Sélection de workflows adaptés à une analyse métabolomique plus transparente et intégrative
Autre(s) titre(s) | Screening workflows towards more transparent and integrative metabolomics analysi | ||||||||
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Type | Poster | ||||||||
Date | 2019-05-15 | ||||||||
Langue(s) | Français | ||||||||
URL alternative | https://phycotox2019.sciencesconf.org/ | ||||||||
Auteur(s) | Mondeguer Florence![]() ![]() |
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Affiliation(s) | 1 : Ifremer DYNECO/PHYC – Centre Atlantique, 44311 Cedex 03, Rue de l'Île d'Yeu, Nantes, France 2 : School of Pharmaceutical Sciences (EPGL), University of Geneva, University of Lausanne, (CMU), Geneva, Switzerland 3 : Département de Pharmacochimie Moléculaire, CNRS UMR5063, Université Grenoble Alpes, 38400, St Martin d’Heres, France 4 : Laboratoire de Pharmacognosie, de Bromatologie et de Nutrition Humaine, Université Libre de Bruxelles, 1050 Brussels, Belgium 5 : Institut de Chimie des Substances Naturelles, CNRS]ICSN UPR2301, Universite Paris]Sud, Gif]sur]Yvette, France 6 : LABERCA, Oniris, INRA, Université Bretagne-Loire, Nantes, France 7 : Ifremer DYNECO/Pelagos – Centre de Bretagne, Technopole Brest Iroise, BP 70, 29280, Plouzané, France |
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Conférence | Phycotox2019 : Conférence nationale sur les algues toxiques GdR Phycotox. 15-16 mai 2019, Brest | ||||||||
Résumé | Au cours de leur cycle de vie, Alexandrium minutum et Scrippsiella donghaienis peuvent produire des kystes résistants et revivables qui peuvent s'accumuler dans les sédiments marins pendant des centaines d'années. Notre hypothèse de travail suppose que ces deux genres ont "enregistré" leur adaptation aux changements de l'écosystème dans ces cellules conservées sous forme de kystes. À partir de ces kystes réanimés, des cultures de dinoflagellés toxiques et non toxiques (Alexandrium minutum et Scrippsiella donghaienis) ont été analysées par une approche métabolomique afin d'étudier les réponses adaptatives possibles du phytoplancton à ces changements des écosystèmes côtiers. |
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Résumé en anglais | During their life cycle, Alexandrium minutum and Scrippsiella donghaienis can produce resistant and revivable cysts that can accumulate in marine sediments for hundreds of years. Our working hypothesis assumes that these two genera have "recorded" their adaptation to ecosystem changes in these cells preserved in the form of cysts. From these revived cysts, toxic and non-toxic dinoflagellate cultures (Alexandrium minutum and Scrippsiella donghaienis) were analyzed by a metabolomic approach to investigate the possible adaptive responses of phytoplankton to these changes in coastal ecosystems. The strains were obtained from isotopically dated sediments, 1986 and 1996 for "ancient" and 2006 for "modern". In total, 84 samples were obtained. Each experimental condition (species combinations, age, and growth phase) was grown in triplicate. Extracts from different growth phases of the ancient and modern strains of Alexandrium minutum and Scrippsiella donghaienis were analyzed by LC-HRMS and compared via two workflows: a chemometrics platform, Agilent Mass Profiler Professional (MPP) and the collaborative portal "Workflow4Metabolomics". It is interesting to note that regardless of the workflows used (MPP or Galaxy), the metabolomic profiles of cultures reactivated at different ages were more different than those of different growth phases. While A. Minutum did not generally show the specific metabolites of the different stages but only common compounds, S. donghaienis contained metabolites specific for P deficiency. Molecular network analysis (MZmine2_GNPS_ Cytoscape_MetGem) provided a better understanding of these metabolites produced in phosphorus deficiency condition. |
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