1
|
Jühling F, Hamdane N, Crouchet E, Li S, El Saghire H, Mukherji A, Fujiwara N, Oudot MA, Thumann C, Saviano A, Roca Suarez AA, Goto K, Masia R, Sojoodi M, Arora G, Aikata H, Ono A, Tabrizian P, Schwartz M, Polyak SJ, Davidson I, Schmidl C, Bock C, Schuster C, Chayama K, Pessaux P, Tanabe KK, Hoshida Y, Zeisel MB, Duong FHT, Fuchs BC, Baumert TF. Targeting clinical epigenetic reprogramming for chemoprevention of metabolic and viral hepatocellular carcinoma. Gut 2021; 70:157-169. [PMID: 32217639 PMCID: PMC7116473 DOI: 10.1136/gutjnl-2019-318918] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 03/05/2020] [Accepted: 03/05/2020] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Hepatocellular carcinoma (HCC) is the fastest-growing cause of cancer-related mortality with chronic viral hepatitis and non-alcoholic steatohepatitis (NASH) as major aetiologies. Treatment options for HCC are unsatisfactory and chemopreventive approaches are absent. Chronic hepatitis C (CHC) results in epigenetic alterations driving HCC risk and persisting following cure. Here, we aimed to investigate epigenetic modifications as targets for liver cancer chemoprevention. DESIGN Liver tissues from patients with NASH and CHC were analysed by ChIP-Seq (H3K27ac) and RNA-Seq. The liver disease-specific epigenetic and transcriptional reprogramming in patients was modelled in a liver cell culture system. Perturbation studies combined with a targeted small molecule screen followed by in vivo and ex vivo validation were used to identify chromatin modifiers and readers for HCC chemoprevention. RESULTS In patients, CHC and NASH share similar epigenetic and transcriptomic modifications driving cancer risk. Using a cell-based system modelling epigenetic modifications in patients, we identified chromatin readers as targets to revert liver gene transcription driving clinical HCC risk. Proof-of-concept studies in a NASH-HCC mouse model showed that the pharmacological inhibition of chromatin reader bromodomain 4 inhibited liver disease progression and hepatocarcinogenesis by restoring transcriptional reprogramming of the genes that were epigenetically altered in patients. CONCLUSION Our results unravel the functional relevance of metabolic and virus-induced epigenetic alterations for pathogenesis of HCC development and identify chromatin readers as targets for chemoprevention in patients with chronic liver diseases.
Collapse
Affiliation(s)
- Frank Jühling
- Université de Strasbourg, Strasbourg, France,Inserm, U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France
| | - Nourdine Hamdane
- Université de Strasbourg, Strasbourg, France,Inserm, U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France
| | - Emilie Crouchet
- Université de Strasbourg, Strasbourg, France,Inserm, U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France
| | - Shen Li
- Division of Surgical Oncology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Houssein El Saghire
- Université de Strasbourg, Strasbourg, France,Inserm, U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France
| | - Atish Mukherji
- Université de Strasbourg, Strasbourg, France,Inserm, U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France
| | - Naoto Fujiwara
- Liver Tumor Translational Research Program, Harold C. Simmons Comprehensive Cancer Center, Division of Digestive and Liver Diseases, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Marine A Oudot
- Université de Strasbourg, Strasbourg, France,Inserm, U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France
| | - Christine Thumann
- Université de Strasbourg, Strasbourg, France,Inserm, U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France
| | - Antonio Saviano
- Université de Strasbourg, Strasbourg, France,Inserm, U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France,Institut Hospitalo-Universitaire, Pôle Hépato-digestif, Nouvel Hôpital Civil, Strasbourg, France
| | - Armando Andres Roca Suarez
- Université de Strasbourg, Strasbourg, France,Inserm, U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France
| | - Kaku Goto
- Université de Strasbourg, Strasbourg, France,Inserm, U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France
| | - Ricard Masia
- Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Mozhdeh Sojoodi
- Division of Surgical Oncology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Gunisha Arora
- Division of Surgical Oncology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Hiroshi Aikata
- Department of Gastroenterology and Metabolism, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Atsushi Ono
- Liver Tumor Translational Research Program, Harold C. Simmons Comprehensive Cancer Center, Division of Digestive and Liver Diseases, University of Texas Southwestern Medical Center, Dallas, Texas, USA,Department of Gastroenterology and Metabolism, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Parissa Tabrizian
- Recanati/Miller Transplantation Institute, Mount Sinai Medical Center, New York, New York, USA
| | - Myron Schwartz
- Recanati/Miller Transplantation Institute, Mount Sinai Medical Center, New York, New York, USA
| | - Stephen J Polyak
- Department of Global Health, University of Washington, Seattle, Washington, USA,Department of Laboratory Medicine, University of Washington, Seattle, Washington, USA
| | - Irwin Davidson
- Department of Functional Genomics and Cancer, Institut de Génétique et de Biologie Moléculaire et Cellulaire, CNRS/INSERM/UDS, Illkirch, France
| | - Christian Schmidl
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria,Regensburg Centre for Interventional Immunology (RCI), Regensburg, Germany
| | - Christoph Bock
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria,Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria
| | - Catherine Schuster
- Université de Strasbourg, Strasbourg, France,Inserm, U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France
| | - Kazuaki Chayama
- Department of Gastroenterology and Metabolism, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Patrick Pessaux
- Université de Strasbourg, Strasbourg, France,Inserm, U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France,Institut Hospitalo-Universitaire, Pôle Hépato-digestif, Nouvel Hôpital Civil, Strasbourg, France
| | - Kenneth K Tanabe
- Division of Surgical Oncology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Yujin Hoshida
- Liver Tumor Translational Research Program, Harold C. Simmons Comprehensive Cancer Center, Division of Digestive and Liver Diseases, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Mirjam B Zeisel
- Université de Strasbourg, Strasbourg, France,Inserm, U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France,Inserm U1052, CNRS UMR 5286, Centre Léon Bérard, Cancer Research Center of Lyon (CRCL), Université de Lyon (UCBL), Lyon, France
| | - François HT Duong
- Université de Strasbourg, Strasbourg, France,Inserm, U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France
| | - Bryan C Fuchs
- Division of Surgical Oncology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Thomas F Baumert
- Université de Strasbourg, Strasbourg, France .,Inserm, U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France.,Institut Hospitalo-Universitaire, Pôle Hépato-digestif, Nouvel Hôpital Civil, Strasbourg, France.,Institut Universitaire de France (IUF), Paris, France
| |
Collapse
|
2
|
Lupberger J, Croonenborghs T, Roca Suarez AA, Van Renne N, Jühling F, Oudot MA, Virzì A, Bandiera S, Jamey C, Meszaros G, Brumaru D, Mukherji A, Durand SC, Heydmann L, Verrier ER, El Saghire H, Hamdane N, Bartenschlager R, Fereshetian S, Ramberger E, Sinha R, Nabian M, Everaert C, Jovanovic M, Mertins P, Carr SA, Chayama K, Dali-Youcef N, Ricci R, Bardeesy NM, Fujiwara N, Gevaert O, Zeisel MB, Hoshida Y, Pochet N, Baumert TF. Combined Analysis of Metabolomes, Proteomes, and Transcriptomes of Hepatitis C Virus-Infected Cells and Liver to Identify Pathways Associated With Disease Development. Gastroenterology 2019; 157:537-551.e9. [PMID: 30978357 PMCID: PMC8318381 DOI: 10.1053/j.gastro.2019.04.003] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 03/01/2019] [Accepted: 04/04/2019] [Indexed: 02/07/2023]
Abstract
BACKGROUND & AIMS The mechanisms of hepatitis C virus (HCV) infection, liver disease progression, and hepatocarcinogenesis are only partially understood. We performed genomic, proteomic, and metabolomic analyses of HCV-infected cells and chimeric mice to learn more about these processes. METHODS Huh7.5.1dif (hepatocyte-like cells) were infected with culture-derived HCV and used in RNA sequencing, proteomic, metabolomic, and integrative genomic analyses. uPA/SCID (urokinase-type plasminogen activator/severe combined immunodeficiency) mice were injected with serum from HCV-infected patients; 8 weeks later, liver tissues were collected and analyzed by RNA sequencing and proteomics. Using differential expression, gene set enrichment analyses, and protein interaction mapping, we identified pathways that changed in response to HCV infection. We validated our findings in studies of liver tissues from 216 patients with HCV infection and early-stage cirrhosis and paired biopsy specimens from 99 patients with hepatocellular carcinoma, including 17 patients with histologic features of steatohepatitis. Cirrhotic liver tissues from patients with HCV infection were classified into 2 groups based on relative peroxisome function; outcomes assessed included Child-Pugh class, development of hepatocellular carcinoma, survival, and steatohepatitis. Hepatocellular carcinomas were classified according to steatohepatitis; the outcome was relative peroxisomal function. RESULTS We quantified 21,950 messenger RNAs (mRNAs) and 8297 proteins in HCV-infected cells. Upon HCV infection of hepatocyte-like cells and chimeric mice, we observed significant changes in levels of mRNAs and proteins involved in metabolism and hepatocarcinogenesis. HCV infection of hepatocyte-like cells significantly increased levels of the mRNAs, but not proteins, that regulate the innate immune response; we believe this was due to the inhibition of translation in these cells. HCV infection of hepatocyte-like cells increased glucose consumption and metabolism and the STAT3 signaling pathway and reduced peroxisome function. Peroxisomes mediate β-oxidation of very long-chain fatty acids; we found intracellular accumulation of very long-chain fatty acids in HCV-infected cells, which is also observed in patients with fatty liver disease. Cells in livers from HCV-infected mice had significant reductions in levels of the mRNAs and proteins associated with peroxisome function, indicating perturbation of peroxisomes. We found that defects in peroxisome function were associated with outcomes and features of HCV-associated cirrhosis, fatty liver disease, and hepatocellular carcinoma in patients. CONCLUSIONS We performed combined transcriptome, proteome, and metabolome analyses of liver tissues from HCV-infected hepatocyte-like cells and HCV-infected mice. We found that HCV infection increases glucose metabolism and the STAT3 signaling pathway and thereby reduces peroxisome function; alterations in the expression levels of peroxisome genes were associated with outcomes of patients with liver diseases. These findings provide insights into liver disease pathogenesis and might be used to identify new therapeutic targets.
Collapse
Affiliation(s)
- Joachim Lupberger
- Institut National de la Santé et de la Recherche Médicale, Institut de Recherche sur les Maladies Virales et Hépatiques, Université de Strasbourg (IVH), Strasbourg, France; Université de Strasbourg, Strasbourg, France.
| | - Tom Croonenborghs
- Department of Neurology, Harvard Medical School, Boston, Massachusetts; Cell Circuits Program, Broad Institute of MIT and Harvard, Cambridge, Massachusetts; Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Boston, Massachusetts
| | - Armando Andres Roca Suarez
- Institut National de la Santé et de la Recherche Médicale, Institut de Recherche sur les Maladies Virales et Hépatiques, Université de Strasbourg (IVH), Strasbourg, France; Université de Strasbourg, Strasbourg, France
| | - Nicolaas Van Renne
- Institut National de la Santé et de la Recherche Médicale, Institut de Recherche sur les Maladies Virales et Hépatiques, Université de Strasbourg (IVH), Strasbourg, France; Université de Strasbourg, Strasbourg, France
| | - Frank Jühling
- Institut National de la Santé et de la Recherche Médicale, Institut de Recherche sur les Maladies Virales et Hépatiques, Université de Strasbourg (IVH), Strasbourg, France; Université de Strasbourg, Strasbourg, France
| | - Marine A Oudot
- Institut National de la Santé et de la Recherche Médicale, Institut de Recherche sur les Maladies Virales et Hépatiques, Université de Strasbourg (IVH), Strasbourg, France; Université de Strasbourg, Strasbourg, France
| | - Alessia Virzì
- Institut National de la Santé et de la Recherche Médicale, Institut de Recherche sur les Maladies Virales et Hépatiques, Université de Strasbourg (IVH), Strasbourg, France; Université de Strasbourg, Strasbourg, France
| | - Simonetta Bandiera
- Institut National de la Santé et de la Recherche Médicale, Institut de Recherche sur les Maladies Virales et Hépatiques, Université de Strasbourg (IVH), Strasbourg, France; Université de Strasbourg, Strasbourg, France
| | - Carole Jamey
- Université de Strasbourg, Strasbourg, France; Laboratoire de Biochimie et de Biologie Moléculaire, Pôle de biologie, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Gergö Meszaros
- Université de Strasbourg, Strasbourg, France; Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France; Centre National de la Recherche Scientifique, Illkirch, France; Institut National de la Santé et de la Recherche Médicale, Illkirch, France
| | - Daniel Brumaru
- Université de Strasbourg, Strasbourg, France; Laboratoire de Biochimie et de Biologie Moléculaire, Pôle de biologie, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Atish Mukherji
- Institut National de la Santé et de la Recherche Médicale, Institut de Recherche sur les Maladies Virales et Hépatiques, Université de Strasbourg (IVH), Strasbourg, France; Université de Strasbourg, Strasbourg, France
| | - Sarah C Durand
- Institut National de la Santé et de la Recherche Médicale, Institut de Recherche sur les Maladies Virales et Hépatiques, Université de Strasbourg (IVH), Strasbourg, France; Université de Strasbourg, Strasbourg, France
| | - Laura Heydmann
- Institut National de la Santé et de la Recherche Médicale, Institut de Recherche sur les Maladies Virales et Hépatiques, Université de Strasbourg (IVH), Strasbourg, France; Université de Strasbourg, Strasbourg, France
| | - Eloi R Verrier
- Institut National de la Santé et de la Recherche Médicale, Institut de Recherche sur les Maladies Virales et Hépatiques, Université de Strasbourg (IVH), Strasbourg, France; Université de Strasbourg, Strasbourg, France
| | - Hussein El Saghire
- Institut National de la Santé et de la Recherche Médicale, Institut de Recherche sur les Maladies Virales et Hépatiques, Université de Strasbourg (IVH), Strasbourg, France; Université de Strasbourg, Strasbourg, France
| | - Nourdine Hamdane
- Institut National de la Santé et de la Recherche Médicale, Institut de Recherche sur les Maladies Virales et Hépatiques, Université de Strasbourg (IVH), Strasbourg, France; Université de Strasbourg, Strasbourg, France
| | - Ralf Bartenschlager
- Department of Infectious Diseases, Molecular Virology, Heidelberg University, Heidelberg, Germany; Division of Virus-Associated Carcinogenesis, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Shaunt Fereshetian
- The Broad Institute of Massachusetts Institute of Technology and Harvard, Cambridge, Massachusetts
| | - Evelyn Ramberger
- Proteomics Platform, Max Delbrück Center for Molecular Medicine in the Helmholtz Society, Berlin, Germany; Berlin Institute of Health, Berlin, Germany
| | - Rileen Sinha
- Department of Neurology, Harvard Medical School, Boston, Massachusetts; Cell Circuits Program, Broad Institute of MIT and Harvard, Cambridge, Massachusetts; Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Boston, Massachusetts
| | - Mohsen Nabian
- Department of Neurology, Harvard Medical School, Boston, Massachusetts; Cell Circuits Program, Broad Institute of MIT and Harvard, Cambridge, Massachusetts; Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Boston, Massachusetts
| | - Celine Everaert
- Department of Neurology, Harvard Medical School, Boston, Massachusetts; Cell Circuits Program, Broad Institute of MIT and Harvard, Cambridge, Massachusetts; Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Boston, Massachusetts
| | - Marko Jovanovic
- The Broad Institute of Massachusetts Institute of Technology and Harvard, Cambridge, Massachusetts; Department of Biological Sciences, Columbia University, New York, New York
| | - Philipp Mertins
- The Broad Institute of Massachusetts Institute of Technology and Harvard, Cambridge, Massachusetts; Proteomics Platform, Max Delbrück Center for Molecular Medicine in the Helmholtz Society, Berlin, Germany; Berlin Institute of Health, Berlin, Germany
| | - Steven A Carr
- The Broad Institute of Massachusetts Institute of Technology and Harvard, Cambridge, Massachusetts
| | - Kazuaki Chayama
- Department of Gastroenterology and Metabolism, Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan; Liver Research Project Center, Hiroshima University, Hiroshima, Japan
| | - Nassim Dali-Youcef
- Université de Strasbourg, Strasbourg, France; Laboratoire de Biochimie et de Biologie Moléculaire, Pôle de biologie, Hôpitaux Universitaires de Strasbourg, Strasbourg, France; Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France; Centre National de la Recherche Scientifique, Illkirch, France; Institut National de la Santé et de la Recherche Médicale, Illkirch, France
| | - Romeo Ricci
- Université de Strasbourg, Strasbourg, France; Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France; Centre National de la Recherche Scientifique, Illkirch, France; Institut National de la Santé et de la Recherche Médicale, Illkirch, France
| | | | - Naoto Fujiwara
- Liver Tumor Translational Research Program, Simmons Comprehensive Cancer Center, Division of Digestive and Liver Diseases, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Olivier Gevaert
- Cell Circuits Program, Broad Institute of MIT and Harvard, Cambridge, Massachusetts; Stanford Center for Biomedical Informatics Research, Department of Medicine and Biomedical Data Science, Stanford University, Stanford, California
| | - Mirjam B Zeisel
- Institut National de la Santé et de la Recherche Médicale, Institut de Recherche sur les Maladies Virales et Hépatiques, Université de Strasbourg (IVH), Strasbourg, France; Université de Strasbourg, Strasbourg, France
| | - Yujin Hoshida
- Liver Tumor Translational Research Program, Simmons Comprehensive Cancer Center, Division of Digestive and Liver Diseases, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Nathalie Pochet
- Department of Neurology, Harvard Medical School, Boston, Massachusetts; Cell Circuits Program, Broad Institute of MIT and Harvard, Cambridge, Massachusetts; Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Boston, Massachusetts.
| | - Thomas F Baumert
- Institut National de la Santé et de la Recherche Médicale, Institut de Recherche sur les Maladies Virales et Hépatiques, Université de Strasbourg (IVH), Strasbourg, France; Université de Strasbourg, Strasbourg, France; Pôle Hépato-digestif, Institut Hopitalo-Universitaire, Strasbourg, France.
| |
Collapse
|
3
|
Hamdane N, Jühling F, Crouchet E, El Saghire H, Thumann C, Oudot MA, Bandiera S, Saviano A, Ponsolles C, Suarez AAR, Li S, Fujiwara N, Ono A, Davidson I, Bardeesy N, Schmidl C, Bock C, Schuster C, Lupberger J, Habersetzer F, Doffoël M, Piardi T, Sommacale D, Imamura M, Uchida T, Ohdan H, Aikata H, Chayama K, Boldanova T, Pessaux P, Fuchs BC, Hoshida Y, Zeisel MB, Duong FHT, Baumert TF. HCV-Induced Epigenetic Changes Associated With Liver Cancer Risk Persist After Sustained Virologic Response. Gastroenterology 2019; 156:2313-2329.e7. [PMID: 30836093 PMCID: PMC8756817 DOI: 10.1053/j.gastro.2019.02.038] [Citation(s) in RCA: 164] [Impact Index Per Article: 32.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 02/14/2019] [Accepted: 02/27/2019] [Indexed: 12/12/2022]
Abstract
BACKGROUND & AIMS Chronic hepatitis C virus (HCV) infection is an important risk factor for hepatocellular carcinoma (HCC). Despite effective antiviral therapies, the risk for HCC is decreased but not eliminated after a sustained virologic response (SVR) to direct-acting antiviral (DAA) agents, and the risk is higher in patients with advanced fibrosis. We investigated HCV-induced epigenetic alterations that might affect risk for HCC after DAA treatment in patients and mice with humanized livers. METHODS We performed genome-wide ChIPmentation-based ChIP-Seq and RNA-seq analyses of liver tissues from 6 patients without HCV infection (controls), 18 patients with chronic HCV infection, 8 patients with chronic HCV infection cured by DAA treatment, 13 patients with chronic HCV infection cured by interferon therapy, 4 patients with chronic hepatitis B virus infection, and 7 patients with nonalcoholic steatohepatitis in Europe and Japan. HCV-induced epigenetic modifications were mapped by comparative analyses with modifications associated with other liver disease etiologies. uPA/SCID mice were engrafted with human hepatocytes to create mice with humanized livers and given injections of HCV-infected serum samples from patients; mice were given DAAs to eradicate the virus. Pathways associated with HCC risk were identified by integrative pathway analyses and validated in analyses of paired HCC tissues from 8 patients with an SVR to DAA treatment of HCV infection. RESULTS We found chronic HCV infection to induce specific genome-wide changes in H3K27ac, which correlated with changes in expression of mRNAs and proteins. These changes persisted after an SVR to DAAs or interferon-based therapies. Integrative pathway analyses of liver tissues from patients and mice with humanized livers demonstrated that HCV-induced epigenetic alterations were associated with liver cancer risk. Computational analyses associated increased expression of SPHK1 with HCC risk. We validated these findings in an independent cohort of patients with HCV-related cirrhosis (n = 216), a subset of which (n = 21) achieved viral clearance. CONCLUSIONS In an analysis of liver tissues from patients with and without an SVR to DAA therapy, we identified epigenetic and gene expression alterations associated with risk for HCC. These alterations might be targeted to prevent liver cancer in patients treated for HCV infection.
Collapse
Affiliation(s)
- Nourdine Hamdane
- INSERM U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France,Université de Strasbourg, Strasbourg, France
| | - Frank Jühling
- INSERM U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France,Université de Strasbourg, Strasbourg, France
| | - Emilie Crouchet
- INSERM U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France,Université de Strasbourg, Strasbourg, France
| | - Houssein El Saghire
- INSERM U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France,Université de Strasbourg, Strasbourg, France
| | - Christine Thumann
- INSERM U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France,Université de Strasbourg, Strasbourg, France
| | - Marine A. Oudot
- INSERM U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France,Université de Strasbourg, Strasbourg, France
| | - Simonetta Bandiera
- INSERM U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France,Université de Strasbourg, Strasbourg, France
| | - Antonio Saviano
- INSERM U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France,Université de Strasbourg, Strasbourg, France,Institut Hospitalo-Universitaire, Pôle Hépato-digestif, Nouvel Hôpital Civil, Strasbourg, France
| | - Clara Ponsolles
- INSERM U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France,Université de Strasbourg, Strasbourg, France
| | - Armando Andres Roca Suarez
- INSERM U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France,Université de Strasbourg, Strasbourg, France
| | - Shen Li
- Division of Surgical Oncology, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, Massachusetts
| | - Naoto Fujiwara
- Liver Tumor Translational Research Program, Harold C. Simmons Comprehensive Cancer Center, Division of Digestive and Liver Diseases, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Atsushi Ono
- Liver Tumor Translational Research Program, Harold C. Simmons Comprehensive Cancer Center, Division of Digestive and Liver Diseases, University of Texas Southwestern Medical Center, Dallas, Texas,Department of Gastroenterology and Metabolism, Applied Life Sciences, Institute of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan,Department of Gastroenterological and Transplant Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Irwin Davidson
- Department of Functional Genomics and Cancer, Institut de Génétique et de Biologie Moléculaire et Cellulaire, CNRS/INSERM/UDS, Illkirch, France
| | - Nabeel Bardeesy
- Center for Cancer Research, Massachusetts General Hospital; Departments of Medicine, Harvard Medical School, Boston, Massachusetts
| | - Christian Schmidl
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria,Regensburg Centre for Interventional Immunology (RCI) and University Medical Center of Regensburg, Regensburg, Germany
| | - Christoph Bock
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria,Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria,Max Planck Institute for Informatics, Saarbrücken, Germany
| | - Catherine Schuster
- INSERM U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France,Université de Strasbourg, Strasbourg, France
| | - Joachim Lupberger
- INSERM U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France,Université de Strasbourg, Strasbourg, France
| | - François Habersetzer
- INSERM U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France,Institut Hospitalo-Universitaire, Pôle Hépato-digestif, Nouvel Hôpital Civil, Strasbourg, France
| | - Michel Doffoël
- Institut Hospitalo-Universitaire, Pôle Hépato-digestif, Nouvel Hôpital Civil, Strasbourg, France
| | - Tullio Piardi
- General, Digestive, and Endocrine Surgery Unit, Hôpital Robert Debré, Centre Hospitalier Universitaire de Reims, Université de Reims Champagne-Ardenne, Reims, France
| | - Daniele Sommacale
- General, Digestive, and Endocrine Surgery Unit, Hôpital Robert Debré, Centre Hospitalier Universitaire de Reims, Université de Reims Champagne-Ardenne, Reims, France
| | - Michio Imamura
- Department of Gastroenterology and Metabolism, Applied Life Sciences, Institute of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Takuro Uchida
- Department of Gastroenterology and Metabolism, Applied Life Sciences, Institute of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Hideki Ohdan
- Department of Gastroenterological and Transplant Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Hiroshi Aikata
- Department of Gastroenterology and Metabolism, Applied Life Sciences, Institute of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Kazuaki Chayama
- Department of Gastroenterology and Metabolism, Applied Life Sciences, Institute of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Tujana Boldanova
- Department of Biomedicine, University Hospital Basel, University of Basel, Basel, Switzerland,Division of Gastroenterology and Hepatology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Patrick Pessaux
- INSERM U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France,Institut Hospitalo-Universitaire, Pôle Hépato-digestif, Nouvel Hôpital Civil, Strasbourg, France
| | - Bryan C. Fuchs
- Division of Surgical Oncology, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, Massachusetts
| | - Yujin Hoshida
- Liver Tumor Translational Research Program, Harold C. Simmons Comprehensive Cancer Center, Division of Digestive and Liver Diseases, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Mirjam B. Zeisel
- INSERM U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France,Université de Strasbourg, Strasbourg, France,INSERM U1052, CNRS UMR 5286, Cancer Research Center of Lyon (CRCL), Université de Lyon (UCBL), Lyon, France
| | - François H. T. Duong
- INSERM U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France,Université de Strasbourg, Strasbourg, France,Department of Biomedicine, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Thomas F. Baumert
- INSERM U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France,Université de Strasbourg, Strasbourg, France,Institut Hospitalo-Universitaire, Pôle Hépato-digestif, Nouvel Hôpital Civil, Strasbourg, France,Institut Universitaire de France (IUF), Paris, France
| |
Collapse
|
4
|
Hamdane N, Baumert TF, Zeisel MB. [Risk of hepatocellular carcinoma after hepatitis C virus cure with direct-acting antivirals: the next challenges]. Med Sci (Paris) 2018; 34:391-394. [PMID: 29900836 DOI: 10.1051/medsci/20183405007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Affiliation(s)
- Nourdine Hamdane
- Inserm U1110, institut de recherche sur les maladies virales et hépatiques, 3, rue Koeberlé, 67000 Strasbourg, France - Université de Strasbourg, 67000 Strasbourg, France
| | - Thomas F Baumert
- Inserm U1110, institut de recherche sur les maladies virales et hépatiques, 3, rue Koeberlé, 67000 Strasbourg, France - Université de Strasbourg, 67000 Strasbourg, France - Institut hospitalo-universitaire, pôle hépato-digestif, nouvel hôpital civil, 67000 Strasbourg, France
| | - Mirjam B Zeisel
- Inserm U1052, CNRS UMR 5286, centre de recherche sur le cancer de Lyon (CRCL), université de Lyon (UCBL), 151, cours Albert Thomas, 69424 Lyon, France
| |
Collapse
|
5
|
Hamdane N, Tremblay MG, Dillinger S, Stefanovsky VY, Németh A, Moss T. Disruption of the UBF gene induces aberrant somatic nucleolar bodies and disrupts embryo nucleolar precursor bodies. Gene 2017; 612:5-11. [DOI: 10.1016/j.gene.2016.09.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 09/02/2016] [Accepted: 09/06/2016] [Indexed: 11/30/2022]
|
6
|
Hamdane N, Herdman C, Mars JC, Stefanovsky V, Tremblay MG, Moss T. Depletion of the cisplatin targeted HMGB-box factor UBF selectively induces p53-independent apoptotic death in transformed cells. Oncotarget 2016; 6:27519-36. [PMID: 26317157 PMCID: PMC4695006 DOI: 10.18632/oncotarget.4823] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Accepted: 07/27/2015] [Indexed: 11/29/2022] Open
Abstract
Cisplatin-DNA adducts act as strong decoys for the Upstream Binding Factor UBF (UBTF) and have been shown to inhibit transcription of the ribosomal RNA genes by RNA polymerase I. However, it is unclear if this plays a significant role in the chemotherapeutic activity of cis- or carboplatin. We find that cisplatin in fact induces a very rapid displacement of UBF from the ribosomal RNA genes and strong inhibition of ribosomal RNA synthesis, consistent with this being an important factor in its cytotoxicity. Using conditional gene deletion, we recently showed that UBF is an essential factor for transcription of the ribosomal RNA genes and for ribosome biogenesis. We now show that loss of UBF arrests cell proliferation and induces fully penetrant, rapid and synchronous apoptosis, as well as nuclear disruption and cell death, specifically in cells subjected to oncogenic stress. Apoptosis is not affected by homozygous deletion of the p53 gene and occurs equally in cells transformed by SV40 T antigens, by Myc or by a combination of Ras & Myc oncogenes. The data strongly argue that inhibition of UBF function is a major factor in the cytotoxicity of cisplatin. Hence, drug targeting of UBF may be a preferable approach to the use of the highly toxic platins in cancer therapy.
Collapse
Affiliation(s)
- Nourdine Hamdane
- Laboratory of Growth and Development, St-Patrick Research Group in Basic Oncology, Cancer Division of the Quebec University Hospital Research Centre, Québec, QC, Canada.,Department of Molecular Biology, Medical Biochemistry and Pathology, Faculty of Medicine, Laval University, Québec, QC, Canada.,Present address: Inserm, U1110, Institute of Viral and Liver Diseases, Strasbourg, France
| | - Chelsea Herdman
- Laboratory of Growth and Development, St-Patrick Research Group in Basic Oncology, Cancer Division of the Quebec University Hospital Research Centre, Québec, QC, Canada.,Department of Molecular Biology, Medical Biochemistry and Pathology, Faculty of Medicine, Laval University, Québec, QC, Canada
| | - Jean-Clement Mars
- Laboratory of Growth and Development, St-Patrick Research Group in Basic Oncology, Cancer Division of the Quebec University Hospital Research Centre, Québec, QC, Canada.,Department of Molecular Biology, Medical Biochemistry and Pathology, Faculty of Medicine, Laval University, Québec, QC, Canada
| | - Victor Stefanovsky
- Laboratory of Growth and Development, St-Patrick Research Group in Basic Oncology, Cancer Division of the Quebec University Hospital Research Centre, Québec, QC, Canada
| | - Michel G Tremblay
- Laboratory of Growth and Development, St-Patrick Research Group in Basic Oncology, Cancer Division of the Quebec University Hospital Research Centre, Québec, QC, Canada
| | - Tom Moss
- Laboratory of Growth and Development, St-Patrick Research Group in Basic Oncology, Cancer Division of the Quebec University Hospital Research Centre, Québec, QC, Canada.,Department of Molecular Biology, Medical Biochemistry and Pathology, Faculty of Medicine, Laval University, Québec, QC, Canada
| |
Collapse
|
7
|
Sanij E, Diesch J, Lesmana A, Poortinga G, Hein N, Lidgerwood G, Cameron DP, Ellul J, Goodall GJ, Wong LH, Dhillon AS, Hamdane N, Rothblum LI, Pearson RB, Haviv I, Moss T, Hannan RD. A novel role for the Pol I transcription factor UBTF in maintaining genome stability through the regulation of highly transcribed Pol II genes. Genome Res 2015; 25:201-12. [PMID: 25452314 PMCID: PMC4315294 DOI: 10.1101/gr.176115.114] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Accepted: 11/26/2014] [Indexed: 12/21/2022]
Abstract
Mechanisms to coordinate programs of highly transcribed genes required for cellular homeostasis and growth are unclear. Upstream binding transcription factor (UBTF, also called UBF) is thought to function exclusively in RNA polymerase I (Pol I)-specific transcription of the ribosomal genes. Here, we report that the two isoforms of UBTF (UBTF1/2) are also enriched at highly expressed Pol II-transcribed genes throughout the mouse genome. Further analysis of UBTF1/2 DNA binding in immortalized human epithelial cells and their isogenically matched transformed counterparts reveals an additional repertoire of UBTF1/2-bound genes involved in the regulation of cell cycle checkpoints and DNA damage response. As proof of a functional role for UBTF1/2 in regulating Pol II transcription, we demonstrate that UBTF1/2 is required for recruiting Pol II to the highly transcribed histone gene clusters and for their optimal expression. Intriguingly, lack of UBTF1/2 does not affect chromatin marks or nucleosome density at histone genes. Instead, it results in increased accessibility of the histone promoters and transcribed regions to micrococcal nuclease, implicating UBTF1/2 in mediating DNA accessibility. Unexpectedly, UBTF2, which does not function in Pol I transcription, is sufficient to regulate histone gene expression in the absence of UBTF1. Moreover, depletion of UBTF1/2 and subsequent reduction in histone gene expression is associated with DNA damage and genomic instability independent of Pol I transcription. Thus, we have uncovered a novel role for UBTF1 and UBTF2 in maintaining genome stability through coordinating the expression of highly transcribed Pol I (UBTF1 activity) and Pol II genes (UBTF2 activity).
Collapse
Affiliation(s)
- Elaine Sanij
- Research Division, Peter MacCallum Cancer Centre, East Melbourne, Victoria 3002, Australia; Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, Victoria 3010, Australia; Department of Pathology, University of Melbourne, Parkville, Victoria 3010, Australia;
| | - Jeannine Diesch
- Research Division, Peter MacCallum Cancer Centre, East Melbourne, Victoria 3002, Australia; Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Analia Lesmana
- Research Division, Peter MacCallum Cancer Centre, East Melbourne, Victoria 3002, Australia; Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Gretchen Poortinga
- Research Division, Peter MacCallum Cancer Centre, East Melbourne, Victoria 3002, Australia; Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, Victoria 3010, Australia; Department of Medicine, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Nadine Hein
- Research Division, Peter MacCallum Cancer Centre, East Melbourne, Victoria 3002, Australia; Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Grace Lidgerwood
- Research Division, Peter MacCallum Cancer Centre, East Melbourne, Victoria 3002, Australia
| | - Donald P Cameron
- Research Division, Peter MacCallum Cancer Centre, East Melbourne, Victoria 3002, Australia; Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Jason Ellul
- Research Division, Peter MacCallum Cancer Centre, East Melbourne, Victoria 3002, Australia; Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Gregory J Goodall
- Centre for Cancer Biology, SA Pathology and University of South Australia, Adelaide, South Australia 5000, Australia; Discipline of Medicine, The University of Adelaide, Adelaide, South Australia 5005, Australia; School of Molecular and Biomedical Science, The University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Lee H Wong
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, Victoria 3800, Australia
| | - Amardeep S Dhillon
- Research Division, Peter MacCallum Cancer Centre, East Melbourne, Victoria 3002, Australia; Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, Victoria 3010, Australia; Department of Pathology, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Nourdine Hamdane
- Department of Molecular Biology, Medical Biochemistry and Pathology, Faculty of Medicine, Laval University, Québec, QC, G1V 0A6, Canada; St-Patrick Research Group in Basic Oncology, Québec University Hospital Research Centre, Québec, QC, G1R 3S3, Canada
| | - Lawrence I Rothblum
- Department of Cell Biology, University of Oklahoma College of Medicine, Oklahoma City, Oklahoma 73104, USA
| | - Richard B Pearson
- Research Division, Peter MacCallum Cancer Centre, East Melbourne, Victoria 3002, Australia; Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, Victoria 3010, Australia; Department of Biochemistry and Molecular Biology, Monash University, Clayton, Victoria 3800, Australia; Department of Biochemistry and Molecular Biology, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Izhak Haviv
- Department of Pathology, University of Melbourne, Parkville, Victoria 3010, Australia; Faculty of Medicine, Bar-Ilan University, Zfat, 13100, Israel
| | - Tom Moss
- Department of Molecular Biology, Medical Biochemistry and Pathology, Faculty of Medicine, Laval University, Québec, QC, G1V 0A6, Canada; St-Patrick Research Group in Basic Oncology, Québec University Hospital Research Centre, Québec, QC, G1R 3S3, Canada
| | - Ross D Hannan
- Research Division, Peter MacCallum Cancer Centre, East Melbourne, Victoria 3002, Australia; Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, Victoria 3010, Australia; Department of Biochemistry and Molecular Biology, Monash University, Clayton, Victoria 3800, Australia; Department of Biochemistry and Molecular Biology, University of Melbourne, Parkville, Victoria 3010, Australia; Division of Cancer Medicine, Peter MacCallum Cancer Centre, East Melbourne, Victoria 3002, Australia; School of Biomedical Sciences, University of Queensland, Brisbane 4072, Queensland, Australia
| |
Collapse
|
8
|
Hamdane N, Stefanovsky VY, Tremblay MG, Németh A, Paquet E, Lessard F, Sanij E, Hannan R, Moss T. Conditional inactivation of Upstream Binding Factor reveals its epigenetic functions and the existence of a somatic nucleolar precursor body. PLoS Genet 2014; 10:e1004505. [PMID: 25121932 PMCID: PMC4133168 DOI: 10.1371/journal.pgen.1004505] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Accepted: 05/24/2014] [Indexed: 11/21/2022] Open
Abstract
Upstream Binding Factor (UBF) is a unique multi-HMGB-box protein first identified as a co-factor in RNA polymerase I (RPI/PolI) transcription. However, its poor DNA sequence selectivity and its ability to generate nucleosome-like nucleoprotein complexes suggest a more generalized role in chromatin structure. We previously showed that extensive depletion of UBF reduced the number of actively transcribed ribosomal RNA (rRNA) genes, but had little effect on rRNA synthesis rates or cell proliferation, leaving open the question of its requirement for RPI transcription. Using gene deletion in mouse, we now show that UBF is essential for embryo development beyond morula. Conditional deletion in cell cultures reveals that UBF is also essential for transcription of the rRNA genes and that it defines the active chromatin conformation of both gene and enhancer sequences. Loss of UBF prevents formation of the SL1/TIF1B pre-initiation complex and recruitment of the RPI-Rrn3/TIF1A complex. It is also accompanied by recruitment of H3K9me3, canonical histone H1 and HP1α, but not by de novo DNA methylation. Further, genes retain penta-acetyl H4 and H2A.Z, suggesting that even in the absence of UBF the rRNA genes can maintain a potentially active state. In contrast to canonical histone H1, binding of H1.4 is dependent on UBF, strongly suggesting that it plays a positive role in gene activity. Unexpectedly, arrest of rRNA synthesis does not suppress transcription of the 5S, tRNA or snRNA genes, nor expression of the several hundred mRNA genes implicated in ribosome biogenesis. Thus, rRNA gene activity does not coordinate global gene expression for ribosome biogenesis. Loss of UBF also unexpectedly induced the formation in cells of a large sub-nuclear structure resembling the nucleolar precursor body (NPB) of oocytes and early embryos. These somatic NPBs contain rRNA synthesis and processing factors but do not associate with the rRNA gene loci (NORs). Upstream Binding Factor (UBF) is multi-HMGB-box protein found in all vertebrates. Although this protein has been implicated in transcription of the ribosomal RNA (rRNA) gene in vitro, little is known of its function in vivo. We previously found that UBF creates a nucleosome-like structure on DNA, and that this structure is remodeled by MAP-kinase phosphorylation. Using conditional gene deletion in mouse and mouse cells we show that UBF defines the active chromatin domains of the rRNA genes and is essential for transcription of these genes. Using this system we show that, contrary to expectation, rRNA gene activity does not coordinate ribosome production. We further show that in the complete absence of rRNA synthesis a somatic nucleolar precursor body is formed. Our data show that UBF determines a dynamic transition between the active and inactive rRNA gene states that is independent of changes in DNA methylation.
Collapse
Affiliation(s)
- Nourdine Hamdane
- Laboratory of Growth and Development, St-Patrick Research Group in Basic Oncology, Cancer Division of the Quebec University Hospital Research Centre, Edifice St Patrick, Québec, Québec, Canada
- Department of Molecular Biology, Medical Biochemistry and Pathology, Faculty of Medicine, Laval University, Québec, Québec, Canada
| | - Victor Y. Stefanovsky
- Laboratory of Growth and Development, St-Patrick Research Group in Basic Oncology, Cancer Division of the Quebec University Hospital Research Centre, Edifice St Patrick, Québec, Québec, Canada
- Department of Molecular Biology, Medical Biochemistry and Pathology, Faculty of Medicine, Laval University, Québec, Québec, Canada
| | - Michel G. Tremblay
- Laboratory of Growth and Development, St-Patrick Research Group in Basic Oncology, Cancer Division of the Quebec University Hospital Research Centre, Edifice St Patrick, Québec, Québec, Canada
- Department of Molecular Biology, Medical Biochemistry and Pathology, Faculty of Medicine, Laval University, Québec, Québec, Canada
| | - Attila Németh
- Department of Biochemistry III, Biochemistry Center Regensburg, University of Regensburg, Regensburg, Germany
| | - Eric Paquet
- Laboratory of Growth and Development, St-Patrick Research Group in Basic Oncology, Cancer Division of the Quebec University Hospital Research Centre, Edifice St Patrick, Québec, Québec, Canada
| | - Frédéric Lessard
- Laboratory of Growth and Development, St-Patrick Research Group in Basic Oncology, Cancer Division of the Quebec University Hospital Research Centre, Edifice St Patrick, Québec, Québec, Canada
- Department of Molecular Biology, Medical Biochemistry and Pathology, Faculty of Medicine, Laval University, Québec, Québec, Canada
| | - Elaine Sanij
- Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, Victoria, Australia
- Research Division, Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia
| | - Ross Hannan
- Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, Victoria, Australia
- Research Division, Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia
| | - Tom Moss
- Laboratory of Growth and Development, St-Patrick Research Group in Basic Oncology, Cancer Division of the Quebec University Hospital Research Centre, Edifice St Patrick, Québec, Québec, Canada
- Department of Molecular Biology, Medical Biochemistry and Pathology, Faculty of Medicine, Laval University, Québec, Québec, Canada
- * E-mail:
| |
Collapse
|
9
|
Ghezini Y, Hamdane N. Le risque cytotoxique en milieu hospitalier. ARCH MAL PROF ENVIRO 2012. [DOI: 10.1016/j.admp.2012.03.676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|