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<dc:title xml:lang="fr">Mise en place d’une méthodologie pour l’identification et la quantification de molécules marquées au 13C par spectroscopie RMN HRMA, appliquée à la recherche biomédicale</dc:title>
<dcterms:alternative xml:lang="en">Development of a methodology for the identification and quantification of 13C-labeled molecules by HRMAS NMR spectroscopy, applied to biomedical research</dcterms:alternative>
<dc:subject xml:lang="fr">RMN HRMAS</dc:subject>
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<dc:subject xml:lang="fr">Isotopologues</dc:subject>
<dc:subject xml:lang="fr">Quantification</dc:subject>
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<dc:subject xml:lang="fr">Métabolisme</dc:subject>
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<dc:subject xml:lang="en">HRMAS NMR</dc:subject>
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<tef:elementdEntree autoriteExterne="157478920" autoriteSource="Sudoc">Micro-environnement tumoral</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">La spectroscopie RMN HRMAS est un outil puissant pour l’analyse métabolomique, permettant l’identification et la quantification de métabolites dans des tissus et cultures cellulaires. Dans cette thèse, nous avons développé une méthodologie pour l’étude de métabolites marqués au ¹³C afin d’explorer les voies métaboliques tumorales et leurs modifications sous traitements. Huit séquences RMN 1D et 2D ont été optimisées pour l’analyse des isotopologues et associées à l’utilisation de sondes enrichies en ¹³C. Appliquée à différents modèles biologiques, cette approche permet de suivre l’incorporation des substrats et de quantifier l’abondance isotopique des produits métaboliques. En parallèle, nous avons contribué au développement d’un logiciel avec Chenomx pour améliorer la quantification. Ces travaux apportent de nouvelles perspectives pour comprendre le métabolisme tumoral et identifier de potentielles cibles thérapeutiques.</dcterms:abstract>
<dcterms:abstract xml:lang="en">HRMAS NMR spectroscopy is a powerful tool for metabolomic analysis, enabling the identification and quantification of metabolites in tissues and cell cultures. In this thesis, we developed a methodology for the study of ¹³C-labeled metabolites to explore tumor metabolic pathways and their treatment-induced modifications. Eight optimized 1D and 2D NMR pulse sequences were implemented for isotopologue analysis, combined with the use of ¹³C-enriched probes. Applied to various biological models, this approach enables tracking of substrate incorporation and quantification of isotopic abundance of metabolic products. In parallel, we contributed to the development of a software tool with Chenomx to improve metabolite quantification. This work provides new insights into tumor metabolism under therapy and may help identify potential therapeutic targets for personalized medicine.</dcterms:abstract>
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