Christova I, Maurin M, La Scola B, Raoult D. Survey of laboratory-acquired infections around the world in biosafety level 3 and 4 laboratories. Eur J Clin Microbiol Infect Dis 2016; 35:1247-58. [PMID: 27234593 PMCID: PMC7088173 DOI: 10.1007/s10096-016-2657-1] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Accepted: 04/20/2016] [Indexed: 11/27/2022]
Abstract
Laboratory-acquired infections due to a variety of bacteria, viruses, parasites, and fungi have been described over the last century, and laboratory workers are at risk of exposure to these infectious agents. However, reporting laboratory-associated infections has been largely voluntary, and there is no way to determine the real number of people involved or to know the precise risks for workers. In this study, an international survey based on volunteering was conducted in biosafety level 3 and 4 laboratories to determine the number of laboratory-acquired infections and the possible underlying causes of these contaminations. The analysis of the survey reveals that laboratory-acquired infections have been infrequent and even rare in recent years, and human errors represent a very high percentage of the cases. Today, most risks from biological hazards can be reduced through the use of appropriate procedures and techniques, containment devices and facilities, and the training of personnel.
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Affiliation(s)
- N Wurtz
- URMITE, CNRS UMR 7278, IRD 198, Inserm 1095, Aix Marseille Université, IHU Méditerranée Infection, 27 bd Jean Moulin, 13005, Marseille, France
| | - A Papa
- Department of Microbiology, Medical School, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - M Hukic
- International Burch University of Sarajevo, Sarajevo, Bosnia and Herzegovina
- Department of Medical Science, Academy of Sciences and Arts of Bosnia and Herzegovina, Sarajevo, Bosnia and Herzegovina
| | - A Di Caro
- National Institute for Infectious Diseases L. Spallanzani, Rome, Italy
| | - I Leparc-Goffart
- ERRIT-IRBA, HIA Laveran, Centre National de Référence des Arboviroses, 13384, Marseille, France
| | - E Leroy
- Laboratoire MiVEGEC, UMR IRD 224 CNRS 5290 UMI, 911 Av. Agropolis, 34394, Montpellier Cedex 5, France
- International Center for Medical Research of Franceville, BP769, Franceville, Gabon
| | - M P Landini
- Unit of Clinical Microbiology, Regional Reference Centre for Microbiological Emergencies (CRREM), St Orsola-Malpighi University Hospital, Bologna, Italy
| | - Z Sekeyova
- Institute of Virology, Slovak Academy of Sciences, Dúbravská cesta 9, 845 05, Bratislava, Slovak Republic
| | - J S Dumler
- Departments of Pathology and Microbiology & Immunology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - D Bădescu
- Cantacuzino National Institute of Research, Bucharest, Romania
| | - N Busquets
- IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain
| | - A Calistri
- Department of Molecular Medicine, University of Padova, Via Gabelli 63, 35100, Padova, Italy
| | - C Parolin
- Department of Molecular Medicine, University of Padova, Via Gabelli 63, 35100, Padova, Italy
| | - G Palù
- Department of Molecular Medicine, University of Padova, Via Gabelli 63, 35100, Padova, Italy
| | - I Christova
- Department of Microbiology, National Center of Infectious and Parasitic Diseases, Sofia, Bulgaria
| | - M Maurin
- Centre National de Référence des Francisella, Laboratoire de Bactériologie, Département des Agents Infectieux, Institut de Biologie et Pathologie, Centre Hospitalier Universitaire de Grenoble, Université Joseph Fourier, Grenoble, France
| | - B La Scola
- URMITE, CNRS UMR 7278, IRD 198, Inserm 1095, Aix Marseille Université, IHU Méditerranée Infection, 27 bd Jean Moulin, 13005, Marseille, France
| | - D Raoult
- URMITE, CNRS UMR 7278, IRD 198, Inserm 1095, Aix Marseille Université, IHU Méditerranée Infection, 27 bd Jean Moulin, 13005, Marseille, France.
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Cameron KN, Reed P, Morgan DB, Ondzié AI, Sanz CM, Kühl HS, Olson SH, Leroy E, Karesh WB, Mundry R. Spatial and Temporal Dynamics of a Mortality Event among Central African Great Apes. PLoS One 2016; 11:e0154505. [PMID: 27192424 PMCID: PMC4871434 DOI: 10.1371/journal.pone.0154505] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2015] [Accepted: 04/14/2016] [Indexed: 11/25/2022] Open
Abstract
In 2006-2007 we observed an unusual mortality event among apes in northern Republic of Congo that, although not diagnostically confirmed, we believe to have been a disease outbreak. In 2007-2011 we conducted ape nest surveys in the region, recording 11,835 G. g. gorilla nests (2,262 groups) and 5,548 P. t. troglodytes nests (2,139 groups). We developed a statistical model to determine likely points of origin of the outbreak to help identify variables associated with disease emergence and spread. We modeled disease spread across the study area, using suitable habitat conditions for apes as proxy for local ape densities. Infectious status outputs from that spread model were then used alongside vegetation, temperature, precipitation and human impact factors as explanatory variables in a Generalized Linear Model framework to explain observed 2007-2011 ape nest trends in the region. The best models predicted emergence in the western region of Odzala-Kokoua National Park and north of the last confirmed Ebola virus disease epizootics. Roads were consistently associated with attenuation of modeled virus spread. As disease is amongst the leading threats to great apes, gaining a better understanding of disease transmission dynamics in these species is imperative. Identifying ecological drivers underpinning a disease emergence event and transmission dynamics in apes is critical to creating better predictive models to guide wildlife management, develop potential protective measures for wildlife and to reduce potential zoonotic transmission to humans. The results of our model represent an important step in understanding variables related to great ape disease ecology in Central Africa.
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Affiliation(s)
- Kenneth N. Cameron
- Wildlife Health & Health Policy Program, Wildlife Conservation Society, Bronx, New York, United States of America
| | - Patricia Reed
- Wildlife Health & Health Policy Program, Wildlife Conservation Society, Bronx, New York, United States of America
| | - David B. Morgan
- Global Conservation Program, Wildlife Conservation Society, Bronx, New York, United States of America
- Lester E. Fisher Center for the Study and Conservation of Apes, Lincoln Park Zoo, Chicago, Illinois, United States of America
| | - Alain I. Ondzié
- Wildlife Health & Health Policy Program, Wildlife Conservation Society, Bronx, New York, United States of America
| | - Crickette M. Sanz
- Lester E. Fisher Center for the Study and Conservation of Apes, Lincoln Park Zoo, Chicago, Illinois, United States of America
- Department of Anthropology, Washington University, Saint Louis, Missouri, United States of America
| | - Hjalmar S. Kühl
- Max Planck Institute for Evolutionary Anthropology, Department of Primatology, Leipzig, Germany
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Leipzig-Jena, Leipzig, Germany
| | - Sarah H. Olson
- Wildlife Health & Health Policy Program, Wildlife Conservation Society, Bronx, New York, United States of America
- Center for Sustainability and the Global Environment (SAGE), University of Wisconsin, Madison, Wisconsin, United States of America
| | - Eric Leroy
- Centre International de Recherches Médicales de Franceville, Institut de Recherches pour le Développement, Franceville, Gabon
| | - William B. Karesh
- Wildlife Health & Health Policy Program, Wildlife Conservation Society, Bronx, New York, United States of America
| | - Roger Mundry
- Max Planck Institute for Evolutionary Anthropology, Department of Primatology, Leipzig, Germany
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Petitdemange C, Wauquier N, Devilliers H, Yssel H, Mombo I, Caron M, Nkoghé D, Debré P, Leroy E, Vieillard V. Longitudinal Analysis of Natural Killer Cells in Dengue Virus-Infected Patients in Comparison to Chikungunya and Chikungunya/Dengue Virus-Infected Patients. PLoS Negl Trop Dis 2016; 10:e0004499. [PMID: 26938618 PMCID: PMC4777550 DOI: 10.1371/journal.pntd.0004499] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Accepted: 02/08/2016] [Indexed: 11/18/2022] Open
Abstract
Background Dengue virus (DENV) is the most prominent arbovirus worldwide, causing major epidemics in South-East Asia, South America and Africa. In 2010, a major DENV-2 outbreak occurred in Gabon with cases of patients co-infected with chikungunya virus (CHIKV). Although the innate immune response is thought to be of primordial importance in the development and outcome of arbovirus-associated pathologies, our knowledge of the role of natural killer (NK) cells during DENV-2 infection is in its infancy. Methodology We performed the first extensive comparative longitudinal characterization of NK cells in patients infected by DENV-2, CHIKV or both viruses. Hierarchical clustering and principal component analyses were performed to discriminate between CHIKV and DENV-2 infected patients. Principal Findings We observed that both activation and differentiation of NK cells are induced during the acute phase of infection by DENV-2 and CHIKV. Combinatorial analysis however, revealed that both arboviruses induced two different signatures of NK-cell responses, with CHIKV more associated with terminal differentiation, and DENV-2 with inhibitory KIRs. We show also that intracellular production of interferon-γ (IFN-γ) by NK cells is strongly stimulated in acute DENV-2 infection, compared to CHIKV. Conclusions/Significance Although specific differences were observed between CHIKV and DENV-2 infections, the significant remodeling of NK cell populations observed here suggests their potential roles in the control of both infections. Dengue fever is the most important arthropod-borne viral disease worldwide, affecting 50 to 100 million individuals annually. The clinical picture associated with acute dengue virus (DENV) infections ranges from classical febrile illness to life-threatening disease. The innate immunity is the first line of defense in the control of viral replication. In this article, we examine the particular role of natural killer (NK) cells in DENV infection at different time points after the onset of symptoms. This extensive study was performed in comparison with patients infected by Chikungunya virus (CHIKV), another major arbovirus transmitted by the same mosquito vectors, and co-infected CHIKV/DENV-2 patients. We observed that DENV2 and CHIKV induced different signatures of NK-cell responses suggesting specific roles in the control of both infections.
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Affiliation(s)
- Caroline Petitdemange
- Sorbonne Universités, UPMC Univ Paris 06, INSERM U1135, CNRS ERL8255, Centre d’Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
- Centre International de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon
| | - Nadia Wauquier
- Sorbonne Universités, UPMC Univ Paris 06, INSERM U1135, CNRS ERL8255, Centre d’Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
- Centre International de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon
- Metabiota, Inc., San Francisco, California, United States of America
| | - Hervé Devilliers
- Internal Medicine and Systemic Diseases Department, Dijon University Hospital, Dijon, France
| | - Hans Yssel
- Sorbonne Universités, UPMC Univ Paris 06, INSERM U1135, CNRS ERL8255, Centre d’Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Illich Mombo
- Centre International de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon
| | - Mélanie Caron
- Centre International de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon
| | - Dieudonné Nkoghé
- Centre International de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon
| | - Patrice Debré
- Sorbonne Universités, UPMC Univ Paris 06, INSERM U1135, CNRS ERL8255, Centre d’Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Eric Leroy
- Centre International de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon
| | - Vincent Vieillard
- Sorbonne Universités, UPMC Univ Paris 06, INSERM U1135, CNRS ERL8255, Centre d’Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
- * E-mail:
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Boundenga L, Makanga B, Ollomo B, Gilabert A, Rougeron V, Mve-Ondo B, Arnathau C, Durand P, Moukodoum ND, Okouga AP, Delicat-Loembet L, Yacka-Mouele L, Rahola N, Leroy E, BA CT, Renaud F, Prugnolle F, Paupy C. Haemosporidian Parasites of Antelopes and Other Vertebrates from Gabon, Central Africa. PLoS One 2016; 11:e0148958. [PMID: 26863304 PMCID: PMC4749209 DOI: 10.1371/journal.pone.0148958] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Accepted: 01/25/2016] [Indexed: 12/25/2022] Open
Abstract
Re-examination, using molecular tools, of the diversity of haemosporidian parasites (among which the agents of human malaria are the best known) has generally led to rearrangements of traditional classifications. In this study, we explored the diversity of haemosporidian parasites infecting vertebrate species (particularly mammals, birds and reptiles) living in the forests of Gabon (Central Africa), by analyzing a collection of 492 bushmeat samples. We found that samples from five mammalian species (four duiker and one pangolin species), one bird and one turtle species were infected by haemosporidian parasites. In duikers (from which most of the infected specimens were obtained), we demonstrated the existence of at least two distinct parasite lineages related to Polychromophilus species (i.e., bat haemosporidian parasites) and to sauropsid Plasmodium (from birds and lizards). Molecular screening of sylvatic mosquitoes captured during a longitudinal survey revealed the presence of these haemosporidian parasite lineages also in several Anopheles species, suggesting a potential role in their transmission. Our results show that, differently from what was previously thought, several independent clades of haemosporidian parasites (family Plasmodiidae) infect mammals and are transmitted by anopheline mosquitoes.
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Affiliation(s)
- Larson Boundenga
- Centre International de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon BP 769 Franceville, Gabon
- Laboratory of Evolutionary Biology, Ecology and Management of Ecosystems, Faculty of Sciences and Techniques, Cheikh Anta Diop University of Dakar, Dakar, Senegal
- * E-mail: (LB); (FP)
| | - Boris Makanga
- Centre International de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon BP 769 Franceville, Gabon
- Laboratoire MIVEGEC, UMR 224–5290 IRD-CNRS-UM, Centre IRD de Montpellier, 34295 Montpellier, France
- Institut de Recherche en Ecologie Tropicale, Libreville, Gabon
| | - Benjamin Ollomo
- Centre International de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon BP 769 Franceville, Gabon
| | - Aude Gilabert
- Laboratoire MIVEGEC, UMR 224–5290 IRD-CNRS-UM, Centre IRD de Montpellier, 34295 Montpellier, France
| | - Virginie Rougeron
- Centre International de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon BP 769 Franceville, Gabon
- Laboratoire MIVEGEC, UMR 224–5290 IRD-CNRS-UM, Centre IRD de Montpellier, 34295 Montpellier, France
| | - Bertrand Mve-Ondo
- Centre International de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon BP 769 Franceville, Gabon
| | - Céline Arnathau
- Laboratoire MIVEGEC, UMR 224–5290 IRD-CNRS-UM, Centre IRD de Montpellier, 34295 Montpellier, France
| | - Patrick Durand
- Laboratoire MIVEGEC, UMR 224–5290 IRD-CNRS-UM, Centre IRD de Montpellier, 34295 Montpellier, France
| | - Nancy Diamella Moukodoum
- Centre International de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon BP 769 Franceville, Gabon
| | - Alain-Prince Okouga
- Centre International de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon BP 769 Franceville, Gabon
| | - Lucresse Delicat-Loembet
- Centre International de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon BP 769 Franceville, Gabon
| | - Lauriane Yacka-Mouele
- Centre International de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon BP 769 Franceville, Gabon
| | - Nil Rahola
- Centre International de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon BP 769 Franceville, Gabon
- Laboratoire MIVEGEC, UMR 224–5290 IRD-CNRS-UM, Centre IRD de Montpellier, 34295 Montpellier, France
| | - Eric Leroy
- Centre International de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon BP 769 Franceville, Gabon
- Laboratoire MIVEGEC, UMR 224–5290 IRD-CNRS-UM, Centre IRD de Montpellier, 34295 Montpellier, France
| | - Cheikh Tidiane BA
- Laboratory of Evolutionary Biology, Ecology and Management of Ecosystems, Faculty of Sciences and Techniques, Cheikh Anta Diop University of Dakar, Dakar, Senegal
| | - Francois Renaud
- Laboratoire MIVEGEC, UMR 224–5290 IRD-CNRS-UM, Centre IRD de Montpellier, 34295 Montpellier, France
| | - Franck Prugnolle
- Centre International de Recherches Médicales de Franceville (CIRMF), Franceville, Gabon BP 769 Franceville, Gabon
- Laboratoire MIVEGEC, UMR 224–5290 IRD-CNRS-UM, Centre IRD de Montpellier, 34295 Montpellier, France
- * E-mail: (LB); (FP)
| | - Christophe Paupy
- Laboratoire MIVEGEC, UMR 224–5290 IRD-CNRS-UM, Centre IRD de Montpellier, 34295 Montpellier, France
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Abstract
Easy and fast synthetic routes for the screening of cholinium bio ionic liquid structures for the plasticization of starch.
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Affiliation(s)
| | - P. Decaen
- LUNAM Université
- CNRS
- GEPEA
- UMR 6144
- CRTT
| | - D. Lourdin
- INRA Nantes-Angers
- Unité Biopolymères Interactions Assemblages (BIA-UR 1268)
- 44316 Nantes Cedex 3
- France
| | - E. Leroy
- LUNAM Université
- CNRS
- GEPEA
- UMR 6144
- CRTT
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Richard L, Rua R, Betsem E, Mouinga-Ondémé A, Kazanji M, Leroy E, Buseyne F, Afonso PV, Gessain A. Co-circulation of two envelope variants for both gorilla and chimpanzee Simian Foamy Virus strains among humans and apes living in Central Africa. Retrovirology 2015. [PMCID: PMC4577855 DOI: 10.1186/1742-4690-12-s1-p82] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Li J, Menguy N, Gatel C, Boureau V, Snoeck E, Patriarche G, Leroy E, Pan Y. Crystal growth of bullet-shaped magnetite in magnetotactic bacteria of the Nitrospirae phylum. J R Soc Interface 2015; 12:rsif.2014.1288. [PMID: 25566884 DOI: 10.1098/rsif.2014.1288] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Magnetotactic bacteria (MTB) are known to produce single-domain magnetite or greigite crystals within intracellular membrane organelles and to navigate along the Earth's magnetic field lines. MTB have been suggested as being one of the most ancient biomineralizing metabolisms on the Earth and they represent a fundamental model of intracellular biomineralization. Moreover, the determination of their specific crystallographic signature (e.g. structure and morphology) is essential for palaeoenvironmental and ancient-life studies. Yet, the mechanisms of MTB biomineralization remain poorly understood, although this process has been extensively studied in several cultured MTB strains in the Proteobacteria phylum. Here, we show a comprehensive transmission electron microscopy (TEM) study of magnetic and structural properties down to atomic scales on bullet-shaped magnetites produced by the uncultured strain MYR-1 belonging to the Nitrospirae phylum, a deeply branching phylogenetic MTB group. We observed a multiple-step crystal growth of MYR-1 magnetite: initial isotropic growth forming cubo-octahedral particles (less than approx. 40 nm), subsequent anisotropic growth and a systematic final elongation along [001] direction. During the crystal growth, one major {111} face is well developed and preserved at the larger basal end of the crystal. The basal {111} face appears to be terminated by a tetrahedral-octahedral-mixed iron surface, suggesting dimensional advantages for binding protein(s), which may template the crystallization of magnetite. This study offers new insights for understanding magnetite biomineralization within the Nitrospirae phylum.
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Affiliation(s)
- Jinhua Li
- Paleomagnetism and Geochronology Lab, Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, People's Republic of China Institut de Minéralogie, de Physique des Matériaux, et de Cosmochimie (IMPMC), Sorbonne Universités-UPMC Univ Paris 06, UMR CNRS 7590, Muséum National d'Histoire Naturelle (MNHN), IRD UMR 206, 4 Place Jussieu, Paris 75005, France France-China Biomineralization and Nano-structures Laboratory, Chinese Academy of Sciences, Beijing 100029, People's Republic of China
| | - Nicolas Menguy
- Institut de Minéralogie, de Physique des Matériaux, et de Cosmochimie (IMPMC), Sorbonne Universités-UPMC Univ Paris 06, UMR CNRS 7590, Muséum National d'Histoire Naturelle (MNHN), IRD UMR 206, 4 Place Jussieu, Paris 75005, France
| | | | | | | | | | - Eric Leroy
- France Chimie Métallurgique des Terres Rares, ICMPE, UMR 7182, CNRS, 2-8 rue Henri Dunant, Thiais Cedex 94320, France
| | - Yongxin Pan
- Paleomagnetism and Geochronology Lab, Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, People's Republic of China France-China Biomineralization and Nano-structures Laboratory, Chinese Academy of Sciences, Beijing 100029, People's Republic of China
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Lalevée J, Bourgon J, Poupart R, Leroy E, Batisda JC, Fouassier JP, Versace DL. Oxygen-Mediated Reactions in Photopolymerizable Radical Thin Films: Application to Simultaneous Photocuring Under Air and Nanoparticle Formation. MACROMOL CHEM PHYS 2015. [DOI: 10.1002/macp.201500104] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jacques Lalevée
- Institut de Science des Matériaux de Mulhouse (IS2M); UMR CNRS 7361; ENSCMu-UHA15, rue Jean Starcky 68057 Mulhouse CEDEX France
| | - Julie Bourgon
- Institut de Chimie et des Matériaux Paris-Est (ICMPE); UMR CNRS 7182; Université Paris-Est Créteil (UPEC); 2-8 rue Henri Dunant 94320 Thiais France
| | - Romain Poupart
- Institut de Chimie et des Matériaux Paris-Est (ICMPE); UMR CNRS 7182; Université Paris-Est Créteil (UPEC); 2-8 rue Henri Dunant 94320 Thiais France
| | - Eric Leroy
- Institut de Chimie et des Matériaux Paris-Est (ICMPE); UMR CNRS 7182; Université Paris-Est Créteil (UPEC); 2-8 rue Henri Dunant 94320 Thiais France
| | | | | | - Davy-Louis Versace
- Institut de Chimie et des Matériaux Paris-Est (ICMPE); UMR CNRS 7182; Université Paris-Est Créteil (UPEC); 2-8 rue Henri Dunant 94320 Thiais France
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Oumellal Y, Zlotea C, Bastide S, Cachet-Vivier C, Léonel E, Sengmany S, Leroy E, Aymard L, Bonnet JP, Latroche M. Bottom-up preparation of MgH₂ nanoparticles with enhanced cycle life stability during electrochemical conversion in Li-ion batteries. Nanoscale 2014; 6:14459-66. [PMID: 25340960 DOI: 10.1039/c4nr03444a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
A promising anode material for Li-ion batteries based on MgH₂ with around 5 nm average particles size was synthesized by a bottom-up method. A series of several composites containing MgH₂ nanoparticles well dispersed into a porous carbon host has been prepared with different metal content up to 70 wt%. A narrow particle size distribution (1-10 nm) of the MgH₂ nanospecies with around 5.5 nm average size can be controlled up to 50 wt% Mg. After a ball milling treatment under Ar, the composite containing 50 wt% Mg shows an impressive cycle life stability with a good electrochemical capacity of around 500 mA h g(-1). Moreover, the nanoparticles' size distribution is stable during cycling.
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Affiliation(s)
- Yassine Oumellal
- Institut de Chimie et des Matériaux Paris-Est, CNRS UPEC UMR 7182, 2-8 rue Henri Dunant, 94320 Thiais, France.
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Rougeron V, Sam IC, Caron M, Nkoghe D, Leroy E, Roques P. Chikungunya, a paradigm of neglected tropical disease that emerged to be a new health global risk. J Clin Virol 2014; 64:144-52. [PMID: 25453326 DOI: 10.1016/j.jcv.2014.08.032] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [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: 04/22/2014] [Accepted: 08/25/2014] [Indexed: 01/08/2023]
Abstract
Chikungunya virus (CHIKV) is an alphavirus of the Togaviridae family that causes chronic and incapacitating arthralgia in human populations. Since its discovery in 1952, CHIKV was responsible for sporadic and infrequent outbreaks. However, since 2005, global Chikungunya outbreaks have occurred, inducing some fatalities and associated with severe and chronic morbidity. Chikungunya is thus considered as an important re-emerging public health problem in both tropical and temperate countries, where the distribution of the Aedes mosquito vectors continues to expand. This review highlights the most recent advances in our knowledge and understanding of the epidemiology, biology, treatment and vaccination strategies of CHIKV.
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Affiliation(s)
- Virginie Rougeron
- Centre International de Recherches Médicales de Franceville, Franceville, Gabon; Unité Mixte de Recherche Maladies Infectieuses et Vecteurs: Ecologie, Génétique, Evolution et Contrôle (IRD 224 - CNRS 5290 - UM1-UM2), Institut de Recherche pour le Développement, Montpellier, France
| | - I-Ching Sam
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Mélanie Caron
- Centre International de Recherches Médicales de Franceville, Franceville, Gabon
| | - Dieudonné Nkoghe
- Centre International de Recherches Médicales de Franceville, Franceville, Gabon
| | - Eric Leroy
- Centre International de Recherches Médicales de Franceville, Franceville, Gabon; Unité Mixte de Recherche Maladies Infectieuses et Vecteurs: Ecologie, Génétique, Evolution et Contrôle (IRD 224 - CNRS 5290 - UM1-UM2), Institut de Recherche pour le Développement, Montpellier, France
| | - Pierre Roques
- CEA, Institute of Emerging Diseases and Innovative Therapies, Division of Immuno-Virology, Fontenay-aux-Roses, France; Université Paris-Sud 11, UMR E1, Orsay, France.
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Petitdemange C, Wauquier N, Jacquet JM, Theodorou I, Leroy E, Vieillard V. Association of HLA class-I and inhibitory KIR genotypes in Gabonese patients infected by Chikungunya or Dengue type-2 viruses. PLoS One 2014; 9:e108798. [PMID: 25264760 PMCID: PMC4181859 DOI: 10.1371/journal.pone.0108798] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Accepted: 09/02/2014] [Indexed: 11/18/2022] Open
Abstract
Background Natural killer (NK) cells provide defense in the early stages of the immune response against viral infections. Killer cell immunoglobulin-like receptors (KIR) expressed on the surface of NK cells play an important role in regulating NK cell response through recognition of human leukocyte antigen (HLA) class I molecules on target cells. Previous studies have shown that specific KIR/ligand combinations are associated with the outcome of several viral infectious diseases. Methods We investigated the impact of inhibitory and activating KIR and their HLA-class I ligand genotype on the susceptibility to Chikungunya virus (CHIKV) and Dengue virus (DENV2) infections. From April to July 2010 in Gabon, a large outbreak of CHIKV and DENV2 concomitantly occurred in two provinces of Gabon (Ogooué-Lolo and Haut-Ogooué). We performed the genotypic analysis of KIR in the combination with their cognate HLA-class I ligands in 73 CHIKV and 55 DENV2 adult cases, compared with 54 healthy individuals. Results We found in CHIV-infected patients that KIR2DL1 and KIR2DS5 are significantly increased and decreased respectively, as compared to DENV2+ patients and healthy donors. The combination of KIR2DL1 and its cognate HLA-C2 ligand was significantly associated with the susceptibility to CHIKV infection. In contrast, no other inhibitory KIR-HLA pairs showed an association with the two mosquito-borne arboviruses. Conclusion These observations are strongly suggestive that the NK cell repertoire shaped by the KIR2DL1:HLA-C2 interaction facilitate specific infection by CHIKV.
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Affiliation(s)
- Caroline Petitdemange
- Sorbonne Universités, UPMC, Univ Paris 06, CR7, CIMI-Paris, Paris, France
- INSERM, U1135, CIMI-Paris, Paris, France
- Centre International de Recherches Médicales de Franceville, Unité des maladies Emergentes, Franceville, Gabon
| | - Nadia Wauquier
- Sorbonne Universités, UPMC, Univ Paris 06, CR7, CIMI-Paris, Paris, France
- Metabiota Inc., San Francisco, California, United States of America
| | | | - Ioannis Theodorou
- Sorbonne Universités, UPMC, Univ Paris 06, CR7, CIMI-Paris, Paris, France
- INSERM, U1135, CIMI-Paris, Paris, France
- AP-HP Hôpital Pitié-Salpêtrière, Département d'Immunologie, Paris, France
| | - Eric Leroy
- Centre International de Recherches Médicales de Franceville, Unité des maladies Emergentes, Franceville, Gabon
- IRD, Maladies Infectieuses et Vecteurs: Ecologie, Génétique, Evolution et Contrôle, Montpellier, France
| | - Vincent Vieillard
- Sorbonne Universités, UPMC, Univ Paris 06, CR7, CIMI-Paris, Paris, France
- INSERM, U1135, CIMI-Paris, Paris, France
- CNRS, ERL8255, CIMI-Paris, Paris, France
- * E-mail:
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Versace DL, Bourgon J, Leroy E, Dumur F, Gigmes D, Fouassier JP, Lalevée J. Zinc complex based photoinitiating systems for acrylate polymerization under air; in situ formation of Zn-based fillers and composites. Polym Chem 2014. [DOI: 10.1039/c4py00716f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Naccache SN, Federman S, Veeraraghavan N, Zaharia M, Lee D, Samayoa E, Bouquet J, Greninger AL, Luk KC, Enge B, Wadford DA, Messenger SL, Genrich GL, Pellegrino K, Grard G, Leroy E, Schneider BS, Fair JN, Martínez MA, Isa P, Crump JA, DeRisi JL, Sittler T, Hackett J, Miller S, Chiu CY. A cloud-compatible bioinformatics pipeline for ultrarapid pathogen identification from next-generation sequencing of clinical samples. Genome Res 2014; 24:1180-92. [PMID: 24899342 PMCID: PMC4079973 DOI: 10.1101/gr.171934.113] [Citation(s) in RCA: 311] [Impact Index Per Article: 31.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Unbiased next-generation sequencing (NGS) approaches enable comprehensive pathogen detection in the clinical microbiology laboratory and have numerous applications for public health surveillance, outbreak investigation, and the diagnosis of infectious diseases. However, practical deployment of the technology is hindered by the bioinformatics challenge of analyzing results accurately and in a clinically relevant timeframe. Here we describe SURPI (“sequence-based ultrarapid pathogen identification”), a computational pipeline for pathogen identification from complex metagenomic NGS data generated from clinical samples, and demonstrate use of the pipeline in the analysis of 237 clinical samples comprising more than 1.1 billion sequences. Deployable on both cloud-based and standalone servers, SURPI leverages two state-of-the-art aligners for accelerated analyses, SNAP and RAPSearch, which are as accurate as existing bioinformatics tools but orders of magnitude faster in performance. In fast mode, SURPI detects viruses and bacteria by scanning data sets of 7–500 million reads in 11 min to 5 h, while in comprehensive mode, all known microorganisms are identified, followed by de novo assembly and protein homology searches for divergent viruses in 50 min to 16 h. SURPI has also directly contributed to real-time microbial diagnosis in acutely ill patients, underscoring its potential key role in the development of unbiased NGS-based clinical assays in infectious diseases that demand rapid turnaround times.
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Affiliation(s)
- Samia N Naccache
- Department of Laboratory Medicine, UCSF, San Francisco, California 94107, USA; UCSF-Abbott Viral Diagnostics and Discovery Center, San Francisco, California 94107, USA
| | - Scot Federman
- Department of Laboratory Medicine, UCSF, San Francisco, California 94107, USA; UCSF-Abbott Viral Diagnostics and Discovery Center, San Francisco, California 94107, USA
| | - Narayanan Veeraraghavan
- Department of Laboratory Medicine, UCSF, San Francisco, California 94107, USA; UCSF-Abbott Viral Diagnostics and Discovery Center, San Francisco, California 94107, USA
| | - Matei Zaharia
- Department of Computer Science, University of California, Berkeley, California 94720, USA
| | - Deanna Lee
- Department of Laboratory Medicine, UCSF, San Francisco, California 94107, USA; UCSF-Abbott Viral Diagnostics and Discovery Center, San Francisco, California 94107, USA
| | - Erik Samayoa
- Department of Laboratory Medicine, UCSF, San Francisco, California 94107, USA; UCSF-Abbott Viral Diagnostics and Discovery Center, San Francisco, California 94107, USA
| | - Jerome Bouquet
- Department of Laboratory Medicine, UCSF, San Francisco, California 94107, USA; UCSF-Abbott Viral Diagnostics and Discovery Center, San Francisco, California 94107, USA
| | | | - Ka-Cheung Luk
- Abbott Diagnostics, Abbott Park, Illinois 60064, USA
| | - Barryett Enge
- Viral and Rickettsial Disease Laboratory, California Department of Public Health, Richmond, California 94804, USA
| | - Debra A Wadford
- Viral and Rickettsial Disease Laboratory, California Department of Public Health, Richmond, California 94804, USA
| | - Sharon L Messenger
- Viral and Rickettsial Disease Laboratory, California Department of Public Health, Richmond, California 94804, USA
| | - Gillian L Genrich
- Department of Laboratory Medicine, UCSF, San Francisco, California 94107, USA
| | - Kristen Pellegrino
- Department of Family and Community Medicine, UCSF, San Francisco, California 94143, USA
| | - Gilda Grard
- Viral Emergent Diseases Unit, Centre International de Recherches Médicales de Franceville, Franceville, BP 769, Gabon
| | - Eric Leroy
- Viral Emergent Diseases Unit, Centre International de Recherches Médicales de Franceville, Franceville, BP 769, Gabon
| | | | - Joseph N Fair
- Metabiota, Inc., San Francisco, California 94104, USA
| | - Miguel A Martínez
- Departamento de Genética del Desarrollo y Fisiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, 62260, Mexico
| | - Pavel Isa
- Departamento de Genética del Desarrollo y Fisiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, 62260, Mexico
| | - John A Crump
- Division of Infectious Diseases and International Health and the Duke Global Health Institute, Duke University Medical Center, Durham, North Carolina 27708, USA; Kilimanjaro Christian Medical Centre, Moshi, Kilimanjaro, 7393, Tanzania; Centre for International Health, University of Otago, Dunedin, 9054, New Zealand
| | - Joseph L DeRisi
- Department of Biochemistry, UCSF, San Francisco, California 94107, USA
| | - Taylor Sittler
- Department of Laboratory Medicine, UCSF, San Francisco, California 94107, USA
| | - John Hackett
- Abbott Diagnostics, Abbott Park, Illinois 60064, USA
| | - Steve Miller
- Department of Laboratory Medicine, UCSF, San Francisco, California 94107, USA; UCSF-Abbott Viral Diagnostics and Discovery Center, San Francisco, California 94107, USA
| | - Charles Y Chiu
- Department of Laboratory Medicine, UCSF, San Francisco, California 94107, USA; UCSF-Abbott Viral Diagnostics and Discovery Center, San Francisco, California 94107, USA; Department of Medicine, Division of Infectious Diseases, UCSF, San Francisco, California 94143, USA
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Petitdemange C, Wauquier N, Rey J, Hervier B, Leroy E, Vieillard V. Control of acute dengue virus infection by natural killer cells. Front Immunol 2014; 5:209. [PMID: 24860571 PMCID: PMC4026719 DOI: 10.3389/fimmu.2014.00209] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Accepted: 04/27/2014] [Indexed: 02/02/2023] Open
Abstract
Dengue fever is the most important arthropod-borne viral disease worldwide, affecting 50–100 million individuals annually. The clinical picture associated with acute dengue virus (DENV) infections ranges from classical febrile illness to life-threatening disease. The innate immunity is the first line of defense in the control of viral replication. This review will examine the particular role of natural killer (NK) cells in DENV infection. Over recent years, our understanding of the interplay between NK cells and viral pathogenesis has improved significantly. NK cells express an array of inhibitory and activating receptors that enable them to detect infected targets while sparing normal cells, and to recruit adaptive immune cells. To date, the exact mechanism by which NK cells may contribute to the control of DENV infection remains elusive. Importantly, DENV has acquired mechanisms to evade NK cell responses, further underlining the relevance of these cells in pathophysiology. Hence, understanding how NK cells affect the outcome of DENV infection could benefit the management of this acute disease.
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Affiliation(s)
- Caroline Petitdemange
- Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Université Pierre et Marie Curie, Sorbonne Universités , Paris , France ; INSERM, U1135, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris) , Paris , France ; Centre International de Recherches Médicales de Franceville , Franceville , Gabon
| | - Nadia Wauquier
- Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Université Pierre et Marie Curie, Sorbonne Universités , Paris , France ; Metabiota Inc. , San Francisco, CA , USA
| | - Juliana Rey
- Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Université Pierre et Marie Curie, Sorbonne Universités , Paris , France
| | - Baptiste Hervier
- Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Université Pierre et Marie Curie, Sorbonne Universités , Paris , France ; INSERM, U1135, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris) , Paris , France
| | - Eric Leroy
- Centre International de Recherches Médicales de Franceville , Franceville , Gabon
| | - Vincent Vieillard
- Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Université Pierre et Marie Curie, Sorbonne Universités , Paris , France ; INSERM, U1135, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris) , Paris , France ; CNRS ERL8255, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris) , Paris , France
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Ategbo S, Kombila Koumavor C, Minto\’O Rogombe S, Nkoghe D, Leroy E, Moussavou A. SFP PC-81 – Etiologies virales des diarrhées aigües de l’enfant à Libreville. Arch Pediatr 2014. [DOI: 10.1016/s0929-693x(14)72230-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Délicat-Loembet LM, Elguero E, Arnathau C, Durand P, Ollomo B, Ossari S, Mezui-me-ndong J, Mbang Mboro T, Becquart P, Nkoghe D, Leroy E, Sica L, Gonzalez JP, Prugnolle F, Renaud F. Prevalence of the sickle cell trait in Gabon: a nationwide study. Infect Genet Evol 2014; 25:52-6. [PMID: 24727548 DOI: 10.1016/j.meegid.2014.04.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Revised: 03/26/2014] [Accepted: 04/03/2014] [Indexed: 10/25/2022]
Abstract
Sickle Cell Disease (SCD) is an important cause of death in young children in Africa, which the World Health Organization has declared a public health priority. Although SCD has been studied at the continental scale and at the local scale, a picture of its distribution at the scale of an African country has never been given. The aim of this study is to provide such a picture for the Republic of Gabon, a country where precisely the epidemiology of SCD has been poorly investigated. To this effect, 4250 blood samples from persons older than 15 were collected between June 2005 and September 2008 in 210 randomly selected villages from the nine administrative provinces of Gabon. Two methods were used to screen Sickle Cell Trait (SCT) carriers: isoelectric focusing (IEF) and high-performance liquid chromatography (HPLC). SCT prevalence in Gabon was 21.1% (895/4249). SCT prevalence was significantly larger for the Bantu population (21.7%, n=860/3959) than for the Pygmy population (12.1%, n=35/290), (p=0.00013). In addition, the presence of Plasmodium sp. was assessed via thick blood examination. Age was positively associated with SCT prevalence (odds-ratio for an increase of 10 years in age=1.063, p=0.020). Sex was not associated with SCT prevalence. The study reveals the absence of homozygous sickle-cell patients, and marked differences in SCT prevalence between the Gabonese provinces, and also between population groups (Bantu vs Pygmy). These findings could be used by the public health authorities to allocate medical resources and target prevention campaigns.
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Affiliation(s)
- Lucrèce M Délicat-Loembet
- Centre International de Recherches Médicales de Franceville, CIRMF, BP 769 Franceville, Gabon; MIVEGEC (UMR CNRS/IRD/UM1/UM2 5290) CHRU de Montpellier, 39 Av. C. Flahault, 34295 Montpellier, France
| | - Eric Elguero
- MIVEGEC (UMR CNRS/IRD/UM1/UM2 5290) CHRU de Montpellier, 39 Av. C. Flahault, 34295 Montpellier, France.
| | - Céline Arnathau
- MIVEGEC (UMR CNRS/IRD/UM1/UM2 5290) CHRU de Montpellier, 39 Av. C. Flahault, 34295 Montpellier, France
| | - Patrick Durand
- MIVEGEC (UMR CNRS/IRD/UM1/UM2 5290) CHRU de Montpellier, 39 Av. C. Flahault, 34295 Montpellier, France
| | - Benjamin Ollomo
- Centre International de Recherches Médicales de Franceville, CIRMF, BP 769 Franceville, Gabon
| | - Simon Ossari
- Centre International de Recherches Médicales de Franceville, CIRMF, BP 769 Franceville, Gabon
| | - Jérôme Mezui-me-ndong
- Centre International de Recherches Médicales de Franceville, CIRMF, BP 769 Franceville, Gabon
| | - Thélesfort Mbang Mboro
- Centre International de Recherches Médicales de Franceville, CIRMF, BP 769 Franceville, Gabon
| | - Pierre Becquart
- MIVEGEC (UMR CNRS/IRD/UM1/UM2 5290) CHRU de Montpellier, 39 Av. C. Flahault, 34295 Montpellier, France
| | - Dieudonné Nkoghe
- Centre International de Recherches Médicales de Franceville, CIRMF, BP 769 Franceville, Gabon
| | - Eric Leroy
- Centre International de Recherches Médicales de Franceville, CIRMF, BP 769 Franceville, Gabon; MIVEGEC (UMR CNRS/IRD/UM1/UM2 5290) CHRU de Montpellier, 39 Av. C. Flahault, 34295 Montpellier, France
| | - Lucas Sica
- Centre International de Recherches Médicales de Franceville, CIRMF, BP 769 Franceville, Gabon
| | - Jean-Paul Gonzalez
- Centre International de Recherches Médicales de Franceville, CIRMF, BP 769 Franceville, Gabon; METABIOTA, Emerging Diseases & Biosecurity, Washington, DC, USA
| | - Franck Prugnolle
- Centre International de Recherches Médicales de Franceville, CIRMF, BP 769 Franceville, Gabon; MIVEGEC (UMR CNRS/IRD/UM1/UM2 5290) CHRU de Montpellier, 39 Av. C. Flahault, 34295 Montpellier, France
| | - François Renaud
- Centre International de Recherches Médicales de Franceville, CIRMF, BP 769 Franceville, Gabon; MIVEGEC (UMR CNRS/IRD/UM1/UM2 5290) CHRU de Montpellier, 39 Av. C. Flahault, 34295 Montpellier, France
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Dalmas F, Genevaz N, Roth M, Jestin J, Leroy E. 3D Dispersion of Spherical Silica Nanoparticles in Polymer Nanocomposites: A Quantitative Study by Electron Tomography. Macromolecules 2014. [DOI: 10.1021/ma500075s] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Florent Dalmas
- ICMPE (Institut
de Chimie et des Matériaux Paris-Est), UMR 7182, CNRS/Université Paris-Est Créteil, 2-8 rue Henri Dunant, 94320 Thiais, France
| | - Nicolas Genevaz
- LLB (Laboratoire Léon Brillouin), CEA Saclay, 91191 Gif-sur-Yvette, Cedex, France
| | - Matthias Roth
- ICMPE (Institut
de Chimie et des Matériaux Paris-Est), UMR 7182, CNRS/Université Paris-Est Créteil, 2-8 rue Henri Dunant, 94320 Thiais, France
| | - Jacques Jestin
- LLB (Laboratoire Léon Brillouin), CEA Saclay, 91191 Gif-sur-Yvette, Cedex, France
| | - Eric Leroy
- ICMPE (Institut
de Chimie et des Matériaux Paris-Est), UMR 7182, CNRS/Université Paris-Est Créteil, 2-8 rue Henri Dunant, 94320 Thiais, France
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50
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Abstract
Simple quaternary ammonium salts combined with glycols form effective modifiers that produce flexible thermoplastic starch which has mechanical properties comparable to some polyolefin plastics.
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Affiliation(s)
| | | | | | - Franziska Emmerling
- BAM Bundesanstalt für Materialforschung und –prüfung 1.3 Strukturanalytik
- Berlin-Adlershof, Germany
| | - Denis Lourdin
- UR1268 Biopolymères Interactions Assemblages
- INRA
- F-44300 Nantes, France
| | - Eric Leroy
- LUNAM Université
- CNRS
- GEPEA
- 44606 St Nazaire Cedex, France
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