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Hammoudi N, Hassid D, Bonnet J, Tran Minh ML, Baudry C, Vauthier A, Chedouba L, Houzé P, Lourenco N, Aparicio T, Gornet JM, Allez M. Infliximab desensitization in patients with inflammatory bowel diseases: a safe therapeutic alternative. Scand J Gastroenterol 2024; 59:553-560. [PMID: 38353236 DOI: 10.1080/00365521.2024.2316765] [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: 11/29/2023] [Accepted: 02/05/2024] [Indexed: 04/26/2024]
Abstract
BACKGROUND Hypersensitivity reactions (HSR) to the administration of infliximab (IFX) in Inflammatory Bowel Diseases (IBD) patients are not rare and usually lead to drug discontinuation. We report data on safety and effectiveness of desensitization to IFX in patients with previous HSR. METHODS We conducted a retrospective monocentric observational study. Patients for whom a desensitization protocol to IFX was realized after a previous HSR were included. Anti-drug antibodies (ADA) and IFX trough levels at both inclusion and six months after desensitization were collected. Clinical outcomes, including recurrence of HSR were evaluated. RESULTS From 2005 to 2020, 27 patients (Crohn's Disease: 26 (96%) were included). Desensitization after HSR was performed after a median time of 10.4 months (2.9-33.1). Nineteen (70%) patients received immunosuppressants at time of desensitization. Eight (30%) patients presented HSR at first (n = 2), second (n = 4) or third (n = 2) IFX perfusion after desensitization. None led to intensive care unit transfer or death. Thirteen (48%) had clinical response at 6 months and 8 (29%) were still under IFX treatment two years after desensitization. IFX trough levels and ADA were available for 14 patients at time of desensitization. Most patients (12 out of 14) had ADA at a high level. At 6 months, among the 7 patients with long term response to IFX, 4 presented a decrease of ADA titers and 2 had a significant trough level of IFX. CONCLUSION IFX desensitization in patients with IBD is a safe therapeutic alternative and represents a potential option for patients refractory to multiple biologics.What is already known? Hypersensitivity reactions to the administration of infliximab is frequent. Occurrence of hypersensitivity reaction, either immediate or delayed, usually leads to permanent drug discontinuation.What is new here? Infliximab desensitization is well tolerated with no hypersensitivity reaction recurrence in 70% of patients. Clinical success at 6 months was of 48% and around a third of patients remained under infliximab therapy two years after desensitization. Antidrug antibodies decreased and infliximab trough levels increased in these patients showing the impact of desensitization on immunogenicity.How can this study help patient care? Infliximab desensitization represents a potential option for patients refractory to multiple biologics who presented hypersensitivity reaction to the drug.
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Affiliation(s)
- Nassim Hammoudi
- INSERM U1160, EMiLy, Institut de Recherche Saint-Louis, Université de Paris Cité, Paris, France
- Gastroenterology Department, AP-HP, Hôpital Saint-Louis/Lariboisière, Paris, France
| | - Déborah Hassid
- Gastroenterology Department, AP-HP, Hôpital Saint-Louis/Lariboisière, Paris, France
| | - Joëlle Bonnet
- INSERM U1160, EMiLy, Institut de Recherche Saint-Louis, Université de Paris Cité, Paris, France
- Gastroenterology Department, AP-HP, Hôpital Saint-Louis/Lariboisière, Paris, France
| | - My-Linh Tran Minh
- Gastroenterology Department, AP-HP, Hôpital Saint-Louis/Lariboisière, Paris, France
| | - Clotilde Baudry
- Gastroenterology Department, AP-HP, Hôpital Saint-Louis/Lariboisière, Paris, France
| | - Anne Vauthier
- Gastroenterology Department, AP-HP, Hôpital Saint-Louis/Lariboisière, Paris, France
| | - Leila Chedouba
- INSERM U1160, EMiLy, Institut de Recherche Saint-Louis, Université de Paris Cité, Paris, France
- Gastroenterology Department, AP-HP, Hôpital Saint-Louis/Lariboisière, Paris, France
| | - Pascal Houzé
- Laboratory of Toxicology, Federation of Toxicology, Lariboisière Hospital, Paris, France
- INSERM UMRS-1144, University of Paris, Paris, France
| | - Nelson Lourenco
- Gastroenterology Department, AP-HP, Hôpital Saint-Louis/Lariboisière, Paris, France
| | - Thomas Aparicio
- INSERM U1160, EMiLy, Institut de Recherche Saint-Louis, Université de Paris Cité, Paris, France
- Gastroenterology Department, AP-HP, Hôpital Saint-Louis/Lariboisière, Paris, France
| | - Jean-Marc Gornet
- Gastroenterology Department, AP-HP, Hôpital Saint-Louis/Lariboisière, Paris, France
| | - Matthieu Allez
- INSERM U1160, EMiLy, Institut de Recherche Saint-Louis, Université de Paris Cité, Paris, France
- Gastroenterology Department, AP-HP, Hôpital Saint-Louis/Lariboisière, Paris, France
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Hammoudi N, Hamoudi S, Bonnereau J, Bottois H, Pérez K, Bezault M, Hassid D, Chardiny V, Grand C, Gergaud B, Bonnet J, Chedouba L, Tran Minh ML, Gornet JM, Baudry C, Corte H, Maggiori L, Toubert A, McBride J, Brochier C, Neighbors M, Le Bourhis L, Allez M. Autologous organoid co-culture model reveals T cell-driven epithelial cell death in Crohn's Disease. Front Immunol 2022; 13:1008456. [PMID: 36439157 PMCID: PMC9685428 DOI: 10.3389/fimmu.2022.1008456] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [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: 07/31/2022] [Accepted: 10/24/2022] [Indexed: 09/15/2023] Open
Abstract
Lympho-epithelial interactions between intestinal T resident memory cells (Trm) and the epithelium have been associated with inflammatory bowel disease (IBD) activity. We developed ex vivo autologous organoid-mucosal T cell cocultures to functionally assess lymphoepithelial interactions in Crohn's Disease (CD) patients compared to controls. We demonstrate the direct epithelial cell death induced by autologous mucosal T cells in CD patients but not in controls. These findings were positively correlated with T cell infiltration of the organoids. This potential was inhibited by limiting lympho-epithelial interactions through CD103 and NKG2D blocking antibodies. These data directly demonstrate for the first time the direct deleterious effect of mucosal T cells on the epithelium of CD patients. Such ex-vivo models are promising techniques to unravel the pathophysiology of these diseases and the potential mode of action of current and future therapies.
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Affiliation(s)
- Nassim Hammoudi
- Université de Paris, INSERM U1160, EMiLy, Institut de Recherche Saint-Louis, Paris, France
- Gastroenterology Department, AP-HP, Hôpital Saint-Louis/Lariboisière, Paris, France
| | - Sarah Hamoudi
- Université de Paris, INSERM U1160, EMiLy, Institut de Recherche Saint-Louis, Paris, France
| | - Julie Bonnereau
- Université de Paris, INSERM U1160, EMiLy, Institut de Recherche Saint-Louis, Paris, France
| | - Hugo Bottois
- Université de Paris, INSERM U1160, EMiLy, Institut de Recherche Saint-Louis, Paris, France
| | - Kevin Pérez
- Université de Paris, INSERM U1160, EMiLy, Institut de Recherche Saint-Louis, Paris, France
| | - Madeleine Bezault
- Université de Paris, INSERM U1160, EMiLy, Institut de Recherche Saint-Louis, Paris, France
| | - Déborah Hassid
- Université de Paris, INSERM U1160, EMiLy, Institut de Recherche Saint-Louis, Paris, France
- Gastroenterology Department, AP-HP, Hôpital Saint-Louis/Lariboisière, Paris, France
| | - Victor Chardiny
- Université de Paris, INSERM U1160, EMiLy, Institut de Recherche Saint-Louis, Paris, France
| | - Céline Grand
- Université de Paris, INSERM U1160, EMiLy, Institut de Recherche Saint-Louis, Paris, France
| | - Brice Gergaud
- Université de Paris, INSERM U1160, EMiLy, Institut de Recherche Saint-Louis, Paris, France
| | - Joëlle Bonnet
- Gastroenterology Department, AP-HP, Hôpital Saint-Louis/Lariboisière, Paris, France
| | - Leila Chedouba
- Gastroenterology Department, AP-HP, Hôpital Saint-Louis/Lariboisière, Paris, France
| | - My-Linh Tran Minh
- Gastroenterology Department, AP-HP, Hôpital Saint-Louis/Lariboisière, Paris, France
| | - Jean-Marc Gornet
- Gastroenterology Department, AP-HP, Hôpital Saint-Louis/Lariboisière, Paris, France
| | - Clotilde Baudry
- Gastroenterology Department, AP-HP, Hôpital Saint-Louis/Lariboisière, Paris, France
| | - Hélène Corte
- Digestive Surgery Department, AP-HP, Hôpital Saint-Louis/Lariboisière, Paris, France
| | - Léon Maggiori
- Digestive Surgery Department, AP-HP, Hôpital Saint-Louis/Lariboisière, Paris, France
| | - Antoine Toubert
- Université de Paris, INSERM U1160, EMiLy, Institut de Recherche Saint-Louis, Paris, France
| | - Jacqueline McBride
- OMNI Biomarker Development, Genentech Inc., South San Francisco, CA, United States
| | | | - Margaret Neighbors
- OMNI Biomarker Development, Genentech Inc., South San Francisco, CA, United States
| | - Lionel Le Bourhis
- Université de Paris, INSERM U1160, EMiLy, Institut de Recherche Saint-Louis, Paris, France
| | - Matthieu Allez
- Université de Paris, INSERM U1160, EMiLy, Institut de Recherche Saint-Louis, Paris, France
- Gastroenterology Department, AP-HP, Hôpital Saint-Louis/Lariboisière, Paris, France
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Guillo L, Delanaye P, Flamant M, Figueres L, Karam S, Lemoine S, Benezech A, Pelletier AL, Amiot A, Caron B, Stefanescu C, Boschetti G, Bouguen G, Rahier JF, Gornet JM, Hugot JP, Bonnet J, Vuitton L, Nachury M, Vidon M, Uzzan M, Serrero M, Dib N, Seksik P, Hebuterne X, Bertocchio JP, Mariat C, Peyrin-Biroulet L. Kidney function monitoring in inflammatory bowel disease: The MONITORED consensus. Dig Liver Dis 2022; 54:309-315. [PMID: 34866011 DOI: 10.1016/j.dld.2021.11.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [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: 09/06/2021] [Revised: 11/09/2021] [Accepted: 11/10/2021] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND AIMS Patients with inflammatory bowel diseases (IBD) are exposed to drug-related nephrotoxicity and kidney-related extra-intestinal manifestations (EIMs). Patients should be monitored but guidance is lacking in current international recommendations. The objective of the Kidney Function Monitoring in Inflammatory Bowel Disease (MONITORED) initiative was to achieve an expert consensus about monitoring kidney function in IBD. METHODS A literature review was first conducted. Then, an expert consensus meeting, involving 28 attendees representing French-speaking gastroenterologists and nephrologists, was held as part of an academic initiative on May 28, 2021. An anonymous Delphi process was used to discuss and vote on statements. Agreement was defined as at least 75% of participants voting for any one statement. RESULTS Experts reached consensus on 11 criteria for referral to the nephrologist. Concerning kidney function monitoring, participants unanimously validated the use of serum creatinine with estimation of the glomerular filtration rate via the MDRD or CKD-EPI equations. A blood ionogram and a urine sample with measurement of a protein-to-creatinine ratio were also broadly agreed validated. Experts recommended performing this monitoring at IBD diagnosis, prior introducing a new treatment, and annually for EIMs screening and evaluation of treatment tolerance. An evaluation 3 months after starting mesalamine and then every 6 months was felt necessary, while for biologics an annually monitoring was deemed sufficient. CONCLUSION The MONITORED consensus proposed guidelines on how to monitor kidney function in IBD. These recommendations should be considered in clinical practice to preserve kidney function and ensure the best approach to our patients.
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Affiliation(s)
- Lucas Guillo
- Department of Gastroenterology, University Hospital of Marseille Nord, University of Aix-Marseille, Marseille, France.
| | - Pierre Delanaye
- Department of Nephrology-Dialysis-Transplantation, University of Liège (ULiege), CHU Sart Tilman, Liège, Belgium; Department of Nephrology-Dialysis-Apheresis, Hôpital Universitaire Carémeau, Nîmes, France
| | - Martin Flamant
- Physiologie-Explorations Fonctionnelles, FHU APOLLO, Assistance Publique Hôpitaux de Paris, Hôpital Bichat-Claude Bernard, Université de Paris, CRI, INSERM F-75018, Paris, France
| | - Lucile Figueres
- Université de Nantes, Institut de Transplantation Urologie Néphrologie (ITUN), CHU Nantes, Service de néphrologie-immunologie clinique, CHU de Nantes, France
| | - Sabine Karam
- Division of Nephrology and Hypertension, Saint-George Hospital University Medical Center, Beirut, Lebanon
| | - Sandrine Lemoine
- Service de Néphrologie, dialyse, hypertension et exploration fonctionnelle rénale, Hôpital Edouard Herriot, Lyon, France
| | - Alban Benezech
- Departement of Gastroenterology, Henri Duffaut Hospital, Avignon, France
| | | | - Aurélien Amiot
- Department of Gastroenterology, Groupe Hospitalier Henri Mondor-Albert Chennevier, APHP, EC2M3-EA7375, University of Paris Est Créteil, Créteil, France
| | - Bénédicte Caron
- Department of Gastroenterology and Inserm NGERE U1256, University Hospital of Nancy, University of Lorraine, Vandoeuvre-lès-Nancy, France
| | - Carmen Stefanescu
- Department of Gastroenterology, IBD unit, Beaujon Hospital, APHP, Clichy, France
| | - Gilles Boschetti
- Department of Gastroenterology, Hospices Civils de Lyon, Lyon-Sud Hospital, Pierre Bénite, and INSERM U1111 - CIRI, Lyon, France
| | - Guillaume Bouguen
- Department of Gastroenterology, Centre Hospitalier Universitaire Pontchaillou, Rennes, France
| | | | - Jean-Marc Gornet
- Department of Gastroenterology, Saint-Louis Hospital, APHP, Paris, France
| | - Jean-Pierre Hugot
- Department of Pediatric Gastroenterology, Hôpital Universitaire Robert Debré, Assistance Publique Hôpitaux de Paris, Université de Paris, Paris, France
| | - Joëlle Bonnet
- Department of Gastroenterology, Saint-Louis Hospital, APHP, Paris, France
| | - Lucine Vuitton
- Department of Gastroenterology, Besancon University Hospital, Besancon, France
| | - Maria Nachury
- Univ, Lille, Inserm, CHU Lille, U1286 - INFINITE - Institute for Translational Research in Inflammation, F-59000 Lille, France
| | - Mathias Vidon
- Department of gastroenterology, CHI Créteil, Créteil, France
| | - Mathieu Uzzan
- Department of Gastroenterology, IBD unit, Beaujon Hospital, APHP, Clichy, France
| | - Mélanie Serrero
- Department of Gastroenterology, University Hospital of Marseille Nord, University of Aix-Marseille, Marseille, France
| | - Nina Dib
- Hepato-Gastroenterology Department, Angers University Hospital, Angers, France; HIFIH Laboratory, UPRES 3859, SFR 4208, Angers University, Angers, France
| | - Philippe Seksik
- Department of Gastroenterology, Centre de recherche Saint-Antoine, Sorbonne Université, APHP, Hôpital Saint-Antoine, Paris, France
| | - Xavier Hebuterne
- Gastroenterology and Clinical Nutrition, CHU of Nice, University Côte d'Azur, Nice, France
| | - Jean-Philippe Bertocchio
- Nephrology Department, Pitié-Salpêtrière Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Christophe Mariat
- Service de Néphrologie, Dialyse, Transplantation Rénale, Hôpital Nord, CHU de Saint-Etienne, EA 3065, Université Jean MONNET, Saint-Etienne, France
| | - Laurent Peyrin-Biroulet
- Department of Gastroenterology and Inserm NGERE U1256, University Hospital of Nancy, University of Lorraine, Vandoeuvre-lès-Nancy, France
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Bonnet J, Ducroix-Roubertou S, Rogez S, Ajzenberg D, Courtioux B, Faucher JF. [Sleeping Sickness: A Cause of False Positive HIV Rapid Diagnostic Tests]. Med Trop Sante Int 2021; 1:mtsibulletin.2021.115. [PMID: 35586587 PMCID: PMC9022761 DOI: 10.48327/mtsibulletin.2021.115] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 06/04/2021] [Indexed: 11/17/2022]
Abstract
Approaching the mechanisms related to false positives HIV rapid diagnostic tests (RDT) in patients with sleeping sickness may help to improve the accuracy of screening for HIV infection in areas endemic for Human African trypanosomiasis (HAT).We report on a patient from Congo who was managed like an AIDS-associated meningoencephalitis, based on a false positive HIV RDT at admission, and eventually received a diagnosis of sleeping sickness. A further retrospective cohort study performed in patients with HAT shows that most of positive HIV RDT obtained prior to treatment for sleeping sickness are false positives. We found that half of them were cleared at the end of treatment course, suggesting an early clearance of some antibodies involved in cross-reactivity.A substantial clearance of HIV RDT false positives occurs during therapy for HAT. In areas where Elisa HIV tests are not readily available, repeating the HIV RDT at the end of therapy may help to identify roughly half of false positives.
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Affiliation(s)
- J. Bonnet
- Université de Limoges, U1094, Neuroépidémiologie tropicale, Institut d'épidémiologie et de neurologie tropicale, GEIST, Limoges, France
| | - S. Ducroix-Roubertou
- Service des maladies infectieuses et tropicales, Centre hospitalier universitaire de Limoges, Limoges, France
| | - S. Rogez
- Service de bacte?riologie, virologie, hygie?ne, Centre hospitalier universitaire de Limoges, Limoges, France
| | - D. Ajzenberg
- Université de Limoges, U1094, Neuroépidémiologie tropicale, Institut d'épidémiologie et de neurologie tropicale, GEIST, Limoges, France.,Service de parasitologie-mycologie, Centre hospitalier universitaire de Limoges, Limoges, France
| | - B. Courtioux
- Université de Limoges, U1094, Neuroépidémiologie tropicale, Institut d'épidémiologie et de neurologie tropicale, GEIST, Limoges, France
| | - J.-F. Faucher
- Université de Limoges, U1094, Neuroépidémiologie tropicale, Institut d'épidémiologie et de neurologie tropicale, GEIST, Limoges, France.,Service des maladies infectieuses et tropicales, Centre hospitalier universitaire de Limoges, Limoges, France,*
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Gardenat A, Aldebert P, Deharo J, Bonnet J, Torras O, Deharo P, Bonnet G, Habib G. Safety and efficiency of multimodal imaging approach of patent foramen ovale closure in patients with cryptogenic stroke. Archives of Cardiovascular Diseases Supplements 2021. [DOI: 10.1016/j.acvdsp.2020.10.310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Bonnet G, Pradier J, Casalta A, Jacquier A, Bonnet J. Silent thrombosis of a WATCHMAN device after Left Atrial Appendage ClosureDate from the RESET registry. Archives of Cardiovascular Diseases Supplements 2019. [DOI: 10.1016/j.acvdsp.2018.10.113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Bonnet J, Durmort C, Mortier-Barrière I, Campo N, Jacq M, Moriscot C, Straume D, Berg KH, Håvarstein L, Wong YS, Vernet T, Di Guilmi AM. Nascent teichoic acids insertion into the cell wall directs the localization and activity of the major pneumococcal autolysin LytA. ACTA ACUST UNITED AC 2018; 2:24-37. [PMID: 32743129 PMCID: PMC7389264 DOI: 10.1016/j.tcsw.2018.05.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [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: 03/23/2018] [Revised: 05/17/2018] [Accepted: 05/18/2018] [Indexed: 12/14/2022]
Abstract
Peptidoglycan which sustains bacterial growth is targeted by b-lactam antibiotics. Spread of antibiotic resistance requires the development of new antibacterial drugs. The cell wall of Gram-positive bacteria carries teichoic acids and virulence factors. Function and surface localization of virulence factors are regulated by teichoic acids. Anti-bacterial strategy should target the localization of surface virulence factors.
The bacterial cell wall is in part composed of the peptidoglycan (PG) layer that maintains the cell shape and sustains the basic cellular processes of growth and division. The cell wall of Gram-positive bacteria also carries teichoic acids (TAs). In this work, we investigated how TAs contribute to the structuration of the PG network through the modulation of PG hydrolytic enzymes in the context of the Gram-positive Streptococcus pneumoniae bacterium. Pneumococcal TAs are decorated by phosphorylcholine residues which serve as anchors for the Choline-Binding Proteins, some of them acting as PG hydrolases, like the major autolysin LytA. Their binding is non covalent and reversible, a property that allows easy manipulation of the system. In this work, we show that the release of LytA occurs independently from its amidase activity. Furthermore, LytA fused to GFP was expressed in pneumococcal cells and showed different localization patterns according to the growth phase. Importantly, we demonstrate that TAs modulate the enzymatic activity of LytA since a low level of TAs present at the cell surface triggers LytA sensitivity in growing pneumococcal cells. We previously developed a method to label nascent TAs in live cells revealing that the insertion of TAs into the cell wall occurs at the mid-cell. In conclusion, we demonstrate that nascent TAs inserted in the cell wall at the division site are the specific receptors of LytA, tuning in this way the positioning of LytA at the appropriate place at the cell surface.
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Affiliation(s)
- J Bonnet
- Institut de Biologie Structurale (IBS), Univ. Grenoble Alpes, CEA, CNRS, 38044 Grenoble, France
| | - C Durmort
- Institut de Biologie Structurale (IBS), Univ. Grenoble Alpes, CEA, CNRS, 38044 Grenoble, France
| | - I Mortier-Barrière
- Laboratoire de Microbiologie et Génétique Moléculaires, Centre de Biologie Intégrative (CBI), Centre National de la Recherche Scientifique (CNRS), Université de Toulouse, UPS, F-31000 Toulouse, France
| | - N Campo
- Laboratoire de Microbiologie et Génétique Moléculaires, Centre de Biologie Intégrative (CBI), Centre National de la Recherche Scientifique (CNRS), Université de Toulouse, UPS, F-31000 Toulouse, France
| | - M Jacq
- Institut de Biologie Structurale (IBS), Univ. Grenoble Alpes, CEA, CNRS, 38044 Grenoble, France
| | - C Moriscot
- Institut de Biologie Structurale (IBS), Univ. Grenoble Alpes, CEA, CNRS, 38044 Grenoble, France
| | - D Straume
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, P.O. Box 5003, NO-1432 Aas, Norway
| | - K H Berg
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, P.O. Box 5003, NO-1432 Aas, Norway
| | - L Håvarstein
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, P.O. Box 5003, NO-1432 Aas, Norway
| | - Y-S Wong
- Département de Pharmacochimie Moléculaire (DPM), Univ. Grenoble Alpes, UMR 5063 CNRS, ICMG FR 2607, 38 041 Grenoble, France
| | - T Vernet
- Institut de Biologie Structurale (IBS), Univ. Grenoble Alpes, CEA, CNRS, 38044 Grenoble, France
| | - A M Di Guilmi
- Institut de Biologie Structurale (IBS), Univ. Grenoble Alpes, CEA, CNRS, 38044 Grenoble, France
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Di Guilmi AM, Bonnet J, Peiβert S, Durmort C, Gallet B, Vernet T, Gisch N, Wong YS. Specific and spatial labeling of choline-containing teichoic acids in Streptococcus pneumoniae by click chemistry. Chem Commun (Camb) 2018; 53:10572-10575. [PMID: 28894874 DOI: 10.1039/c7cc05646j] [Citation(s) in RCA: 12] [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] [Indexed: 12/18/2022]
Abstract
Propargyl-choline was efficiently incorporated into teichoic acid (TA) polymers on the surface of Streptococcus pneumoniae. The introduction of a fluorophore by click chemistry enabled sufficient labeling of the pneumococcus, as well as its specific detection when mixed with other bacterial species. The labeling is localized at the septal site, suggesting a similar location of the TA and peptidoglycan (PG) synthetic machineries. This method is a unique opportunity to improve our understanding of the spatial location of pneumococcal TA biosynthesis.
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Affiliation(s)
- A M Di Guilmi
- Univ. Grenoble Alpes, CEA, CNRS, IBS, F-38000 Grenoble, France
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Bonnet G, Pradier J, Salaun E, Camus O, Cuisset T, Jacquier A, Bonnet J. Cardiac computed tomography angiography to detect residual peridevice leak after left atrial appendage occlusion with a Watchman device. Archives of Cardiovascular Diseases Supplements 2018. [DOI: 10.1016/j.acvdsp.2017.11.306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Deharo P, Quilici J, Bassez C, Bonnet G, Lambert M, Morange P, Alessi M, Fourcade L, Bonnet J, Cuisset T. Benefit of switching dual antiplatelet therapy after ACS according to platelet reactivity: A prespecified analysis of the TOPIC randomized study. Archives of Cardiovascular Diseases Supplements 2018. [DOI: 10.1016/j.acvdsp.2017.11.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Bonnet G, Pradier J, Spychaj J, Salaun E, Pankert M, Cuisset T, Bonnet J. Left atrial appendage percutaneous closure with a watchman device in patients with a contraindication to long-term oral anticoagulation. One-year follow-up. Archives of Cardiovascular Diseases Supplements 2018. [DOI: 10.1016/j.acvdsp.2017.11.288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Deharo P, Quilici J, Bassez C, Bonnet G, Lambert M, Morange P, Alessi M, Bonnet J, Cuisset T. Impact of diabetes on benefit of switching dual antiplatelet therapy after acute coronary syndrome: A subanalysis of the TOPIC randomized study. Archives of Cardiovascular Diseases Supplements 2018. [DOI: 10.1016/j.acvdsp.2017.11.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Camus O, Bonnet G, Lemoine C, Resseguier N, Massoure P, Fourcade L, Bonnet J. The amount of material retrieved by thrombus aspiration in patients referred for an Acute Coronary Syndrome is associated with their clinical and angiographic characteristics. Archives of Cardiovascular Diseases Supplements 2018. [DOI: 10.1016/j.acvdsp.2017.11.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Deharo P, Quilci J, Bassez C, Bonnet G, Lambert M, Fourcade L, Morange P, Alessi M, Bonnet J, Cuisset T. Benefit of switching dual antiplatelet therapy after acute coronary syndrome: The TOPIC (Timing Of Platelet Inhibition after acute Coronary Syndrome) randomized study. Archives of Cardiovascular Diseases Supplements 2018. [DOI: 10.1016/j.acvdsp.2017.11.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Deharo P, Quilci J, Bassez C, Bonnet G, Lambert M, Morange P, Alessi M, Fourcade L, Bonnet J, Cuisset T. Benefit of switching dual antiplatelet therapy after ACS on dual antiplatelet therapy adherence: A prespecified analysis of the TOPIC randomized study. Archives of Cardiovascular Diseases Supplements 2018. [DOI: 10.1016/j.acvdsp.2017.11.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Bonnet G, Quilici J, Lambert M, Cuisset T, Mouret J, Bonnet J. Non-HDL Cholesterol is predictive of diffusion of coronary artery disease in young patients presenting with a myocardial infarction. Archives of Cardiovascular Diseases Supplements 2018. [DOI: 10.1016/j.acvdsp.2017.11.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Bonnet J, Cartannaz J, Tourcier G, Contreras-Martel C, Kleman JP, Morlot C, Vernet T, Di Guilmi AM. Autocatalytic association of proteins by covalent bond formation: a Bio Molecular Welding toolbox derived from a bacterial adhesin. Sci Rep 2017; 7:43564. [PMID: 28252635 PMCID: PMC5333627 DOI: 10.1038/srep43564] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 01/25/2017] [Indexed: 11/26/2022] Open
Abstract
Unusual intramolecular cross-links present in adhesins from Gram-positive bacteria have been used to develop a generic process amenable to biotechnology applications. Based on the crystal structure of RrgA, the Streptococcus pneumoniae pilus adhesin, we provide evidence that two engineered protein fragments retain their ability to associate covalently with high specificity, in vivo and in vitro, once isolated from the parent protein. We determined the optimal conditions for the assembly of the complex and we solved its crystal structure at 2 Å. Furthermore, we demonstrate biotechnological applications related to antibody production, nanoassembly and cell-surface labeling based on this process we named Bio Molecular Welding.
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Affiliation(s)
- J Bonnet
- Institut de Biologie Structurale (IBS), Univ. Grenoble Alpes, CEA, CNRS, 38044 Grenoble, France
| | - J Cartannaz
- Institut de Biologie Structurale (IBS), Univ. Grenoble Alpes, CEA, CNRS, 38044 Grenoble, France
| | - G Tourcier
- Institut de Biosciences et Biotechnologies de Grenoble (BIG), Univ. Grenoble Alpes, CEA, CNRS, 38044 Grenoble, France
| | - C Contreras-Martel
- Institut de Biologie Structurale (IBS), Univ. Grenoble Alpes, CEA, CNRS, 38044 Grenoble, France
| | - J P Kleman
- Institut de Biologie Structurale (IBS), Univ. Grenoble Alpes, CEA, CNRS, 38044 Grenoble, France
| | - C Morlot
- Institut de Biologie Structurale (IBS), Univ. Grenoble Alpes, CEA, CNRS, 38044 Grenoble, France
| | - T Vernet
- Institut de Biologie Structurale (IBS), Univ. Grenoble Alpes, CEA, CNRS, 38044 Grenoble, France
| | - A M Di Guilmi
- Institut de Biologie Structurale (IBS), Univ. Grenoble Alpes, CEA, CNRS, 38044 Grenoble, France
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Bonnet G, Salaun E, Deffarges S, Pankert M, Cuisset T, Bonnet J. Measurements by CT angiography of the left atrial appendage before percutaneous closure with a watchman device. Archives of Cardiovascular Diseases Supplements 2017. [DOI: 10.1016/s1878-6480(17)30178-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Bonnet G, Salaun E, Deffarges S, Mouret J, Cuisset T, Bonnet J. Percutaneous closure of left atrial appendage with a watchman device: a single center study. Archives of Cardiovascular Diseases Supplements 2017. [DOI: 10.1016/s1878-6480(17)30212-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Bonnet G, Salaun E, Deffarges S, Cuisset T, Bonnet J. Cardiac computed tomography angiography is helpful to select patients for left atrial appendage occlusion with a watchman device. Archives of Cardiovascular Diseases Supplements 2017. [DOI: 10.1016/s1878-6480(17)30213-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Werler S, Sachse M, Grömminger S, Neder U, Bonnet J, Busche S, Hofmann W. Taking NIPT to the next level: detection of fetal trisomy 21 based on quantitative real-time PCR. Geburtshilfe Frauenheilkd 2016. [DOI: 10.1055/s-0036-1593190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Laffont MA, Sommet A, Alvarez M, Bruyand M, Bonnet J, Marchou B, Delobel P. A-10: Complications infectieuses des lymphomes liés au VIH pris en charge par une association rituximab-polychimiothérapie. Med Mal Infect 2014. [DOI: 10.1016/s0399-077x(14)70093-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Chasseriaud W, Gerbaud E, Montaudon M, Gilbert S, Cochet H, Pucheu Y, Horovitz A, Bonnet J, Douard H, Coste P. Effect of ivabradine on left ventricular remodelling after reperfused myocardial infarction: a pilot study. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.p1329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Huyghe E, Genebes C, Filleron T, Soulie M, Jonca F, Belossi P, Thoulouzan M, Delaunay B, Ducassou A, Aziza R, Bonnet J, Brun T, Delannes M, Bachaud JM. Résultats carcinologiques et fonctionnels (urinaires et digestifs) obtenus chez 748 patients consécutifs traités par implant permanent de grains d’iode125 pour un adénocarcinome prostatique. Prog Urol 2012. [DOI: 10.1016/j.purol.2012.08.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Bachaud JM, Genebes C, Filleron T, Soulie M, Jonca F, Aziza R, Bonnet J, Delannes M, Belossi P, Thoulouzan M, Delaunay B, Ducassou A, Brun T, Huyghe E. Curiethérapie prostatique par implant permanent de grains d’iode125 : comparaison de trois techniques successives d’implantation. Prog Urol 2012. [DOI: 10.1016/j.purol.2012.08.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Benchimol D, Pillois X, Oysel-Mestre M, Sagardiluz P, Bonnet J. Ankle brachial index using an automatic blood pressure device in occupational medicine: relevance in routine examination and comparison with Framingham cardio-vascular risk score. Int J Clin Pract 2012; 66:862-6. [PMID: 22897463 DOI: 10.1111/j.1742-1241.2012.02984.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
AIM The aim of this study was to assess the feasibility and relevance of determining ankle brachial index (ABI) using an automatic blood pressure device in subjects seen for their annual routine examination by occupational physicians and to compare the obtained ABI with the Framingham score. PATIENTS AND METHODS Sixteen physicians randomly recruited 634 subjects in 12 departments of occupational medicine. Subjects aged between 40 and 60 years underwent a determination of ABI using an OMRON HM 722 device and the analysis of Framingham score. Other analysed variables were: sex, age, smoking habit, hypertension, diabetes, hypercholesterolemia, glycaemia, total cholesterol, HDL and LDL cholesterol and triglycerides levels. RESULTS Mean age of the population studied was 48.1 ± 6.0 years; 73% were men, 36% were smokers, 14% had hypertension, 3.3% diabetes and 22% hypercholesterolemia. Biochemical values were glycaemia 0.90 ± 0.30 g/l, total cholesterol 2.10 ± 0.4 g/l, HDL cholesterol level 0.50 ± 0.20 g/l, LDL cholesterol level 1.30 ± 0.40 g/l, and triglycerides 1.40 ± 1.0 g/l. Mean ABI were 1.1 ± 0.1 in both legs. Mean Framingham score was 8.2 ± 5.4%. Only 20 subjects (3%) had an ABI < 0.90. No relation was found between pathological ABI and Framingham score (abnormal ABI : 9.9 ± 5.5 vs. normal ABI : 8.2 ± 5.4, NS). CONCLUSION The determination of ABI using a simple commercially available automatic blood pressure device is feasible and easy to implement by preventive or general physicians in all kinds of routine examinations. In our opinion automatic ABI very easy and quick to determine provides, in addition to Framingham score, a simple and useful tool to detect subjects at high cardio-vascular risk.
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Affiliation(s)
- D Benchimol
- Hopital Cardiologique, Avenue Magellan, 33604 Pessac, France Les Portes de Cauderan, 33000 Bordeaux, France
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Cassol E, Bonnet J, Porcheron D, Mazeron JJ, Peiffert D, Alapetite C. [Ballistic quality assurance]. Cancer Radiother 2012; 16 Suppl:S30-7. [PMID: 22632786 DOI: 10.1016/j.canrad.2011.06.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2011] [Accepted: 06/30/2011] [Indexed: 10/28/2022]
Abstract
This review describes the ballistic quality assurance for stereotactic intracranial irradiation treatments delivered with Gamma Knife® either dedicated or adapted medical linear accelerators. Specific and periodic controls should be performed in order to check the mechanical stability for both irradiation and collimation systems. If this step remains under the responsibility of the medical physicist, it should be done in agreement with the manufacturer's technical support. At this time, there are no recent published guidelines. With technological developments, both frequency and accuracy should be assessed in each institution according to the treatment mode: single versus hypofractionnated dose, circular collimator versus micro-multileaf collimators. In addition, "end-to-end" techniques are mandatory to find the origin of potential discrepancies and to estimate the global ballistic accuracy of the delivered treatment. Indeed, they include frames, non-invasive immobilization devices, localizers, multimodal imaging for delineation and in-room positioning imaging systems. The final precision that could be reasonably achieved is more or less 1mm.
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Affiliation(s)
- E Cassol
- Unité de radiophysique et de radioprotection des hôpitaux de Toulouse, Hôtel Dieu Saint-Jacques, 2 rue Viguerie,Toulouse cedex 9, France.
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Degail MA, Hughes GJ, Maule C, Holmes C, Lilley M, Pebody R, Bonnet J, Bermingham A, Bracebridge S. A human metapneumovirus outbreak at a community hospital in England, July to September 2010. Euro Surveill 2012; 17:20145. [PMID: 22516049] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023] Open
Abstract
We describe an outbreak of human metapneumovirus (hMPV) which occurred in July-September 2010 at a community hospital in the East of England. Based on the medical and nursing records, cases were retrospectively defined as suspected if they had had an influenza-like illness (ILI), and probable if they had had an ILI and an epidemiological link to a laboratory-confirmed case. Of a total of 17 symptomatic inpatients, five were classified as probable cases, five were laboratory confirmed and seven were suspected. The attack rate was 29.4% for confirmed and probable cases combined. The median age of symptomatic inpatients was 85 years-old (range 68-96) and the majority (16/17) of symptomatic inpatients had an underlying medical condition. Control measures introduced appeared to restrict further exposure of susceptible patients to infection although modelling suggested that up to four of 10 confirmed and probable cases (40%) could have been prevented through more timely diagnosis and recognition of an outbreak. These findings suggest that there should be increased awareness of hMPV infection within healthcare settings, particularly when the population at risk has a high prevalence of underlying co-morbidities.
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Affiliation(s)
- M A Degail
- Health Protection Agency, Colindale, United Kingdom
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Degail MA, Hughes GJ, Maule C, Holmes C, Lilley M, Pebody R, Bonnet J, Bermingham A, Bracebridge S. A human metapneumovirus outbreak at a community hospital in England, July to September 2010. Euro Surveill 2012. [DOI: 10.2807/ese.17.15.20145-en] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Binary file ES_Abstracts_Final_ECDC.txt matches
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Affiliation(s)
- M A Degail
- European Programme for Intervention Epidemiology Training (EPIET), European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
- Health Protection Agency, Colindale, United Kingdom
| | - G J Hughes
- Health Protection Agency East of England, Cambridge, United Kingdom
| | - C Maule
- Hertfordshire Community NHS Trust, Welwyn Garden City, United Kingdom
| | - C Holmes
- Hertfordshire Community NHS Trust, Welwyn Garden City, United Kingdom
| | - M Lilley
- Bedfordshire and Hertfordshire Health Protection Unit, Letchworth, United Kingdom
| | - R Pebody
- Health Protection Agency, Colindale, United Kingdom
| | - J Bonnet
- Hertfordshire Community NHS Trust, Welwyn Garden City, United Kingdom
| | - A Bermingham
- Health Protection Agency, Colindale, United Kingdom
| | - S Bracebridge
- Health Protection Agency East of England, Cambridge, United Kingdom
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Bonnet J, Bounor-Legaré V, Boisson F, Melis F, Camino G, Cassagnau P. Phosphorus based organic–inorganic hybrid materials prepared by reactive processing for EVA fire retardancy. Polym Degrad Stab 2012. [DOI: 10.1016/j.polymdegradstab.2012.01.018] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Velde ICT, Bonnet J, Tanke HJ, Ploem JS. Reflection contrast microscopy performed on epi-illumination microscope stands: Comparison of reflection contrast- and epi-polarization microscopy. J Microsc 2011. [DOI: 10.1111/j.1365-2818.1990.tb03014.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Kahloula K, Slimani M, Dubois M, Bonnet J. D-cycloserine enhances spatial learning performances of rats chronically exposed to lead during the developmental period. African Journal of Neurological Sciences 2010. [DOI: 10.4314/ajns.v28i1.55141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Ducassou A, David I, Bonnet J, Delannes M. Étude rétrospective du contrôle local et du résultat cosmétique de 147 carcinomes de la face après curiethérapie interstitielle. Cancer Radiother 2009. [DOI: 10.1016/j.canrad.2009.08.081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Bonnet J, Baer T, Neukomm S. Investigations on the Intermediate Metabolism of Steroid Hormones and Carcinogenic Compounds. Oncology 2009. [DOI: 10.1159/000224054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Pillois X, Do Thi NP, Reynaud A, Benchimol D, Bonnet J. Abstract: P867 HPA1 POLYMORPHISM IN APOLIPOPROTEIN C1 GENE IS ASSOCIATED WITH CORONARY ARTERY DISEASE SEVERITY. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)70988-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Benchimol D, Mazanof M, Dubroca B, Benchimol H, Bernard V, Couffinhal T, Dartigues JF, Roudaut R, Pillois X, Bonnet J. Detection of coronary stenoses by stress echocardiography using a previously implanted pacemaker for ventricular pacing: preliminary report of a new method. Clin Cardiol 2009; 23:842-8. [PMID: 11097132 PMCID: PMC6655253 DOI: 10.1002/clc.4960231111] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [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] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND The number of patients with pacemakers has been increasing and a large number of them will present with chest pain or symptoms suggesting angina pectoris. Myocardial ischemia and presence of coronary artery disease are difficult to detect and assess by noninvasive methods in patients with a pacemaker; the electrocardiogram (ECG) at rest and during exercise is usually very difficult to analyze in terms of ischemia or even presence of an acute myocardial infarction. HYPOTHESIS To detect significant coronary stenosis in patients with previously implanted pacemakers, we tested a new stress echocardiography method using incremental ventricular pacing by already implanted pacemakers. METHODS We studied prospectively 25 consecutive patients who underwent stress echocardiography with increasing ventricular pacing up to either 85% of the age-predicted maximal heart rate or chest pain. Positive tests were defined by new hypokinesia or worsening of a preexisting alteration in wall motion in at least two adjacent territories. All patients underwent coronary angiograms to define the presence and severity of coronary stenoses. RESULTS Among the 25 tests, 11 (44%) were stopped for chest pain. 1 (4%) for moderate discomfort, 1 (4%) for a drop in blood pressure, and the target pacing rate was achieved in the tests of the remaining 12 patients (48%). There were no complications. Thirteen patients had significant stenoses. In 10 cases, stress echocardiography was a true positive test with respect to coronary angiography. There were 11 true negative, 1 false positive, and 3 false negative tests. The sensitivity was 77%, specificity was 90%, the positive predictive value was 91%, and the negative predictive value 79%. The accuracy was 84%. CONCLUSIONS This new stress echocardiography method appears feasible, easy, safe, and effective for detection of significant coronary stenoses in patients with pacemakers.
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Affiliation(s)
- D Benchimol
- Service de Cardiologie et Maladies Vasculaires, Hôpital Cardiologique, Pessac, France
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Bonnet J, Blouet A, David I, Marre D, Delannes M. Quality control in pulsed dose rate brachytherapy with Ir-192 afterloading system: The use of radiochromic films. Brachytherapy 2008. [DOI: 10.1016/j.brachy.2008.02.255] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Reboul JR, Guasch C, Ferrandis JY, Bonnet J. Stepped horn actuated Kelvin probe. Rev Sci Instrum 2008; 79:025110. [PMID: 18315332 DOI: 10.1063/1.2841075] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We have developed an original Kelvin probe system using an ultrasonic stepped horn sonotrode. This actuator is optimized in order to maximize the velocity of the tip end, and hence to increase the Kelvin current detected. Such development is essential to improve surface potential measurements at small spatial scale.
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Affiliation(s)
- J-R Reboul
- IES, UMR 5214 UM2/CNRS, cc082, Université de Montpellier 2, Place E. Bataillon, F-34095 Montpellier Cedex 05, France.
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Lebrecht D, Deveaud C, Beauvoit B, Bonnet J, Kirschner J, Mueller K, Venhoff N, Walker UA. Uridine supplementation with Mitocnol antagonizes antiretroviral nucleoside analogue-induced mitochondrial peripheral and cerebral neuropathy in vivo. J Int AIDS Soc 2008. [DOI: 10.1186/1758-2652-11-s1-p148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Bachaud JM, Delannes M, Marre D, Bonnet J, Jonca F, Soulie M, Huyghe E. Évaluation delafonction éjaculatoire après curiethérapie interstitielle prostatique pargrains d'iode 125. Cancer Radiother 2007. [DOI: 10.1016/j.canrad.2007.09.104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Macgrogan G, Hostein I, Chibon F, Geneste G, Petersen M, Velasco V, De Mascarel I, Soubeyran I, Bui M, Coindre J, Parrens M, De Mascarel A, Belaud-Rotureau M, Idrissi Y, Turmot M, Merlio J, Bonnet J, Colotte M, Tuffet S. Accélération de la fixation par le micro-ondes : l’expérience bordelaise. Ann Pathol 2007. [DOI: 10.1016/s0242-6498(07)92881-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Vieillevigne L, Hangard G, Marre D, Bonnet J, Rives M, Bachaud JM. Apport d'une fonction objectif basée surladose équivalente uniforme surlesplans detraitements parmodulation d'intensité (RCMI). Cancer Radiother 2007. [DOI: 10.1016/j.canrad.2007.09.076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Bonnet J, Davignon J, McPherson R, Tedgui A, Simoneau D, Martineau P, Nozza A. PO23-785 LDL-C AND CRP IN ATORVASTATIN TREATED STABLE CORONARY ARTERY DISEASE PATIENTS: THE CAP (COMPARATIVE ATORVASTATIN PLEOTROPIC) EFFECTS STUDY RESULTS. ATHEROSCLEROSIS SUPP 2007. [DOI: 10.1016/s1567-5688(07)71795-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Almer S, Granerus G, Ström M, Olaison G, Bonnet J, Lémann M, Smedh K, Franzén L, Bertheau P, Cattan P, Rain JD, Modigliani R. Leukocyte scintigraphy compared to intraoperative small bowel enteroscopy and laparotomy findings in Crohn's disease. Inflamm Bowel Dis 2007; 13:164-74. [PMID: 17206712 DOI: 10.1002/ibd.20001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
BACKGROUND Leukocyte scintigraphy is a noninvasive investigation to assess inflammation. We evaluated the utility of labeled leukocytes to detect small bowel inflammation and disease complications in Crohn's disease and compared it to whole small bowel enteroscopy and laparotomy findings. METHODS Scintigraphy with technetium-99m exametazime-labeled leukocytes was prospectively performed in 48 patients with Crohn's disease a few days before laparotomy; 41 also had an intraoperative small bowel enteroscopy. The same procedures were performed in 8 control patients. Independent grading of scans was compared with the results of enteroscopy and with surgical, histopathologic, and clinical data. RESULTS In the 8 control patients leukocyte scan, endoscopy, and histopathology were all negative for the small bowel. In patients with Crohn's disease and small bowel inflammation seen at enteroscopy and/or laparotomy (n = 39) the scan was positive in 33. In 8 patients without macroscopic small bowel inflammation, the scan was positive for the small bowel in 3 patients; at histology, 2 of 3 had inflammation. When combining results for patients and controls, the sensitivity of leukocyte scan for macroscopically evident small bowel inflammation was 0.85, specificity 0.81, accuracy 0.84, positive predictive value 0.92, and negative predictive value 0.68. Scintigraphy detected inflammatory lesions not known before laparotomy in 16 of 47 (34%) Crohn's disease patients and showed uptake in 25 of 35 (71%) bowel strictures. It was diagnostic regarding 4 of 8 abscesses and 9 of 15 fistulas. In 6 patients (13%) lesions first demonstrated by leukocyte scintigraphy were treated during the surgery performed. CONCLUSIONS Leukocyte scintigraphy reliably detects small bowel inflammation in Crohn's disease. It gives additional information on the presence of inflammatory lesions in a fraction of patients planned for surgery.
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Affiliation(s)
- Sven Almer
- Division of Gastroenterology and Hepatology, IMK Linköpings Universitet, Linköping, Sweden.
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Pommier P, Delannes M, LeFloch O, Bernier V, Baron MH, Thomas L, Malet C, Bonnet J, Louisot P, Aletti P, Goubard O, Chemin A, Chirat F, Lebivic S, Montbarbon X, Bachaud JM, Votron L, Lasbareilles O, Desmettre O, Bringeon G, Gassa F, Peiffert D. L'expérience française de l'utilisation d'un projecteur de source pour la curiethérapie prostatique exclusive par implants permanents d'iode radioactif : faisabilité et données de toxicité aiguë. Cancer Radiother 2006; 10:559-64. [PMID: 16959520 DOI: 10.1016/j.canrad.2006.07.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2006] [Accepted: 07/12/2006] [Indexed: 10/24/2022]
Abstract
PURPOSE To analyse a new technique for prostate brachytherapy with permanent Iodine implants characterized by the use of a seed projector after a 3D dosimetric peroperative treatment planning (FIRST technique). PATIENTS AND METHOD 395 patients have been treated in France with this technique in six radiotherapy centres between November 2002 and December 2005 for a localized prostate cancer. RESULTS Thirteen patients (3.3%) developped a urinary retention, and respectively 7.8 and 26.5% an acute RTOG grade 3 and 2 toxicity. The 6-weeks IPSS score was equal or lower to 15 in 73% with a 11 median IPSS value. A failure of the loading with the seed-projector, leading to a manual loading of the seeds, occurred in 9 patients (2.3%) in two centres, directly related to the loading procedure with the seed-projector in 5 cases. The median duration of the procedure was reduced by 30 minutes for the patients treated in 2005. CONCLUSIONS This multicenter study establishes the feasibility of the routine use of a seed projector for permanent iodine 125 prostate implants with an initial tolerance similar to the best results published for other implants techniques.
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Affiliation(s)
- P Pommier
- Centre Léon-Bérard, 28, rue Laënnec, 69373 Lyon, France.
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Bianchi-Demicheli F, Perrin E, Dupanloup A, Dumont P, Bonnet J, Berthoud M, Kulier R, Bettoli L, Lorenzi-Cioldi F, Chardonnens D. Contraceptive counselling and social representations: a qualitative study. Swiss Med Wkly 2006; 136:127-34. [PMID: 16633957 DOI: 2006/07/smw-11218] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND Contraceptive use is a complex issue and several studies have been conducted in an effort to understand user behaviour. It is of interest to explore the representations of professionals who give advice on contraception, since their views could have an impact on contraceptive use. METHODS Individual in-depth interviews of 65 healthcare professionals likely to provide contraceptive advice to patients at a Swiss maternity unit. RESULTS 83% of healthcare professionals interviewed were favourable to contraception in general while being highly critical of its practical efficacy. The methods most often spontaneously cited were oral contraceptive pills, male condom, intrauterine devices and hormonal implants. Theoretically, all methods should be proposed during contraceptive counselling but in practice interviewees have different social representations of user groups and associate them with specific contraceptive methods. Personal experience appears to play a bigger role than scientific knowledge. CONCLUSIONS The counsellor's social representations probably play an important role in determining user behaviour. These representations should be taken into consideration in the training of healthcare professionals in this field.
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Affiliation(s)
- F Bianchi-Demicheli
- Psychosomatic Gynaecology and Sexology Unit, Department of Psychiatry, Geneva University Hospitals, Switzerland.
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Condat B, Asselah T, Zanditenas D, Estampes B, Cohen A, O'Toole D, Bonnet J, Ngo Y, Marcellin P, Blazquez M. Fatal cardiomyopathy associated with pegylated interferon/ribavirin in a patient with chronic hepatitis C. Eur J Gastroenterol Hepatol 2006; 18:287-9. [PMID: 16462543 DOI: 10.1097/00042737-200603000-00010] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
We report the case of a 45-year-old man with HCV treated with pegylated interferon-alpha/ribavirin, in whom fatal cardiomyopathy occurred. Cardiomyopathy is a rare complication of high dose of standard interferon but has never been reported with pegylated interferon. The relationship between pegylated interferon-alpha/ribavirin and the development of cardiomyopathy is highly probable for the following reasons: (1) a cardiologist consultation with specific investigations had been performed before treatment excluding a pre-existing cardiomyopathy; (2) symptoms of advanced dilated cardiomyopathy appeared immediately after the end of treatment; (3) other causes of cardiomyopathy have been ruled out. In all except one of the 21 reported cases with standard interferon, cardiomyopathy was reversible. In our patient, fatal cardiomyopathy occurred with a usual dose of pegylated interferon-alpha. Clinicians should be aware of this potential complication when evaluating the ratio benefit/risk of treatment in patients with chronic hepatitis C infection.
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Affiliation(s)
- Bertrand Condat
- Service d'hépato-gastroentérologie, Hôpital Saint-Camille, Bry sur Marne, France.
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