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ED BIO SORBONNE PARIS CITE Proposition de sujet de thèse à l’appui d’une demande de contrat doctoral 2017-2018 Renseignements relatifs à l’Unité de Recherche : Label et intitulé : Hepacivirus et Immunité Innée Nom et prénom du Directeur : Eliane meurs Téléphone : 0145688777 Télécopie : 0145688943 Courriel: [email protected] Renseignements relatifs à l’Equipe : Nom de l’Equipe d’Accueil : Nom et prénom du responsable : Christine Neuveut Qualité du responsable : DR2 Inserm Téléphone : 0145688776 Télécopie :0145688943 Courriel :[email protected] Renseignements relatifs au sujet de thèse : Nom et prénom du Directeur de thèse (HDR) : Christine Neuveut Qualité : DR2 Inserm Téléphone : 0145688776 Télécopie : 0145688943 Courriel : [email protected] Titre du sujet proposé : Analyse quantitative des protéines cellulaires régulées par le virus de l'hépatite B au cours du temps Quantitative and temporal analysis of cellular proteins regulated by hepatitis B virus in primary human hepatocytes Département (cocher le département correspondant au sujet de thèse qui n’est pas obligatoirement le vôtre) : Biologie Cellulaire et moléculaire, Physiologie et Physiopathologie Immunologie Développement Génétique Neurobiologie et Vieillissement Infectiologie, Microbiologie Summary (5 lines maximum) : Hepatitis B virus (HBV) is one of the most important carcinogenic agents for human and chronic HBV carriers are at a 100-fold higher risk for developing hepatocellular carcinoma (HCC). Current treatments for chronic hepatitis B control cannot clear the virus implying a lifelong treatment of patients. There is thus an urgent need to understand mechanisms of HBV persistence. Using a multiplex proteomic approach we will identify cellular antiviral factors and study mechanisms of HBV evasion. Proposition de sujet de thèse à l’appui d’une demande de contrat doctoral 2017-2087 Nom, prénom du directeur de l'unité de recherche :Eliane Meurs Numéro de l'unité de recherche (et établissement de rattachement) : Institut Pasteur Nom, prénom du responsable de l'équipe d'accueil (EAD) :Christine Neuveut Nom, prénom du directeur de thèse : Christine Neuveut Titre du sujet de thèse proposé : Quantitative and temporal analysis of cellular proteins regulated by hepatitis B virus in primary human hepatocytes Citer 5 mots clés : hepatitis B virus, viral escape, restriction factor, quantitative proteomic, virushost interaction (key words) Candidat pressenti : OUI NON Contenu scientifique du programme de la thèse (en anglais) Chronic hepatitis B (CHB) virus infection represents a major health problem with about 250 million of chronically infected patients at high risk to develop severe liver diseases such as cirrhosis and hepatocellular carcinoma. CHB represents an area of high unmet medical need since, while current treatments control HBV infection and improve liver functions, they are unable to completely clear the virus. Viral persistence is due to the maintenance, in the nuclei of infected cells, of the cccDNA that is not targeted by the antiviral treatment and to the impairment of both the innate and adaptive immune responses that accompanies CHB infection. It is thus important to develop new drugs that could either target directly the viral replication or improve the host antiviral response. The aim of this project is to gain a comprehensive understanding of how HBV manipulates the host cell proteome during the course of infection. We aimed at identifying antiviral factors and understanding the mechanism of viral escape. Viral replication depends on a balance between factors that benefit and those that restrict viral infection. Using a quantitative temporal viromics approach developed by P. Lenher in Cambridge, we will perform a quantitative analysis of temporal changes in host and viral proteins in primary human hepatocytes through the course of HBV infection. We will in particular search for cellular factors involved in virus restriction and thus focus our analysis on cellular proteins downregulated by HBV that are likely to represent antiviral factor. We will study the mechanism of viral escape. Finally, we will examine whether the identified downregulated cellular proteins affect HBV virus replication, and determine the targeted step of the viral replication. Indiquez les cinq meilleures publications récentes de l’équipe : -Altınel,*, K. Hashimoto1,*,Y. Wei, C. Neuveut, I. Gupta, A.M.Suzuki, A. Dos Santos4, P. Moreau, T. Xia, SKojima, S. Kato; Y. Takikawa7, I Hidaka, M Shimizu, T Matsuura, A Tsubota, H Ikeda, S Nagoshi, H Suzuki,M-L Michel, D Samuel,M A Buendia, J Faivre, & P Carninci (2016). Single-nucleotideresolution mapping 1 of HBV promoters in infected human livers and hepatocellular carcinoma. J Virol Sep 28. pii: J. Virol .01625-16 -Rivière L., Gerossier L., Ducroux A., Dion S., Deng Q., Michel M.L. , Buendia M.A., Hantz O. and Neuveut C. (2015). HBx relieves chromatin-mediated transcriptional repression of hepatitis B viral cccDNA involving SETDB1 histone methyltransferase. J. Hepatol. doi: 10.1016/j.jhep.2015.06.023. -Ducroux A, Benhenda S, Rivière L, Semmes OJ, Benkirane M, Neuveut C. (2014). The Tudor domain protein Spindlin1 is involved in intrinsic antiviral defense against incoming hepatitis B Virus and herpes simplex virus type 1. PloS Pathog. 10 : e1004343. -Benhenda S., Ducroux A.,Rivière L., Sobhian B., Ward M., Dion S., Hantz O., Protzer U., Michel M.L., Benkirane M., Semmes O.J., Marie-Annick Buendia M.A. and Neuveut C. (2013). The PRMT1 methyltransferase is a binding partner of HBx and a negative regulator of hepatitis B virus transcription. J. Virol. : 87: 4360-4370. -Cougot D., Allemand E., Rivière L., Benhenda S., Duroure K., Levillayer L., Muchard C., Buendia M.A. and Neuveut C. (2012). Inhibition of PP1 phosphatase activity by HBx: a new mechanism for the activation of hepatitis B virus transcription. Sci. Signal.: Ra1.