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<dc:title xml:lang="fr">Développement de nouveaux antagonistes de RCPG pour le traitement des douleurs chroniques</dc:title>
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<dc:subject xml:lang="fr">Antagoniste Pharmacologique</dc:subject>
<dc:subject xml:lang="en">Chronic pain</dc:subject>
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<dc:subject xml:lang="en">PrRP receptor</dc:subject>
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<dcterms:abstract xml:lang="fr">Face aux limites des traitements de la douleur chronique, cette thèse vise le développement d'analgésiques non-opioïdes en ciblant le récepteur neuropeptidergique PrRPR. Partant d'un composé initial, une stratégie d'optimisation itérative par chimie médicinale a permis d'établir des relations structure-activité robustes. Ces travaux ont abouti à des antagonistes puissants de la cible, avec des affinités atteignant la gamme picomolaire. La preuve de concept a été établie in vivo, le composé phare démontrant une efficacité anti-hyperalgésique significative par voie orale dans des modèles précliniques de douleurs inflammatoire et neuropathique. L'étude a aussi révélé des défis translationnels majeurs, notamment un profil d'induction métabolique et une affinité parasite pour le canal hERG, liés à des motifs structuraux spécifiques. Des stratégies de conception rationnelle ont alors été validées pour mitiger ces risques, posant les bases solides pour le développement d'un candidat-médicament first-in-class.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Given the limitations of chronic pain treatments, this thesis aims to develop non-opioid analgesics by targeting the neuropeptidergic receptor PrRPR. Starting from an initial compound, an iterative optimization strategy through medicinal chemistry enabled the establishment of robust structure-activity relationships. This work resulted in potent antagonists of the target, with affinities reaching the picomolar range. Proof of concept was established in vivo, with the lead compound demonstrating significant anti-hyperalgesic efficacy via oral administration in preclinical models of inflammatory and neuropathic pain. The study also revealed major translational challenges, particularly a metabolic induction profile and off-target affinity for the hERG channel, linked to specific structural motifs. Rational design strategies were then validated to mitigate these risks, establishing solid foundations for the development of a first-in-class drug candidate.</dcterms:abstract>
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