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Your search keyword '"Cynthia Gillet"' showing total 4 results
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4 results on '"Cynthia Gillet"'

1. A simple and efficient process for the synthesis of 2D carbon nitrides and related materials

Author

Cora Moreira Da Silva, Maxime Vallet, Clément Semion, Thomas Blin, Romuald Saint-Martin, Jocelyne Leroy, Diana Dragoé, François Brisset, Cynthia Gillet, Régis Guillot, and Vincent Huc

Subjects
Medicine, Science
Abstract

Abstract We describe here a new process for the synthesis of very high quality 2D Covalent Organic Frameworks (COFs), such a C2N and CN carbon nitrides. This process relies on the use of a metallic surface as both a reagent and a support for the coupling of small halogenated building blocks. The conditions of the assembly reaction are chosen so as to leave the inorganic salts by-products on the surface, to further confine the assembly reaction on the surface and increase the quality of the 2D layers. We found that under these conditions, the process directly returns few layers material. The structure/quality of these materials is demonstrated by extensive cross-characterizations at different scales, combining optical microscopy, Scanning Electron Microscopy (SEM)/Transmission Electron Microscopy (TEM) and Energy Dispersive Spectroscopy (EDS). The availability of such very large, high-quality layers of these materials opens interesting perspectives, for example in photochemistry and electronics (intrinsic transport properties, high gap substrate for graphene, etc...).

Published
2023
Full Text
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2. Dp71 contribution to the molecular scaffold anchoring aquaporine‐4 channels in brain macroglial cells

Author

Cyrille Vaillend, Jean-Vianney Barnier, Alvaro Rendon, Charlotte Izabelle, Mehdi Belmaati Cherkaoui, Claire Boulogne, Ophélie Vacca, Martine Cohen-Salmon, Cynthia Gillet, Anne-Cécile Boulay, Institut des Neurosciences Paris-Saclay (NeuroPSI), Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Centre interdisciplinaire de recherche en biologie (CIRB), Labex MemoLife, École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Collège de France (CdF (institution))-Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Institut de Biologie Intégrative de la Cellule (I2BC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Microscopie Électronique (MET), Département Plateforme (PF I2BC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut de Biologie Intégrative de la Cellule (I2BC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut de la Vision, Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Institut National de la Santé et de la Recherche Médicale (INSERM), ANR-14-CE13-0037,DYSther,Dystrophines Dans Le Système Nerveux : De la Neurophysiologie à la Thérapie Moléculaire(2014), ANR-11-EQPX-0029,MORPHOSCOPE 2,Imagerie et reconstruction multiéchelles de la morphogenèse. (Plateforme d'innovation technologique et méthodologique pour l'imagerie in vivo et la reconstruction des dynamiques multiéchelles de la morphogenèse)(2011), ANR-10-INBS-0004,France-BioImaging,Développment d'une infrastructure française distribuée coordonnée(2010), ANR-10-LABX-0040,SPS,Saclay Plant Sciences(2010), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL), and Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)

Subjects
0301 basic medicine, Cerebellum, glymphatic system, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, Hippocampus, Blood–brain barrier, Dystrophin, Mice, 03 medical and health sciences, Cellular and Molecular Neuroscience, 0302 clinical medicine, Cortex (anatomy), medicine, Animals, Dystroglycans, Aquaporin 4, biology, Brain, Immunogold labelling, blood-brain barrier, Cell biology, 030104 developmental biology, medicine.anatomical_structure, Neurology, Hippocampal Fissure, Astrocytes, intellectual disability, biology.protein, Glymphatic system, gliovascular unit, Neuroglia, 030217 neurology & neurosurgery
Abstract

International audience; Intellectual disability in Duchenne muscular dystrophy has been associated with the loss of dystrophin-protein 71, Dp71, the main dystrophin-gene product in the adult brain. Dp71 shows major expression in perivascular macroglial endfeet, suggesting that dysfunctional glial mechanisms contribute to cognitive impairments. In the present study, we investigated the molecular alterations induced by a selective loss of Dp71 in mice, using semi-quantitative immunogold analyses in electron microscopy and immunofluorescence confocal analyses in brain sections and purified gliovascular units. In macroglial pericapillary endfeet of the cerebellum and hippocampus, we found a drastic reduction (70%) of the polarized distribution of aquaporin-4 (AQP4) channels, a 50% reduction of β-dystroglycan, and a complete loss of α1-syntrophin. Interestingly, in the hippocampus and cortex, these effects were not homogeneous: AQP4 and AQP4ex isoforms were mostly lost around capillaries but preserved in large vessels corresponding to pial arteries, penetrating cortical arterioles, and arterioles of the hippocampal fissure, indicating the presence of Dp71-independent pools of AQP4 in these vascular structures. In conclusion, the depletion of Dp71 strongly alters the distribution of AQP4 selectively in macroglial perivascular endfeet surrounding capillaries. This effect likely affects water homeostasis and blood-brain barrier functions and may thus contribute to the synaptic and cognitive defects associated with Dp71 deficiency.

Published
2020

3. NEM6, KBTBD13-Related Congenital Myopathy: Myopathological Analysis in 18 Dutch Patients Reveals Ring Rods Fibers, Cores, Nuclear Clumps, and Granulo-Filamentous Protein Material

Author

Nicol C. Voermans, Claire Boulogne, Benno Küsters, Clémence Labasse, Baziel G.M. van Engelen, Coen A.C. Ottenheijm, Josine M. de Winter, Guy Brochier, Karlijn Bouman, Lilian Eshuis, Esmee S.B. Van Kleef, Norma B. Romero, A. Madelaine, Cynthia Gillet, Edoardo Malfatti, Physiology, and ACS - Pulmonary hypertension & thrombosis

Subjects
Adult, Male, Pathology, medicine.medical_specialty, genetic structures, Muscle Fibers, Skeletal, Muscle Proteins, Myopathies, Nemaline, Sarcomere, Pathology and Forensic Medicine, law.invention, 03 medical and health sciences, Cellular and Molecular Neuroscience, 0302 clinical medicine, Nemaline myopathy, law, medicine, Myotilin, Humans, Myopathy, Actin, 030304 developmental biology, Aged, Netherlands, 0303 health sciences, biology, Chemistry, General Medicine, Middle Aged, medicine.disease, Disorders of movement Donders Center for Medical Neuroscience [Radboudumc 3], Congenital myopathy, Neurology, biology.protein, Titin, Female, Neurology (clinical), sense organs, medicine.symptom, Electron microscope, 030217 neurology & neurosurgery
Abstract

Contains fulltext : 232919.pdf (Publisher’s version ) (Closed access) Nemaline myopathy type 6 (NEM6), KBTBD13-related congenital myopathy is caused by mutated KBTBD13 protein that interacts improperly with thin filaments/actin, provoking impaired muscle-relaxation kinetics. We describe muscle morphology in 18 Dutch NEM6 patients and correlate it with clinical phenotype and pathophysiological mechanisms. Rods were found in in 85% of biopsies by light microscopy, and 89% by electron microscopy. A peculiar ring disposition of rods resulting in ring-rods fiber was observed. Cores were found in 79% of NEM6 biopsies by light microscopy, and 83% by electron microscopy. Electron microscopy also disclosed granulofilamentous protein material in 9 biopsies. Fiber type 1 predominance and prominent nuclear internalization were found. Rods were immunoreactive for α-actinin and myotilin. Areas surrounding the rods showed titin overexpression suggesting derangement of the surrounding sarcomeres. NEM6 myopathology hallmarks are prominent cores, rods including ring-rods fibers, nuclear clumps, and granulofilamentous protein material. This material might represent the histopathologic epiphenomenon of altered interaction between mutated KBTBD13 protein and thin filaments. We claim to classify KBTBD13-related congenital myopathy as rod-core myopathy.

Published
2021

4. ABMA, a small molecule that inhibits intracellular toxins and pathogens by interfering with late endosomal compartments

Author

Didier Sauvaire, Philippe M. Loiseau, Sabrina Kali, Rahima Yousfi, Pascal Clayette, Daniel Gillet, Céline Bouclier, Noël Tordo, Jérôme Laporte, Amélie Goudet, Goulven Merer, Roman Lopez, Michel R. Popoff, Sandrine Cojean, Valérie Pons, Céline Aubenque, Claire Boulogne, Emmanuel Lemichez, Annette Fischer, Jean-Christophe Cintrat, Laetitia Panigai, Yu Wu, Cynthia Gillet, Roger Le Grand, Thomas Rudel, Robert A. Davey, Julien Barbier, Jo-Ana Herweg, Emilie Gobbo, Service d'Ingénierie Moléculaire pour la Santé (ex SIMOPRO) (SIMoS), Médicaments et Technologies pour la Santé (MTS), Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Service de Chimie Bio-Organique et de Marquage (SCBM), Agence nationale de sécurité du médicament et des produits de santé [Saint-Denis] (ANSM), Julius-Maximilians-Universität Würzburg [Wurtzbourg, Allemagne] (JMU), Stratégies antivirales, Institut Pasteur [Paris], Texas Biomedical Research Institute, CEA [Fontenay-aux-Roses] (UGRA / SETA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Biologie Intégrative de la Cellule (I2BC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Molécules bioactives, conception, isolement et synthèse (MBCIS), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Bactéries anaérobies et Toxines, Pharmacologie des rétrovirus, Immunologie des Maladies Virales et Autoimmunes (IMVA - U1184), Université Paris-Sud - Paris 11 (UP11)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Centre méditerranéen de médecine moléculaire (C3M), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Institut National de la Santé et de la Recherche Médicale (INSERM), This work has been funded by the joint ministerial program of R&D against CBRNE risks and CEA, and benefited from the core facilities of Imagerie-Gif (http://www.i2bc.paris-saclay.fr), member of IBiSA (http://www.ibisa.net), supported by 'France-BioImaging' (ANR-10-INBS-04–01) and the Labex 'Saclay Plant Science' (ANR-11-IDEX-0003–02). This work was also supported by U.S. National Institutes of Health and National Institute of Allergy and Infectious Diseases grant R01AI063513, Defense Threat Reduction Agency grant HDTRA1–12–1–0002, and the Douglass and Ewing Halsell Foundations. Work on Simkania and Chlamydia was supported by the Deutsche Forschungsgemeinschaft (DFG) Priority programme 1580 to T.R. SIMOPRO and SCBM are members of the Laboratory of Excellence LERMIT supported by a grant from the Agence Nationale de la Recherche (ANR-10-LABX-33) and RetroLeishma project R3, We greatfully thank Anne Doye (Université de Nice Sophia-Antipolis) for technical assistance and Bruno Beaumelle for providing ricin, ANR-11-IDEX-0002,UNITI,Université Fédérale de Toulouse(2011), ANR-10-INBS-0004,France-BioImaging,Développment d'une infrastructure française distribuée coordonnée(2010), ANR-11-IDEX-0003,IPS,Idex Paris-Saclay(2011), Julius-Maximilians-Universität Würzburg (JMU), Institut Pasteur [Paris] (IP), Université Paris-Sud - Paris 11 (UP11)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de la Santé et de la Recherche Médicale (INSERM), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Côte d'Azur (UCA), Popoff, Michel, Initiative d'excellence - Université Fédérale de Toulouse - - UNITI2011 - ANR-11-IDEX-0002 - IDEX - VALID, Développment d'une infrastructure française distribuée coordonnée - - France-BioImaging2010 - ANR-10-INBS-0004 - INBS - VALID, and Idex Paris-Saclay - - IPS2011 - ANR-11-IDEX-0003 - IDEX - VALID

Subjects
0301 basic medicine, Benzylamines, Endosome, 030106 microbiology, Cell, Golgi Apparatus, lcsh:Medicine, Adamantane, Endosomes, Ricin, Endoplasmic Reticulum, Article, Mice, 03 medical and health sciences, symbols.namesake, ddc:570, Benzyl Compounds, Organelle, medicine, Animals, Humans, lcsh:Science, Pathogen, Toxins, Biological, Multidisciplinary, Chemistry, Antimicrobials, Endoplasmic reticulum, Intracellular parasite, lcsh:R, High-throughput screening, Golgi apparatus, [SDV.MP.BAC]Life Sciences [q-bio]/Microbiology and Parasitology/Bacteriology, Cell Compartmentation, 3. Good health, Cell biology, 030104 developmental biology, medicine.anatomical_structure, symbols, Infectious diseases, lcsh:Q, [SDV.MP.BAC] Life Sciences [q-bio]/Microbiology and Parasitology/Bacteriology, Lysosomes, Intracellular, HeLa Cells
Abstract

Intracellular pathogenic microorganisms and toxins exploit host cell mechanisms to enter, exert their deleterious effects as well as hijack host nutrition for their development. A potential approach to treat multiple pathogen infections and that should not induce drug resistance is the use of small molecules that target host components. We identified the compound 1-adamantyl (5-bromo-2-methoxybenzyl) amine (ABMA) from a cell-based high throughput screening for its capacity to protect human cells and mice against ricin toxin without toxicity. This compound efficiently protects cells against various toxins and pathogens including viruses, intracellular bacteria and parasite. ABMA provokes Rab7-positive late endosomal compartment accumulation in mammalian cells without affecting other organelles (early endosomes, lysosomes, the Golgi apparatus, the endoplasmic reticulum or the nucleus). As the mechanism of action of ABMA is restricted to host-endosomal compartments, it reduces cell infection by pathogens that depend on this pathway to invade cells. ABMA may represent a novel class of broad-spectrum compounds with therapeutic potential against diverse severe infectious diseases.

Published
2017

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