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<dc:title xml:lang="fr">Preventing the progression of NASH and liver cancer by discovering therapeutic targets using cell circuits of the circadian clock</dc:title>
<dcterms:alternative xml:lang="en">Prévenir la progression de NASH et du cancer de foie par la découverte du cibles thérapeutiques à l’aide des circuits cellulaires de l’horloge circadienne</dcterms:alternative>
<dc:subject xml:lang="fr">Horloge circadienne</dc:subject>
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<dc:subject xml:lang="fr">REV-ERBα</dc:subject>
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<dc:subject xml:lang="en">Circadian clock</dc:subject>
<dc:subject xml:lang="en">Chronic liver disease</dc:subject>
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<dcterms:abstract xml:lang="en">Liver fibrosis is the key risk factor for the hepatocellular carcinoma, a leading cause of cancer death world-wide. Approved anti-fibrotic therapies are absent and most compounds in clinical development have limited efficacy. The circadian clock (CC) is a major regulator of liver metabolism, but its role in the pathogenesis of liver fibrosis and as a potential therapeutic target is unknown. During my PhD studies, I showed that the liver hepatic CC-oscillator is temporally restricting (gating) TGF-β signaling, and that this regulation is lost in metabolic liver disease leading to constitutive expression of fibrotic genes. Mechanistic studies in primary human cells revealed a reciprocal relationship between increased TGF-β-driven fibrotic-signaling and CC, which were confirmed in patient-derived spheroid and in mice with liver disease. Remarkably, a pharmacological restoration of REV-ERBα activity markedly inhibited fibrosis in a humanized liver chimeric mouse model and spheroids-generated from fibrosis patients. In conclusion, I discovered that a functional CC prevents fibrosis and that targeting REV-ERBα is a novel concept for treating liver fibrosis-an important global unmet medical need.</dcterms:abstract>
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