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Sivagnanalingam U, Beatty P, Jacqueline C, Dracz M, Adams-Haduch J, Wang R, Yuan J, Finn O. A Nested Case-Control Study of Lung Cancer for Immune Biomarkers. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2021.10.166] [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: 11/27/2022]
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Asquier-Khati A, Chaumette T, Chauveau M, Roquilly A, Vourc’h M, Jacqueline C, Caillon J, Boutoille D, Asehnoune K, Gaborit B. Étude du rôle des lymphocytes T régulateurs exprimant le récepteur TNFα de type 2 (TNFR2) au cours du sepsis chez l’homme. Med Mal Infect 2020. [DOI: 10.1016/j.medmal.2020.06.259] [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: 11/29/2022]
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Roquilly A, Jacqueline C, Davieau M, Mollé A, Sadek A, Fourgeux C, Rooze P, Broquet A, Misme-Aucouturier B, Chaumette T, Vourc’h M, Cinotti R, Marec N, Gauttier V, McWilliam HEG, Altare F, Poschmann J, Villadangos JA, Asehnoune K. Author Correction: Alveolar macrophages are epigenetically altered after inflammation, leading to long-term lung immunoparalysis. Nat Immunol 2020; 21:962. [DOI: 10.1038/s41590-020-0739-9] [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: 11/10/2022]
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Roquilly A, Jacqueline C, Davieau M, Mollé A, Sadek A, Fourgeux C, Rooze P, Broquet A, Misme-Aucouturier B, Chaumette T, Vourc'h M, Cinotti R, Marec N, Gauttier V, McWilliam HEG, Altare F, Poschmann J, Villadangos JA, Asehnoune K. Alveolar macrophages are epigenetically altered after inflammation, leading to long-term lung immunoparalysis. Nat Immunol 2020; 21:636-648. [PMID: 32424365 DOI: 10.1038/s41590-020-0673-x] [Citation(s) in RCA: 111] [Impact Index Per Article: 27.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Accepted: 03/30/2020] [Indexed: 12/21/2022]
Abstract
Sepsis and trauma cause inflammation and elevated susceptibility to hospital-acquired pneumonia. As phagocytosis by macrophages plays a critical role in the control of bacteria, we investigated the phagocytic activity of macrophages after resolution of inflammation. After resolution of primary pneumonia, murine alveolar macrophages (AMs) exhibited poor phagocytic capacity for several weeks. These paralyzed AMs developed from resident AMs that underwent an epigenetic program of tolerogenic training. Such adaptation was not induced by direct encounter of the pathogen but by secondary immunosuppressive signals established locally upon resolution of primary infection. Signal-regulatory protein α (SIRPα) played a critical role in the establishment of the microenvironment that induced tolerogenic training. In humans with systemic inflammation, AMs and also circulating monocytes still displayed alterations consistent with reprogramming six months after resolution of inflammation. Antibody blockade of SIRPα restored phagocytosis in monocytes of critically ill patients in vitro, which suggests a potential strategy to prevent hospital-acquired pneumonia.
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Affiliation(s)
- Antoine Roquilly
- Université de Nantes, EA3826 Thérapeutiques Anti-Infectieuses, Institut de Recherche en Santé 2 Nantes Biotech, Nantes, France. .,Université de Nantes, CHU Nantes, Pôle Anesthésie-Réanimation, Service d'Anesthésie Réanimation Chirurgicale, Hôtel Dieu, Nantes, France. .,Department of Microbiology and Immunology, Peter Doherty Institute of Infection and Immunity, The University of Melbourne, Parkville, Victoria, Australia.
| | - Cedric Jacqueline
- Université de Nantes, EA3826 Thérapeutiques Anti-Infectieuses, Institut de Recherche en Santé 2 Nantes Biotech, Nantes, France
| | - Marion Davieau
- Université de Nantes, EA3826 Thérapeutiques Anti-Infectieuses, Institut de Recherche en Santé 2 Nantes Biotech, Nantes, France
| | - Alice Mollé
- Université de Nantes, CHU Nantes, Inserm, Centre de Recherche en Transplantation et Immunologie, UMR1064, ITUN, Nantes, France
| | - Abderrahmane Sadek
- Université de Nantes, CHU Nantes, Inserm, Centre de Recherche en Transplantation et Immunologie, UMR1064, ITUN, Nantes, France.,Department of Biology, Faculty of Science, Moulay Ismail University, Zitoune, Meknes, Morocco
| | - Cynthia Fourgeux
- Université de Nantes, CHU Nantes, Inserm, Centre de Recherche en Transplantation et Immunologie, UMR1064, ITUN, Nantes, France
| | - Paul Rooze
- Université de Nantes, EA3826 Thérapeutiques Anti-Infectieuses, Institut de Recherche en Santé 2 Nantes Biotech, Nantes, France.,Université de Nantes, CHU Nantes, Pôle Anesthésie-Réanimation, Service d'Anesthésie Réanimation Chirurgicale, Hôtel Dieu, Nantes, France
| | - Alexis Broquet
- Université de Nantes, EA3826 Thérapeutiques Anti-Infectieuses, Institut de Recherche en Santé 2 Nantes Biotech, Nantes, France
| | - Barbara Misme-Aucouturier
- Université de Nantes, EA3826 Thérapeutiques Anti-Infectieuses, Institut de Recherche en Santé 2 Nantes Biotech, Nantes, France
| | - Tanguy Chaumette
- Université de Nantes, EA3826 Thérapeutiques Anti-Infectieuses, Institut de Recherche en Santé 2 Nantes Biotech, Nantes, France
| | - Mickael Vourc'h
- Université de Nantes, EA3826 Thérapeutiques Anti-Infectieuses, Institut de Recherche en Santé 2 Nantes Biotech, Nantes, France.,Université de Nantes, CHU Nantes, Pôle Anesthésie-Réanimation, Service d'Anesthésie Réanimation Chirurgicale, Hôtel Dieu, Nantes, France
| | - Raphael Cinotti
- Université de Nantes, CHU Nantes, Pôle Anesthésie-Réanimation, Service d'Anesthésie Réanimation Chirurgicale, Hôtel Dieu, Nantes, France
| | - Nadege Marec
- Plateforme Cytocell, SFR François Bonamy, Nantes, France
| | - Vanessa Gauttier
- Université de Nantes, CHU Nantes, Inserm, Centre de Recherche en Transplantation et Immunologie, UMR1064, ITUN, Nantes, France
| | - Hamish E G McWilliam
- Department of Microbiology and Immunology, Peter Doherty Institute of Infection and Immunity, The University of Melbourne, Parkville, Victoria, Australia.,Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria, Australia
| | - Frederic Altare
- CRCINA, INSERM, Université de Nantes, CHU de Nantes, Nantes, France
| | - Jeremie Poschmann
- Université de Nantes, CHU Nantes, Inserm, Centre de Recherche en Transplantation et Immunologie, UMR1064, ITUN, Nantes, France.
| | - Jose A Villadangos
- Department of Microbiology and Immunology, Peter Doherty Institute of Infection and Immunity, The University of Melbourne, Parkville, Victoria, Australia. .,Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria, Australia.
| | - Karim Asehnoune
- Université de Nantes, EA3826 Thérapeutiques Anti-Infectieuses, Institut de Recherche en Santé 2 Nantes Biotech, Nantes, France. .,Université de Nantes, CHU Nantes, Pôle Anesthésie-Réanimation, Service d'Anesthésie Réanimation Chirurgicale, Hôtel Dieu, Nantes, France.
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Leroy AG, Jacqueline C, Boutoille D, Davieau M, Caillon J. Évaluation des bactériophages dans un modèle murin d’infection respiratoire chronique : vers une alternative thérapeutique prometteuse ? Med Mal Infect 2018. [DOI: 10.1016/j.medmal.2018.04.336] [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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Jacqueline C, Davieau M, Broquet A, Misme B, Chaumette T, Vourc’h M, Cinotti R, Villadangos J, Asehnoune K, Roquilly A. La modulation in situ des fonctions phagocytaires des macrophages alvéolaires (MA) résidents après la résolution d’une infection primaire induit une sensibilité prolongée à une infection secondaire. Med Mal Infect 2018. [DOI: 10.1016/j.medmal.2018.04.110] [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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Vourc'h M, Roquilly A, Broquet A, David G, Hulin P, Jacqueline C, Caillon J, Retiere C, Asehnoune K. Exoenzyme T Plays a Pivotal Role in the IFN-γ Production after Pseudomonas Challenge in IL-12 Primed Natural Killer Cells. Front Immunol 2017; 8:1283. [PMID: 29067027 PMCID: PMC5641345 DOI: 10.3389/fimmu.2017.01283] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [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: 06/21/2017] [Accepted: 09/25/2017] [Indexed: 11/22/2022] Open
Abstract
Pseudomonas aeruginosa (PA) expresses the type III secretion system (T3SS) and effector exoenzymes that interfere with intracellular pathways. Natural killer (NK) cells play a key role in antibacterial immunity and their activation is highly dependent on IL-12 produced by myeloid cells. We studied PA and NK cell interactions and the role of IL-12 using human peripheral blood mononuclear cells, sorted human NK cells, and a human NK cell line (NK92). We used a wild-type (WT) strain of PA (PAO1) or isogenic PA-deleted strains to delineate the role of T3SS and exoenzymes. Our hypotheses were tested in vivo in a PA-pneumonia mouse model. Human NK cells or NK92 cell line produced low levels of IFN-γ in response to PA without IL-12 stimulation, whereas PA significantly increased IFN-γ after IL-12 priming. The modulation of IFN-γ production by PA required bacteria-to-cell contact. Among T3SS effectors, exoenzyme T (ExoT) upregulates IFN-γ production and control ERK activation. In vivo, ExoT also increases IFN-γ levels and the percentage of IFN-γ+ NK cells in lungs during PA pneumonia, confirming in vitro data. In conclusion, our results suggest that T3SS could modulate the production of IFN-γ by NK cells after PA infection through ERK activation.
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Affiliation(s)
- Mickael Vourc'h
- Laboratoire UPRES EA3826 «Thérapeutiques cliniques et expérimentales des infections», IRS2 - Nantes Biotech, Université de Nantes, Nantes, France.,Intensive Care Unit, Anesthesia and Critical Care Department, Hôtel Dieu, University Hospital of Nantes, Nantes, France
| | - Antoine Roquilly
- Laboratoire UPRES EA3826 «Thérapeutiques cliniques et expérimentales des infections», IRS2 - Nantes Biotech, Université de Nantes, Nantes, France.,Intensive Care Unit, Anesthesia and Critical Care Department, Hôtel Dieu, University Hospital of Nantes, Nantes, France
| | - Alexis Broquet
- Laboratoire UPRES EA3826 «Thérapeutiques cliniques et expérimentales des infections», IRS2 - Nantes Biotech, Université de Nantes, Nantes, France
| | - Gaelle David
- Etablissement Français du Sang, Nantes, France.,CRCINA, INSERM U1232, CNRS, Université d'Angers, Université de Nantes, Nantes, France
| | - Philippe Hulin
- MicroPICell, Cell and Tissue Imaging Core, UMS Inserm 016/CNRS 3356/FED 4203, Villejuif, France
| | - Cedric Jacqueline
- Laboratoire UPRES EA3826 «Thérapeutiques cliniques et expérimentales des infections», IRS2 - Nantes Biotech, Université de Nantes, Nantes, France
| | - Jocelyne Caillon
- Laboratoire UPRES EA3826 «Thérapeutiques cliniques et expérimentales des infections», IRS2 - Nantes Biotech, Université de Nantes, Nantes, France
| | - Christelle Retiere
- Etablissement Français du Sang, Nantes, France.,CRCINA, INSERM U1232, CNRS, Université d'Angers, Université de Nantes, Nantes, France
| | - Karim Asehnoune
- Laboratoire UPRES EA3826 «Thérapeutiques cliniques et expérimentales des infections», IRS2 - Nantes Biotech, Université de Nantes, Nantes, France.,Intensive Care Unit, Anesthesia and Critical Care Department, Hôtel Dieu, University Hospital of Nantes, Nantes, France
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8
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Roquilly A, McWilliam HEG, Jacqueline C, Tian Z, Cinotti R, Rimbert M, Wakim L, Caminschi I, Lahoud MH, Belz GT, Kallies A, Mintern JD, Asehnoune K, Villadangos JA. Local Modulation of Antigen-Presenting Cell Development after Resolution of Pneumonia Induces Long-Term Susceptibility to Secondary Infections. Immunity 2017; 47:135-147.e5. [PMID: 28723546 DOI: 10.1016/j.immuni.2017.06.021] [Citation(s) in RCA: 112] [Impact Index Per Article: 16.0] [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: 12/16/2016] [Revised: 04/15/2017] [Accepted: 05/08/2017] [Indexed: 12/11/2022]
Abstract
Lung infections cause prolonged immune alterations and elevated susceptibility to secondary pneumonia. We found that, after resolution of primary viral or bacterial pneumonia, dendritic cells (DC), and macrophages exhibited poor antigen-presentation capacity and secretion of immunogenic cytokines. Development of these "paralyzed" DCs and macrophages depended on the immunosuppressive microenvironment established upon resolution of primary infection, which involved regulatory T (Treg) cells and the cytokine TGF-β. Paralyzed DCs secreted TGF-β and induced local Treg cell accumulation. They also expressed lower amounts of IRF4, a transcription factor associated with increased antigen-presentation capacity, and higher amounts of Blimp1, a transcription factor associated with tolerogenic functions, than DCs present during primary infection. Blimp1 expression in DC of humans suffering sepsis or trauma correlated with severity and complicated outcomes. Our findings describe mechanisms underlying sepsis- and trauma-induced immunosuppression, reveal prognostic markers of susceptibility to secondary infections and identify potential targets for therapeutic intervention.
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Affiliation(s)
- Antoine Roquilly
- Department of Microbiology and Immunology, Doherty Institute of Infection and Immunity, The University of Melbourne, Parkville, Victoria 3010, Australia; EA3826 Thérapeutiques Anti-Infectieuses, Institut de Recherche en Santé 2 Nantes Biotech, Medical University of Nantes, 44000 Nantes, France; Surgical Intensive Care Unit, Hotel Dieu, University Hospital of Nantes, 44093 Nantes, France
| | - Hamish E G McWilliam
- Department of Microbiology and Immunology, Doherty Institute of Infection and Immunity, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Cedric Jacqueline
- EA3826 Thérapeutiques Anti-Infectieuses, Institut de Recherche en Santé 2 Nantes Biotech, Medical University of Nantes, 44000 Nantes, France
| | - Zehua Tian
- Department of Microbiology and Immunology, Doherty Institute of Infection and Immunity, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Raphael Cinotti
- EA3826 Thérapeutiques Anti-Infectieuses, Institut de Recherche en Santé 2 Nantes Biotech, Medical University of Nantes, 44000 Nantes, France; Surgical Intensive Care Unit, Hotel Dieu, University Hospital of Nantes, 44093 Nantes, France
| | - Marie Rimbert
- CHU Nantes, Laboratoire d'immunologie, Center for Immuno-Monitoring Nantes Atlantic (CIMNA), Laboratoire d'Immunologie, CHU de Nantes, Nantes, France
| | - Linda Wakim
- Department of Microbiology and Immunology, Doherty Institute of Infection and Immunity, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Irina Caminschi
- Infection & Immunity Program, Monash Biomedicine Discovery Institute and Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC 3800, Australia
| | - Mireille H Lahoud
- Infection & Immunity Program, Monash Biomedicine Discovery Institute and Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC 3800, Australia
| | - Gabrielle T Belz
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria 3052, Australia; The Department of Medical Biology, University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Axel Kallies
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria 3052, Australia; The Department of Medical Biology, University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Justine D Mintern
- Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Karim Asehnoune
- EA3826 Thérapeutiques Anti-Infectieuses, Institut de Recherche en Santé 2 Nantes Biotech, Medical University of Nantes, 44000 Nantes, France; Surgical Intensive Care Unit, Hotel Dieu, University Hospital of Nantes, 44093 Nantes, France
| | - Jose A Villadangos
- Department of Microbiology and Immunology, Doherty Institute of Infection and Immunity, The University of Melbourne, Parkville, Victoria 3010, Australia; Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria 3010, Australia.
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9
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Crémet L, Broquet A, Jacqueline C, Chaillou C, Asehnoune K, Corvec S, Caroff N. Innate immune evasion of Escherichia coli clinical strains from orthopedic implant infections. Eur J Clin Microbiol Infect Dis 2016; 35:993-9. [PMID: 27039343 DOI: 10.1007/s10096-016-2628-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Accepted: 03/16/2016] [Indexed: 01/11/2023]
Abstract
Escherichia coli is one of the first causes of Gram-negative orthopedic implant infections (OII). Those infections, usually hematogenous, mostly originate from the urinary tract. We investigated the strategies developed by E. coli in this context to evade host innate immune responses, i.e. complement and polymorphonuclear neutrophils (PMN). Twenty strains from OII were compared with 20 strains from bacteremia in patients with non-infected orthopedic implant. In both groups, 6/20 (30 %) strains lysed PMNs, due to the production of the pore-forming toxin α-hemolysin (HlyA). For the others, resistance to phagocytic killing by PMN was not significantly different between both groups. In contrast, resistance to complement-mediated serum killing was significantly higher in OII strains than in the others (65 % vs 10 %; P <0.001). In E. coli, different mechanisms have been involved in complement resistance. Here, serum resistance was not linked to a group 2 capsule, or a loss of outer membrane permeability, or the recruitment of the complement inhibitor C4bp, but was significantly associated with the synthesis of long-chain LPS, regardless of the O-antigen. Thus, serum resistance could promote seeding of peri-implant tissues by helping E. coli to either persist in blood and reach the site of infection or overcome localized complement activation.
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Affiliation(s)
- L Crémet
- UFR de Médecine, EA3826, Thérapeutiques cliniques et expérimentales des infections, Université de Nantes, 1 rue G. Veil, 44000, Nantes, France.,Pôle de Biologie, Service de Bactériologie-Hygiène, CHU de Nantes, France
| | - A Broquet
- UFR de Médecine, EA3826, Thérapeutiques cliniques et expérimentales des infections, Université de Nantes, 1 rue G. Veil, 44000, Nantes, France
| | - C Jacqueline
- UFR de Médecine, EA3826, Thérapeutiques cliniques et expérimentales des infections, Université de Nantes, 1 rue G. Veil, 44000, Nantes, France
| | - C Chaillou
- UFR de Médecine, EA3826, Thérapeutiques cliniques et expérimentales des infections, Université de Nantes, 1 rue G. Veil, 44000, Nantes, France
| | - K Asehnoune
- UFR de Médecine, EA3826, Thérapeutiques cliniques et expérimentales des infections, Université de Nantes, 1 rue G. Veil, 44000, Nantes, France.,Pôle Anesthésie Réanimation, Service d'Anesthésie Réanimation Chirurgicale, CHU de Nantes, France
| | - S Corvec
- UFR de Médecine, EA3826, Thérapeutiques cliniques et expérimentales des infections, Université de Nantes, 1 rue G. Veil, 44000, Nantes, France.,Pôle de Biologie, Service de Bactériologie-Hygiène, CHU de Nantes, France
| | - N Caroff
- UFR de Médecine, EA3826, Thérapeutiques cliniques et expérimentales des infections, Université de Nantes, 1 rue G. Veil, 44000, Nantes, France.
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Martin JC, Bériou G, Heslan M, Bossard C, Jarry A, Abidi A, Hulin P, Ménoret S, Thinard R, Anegon I, Jacqueline C, Lardeux B, Halary F, Renauld JC, Bourreille A, Josien R. IL-22BP is produced by eosinophils in human gut and blocks IL-22 protective actions during colitis. Mucosal Immunol 2016; 9:539-49. [PMID: 26329427 DOI: 10.1038/mi.2015.83] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Accepted: 07/31/2015] [Indexed: 02/06/2023]
Abstract
Crohn's disease and ulcerative colitis, the two major forms of inflammatory bowel diseases (IBDs), are characterized by high levels of IL-22 production. Rodent studies revealed that this cytokine is protective during colitis but whether this is true in IBDs is unclear. We show here that levels of the soluble inhibitor of IL-22, interleukin 22-binding protein (IL-22BP), are significantly enhanced during IBDs owing to increased numbers of IL-22BP-producing eosinophils, that we unexpectedly identify as the most abundant source of IL-22BP protein in human gut. In addition, using IL-22BP-deficient rats, we confirm that endogenous IL-22BP is effective at blocking protective actions of IL-22 during acute colitis. In conclusion, our study provides new important insights regarding the biology of IL-22 and IL-22BP in the gut and indicates that protective actions of IL-22 are likely to be suboptimal in IBDs thus making IL-22BP a new relevant therapeutic target.
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Affiliation(s)
- J C Martin
- INSERM Center for Research in Transplantation and Immunology, UMR1064, ITUN, Nantes, France
- Université de Nantes, Faculté de Médecine, Nantes, France
- CHU Nantes, Laboratoire d'Immunologie, Nantes, France
| | - G Bériou
- INSERM Center for Research in Transplantation and Immunology, UMR1064, ITUN, Nantes, France
| | - M Heslan
- INSERM Center for Research in Transplantation and Immunology, UMR1064, ITUN, Nantes, France
| | - C Bossard
- Université de Nantes, Faculté de Médecine, Nantes, France
- EA4273 Biometadys, Faculté de Médecine, Université de Nantes, Nantes, France
- CHU Nantes, Laboratoire d'anatomopathologie, Nantes, France
| | - A Jarry
- EA4273 Biometadys, Faculté de Médecine, Université de Nantes, Nantes, France
| | - A Abidi
- INSERM Center for Research in Transplantation and Immunology, UMR1064, ITUN, Nantes, France
| | - P Hulin
- Plateforme MicroPICell, SFR santé, Nantes, France
| | - S Ménoret
- INSERM Center for Research in Transplantation and Immunology, UMR1064, ITUN, Nantes, France
| | - R Thinard
- INSERM Center for Research in Transplantation and Immunology, UMR1064, ITUN, Nantes, France
| | - I Anegon
- INSERM Center for Research in Transplantation and Immunology, UMR1064, ITUN, Nantes, France
| | - C Jacqueline
- EA3826, Faculté de Médecine, Université de Nantes, Nantes, France
| | - B Lardeux
- Institut des Maladies de l'Appareil Digestif - IMAD, INSERM UMR913, Nantes, France
| | - F Halary
- INSERM Center for Research in Transplantation and Immunology, UMR1064, ITUN, Nantes, France
| | - J-C Renauld
- Ludwig Institute for Cancer Research, Brussels, Belgium
- Institut de Duve, Université catholique de Louvain, Brussels, Belgium
| | - A Bourreille
- Institut des Maladies de l'Appareil Digestif - IMAD, INSERM UMR913, Nantes, France
- Institut des Maladies de l'Appareil Digestif - IMAD, INSERM CIC-04, CHU Nantes, Nantes, France
| | - R Josien
- INSERM Center for Research in Transplantation and Immunology, UMR1064, ITUN, Nantes, France
- Université de Nantes, Faculté de Médecine, Nantes, France
- CHU Nantes, Laboratoire d'Immunologie, Nantes, France
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11
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Revest M, Jacqueline C, Boudjemaa R, Caillon J, Le Mabecque V, Breteche A, Steenkeste K, Tattevin P, Potel G, Michelet C, Fontaine-Aupart MP, Boutoille D. New in vitro and in vivo models to evaluate antibiotic efficacy in Staphylococcus aureus prosthetic vascular graft infection. J Antimicrob Chemother 2016; 71:1291-9. [PMID: 26851611 DOI: 10.1093/jac/dkv496] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Accepted: 12/19/2015] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVE Prosthetic vascular graft infection (PVGI) is an emerging disease, mostly caused by staphylococci, with limited data regarding efficacy of current antistaphylococcal agents. We aimed to assess the efficacy of different antibiotic regimens. METHODS Six different strains of MSSA and MRSA were used. We compared results of minimal biofilm inhibitory and eradicating concentrations (MBICs and MBECs) obtained with a Calgary Biofilm Pin Lid Device (CBPD) with those yielded by an original Dacron(®)-related minimal inhibitory and eradicating concentration measure model. We then used a murine model of Staphylococcus aureus vascular prosthetic material infection to evaluate efficacy of different antibiotic regimens: vancomycin and daptomycin combined or not with rifampicin for MRSA and the same groups with cloxacillin and cloxacillin combined with rifampicin for MSSA. RESULTS We demonstrated that classical measures of MBICs and MBECs obtained with a CPBD could overestimate the decrease in antibiotic susceptibility in material-related infections and that the nature of the support used might influence the measure of biofilm susceptibility, since results yielded by our Dacron(®)-related minimal eradicating assay were lower than those found with a plastic device. In our in vivo model, we showed that daptomycin was significantly more bactericidal than comparators for some strains of MRSA or MSSA but not for all. For the majority of strains, it was as efficient as comparators. The addition of rifampicin to daptomycin did not enhance daptomycin efficacy. CONCLUSIONS Despite the heterogeneity of results according to bacterial strains, these innovative models represent an option to better evaluate the in vitro efficacy of antibiotics on Dacron(®)-related biofilm S. aureus infections, and to screen different antibiotic regimens in a mouse model of PVGIs.
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Affiliation(s)
- M Revest
- Université Nantes, Faculté Médecine EA3826 Nantes, France CHU Rennes Infectious Diseases and Intensive Care Unit, Pontchaillou Hospital, 35033 Rennes Cedex, France CIC Inserm 1414, Rennes 1 University, Pontchaillou Hospital, 35033 Rennes Cedex, France
| | - C Jacqueline
- Université Nantes, Faculté Médecine EA3826 Nantes, France
| | - R Boudjemaa
- Institut des Sciences Moléculaires Orsay, CNRS, Université Paris-Sud, 91405 Orsay, France
| | - J Caillon
- Université Nantes, Faculté Médecine EA3826 Nantes, France
| | - V Le Mabecque
- Université Nantes, Faculté Médecine EA3826 Nantes, France
| | - A Breteche
- Université Nantes, Faculté Médecine EA3826 Nantes, France
| | - K Steenkeste
- Institut des Sciences Moléculaires Orsay, CNRS, Université Paris-Sud, 91405 Orsay, France
| | - P Tattevin
- CHU Rennes Infectious Diseases and Intensive Care Unit, Pontchaillou Hospital, 35033 Rennes Cedex, France CIC Inserm 1414, Rennes 1 University, Pontchaillou Hospital, 35033 Rennes Cedex, France
| | - G Potel
- Université Nantes, Faculté Médecine EA3826 Nantes, France
| | - C Michelet
- CHU Rennes Infectious Diseases and Intensive Care Unit, Pontchaillou Hospital, 35033 Rennes Cedex, France CIC Inserm 1414, Rennes 1 University, Pontchaillou Hospital, 35033 Rennes Cedex, France
| | - M P Fontaine-Aupart
- Institut des Sciences Moléculaires Orsay, CNRS, Université Paris-Sud, 91405 Orsay, France
| | - D Boutoille
- Université Nantes, Faculté Médecine EA3826 Nantes, France CHU Nantes, Infectious Diseases Unit, Hôtel Dieu, Nantes, France
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Roquilly A, Broquet A, Jacqueline C, Gautreau L, Segain JP, de Coppet P, Caillon J, Altare F, Josien R, Asehnoune K. Toll-like receptor-4 agonist in post-haemorrhage pneumonia: role of dendritic and natural killer cells. Eur Respir J 2013; 42:1365-78. [PMID: 23314895 DOI: 10.1183/09031936.00152612] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Haemorrhage-induced immunosuppression has been linked to nosocomial infections. We assessed the impact of monophosphoryl lipid A, a Toll/interleukin-1 receptor-domain-containing adaptor protein inducing interferon-biased Toll-like receptor-4 agonist currently used as a vaccine adjuvant in humans, on post-haemorrhage susceptibility to infection. We used a mouse model of post-haemorrhage pneumonia induced by methicillin-susceptible Staphylococcus aureus. Monophosphoryl lipid A was administered intravenously after haemorrhage and before pneumonia onset. Haemorrhage altered survival rate, increased lung damage (neutrophil accumulation, oedema and cytokine release) and altered the functions of dendritic and natural killer cells. Here, we show that monophosphoryl lipid A decreased systemic dissemination of S. aureus and dampened inflammatory lung lesions. Monophosphoryl lipid A partially restored the capacity for antigen presentation and the transcriptional activity in dendritic cells. Monophosphoryl lipid A did not restore the interferon-γ mRNA but prevented interleukin-10 mRNA overexpression in natural killer cells compared with untreated mice. Ex vivo monophosphoryl lipid A-stimulated dendritic cells or natural killer cells harvested from haemorrhaged animals were adoptively transferred into mice undergoing post-haemorrhage pneumonia. Stimulated dendritic cells (but not stimulated natural killer cells) improved the survival rate compared with mice left untreated. In vivo depletion of natural killer cells decreased survival rate of monophosphoryl lipid A-treated mice. Dendritic and natural killer cells are critically involved in the beneficial effects of monophosphoryl lipid A within post-haemorrhage pneumonia.
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Jacqueline C, Roquilly A, Desessard C, Boutoille D, Broquet A, Le Mabecque V, Amador G, Potel G, Caillon J, Asehnoune K. Efficacy of ceftolozane in a murine model of Pseudomonas aeruginosa acute pneumonia: in vivo antimicrobial activity and impact on host inflammatory response. J Antimicrob Chemother 2012; 68:177-83. [DOI: 10.1093/jac/dks343] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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14
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Dubé L, Caillon J, Jacqueline C, Bugnon D, Potel G, Asseray N. The optimal aminoglycoside and its dosage for the treatment of severe Enterococcus faecalis infection. An experimental study in the rabbit endocarditis model. Eur J Clin Microbiol Infect Dis 2012; 31:2545-7. [DOI: 10.1007/s10096-012-1594-x] [Citation(s) in RCA: 10] [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] [Received: 12/27/2011] [Accepted: 02/14/2012] [Indexed: 01/24/2023]
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15
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Homer L, Launay E, Joram N, Jacqueline C, Jarreau PH, Caillon J, Moyon T, Branger B, Potel G, Roze JC, Méhats C, Gras-Leguen C. Antenatal phosphodiesterase 4 inhibition restores postnatal growth and pulmonary development in a model of chorioamnionitis in rabbits. J Pharmacol Exp Ther 2011; 340:620-8. [PMID: 22160266 DOI: 10.1124/jpet.111.179085] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Chorioamnionitis is implicated in the pathophysiology of bronchopulmonary disease, and the associated inflammatory response is responsible for adverse effects on alveolar development. The aim of this work was to analyze the effects of a phosphodiesterase 4 (PDE4)-selective inhibitor, rolipram (a modulator of the inflammatory response), in an experimental model of chorioamnionitis on pulmonary development and on the processes of infection and inflammation. Rabbit mothers were assigned to four groups: 1) saline serum inoculation (controls); 2) Escherichia coli intrauterine inoculation (C+); 3) rolipram infusion (R+); and 4) E. coli inoculation + rolipram infusion (C+R+). High rates of morbility and mortality were noticed in mothers and pups (5 of 13 pregnant rabbits in groups with rolipram). Alveolar development, inflammation, and infection were analyzed in pups at day 0 and day 5. At day 0, in the context of chorioamnionitis, rolipram significantly decreased birth weight (p < 0.01) relative to that of controls (p < 0.05). At day 5, weight normalized in group C+R+ but not in group C+ relative to controls (p < 0.001); moreover, alveolar airspace volume was preserved in group C+R+ but not in group C+ (p < 0.05). Interstitial volume decreased in group C+ versus controls (p < 0.05) but was preserved in group C+R+. Specific alveolar area was not significantly modified by rolipram. No significant difference was found concerning bronchoalveolar lavage cellularity, and all blood cultures remained sterile. In this model of impaired alveologenesis, rolipram significantly preserved specific alveolar density. However, PDE4 inhibition induced antenatal fetal demise and growth retardation.
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Affiliation(s)
- L Homer
- Centre Hospitalier Universitaire Brest, Service de Gynécologie Obstétrique et Médecine de la Reproduction, Brest, France
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16
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Gaudin A, Amador Del Valle G, Hamel A, Le Mabecque V, Miegeville AF, Potel G, Caillon J, Jacqueline C. A new experimental model of acute osteomyelitis due to methicillin-resistant Staphylococcus aureus in rabbit. Lett Appl Microbiol 2011; 52:253-7. [DOI: 10.1111/j.1472-765x.2010.02992.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Lefebvre M, Jacqueline C, Amador G, Le Mabecque V, Miegeville A, Potel G, Caillon J, Asseray N. Efficacy of daptomycin combined with rifampicin for the treatment of experimental meticillin-resistant Staphylococcus aureus (MRSA) acute osteomyelitis. Int J Antimicrob Agents 2010; 36:542-4. [PMID: 20851576 DOI: 10.1016/j.ijantimicag.2010.07.008] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2009] [Revised: 06/27/2010] [Accepted: 07/12/2010] [Indexed: 10/19/2022]
Abstract
Daptomycin exhibits rapid bactericidal activity against Gram-positive organisms, including meticillin-resistant Staphylococcus aureus (MRSA). Daptomycin in combination with rifampicin needs to be assessed in bone infection. An MRSA acute osteomyelitis model was used. Daptomycin and vancomycin were compared, alone or in combination with rifampicin, over 4 days. Surviving bacteria were counted in bone, bone marrow and joint fluid. Vancomycin and daptomycin as single therapies were ineffective, but both combinations were significantly more effective than the corresponding monotherapy. Combination of daptomycin and rifampicin could prevent S. aureus from developing resistance. This combination could be a useful alternative to treat MRSA osteomyelitis at an early stage.
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Affiliation(s)
- M Lefebvre
- Université de Nantes, Faculté de Médecine, EA3826, 1 rue Gaston Veil, F-44035 Nantes, France
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Grossi O, Caillon J, Arvieux C, Jacqueline C, Bugnon D, Potel G, Hamel A. In vivo efficacy of moxifloxacin compared with cloxacillin and vancomycin in a Staphylococcus aureus rabbit arthritis experimental model. Antimicrob Agents Chemother 2007; 51:3401-3. [PMID: 17576849 PMCID: PMC2043244 DOI: 10.1128/aac.01520-06] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We investigated the efficacies of moxifloxacin, cloxacillin, and vancomycin in a rabbit model of Staphylococcus aureus arthritis. No significant difference between therapeutic regimens was observed after a 7-day treatment. Oral moxifloxacin could be a suitable alternative to standard parenteral therapy for S. aureus arthritis.
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Affiliation(s)
- Olivier Grossi
- Université de Nantes, Nantes Atlantique Universités, Thérapeutiques Cliniques et Expérimentales des Infections, EA3826, UFR Médecine, Nantes, France
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Jacqueline C, Caillon J, Grossi O, Le Mabecque V, Miegeville AF, Bugnon D, Batard E, Potel G. In vitro and in vivo assessment of linezolid combined with ertapenem: a highly synergistic combination against methicillin-resistant Staphylococcus aureus. Antimicrob Agents Chemother 2006; 50:2547-9. [PMID: 16801442 PMCID: PMC1489782 DOI: 10.1128/aac.01501-05] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Linezolid in combination with ertapenem showed in vitro synergy against methicillin-resistant Staphylococcus aureus strains. We confirmed this interaction in vivo by using a rabbit endocarditis experimental model and simulation of the human pharmacokinetics in animals for both antibiotics. Linezolid plus ertapenem exhibited highly synergistic activity in vivo after 4 days of treatment.
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Affiliation(s)
- Cedric Jacqueline
- Laboratoire d'Antibiologie (UPRES EA 3826), UER de Médecine, 44035 Nantes, Cedex 01, France
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Grandière-Pérez L, Jacqueline C, Lemabecque V, Patey O, Potel G, Caillon J. Eagle Effect inCorynebacterium diphtheriae. J Infect Dis 2005; 191:2118-20. [PMID: 15897998 DOI: 10.1086/430350] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2004] [Accepted: 01/18/2005] [Indexed: 11/03/2022] Open
Abstract
The in vivo relevance of the paradoxical bactericidal effect (the Eagle effect) is not evident. We found in vitro a paradoxical bactericidal effect of amoxicillin on 2 strains of nontoxigenic Corynebacterium diphtheriae. Then, using an experimental rabbit model of endocarditis, we evaluated the in vivo relevance of this phenomenon. Rabbits were assigned to the following groups: no treatment (control group), continuous amoxicillin infusion simulating a dosage of 200 mg/kg/day in humans, and continuous amoxicillin infusion simulating a dosage of 20 mg/kg/day in humans. The low dosage (20 mg/kg/day) was significantly more effective than the high dosage (200 mg/kg/day) against both strains (P<.025), confirming the paradoxical bactericidal effect observed in vitro.
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Asseray N, Jacqueline C, Le Mabecque V, Batard E, Bugnon D, Potel G, Caillon J. Activity of glycopeptides against Staphylococcus aureus infection in a rabbit endocarditis model: MICs do not predict in vivo efficacy. Antimicrob Agents Chemother 2005; 49:857-9. [PMID: 15673789 PMCID: PMC547277 DOI: 10.1128/aac.49.2.857-859.2005] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The in vivo efficacy of vancomycin and teicoplanin against five Staphylococcus aureus strains with different susceptibilities to them and methicillin was studied. Rabbits were allocated at random to groups for endocarditis induction with one of these five strains and then treated for 2 days with vancomycin or teicoplanin. Each treated group was compared with a control group infected with the same strain. Vancomycin and teicoplanin showed similar activities. Low MICs did not predict better in vivo results.
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Affiliation(s)
- Nathalie Asseray
- Laboratoire Antibiologie, UPRES EA 3826, Faculté de Médecine, 1 rue Gaston Veil, 44035 Nantes, France
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Jacqueline C, Asseray N, Batard E, Le Mabecque V, Kergueris MF, Dube L, Bugnon D, Potel G, Caillon J. In vivo efficacy of linezolid in combination with gentamicin for the treatment of experimental endocarditis due to methicillin-resistant Staphylococcus aureus. Int J Antimicrob Agents 2004; 24:393-6. [PMID: 15380267 DOI: 10.1016/j.ijantimicag.2004.03.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2004] [Accepted: 03/04/2004] [Indexed: 12/21/2022]
Abstract
Indifference or even antagonism has mainly been reported with combinations including linezolid. The presence of in vitro antagonism is not always correlated with in vivo failure. The purpose of this study was to evaluate the in vivo activity of linezolid combined with gentamicin using a methicillin-resistant Staphylococcus aureus (MRSA) endocarditis experimental model. A human-like pharmacokinetic simulation was used for linezolid and gentamicin to improve the extrapolation of the results to human therapy. Contrary to the antagonism previously described in vitro, linezolid combined with gentamicin exhibited bactericidal activity on the two strains with a decrease of at least 4 log(10)cfu/g of vegetation compared with controls. These data suggest that linezolid plus gentamicin could be an appropriate combination for the treatment of severe MRSA infections.
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Affiliation(s)
- Cedric Jacqueline
- Laboratoire d'Antibiologie (UPRES EA-1156), UER de Médecine, 1 rue Gaston Veil, 44035 Nantes Cedex 01, France
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24
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Caillon J, Boutoille D, Jacqueline C, Bugnon D, Plésiat P, Potel G. CL6-02 Impact in vivo du mécanisme d'efflux sur l'efficacité de l'antibiothérapie dans un modèle d'endocardite expérimentale à P. aeruginosa. Med Mal Infect 2004. [DOI: 10.1016/s0399-077x(04)90061-3] [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: 11/25/2022]
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Gras-Le Guen C, Debillon T, Toquet C, Jarry A, Winer N, Jacqueline C, Kergueris MF, Bingen E, Roze JC, Potel G, Bugnon D. Persistent bacteremia in rabbit fetuses despite maternal antibiotic therapy in a novel intrauterine-infection model. Antimicrob Agents Chemother 2003; 47:2125-30. [PMID: 12821457 PMCID: PMC161868 DOI: 10.1128/aac.47.7.2125-2130.2003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2002] [Revised: 01/22/2003] [Accepted: 04/02/2003] [Indexed: 11/20/2022] Open
Abstract
The effect of optimized maternal therapy by bactericidal agents was evaluated in a reproducible rabbit model of Escherichia coli maternofetal infection simulating human pharmacokinetics. Intravenous antibiotic therapy was begun in the pregnant rabbit 12 h after bacterial intrauterine inoculation, using a computer-controlled pump to simulate human pharmacokinetics of ceftriaxone (1 g/day) associated or not with gentamicin (3 mg/kg of body weight/day). Data were compared for fetal survival, quantitative blood cultures, fetal histology in treated versus untreated groups, and maternal and fetal antibiotic concentrations in plasma in treated animals. Antibiotic therapy led to dramatic improvement in maternal outcome (100% survival versus 100% death in the untreated group in association with maternal septicemia). Fetal survival also improved, with the two-drug combination providing a more potent effect. After 3 days of treatment, 32% of fetuses survived with one-drug therapy and 62% with two-drug therapy (Yates corrected chi(2), P < 0.05). In untreated animals, bacterial counts in blood cultures increased rapidly during the first 24 h up to 8.1 +/- 0.5 log CFU/ml, but remained relatively constant at all times with antibiotic treatment: 4.5 +/- 0.7 log CFU/ml at the start of treatment and 6.2 +/- 0.4 and 5.2 +/- 0.9 log CFU/ml after 72 h for one- and two-drug therapy, respectively (data are means +/- standard deviations). The failure of animals to be cured after 3 days of treatment was not due to an inadequate concentration of ceftriaxone, as the residual level in fetal serum at sacrifice was more than 1000 times the MIC of the microbe. Unexpectedly, inflammation in fetal lung decreased in the treated group after as little as 24 h of antibiotic therapy, despite persistent bacteremia. Although maternal outcome improved and drug concentrations were above the MIC, the treatment did not achieve sterilization of fetuses in utero for this rabbit E. coli maternofetal infection. However, fetal survival showed some improvement, and the histologic features of lung inflammation were reduced.
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Affiliation(s)
- C Gras-Le Guen
- Laboratoire d'Antibiologie Clinique et Expérimentale, Faculté de Médecine de Nantes, Centre Hospitalier Universitaire de Nantes, Nantes, France
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Jacqueline C, Caillon J, Le Mabecque V, Miegeville AF, Donnio PY, Bugnon D, Potel G. In vitro activity of linezolid alone and in combination with gentamicin, vancomycin or rifampicin against methicillin-resistant Staphylococcus aureus by time-kill curve methods. J Antimicrob Chemother 2003; 51:857-64. [PMID: 12654769 DOI: 10.1093/jac/dkg160] [Citation(s) in RCA: 96] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
The in vitro activity of the oxazolidinone linezolid was studied alone and in combination with three antibiotics acting on different cellular targets. Oxazolidinones are bacterial protein synthesis inhibitors that act at a very early stage by preventing the formation of the initiation complex. Combinations of linezolid with gentamicin, vancomycin or rifampicin were evaluated against four methicillin-resistant Staphylococcus aureus strains, using killing curves in conjunction with scanning electron microscopy. Time-kill curves were performed over 24 h using an inoculum of 5 x 10(6)- 1 x 10(7) cfu/mL. Linezolid was studied at concentrations of 1 x, 4 x and 8 x MIC, with partner drugs at 8 x MIC. Addition of linezolid resulted in a decrease of antibacterial activity for gentamicin and vancomycin, and linezolid was antagonistic to the early bactericidal activity of gentamicin. Linezolid, in combination with rifampicin, showed an additive interaction for susceptible strains and inhibited rifampicin-resistant variants. Linezolid plus rifampicin appeared to be the most active combination against methicillin-resistant S. aureus strains in time-kill experiments.
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Affiliation(s)
- Cedric Jacqueline
- Laboratoire d'Antibiologie (UPRES EA-1156), UER de Médecine, 1 rue Gaston Veil, 44035 Nantes Cedex 01, France
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27
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Grandière-Perez L, Jacqueline C, Le Mabecque V, Patey O, Potel G, Bugnon D, Caillon J. [In vivo activity of amoxicillin in a non-toxigenic Corynebacterium diphtheriae rabbit endocarditis experimental model]. Pathol Biol (Paris) 2002; 50:513-5. [PMID: 12490412 DOI: 10.1016/s0369-8114(02)00350-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The mortality of non-toxigenic Corynebacterium diphtheriae endocarditis is high (27%). One explanation could be tolerance to amoxicillin. The aim of this work was to evaluate in vivo the tolerance phenomenon, in a rabbit endocarditis experimental model. Two strains of non-toxigenic Corynebacterium diphtheriae were compared: a tolerant one and a non-tolerant one. EACH ANIMAL WAS RANDOMLY ASSIGNED TO ONE OF THE FOLLOWING GROUPS: no treatment, continuous infusion of amoxicillin simulating 200 mg/kg/24 h in humans, or fractionated infusion of amoxicillin simulating 66 mg/kg/8 h in humans. Surviving bacteria were counted in vegetations after one or three days of treatment. The 24 h fractionated amoxicillin infusion was more efficacious on the non-tolerant strain than on the tolerant strain. On the tolerant strain, 24 h amoxicillin was more efficacious as a continuous infusion than as a fractionated one.
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Affiliation(s)
- L Grandière-Perez
- Laboratoire d'antibiologie, Faculté de Médecine, 1, rue Gaston-Veil, 44035, Nantes, France
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Batard E, Jacqueline C, Boutoille D, Hamel A, Drugeon HB, Asseray N, Leclercq R, Caillon J, Potel G, Bugnon D. Combination of quinupristin-dalfopristin and gentamicin against methicillin-resistant Staphylococcus aureus: experimental rabbit endocarditis study. Antimicrob Agents Chemother 2002; 46:2174-8. [PMID: 12069971 PMCID: PMC127295 DOI: 10.1128/aac.46.7.2174-2178.2002] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The combination of quinupristin-dalfopristin (Q-D) and gentamicin was tested against two strains of gentamicin- and dalfopristin-susceptible methicillin-resistant Staphylococcus aureus (MRSA). One strain was susceptible to macrolides, lincosamides, and streptogramin B type antibiotics (MLS(B)), and the other was constitutively resistant to these antibiotics by virtue of the ermA gene. The checkerboard method and time-kill curves showed that the combination of Q-D and gentamicin was indifferent. A rabbit endocarditis model simulated the pharmacokinetics achieved in humans receiving intravenous injections of Q-D (7.5 mg/kg of body weight three times a day) and gentamicin (3 mg/kg once daily). For the MLS(B)-susceptible strain, a 4-day regimen reduced mean bacterial titers (MBT) in vegetations from 8.5 +/- 0.8 log CFU/g (control group) to 4.1 +/- 2.6 (gentamicin), 3.0 +/- 0.9 (Q-D), and 2.6 +/- 0.5 log CFU/g (Q-D plus gentamicin). For the strain constitutively resistant to MLS(B), a 4-day regimen reduced MBT in vegetations from 8.7 +/- 0.9 log CFU/g (control group) to 5.0 +/- 2.2 (gentamicin), 5.2 +/- 2.2 (Q-D), and 5.1 +/- 2.4 log CFU/g (Q-D plus gentamicin). The differences between control and treatment groups were significant for both strains (P < 0.0001), although there was no significant difference between treatment groups. No resistant variant was isolated from vegetations, and no significant difference in MBT in vegetations of treatment groups after 1-day regimens was observed. This experimental study found no additive benefit in combining Q-D and gentamicin against dalfopristin- and gentamicin-susceptible MRSA.
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Affiliation(s)
- Eric Batard
- Laboratoire d'Antibiologie, Faculté de Médecine, Université de Nantes, Nantes, France
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Asseray N, Caillon J, Roux N, Jacqueline C, Bismuth R, Kergueris MF, Potel G, Bugnon D. Different aminoglycoside-resistant phenotypes in a rabbit Staphylococcus aureus endocarditis infection model. Antimicrob Agents Chemother 2002; 46:1591-3. [PMID: 11959609 PMCID: PMC127149 DOI: 10.1128/aac.46.5.1591-1593.2002] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The impact of different types of enzymatic resistance on the in vivo antibacterial activity of aminoglycosides (amikacin, gentamicin, and netilmicin) was studied in the rabbit endocarditis model with four strains of Staphylococcus aureus. Animals were treated in a manner simulating the administration of a single daily human dose. Amikacin had no effect on the three kanamycin-resistant strains despite apparent susceptibility in the disk diffusion test. Gentamicin appears to be the preferable aminoglycoside for treatment of staphylococcal infections.
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Affiliation(s)
- N Asseray
- Laboratoire d'Antibiologie, UER de Médecine, Nantes, France
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