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Allouch A, Mougenot J, Michau A, Prasanna S, Brault P, Maurel F, Hassouni K. Investigation of fullerene cluster growth mechanisms by carbon atom addition using classical molecular dynamics. J Chem Phys 2023; 159:154303. [PMID: 37861124 DOI: 10.1063/5.0166116] [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] [Received: 07/03/2023] [Accepted: 09/28/2023] [Indexed: 10/21/2023] Open
Abstract
The mechanisms of carbon sticking reactions to C36 and C-C80 fullerenes were investigated with molecular dynamics simulations (MD) using the Second-generation Reactive Empirical Bond Order (SREBO) and Adaptive Intermolecular Reactive Empirical Bond Order (AIREBO) potentials that were specifically optimized for carbon-carbon interactions. Results showed the existence of three possible sticking configurations where the projectile atom can stick either to one, two or three atoms of the target fullerene. They also showed that although the two potentials give similar magnitudes for the sticking cross-sections, they yield fairly different results as far as sticking mechanisms and configurations at thermal collision-energies, i.e., in the range 0.05-0.5 eV, are concerned. While AIREBO, that takes into account the long-range Lennard-Jones interaction, essentially results in a surface-sticking configuration with a single atom of the target fullerene, SREBO potential yields both surface- and two neighbors-sticking (2N-sticking) configurations. The fullerene structure is preserved in the last configuration while it can be recovered by a 2000 K annealing in the former configuration. Results obtained with SREBO eventually showed larger sticking probabilities for C36 as compared with C80. In spite of this, the sticking cross-sections obtained for C80 are similar to or even larger than those obtained for C36 due to the larger size of C80 that compensates for its smaller sticking probabilities.
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Affiliation(s)
- A Allouch
- Laboratoire des Sciences des Procédés et des Matériaux (LSPM), CNRS UPR 3407, Université Sorbonne Paris Nord, Villetaneuse, France
| | - J Mougenot
- Laboratoire des Sciences des Procédés et des Matériaux (LSPM), CNRS UPR 3407, Université Sorbonne Paris Nord, Villetaneuse, France
| | - A Michau
- Laboratoire des Sciences des Procédés et des Matériaux (LSPM), CNRS UPR 3407, Université Sorbonne Paris Nord, Villetaneuse, France
| | - S Prasanna
- Laboratoire des Sciences des Procédés et des Matériaux (LSPM), CNRS UPR 3407, Université Sorbonne Paris Nord, Villetaneuse, France
| | - P Brault
- Groupe de Recherches sur l'Energétique des Milieux Ionisés, CNRS UMR 7344, Université d'Orléans, Orléans, France
| | - F Maurel
- Laboratoire Interfaces, Traitements, Organisation et Dynamique des Systèmes (ITODYS), UMR 7086, Université Paris Diderot, Paris, France
| | - K Hassouni
- Laboratoire des Sciences des Procédés et des Matériaux (LSPM), CNRS UPR 3407, Université Sorbonne Paris Nord, Villetaneuse, France
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Michau A, Lafont C, Bargi-Souza P, Kemkem Y, Guillou A, Ravier MA, Bertrand G, Varrault A, Fiordelisio T, Hodson DJ, Mollard P, Schaeffer M. Metabolic Stress Impairs Pericyte Response to Optogenetic Stimulation in Pancreatic Islets. Front Endocrinol (Lausanne) 2022; 13:918733. [PMID: 35813647 PMCID: PMC9259887 DOI: 10.3389/fendo.2022.918733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 05/23/2022] [Indexed: 11/13/2022] Open
Abstract
Pancreatic islets are highly vascularized micro-organs ensuring whole body glucose homeostasis. Islet vascular cells play an integral part in sustaining adequate insulin release by beta cells. In particular, recent studies have demonstrated that islet pericytes regulate local blood flow velocity and are required for maintenance of beta cell maturity and function. In addition, increased metabolic demand accompanying obesity alters islet pericyte morphology. Here, we sought to explore the effects of metabolic stress on islet pericyte functional response to stimulation in a mouse model of type 2 diabetes, directly in the pancreas in vivo . We found that high fat diet induced islet pericyte hypertrophy without alterations in basal local blood flow. However, optogenetic stimulation of pericyte activity revealed impaired islet vascular responses, despite increased expression of genes encoding proteins directly or indirectly involved in cell contraction. These findings suggest that metabolic stress impinges upon islet pericyte function, which may contribute to beta cell failure during T2D.
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Affiliation(s)
- Aurélien Michau
- Institute of Functional Genomics, Univ. Montpellier, CNRS, INSERM, Montpellier, France
| | - Chrystel Lafont
- Institute of Functional Genomics, Univ. Montpellier, CNRS, INSERM, Montpellier, France
| | - Paula Bargi-Souza
- Institute of Functional Genomics, Univ. Montpellier, CNRS, INSERM, Montpellier, France
- Department of Physiology and Biophysics of the Institute of Biological Sciences, Federal University of Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Yasmine Kemkem
- Institute of Functional Genomics, Univ. Montpellier, CNRS, INSERM, Montpellier, France
| | - Anne Guillou
- Institute of Functional Genomics, Univ. Montpellier, CNRS, INSERM, Montpellier, France
| | - Magalie A. Ravier
- Institute of Functional Genomics, Univ. Montpellier, CNRS, INSERM, Montpellier, France
| | - Gyslaine Bertrand
- Institute of Functional Genomics, Univ. Montpellier, CNRS, INSERM, Montpellier, France
| | - Annie Varrault
- Institute of Functional Genomics, Univ. Montpellier, CNRS, INSERM, Montpellier, France
| | - Tatiana Fiordelisio
- Institute of Functional Genomics, Univ. Montpellier, CNRS, INSERM, Montpellier, France
- Laboratorio de Neuroendocrinología Comparada, Laboratorio Nacional de Soluciones Biomiméticas para Diagnóstico y Terapia LaNSBioDyT, Facultad de Ciencias, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - David J. Hodson
- Oxford Centre for Diabetes, Endocrinology and Metabolism (OCDEM), National Institute for Health and Care Research (NIHR) Oxford Biomedical Research Centre, Churchill Hospital, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Patrice Mollard
- Institute of Functional Genomics, Univ. Montpellier, CNRS, INSERM, Montpellier, France
| | - Marie Schaeffer
- Institute of Functional Genomics, Univ. Montpellier, CNRS, INSERM, Montpellier, France
- Centre de Biologie Structurale, CNRS UMR 5048, INSERM U1054, Univ Montpellier, Montpellier, France
- *Correspondence: Marie Schaeffer,
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Allouch A, Mougenot J, Prasanna S, Michau A, Seydou M, Maurel F, Brault P, Hassouni K. Statistical abundance and stability of carbon nanostructures by combined condensation-annealing molecular dynamics simulations. COMPUT THEOR CHEM 2021. [DOI: 10.1016/j.comptc.2021.113252] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Abdelkafi H, Michau A, Pons V, Ngadjeua F, Clerget A, Ait Ouarab L, Buisson DA, Montoir D, Caramelle L, Gillet D, Barbier J, Cintrat JC. Structure-Activity Relationship Studies of Retro-1 Analogues against Shiga Toxin. J Med Chem 2020; 63:8114-8133. [PMID: 32648758 DOI: 10.1021/acs.jmedchem.0c00298] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
High-throughput screening has shown that Retro-1 inhibits ricin and Shiga toxins by diminishing their intracellular trafficking via the retrograde route, from early endosomes to the Golgi apparatus. To improve the activity of Retro-1, a structure-activity relationship (SAR) study was undertaken and yielded an analogue with a roughly 70-fold better half-maximal effective concentration (EC50) against Shiga toxin cytotoxicity measured in a cell protein synthesis assay.
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Affiliation(s)
- Hajer Abdelkafi
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SCBM, 91191 Gif-sur-Yvette, France
| | - Aurélien Michau
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SIMoS, 91191 Gif-sur-Yvette, France
| | - Valérie Pons
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SCBM, 91191 Gif-sur-Yvette, France
| | - Flora Ngadjeua
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SIMoS, 91191 Gif-sur-Yvette, France
| | - Alexandra Clerget
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SIMoS, 91191 Gif-sur-Yvette, France
| | - Lilia Ait Ouarab
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SCBM, 91191 Gif-sur-Yvette, France
| | - David-Alexandre Buisson
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SCBM, 91191 Gif-sur-Yvette, France
| | - David Montoir
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SCBM, 91191 Gif-sur-Yvette, France
| | - Lucie Caramelle
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SIMoS, 91191 Gif-sur-Yvette, France
| | - Daniel Gillet
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SIMoS, 91191 Gif-sur-Yvette, France
| | - Julien Barbier
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SIMoS, 91191 Gif-sur-Yvette, France
| | - Jean-Christophe Cintrat
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SCBM, 91191 Gif-sur-Yvette, France
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Quiros C, Mougenot J, Bisson R, Redolfi M, Michau A, Hassouni K, Lombardi G. Blistering and hydrogen retention in poly- and single- crystals of aluminum by a joint experimental-modeling approach. Nuclear Materials and Energy 2019. [DOI: 10.1016/j.nme.2019.100675] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Tepshi L, Gupta N, Noel R, Goudet A, Hinsinger K, Michau A, Pons V, Abdelkafi H, Secher T, Shima A, Shtanko O, Sakurai Y, Cojean S, Pomel S, Lievin-Le Moal V, Leignel V, Herweg JA, Fischer A, Johannes L, Harrison K, Beard PM, Rudel T, Vacus J, Loiseau PM, Davey RA, Oswald E, Cintrat JC, Barbier J, Gillet D. Retro-2, a small molecule able to protect cells against a broad spectrum of menacing agents: Toxins, viruses, parasites and intracellular bacteria. Toxicon 2018. [DOI: 10.1016/j.toxicon.2017.12.036] [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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Espinosa-Carrasco G, Le Saout C, Fontanaud P, Michau A, Mollard P, Hernandez J, Schaeffer M. Integrin β1 Optimizes Diabetogenic T Cell Migration and Function in the Pancreas. Front Immunol 2018; 9:1156. [PMID: 29904378 PMCID: PMC5990596 DOI: 10.3389/fimmu.2018.01156] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 05/08/2018] [Indexed: 01/08/2023] Open
Abstract
T cell search behavior is dictated by their need to encounter their specific antigen to eliminate target cells. However, mechanisms controlling effector T cell motility are highly tissue-dependent. Specifically, how diabetogenic T cells encounter their target beta cells in dispersed islets throughout the pancreas (PA) during autoimmune diabetes remains unclear. Using intra-vital 2-photon microscopy in a mouse model of diabetes, we found that CXCR3 chemokine downregulated CD8+ T cell motility specifically within islets, promoting effector cell confinement to their target sites. By contrast, T cell velocity and directionality in the exocrine tissue were enhanced along blood vessels and extracellular matrix fibers. This guided migration implicated integrin-dependent interactions, since integrin blockade impaired exocrine T cell motility. In addition, integrin β1 blockade decreased CD4+ T cell effector phenotype specifically in the PA. Thus, we unveil an important role for integrins in the PA during autoimmune diabetes that may have important implications for the design of new therapies.
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Affiliation(s)
- Gabriel Espinosa-Carrasco
- INSERM U1183, Institute for Regenerative Medicine and Biotherapy, University of Montpellier, Montpellier, France.,Institute of Functional Genomics, University of Montpellier, CNRS, INSERM, Montpellier, France
| | - Cécile Le Saout
- INSERM U1183, Institute for Regenerative Medicine and Biotherapy, University of Montpellier, Montpellier, France
| | - Pierre Fontanaud
- Institute of Functional Genomics, University of Montpellier, CNRS, INSERM, Montpellier, France
| | - Aurélien Michau
- Institute of Functional Genomics, University of Montpellier, CNRS, INSERM, Montpellier, France
| | - Patrice Mollard
- Institute of Functional Genomics, University of Montpellier, CNRS, INSERM, Montpellier, France
| | - Javier Hernandez
- INSERM U1183, Institute for Regenerative Medicine and Biotherapy, University of Montpellier, Montpellier, France
| | - Marie Schaeffer
- Institute of Functional Genomics, University of Montpellier, CNRS, INSERM, Montpellier, France
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8
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Quirós C, Mougenot J, Lombardi G, Redolfi M, Brinza O, Charles Y, Michau A, Hassouni K. Blister formation and hydrogen retention in aluminium and beryllium: A modeling and experimental approach. Nuclear Materials and Energy 2017. [DOI: 10.1016/j.nme.2016.12.036] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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9
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Prasanna S, Michau A, Rond C, Farhat S, Hassouni K, Gicquel A. Effect of methane on stability of plasma in a MW-assisted hydrogen-methane plasma. EPJ Web Conf 2017. [DOI: 10.1051/epjconf/201714902020] [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: 11/14/2022] Open
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10
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Gupta N, Noël R, Goudet A, Hinsinger K, Michau A, Pons V, Abdelkafi H, Secher T, Shima A, Shtanko O, Sakurai Y, Cojean S, Pomel S, Liévin-Le Moal V, Leignel V, Herweg JA, Fischer A, Johannes L, Harrison K, Beard PM, Clayette P, Le Grand R, Rayner JO, Rudel T, Vacus J, Loiseau PM, Davey RA, Oswald E, Cintrat JC, Barbier J, Gillet D. Inhibitors of retrograde trafficking active against ricin and Shiga toxins also protect cells from several viruses, Leishmania and Chlamydiales. Chem Biol Interact 2016; 267:96-103. [PMID: 27712998 DOI: 10.1016/j.cbi.2016.10.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Revised: 08/09/2016] [Accepted: 10/03/2016] [Indexed: 11/25/2022]
Abstract
Medical countermeasures to treat biothreat agent infections require broad-spectrum therapeutics that do not induce agent resistance. A cell-based high-throughput screen (HTS) against ricin toxin combined with hit optimization allowed selection of a family of compounds that meet these requirements. The hit compound Retro-2 and its derivatives have been demonstrated to be safe in vivo in mice even at high doses. Moreover, Retro-2 is an inhibitor of retrograde transport that affects syntaxin-5-dependent toxins and pathogens. As a consequence, it has a broad-spectrum activity that has been demonstrated both in vitro and in vivo against ricin, Shiga toxin-producing O104:H4 entero-hemorrhagic E. coli and Leishmania sp. and in vitro against Ebola, Marburg and poxviruses and Chlamydiales. An effect is anticipated on other toxins or pathogens that use retrograde trafficking and syntaxin-5. Since Retro-2 targets cell components of the host and not directly the pathogen, no selection of resistant pathogens is expected. These lead compounds need now to be developed as drugs for human use.
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Affiliation(s)
- Neetu Gupta
- Institute of Biology and Technology of Saclay (IBITECS), CEA, LabEx LERMIT, Université Paris-Saclay, F-91191, Gif Sur Yvette, France
| | - Romain Noël
- Institute of Biology and Technology of Saclay (IBITECS), CEA, LabEx LERMIT, Université Paris-Saclay, F-91191, Gif Sur Yvette, France
| | - Amélie Goudet
- Institute of Biology and Technology of Saclay (IBITECS), CEA, LabEx LERMIT, Université Paris-Saclay, F-91191, Gif Sur Yvette, France
| | - Karen Hinsinger
- Institute of Biology and Technology of Saclay (IBITECS), CEA, LabEx LERMIT, Université Paris-Saclay, F-91191, Gif Sur Yvette, France
| | - Aurélien Michau
- Institute of Biology and Technology of Saclay (IBITECS), CEA, LabEx LERMIT, Université Paris-Saclay, F-91191, Gif Sur Yvette, France
| | - Valérie Pons
- Institute of Biology and Technology of Saclay (IBITECS), CEA, LabEx LERMIT, Université Paris-Saclay, F-91191, Gif Sur Yvette, France
| | - Hajer Abdelkafi
- Institute of Biology and Technology of Saclay (IBITECS), CEA, LabEx LERMIT, Université Paris-Saclay, F-91191, Gif Sur Yvette, France
| | | | | | - Olena Shtanko
- Texas Biomedical Research Institute, San Antonio, TX, USA
| | | | - Sandrine Cojean
- Antiparasitic Chemotherapy, UMR 8076, CNRS BioCIS, LabEx LERMIT, Université Paris-Sud, Université Paris-Saclay, F-92290, Chatenay-Malabry, France
| | - Sébastien Pomel
- Antiparasitic Chemotherapy, UMR 8076, CNRS BioCIS, LabEx LERMIT, Université Paris-Sud, Université Paris-Saclay, F-92290, Chatenay-Malabry, France
| | - Vanessa Liévin-Le Moal
- Antiparasitic Chemotherapy, UMR 8076, CNRS BioCIS, LabEx LERMIT, Université Paris-Sud, Université Paris-Saclay, F-92290, Chatenay-Malabry, France
| | - Véronique Leignel
- DRUGABILIS (French Research Performer SME), F-92290, Chatenay-Malabry, France
| | - Jo-Ana Herweg
- University of Würzburg, Biocenter, Chair of Microbiology, Am Hubland, D-97074, Würzburg, Germany
| | - Annette Fischer
- University of Würzburg, Biocenter, Chair of Microbiology, Am Hubland, D-97074, Würzburg, Germany
| | - Ludger Johannes
- Institut Curie, PSL Research University, Endocytic Trafficking and Therapeutic Delivery Group, 26 rue d'Ulm, F-75248, Paris Cedex 05, France; CNRS, UMR3666, F-75005, Paris, France; INSERM, U1143, F-75005, Paris, France
| | - Kate Harrison
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Roslin, Midlothian, EH25 9RG, United Kingdom
| | - Philippa M Beard
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Roslin, Midlothian, EH25 9RG, United Kingdom; The Pirbright Institute, Ash Rd, Pirbright, Surrey GH24 0NF, United Kingdom
| | - Pascal Clayette
- ImmunoPharmacology and Biosafety Laboratory, BERTIN Pharma, CEA, F-92265, Fontenay-aux-Roses, France
| | - Roger Le Grand
- Institute of Emerging Diseases and Innovative Therapies, CEA, U1184, Immunology of Viral Infections and Autoimmune Diseases, Infectious Disease Models and Innovative Therapies Infrastructure, F-92265, Fontenay-aux-Roses, France; INSERM, U1184, F-94276, Le Kremlin-Bicêtre, France; University of Paris South, U1184, F-92265, Fontenay-aux-Roses, France; Vaccine Research Institute, Henri Mondor Hospital, F-94010, Créteil, France
| | - Jonathan O Rayner
- Infectious Disease Research, Southern Research, 2000 Ninth Avenue South, Birmingham, AL 35205, USA
| | - Thomas Rudel
- University of Würzburg, Biocenter, Chair of Microbiology, Am Hubland, D-97074, Würzburg, Germany
| | - Joël Vacus
- DRUGABILIS (French Research Performer SME), F-92290, Chatenay-Malabry, France
| | - Philippe M Loiseau
- Antiparasitic Chemotherapy, UMR 8076, CNRS BioCIS, LabEx LERMIT, Université Paris-Sud, Université Paris-Saclay, F-92290, Chatenay-Malabry, France
| | - Robert A Davey
- Texas Biomedical Research Institute, San Antonio, TX, USA
| | | | - Jean-Christophe Cintrat
- Institute of Biology and Technology of Saclay (IBITECS), CEA, LabEx LERMIT, Université Paris-Saclay, F-91191, Gif Sur Yvette, France
| | - Julien Barbier
- Institute of Biology and Technology of Saclay (IBITECS), CEA, LabEx LERMIT, Université Paris-Saclay, F-91191, Gif Sur Yvette, France
| | - Daniel Gillet
- Institute of Biology and Technology of Saclay (IBITECS), CEA, LabEx LERMIT, Université Paris-Saclay, F-91191, Gif Sur Yvette, France.
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Michau A, Hodson DJ, Fontanaud P, Guillou A, Espinosa-Carrasco G, Molino F, Peters CJ, Robinson IC, Le Tissier P, Mollard P, Schaeffer M. Metabolism Regulates Exposure of Pancreatic Islets to Circulating Molecules In Vivo. Diabetes 2016; 65:463-75. [PMID: 26581596 DOI: 10.2337/db15-1168] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Accepted: 11/10/2015] [Indexed: 11/13/2022]
Abstract
Pancreatic β-cells modulate insulin secretion through rapid sensing of blood glucose and integration of gut-derived signals. Increased insulin demand during pregnancy and obesity alters islet function and mass and leads to gestational diabetes mellitus and type 2 diabetes in predisposed individuals. However, it is unclear how blood-borne factors dynamically access the islets of Langerhans. Thus, understanding the changes in circulating molecule distribution that accompany compensatory β-cell expansion may be key to developing novel antidiabetic therapies. Here, using two-photon microscopy in vivo in mice, we demonstrate that islets are almost instantly exposed to peaks of circulating molecules, which rapidly pervade the tissue before clearance. In addition, both gestation and short-term high-fat-diet feeding decrease molecule extravasation and uptake rates in vivo in islets, independently of β-cell expansion or islet blood flow velocity. Together, these data support a role for islet vascular permeability in shaping β-cell adaptive responses to metabolic demand by modulating the access and sensing of circulating molecules.
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Affiliation(s)
- Aurélien Michau
- Centre National de la Recherche Scientifique (CNRS), UMR-5203, Institut de Génomique Fonctionnelle, Montpellier, France INSERM, U1191, Montpellier, France University of Montpellier, Montpellier, France
| | - David J Hodson
- Centre National de la Recherche Scientifique (CNRS), UMR-5203, Institut de Génomique Fonctionnelle, Montpellier, France INSERM, U1191, Montpellier, France University of Montpellier, Montpellier, France Section of Cell Biology and Functional Genomics, Department of Medicine, Imperial College London, Imperial Centre for Translational and Experimental Medicine, Hammersmith Hospital, London, U.K. Institute of Metabolism and Systems Research, University of Birmingham, Birmingham, U.K
| | - Pierre Fontanaud
- Centre National de la Recherche Scientifique (CNRS), UMR-5203, Institut de Génomique Fonctionnelle, Montpellier, France INSERM, U1191, Montpellier, France University of Montpellier, Montpellier, France
| | - Anne Guillou
- Centre National de la Recherche Scientifique (CNRS), UMR-5203, Institut de Génomique Fonctionnelle, Montpellier, France INSERM, U1191, Montpellier, France University of Montpellier, Montpellier, France
| | - Gabriel Espinosa-Carrasco
- Centre National de la Recherche Scientifique (CNRS), UMR-5203, Institut de Génomique Fonctionnelle, Montpellier, France INSERM, U1191, Montpellier, France University of Montpellier, Montpellier, France Lymphocyte Differentiation, Tolerance, and Metabolism Laboratory, Institute for Regenerative Medicine and Biotherapy, U1183, Montpellier, France
| | - François Molino
- Centre National de la Recherche Scientifique (CNRS), UMR-5203, Institut de Génomique Fonctionnelle, Montpellier, France INSERM, U1191, Montpellier, France University of Montpellier, Montpellier, France Charles Coulomb Laboratory, University of Montpellier, CNRS, UMR-5221, Montpellier, France
| | - Catherine J Peters
- Division of Molecular Neuroendocrinology, National Institute for Medical Research, London, U.K
| | - Iain C Robinson
- Division of Molecular Neuroendocrinology, National Institute for Medical Research, London, U.K
| | - Paul Le Tissier
- Centre for Integrative Physiology, University of Edinburgh, Edinburgh, U.K
| | - Patrice Mollard
- Centre National de la Recherche Scientifique (CNRS), UMR-5203, Institut de Génomique Fonctionnelle, Montpellier, France INSERM, U1191, Montpellier, France University of Montpellier, Montpellier, France
| | - Marie Schaeffer
- Centre National de la Recherche Scientifique (CNRS), UMR-5203, Institut de Génomique Fonctionnelle, Montpellier, France INSERM, U1191, Montpellier, France University of Montpellier, Montpellier, France
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12
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Istomin SY, Karakulina OM, Rozova MG, Kazakov SM, Gippius AA, Antipov EV, Bobrikov IA, Balagurov AM, Tsirlin AA, Michau A, Biendicho JJ, Svensson G. Tuning the high-temperature properties of Pr2NiO4+δby simultaneous Pr- and Ni-cation replacement. RSC Adv 2016. [DOI: 10.1039/c6ra03099h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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13
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Abdelkafi H, Michau A, Clerget A, Buisson DA, Johannes L, Gillet D, Barbier J, Cintrat JC. Inside Cover: Synthesis, Chiral Separation, Absolute Configuration Assignment, and Biological Activity of Enantiomers of Retro-1 as Potent Inhibitors of Shiga Toxin (ChemMedChem 7/2015). ChemMedChem 2015. [DOI: 10.1002/cmdc.201590020] [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: 11/09/2022]
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14
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Abdelkafi H, Michau A, Clerget A, Buisson DA, Johannes L, Gillet D, Barbier J, Cintrat JC. Synthesis, Chiral Separation, Absolute Configuration Assignment, and Biological Activity of Enantiomers of Retro-1 as Potent Inhibitors of Shiga Toxin. ChemMedChem 2015; 10:1153-6. [PMID: 26033849 DOI: 10.1002/cmdc.201500139] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Indexed: 01/18/2023]
Abstract
The Shiga toxin (Stx) family is composed of related protein toxins produced by the bacteria Shigella dysenteriae and certain pathogenic strains of E. coli. No effective therapies for Stx intoxication have been developed yet. However, inhibitors that act on the intracellular trafficking of these toxins may provide new options for the development of therapeutic strategies. This study reports the synthesis, chromatographic separation, and pharmacological evaluation of the two enantiomers of Retro-1, a compound active against Stx and other such protein toxins. Retro-1 works by inhibiting retrograde transport of these toxins inside cells. In vitro experiments proved that the configuration of the stereocenter at position 5 is not crucial for the activity of this compound. X-ray diffraction data revealed (S)-Retro-1 to be slightly more active than (R)-Retro-1.
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Affiliation(s)
- Hajer Abdelkafi
- CEA, iBiTec-S/SCBM, CEA-Saclay, LabEx LERMIT, 91191 Gif-sur-Yvette (France)
| | - Aurélien Michau
- CEA, iBiTec-S/SIMOPRO, CEA-Saclay, LabEx LERMIT, 91191 Gif-sur-Yvette (France)
| | - Alexandra Clerget
- CEA, iBiTec-S/SIMOPRO, CEA-Saclay, LabEx LERMIT, 91191 Gif-sur-Yvette (France)
| | | | - Ludger Johannes
- Institut Curie, PSL Research University, Chemical Biology of Membranes and Therapeutic Delivery unit 26 rue d'Ulm, 75248 Paris Cedex 05 (France).,CNRS UMR3666, 75005 Paris (France).,INSERM U1143, 75005 Paris (France)
| | - Daniel Gillet
- CEA, iBiTec-S/SIMOPRO, CEA-Saclay, LabEx LERMIT, 91191 Gif-sur-Yvette (France).
| | - Julien Barbier
- CEA, iBiTec-S/SIMOPRO, CEA-Saclay, LabEx LERMIT, 91191 Gif-sur-Yvette (France)
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15
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Gupta N, Pons V, Noël R, Buisson DA, Michau A, Johannes L, Gillet D, Barbier J, Cintrat JC. (S)-N-Methyldihydroquinazolinones are the Active Enantiomers of Retro-2 Derived Compounds against Toxins. ACS Med Chem Lett 2014; 5:94-7. [PMID: 24900779 DOI: 10.1021/ml400457j] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Accepted: 12/04/2013] [Indexed: 01/08/2023] Open
Abstract
This study reports the synthesis, chromatographic separation, and pharmacological evaluation of the two enantiomers of a new compound, named Retro-2.1, active against toxins by inhibiting intracellular trafficking via the retrograde route. The absolute configuration of the bioactive enantiomer has been assigned from X-ray diffraction to the (S)-enantiomer. To date, (S)-Retro-2.1 is the most potent molecule to counteract the cytotoxic potential of ricin and Shiga toxin, with EC50 values of 23 and 54 nM, respectively.
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Affiliation(s)
- Neetu Gupta
- CEA, iBiTec-S/SIMOPRO,
CEA-Saclay, LabEx LERMIT, F-91191 Gif-sur-Yvette, France
- CEA, iBiTec-S/SCBM,
CEA-Saclay, LabEx LERMIT, F-91191 Gif-sur-Yvette, France
- U1143 INSERM, 75005 Paris, France
- Institut
Curie,
Centre de Recherche, Chemical Biology of Membranes and Therapeutic
Delivery, 26 Rue d’Ulm, 75248 Paris Cedex 05, France
| | - Valérie Pons
- CEA, iBiTec-S/SIMOPRO,
CEA-Saclay, LabEx LERMIT, F-91191 Gif-sur-Yvette, France
- CEA, iBiTec-S/SCBM,
CEA-Saclay, LabEx LERMIT, F-91191 Gif-sur-Yvette, France
- U1143 INSERM, 75005 Paris, France
- Institut
Curie,
Centre de Recherche, Chemical Biology of Membranes and Therapeutic
Delivery, 26 Rue d’Ulm, 75248 Paris Cedex 05, France
| | - Romain Noël
- CEA, iBiTec-S/SIMOPRO,
CEA-Saclay, LabEx LERMIT, F-91191 Gif-sur-Yvette, France
- CEA, iBiTec-S/SCBM,
CEA-Saclay, LabEx LERMIT, F-91191 Gif-sur-Yvette, France
- U1143 INSERM, 75005 Paris, France
- Institut
Curie,
Centre de Recherche, Chemical Biology of Membranes and Therapeutic
Delivery, 26 Rue d’Ulm, 75248 Paris Cedex 05, France
| | - David-Alexandre Buisson
- CEA, iBiTec-S/SIMOPRO,
CEA-Saclay, LabEx LERMIT, F-91191 Gif-sur-Yvette, France
- CEA, iBiTec-S/SCBM,
CEA-Saclay, LabEx LERMIT, F-91191 Gif-sur-Yvette, France
- U1143 INSERM, 75005 Paris, France
- Institut
Curie,
Centre de Recherche, Chemical Biology of Membranes and Therapeutic
Delivery, 26 Rue d’Ulm, 75248 Paris Cedex 05, France
| | - Aurélien Michau
- CEA, iBiTec-S/SIMOPRO,
CEA-Saclay, LabEx LERMIT, F-91191 Gif-sur-Yvette, France
- CEA, iBiTec-S/SCBM,
CEA-Saclay, LabEx LERMIT, F-91191 Gif-sur-Yvette, France
- U1143 INSERM, 75005 Paris, France
- Institut
Curie,
Centre de Recherche, Chemical Biology of Membranes and Therapeutic
Delivery, 26 Rue d’Ulm, 75248 Paris Cedex 05, France
| | - Ludger Johannes
- CEA, iBiTec-S/SIMOPRO,
CEA-Saclay, LabEx LERMIT, F-91191 Gif-sur-Yvette, France
- CEA, iBiTec-S/SCBM,
CEA-Saclay, LabEx LERMIT, F-91191 Gif-sur-Yvette, France
- U1143 INSERM, 75005 Paris, France
- Institut
Curie,
Centre de Recherche, Chemical Biology of Membranes and Therapeutic
Delivery, 26 Rue d’Ulm, 75248 Paris Cedex 05, France
| | - Daniel Gillet
- CEA, iBiTec-S/SIMOPRO,
CEA-Saclay, LabEx LERMIT, F-91191 Gif-sur-Yvette, France
- CEA, iBiTec-S/SCBM,
CEA-Saclay, LabEx LERMIT, F-91191 Gif-sur-Yvette, France
- U1143 INSERM, 75005 Paris, France
- Institut
Curie,
Centre de Recherche, Chemical Biology of Membranes and Therapeutic
Delivery, 26 Rue d’Ulm, 75248 Paris Cedex 05, France
| | - Julien Barbier
- CEA, iBiTec-S/SIMOPRO,
CEA-Saclay, LabEx LERMIT, F-91191 Gif-sur-Yvette, France
- CEA, iBiTec-S/SCBM,
CEA-Saclay, LabEx LERMIT, F-91191 Gif-sur-Yvette, France
- U1143 INSERM, 75005 Paris, France
- Institut
Curie,
Centre de Recherche, Chemical Biology of Membranes and Therapeutic
Delivery, 26 Rue d’Ulm, 75248 Paris Cedex 05, France
| | - Jean-Christophe Cintrat
- CEA, iBiTec-S/SIMOPRO,
CEA-Saclay, LabEx LERMIT, F-91191 Gif-sur-Yvette, France
- CEA, iBiTec-S/SCBM,
CEA-Saclay, LabEx LERMIT, F-91191 Gif-sur-Yvette, France
- U1143 INSERM, 75005 Paris, France
- Institut
Curie,
Centre de Recherche, Chemical Biology of Membranes and Therapeutic
Delivery, 26 Rue d’Ulm, 75248 Paris Cedex 05, France
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Gupta N, Noël R, Pons V, Goudet A, Martinez J, Garcia-Castillo D, Michau A, Johannes L, Gillet D, Barbier J, Cintrat J. Development of potent small-molecule inhibitors of Shiga toxin. Toxicon 2013. [DOI: 10.1016/j.toxicon.2013.08.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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17
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Michau A, Guillemain G, Grosfeld A, Vuillaumier-Barrot S, Grand T, Keck M, L'Hoste S, Chateau D, Serradas P, Teulon J, De Lonlay P, Scharfmann R, Brot-Laroche E, Leturque A, Le Gall M. Mutations in SLC2A2 gene reveal hGLUT2 function in pancreatic β cell development. J Biol Chem 2013; 288:31080-92. [PMID: 23986439 DOI: 10.1074/jbc.m113.469189] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The structure-function relationships of sugar transporter-receptor hGLUT2 coded by SLC2A2 and their impact on insulin secretion and β cell differentiation were investigated through the detailed characterization of a panel of mutations along the protein. We studied naturally occurring SLC2A2 variants or mutants: two single-nucleotide polymorphisms and four proposed inactivating mutations associated to Fanconi-Bickel syndrome. We also engineered mutations based on sequence alignment and conserved amino acids in selected domains. The single-nucleotide polymorphisms P68L and T110I did not impact on sugar transport as assayed in Xenopus oocytes. All the Fanconi-Bickel syndrome-associated mutations invalidated glucose transport by hGLUT2 either through absence of protein at the plasma membrane (G20D and S242R) or through loss of transport capacity despite membrane targeting (P417L and W444R), pointing out crucial amino acids for hGLUT2 transport function. In contrast, engineered mutants were located at the plasma membrane and able to transport sugar, albeit with modified kinetic parameters. Notably, these mutations resulted in gain of function. G20S and L368P mutations increased insulin secretion in the absence of glucose. In addition, these mutants increased insulin-positive cell differentiation when expressed in cultured rat embryonic pancreas. F295Y mutation induced β cell differentiation even in the absence of glucose, suggesting that mutated GLUT2, as a sugar receptor, triggers a signaling pathway independently of glucose transport and metabolism. Our results describe the first gain of function mutations for hGLUT2, revealing the importance of its receptor versus transporter function in pancreatic β cell development and insulin secretion.
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Affiliation(s)
- Aurélien Michau
- From the INSERM UMRS872, Cordeliers Research Center, Université Pierre et Marie Curie, 75006 Paris, France
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18
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Noel R, Gupta N, Pons V, Goudet A, Garcia-Castillo MD, Michau A, Martinez J, Buisson DA, Johannes L, Gillet D, Barbier J, Cintrat JC. N-Methyldihydroquinazolinone Derivatives of Retro-2 with Enhanced Efficacy against Shiga Toxin. J Med Chem 2013; 56:3404-13. [DOI: 10.1021/jm4002346] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Romain Noel
- CEA, iBiTec-S/SCBM, CEA-Saclay, LabEx LERMIT, F-91191 Gif-sur-Yvette, France
| | - Neetu Gupta
- CEA, iBiTec-S/SIMOPRO, CEA-Saclay, LabEx LERMIT, F-91191 Gif-sur-Yvette, France
| | - Valérie Pons
- CEA, iBiTec-S/SCBM, CEA-Saclay, LabEx LERMIT, F-91191 Gif-sur-Yvette, France
| | - Amélie Goudet
- CEA, iBiTec-S/SIMOPRO, CEA-Saclay, LabEx LERMIT, F-91191 Gif-sur-Yvette, France
| | - Maria Daniela Garcia-Castillo
- UMR144 CNRS and Traffic, Signaling,
and Delivery Laboratory, Institut Curie, 26 Rue d’Ulm, 75248 Paris Cedex 05, France
| | - Aurélien Michau
- CEA, iBiTec-S/SIMOPRO, CEA-Saclay, LabEx LERMIT, F-91191 Gif-sur-Yvette, France
| | - Jennifer Martinez
- CEA, iBiTec-S/SIMOPRO, CEA-Saclay, LabEx LERMIT, F-91191 Gif-sur-Yvette, France
| | | | - Ludger Johannes
- UMR144 CNRS and Traffic, Signaling,
and Delivery Laboratory, Institut Curie, 26 Rue d’Ulm, 75248 Paris Cedex 05, France
| | - Daniel Gillet
- CEA, iBiTec-S/SIMOPRO, CEA-Saclay, LabEx LERMIT, F-91191 Gif-sur-Yvette, France
| | - Julien Barbier
- CEA, iBiTec-S/SIMOPRO, CEA-Saclay, LabEx LERMIT, F-91191 Gif-sur-Yvette, France
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Stolarczyk E, Guissard C, Michau A, Even PC, Grosfeld A, Serradas P, Lorsignol A, Pénicaud L, Brot-Laroche E, Leturque A, Le Gall M. Detection of extracellular glucose by GLUT2 contributes to hypothalamic control of food intake. Am J Physiol Endocrinol Metab 2010; 298:E1078-87. [PMID: 20179244 DOI: 10.1152/ajpendo.00737.2009] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The sugar transporter GLUT2, present in several tissues of the gut-brain axis, has been reported to be involved in the control of food intake. GLUT2 is a sugar transporter sustaining energy production in the cell, but it can also function as a receptor for extracellular glucose. A glucose-signaling pathway is indeed triggered, independently of glucose metabolism, through its large cytoplasmic loop domain. However, the contribution of the receptor function over the transporter function of GLUT2 in the control of food intake remains to be determined. Thus, we generated transgenic mice that express a GLUT2-loop domain, blocking the detection of glucose but leaving GLUT2-dependent glucose transport unaffected. Inhibiting GLUT2-mediated glucose detection augmented daily food intake by a mechanism that increased the meal size but not the number of meals. Peripheral hormones (ghrelin, insulin, leptin) were unaffected, leading to a focus on central aspects of feeding behavior. We found defects in c-Fos activation by glucose in the arcuate nucleus and changes in the amounts of TRH and orexin neuropeptide mRNA, which are relevant to poorly controlled meal size. Our data provide evidence that glucose detection by GLUT2 contributes to the control of food intake by the hypothalamus. The sugar transporter receptor, i.e., "transceptor" GLUT2, may constitute a drug target to treat eating disorders and associated metabolic diseases, particularly by modulating its receptor function without affecting vital sugar provision by its transporter function.
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Affiliation(s)
- Emilie Stolarczyk
- Unité Mixte de Recherche (UMR) S872, Centre de Recherche des Cordeliers, 15 rue de l'Ecole de médecine, Paris, F-75006 France
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20
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Ning N, Dolgonos G, Morscheidt W, Michau A, Hassouni K, Vach H, Maroulis G, Simos TE. Computational Methods for Fundamental Studies Of Plasma Processes. ACTA ACUST UNITED AC 2007. [DOI: 10.1063/1.2827007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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