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<dc:title xml:lang="fr">Recherche de sécrétagogues naturels du GLP-1 : exploration du potentiel antidiabétique d'espèces du genre Cynanchum (Apocynaceae)</dc:title>
<dcterms:alternative xml:lang="en">Research for natural GLP-1 secretagogues : exploration of the antidiabetic potential of Cynanchum species (Apocyanceae)</dcterms:alternative>
<dc:subject xml:lang="fr">Asclépiadoidées</dc:subject>
<dc:subject xml:lang="fr">Cynanchum marnierianum</dc:subject>
<dc:subject xml:lang="fr">Cynanchum menarandrense</dc:subject>
<dc:subject xml:lang="fr">Glycosides prégnaniques</dc:subject>
<dc:subject xml:lang="fr">Diabète de type 2</dc:subject>
<dc:subject xml:lang="fr">Incrétine</dc:subject>
<dc:subject xml:lang="fr">STC-1</dc:subject>
<dc:subject xml:lang="fr">P57</dc:subject>
<dc:subject xml:lang="fr">Triterpènes</dc:subject>
<dc:subject xml:lang="fr">Flanoïdes</dc:subject>
<dc:subject xml:lang="fr">MTT</dc:subject>
<dc:subject xml:lang="fr">MTS</dc:subject>
<dc:subject xml:lang="fr">Cytométrie</dc:subject>
<dc:subject xml:lang="en">Asclepiadoidae</dc:subject>
<dc:subject xml:lang="en">Cynanchum marnierianum</dc:subject>
<dc:subject xml:lang="en">Cynanchum menarandrense</dc:subject>
<dc:subject xml:lang="en">Pregnane glycosides</dc:subject>
<dc:subject xml:lang="en">Type 2 diabetes</dc:subject>
<dc:subject xml:lang="en">Incretin</dc:subject>
<dc:subject xml:lang="en">STC-1</dc:subject>
<dc:subject xml:lang="en">P57</dc:subject>
<dc:subject xml:lang="en">Triterpenes</dc:subject>
<dc:subject xml:lang="en">Flavonoids</dc:subject>
<dc:subject xml:lang="en">MTT</dc:subject>
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<dc:subject xml:lang="en">Cytometry</dc:subject>
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<tef:elementdEntree autoriteExterne="034968644" autoriteSource="Sudoc">Prégnanes</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="027340996" autoriteSource="Sudoc">Hypoglycémiants</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="113532237" autoriteSource="Sudoc">Cynanchum</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="050525166" autoriteSource="Sudoc">Chimie végétale</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Dans le cadre de la recherche de composés pouvant stimuler la sécrétion de l’hormone hypoglycémiante GLP-1 (glucagon-like-peptide 1) et sur des critères ethno-pharmacologiques et taxonomiques, différentes Asclepiadoidées ont été criblées sur un modèle cellulaire (lignée STC-1). Cette approche nous a permis de sélectionner deux espèces de Cynanchum malgaches. L’isolement bio-guidé de C. marnierianum a conduit à la purification de 2 nouveaux glycosides prégnaniques, les marnieranosides. L’exploration phytochimique de C. menarandrense a permis l’identification de 5 nouvelles structures prégnaniques et de 2 prégnanes déjà signalés dans un genre taxonomiquement proche et hypoglycémiant : Caralluma. Les prégnanes purifiés ont aussi été évalués pour leur effet sécrétagogue GLP-1 et cytotoxique mais seuls les marnieranosides se sont avérés bioactifs. Des analogies structurales entre les molécules identifiées dans le genre Cynanchum et des molécules bioactives isolées au préalable d’espèces antidiabétiques (genres Hoodia et Caralluma) valident notre stratégie pour la découverte des métabolites secondaires avec un potentiel antidiabétique.</dcterms:abstract>
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