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<dc:title xml:lang="fr">Approche métabolomique pour une caractérisation plus fine d'extraits de plantes d'intérêts pour la santé humaine</dc:title>
<dcterms:alternative xml:lang="en">A complementary metabolomics approach to screen metabolic fingerprints of plant extracts used in human health</dcterms:alternative>
<dc:subject xml:lang="fr">Teintures-mères</dc:subject>
<dc:subject xml:lang="fr">GC-MS</dc:subject>
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<dc:subject xml:lang="fr">Homéopathie</dc:subject>
<dc:subject xml:lang="fr">Phytothérapie</dc:subject>
<dc:subject xml:lang="en">Tinctures</dc:subject>
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<dc:subject xml:lang="en">Semi-preparative HPLC-UV-MS</dc:subject>
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<dcterms:abstract xml:lang="fr">Ces travaux ont pour but d’identifier des métabolites dans des teintures-mères (TMs) utilisées en homéopathie et en phytothérapie pour mieux contrôler la qualité des TMs et de mieux comprendre leur mode d’action sur la santé humaine. Nous avons étudié, par une approche de métabolomique globale, 19 TMs et un produit leader : le L52, fabriqués par les Laboratoires Lehning. Premièrement, nous avons utilisé des approches non-ciblées en construisant des banques de données GC-MS et UPLC-MS/MS, afin d’identifier un maximum de molécules dans chaque extrait. Puis, nous avons fractionné certaines TMs et purifié des métabolites inconnus pour une identification fine en HRMS. Nous avons identifié de nombreuses molécules dans chaque TM, montrant que ces dernières sont très riches en molécules pouvant être utilisées pour le contrôle-qualité des TMs et valorisées pour la santé humaine.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Tinctures defined as hydro-alcoholic extracts have been used from centuries in homeopathy and phytotherapy, but their chemical compositions remain still unknown. During my PhD, metabolomics analyses of nineteen tinctures and one leader product, L52, made by Laboratoires Lehning, were conducted using untargeted metabolomic approach. We build GC-MS and UPLC-MS/MS databases to identify a large amount of metabolites. Then, we used semi-preparative HPLC with both UV and mass detection to isolate some compounds from tinctures. We used UPLC-HRMS to obtain chemical formula, a prerequisite for metabolites identification. Finally, we identified a broad range of different metabolites in each tincture, highlighting the metabolic complexity of the TMs. These molecules can now be used for quality-control and valued for a better understanding of these products on human health.</dcterms:abstract>
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