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<dc:title xml:lang="fr">Conception, synthèse et évaluations de sondes fluorogènes et solvatofluorochromes pour l’étude des récepteurs couplés aux protéines G : application aux récepteurs de l’ocytocine et de la spexine</dc:title>
<dcterms:alternative xml:lang="en">Design, synthesis and evaluations of fluorogenic and solvatofluorochromic probes for the study of G protein-coupled receptors : application to oxytocin and spexin receptors</dcterms:alternative>
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<dc:subject xml:lang="fr">Acide aminé fluorescent</dc:subject>
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<dc:subject xml:lang="fr">Test de liaison</dc:subject>
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<dc:subject xml:lang="en">Fluorogenic</dc:subject>
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<dcterms:abstract xml:lang="fr">Des sondes fluorescentes innovantes sensibles à la polarité de l’environnement dérivées du Nile Red ont été développées pour suivre les interactions ligand-RCPG en ciblant tout particulièrement deux récepteurs d’intérêt thérapeutique, le récepteur de l’ocytocine (OTR) et celui de la galanine de type 2 (GalR2). L’antagoniste de l’OTR non peptidique fluorescent développé a permis d’étudier le microenvironnement de ce récepteur et d’obtenir des résultats très prometteurs pour la mise au point d’un test de liaison ligand-récepteur fluorogène pour le RCPG de l’ocytocine. Les ligands du GalR2 fluorescents développés dérivés de la spexine ont permis d’imager spécifiquement ce RCPG en conditions homogènes. Ils seront utilisés pour suivre la signalisation du GalR2 et mettre au point un test de liaison ligand-récepteur fluorogène pour ce RCPG. Finalement, l’acide aminé fluorescent hydrosoluble dérivé du Nile Red développé sera utilisé pour comprendre le mécanisme d’augmentation de la stabilité et de l’efficacité des peptides fluorospexines récemment développés comparés à la spexine.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Innovative fluorescent Nile Red-based probes sensitive to the polarity of the environment were developed to monitor the ligand-GPCR interactions by targeting in particular two GPCR of therapeutic interest, the oxytocin receptor (OTR) and the galanin receptor 2 (GalR2). The developed fluorescent non-peptidic OTR antagonist allowed us to study the microenvironment of this receptor and to obtain very promising results for the development of a fluorogenic receptor-ligand binding assay for the oxytocin GPCR. The developed fluorescent spexin-based GalR2 ligands allowed us to specifically image this GPCR under no-wash conditions. They will be used to monitor the signaling of the GalR2 and to develop a fluorogenic receptor-ligand binding assay for this GPCR. Finally, the developed water-soluble fluorescent Nile Red-based amino acid will be used to understand the mechanism of increase of stability and efficacy of recently developed fluorospexin peptides compared to spexin.</dcterms:abstract>
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