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Canivet CM, Faure S. [Diagnosis and evaluation of metabolic dysfunction associated steatotic liver disease (MASLD)]. Rev Med Interne 2024; 45:41-47. [PMID: 38158295 DOI: 10.1016/j.revmed.2023.10.438] [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: 08/18/2022] [Accepted: 10/12/2023] [Indexed: 01/03/2024]
Abstract
Non-alcoholic fatty liver disease (NAFLD) or recently called Metabolic Dysfunction Associated Steatotic Liver Disease (MASLD), is the leading cause of liver disease, with an estimated worldwide prevalence of 25%. MASLD is suspected, in a metabolic condition, in the presence of hepatic steatosis, moderate hepatic cytolysis or hyperferritinemia. The severity of the disease depends on the stage of liver fibrosis, which can be suspected in clinical practice by simple blood tests such as the FIB-4 or NAFLD fibrosis Score. The treatment is based on lifestyle intervention combining weight loss, increased physical activity and a Mediterranean-style diet. Only a small minority of patients with MASLD will develop advanced liver disease and require liver specialist. Given the high prevalence of MASLD, the identification of these patients cannot be envisaged without the taking part in the screening of all physicians (general practitioners and specialists).
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Affiliation(s)
- C M Canivet
- Service d'hépato-gastroentérologie et oncologie digestive, CHU d'Angers, Angers, France; Laboratoire HIFIH, UPRES EA3859, SFR 4208, université d'Angers, Angers, France
| | - S Faure
- Service d'hépato-gastroentérologie et oncologie digestive, CHU de Montpellier, Montpellier, France.
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2
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Champeaux JP, Moretto-Capelle P, Renoud J, Polizzi L, Faure S, Castex D, Gianesin M, Panader E, Paquier P, Volondat W, Salbaing T, Riffaud J, Point R, Cafarelli P, Sence M. Electron-induced ionization and cationic fragmentations of the isolated molecule of 2,4-imidazolidinedione (hydantoin): a study of the relaxing path thresholds. Phys Chem Chem Phys 2023. [PMID: 37249475 DOI: 10.1039/d2cp04143j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In this work, our new experimental setup has been used to study the ionization and fragmentation of a prebiotic molecule, hydantoin, by electron impact. Scanning of the incident electron energy allows the determination of the appearance thresholds of the cations. The vertical ionization potential was found to be in good agreement with previous data. Dissociation thresholds for the main fragmentation patterns were also measured. In parallel, thanks to quantum chemical calculations, reaction schemes compatible with the experimental results are given.
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Affiliation(s)
- J-P Champeaux
- Laboratoire Collisions Agregats et reactivité, UMR 5589-CNRS Université Paul Sabatier Toulouse III, 118 Route de Narbonne, 31062 TOULOUSE Cedex 9, France.
| | - P Moretto-Capelle
- Laboratoire Collisions Agregats et reactivité, UMR 5589-CNRS Université Paul Sabatier Toulouse III, 118 Route de Narbonne, 31062 TOULOUSE Cedex 9, France.
| | - J Renoud
- Laboratoire Collisions Agregats et reactivité, UMR 5589-CNRS Université Paul Sabatier Toulouse III, 118 Route de Narbonne, 31062 TOULOUSE Cedex 9, France.
| | - L Polizzi
- Laboratoire Collisions Agregats et reactivité, UMR 5589-CNRS Université Paul Sabatier Toulouse III, 118 Route de Narbonne, 31062 TOULOUSE Cedex 9, France.
| | - S Faure
- Laboratoire Collisions Agregats et reactivité, UMR 5589-CNRS Université Paul Sabatier Toulouse III, 118 Route de Narbonne, 31062 TOULOUSE Cedex 9, France.
| | - D Castex
- Laboratoire Collisions Agregats et reactivité, UMR 5589-CNRS Université Paul Sabatier Toulouse III, 118 Route de Narbonne, 31062 TOULOUSE Cedex 9, France.
| | - M Gianesin
- Laboratoire Collisions Agregats et reactivité, UMR 5589-CNRS Université Paul Sabatier Toulouse III, 118 Route de Narbonne, 31062 TOULOUSE Cedex 9, France.
| | - E Panader
- Laboratoire Collisions Agregats et reactivité, UMR 5589-CNRS Université Paul Sabatier Toulouse III, 118 Route de Narbonne, 31062 TOULOUSE Cedex 9, France.
| | - P Paquier
- Laboratoire Collisions Agregats et reactivité, UMR 5589-CNRS Université Paul Sabatier Toulouse III, 118 Route de Narbonne, 31062 TOULOUSE Cedex 9, France.
| | - W Volondat
- Laboratoire Collisions Agregats et reactivité, UMR 5589-CNRS Université Paul Sabatier Toulouse III, 118 Route de Narbonne, 31062 TOULOUSE Cedex 9, France.
| | - T Salbaing
- Hospices Civils de Lyon, Service de Radiothérapie-Oncologie, 165 chemin du grand revoyet, 69495 PIERRE BENITE cedex, France
| | - J Riffaud
- CEA, DAM, DIF, F-91297 ARPAJON, France
| | - R Point
- Laboratoire Collisions Agregats et reactivité, UMR 5589-CNRS Université Paul Sabatier Toulouse III, 118 Route de Narbonne, 31062 TOULOUSE Cedex 9, France.
| | - P Cafarelli
- Laboratoire Collisions Agregats et reactivité, UMR 5589-CNRS Université Paul Sabatier Toulouse III, 118 Route de Narbonne, 31062 TOULOUSE Cedex 9, France.
| | - M Sence
- Laboratoire Collisions Agregats et reactivité, UMR 5589-CNRS Université Paul Sabatier Toulouse III, 118 Route de Narbonne, 31062 TOULOUSE Cedex 9, France.
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3
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Hountondji L, Palassin P, Faure S, Iltache S, Dupuy M, Pageaux G, Faillie J, Lesage C, Negre E, Assenat E, Rullier P, Rivet V, Quantin X, Meunier L, Maria A. Hépatites auto-immunes induites par inhibiteurs de checkpoints : étude observationnelle CHILI. Rev Med Interne 2022. [DOI: 10.1016/j.revmed.2022.03.256] [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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Rivet V, Quantin X, Faillie J, Lesage C, Meunier L, Faure S, Hillaire-Buys D, Lesouder C, Fabre S, Assenat E, Rullier P, Guilpain P, Maria A. Gestion des toxicités induites par les inhibiteurs de checkpoint immunologique : données de la RCP « ToxImmun » en Occitanie Est. Rev Med Interne 2021. [DOI: 10.1016/j.revmed.2021.03.241] [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: 10/21/2022]
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Mille N, Faure S, Estrader M, Yi D, Marbaix J, De Masi D, Soulantica K, Millán A, Chaudret B, Carrey J. A setup to measure the temperature-dependent heating power of magnetically heated nanoparticles up to high temperature. Rev Sci Instrum 2021; 92:054905. [PMID: 34243261 DOI: 10.1063/5.0038912] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 05/03/2021] [Indexed: 06/13/2023]
Abstract
Magnetic heating, namely, the use of heat released by magnetic nanoparticles (MNPs) excited with a high-frequency magnetic field, has so far been mainly used for biological applications. More recently, it has been shown that this heat can be used to catalyze chemical reactions, some of them occurring at temperatures up to 700 °C. The full exploitation of MNP heating properties requires the knowledge of the temperature dependence of their heating power up to high temperatures. Here, a setup to perform such measurements is described based on the use of a pyrometer for high-temperature measurements and on a protocol based on the acquisition of cooling curves, which allows us to take into account calorimeter losses. We demonstrate that the setup permits to perform measurements under a controlled atmosphere on solid state samples up to 550 °C. It should in principle be able to perform measurements up to 900 °C. The method, uncertainties, and possible artifacts are described and analyzed in detail. The influence on losses of putting under vacuum different parts of the calorimeter is measured. To illustrate the setup possibilities, the temperature dependence of heating power is measured on four samples displaying very different behaviors. Their heating power increases or decreases with temperature, displaying temperature sensibilities ranging from -2.5 to +4.4% K-1. This setup is useful to characterize the MNPs for magnetically heated catalysis applications and to produce data that will be used to test models permitting to predict the temperature dependence of MNP heating power.
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Affiliation(s)
- N Mille
- Laboratoire de Physique et Chimie des Nano-Objets (LPNCO), UMR 5215 Université de Toulouse-INSA-CNRS-UPS, 135 av. de Rangueil, 31077 Toulouse Cedex, France
| | - S Faure
- Laboratoire de Physique et Chimie des Nano-Objets (LPNCO), UMR 5215 Université de Toulouse-INSA-CNRS-UPS, 135 av. de Rangueil, 31077 Toulouse Cedex, France
| | - M Estrader
- Laboratoire de Physique et Chimie des Nano-Objets (LPNCO), UMR 5215 Université de Toulouse-INSA-CNRS-UPS, 135 av. de Rangueil, 31077 Toulouse Cedex, France
| | - D Yi
- Laboratoire de Physique et Chimie des Nano-Objets (LPNCO), UMR 5215 Université de Toulouse-INSA-CNRS-UPS, 135 av. de Rangueil, 31077 Toulouse Cedex, France
| | - J Marbaix
- Laboratoire de Physique et Chimie des Nano-Objets (LPNCO), UMR 5215 Université de Toulouse-INSA-CNRS-UPS, 135 av. de Rangueil, 31077 Toulouse Cedex, France
| | - D De Masi
- Laboratoire de Physique et Chimie des Nano-Objets (LPNCO), UMR 5215 Université de Toulouse-INSA-CNRS-UPS, 135 av. de Rangueil, 31077 Toulouse Cedex, France
| | - K Soulantica
- Laboratoire de Physique et Chimie des Nano-Objets (LPNCO), UMR 5215 Université de Toulouse-INSA-CNRS-UPS, 135 av. de Rangueil, 31077 Toulouse Cedex, France
| | - A Millán
- Instituto de Ciencia de Materiales de Aragón, Facultad de Ciencias, C/ Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - B Chaudret
- Laboratoire de Physique et Chimie des Nano-Objets (LPNCO), UMR 5215 Université de Toulouse-INSA-CNRS-UPS, 135 av. de Rangueil, 31077 Toulouse Cedex, France
| | - J Carrey
- Laboratoire de Physique et Chimie des Nano-Objets (LPNCO), UMR 5215 Université de Toulouse-INSA-CNRS-UPS, 135 av. de Rangueil, 31077 Toulouse Cedex, France
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Rivet V, Quantin X, Faillie JL, Lesage C, Meunier L, Faure S, Hillaire-Buys D, Lesouder C, Fabre S, Assenat E, Rullier P, Guilpain P, Maria ATJ. [Management of immune-related toxicities associated with immune checkpoints inhibitors: Data from the multidisciplinary meeting « ToxImmun » in Eastern Occitania]. Rev Med Interne 2021; 42:310-319. [PMID: 33485701 DOI: 10.1016/j.revmed.2021.01.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Revised: 12/06/2020] [Accepted: 01/01/2021] [Indexed: 10/22/2022]
Abstract
Immune checkpoint inhibitors (ICIs) can cause numerous and complex immune-related adverse events whose management need a multidisciplinary approach. Herein, we investigated 114 requests, mostly concerning patients suffering from lung cancer, that were submitted to the « ToxImmun » multidisciplinary meeting in Eastern Occitania between December the 17th 2018 and January the 20th 2020. The leading reasons for the request concerned the putative causal link between immunotherapy and immune-toxicity and its management, followed by possible retreatment after temporary withdrawn because of adverse event, and finally the possibility to initiate ICIs in patients with pre-existing autoimmunity. Colitis, hepatitis and myocarditis were the most frequent immune-related adverse events (IRAEs), both all grade and grade 3-4. Sicca syndrome (with or without Sjogren criteria) was also frequent (26% of cases) and seems to be associated with severe toxicity and multi-toxicity. The mean time to first IRAE was 3.8 months, a time shortened with the use of anti-PD-L1 agents or ICI combination. A majority of requests came from initial evaluation by the internist confirming the early and main role of this specialty in the management of immunotoxicity. Expansion of this regional multidisciplinary meeting, coordinated by internists and medical oncologists, could improve management of immune-related adverse events for the patients' benefits.
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Affiliation(s)
- V Rivet
- Service de médecine interne : maladies multi-organiques de l'adulte, hôpital Saint-Éloi, CHRU de Montpellier, 80, avenue Augustin-Fliche, 34295 Montpellier cedex 5, France; Faculté de médecine, université de Montpellier, Montpellier, France
| | - X Quantin
- Faculté de médecine, université de Montpellier, Montpellier, France; Service d'oncologie médicale-oncologie thoracique, institut du cancer de Montpellier, Val d'Aurelle, Montpellier, France
| | - J L Faillie
- Faculté de médecine, université de Montpellier, Montpellier, France; Département de pharmacologie médicale et toxicologie, centre régional de pharmacovigilance, hôpital Lapeyronie, CHRU de Montpellier, Montpellier, France
| | - C Lesage
- Service de dermatologie clinique, hôpital Saint-Éloi, CHRU de Montpellier, Montpellier, France
| | - L Meunier
- Faculté de médecine, université de Montpellier, Montpellier, France; Service d'hépato-gastro-entérologie, hôpital Saint-Éloi, CHRU de Montpellier, Montpellier, France
| | - S Faure
- Service d'hépato-gastro-entérologie, hôpital Saint-Éloi, CHRU de Montpellier, Montpellier, France
| | - D Hillaire-Buys
- Faculté de médecine, université de Montpellier, Montpellier, France; Département de pharmacologie médicale et toxicologie, centre régional de pharmacovigilance, hôpital Lapeyronie, CHRU de Montpellier, Montpellier, France
| | - C Lesouder
- Département de pharmacologie médicale et toxicologie, centre régional de pharmacovigilance, hôpital Lapeyronie, CHRU de Montpellier, Montpellier, France
| | - S Fabre
- Service de médecine interne, clinique Beau-Soleil, Montpellier, France
| | - E Assenat
- Faculté de médecine, université de Montpellier, Montpellier, France; Service d'oncologie médicale, hôpital Saint-Éloi, CHRU de Montpellier, Montpellier, France
| | - P Rullier
- Service de médecine interne : maladies multi-organiques de l'adulte, hôpital Saint-Éloi, CHRU de Montpellier, 80, avenue Augustin-Fliche, 34295 Montpellier cedex 5, France
| | - P Guilpain
- Service de médecine interne : maladies multi-organiques de l'adulte, hôpital Saint-Éloi, CHRU de Montpellier, 80, avenue Augustin-Fliche, 34295 Montpellier cedex 5, France; Faculté de médecine, université de Montpellier, Montpellier, France; IRMB Institute for regenerative medicine and biotherapy, Inserm U1183, hôpital Saint-Éloi, Montpellier, France
| | - A T J Maria
- Service de médecine interne : maladies multi-organiques de l'adulte, hôpital Saint-Éloi, CHRU de Montpellier, 80, avenue Augustin-Fliche, 34295 Montpellier cedex 5, France; Faculté de médecine, université de Montpellier, Montpellier, France; IRMB Institute for regenerative medicine and biotherapy, Inserm U1183, hôpital Saint-Éloi, Montpellier, France.
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Faure S, Guédon G, Drubay PA. WITHDRAWN : Évaluation de l’impact des bilans partagés de médication en officine via la plateforme Observia sur l’observance des patients. Rev Epidemiol Sante Publique 2020; 68 Suppl 2:S72-S73. [DOI: 10.1016/j.respe.2020.04.022] [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] Open
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Seguin A, Lefebvre-Lepot A, Faure S, Gondret P. Clustering and flow around a sphere moving into a grain cloud. Eur Phys J E Soft Matter 2016; 39:63. [PMID: 27339702 DOI: 10.1140/epje/i2016-16063-0] [Citation(s) in RCA: 8] [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] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Accepted: 06/02/2016] [Indexed: 06/06/2023]
Abstract
A bidimensional simulation of a sphere moving at constant velocity into a cloud of smaller spherical grains far from any boundaries and without gravity is presented with a non-smooth contact dynamics method. A dense granular "cluster" zone builds progressively around the moving sphere until a stationary regime appears with a constant upstream cluster size. The key point is that the upstream cluster size increases with the initial solid fraction [Formula: see text] but the cluster packing fraction takes an about constant value independent of [Formula: see text]. Although the upstream cluster size around the moving sphere diverges when [Formula: see text] approaches a critical value, the drag force exerted by the grains on the sphere does not. The detailed analysis of the local strain rate and local stress fields made in the non-parallel granular flow inside the cluster allows us to extract the local invariants of the two tensors: dilation rate, shear rate, pressure and shear stress. Despite different spatial variations of these invariants, the local friction coefficient μ appears to depend only on the local inertial number I as well as the local solid fraction, which means that a local rheology does exist in the present non-parallel flow. The key point is that the spatial variations of I inside the cluster do not depend on the sphere velocity and explore only a small range around the value one.
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Affiliation(s)
- A Seguin
- Laboratoire FAST, Université Paris-Sud, CNRS, Université Paris-Saclay, F-91405, Orsay, France.
- SPEC, CEA, CNRS, Université Paris-Saclay, F-91191, Gif-sur-Yvette, France.
| | - A Lefebvre-Lepot
- CMAP, CNRS, Ecole Polytechnique, Université Paris-Saclay, F-91128, Palaiseau, France
| | - S Faure
- LMO, CNRS, Université Paris-Sud, Université Paris-Saclay, F-91405, Orsay, France
| | - P Gondret
- Laboratoire FAST, Université Paris-Sud, CNRS, Université Paris-Saclay, F-91405, Orsay, France
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De Santis E, Edwards AA, Alexander BD, Holder SJ, Biesse-Martin AS, Nielsen BV, Mistry D, Waters L, Siligardi G, Hussain R, Faure S, Taillefumier C. Selective complexation of divalent cations by a cyclic α,β-peptoid hexamer: a spectroscopic and computational study. Org Biomol Chem 2016; 14:11371-11380. [DOI: 10.1039/c6ob01954d] [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] [Indexed: 01/07/2023]
Abstract
The first report on metal binding ability of a cyclic α,β-peptoid hexamer towards a selection of metal cations is presented.
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Affiliation(s)
- E. De Santis
- Medway School of Pharmacy
- Universities of Kent and Greenwich at Medway
- Chatham Maritime
- UK
| | - A. A. Edwards
- Medway School of Pharmacy
- Universities of Kent and Greenwich at Medway
- Chatham Maritime
- UK
| | | | - S. J. Holder
- Functional Materials Group
- School of Physical Sciences
- University of Kent
- Canterbury
- UK
| | - A.-S. Biesse-Martin
- Université Clermont Auvergne
- Université Blaise Pascal
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
| | - B. V. Nielsen
- School of Science
- University of Greenwich
- Chatham Maritime
- UK
| | - D. Mistry
- Division of Pharmacy and Pharmaceutical Sciences
- University of Huddersfield
- Huddersfield
- UK
| | - L. Waters
- Division of Pharmacy and Pharmaceutical Sciences
- University of Huddersfield
- Huddersfield
- UK
| | | | | | - S. Faure
- Université Clermont Auvergne
- Université Blaise Pascal
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
| | - C. Taillefumier
- Université Clermont Auvergne
- Université Blaise Pascal
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
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Angelici G, Bhattacharjee N, Roy O, Faure S, Didierjean C, Jouffret L, Jolibois F, Perrin L, Taillefumier C. Correction: Weak backbone CH⋯OC and side chain tBu⋯tBu London interactions help promote helix folding of achiral NtBu peptoids. Chem Commun (Camb) 2016; 52:6625. [DOI: 10.1039/c6cc90163h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Correction for ‘Weak backbone CH⋯OC and side chain tBu⋯tBu London interactions help promote helix folding of achiral NtBu peptoids’ by G. Angelici et al., Chem. Commun., 2016, 52, 4573–4576.
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Affiliation(s)
- G. Angelici
- Université Clermont Auvergne
- Université Blaise Pascal
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
| | | | - O. Roy
- Université Clermont Auvergne
- Université Blaise Pascal
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
| | - S. Faure
- Université Clermont Auvergne
- Université Blaise Pascal
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
| | - C. Didierjean
- LCM3B
- Université de Lorraine
- UMR CNRS 7036 CRM2
- F-54506 Vandoeuvre-lès-Nancy
- France
| | - L. Jouffret
- Université Clermont Auvergne
- Université Blaise Pascal
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
| | - F. Jolibois
- Université de Toulouse-INSA-UPS
- LPCNO
- CNRS UMR 5215
- Toulouse
- France
| | - L. Perrin
- ICBMS UMR 5246
- Université de Lyon
- 69622 Villeurbanne cedex
- France
| | - C. Taillefumier
- Université Clermont Auvergne
- Université Blaise Pascal
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
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Angelici G, Bhattacharjee N, Roy O, Faure S, Didierjean C, Jouffret L, Jolibois F, Perrin L, Taillefumier C. Weak backbone CH⋯OC and side chain tBu⋯tBu London interactions help promote helix folding of achiral NtBu peptoids. Chem Commun (Camb) 2016; 52:4573-6. [DOI: 10.1039/c6cc00375c] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The synthesis and helix folding propensity of achiral all-cis amide (NtBu)-glycine oligomers is reported.
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Affiliation(s)
- G. Angelici
- Université Clermont Auvergne
- Université Blaise Pascal
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
| | | | - O. Roy
- Université Clermont Auvergne
- Université Blaise Pascal
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
| | - S. Faure
- Université Clermont Auvergne
- Université Blaise Pascal
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
| | - C. Didierjean
- LCM3B
- Université de Lorraine
- UMR CNRS 7036 CRM2
- F-54506 Vandoeuvre-lès-Nancy
- France
| | - L. Jouffret
- Université Clermont Auvergne
- Université Blaise Pascal
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
| | - F. Jolibois
- Université de Toulouse-INSA-UPS
- LPCNO
- CNRS UMR 5215
- Toulouse
- France
| | - L. Perrin
- ICBMS UMR 5246
- Université de Lyon
- Bât. Curien
- 69622 Villeurbanne cedex
- France
| | - C. Taillefumier
- Université Clermont Auvergne
- Université Blaise Pascal
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
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Breuil V, Fontas E, Chapurlat R, Panaia-Ferrari P, Yahia HB, Faure S, Euller-Ziegler L, Amri EZ, Szulc P. Oxytocin and bone status in men: analysis of the MINOS cohort. Osteoporos Int 2015; 26:2877-82. [PMID: 26109496 DOI: 10.1007/s00198-015-3201-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [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: 04/09/2015] [Accepted: 06/08/2015] [Indexed: 11/26/2022]
Abstract
UNLABELLED Oxytocin, a neurohypophysial hormone, regulates bone metabolism in animal studies and postmenopausal women. In men, oxytocin is not associated with bone mineral density, bone turnover markers, or prevalent fractures, but weakly negatively with incident fragility fracture requiring further studies. INTRODUCTION We previously showed that serum oxytocin (OT) level is associated with bone mineral density (BMD) and bone turnover rate in postmenopausal women. The aim of our study was to assess the relationship between circulating OT levels and bone status in men. METHODS In 552 men aged 50 and older from the MINOS cohort, we measured serum levels of OT. We assessed the association of serum OT levels with BMD (lumbar, femoral neck, total hip), bone turnover markers (BTM) (serum N-terminal propeptide of type I procollagen (PINP), bone-specific alkaline phosphatase (bone ALP), and C-terminal telopeptide of type I collagen (CTX-I)) and fracture risk. RESULTS In the univariate analysis, serum OT level was not associated with BMD at any site, BTM levels, or with prevalent or incident fracture. OT was significantly correlated with body mass index (BMI) (r = 0.17, p < 0.001), total or bioavalaible 17β-estradiol (r = 0.09, p = 0.04 and r = 0.20, p < 0.001, respectively), free testosterone (r = 0.17, p < 0.001), and leptin (r = 0.16, p < 0.001). Multivariate analysis did not show significant relationship between serum OT and BMD. After adjustment for age, BMI, interaction BMI/age, history of fall in the last year, and BMD, OT and prevalent fracture were not associated. By contrast, the same analysis with additional adjustment for prevalent fracture showed a weakly significant negative association between OT and incident fracture, e.g., after adjustment for femoral neck BMD, HR = 0.73, 95 %CI 0.55-0.99, p = 0.04. CONCLUSION In men, serum OT levels are not associated with BMD, bone turnover rate, or prevalent fractures. The weak negative relationship with fracture risk requires further studies.
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Affiliation(s)
- V Breuil
- Nice University Hospital, Pasteur Hospital, Department of Rheumatology, Nice, F-06003, France.
- UMR E-4320 MATOs CEA/iBEB/SBTN, Université Nice Sophia Antipolis, Faculté de Médecine, Nice, France.
| | - E Fontas
- Nice University Hospital, Cimiez Hospital, Department of Clinical Research, Nice, F-06003, France
| | - R Chapurlat
- INSERM UMR 1033, University of Lyon, Hospices Civils de Lyon, Lyon, France
| | - P Panaia-Ferrari
- Nice University Hospital, Saint Roch Hospital, Department of Hormonology, Nice, F-06003, France
| | - H B Yahia
- Nice University Hospital, Saint Roch Hospital, Department of Hormonology, Nice, F-06003, France
- CNRS, iBV UMR 7277, 06100, Nice, France
- Inserm, iBV, U1091, 06100, Nice, France
| | - S Faure
- Nice University Hospital, Saint Roch Hospital, Department of Hormonology, Nice, F-06003, France
| | - L Euller-Ziegler
- Nice University Hospital, Pasteur Hospital, Department of Rheumatology, Nice, F-06003, France
| | - E Z Amri
- CNRS, iBV UMR 7277, 06100, Nice, France
- Inserm, iBV, U1091, 06100, Nice, France
| | - P Szulc
- INSERM UMR 1033, University of Lyon, Hospices Civils de Lyon, Lyon, France
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Lefebvre A, Laporte S, Faure S, Tiv M, Chavanet P, Belpois-Duchamp C, Astruc K, Aho-Glélé LS. Information concerning multidrug-resistant bacterial colonization or infection in the medical transfer letter. Med Mal Infect 2015; 45:286-92. [PMID: 26123765 DOI: 10.1016/j.medmal.2015.05.008] [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] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Revised: 04/07/2015] [Accepted: 05/22/2015] [Indexed: 11/19/2022]
Abstract
OBJECTIVES The aim of this study was to evaluate the proportion of transfer letters that contained information relative to infection or colonization by multidrug-resistant (MDR) bacteria and factors associated with the presence of that information. PATIENTS AND METHODS Patients for whom at least one of these selected MDR bacteria (methicillin-resistant Staphylococcus aureus, extended-spectrum β-lactamase-producing Enterobacteriaceae, or MDR Pseudomonas aeruginosa) was isolated during their hospitalization and who were transferred to another health care facility between 2009 and 2012 were included. Information of the MDR bacterium and the mention of isolation precautions were evaluated in the electronic medical record. RESULTS Information (mention of MDR bacterium or isolation precaution) was present in 57% [52; 65] of records. Full information (genus and species, concept of MDR bacterium and mention of isolation precaution) was found in 20% [16; 25]. The presence of a dedicated item in the standard medical discharge letter was associated with more frequent information. Less information was retrieved with P. aeruginosa cases than with the other 2 MDR bacteria. CONCLUSION The presence of the information has improved, but it is still insufficiently reported. Measures to improve information are needed. Indeed, information on MDR bacterial colonization or infection is the first step for isolation precautions. An item could be added to all standard medical discharge letters. An item could also be added to the indicators used to assess quality and safety in healthcare facilities.
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Affiliation(s)
- A Lefebvre
- Infection control unit, Dijon University Hospital, 21800 Dijon, France.
| | - S Laporte
- Infection control unit, Dijon University Hospital, 21800 Dijon, France
| | - S Faure
- Infection control unit, Dijon University Hospital, 21800 Dijon, France
| | - M Tiv
- Infection control unit, Dijon University Hospital, 21800 Dijon, France
| | - P Chavanet
- Department of infectious diseases, Dijon University Hospital, 21800 Dijon, France
| | - C Belpois-Duchamp
- Infection control unit, Dijon University Hospital, 21800 Dijon, France
| | - K Astruc
- Infection control unit, Dijon University Hospital, 21800 Dijon, France
| | - L S Aho-Glélé
- Infection control unit, Dijon University Hospital, 21800 Dijon, France
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Carenco C, Assenat E, Faure S, Duny Y, Danan G, Bismuth M, Herrero A, Jung B, Ursic-Bedoya J, Jaber S, Larrey D, Navarro F, Pageaux GP. Tacrolimus and the risk of solid cancers after liver transplant: a dose effect relationship. Am J Transplant 2015; 15:678-86. [PMID: 25648361 DOI: 10.1111/ajt.13018] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [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: 06/05/2014] [Revised: 09/11/2014] [Accepted: 09/12/2014] [Indexed: 01/25/2023]
Abstract
Although increased rates of solid organ cancers have been reported following liver transplantation (LT), the impact of quantitative exposure to calcineurin inhibitors (CNI) remains unclear. We have therefore probed the relationship between the development of solid organ cancers following LT and the level of CNI exposure. This prospective single-center study was conducted between 1995 and 2008 and is based on 247 tacrolimus-treated liver transplant recipients who survived at least 1 year following surgery. The incidence of cancer was recorded, and the mean blood concentration of tacrolimus (TC) was determined at 1 and 3 years following LT. The study results indicate that 43 (17.4%) patients developed de novo solid cancers. Mean TC during the first year after LT was significantly higher in patients who developed solid organ tumors (10.3 ± 2.1 vs. 7.9 ± 1.9 ng/mL, p < 0.0001). Independent risks factors in multivariate analysis were tobacco consumption before LT (OR = 5.42; 95% CI [1.93-15.2], p = 0.0014) and mean annual TC during the first year after LT (p < 0.0001; OR = 2.01; 95% CI [1.57-2.59], p < 0.0001). Similar effects were observed in 216 patients who received tacrolimus continuously for ≥3 years. It appears therefore that CNI should be used with caution after LT, and that new immunosuppressive therapies could deliver significant clinical benefits in this regard.
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Affiliation(s)
- C Carenco
- Liver Transplantation Unit, Digestive Department, Saint Eloi University Hospital, University of Montpellier I, Montpellier, France
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15
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Caumes C, Gillon E, Legeret B, Taillefumier C, Imberty A, Faure S. Multivalent thioglycopeptoids via photoclick chemistry: potent affinities towards LecA and BC2L-A lectins. Chem Commun (Camb) 2015; 51:12301-4. [DOI: 10.1039/c5cc04646g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The straightforward access to peptoid-based multivalent thioglycoclusters displaying 1-thio-β-d-galactose or 1-thio-α/β-d-mannose and their evaluation towards two bacterial lectins are described.
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Affiliation(s)
- C. Caumes
- Université Clermont Auvergne
- Université Blaise Pascal
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
| | - E. Gillon
- CERMAV
- UPR5301
- CNRS and Université Grenoble Alpes
- 38041 Grenoble
- France
| | - B. Legeret
- Université Clermont Auvergne
- Université Blaise Pascal
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
| | - C. Taillefumier
- Université Clermont Auvergne
- Université Blaise Pascal
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
| | - A. Imberty
- CERMAV
- UPR5301
- CNRS and Université Grenoble Alpes
- 38041 Grenoble
- France
| | - S. Faure
- Université Clermont Auvergne
- Université Blaise Pascal
- Institut de Chimie de Clermont-Ferrand
- F-63000 Clermont-Ferrand
- France
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Rey T, Le Cam JB, Chagnon G, Favier D, Rebouah M, Razan F, Robin E, Didier P, Heller L, Faure S, Janouchova K. An original architectured NiTi silicone rubber structure for biomedical applications. Mater Sci Eng C Mater Biol Appl 2014; 45:184-90. [PMID: 25491818 DOI: 10.1016/j.msec.2014.08.062] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Revised: 07/30/2014] [Accepted: 08/29/2014] [Indexed: 11/16/2022]
Abstract
This paper deals with composite structures for biomedical applications. For this purpose, an architectured tubular structure composed of Nickel Titanium (NiTi) Shape Memory Alloy (SMA) and silicone rubber was fabricated. One of the main interests of such structures is to ensure a good adhesion between its two constitutive materials. A previous study of the authors (Rey et al., 2014) has shown that the adhesion between NiTi and silicone rubber can be improved by an adhesion promoter or plasma treatment. However, adhesion promoters are often not biocompatible. Hence, plasma treatment is favored to be used in the present study. Three different gases were tested; air, argon and oxygen. The effects of these treatments on the maximum force required to pull-out a NiTi wire from the silicone rubber matrix were investigated by means of pull-out tests carried out with a self-developed device. Among the three gases, a higher maximum force was obtained for argon gas in the plasma treatment. A tube shaped architectured NiTi/silicone rubber structure was then produced using this treatment. The composite was tested by means of a bulge test. Results open a new way of investigations for architectured NiTi-silicone structures for biomechanical applications.
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Affiliation(s)
- T Rey
- Université de Grenoble, CNRS, TIMC-IMAG, UMR 5525, Grenoble, France
| | - J-B Le Cam
- Université de Rennes 1, Institut de Physique de Rennes, UMR 6251, CNRS/Université de Rennes 1, Campus de Beaulieu, 35042 Rennes, France.
| | - G Chagnon
- Université de Grenoble, CNRS, TIMC-IMAG, UMR 5525, Grenoble, France
| | - D Favier
- Université de Grenoble, CNRS, TIMC-IMAG, UMR 5525, Grenoble, France
| | - M Rebouah
- Université de Grenoble, CNRS, TIMC-IMAG, UMR 5525, Grenoble, France
| | - F Razan
- ENS Rennes, SATIE, CNRS 8029, Campus de Ker Lann, 35170 Bruz, France
| | - E Robin
- Université de Rennes 1, Institut de Physique de Rennes, UMR 6251, CNRS/Université de Rennes 1, Campus de Beaulieu, 35042 Rennes, France
| | - P Didier
- ENS Rennes, SATIE, CNRS 8029, Campus de Ker Lann, 35170 Bruz, France
| | - L Heller
- Institute of Physics ASCR, v.v.i., Na Slovance 2, CZ-182 00 Prague 8, Czech Republic
| | - S Faure
- ENS Rennes, SATIE, CNRS 8029, Campus de Ker Lann, 35170 Bruz, France
| | - K Janouchova
- Institute of Physics ASCR, v.v.i., Na Slovance 2, CZ-182 00 Prague 8, Czech Republic
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Elchinger PH, Delattre C, Faure S, Roy O, Badel S, Bernardi T, Taillefumier C, Michaud P. Effect of proteases against biofilms of Staphylococcus aureus and Staphylococcus epidermidis. Lett Appl Microbiol 2014; 59:507-13. [PMID: 25041576 DOI: 10.1111/lam.12305] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [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: 04/14/2014] [Revised: 05/27/2014] [Accepted: 07/07/2014] [Indexed: 01/15/2023]
Abstract
UNLABELLED Biofilms play a key role in bacterial resistance against antibacterial agents-an issue that causes multiple problems in medical fields, particularly with Staphylococcus biofilms that colonize medical indwelling devices. The literature reports several anti-biofilm strategies that have been applied in medicine. Disrupting the biofilm formation process creates new sites open to colonization by treatment-generated planktonic bacteria, so efforts have turned to focus on strategies to prevent and control the initial Staphylococci adhesion. Here, we investigated the preventive activities of three commercial proteases (Flavourzyme, Neutrase and Alcalase) against biofilm formation by two Staphylococcus strains. Some proteolytic extracts revealed interesting results with Staphylococcus epidermidis and Staphylococcus aureus aureus biofilms. SIGNIFICANCE AND IMPACT OF THE STUDY Three proteases were tested against Staphylococcus aureus and Staphylococcus epidermidis biofilms in standard conditions. The Flavourzyme containing a mix of Aspergillus orizae endo- and exoproteases demonstrated significant efficacy against Staph. epidermidis biofilm formation. These results could prove valuable in the effort to develop simple anti-biofilm methods.
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Affiliation(s)
- P-H Elchinger
- Institut de Chimie de Clermont-Ferrand, Clermont Université, Université Blaise Pascal, Clermont-Ferrand, France; CNRS, UMR 6296, ICCF, Aubière, France; Institut Pascal UMR CNRS 6602, Polytech Clermont-Ferrand, Clermont Université, Université Blaise Pascal, Aubière Cedex, France
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Puissant C, Abraham P, Durand S, Humeau-Heurtier A, Faure S, Rousseau P, Mahé G. [Endothelial function: role, assessment and limits]. J Mal Vasc 2013. [PMID: 24355615 DOI: 10.1016/j.jmv.2013.11.004.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
For several years, detecting and preventing cardiovascular diseases have become a major issue. Different methods have been developed to evaluate endothelial function. Endothelial dysfunction is one of the first steps leading to atherosclerosis. This review presents an insight into endothelial function, the interests of its assessment and methods for studying endothelial function. To date, the vascular endothelium must be considered as a specific organ with its own functions that contribute to the homeostasis of the cardiovascular system. Endothelial dysfunction typically corresponds to a decrease of nitric oxide NO bioavailability. Biological or physico-chemical methods may be used to assess dysfunction. Biological methods allow measuring NO metabolites and pro-inflammatory and vasoconstrictor mediators released by the endothelium. The physico-chemical methods include intra-coronary injections, plethysmography, flow-mediated dilation (FMD), digital plethysmography and optical techniques using laser (laser Doppler single-point, laser Doppler imager, laser speckle contrast imaging) that can be coupled with provocation tests (iontophoresis, microdialysis, post-ischemic hyperemia, local heating). The principle of each technique and its use in clinical practice are discussed. Studying endothelial dysfunction is a particularly promising field because of new drugs being developed. Nevertheless, assessment methodology still needs further development to enable reliable, non-invasive, reproducible, and inexpensive ways to analyze endothelial dysfunction.
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Affiliation(s)
- C Puissant
- Service des explorations fonctionnelles vasculaires, centre hospitalier universitaire, 49933 Angers cedex 9, France
| | - P Abraham
- Service des explorations fonctionnelles vasculaires, centre hospitalier universitaire, 49933 Angers cedex 9, France; Biologie neurovasculaire et mitochondriale intégrée (BNMI) - unité mixte UMR CNRS 6214/Inserm U 1083, faculté de médecine, LUNAM université, 49045 Angers, France
| | - S Durand
- EA 4334 motricity, interactions, and performance, LUNAM université, université du Maine, 72085 Le Mans cedex 9, France
| | - A Humeau-Heurtier
- Laboratoire d'ingénierie des systèmes automatisés (LISA), LUNAM université, université d'Angers, 49000 Angers, France
| | - S Faure
- Stress oxydant et pathologies métaboliques (SOPAM), Inserm U1063, LUNAM université, université d'Angers, 40045 Angers, France
| | - P Rousseau
- Département de chirurgie plastique, centre hospitalier universitaire, 49933 Angers cedex 9, France
| | - G Mahé
- Biologie neurovasculaire et mitochondriale intégrée (BNMI) - unité mixte UMR CNRS 6214/Inserm U 1083, faculté de médecine, LUNAM université, 49045 Angers, France; Pôle imagerie médicale, centre hospitalier universitaire Pontchaillou, 2, avenue du Pr-Léon-Bernard, 35033 Rennes cedex 9, France.
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Puissant C, Abraham P, Durand S, Humeau-Heurtier A, Faure S, Rousseau P, Mahé G. [Endothelial function: role, assessment and limits]. ACTA ACUST UNITED AC 2013; 39:47-56. [PMID: 24355615 DOI: 10.1016/j.jmv.2013.11.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [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: 05/22/2013] [Accepted: 10/24/2013] [Indexed: 12/16/2022]
Abstract
For several years, detecting and preventing cardiovascular diseases have become a major issue. Different methods have been developed to evaluate endothelial function. Endothelial dysfunction is one of the first steps leading to atherosclerosis. This review presents an insight into endothelial function, the interests of its assessment and methods for studying endothelial function. To date, the vascular endothelium must be considered as a specific organ with its own functions that contribute to the homeostasis of the cardiovascular system. Endothelial dysfunction typically corresponds to a decrease of nitric oxide NO bioavailability. Biological or physico-chemical methods may be used to assess dysfunction. Biological methods allow measuring NO metabolites and pro-inflammatory and vasoconstrictor mediators released by the endothelium. The physico-chemical methods include intra-coronary injections, plethysmography, flow-mediated dilation (FMD), digital plethysmography and optical techniques using laser (laser Doppler single-point, laser Doppler imager, laser speckle contrast imaging) that can be coupled with provocation tests (iontophoresis, microdialysis, post-ischemic hyperemia, local heating). The principle of each technique and its use in clinical practice are discussed. Studying endothelial dysfunction is a particularly promising field because of new drugs being developed. Nevertheless, assessment methodology still needs further development to enable reliable, non-invasive, reproducible, and inexpensive ways to analyze endothelial dysfunction.
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Affiliation(s)
- C Puissant
- Service des explorations fonctionnelles vasculaires, centre hospitalier universitaire, 49933 Angers cedex 9, France
| | - P Abraham
- Service des explorations fonctionnelles vasculaires, centre hospitalier universitaire, 49933 Angers cedex 9, France; Biologie neurovasculaire et mitochondriale intégrée (BNMI) - unité mixte UMR CNRS 6214/Inserm U 1083, faculté de médecine, LUNAM université, 49045 Angers, France
| | - S Durand
- EA 4334 motricity, interactions, and performance, LUNAM université, université du Maine, 72085 Le Mans cedex 9, France
| | - A Humeau-Heurtier
- Laboratoire d'ingénierie des systèmes automatisés (LISA), LUNAM université, université d'Angers, 49000 Angers, France
| | - S Faure
- Stress oxydant et pathologies métaboliques (SOPAM), Inserm U1063, LUNAM université, université d'Angers, 40045 Angers, France
| | - P Rousseau
- Département de chirurgie plastique, centre hospitalier universitaire, 49933 Angers cedex 9, France
| | - G Mahé
- Biologie neurovasculaire et mitochondriale intégrée (BNMI) - unité mixte UMR CNRS 6214/Inserm U 1083, faculté de médecine, LUNAM université, 49045 Angers, France; Pôle imagerie médicale, centre hospitalier universitaire Pontchaillou, 2, avenue du Pr-Léon-Bernard, 35033 Rennes cedex 9, France.
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Roos A, Faure S, Lochner C, Vythilingum B, Stein DJ. Predictors of distress and anxiety during pregnancy. ACTA ACUST UNITED AC 2013; 16:118-22. [PMID: 23595531 DOI: 10.4314/ajpsy.v16i2.15] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2011] [Accepted: 03/14/2012] [Indexed: 11/17/2022]
Abstract
OBJECTIVE There is a high incidence of distressing psychological symptoms including anxiety in pregnancy. Nevertheless, predictors of distress and anxiety during pregnancy have not been well characterized. We determined whether temperament and character, trait anxiety, resilience, and social support predicted distress and anxiety symptoms in pregnancy. METHOD Pregnant women (n=105) with low risk singleton pregnancies were recruited from Midwife Obstetric Units. Assessments of distress (using the K-10) and anxiety (using the Spielberger State Inventory) were undertaken in trimester 2 and 3. Measures of temperament and character, trait anxiety, resilience and social support were undertaken at the same time points. Regression analyses were used to determine predictors of distress and anxiety at each trimester. RESULTS Predictors of distress and anxiety were lower selfdirectedness, higher harm avoidance, higher trait anxiety, lower resilience, and lower social support, at each time point. CONCLUSION Understanding predictors of distress and anxiety in pregnancy may be useful in developing interventions for addressing such symptoms, as well as perhaps in preventing potential sequelae such as anxiety and mood disorders.
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Affiliation(s)
- A Roos
- Department of Psychiatry, Stellenbosch University, Stellenbosch, South Africa.
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Roy O, Caumes C, Esvan Y, Didierjean C, Faure S, Taillefumier C. The tert-Butyl Side Chain: A Powerful Means to Lock Peptoid Amide Bonds in the Cis Conformation. Org Lett 2013; 15:2246-9. [DOI: 10.1021/ol400820y] [Citation(s) in RCA: 81] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- O. Roy
- Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, F-63000 Clermont-Ferrand, France, CNRS, UMR 6296, ICCF, BP 80026, F-63171 Aubière, France, and CRM2, Equipe Biocristallographie, UMR 7036 CNRS-UL, Faculté des Sciences et Techniques, Université de Lorraine, BP 239, 54506 Vandoeuvre-lès-Nancy, France
| | - C. Caumes
- Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, F-63000 Clermont-Ferrand, France, CNRS, UMR 6296, ICCF, BP 80026, F-63171 Aubière, France, and CRM2, Equipe Biocristallographie, UMR 7036 CNRS-UL, Faculté des Sciences et Techniques, Université de Lorraine, BP 239, 54506 Vandoeuvre-lès-Nancy, France
| | - Y. Esvan
- Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, F-63000 Clermont-Ferrand, France, CNRS, UMR 6296, ICCF, BP 80026, F-63171 Aubière, France, and CRM2, Equipe Biocristallographie, UMR 7036 CNRS-UL, Faculté des Sciences et Techniques, Université de Lorraine, BP 239, 54506 Vandoeuvre-lès-Nancy, France
| | - C. Didierjean
- Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, F-63000 Clermont-Ferrand, France, CNRS, UMR 6296, ICCF, BP 80026, F-63171 Aubière, France, and CRM2, Equipe Biocristallographie, UMR 7036 CNRS-UL, Faculté des Sciences et Techniques, Université de Lorraine, BP 239, 54506 Vandoeuvre-lès-Nancy, France
| | - S. Faure
- Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, F-63000 Clermont-Ferrand, France, CNRS, UMR 6296, ICCF, BP 80026, F-63171 Aubière, France, and CRM2, Equipe Biocristallographie, UMR 7036 CNRS-UL, Faculté des Sciences et Techniques, Université de Lorraine, BP 239, 54506 Vandoeuvre-lès-Nancy, France
| | - C. Taillefumier
- Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, F-63000 Clermont-Ferrand, France, CNRS, UMR 6296, ICCF, BP 80026, F-63171 Aubière, France, and CRM2, Equipe Biocristallographie, UMR 7036 CNRS-UL, Faculté des Sciences et Techniques, Université de Lorraine, BP 239, 54506 Vandoeuvre-lès-Nancy, France
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Nachon O, Gindt M, Garcia R, Faure S. 2279 – Post traumatic stress symptoms and anxiety as attentional bias modulators in “control” population. Eur Psychiatry 2013. [DOI: 10.1016/s0924-9338(13)77139-6] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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Le Gouis J, Bordes J, Ravel C, Heumez E, Faure S, Praud S, Galic N, Remoué C, Balfourier F, Allard V, Rousset M. Genome-wide association analysis to identify chromosomal regions determining components of earliness in wheat. Theor Appl Genet 2012; 124:597-611. [PMID: 22065067 DOI: 10.1007/s00122-011-1732-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2011] [Accepted: 10/14/2011] [Indexed: 05/18/2023]
Abstract
The modification of flowering date is considered an important way to escape the current or future climatic constraints that affect wheat crops. A better understanding of its genetic bases would enable a more efficient and rapid modification through breeding. The objective of this study was to identify chromosomal regions associated with earliness in wheat. A 227-wheat core collection chosen to be highly contrasted for earliness was characterized for heading date. Experiments were conducted in controlled conditions and in the field for 3 years to break down earliness in the component traits: photoperiod sensitivity, vernalization requirement and narrow-sense earliness. Whole-genome association mapping was carried out using 760 molecular markers and taking into account the five ancestral group structure. We identified 62 markers individually associated to earliness components corresponding to 33 chromosomal regions. In addition, we identified 15 other significant markers and seven more regions by testing marker pair interactions. Co-localizations were observed with the Ppd-1, Vrn-1 and Rht-1 candidate genes. Using an independent set of lines to validate the model built for heading date, we were able to explain 34% of the variation using the structure and the significant markers. Results were compared with already published data using bi-parental populations giving an insight into the genetic architecture of flowering time in wheat.
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Affiliation(s)
- J Le Gouis
- INRA, UMR 1095 Génétique, Diversité et Ecophysiologie des Céréales, 234 Avenue du Brézet, 63 100, Clermont-Ferrand, France.
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24
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Fabre CM, Cheiney P, Gattobigio GL, Vermersch F, Faure S, Mathevet R, Lahaye T, Guéry-Odelin D. Realization of a distributed Bragg reflector for propagating guided matter waves. Phys Rev Lett 2011; 107:230401. [PMID: 22182068 DOI: 10.1103/physrevlett.107.230401] [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] [Subscribe] [Scholar Register] [Received: 07/27/2011] [Indexed: 05/31/2023]
Abstract
We report on the experimental study of a Bragg reflector for guided, propagating Bose-Einstein condensates. A one-dimensional attractive optical lattice of finite length created by red-detuned laser beams selectively reflects some velocity components of the incident matter wave packet. We find quantitative agreement between the experimental data and one-dimensional numerical simulations and show that the Gaussian envelope of the optical lattice has a major influence on the properties of the reflector. In particular, it gives rise to multiple reflections of the wave packet between two symmetric locations where Bragg reflection occurs. Our results are a further step towards integrated atom-optics setups for quasi-cw matter waves.
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Affiliation(s)
- C M Fabre
- Université de Toulouse, UPS, Laboratoire Collisions Agrégats Réactivité, IRSAMC, F-31062 Toulouse, France
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25
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Coutté A, Faure S, Olivier G. Influence de la préparation d’une atteinte manuelle sur l’orientation initiale de l’attention lors d’une tâche de recherche visuelle. Psychologie Française 2011. [DOI: 10.1016/j.psfr.2011.01.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Cheiney P, Carraz O, Bartoszek-Bober D, Faure S, Vermersch F, Fabre CM, Gattobigio GL, Lahaye T, Guéry-Odelin D, Mathevet R. A Zeeman slower design with permanent magnets in a Halbach configuration. Rev Sci Instrum 2011; 82:063115. [PMID: 21721682 DOI: 10.1063/1.3600897] [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] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We describe a simple Zeeman slower design using permanent magnets. Contrary to common wire-wound setups, no electric power and water cooling are required. In addition, the whole system can be assembled and disassembled at will. The magnetic field is however transverse to the atomic motion and an extra repumper laser is necessary. A Halbach configuration of the magnets produces a high quality magnetic field and no further adjustment is needed. After optimization of the laser parameters, the apparatus produces an intense beam of slow and cold (87)Rb atoms. With typical fluxes of (1-5) × 10(10) atoms/s at 30 m s(-1), our apparatus efficiently loads a large magneto-optical trap with more than 10(10) atoms in 1 s, which is an ideal starting point for degenerate quantum gas experiments.
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Affiliation(s)
- P Cheiney
- Université de Toulouse, UPS - 118 route de Narbonne, F-31062 Toulouse, France
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Pageaux GP, Faure S, Chermak F, Bismuth M, Bouyabrine H. [Liver transplantation in a patient with alcoholic cirrhosis: discussion about nonabstinence]. Gastroenterol Clin Biol 2009; 33:F44-F49. [PMID: 19747790 DOI: 10.1016/j.gcb.2009.08.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Liver transplantation is the recognized treatment for serious cases of alcoholic cirrhosis. However, due to their poor image within society, patients with alcoholic cirrhosis are often less referred to transplant centres. This is even more surprising since in terms of patient' and graft's survival, the results of transplantation are comparable, if not better, than in other indications. Transplantation is the treatment for the liver disease, not a treatment for alcoholism. In the case of severe alcoholic disease, a relapse is neither surprising nor unacceptable or insignificant if severe. In this case, it has an impact on the long-term survival, notably due to mortality by cancer. All the medical teams carrying out transplants agree that abstinence is necessary when a patient is being evaluated for liver transplantation. However, it is not proven that a set period of 6 months' abstinence prior to the transplantation can modify the results. The problem of alcoholism must be treated specifically in terms of addiction both before and after transplantation.
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Affiliation(s)
- G-P Pageaux
- Pôle digestif, service d'hépatogastroentérologie et transplantation hépatique, CHU Saint-Eloi, 80 rue Augustin-Fliche, Montpellier cedex 5, France.
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Bergaya S, Faure S, Achard JM, Henrion D, Bonnin P, Jeunemaitre X, Hadchouel J. J026 A role for L-WNK1 in cardiovascular development and vasoconstriction. Arch Cardiovasc Dis 2009. [DOI: 10.1016/s1875-2136(09)72401-5] [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: 11/27/2022]
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Clere N, Corre I, Faure S, Guihot AL, Vessieres E, Chalopin M, Morel A, Coqueret O, Hein L, Delneste Y, Paris F, Henrion D. D004 Pharmacological blockade of angiotensin II type 2 receptor inhibits tumor growth decreasing cell proliferation and tumor vascularization. Arch Cardiovasc Dis 2009. [DOI: 10.1016/s1875-2136(09)72214-4] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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31
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Faure S, Clere N, Vessieres E, Corre I, Paris F, Henrion D. D029 Influence of candesartan in tumor growth in a mouse model of hypertension induced by endothelin-1. Arch Cardiovasc Dis 2009. [DOI: 10.1016/s1875-2136(09)72239-9] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Nandrino JL, Escande JD, Faure S, Doba K, Vandeweeghe E. Profil psychologique et comportemental de vulnérabilité à la dépendance à l’exercice et au risque de pratiques dopantes chez les sportifs amateurs: l’exemple des semi-marathoniens. Annales Médico-psychologiques, revue psychiatrique 2008. [DOI: 10.1016/j.amp.2006.06.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Abstract
The first part of this article covers the main discoveries that led to the concept of hemispheric specialisation, from Egyptian antiquity to present times, through the pivotal XIXth century period that saw the attribution of specific cognitive functions to the left and right hemispheres. Next, this dichotomous conception of cerebral function, attributing a given process to a hemisphere and hypothesising callosal transmission, is discussed in the light of recent studies on language comprehension. Present day knowledge suggesting an alternative to the structuralist view of hemispheric specialisation in the form of dynamic, complementary sharing of labour, and of cooperation through transcortical neural networks, is then considered. Finally, the role of the corpus callosum in interhemispheric communication is briefly covered. An emphasis is placed on the diversity of this structure that is at the origin of highly different functions (fibre size, homotopic vs heterotopic connections). Ultimately, we contrast the view of a corpus callosum serving as an information transmitting channel with that of a fibre tract co-activating the non-engaged hemisphere and preparing it for potential stimulation. In this manner, the corpus callosum minimises disparities in the distribution of attention between the two hemispheres.
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Affiliation(s)
- C Belin
- UF Mémoire et Maladies Neurodégénératives, Service de Neurologie, CHU Avicenne, AP-HP, 125 route de Stalingrad, 93009 Bobigny cedex, France.
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Magnié M, Bensa C, Laloux L, Bertogliati C, Faure S, Lebrun C. Intérêt des potentiels évoqués cognitifs dans la détection des troubles cognitifs précoces dans la sclérose en plaques. Rev Neurol (Paris) 2007; 163:1065-74. [DOI: 10.1016/s0035-3787(07)74179-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Faure S, Chapot R, Tallet D, Javellaud J, Achard JM, Oudart N. Cerebroprotective effect of angiotensin IV in experimental ischemic stroke in the rat mediated by AT(4) receptors. J Physiol Pharmacol 2006; 57:329-42. [PMID: 17033088] [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] [Received: 02/09/2006] [Accepted: 07/31/2006] [Indexed: 05/12/2023]
Abstract
Recent studies have reported potential roles of angiotensins in an adaptative physiological mechanism of protection against cerebral ischemia-induced neurological damages. In the present study, we examined the protective role of angiotensin IV (AngIV) in a rat model of embolic stroke induced by intracarotid injection of calibrated microspheres (50 microm). Internal carotid infusions of increasing doses of AngIV (0.01, 0.1 and 1 nmol/0.1 mL saline) dose dependently decreased mortality, neurological deficit and cerebral infarct size at 24 hours. With the highest dose of AngIV, mortality was reduced from 55 % in saline infused controls to 10 % (p=0.003), neurological deficit was reduced from 3.8 +/- 0.3 to 1.4 +/- 0.3 , (p<0.0001) and cerebral infarct size at 24 hours was decreased from 432 +/- 26 mm(3) to 185 +/- 19, (p=0.0001). The AT(4) antagonist divalinal-AngIV (10(-9) mol/0.1 mL), or pretreatment with L-NAME (10(-7) mol/0.1 mL), both completely abolished the protective effect of AngIV (1 nmol). The AT(2) antagonist PD123319 (10(-7) mol/0.1 mL) partially prevented the protective effect of AngIV on the neurological score. Sequential cerebral arteriographies revealed that AngIV induced a redistribution of blood flow to the ischemic areas within minutes. These results suggest that pharmacological doses of AngIV are protective against acute cerebral ischemia by triggering an AT(4)-mediated, NO-dependent intracerebral hemodynamic mechanism.
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Affiliation(s)
- S Faure
- Physiologie et Pharmacologie Vasculaire et Rénale, Facultés de Médecine et de Pharmacie, Limoges, France
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Causse J, Lagerge S, de Menorval LC, Faure S. Micellar solubilization of tributylphosphate in aqueous solutions of Pluronic block copolymers. J Colloid Interface Sci 2006; 300:724-34. [PMID: 16765368 DOI: 10.1016/j.jcis.2006.04.043] [Citation(s) in RCA: 12] [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] [Received: 11/02/2005] [Revised: 04/14/2006] [Accepted: 04/15/2006] [Indexed: 10/24/2022]
Abstract
The solubilization of tributylphosphate (TBP), a polar oil, in various micellar solutions of Pluronic has been investigated by (1)H NMR spectroscopy. Partial phase diagrams of the three components systems (Pluronic-TBP-water) have shown two characteristic temperatures, called CPT and SMT, which control the phase behavior (see Part I); Both temperature depend on the copolymer structure and, interestingly, are directly related to the TBP concentration in the medium. Monophasic microemulsions are observed only when the temperature ranges between the SMT and the CPT. Moreover, the evolution of the CPT with the TBP content clearly indicated the occurrence of a structural change of the microemulsions which allows higher quantities of TBP to be solubilized. In this second part, (1)H NMR studies of TPB/micellar systems have essentially focused on elucidating the nature of the interactions between TBP and micelle, or on the location of the solubilized species, mainly from the dependence of chemical shifts or linewidths on TBP concentration. Especially, the NMR spectra of the microemulsions before and after the structural change have been compared with those obtained for pure solution of Pluronic in D(2)O at different temperatures and in CDCl(3). The analysis of the (1)H NMR chemical shifts suggests a structural transformation of the TBP-Pluronic micelles in the sense of an hydrophobic TBP-PPO core becoming more and more dense as the TBP concentration increases. Especially, (1)H NMR data evidence an evolution of the hydration state of the hydrophobic core following addition of TBP in the micellar solutions. During the addition of TBP, the microemulsion structure turns from spherical swelled micelles to nanodroplets of pure TBP stabilized by the Pluronic (pure nanophase of TBP stabilized by the copolymer). It is shown that the structural change strongly depends on the temperatures (CPT and SMT, see Part I) and on the copolymer structure.
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Affiliation(s)
- J Causse
- Laboratoire des Agrégats Moléculaires et Matériaux Inorganiques, C.N.R.S. UMR-5072, Université de Montpellier II, CC 015, Place E. Bataillon, 34095 Montpellier Cedex 05, France
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Roland E, Dupré C, Lahiani P, Faure S. P13-10 - Mise en place de l’observation de l’état de santé bucco-dentaire dans les Centres d’examens de santé. Rev Epidemiol Sante Publique 2006. [DOI: 10.1016/s0398-7620(06)76968-1] [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: 11/15/2022] Open
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Causse J, Lagerge S, de Menorval LC, Faure S. Micellar solubilization of tributylphosphate in aqueous solutions of Pluronic block copolymers. J Colloid Interface Sci 2006; 300:713-23. [PMID: 16765367 DOI: 10.1016/j.jcis.2006.04.042] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2005] [Revised: 04/13/2006] [Accepted: 04/15/2006] [Indexed: 10/24/2022]
Abstract
Solubilization of tributylphosphate (TBP), a polar oil, in various micellar solutions of Pluronic has been investigated by turbidimetry emphasizing the effect of temperature and the role of the PPO and PEO blocks on the phase behavior of the three components systems (Pluronic-TBP-water). [Temperature-composition] diagrams allow monophasic and diphasic domains to be delimited. Two temperatures are shown to have a determining effect on the phase behavior (TBP solubilization); the well known cloud point temperature (CPT, here defined for the three components system) and the solubilization minimum temperature (SMT) which is defined as the lowest temperature allowing solubilization of TBP in the system. Both temperature depend on the copolymer structure and, interestingly, are directly related to the TBP concentration in the medium. Monophasic microemulsions are observed when the temperature ranges between the SMT and the CPT. When T<SMT, the phase separation occurs and is related to the formation of TBP in water emulsion droplets. When T>CPT the system separates in two phase due to the co-precipitation of TBP and Pluronic. Moreover an unexpected evolution of the CPT with the TBP content clearly indicates the occurrence of a structural change of the microemulsions which allows higher quantities of TBP to be solubilized. But the structural change does not allow alone higher quantities of TBP to be solubilized. A well compromise between the SMT and the CPT must be also observed so as to obtain a large extent of monophasic domain after the restructuration. The best compromise is obtained with Pluronics with intermediate hydrophobic character. Reversely, hydrophobic and hydrophilic Pluronics exhibit a very small extent of monophasic domain after the restructuration which does not allow benefit by the structural change.
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Affiliation(s)
- J Causse
- Laboratoire des Agrégats Moléculaires et Matériaux Inorganiques, C.N.R.S. UMR-5072, Université de Montpellier II, CC 015, Place E. Bataillon, 34095 Montpellier Cedex 05, France
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Steed A, Chandler E, Thomsett M, Gosman N, Faure S, Nicholson P. Identification of type I resistance to Fusarium head blight controlled by a major gene located on chromosome 4A of Triticum macha. Theor Appl Genet 2005; 111:521-9. [PMID: 15905991 DOI: 10.1007/s00122-005-2043-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2004] [Accepted: 04/18/2005] [Indexed: 05/02/2023]
Abstract
Using a set of 21 substitution lines of Triticum macha in a 'Hobbit Sib' background, it was previously demonstrated that chromosome 4A of T. macha carries significant resistance to Fusarium head blight. In the present study, the T. macha 4A resistance was further characterized in a 'Hobbit Sib' (T. macha 4A) single-recombinant chromosome doubled haploid (DH) population. Lines were phenotyped for disease resistance, yield components and deoxynivalenol (DON) mycotoxin content over two consecutive seasons. Both resistance to spread and resistance to initial infection were examined, and it was established that the resistance residing on T. macha 4A is predominantly of type I (resistance to initial infection). It was demonstrated that this type I resistance significantly lowered levels of DON accumulation in the grain and improved yield components under high disease pressure. Genotyping the DH lines using microsatellite genetic markers enabled the location of the gene(s) for resistance to be assigned to a region of the short arm of chromosome 4A, distal to microsatellite marker Xgwm601 and co-segregating with microsatellite marker Xgwm165 in this population.
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Affiliation(s)
- A Steed
- John Innes Centre, Norwich Research Park, Colney, Norwich, NR4 7UH, UK.
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Laloux L, Bensa C, Lebrun C, Bertogliatti C, Magnié M, Faure S. Détection précoce des troubles cognitifs dans la Sclérose en Plaques par la méthode des potentiels évoqués cognitifs. Rev Neurol (Paris) 2004. [DOI: 10.1016/s0035-3787(04)70972-8] [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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Théodorou I, Combadière C, Faure S, Debré P. [Chemokines and immunomodulation: applications for HIV infections]. J Soc Biol 2002; 196:7-11. [PMID: 12134637] [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: 02/25/2023]
Abstract
The genetic control of HIV infection by the host involves a certain number of genes, among which those which code for chemokines/chemokines receptors, cytokines, MHC. Genes such as CCR5, CCR2, SDF1, and more recently CX3CR1 received great attention from several laboratories including ours, since they play a role as HIV coreceptor and, as such, on the infectivity of the host. In addition, it was shown that the polymorphism of these genes influences the evolution of infection, whether they have a protective or deleterious effect. Results obtained by our laboratory on the genetic polymorphism and its implication in HIV infection will be reported herein. Furthermore, to better understand their role, we looked for the capacities that the chemokines may have to play an immunomodulatory function, independently of their chemoattractive effect. In two examples, we showed that chemokines influence notably the cellular immune functions, such as CD8 cytotoxicity (Rantes/CCR3) and gamma interferon production (fractalkine/CX3CR1). Globally, the results indicate that chemokines/chemokines receptors polymorphism represent important epidemiological factors, but also contributes to evaluate the prognosis of HIV infection, through a better understanding of the disease physiopathology.
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Affiliation(s)
- I Théodorou
- Laboratoire d'Immunologie Cellulaire et Tissulaire-INSERM U543 Pitié-Salpêtrière, 83, bd de l'Hôpital, 75013 Paris, France
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Abstract
Coordination of the different cytoskeleton networks in the cell is of central importance for morphogenesis, organelle transport, and motility. The Rho family proteins are well characterized for their effects on the actin cytoskeleton, but increasing evidence indicates that they may also control microtubule (MT) dynamics. Here, we demonstrate that a novel Cdc42/Rac effector, X-p21-activated kinase (PAK)5, colocalizes and binds to both the actin and MT networks and that its subcellular localization is regulated during cell cycle progression. In transfected cells, X-PAK5 promotes the formation of stabilized MTs that are associated in bundles and interferes with MTs dynamics, slowing both the elongation and shrinkage rates and inducing long paused periods. X-PAK5 subcellular localization is regulated tightly, since coexpression with active Rac or Cdc42 induces its shuttling to actin-rich structures. Thus, X-PAK5 is a novel MT-associated protein that may communicate between the actin and MT networks during cellular responses to environmental conditions.
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Affiliation(s)
- J Cau
- Centre de Recherche de Biochimie Macromoleculaire, Centre National de la Recherche Scientifique UPR 1086, 34293 Montpellier cedex 5, France
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Blanchet S, Desgranges B, Denise P, Lechevalier B, Eustache F, Faure S. New questions on the hemispheric encoding/retrieval asymmetry (HERA) model assessed by divided visual-field tachistoscopy in normal subjects. Neuropsychologia 2001; 39:502-9. [PMID: 11254932 DOI: 10.1016/s0028-3932(00)00119-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
According to the hemispheric encoding/retrieval asymmetry (HERA) model, based on data obtained through functional neuroimaging, the left and right prefrontal cortices are preferentially, and, respectively, involved in long-term episodic memory encoding and retrieval. In this study, the HERA model was tested from a behavioral perspective using divided visual-field tachistoscopy. A recognition paradigm with both verbal and visuospatial materials was devised to differentiate memory-related effects (encoding vs. retrieval) from effects linked to the materials. The paradigm used lists of 12 and four items to assess long-term episodic memory and short-term memory, respectively. The aim of the latter condition was to test whether the HERA model is applicable in short-term memory. For long-term episodic memory, the data obtained validated the HERA model; the direction of the hemispheric asymmetry was found to depend on the type of materials used, whereas its magnitude was determined by the type of memory process. For verbal short-term memory, the HERA model seems to be confirmed. The pre-existing representations of the material could take into account the similarity of the hemispheric asymmetry pattern between short-term memory and long-term memory. In contrast, for visuospatial short-term memory, Baddeley's working memory model seems to better explain our results insofar as the asymmetries were essentially linked to the material in encoding but not in retrieval. This latter difference between short-term memory and long-term indicates that processes involved in LTM depend on episodic processes per se, hence, lending more support for the HERA model. Accordingly, these two memory systems seem to bring into play two different modes of hemisphere specialization.
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Affiliation(s)
- S Blanchet
- Laboratoire de Psychologie Cognitive et Pathologique and Pôle Modélisation en Sciences Cognitives, Maison de la Recherche en Sciences Humaines, Université de Caen, 14032 Cedex, Caen, France
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Moatti D, Faure S, Fumeron F, Amara MEW, Seknadji P, McDermott DH, Debré P, Aumont MC, Murphy PM, de Prost D, Combadière C. Polymorphism in the fractalkine receptor CX3CR1 as a genetic risk factor for coronary artery disease. Blood 2001; 97:1925-8. [PMID: 11264153 DOI: 10.1182/blood.v97.7.1925] [Citation(s) in RCA: 264] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Coronary atherosclerosis is a major cause of death in industrialized countries. Monocytes, which play a key role in atherosclerosis, migrate into the vessel wall, presumably guided by specific chemoattractant and adhesion molecules. A compelling candidate for this role is the chemokine receptor CX3CR1, which is expressed on monocytes and acts as either a chemotactic receptor or an adhesion molecule, depending on whether its ligand, fractalkine, is presented free or membrane bound. A common variant of CX3CR1 was recently identified, encoded by the alleles I249 and M280, which form a common I(249)M(280) haplotype. When CX3CR1 genotypes were analyzed in 151 patients with acute coronary syndromes and in 249 healthy controls, CX3CR1 I249 heterozygosity was associated with a markedly reduced risk of acute coronary events, independent of established acquired coronary risk factors (eg, smoking, diabetes). The adjusted odds ratio for this allele was 0.43 (95% confidence interval, 0.26-0.72; P =.001). Consistent with this, functional analysis of peripheral blood mononuclear cells showed that CX3CR1 I249 heterozygosity was associated with a significant decrease in the number of fractalkine binding sites per cell. The results show that CX3CR1 I249 is an independent genetic risk factor for coronary artery disease and that CX3CR1 may be involved in the pathogenesis of atherosclerotic disease. (Blood. 2001;97:1925-1928)
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Affiliation(s)
- D Moatti
- INSERM U479, Faculté Bichat, Paris, France
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Querné L, Eustache F, Faure S. Interhemispheric inhibition, intrahemispheric activation, and lexical capacities of the right hemisphere: a tachistoscopic, divided visual-field study in normal subjects. Brain Lang 2000; 74:171-190. [PMID: 10950913 DOI: 10.1006/brln.2000.2333] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
This study proposes that the lexical-semantic capacities of the right hemisphere (RH) are underestimated in normal subjects and reexamines them in a "dynamic model" framework. As expected, overloading the left hemisphere by combining a lexical-decision task presented in divided visual field with a concurrent heavy verbal memory load, and activating the RH by combining the lexical-decision task with a concurrent visuo-imaged memory load, lead to enhanced left visual field-RH lexical performance. The RH appears to support a larger lexical-semantic network than suggested in the literature, including representations for long and nonimageable words, and the accessibility threshold for the representations stored therein is modulated by hemispheric activation-inhibition mechanisms.
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Affiliation(s)
- L Querné
- Laboratoire de Psychologie Cognitive et Pathologique, Université de Caen, Caen, France
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Abstract
Transforming growth factor beta (TGFbeta) superfamily signaling has been implicated in patterning of the early Xenopus embryo. Upon ligand stimulation, TGFbeta receptors phosphorylate Smad proteins at carboxy-terminal SS(V/M)S consensus motifs. Smads 1/5/8, activated by bone morphogenetic protein (BMP) signaling, induce ventral mesoderm whereas Smad2, activated by activin-like ligands, induces dorsal mesoderm. Although ectopic expression studies are consistent with roles for TGFbeta signals in early Xenopus embryogenesis, when and where BMP and activin-like signaling pathways are active endogenously has not been directly examined. In this study, we investigate the temporal and spatial activation of TGFbeta superfamily signaling in early Xenopus development by using antibodies specific for the type I receptor-phosphorylated forms of Smad1/5/8 and Smad2. We find that Smad1/5/8 and two distinct isoforms of Smad2, full-length Smad2 and Smad2(delta)exon3, are phosphorylated in early embryos. Both Smad1/5/8 and Smad2/Smad2(delta)exon3 are activated after, but not before, the mid-blastula transition (MBT). Endogenous activation of Smad2/Smad2(delta)exon3 requires zygotic transcription, while Smad1/5/8 activation at MBT appears to involve transcription-independent regulation. We also find that the competence of embryonic cells to respond to TGF(delta) superfamily ligands is temporally regulated and may be a determinant of early patterning. Levels of phospho-Smad1/5/8 and of phospho-Smad2/Smad2(delta)exon3 are asymmetrically distributed across both the animal-vegetal and dorsoventral axes. The timing of the development of these asymmetries differs for phospho-Smad1/5/8 and for phospho-Smad2/Smad2(delta)exon3, and the spatial distribution of phosphorylation of each Smad changes dramatically as gastrulation begins. We discuss the implications of our results for endogenous functions of BMP and activin-like signals as candidate morphogens regulating primary germ layer formation and dorsoventral patterning of the early Xenopus embryo.
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Affiliation(s)
- S Faure
- Department of Cell Biology, Harvard Medical School, Boston, MA 02115, USA.
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Faure S, Meyer L, Costagliola D, Vaneensberghe C, Genin E, Autran B, Delfraissy JF, McDermott DH, Murphy PM, Debré P, Théodorou I, Combadière C. Rapid progression to AIDS in HIV+ individuals with a structural variant of the chemokine receptor CX3CR1. Science 2000; 287:2274-7. [PMID: 10731151 DOI: 10.1126/science.287.5461.2274] [Citation(s) in RCA: 221] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Human immunodeficiency virus (HIV) enters cells in vitro via CD4 and a coreceptor. Which of 15 known coreceptors are important in vivo is poorly defined but may be inferred from disease-modifying mutations, as for CCR5. Here two single nucleotide polymorphisms are described in Caucasians in CX3CR1, an HIV coreceptor and leukocyte chemotactic/adhesion receptor for the chemokine fractalkine. HIV-infected patients homozygous for CX3CR1-I249 M280, a variant haplotype affecting two amino acids (isoleucine-249 and methionine-280), progressed to AIDS more rapidly than those with other haplotypes. Functional CX3CR1 analysis showed that fractalkine binding is reduced among patients homozygous for this particular haplotype. Thus, CX3CR1-I249 M280 is a recessive genetic risk factor in HIV/AIDS.
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MESH Headings
- Acquired Immunodeficiency Syndrome/genetics
- Acquired Immunodeficiency Syndrome/physiopathology
- Acquired Immunodeficiency Syndrome/virology
- CX3C Chemokine Receptor 1
- Case-Control Studies
- Chemokine CX3CL1
- Chemokines, CX3C
- Chemokines, CXC/metabolism
- Chromosomes, Human, Pair 3
- Cohort Studies
- Disease Progression
- Genetic Variation
- Genotype
- HIV/physiology
- HIV Infections/genetics
- HIV Infections/physiopathology
- HIV Infections/virology
- Haplotypes
- Homozygote
- Humans
- Leukocytes, Mononuclear/metabolism
- Linkage Disequilibrium
- Membrane Proteins/metabolism
- Mutation
- Polymorphism, Restriction Fragment Length
- Polymorphism, Single Nucleotide
- Polymorphism, Single-Stranded Conformational
- Receptors, Cytokine/genetics
- Receptors, Cytokine/physiology
- Receptors, HIV/genetics
- Receptors, HIV/physiology
- Survival Analysis
- White People/genetics
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Affiliation(s)
- S Faure
- Laboratoire d'Immunologie Cellulaire et Tissulaire, Centre National de la Recherche Scientifique UMR 7627, Hôpital Pitié-Salpétrière, Paris, France
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Cau J, Faure S, Vigneron S, Labbé JC, Delsert C, Morin N. Regulation of Xenopus p21-activated kinase (X-PAK2) by Cdc42 and maturation-promoting factor controls Xenopus oocyte maturation. J Biol Chem 2000; 275:2367-75. [PMID: 10644687 DOI: 10.1074/jbc.275.4.2367] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Signal transduction cascades involved in regulation of the cell cycle machinery are poorly understood. In the Xenopus oocyte model, meiotic maturation is triggered by MPF, a complex of p34(cdc2)-cyclin B, which is activated in response to a progesterone signal by largely unknown mechanisms. We have previously shown that the p21-activated kinase (PAK) family negatively regulates the MPF amplification loop. In this study, we identify the endogenous PAK2 as a key enzyme in this regulation and describe the pathways by which PAK2 is regulated. We show that the small GTPase Cdc42 is required for maintenance of active endogenous X-PAK2 in resting stage VI oocytes, whereas Rac1 is not involved in this regulation. During the process of maturation, X-PAK2 phosphorylation results in its inactivation and allows maturation to proceed to completion. Activation of mitogen-activated protein kinase and cyclin B-p34(cdc2) is coincident with X-PAK2 inactivation, and purified active MPF inhibits X-PAK2, demonstrating the existence of a new positive feedback loop. Our results confirm and extend the importance of p21-activated kinases in the control of the G(2)/M transition. We hypothesize that the X-PAK2/Cdc42 pathway could link p34(cdc2) activity to the major cytoskeleton rearrangements leading to spindle migration and anchorage to the animal pole cortex.
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Affiliation(s)
- J Cau
- Centre de Recherche de Biochimie Macromoléculaire, CNRS UPR 1086, 1919 Route de Mende, 34293 Montpellier cedex 5, France
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Caillot-Augusseau A, Lafage-Proust MH, Margaillan P, Vergely N, Faure S, Paillet S, Lang F, Alexandre C, Estour B. Weight gain reverses bone turnover and restores circadian variation of bone resorption in anorexic patients. Clin Endocrinol (Oxf) 2000; 52:113-21. [PMID: 10651762 DOI: 10.1046/j.1365-2265.2000.00879.x] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.3] [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: 11/20/2022]
Abstract
OBJECTIVE The present study was conducted in order to describe the variations and circadian rhythm of biochemical markers of bone remodelling at baseline and after weight gain in patients with anorexia nervosa (AN). SUBJECTS We studied 9 women (mean age 21 years, range: 16-30) with established AN who remained amenorrhoeic during the study and with a low body mass index (BMI) after refeeding and 6 female controls (mean age 20 years, range, 18-24 and BMI: 20.6 +/- 1.1 kg/m2). Refeeding was not associated with any other intervention or treatment, especially oestrogen replacement or hormonal contraception. Serum levels of oestradiol remained below 70 pmol/l before and after refeeding. MEASUREMENTS During the study, PTH and 25-hydroxyvitamin D measurements were performed. Markers of bone formation: serum intact osteocalcin (iBGP) and serum intact BGP + fragments (iBGP+F) and markers of bone resorption: urine C-teloptide of type I collagen (uCTX) and serum C-telopeptide ofvtype 1 collagen (s-CTX) were measured. RESULTS At baseline, PTH and 25 OH-vitamin D concentrations were within the normal range in AN patients and no significant variation was observed after refeeding. Bone formation markers were found to be significantly different at baseline between AN patients and controls. After refeeding, iBGP and iBGP+F levels increased by 172% and 154%, respectively, to values no different from controls. Intact BGP and iBGP+F exhibited a significant circadian variation in controls (P < 0.05 and P < 0.002, respectively), whereas we did not find any such circadian rhythm in AN patients. After refeeding no significant circadian variation was observed; however, iGBP+F tended to peak in early morning and exhibited a nadir in the afternoon. At baseline, sCTX was 2-fold higher in AN patients than in controls. After weight gain sCTX decreased significantly and reached control values. Refeeding induced a non-significant 40% decrease in uCTX. We found positive correlations between uCTX and the 24-h mean value of sCTX levels (r2 = 0.93, P < 0.0001) and between uCTX and the mean value of sCTX peak levels at 0800 h (r2 = 0.65, P < 0.0003). Serum CTX exhibited a significant circadian variation in controls (P < 0.001) with a peak at 0800 h and a nadir at 1600 h with a 60% decrease between peak and nadir values. We found that anorexia nervosa suppressed the sCTX circadian variation which was restored by refeeding. We found a significant non-linear relationship between BMI and sCTX/iBGP ratio in AN (r2 = 0.6, P < 0.0001), thus illustrating the influence of nutritional status on bone remodelling. CONCLUSIONS In this study we found that weight gain, related to refeeding only, reversed the anorexia nervosa-induced uncoupling of bone remodelling and restored circadian variation of a bone resorption marker.
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Affiliation(s)
- A Caillot-Augusseau
- Service Central de Medecine Nucléaire; Laboratoire de Biochimie et de Biologie du Tissu Osseux,/Equipe mixte INSERM 9901, Faculté de Médecine
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Seboun E, Oksenberg JR, Rombos A, Usuku K, Goodkin DE, Lincoln RR, Wong M, Pham-Dinh D, Boesplug-Tanguy O, Carsique R, Fitoussi R, Gartioux C, Reyes C, Ribierre F, Faure S, Fizames C, Gyapay G, Weissenbach J, Dautigny A, Rimmler JB, Garcia ME, Pericak-Vance MA, Haines JL, Hauser SL. Linkage analysis of candidate myelin genes in familial multiple sclerosis. Neurogenetics 1999; 2:155-62. [PMID: 10541588 DOI: 10.1007/s100480050076] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [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: 10/28/2022]
Abstract
Multiple sclerosis (MS) is an autoimmune demyelinating disease of the central nervous system. A complex genetic etiology is thought to underlie susceptibility to this disease. The present study was designed to analyze whether differences in genes that encode myelin proteins influence susceptibility to MS. We performed linkage analysis of MS to markers in chromosomal regions that include the genes encoding myelin basic protein (MBP), proteolipid protein (PLP), myelin-associated glycoprotein (MAG), oligodendrocyte myelin glycoprotein (OMGP), and myelin oligodendrocyte glycoprotein (MOG) in a well-characterized population of 65 multiplex MS families consisting of 399 total individuals, 169 affected with MS and 102 affected sibpairs. Physical mapping data permitted placement of MAG and PLP genes on the Genethon genetic map; all other genes were mapped on the Genethon genetic map by linkage analysis. For each gene, at least one marker within the gene and/or two tightly linked flanking markers were analyzed. Marker data analysis employed a combination of genetic trait model-dependent (parametric) and model-independent linkage methods. Results indicate that MAG, MBP, OMGP, and PLP genes do not have a significant genetic effect on susceptibility to MS in this population. As MOG resides within the MHC, a potential role of the MOG gene could not be excluded.
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Affiliation(s)
- E Seboun
- CNRS-URA 122, Généthon, and Pierre and Marie Curie University, Paris, France
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