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<dc:title xml:lang="fr">Complexes de bispidine pour l'imagerie médicale</dc:title>
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<dc:subject xml:lang="fr">Bispidine</dc:subject>
<dc:subject xml:lang="fr">Manganèse</dc:subject>
<dc:subject xml:lang="fr">Terbium</dc:subject>
<dc:subject xml:lang="fr">IRM-redox</dc:subject>
<dc:subject xml:lang="fr">Immino-TEP</dc:subject>
<dc:subject xml:lang="en">Bispidine</dc:subject>
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<dc:subject xml:lang="en">Redox-MRI</dc:subject>
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<dcterms:abstract xml:lang="fr">Les bispidines sont une famille de composés hautement préorganisées et versatiles, pouvant complexer divers métaux et conduire à des complexes stables et inertes. Cette thèse décrit la synthèse et la caractérisation de complexes à base de bispidine pour une application en imagerie médicale. Leurs propriétés thermodynamiques, cinétiques, spectroscopiques, relaxométriques et redox ont été étudiées.Une première partie est axée sur de nouveaux ligands pour la complexation du manganèse(II/III). L’ion manganèse est un agent de contraste pour l’imagerie par résonance magnétique (IRM) dont l’efficacité peut être modulée en fonction de son état redox (II/III) en milieu biologique. Une deuxième partie se focalise sur la complexation du terbium(III) pour une application en tomographie par émission de positon (TEP). De par ses 4 isotopes radioactifs, le Tb(III) possède une polyvalence unique en tant que “couteau suisse” pour l’imagerie médicale, le théranostique et la radiothérapie. Ces travaux ont montré que bien que ces complexes possèdent une stabilité thermodynamique modeste, ils ont des cinétiques de formations rapides et de bonnes inerties cinétiques. Un premier complexe de Mn(III)-bispidine a pu être obtenu.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Bispidines are a family of highly pre-organized and versatile compounds that can complex various metals to form stable, inert complexes. This thesis describes the synthesis and characterization of bispidine-based complexes for an application to medical imaging. Their thermodynamic, kinetic, spectroscopic, relaxometric and redox properties were studied.The first part describes the synthesis of new ligands for the complexation of manganese(II/III) in order to develop redox probes for magnetic resonance imaging (MRI). The redox properties of manganese and its redox state can be modulated in a biological environment, leading to a variation of the contrast in MRI. The second part focuses on Terbium(III) complexation for use in positron emission tomography (PET). With its 4 radioactive isotopes, TbIII has unique versatility as a 'Swiss Army knife' for medical imaging, theranostic and radiotherapy.This work showed that although these complexes have modest thermodynamic stability, they have rapid formation kinetics and good kinetic inertness. A first Mn(III)-bispidine complex could be obtained.</dcterms:abstract>
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