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Moreau F, Atamanyuk D, Blaukopf M, Barath M, Herczeg M, Xavier NM, Monbrun J, Airiau E, Henryon V, Leroy F, Floquet S, Bonnard D, Szabla R, Brown C, Junop MS, Kosma P, Gerusz V. Potentiating Activity of GmhA Inhibitors on Gram-Negative Bacteria. J Med Chem 2024; 67:6610-6623. [PMID: 38598312 PMCID: PMC11056994 DOI: 10.1021/acs.jmedchem.4c00037] [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] [Received: 01/05/2024] [Revised: 02/28/2024] [Accepted: 03/29/2024] [Indexed: 04/12/2024]
Abstract
Inhibition of the biosynthesis of bacterial heptoses opens novel perspectives for antimicrobial therapies. The enzyme GmhA responsible for the first committed biosynthetic step catalyzes the conversion of sedoheptulose 7-phosphate into d-glycero-d-manno-heptose 7-phosphate and harbors a Zn2+ ion in the active site. A series of phosphoryl- and phosphonyl-substituted derivatives featuring a hydroxamate moiety were designed and prepared from suitably protected ribose or hexose derivatives. High-resolution crystal structures of GmhA complexed to two N-formyl hydroxamate inhibitors confirmed the binding interactions to a central Zn2+ ion coordination site. Some of these compounds were found to be nanomolar inhibitors of GmhA. While devoid of HepG2 cytotoxicity and antibacterial activity of their own, they demonstrated in vitro lipopolysaccharide heptosylation inhibition in Enterobacteriaceae as well as the potentiation of erythromycin and rifampicin in a wild-type Escherichia coli strain. These inhibitors pave the way for a novel treatment of Gram-negative infections.
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Affiliation(s)
- François Moreau
- Mutabilis, 102 Avenue Gaston Roussel, Romainville 93230, France
| | | | - Markus Blaukopf
- Department
of Chemistry, University of Natural Resources
and Life Sciences, Muthgasse
18, Vienna A-1190, Austria
| | - Marek Barath
- Department
of Chemistry, University of Natural Resources
and Life Sciences, Muthgasse
18, Vienna A-1190, Austria
- Institute
of Chemistry, Center for Glycomics, Slovak
Academy of Sciences, Dúbravská cesta 9, Bratislava SK-845 38, Slovakia
| | - Mihály Herczeg
- Department
of Chemistry, University of Natural Resources
and Life Sciences, Muthgasse
18, Vienna A-1190, Austria
- Department
of Pharmaceutical Chemistry, University
of Debrecen, Debrecen 4032, Hungary
| | - Nuno M. Xavier
- Department
of Chemistry, University of Natural Resources
and Life Sciences, Muthgasse
18, Vienna A-1190, Austria
- Centro
de Química Estrutural, Institute of Molecular Sciences, Faculdade de Ciências, Universidade de Lisboa, Ed. C8, 5° Piso, Campo Grande, Lisboa 1749-016, Portugal
| | | | | | | | - Frédéric Leroy
- Carbosynth
Limited, 8&9 Old
Station Business Park, Compton, Berkshire RG20 6NE, U.K.
| | | | - Damien Bonnard
- Mutabilis, 102 Avenue Gaston Roussel, Romainville 93230, France
| | - Robert Szabla
- Department
of Biochemistry, University of Western Ontario, London, ON N6A 3K7, Canada
| | - Chris Brown
- Department
of Biochemistry, University of Western Ontario, London, ON N6A 3K7, Canada
| | - Murray S. Junop
- Department
of Biochemistry, University of Western Ontario, London, ON N6A 3K7, Canada
| | - Paul Kosma
- Department
of Chemistry, University of Natural Resources
and Life Sciences, Muthgasse
18, Vienna A-1190, Austria
| | - Vincent Gerusz
- Mutabilis, 102 Avenue Gaston Roussel, Romainville 93230, France
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Jaffredo M, Duchamp O, Touya N, Bouleau Y, Dulon D, Devillard R, Bonnard D. Proof of concept of intracochlear drug administration by laser-assisted bioprinting in mice. Hear Res 2023; 438:108880. [PMID: 37666034 DOI: 10.1016/j.heares.2023.108880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 07/13/2023] [Accepted: 08/25/2023] [Indexed: 09/06/2023]
Abstract
Transtympanic administration is used clinically for the injection of gentamicin and/or corticosteroids. This atraumatic route is based on passive diffusion through the round window membrane (RWM). The main limitation of this method is related to the clearance through the Eustachian tube, making the concentration of the therapeutic agent at the intracochlear level uncertain and limited. Moreover, this technique remains unsuitable for molecules of high molecular weight or in the case of gene therapies. The purpose was to study a new technique of intracochlear administration in an atraumatic, direct and controlled manner by laser-assisted bioprinting (LAB). LAB was used to deliver dexamethasone phosphate with thermosensitive hydrogel on the mouse RWM. After validation of the regularity and homogeneity of the pattern, the diffusion in vivo of the dexamethasone into the perilymph after LAB has been confirmed by ELISA. Auditory function measurements showed no hearing impairment suggesting that bioprinting does not induce significant cochlear damage. Hence, the present proof of concept study introduces a promising approach for inner ear drug delivery.
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Affiliation(s)
- Manon Jaffredo
- SATT Aquitaine, Aquitaine Science Transfert, Talence, France; INSERM UA06, Univ. Bordeaux, Bordeaux, France
| | | | - Nicolas Touya
- INSERM U1026 BIOTIS, Univ. Bordeaux, Bordeaux, France
| | | | - Didier Dulon
- INSERM UA06, Univ. Bordeaux, Bordeaux, France; Institut de l'Audition, Centre Institut Pasteur/Inserm, Paris, France
| | - Raphael Devillard
- CHU de Bordeaux, Bordeaux, France; INSERM U1026 BIOTIS, Univ. Bordeaux, Bordeaux, France
| | - Damien Bonnard
- CHU de Bordeaux, Bordeaux, France; INSERM UA06, Univ. Bordeaux, Bordeaux, France.
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Bonnard D, Le Rouzic E, Singer MR, Yu Z, Le Strat F, Batisse C, Batisse J, Amadori C, Chasset S, Pye VE, Emiliani S, Ledoussal B, Ruff M, Moreau F, Cherepanov P, Benarous R. Biological and Structural Analyses of New Potent Allosteric Inhibitors of HIV-1 Integrase. Antimicrob Agents Chemother 2023; 67:e0046223. [PMID: 37310224 PMCID: PMC10353390 DOI: 10.1128/aac.00462-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Accepted: 05/08/2023] [Indexed: 06/14/2023] Open
Abstract
HIV-1 integrase-LEDGF allosteric inhibitors (INLAIs) share the binding site on the viral protein with the host factor LEDGF/p75. These small molecules act as molecular glues promoting hyper-multimerization of HIV-1 IN protein to severely perturb maturation of viral particles. Herein, we describe a new series of INLAIs based on a benzene scaffold that display antiviral activity in the single digit nanomolar range. Akin to other compounds of this class, the INLAIs predominantly inhibit the late stages of HIV-1 replication. A series of high-resolution crystal structures revealed how these small molecules engage the catalytic core and the C-terminal domains of HIV-1 IN. No antagonism was observed between our lead INLAI compound BDM-2 and a panel of 16 clinical antiretrovirals. Moreover, we show that compounds retained high antiviral activity against HIV-1 variants resistant to IN strand transfer inhibitors and other classes of antiretroviral drugs. The virologic profile of BDM-2 and the recently completed single ascending dose phase I trial (ClinicalTrials.gov identifier: NCT03634085) warrant further clinical investigation for use in combination with other antiretroviral drugs. Moreover, our results suggest routes for further improvement of this emerging drug class.
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Affiliation(s)
| | | | - Matthew R. Singer
- Chromatin Structure and Mobile DNA Laboratory, Francis Crick Institute, London, United Kingdom
| | - Zhe Yu
- Chromatin Structure and Mobile DNA Laboratory, Francis Crick Institute, London, United Kingdom
| | | | - Claire Batisse
- IGBMC, INSERM, CNRS, Université de Strasbourg, Illkirch, France
| | - Julien Batisse
- IGBMC, INSERM, CNRS, Université de Strasbourg, Illkirch, France
| | - Céline Amadori
- Biodim, Romainville, France
- Université Paris Cité, Institut Cochin, INSERM, CNRS, Paris, France
| | | | - Valerie E. Pye
- Chromatin Structure and Mobile DNA Laboratory, Francis Crick Institute, London, United Kingdom
| | | | | | - Marc Ruff
- IGBMC, INSERM, CNRS, Université de Strasbourg, Illkirch, France
| | | | - Peter Cherepanov
- Chromatin Structure and Mobile DNA Laboratory, Francis Crick Institute, London, United Kingdom
- Department of Infectious Disease, St. Mary's Campus, Imperial College London, London, United Kingdom
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Thai-Van H, Mosnier I, Dejean F, Ambert-Dahan E, Bakhos D, Belmin J, Bonnard D, Borel S, Ceccato JC, Coez A, Damien M, Del Rio M, El Yagoubi M, Genin A, Gros A, Harichaux M, Idriss S, Ionescu E, Joly CA, Salmon PK, Marianowski R, Marx M, Mom T, Parietti-Winkler C, Potier M, Renard C, Roman S, Roy T, Tronche S, Venail F, Vincent C, Reynard P. Early management of presbycusis: recommendations from the French Society of Otorhinolaryngology and Head and Neck Surgery, the French Society of Audiology, and the French Society of Geriatrics and Gerontology. Geriatr Psychol Neuropsychiatr Vieil 2023:1-11. [PMID: 37170803 DOI: 10.1684/pnv.2023.1094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
INTRODUCTION Presbycusis is the physiological decrease in hearing due to advancing age and begins well before the sixth decade. These recommendations recall the principles of early diagnosis of presbycusis and the means of optimal rehabilitation as soon as the first symptoms appear. MATERIAL AND METHODS The recommendations are based on a systematic analysis of the literature carried out by a multidisciplinary group of ENT physicians, audiologists, geriatricians and hearing specialists from all over France. They are classified as grade A, B, C or professional agreement according to a decreasing level of scientific evidence. RESULTS The diagnosis of presbycusis is more difficult at the beginning of its evolution but a certain number of tools are available for its early diagnosis and its face-to-face or remote management. CONCLUSION In the case of a clinical profile suggestive of presbycusis in a young subject, especially if there are several family cases, it is recommended to propose a genetic investigation. Free-field speech audiometry in noise is recommended to measure intelligibility in a realistic environment. Questionnaires in addition to audiometric tests would allow the best assessment of the patient's disability. Hearing rehabilitation with a hearing aid or cochlear implant may slow or prevent cognitive decline. Combined auditory and cognitive rehabilitation should be offered regardless of the time since the hearing was fitting. It is recommended to integrate programs accessible via smartphones, tablets or the Internet, that include different training domains to complement face-to-face sessions.
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Affiliation(s)
- Hung Thai-Van
- Service d'audiologie et d'explorations otoneurologiques, CHU de Lyon, Hôpital Édouard-Herriot, Lyon, France, Claude-Bernard University Lyon 1, Institut de l'audition, Institut Pasteur, Inserm, Paris, France
| | - Isabelle Mosnier
- Institut de l'audition, Institut Pasteur, Inserm, Paris, France, ORL Department, Ile de France reference centre for cochlear and brainstem implants in adults, Pitié-Salpêtrière Hospital Group, Sorbonne University, AP -HP, Paris, France
| | | | - Emmanuelle Ambert-Dahan
- ORL Department, Ile de France reference centre for cochlear and brainstem implants in adults, Pitié-Salpêtrière Hospital Group, Sorbonne University, AP -HP, Paris, France
| | - David Bakhos
- ENT Department, CHU de Tours, iBrain, Inserm U1253, Université François- Rabelais, Tours, France
| | - Joël Belmin
- AP-HP, University Hospitals Pitié- Salpêtrière - Charles-Foix, Department of Geriatrics with a cardiological and neurological orientation, Ivry-sur-Seine, Sorbonne University, Paris, France
| | | | - Stéphanie Borel
- ORL Department, Ile de France reference centre for cochlear and brainstem implants in adults, Pitié-Salpêtrière Hospital Group, Sorbonne University, AP -HP, Paris, France
| | - Jean-Charles Ceccato
- Institute for Neurosciences of Montpellier, Inserm U1298, Centre de recherche et de formation en audioprothèse, University of Montpellier, Montpellier, France
| | - Arnaud Coez
- Institut de l'audition, Institut Pasteur, Inserm, Paris, France
| | - Maxime Damien
- Service d'audiologie et d'explorations otoneurologiques, CHU de Lyon, Hôpital Édouard-Herriot, Lyon, France, Claude-Bernard University Lyon 1, Institut de l'audition, Institut Pasteur, Inserm, Paris, France
| | | | | | | | - Auriane Gros
- ORL Department, Centre mémoire ressources et recherche, CHU de Nice, Institut Claude-Pompidou, Nice, France
| | | | - Samar Idriss
- Service d'audiologie et d'explorations otoneurologiques, CHU de Lyon, Hôpital Édouard-Herriot, Lyon, France
| | - Eugen Ionescu
- Service d'audiologie et d'explorations otoneurologiques, CHU de Lyon, Hôpital Édouard-Herriot, Lyon, France, Institut de l'audition, Institut Pasteur, Inserm, Paris, France
| | - Charles-Alexandre Joly
- Service d'audiologie et d'explorations otoneurologiques, CHU de Lyon, Hôpital Édouard-Herriot, Lyon, France, Institut de l'audition, Institut Pasteur, Inserm, Paris, France
| | | | - Rémi Marianowski
- ORL Department, CHU de Brest, Laboratoire de neurobiologie, UA 4685, Brest, France
| | - Mathieu Marx
- Department of Otology and Otoneurology, Hôpital Pierre-Paul-Riquet, CHU Toulouse Purpan, Toulouse, France
| | - Thierry Mom
- ORL Department, CHU d'Estaing, Clermont-Ferrand, France
| | | | | | - Christian Renard
- Department of Otology and Otoneurology, Salengro Hospital, University of Lille, Lille, France
| | - Stéphane Roman
- ORL Department, Hôpital de la Timone et de la Conception, Marseille, France
| | | | | | - Frédéric Venail
- Otology and Otoneurology unit, ORL Department, CHU Gui-de-Chauliac, Montpellier, France
| | - Christophe Vincent
- Department of Otology and Otoneurology, Salengro Hospital, University of Lille, Lille, France
| | - Pierre Reynard
- Service d'audiologie et d'explorations otoneurologiques, CHU de Lyon, Hôpital Édouard-Herriot, Lyon, France, Claude-Bernard University Lyon 1, Institut de l'audition, Institut Pasteur, Inserm, Paris, France
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5
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Reynard P, Mosnier I, Dejean F, Ambert-Dahan E, Bakhos D, Belmin J, Bonnard D, Borel S, Ceccato JC, Coez A, Damien M, Del Rio M, El Yagoubi M, Genin A, Gros A, Harichaux M, Idriss S, Ionescu E, Joly CA, Krolak-Salmon P, Marianowski R, Marx M, Mom T, Parietti-Winkler C, Potier M, Renard C, Roman S, Roy T, Tronche S, Venail F, Vincent C, Thai-Van H. [Early management of presbycusis: recommendations from the French Society of Otorhinolaryngology and Head and Neck Surgery, the French Society of Audiology, and the French Society of Geriatrics and Gerontology]. Geriatr Psychol Neuropsychiatr Vieil 2023; 21:9-20. [PMID: 37115675 DOI: 10.1684/pnv.2023.1090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
INTRODUCTION Presbycusis is the physiological decrease in hearing due to advancing age and begins well before the sixth decade. These recommendations recall the principles of early diagnosis of presbycusis and the means of optimal rehabilitation as soon as the first symptoms appear. MATERIAL AND METHODS The recommendations are based on a systematic analysis of the literature carried out by a multidisciplinary group of doctors and audioprosthetists from all over France. They are graded A, B, C or expert opinion according to decreasing level of scientific evidence. RESULTS The diagnosis of presbycusis is more difficult at the beginning of its evolution but a certain number of tools are available for its early diagnosis and its management in face-to-face or even distance learning. CONCLUSION In case of a clinical profile suggestive of presbycusis in a young subject, especially if there are several family cases, it is recommended to propose a genetic investigation. It is recommended to perform free-field speech audiometry in noise to measure intelligibility in an environment as close as possible to reality. Questionnaires can be used in addition to audiometry to best assess the patient's disability. It is recommended that hearing rehabilitation with a hearing aid or cochlear implant may slow or prevent cognitive decline. Combined auditory and cognitive rehabilitation should be offered regardless of the time elapsed since the fitting. It is recommended to integrate programs accessible via smartphones, tablets or the Internet, integrating different training domains in addition to face-to-face sessions.
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Affiliation(s)
- Pierre Reynard
- Service d'audiologie et d'explorations otoneurologiques, CHU de Lyon, Hôpital Édouard Herriot, Lyon, France, Université Lyon 1, Institut de l'audition, Institut Pasteur, Inserm, Paris, France
| | - Isabelle Mosnier
- Institut de l'audition, Institut Pasteur, Inserm, Paris, France, APHP-Sorbonne Université, GH Pitié-Salpêtrière, service ORL, unité fonctionnelle implants auditifs, Paris, France
| | | | - Emmanuelle Ambert-Dahan
- APHP-Sorbonne Université, GH Pitié-Salpêtrière, service ORL, unité fonctionnelle implants auditifs, Paris, France
| | - David Bakhos
- Service ORL, CHU de Tours, Inserm UMR 1253 I-Brain, Université François-Rabelais, Tours, France
| | - Joël Belmin
- AP-HP, Hôpitaux universitaires Pitie-Salpêtrière-Charles Foix, Service de Gériatrie à orientation Cardiologique et Neurologique, F-94200 Ivry-sur-Seine, Sorbonne Université, Paris, France
| | - Damien Bonnard
- Service ORL, CHU de Bordeaux, Hôpital Pellegrin, Bordeaux, France
| | - Stéphanie Borel
- APHP-Sorbonne Université, GH Pitié-Salpêtrière, service ORL, unité fonctionnelle implants auditifs, Paris, France
| | - Jean-Charles Ceccato
- Institut des Neurosciences de Montpellier - Inserm U1298, Centre de Recherche et de Formation en Audioprothèse - Montpellier, France
| | - Arnaud Coez
- Institut de l'audition, Institut Pasteur, Inserm, Paris, France
| | - Maxime Damien
- Service d'audiologie et d'explorations otoneurologiques, CHU de Lyon, Hôpital Édouard Herriot, Lyon, France, Université Lyon 1, Institut de l'audition, Institut Pasteur, Inserm, Paris, France
| | | | | | | | - Auriane Gros
- Service ORL, Centre Mémoire Ressources et Recherche. CHU de Nice, Institut Claude Pompidou, Nice, France
| | | | - Samar Idriss
- Service d'audiologie et d'explorations otoneurologiques, CHU de Lyon, Hôpital Édouard Herriot, Lyon, France
| | - Eugen Ionescu
- Service d'audiologie et d'explorations otoneurologiques, CHU de Lyon, Hôpital Édouard Herriot, Lyon, France, Institut de l'audition, Institut Pasteur, Inserm, Paris, France
| | - Charles-Alexandre Joly
- Service d'audiologie et d'explorations otoneurologiques, CHU de Lyon, Hôpital Édouard Herriot, Lyon, France, Institut de l'audition, Institut Pasteur, Inserm, Paris, France
| | | | - Rémi Marianowski
- Service ORL, CHU de Brest, Laboratoire de Neurobiologie UA 4685, France
| | - Mathieu Marx
- Service d'Otologie, Otoneurologie et ORL pédiatrique, Hôpital Pierre-Paul Riquet, CHU Toulouse Purpan, Toulouse, France
| | - Thierry Mom
- Service ORL, CHU d'Estaing, Clermont-Ferrand, France
| | | | | | - Christian Renard
- Service d'Otologie et d'Otoneurologie, Hôpital Salengro, CHU Lille, Université de Lille, Lille, France
| | - Stéphane Roman
- Service ORL, Hôpital de la Timone et de la Conception, Marseille, France
| | - Thomas Roy
- Société Française d'Audiologie, Paris, France
| | - Sophie Tronche
- Société Française d'Otorhinolaryngologie et de Chirurgie de la Face et du Cou, Paris, France
| | - Frédéric Venail
- Unité Otologie et Otoneurologie, Service ORL, CHU Gui de Chauliac, Montpellier, France
| | - Christophe Vincent
- Service d'Otologie et d'Otoneurologie, Hôpital Salengro, CHU Lille, Université de Lille, Lille, France
| | - Hung Thai-Van
- Service d'audiologie et d'explorations otoneurologiques, CHU de Lyon, Hôpital Édouard Herriot, Lyon, France, Université Lyon 1, Institut de l'audition, Institut Pasteur, Inserm, Paris, France
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6
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Joly CA, Reynard P, Mezzi K, Bakhos D, Bergeron F, Bonnard D, Borel S, Bouccara D, Coez A, Dejean F, Del Rio M, Leclercq F, Henrion P, Marx M, Mom T, Mosnier I, Potier M, Renard C, Roy T, Sterkers-Artières F, Venail F, Verheyden P, Veuillet E, Vincent C, Thai-Van H. Guidelines of the French Society of Otorhinolaryngology-Head and Neck Surgery (SFORL) and the French Society of Audiology (SFA) for Speech-in-Noise Testing in Adults. Eur Ann Otorhinolaryngol Head Neck Dis 2022; 139:21-27. [PMID: 34140263 DOI: 10.1016/j.anorl.2021.05.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [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] [Indexed: 11/03/2022]
Abstract
OBJECTIVES This document presents the fundamentals of speech audiometry in noise, general requirements for implementation and criteria for choice among the tests available in French according to the health-professional's needs. MATERIAL AND METHODS The recommendations are based on a systematic analysis of the literature carried out by a multidisciplinary group of doctors, audiologists and audioprosthetists from all over France. They are graded A, B, C or expert opinion according to decreasing level of scientific evidence. RESULTS Eight tests of speech audiometry in noise can be used in France. CONCLUSION To be complete, evaluation of hearing status requires testing understanding of speech in noise. The examination must begin with a minimum of two measurements familiarizing the subject with the test procedure. For initial diagnosis, adaptive procedures establishing the 50% speech reception threshold (SRT50) in noise are to be preferred in order to obtain a rapid and standardized measurement of perception of speech in noise. When the aim is to measure real-life speech comprehension, tests based on sentences, cocktail-party noise and free-field stimulation are to be preferred. Prosthetic gain is evaluated exclusively in free field. This is the only way to evaluate the contribution of binaurality and to measure perception in noise in an environment as close as possible to real life. In order to avoid acoustic interference in free field, at least five loudspeakers should be used, in particular for evaluating the effectiveness of directional microphones, CROS devices enabling sounds picked up in the damaged ear to be rerouted to the functional ear, or bimodal fitting (i.e., when hearing is enabled by two modalities: for example, hearing aid for one ear, cochlear implant for the other).
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Affiliation(s)
- C-A Joly
- Institut de l'Audition - Institut Pasteur, Inserm (French National Institute of Health and Medical Research), 75012 Paris, France; Department of Audiology and Otoneurological Evaluation, Edouard-Herriot Hospital, HCL (Hospices Civils de Lyon), 69003 Lyon, France
| | - P Reynard
- Institut de l'Audition - Institut Pasteur, Inserm (French National Institute of Health and Medical Research), 75012 Paris, France; Department of Audiology and Otoneurological Evaluation, Edouard-Herriot Hospital, HCL (Hospices Civils de Lyon), 69003 Lyon, France; Claude-Bernard University Lyon 1, 69100 Villeurbanne, France
| | - K Mezzi
- Department of Audiology and Otoneurological Evaluation, Edouard-Herriot Hospital, HCL (Hospices Civils de Lyon), 69003 Lyon, France
| | - D Bakhos
- Department of ENT and Head & Neck Surgery, University Hospital of Tours, 37000 Tours, France; iBrain, Inserm U1253, University of Tours, 37000 Tours, France
| | - F Bergeron
- Université Laval, Center for Interdisciplinary Research in Rehabilitation and Social Integration, G1V 0A6 Québec City, QC, Canada
| | - D Bonnard
- Institut de l'Audition - Institut Pasteur, Inserm (French National Institute of Health and Medical Research), 75012 Paris, France; Department of ENT, University Hospital of Bordeaux, 33000 Bordeaux, France
| | - S Borel
- Functional unit for auditory implants and audiovestibular testing, Department of Otorhinolaryngology, Ile de France reference centre for cochlear and brainstem implants in adults, Pitié-Salpêtrière Hospital Group, Sorbonne University, AP-HP, 75013 Paris, France
| | - D Bouccara
- Department of ENT and Head & Neck Oncology, Georges-Pompidou European Hospital, Paris Ouest University Hospitals, AP-HP, 75015 Paris, France
| | - A Coez
- Institut de l'Audition - Institut Pasteur, Inserm (French National Institute of Health and Medical Research), 75012 Paris, France; Laboratoire de correction auditive Eric Bizaguet, 750001 Paris, France
| | - F Dejean
- French Society of Audiology, 75116 Paris, France
| | - M Del Rio
- École d'Audioprothèse - Université de Bordeaux, 33000 Bordeaux, France; Caudéran Audition, 33200 Bordeaux, France
| | - F Leclercq
- Laboratoire d'Audiologie Renard, 59000 Lille, France; Department of Otology and Otoneurology, Salengro Hospital, University of Lille, 59000 Lille, France
| | - P Henrion
- French Society of Audiology, 75116 Paris, France
| | - M Marx
- Department of Otology, Otoneurology, and Paediatric Otorhinolaryngology, Pierre-Paul-Riquet Hospital, Toulouse Purpan University Hospital, 31000 Toulouse, France; Brain and Cognition Laboratory, UMR 5549, Toulouse III University, 31000 Toulouse, France
| | - T Mom
- Department of Otorhinolaryngology and Head & Neck Surgery, Gabriel-Montpied University Hospital, 63000 Clermont-Ferrand, France; Inserm UMR 1107, Sensorineural Biophysics Laboratory, Clermont-Auvergne University, 63000 Clermont-Ferrand, France
| | - I Mosnier
- Functional unit for auditory implants and audiovestibular testing, Department of Otorhinolaryngology, Ile de France reference centre for cochlear and brainstem implants in adults, Pitié-Salpêtrière Hospital Group, Sorbonne University, AP-HP, 75013 Paris, France
| | - M Potier
- Laboratoire d'Audiologie Clinique, 11100 Narbonne, France
| | - C Renard
- Laboratoire d'Audiologie Renard, 59000 Lille, France; Department of Otology and Otoneurology, Salengro Hospital, University of Lille, 59000 Lille, France
| | - T Roy
- Laboratoires F. Le Her, 76000 Rouen, France; Department of ENT and Head & Neck Surgery, Charles Nicolle University Hospital, 76000 Rouen, France
| | - F Sterkers-Artières
- Department of Audiophonology, Hôpital Institut Saint Pierre, 34250 Palavas Les Flots, France
| | - F Venail
- Department of ENT & Maxillofacial Surgery, Gui-de-Chauliac University Hospital, 34000 Montpellier, France; Inserm U1051, Institute for Neurosciences of Montpellier, University of Montpellier, 34000 Montpellier, France
| | - P Verheyden
- Department of Audiology, Haute Ecole Léonard de Vinci, Institut libre Marie Haps, Bruxelles, Belgium
| | - E Veuillet
- Institut de l'Audition - Institut Pasteur, Inserm (French National Institute of Health and Medical Research), 75012 Paris, France; Department of Audiology and Otoneurological Evaluation, Edouard-Herriot Hospital, HCL (Hospices Civils de Lyon), 69003 Lyon, France; Claude-Bernard University Lyon 1, 69100 Villeurbanne, France
| | - C Vincent
- Department of Otology and Otoneurology, Salengro Hospital, University of Lille, 59000 Lille, France
| | - H Thai-Van
- Institut de l'Audition - Institut Pasteur, Inserm (French National Institute of Health and Medical Research), 75012 Paris, France; Department of Audiology and Otoneurological Evaluation, Edouard-Herriot Hospital, HCL (Hospices Civils de Lyon), 69003 Lyon, France; Claude-Bernard University Lyon 1, 69100 Villeurbanne, France; French Society of Audiology, 75116 Paris, France.
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Duchêne J, Billiet L, Franco V, Bonnard D. Validation of the French version of HHIE-S (Hearing Handicap Inventory for the Elderly - Screening) questionnaire in French over-60 year-olds. Eur Ann Otorhinolaryngol Head Neck Dis 2021; 139:198-201. [PMID: 34895850 DOI: 10.1016/j.anorl.2021.11.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
INTRODUCTION The HHIE-S (Hearing Handicap Inventory for the Elderly - Screening) is widely used for hearing-loss disorder in the elderly. The main objective of the present study was to validate a French version. The secondary objective was to determinate a cut-off score as indication for hearing rehabilitation. METHODS We translated the HHIE-S into French, respecting the cross-cultural adaptation process for medical questionnaires. An observational study assessed the translation (10 questions, scored from 0 to 40) used for screening purposes in a prospective cohort, aged ≥60 years, with comparison to pure tone, speech-in-silence and speech-in-noise audiometry. Subjects were considered hearing-impaired if the pure-tone average at 500, 1,000, 2,000 and 4,000 Hz was >20 dB HL in one or both ears. RESULTS We tested 294 subjects (mean age =67±6 years). Hearing loss prevalence was 34.7 %. Cronbach's alpha (test reliability) was high (0.84). Taking HHIE-S score >8/40 as cut-off defining hearing loss, sensitivity was 80.4%, specificity 85.4 %, positive predictive value 74.5 % and negative predictive value 89.1 %. Seventy-three subjects (24.8 %) had theoretic indications for hearing aids, optimally detected by HHIE-S score >16/40 (88,4 %). CONCLUSION Our study validated the French version of the HHIE-S. This tool could be useful in screening for age-induced hearing loss in the elderly French population.
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Affiliation(s)
- J Duchêne
- Service d'Otorhinolaryngologie, de Chirurgie Cervico-Faciale et d'ORL Pédiatrique, Centre Hospitalier Universitaire Pellegrin, Bordeaux - Université de Bordeaux, place Amélie Raba-Léon, 33076 Bordeaux, France.
| | - L Billiet
- Unité d'Informatique et Archivistique Médicale, Service d'Information Médicale, Pôle de Santé Publique, Centre Hospitalier Universitaire Pellegrin, Bordeaux - Université de Bordeaux, place Amélie Raba-Léon, 33076 Bordeaux, France
| | - V Franco
- Service d'Otorhinolaryngologie, de Chirurgie Cervico-Faciale et d'ORL Pédiatrique, Centre Hospitalier Universitaire Pellegrin, Bordeaux - Université de Bordeaux, place Amélie Raba-Léon, 33076 Bordeaux, France
| | - D Bonnard
- Service d'Otorhinolaryngologie, de Chirurgie Cervico-Faciale et d'ORL Pédiatrique, Centre Hospitalier Universitaire Pellegrin, Bordeaux - Université de Bordeaux, place Amélie Raba-Léon, 33076 Bordeaux, France
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8
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Molher J, Duchene L, Bukhardt N, Bonnard D, Sagardoy T. Quality and readability of French on-line information about otitis media with effusion. Eur Ann Otorhinolaryngol Head Neck Dis 2021; 138:437-442. [PMID: 33714684 DOI: 10.1016/j.anorl.2021.03.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 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] [Indexed: 11/26/2022]
Abstract
INTRODUCTION Childhood otitis media with effusion (OME) is a frequent disease often misunderstood by parents. Information on the Internet is of variable quality and readability. The aim of this study was to measure the quality and readability of French websites related to OME. MATERIAL AND METHODS An advanced Google search was conducted using the terms "Otite séro-muqueuse OR Otite séreuse". Quality was assessed on DISCERN criteria. Readability was assessed using Flesch Reading Ease Scoring (FRES), Flesch-Kincaid Grade Level (FKGL), the Simple Measure of Gobbledygook (SMOG) and a Fry graph. Medians and standard deviations were calculated. Correlation between quality and readability was assessed on Spearman r coefficient. RESULTS The first ten websites meeting inclusion and exclusion criteria were evaluated. One had been updated during the last 12 months. Median DISCERN score was 49±13.7/80. Median FRES score was 46±9.5/100. Median USA grade-level estimated by FKGL and SMOG respectively was 11±1.7 and 12±1.5. Six websites had Fry score>12. One website showed high quality. One had a readability score in the target range (below 9th grade reading level (age 14-15)) according to FRES and FKGL. A suggestive correlation was found between lower SMOG readability and higher quality: r=0.72 (P=0.024). Three websites followed the most recent scientific guidelines. CONCLUSION Online information about OME was of variable quality and readability. Good quality information tended to be less easily understandable by parents.
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Affiliation(s)
- J Molher
- Service d'oto-rhino-laryngologie, de chirurgie cervico-faciale et d'ORL pédiatrique, centre hospitalier universitaire (CHU) de Bordeaux, 33076 Bordeaux cedex, France.
| | - L Duchene
- Service d'oto-rhino-laryngologie, de chirurgie cervico-faciale et d'ORL pédiatrique, centre hospitalier universitaire (CHU) de Bordeaux, 33076 Bordeaux cedex, France
| | - N Bukhardt
- Service d'oto-rhino-laryngologie, de chirurgie cervico-faciale et d'ORL pédiatrique, centre hospitalier universitaire (CHU) de Bordeaux, 33076 Bordeaux cedex, France
| | - D Bonnard
- Service d'oto-rhino-laryngologie, de chirurgie cervico-faciale et d'ORL pédiatrique, centre hospitalier universitaire (CHU) de Bordeaux, 33076 Bordeaux cedex, France
| | - T Sagardoy
- Service d'oto-rhino-laryngologie, de chirurgie cervico-faciale et d'ORL pédiatrique, centre hospitalier universitaire (CHU) de Bordeaux, 33076 Bordeaux cedex, France
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9
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Duchêne J, Ribadeau Dumas A, Bonnard D, Sagardoy T, Franco-Vidal V. Musical Ear Syndrome: Prevalence and characteristics in cochlear implant bearers. Eur Ann Otorhinolaryngol Head Neck Dis 2020; 138:153-157. [PMID: 33257264 DOI: 10.1016/j.anorl.2020.11.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 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] [Indexed: 10/22/2022]
Abstract
INTRODUCTION Musical Ear Syndrome (MES) is an uncommon phenomenon described as the perception of auditory musical sensations not corresponding to any external stimulus. It seems to be more frequent in case of profound hearing loss. Our objective was to evaluate prevalence, characteristics and risk factors in a population of cochlear implant patients. METHODS A retrospective study was conducted in cochlear implant patients, who were adult (>18 years) in 2020 and underwent cochlear implantation between 1993 and 2019. We analyzed the presence and characteristics of MES. RESULTS 118 of the 358 patients (33%) perceived or had perceived auditory musical sensations: 71 (19.8%) before, 100 (28%) after, and 53 (14.8%) both before and after implantation. The musical auditory sensations were usually short and well-tolerated, resembling instrumental music, and occurring several times a day. Thirteen patients (11%) considered them intolerable. Fatigue was a triggering factor in 40 patients (33.9%). Personal and medical characteristics, type of implantation, make of implant, etiology and tinnitus did not emerge as risk factors. On the other hand, MES+ patients were significatively younger (56±17.4 years versus 61.9±17.9 years; P=0.0009). Despite the phenomenon, patients were satisfied with implant functioning and subjective auditory performance was not affected. CONCLUSION Prevalence of Musical Ear Syndrome was high in cochlear implant patients, and especially in younger subjects. It is essential to improve knowledge of this phenomenon.
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Affiliation(s)
- J Duchêne
- Département d'Otorhinolaryngologie, de Chirurgie Cervico-Faciale et d'ORL Pédiatrique, Centre Hospitalier Universitaire Pellegrin, Place Amélie Raba-Léon, 33076 Bordeaux, France.
| | - A Ribadeau Dumas
- Département d'Otorhinolaryngologie, de Chirurgie Cervico-Faciale et d'ORL Pédiatrique, Centre Hospitalier Universitaire Pellegrin, Place Amélie Raba-Léon, 33076 Bordeaux, France
| | - D Bonnard
- Département d'Otorhinolaryngologie, de Chirurgie Cervico-Faciale et d'ORL Pédiatrique, Centre Hospitalier Universitaire Pellegrin, Place Amélie Raba-Léon, 33076 Bordeaux, France
| | - T Sagardoy
- Département d'Otorhinolaryngologie, de Chirurgie Cervico-Faciale et d'ORL Pédiatrique, Centre Hospitalier Universitaire Pellegrin, Place Amélie Raba-Léon, 33076 Bordeaux, France
| | - V Franco-Vidal
- Département d'Otorhinolaryngologie, de Chirurgie Cervico-Faciale et d'ORL Pédiatrique, Centre Hospitalier Universitaire Pellegrin, Place Amélie Raba-Léon, 33076 Bordeaux, France
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10
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Aussedat C, Robier M, Aoustin JM, Parietti-Winkler C, Lescanne E, Bonnard D, Marx M, Teissier N, Van Den Abbeele T, François M, Galvin J, Bakhos D. Using virtual reality in audiological training: Our experience in 22 otolaryngology residents. Clin Otolaryngol 2020; 45:643-648. [PMID: 32306528 DOI: 10.1111/coa.13554] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 04/07/2020] [Accepted: 04/13/2020] [Indexed: 02/05/2023]
Affiliation(s)
- Charles Aussedat
- Service ORL et Chirurgie Cervico-Faciale, CHU de Tours, Tours, France.,Faculté de Médecine de Tours, CHRU de Tours, Université François-Rabelais de Tours, Tours, France
| | - Mathieu Robier
- Service ORL et Chirurgie Cervico-Faciale, CHU de Tours, Tours, France
| | | | | | - Emmanuel Lescanne
- Service ORL et Chirurgie Cervico-Faciale, CHU de Tours, Tours, France.,Faculté de Médecine de Tours, CHRU de Tours, Université François-Rabelais de Tours, Tours, France
| | - Damien Bonnard
- Department of Otorhinolaryngology and Skull Base Surgery, Pellegrin University Hospital, University of Bordeaux, Bordeaux, France
| | - Mathieu Marx
- Service d'Oto-Rhino-Laryngologie, d'Oto-Neurologie et d'ORL Pédiatrique, Centre Hospitalier Universitaire de Toulouse, Toulouse Cedex 9, France
| | - Natacha Teissier
- Department of Pediatric Otorhinolaryngology, Head & Neck Surgery, Robert Debré University Hospital APHP, Paris 7 University, Sorbonne Cité, Paris, France
| | - Thierry Van Den Abbeele
- Department of Pediatric Otorhinolaryngology, Head & Neck Surgery, Robert Debré University Hospital APHP, Paris 7 University, Sorbonne Cité, Paris, France
| | - Martine François
- Department of Pediatric Otorhinolaryngology, Head & Neck Surgery, Robert Debré University Hospital APHP, Paris 7 University, Sorbonne Cité, Paris, France
| | | | - David Bakhos
- Service ORL et Chirurgie Cervico-Faciale, CHU de Tours, Tours, France.,Faculté de Médecine de Tours, CHRU de Tours, Université François-Rabelais de Tours, Tours, France.,INSERM UMR 1253 I-brain, CHRU de Tours, Université François-Rabelais de Tours, Tours, France
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11
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Dumas AR, Schwalje AT, Franco-Vidal V, Bébéar JP, Darrouzet V, Bonnard D. Cochlear implantation in far-advanced otosclerosis: hearing results and complications. ACTA ACUST UNITED AC 2019; 38:445-452. [PMID: 30498273 PMCID: PMC6265674 DOI: 10.14639/0392-100x-1442] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [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: 09/29/2016] [Accepted: 08/22/2017] [Indexed: 11/23/2022]
Abstract
Severe forms of otosclerosis known as far-advanced otosclerosis (FAO) can lead to severe to profound sensorineural hearing loss and can justify cochlear implantation. Because of the pathophysiology of otosclerosis, patients implanted for FAO may experience an increased rate of complications, such as facial nerve stimulation or electrode dislocation, and may have poorer hearing outcomes than expected. This retrospective study aimed to compare cochlear implantation hearing outcomes, surgical difficulties and complications in FAO patients versus non-FAO patients. Moreover, we evaluated whether high resolution computed tomography (CT scan) findings were predictive of perioperative problems, complications and hearing outcomes. FAO patients were diagnosed based on medical history, examination and CT scan. Thirty-five ears from FAO patients were compared to 38 control ears. Audiometric results were assessed at least 12 months after implantation by pure tone average, speech reception threshold, monosyllabic and disyllabic word recognition score (WRS) and Central Institute for the Deaf (CID) sentences test. Complications and surgical difficulties were compiled. CT scan findings were categorised within 3 grades of otosclerotic extension. No significant difference was found between FAO and non-FAO hearing outcomes, except that monosyllabic WRS were lower for FAO patients, especially those who underwent previous stapedotomy. Facial nerve symptomatology occurred in 8.6% of FAO patients; among these, one required explantation-reimplantation surgery. 86% of FAO implanted patients had retrofenestral extension on CT. These were associated with poorer disyllabic WRS (51% vs 68%, p < 0.05) than those with only fenestral involvement. Although not significant, high grade of severity on CT tended to be associated with surgical difficulties and complications. Cochlear implantation in FAO patients is an effective treatment technique. Though the overall complication rate is low, it tends to be higher in cases of severe extension on CT. Patient counselling should be adjusted accordingly.
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Affiliation(s)
- A Ribadeau Dumas
- Department of Otorhinolaryngology and Skull Base Surgery, Pellegrin University Hospital F-33000, University of Bordeaux, France
| | - A T Schwalje
- Department of Otolaryngology, Head and Neck Surgery, University of Iowa Hospitals and Clinics, Iowa City, USA
| | - V Franco-Vidal
- Department of Otorhinolaryngology and Skull Base Surgery, Pellegrin University Hospital F-33000, University of Bordeaux, France
| | - J P Bébéar
- Department of Otorhinolaryngology and Skull Base Surgery, Pellegrin University Hospital F-33000, University of Bordeaux, France
| | - V Darrouzet
- Department of Otorhinolaryngology and Skull Base Surgery, Pellegrin University Hospital F-33000, University of Bordeaux, France
| | - D Bonnard
- Department of Otorhinolaryngology and Skull Base Surgery, Pellegrin University Hospital F-33000, University of Bordeaux, France
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12
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Levy N, Bruneau JM, Le Rouzic E, Bonnard D, Le Strat F, Caravano A, Chevreuil F, Barbion J, Chasset S, Ledoussal B, Moreau F, Ruff M. Structural Basis for E. coli Penicillin Binding Protein (PBP) 2 Inhibition, a Platform for Drug Design. J Med Chem 2019; 62:4742-4754. [PMID: 30995398 DOI: 10.1021/acs.jmedchem.9b00338] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [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]
Abstract
Penicillin-binding proteins (PBPs) are the targets of the β-lactams, the most successful class of antibiotics ever developed against bacterial infections. Unfortunately, the worldwide and rapid spread of large spectrum β-lactam resistance genes such as carbapenemases is detrimental to the use of antibiotics in this class. New potent PBP inhibitors are needed, especially compounds that resist β-lactamase hydrolysis. Here we describe the structure of the E. coli PBP2 in its Apo form and upon its reaction with 2 diazabicyclo derivatives, avibactam and CPD4, a new potent PBP2 inhibitor. Examination of these structures shows that unlike avibactam, CPD4 can perform a hydrophobic stacking on Trp370 in the active site of E. coli PBP2. This result, together with sequence analysis, homology modeling, and SAR, allows us to propose CPD4 as potential starting scaffold to develop molecules active against a broad range of bacterial species at the top of the WHO priority list.
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Affiliation(s)
- Nicolas Levy
- Mutabilis , 102 Avenue Gaston Roussel , 93230 Romainville , France.,IGBMC , 1 Rue Laurent Fries , 67404 Illkirch , France
| | | | - Erwann Le Rouzic
- Mutabilis , 102 Avenue Gaston Roussel , 93230 Romainville , France
| | - Damien Bonnard
- Mutabilis , 102 Avenue Gaston Roussel , 93230 Romainville , France
| | | | - Audrey Caravano
- Mutabilis , 102 Avenue Gaston Roussel , 93230 Romainville , France
| | | | - Julien Barbion
- Mutabilis , 102 Avenue Gaston Roussel , 93230 Romainville , France
| | - Sophie Chasset
- Mutabilis , 102 Avenue Gaston Roussel , 93230 Romainville , France
| | - Benoît Ledoussal
- Mutabilis , 102 Avenue Gaston Roussel , 93230 Romainville , France
| | - François Moreau
- Mutabilis , 102 Avenue Gaston Roussel , 93230 Romainville , France
| | - Marc Ruff
- IGBMC , 1 Rue Laurent Fries , 67404 Illkirch , France
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13
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Mosnier I, Vanier A, Bonnard D, Lina-Granade G, Truy E, Bordure P, Godey B, Marx M, Lescanne E, Venail F, Poncet C, Sterkers O, Belmin J. Long-Term Cognitive Prognosis of Profoundly Deaf Older Adults After Hearing Rehabilitation Using Cochlear Implants. J Am Geriatr Soc 2018; 66:1553-1561. [DOI: 10.1111/jgs.15445] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2017] [Revised: 04/10/2018] [Accepted: 04/17/2018] [Indexed: 11/28/2022]
Affiliation(s)
- Isabelle Mosnier
- Unité Réhabilitation Chirurgicale Mini-Invasive et Robotisée de l'Audition, INSERM; Sorbonne Université; Paris France
- Service ORL, Otologie, Implants Auditifs et Chirurgie de la Base du Crâne, AP-HP; GHU Pitié-Salpêtrière; Paris France
| | - Antoine Vanier
- Département de Santé Publique; Sorbonne Université; Paris France
- Département de Biostatistique, Santé Publique et Informatique Médicale, AP-HP; GHU Pitié-Salpêtrière; Paris France
| | - Damien Bonnard
- Lyon Neuroscience Research Center, Brain Dynamics and Cognition Team; CRNL, INSERM U1028, CNRS UMR5292; Lyon F-69000 France
| | - Geneviève Lina-Granade
- Lyon Neuroscience Research Center, Brain Dynamics and Cognition Team; CRNL, INSERM U1028, CNRS UMR5292; Lyon F-69000 France
| | - Eric Truy
- Service ORL; Hôpital Pellegrin; Bordeaux France
- Service ORL; Hôpital Edouard Herriot; Lyon France
| | | | - Benoit Godey
- Service ORL; Hôpital Pontchailloux; Rennes France
| | | | | | | | | | - Olivier Sterkers
- Unité Réhabilitation Chirurgicale Mini-Invasive et Robotisée de l'Audition, INSERM; Sorbonne Université; Paris France
- Service ORL, Otologie, Implants Auditifs et Chirurgie de la Base du Crâne, AP-HP; GHU Pitié-Salpêtrière; Paris France
| | - Joël Belmin
- Service de Gériatrie et Sorbonne Université AP-HP; Hôpital Charles Foix; Ivry-sur-Seine France
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14
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Bonnard D, Schwalje A, Gantz B, Choi I. Electric and acoustic harmonic integration predicts speech-in-noise performance in hybrid cochlear implant users. Hear Res 2018; 367:223-230. [PMID: 29980380 DOI: 10.1016/j.heares.2018.06.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Revised: 06/14/2018] [Accepted: 06/25/2018] [Indexed: 11/15/2022]
Abstract
BACKGROUND Pitch perception of complex tones relies on place or temporal fine structure-based mechanisms from resolved harmonics and the temporal envelope of unresolved harmonics. Combining this information is essential for speech-in-noise performance, as it allows segregation of a target speaker from background noise. In hybrid cochlear implant (H-CI) users, low frequency acoustic hearing should provide pitch from resolved harmonics while high frequency electric hearing should provide temporal envelope pitch from unresolved harmonics. How the acoustic and electric auditory inputs interact for H-CI users is largely unknown. Harmonicity and inharmonicity are emergent features of sound in which overtones are concordant or discordant with the fundamental frequency. We hypothesized that some H-CI users would be able to integrate acoustic and electric information for complex tone pitch perception, and that this ability would be correlated with speech-in-noise performance. In this study, we used perception of inharmonicity to demonstrate this integration. METHODS Fifteen H-CI users with only acoustic hearing below 500 Hz, only electric hearing above 2 kHz, and more than 6 months CI experience, along with eighteen normal hearing (NH) controls, were presented with harmonic and inharmonic sounds. The stimulus was created with a low frequency component, corresponding with the H-CI user's acoustic hearing (fundamental frequency between 125 and 174 Hz), and a high frequency component, corresponding with electric hearing. Subjects were asked to identify the more inharmonic sound, which requires the perceptual integration of the low and high components. Speech-in-noise performance was tested in both groups using the California Consonant Test (CCT), and perception of Consonant-Nucleus-Consonant (CNC) words in quiet and AzBio sentences in noise were tested for the H-CI users. RESULTS Eight of the H-CI subjects (53%), and all of the NH subjects, scored significantly above chance level for at least one subset of the inharmonicity detection task. Inharmonicity detection ability, but not age or pure tone average, predicted speech scores in a linear model. These results were significantly correlated with speech scores in both quiet and noise for H-CI users, but not with speech in noise performance for NH listeners. Musical experience predicted inharmonicity detection ability, but did not predict speech performance. CONCLUSIONS We demonstrate integration of acoustic and electric information in H-CI users for complex pitch sensation. The correlation with speech scores in H-CI users might be associated with the ability to segregate a target speaker from background noise using the speaker's fundamental frequency.
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Affiliation(s)
- Damien Bonnard
- Department of Otolaryngology - Head and Neck Surgery, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
| | - Adam Schwalje
- Department of Otolaryngology - Head and Neck Surgery, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
| | - Bruce Gantz
- Department of Otolaryngology - Head and Neck Surgery, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
| | - Inyong Choi
- Department of Otolaryngology - Head and Neck Surgery, University of Iowa Hospitals and Clinics, Iowa City, IA, USA; Department of Communication Sciences and Disorders, University of Iowa, Iowa City, IA, USA.
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15
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Bonnard D, Le Rouzic E, Eiler S, Amadori C, Orlov I, Bruneau JM, Brias J, Barbion J, Chevreuil F, Spehner D, Chasset S, Ledoussal B, Moreau F, Saïb A, Klaholz BP, Emiliani S, Ruff M, Zamborlini A, Benarous R. Structure-function analyses unravel distinct effects of allosteric inhibitors of HIV-1 integrase on viral maturation and integration. J Biol Chem 2018; 293:6172-6186. [PMID: 29507092 DOI: 10.1074/jbc.m117.816793] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [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: 09/12/2017] [Revised: 02/13/2018] [Indexed: 11/06/2022] Open
Abstract
Recently, a new class of HIV-1 integrase (IN) inhibitors with a dual mode of action, called IN-LEDGF/p75 allosteric inhibitors (INLAIs), was described. Designed to interfere with the IN-LEDGF/p75 interaction during viral integration, unexpectedly, their major impact was on virus maturation. This activity has been linked to induction of aberrant IN multimerization, whereas inhibition of the IN-LEDGF/p75 interaction accounts for weaker antiretroviral effect at integration. Because these dual activities result from INLAI binding to IN at a single binding site, we expected that these activities co-evolved together, driven by the affinity for IN. Using an original INLAI, MUT-A, and its activity on an Ala-125 (A125) IN variant, we found that these two activities on A125-IN can be fully dissociated: MUT-A-induced IN multimerization and the formation of eccentric condensates in viral particles, which are responsible for inhibition of virus maturation, were lost, whereas inhibition of the IN-LEDGF/p75 interaction and consequently integration was fully retained. Hence, the mere binding of INLAI to A125 IN is insufficient to promote the conformational changes of IN required for aberrant multimerization. By analyzing the X-ray structures of MUT-A bound to the IN catalytic core domain (CCD) with or without the Ala-125 polymorphism, we discovered that the loss of IN multimerization is due to stabilization of the A125-IN variant CCD dimer, highlighting the importance of the CCD dimerization energy for IN multimerization. Our study reveals that affinity for the LEDGF/p75-binding pocket is not sufficient to induce INLAI-dependent IN multimerization and the associated inhibition of viral maturation.
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Affiliation(s)
- Damien Bonnard
- From Biodim Mutabilis, 93230 Romainville, .,Inserm U944, CNRS UMR 7212, Université Paris Diderot, Conservatoire National des Arts et Métiers, 75010 Paris
| | | | - Sylvia Eiler
- the Centre for Integrative Biology, IGBMC, Inserm, CNRS, Université de Strasbourg, 67404 Illkirch, and
| | - Céline Amadori
- From Biodim Mutabilis, 93230 Romainville.,the Institut Cochin, Inserm U1016, 75014 Paris, France
| | - Igor Orlov
- the Centre for Integrative Biology, IGBMC, Inserm, CNRS, Université de Strasbourg, 67404 Illkirch, and
| | | | | | | | | | - Danièle Spehner
- the Centre for Integrative Biology, IGBMC, Inserm, CNRS, Université de Strasbourg, 67404 Illkirch, and
| | | | | | | | - Ali Saïb
- Inserm U944, CNRS UMR 7212, Université Paris Diderot, Conservatoire National des Arts et Métiers, 75010 Paris
| | - Bruno P Klaholz
- the Centre for Integrative Biology, IGBMC, Inserm, CNRS, Université de Strasbourg, 67404 Illkirch, and
| | | | - Marc Ruff
- the Centre for Integrative Biology, IGBMC, Inserm, CNRS, Université de Strasbourg, 67404 Illkirch, and
| | - Alessia Zamborlini
- Inserm U944, CNRS UMR 7212, Université Paris Diderot, Conservatoire National des Arts et Métiers, 75010 Paris,
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Amadori C, van der Velden YU, Bonnard D, Orlov I, van Bel N, Le Rouzic E, Miralles L, Brias J, Chevreuil F, Spehner D, Chasset S, Ledoussal B, Mayr L, Moreau F, García F, Gatell J, Zamborlini A, Emiliani S, Ruff M, Klaholz BP, Moog C, Berkhout B, Plana M, Benarous R. The HIV-1 integrase-LEDGF allosteric inhibitor MUT-A: resistance profile, impairment of virus maturation and infectivity but without influence on RNA packaging or virus immunoreactivity. Retrovirology 2017; 14:50. [PMID: 29121950 PMCID: PMC5680779 DOI: 10.1186/s12977-017-0373-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [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: 07/17/2017] [Accepted: 10/27/2017] [Indexed: 01/22/2023] Open
Abstract
Background
HIV-1 Integrase (IN) interacts with the cellular co-factor LEDGF/p75 and tethers the HIV preintegration complex to the host genome enabling integration. Recently a new class of IN inhibitors was described, the IN-LEDGF allosteric inhibitors (INLAIs). Designed to interfere with the IN-LEDGF interaction during integration, the major impact of these inhibitors was surprisingly found on virus maturation, causing a reverse transcription defect in target cells. Results
Here we describe the MUT-A compound as a genuine INLAI with an original chemical structure based on a new type of scaffold, a thiophene ring. MUT-A has all characteristics of INLAI compounds such as inhibition of IN-LEDGF/p75 interaction, IN multimerization, dual antiretroviral (ARV) activities, normal packaging of genomic viral RNA and complete Gag protein maturation. MUT-A has more potent ARV activity compared to other INLAIs previously reported, but similar profile of resistance mutations and absence of ARV activity on SIV. HIV-1 virions produced in the presence of MUT-A were non-infectious with the formation of eccentric condensates outside of the core. In studying the immunoreactivity of these non-infectious virions, we found that inactivated HIV-1 particles were captured by anti-HIV-specific neutralizing and non-neutralizing antibodies (b12, 2G12, PGT121, 4D4, 10-1074, 10E8, VRC01) with efficiencies comparable to non-treated virus. Autologous CD4+ T lymphocyte proliferation and cytokine induction by monocyte-derived dendritic cells (MDDC) pulsed either with MUT-A-inactivated HIV or non-treated HIV were also comparable. Conclusions
Although strongly defective in infectivity, HIV-1 virions produced in the presence of the MUT-A INLAI have a normal protein and genomic RNA content as well as B and T cell immunoreactivities comparable to non-treated HIV-1. These inactivated viruses might form an attractive new approach in vaccine research in an attempt to study if this new type of immunogen could elicit an immune response against HIV-1 in animal models. Electronic supplementary material The online version of this article (10.1186/s12977-017-0373-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Céline Amadori
- Biodim Mutabilis, 93230, Romainville, France.,INSERM, U1016, Institut Cochin, Paris, France.,CNRS, UMR8104, Paris, France.,University Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Yme Ubeles van der Velden
- Laboratory of Experimental Virology, Department of Medical Microbiology, Center for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | | | - Igor Orlov
- Centre for Integrative Biology, IGBMC, CNRS, INSERM, University of Strasbourg, Strasbourg, France
| | - Nikki van Bel
- Laboratory of Experimental Virology, Department of Medical Microbiology, Center for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | | | - Laia Miralles
- AIDS Research Group, IDIBAPS, Hospital Clinic, Barcelona, Spain
| | - Julie Brias
- Biodim Mutabilis, 93230, Romainville, France
| | | | - Daniele Spehner
- Centre for Integrative Biology, IGBMC, CNRS, INSERM, University of Strasbourg, Strasbourg, France
| | | | | | | | | | - Felipe García
- AIDS Research Group, IDIBAPS, Hospital Clinic, Barcelona, Spain
| | - José Gatell
- AIDS Research Group, IDIBAPS, Hospital Clinic, Barcelona, Spain
| | - Alessia Zamborlini
- CNRS, UMR7212, INSERM U944, Université Paris Diderot, Conservatoire National des Arts et Métiers, Paris, France
| | - Stéphane Emiliani
- INSERM, U1016, Institut Cochin, Paris, France.,CNRS, UMR8104, Paris, France.,University Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Marc Ruff
- Centre for Integrative Biology, IGBMC, CNRS, INSERM, University of Strasbourg, Strasbourg, France
| | - Bruno P Klaholz
- Centre for Integrative Biology, IGBMC, CNRS, INSERM, University of Strasbourg, Strasbourg, France
| | | | - Ben Berkhout
- Laboratory of Experimental Virology, Department of Medical Microbiology, Center for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.
| | - Montserrat Plana
- AIDS Research Group, IDIBAPS, Hospital Clinic, Barcelona, Spain.
| | - Richard Benarous
- Biodim Mutabilis, 93230, Romainville, France. .,, 19 rue de Croulebarbe, 75013, Paris, France.
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Bonnard D, de Monès E, Sagardoy T, Franco-Vidal V, Darrouzet V, Fierens S. Transtympanic pseudoaneurysm of the internal carotid artery complicating a myringotomy in a four-year old child: Case report and literature review. Am J Otolaryngol 2017; 38:713-717. [PMID: 28864273 DOI: 10.1016/j.amjoto.2017.08.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 07/19/2017] [Accepted: 08/23/2017] [Indexed: 12/01/2022]
Abstract
We report the first case of a transtympanic iatrogenic internal carotid artery (ICA) pseudoaneurysm diagnosed in a 4-year-old child following a myringotomy. An endovascular treatment with a covered-stent was decided; spontaneous thrombosis was found during the therapeutic arteriography, and the procedure was aborted. Otoscopy and computed tomography (CT) scan monitoring showed a prolonged thrombosis and the disappearance of the pseudoaneurysm 18months after the diagnostic arteriography. Based on literature review, endovascular techniques seem to be preferred to the surgical approach for treatment of intrapetrous ICA pseudoaneurysm, however clinical and CT scan monitoring may also be a valid option.
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Affiliation(s)
- Damien Bonnard
- Department of Otorhinolaryngology - Head and Neck Surgery, University Hospital of Bordeaux, Bordeaux F-33000, France.
| | - Erwan de Monès
- Department of Otorhinolaryngology - Head and Neck Surgery, University Hospital of Bordeaux, Bordeaux F-33000, France
| | - Thomas Sagardoy
- Department of Otorhinolaryngology - Head and Neck Surgery, University Hospital of Bordeaux, Bordeaux F-33000, France
| | - Valérie Franco-Vidal
- Department of Otorhinolaryngology - Head and Neck Surgery, University Hospital of Bordeaux, Bordeaux F-33000, France
| | - Vincent Darrouzet
- Department of Otorhinolaryngology - Head and Neck Surgery, University Hospital of Bordeaux, Bordeaux F-33000, France
| | - Sylvestre Fierens
- Department of Otorhinolaryngology - Head and Neck Surgery, University Hospital of Bordeaux, Bordeaux F-33000, France
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Linder T, Mulazimoglu S, El Hadi T, Darrouzet V, Ayache D, Somers T, Schmerber S, Vincent C, Mondain M, Lescanne E, Bonnard D. Iatrogenic facial nerve injuries during chronic otitis media surgery: a multicentre retrospective study. Clin Otolaryngol 2016; 42:521-527. [PMID: 27661064 DOI: 10.1111/coa.12755] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/19/2016] [Indexed: 12/01/2022]
Abstract
OBJECTIVES To give an insight into why, when and where iatrogenic facial nerve (FN) injuries may occur and to explain how to deal with them in an emergency setting. DESIGN AND SETTING Multicentre retrospective study in eight tertiary referral hospitals over 17 years. PARTICIPANTS Twenty patients with partial or total FN injury during surgery for chronic otitis media (COM) were revised. MAIN OUTCOME MEASURES Indication and type of surgery, experience of the surgeon, intra- and postoperative findings, value of CT scanning, patient management and final FN outcome were recorded. RESULTS In 12 cases, the nerve was completely transected, but the surgeon was unaware in 11 cases. A minority of cases occurred in academic teaching hospitals. Tympanic segment, second genu and proximal mastoid segments were the sites involved during injury. The FN was not deliberately identified in 18 patients at the time of injury, and nerve monitoring was only applied in one patient. Before revision surgery, CT scanning correctly identified the lesion site in 11 of 12 cases and depicted additional lesions such as damage to the lateral semicircular canal. A greater auricular nerve graft was interposed in 10 cases of total transection and in one partially lesioned nerve: seven of them resulted in an HB III functional outcome. In two of the transected nerves, rerouting and direct end-to-end anastomosis was applied. A simple FN decompression was used in four cases of superficially traumatised nerves. CONCLUSIONS We suggest checklists for preoperative, intraoperative and postoperative management to prevent and treat iatrogenic FN injury during COM surgery.
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Affiliation(s)
- T Linder
- Department of Otorhinolaryngology Head and Neck Surgery, Luzerner Kantonsspital, Luzern, Switzerland
| | - S Mulazimoglu
- Department of Otorhinolaryngology Head and Neck Surgery, Luzerner Kantonsspital, Luzern, Switzerland
| | - T El Hadi
- Hearing and Balance Center, Dr El Hadi ENT Private Practice, Fès, Morocco
| | - V Darrouzet
- Department of Otolaryngology and Skull Base Surgery, Pellegrin University Hospital, Bordeaux, France
| | - D Ayache
- Otology-Neurotology Unit, Fondation Adolphe De Rothschild, Paris, France
| | - T Somers
- Department of Otorhinolaryngology Head and Neck Surgery, University of Antwerp, Antwerp, Belgium
| | - S Schmerber
- Department of Otorhinolaryngology Head and Neck Surgery, University of Grenoble, Grenoble, France
| | - C Vincent
- Department of Otolaryngology, Lille University, Lille, France
| | - M Mondain
- Department of Otorhinolaryngology Head and Neck Surgery, University of Montpellier, Montpellier, France
| | - E Lescanne
- Department of Otolaryngology, Tours University, Tours, France
| | - D Bonnard
- Department of Otolaryngology and Skull Base Surgery, Pellegrin University Hospital, Bordeaux, France
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De Seta D, Nguyen Y, Bonnard D, Ferrary E, Godey B, Bakhos D, Mondain M, Deguine O, Sterkers O, Bernardeschi D, Mosnier I. The Role of Electrode Placement in Bilateral Simultaneously Cochlear-Implanted Adult Patients. Otolaryngol Head Neck Surg 2016; 155:485-93. [DOI: 10.1177/0194599816645774] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Accepted: 04/01/2016] [Indexed: 11/16/2022]
Abstract
Objective To evaluate the influence of the electrode placement on hearing performance in adult patients who were simultaneously and bilaterally cochlear implanted. Study Design Case series with planned data collection. Setting Tertiary referral university centers. Subjects and Methods The postoperative computed tomography scan was studied for 19 patients who were simultaneously and bilaterally implanted with a long straight electrode array. The size of the cochlea was measured in consideration of the major cochlear diameter and cochlear height. The electrode-to-modiolus distance for the electrodes positioned at 180 and 360 degrees and the angular depth of insertion of the array were also measured. Speech perception was assessed at 1 and 5 years postimplantation with disyllabic word lists in quiet and in noise, with the speech coming from the front and a background noise (cocktail party) coming from 5 loudspeakers. Results At 1 year postimplantation, the electrode-to-modiolus distance at 180 degrees was correlated with the speech perception scores in both quiet and noise. In patients with a full electrode insertion, no correlation was found between the angular depth of insertion and hearing performance. The speech perception scores in noise gradually declined as a function of the number of inserted and active electrodes. No relationship between electrode position and speech perception scores was found at 5 years postimplantation. Conclusion In adult patients who were simultaneously and bilaterally implanted, the use of a long straight array, the full electrode array insertion, and the proximity to the modiolus might be determining factors to obtain the best speech performance at 1 year, without influence on the speech perception scores after long-term use.
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Affiliation(s)
- Daniele De Seta
- AP-HP, Groupe Hospitalier Pitié-Salpêtrière, Unité Otologie, Implants auditifs et Chirurgie de la base du crâne, 75013, Paris, France
- Sensory Organs Department, Sapienza University of Rome, Rome, Italy
| | - Yann Nguyen
- AP-HP, Groupe Hospitalier Pitié-Salpêtrière, Unité Otologie, Implants auditifs et Chirurgie de la base du crâne, 75013, Paris, France
- UMR-S 1159 Inserm / Université Paris 6 Pierre et Marie Curie, France
| | | | - Evelyne Ferrary
- AP-HP, Groupe Hospitalier Pitié-Salpêtrière, Unité Otologie, Implants auditifs et Chirurgie de la base du crâne, 75013, Paris, France
- UMR-S 1159 Inserm / Université Paris 6 Pierre et Marie Curie, France
| | - Benoit Godey
- Service ORL, Hôpital Pontchailloux, Rennes, France
| | | | - Michel Mondain
- Service ORL, Hôpital Gui de Chauliac, Montpellier, France
| | | | - Olivier Sterkers
- AP-HP, Groupe Hospitalier Pitié-Salpêtrière, Unité Otologie, Implants auditifs et Chirurgie de la base du crâne, 75013, Paris, France
- UMR-S 1159 Inserm / Université Paris 6 Pierre et Marie Curie, France
| | - Daniele Bernardeschi
- AP-HP, Groupe Hospitalier Pitié-Salpêtrière, Unité Otologie, Implants auditifs et Chirurgie de la base du crâne, 75013, Paris, France
- UMR-S 1159 Inserm / Université Paris 6 Pierre et Marie Curie, France
| | - Isabelle Mosnier
- AP-HP, Groupe Hospitalier Pitié-Salpêtrière, Unité Otologie, Implants auditifs et Chirurgie de la base du crâne, 75013, Paris, France
- UMR-S 1159 Inserm / Université Paris 6 Pierre et Marie Curie, France
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20
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Bonnard D, Dauman R, Semal C, Demany L. Harmonic fusion and pitch affinity: Is there a direct link? Hear Res 2016; 333:247-254. [DOI: 10.1016/j.heares.2015.08.015] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Revised: 08/19/2015] [Accepted: 08/27/2015] [Indexed: 10/23/2022]
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21
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Sagardoy T, de Mones E, Bonnard D, Darrouzet V, Franco-Vidal V. Arachnoid cyst of the fallopian canal and geniculate ganglion area: our experience of 9 cases. Clin Otolaryngol 2016; 42:461-466. [PMID: 26860697 DOI: 10.1111/coa.12629] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/18/2016] [Indexed: 11/30/2022]
Affiliation(s)
- T Sagardoy
- Department of Otolaryngology and Skull Base Surgery, Pellegrin University Hospital, Bordeaux, France
| | - E de Mones
- Department of Otolaryngology and Skull Base Surgery, Pellegrin University Hospital, Bordeaux, France
| | - D Bonnard
- Department of Otolaryngology and Skull Base Surgery, Pellegrin University Hospital, Bordeaux, France
| | - V Darrouzet
- Department of Otolaryngology and Skull Base Surgery, Pellegrin University Hospital, Bordeaux, France
| | - V Franco-Vidal
- Department of Otolaryngology and Skull Base Surgery, Pellegrin University Hospital, Bordeaux, France
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22
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Thomeer H, Bonnard D, Castetbon V, Franco-Vidal V, Darrouzet P, Darrouzet V. Long-term results of middle fossa plugging of superior semicircular canal dehiscences: clinically and instrumentally demonstrated efficiency in a retrospective series of 16 ears. Eur Arch Otorhinolaryngol 2015. [PMID: 26205152 PMCID: PMC4899492 DOI: 10.1007/s00405-015-3715-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [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] [Indexed: 11/25/2022]
Abstract
The objective of this study is to report the surgical outcome after middle fossa approach (MFA) plugging in patients suffering from a superior semi-circular canal dehiscence (SCD) syndrome. This is a retrospective case review. Tertiary referral center. Sixteen ears in 13 patients with a SCD syndrome suffering from severe and disabling vestibular symptoms with a bony dehiscence on CT scan >3 mm and decreased threshold of cervical vestibular evoked potentials (cVEMPs). We assessed preoperatively: clinical symptoms, hearing, cVEMPs threshold, size of dehiscence and videonystagmography (VNG) with caloric and 100 Hz vibratory tests. Postoperatively, we noted occurrences of neurosurgical complication, evolution of audiological and vestibular symptoms, and evaluation of cVEMP data. Tullio’s phenomenon was observed in 13 cases (81.3 %) and subjectively reported hearing loss in seven (43.7 %). All patients were so disabled that they had to stop working. No neurosurgical complications were observed in the postoperative course. In three cases (16.6 %), an ipsilateral and transitory immediate postoperative vestibular deficit associated with a sensorineural hearing loss (SNHL) was noted, which totally resolved with steroids and bed rest. All patients were relieved of audiological and vestibular symptoms and could return to normal activity with a mean follow-up of 31.1 months (range 3–95). No patient had residual SNHL. cVEMPs were performed in 14 ears postoperatively and were normalized in 12 (85.7 %). Two of the three patients operated on both sides kept some degree of unsteadiness and oscillopsia. MFA plugging of the superior semi-circular canal is an efficient and non-hearing deteriorating procedure.
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Affiliation(s)
- Hans Thomeer
- Department of Otolaryngology and Skull Base Surgery, Pellegrin University Hospital, Bordeaux Segalen University, 33000, Bordeaux, France.
- Department of Otorhinolaryngology, University Medical Center Utrecht, 85500, Heidelberglaan 100, 3508 GA, Utrecht, The Netherlands.
| | - Damien Bonnard
- Department of Otolaryngology and Skull Base Surgery, Pellegrin University Hospital, Bordeaux Segalen University, 33000, Bordeaux, France
| | - Vincent Castetbon
- Department of Otolaryngology and Skull Base Surgery, Pellegrin University Hospital, Bordeaux Segalen University, 33000, Bordeaux, France
| | - Valérie Franco-Vidal
- Department of Otolaryngology and Skull Base Surgery, Pellegrin University Hospital, Bordeaux Segalen University, 33000, Bordeaux, France
| | - Patricia Darrouzet
- Department of Otolaryngology and Skull Base Surgery, Pellegrin University Hospital, Bordeaux Segalen University, 33000, Bordeaux, France
| | - Vincent Darrouzet
- Department of Otolaryngology and Skull Base Surgery, Pellegrin University Hospital, Bordeaux Segalen University, 33000, Bordeaux, France
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van Bel N, van der Velden Y, Bonnard D, Le Rouzic E, Das AT, Benarous R, Berkhout B. The allosteric HIV-1 integrase inhibitor BI-D affects virion maturation but does not influence packaging of a functional RNA genome. PLoS One 2014; 9:e103552. [PMID: 25072705 PMCID: PMC4114784 DOI: 10.1371/journal.pone.0103552] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Accepted: 05/20/2014] [Indexed: 12/30/2022] Open
Abstract
The viral integrase (IN) is an essential protein for HIV-1 replication. IN inserts the viral dsDNA into the host chromosome, thereby aided by the cellular co-factor LEDGF/p75. Recently a new class of integrase inhibitors was described: allosteric IN inhibitors (ALLINIs). Although designed to interfere with the IN-LEDGF/p75 interaction to block HIV DNA integration during the early phase of HIV-1 replication, the major impact was surprisingly found on the process of virus maturation during the late phase, causing a reverse transcription defect upon infection of target cells. Virus particles produced in the presence of an ALLINI are misformed with the ribonucleoprotein located outside the virus core. Virus assembly and maturation are highly orchestrated and regulated processes in which several viral proteins and RNA molecules closely interact. It is therefore of interest to study whether ALLINIs have unpredicted pleiotropic effects on these RNA-related processes. We confirm that the ALLINI BI-D inhibits virus replication and that the produced virus is non-infectious. Furthermore, we show that the wild-type level of HIV-1 genomic RNA is packaged in virions and these genomes are in a dimeric state. The tRNAlys3 primer for reverse transcription was properly placed on this genomic RNA and could be extended ex vivo. In addition, the packaged reverse transcriptase enzyme was fully active when extracted from virions. As the RNA and enzyme components for reverse transcription are properly present in virions produced in the presence of BI-D, the inhibition of reverse transcription is likely to reflect the mislocalization of the components in the aberrant virus particle.
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Affiliation(s)
- Nikki van Bel
- Laboratory of Experimental Virology, Department of Medical Microbiology, Center for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
| | - Yme van der Velden
- Laboratory of Experimental Virology, Department of Medical Microbiology, Center for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
| | | | | | - Atze T. Das
- Laboratory of Experimental Virology, Department of Medical Microbiology, Center for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
| | | | - Ben Berkhout
- Laboratory of Experimental Virology, Department of Medical Microbiology, Center for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
- * E-mail:
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Engelhardt J, Dauman R, Arné P, Allard M, Dauman N, Branchard O, Perez P, Germain C, Caire F, Bonnard D, Cuny E. Effect of chronic cortical stimulation on chronic severe tinnitus: a prospective randomized double-blind cross-over trial and long-term follow up. Brain Stimul 2014; 7:694-700. [PMID: 25017670 DOI: 10.1016/j.brs.2014.05.008] [Citation(s) in RCA: 16] [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: 01/18/2014] [Revised: 05/27/2014] [Accepted: 05/29/2014] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND Chronic severe tinnitus can be greatly detrimental to quality of life. Some authors have reported benefit of repetitive transcranial magnetic stimulation, others of electrical cortical stimulation by stimulating the Heschl's gyrus or secondary auditory areas. OBJECTIVE To evaluate the efficacy of chronic electrical epidural stimulation of the auditory cortex on severe and disabling tinnitus. METHOD In this double-blind randomized cross-over, patients with chronic (at least 2 years), severe (Strukturierte Tinnitus-Interview, STI score > 19), unilateral or strongly lateralized tinnitus were included. After open-phase stimulation for 4 months, patients were randomized into 2 groups for double-blind stimulation with cross-over between significant and non-significant phases and wash-out in between. Each of the 3 phases was 2 weeks in duration. Patients were chronically stimulated and followed if not explanted. A decrease of STI score >35% was considered as clinically significant. RESULTS None of the 9 patients included achieved significant improvement during the double-blind phase. Four were explanted, 2 owing to lack of effect, one for breast cancer under the stimulator, and another for psychiatric decompensation. Five are still stimulated. Three felt slight to great subjective effectiveness, the remaining 2 reported benefits and still requested stimulation. CONCLUSIONS This study did not find an objective efficiency of chronic cortical stimulation for severe and resistant tinnitus. The discordance between the results in double-blind and open evaluations could be related to a placebo effect of surgery, but may also be explained by a poorly defined target, a too short randomized phase, or inappropriate outcome measures. Clinical trial reference: NCT00486577.
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Affiliation(s)
| | - René Dauman
- CHU Bordeaux, Service d'Oto-Rhino-Laryngologie, France; University of Bordeaux, France
| | - Pierre Arné
- CHU Bordeaux, Service d'Exploration Fonctionnelle Neurologique, France
| | - Michèle Allard
- University of Bordeaux, INCIA, UMR 5287 and CNRS, INCIA, UMR 5287, France
| | - Nicolas Dauman
- University of Poitiers, CAPS-EA4050, Department of Psychology, France
| | | | - Paul Perez
- CHU Bordeaux, Unité de Soutien Méthodologique à la Recherche Clinique (USMR), Pôle de Santé Publique, France
| | - Christine Germain
- CHU Bordeaux, Unité de Soutien Méthodologique à la Recherche Clinique (USMR), Pôle de Santé Publique, France
| | - François Caire
- CHU Limoges Service de Neurochirurgie, and ERMA, Univ. Limoges, France
| | - Damien Bonnard
- CHU Bordeaux, Service d'Oto-Rhino-Laryngologie, France; University of Bordeaux, France
| | - Emmanuel Cuny
- CHU Bordeaux, Service de Neurochirurgie, France; University of Bordeaux, France.
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Bonnard D, Lautissier S, Bosset-Audoit A, Coriat G, Beraha M, Maunoury A, Martel J, Darrouzet V, Bébéar JP, Dauman R. Comparison between Bilateral Cochlear Implants and Neurelec Digisonict SP Binaural Cochlear Implant: Speech Perception, Sound Localization and Patient Self-Assessment. ACTA ACUST UNITED AC 2013; 18:171-83. [DOI: 10.1159/000346933] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2012] [Accepted: 12/28/2012] [Indexed: 11/19/2022]
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26
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Bonnard D, Micheyl C, Semal C, Dauman R, Demany L. Auditory discrimination of frequency ratios: the octave singularity. J Exp Psychol Hum Percept Perform 2012; 39:788-801. [PMID: 23088507 DOI: 10.1037/a0030095] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Sensitivity to frequency ratios is essential for the perceptual processing of complex sounds and the appreciation of music. This study assessed the effect of ratio simplicity on ratio discrimination for pure tones presented either simultaneously or sequentially. Each stimulus consisted of four 100-ms pure tones, equally spaced in terms of frequency ratio and presented at a low intensity to limit interactions in the auditory periphery. Listeners had to discriminate between a reference frequency ratio of 0.97 octave (about 1.96:1) and target frequency ratios, which were larger than the reference. In the simultaneous condition, the obtained psychometric functions were nonmonotonic: as the target frequency ratio increased from 0.98 octave to 1.04 octaves, discrimination performance initially increased, then decreased, and then increased again; performance was better when the target was exactly one octave (2:1) than when the target was slightly larger. In the sequential condition, by contrast, the psychometric functions were monotonic and there was no effect of frequency ratio simplicity. A control experiment verified that the non-monotonicity observed in the simultaneous condition did not originate from peripheral interactions between the tones. Our results indicate that simultaneous octaves are recognized as "special" frequency intervals by a mechanism that is insensitive to the sign (positive or negative) of deviations from the octave, whereas this is apparently not the case for sequential octaves.
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Affiliation(s)
- Damien Bonnard
- INCIA, Université de Bordeaux and CNRS, 146 rue Leo-Saignat, Bordeaux Cedex, France
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Thibault K, Carrel D, Bonnard D, Gallatz K, Simon A, Biard M, Pezet S, Palkovits M, Lenkei Z. Activation-Dependent Subcellular Distribution Patterns of CB1 Cannabinoid Receptors in the Rat Forebrain. Cereb Cortex 2012; 23:2581-91. [DOI: 10.1093/cercor/bhs240] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [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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Milhe de Saint Victor S, Bonnard D, Darrouzet V, Bellec O, Franco-Vidal V. Stage II vestibular schwannoma: predictive factors for postoperative hearing loss and facial palsy. Eur Ann Otorhinolaryngol Head Neck Dis 2012; 129:87-92. [PMID: 22226671 DOI: 10.1016/j.anorl.2011.09.001] [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] [Received: 01/06/2011] [Revised: 05/16/2011] [Accepted: 09/06/2011] [Indexed: 11/16/2022]
Abstract
OBJECTIVES To assess predictive factors for deafness and facial palsy after vestibular schwannoma surgery on a translabyrinthine or retrolabyrinthine approach, and to compare sequela results to those for gamma knife radiosurgery. PATIENTS AND METHODS A retrospective study included 70 patients operated on for stage II vestibular schwannoma (Koos classification). Postoperative hearing was assessed on pure-tone average and speech discrimination score, and facial palsy on the House and Brackmann classification, preoperatively and at 1 year postoperatively. Various predictive factors were assessed for both. Statistical analysis used the Fischer exact test, with a significance threshold of P<0.05. RESULTS Hearing was conserved in 18.9% of patients operated on with a retrolabyrinthine approach, with 8.1% conserving useful hearing. Facial function was conserved in 91.4%. Predictive factors for hearing conservation did not achieve statistical significance, but showed trends for: preoperative pure-tone average threshold≤30dB and speech discrimination score≥ 70%, age less than 55 years, tinnitus, nearly normal auditory brainstem response (ABR) latency, and homogeneous tumor on MRI. Predictive factors for conserved facial function likewise did not achieve statistical significance, but showed trends for: age less than 55 years, deafness of progressive onset, absence of cardiovascular risk factors, nearly normal ABR latency and tumor size<13.5mm on MRI. CONCLUSION Facial nerve risk is largely the same with surgery or gamma knife radiosurgery. Concerning hearing, gamma knife radiosurgery seems to provide better hearing conservation, but only over the short term.
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Affiliation(s)
- S Milhe de Saint Victor
- Service d'otorhinolaryngologie et de chirurgie de la base du crâne, CHU Pellegrin, université Victor-Segalen Bordeaux-2, place Amélie-Raba-Léon, Bordeaux cedex, France
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Guille J, De Mones Del Pujol E, Bonnard D, Darrouzet V, Franco-Vidal V. [Chondrocalcinosis of the temporomandibular joint revealed by a hearing loss: a case report]. Rev Laryngol Otol Rhinol (Bord) 2011; 132:167-172. [PMID: 22533072] [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] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
INTRODUCTION Chondrocalcinosis is a microcrystalline arthropathy that principally affects the knee. It is a rare disorder, usually asymptomatic, that occurs mainly in the elderly people. PURPOSE To report a case of a temporomandibular joint chondrocalcinosis with ossicular contact revealed by a conductive hearing loss. CASE REPORT We describe the case of a 57-year-old man with a right conductive sudden hearing loss of 15 dB. The CT scan revealed a lytic lesion in the right attic extended to the middle cerebral fossa in contact with the ossicles with a suspicion of lysis of the head of the malleus. MRI showed a lesion enhancing after gadolinium injection on T1 weighted images. A biopsy revealed a chondrocalcinosis of the temporomandibular joint. Due to the complexity of surgical excision and the benin character of the lesion, a medical treatment and a radiologic follow-up every six months were proposed. CONCLUSION Chondrocalcinosis of the temporo-mandibular joint is rare especially when it is revealed by a hearing loss. We present here a review of the literature.
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Affiliation(s)
- J Guille
- CHU Pellegrin, Service ORL et Chirurgie Cervico-Faciale, Pôle Tête et Cou FX Michelet, Place A. Raba Léon, 33076 Bordeaux cedex, France
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Abstract
The CB1 cannabinoid receptor (CB1R) displays a significant level of ligand-independent (i.e. constitutive) activity, either when heterologously expressed in nonneuronal cells or in neurons where CB1Rs are endogenous. The present study investigates the consequences of constitutive activity on the intracellular trafficking of CB1R. When transfected in HEK-293 cells, CB1R is present at the plasma membrane, but a substantial proportion ( approximately 85%) of receptors is localized in intracellular vesicles. Detailed analysis of CB1-EGFP expressed in HEK-293 cells shows that the intracellular CB1R population is mostly of endocytic origin and that treatment with inverse agonist AM281 traps CB1R at the plasma membrane through a monensin-sensitive recycling pathway. Co-transfection with dominant positive or dominant negative mutants of the small GTPases Rab5 and Rab4, but not Rab11, profoundly modifies the steady-state and ligand-induced intracellular distribution of CB1R, indicating that constitutive endocytosis is Rab5-dependent, whereas constitutive recycling is mediated by Rab4. In conclusion, our results indicate that, due to its natural constitutive activity, CB1R permanently and constitutively cycles between plasma membrane and endosomes, leading to a predominantly intracellular localization at steady state.
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Affiliation(s)
- Christophe Leterrier
- ESPCI-CNRS UMR 7637, Laboratoire Neurobiologie et Diversité Cellulaire, Ecole Supérieure de Physique et de Chimie Industrielles, 10 Rue Vauquelin, 75231 Paris Cedex 05, France
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Eholie SP, Adou-Brynh D, Domoua K, Kakou A, Ehui E, Gouamene A, Bonnard D, Aoussi E, Bissagnene E, Kadio A. [Adult non-viral lymphocytic meningitis in Abidjan (Côte d'Ivoire)]. Bull Soc Pathol Exot 2000; 93:50-4. [PMID: 10774496] [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] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Our prospective and longitudinal study aimed to analyse the aetiologies, clinical features and prognostic of non viral lymphocytes meningitis (NVLM). We recruited 131 patients, 77 males (59%) and 54 females (41%) sex-ratio 1.4. The mean age was 35 years [15-67]. 117 patients were HIV positive (89%) and 14 (11%) were HIV negative. Feverish meningoencephalitis was present in 85% of cases, with 7 days for mean delay of admission into hospital. 80 germs were found in the C.S.F. 70 Cryptococcus neoformans, 4 Mycobacterium tuberculosis, 3 Streptococcus pneumoniae, 1 Candida albicans, 1 Neisseria meningitis and 1 Trypanosoma gambiense. 63 aetiologies were linked to lymphocytes meningitis by indirect deduction: 41 cases of tuberculous meningitis with lung X-ray anomalies and M. tuberculosis in sputum (11 times), 11 cases of cerebral malaria with Plasmodium falciparum in blood, 11 cases of cerebral toxoplasmosis by significant features with cerebral tomodensitometry. Letality was 53%, 35% of patients improved and 12% were lost to follow-up. Our study shows the difficulties in the management of the NVLM, due to the delay of diagnosis, particularly for tuberculous meningitis.
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Affiliation(s)
- S P Eholie
- Service des maladies infectieuses et tropicales, CHU de Treichville, Abidjan, Côte d'Ivoire
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Mukadi YD, Wiktor SZ, Coulibaly IM, Coulibaly D, Mbengue A, Folquet AM, Ackah A, Sassan-Morokro M, Bonnard D, Maurice C, Nolan C, Kreiss JK, Greenberg AE. Impact of HIV infection on the development, clinical presentation, and outcome of tuberculosis among children in Abidjan, Côte d'Ivoire. AIDS 1997; 11:1151-8. [PMID: 9233463 DOI: 10.1097/00002030-199709000-00011] [Citation(s) in RCA: 97] [Impact Index Per Article: 3.6] [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: 02/04/2023]
Abstract
OBJECTIVE To assess the impact of HIV infection upon the development, clinical presentation, and outcome of tuberculosis (TB) among children. DESIGN Case-control study and prospective cohort study. METHODS From March 1994 to November 1995, children aged 0-9 years with newly diagnosed TB were enrolled at the two outpatient TB centers and the two principal university hospitals in Abidjan, Côte d'Ivoire. Children were examined, blood samples were collected for HIV serology and lymphocyte phenotyping, chest radiography was performed, and gastric aspirates and sputum samples were collected for acid-fast bacilli smear and culture. Children were then followed every 2 months during a standard 6-month course of anti-TB therapy. To examine risk factors for TB, age- and sex-matched healthy control children were enrolled from among the siblings of children referred for TB skin testing. RESULTS Overall, 161 children with TB were enrolled, including 39 (24%) with culture-confirmed pulmonary TB, 80 (50%) with clinically diagnosed pulmonary TB, and 42 (26%) with extrapulmonary TB. Children with TB were significantly more likely than 161 control children to be HIV-seropositive (19 versus 0%), to have a past TB contact (55 versus 16%) and to live in very low socioeconomic status housing (24 versus 6%). No significant differences between HIV-seropositive and seronegative children were found in the distribution of radiologic abnormalities for pulmonary TB or in the site of extrapulmonary TB. The mortality rate in HIV-seropositive children was significantly higher than in seronegative children (23 versus 4%; relative risk, 3.6; 95% confidence interval, 2.0-6.6), and all deaths in HIV-seropositive children with available lymphocyte subtyping results occurred in those with a CD4 percentage of < 10%. CONCLUSIONS This study documents the importance of HIV infection as an independent risk factor for the development of TB in children, and demonstrates that HIV-related immunosuppression is a critical risk factor for mortality in this population.
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Affiliation(s)
- Y D Mukadi
- Project RETRO-Cl, Abidjan, Côte d'Ivoire
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