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<dc:title xml:lang="en">Metallocarbenes for therapeutic applications</dc:title>
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<dc:subject xml:lang="fr">Complexes NHC (carbènes N-hétérocycliques)</dc:subject>
<dc:subject xml:lang="fr">Complexes de platine</dc:subject>
<dc:subject xml:lang="fr">Médicaments anticancéreux</dc:subject>
<dc:subject xml:lang="fr">Post-fonctionnalisation</dc:subject>
<dc:subject xml:lang="fr">Polyethylenimine</dc:subject>
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<dc:subject xml:lang="en">N-Heterocyclic carbene (NHC) complexes</dc:subject>
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<dc:subject xml:lang="en">Post-synthetic functionalization</dc:subject>
<dc:subject xml:lang="en">Polyethylenimine</dc:subject>
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<dcterms:abstract xml:lang="fr">Les complexes métalliques des carbènes N-hétérocycliques (NHC) présentent un grand potentiel comme anticancéreux. En particulier, des études in vitro ont confirmés une cytotoxicité supérieure au cisplatine. Dans ce travail, nous avons introduit de la diversité moléculaire à de nouveaux complexes NHC-Pt par coordination de différents ligands NHC. Une deuxième stratégie, la post-fonctionnalisation de complexes de Pt a été étudié par : a) formation d’oxime, notamment avec une urée ciblant le PSMA, b) échange de ligand avec des polyamines hydrosolubles (PEI) ou des pnictogènes (phosphines, arsines, stibines), c) échange d’halogène avec des isotopes de l’iode. Les propriétés cytotoxiques de ces composés ont été évaluées in vitro. In vivo (souris), un complexe PEI-Pt montre une inhibition tumorale similaire à l’oxaliplatine. Néanmoins, aucun effet secondaire n’a été détecté contrairement à l’oxaliplatine (hématomes). Ces résultats ouvrent de nouvelles perspectives dans le domaine des anticancéreux sur la base de platine.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Metal N-Heterocyclic Carbene (NHC) complexes are of great potential for cancer therapy. In particular, in vitro studies confirmed their significantly higher cytotoxicity than cisplatin. In this work, we introduced molecular diversity on new NHC-Pt complexes by coordination of various NHC precursors to platinum. As a second strategy, post-synthetic functionalization of Pt complexes has been fully investigated by: a) oxime formation, e.g. with a PSMA targeting urea derivative, b) ligand exchange reaction with hydrosoluble polyamines (PEI) and pnictogen-based ligands (phosphines, arsines, stibines), c) halogen exchange with iodide isotopesCytotoxic properties of these new compounds were evaluated in vitro. Best candidate was selected for in vivo evaluation on mice model showing for PEI-Pt similar tumour inhibition as oxaliplatin. Besides, no “visual” side effects were detected in contrast to oxaliplatin (hematomas). These outstanding results opened up new perspectives in the field of platinum-based drugs.</dcterms:abstract>
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