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<dc:title xml:lang="fr">Synthèse et étude préclinique de chélateurs octadentes bifonctionnels pour des applications en médecine nucléaire</dc:title>
<dcterms:alternative xml:lang="en">Synthesis and preclinical study of bifunctional octadentate chelators for applications in nuclear medicine</dcterms:alternative>
<dc:subject xml:lang="fr">Chélateur octadente</dc:subject>
<dc:subject xml:lang="fr">Radioéléments (44Sc, 68Ga, 89Zr, 161Tb,177Lu)</dc:subject>
<dc:subject xml:lang="fr">Imagerie (TEP, TEMP)</dc:subject>
<dc:subject xml:lang="fr">Radiothérapie</dc:subject>
<dc:subject xml:lang="en">Octadentate chelator</dc:subject>
<dc:subject xml:lang="en">Radioelements (44Sc, 68Ga, 89Zr, 161Tb, 177Lu)</dc:subject>
<dc:subject xml:lang="en">Imaging</dc:subject>
<dc:subject xml:lang="en">Radiotherapy</dc:subject>
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<dcterms:abstract xml:lang="fr">L’objectif de cette thèse a été de synthétiser de nouveaux ligands octadentes puis deles étudier pour la chélation de radioéléments pouvant être employés pour l’imagerieTEP tels que le 44Sc, le 68Ga et le 89Zr mais aussi pour la radiothérapie bêta avec le161Tb et le 177Lu. Le premier ligand appelé PIPOH-Lys-DFO comporte quatre unités detype acide hydroxamique. Il a montré une grande efficacité pour la complexation du89Zr, comme l’ont confirmé les études de stabilité menées in vitro et in vivo. Ce liganda ensuite été conjugué au panitumumab, un anticorps monoclonal, afin de cibler lesrécepteurs EGFR dans un modèle murin de cancer du pancréas (souris nu/nu). Ledeuxième ligand appelé 3,4,3-LI(1,2-HOPO)-PEG3 comporte quant à lui quatre unitésde chélation de type hydroxypyridone. Il a été évalué avec succès in vitro et in vivoavec le 44Sc, le 89Zr, le 161Tb et le 177Lu. Ce ligand a été conjugué à l’anticorps D10pour cibler les PSMA dans un modèle de cancer de la prostate chez la souris (black 6).</dcterms:abstract>
<dcterms:abstract xml:lang="en">The objective of this thesis was to synthesize new octadentate ligands and then study them for the chelation of radioelements that can be used for PET imaging, such as 44Sc, 68Ga, and 89Zr, but also for beta radiotherapy with 161Tb and 177Lu. The first ligand, called PIPOH-Lys-DFO, contains four hydroxamic acid units. It showed high efficiency in complexing 89Zr, as confirmed by in vitro and in vivo stability studies. This ligand was then conjugated to panitumumab, a monoclonal antibody, to target EGFR receptors in a mouse model of pancreatic cancer (nu/nu mice). The second ligand, called 3,4,3-LI(1,2-HOPO)-PEG3, has four hydroxypyridone chelating units. It was successfully evaluated in vitro and in vivo with 44Sc, 89Zr, 161Tb, and 177Lu. This ligand was conjugated to the D10 antibody to target PSMA in a mouse model of prostate cancer (black 6).</dcterms:abstract>
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