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Diaz O, Legrand AF, El-Orch W, Jacolin F, Lotteau V, Ramière C, Vidalain PO, Perrin-Cocon L. [Role of cellular metabolism in the control of chronic viral hepatitis]. Med Sci (Paris) 2023; 39:754-762. [PMID: 37943136 DOI: 10.1051/medsci/2023125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2023] Open
Abstract
Hepatitis viruses modify the cellular metabolism of hepatocytes by interacting with specific enzymes such as glucokinase. The metabolic changes induced by viruses can have a direct impact on the innate antiviral response. The complex interactions between viral components, innate immunity, and hepatocyte metabolism explain why chronic hepatitis infections lead to liver inflammation, progressing to cirrhosis, fibrosis, and hepatocellular carcinoma. Metabolic regulators could be used in innovative therapies to deprive viruses of key metabolites and induce an antiviral defense.
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Affiliation(s)
- Olivier Diaz
- CIRI, Centre international de recherche en infectiologie, équipe VIRIMI, Univ Lyon, Inserm U1111, université Claude Bernard Lyon 1, CNRS, UMR5308, École normale supérieure (ENS) de Lyon, F-69007, Lyon, France
| | - Anne-Flore Legrand
- CIRI, Centre international de recherche en infectiologie, équipe VIRIMI, Univ Lyon, Inserm U1111, université Claude Bernard Lyon 1, CNRS, UMR5308, École normale supérieure (ENS) de Lyon, F-69007, Lyon, France
| | - Walid El-Orch
- CIRI, Centre international de recherche en infectiologie, équipe VIRIMI, Univ Lyon, Inserm U1111, université Claude Bernard Lyon 1, CNRS, UMR5308, École normale supérieure (ENS) de Lyon, F-69007, Lyon, France
| | - Florentine Jacolin
- CIRI, Centre international de recherche en infectiologie, équipe VIRIMI, Univ Lyon, Inserm U1111, université Claude Bernard Lyon 1, CNRS, UMR5308, École normale supérieure (ENS) de Lyon, F-69007, Lyon, France
| | - Vincent Lotteau
- CIRI, Centre international de recherche en infectiologie, équipe VIRIMI, Univ Lyon, Inserm U1111, université Claude Bernard Lyon 1, CNRS, UMR5308, École normale supérieure (ENS) de Lyon, F-69007, Lyon, France
| | - Christophe Ramière
- CIRI, Centre international de recherche en infectiologie, équipe VIRIMI, Univ Lyon, Inserm U1111, université Claude Bernard Lyon 1, CNRS, UMR5308, École normale supérieure (ENS) de Lyon, F-69007, Lyon, France - Service de virologie, hospices civils de Lyon, hôpital de la Croix-Rousse, Lyon, France
| | - Pierre-Olivier Vidalain
- CIRI, Centre international de recherche en infectiologie, équipe VIRIMI, Univ Lyon, Inserm U1111, université Claude Bernard Lyon 1, CNRS, UMR5308, École normale supérieure (ENS) de Lyon, F-69007, Lyon, France
| | - Laure Perrin-Cocon
- CIRI, Centre international de recherche en infectiologie, équipe VIRIMI, Univ Lyon, Inserm U1111, université Claude Bernard Lyon 1, CNRS, UMR5308, École normale supérieure (ENS) de Lyon, F-69007, Lyon, France
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Diaz O, Vidalain PO, Ramière C, Lotteau V, Perrin-Cocon L. What role for cellular metabolism in the control of hepatitis viruses? Front Immunol 2022; 13:1033314. [PMID: 36466918 PMCID: PMC9713817 DOI: 10.3389/fimmu.2022.1033314] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 11/02/2022] [Indexed: 11/26/2023] Open
Abstract
Hepatitis B, C and D viruses (HBV, HCV, HDV, respectively) specifically infect human hepatocytes and often establish chronic viral infections of the liver, thus escaping antiviral immunity for years. Like other viruses, hepatitis viruses rely on the cellular machinery to meet their energy and metabolite requirements for replication. Although this was initially considered passive parasitism, studies have shown that hepatitis viruses actively rewire cellular metabolism through molecular interactions with specific enzymes such as glucokinase, the first rate-limiting enzyme of glycolysis. As part of research efforts in the field of immunometabolism, it has also been shown that metabolic changes induced by viruses could have a direct impact on the innate antiviral response. Conversely, detection of viral components by innate immunity receptors not only triggers the activation of the antiviral defense but also induces in-depth metabolic reprogramming that is essential to support immunological functions. Altogether, these complex triangular interactions between viral components, innate immunity and hepatocyte metabolism may explain why chronic hepatitis infections progressively lead to liver inflammation and progression to cirrhosis, fibrosis and hepatocellular carcinoma (HCC). In this manuscript, we first present a global overview of known connections between the innate antiviral response and cellular metabolism. We then report known molecular mechanisms by which hepatitis viruses interfere with cellular metabolism in hepatocytes and discuss potential consequences on the innate immune response. Finally, we present evidence that drugs targeting hepatocyte metabolism could be used as an innovative strategy not only to deprive viruses of key metabolites, but also to restore the innate antiviral response that is necessary to clear infection.
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Affiliation(s)
- Olivier Diaz
- CIRI, Centre International de Recherche en Infectiologie, Team VIRal Infection, Metabolism and Immunity, Univ Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, Lyon, France
| | - Pierre-Olivier Vidalain
- CIRI, Centre International de Recherche en Infectiologie, Team VIRal Infection, Metabolism and Immunity, Univ Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, Lyon, France
| | - Christophe Ramière
- CIRI, Centre International de Recherche en Infectiologie, Team VIRal Infection, Metabolism and Immunity, Univ Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, Lyon, France
- Laboratoire de Virologie, Hôpital de la Croix-Rousse, Hospices Civils de Lyon, Lyon, France
| | - Vincent Lotteau
- CIRI, Centre International de Recherche en Infectiologie, Team VIRal Infection, Metabolism and Immunity, Univ Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, Lyon, France
| | - Laure Perrin-Cocon
- CIRI, Centre International de Recherche en Infectiologie, Team VIRal Infection, Metabolism and Immunity, Univ Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, Lyon, France
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Diaz O, Esener D, Sacci P, Abrams E, Rose G. 170 Evaluation of Performance of Transesophageal Echocardiography by Emergency Medicine Residents After a Single Simulation-Based Training Session. Ann Emerg Med 2022. [DOI: 10.1016/j.annemergmed.2022.08.194] [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: 11/01/2022]
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Evin C, Quéro L, Le Malicot K, Blanchet-Deverly S, François E, Buchalet C, Lemanski C, Baba Hamed N, Rivin del Campo E, Bauwens L, Pommier P, Lièvre A, Tougeron D, Macé V, Sergent G, Diaz O, Zucman D, Mornex F, Locher C, De la Rochefordière A, Vendrely V, Huguet F. MO-0226 Clinical outcomes of HIV-positive patients with anal cancer in the ANABASE multicentric cohort. Radiother Oncol 2022. [DOI: 10.1016/s0167-8140(22)02328-3] [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: 11/24/2022]
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Van Woy L, Esener D, Sacci P, Diaz O, Murray M. 398 Factors Associated With Inconclusive Ultrasound in Pediatric Appendicitis. Ann Emerg Med 2021. [DOI: 10.1016/j.annemergmed.2021.09.413] [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: 11/30/2022]
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Van Woy L, Esener D, Sacci P, Diaz O, Murray M. 311 Pediatric Emergency Departments More Accurately Diagnose Appendicitis Using Ultrasound. Ann Emerg Med 2021. [DOI: 10.1016/j.annemergmed.2021.09.325] [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: 11/25/2022]
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Evin C, Quéro L, Le Malicot K, Blanchet-Deverly S, François E, Buchalet C, Lemanski C, Baba Hamed N, Rivin Del Campo E, Bauwens L, Pommier P, Lièvre A, Tougeron D, Mace V, Sergent G, Diaz O, Zucman D, Mornex F, Locher C, de La Rochefordiere A, Vendrely V, Huguet F. Efficacité et toxicité de la (chimio)radiothérapie chez les patients séropositifs pour le VIH atteints d’un carcinome épidermoïde du canal anal, analyse en sous-groupe de la cohorte multicentrique Anabase. Cancer Radiother 2021. [DOI: 10.1016/j.canrad.2021.07.026] [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: 11/26/2022]
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Zanca F, Avanzo M, Colgan N, Crijns W, Guidi G, Hernandez-Giron I, Kagadis GC, Diaz O, Zaidi H, Russo P, Toma-Dasu I, Kortesniemi M. Focus issue: Artificial intelligence in medical physics. Phys Med 2021; 83:287-291. [PMID: 34004585 DOI: 10.1016/j.ejmp.2021.05.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Affiliation(s)
- F Zanca
- Palindromo Consulting, Leuven, Belgium
| | - M Avanzo
- Centro di Riferimento Oncologico di Aviano (CRO) IRCCS, Department of Medical Physics, 33081 Aviano, PN, Italy
| | - N Colgan
- School of Physics, National University of Ireland Galway, Galway, Ireland
| | - W Crijns
- Department Oncology, Laboratory of Experimental Radiotherapy, KU Leuven and Department of Radiation Oncology, UZ Leuven, Belgium
| | - G Guidi
- Medical Physics, Az. Ospedaliero-Universitaria di Modena, Modena, Italy
| | - I Hernandez-Giron
- Leiden University Medical Center (LUMC), Radiology Department, Division of Image Processing, Albinusdreef 2, 2333ZA Leiden, The Netherlands
| | - G C Kagadis
- 3DMI Research Group, Department of Medical Physics, School of Medicine, University of Patras, GR 265 04, Greece
| | - O Diaz
- Faculty of Mathematics and Computer Science, University of Barcelona, Barcelona, Spain
| | - H Zaidi
- Geneva University Hospital, Division of Nuclear Medicine and Molecular Imaging, CH-1211 Geneva, Switzerland
| | - P Russo
- Università di Napoli Federico II, Dipartimento di Fisica "Ettore Pancini", I-80126 Naples, Italy
| | - I Toma-Dasu
- Department of Physics, Medical Radiation Physics, Stockholm University, Stockholm, Sweden; Department of Oncology and Pathology, Medical Radiation Physics, Karolinska Institutet, Stockholm, Sweden
| | - M Kortesniemi
- HUS Medical Imaging Center, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
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Perrin-Cocon L, Vidalain PO, Jacquemin C, Aublin-Gex A, Olmstead K, Panthu B, Rautureau GJP, André P, Nyczka P, Hütt MT, Amoedo N, Rossignol R, Filipp FV, Lotteau V, Diaz O. A hexokinase isoenzyme switch in human liver cancer cells promotes lipogenesis and enhances innate immunity. Commun Biol 2021; 4:217. [PMID: 33594203 PMCID: PMC7886870 DOI: 10.1038/s42003-021-01749-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Accepted: 12/11/2020] [Indexed: 12/15/2022] Open
Abstract
During the cancerous transformation of normal hepatocytes into hepatocellular carcinoma (HCC), the enzyme catalyzing the first rate-limiting step of glycolysis, namely the glucokinase (GCK), is replaced by the higher affinity isoenzyme, hexokinase 2 (HK2). Here, we show that in HCC tumors the highest expression level of HK2 is inversely correlated to GCK expression, and is associated to poor prognosis for patient survival. To further explore functional consequences of the GCK-to-HK2 isoenzyme switch occurring during carcinogenesis, HK2 was knocked-out in the HCC cell line Huh7 and replaced by GCK, to generate the Huh7-GCK+/HK2− cell line. HK2 knockdown and GCK expression rewired central carbon metabolism, stimulated mitochondrial respiration and restored essential metabolic functions of normal hepatocytes such as lipogenesis, VLDL secretion, glycogen storage. It also reactivated innate immune responses and sensitivity to natural killer cells, showing that consequences of the HK switch extend beyond metabolic reprogramming. Many cancers fuel their rapid growth by replacing glucokinase with its higher affinity isoenzyme, hexokinase 2 (HK2), making HK2 an attractive drug target. In this study, Perrin-Cocon and Vidalain et al. use CRISPR/Cas-9 gene editing to reverse this enzymatic switch in human liver cancer cells, and find this restores innate immune function as well as reversing cancer-associated metabolic reprogramming.
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Affiliation(s)
- Laure Perrin-Cocon
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 21 Avenue Tony Garnier, Lyon, F-69007, France
| | - Pierre-Olivier Vidalain
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 21 Avenue Tony Garnier, Lyon, F-69007, France
| | - Clémence Jacquemin
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 21 Avenue Tony Garnier, Lyon, F-69007, France
| | - Anne Aublin-Gex
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 21 Avenue Tony Garnier, Lyon, F-69007, France
| | - Keedrian Olmstead
- Cancer Systems Biology, Institute for Diabetes and Cancer, Helmholtz Zentrum München, Ingolstädter Landstraße 1, München, D-85764, Germany
| | - Baptiste Panthu
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 21 Avenue Tony Garnier, Lyon, F-69007, France.,Univ Lyon, CarMeN Laboratory, Inserm, INRA, INSA Lyon, Université Claude Bernard Lyon 1, Hôpital Lyon Sud, Bâtiment CENS ELI-2D, 165 Chemin du grand Revoyet, Pierre-Bénite, F-69310, France
| | - Gilles Jeans Philippe Rautureau
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Centre de RMN à Très Hauts Champs (CRMN), FRE 2034, 5 rue de la Doua, Villeurbanne, F-69100, France
| | - Patrice André
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 21 Avenue Tony Garnier, Lyon, F-69007, France
| | - Piotr Nyczka
- Department of Life Sciences and Chemistry, Jacobs University, Campus Ring 1, Bremen, D-28759, Germany
| | - Marc-Thorsten Hütt
- Department of Life Sciences and Chemistry, Jacobs University, Campus Ring 1, Bremen, D-28759, Germany
| | - Nivea Amoedo
- CELLOMET, Centre de Génomique Fonctionnelle de Bordeaux, 146 Rue Léo Saignat, Bordeaux, F-33000, France
| | - Rodrigue Rossignol
- CELLOMET, Centre de Génomique Fonctionnelle de Bordeaux, 146 Rue Léo Saignat, Bordeaux, F-33000, France.,Univ. Bordeaux, Inserm U1211, MRGM, Centre hospitalier universitaire Pellegrin, place Amélie Raba Léon, Bordeaux, F-33076, France
| | - Fabian Volker Filipp
- Cancer Systems Biology, Institute for Diabetes and Cancer, Helmholtz Zentrum München, Ingolstädter Landstraße 1, München, D-85764, Germany.,School of Life Sciences Weihenstephan, Technical University München, Maximus-von-Imhof-Forum 3, Freising, D-85354, Germany
| | - Vincent Lotteau
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 21 Avenue Tony Garnier, Lyon, F-69007, France.
| | - Olivier Diaz
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 21 Avenue Tony Garnier, Lyon, F-69007, France.
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Perrin-Cocon L, Diaz O, Jacquemin C, Barthel V, Ogire E, Ramière C, André P, Lotteau V, Vidalain PO. The current landscape of coronavirus-host protein-protein interactions. J Transl Med 2020; 18:319. [PMID: 32811513 PMCID: PMC7432461 DOI: 10.1186/s12967-020-02480-z] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [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: 05/23/2020] [Accepted: 08/07/2020] [Indexed: 12/23/2022] Open
Abstract
In less than 20 years, three deadly coronaviruses, SARS-CoV, MERS-CoV and SARS-CoV-2, have emerged in human population causing hundreds to hundreds of thousands of deaths. Other coronaviruses are causing epizootic representing a significant threat for both domestic and wild animals. Members of this viral family have the longest genome of all RNA viruses, and express up to 29 proteins establishing complex interactions with the host proteome. Deciphering these interactions is essential to identify cellular pathways hijacked by these viruses to replicate and escape innate immunity. Virus-host interactions also provide key information to select targets for antiviral drug development. Here, we have manually curated the literature to assemble a unique dataset of 1311 coronavirus-host protein–protein interactions. Functional enrichment and network-based analyses showed coronavirus connections to RNA processing and translation, DNA damage and pathogen sensing, interferon production, and metabolic pathways. In particular, this global analysis pinpointed overlooked interactions with translation modulators (GIGYF2-EIF4E2), components of the nuclear pore, proteins involved in mitochondria homeostasis (PHB, PHB2, STOML2), and methylation pathways (MAT2A/B). Finally, interactome data provided a rational for the antiviral activity of some drugs inhibiting coronaviruses replication. Altogether, this work describing the current landscape of coronavirus-host interactions provides valuable hints for understanding the pathophysiology of coronavirus infections and developing effective antiviral therapies.
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Affiliation(s)
- Laure Perrin-Cocon
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007, Lyon, France
| | - Olivier Diaz
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007, Lyon, France
| | - Clémence Jacquemin
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007, Lyon, France
| | - Valentine Barthel
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007, Lyon, France
| | - Eva Ogire
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007, Lyon, France.,UMR Processus Infectieux en Milieu Insulaire Tropical, Université de La Réunion, CNRS, 9192 INSERM U1187, IRD 249, Plateforme de Recherche CYROI, Sainte Clotilde La Réunion, France
| | - Christophe Ramière
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007, Lyon, France.,Laboratoire de Virologie, Hôpital de la Croix-Rousse, Hospices Civils de Lyon, Lyon, France
| | - Patrice André
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007, Lyon, France
| | - Vincent Lotteau
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007, Lyon, France.
| | - Pierre-Olivier Vidalain
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007, Lyon, France.
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Hayek S, Pietrancosta N, Hovhannisyan AA, Alves de Sousa R, Bekaddour N, Ermellino L, Tramontano E, Arnould S, Sardet C, Dairou J, Diaz O, Lotteau V, Nisole S, Melikyan G, Herbeuval JP, Vidalain PO. Cerpegin-derived furo[3,4-c]pyridine-3,4(1H,5H)-diones enhance cellular response to interferons by de novo pyrimidine biosynthesis inhibition. Eur J Med Chem 2019; 186:111855. [PMID: 31740051 DOI: 10.1016/j.ejmech.2019.111855] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 11/02/2019] [Accepted: 11/04/2019] [Indexed: 12/22/2022]
Abstract
There is an increasing interest in the field of cancer therapy for small compounds targeting pyrimidine biosynthesis, and in particular dihydroorotate dehydrogenase (DHODH), the fourth enzyme of this metabolic pathway. Three available DHODH structures, featuring three different known inhibitors, were used as templates to screen in silico an original chemical library from Erevan University. This process led to the identification of P1788, a compound chemically related to the alkaloid cerpegin, as a new class of pyrimidine biosynthesis inhibitors. In line with previous reports, we investigated the effect of P1788 on the cellular innate immune response. Here we show that pyrimidine depletion by P1788 amplifies cellular response to both type-I and type II interferons, but also induces DNA damage as assessed by γH2AX staining. Moreover, the addition of inhibitors of the DNA damage response led to the suppression of the P1788 stimulatory effects on the interferon pathway. This demonstrates that components of the DNA damage response are bridging the inhibition of pyrimidine biosynthesis by P1788 to the interferon signaling pathway. Altogether, these results provide new insights on the mode of action of novel pyrimidine biosynthesis inhibitors and their development for cancer therapies.
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Affiliation(s)
- Simon Hayek
- Chimie et Biologie, Modélisation et Immunologie pour la Thérapie (CBMIT), Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, Université Paris Descartes, CNRS UMR8601, Paris, France
| | - Nicolas Pietrancosta
- Chimie et Biologie, Modélisation et Immunologie pour la Thérapie (CBMIT), Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, Université Paris Descartes, CNRS UMR8601, Paris, France
| | | | - Rodolphe Alves de Sousa
- Chimie et Biologie, Modélisation et Immunologie pour la Thérapie (CBMIT), Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, Université Paris Descartes, CNRS UMR8601, Paris, France
| | - Nassima Bekaddour
- Chimie et Biologie, Modélisation et Immunologie pour la Thérapie (CBMIT), Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, Université Paris Descartes, CNRS UMR8601, Paris, France
| | - Laura Ermellino
- Chimie et Biologie, Modélisation et Immunologie pour la Thérapie (CBMIT), Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, Université Paris Descartes, CNRS UMR8601, Paris, France; Laboratory of Molecular Virology, Department of Life and Environmental Sciences, University of Cagliari, Cagliari, Italy
| | - Enzo Tramontano
- Laboratory of Molecular Virology, Department of Life and Environmental Sciences, University of Cagliari, Cagliari, Italy
| | - Stéphanie Arnould
- Institut de Recherche en Cancérologie de Montpellier, INSERM U1194, Université de Montpellier, Institut Régional du Cancer de Montpellier, Montpellier, France
| | - Claude Sardet
- Institut de Recherche en Cancérologie de Montpellier, INSERM U1194, Université de Montpellier, Institut Régional du Cancer de Montpellier, Montpellier, France
| | - Julien Dairou
- Chimie Bio-inorganique des Dérivés Soufrés et Pharmacochimie (CBDSP), Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, Université Paris Descartes, CNRS UMR8601, Paris, France
| | - Olivier Diaz
- Centre International de Recherche en Infectiologie, INSERM U1111, CNRS UMR5308, Université Lyon 1, ENS de Lyon, Lyon, France
| | - Vincent Lotteau
- Centre International de Recherche en Infectiologie, INSERM U1111, CNRS UMR5308, Université Lyon 1, ENS de Lyon, Lyon, France
| | - Sébastien Nisole
- Institut de Recherche en Infectiologie de Montpellier, CNRS UMR9004, Université de Montpellier, Montpellier, France
| | - Gagik Melikyan
- Department of Organic Chemistry, Yerevan State University, Yerevan, Armenia.
| | - Jean-Philippe Herbeuval
- Chimie et Biologie, Modélisation et Immunologie pour la Thérapie (CBMIT), Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, Université Paris Descartes, CNRS UMR8601, Paris, France
| | - Pierre-Olivier Vidalain
- Chimie et Biologie, Modélisation et Immunologie pour la Thérapie (CBMIT), Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, Université Paris Descartes, CNRS UMR8601, Paris, France.
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Vendrely V, Lemanski C, Baba-Hamed N, Barbier E, Bénézery K, de La Rochefordière A, Guibert P, Bonichon-Lamichhane N, Pommier P, Créhange G, Colliaux J, Gnep K, Ronchin P, Saliou M, Diaz O, Lepage C, Quéro L. Traitement du cancer du canal anal : premiers résultats de la cohorte nationale Anabase. Cancer Radiother 2018. [DOI: 10.1016/j.canrad.2018.07.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Perrin-Cocon L, Aublin-Gex A, Diaz O, Ramière C, Peri F, André P, Lotteau V. Toll-like Receptor 4-Induced Glycolytic Burst in Human Monocyte-Derived Dendritic Cells Results from p38-Dependent Stabilization of HIF-1α and Increased Hexokinase II Expression. J Immunol 2018; 201:1510-1521. [PMID: 30037846 DOI: 10.4049/jimmunol.1701522] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Accepted: 07/03/2018] [Indexed: 12/22/2022]
Abstract
Cell metabolism now appears as an essential regulator of immune cells activation. In particular, TLR stimulation triggers metabolic reprogramming of dendritic cells (DCs) with an increased glycolytic flux, whereas inhibition of glycolysis alters their functional activation. The molecular mechanisms involved in the control of glycolysis upon TLR stimulation are poorly understood for human DCs. TLR4 activation of human monocyte-derived DCs (MoDCs) stimulated glycolysis with an increased glucose consumption and lactate production. Global hexokinase (HK) activity, controlling the initial rate-limiting step of glycolysis, was also increased. TLR4-induced glycolytic burst correlated with a differential modulation of HK isoenzymes. LPS strongly enhanced the expression of HK2, whereas HK3 was reduced, HK1 remained unchanged, and HK4 was not expressed. Expression of the other rate-limiting glycolytic enzymes was not significantly increased. Exploring the signaling pathways involved in LPS-induced glycolysis with various specific inhibitors, we observed that only the inhibitors of p38-MAPK (SB203580) and of HIF-1α DNA binding (echinomycin) reduced both the glycolytic activity and production of cytokines triggered by TLR4 stimulation. In addition, LPS-induced HK2 expression required p38-MAPK-dependent HIF-1α accumulation and transcriptional activity. TLR1/2 and TLR2/6 stimulation increased glucose consumption by MoDCs through alternate mechanisms that are independent of p38-MAPK activation. TBK1 contributed to glycolysis regulation when DCs were stimulated via TLR2/6. Therefore, our results indicate that TLR4-dependent upregulation of glycolysis in human MoDCs involves a p38-MAPK-dependent HIF-1α accumulation, leading to an increased HK activity supported by enhanced HK2 expression.
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Affiliation(s)
- Laure Perrin-Cocon
- Centre International de Recherche en Infectiologie, Biologie Cellulaire des Infections Virales, INSERM, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, École Normale Supérieure de Lyon, Hospices Civils de Lyon, Université de Lyon, Lyon, France; and
| | - Anne Aublin-Gex
- Centre International de Recherche en Infectiologie, Biologie Cellulaire des Infections Virales, INSERM, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, École Normale Supérieure de Lyon, Hospices Civils de Lyon, Université de Lyon, Lyon, France; and
| | - Olivier Diaz
- Centre International de Recherche en Infectiologie, Biologie Cellulaire des Infections Virales, INSERM, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, École Normale Supérieure de Lyon, Hospices Civils de Lyon, Université de Lyon, Lyon, France; and
| | - Christophe Ramière
- Centre International de Recherche en Infectiologie, Biologie Cellulaire des Infections Virales, INSERM, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, École Normale Supérieure de Lyon, Hospices Civils de Lyon, Université de Lyon, Lyon, France; and
| | - Francesco Peri
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, 20126 Milano, Italy
| | - Patrice André
- Centre International de Recherche en Infectiologie, Biologie Cellulaire des Infections Virales, INSERM, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, École Normale Supérieure de Lyon, Hospices Civils de Lyon, Université de Lyon, Lyon, France; and
| | - Vincent Lotteau
- Centre International de Recherche en Infectiologie, Biologie Cellulaire des Infections Virales, INSERM, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, École Normale Supérieure de Lyon, Hospices Civils de Lyon, Université de Lyon, Lyon, France; and
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Vendrely V, Lemanski C, François E, Barbier E, Baba Hamed N, Bonichon-Lamichhane N, De La Rochefordière A, Bouché O, Tougeron D, Diaz O, Pommier P, Ronchin P, Saliou M, Cretin J, Lepage C, Quéro L. OC-0284: First results of the French cohort ANABASE : treatment and outcome in non-metastatic anal cancer. Radiother Oncol 2018. [DOI: 10.1016/s0167-8140(18)30594-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Fernández YT, Diaz O, Acuña E, Casanova M, Salazar O, Masaguer A. Phytostabilization of arsenic in soils with plants of the genus Atriplex established in situ in the Atacama Desert. Environ Monit Assess 2016; 188:235. [PMID: 27000320 DOI: 10.1007/s10661-016-5247-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Accepted: 03/14/2016] [Indexed: 05/21/2023]
Abstract
In the ChiuChiu village (Atacama Desert, Chile), there is a high concentration of arsenic (As) in the soil due to natural causes related to the presence of volcanoes and geothermal activity. To compare the levels of As and the growth parameters among plants of the same genus, three species of plants were established in situ: Atriplex atacamensis (native of Chile), Atriplex halimus, and Atriplex nummularia. These soils have an As concentration of 131.2 ± 10.4 mg kg(-1), a pH of 8.6 ± 0.1, and an electrical conductivity of 7.06 ± 2.37 dS m(-1). Cuttings of Atriplex were transplanted and maintained for 5 months with periodic irrigation and without the addition of fertilizers. The sequential extraction of As indicated that the metalloid in these soils has a high bioavailability (38 %), which is attributed to the alkaline pH, low organic matter and Fe oxide content, and sandy texture. At day 90 of the assay, the As concentrations in the leaves of A. halimus (4.53 ± 1.14 mg kg(-1)) and A. nummularia (3.85 ± 0.64 mg kg(-1)) were significantly higher than that in A. atacamensis (2.46 ± 1.82 mg kg(-1)). However, the three species accumulated higher levels of As in their roots, indicating a phytostabilization capacity. At the end of the assay, A. halimus and A. nummularia generated 30 % more biomass than A. atacamensis without significant differences in the As levels in the leaves. Despite the difficult conditions in these soils, the establishment of plants of the genus Atriplex is a recommended strategy to generate a vegetative cover that prevents the metalloid from spreading in this arid area through the soil or by wind.
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Affiliation(s)
- Yasna Tapia Fernández
- Departamento de Ingeniería y Suelos, Universidad de Chile, Santa Rosa 11315, 8820808, Santiago, Chile.
| | - O Diaz
- Departamento de Biología, Universidad de Santiago de Chile, Casilla 40, Correo 33, Santiago, Chile
| | - E Acuña
- Departamento de Ingeniería y Suelos, Universidad de Chile, Santa Rosa 11315, 8820808, Santiago, Chile
| | - M Casanova
- Departamento de Ingeniería y Suelos, Universidad de Chile, Santa Rosa 11315, 8820808, Santiago, Chile
| | - O Salazar
- Departamento de Ingeniería y Suelos, Universidad de Chile, Santa Rosa 11315, 8820808, Santiago, Chile
| | - A Masaguer
- Departamento de Producción Agraria, Universidad Politécnica de Madrid, CP 28040, Madrid, Spain
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Lavine SD, Cockroft K, Hoh B, Bambakidis N, Khalessi AA, Woo H, Riina H, Siddiqui A, Hirsch JA, Chong W, Rice H, Wenderoth J, Mitchell P, Coulthard A, Signh TJ, Phatorous C, Khangure M, Klurfan P, Ter Brugge K, Iancu D, Gunnarsson T, Jansen O, Muto M, Szikora I, Pierot L, Brouwer P, Gralla J, Renowden S, Andersson T, Fiehler J, Turjman F, White P, Januel AC, Spelle L, Kulcsar Z, Chapot R, Biondi A, Dima S, Taschner C, Szajner M, Krajina A, Sakai N, Matsumaru Y, Yoshimura S, Diaz O, Lylyk P, Jayaraman MV, Patsalides A, Gandhi CD, Lee SK, Abruzzo T, Albani B, Ansari SA, Arthur AS, Baxter BW, Bulsara KR, Chen M, Almandoz JED, Fraser JF, Heck DV, Hetts SW, Hussain MS, Klucznik RP, Leslie-Mawzi TM, Mack WJ, McTaggart RA, Meyers PM, Mocco J, Prestigiacomo CJ, Pride GL, Rasmussen PA, Starke RM, Sunenshine PJ, Tarr RW, Frei DF, Ribo M, Nogueira RG, Zaidat OO, Jovin T, Linfante I, Yavagal D, Liebeskind D, Novakovic R, Pongpech S, Rodesch G, Soderman M, Ter Brugge K, Taylor A, Krings T, Orbach D, Biondi A, Picard L, Suh DC, Tanaka M, Zhang HQ. Training Guidelines for Endovascular Stroke Intervention: An International Multi-Society Consensus Document. Interv Neurol 2016; 5:51-6. [PMID: 27610121 DOI: 10.1159/000444945] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Lavine SD, Cockroft K, Hoh B, Bambakidis N, Khalessi AA, Woo H, Riina H, Siddiqui A, Hirsch JA, Chong W, Rice H, Wenderoth J, Mitchell P, Coulthard A, Signh TJ, Phatorous C, Khangure M, Klurfan P, terBrugge K, Iancu D, Gunnarsson T, Jansen O, Muto M, Szikora I, Pierot L, Brouwer P, Gralla J, Renowden S, Andersson T, Fiehler J, Turjman F, White P, Januel AC, Spelle L, Kulcsar Z, Chapot R, Spelle L, Biondi A, Dima S, Taschner C, Szajner M, Krajina A, Sakai N, Matsumaru Y, Yoshimura S, Ezura M, Fujinaka T, Iihara K, Ishii A, Higashi T, Hirohata M, Hyodo A, Ito Y, Kawanishi M, Kiyosue H, Kobayashi E, Kobayashi S, Kuwayama N, Matsumoto Y, Miyachi S, Murayama Y, Nagata I, Nakahara I, Nemoto S, Niimi Y, Oishi H, Satomi J, Satow T, Sugiu K, Tanaka M, Terada T, Yamagami H, Diaz O, Lylyk P, Jayaraman MV, Patsalides A, Gandhi CD, Lee SK, Abruzzo T, Albani B, Ansari SA, Arthur AS, Baxter BW, Bulsara KR, Chen M, Delgado Almandoz JE, Fraser JF, Heck DV, Hetts SW, Hussain MS, Klucznik RP, Leslie-Mawzi TM, Mack WJ, McTaggart RA, Meyers PM, Mocco J, Prestigiacomo CJ, Pride GL, Rasmussen PA, Starke RM, Sunenshine PJ, Tarr RW, Frei DF, Ribo M, Nogueira RG, Zaidat OO, Jovin T, Linfante I, Yavagal D, Liebeskind D, Novakovic R, Pongpech S, Rodesch G, Soderman M, terBrugge K, Taylor A, Krings T, Orbach D, Biondi A, Picard L, Suh DC, Tanaka M, Zhang HQ. Training Guidelines for Endovascular Ischemic Stroke Intervention: An International Multi-Society Consensus Document. AJNR Am J Neuroradiol 2016; 37:E31-4. [PMID: 26892982 DOI: 10.3174/ajnr.a4766] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Karmonik C, Anderson JR, Beilner J, Ge JJ, Partovi S, Klucznik RP, Diaz O, Zhang YJ, Britz GW, Grossman RG, Lv N, Huang Q. Relationships and redundancies of selected hemodynamic and structural parameters for characterizing virtual treatment of cerebral aneurysms with flow diverter devices. J Biomech 2015; 49:2112-2117. [PMID: 26654675 DOI: 10.1016/j.jbiomech.2015.11.035] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Accepted: 11/13/2015] [Indexed: 11/28/2022]
Abstract
BACKGROUND AND PURPOSE To quantify the relationship and to demonstrate redundancies between hemodynamic and structural parameters before and after virtual treatment with a flow diverter device (FDD) in cerebral aneurysms. METHODS Steady computational fluid dynamics (CFD) simulations were performed for 10 cerebral aneurysms where FDD treatment with the SILK device was simulated by virtually reducing the porosity at the aneurysm ostium. Velocity and pressure values proximal and distal to and at the aneurysm ostium as well as inside the aneurysm were quantified. In addition, dome-to-neck ratios and size ratios were determined. Multiple correlation analysis (MCA) and hierarchical cluster analysis (HCA) were conducted to demonstrate dependencies between both structural and hemodynamic parameters. RESULTS Velocities in the aneurysm were reduced by 0.14m/s on average and correlated significantly (p<0.05) with velocity values in the parent artery (average correlation coefficient: 0.70). Pressure changes in the aneurysm correlated significantly with pressure values in the parent artery and aneurysm (average correlation coefficient: 0.87). MCA found statistically significant correlations between velocity values and between pressure values, respectively. HCA sorted velocity parameters, pressure parameters and structural parameters into different hierarchical clusters. HCA of aneurysms based on the parameter values yielded similar results by either including all (n=22) or only non-redundant parameters (n=2, 3 and 4). CONCLUSION Hemodynamic and structural parameters before and after virtual FDD treatment show strong inter-correlations. Redundancy of parameters was demonstrated with hierarchical cluster analysis.
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Affiliation(s)
- C Karmonik
- MRI Core, Houston Methodist Research Institute, Houston, TX, USA; Cerebrovascular Center, Neurosurgery, Houston Methodist, Houston, TX, USA.
| | - J R Anderson
- MRI Core, Houston Methodist Research Institute, Houston, TX, USA
| | | | - J J Ge
- Siemens AX, Shanghai, China
| | - S Partovi
- Department of Radiology, University Hospitals Case Medical Center, Case Western Reserve University, Cleveland, OH, USA
| | - R P Klucznik
- Cerebrovascular Center, Radiology, Houston Methodist, Houston, TX, USA
| | - O Diaz
- Cerebrovascular Center, Radiology, Houston Methodist, Houston, TX, USA
| | - Y J Zhang
- Cerebrovascular Center, Neurosurgery, Houston Methodist, Houston, TX, USA
| | - G W Britz
- Cerebrovascular Center, Neurosurgery, Houston Methodist, Houston, TX, USA
| | - R G Grossman
- Cerebrovascular Center, Neurosurgery, Houston Methodist, Houston, TX, USA
| | - N Lv
- Neurosurgery, The Affiliated Changhai Hospital of Second Military Medical University, Shanghai, China
| | - Q Huang
- Neurosurgery, The Affiliated Changhai Hospital of Second Military Medical University, Shanghai, China
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Enache EL, Sin A, Bancu L, Ramière C, Diaz O, André P, Enache LS. Duplex High-Resolution Melting Assay for the Simultaneous Genotyping of IL28B rs12979860 and PNPLA3 rs738409 Polymorphisms in Chronic Hepatitis C Patients. Int J Mol Sci 2015; 16:22223-42. [PMID: 26389885 PMCID: PMC4613305 DOI: 10.3390/ijms160922223] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Revised: 09/02/2015] [Accepted: 09/08/2015] [Indexed: 02/07/2023] Open
Abstract
Chronic hepatitis C (CHC) is a major burden for public health worldwide. Although newer direct-acting antivirals show good efficacy, their cost precludes their wide adoption in resource-limited regions. Thus, strategies are being developed to help identify patients with high susceptibility to response to classic PEG-interferon + ribavirin therapy. IL28B polymorphism rs12979860 C/T is an important predictor for an efficient response to interferon-based therapy. A genetic variant in adiponutrin (PNPLA3) gene, rs738409 C/G, is associated with steatosis, severity, and progression of liver fibrosis in CHC patients, and predicts treatment outcome in difficult-to-cure HCV-infected patients with advanced fibrosis. We developed a rapid and inexpensive assay based on duplex high-resolution melting (HRM) for the simultaneous genotyping of these two polymorphisms. The assay validation was performed on synthetic DNA templates and 132 clinical samples from CHC patients. When compared with allele-specific PCR and sequencing, our assay showed 100% (95% CI: 0.9724-1) accuracy, with 100% sensitivity and specificity. Our assay was robust against concentration and quality of DNA samples, melting curve normalization intervals, HRM analysis algorithm, and sequence variations near the targeted SNPs (single nucleotide polymorphism). This duplex assay should provide useful information for patient-oriented management and clinical decision-making in CHC.
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Affiliation(s)
- Elena L Enache
- University of Medicine and Pharmacy Tirgu Mures, 38 Gh. Marinescu st., Tirgu Mures 540142, Romania.
| | - Anca Sin
- University of Medicine and Pharmacy Tirgu Mures, 38 Gh. Marinescu st., Tirgu Mures 540142, Romania.
- Emergency County Clinical Hospital, 50 Gh. Marinescu st., Tirgu Mures 540136, Romania.
| | - Ligia Bancu
- University of Medicine and Pharmacy Tirgu Mures, 38 Gh. Marinescu st., Tirgu Mures 540142, Romania.
- Emergency County Clinical Hospital, 50 Gh. Marinescu st., Tirgu Mures 540136, Romania.
| | - Christophe Ramière
- Université de Lyon, Université Lyon 1, Lyon F-69008, France.
- Inserm U1111, 21 Avenue Tony Garnier, Lyon F-69007, France.
- CIRI, Centre International de Recherche en Infectiologie, Université de Lyon, 21 Avenue Tony Garnier, 69365 Lyon Cedex 07, France.
- Ecole Normale Supérieure de Lyon, 15 parvis René Descartes, BP 7000 69342 Lyon Cedex 07, France.
- CNRS, UMR5308, 21 avenue Tony Garnier, 69365 Lyon Cedex 07, France.
- Hospices Civils de Lyon, Hôpital de la Croix Rousse, Laboratoire de Virologie, Lyon F-69004, France.
| | - Olivier Diaz
- Université de Lyon, Université Lyon 1, Lyon F-69008, France.
- Inserm U1111, 21 Avenue Tony Garnier, Lyon F-69007, France.
- CIRI, Centre International de Recherche en Infectiologie, Université de Lyon, 21 Avenue Tony Garnier, 69365 Lyon Cedex 07, France.
- Ecole Normale Supérieure de Lyon, 15 parvis René Descartes, BP 7000 69342 Lyon Cedex 07, France.
- CNRS, UMR5308, 21 avenue Tony Garnier, 69365 Lyon Cedex 07, France.
| | - Patrice André
- Université de Lyon, Université Lyon 1, Lyon F-69008, France.
- Inserm U1111, 21 Avenue Tony Garnier, Lyon F-69007, France.
- CIRI, Centre International de Recherche en Infectiologie, Université de Lyon, 21 Avenue Tony Garnier, 69365 Lyon Cedex 07, France.
- Ecole Normale Supérieure de Lyon, 15 parvis René Descartes, BP 7000 69342 Lyon Cedex 07, France.
- CNRS, UMR5308, 21 avenue Tony Garnier, 69365 Lyon Cedex 07, France.
- Hospices Civils de Lyon, Hôpital de la Croix Rousse, Laboratoire de Virologie, Lyon F-69004, France.
| | - Liviu S Enache
- University of Medicine and Pharmacy Tirgu Mures, 38 Gh. Marinescu st., Tirgu Mures 540142, Romania.
- Emergency County Clinical Hospital, 50 Gh. Marinescu st., Tirgu Mures 540136, Romania.
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Hanel R, Bonafe A, Fischer S, Diaz O, Kallmes D, Barnwell S, Woo H. O-020 treatment of giant intracranial aneurysms with pipeline: aspire (aneurysm study of pipeline in an observational registry) results. J Neurointerv Surg 2015. [DOI: 10.1136/neurintsurg-2015-011917.20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Zhang Y, Scranton R, Britz G, Diaz O, Klucznik R. E-012 flow diversion: safe and efficacious method in the treatment of cerebrovascular disease. J Neurointerv Surg 2015. [DOI: 10.1136/neurintsurg-2015-011917.87] [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: 11/04/2022]
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Ferrandon S, Magné N, Battiston-Montagne P, Hau-Desbat NH, Diaz O, Beuve M, Constanzo J, Chargari C, Poncet D, Chautard E, Ardail D, Alphonse G, Rodriguez-Lafrasse C. Cellular and molecular portrait of eleven human glioblastoma cell lines under photon and carbon ion irradiation. Cancer Lett 2015; 360:10-6. [PMID: 25657111 DOI: 10.1016/j.canlet.2015.01.025] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Revised: 01/19/2015] [Accepted: 01/20/2015] [Indexed: 10/25/2022]
Abstract
This study aimed to examine the cellular and molecular long-term responses of glioblastomas to radiotherapy and hadrontherapy in order to better understand the biological effects of carbon beams in cancer treatment. Eleven human glioblastoma cell lines, displaying gradual radiosensitivity, were irradiated with photons or carbon ions. Independently of p53 or O(6)-methylguanine-DNA methyltransferase(1) status, all cell lines responded to irradiation by a G2/M phase arrest followed by the appearance of mitotic catastrophe, which was concluded by a ceramide-dependent-apoptotic cell death. Statistical analysis demonstrated that: (i) the SF2(2) and the D10(3) values for photon are correlated with that obtained in response to carbon ions; (ii) regardless of the p53, MGMT status, and radiosensitivity, the release of ceramide is associated with the induction of late apoptosis; and (iii) the appearance of polyploid cells after photon irradiation could predict the Relative Biological Efficiency(4) to carbon ions. This large collection of data should increase our knowledge in glioblastoma radiobiology in order to better understand, and to later individualize, appropriate radiotherapy treatment for patients who are good candidates.
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Affiliation(s)
- S Ferrandon
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté Médecine Lyon-Sud, Université de Lyon, Université Lyon1, 69921 Oullins, France
| | - N Magné
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté Médecine Lyon-Sud, Université de Lyon, Université Lyon1, 69921 Oullins, France; Départment de Radiothérapie, Institut de Cancérologie Lucien Neuwirth, 42271 St Priest-en-Jarez, France
| | - P Battiston-Montagne
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté Médecine Lyon-Sud, Université de Lyon, Université Lyon1, 69921 Oullins, France
| | - N-H Hau-Desbat
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté Médecine Lyon-Sud, Université de Lyon, Université Lyon1, 69921 Oullins, France
| | - O Diaz
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté Médecine Lyon-Sud, Université de Lyon, Université Lyon1, 69921 Oullins, France
| | - M Beuve
- IPNL-LIRIS-CNRS-IN2P3, 69622 Villeurbanne, France
| | - J Constanzo
- IPNL-LIRIS-CNRS-IN2P3, 69622 Villeurbanne, France
| | - C Chargari
- Service de Radiothérapie, Hôpital du Val de Grâce, 75230 Paris, France
| | - D Poncet
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté Médecine Lyon-Sud, Université de Lyon, Université Lyon1, 69921 Oullins, France; Hospices Civils de Lyon, Centre Hospitalier Lyon-Sud, 69495 Pierre-Bénite, France
| | - E Chautard
- Centre Jean Perrin, Laboratoire de Radio-Oncologie Expérimentale, Clermont Université, EA7283 CREaT, Université d'Auvergne, 63011 Clermont-Ferrand, France
| | - D Ardail
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté Médecine Lyon-Sud, Université de Lyon, Université Lyon1, 69921 Oullins, France; Hospices Civils de Lyon, Centre Hospitalier Lyon-Sud, 69495 Pierre-Bénite, France
| | - G Alphonse
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté Médecine Lyon-Sud, Université de Lyon, Université Lyon1, 69921 Oullins, France; Hospices Civils de Lyon, Centre Hospitalier Lyon-Sud, 69495 Pierre-Bénite, France
| | - C Rodriguez-Lafrasse
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté Médecine Lyon-Sud, Université de Lyon, Université Lyon1, 69921 Oullins, France; Hospices Civils de Lyon, Centre Hospitalier Lyon-Sud, 69495 Pierre-Bénite, France.
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Teigen C, Moyle H, Patel R, Fischman A, Kim E, Baxter B, Quarfordt S, Heck D, Klucznik R, Diaz O, Reeves A, Abraham M, Madarang E, Zwiebel B, Brant-Zawadzki M, Peck W, Nguyen B, Whitaker L, Gailloud P, Hagino R, Liu K, Moskovitz J, Luong E, Lai J, Kuo S, Hak S, Nguyen N, Bose A, Sit S. Experience using large volume detachable coils in the peripheral vasculature: preliminary results from the ACE multicenter study. J Vasc Interv Radiol 2015. [DOI: 10.1016/j.jvir.2014.12.071] [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: 10/24/2022] Open
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Teigen C, Moyle H, Patel R, Fischman A, Kim E, Baxter B, Quarfordt S, Heck D, Klucznik R, Diaz O, Reeves A, Abraham M, Madarang E, Zwiebel B, Brant-Zawadzki M, Peck W, Nguyen B, Whitaker L, Gailloud P, Hagino R, Liu K, Moskovitz J, Luong E, Lai J, Kuo S, Hak S, Buell H, Bose A, Sit S. Experience Using the Penumbra Ruby Coil in the Peripheral Vasculature: ACE Multicenter Study Preliminary Results. J Vasc Interv Radiol 2015. [DOI: 10.1016/j.jvir.2014.10.029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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Abstract
Digital breast tomosynthesis (DBT) is a promising technique to overcome the tissue superposition limitations found in planar 2D x-ray mammography. However, as most DBT systems do not employ an anti-scatter grid, the levels of scattered radiation recorded within the image receptor are significantly higher than that observed in planar 2D x-ray mammography. Knowledge of this field is necessary as part of any correction scheme and for computer modelling and optimisation of this examination. Monte Carlo (MC) simulations are often used for this purpose, however they are computationally expensive and a more rapid method of calculation is desirable. This issue is addressed in this work by the development of a fast kernel-based methodology for scatter field estimation using a detailed realistic DBT geometry. Thickness-dependent scatter kernels, which were validated against the literature with a maximum discrepancy of 4% for an idealised geometry, have been calculated and a new physical parameter (air gap distance) was used to estimate more accurately the distribution of scattered radiation for a series of anthropomorphic breast phantom models. The proposed methodology considers, for the first time, the effects of scattered radiation from the compression paddle and breast support plate, which can represent more than 30% of the total scattered radiation recorded within the image receptor. The results show that the scatter field estimator can calculate scattered radiation images in an average of 80 min for projection angles up to 25° with equal to or less than a 10% error across most of the breast area when compared with direct MC simulations.
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Affiliation(s)
- O Diaz
- Centre for Vision, Speech and Signal Processing, University of Surrey, Guildford, GU2 7XH, UK
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Fiorella D, Derdeyn C, Turk A, Boulos A, Diaz O, Pride G, Jabbour P, Woo H. O-004 Final Results of the US Humanitarian Device Exemption Study of the Low-profile Visualised Intraluminal Support (LVIS) Device. J Neurointerv Surg 2014. [DOI: 10.1136/neurintsurg-2014-011343.4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Karmonik C, Diaz O, Klucznik R, Grossman RG, Zhang YJ, Britz G, Lv N, Huang Q. Quantitative comparison of hemodynamic parameters from steady and transient CFD simulations in cerebral aneurysms with focus on the aneurysm ostium. J Neurointerv Surg 2014; 7:367-72. [DOI: 10.1136/neurintsurg-2014-011182] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Accepted: 03/24/2014] [Indexed: 11/03/2022]
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Teigen C, Moyle H, Patel R, Fischman A, Kim E, Baxter B, Quarfordt S, Heck D, Klucznik R, Diaz O, Reeves A, Abraham M, Madarang E, Zwiebel B, Brant-Zawadzki M, Peck W, Nguyen B, Whitaker L, Gailloud P, Hagino R, Lai J, Bose A, Sit S. Multicenter experience with the Ruby Coil in the peripheral vasculature: preliminary results from the penumbra ace post market registry. J Vasc Interv Radiol 2014. [DOI: 10.1016/j.jvir.2013.12.441] [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: 10/25/2022] Open
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Fumagalli I, Faivre JC, Thureau S, Bibault JE, Diaz O, Leroy T, Pichon B, Riou O, Fournier C, Hannoun-Lévi JM, Peiffert D. État des lieux de la formation des internes français d’oncologie radiothérapie en curiethérapie. Cancer Radiother 2014; 18:28-34. [DOI: 10.1016/j.canrad.2013.07.150] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2013] [Revised: 07/19/2013] [Accepted: 07/24/2013] [Indexed: 12/01/2022]
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Thureau S, Challand T, Bibault JE, Biau J, Cervellera M, Diaz O, Faivre JC, Fumagalli I, Leroy T, Lescut N, Martin V, Pichon B, Riou O, Dubray B, Giraud P, Hennequin C. Delegation of medical tasks in French radiation oncology departments: Current situation and impact on residents’ training. Cancer Radiother 2013; 17:370-7. [DOI: 10.1016/j.canrad.2013.07.144] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Accepted: 07/15/2013] [Indexed: 11/15/2022]
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Oulmoudne N, Hatime M, Merle P, Diaz O, Mornex F, Mehiri S. Radiothérapie hépatique pour carcinome hépatocellulaire : analyse de la tolérance digestive haute, selon la localisation tumorale. Cancer Radiother 2013. [DOI: 10.1016/j.canrad.2013.06.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Diaz O, Lorchel F, Revault C, Mornex F. [Task sharing with radiotherapy technicians in image-guided radiotherapy]. Cancer Radiother 2013; 17:383-8. [PMID: 24007955 DOI: 10.1016/j.canrad.2013.07.138] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Accepted: 07/10/2013] [Indexed: 11/17/2022]
Abstract
The development of accelerators with on-board imaging systems now allows better target volumes reset at the time of irradiation (image-guided radiotherapy [IGRT]). However, these technological advances in the control of repositioning led to a multiplication of tasks for each actor in radiotherapy and increase the time available for the treatment, whether for radiotherapy technicians or radiation oncologists. As there is currently no explicit regulatory framework governing the use of IGRT, some institutional experiments show that a transfer is possible between radiation oncologists and radiotherapy technicians for on-line verification of image positioning. Initial training for every technical and drafting procedures within institutions will improve audit quality by reducing interindividual variability.
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Affiliation(s)
- O Diaz
- Service de radiothérapie, hospices civils de Lyon, CHU Lyon-Sud, 65, chemin du Grand-Revoyet, 69310 Pierre-Bénite, France; EMR 3738, université Claude-Bernard Lyon-1, domaine Rockefeller, 8, avenue Rockefeller, 69373 Lyon cedex 08, France.
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Rashidnasab A, Elangovan P, Yip M, Diaz O, Dance DR, Young KC, Wells K. Simulation and assessment of realistic breast lesions using fractal growth models. Phys Med Biol 2013; 58:5613-27. [DOI: 10.1088/0031-9155/58/16/5613] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Bouwman RW, Diaz O, van Engen RE, Young KC, den Heeten GJ, Broeders MJM, Veldkamp WJH, Dance DR. Phantoms for quality control procedures in digital breast tomosynthesis: dose assessment. Phys Med Biol 2013; 58:4423-38. [DOI: 10.1088/0031-9155/58/13/4423] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Tapia Y, Diaz O, Pizarro C, Segura R, Vines M, Zúñiga G, Moreno-Jiménez E. Atriplex atacamensis and Atriplex halimus resist As contamination in Pre-Andean soils (northern Chile). Sci Total Environ 2013; 450-451:188-196. [PMID: 23474264 DOI: 10.1016/j.scitotenv.2013.02.021] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2012] [Revised: 02/08/2013] [Accepted: 02/08/2013] [Indexed: 06/01/2023]
Abstract
The Pre-Andean area of Chile exhibits saline soils of volcanic origin naturally contaminated with arsenic (As), and we hypothesise that revegetation with resistant species may be a valid alternative for soil management in this area. Thus, the xerophytic and halophytic shrubs Atriplex halimus and Atriplex atacamensis were cultivated in containers for 90 days in Pre-Andean soil, As-soil, (111±19 mg As kg(-1), pH8.4±0.1) or control soil (12.7±1.1 mg As kg(-1), pH7.8±0.1) to evaluate As accumulation and resistance using stress bioindicators (chlorophylls, malondialdehyde (MDA) and total thiols). Sequential extraction of As-soil indicated that 52.3% of As was found in the most available fraction. The As distribution was significantly different between the species: A. halimus translocated the As to leaves, whilst A. atacamensis retained the As in roots. At 30 and 90 days, A. halimus showed similar As concentrations in the leaves (approximately 5.5 mg As kg(-1)), and As increased in stems and roots (up to 4.73 and 16.3 mg As kg(-1), respectively). In A. atacamensis, As concentration was lower (2.6 in leaves; 3.2 in stems and 6.9 in roots in mg As kg(-1)). Both species exhibited a high concentration of B in leaves (362-389 mg kg(-1)). If the plants are used for animal feed, it should be considered that A. halimus accumulates higher concentration of As and B in the leaves than A. atacamensis. Neither plant growth nor stress bioindicators were negatively affected by the high levels of available As, with the exception of MDA in the leaves of A. halimus. The results indicate that these plants resist contamination by arsenic, accumulating mainly the metalloid in the roots and can be recommended to generate plant cover in As-contaminated soils in the Pre-Andean region, under saline conditions controlled, preventing the dispersion of this metalloid via wind and leaching.
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Affiliation(s)
- Y Tapia
- Departamento de Ingeniería y Suelos, Universidad de Chile, 8820808 Santiago, Chile.
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Elmorabit B, Touch S, Hatime M, Tanguy R, Diaz O, Wautot V, Enachescu C, Couraud S, Mornex F. La radiothérapie stéréotaxique pulmonaire n’altère pas la fonction respiratoire des patients. Expérience du centre hospitalier Lyon-sud. Cancer Radiother 2012. [DOI: 10.1016/j.canrad.2012.07.003] [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: 10/27/2022]
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Hatime M, Elmorabit B, Touch S, Merle P, Tanguy R, Diaz O, Wautot V, Enachescu C, Elkhoti Y, Mornex F. Critères de tolérance du parenchyme hépatique cirrhotique non tumoral à l’association chimioembolisation−irradiation : recommandations possibles. Cancer Radiother 2012. [DOI: 10.1016/j.canrad.2012.07.014] [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: 11/16/2022]
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Diaz O, Chapet O, Rety F, Tychyj Pinel C. Évaluation par IRM et TEP au FDG de la réponse à la chimioradiothérapie des cancers du col utérin localement avancés. Cancer Radiother 2012. [DOI: 10.1016/j.canrad.2012.07.134] [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: 10/27/2022]
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Perrin-Cocon L, Diaz O, André P, Lotteau V. Modified lipoproteins provide lipids that modulate dendritic cell immune function. Biochimie 2012; 95:103-8. [PMID: 22959067 DOI: 10.1016/j.biochi.2012.08.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2012] [Accepted: 08/09/2012] [Indexed: 12/19/2022]
Abstract
Both physiological and pathological situations can result in biochemical changes of low-density lipoproteins (LDL). Because they can deliver signals to dendritic cells (DC), these modified lipoproteins now appear as regulators of the immune response. Among these modified lipoproteins, oxidized LDL (oxLDL) that accumulate during inflammatory conditions have been extensively studied. Numerous studies have shown that oxLDL induce the maturation of DC, enhancing their ability to activate IFNγ secretion by T cells. LDL treated by secreted phospholipase A(2) also promote DC maturation. Among the bioactive lipids generated by oxidation or phospholipase treatment of LDL, lysophosphatidylcholine (LPC) and some saturated fatty acids induce DC maturation whereas some unsaturated fatty acids or oxidized derivatives have opposite effects. Among other factors, the nuclear receptor peroxisome-proliferator activated receptor γ (PPARγ) plays a crucial role in this regulation. Non-modified lipoproteins also contribute to the regulation of DC function, suggesting that the balance between native and modified lipoproteins, as well as the biochemical nature of the LDL modifications, can regulate the activation threshold of DC. Here we discuss two pathological situations in which the impact of LDL modifications on inflammation and immunity could play an important role. During atherosclerosis, modified LDL accumulating in the arterial intima may interfere with DC maturation and function, promoting a Th1 immune response and a local inflammation favoring the development of the pathology. In patients chronically infected, the hepatitis C virus (HCV) interferes with lipoprotein metabolism resulting in the production of infectious modified lipoproteins. These lipo-viral-particles (LVP) are modified low-density lipoproteins containing viral material that can alter DC maturation and affect specific toll-like receptor signaling. In conclusion, lipoprotein modifications play an important role in the regulation of immunity by delivering signals of danger to DC and modulating their function.
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Muñoz L, Aguilera J, Rodriguez-Turienzo L, Cobos A, Diaz O. Characterization and microstructure of films made from mucilage of Salvia hispanica and whey protein concentrate. J FOOD ENG 2012. [DOI: 10.1016/j.jfoodeng.2012.02.031] [Citation(s) in RCA: 91] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Scholtes C, Ramière C, Rainteau D, Perrin-Cocon L, Wolf C, Humbert L, Carreras M, Guironnet-Paquet A, Zoulim F, Bartenschlager R, Lotteau V, André P, Diaz O. High plasma level of nucleocapsid-free envelope glycoprotein-positive lipoproteins in hepatitis C patients. Hepatology 2012; 56:39-48. [PMID: 22290760 DOI: 10.1002/hep.25628] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2011] [Accepted: 01/19/2012] [Indexed: 02/06/2023]
Abstract
UNLABELLED Hepatitis C virus (HCV) particles associate viral and lipoprotein moieties to form hybrid lipoviral particles (LVPs). Cell culture-produced HCV (HCVcc) and ex vivo-characterized LVPs primarily differ by their apolipoprotein (apo) B content, which is low for HCVcc, but high for LVPs. Recombinant nucleocapsid-free subviral LVPs are assembled and secreted by apoB-producing cell lines. To determine whether such subviral particles circulate in HCV-infected individuals, LVPs complexed with immunoglobulin were precipitated with protein A from low-density plasma fractions of 36 hepatitis C patients, and their lipid content, apolipoprotein profile, and viral composition were determined. HCV RNA in LVPs was quantified and molar ratios of apoB and HCV genome copy number were calculated. LVPs lipidome from four patients was determined via electrospray ionization/tandem mass spectrometry. Protein A-purified LVPs contained at least the envelope glycoprotein E2 and E2-specific antibodies. LVPs were present in every patient and were characterized by high lipid content, presence of apolipoproteins characteristic of triglyceride-rich lipoproteins (TRLs), HCV RNA, and viral glycoprotein. Importantly, save for four patients, LVPs fractions contained large amounts of apoB, with on average more than 1 × 10(6) apoB molecules per HCV RNA genome. Because there is one apoB molecule per TRL, this ratio suggested that most LVPs are nucleocapsid-free, envelope glycoprotein-containing subviral particles. LVPs and TRLs had similar composition of triacylglycerol and phospholipid classes. CONCLUSION LVPs are a mixed population of particles, comprising predominantly subviral particles that represent a distinct class of modified lipoproteins within the TRL family.
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Mornex F, Hatime M, Touch S, Elmorabit B, Pigne G, Enachescu C, Diaz O, Elkhoti Y. Radiotherapy of the pancreas: state of the art in 2012. Recent Results Cancer Res 2012; 196:89-103. [PMID: 23129368 DOI: 10.1007/978-3-642-31629-6_6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Affiliation(s)
- F Mornex
- Radiation Oncology Department, Centre Hospitalier Lyon Sud, Université Claude Bernard, Lyon, France.
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Romero A, Gonzalez V, Esteve A, Martro E, Matas L, Tural C, Pumarola T, Casanova A, Ferrer E, Caballero E, Ribera E, Margall N, Domingo P, Farre J, Puig T, Sauca M, Barrufet P, Amengual M, Navarro G, Navarro M, Vilaro J, Ortin X, Orti A, Pujol F, Prat JM, Massabeu A, Simo JM, Villaverde CA, Benitez MA, Garcia I, Diaz O, Becerra J, Ros R, Sala R, Rodrigo I, Miro JM, Casabona J. Identification of recent HIV-1 infection among newly diagnosed cases in Catalonia, Spain (2006-08). Eur J Public Health 2011; 22:802-8. [DOI: 10.1093/eurpub/ckr179] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Fumagalli I, Faivre JC, Bibault JE, Diaz O, Lévy A, Liem X, Riou O, Thureau S, Hannoun-Lévi JM, Peiffert D. Évaluation de la formation à la curiethérapie des jeunes oncologues radiothérapeutes français. Cancer Radiother 2011. [DOI: 10.1016/j.canrad.2011.07.178] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Tredaniel J, Mornex F, Barillot I, Diaz O, Hennequin C, Le Pechoux C, Lavole A, Giraud P, Souquet PJ, Teixeira L, Vaylet F, Zalcman G, Baudrin L, Morin F, Milleron B. Protocole IFCT 0803 – Étude de phase II évaluant l’association de cétuximab à une radiothérapie et chimiothérapie concomitante par cisplatine et pémétrexed dans le traitement des cancers bronchiques non à petites cellules non épidermoïdes de stade III, inopérables. Rev Mal Respir 2011; 28:51-7. [DOI: 10.1016/j.rmr.2010.06.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2010] [Accepted: 06/24/2010] [Indexed: 12/20/2022]
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Pécheur EI, Diaz O, Molle J, Icard V, Bonnafous P, Lambert O, André P. Morphological characterization and fusion properties of triglyceride-rich lipoproteins obtained from cells transduced with hepatitis C virus glycoproteins. J Biol Chem 2010; 285:25802-11. [PMID: 20551330 DOI: 10.1074/jbc.m110.131664] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
The density of hepatitis C virus (HCV) particles circulating in the blood of chronically infected patients and of cell-culture produced HCV is heterogeneous. Specific infectivity and fusion of low density particles are higher than those of high density particles. We recently characterized hybrid particles produced by Caco-2 colon or Huh-7.5 liver cells transduced with HCV E1 and E2 envelope glycoproteins. Caco-2-derived particles, called empty lipo-viral particles (eLVP), are composed of triglyceride-rich lipoproteins positive for apolipoproteins B (i.e. apoB100 and apoB48) and contain HCV E1 and E2. Here we aimed at characterizing the morphology and in vitro fusion properties of eLVP using electron microscopy and fluorescence spectroscopy. They displayed the aspect of beta-lipoproteins, and immunogold labeling confirmed the presence of apoB and HCV E1 and E2 at their surface. These particles are able to fuse with lipid bilayers (liposomes) in a fusion process leading to the coalescence of internal contents of triglyceride-rich lipoproteins particles and liposomes. Fusion was pH-dependent and could be inhibited by either Z-fFG, a peptide known to inhibit viral fusion, or by monoclonal antibodies directed against HCV E2 or the apolipoprotein moiety of the hybrid particle. Interestingly, particles derived from Huh-7.5 cells failed to display equivalent efficient fusion. Optimal fusion activity is, thus, observed when HCV envelope proteins are associated to apoB-positive hybrid particles. Our results, therefore, point to a crucial role of the E1 and E2 proteins in HCV fusion with a subtle interplay with the apolipoprotein part of eLVP.
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Affiliation(s)
- Eve-Isabelle Pécheur
- Institut de Biologie et Chimie des Protéines, UMR CNRS 5086, Université Lyon 1, IFR128 Lyon BioSciences Gerland, 69007 Lyon, France.
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Karmonik C, Diaz O, Grossman R, Klucznik R. In-Vivo Quantification of Wall Motion in Cerebral Aneurysms from 2D Cine Phase Contrast Magnetic Resonance Images. ROFO-FORTSCHR RONTG 2009; 182:140-50. [DOI: 10.1055/s-0028-1109670] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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De La Rosa D, Olivares S, Lima L, Diaz O, Moyano S, Bastías J, Muñoz O. Estimate of mercury and methyl mercury intake associated with fish consumption from Sagua la Grande River, Cuba. Food Additives and Contaminants: Part B 2009; 2:1-7. [DOI: 10.1080/02652030802609614] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Diaz O, Mazeron R, Martin E, Carrie C. [Toxicity of radiation therapy and antiangiogenics combination: a case report]. Cancer Radiother 2009; 13:205-8. [PMID: 19346145 DOI: 10.1016/j.canrad.2009.01.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2008] [Revised: 12/23/2008] [Accepted: 01/14/2009] [Indexed: 10/20/2022]
Abstract
The combined administration of antiangiogenic agents (AA) and radiation is being evaluated. No AA has yet received Marketing Authorization in this indication. However, they are widely used in medical oncology and criteria for stopping their administration in case of irradiation have not been defined. We report the case of a 63-year-old man experiencing grade 2 skin toxicity while on radiation treatment and sorafenib (400mg twice daily) for a metastatic lesion developing between the vastus medialis muscle and the cortical of the mid-diaphysis of the right femur. Toxicity occurred at 21Gy, for a total dose of 36Gy (12 fractions of 3Gy). Cutaneous symptoms rapidly disappeared after treatment discontinuation. Radiotherapy alone was resumed after a few days and the total dose could be delivered, with good tolerance. At 2-month follow-up, the intramuscular lesion had regressed. Several other cases of patients with poor tolerance to the association of AA and radiotherapy have been reported. Further studies of the effectiveness and tolerance of the combination treatment are needed before indications for AA can be extended to other diseases.
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Affiliation(s)
- O Diaz
- Service de radiothérapie, centre Léon-Bérard, 69008 Lyon, France.
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