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<dc:title xml:lang="en">Regulation and function of the thyroid hormone nuclear receptor TRα1 in cancer stem cell biology of colon cancers</dc:title>
<dcterms:alternative xml:lang="fr">Régulation et fonction du récepteur nucléaire des hormones thyroïdiennes TRα1 dans la biologie des cellules souches cancéreuses des cancers coliques</dcterms:alternative>
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<dc:subject xml:lang="fr">Récepteur aux hormones thyroïdiennes alpha</dc:subject>
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<dc:subject xml:lang="en">Stem cells</dc:subject>
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<dc:subject xml:lang="en">Thyroid hormone receptor</dc:subject>
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<dcterms:abstract xml:lang="fr">L'hormone thyroïdienne T3 et son récepteur nucléaire TRα1 contrôlent le développement et l'homéostasie intestinale via une action sur les cellules souches (CS) des cryptes intestinales. Le potentiel translationnel des études en modèles murins a été démontré chez des patients atteints de cancer colorectal (CCR), car l’expression accrue de TRα1 dans le CCR corrèle avec l'activité de la voie signalétique Wnt et un potentiel « souche » augmenté. Cependant, les bases moléculaires responsables de la régulation de l’expression de TRα1 et l’impact de la T3 et de TRα1 dans les CS cancéreuses (CSC) des CCR dans le CCR n’étaient pas connus. Au cours de cette thèse, notre objectif était de : (1) Analyser les mécanismes qui contrôlent l’expression de TRα1 dans les CCR et les CSC.(2) Étudier la fonction de TRα1 dans la biologie des CSC, y compris leur maintenance, différenciation, et implication dans les mécanismes de chimiorésistance.</dcterms:abstract>
<dcterms:abstract xml:lang="en">The thyroid hormone T3 and its nuclear receptor TRα1 control gut development and homeostasis via an action on the intestinal crypt stem cells (SC). The translational potential of the studies in mouse models has been proved in human colorectal cancer (CRC) patients as the increased TRα1 expression in CRC correlates with the activity of the Wnt pathway and with an increased “stem” potential. However, the molecular bases responsible for TRα1 expression regulation and the impact of T3 and TRα1 on cancer SC (CSC) biology were unknown. During this thesis, we aimed to : (1) Analyse the mechanisms that control THRA gene expression in colon cancer and CSCs.(2) Study TRα1 in CSCs, including their maintenance, differentiation, and implication on drug resistance.</dcterms:abstract>
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