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Derrien B, Leblanc K, Evanno L, Drège E. Enantioselective Total Synthesis of the Neurotoxin Caramboxin. J Org Chem 2024; 89:6489-6493. [PMID: 38607991 DOI: 10.1021/acs.joc.4c00541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/14/2024]
Abstract
Herein, we report the first and efficient asymmetric total synthesis of the neurotoxin (-)-caramboxin. The key to success is the creation of a stereogenic center by using enantioselective catalytic phase-transfer α-alkylation of glycine imines, affording this unusual α-amino acid in good yields and up to 99% ee. This work validates the S configuration of the natural product.
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Affiliation(s)
- Benoit Derrien
- CNRS, BioCIS, Université Paris-Saclay, Orsay 91400, France
| | - Karine Leblanc
- CNRS, BioCIS, Université Paris-Saclay, Orsay 91400, France
| | - Laurent Evanno
- CNRS, BioCIS, Université Paris-Saclay, Orsay 91400, France
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2
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Leblond A, Nguyen A, Alcover C, Leblanc K, Gallard JF, Joseph D, Poupon E, Beniddir MA. Baldwin and Whitehead's Manzamine Alkaloids Biosynthesis Hypothesis Involves a Finely Tuned Reactivity of Acrolein: Automated Extraction of Reactivity Patterns from LC-MS 2 Data. Org Lett 2024; 26:2163-2168. [PMID: 38467014 DOI: 10.1021/acs.orglett.4c00194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/13/2024]
Abstract
Inspired by the multicomponent reaction-type scenario involving fatty dialdehydes, a nitrogen source, and acrolein, as a key C3 unit, put forward by Baldwin and Whitehead to explain the formation of manzamine-type alkaloids, 96 multicomponent reactions were designed, and their analytical readouts were deconvoluted using a herein-provided chemoinformatic workflow. This strategy pinpointed relevant conditions tuning the reactivity of acrolein to fulfill Baldwin and Whitehead's manzamine alkaloids biosynthetic hypothesis. This strategy can become part of a general method for the high-content analysis of multicomponent reactions applied to a natural product biosynthetic scenario.
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Affiliation(s)
- Axel Leblond
- Université Paris-Saclay, CNRS, BioCIS, Chimie des Substances Naturelles, 91400 Orsay, France
| | - Alexandre Nguyen
- Université Paris-Saclay, CNRS, BioCIS, Chimie des Substances Naturelles, 91400 Orsay, France
| | - Charlotte Alcover
- Université Paris-Saclay, CNRS, BioCIS, Chimie des Substances Naturelles, 91400 Orsay, France
| | - Karine Leblanc
- Université Paris-Saclay, CNRS, BioCIS, Chimie des Substances Naturelles, 91400 Orsay, France
| | - Jean-François Gallard
- Institut de Chimie des Substances Naturelles, Université Paris-Saclay, CNRS, UPR 2301, 91198 Gif-sur-Yvette, France
| | - Delphine Joseph
- Université Paris-Saclay, CNRS, BioCIS, Chimie des Substances Naturelles, 91400 Orsay, France
| | - Erwan Poupon
- Université Paris-Saclay, CNRS, BioCIS, Chimie des Substances Naturelles, 91400 Orsay, France
| | - Mehdi A Beniddir
- Université Paris-Saclay, CNRS, BioCIS, Chimie des Substances Naturelles, 91400 Orsay, France
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Szwarc S, Jagora A, Derbré S, Leblanc K, Rharrabti S, Said-Hassane C, El Kalamouni C, Gallard JF, Le Pogam P, Beniddir MA. Combination of Machine Learning and Empirical Computation for the Structural Validation of Trirosaline, a Natural Trimeric Monoterpene Indole Alkaloid from Catharanthus roseus. Org Lett 2024; 26:274-279. [PMID: 38134219 DOI: 10.1021/acs.orglett.3c03972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2023]
Abstract
Chemical investigation of the emblematic Catharanthus roseus led to the discovery of trirosaline (1), the first example of a tris-ajmalicine-type monoterpene indole alkaloid and the first natural trimeric MIA ever reported from this deeply dug plant species. Its structure was primarily elucidated based on NMR and HRESIMS analyses, and the nature of its unique intermonomeric linkages was firmly confirmed based on a combination of empirical computation and ML-J-DP4 study. Its absolute configuration was mitigated by comparison of experimental and TDDFT-simulated electronic circular dichroism (ECD) spectra. A possible biosynthetic pathway for trirosaline (1) was postulated.
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Affiliation(s)
- Sarah Szwarc
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 17 avenue des Sciences, 91400 Orsay, France
| | - Adrien Jagora
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 17 avenue des Sciences, 91400 Orsay, France
| | - Séverine Derbré
- Université Angers, SONAS, SFR QUASAV, Faculty of Health Sciences, Department of Pharmacy, 16 Bd Daviers, 49045 CEDEX 01 Angers, France
| | - Karine Leblanc
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 17 avenue des Sciences, 91400 Orsay, France
| | - Somia Rharrabti
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 17 avenue des Sciences, 91400 Orsay, France
| | - Charifat Said-Hassane
- Unité Mixte Processus Infectieux en Milieu Insulaire Tropical, Université de la Réunion, INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490 Sainte Clotilde, La Réunion, France
| | - Chaker El Kalamouni
- Unité Mixte Processus Infectieux en Milieu Insulaire Tropical, Université de la Réunion, INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490 Sainte Clotilde, La Réunion, France
| | - Jean-François Gallard
- Institut de Chimie des Substances Naturelles, CNRS, ICSN UPR 2301, Université Paris-Saclay, 91198 Gif-sur-Yvette, France
| | - Pierre Le Pogam
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 17 avenue des Sciences, 91400 Orsay, France
| | - Mehdi A Beniddir
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 17 avenue des Sciences, 91400 Orsay, France
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Vásquez-Ocmín PG, Cojean S, Roumy V, Marti G, Pomel S, Gadea A, Leblanc K, Dennemont I, Ruiz-Vásquez L, Ricopa Cotrina H, Ruiz Mesia W, Bertani S, Ruiz Mesia L, Maciuk A. Deciphering anti-infectious compounds from Peruvian medicinal Cordoncillos extract library through multiplexed assays and chemical profiling. Front Pharmacol 2023; 14:1100542. [PMID: 37342590 PMCID: PMC10278888 DOI: 10.3389/fphar.2023.1100542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 05/04/2023] [Indexed: 06/23/2023] Open
Abstract
High prevalence of parasitic or bacterial infectious diseases in some world areas is due to multiple reasons, including a lack of an appropriate health policy, challenging logistics and poverty. The support to research and development of new medicines to fight infectious diseases is one of the sustainable development goals promoted by World Health Organization (WHO). In this sense, the traditional medicinal knowledge substantiated by ethnopharmacology is a valuable starting point for drug discovery. This work aims at the scientific validation of the traditional use of Piper species ("Cordoncillos") as firsthand anti-infectious medicines. For this purpose, we adapted a computational statistical model to correlate the LCMS chemical profiles of 54 extracts from 19 Piper species to their corresponding anti-infectious assay results based on 37 microbial or parasites strains. We mainly identified two groups of bioactive compounds (called features as they are considered at the analytical level and are not formally isolated). Group 1 is composed of 11 features being highly correlated to an inhibiting activity on 21 bacteria (principally Gram-positive strains), one fungus (C. albicans), and one parasite (Trypanosoma brucei gambiense). The group 2 is composed of 9 features having a clear selectivity on Leishmania (all strains, both axenic and intramacrophagic). Bioactive features in group 1 were identified principally in the extracts of Piper strigosum and P. xanthostachyum. In group 2, bioactive features were distributed in the extracts of 14 Piper species. This multiplexed approach provided a broad picture of the metabolome as well as a map of compounds putatively associated to bioactivity. To our knowledge, the implementation of this type of metabolomics tools aimed at identifying bioactive compounds has not been used so far.
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Affiliation(s)
| | - Sandrine Cojean
- Université Paris-Saclay, CNRS, BioCIS, Orsay, France
- CNR Du Paludisme, AP-HP, Hôpital Bichat–Claude Bernard, Paris, France
| | - Vincent Roumy
- Joint Research Unit 1158 BioEcoAgro, University Lille, JUNIA, INRAE, University Liège, UPJV, University Artois, ULCO, VilleneuveD’Ascq, France
| | - Guillaume Marti
- Laboratoire de Recherche en Sciences Végétales (UMR 5546), CNRS, Université de Toulouse, Toulouse, France
- MetaboHUB, National Infrastructure of Metabolomics and Fluxomics, Toulouse, France
| | | | - Alice Gadea
- UMR152 PHARMADEV, IRD, UPS, Université de Toulouse, Toulouse, France
| | | | | | - Liliana Ruiz-Vásquez
- Facultad de Farmacia y Bioquímica, Universidad Nacional de la Amazonía Peruana (UNAP), Iquitos, Peru
- Centro de Investigación de Recursos Naturales, Universidad Nacional de la Amazonía Peruana (UNAP), Iquitos, Peru
| | - Hivelli Ricopa Cotrina
- Centro de Investigación de Recursos Naturales, Universidad Nacional de la Amazonía Peruana (UNAP), Iquitos, Peru
| | - Wilfredo Ruiz Mesia
- Facultad de Ingeniería Química, Universidad Nacional de la Amazonía Peruana (UNAP), Iquitos, Peru
| | - Stéphane Bertani
- UMR152 PHARMADEV, IRD, UPS, Université de Toulouse, Toulouse, France
- International Joint Laboratory of Molecular Anthropological Oncology (LOAM), National Cancer Institute, Lima, Perú
| | - Lastenia Ruiz Mesia
- Centro de Investigación de Recursos Naturales, Universidad Nacional de la Amazonía Peruana (UNAP), Iquitos, Peru
- Facultad de Ingeniería Química, Universidad Nacional de la Amazonía Peruana (UNAP), Iquitos, Peru
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Benavides M, Bonnet S, Le Moigne FAC, Armin G, Inomura K, Hallstrøm S, Riemann L, Berman-Frank I, Poletti E, Garel M, Grosso O, Leblanc K, Guigue C, Tedetti M, Dupouy C. Sinking Trichodesmium fixes nitrogen in the dark ocean. ISME J 2022; 16:2398-2405. [PMID: 35835942 PMCID: PMC9478103 DOI: 10.1038/s41396-022-01289-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 06/29/2022] [Accepted: 07/05/2022] [Indexed: 01/04/2023]
Abstract
The photosynthetic cyanobacterium Trichodesmium is widely distributed in the surface low latitude ocean where it contributes significantly to N2 fixation and primary productivity. Previous studies found nifH genes and intact Trichodesmium colonies in the sunlight-deprived meso- and bathypelagic layers of the ocean (200-4000 m depth). Yet, the ability of Trichodesmium to fix N2 in the dark ocean has not been explored. We performed 15N2 incubations in sediment traps at 170, 270 and 1000 m at two locations in the South Pacific. Sinking Trichodesmium colonies fixed N2 at similar rates than previously observed in the surface ocean (36-214 fmol N cell-1 d-1). This activity accounted for 40 ± 28% of the bulk N2 fixation rates measured in the traps, indicating that other diazotrophs were also active in the mesopelagic zone. Accordingly, cDNA nifH amplicon sequencing revealed that while Trichodesmium accounted for most of the expressed nifH genes in the traps, other diazotrophs such as Chlorobium and Deltaproteobacteria were also active. Laboratory experiments simulating mesopelagic conditions confirmed that increasing hydrostatic pressure and decreasing temperature reduced but did not completely inhibit N2 fixation in Trichodesmium. Finally, using a cell metabolism model we predict that Trichodesmium uses photosynthesis-derived stored carbon to sustain N2 fixation while sinking into the mesopelagic. We conclude that sinking Trichodesmium provides ammonium, dissolved organic matter and biomass to mesopelagic prokaryotes.
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Affiliation(s)
- Mar Benavides
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France.
- Turing Center for Living Systems, Aix-Marseille University, 13009, Marseille, France.
| | - Sophie Bonnet
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
| | - Frédéric A C Le Moigne
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
- LEMAR, Laboratoire des Sciences de l'Environnement Marin, UMR6539, CNRS, UBO, IFREMER, IRD, 29280, Plouzané, Technopôle Brest-Iroise, France
| | - Gabrielle Armin
- Graduate School of Oceanography, University of Rhode Island, South Kingstown, RI, USA
| | - Keisuke Inomura
- Graduate School of Oceanography, University of Rhode Island, South Kingstown, RI, USA
| | - Søren Hallstrøm
- Marine Biological Section, Department of Biology, University of Copenhagen, Helsingør, Denmark
| | - Lasse Riemann
- Marine Biological Section, Department of Biology, University of Copenhagen, Helsingør, Denmark
| | - Ilana Berman-Frank
- Department of Marine Biology, Leon H. Charney School of Marine Sciences, University of Haifa, Mt, Carmel, Haifa, Israel
| | - Emilie Poletti
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
| | - Marc Garel
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
| | - Olivier Grosso
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
| | - Karine Leblanc
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
| | - Catherine Guigue
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
| | - Marc Tedetti
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
| | - Cécile Dupouy
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, 13288, Marseille, France
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Leblond A, Houari I, Beauxis Y, Leblanc K, Poupon E, Beniddir MA. Chemoinformatic Exploration of "Bioinspired Metabolomes" Illuminates Diacetyl Assembly Pathways Toward Nesteretal A-Like Cage Molecules. Org Lett 2022; 24:1247-1252. [PMID: 35112872 DOI: 10.1021/acs.orglett.2c00108] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An appealing and challenging cage structure along with an unusual biosynthetic pathway prompted us to explore an expeditious bioinspired one-pot total synthesis of nesteretal A. An unconventional strategy was chosen, and a cascade reaction starting from diacetyl was studied. Under organocatalytic conditions mimicking an aldolase, nesteretal A and a related cage analogue were anticipated by in silico metabolization, detected, targeted, and characterized.
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Affiliation(s)
- Axel Leblond
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 5 rue J.-B. Clément, 92290 Châtenay-Malabry, France
| | - Inès Houari
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 5 rue J.-B. Clément, 92290 Châtenay-Malabry, France
| | - Yann Beauxis
- Université de Paris, CNRS, CiTCoM, F-75006 Paris, France
| | - Karine Leblanc
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 5 rue J.-B. Clément, 92290 Châtenay-Malabry, France
| | - Erwan Poupon
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 5 rue J.-B. Clément, 92290 Châtenay-Malabry, France
| | - Mehdi A Beniddir
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 5 rue J.-B. Clément, 92290 Châtenay-Malabry, France
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7
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Harfouche A, Alata W, Leblanc K, Heslaut G, Figadère B, Maciuk A. Label-free LC/HRMS-based enzymatic activity assay for the detection of DDC, MAO and COMT inhibitors. J Pharm Biomed Anal 2022; 212:114598. [DOI: 10.1016/j.jpba.2022.114598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 01/12/2022] [Accepted: 01/16/2022] [Indexed: 10/19/2022]
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Fouotsa H, Mkounga P, Lannang AM, Vanheuverzwijn J, Zhou Z, Leblanc K, Rharrabti S, Nkengfack AE, Gallard JF, Fontaine V, Meyer F, Poupon E, Le Pogam P, Beniddir MA. Pyrrovobasine, hybrid alkylated pyrraline monoterpene indole alkaloid pseudodimer discovered using a combination of mass spectral and NMR-based machine learning annotations. Org Biomol Chem 2021; 20:98-105. [PMID: 34596204 DOI: 10.1039/d1ob01791h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A new vobasine-tryptamine-based monoterpene indole alkaloid pseudodimer was isolated from the stem bark of Voacanga africana. As a minor constituent occurring in a thoroughly investigated plant, this molecule was targeted based on a molecular networking strategy and a rational MS2-guided phytochemical investigation led to its isolation. Its structure was formally established based on HRMS, 1D/2D NMR data, and the application of the tool Small Molecule Accurate Recognition Technology (SMART 2.0). Its absolute configuration was assigned by the exciton chirality method and TD-DFT ECD calculations. Besides featuring an unprecedented intermonomeric linkage in the small group of vobasine/tryptamine hybrids, pyrrovobasine also represents the first pyrraline-containing representative in the whole monoterpene indole alkaloids group. Biosynthetic hypotheses possibly underpinning these structural oddities are proposed here.
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Affiliation(s)
- Hugues Fouotsa
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 5 rue J.-B. Clément, 92290 Châtenay-Malabry, France. .,Faculty of Pharmacy, Microbiology, Bioorganic and Macromolecular Chemistry Unit, Université Libre de Bruxelles, Campus de la Plaine-CP 206/04, Boulevard du Triomphe, ACC.2, Po Box 1050, Belgium.,Department of Organic Chemistry, Faculty of Science, University of Yaoundé I, P.O. Box 812, Yaoundé, Cameroon
| | - Pierre Mkounga
- Department of Organic Chemistry, Faculty of Science, University of Yaoundé I, P.O. Box 812, Yaoundé, Cameroon
| | - Alain Meli Lannang
- Department of Chemistry, Higher Teachers Training College, University of Maroua, P.O. Box 55, Maroua, Cameroon
| | - Jérôme Vanheuverzwijn
- Faculty of Pharmacy, Microbiology, Bioorganic and Macromolecular Chemistry Unit, Université Libre de Bruxelles, Campus de la Plaine-CP 206/04, Boulevard du Triomphe, ACC.2, Po Box 1050, Belgium
| | - Zhiyu Zhou
- Faculty of Pharmacy, Microbiology, Bioorganic and Macromolecular Chemistry Unit, Université Libre de Bruxelles, Campus de la Plaine-CP 206/04, Boulevard du Triomphe, ACC.2, Po Box 1050, Belgium
| | - Karine Leblanc
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 5 rue J.-B. Clément, 92290 Châtenay-Malabry, France.
| | - Somia Rharrabti
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 5 rue J.-B. Clément, 92290 Châtenay-Malabry, France.
| | - Augustin Ephrem Nkengfack
- Department of Organic Chemistry, Faculty of Science, University of Yaoundé I, P.O. Box 812, Yaoundé, Cameroon
| | - Jean-François Gallard
- Institut de Chimie des Substances Naturelles, CNRS, ICSN UPR 2301, Université Paris-Saclay, 91198 Gif-sur-Yvette, France
| | - Véronique Fontaine
- Faculty of Pharmacy, Microbiology, Bioorganic and Macromolecular Chemistry Unit, Université Libre de Bruxelles, Campus de la Plaine-CP 206/04, Boulevard du Triomphe, ACC.2, Po Box 1050, Belgium
| | - Franck Meyer
- Faculty of Pharmacy, Microbiology, Bioorganic and Macromolecular Chemistry Unit, Université Libre de Bruxelles, Campus de la Plaine-CP 206/04, Boulevard du Triomphe, ACC.2, Po Box 1050, Belgium
| | - Erwan Poupon
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 5 rue J.-B. Clément, 92290 Châtenay-Malabry, France.
| | - Pierre Le Pogam
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 5 rue J.-B. Clément, 92290 Châtenay-Malabry, France.
| | - Mehdi A Beniddir
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 5 rue J.-B. Clément, 92290 Châtenay-Malabry, France.
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9
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Fouotsa H, Le Pogam P, Mkounga P, Lannang AM, Bernadat G, Vanheuverzwijn J, Zhou Z, Leblanc K, Rharrabti S, Nkengfack AE, Gallard JF, Fontaine V, Meyer F, Poupon E, Beniddir MA. Voatriafricanines A and B, Trimeric Vobasine-Aspidosperma-Aspidosperma Alkaloids from Voacanga africana. J Nat Prod 2021; 84:2755-2761. [PMID: 34569237 DOI: 10.1021/acs.jnatprod.1c00812] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Voatriafricanines A and B (1 and 2), the first examples of vobasine-aspidosperma-aspidosperma monoterpene trisindole alkaloids, were isolated from the stem barks of Voacanga africana, guided by a molecular networking strategy. Their structures, including absolute configurations, were elucidated by spectroscopic methods and ECD calculations. Compounds 1 and 2 possess intramolecular hydrogen bonding, sufficiently robust to transfer homonuclear and heteronuclear magnetizations. Compound 1 exhibited potent antimycobacterial activity with no discernible cytotoxic activity.
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Affiliation(s)
- Hugues Fouotsa
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 5 Rue J.-B. Clément, 92290 Châtenay-Malabry, France
- Department of Organic Chemistry, Faculty of Science, University of Yaoundé I, P.O. Box 812, Yaoundé, Cameroon
- Faculty of Pharmacy, Microbiology, Bioorganic and Macromolecular Chemistry Unit, Université Libre de Bruxelles, Campus de la Plaine-CP 206/04, Boulevard du Triomphe, ACC.2, PO Box 1050, 1050 Bruxelles, Belgium
| | - Pierre Le Pogam
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 5 Rue J.-B. Clément, 92290 Châtenay-Malabry, France
| | - Pierre Mkounga
- Department of Organic Chemistry, Faculty of Science, University of Yaoundé I, P.O. Box 812, Yaoundé, Cameroon
| | - Alain Meli Lannang
- Department of Chemistry, Higher Teachers Training College, University of Maroua, P.O. Box 55, Maroua, Cameroon
| | - Guillaume Bernadat
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 5 Rue J.-B. Clément, 92290 Châtenay-Malabry, France
| | - Jérôme Vanheuverzwijn
- Faculty of Pharmacy, Microbiology, Bioorganic and Macromolecular Chemistry Unit, Université Libre de Bruxelles, Campus de la Plaine-CP 206/04, Boulevard du Triomphe, ACC.2, PO Box 1050, 1050 Bruxelles, Belgium
| | - Zhiyu Zhou
- Faculty of Pharmacy, Microbiology, Bioorganic and Macromolecular Chemistry Unit, Université Libre de Bruxelles, Campus de la Plaine-CP 206/04, Boulevard du Triomphe, ACC.2, PO Box 1050, 1050 Bruxelles, Belgium
| | - Karine Leblanc
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 5 Rue J.-B. Clément, 92290 Châtenay-Malabry, France
| | - Somia Rharrabti
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 5 Rue J.-B. Clément, 92290 Châtenay-Malabry, France
| | - Augustin Ephrem Nkengfack
- Department of Organic Chemistry, Faculty of Science, University of Yaoundé I, P.O. Box 812, Yaoundé, Cameroon
| | - Jean-François Gallard
- Institut de Chimie des Substances Naturelles, CNRS, ICSN UPR 2301, Université Paris-Saclay, 91198 Gif-sur-Yvette, France
| | - Véronique Fontaine
- Faculty of Pharmacy, Microbiology, Bioorganic and Macromolecular Chemistry Unit, Université Libre de Bruxelles, Campus de la Plaine-CP 206/04, Boulevard du Triomphe, ACC.2, PO Box 1050, 1050 Bruxelles, Belgium
| | - Franck Meyer
- Faculty of Pharmacy, Microbiology, Bioorganic and Macromolecular Chemistry Unit, Université Libre de Bruxelles, Campus de la Plaine-CP 206/04, Boulevard du Triomphe, ACC.2, PO Box 1050, 1050 Bruxelles, Belgium
| | - Erwan Poupon
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 5 Rue J.-B. Clément, 92290 Châtenay-Malabry, France
| | - Mehdi A Beniddir
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 5 Rue J.-B. Clément, 92290 Châtenay-Malabry, France
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10
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Poirier C, Carter A, Kwan Y, Selvanathan C, Koo J, Westlund J, Leblanc K. ATRIAL FIBRILLATION PATIENTS' EXPERIENCES WITH COMBINATION ANTITHROMBOTIC THERAPY POST-PERCUTANEOUS CORONARY INTERVENTION. Can J Cardiol 2021. [DOI: 10.1016/j.cjca.2021.07.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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11
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Kouamé T, Bernadat G, Turpin V, Litaudon M, Okpekon AT, Gallard JF, Leblanc K, Rharrabti S, Champy P, Poupon E, Beniddir MA, Le Pogam P. Structure Reassignment of Melonine and Quantum-Chemical Calculations-Based Assessment of Biosynthetic Scenarios Leading to Its Revised and Original Structures. Org Lett 2021; 23:5964-5968. [PMID: 34270272 DOI: 10.1021/acs.orglett.1c02055] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Melonine is a basic monoterpene indole alkaloid (MIA) skeleton from Melodinus philliraeoides that was reported in 1983. The scarcity of its spectroscopic data questioned the validity of its structure. This prompted us to reisolate this molecule and to revise its structure into an unprecedented MIA scaffold. DFT-validated biosynthetic paths to both this new core and the originally reported form are proposed. The pathway to the original structure of melonine seems to be thermodynamically feasible, and that compound may exist as a natural product.
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Affiliation(s)
- Tapé Kouamé
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 5 rue J.-B. Clément, 92290 Châtenay-Malabry, France.,Laboratoire de Chimie Organique et de Substances Naturelles (LCOSN), UFR Sciences des Structures de la Matière et Technologie, Université Félix Houphouët-Boigny, BP 582 Abidjan 22, Côte d'Ivoire
| | - Guillaume Bernadat
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 5 rue J.-B. Clément, 92290 Châtenay-Malabry, France
| | - Victor Turpin
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 5 rue J.-B. Clément, 92290 Châtenay-Malabry, France
| | - Marc Litaudon
- Institut de Chimie des Substances Naturelles, CNRS, ICSN UPR 2301, Université Paris-Saclay, 91198 Gif-sur-Yvette, France
| | - Aboua Timothée Okpekon
- Laboratoire de Chimie Organique et de Substances Naturelles (LCOSN), UFR Sciences des Structures de la Matière et Technologie, Université Félix Houphouët-Boigny, BP 582 Abidjan 22, Côte d'Ivoire
| | - Jean-François Gallard
- Institut de Chimie des Substances Naturelles, CNRS, ICSN UPR 2301, Université Paris-Saclay, 91198 Gif-sur-Yvette, France
| | - Karine Leblanc
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 5 rue J.-B. Clément, 92290 Châtenay-Malabry, France
| | - Somia Rharrabti
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 5 rue J.-B. Clément, 92290 Châtenay-Malabry, France
| | - Pierre Champy
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 5 rue J.-B. Clément, 92290 Châtenay-Malabry, France
| | - Erwan Poupon
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 5 rue J.-B. Clément, 92290 Châtenay-Malabry, France
| | - Mehdi A Beniddir
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 5 rue J.-B. Clément, 92290 Châtenay-Malabry, France
| | - Pierre Le Pogam
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 5 rue J.-B. Clément, 92290 Châtenay-Malabry, France
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12
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N'Tamon AD, Okpekon AT, Bony NF, Bernadat G, Gallard JF, Kouamé T, Séon-Méniel B, Leblanc K, Rharrabti S, Mouray E, Grellier P, Ake M, Amin NC, Champy P, Beniddir MA, Le Pogam P. Streamlined targeting of Amaryllidaceae alkaloids from the bulbs of Crinum scillifolium using spectrometric and taxonomically-informed scoring metabolite annotations. Phytochemistry 2020; 179:112485. [PMID: 32861139 DOI: 10.1016/j.phytochem.2020.112485] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 07/07/2020] [Accepted: 08/07/2020] [Indexed: 06/11/2023]
Abstract
Four undescribed alkaloids have been isolated from the bulbs of the previously unstudied Crinum scillifolium. These compounds were targeted following a state-of-the-art molecular networking strategy comprising a dereplication against in silico databases and re-ranking of the candidate structures based on taxonomically informed scoring. The unreported structures span across a variety of Amaryllidaceae alkaloids appendages. Their structures were unambiguously elucidated by thorough interpretation of their HRESIMS and 1D and 2D NMR data, and comparison to literature data. DFT-NMR calculations were performed to support the determined relative configurations of scillitazettine and scilli-N-desmethylpretazettine and their absolute configurations were mitigated by comparison between experimental and theoretically calculated ECD spectra. The lack of a methyl group on the nitrogen atom in the structure of scilli-N-desmethylpretazettine series is highly unusual in the pretazettine/tazettine series but the most original structural feature in it lies in its 11α disposed hydrogen, which is new to pretazettines. The antiplasmodial as well as the cytotoxic activities against the human colon cancer cell line HCT116 were evaluated, revealing mild to null activities.
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Affiliation(s)
- Amon Diane N'Tamon
- Université Paris-Saclay, CNRS, BioCIS, 92290, Châtenay-Malabry, France; Département de Chimie Analytique, Minérale et Générale, Technologie Alimentaire, UFR Sciences Pharmaceutiques et Biologiques, Univ. FHB, 06 B. P. 2256, Abidjan 06, Cote d'Ivoire
| | - Aboua Timothée Okpekon
- Laboratoire de Chimie Organique et de Substances Naturelles (LCOSN), UFR Sciences des Structures de la Matière et Technologie, Univ. FHB, 22 BP 582, Abidjan 22, Cote d'Ivoire
| | - Nicaise F Bony
- Département de Chimie Analytique, Minérale et Générale, Technologie Alimentaire, UFR Sciences Pharmaceutiques et Biologiques, Univ. FHB, 06 B. P. 2256, Abidjan 06, Cote d'Ivoire
| | | | - Jean-François Gallard
- Institut de Chimie des Substances Naturelles, CNRS, ICSN UPR 2301, Université Paris-Saclay, 21 Avenue de la Terrasse, 91198, Gif-sur-Yvette, France
| | - Tapé Kouamé
- Université Paris-Saclay, CNRS, BioCIS, 92290, Châtenay-Malabry, France; Laboratoire de Chimie Organique et de Substances Naturelles (LCOSN), UFR Sciences des Structures de la Matière et Technologie, Univ. FHB, 22 BP 582, Abidjan 22, Cote d'Ivoire
| | | | - Karine Leblanc
- Université Paris-Saclay, CNRS, BioCIS, 92290, Châtenay-Malabry, France
| | - Somia Rharrabti
- Université Paris-Saclay, CNRS, BioCIS, 92290, Châtenay-Malabry, France
| | - Elisabeth Mouray
- Muséum National d'Histoire Naturelle, Unité Molécules de Communication et Adaptation des Micro-organismes, UMR7245, CP54, 57, Rue Cuvier, 75005, Paris, France
| | - Philippe Grellier
- Muséum National d'Histoire Naturelle, Unité Molécules de Communication et Adaptation des Micro-organismes, UMR7245, CP54, 57, Rue Cuvier, 75005, Paris, France
| | - Michèle Ake
- Département de Chimie Analytique, Minérale et Générale, Technologie Alimentaire, UFR Sciences Pharmaceutiques et Biologiques, Univ. FHB, 06 B. P. 2256, Abidjan 06, Cote d'Ivoire
| | - N'Cho Christophe Amin
- Département de Chimie Analytique, Minérale et Générale, Technologie Alimentaire, UFR Sciences Pharmaceutiques et Biologiques, Univ. FHB, 06 B. P. 2256, Abidjan 06, Cote d'Ivoire
| | - Pierre Champy
- Université Paris-Saclay, CNRS, BioCIS, 92290, Châtenay-Malabry, France
| | - Mehdi A Beniddir
- Université Paris-Saclay, CNRS, BioCIS, 92290, Châtenay-Malabry, France.
| | - Pierre Le Pogam
- Université Paris-Saclay, CNRS, BioCIS, 92290, Châtenay-Malabry, France.
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13
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Dorian P, Bhatia R, Lebovic G, Leblanc K, Meshkat N, Mamdani M, Timofeeva M, Ha A, Morra D. TRANSITIONING EMERGENCY ATRIAL FIBRILLATION MANAGEMENT (TEAM): INTERIM ANALYSIS OF IMPACT ON CLINICAL OUTCOMES. Can J Cardiol 2020. [DOI: 10.1016/j.cjca.2020.07.115] [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: 10/23/2022] Open
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14
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Turpin V, Beniddir MA, Genta-Jouve G, Skiredj A, Gallard JF, Leblanc K, Le Pogam P, Poupon E. In Silico Anticipation of Metabolic Pathways Extended to Organic Chemistry Reactions: A Case Study with Caffeine Alkaline Hydrolysis and The Origin of Camellimidazoles. Chemistry 2020; 26:12936-12940. [PMID: 32726504 DOI: 10.1002/chem.202002196] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 07/24/2020] [Indexed: 11/06/2022]
Abstract
Camellimidazoles A-C were recently reported as natural substances in Keemun black tea. Although a "biosynthetic" route to these intriguing imidazole dimers was proposed from caffeine by the authors in this seminal report, we envisioned that a artefactual scenario, consisting of alkaline hydrolysis of caffeine and spontaneous cascade reactions with a methylene donor such as formaldehyde or methylene chloride, could also have led to their formation. To capture the diversity of molecules obtained under these conditions (i.e. alkaline treatment of caffeine/formaldehyde), an in silico MetWork-based pipeline was implemented, highlighting the sought-after camellimidazoles B and C. A wealth of further compounds were also tagged, notably comprising the herein newly described and unnatural camellimidazoles D-F that were subsequently confirmed as anticipated in silico upon extensive spectroscopic analyses. Likewise, camellimidazoles B and C could also be obtained using methylene chloride as an alternative methylene donor which may also have occurred in the initial phytochemical pipeline that implied this solvent. The current investigation emphasizes the fitness of MetWork tagging to extend the logic of in silico anticipation of metabolic pathways to organic chemistry reactions.
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Affiliation(s)
- Victor Turpin
- Chimie des Substances Naturelles, BioCIS, Université Paris-Saclay, CNRS, 92290, Châtenay-Malabry, France
| | - Mehdi A Beniddir
- Chimie des Substances Naturelles, BioCIS, Université Paris-Saclay, CNRS, 92290, Châtenay-Malabry, France
| | - Grégory Genta-Jouve
- Laboratoire de Chimie-Toxicologie Analytique et Cellulaire (C-TAC), UMR CNRS 8038 CiTCoM, Université de Paris, 4, Avenue de l'Observatoire, 75006, Paris, France.,Laboratoire Écologie, Évolution, Interactions des, Systèmes Amazoniens (LEEISA), USR 3456, Université de Guyane, CNRS Guyane, 275, route de Montabo, 97334, Cayenne, French Guiana
| | - Adam Skiredj
- Chimie des Substances Naturelles, BioCIS, Université Paris-Saclay, CNRS, 92290, Châtenay-Malabry, France
| | - Jean-François Gallard
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Saclay, 1, avenue de la Terrasse, 91198, Gif-sur-Yvette, France
| | - Karine Leblanc
- Chimie des Substances Naturelles, BioCIS, Université Paris-Saclay, CNRS, 92290, Châtenay-Malabry, France
| | - Pierre Le Pogam
- Chimie des Substances Naturelles, BioCIS, Université Paris-Saclay, CNRS, 92290, Châtenay-Malabry, France
| | - Erwan Poupon
- Chimie des Substances Naturelles, BioCIS, Université Paris-Saclay, CNRS, 92290, Châtenay-Malabry, France
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15
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Kablan ACL, Konan JD, Komlaga G, Kabran FA, Daouda B, N'Tamon AD, Kouamé T, Jagora A, Leblanc K, Seon-Méniel B, Beniddir MA, Attioua KB, Le Pogam P, Champy P. Five new cassane diterpenes from the seeds and bark of Erythrophleum suaveolens. Fitoterapia 2020; 146:104700. [PMID: 32763366 DOI: 10.1016/j.fitote.2020.104700] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 07/31/2020] [Accepted: 07/31/2020] [Indexed: 10/23/2022]
Abstract
Five new cassane-type diterpenoid heterosides, i. e. two cassane-type amides (1-2), two erythrophlamine-type amine esters (3-4) and a non‑nitrogenous erythrophlamine analogue (5) were isolated from the root barks (1-2) and the seeds (3-5) of Erythrophleum suaveolens. Their structures were unambiguously established by interpretation of their HRESIMS, 1D and 2D NMR data, and chemical degradation for sugar determination. Compounds 3-5 were evaluated for their cytotoxicity against a panel of three cell lines, revealing modest to strong activities.
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Affiliation(s)
- Ahmont Claude Landry Kablan
- UFR des Sciences Biologiques, Université Peleforo Gon Coulibaly, BP 1328 Korhogo, Cote d'Ivoire; Laboratoire de Chimie Organique et de Substances Naturelles, UFR Sciences des Structures de la Matiere et Technologie, Universite Felix Houphouet-Boigny, 22 BP 582 Abidjan 22, Cote d'Ivoire; Équipe Chimie des Substances Naturelles, BioCIS, Université Paris-Saclay, CNRS, 5 Rue J.-B. Clément, 92290 Châtenay-Malabry, France
| | - Jacques Dibi Konan
- Laboratoire de Chimie Organique et de Substances Naturelles, UFR Sciences des Structures de la Matiere et Technologie, Universite Felix Houphouet-Boigny, 22 BP 582 Abidjan 22, Cote d'Ivoire; Équipe Chimie des Substances Naturelles, BioCIS, Université Paris-Saclay, CNRS, 5 Rue J.-B. Clément, 92290 Châtenay-Malabry, France
| | - Gustav Komlaga
- Department of Pharmacognosy, Faculty of Pharmacy and Pharmaceutical Sciences, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Faustin Aka Kabran
- Laboratoire de Chimie Organique et de Substances Naturelles, UFR Sciences des Structures de la Matiere et Technologie, Universite Felix Houphouet-Boigny, 22 BP 582 Abidjan 22, Cote d'Ivoire
| | - Ballo Daouda
- Laboratoire de Chimie Organique et de Substances Naturelles, UFR Sciences des Structures de la Matiere et Technologie, Universite Felix Houphouet-Boigny, 22 BP 582 Abidjan 22, Cote d'Ivoire
| | - Amon Diane N'Tamon
- Équipe Chimie des Substances Naturelles, BioCIS, Université Paris-Saclay, CNRS, 5 Rue J.-B. Clément, 92290 Châtenay-Malabry, France; Department of Analytical Chemistry, Mineral and General Chemistry, Training and Research Unit (UFR) of Pharmaceutical and Biological Sciences, Félix Houphouët Boigny University, Cote d'Ivoire
| | - Tapé Kouamé
- Laboratoire de Chimie Organique et de Substances Naturelles, UFR Sciences des Structures de la Matiere et Technologie, Universite Felix Houphouet-Boigny, 22 BP 582 Abidjan 22, Cote d'Ivoire; Department of Analytical Chemistry, Mineral and General Chemistry, Training and Research Unit (UFR) of Pharmaceutical and Biological Sciences, Félix Houphouët Boigny University, Cote d'Ivoire
| | - Adrien Jagora
- Équipe Chimie des Substances Naturelles, BioCIS, Université Paris-Saclay, CNRS, 5 Rue J.-B. Clément, 92290 Châtenay-Malabry, France
| | - Karine Leblanc
- Équipe Chimie des Substances Naturelles, BioCIS, Université Paris-Saclay, CNRS, 5 Rue J.-B. Clément, 92290 Châtenay-Malabry, France
| | - Blandine Seon-Méniel
- Équipe Chimie des Substances Naturelles, BioCIS, Université Paris-Saclay, CNRS, 5 Rue J.-B. Clément, 92290 Châtenay-Malabry, France
| | - Mehdi A Beniddir
- Équipe Chimie des Substances Naturelles, BioCIS, Université Paris-Saclay, CNRS, 5 Rue J.-B. Clément, 92290 Châtenay-Malabry, France
| | - Koffi Barthélemy Attioua
- Laboratoire de Chimie Organique et de Substances Naturelles, UFR Sciences des Structures de la Matiere et Technologie, Universite Felix Houphouet-Boigny, 22 BP 582 Abidjan 22, Cote d'Ivoire
| | - Pierre Le Pogam
- Équipe Chimie des Substances Naturelles, BioCIS, Université Paris-Saclay, CNRS, 5 Rue J.-B. Clément, 92290 Châtenay-Malabry, France.
| | - Pierre Champy
- Équipe Chimie des Substances Naturelles, BioCIS, Université Paris-Saclay, CNRS, 5 Rue J.-B. Clément, 92290 Châtenay-Malabry, France
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16
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Kouamé T, Okpekon AT, Bony NF, N’Tamon AD, Gallard JF, Rharrabti S, Leblanc K, Mouray E, Grellier P, Champy P, Beniddir MA, Le Pogam P. Corynanthean-Epicatechin Flavoalkaloids from Corynanthe pachyceras. Molecules 2020; 25:E2654. [PMID: 32517373 PMCID: PMC7321195 DOI: 10.3390/molecules25112654] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 06/05/2020] [Accepted: 06/05/2020] [Indexed: 11/17/2022] Open
Abstract
Epicatechocorynantheines A and B, and epicatechocorynantheidine were isolated from the stem bark of Corynanthe pachyceras. These molecules were pinpointed, and their isolation streamlined, by a molecular networking strategy. The structural elucidation was unambiguously accomplished from HRMS and 1D/2D NMR data. These compounds represent the first examples of corynanthean-type alkaloids tethered with a flavonoid. Epicatechocorynantheidine notably instigated two connections between the monoterpene indole alkaloid and the flavonoid, yielding an unprecedented octacyclic appendage. These flavoalkaloids exerted moderate antiplasmodial activities.
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Affiliation(s)
- Tapé Kouamé
- Université Paris-Saclay, CNRS, BioCIS, 92290 Châtenay-Malabry, France; (T.K.); (A.D.N.); (S.R.); (K.L.); (P.C.)
- Laboratoire de Chimie Organique et de Substances Naturelles (LCOSN), UFR Sciences des Structures de la Matière et Technologie, Univ. FHB, 22 BP 582 Abidjan 22, Côte d’Ivoire, France;
| | - Aboua Timothée Okpekon
- Laboratoire de Chimie Organique et de Substances Naturelles (LCOSN), UFR Sciences des Structures de la Matière et Technologie, Univ. FHB, 22 BP 582 Abidjan 22, Côte d’Ivoire, France;
| | - Nicaise F. Bony
- Département de Chimie Analytique, Minérale et Générale, Technologie Alimentaire, UFR Sciences Pharmaceutiques et Biologiques, Univ. FHB, 06 B. P. 2256 Abidjan 06, Côte d’Ivoire, France;
| | - Amon Diane N’Tamon
- Université Paris-Saclay, CNRS, BioCIS, 92290 Châtenay-Malabry, France; (T.K.); (A.D.N.); (S.R.); (K.L.); (P.C.)
- Département de Chimie Analytique, Minérale et Générale, Technologie Alimentaire, UFR Sciences Pharmaceutiques et Biologiques, Univ. FHB, 06 B. P. 2256 Abidjan 06, Côte d’Ivoire, France;
| | - Jean-François Gallard
- Institut de Chimie des Substances Naturelles, CNRS, ICSN UPR 2301, Université Paris-Saclay, 21 Avenue de la Terrasse, 91198 Gif-sur-Yvette, France;
| | - Somia Rharrabti
- Université Paris-Saclay, CNRS, BioCIS, 92290 Châtenay-Malabry, France; (T.K.); (A.D.N.); (S.R.); (K.L.); (P.C.)
| | - Karine Leblanc
- Université Paris-Saclay, CNRS, BioCIS, 92290 Châtenay-Malabry, France; (T.K.); (A.D.N.); (S.R.); (K.L.); (P.C.)
| | - Elisabeth Mouray
- Muséum National d′Histoire Naturelle, Unité Molécules de Communication et Adaptation des Micro-organismes, UMR7245, CP54, 57 Rue Cuvier, 75005 Paris, France; (E.M.); (P.G.)
| | - Philippe Grellier
- Muséum National d′Histoire Naturelle, Unité Molécules de Communication et Adaptation des Micro-organismes, UMR7245, CP54, 57 Rue Cuvier, 75005 Paris, France; (E.M.); (P.G.)
| | - Pierre Champy
- Université Paris-Saclay, CNRS, BioCIS, 92290 Châtenay-Malabry, France; (T.K.); (A.D.N.); (S.R.); (K.L.); (P.C.)
| | - Mehdi A. Beniddir
- Université Paris-Saclay, CNRS, BioCIS, 92290 Châtenay-Malabry, France; (T.K.); (A.D.N.); (S.R.); (K.L.); (P.C.)
| | - Pierre Le Pogam
- Université Paris-Saclay, CNRS, BioCIS, 92290 Châtenay-Malabry, France; (T.K.); (A.D.N.); (S.R.); (K.L.); (P.C.)
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17
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Alcover CF, Bernadat G, Kabran FA, Le Pogam P, Leblanc K, Fox Ramos AE, Gallard JF, Mouray E, Grellier P, Poupon E, Beniddir MA. Molecular Networking Reveals Serpentinine-Related Bisindole Alkaloids from Picralima nitida, a Previously Well-Investigated Species. J Nat Prod 2020; 83:1207-1216. [PMID: 32091210 DOI: 10.1021/acs.jnatprod.9b01247] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Five new monoterpene indole alkaloids (1-5), including four serpentinine-related bisindoles and one alstonine derivative monomer, have been isolated from the aerial parts of Picralima nitida. Their structures were elucidated by analysis of their HRMS and NMR spectroscopic data, and their absolute configurations were deduced from the comparison of experimental and simulated ECD spectra. In addition, two known compounds (6 and 7), previously undescribed from P. nitida, have also been purified. The compound isolation workflow was guided by a molecular networking-based dereplication strategy. Twenty-three compounds were dereplicated from the EtOH extract of P. nitida and fractions network and were assigned various levels of identification confidence. The antiparasitic activities against Plasmodium falciparum as well as the cytotoxic activity against the MRC-5 cell line were determined for compounds 1-7.
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Affiliation(s)
- Charlotte Fox Alcover
- Équipe "Pharmacognosie - Chimie des Substances Naturelles", Université Paris-Saclay, CNRS, BioCIS, 92290, Châtenay-Malabry, France
| | - Guillaume Bernadat
- Équipe "Pharmacognosie - Chimie des Substances Naturelles", Université Paris-Saclay, CNRS, BioCIS, 92290, Châtenay-Malabry, France
| | - Faustin A Kabran
- Laboratoire de Chimie Organique et Biologique, UFR SSMT, Université Félix Houphouët-Boigny, 22 BP 582 Abidjan 22, Côte d'Ivoire
| | - Pierre Le Pogam
- Équipe "Pharmacognosie - Chimie des Substances Naturelles", Université Paris-Saclay, CNRS, BioCIS, 92290, Châtenay-Malabry, France
| | - Karine Leblanc
- Équipe "Pharmacognosie - Chimie des Substances Naturelles", Université Paris-Saclay, CNRS, BioCIS, 92290, Châtenay-Malabry, France
| | - Alexander E Fox Ramos
- Équipe "Pharmacognosie - Chimie des Substances Naturelles", Université Paris-Saclay, CNRS, BioCIS, 92290, Châtenay-Malabry, France
| | - Jean-François Gallard
- Institut de Chimie des Substances Naturelles, CNRS, ICSN UPR 2301, Université Paris-Saclay, 21 Avenue de la Terrasse, 91198, Gif-sur-Yvette, France
| | - Elisabeth Mouray
- Unité Molécules de Communication et Adaptation des Microorganismes (MCAM, UMR 7245), Muséum National d'Histoire Naturelle, CNRS, Sorbonne Universités, CP52, 57 Rue Cuvier, 75005, Paris, France
| | - Philippe Grellier
- Unité Molécules de Communication et Adaptation des Microorganismes (MCAM, UMR 7245), Muséum National d'Histoire Naturelle, CNRS, Sorbonne Universités, CP52, 57 Rue Cuvier, 75005, Paris, France
| | - Erwan Poupon
- Équipe "Pharmacognosie - Chimie des Substances Naturelles", Université Paris-Saclay, CNRS, BioCIS, 92290, Châtenay-Malabry, France
| | - Mehdi A Beniddir
- Équipe "Pharmacognosie - Chimie des Substances Naturelles", Université Paris-Saclay, CNRS, BioCIS, 92290, Châtenay-Malabry, France
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Viswanathan S, Shi Y, Galipeau J, Krampera M, Leblanc K, Martin I, Nolta J, Phinney DG, Sensebe L. Mesenchymal stem versus stromal cells: International Society for Cell & Gene Therapy (ISCT®) Mesenchymal Stromal Cell committee position statement on nomenclature. Cytotherapy 2019; 21:1019-1024. [PMID: 31526643 DOI: 10.1016/j.jcyt.2019.08.002] [Citation(s) in RCA: 405] [Impact Index Per Article: 81.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Accepted: 08/19/2019] [Indexed: 02/06/2023]
Abstract
The International Society for Cell & Gene Therapy (ISCT®) Mesenchymal Stromal Cell (ISCT MSC) committee offers a position statement to clarify the nomenclature of mesenchymal stromal cells (MSCs). The ISCT MSC committee continues to support the use of the acronym "MSCs" but recommends this be (i) supplemented by tissue-source origin of the cells, which would highlight tissue-specific properties; (ii) intended as MSCs unless rigorous evidence for stemness exists that can be supported by both in vitro and in vivo data; and (iii) associated with robust matrix of functional assays to demonstrate MSC properties, which are not generically defined but informed by the intended therapeutic mode of actions.
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Affiliation(s)
- S Viswanathan
- Arthritis Program, University Health Network, Krembil Research Institute, University Health Network, Cell Therapy Program, University Health Network, Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Canada.
| | - Y Shi
- The First Affiliated Hospital, Soochow University Institutes for Translational Medicine, Suzhou, China; Institute of Health Sciences, Chinese Academy of Sciences, Shanghai, China.
| | - J Galipeau
- Department of Medicine, University of Wisconsin Carbone Cancer Center, Madison, Wisconsin, USA
| | - M Krampera
- Section of Hematology, Department of Medicine, University of Verona, Verona, Italy
| | - K Leblanc
- Division of Clinical Immunology and Transfusion Medicine, Karolinska Institutet, Stockholm, Sweden
| | - I Martin
- Department of Biomedicine, University Hospital Basel, Basel, Switzerland
| | - J Nolta
- Department of Internal Medicine, Stem Cell Program and Institute for Regenerative Cures, University of California Davis, Sacramento, California, USA
| | - D G Phinney
- Department of Molecular Therapeutics, The Scripps Research Institute, Jupiter, Florida, USA
| | - L Sensebe
- UMR5273 STROMALab CNRS/EFS/UPS-INSERM U1031, Toulouse, France
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Berrevoet F, Doerhoff C, Muysoms F, Hopson S, Muzi MG, Nienhuijs S, Kullman E, Tollens T, Schwartz M, Leblanc K, Velanovich V, Jørgensen LN. Open ventral hernia repair with a composite ventral patch - final results of a multicenter prospective study. BMC Surg 2019; 19:93. [PMID: 31311545 PMCID: PMC6633695 DOI: 10.1186/s12893-019-0555-z] [Citation(s) in RCA: 4] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Accepted: 07/03/2019] [Indexed: 01/08/2023] Open
Abstract
Background This study assessed clinical outcomes, including safety and recurrence, from the two-year follow-up of patients who underwent open ventral primary hernia repair with the use of the Parietex™ Composite Ventral Patch (PCO-VP). Methods A prospective single-arm, multicenter study of 126 patients undergoing open ventral hernia repair for umbilical and epigastric hernias with the PCO-VP was performed. Results One hundred twenty-six subjects (110 with umbilical hernia and 16 with epigastric hernia) with a mean hernia diameter of 1.8 cm (0.4–4.0) were treated with PCO-VP. One hundred subjects completed the two-year study. Cumulative hernia recurrence was 3.0% (3/101; 95%CI: 0.0–6.3%) within 24 months. Median Numeric Rating Scale pain scores improved from 2 [0–10] at baseline to 0 [0–3] at 1 month (P < 0.001) and remained low at 24 months 0 [0–6] (P < 0.001). 99% (102/103) of the patients were satisfied with their repair at 24 months postoperative. Conclusions The use of PCO-VP to repair primary umbilical and epigastric defects yielded a low recurrence rate, low postoperative and chronic pain, and high satisfaction ratings, confirming that PCO-VP is effective for small ventral hernia repair in the two-year term after implantation. Trial registration The study was registered publically at clinicaltrials.gov (NCT01848184 registered May 7, 2013).
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Affiliation(s)
- F Berrevoet
- Department of General and Hepatopancreatobiliary Surgery, Ghent University Hospital, Corneel Heymanslaan 10, 9000, Ghent, Belgium.
| | - C Doerhoff
- Surgicare of Missouri, Jefferson City, MO, USA
| | - F Muysoms
- Department of Surgery AZ Maria Middelares, Ghent, Belgium
| | - S Hopson
- Bon Secours Hernia Center, Mary Immaculate Hospital, Newport News, VA, USA
| | - M G Muzi
- University Hospital Tor Vergata, Rome, Italy
| | - S Nienhuijs
- Department of Surgery, Catharina Hospital, Eindhoven, Netherlands
| | - E Kullman
- HELSA Specialist Center, Linköping, Sweden
| | - T Tollens
- Imelda Hospital -General Surgery Imelda Hospital, Bonheiden, Belgium
| | - M Schwartz
- Monmouth Medical Center, Long Branch, NJ, USA
| | - K Leblanc
- Our Lady of Lakes Regional Medical Center, Baton Rouge, LA, USA
| | - V Velanovich
- Division of General Surgery, University of South Florida, Tampa General Hospital, Tampa, FL, USA
| | - L N Jørgensen
- Digestive Disease Center, Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark
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Colucci-Guyon E, Batista AS, Oliveira SDS, Blaud M, Bellettini IC, Marteyn BS, Leblanc K, Herbomel P, Duval R. Ultraspecific live imaging of the dynamics of zebrafish neutrophil granules by a histopermeable fluorogenic benzochalcone probe. Chem Sci 2019; 10:3654-3670. [PMID: 30996961 PMCID: PMC6432617 DOI: 10.1039/c8sc05593a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Accepted: 02/12/2019] [Indexed: 12/13/2022] Open
Abstract
Neutrophil granules (NGs) are key components of the innate immune response and mark the development of neutrophilic granulocytes in mammals. However, there has been no specific fluorescent vital stain up to now to monitor their dynamics within a whole live organism. We rationally designed a benzochalcone fluorescent probe (HAB) featuring high tissue permeability and optimal photophysics such as elevated quantum yield, pronounced solvatochromism and target-induced fluorogenesis. Phenotypic screening identified HAB as the first cell- and organelle-specific small-molecule fluorescent tracer of NGs in live zebrafish larvae, with no labeling of other cell types or organelles. HAB staining was independent of the state of neutrophil activation, labeling NGs of both resting and phagocytically active neutrophils with equal specificity. By high-resolution live imaging, we documented the dynamics of HAB-stained NGs during phagocytosis. Upon zymosan injection, labeled NGs were rapidly recruited to the forming phagosomes. Despite being a reversible ligand, HAB could not be displaced by high concentrations of pharmacologically relevant competing chalcones, indicating that this specific labeling was the result of the HAB's precise physicochemical signature rather than a general feature of chalcones. However, one of the competitors was discovered as a promising interstitial fluorescent tracer illuminating zebrafish histology, similarly to BODIPY-ceramide. As a yellow-emitting histopermeable vital stain, HAB functionally and spectrally complements most genetically incorporated fluorescent tags commonly used in live zebrafish biology, holding promise for the study of neutrophil-dependent responses relevant to human physiopathology such as developmental defects, inflammation and infection. Furthermore, HAB intensely labeled isolated live human neutrophils at the level of granulated subcellular structures consistent with human NGs, suggesting that the labeling of NGs by HAB is not restricted to the zebrafish model but also relevant to mammalian systems.
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Affiliation(s)
- Emma Colucci-Guyon
- Institut Pasteur , Unité Macrophages et Développement de l'Immunité , Paris , 75015 , France .
- CNRS , UMR 3738 , Paris , France
| | - Ariane S Batista
- Nanotechnology Engineering Program , Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia - COPPE , Universidade Federal do Rio de Janeiro , Rio de Janeiro , 21941-972 , Brazil
| | | | - Magali Blaud
- LCRB , CNRS , Université Paris 5 , Sorbonne Paris Cité , Paris , 75006 , France
| | - Ismael C Bellettini
- Departamento de Ciências Exatas e Educaçao , Universidade Federal de Santa Catarina , Blumenau , 89036-256 , Brazil
| | - Benoit S Marteyn
- Institut Pasteur , Unité de Pathogénie Microbienne Moléculaire , Paris , 75015 , France
- INSERM , UMR 786 , Paris , France
| | - Karine Leblanc
- BioCIS , CNRS , Université Paris-Sud 11 , Châtenay-Malabry , 92290 , France
| | - Philippe Herbomel
- Institut Pasteur , Unité Macrophages et Développement de l'Immunité , Paris , 75015 , France .
- CNRS , UMR 3738 , Paris , France
| | - Romain Duval
- MERIT , IRD , Université Paris 5 , Sorbonne Paris Cité , Paris , 75006 , France .
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21
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Bell A, Ezekowitz J, Tan M, Laflamme D, Goldin L, Leblanc K, Habert J, Lin P, Saunders K, Ngui D, Ng A, Desroches J, Goodman S. NON-VITAMIN K ANTAGONIST ORAL ANTICOAGULANT (NOAC) USE AND DOSING IN CANADIAN PRACTICE: INSIGHTS FROM THE OPTIMIZING PHARMACOTHERAPY IN THE MANAGEMENT APPROACH TO LOWERING RISK IN ATRIAL FIBRILLATION (OPTIMAL-AF) PROGRAM. Can J Cardiol 2018. [DOI: 10.1016/j.cjca.2018.07.125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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22
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Duchemin N, Skiredj A, Mansot J, Leblanc K, Vasseur J, Beniddir MA, Evanno L, Poupon E, Smietana M, Arseniyadis S. DNA‐Templated [2+2] Photocycloaddition: A Straightforward Entry into the Aplysinopsin Family of Natural Products. Angew Chem Int Ed Engl 2018; 57:11786-11791. [DOI: 10.1002/anie.201806357] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Indexed: 12/12/2022]
Affiliation(s)
- Nicolas Duchemin
- Queen Mary University of LondonSchool of Biological and Chemical Sciences Mile End Road London E1 4NS UK
| | - Adam Skiredj
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCISUniversité Paris-SudUniversité Paris-Saclay 5 rue Jean-Baptiste Clément 92296 Châtenay-Malabry France
| | - Justine Mansot
- Institut des Biomolécules Max MousseronCNRS, UMR 5247 Université de MontpellierENSCM Place Eugène Bataillon 34095 Montpellier France
| | - Karine Leblanc
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCISUniversité Paris-SudUniversité Paris-Saclay 5 rue Jean-Baptiste Clément 92296 Châtenay-Malabry France
| | - Jean‐Jacques Vasseur
- Institut des Biomolécules Max MousseronCNRS, UMR 5247 Université de MontpellierENSCM Place Eugène Bataillon 34095 Montpellier France
| | - Mehdi A. Beniddir
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCISUniversité Paris-SudUniversité Paris-Saclay 5 rue Jean-Baptiste Clément 92296 Châtenay-Malabry France
| | - Laurent Evanno
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCISUniversité Paris-SudUniversité Paris-Saclay 5 rue Jean-Baptiste Clément 92296 Châtenay-Malabry France
| | - Erwan Poupon
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCISUniversité Paris-SudUniversité Paris-Saclay 5 rue Jean-Baptiste Clément 92296 Châtenay-Malabry France
| | - Michael Smietana
- Institut des Biomolécules Max MousseronCNRS, UMR 5247 Université de MontpellierENSCM Place Eugène Bataillon 34095 Montpellier France
| | - Stellios Arseniyadis
- Queen Mary University of LondonSchool of Biological and Chemical Sciences Mile End Road London E1 4NS UK
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23
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Duchemin N, Skiredj A, Mansot J, Leblanc K, Vasseur JJ, Beniddir MA, Evanno L, Poupon E, Smietana M, Arseniyadis S. DNA-Templated [2+2] Photocycloaddition: A Straightforward Entry into the Aplysinopsin Family of Natural Products. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806357] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Nicolas Duchemin
- Queen Mary University of London; School of Biological and Chemical Sciences; Mile End Road London E1 4NS UK
| | - Adam Skiredj
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCIS; Université Paris-Sud; Université Paris-Saclay; 5 rue Jean-Baptiste Clément 92296 Châtenay-Malabry France
| | - Justine Mansot
- Institut des Biomolécules Max Mousseron; CNRS, UMR 5247 Université de Montpellier; ENSCM; Place Eugène Bataillon 34095 Montpellier France
| | - Karine Leblanc
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCIS; Université Paris-Sud; Université Paris-Saclay; 5 rue Jean-Baptiste Clément 92296 Châtenay-Malabry France
| | - Jean-Jacques Vasseur
- Institut des Biomolécules Max Mousseron; CNRS, UMR 5247 Université de Montpellier; ENSCM; Place Eugène Bataillon 34095 Montpellier France
| | - Mehdi A. Beniddir
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCIS; Université Paris-Sud; Université Paris-Saclay; 5 rue Jean-Baptiste Clément 92296 Châtenay-Malabry France
| | - Laurent Evanno
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCIS; Université Paris-Sud; Université Paris-Saclay; 5 rue Jean-Baptiste Clément 92296 Châtenay-Malabry France
| | - Erwan Poupon
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCIS; Université Paris-Sud; Université Paris-Saclay; 5 rue Jean-Baptiste Clément 92296 Châtenay-Malabry France
| | - Michael Smietana
- Institut des Biomolécules Max Mousseron; CNRS, UMR 5247 Université de Montpellier; ENSCM; Place Eugène Bataillon 34095 Montpellier France
| | - Stellios Arseniyadis
- Queen Mary University of London; School of Biological and Chemical Sciences; Mile End Road London E1 4NS UK
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24
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Evanno L, Lachkar D, Lamali A, Boufridi A, Séon-Méniel B, Tintillier F, Saulnier D, Denis S, Genta-Jouve G, Jullian JC, Leblanc K, Beniddir MA, Petek S, Debitus C, Poupon E. Cover Feature: A Ring-Distortion Strategy from Marine Natural Product Ilimaquinone Leads to Quorum Sensing Modulators (Eur. J. Org. Chem. 20-21/2018). European J Org Chem 2018. [DOI: 10.1002/ejoc.201800740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Laurent Evanno
- BioCIS; Université Paris-Sud; Université Paris-Saclay; 92290 Châtenay-Malabry France
| | - David Lachkar
- BioCIS; Université Paris-Sud; Université Paris-Saclay; 92290 Châtenay-Malabry France
| | - Assia Lamali
- BioCIS; Université Paris-Sud; Université Paris-Saclay; 92290 Châtenay-Malabry France
| | - Asmaa Boufridi
- BioCIS; Université Paris-Sud; Université Paris-Saclay; 92290 Châtenay-Malabry France
| | - Blandine Séon-Méniel
- BioCIS; Université Paris-Sud; Université Paris-Saclay; 92290 Châtenay-Malabry France
| | - Florent Tintillier
- EIO; UPF-IRD-Ifremer; Institut Louis Malardé; BP529 98713 Papeete Tahiti Polynésie française
| | - Denis Saulnier
- EIO; IRD-UPF-Ifremer; Institut Louis Malardé; BP 49 98719 Taravao Tahiti Polynésie française
| | - Stéphanie Denis
- BioCIS; Université Paris-Sud; Université Paris-Saclay; 92290 Châtenay-Malabry France
| | - Grégory Genta-Jouve
- Dr Grégory Genta-Jouve; Laboratoire de Chimie-Toxicologie Analytique et Cellulaire (C-TAC); Université Paris Descartes; 4 Avenue de l'observatoire 75006 Paris France
| | | | - Karine Leblanc
- BioCIS; Université Paris-Sud; Université Paris-Saclay; 92290 Châtenay-Malabry France
| | - Mehdi A. Beniddir
- BioCIS; Université Paris-Sud; Université Paris-Saclay; 92290 Châtenay-Malabry France
| | - Sylvain Petek
- LEMAR; IRD-UBO-CNRS-IFREMER; IUEM; rue Dumont d'Urville 29280 Plouzané France
| | - Cécile Debitus
- LEMAR; IRD-UBO-CNRS-IFREMER; IUEM; rue Dumont d'Urville 29280 Plouzané France
| | - Erwan Poupon
- BioCIS; Université Paris-Sud; Université Paris-Saclay; 92290 Châtenay-Malabry France
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Beeckman D, Van den Bussche K, Alves P, Arnold Long M, Beele H, Ciprandi G, Coyer F, de Groot T, De Meyer D, Deschepper E, Dunk A, Fourie A, García-Molina P, Gray M, Iblasi A, Jelnes R, Johansen E, Karadağ A, Leblanc K, Kis Dadara Z, Meaume S, Pokorna A, Romanelli M, Ruppert S, Schoonhoven L, Smet S, Smith C, Steininger A, Stockmayr M, Van Damme N, Voegeli D, Van Hecke A, Verhaeghe S, Woo K, Kottner J. Towards an international language for incontinence-associated dermatitis (IAD): design and evaluation of psychometric properties of the Ghent Global IAD Categorization Tool (GLOBIAD) in 30 countries. Br J Dermatol 2018. [DOI: 10.1111/bjd.16754] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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26
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Beeckman D, Van den Bussche K, Alves P, Arnold Long M, Beelev H, Ciprandi G, Coyer F, de Groot T, De Meyer D, Deschepper E, Dunk A, Fourie A, García-Molina P, Gray M, Iblasi A, Jelnes R, Johansen E, Karadag A, Leblanc K, Kis Dadara Z, Meaume S, Pokorna A, Romanelli M, Ruppert S, Schoonhoven L, Smet S, Smith C, Steininger A, Stockmayr M, Van Damme N, Voegeli D, Van Hecke A, Verhaeghe S, Woo K, Kottner J. 建立失禁相关性皮炎(IAD)相关国际通用术语:在30个国家/地区进行根特全球(IAD)分类工具(GLOBIAD)心理测量特性的设计和评估. Br J Dermatol 2018. [DOI: 10.1111/bjd.16766] [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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27
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Beeckman D, Van den Bussche K, Alves P, Arnold Long MC, Beele H, Ciprandi G, Coyer F, de Groot T, De Meyer D, Deschepper E, Dunk AM, Fourie A, García-Molina P, Gray M, Iblasi A, Jelnes R, Johansen E, Karadağ A, Leblanc K, Kis Dadara Z, Meaume S, Pokorna A, Romanelli M, Ruppert S, Schoonhoven L, Smet S, Smith C, Steininger A, Stockmayr M, Van Damme N, Voegeli D, Van Hecke A, Verhaeghe S, Woo K, Kottner J. Towards an international language for incontinence-associated dermatitis (IAD): design and evaluation of psychometric properties of the Ghent Global IAD Categorization Tool (GLOBIAD) in 30 countries. Br J Dermatol 2018; 178:1331-1340. [PMID: 29315488 DOI: 10.1111/bjd.16327] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/01/2018] [Indexed: 11/27/2022]
Abstract
BACKGROUND Incontinence-associated dermatitis (IAD) is a specific type of irritant contact dermatitis with different severity levels. An internationally accepted instrument to assess the severity of IAD in adults, with established diagnostic accuracy, agreement and reliability, is needed to support clinical practice and research. OBJECTIVES To design the Ghent Global IAD Categorization Tool (GLOBIAD) and evaluate its psychometric properties. METHODS The design was based on expert consultation using a three-round Delphi procedure with 34 experts from 13 countries. The instrument was tested using IAD photographs, which reflected different severity levels, in a sample of 823 healthcare professionals from 30 countries. Measures for diagnostic accuracy (sensitivity and specificity), agreement, interrater reliability (multirater Fleiss kappa) and intrarater reliability (Cohen's kappa) were assessed. RESULTS The GLOBIAD consists of two categories based on the presence of persistent redness (category 1) and skin loss (category 2), both of which are subdivided based on the presence of clinical signs of infection. The agreement for differentiating between category 1 and category 2 was 0·86 [95% confidence interval (CI) 0·86-0·87], with a sensitivity of 90% and a specificity of 84%. The overall agreement was 0·55 (95% CI 0·55-0·56). The Fleiss kappa for differentiating between category 1 and category 2 was 0·65 (95% CI 0·65-0·65). The overall Fleiss kappa was 0·41 (95% CI 0·41-0·41). The Cohen's kappa for differentiating between category 1 and category 2 was 0·76 (95% CI 0·75-0·77). The overall Cohen's kappa was 0·61 (95% CI 0·59-0·62). CONCLUSIONS The development of the GLOBIAD is a major step towards a better systematic assessment of IAD in clinical practice and research worldwide. However, further validation is needed.
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Affiliation(s)
- D Beeckman
- University Centre for Nursing and Midwifery, Department of Public Health, Ghent University, Ghent, Belgium.,School of Nursing and Midwifery, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - K Van den Bussche
- University Centre for Nursing and Midwifery, Department of Public Health, Ghent University, Ghent, Belgium
| | - P Alves
- Centre for Interdisciplinary Research in Health, Institute of Health Sciences, Catholic University of Portugal, Oporto, Portugal
| | - M C Arnold Long
- Department of Nursing, Roper Hospital, Charleston, SC, U.S.A
| | - H Beele
- Department of Dermatology, Ghent University Hospital, Ghent, Belgium
| | - G Ciprandi
- Department of Pediatric Surgery, Division of Plastic and Maxillofacial Surgery, Bambino Gesu' Children's Hospital, Research Institute, Rome, Italy
| | - F Coyer
- Intensive Care Services, Royal Brisbane and Women's Hospital and School of Nursing, Queensland University of Technology, Brisbane, Australia
| | - T de Groot
- Wond Expertise Centrum, Lange Land Ziekenhuis, Zoetermeer, the Netherlands
| | - D De Meyer
- University Centre for Nursing and Midwifery, Department of Public Health, Ghent University, Ghent, Belgium
| | - E Deschepper
- University Centre for Nursing and Midwifery, Department of Public Health, Ghent University, Ghent, Belgium
| | - A M Dunk
- Tissue Viability Unit, Canberra Hospital, ACT Health, Canberra, Australia
| | - A Fourie
- Scientific Affairs & Education Manager, 3M (Critical and Chronic Care Solutions), Johannesburg, South Africa
| | - P García-Molina
- Department of Nursing, University of Valencia, Valencia, Spain
| | - M Gray
- Department of Urology, University of Virginia, Charlottesville, VA, U.S.A
| | - A Iblasi
- Wound Care, King Saud Medical City (KSMC), Riyadh, Saudi Arabia
| | - R Jelnes
- Wound Clinic, Sygehus Sonderjylland, Sonderborg, Denmark
| | - E Johansen
- University College of Southeast Norway, Department of Nursing and Health Sciences, Faculty of Health and Social Sciences, Drammen, Norway
| | - A Karadağ
- School of Nursing, Koc University, Istanbul, Turkey
| | - K Leblanc
- School of Nursing, Faculty of Health Sciences, Queen's University, Kingston, Canada
| | - Z Kis Dadara
- Development of Care, Barmherzige Brüder Austria, Vienna, Austria
| | - S Meaume
- Geriatric and Wound Healing Department, APHP, Hôpital Rothschild, Paris, France
| | - A Pokorna
- Department of Nursing, Masaryk University, Faculty of Medicine, Brno, Czech Republic
| | - M Romanelli
- Department of Dermatology, University of Pisa, Pisa, Italy
| | - S Ruppert
- Department of Medicine II, Vienna General Hospital, Vienna, Austria
| | - L Schoonhoven
- Faculty of Health Sciences, University of Southampton, Southampton, U.K.,National Institute for Health Research Collaboration for Leadership in Applied Health Research and Care (NIHR CLAHRC Wessex), University of Southampton, Southampton, U.K.,Radboud University Medical Center, Radboud Institute for Health Sciences, Scientific Institute for Quality of Healthcare, Nijmegen, the Netherlands
| | - S Smet
- Wound Care Center, Ghent University Hospital, Ghent, Belgium
| | - C Smith
- Wound Ostomy Clinic, Marion General Hospital, Marion, IN, U.S.A
| | - A Steininger
- Private Universität für Medizinische Informatik und Technik (UMIT) und Pflegeakademie der Barmherzigen Brüder Wien Pflegewissenschaft und Gerontologie, Vienna, Austria
| | - M Stockmayr
- Department of Surgery, Vienna General Hospital, Vienna, Austria
| | - N Van Damme
- University Centre for Nursing and Midwifery, Department of Public Health, Ghent University, Ghent, Belgium
| | - D Voegeli
- Faculty of Health Sciences, University of Southampton, Southampton, U.K
| | - A Van Hecke
- University Centre for Nursing and Midwifery, Department of Public Health, Ghent University, Ghent, Belgium
| | - S Verhaeghe
- University Centre for Nursing and Midwifery, Department of Public Health, Ghent University, Ghent, Belgium
| | - K Woo
- Department of Nursing, Queen's University, Kingston, Canada
| | - J Kottner
- University Centre for Nursing and Midwifery, Department of Public Health, Ghent University, Ghent, Belgium.,Clinical Research Center for Hair and Skin Science, Department of Dermatology and Allergy, Charité-Universtitätsmedizin Berlin, Berlin, Germany
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Evanno L, Lachkar D, Lamali A, Boufridi A, Séon-Méniel B, Tintillier F, Saulnier D, Denis S, Genta-Jouve G, Jullian JC, Leblanc K, Beniddir MA, Petek S, Debitus C, Poupon E. A Ring-Distortion Strategy from Marine Natural Product Ilimaquinone Leads to Quorum Sensing Modulators. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800047] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Laurent Evanno
- BioCIS; Université Paris-Sud; Université Paris-Saclay; 92290 Châtenay-Malabry France
| | - David Lachkar
- BioCIS; Université Paris-Sud; Université Paris-Saclay; 92290 Châtenay-Malabry France
| | - Assia Lamali
- BioCIS; Université Paris-Sud; Université Paris-Saclay; 92290 Châtenay-Malabry France
| | - Asmaa Boufridi
- BioCIS; Université Paris-Sud; Université Paris-Saclay; 92290 Châtenay-Malabry France
| | - Blandine Séon-Méniel
- BioCIS; Université Paris-Sud; Université Paris-Saclay; 92290 Châtenay-Malabry France
| | - Florent Tintillier
- EIO; UPF-IRD-Ifremer; Institut Louis Malardé; BP529 98713 Papeete Tahiti Polynésie française
| | - Denis Saulnier
- EIO; IRD-UPF-Ifremer; Institut Louis Malardé; BP 49 98719 Taravao Tahiti Polynésie française
| | - Stéphanie Denis
- BioCIS; Université Paris-Sud; Université Paris-Saclay; 92290 Châtenay-Malabry France
| | - Grégory Genta-Jouve
- Dr Grégory Genta-Jouve; Laboratoire de Chimie-Toxicologie Analytique et Cellulaire (C-TAC); Université Paris Descartes; 4 Avenue de l'observatoire 75006 Paris France
| | | | - Karine Leblanc
- BioCIS; Université Paris-Sud; Université Paris-Saclay; 92290 Châtenay-Malabry France
| | - Mehdi A. Beniddir
- BioCIS; Université Paris-Sud; Université Paris-Saclay; 92290 Châtenay-Malabry France
| | - Sylvain Petek
- LEMAR; IRD-UBO-CNRS-IFREMER; IUEM; rue Dumont d'Urville 29280 Plouzané France
| | - Cécile Debitus
- LEMAR; IRD-UBO-CNRS-IFREMER; IUEM; rue Dumont d'Urville 29280 Plouzané France
| | - Erwan Poupon
- BioCIS; Université Paris-Sud; Université Paris-Saclay; 92290 Châtenay-Malabry France
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Garrigue B, Dehu Y, Girault F, Figadère B, Leblanc K, Briole N, Capitani GA, Lagadec S, Laborne FX. Preparing Drugs for Infusion Via Syringe Pump: A Key Step to Ensure Homogeneous Concentration. Crit Care Nurse 2018; 36:36-44. [PMID: 27481800 DOI: 10.4037/ccn2016756] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
OBJECTIVE Preparation of drug solutions used with electronic syringe infusion pumps plays a crucial role in the delivery of an accurate drug concentration. Is there a correlation between drug concentrations during syringe pump infusion and preparation protocols? METHOD Norepinephrine, insulin, and sufentanil were prepared in 3 different ways: (1) the drug was taken from the vial, then the solvent was added followed by an air bubble, and mixing was performed by turning the syringe top-to-bottom in a 180° shaking movement 5 consecutive times; (2) the drug was taken from the vial, then the solvent was added and not mixed; and (3) the solvent was taken from a stock solution, then the drug was added and not mixed. Concentrations of drugs were determined at different times during administration by reverse-phase high-performance liquid chromatography with ultraviolet detection. All analyses were performed in triplicate and were based on measurement of peak areas. RESULTS With no shaking of the syringe, the concentration of the injected drugs varies widely. In any case, mixing of the syringe contents by turning the syringe in a top-to-bottom 180° shaking movement 5 times with an air bubble would ensure administration of the drug at a constant concentration. CONCLUSIONS Without mixing, the concentrations of all drug solutions varied widely when administered via an electronic syringe infusion pump. Mixing syringe contents should be made part of the compulsory curriculum for administering medications at all levels of medical education. (Critical Care Nurse. 2016;36[4]:36-45).
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Affiliation(s)
- Bruno Garrigue
- Bruno Garrigue is an anesthesia nurse and head of the prehospital emergency medicine service at Centre Hospitalier Sud-Francilien, Corbeil-Essonnes, France.Yann Dehu is an anesthesia nurse working in a surgical unit and a clinical research associate at Centre Hospitalier Sud-Francilien.Fabrice Girault is a registered nurse working in a prehospital emergency medicine service, Centre Hospitalier Sud-Francilien.Bruno Figadère is a medicinal chemist at Centre Nationale de Recherches Scientifiques (CNRS)/Universite Paris Sud-Faculte de Pharmacie Joint Laboratory, Chatenay-Malabry, France.Karine Leblanc is a chemical engineer at CNRS/Univ Paris Sud-Faculte de Pharmacie Joint Laboratory.Nicolas Briole is an emergency medicine physician at Centre Hospitalier Sud-Francilien.Georges Antoine Capitani is head of the acute care department at Centre Hospitalier Sud-Francilien.Steven Lagadec is a nurse in the prehospital emergency service and a clinical research associate at Centre Hospitalier Sud-Francilien.François-Xavier Laborne is a prehospital emergency practitioner and a methodologist and biostatistician in the clinical research unit of the Centre Hospitalier Sud-Francilien.
| | - Yann Dehu
- Bruno Garrigue is an anesthesia nurse and head of the prehospital emergency medicine service at Centre Hospitalier Sud-Francilien, Corbeil-Essonnes, France.Yann Dehu is an anesthesia nurse working in a surgical unit and a clinical research associate at Centre Hospitalier Sud-Francilien.Fabrice Girault is a registered nurse working in a prehospital emergency medicine service, Centre Hospitalier Sud-Francilien.Bruno Figadère is a medicinal chemist at Centre Nationale de Recherches Scientifiques (CNRS)/Universite Paris Sud-Faculte de Pharmacie Joint Laboratory, Chatenay-Malabry, France.Karine Leblanc is a chemical engineer at CNRS/Univ Paris Sud-Faculte de Pharmacie Joint Laboratory.Nicolas Briole is an emergency medicine physician at Centre Hospitalier Sud-Francilien.Georges Antoine Capitani is head of the acute care department at Centre Hospitalier Sud-Francilien.Steven Lagadec is a nurse in the prehospital emergency service and a clinical research associate at Centre Hospitalier Sud-Francilien.François-Xavier Laborne is a prehospital emergency practitioner and a methodologist and biostatistician in the clinical research unit of the Centre Hospitalier Sud-Francilien
| | - Fabrice Girault
- Bruno Garrigue is an anesthesia nurse and head of the prehospital emergency medicine service at Centre Hospitalier Sud-Francilien, Corbeil-Essonnes, France.Yann Dehu is an anesthesia nurse working in a surgical unit and a clinical research associate at Centre Hospitalier Sud-Francilien.Fabrice Girault is a registered nurse working in a prehospital emergency medicine service, Centre Hospitalier Sud-Francilien.Bruno Figadère is a medicinal chemist at Centre Nationale de Recherches Scientifiques (CNRS)/Universite Paris Sud-Faculte de Pharmacie Joint Laboratory, Chatenay-Malabry, France.Karine Leblanc is a chemical engineer at CNRS/Univ Paris Sud-Faculte de Pharmacie Joint Laboratory.Nicolas Briole is an emergency medicine physician at Centre Hospitalier Sud-Francilien.Georges Antoine Capitani is head of the acute care department at Centre Hospitalier Sud-Francilien.Steven Lagadec is a nurse in the prehospital emergency service and a clinical research associate at Centre Hospitalier Sud-Francilien.François-Xavier Laborne is a prehospital emergency practitioner and a methodologist and biostatistician in the clinical research unit of the Centre Hospitalier Sud-Francilien
| | - Bruno Figadère
- Bruno Garrigue is an anesthesia nurse and head of the prehospital emergency medicine service at Centre Hospitalier Sud-Francilien, Corbeil-Essonnes, France.Yann Dehu is an anesthesia nurse working in a surgical unit and a clinical research associate at Centre Hospitalier Sud-Francilien.Fabrice Girault is a registered nurse working in a prehospital emergency medicine service, Centre Hospitalier Sud-Francilien.Bruno Figadère is a medicinal chemist at Centre Nationale de Recherches Scientifiques (CNRS)/Universite Paris Sud-Faculte de Pharmacie Joint Laboratory, Chatenay-Malabry, France.Karine Leblanc is a chemical engineer at CNRS/Univ Paris Sud-Faculte de Pharmacie Joint Laboratory.Nicolas Briole is an emergency medicine physician at Centre Hospitalier Sud-Francilien.Georges Antoine Capitani is head of the acute care department at Centre Hospitalier Sud-Francilien.Steven Lagadec is a nurse in the prehospital emergency service and a clinical research associate at Centre Hospitalier Sud-Francilien.François-Xavier Laborne is a prehospital emergency practitioner and a methodologist and biostatistician in the clinical research unit of the Centre Hospitalier Sud-Francilien
| | - Karine Leblanc
- Bruno Garrigue is an anesthesia nurse and head of the prehospital emergency medicine service at Centre Hospitalier Sud-Francilien, Corbeil-Essonnes, France.Yann Dehu is an anesthesia nurse working in a surgical unit and a clinical research associate at Centre Hospitalier Sud-Francilien.Fabrice Girault is a registered nurse working in a prehospital emergency medicine service, Centre Hospitalier Sud-Francilien.Bruno Figadère is a medicinal chemist at Centre Nationale de Recherches Scientifiques (CNRS)/Universite Paris Sud-Faculte de Pharmacie Joint Laboratory, Chatenay-Malabry, France.Karine Leblanc is a chemical engineer at CNRS/Univ Paris Sud-Faculte de Pharmacie Joint Laboratory.Nicolas Briole is an emergency medicine physician at Centre Hospitalier Sud-Francilien.Georges Antoine Capitani is head of the acute care department at Centre Hospitalier Sud-Francilien.Steven Lagadec is a nurse in the prehospital emergency service and a clinical research associate at Centre Hospitalier Sud-Francilien.François-Xavier Laborne is a prehospital emergency practitioner and a methodologist and biostatistician in the clinical research unit of the Centre Hospitalier Sud-Francilien
| | - Nicolas Briole
- Bruno Garrigue is an anesthesia nurse and head of the prehospital emergency medicine service at Centre Hospitalier Sud-Francilien, Corbeil-Essonnes, France.Yann Dehu is an anesthesia nurse working in a surgical unit and a clinical research associate at Centre Hospitalier Sud-Francilien.Fabrice Girault is a registered nurse working in a prehospital emergency medicine service, Centre Hospitalier Sud-Francilien.Bruno Figadère is a medicinal chemist at Centre Nationale de Recherches Scientifiques (CNRS)/Universite Paris Sud-Faculte de Pharmacie Joint Laboratory, Chatenay-Malabry, France.Karine Leblanc is a chemical engineer at CNRS/Univ Paris Sud-Faculte de Pharmacie Joint Laboratory.Nicolas Briole is an emergency medicine physician at Centre Hospitalier Sud-Francilien.Georges Antoine Capitani is head of the acute care department at Centre Hospitalier Sud-Francilien.Steven Lagadec is a nurse in the prehospital emergency service and a clinical research associate at Centre Hospitalier Sud-Francilien.François-Xavier Laborne is a prehospital emergency practitioner and a methodologist and biostatistician in the clinical research unit of the Centre Hospitalier Sud-Francilien
| | - Georges Antoine Capitani
- Bruno Garrigue is an anesthesia nurse and head of the prehospital emergency medicine service at Centre Hospitalier Sud-Francilien, Corbeil-Essonnes, France.Yann Dehu is an anesthesia nurse working in a surgical unit and a clinical research associate at Centre Hospitalier Sud-Francilien.Fabrice Girault is a registered nurse working in a prehospital emergency medicine service, Centre Hospitalier Sud-Francilien.Bruno Figadère is a medicinal chemist at Centre Nationale de Recherches Scientifiques (CNRS)/Universite Paris Sud-Faculte de Pharmacie Joint Laboratory, Chatenay-Malabry, France.Karine Leblanc is a chemical engineer at CNRS/Univ Paris Sud-Faculte de Pharmacie Joint Laboratory.Nicolas Briole is an emergency medicine physician at Centre Hospitalier Sud-Francilien.Georges Antoine Capitani is head of the acute care department at Centre Hospitalier Sud-Francilien.Steven Lagadec is a nurse in the prehospital emergency service and a clinical research associate at Centre Hospitalier Sud-Francilien.François-Xavier Laborne is a prehospital emergency practitioner and a methodologist and biostatistician in the clinical research unit of the Centre Hospitalier Sud-Francilien
| | - Steven Lagadec
- Bruno Garrigue is an anesthesia nurse and head of the prehospital emergency medicine service at Centre Hospitalier Sud-Francilien, Corbeil-Essonnes, France.Yann Dehu is an anesthesia nurse working in a surgical unit and a clinical research associate at Centre Hospitalier Sud-Francilien.Fabrice Girault is a registered nurse working in a prehospital emergency medicine service, Centre Hospitalier Sud-Francilien.Bruno Figadère is a medicinal chemist at Centre Nationale de Recherches Scientifiques (CNRS)/Universite Paris Sud-Faculte de Pharmacie Joint Laboratory, Chatenay-Malabry, France.Karine Leblanc is a chemical engineer at CNRS/Univ Paris Sud-Faculte de Pharmacie Joint Laboratory.Nicolas Briole is an emergency medicine physician at Centre Hospitalier Sud-Francilien.Georges Antoine Capitani is head of the acute care department at Centre Hospitalier Sud-Francilien.Steven Lagadec is a nurse in the prehospital emergency service and a clinical research associate at Centre Hospitalier Sud-Francilien.François-Xavier Laborne is a prehospital emergency practitioner and a methodologist and biostatistician in the clinical research unit of the Centre Hospitalier Sud-Francilien
| | - François-Xavier Laborne
- Bruno Garrigue is an anesthesia nurse and head of the prehospital emergency medicine service at Centre Hospitalier Sud-Francilien, Corbeil-Essonnes, France.Yann Dehu is an anesthesia nurse working in a surgical unit and a clinical research associate at Centre Hospitalier Sud-Francilien.Fabrice Girault is a registered nurse working in a prehospital emergency medicine service, Centre Hospitalier Sud-Francilien.Bruno Figadère is a medicinal chemist at Centre Nationale de Recherches Scientifiques (CNRS)/Universite Paris Sud-Faculte de Pharmacie Joint Laboratory, Chatenay-Malabry, France.Karine Leblanc is a chemical engineer at CNRS/Univ Paris Sud-Faculte de Pharmacie Joint Laboratory.Nicolas Briole is an emergency medicine physician at Centre Hospitalier Sud-Francilien.Georges Antoine Capitani is head of the acute care department at Centre Hospitalier Sud-Francilien.Steven Lagadec is a nurse in the prehospital emergency service and a clinical research associate at Centre Hospitalier Sud-Francilien.François-Xavier Laborne is a prehospital emergency practitioner and a methodologist and biostatistician in the clinical research unit of the Centre Hospitalier Sud-Francilien
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Leblanc K, Jaffer A, Papastergiou J, Semchuk B. NOVEL TECHNOLOGY-ENABLED PHARMACIST AND PATIENT EDUCATION PROGRAM ENHANCES ADHERENCE TO STROKE PREVENTION MEDICATIONS. Can J Cardiol 2017. [DOI: 10.1016/j.cjca.2017.07.046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Lasbleiz M, Leblanc K, Armand LK, Christaki U, Georges C, Obernosterer I, Quéguiner B. Composition of diatom communities and their contribution to plankton biomass in the naturally iron-fertilized region of Kerguelen in the Southern Ocean. FEMS Microbiol Ecol 2016; 92:fiw171. [PMID: 27515734 DOI: 10.1093/femsec/fiw171] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/05/2016] [Indexed: 12/25/2022] Open
Abstract
In the naturally iron-fertilized surface waters of the northern Kerguelen Plateau region, the early spring diatom community composition and contribution to plankton carbon biomass were investigated and compared with the high nutrient, low chlorophyll (HNLC) surrounding waters. The large iron-induced blooms were dominated by small diatom species belonging to the genera Chaetoceros (Hyalochaete) and Thalassiosira, which rapidly responded to the onset of favorable light-conditions in the meander of the Polar Front. In comparison, the iron-limited HNLC area was typically characterized by autotrophic nanoeukaryote-dominated communities and by larger and more heavily silicified diatom species (e.g. Fragilariopsis spp.). Our results support the hypothesis that diatoms are valuable vectors of carbon export to depth in naturally iron-fertilized systems of the Southern Ocean. Furthermore, our results corroborate observations of the exported diatom assemblage from a sediment trap deployed in the iron-fertilized area, whereby the dominant Chaetoceros (Hyalochaete) cells were less efficiently exported than the less abundant, yet heavily silicified, cells of Thalassionema nitzschioides and Fragilariopsis kerguelensis Our observations emphasize the strong influence of species-specific diatom cell properties combined with trophic interactions on matter export efficiency, and illustrate the tight link between the specific composition of phytoplankton communities and the biogeochemical properties characterizing the study area.
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Affiliation(s)
- Marine Lasbleiz
- Aix-Marseille Université, Université de Toulon, CNRS/INSU, IRD, MIO, UM 110, 13288, Marseille, Cedex 09, France
| | - Karine Leblanc
- Aix-Marseille Université, Université de Toulon, CNRS/INSU, IRD, MIO, UM 110, 13288, Marseille, Cedex 09, France
| | - Leanne K Armand
- Department of Biological Sciences, Macquarie University, North Ryde, New South Wales, 2109, Australia
| | - Urania Christaki
- INSU-CNRS, UMR8187 LOG, Laboratoire d'Océanologie et des Géosciences, Université du Littoral Côte d'Opale, ULCO, 32 avenue Foch, 62930 Wimereux, France
| | - Clément Georges
- INSU-CNRS, UMR8187 LOG, Laboratoire d'Océanologie et des Géosciences, Université du Littoral Côte d'Opale, ULCO, 32 avenue Foch, 62930 Wimereux, France
| | - Ingrid Obernosterer
- CNRS, Sorbonne Universités, UPMC Univ Paris 06, Laboratoire d'Océanographie Microbienne (LOMIC), Observatoire Océanologique, F-66650 Banyuls/mer, France
| | - Bernard Quéguiner
- Aix-Marseille Université, Université de Toulon, CNRS/INSU, IRD, MIO, UM 110, 13288, Marseille, Cedex 09, France
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Leblanc K, Bhatia R, Dorian P, Ivers N, Valentinis A, Beard-Ashley L, Grinman M, Morra D, Ha A, Meshkat N. TRANSITIONING EMERGENCY ATRIAL FIBRILLATION MANAGEMENT (TEAM) MODEL IMPROVES QUALITY OF LIFE AND HELPS PATIENTS AVOID ED VISITS. Can J Cardiol 2015. [DOI: 10.1016/j.cjca.2015.07.512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Alexander T, Bondanza A, Muraro PA, Greco R, Saccardi R, Daikeler T, Kazmi M, Hawkey C, Simoes BP, Leblanc K, Fibbe WE, Moore J, Snarski E, Martin T, Hiepe F, Velardi A, Toubert A, Snowden JA, Farge D. SCT for severe autoimmune diseases: consensus guidelines of the European Society for Blood and Marrow Transplantation for immune monitoring and biobanking. Bone Marrow Transplant 2014; 50:173-80. [PMID: 25387090 PMCID: PMC4317973 DOI: 10.1038/bmt.2014.251] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Accepted: 09/01/2014] [Indexed: 12/19/2022]
Abstract
Over the past 15 years, SCT has emerged as a promising treatment option for patients with severe autoimmune diseases (ADs). Mechanistic studies recently provided the proof-of-concept that restoration of immunological tolerance can be achieved by haematopoietic SCT in chronic autoimmunity through eradication of the pathologic, immunologic memory and profound reconfiguration of the immune system, that is, immune ‘resetting'. Nevertheless, a number of areas remain unresolved and warrant further investigation to refine our understanding of the underlying mechanisms of action and to optimize clinical SCT protocols. Due to the low number of patients transplanted in each centre, it is essential to adequately collect and analyse biological samples in a larger cohort of patients under standardized conditions. The European society for blood and marrow transplantation Autoimmune Diseases and Immunobiology Working Parties have, therefore, undertaken a joint initiative to develop and implement guidelines for ‘good laboratory practice' in relation to procurement, processing, storage and analysis of biological specimens for immune reconstitution studies in AD patients before, during and after SCT. The aim of this document is to provide practical recommendations for biobanking of samples and laboratory immune monitoring in patients with ADs undergoing SCT, both for routine supportive care purposes and investigational studies.
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Affiliation(s)
- T Alexander
- Department of Rheumatology and Clinical Immunology, Charité-University Medicine Berlin, Berlin, Germany
| | - A Bondanza
- Hematology and Bone Marrow Transplantation Unit, San Raffaele Scientific Institute, Milano, Italy
| | - P A Muraro
- Division of Brain Sciences, Department of Medicine, Imperial College London, London, UK
| | - R Greco
- Hematology and Bone Marrow Transplantation Unit, San Raffaele Scientific Institute, Milano, Italy
| | - R Saccardi
- Cord Blood Bank, Haematology department, Careggi University Hospital, Florence, Italy
| | - T Daikeler
- Department of Rheumatology, University Hospital Basel, Basel, Switzerland
| | - M Kazmi
- Department of Haematology, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - C Hawkey
- Nottingham Digestive Diseases Centre, Nottingham, UK
| | - B P Simoes
- Department of Clinical Medicine, School of Medicine, University of Sao Paulo, Ribeirao Preto, Brazil
| | - K Leblanc
- Department of Hematology, Karolinska University Hospital, Stockholm, Sweden
| | - W E Fibbe
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Centre, Leiden, The Netherlands
| | - J Moore
- Department of Haematology, St Vincent's Hospital, Darlinghurst, Sydney, Australia
| | - E Snarski
- Department of Hematology, Oncology and Internal Diseases, Medical University of Warsaw, Warsaw, Poland
| | - T Martin
- Strasbourg University Hospital, Strasbourg, France
| | - F Hiepe
- Department of Rheumatology and Clinical Immunology, Charité-University Medicine Berlin, Berlin, Germany
| | - A Velardi
- Department of Medicine, Division of Haematology, University of Perugia, Perugia, Italy
| | - A Toubert
- Inserm U1160, Université Paris Diderot, Sorbonne Paris Cité, AP-HP, Hôpital Saint-Louis, Laboratoire d'Immunologie, Paris, France
| | - J A Snowden
- Department of Haematology, Sheffield Teaching Hospitals NHS Foundation Trust & University of Sheffield, Sheffield, UK
| | - D Farge
- Saint Louis Hospital, Unité de Médecine interne et Pathologie Vasculaire, Assistance Publique des Hôpitaux de Paris, Paris 7 University, INSERM U1160, Paris, France
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Skiredj A, Beniddir MA, Joseph D, Leblanc K, Bernadat G, Evanno L, Poupon E. A Unified Bioinspired “Aplysinopsin Cascade”: Total Synthesis of (±)-Tubastrindole B and Related Biosynthetic Congeners. Org Lett 2014; 16:4980-3. [DOI: 10.1021/ol502177m] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Adam Skiredj
- Laboratoire
de pharmacognosie, Université Paris-Sud, UMR CNRS 8076 BioCIS, LabEx LERMIT, Faculté de Pharmacie, 5, rue Jean-Baptiste Clément, 92296 Châtenay-Malabry, France
| | - Mehdi A. Beniddir
- Laboratoire
de pharmacognosie, Université Paris-Sud, UMR CNRS 8076 BioCIS, LabEx LERMIT, Faculté de Pharmacie, 5, rue Jean-Baptiste Clément, 92296 Châtenay-Malabry, France
| | - Delphine Joseph
- Laboratoire
de pharmacognosie, Université Paris-Sud, UMR CNRS 8076 BioCIS, LabEx LERMIT, Faculté de Pharmacie, 5, rue Jean-Baptiste Clément, 92296 Châtenay-Malabry, France
| | - Karine Leblanc
- Laboratoire
de pharmacognosie, Université Paris-Sud, UMR CNRS 8076 BioCIS, LabEx LERMIT, Faculté de Pharmacie, 5, rue Jean-Baptiste Clément, 92296 Châtenay-Malabry, France
| | - Guillaume Bernadat
- Équipe
“Molécules fluorées et chimie médicinale”, Université Paris-Sud, UMR CNRS
8076 BioCIS, LabEx LERMIT, Faculté de Pharmacie, 5, rue Jean-Baptiste Clément, 92296 Châtenay-Malabry, France
| | - Laurent Evanno
- Laboratoire
de pharmacognosie, Université Paris-Sud, UMR CNRS 8076 BioCIS, LabEx LERMIT, Faculté de Pharmacie, 5, rue Jean-Baptiste Clément, 92296 Châtenay-Malabry, France
| | - Erwan Poupon
- Laboratoire
de pharmacognosie, Université Paris-Sud, UMR CNRS 8076 BioCIS, LabEx LERMIT, Faculté de Pharmacie, 5, rue Jean-Baptiste Clément, 92296 Châtenay-Malabry, France
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Skiredj A, Beniddir MA, Joseph D, Leblanc K, Bernadat G, Evanno L, Poupon E. Spontaneous Biomimetic Formation of (±)‐Dictazole B under Irradiation with Artificial Sunlight. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403454] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Adam Skiredj
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCIS, LabEx LERMIT, Université Paris‐Sud, 5, rue Jean‐Baptiste Clément, 92296 Châtenay‐Malabry (France) http://www.biocis.u‐psud.fr
| | - Mehdi A. Beniddir
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCIS, LabEx LERMIT, Université Paris‐Sud, 5, rue Jean‐Baptiste Clément, 92296 Châtenay‐Malabry (France) http://www.biocis.u‐psud.fr
| | - Delphine Joseph
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCIS, LabEx LERMIT, Université Paris‐Sud, 5, rue Jean‐Baptiste Clément, 92296 Châtenay‐Malabry (France) http://www.biocis.u‐psud.fr
| | - Karine Leblanc
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCIS, LabEx LERMIT, Université Paris‐Sud, 5, rue Jean‐Baptiste Clément, 92296 Châtenay‐Malabry (France) http://www.biocis.u‐psud.fr
| | - Guillaume Bernadat
- Équipe “Molécules fluorées et chimie médicinale” UMR 8076 BioCIS, LabEx LERMIT, Université Paris‐Sud, 5, rue Jean‐Baptiste Clément, 92296 Châtenay‐Malabry (France)
| | - Laurent Evanno
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCIS, LabEx LERMIT, Université Paris‐Sud, 5, rue Jean‐Baptiste Clément, 92296 Châtenay‐Malabry (France) http://www.biocis.u‐psud.fr
| | - Erwan Poupon
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCIS, LabEx LERMIT, Université Paris‐Sud, 5, rue Jean‐Baptiste Clément, 92296 Châtenay‐Malabry (France) http://www.biocis.u‐psud.fr
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Skiredj A, Beniddir MA, Joseph D, Leblanc K, Bernadat G, Evanno L, Poupon E. Spontaneous Biomimetic Formation of (±)‐Dictazole B under Irradiation with Artificial Sunlight. Angew Chem Int Ed Engl 2014; 53:6419-24. [DOI: 10.1002/anie.201403454] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Indexed: 11/11/2022]
Affiliation(s)
- Adam Skiredj
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCIS, LabEx LERMIT, Université Paris‐Sud, 5, rue Jean‐Baptiste Clément, 92296 Châtenay‐Malabry (France) http://www.biocis.u‐psud.fr
| | - Mehdi A. Beniddir
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCIS, LabEx LERMIT, Université Paris‐Sud, 5, rue Jean‐Baptiste Clément, 92296 Châtenay‐Malabry (France) http://www.biocis.u‐psud.fr
| | - Delphine Joseph
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCIS, LabEx LERMIT, Université Paris‐Sud, 5, rue Jean‐Baptiste Clément, 92296 Châtenay‐Malabry (France) http://www.biocis.u‐psud.fr
| | - Karine Leblanc
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCIS, LabEx LERMIT, Université Paris‐Sud, 5, rue Jean‐Baptiste Clément, 92296 Châtenay‐Malabry (France) http://www.biocis.u‐psud.fr
| | - Guillaume Bernadat
- Équipe “Molécules fluorées et chimie médicinale” UMR 8076 BioCIS, LabEx LERMIT, Université Paris‐Sud, 5, rue Jean‐Baptiste Clément, 92296 Châtenay‐Malabry (France)
| | - Laurent Evanno
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCIS, LabEx LERMIT, Université Paris‐Sud, 5, rue Jean‐Baptiste Clément, 92296 Châtenay‐Malabry (France) http://www.biocis.u‐psud.fr
| | - Erwan Poupon
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076 BioCIS, LabEx LERMIT, Université Paris‐Sud, 5, rue Jean‐Baptiste Clément, 92296 Châtenay‐Malabry (France) http://www.biocis.u‐psud.fr
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Gravel E, Harfouche A, Salame R, Leblanc K, Maciuk A, Poupon E. Spontaneous Formation of Nitrarine and Polycyclic Skeletons Related toNitrariaIndolic Alkaloids under Non-Enzymic Conditions. Chemistry 2013; 19:14515-20. [DOI: 10.1002/chem.201301877] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Indexed: 11/08/2022]
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Coulerie P, Nour M, Maciuk A, Eydoux C, Guillemot JC, Lebouvier N, Hnawia E, Leblanc K, Lewin G, Canard B, Figadère B. Structure-activity relationship study of biflavonoids on the Dengue virus polymerase DENV-NS5 RdRp. Planta Med 2013; 79:1313-8. [PMID: 23929244 DOI: 10.1055/s-0033-1350672] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Dengue virus is the world's most prevalent human pathogenic arbovirus. There is currently no treatment or vaccine, and solutions are urgently needed. We previously demonstrated that biflavonoids from Dacrydium balansae, an endemic gymnosperm from New Caledonia, are potent inhibitors of the Dengue virus NS5 RNA-dependent RNA polymerase. Herein we describe the structure-activity relationship study of 23 compounds: biflavonoids from D. balansae (1-4) and from D. araucarioides (5-10), hexamethyl-amentoflavone (11), cupressuflavone (12), and apigenin derivatives (13-23). We conclude that 1) over the four different biflavonoid skeletons tested, amentoflavone (1) and robustaflavone (5) are the most promising ones for antidengue drug development, 2) the number and position of methyl groups on the biflavonoid moiety modulate their inhibition of Dengue virus NS5 RNA-dependent RNA polymerase, and 3) the degree of oxygenation of flavonoid monomers influences their antidengue potential. Sotetsuflavone (8), with an IC50 = 0.16 µM, is the most active compound of this series and is the strongest inhibitor of the Dengue virus NS5 RNA-dependent RNA polymerase described in the literature.
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Affiliation(s)
- Paul Coulerie
- Laboratoire Insulaire du Vivant et de l'Environnement, Université de la Nouvelle-Calédonie, Nouméa, Nouvelle-Calédonie
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Caron J, Maksimenko A, Wack S, Lepeltier E, Bourgaux C, Morvan E, Leblanc K, Couvreur P, Desmaële D. Improving the antitumor activity of squalenoyl-paclitaxel conjugate nanoassemblies by manipulating the linker between paclitaxel and squalene. Adv Healthc Mater 2013; 2:172-85. [PMID: 23213041 DOI: 10.1002/adhm.201200099] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Revised: 07/24/2012] [Indexed: 11/06/2022]
Abstract
A series of new lipid prodrugs of paclitaxel, which can be formulated as nanoassemblies, are described. These prodrugs which are designed to overcome the limitations due to the systemic toxicity and low water solubility of paclitaxel consist of a squalene chain bound to the 2'-OH of paclitaxel through a 1,4-cis,cis-dienic linker. This design allows the squalene-conjugates to self-assemble as nanoparticular systems while preserving an efficient release of the free drug, thanks to the dienic spacer. The size, steric hindrance, and functional groups of the spacer have been modulated. All these prodrugs self-assemble into nanosized aggregates in aqueous solution as characterized by dynamic light scattering and transmission electron microscopy and appear stable in water for several days as determined by particle size measurement. In vitro biological assessment shows that these squalenoyl-paclitaxel nanoparticles display notable cytotoxicity on several tumor cell lines including A549 lung cell line, colon cell line HT-29, or KB 3.1 nasopharyngeal epidermoid cell line. The cis,cis-squalenyl-deca-5,8-dienoate prodrug show improved activity over simple 2'-squalenoyl-paclitaxel prodrug highlighting the favourable effect of the dienic linker. The antitumor efficacy of the nanoassemblies constructed with the more active prodrugs has been investigated on human lung (A549) carcinoma xenograft model in mice. The prodrug bearing the cis,cis-deca-5,8-dienoyl linker shows comparable antitumor efficacy to the parent drug, but reveals a much lower subacute toxicity as seen in body weight loss. Thus, nanoparticles with the incorporated squalenoyl paclitaxel prodrug may prove useful for replacement of the toxic Cremophor EL.
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Valentinis A, Ivers N, Bhatia R, Leblanc K, Grinman M, Meshkat N, Ha A, Morra D. 615 Comparison of the 2010 and 2012 Canadian Cardiovascular Society Atrial Fibrillation Guidelines in a Large Urban Family Practice. Can J Cardiol 2012. [DOI: 10.1016/j.cjca.2012.07.553] [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: 11/25/2022] Open
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Dufau L, Marques Ressurreição AS, Fanelli R, Kihal N, Vidu A, Milcent T, Soulier JL, Rodrigo J, Desvergne A, Leblanc K, Bernadat G, Crousse B, Reboud-Ravaux M, Ongeri S. Carbonylhydrazide-based molecular tongs inhibit wild-type and mutated HIV-1 protease dimerization. J Med Chem 2012; 55:6762-75. [PMID: 22800535 DOI: 10.1021/jm300181j] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We have designed and synthesized new molecular tongs based on a rigid naphthalene scaffold and evaluated their antidimer activity on HIV-1 protease (PR). We inserted carbonylhydrazide and oligohydrazide (azatide) fragments into their peptidomimetic arms to reduce hydrophobicity and increase metabolic stability. These fragments are designed to disrupt the protein-protein interactions by reproducing the hydrogen bond pattern found in the antiparallel β-sheet formed between the N- and C-ends of the two monomers in the native PR. Kinetic analyses and fluorescent probe binding studies showed that several molecular tongs can inhibit PR dimerization. The best nonpeptidic molecular tongs to date were obtained with an inhibition constant K(id) of 50 nM for PR and 80 nM for the multimutated protease ANAM-11. The PR inhibition was selective, the aspartic proteases renin and pepsin were not inhibited.
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Affiliation(s)
- Laure Dufau
- UMR-CNRS 8076, Molécules Fluorées et Chimie Médicinale, LabEx LERMIT, Faculté de Pharmacie, Université Paris-Sud 11, 5 rue J. B. Clément, 92296 Châtenay-Malabry Cedex, France
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Cebrián-Torrejón G, Assad Kahn S, Lagarde N, Castellano F, Leblanc K, Rodrigo J, Molinier-Frenkel V, Rojas de Arias A, Ferreira ME, Thirant C, Fournet A, Figadère B, Chneiweiss H, Poupon E. Antiproliferative activity of trans-avicennol from Zanthoxylum chiloperone var. angustifolium against human cancer stem cells. J Nat Prod 2012; 75:257-261. [PMID: 22304006 DOI: 10.1021/np2004165] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Zanthoxylum chiloperone var. angustifolium root bark was studied with the aim of finding novel molecules able to overcome cancer stem cell chemoresistance. Purification of a methanol-soluble extract resulted in the isolation of a known pyranocoumarin, trans-avicennol (1). Compound 1 demonstrated antiproliferative activity on glioma-initiating cells, whereas it was inactive on human neural stem cells. trans-Avicennol (1) activated the MAPK/ERK pathway and was also evaluated for its ability to inhibit the enzyme indoleamine-2,3-dioxygenase.
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Affiliation(s)
- Gerardo Cebrián-Torrejón
- Laboratoire de Pharmacognosie Associé au CNRS UMR 8076 BioCIS, LabEx LERMIT, Faculté de Pharmacie, Université Paris-Sud, 5 Rue Jean-Baptiste Clément, 92296 Châtenay-Malabry, France
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Cebrian-Torrejon G, Spelman K, Leblanc K, Munoz-Durango K, Gutierrez ST, Ferreira ME, Arias ARD, Figadere B, Fournet A, Maciuk A, Grellier P, Cech NB, Poupon E. The antiplasmodium effects of a traditional South American remedy: Zanthoxylum chiloperone var. angustifolium against chloroquine resistant and chloroquine sensitive strains of Plasmodium falciparum. Rev bras farmacogn 2011. [DOI: 10.1590/s0102-695x2011005000104] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Ferreira ME, Cebrián-Torrejón G, Corrales AS, Vera de Bilbao N, Rolón M, Gomez CV, Leblanc K, Yaluf G, Schinini A, Torres S, Serna E, Rojas de Arias A, Poupon E, Fournet A. Zanthoxylum chiloperone leaves extract: first sustainable Chagas disease treatment. J Ethnopharmacol 2011; 133:986-993. [PMID: 21134431 DOI: 10.1016/j.jep.2010.11.032] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2010] [Revised: 11/08/2010] [Accepted: 11/11/2010] [Indexed: 05/30/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Zanthoxylum chiloperone var. angustifolium Engl. (Rutaceae) stem bark is used traditionally in Paraguay for its antiparasitic properties. Canthin-6-one is main compound isolated from Zanthoxylum chiloperone var angustifolium with broad spectrum antifungal, leishmanicidal and trypanocidal activities. AIM OF THE STUDY The qualitative and quantitative characterization and the isolation of main alkaloidal components of different organs of Zanthoxylum chiloperone are investigated by HPLC-UV-MS. The in vitro biological activity of each extract against trypomastigote and amastigote forms of Trypanosoma cruzi parasites were evaluated, then comparison the in vivo efficacy of the ethanolic leaves extract of Zanthoxylum chiloperone with reference drug, benznidazole, in acute Trypanosoma cruzi infected mice when administered by oral route. We have also evaluated the mutagenic and cytotoxic activity of the main component of Zanthoxylum chiloperone, i.e. canthin-6-one, by mouse bone marrow micronucleus test. MATERIALS AND METHODS The compositions of the ethanol extracts obtained after the maceration process were studied by HPLC-UV-MS methods. The quantitation analysis was performed by external standard method, using a calibration curve constructed utilizing solutions containing different concentrations of the reference samples. The anti-trypomastigote activity was evaluated by the lysis effect on mouse blood trypomastigotes (Y strain Trypanosoma cruzi). The anti-amastigote Trypanosoma cruzi activity was evaluated by a modified colorimetric method with chlorophenol red-β-d-galactopyranoside (CPRG). The cytotoxicity of extracts and compounds was performed on NCTC 929 cells. The in vivo efficacy of the ethanolic leaves extract of Zanthoxylum chiloperone and benznidazole, in acute Trypanosoma cruzi (two different strains) was evaluated in Trypanosoma cruzi infected mice; the drugs were administered by oral route. The mortality rates were recorded and parasitaemias in control and treated mice were determined once weekly for 70 days. The mutagenic and cytotoxic activity of the main component of Zanthoxylum chiloperone, canthin-6-one, by mouse bone marrow micronucleus test. RESULTS Canthin-6-one was the main compound of stem and root bark and 5-methoxy-canthin-6-one in leaves and fruits. The ethanolic leaves extract, canthin-6-one and benznidazole presented, approximately, the same level of in vitro activity against trypomastigote and amastigote forms of Trypanosoma cruzi. We have also evaluated the mutagenic and cytotoxic effects of canthin-6-one by micronucleus test in mice. This test showed any mutagenic and cytotoxic damages. The effects of oral or subcutaneous treatments at 10 mg/kg daily for 2 weeks with the ethanolic extract of leaves of Zanthoxylum chiloperone were examined in Balb/c mice infected acutely with Trypanosoma cruzi (CL or Y strain) and compared with benznidazole at 50 mg/kg for 2 weeks. In these experiments, 70 days after infection, parasitaemia and serological response were significantly reduced with the oral ethanolic extract treatment compared with reference drug. CONCLUSIONS This study have shown the efficacy of the leaves extract of Zanthoxylum chiloperone in reducing Trypanosoma cruzi parasitaemia in vivo assays and could be welcomed by scientific and rural communities of Paraguay because it could help them towards the use of local resources to treat an endemic infection, Chagas disease, affecting 20% of the population of this country.
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Affiliation(s)
- Maria Elena Ferreira
- Department of Tropical Medicine, Casilla de Correo 2511, Instituto de Investigaciones en Ciencias de la Salud Asunción, Universidad Nacional de Asunción, Paraguay
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King AL, Sañudo-Wilhelmy SA, Leblanc K, Hutchins DA, Fu F. CO2 and vitamin B12 interactions determine bioactive trace metal requirements of a subarctic Pacific diatom. ISME J 2011; 5:1388-96. [PMID: 21248860 PMCID: PMC3146264 DOI: 10.1038/ismej.2010.211] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Phytoplankton growth can be limited by numerous inorganic nutrients and organic growth factors. Using the subarctic diatom Attheya sp. in culture studies, we examined how the availability of vitamin B12 and carbon dioxide partial pressure (pCO2) influences growth rate, primary productivity, cellular iron (Fe), cobalt (Co), zinc (Zn) and cadmium (Cd) quotas, and the net use efficiencies (NUEs) of these bioactive trace metals (mol C fixed per mol cellular trace metal per day). Under B12-replete conditions, cells grown at high pCO2 had lower Fe, Zn and Cd quotas, and used those trace metals more efficiently in comparison with cells grown at low pCO2. At high pCO2, B12-limited cells had ∼50% lower specific growth and carbon fixation rates, and used Fe ∼15-fold less efficiently, and Zn and Cd ∼3-fold less efficiently, in comparison with B12-replete cells. The observed higher Fe, Zn and Cd NUE under high pCO2/B12-replete conditions are consistent with predicted downregulation of carbon-concentrating mechanisms. Co quotas of B12-replete cells were ∼5- to 14-fold higher in comparison with B12-limited cells, suggesting that >80% of cellular Co of B12-limited cells was likely from B12. Our results demonstrate that CO2 and vitamin B12 interactively influence growth, carbon fixation, trace metal requirements and trace metal NUE of this diatom. This suggests the need to consider complex feedback interactions between multiple environmental factors for this biogeochemically critical group of phytoplankton in the last glacial maximum as well as the current and future changing ocean.
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Affiliation(s)
- Andrew L King
- Department of Biological Sciences, University of Southern California, 3616 Trousdale Pkwy., Los Angeles, CA 90089, USA.
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Abstract
Following new biosynthetic proposals, an expeditious synthesis of tangutorine, an indolic alkaloid from Nitraria tangutorum has been achieved in three steps from simple C(5) lysine-derived units. The work also includes further insights into the biosynthesis of Nitraria alkaloids.
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Affiliation(s)
- Rim Salame
- Laboratoire de Pharmacognosie associé au CNRS, UMR 8076-BioCIS, Faculté de Pharmacie, Université Paris-Sud 11, 92296 Châtenay-Malabry, France
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Leblanc K. A seasonal study of diatom dynamics in the North Atlantic during the POMME experiment (2001): Evidence for Si limitation of the spring bloom. ACTA ACUST UNITED AC 2005. [DOI: 10.1029/2004jc002621] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [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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Leblanc K. Siliceous phytoplankton production and export related to trans-frontal dynamics of the Almeria-Oran frontal system (western Mediterranean Sea) during winter. ACTA ACUST UNITED AC 2004. [DOI: 10.1029/2003jc001878] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [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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Leblanc K, Quéguiner B, Garcia N, Rimmelin P, Raimbault P. Silicon cycle in the NW Mediterranean Sea: seasonal study of a coastal oligotrophic site. ACTA ACUST UNITED AC 2003. [DOI: 10.1016/s0399-1784(03)00035-5] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.6] [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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Schneider H, O'Hearn DJ, Leblanc K, Smith PL, O'Donnell CP, Eisele DW, Peter JH, Schwartz AR. High-flow transtracheal insufflation treats obstructive sleep apnea. A pilot study. Am J Respir Crit Care Med 2000; 161:1869-76. [PMID: 10852759 DOI: 10.1164/ajrccm.161.6.9902061] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
To determine the effect of transtracheal insufflation (TTI) on obstructive sleep apnea (OSA), we examined breathing patterns in five tracheostomized patients with OSA at varying TTI flow rates when breathing with a closed tracheostomy. The breathing patterns and polysomnographic responses to air insufflation were studied as TTI was increased from 0 to 15 L/min for brief periods of non-rapid eye movement (NREM) sleep (Experiment 1). The frequency of sleep-disordered breathing episodes remained high at 0 and 5 L/min (87.0 +/- 33.7 and 79.4 +/- 24.4 episodes per hour NREM) and decreased significantly to 41.3 +/- 31.5 and 43.4 +/- 31.4 episodes/h NREM sleep at rates of 10 and 15 L/min, respectively (p = 0.003). At high levels of TTI (10 and 15 L/min), obstructive apneas and hypopneas decreased but periodic laryngeal obstructions were induced during stage 1 NREM sleep. To prevent laryngeal obstructions, a servo-control system was used to briefly interrupt TTI during these events. When this system was implemented for more prolonged periods of sleep (Experiment 2, total sleep time 176.6 +/- 12.5 min), high-flow TTI (hf-TTI, 15 L/min) led to an overall reduction in the combined frequency of obstructive apneas and laryngeal obstructions from 63.8 +/- 21.8 to 10.7 +/- 9.1 (p < 0.03) and was associated with a marked reduction in arousal frequency from 60.0 +/- 26.0 to 8. 3 +/- 5.4/h in NREM sleep, and from 67.5 +/- 3.5 to 0 +/- 0/h in rapid eye movement (REM) sleep. Our findings demonstrate that hf-TTI stabilized breathing patterns in apneic patients, and was safe and efficacious for prolonged periods of sleep.
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Affiliation(s)
- H Schneider
- Johns Hopkins Sleep Disorders Center, Division of Pulmonary and Critical Care Medicine, and Department of Otolaryngology, Johns Hopkins University, Baltimore, Maryland, USA
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