30 results on '"Moreau, Bertrand"'
Search Results
2. The EMSO Generic Instrument Module (EGIM): Standardized and Interoperable Instrumentation for Ocean Observation
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Lantéri, Nadine, Ruhl, Henry A., Gates, Andrew R., Martínez, Enoc, Río, Joaquín del, Aguzzi, Jacopo, Cannat, Mathilde, Delory, Eric, Embriaco, Davide, Huber, Robert, Matabos, Marjolaine, Petihakis, George, Reilly, Kieran, Rolin, Jean-François, Van der Schaar, Mike, André, Michel, Blandin, Jérôme, Cianca, Andrés, Francescangeli, Marco, Garcia, O., Hartman, Susan E., Lagadec, Jean-Romain, Legrand, Julien, Pagonis, Paris, Piera, Jaume, Remirez, Xabier, Toma, Daniel M., Marinaro, Giuditta, Moreau, Bertrand, Santana, Raul, Wright, Hannah, Dañobeitia, Juan José, Favali, Paolo, Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), European Commission, and Natural Environment Research Council (UK)
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Fixed-point observatories ,Water column ,seafloor ,EOV ,Multi-parametric monitoring ,Seafloor ,fixed-point observatories ,water column ,EGIM ,multi-parametric monitoring ,EMSO - Abstract
17 pages, 10 figures, 2 tables.-- Data Availability Statement: The datasets presented in this study can be found in online repositories. The names of the repository/repositories and accession number(s) can be found below: Data from the EGIM, EMSO-Canarias (ESTOC), 2020. SEANOE. https://doi.org/10.17882/83639, https://doi.org/10.17882/83643, https://doi.org/10.17882/83646, https://doi.org/10.17882/83642, and https://doi.org/10.17882/83645. Data from the EGIM, EMSO-Azores observatory, 2017-2018. SEANOE. https://doi.org/10.17882/56665, https://doi.org/10.17882/56528, https://doi.org/10.17882/56501, https://doi.org/10.17882/56525, https://doi.org/10.17882/56626, https://doi.org/10.17882/57005, https://doi.org/10.17882/69867, and https://doi.org/10.17882/69976. Annotated images capturing fish abundances during the first deployment of the EMSO Generic Instrument Module (EGIM) at the OBSEA cabled observatory from December 2016 to April 2017. PANGAEA, https://doi.org/10.1594/PANGAEA.936693. Data collected during the first deployment of the EMSO Generic Instrument Module (EGIM) at the OBSEA cabled observatory from December, 2016 to April, 2017. PANGAEA, https://doi.org/10.1594/PANGAEA.883072, The oceans are a fundamental source for climate balance, sustainability of resources and life on Earth, therefore society has a strong and pressing interest in maintaining and, where possible, restoring the health of the marine ecosystems. Effective, integrated ocean observation is key to suggesting actions to reduce anthropogenic impact from coastal to deep-sea environments and address the main challenges of the 21st century, which are summarized in the UN Sustainable Development Goals and Blue Growth strategies. The European Multidisciplinary Seafloor and water column Observatory (EMSO), is a European Research Infrastructure Consortium (ERIC), with the aim of providing long-term observations via fixed-point ocean observatories in key environmental locations across European seas from the Arctic to the Black Sea. These may be supported by ship-based observations and autonomous systems such as gliders. In this paper, we present the EMSO Generic Instrument Module (EGIM), a deployment ready multi-sensor instrumentation module, designed to measure physical, biogeochemical, biological and ecosystem variables consistently, in a range of marine environments, over long periods of time. Here, we describe the system, features, configuration, operation and data management. We demonstrate, through a series of coastal and oceanic pilot experiments that the EGIM is a valuable standard ocean observation module, which can significantly improve the capacity of existing ocean observatories and provides the basis for new observatories. The diverse examples of use included the monitoring of fish activity response upon oceanographic variability, hydrothermal vent fluids and particle dispersion, passive acoustic monitoring of marine mammals and time series of environmental variation in the water column. With the EGIM available to all the EMSO Regional Facilities, EMSO will be reaching a milestone in standardization and interoperability, marking a key capability advancement in addressing issues of sustainability in resource and habitat management of the oceans, This work was funded by the project EMSODEV (Grant agreement No 676555) supported by DG Research and Innovation of the European Commission under the Research Infrastructures Programme of the H2020. EMSO-link EC project (Grant agreement No 731036) provided additional funding. Other projects which supported the work include Plan Estatal de Investigación Científica y Técnica y de Innovación 2017–2020, project BITER-LANDER PID2020-114732RB-C32, iFADO (Innovation in the Framework of the Atlantic Deep Ocean, 2017–2021) EAPA_165/2016. The Spanish Government contributed through the “Severo Ochoa Centre Excellence” accreditation to ICM-CSIC (CEX2019-000928-S) and the Research Unit Tecnoterra (ICM-CSIC/UPC). UK colleagues were supported by Climate Linked Atlantic Sector Science (CLASS) project supported by NERC National Capability funding (NE/R015953/1)
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- 2022
3. The Rice Monovalent Cation Transporter OsHKT2;4: Revisited Ionic Selectivity
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Sassi, Ali, Mieulet, Delphine, Khan, Imran, Moreau, Bertrand, Gaillard, Isabelle, Sentenac, Hervé, and Véry, Anne-Aliénor
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- 2012
4. The EMSO Generic Instrument Module (EGIM): Standardized and Interoperable Instrumentation for Ocean Observation
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Lantéri, Nadine, primary, Ruhl, Henry A., additional, Gates, Andrew, additional, Martínez, Enoc, additional, del Rio Fernandez, Joaquin, additional, Aguzzi, Jacopo, additional, Cannat, Mathilde, additional, Delory, Eric, additional, Embriaco, Davide, additional, Huber, Robert, additional, Matabos, Marjolaine, additional, Petihakis, George, additional, Reilly, Kieran, additional, Rolin, Jean-François, additional, van der Schaar, Mike, additional, André, Michel, additional, Blandin, Jérôme, additional, Cianca, Andrés, additional, Francescangeli, Marco, additional, Garcia, Oscar, additional, Hartman, Susan, additional, Lagadec, Jean-Romain, additional, Legrand, Julien, additional, Pagonis, Paris, additional, Piera, Jaume, additional, Remirez, Xabier, additional, Toma, Daniel M., additional, Marinaro, Giuditta, additional, Moreau, Bertrand, additional, Santana, Raul, additional, Wright, Hannah, additional, Dañobeitia, Juan José, additional, and Favali, Paolo, additional
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- 2022
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5. Preparing the New Phase of Argo: Technological Developments on Profiling Floats in the NAOS Project
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André, Xavier, primary, Le Traon, Pierre-Yves, additional, Le Reste, Serge, additional, Dutreuil, Vincent, additional, Leymarie, Edouard, additional, Malardé, Damien, additional, Marec, Claudie, additional, Sagot, Jérôme, additional, Amice, Martin, additional, Babin, Marcel, additional, Claustre, Hervé, additional, David, Arnaud, additional, D’Ortenzio, Fabrizio, additional, Kolodziejczyk, Nicolas, additional, Lagunas, José Luis, additional, Le Menn, Marc, additional, Moreau, Bertrand, additional, Nogré, David, additional, Penkerc’h, Christophe, additional, Poteau, Antoine, additional, Renaut, Corentin, additional, Schaeffer, Christophe, additional, Taillandier, Vincent, additional, and Thierry, Virginie, additional
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- 2020
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6. The EGIM, EMSO generic instrument module, step towards standardization
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Lanteri, Nadine, Legrand, Julien, Ruhl, H.A., Blandin, Jérôme, Cannat, Mathilde, Río Fernandez, Joaquín del, Gates, Andrew, Lagadec, Jean-Romain, Moreau, Bertrand, Pagonis, Paris, Sarradin, Pierre Marie, Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica, and Universitat Politècnica de Catalunya. SARTI-MAR - Sistemes d'Adquisició Remota de dades i Tractament de la Informació en el Medi Marí
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Ocean bottom -- Research ,education ,Enginyeria electrònica::Instrumentació i mesura [Àrees temàtiques de la UPC] ,Fons marins -- Investigació - Published
- 2019
7. A Cystic Fibrosis Tracheal Gland Cell Line, CF-KM4: Correction by Adenovirus-Mediated CFTR Gene Transfer
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Kammouni, Wafa, Moreau, Bertrand, Becq, Frederic, Saleh, Ali, Pavirani, Andrea, Figarella, Catherine, and Merten, Marc D.
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- 1999
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8. COSTOF2, a smart solution for multisensor marine observations
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Legrand, Julien, primary, Gautier, Laurent, additional, Moreau, Bertrand, additional, Blandin, Jerome, additional, Coail, Jean Yves, additional, Le Vourc'h, Damien, additional, Le Piver, David, additional, and Lagadec, Jean-Romain, additional
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- 2019
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9. The EGIM, a generic instrumental module to equip EMSO observatories
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Lanteri, Nadine, primary, Legrand, Julien, additional, Moreau, Bertrand, additional, Lagadec, Jean Romain, additional, and Rolin, Jean Francois, additional
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- 2017
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10. Toward Community Standards and Software for Whole-Cell Modeling
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Waltemath, Dagmar, primary, Karr, Jonathan R., additional, Bergmann, Frank T., additional, Chelliah, Vijayalakshmi, additional, Hucka, Michael, additional, Krantz, Marcus, additional, Liebermeister, Wolfram, additional, Mendes, Pedro, additional, Myers, Chris J., additional, Pir, Pinar, additional, Alaybeyoglu, Begum, additional, Aranganathan, Naveen K, additional, Baghalian, Kambiz, additional, Bittig, Arne T., additional, Burke, Paulo E. Pinto, additional, Cantarelli, Matteo, additional, Chew, Yin Hoon, additional, Costa, Rafael S., additional, Cursons, Joseph, additional, Czauderna, Tobias, additional, Goldberg, Arthur P., additional, Gomez, Harold F., additional, Hahn, Jens, additional, Hameri, Tuure, additional, Gardiol, Daniel F. Hernandez, additional, Kazakiewicz, Denis, additional, Kiselev, Ilya, additional, Knight-Schrijver, Vincent, additional, Knupfer, Christian, additional, Konig, Matthias, additional, Lee, Daewon, additional, Lloret-Villas, Audald, additional, Mandrik, Nikita, additional, Medley, J. Kyle, additional, Moreau, Bertrand, additional, Naderi-Meshkin, Hojjat, additional, Palaniappan, Sucheendra K., additional, Priego-Espinosa, Daniel, additional, Scharm, Martin, additional, Sharma, Mahesh, additional, Smallbone, Kieran, additional, Stanford, Natalie J., additional, Song, Je-Hoon, additional, Theile, Tom, additional, Tokic, Milenko, additional, Tomar, Namrata, additional, Toure, Vasundra, additional, Uhlendorf, Jannis, additional, Varusai, Thawfeek M, additional, Watanabe, Leandro H., additional, Wendland, Florian, additional, Wolfien, Markus, additional, Yurkovich, James T., additional, Zhu, Yan, additional, Zardilis, Argyris, additional, Zhukova, Anna, additional, and Schreiber, Falk, additional
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- 2016
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11. Satellite Communication System: Implementation on the Arvor Oceanographic Profiling Floats
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André, Xavier, Moreau, Bertrand, and Le Reste, Serge
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Time budget ,Atmospheric Science ,Meteorology ,Communications satellite ,Profiling (information science) ,Environmental science ,Ocean Engineering ,14. Life underwater ,Transmission system ,Implementation ,Argo ,Remote sensing - Abstract
The scientific community observes the ocean for applications in the fields of oceanography and climate research. To recover in situ data, more than 3000 profiling floats are operated in the framework of the Argo program. Each float performs cycles between the sea surface and a depth of 2000 m. Scientific data are gathered while the float is traveling upward from the depths of the oceans and are then transmitted via a satellite communication system at the end of each cycle. During its time at the surface, mainly dedicated to transmissions, the float is vulnerable and subject to drift, which limits its use in many studies. Moreover, transmission times are becoming longer due to a trend toward high-resolution or multisensor profiles. Consequently, the transmission system embedded in the profiling floats had to evolve.Argos-3 is the latest generation of the Argos satellite communication system. It has been designed to allow instruments to transmit more data in a small time budget and as an alternative to Iridium, already implemented on profiling floats in restrictive applications.This study aims to evaluate the implementation of Argos-3 on Arvor profiling floats. Tests were carried out first in the laboratory, before being implemented on the Arvor float and deployed at sea. This study proves that the high-data-rate mode suffered from European electromagnetic noise, which is incompatible with this application. The interactive low-data-rate mode was successfully qualified; it is capable of transmitting an entire dataset in a few minutes, compared to 8–10 h for the previous Argos-2 system.
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- 2015
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12. Characterization of the grapevine Shaker K+ channel VvK3.1 supports its function in massive potassium fluxes necessary for berry potassium loading and pulvinus‐actuated leaf movements.
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Nieves‐Cordones, Manuel, Andrianteranagna, Mamy, Cuéllar, Teresa, Chérel, Isabelle, Gibrat, Rémy, Boeglin, Martin, Moreau, Bertrand, Paris, Nadine, Verdeil, Jean‐Luc, Zimmermann, SabineDagmar, and Gaillard, Isabelle
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GRAPES ,PHLOEM ,PLANT cells & tissues ,CLIMATE change ,IN situ hybridization - Abstract
Summary: In grapevine, climate changes lead to increased berry potassium (K+) contents that result in must with low acidity. Consequently, wines are becoming 'flat' to the taste, with poor organoleptic properties and low potential aging, resulting in significant economic loss. Precise investigation into the molecular determinants controlling berry K+ accumulation during its development are only now emerging.Here, we report functional characterization by electrophysiology of a new grapevine Shaker‐type K+ channel, VvK3.1. The analysis of VvK3.1 expression patterns was performed by qPCR and in situ hybridization.We found that VvK3.1 belongs to the AKT2 channel phylogenetic branch and is a weakly rectifying channel, mediating both inward and outward K+ currents. We showed that VvK3.1 is highly expressed in the phloem and in a unique structure located at the two ends of the petiole, identified as a pulvinus.From the onset of fruit ripening, all data support the role of the VvK3.1 channel in the massive K+ fluxes from the phloem cell cytosol to the berry apoplast during berry K+ loading. Moreover, the high amount of VvK3.1 transcripts detected in the pulvinus strongly suggests a role for this Shaker in the swelling and shrinking of motor cells involved in paraheliotropic leaf movements. [ABSTRACT FROM AUTHOR]
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- 2019
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13. The Arabidopsis AtPP2CA Protein Phosphatase Inhibits the GORK K+ Efflux Channel and Exerts a Dominant Suppressive Effect on Phosphomimetic-activating Mutations
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Lefoulon, Cécile, primary, Boeglin, Martin, additional, Moreau, Bertrand, additional, Véry, Anne-Aliénor, additional, Szponarski, Wojciech, additional, Dauzat, Myriam, additional, Michard, Erwan, additional, Gaillard, Isabelle, additional, and Chérel, Isabelle, additional
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- 2016
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14. Argos-3 Satellite Communication System: Implementation on the Arvor Oceanographic Profiling Floats
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André, Xavier, primary, Moreau, Bertrand, additional, and Le Reste, Serge, additional
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- 2015
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15. IFREMER - Flotteur ARVOR : la génération ARGOS-3
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Le Reste, Serge, Andre, Xavier, and Moreau, Bertrand
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Hardware_ARITHMETICANDLOGICSTRUCTURES - Abstract
The Technological Research and Development Department of the French Research Institute for Exploitation of the Sea (IFREMER) is currently working on the integration of ARGOS PMTs into their ARVOR float. They plan to deploy these new, improved floats by the end of the 2010., Le département Recherche et Développement Technologique de l'Ifremer travaille sur l'intégration des émetteurs Argos-3 dans le flotteur Arvor. Des nouveaux flotteurs optiimisés dont le premier déploiement est prévu en 2010.
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- 2010
16. Molecular basis for modulation of voltage-gating of plant Shaker channels. Identification of Ca2+-dependant kinasestargeting some Arabidopsis Shaker channels
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Pascaud, François, Held, Katrin, Moreau, Bertrand, Cherel, Isabelle, Lacombe, Benoit, Kudla, Jörg, Thibaud, Jean-Baptiste, Biochimie et Physiologie Moléculaire des Plantes (BPMP), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Institut für Biologie und Biotechnologie der Pflanzen, Westfälische Wilhelms-Universität Münster (WWU), and Chérel, Isabelle
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[SDV] Life Sciences [q-bio] ,[SDV]Life Sciences [q-bio] ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
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- 2008
17. Arabidopsis shaker channel posttranslational regulation: search for proteins interacting with shaker alpha subunits
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Pascaud, François, Cherel, Isabelle, Lacombe, Benoit, Moreau, Bertrand, Thibaud, Jean-Baptiste, Biochimie et Physiologie Moléculaire des Plantes (BPMP), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), and Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)
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[SDV]Life Sciences [q-bio] ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
- Published
- 2007
18. Activation of VPAC1 receptors by VIP and PACAP-27 in human bronchial epithelial cells induces CFTR-dependent chloride secretion
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Dérand, Renaud, Montoni, Alicia, Bulteau-Pignoux, Laurence, Janet, Thierry, Moreau, Bertrand, Muller, Jean-Marc, and Becq, Frédéric
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Receptors, Vasoactive Intestinal Polypeptide, Type I ,Reverse Transcriptase Polymerase Chain Reaction ,Colforsin ,Neuropeptides ,Receptors, Pituitary Adenylate Cyclase-Activating Polypeptide ,Cystic Fibrosis Transmembrane Conductance Regulator ,Bronchi ,Epithelial Cells ,Iodides ,Cell Line ,Chlorides ,Papers ,Glyburide ,Humans ,Hypoglycemic Agents ,Pituitary Adenylate Cyclase-Activating Polypeptide ,Receptors, Vasoactive Intestinal Peptide ,RNA, Messenger ,Receptors, Pituitary Hormone ,hormones, hormone substitutes, and hormone antagonists ,Vasoactive Intestinal Peptide - Abstract
1. In the human airway epithelium, VIP/PACAP receptors are distributed in nerve fibers and in epithelial cells but their role in transepithelial ion transport have not been reported. Here, we show that human bronchial epithelial Calu-3 cells expressed the VPAC(1) receptor subtype which shares similar high affinity for VIP and PACAP-27. 2. The stoichiometric binding parameters characterizing the (125)I-VIP and (125)I-PACAP-27 binding to these receptors were determined. 3. We found that VIP (EC(50) approximately 7.6 nM) and PACAP-27 (EC(50) approximately 10 nM) stimulated glibenclamide-sensitive and DIDS-insensitive iodide efflux in Calu-3 cells. 4. The protein kinase A (PKA) inhibitor, H-89 and the protein kinase C (PKC) inhibitor, chelerythrine chloride prevented activation by both peptides demonstrating that PKA and PKC are part of the signaling pathway. This profile corresponds to the pharmacological signature of CFTR. 5. In the cystic fibrosis airway epithelial IB3-1 cell lacking functional CFTR but expressing VPAC(1) receptors, neither VIP, PACAP-27 nor forskolin stimulated chloride transport. 6. Ussing chamber experiments demonstrated stimulation of CFTR-dependent short-circuit currents by VIP or PACAP-27 applied to the basolateral but not to the apical side of Calu-3 cells monolayers. 7. This study shows the stimulation in human bronchial epithelial cells of CFTR-dependent chloride secretion following activation by VIP and PACAP-27 of basolateral VPAC(1) receptors.
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- 2004
19. Mécanisme moléculaire d’action de l’acide abscissique en réponse à la sécheresse chez les végétaux
- Author
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Leung, Jeffrey, primary, Valon, Christiane, additional, Moreau, Bertrand, additional, Boeglin, Martin, additional, Lefoulon, Cécile, additional, Joshi-Saha, Archana, additional, and Chérel, Isabelle, additional
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- 2012
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20. Exact Geometrical Predicate: Point in circle
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Moreau, Bertrand, primary and Gouaillard, Alexandre, additional
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- 2011
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21. Activation of VPAC1receptors by VIP and PACAP-27 in human bronchial epithelial cells induces CFTR-dependent chloride secretion
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Dérand, Renaud, primary, Montoni, Alicia, additional, Bulteau-Pignoux, Laurence, additional, Janet, Thierry, additional, Moreau, Bertrand, additional, Muller, Jean-Marc, additional, and Becq, Frédéric, additional
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- 2004
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22. Activation of VPAC1 receptors by VIP and PACAP-27 in human bronchial epithelial cells induces CFTR-dependent chloride secretion.
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Dérand, Renaud, Montoni, Alicia, Bulteau-Pignoux, Laurence, Janet, Thierry, Moreau, Bertrand, Muller, Jean-Marc, and Becq, Frédéric
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CYSTIC fibrosis ,GENETIC disorders ,CHLORIDE channels ,VASOACTIVE intestinal peptide ,GASTROINTESTINAL hormones ,NEUROTRANSMITTERS ,PEPTIDES - Abstract
1: In the human airway epithelium, VIP/PACAP receptors are distributed in nerve fibers and in epithelial cells but their role in transepithelial ion transport have not been reported. Here, we show that human bronchial epithelial Calu-3 cells expressed the VPAC
1 receptor subtype which shares similar high affinity for VIP and PACAP-27. 2: The stoichiometric binding parameters characterizing the125 I-VIP and125 I-PACAP-27 binding to these receptors were determined. 3: We found that VIP (EC50 ˜7.6?nM) and PACAP-27 (EC50 ˜10?nM) stimulated glibenclamide-sensitive and DIDS-insensitive iodide efflux in Calu-3 cells. 4: The protein kinase A (PKA) inhibitor, H-89 and the protein kinase C (PKC) inhibitor, chelerythrine chloride prevented activation by both peptides demonstrating that PKA and PKC are part of the signaling pathway. This profile corresponds to the pharmacological signature of CFTR. 5: In the cystic fibrosis airway epithelial IB3-1 cell lacking functional CFTR but expressing VPAC1 receptors, neither VIP, PACAP-27 nor forskolin stimulated chloride transport. 6: Ussing chamber experiments demonstrated stimulation of CFTR-dependent short-circuit currents by VIP or PACAP-27 applied to the basolateral but not to the apical side of Calu-3 cells monolayers. 7: This study shows the stimulation in human bronchial epithelial cells of CFTR-dependent chloride secretion following activation by VIP and PACAP-27 of basolateral VPAC1 receptors.British Journal of Pharmacology (2004) 141, 698-708. doi:10.1038/sj.bjp.0705597 [ABSTRACT FROM AUTHOR]- Published
- 2004
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23. Arbitration in International Trade
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Domke, Martin, primary, O'Keefe, Patrick J., additional, Robert, Jean, additional, Moreau, Bertrand, additional, Foustoucos, Anghelos C., additional, and Cremades, Bernard Maria, additional
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- 1978
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24. The Arabidopsis AtPP2CA Protein Phosphatase Inhibits the GORK K+ Efflux Channel and Exerts a Dominant Suppressive Effect on Phosphomimetic-activating Mutations.
- Author
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Lefoulon, Cécile, Boeglin, Martin, Moreau, Bertrand, Véry, Anne-Aliénor, Szponarski, Wojciech, Dauzat, Myriam, Michard, Erwan, Gaillard, Isabelle, and Chérel, Isabelle
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- *
ARABIDOPSIS proteins , *PROTEIN phosphatase inhibitors , *GENETIC mutation , *SUBSTITUTION reactions , *PHENOTYPES - Abstract
The regulation of the GORK (Guard Cell Outward Rectifying) Shaker channel mediating a massive K+ efflux in Arabidopsis guard cells by the phosphatase AtPP2CA was investigated. Unlike the gork mutant, the atpp2ca mutants displayed a phenotype of reduced transpiration. We found that AtPP2CA interacts physically with GORK and inhibits GORK activity in Xenopus oocytes. Several amino acid substitutions in the AtPP2CA active site, including the dominant interfering G145D mutation, disrupted the GORK-AtPP2CA interaction, meaning that the native conformation of the AtPP2CA active site is required for theGORKAtPP2CA interaction. Furthermore, two serines in the GORK ankyrin domain that mimic phosphorylation (Ser to Glu) or dephosphorylation (Ser to Ala) were mutated. Mutations mimicking phosphorylation led to a significant increase in GORK activity, whereas mutations mimicking dephosphorylation had no effect on GORK. In Xenopus oocytes, the interaction of AtPP2CA with "phosphorylated" or "dephosphorylated"GORK systematically led to inhibition of the channel to the same baseline level. Single-channel recordings indicated that the GORK S722E mutation increases the open probability of the channel in the absence, but not in the presence, of AtPP2CA. The dephosphorylation- independent inactivation mechanism of GORK by AtPP2CA is discussed in relation with well known conformational changes in animal Shaker-like channels that lead to channel opening and closing. In plants, PP2C activity would control the stomatal aperture by regulating both GORK and SLAC1, the two main channels required for stomatal closure. [ABSTRACT FROM AUTHOR]
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- 2016
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25. Frais d'arbitrage
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Jandard, Léonor, Centre de droit international de Nanterre (CEDIN), Université Paris Nanterre (UPN), Moreau, Bertrand and Augendre, Geneviève, HAL Nanterre, Administrateur, and Moreau, Bertrand and Augendre, Geneviève
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[SHS.DROIT]Humanities and Social Sciences/Law ,[SHS.DROIT] Humanities and Social Sciences/Law ,[No keyword] ,ComputingMilieux_MISCELLANEOUS - Abstract
National audience; [No abstract]
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- 2016
26. Typologie des centres d'arbitrage
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Jandard, Léonor, Centre de droit international de Nanterre (CEDIN), Université Paris Nanterre (UPN), Moreau, Bertrand and Augendre, Geneviève, HAL Nanterre, Administrateur, and Moreau, Bertrand and Augendre, Geneviève
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[SHS.DROIT]Humanities and Social Sciences/Law ,[SHS.DROIT] Humanities and Social Sciences/Law ,[No keyword] ,ComputingMilieux_MISCELLANEOUS - Abstract
National audience; [No abstract]
- Published
- 2016
27. Comité d'arbitrage
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Jandard, Léonor, Centre de droit international de Nanterre (CEDIN), Université Paris Nanterre (UPN), Moreau, Bertrand and Augendre, Geneviève, HAL Nanterre, Administrateur, and Moreau, Bertrand and Augendre, Geneviève
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[SHS.DROIT]Humanities and Social Sciences/Law ,[SHS.DROIT] Humanities and Social Sciences/Law ,[No keyword] ,ComputingMilieux_MISCELLANEOUS - Abstract
National audience; [No abstract]
- Published
- 2016
28. Characterization of the grapevine Shaker K + channel VvK3.1 supports its function in massive potassium fluxes necessary for berry potassium loading and pulvinus-actuated leaf movements.
- Author
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Nieves-Cordones M, Andrianteranagna M, Cuéllar T, Chérel I, Gibrat R, Boeglin M, Moreau B, Paris N, Verdeil JL, Zimmermann S, and Gaillard I
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- Animals, Droughts, Flowers genetics, Flowers metabolism, Gene Expression Regulation, Plant, Hydrogen-Ion Concentration, Oocytes metabolism, RNA, Messenger genetics, RNA, Messenger metabolism, Stress, Physiological, Xenopus metabolism, Fruit metabolism, Plant Proteins metabolism, Potassium metabolism, Potassium Channels metabolism, Pulvinus metabolism, Vitis metabolism
- Abstract
In grapevine, climate changes lead to increased berry potassium (K
+ ) contents that result in must with low acidity. Consequently, wines are becoming 'flat' to the taste, with poor organoleptic properties and low potential aging, resulting in significant economic loss. Precise investigation into the molecular determinants controlling berry K+ accumulation during its development are only now emerging. Here, we report functional characterization by electrophysiology of a new grapevine Shaker-type K+ channel, VvK3.1. The analysis of VvK3.1 expression patterns was performed by qPCR and in situ hybridization. We found that VvK3.1 belongs to the AKT2 channel phylogenetic branch and is a weakly rectifying channel, mediating both inward and outward K+ currents. We showed that VvK3.1 is highly expressed in the phloem and in a unique structure located at the two ends of the petiole, identified as a pulvinus. From the onset of fruit ripening, all data support the role of the VvK3.1 channel in the massive K+ fluxes from the phloem cell cytosol to the berry apoplast during berry K+ loading. Moreover, the high amount of VvK3.1 transcripts detected in the pulvinus strongly suggests a role for this Shaker in the swelling and shrinking of motor cells involved in paraheliotropic leaf movements., (© 2018 The Authors. New Phytologist © 2018 New Phytologist Trust.)- Published
- 2019
- Full Text
- View/download PDF
29. [The ABC of abscisic acid action in plant drought stress responses].
- Author
-
Leung J, Valon C, Moreau B, Boeglin M, Lefoulon C, Joshi-Saha A, and Chérel I
- Subjects
- Adaptation, Physiological physiology, Animals, Humans, Photosynthesis physiology, Plant Stomata physiology, Plants metabolism, Signal Transduction physiology, Water metabolism, Abscisic Acid physiology, Droughts, Plant Physiological Phenomena, Stress, Physiological physiology
- Abstract
The combined daily consumption of fresh water ranges from 200 to 700 liters per capita per day in most developed countries, with about 70% being used for agricultural needs. Unlike other resources such as the different forms of energy, water has no other alternatives. With the looming prospect of global water crisis, the recent laudable success in deciphering the early steps in the signal transduction of the "stress hormone" abscisic acid (ABA) has ignited hopes that crops can be engineered with the capacity to maintain productivity while requiring less water input. Although ABA was first discovered in plants, it has resurfaced in the human brain (and many other non-plant organisms : sea sponge, some parasites, hydra to name a few), suggesting that its existence may be widespread. In humans, more amazingly, ABA has shown anti-inflammatory and antiviral properties. Even its receptors and key signaling intermediates have homologs in the human genome suggesting that evolution has re-fashioned these same proteins into new functional contexts. Thus, learning about the molecular mechanisms of ABA in action using the more flexible plant model will be likely beneficial to other organisms, and especially in human diseases, which is topical in the medical circle. ABA can accumulate up to 10 to 30-fold in plants under drought stress relative to unstressed conditions. The built up of the hormone then triggers diverse adaptive pathways permitting plants to withstand temporary bouts of water shortage. One favorite experimental model to unravel ABA signaling mechanisms in all of its intimate detail is based on the hormone's ability to elicit stomatal closure - a rapid cellular response of land plants to limit water loss through transpiration. Each microscopic stoma, or pore, is contoured by two specialized kidney-shaped cells called the guard cells. Because land plants are protected by a waxy cuticle impermeable to gas exchange, the stomatal pores are thus the primary portals for photosynthetic CO(2) uptake. Drought, by biasing pathways that lead to rapid closure of these pores, has therefore a negative impact on photosynthesis, and consequently, biomass as well. The stomatal aperture widens and narrows by expansion and contraction, respectively, of these flanking guard cells caused by changes in the intracellular concentrations of ion fluxes. These transport mechanisms most likely share fundamental principles with any excitable cell. These events require coordination of channels, vacuolar and membrane transporters that generate a specific pattern of electrical signals that relay the ABA stimulus. Research on ABA begun in the 1960's has now been crowned by the achievement of having identified the soluble ABA receptor that turns on and off the activities of a kinase/phosphatase pair, as the heart of the signaling complex. Results distilled from the latest structural studies on these ABA receptors, characterized by the so-called START domain, are beginning to tender the most exciting promise for rational design of agonists and antagonists towards modulating stress adaptive ability in plants. This review will chart the recent extraordinary progress that has enlightened us on how ABA controls membrane transport mechanisms that evoke the fast stomatal closing pathway., (© Société de Biologie, 2013.)
- Published
- 2012
- Full Text
- View/download PDF
30. Activation of VPAC1 receptors by VIP and PACAP-27 in human bronchial epithelial cells induces CFTR-dependent chloride secretion.
- Author
-
Dérand R, Montoni A, Bulteau-Pignoux L, Janet T, Moreau B, Muller JM, and Becq F
- Subjects
- Bronchi cytology, Bronchi drug effects, Cell Line, Colforsin pharmacology, Epithelial Cells drug effects, Glyburide pharmacology, Humans, Hypoglycemic Agents pharmacology, Iodides metabolism, Neuropeptides metabolism, Pituitary Adenylate Cyclase-Activating Polypeptide, RNA, Messenger biosynthesis, RNA, Messenger genetics, Receptors, Pituitary Adenylate Cyclase-Activating Polypeptide, Receptors, Pituitary Hormone metabolism, Receptors, Vasoactive Intestinal Peptide metabolism, Receptors, Vasoactive Intestinal Polypeptide, Type I, Reverse Transcriptase Polymerase Chain Reaction, Vasoactive Intestinal Peptide metabolism, Bronchi metabolism, Chlorides metabolism, Cystic Fibrosis Transmembrane Conductance Regulator physiology, Epithelial Cells metabolism, Neuropeptides pharmacology, Receptors, Vasoactive Intestinal Peptide agonists, Vasoactive Intestinal Peptide pharmacology
- Abstract
1. In the human airway epithelium, VIP/PACAP receptors are distributed in nerve fibers and in epithelial cells but their role in transepithelial ion transport have not been reported. Here, we show that human bronchial epithelial Calu-3 cells expressed the VPAC(1) receptor subtype which shares similar high affinity for VIP and PACAP-27. 2. The stoichiometric binding parameters characterizing the (125)I-VIP and (125)I-PACAP-27 binding to these receptors were determined. 3. We found that VIP (EC(50) approximately 7.6 nM) and PACAP-27 (EC(50) approximately 10 nM) stimulated glibenclamide-sensitive and DIDS-insensitive iodide efflux in Calu-3 cells. 4. The protein kinase A (PKA) inhibitor, H-89 and the protein kinase C (PKC) inhibitor, chelerythrine chloride prevented activation by both peptides demonstrating that PKA and PKC are part of the signaling pathway. This profile corresponds to the pharmacological signature of CFTR. 5. In the cystic fibrosis airway epithelial IB3-1 cell lacking functional CFTR but expressing VPAC(1) receptors, neither VIP, PACAP-27 nor forskolin stimulated chloride transport. 6. Ussing chamber experiments demonstrated stimulation of CFTR-dependent short-circuit currents by VIP or PACAP-27 applied to the basolateral but not to the apical side of Calu-3 cells monolayers. 7. This study shows the stimulation in human bronchial epithelial cells of CFTR-dependent chloride secretion following activation by VIP and PACAP-27 of basolateral VPAC(1) receptors.
- Published
- 2004
- Full Text
- View/download PDF
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