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<dc:title xml:lang="en">Phosphoproteomic characterization of hepatitis B virus infection reveals a new role of collagen VI and Linker histone on fibrosis development and viral life cycle</dc:title>
<dcterms:alternative xml:lang="fr">L’analyse phospho-proteomique des cellules infectees par le VHB revele un nouveau role du collagene VI et de l’histone Linker dans la pathogenese du foie et le cycle de vie virale</dcterms:alternative>
<dc:subject xml:lang="fr">Virus de l’hépatite B</dc:subject>
<dc:subject xml:lang="fr">Voies de signalisations</dc:subject>
<dc:subject xml:lang="fr">ADNccc</dc:subject>
<dc:subject xml:lang="fr">Cellules étoilées hépatiques</dc:subject>
<dc:subject xml:lang="en">Hepatitis B virus</dc:subject>
<dc:subject xml:lang="en">Signal transduction</dc:subject>
<dc:subject xml:lang="en">Liver fibrosis</dc:subject>
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<dc:subject xml:lang="en">Hepatic stellate cells</dc:subject>
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<dcterms:abstract xml:lang="fr">L'hépatite B chronique est une des causes majeures des maladies du foie. L'éradication totale du virus de l’hépatite B (VHB) est difficilement réalisable en raison de la persistance de l'ADNccc. De plus, les antiviraux utilisés actuellement nécessitent un traitement à long terme et ne peuvent pas garantir une inversion de la fibrose hépatique. En conséquence, il est urgent de comprendre les voies de signalisation impliquées dans le cycle de vie viral et la pathogenèse hépatique. Ici, nous avons fourni un atlas protéomique et phosphoprotéomique complet des cellules infectées par le VHB qui a fortement mis en évidence une dérégulation des voies de signalisation impliquées dans le remodelage de la matrice extracellulaire et le contrôle du cycle cellulaire. Nous avons découvert un rôle proviral du collagène VI dans les hépatocytes qui, en outre, renforce l'activation des cellules étoilées hépatiques. De plus, nous avons montré une phosphorylation des histones de liason induite par le VHB dans la phase G1 du cycle cellulaire, qui a un impact spécifique sur la transcription du VHB, possiblement en rapport avec l'ADNccc. Ces résultats permettent de mieux comprendre les maladies hépatiques liées au VHB et peuvent contribuer à l'identification de nouvelles stratégies thérapeutiques.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Chronic hepatitis B virus (CHB) is the major cause of liver disease progression. Total eradication of the virus is hardly achieved due to cccDNA persistence. Moreover, the current antivirals require long-term treatment and cannot guarantee a reversal of liver fibrosis. Considering the lack of curative antiviral treatment, the understanding of the signaling pathways involved in the HBV life cycle and CHB liver pathogenesis is urgently needed. Here, we provided a comprehensive proteomic and phosphoproteomic atlas of the complete HBV viral cycle. Our atlas strongly highlighted a dysregulation of signaling pathways involved in extra-cellular matrix remodeling and cell cycle checkpoint. We uncovered a pro-viral role of collagen VI in hepatocytes which in addition reinforces the hepatic stellate cells activation. Moreover, we revealed an HBV-induced linker histone phosphorylation in the G1 phase of the cell cycle, which specifically impacts HBV transcription with link to cccDNA. These findings provide insights on HBV-related liver disease and may help in the identification of druggable targets for novel therapeutic strategies.</dcterms:abstract>
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