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Fontanilles M, Deniel A, Marguet F, Beaussire L, Magne N, Derrey S, Blanchard F, Alexandru C, Coutant S, Laquerrière A, Clatot F, Di Fiore F, Sarafan-Vasseur N. Usefulness of circulating tumor DNA from cerebrospinal fluid in recurrent high-grade glioma. Rev Neurol (Paris) 2022; 178:975-980. [PMID: 35871016 DOI: 10.1016/j.neurol.2022.02.462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 01/01/2022] [Accepted: 02/21/2022] [Indexed: 10/17/2022]
Abstract
Molecular documentation at relapse of high-grade glioma is an urgent need for patient care. A prospective pilot study was conducted to assess the rate of mutation detection using targeted deep sequencing on circulating tumor DNA from cerebrospinal fluid (CSF) after chemo-radiotherapy based treatment. Fifteen patients were included: 13 patients with glioblastoma, 1 patient with gliosarcoma and 1 patient with anaplastic astrocytoma. At progression, 10/15 patients (67%) had detectable mutations in the CSF. Among them, 5/10 patients harbored at least one common mutation between initial tumor and ctDNA. CSF protein level and cfDNA concentration were higher, although not significant, in the ctDNA positive group versus ctDNA negative group (1.17g/L vs. 0.79g/L). Molecular documentation obtained from ctDNA in CSF at the time of relapse is informative in around two-thirds of the patients.
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Affiliation(s)
- M Fontanilles
- UNIROUEN, Inserm U1245, IRON group, Normandy Centre for Genomic and Personalized Medicine, Normandie university, Rouen University Hospital, 76031 Rouen, France; Department of Medical Oncology, Cancer Centre Henri Becquerel, 76000 Rouen, France.
| | - A Deniel
- Department of Medical Oncology, Cancer Centre Henri Becquerel, 76000 Rouen, France
| | - F Marguet
- Normandie Univ, UNIROUEN, Inserm U1245, Normandy Centre for Genomic and Personalized Medicine, Rouen, France; Department of Pathology, Rouen University Hospital, 76031 Rouen, France
| | - L Beaussire
- UNIROUEN, Inserm U1245, IRON group, Normandy Centre for Genomic and Personalized Medicine, Normandie university, Rouen University Hospital, 76031 Rouen, France
| | - N Magne
- Department of Radiology, Rouen University Hospital, 76031 Rouen, France
| | - S Derrey
- Department of Neurosurgery, Rouen University Hospital, 76031 Rouen, France
| | - F Blanchard
- Normandie Univ, UNIROUEN, Inserm U1245, Normandy Centre for Genomic and Personalized Medicine, Rouen, France; Department of Pathology, Rouen University Hospital, 76031 Rouen, France
| | - C Alexandru
- Department of Medical Oncology, Cancer Centre Henri Becquerel, 76000 Rouen, France
| | - S Coutant
- UNIROUEN, Inserm U1245, IRON group, Normandy Centre for Genomic and Personalized Medicine, Normandie university, Rouen University Hospital, 76031 Rouen, France
| | - A Laquerrière
- Normandie Univ, UNIROUEN, Inserm U1245, Normandy Centre for Genomic and Personalized Medicine, Rouen, France; Department of Pathology, Rouen University Hospital, 76031 Rouen, France
| | - F Clatot
- UNIROUEN, Inserm U1245, IRON group, Normandy Centre for Genomic and Personalized Medicine, Normandie university, Rouen University Hospital, 76031 Rouen, France; Department of Medical Oncology, Cancer Centre Henri Becquerel, 76000 Rouen, France
| | - F Di Fiore
- UNIROUEN, Inserm U1245, IRON group, Normandy Centre for Genomic and Personalized Medicine, Normandie university, Rouen University Hospital, 76031 Rouen, France; Department of Medical Oncology, Cancer Centre Henri Becquerel, 76000 Rouen, France; Department of Hepatogastroenterology, Rouen University Hospital, 76031 Rouen, France
| | - N Sarafan-Vasseur
- UNIROUEN, Inserm U1245, IRON group, Normandy Centre for Genomic and Personalized Medicine, Normandie university, Rouen University Hospital, 76031 Rouen, France
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Guiramand L, Ropagnol X, Blanchard F. Time-frequency analysis of two-photon absorption effect during optical rectification in a ZnTe crystal pumped at 1.024 µm. Opt Lett 2021; 46:6047-6050. [PMID: 34913915 DOI: 10.1364/ol.441231] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 11/03/2021] [Indexed: 06/14/2023]
Abstract
Optical rectification in nonlinear crystals is a well-established method for generating terahertz (THz) waves from ultra-short optical pulses. To achieve high conversion efficiency, the phase-matching conditions between the pump pulse and the generated THz wave within the nonlinear medium must be satisfied. For a ytterbium laser operating at 1.024 µm, a severe phase mismatch occurs in the zinc telluride (ZnTe) crystal, preventing the efficient generation of broadband THz pulses. Using time-frequency analysis, we show that the ultrafast charge carrier dynamic, mainly induced by two-photon absorption, generated in the nonlinear medium during optical rectification processes in ZnTe, plays a crucial role in the filtering of the out-of-phase components of the THz signal, thus enabling the recovery of broadband THz pulse generations.
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Noël F, Xexéo G, Mangeli E, Mothé A, Marques P, Kritz J, Blanchard F, Vermelho H, Paiva BD. SCREENER, an educational game for teaching the Drug Discovery and Development process. Braz J Med Biol Res 2021; 54:e11786. [PMID: 34878067 PMCID: PMC8647901 DOI: 10.1590/1414-431x2021e11786] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Accepted: 10/06/2021] [Indexed: 11/26/2022] Open
Abstract
Although the use of games as an educational strategy is an important current trend, there is practically no option available for training people on the Drug Discovery and Development (DDD) process. To fill this gap, we designed “SCREENER”, a science game that is intended to be educational, but also challenging and interesting enough to ensure player engagement. Our main target audience is students of postgraduate programs in pharmacology, medicinal chemistry, pharmacy, and medicine. This game could also be of interest to the pharmaceutical industry and regulatory and patent agencies for training new employees. We discuss the creation of SCREENER, a hybrid of board and card games, and present its components with some examples of cards and resources, as well as the dynamics of the game. SCREENER mimics the process of drug discovery and development from validating a target to registering the new drug with the regulatory agency, and can be played individually (self-learning) or with the help of a monitor who assists up to six players/teams. Briefly, 29 task cards categorized in four major areas (efficacy, safety, pharmacokinetics, and pharmaceutical development) must be purchased sequentially. Classic characteristics of games such as decision making and challenge have been incorporated. More in-depth information on the tasks and technical terms is available through QR codes. The vagaries of the DDD process are mimicked by the bonus/setback cards. The evaluation of our first test with students is presented and supports the usefulness of this new tool.
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Affiliation(s)
- F Noël
- Laboratório de Farmacologia Bioquímica e Molecular, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil.,Programa de Pós-Graduação em Farmacologia e Química Medicinal, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil.,Instituto Nacional de Ciência e Tecnologia em Fármacos e Medicamentos, Rio de Janeiro, RJ, Brasil
| | - G Xexéo
- Laboratório de Ludologia, Engenharia e Simulação, Programa de Engenharia de Sistemas e Computação, COPPE, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil.,Departamento de Ciência da Computação, Instituto de Matemática, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - E Mangeli
- Laboratório de Ludologia, Engenharia e Simulação, Programa de Engenharia de Sistemas e Computação, COPPE, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil.,Instituto de Computação, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - A Mothé
- Laboratório de Farmacologia Bioquímica e Molecular, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil.,Laboratório de Ludologia, Engenharia e Simulação, Programa de Engenharia de Sistemas e Computação, COPPE, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil.,Escola de Belas Artes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - P Marques
- Laboratório de Ludologia, Engenharia e Simulação, Programa de Engenharia de Sistemas e Computação, COPPE, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil.,Instituto de Computação, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - J Kritz
- Laboratório de Ludologia, Engenharia e Simulação, Programa de Engenharia de Sistemas e Computação, COPPE, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - F Blanchard
- Laboratório de Farmacologia Bioquímica e Molecular, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil.,Laboratório de Ludologia, Engenharia e Simulação, Programa de Engenharia de Sistemas e Computação, COPPE, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil.,Escola Politécnica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - H Vermelho
- Laboratório de Ludologia, Engenharia e Simulação, Programa de Engenharia de Sistemas e Computação, COPPE, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil.,Instituto de Computação, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - B de Paiva
- Laboratório de Farmacologia Bioquímica e Molecular, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil.,Laboratório de Ludologia, Engenharia e Simulação, Programa de Engenharia de Sistemas e Computação, COPPE, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil.,Escola Politécnica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
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Herman J, Le Goff B, De Lima J, Brion R, Chevalier C, Blanchard F, Darrieutort-Laffite C. POS0366 PRO-INFLAMMATORY EFFECTS OF HUMAN APATITE CRYSTALS EXTRACTED FROM PATIENTS SUFFERING FROM CALCIFIC TENDINOPATHY. Ann Rheum Dis 2021. [DOI: 10.1136/annrheumdis-2021-eular.2624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Background:Calcific tendonitis of the rotator cuff is due to carbonated apatite deposits in the shoulder tendons. During the evolution of the disease, an acute inflammatory episode may occur leading to the disappearance of the calcification. Although hydroxyapatite crystals-induced inflammation has been previously studied with synthetic crystals, no data are available with calcifications extracted from patients suffering from calcific tendinopathy. The objective of the study was to explore the inflammatory properties of human calcifications and the pathways involved.Objectives:The objective of the study was to explore the inflammatory properties of human calcifications and the pathways involved.Methods:Human calcifications were obtained from patients treated for their shoulder pain related to a calcific tendinopathy of the rotator cuff. Calcifications were extracted by ultrasound-guided lavage and aspiration as previously described [1]. Human calcifications and synthetic hydroxyapatite (sHA) were used in vitro to stimulate human monocytes and macrophages, the human myeloid cell line THP-1 and human tenocytes. The release of IL-1β, IL-6 and IL-8 by cells was quantified by ELISA. Gene expression of pro- and anti-inflammatory cytokines was evaluated by quantitative PCR. NF-kB activation and NLRP3 involvement was assessed in THP-1 cells using a NF-kB inhibitor and a Caspase 1 inhibitor. The inflammatory properties were then assessed in vivo using a mouse air pouch model. The membrane thickness and infiltrate were assessed 6 and 24 hours after the injection of human calcifications or synthetic hydroxyapatite using hematoxylin and eosin staining. Macrophages, neutrophils and lymphocytes infiltrates were assessed by immunohistochemistry. Total RNA was extracted from the membranes and expression of IL-1β, IL-6 and TNFβ was quantified by PCR.Results:Human calcifications were able to induce a significant release of IL-1β when incubated with monocytes, macrophages and THP-1 only if they were first primed with LPS (lipopolysaccharide) for monocytes and macrophages or PMA (Phorbol 12-myristate 13-acetate) for THP-1. No IL-1β was detected in tenocytes’ supernatants. Stimulation of THP-1 by human calcifications led to similar levels of IL-1β when compared to synthetic hydroxyapatite although these levels were significantly inferior in monocytes and macrophages. IL-6 and IL-8 levels were not increased in the supernatants after crystal stimulation. Patient’s crystals enhanced mRNA expression of pro-IL-1β, as well as IL-18, NF-kB and TGFβ when IL-6 and TNFα expression were not. IL-1β production was reduced by the inhibition NF-kB as well as Caspase 1 indicating the role of NLRP3 inflammasome. In vivo, injection of human calcifications or synthetic hydroxyapatite in air pouch led to significant increase in membrane thickness with an infiltrate mainly composed of macrophages. Significant overexpression of IL-1β was only observed in the synthetic hydroxyapatite group.Conclusion:As synthetic hydroxyapatite, human calcifications were able to induce an inflammatory response resulting in the production of IL-1β after NF-kB activation and through NLRP3 inflammasome. In some experiments, IL-1β induction was lower with human calcifications compared to synthetic apatite. Differences in size, shape and protein content may explain this observation.References:[1]Darrieutort-Laffite C, Arnolfo P, Garraud T, Adrait A, Couté Y, Louarn G, et al. Rotator Cuff Tenocytes Differentiate into Hypertrophic Chondrocyte-Like Cells to Produce Calcium Deposits in an Alkaline Phosphatase-Dependent Manner. J Clin Med. 2019 Sep 26;8(10):1544. doi: 10.3390/jcm8101544.Acknowledgements:Fondation Arthritis, Recherche et Rhumatismes and French Society for Rheumatology for their financial supportDisclosure of Interests:None declared
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Amirkhan F, Robichaud A, Ropagnol X, Gratuze M, Ozaki T, Nabki F, Blanchard F. Active terahertz time differentiator using piezoelectric micromachined ultrasonic transducer array. Opt Lett 2020; 45:3589-3592. [PMID: 32630906 DOI: 10.1364/ol.393917] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Accepted: 05/27/2020] [Indexed: 06/11/2023]
Abstract
The rapid growth of information technology is closely linked to our ability to modulate and demodulate a signal, whether in the frequency or in the time domain. Recent demonstrations of terahertz (THz) modulation involve active semiconductor metamaterial surfaces or use of a grating-based micromirror for frequency offset tuning. However, a wideband and active differentiator in the THz frequency band is yet to be demonstrated. Here, we propose a simple method to differentiate a THz pulse by inducing tiny phase changes on the THz beam path using a piezoelectric micromachined ultrasonic transducer array. We precisely demonstrate that the modulated THz signal detected after the piezoelectric device is proportional to the first-order derivative of the THz pulse. The proposed technique will be able to support a wide range of THz applications, such as peak detection schemes for telecommunication systems.
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Darrieutort-Laffite C, Arnolfo P, Correia E, Blanchard F, Le Goff B. AB0924 CALCIFIC TENDONITIS OF THE ROTATOR CUFF: PERIOSTIN ENRICHMENT IS ASSOCIATED WITH A BETTER RESPONSE TO ULTRASOUND-GUIDED PERCUTANEOUS LAVAGE. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.2632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background:Calcific tendonitis of the rotator cuff is a frequent cause of chronic shoulder pain. It is due to apatite deposits within the tendons. Little data are currently available about proteins associated to crystals within deposits.Objectives:The aim of the study was to quantify 6 proteins in calcific powders obtained from patients who have undergone an ultrasound-guided percutaneous lavage (UGPL) of their calcification and to look for correlations between their concentration and patient characteristics.Methods:Calcific powders were obtained from patients included in the CALCECHO trial whose main objective was to compare post-procedure pain between two groups: methylprednisolone or placebo injected at the end of the lavage [1]. Based on preliminary proteomic data and literature data, the following proteins have been selected and quantified by ELISA: Pigment-epithelium Derived Factor (PEDF), Osteopontin (OPN), Periostin (POSTN), Activin A (ACT A), Osteoprotegerin (OPG) and Bone Morphogenic Protein-2 (BMP-2). The level of each protein was expressed in µg per pg of the total proteins present in the sample. These proteins have been selected for their link to the mineralization. Correlations between the level of each protein and radiographic and ultrasound appearance of the calcific deposits were sought. We also looked for correlations between level of each protein and duration of pain or response to UGPL (Mann-Whitney test).Results:Sixty-six samples were studied: mean age was 48.9 (+/- 9.7) and 68% were female. Mean duration of shoulder pain was 30 months with a mean VAS pain of 68/100 (+/-14). Mean calcification size was 1.8 cm. Results of ELISA were as follows: mean level of PEDF at 1097 pg/µg, mean level of OPG at 135 pg/µg, mean level of POSTN at 6.9 pg/µg, mean level of ACT A at 19.6 pg/µg and mean level of OPN at 49.6 pg/µg although BMP-2 was undetectable. There was no correlation between level of proteins and the size of the calcification or the duration of pain. There was no difference in protein levels between type A and type B calcifications on radiography (classification of the French Society for Arthroscopy). In contrast, levels of POSTN and OPN were significantly higher in nodular calcifications compared to the homogenous (p=0.003 and p=0.01 respectively) or fragmented types (p=0.03 and p=0.04 respectively). Furthermore, calcifications without acoustic shadowing were enriched in POSTN compared to those with (p=0.04). Finally, the periostin level was significantly higher in calcifications that have responded well to UGPL (p=0.02).Conclusion:In this cohort of patients treated by UGPL, we observed higher levels of POSTN and OPN in the less dense calcifications and POSTN enrichment appeared to be associated with a better response to UGPL. Considering these data, further studies will be necessary to better understand the role of this protein in calcific tendonitis.References:[1]Darrieutort-Laffite C, Varin S, Coiffier G, Albert JD, Planche L, Maugars Y, Cormier G, Le Goff B. Are Corticosteroid Injections Needed After Needling and Lavage of Calcific Tendinitis: A Randomized, Double-Blind, Non-Inferiority Trial. Ann Rheum Dis. 2019 Jun;78(6):837-843.Disclosure of Interests:None declared
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Arikawa T, Hiraoka T, Morimoto S, Blanchard F, Tani S, Tanaka T, Sakai K, Kitajima H, Sasaki K, Tanaka K. Transfer of orbital angular momentum of light to plasmonic excitations in metamaterials. Sci Adv 2020; 6:eaay1977. [PMID: 32582843 PMCID: PMC7292619 DOI: 10.1126/sciadv.aay1977] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 05/01/2020] [Indexed: 06/11/2023]
Abstract
The emergence of the vortex beam with orbital angular momentum (OAM) has provided intriguing possibilities to induce optical transitions beyond the framework of the electric dipole interaction. The uniqueness stems from the OAM transfer from light to material, as demonstrated in electronic transitions in atomic systems. In this study, we report on the OAM transfer to electrons in solid-state systems, which has been elusive to date. Using metamaterials (periodically textured metallic disks), we show that multipolar modes of the surface electromagnetic excitations (so-called spoof localized surface plasmons) are selectively induced by the terahertz vortex beam. Our results reveal selection rules governed by the conservation of the total angular momentum, which is confirmed by numerical simulations. The efficient transfer of light's OAM to elementary excitations in solid-state systems at room temperature opens up new possibilities of OAM manipulation.
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Affiliation(s)
- T. Arikawa
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - T. Hiraoka
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - S. Morimoto
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - F. Blanchard
- Department of Electrical Engineering, École de technologie supérieure (ÉTS), Montréal, Québec H3C 1K3, Canada
| | - S. Tani
- Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Kyoto 606-8501, Japan
| | - T. Tanaka
- Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Kyoto 606-8501, Japan
| | - K. Sakai
- Research Institute for Electronic Science, Hokkaido University, Hokkaido 001-0020, Japan
| | - H. Kitajima
- Research Institute for Electronic Science, Hokkaido University, Hokkaido 001-0020, Japan
| | - K. Sasaki
- Research Institute for Electronic Science, Hokkaido University, Hokkaido 001-0020, Japan
| | - K. Tanaka
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
- Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Kyoto 606-8501, Japan
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Chebbi A, Sarafon-Vasseur S, Beaussire L, Blanchard F, Gobet F, Sabourin JC, Pfister C, Di Fiore F, Nouhaud FX. Étude de l’impact clinique des variations de copies de gènes identifiées pour un panel de gènes d’intérêt par droplet digital PCR chez des patients traités par thérapie ciblée pour un cancer du rein métastatique. Prog Urol 2019. [DOI: 10.1016/j.purol.2019.08.048] [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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Arif T, Cazorla C, Bogliotti N, Saleh N, Blanchard F, Gandon V, Métivier R, Xie J, Voituriez A, Marinetti A. Bimetallic gold(i) complexes of photoswitchable phosphines: synthesis and uses in cooperative catalysis. Catal Sci Technol 2018. [DOI: 10.1039/c7cy01614j] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [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
The first photoswitchable bimetallic gold catalysts based on an azobenzene backbone have been synthesized and their catalytic properties have been investigated.
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Mamone M, Gonçalves RSB, Blanchard F, Bernadat G, Ongeri S, Milcent T, Crousse B. N-Difluoromethyl-triazole as a constrained scaffold in peptidomimetics. Chem Commun (Camb) 2017; 53:5024-5027. [PMID: 28429026 DOI: 10.1039/c7cc01298e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The N-difluoromethyl triazolo-β-aza-ε-amino acid present in the core of peptides led to constrained conformations due to CH–F and NH–F interactions.
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Affiliation(s)
- M. Mamone
- Univ Paris-Sud
- BioCIS
- CNRS
- Faculté de Pharmacie
- 92290 Châtenay-Malabry
| | - R. S. B. Gonçalves
- Departamento de Química Orgânica
- Instituto de Química
- Universidade Federal do Rio de Janeiro
- Rio de Janeiro
- Brazil
| | - F. Blanchard
- Institut de Chimie des Substances Naturelles
- CNRS UPR 2301
- Univ. Paris-Sud
- Université Paris-Saclay
- 91198 Gif-sur-Yvette
| | - G. Bernadat
- Univ Paris-Sud
- BioCIS
- CNRS
- Faculté de Pharmacie
- 92290 Châtenay-Malabry
| | - S. Ongeri
- Univ Paris-Sud
- BioCIS
- CNRS
- Faculté de Pharmacie
- 92290 Châtenay-Malabry
| | - T. Milcent
- Univ Paris-Sud
- BioCIS
- CNRS
- Faculté de Pharmacie
- 92290 Châtenay-Malabry
| | - B. Crousse
- Univ Paris-Sud
- BioCIS
- CNRS
- Faculté de Pharmacie
- 92290 Châtenay-Malabry
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Sefrioui D, Vasseur N, Toure E, Blanchard F, Delacour J, Thill C, Beaussire L, Gillibert A, Ziegler F, Gangloff A, Bouhier-Leporrier K, Lefebvre AC, Parzy A, Gallais MP, Clatot F, Perdrix A, Sabourin JC, Frebourg T, Michel P, Di Fiore F. Prospective analysis of CEA, CA19.9, circulating DNA (cDNA) and circulating tumor cells (CTC) in patients (pts) treated for a metastatic colorectal cancer (mCRC)_Results of COCA-COLON study. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw363.19] [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: 11/14/2022] Open
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Sefrioui D, Blanchard F, Basile P, Toure E, Dolfus C, Beaussire L, Vasseur N, Perdrix A, Gangloff A, Schwarz L, Clatot F, Tuech JJ, Sabourin JC, Frebourg T, Michel P, Di Fiore F. Diagnostic performance of liquid biopsy for pancreatic solid lesion as alternative to endoscopic ultrasound-guided fine needle aspiration (EUS-FNA). Ann Oncol 2016. [DOI: 10.1093/annonc/mdw363.18] [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: 11/13/2022] Open
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Boutet MA, Bart G, Penhoat M, Amiaud J, Brulin B, Charrier C, Morel F, Lecron JC, Rolli-Derkinderen M, Bourreille A, Vigne S, Gabay C, Palmer G, Le Goff B, Blanchard F. Distinct expression of interleukin (IL)-36α, β and γ, their antagonist IL-36Ra and IL-38 in psoriasis, rheumatoid arthritis and Crohn's disease. Clin Exp Immunol 2016; 184:159-73. [PMID: 26701127 DOI: 10.1111/cei.12761] [Citation(s) in RCA: 190] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/19/2015] [Indexed: 12/11/2022] Open
Abstract
Interleukin (IL)-36α, IL-36β and IL-36γ are expressed highly in skin and are involved in the pathogenesis of psoriasis, while the antagonists IL-36Ra or IL-38, another potential IL-36 inhibitor, limit uncontrolled inflammation. The expression and role of IL-36 cytokines in rheumatoid arthritis (RA) and Crohn's disease (CD) is currently debated. Here, we observed that during imiquimod-induced mouse skin inflammation and in human psoriasis, expression of IL-36α, γ and IL-36Ra, but not IL-36β and IL-38 mRNA, was induced and correlated with IL-1β and T helper type 17 (Th17) cytokines (IL-17A, IL-22, IL-23, CCL20). In mice with collagen-induced arthritis and in the synovium of patients with RA, IL-36α, β, γ, IL-36Ra and IL-38 were all elevated and correlated with IL-1β, CCL3, CCL4 and macrophage colony-stimulating factor (M-CSF), but not with Th17 cytokines. In the colon of mice with dextran sulphate sodium-induced colitis and in patients with CD, only IL-36α, γ and IL-38 were induced at relatively low levels and correlated with IL-1β and IL-17A. We suggest that only a minor subgroup of patients with RA (17-29%) or CD (25%) had an elevated IL-36 agonists/antagonists ratio, versus 93% of patients with psoriasis. By immunohistochemistry, IL-36 cytokines were produced by various cell types in skin, synovium and colonic mucosa such as keratinocytes, CD68⁺ macrophages, dendritic/Langerhans cells and CD79α⁺ plasma cells. In primary cultures of monocytes or inflammatory macrophages (M1), IL-36β and IL-36Ra were produced constitutively, but IL-36α, γ and IL-38 were produced after lipopolysaccharide stimulation. These distinct expression profiles may help to explain why only subgroups of RA and CD patients have a potentially elevated IL-36 agonists/antagonists ratio.
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Affiliation(s)
- M-A Boutet
- INSERM, UMR 957, Nantes, France.,Laboratoire De Physiopathologie De La Résorption Osseuse, Faculté De Médecine, Université De Nantes, Nantes Atlantique Universités
| | - G Bart
- INSERM, UMR 957, Nantes, France.,Laboratoire De Physiopathologie De La Résorption Osseuse, Faculté De Médecine, Université De Nantes, Nantes Atlantique Universités.,Rheumatology Unit, Nantes University Hospital, Nantes, France
| | - M Penhoat
- INSERM, UMR 957, Nantes, France.,Laboratoire De Physiopathologie De La Résorption Osseuse, Faculté De Médecine, Université De Nantes, Nantes Atlantique Universités.,Rheumatology Unit, Nantes University Hospital, Nantes, France
| | - J Amiaud
- INSERM, UMR 957, Nantes, France.,Laboratoire De Physiopathologie De La Résorption Osseuse, Faculté De Médecine, Université De Nantes, Nantes Atlantique Universités
| | - B Brulin
- INSERM, UMR 957, Nantes, France.,Laboratoire De Physiopathologie De La Résorption Osseuse, Faculté De Médecine, Université De Nantes, Nantes Atlantique Universités
| | - C Charrier
- INSERM, UMR 957, Nantes, France.,Laboratoire De Physiopathologie De La Résorption Osseuse, Faculté De Médecine, Université De Nantes, Nantes Atlantique Universités
| | - F Morel
- EA 4331, University of Poitiers, Poitiers, France
| | - J-C Lecron
- EA 4331, University of Poitiers, Poitiers, France.,Service Immunologie/Inflammation, Poitiers University Hospital, Poitiers, France
| | | | - A Bourreille
- INSERM, UMR 913, Nantes, France.,Service d'Hépato-Gastroentérologie, Nantes University Hospital, Nantes, France
| | - S Vigne
- Division of Rheumatology, Department of Internal Medicine Specialties, University Hospitals of Geneva and Department of Pathology-Immunology, University of Geneva School of Medicine, Geneva, Switzerland
| | - C Gabay
- Division of Rheumatology, Department of Internal Medicine Specialties, University Hospitals of Geneva and Department of Pathology-Immunology, University of Geneva School of Medicine, Geneva, Switzerland
| | - G Palmer
- Division of Rheumatology, Department of Internal Medicine Specialties, University Hospitals of Geneva and Department of Pathology-Immunology, University of Geneva School of Medicine, Geneva, Switzerland
| | - B Le Goff
- INSERM, UMR 957, Nantes, France.,Laboratoire De Physiopathologie De La Résorption Osseuse, Faculté De Médecine, Université De Nantes, Nantes Atlantique Universités.,Rheumatology Unit, Nantes University Hospital, Nantes, France
| | - F Blanchard
- INSERM, UMR 957, Nantes, France.,Laboratoire De Physiopathologie De La Résorption Osseuse, Faculté De Médecine, Université De Nantes, Nantes Atlantique Universités
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Boutet MA, Bart G, Gahier M, Amiaud J, Brulin B, Charrier C, Morel F, Lecron JC, Rolli-Derkinderen M, Boureille A, Vigne S, Gabay C, Palmer G, Goff BL, Blanchard F. A7.13 Distinct expression of IL-36α, β, γ and their antagonists IL-36RA and IL-38 in psoriasis, rheumatoid arthritis (RA) and crohn’s disease (CD). Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-209124.144] [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: 11/03/2022]
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15
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Blanchard F, Ellart M, Rivenet M, Vigier N, Hablot I, Morel B, Grandjean S, Abraham F. Neodymium uranyl peroxide synthesis by ion exchange on ammonium uranyl peroxide nanoclusters. Chem Commun (Camb) 2016; 52:3947-50. [DOI: 10.1039/c5cc09527a] [Citation(s) in RCA: 17] [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] [Indexed: 11/21/2022]
Abstract
This study demonstrates the ability of ammonium uranyl peroxide nanoclusters U32R-NH4 to undergo exchange in between NH4+ and trivalent (Nd3+) or tetravalent (Th4+) cations in the solid state.
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Affiliation(s)
| | - M. Ellart
- Univ. Lille
- CNRS
- Centrale Lille
- ENSCL
- Univ. Artois
| | - M. Rivenet
- Univ. Lille
- CNRS
- Centrale Lille
- ENSCL
- Univ. Artois
| | - N. Vigier
- AREVA-NC
- TOUR AREVA
- 92084 Paris La Défense
- France
| | - I. Hablot
- AREVA-NC
- TOUR AREVA
- 92084 Paris La Défense
- France
| | - B. Morel
- AREVA-NC
- TOUR AREVA
- 92084 Paris La Défense
- France
| | - S. Grandjean
- CEA
- Marcoule Research Center
- DEN/DRCP/DIR
- F-30207 Bagnols sur Cèze
- France
| | - F. Abraham
- Univ. Lille
- CNRS
- Centrale Lille
- ENSCL
- Univ. Artois
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Beltran R, Nocquet-Thibault S, Blanchard F, Dodd RH, Cariou K. PIFA-mediated ethoxyiodination of enamides with potassium iodide. Org Biomol Chem 2016; 14:8448-8451. [DOI: 10.1039/c6ob01673a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The combination of PIFA with KI in ethanol triggers the regioselective ethoxyiodination of a broad range of enamides with excellent yields and diastereoselectivities.
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Affiliation(s)
- R. Beltran
- Institut de Chimie des Substances Naturelles
- CNRS UPR 2301
- Univ. P.-Sud
- Univ. Paris-Saclay
- 91198 Gif-sur-Yvette
| | - S. Nocquet-Thibault
- Institut de Chimie des Substances Naturelles
- CNRS UPR 2301
- Univ. P.-Sud
- Univ. Paris-Saclay
- 91198 Gif-sur-Yvette
| | - F. Blanchard
- Institut de Chimie des Substances Naturelles
- CNRS UPR 2301
- Univ. P.-Sud
- Univ. Paris-Saclay
- 91198 Gif-sur-Yvette
| | - R. H. Dodd
- Institut de Chimie des Substances Naturelles
- CNRS UPR 2301
- Univ. P.-Sud
- Univ. Paris-Saclay
- 91198 Gif-sur-Yvette
| | - K. Cariou
- Institut de Chimie des Substances Naturelles
- CNRS UPR 2301
- Univ. P.-Sud
- Univ. Paris-Saclay
- 91198 Gif-sur-Yvette
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de Boissieu P, Mahmoudi R, Hentzien M, Toquet S, Novella JL, Blanchard F, Jolly D, Dramé M. Predictors of Long-Term Mortality in Oldest Old Patients (90+) Hospitalized to Medical Wards via the Emergency Department: The SAFES Cohort. J Nutr Health Aging 2015; 19:702-7. [PMID: 26054508 DOI: 10.1007/s12603-015-0515-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [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: 10/23/2022]
Abstract
OBJECTIVES To identify risk factors for long-term mortality in patients aged 90 years and over who are admitted to hospital through the emergency department. DESIGN Prospective cohort study (SAFES cohort; Sujet Agé Fragile - Évaluation Suivi). SETTING 8 university teaching hospitals and one regional, non-academic hospital in France. PARTICIPANTS Among 1306 patients in the SAFES cohort, 291 patients aged 90 or over were included. MEASUREMENTS At inclusion, we recorded socio-demographic data (age, sex, level of education, living alone or in an institution, number of children, presence of helper/caregiver), and data from geriatric evaluation (dependence status, risk of depression, dementia, delirium, nutritional status, walking disorders, risk of falls, comorbidities, risk of pressure sores). Vital status at 36 months was obtained from the treating physician, the general practitioner, administrative registers, or during follow-up consultations. RESULTS Among 291 patients included, 190 (65.3%) had died at 36 months. Risk factors for mortality at 36 months identified by multivariate analysis were risk of malnutrition (HR 1.6, 95%CI 1.1-2.3, p=0.004) and delirium (HR 1.6, 95%CI 1.1-2.3, p=0.01). CONCLUSION Risk of malnutrition and presence of delirium are risk factors for mortality at 36 months in subjects aged 90 years and over hospitalized through the emergency department.
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Affiliation(s)
- P de Boissieu
- Moustapha Dramé, MD, MPH, PhD. Department of Research and Innovation. Reims University Hospitals, Avenue du Général Koenig, 51092 Reims cedex, France. Tel. +33 3 26 78 44 12, Fax. +33 3 26 83 25 89, E-mail.
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18
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Gahier M, Boutet M, Amiaud J, Heymann D, Blanchard F, Le Goff B. AB0127 Resolution of Inflammation is Associated with an Inversion of the Synovial Tissue M1/M2 Ratio in the Antigene-Induced Arthritis Model. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.3490] [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: 11/03/2022]
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19
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Dahany MM, Dramé M, Mahmoudi R, Novella JL, Ciocan D, Kanagaratnam L, Morrone I, Blanchard F, Nazeyrollas P, Barbe C, Jolly D. Factors associated with successful aging in persons aged 65 to 75 years. Eur Geriatr Med 2014. [DOI: 10.1016/j.eurger.2014.09.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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20
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Benevides E, Vallinoto M, Fetter Filho A, de Souza J, Silva-Oliveira G, Freitas M, Ferreira B, Hostim-Silva M, Bertoncini A, Blanchard F, Torres R. When physical oceanography meets population genetics: The case study of the genetic/evolutionary discontinuity in the endangered goliath grouper (Epinephelus itajara; Perciformes: Epinephelidae) with comments on the conservation of the species. BIOCHEM SYST ECOL 2014. [DOI: 10.1016/j.bse.2014.06.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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21
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Di Fiore F, Armengol-Debeir L, Blanchard F, Chapusot C, Tournier B, Sesboué R, Sefrioui D, Basile P, Gangloff A, Hebbar M, Copin M, Vasseur C, Tuech J, Vermeulin T, Houivet E, Frebourg T, Sabourin J, Lepage C, Michel P. A Bar Code of Selected Gene Copy Number Alterations is Associated with Disease-Free Survival in Stage Ii-Iii Microsatellite Stable (Mss) Colon Cancer. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu333.67] [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: 11/13/2022] Open
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22
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Basile P, Sefrioui D, Blanchard F, Lecleire S, Clatot F, Sabourin J, Michel P, Di Fiore F. Liquid Biopsy Based on Circulating Tumour Cells (Ctc) Detection is a Diagnostic and Prognostic Marker in Patients with Pancreatic Solid Tumours. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu326.63] [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: 11/14/2022] Open
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23
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Sefrioui D, Vasseur C, Sesboué R, Blanchard F, Gangloff A, Baretti M, Beaussire L, Clatot F, Dolfus C, Sabourin J, Michel P, Frebourg T, Di Fiore F. Clinical Interest of Digital Pcr for Routine Detection of Circulating Dna in Metastatic Colorectal Cancer. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu358.48] [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: 11/14/2022] Open
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Zulfiqar A, Mahmoudi R, Sebaux A, Bartolomeu D, Andres E, Blanchard F, Novella J. P333: Prospective study of hypervitaminosis B12 in acute geriatric unit: advance results. Eur Geriatr Med 2014. [DOI: 10.1016/s1878-7649(14)70497-8] [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: 10/24/2022]
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25
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Blanchard F, Ropagnol X, Hafez H, Razavipour H, Bolduc M, Morandotti R, Ozaki T, Cooke DG. Effect of extreme pump pulse reshaping on intense terahertz emission in lithium niobate at multimilliJoule pump energies. Opt Lett 2014; 39:4333-4336. [PMID: 25078170 DOI: 10.1364/ol.39.004333] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report on terahertz (THz) generation via optical rectification in a room-temperature lithium niobate crystal under variable pump pulse durations, ranging from 100 to 300 fs, at 800 nm center wavelength. The efficiency for the process is predicted to have an order of magnitude increase when longer duration Fourier-limited pump pulses are used. Our results confirm this increase in efficiency, and we report a record 800 nm pump energy conversion efficiency of 0.35% with a saturation at >240 fs pulse duration. While promising, our findings show a series of key problems that must be overcome before the theoretical limit can be achieved, including the influence of the pump bandwidth broadening due to the cascaded nonlinearity taking place within the crystal.
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Nouhaud FX, Rebibo JD, Blanchard F, Sabourin JC, Di Fiore F, Pfister C. Valeur pronostique de la toxicité induite par les thérapies ciblées dans le carcinome rénal métastatique. Prog Urol 2014; 24:563-71. [DOI: 10.1016/j.purol.2013.12.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Revised: 07/29/2013] [Accepted: 12/05/2013] [Indexed: 01/26/2023]
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Pohin M, Garnier J, Barrault C, Paris I, Atanassov H, Favot L, Bernard F, Richards C, Blanchard F, Lecron J, Morel F, Jégou J. L’oncostatine M, une cytokine importante dans l’inflammation cutanée. Ann Dermatol Venereol 2014. [DOI: 10.1016/j.annder.2014.04.130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Christelle DL, Boutet MA, Chatelais M, Brion R, Blanchard F, Heymann D, Le Goff B. THU0524 IL-1-β and Tnf-α Promote Monocyte Survival and Proliferation through the Induction of GM-CSF Expression by Rheumatoid Arthritis Synovial Fibroblasts. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.4649] [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: 11/03/2022]
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Blanchard F, Sumida K, Wolpert C, Tsotsalas M, Tanaka T, Doi A, Kitagawa S, Cooke DG, Furukawa S, Tanaka K. Terahertz phase contrast imaging of sorption kinetics in porous coordination polymer nanocrystals using differential optical resonator. Opt Express 2014; 22:11061-11069. [PMID: 24921804 DOI: 10.1364/oe.22.011061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The enhancement of light-matter coupling when light is confined to wavelength scale volumes is useful both for studying small sample volumes and increasing the overall sensing ability. At these length scales, nonradiative interactions are of key interest to which near-field optical techniques may reveal new phenomena facilitating next-generation material functionalities and applications. Efforts to develop novel chemical or biological sensors using metamaterials have yielded innovative ideas in the optical and terahertz frequency range whereby the spatially integrated response over a resonator structure is monitored via the re-radiated or leaked light. But although terahertz waves generally exhibit distinctive response in chemical molecules or biological tissue, there is little absorption for subwavelength size sample and therefore poor image contrast. Here, we introduce a method that spatially resolves the differential near-field phase response of the entire resonator as a spectral fingerprint. By simultaneously probing two metallic ring resonators, where one loaded with the sample of interest, the differential phase response is able to resolve the presence of guest molecules (e.g. methanol) as they are adsorbed or released within the pores of a prototypical porous coordination polymer.
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Lang PO, Mahmoudi R, Novella JL, Tardieu E, Bertholon LA, Nazeyrollas P, Blanchard F, Jolly D, Dramé M. Is obesity a marker of robustness in vulnerable hospitalized aged populations? Prospective, multicenter cohort study of 1 306 acutely ill patients. J Nutr Health Aging 2014; 18:66-74. [PMID: 24402392 DOI: 10.1007/s12603-013-0352-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
BACKGROUND The "obesity paradox" is poorly understood in vulnerable older hospitalized populations. OBJECTIVES To prospectively analyze the impact of body mass index (BMI) and comorbidities on early (6-week), one- and two-year mortality. DESIGN Prospective multicenter study with a two-year follow-up of old patients participating in the SAFES cohort study. SETTINGS Nine university hospitals in France. PARTICIPANTS Patients aged 75 or older hospitalized in medical divisions through the emergency department. MEASUREMENT Inpatients' characteristics were obtained through a comprehensive geriatric assessment of inpatients, conducted in the first week of hospitalization. All-cause mortalities at 6-week, one- and two-year were determined using bivariable and multivariable Cox proportional hazard model. RESULTS The SAFES cohort included 1,306 patients, aged 85±6 years, with a majority of women (65%). One- and two-year mortality were inversely associated with BMI ≥30 kg/m2 while early mortality was not, and positively associated with age, burden of comorbidities, walking disorders, level of dependency and presence of a dementia syndrome. Survival rates between patients in low (< 18.0 kg/m2) and intermediate (18-24.9 and 25-29.9 kg/m2) BMI categories were not significant. CONCLUSION While our findings seem to confirm the reality of the "obesity paradox" in vulnerable older hospitalized population, the exact understanding of underlying mechanisms and even the truthfulness of this paradoxical relationship are still fraught with considerable methodological, epidemiological and metabolic challenges.
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Affiliation(s)
- P-O Lang
- Pierre Olivier Lang, MD, MPH, PD, PhD. Nescens Centre of Preventive Medicine, Clinic of Genolier, Route du Muids, 3, CH-1272 Genolier, Switzerland, Phone: + 412236693 09 - fax: + 4122 36693 49-E-mail:
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Novella JL, Boyer F, Jochum C, Jovenin N, Morrone I, Jolly D, Bakchine S, Blanchard F. Health Status in Patients with Alzheimer’s Disease: An Investigation of Inter-rater Agreement. Qual Life Res 2013; 15:811-9. [PMID: 16721641 DOI: 10.1007/s11136-005-5434-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/23/2005] [Indexed: 10/24/2022]
Abstract
OBJECTIVE The purpose of the present study was to examine the level of agreement between health status ratings provided by patients with Alzheimer's disease and by their proxies. BACKGROUND Because proxy-completed responses are often necessary in assessing health outcomes for the elderly, it is necessary to determine the feasibility and potential limitations of using proxies as a patient substitutes. METHODS To assess the potential utility of proxy responses on health status when subjects present a cognitive impairment, this study compared the responses of 70 subjects with Alzheimer's disease and those of their family and/or care provider proxy using the SF-36. Agreement between proxies and patients was measured by intraclass correlation coefficients (ICCs). RESULTS The proportion of exact agreement between patients and proxies on the 36 items ranged from 3.3 to 41.7%. Results reveal poor to moderate agreement between patient and proxy reports. Proxy reliability varied according to the relationship of the proxy to the index subject. Agreement decreased significantly with increasing severity of dementia and with increasing severity of Physical status (Katz ADL). Agreement was better for measures of functions that are directly observable and relatively poor for more subjective measures. CONCLUSIONS Our results confirm the importance of the information source used for patient health status.
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Affiliation(s)
- J L Novella
- Department of Internal Medicine and Gerontology M4A, Hôpital Sébastopol, 51092, Reims Cedex, France.
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Nouhaud F, Blanchard F, Sesbouë R, Sabourin J, Pfister C, Di Fiore F. Développement d’un code barre moléculaire pronostique dans le cancer du rein métastatique basé sur la méthode QMPSF : résultats préliminaires. Prog Urol 2013. [DOI: 10.1016/j.purol.2013.08.059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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33
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Narbey D, Jolly D, Mahmoudi R, Trenque T, Blanchard F, Novella JL, Dramé M. Relationship between anticholinergic drug use and one-year outcome among elderly people hospitalised in medical wards via emergency department: the SAFES cohort study. J Nutr Health Aging 2013; 17:766-71. [PMID: 24154649 DOI: 10.1007/s12603-013-0349-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [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: 10/26/2022]
Abstract
AIM To investigate the relationship between anticholinergic drug use and one-year outcome of elderly patients hospitalised via the emergency department. METHODS Prospective, multicentre, cohort study of patients aged 75 years and older. Comprehensive geriatric evaluation was performed. We included in this analysis all patients for whom data on drug use was available. Anticholinergic drugs were coded using the online database "Thesorimed". One-year mortality and nursing home admission were analysed using a Cox model, with matching on the propensity to use anticholinergic drugs. RESULTS In total, 1176 subjects were included in this analysis, average age 85±6 years, 65% women. Overall, 144 (12%) were taking at least one anticholinergic drug. Mortality and nursing home admission at one year were respectively 29% and 30% in the anticholinergic group, and 34% and 33% respectively in subjects not taking anticholinergic drugs. No significant relationship was observed between anticholinergic drug use and the main endpoints. CONCLUSION Although we did not observed any statistically significant relationship between use of anticholinergic drugs and one-year outcome in elderly patients, the long-term use of anticholinergic drugs can have deleterious effects on memory and functional capacity, and therefore requires prescriptions to be reviewed regularly.
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Affiliation(s)
- D Narbey
- Moustapha Dramé, MD, MPH, PhD, Department of Geriatrics and Internal Medicine, Reims University Hospitals, Maison Blanche Hospital, 45 rue Cognacq Jay - 51092 Reims cedex, France, Telephone: + 33 3 26 78 44 12 - Fax: + 33 3 26 78 41 08, E-mail:
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Vanhaecke Collard C, Barbe C, Novella JL, Bertholon LA, Lacoste M, Blanchard F, Mahmoudi R. Impact of anemia on fatigue and quality of life of patients over 75 years. Eur Geriatr Med 2013. [DOI: 10.1016/j.eurger.2013.07.238] [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: 10/26/2022]
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Dramé M, Joachim C, Novella JL, Nazeyrollas P, Trenque T, Blanchard F, Jolly D, Mahmoudi R. Appropriateness of use of psychotropic drugs in elderly patients hospitalised in a short-stay ward. Eur Geriatr Med 2013. [DOI: 10.1016/j.eurger.2013.07.618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Dramé M, Joachim C, Jolly D, Nazeyrollas P, Blanchard F, Mahmoudi R, Novella JL. Use of psychotropic drugs in elderly patients admitted to a short-stay ward through the emergency department: The SAFES Cohort. Eur Geriatr Med 2013. [DOI: 10.1016/j.eurger.2013.07.619] [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: 10/26/2022]
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Blanchard F, Ooi K, Tanaka T, Doi A, Tanaka K. Near-field terahertz imaging of a discontinuity in split ring resonator array. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20134109006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Lamy A, Tournier I, Angot E, Blanchard F, Charbonnier F, Coutant S, Frébourg T, Sabourin JC. Évaluation de l’apport du séquençage haut débit à l’identification des altérations moléculaires d’intérêt théranostique dans les tumeurs. Ann Pathol 2012. [DOI: 10.1016/j.annpat.2012.09.117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Dramé M, Mahmoudi R, Sanchez S, Kanagaratnam L, Barbe C, Lang P, Blanchard F, Novella J, Jolly D. Six-month outcome of elderly people hospitalized via the emergency department: The Safes cohort. Eur Geriatr Med 2012. [DOI: 10.1016/j.eurger.2012.07.216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Dramé M, Mahmoudi R, Kanagaratnam L, Sanchez S, Barbe C, Blanchard F, Jolly D, Novella J. Social support and six-month outcome among elderly patients hospitalized via emergency department. Eur Geriatr Med 2012. [DOI: 10.1016/j.eurger.2012.07.215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Komlanvi K, Jolly D, Vanaecke C, Kanagaratnam L, Sanchez S, Mahmoudi R, Blanchard F, Novella J, Dramé M. Ability to predict six-month mortality and inter-tool agreement between four nutritional assessment instruments in the Safes cohort. Eur Geriatr Med 2012. [DOI: 10.1016/j.eurger.2012.07.217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Blanchard F, Ooi K, Tanaka T, Doi A, Tanaka K. Terahertz spectroscopy of the reactive and radiative near-field zones of split ring resonator. Opt Express 2012; 20:19395-19403. [PMID: 23038582 DOI: 10.1364/oe.20.019395] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A terahertz microscope has been used to excite and observe the resonant modes of a single split ring resonator in the reactive and radiative near-field zones. The two lowest resonant modes of an isolated split ring resonator with their corresponding radiation patterns are reported; they showed good agreement to simulations. The passage from the reactive to radiative near-field zone is also discussed. Further, our result introduced a novel technique to perform terahertz time-domain spectroscopy of samples a few tens of micrometers in size by measuring the in-plane radiative near-field zone.
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Affiliation(s)
- F Blanchard
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Sakyo-ku, Kyoto, Japan.
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Foguem C, Zulfigar A, Novella JL, Blanchard F. Septicémie hémorragique à Pasteurella stomatis avec atteinte méningée chez une femme de 82ans consécutive au léchage de jambes par un chat. Rev Med Interne 2012. [DOI: 10.1016/j.revmed.2012.03.220] [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: 10/28/2022]
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Dramé M, Lang PO, Novella JL, Narbey D, Mahmoudi R, Lanièce I, Somme D, Gauvain JB, Heitz D, Voisin T, de Wazières B, Gonthier R, Ankri J, Saint-Jean O, Jeandel C, Couturier P, Blanchard F, Jolly D. Six-month outcome of elderly people hospitalized via the emergency department: the SAFES cohort. Rev Epidemiol Sante Publique 2012; 60:189-96. [PMID: 22608011 DOI: 10.1016/j.respe.2011.11.004] [Citation(s) in RCA: 25] [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: 02/02/2011] [Revised: 11/14/2011] [Accepted: 11/22/2011] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND The objective of the study was to identify factors predictive of 6-month institutionalization or mortality in frail elderly patients after acute hospitalization. METHODS A prospective cohort of elderly subjects 75 years and older was set up in nine French teaching hospitals. Data obtained from a comprehensive geriatric assessment were used in a Cox model to predict 6-month institutionalization or mortality. Institutionalization was defined as incident admission either to a nursing home or other long-term care facility during the follow-up period. RESULTS Crude institutionalization and death rates after 6 months of follow-up were 18% and 24%, respectively. Independent predictors of institutionalization were: living alone (HR=1.83; 95% CI=1.27-2.62) or a higher number of children (HR=0.86; 95% CI=0.78-0.96), balance problems (HR=1.72; 95% CI=1.19-2.47), malnutrition or risk thereof (HR=1.93; 95% CI=1.24-3.01), and dementia syndrome (HR=1.88; 95% CI=1.32-2.67). Factors found to be independently related to 6-month mortality were exclusively medical factors: malnutrition or risk thereof (HR=1.92; 95% CI=1.17-3.16), delirium (HR=1.80; 95% CI=1.24-2.62), and a high level of comorbidity (HR=1.62; 95% CI=1.09-2.40). Institutionalization (HR=1.92; 95% CI=1.37-2.71) and unplanned readmission (HR=4.47; 95% CI=3.16-2.71) within the follow-up period were also found as independent predictors. CONCLUSION The main factors predictive of 6-month outcome identified in this study are modifiable by global and multidisciplinary interventions. Their early identification and management would make it possible to modify frail elderly subjects' prognosis favorably.
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Affiliation(s)
- M Dramé
- Université de Reims Champagne-Ardenne, faculté de médecine, EA 3797, 51, rue Cognacq-Jay, 51095 Reims cedex, France.
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Vanhaecke Collard C, Dramé M, Novella JL, Blanchard F, Pennaforte JL, Mahmoudi R. [Functional manifestations associated to corticosteroid therapy among the elderly]. Rev Med Interne 2012; 33:358-63. [PMID: 22564886 DOI: 10.1016/j.revmed.2012.04.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2011] [Revised: 02/20/2012] [Accepted: 04/02/2012] [Indexed: 10/28/2022]
Abstract
PURPOSE Corticosteroid therapy is frequently prescribed in the elderly with potentially significant consequences in this frail population. The objective of this study was to describe the functional manifestations associated and the preventive measures prescribed with corticosteroid therapy among patients over 75 years old. PATIENTS AND METHODS We conducted an exposed/non-exposed, prospective, multi-centre, observational study. Each exposed patient was sex and age (± 2 years) matched to two unexposed subjects. The sample included patients aged over 75 years treated with long-term corticosteroid therapy and hospitalized in an acute geriatric unit between June 2006 and November 2009. Sociodemographic and geriatric characteristics, history of corticosteroid therapy, clinical manifestations and preventive measures prescribed were collected. RESULTS Fifty exposed and 100 unexposed patients were included. Mean age was 85±6 years. Prevalence of falls, osteoarticular complications, amyotrophy, vertebral fractures, lipodystrophy, purpura, hematomas and cataracts, and the number of medications were higher among patients taking corticosteroid therapy than in controls. Preventive measures were more often prescribed to patients under taking corticosteroid therapy (calcium and vitamin supplementation, potassium supplementation, anti-osteoporosis medication and gastroprotective agents). CONCLUSION Functional manifestations associated with corticosteroid therapy are frequent among the elderly and may have serious consequences in this frail population. Attention should be paid to the prescription of preventive measures through comprehensive care.
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Affiliation(s)
- C Vanhaecke Collard
- Service de médecine interne et gérontologie clinique, hôpital Maison-Blanche, CHU de Reims, 45, avenue Cognacq-Jay, 51092 Reims cedex, France.
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Cavalcante PA, Sehili MA, Herbin M, Istrate D, Blanchard F, Boudy J, Dorizzi B. First steps in adaptation of an evidential network for data fusion in the framework of medical remote monitoring. Annu Int Conf IEEE Eng Med Biol Soc 2012; 2012:2044-2047. [PMID: 23366321 DOI: 10.1109/embc.2012.6346360] [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: 06/01/2023]
Abstract
This paper presents a medical remote monitoring application which aims at detecting falls. The detection system is based on three modalities: a wearable sensor, infrared sensors and a sound analysis module. The sound analysis is presented briefly. The multimodal fusion is made using the Dempster Schaffer theory through Evidential Network. A first evaluation of the use of data mining techniques in order to extract blindly data representatives is proposed. These representatives are used to continuously increase the system performances. The system is evaluated on a local recorded data base.
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Lamy A, Sesboüé R, Veresezan L, Bota S, Blanchard F, Thiberville L, Sabourin JC. Valeur prédictive de réponse aux TKI des mutations « rares » du domaine tyrosine kinase de l’EGFR dans les adénocarcinomes du poumon : étude préliminaire. Ann Pathol 2011. [DOI: 10.1016/j.annpat.2011.09.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Chemel M, Le Goff B, Brion R, Cozic C, Berreur M, Amiaud J, Bougras G, Touchais S, Blanchard F, Heymann MF, Berthelot JM, Verrecchia F, Heymann D. Interleukin 34 expression is associated with synovitis severity in rheumatoid arthritis patients. Ann Rheum Dis 2011; 71:150-4. [PMID: 22039170 DOI: 10.1136/annrheumdis-2011-200096] [Citation(s) in RCA: 110] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
OBJECTIVES Interleukin (IL) 34 is a new cytokine implicated in macrophage differentiation and osteoclastogenesis. This study assessed IL-34 expression in the tissue of patients with rheumatoid arthritis (RA). METHODS Immunohistochemistry was performed in synovial biopsies from patients with RA (n=20), osteoarthritis (n=3) or other inflammatory arthritis (n=4). IL-34 was detected in the synovial fluid by ELISA and its messenger RNA expression was studied by quantitative PCR in rheumatoid synovial fibroblasts after stimulation by tumour necrosis factor α (TNFα) and IL-1β. Wild-type, jnk1(-/-)-jnk2(-/-) and nemo(-/-) murine fibroblasts and pharmacological inhibition were used to determine the involvement of nuclear factor kappa B (NF-κB) and JNK in that effect. RESULTS IL-34 was expressed in 24/27 biopsies, with three samples from RA patients being negative. A significant association was found between IL-34 expression and synovitis severity. Levels of IL-34 and the total leucocyte count in synovial fluid were correlated. TNFα and IL-1β stimulated IL-34 expression by synovial fibroblasts in a dose/time-dependent manner through the NF-κB and JNK pathway. CONCLUSION This work for the first time identifies IL-34 expression in the synovial tissue of patients with arthritis. This cytokine, as a downstream effector of TNFα and IL-1β, may contribute to inflammation and bone erosions in RA.
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Blanchard F, Golde D, Su FH, Razzari L, Sharma G, Morandotti R, Ozaki T, Reid M, Kira M, Koch SW, Hegmann FA. Effective mass anisotropy of hot electrons in nonparabolic conduction bands of n-doped InGaAs films using ultrafast terahertz pump-probe techniques. Phys Rev Lett 2011; 107:107401. [PMID: 21981526 DOI: 10.1103/physrevlett.107.107401] [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: 10/29/2010] [Revised: 04/20/2011] [Indexed: 05/31/2023]
Abstract
The anisotropic effective mass of energetic electrons in an isotropic, nonparabolic conduction band is revealed using ultrafast THz-pump-THz-probe techniques in a n-doped InGaAs semiconductor thin film. A microscopic theory is applied to identify the origin of the observed anisotropy and to show that the self-consistent light-matter coupling contributes significantly to the THz response.
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Affiliation(s)
- F Blanchard
- INRS-EMT, Advanced Laser Light Source, Université du Québec, Varennes, Québec J3X 1S2, Canada
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Dramé M, Novella JL, Jolly D, Lanièce I, Somme D, Heitz D, Gauvain JB, Voisin T, De Wazières B, Gonthier R, Jeandel C, Couturier P, Saint-Jean O, Ankri J, Blanchard F, Lang PO. Rapid cognitive decline, one-year institutional admission and one-year mortality: analysis of the ability to predict and inter-tool agreement of four validated clinical frailty indexes in the SAFEs cohort. J Nutr Health Aging 2011; 15:699-705. [PMID: 21968868 DOI: 10.1007/s12603-011-0164-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
OBJECTIVES To evaluate the predictive ability of four clinical frailty indexes as regards one-year rapid cognitive decline (RCD - defined as the loss of at least 3 points on the MMSE score), and one-year institutional admission (IA) and mortality respectively; and to measure their agreement for identifying groups at risk of these severe outcomes. DESIGN One-year follow-up and multicentre study of old patients participating in the SAFEs cohort study. SETTING Nine university hospitals in France. PARTICIPANTS 1,306 patients aged 75 or older (mean age 85±6 years; 65% female) hospitalized in medical divisions through an Emergency department. MEASUREMENTS Four frailty indexes (Winograd; Rockwood; Donini; and Schoevaerdts) reflecting the multidimensionality of the frailty concept, using an ordinal scoring system able to discriminate different grades of frailty, and constructed based on the accumulation of identified deficits after comprehensive geriatric assessment conducted during the first week of hospital stay, were used to categorize participants into three different grades of frailty: G1 - not frail; G2 - moderately frail; and G3 - severely frail. Comparisons between groups were performed using Fisher's exact test. Agreement between indexes was evaluated using Cohen's Kappa coefficient. RESULTS All patients were classified as frail by at least one of the four indexes. The Winograd and Rockwood indexes mainly classified subjects as G2 (85% and 96%), and the Donini and Schoevaerdts indexes mainly as G3 (71% and 67%). Among the SAFEs cohort population, 250, 1047 and 1,306 subjects were eligible for analyses of predictability for RCD, 1-year IA and 1-year mortality respectively. At 1 year, 84 subjects (34%) experienced RCD, 377 (36%) were admitted into an institutional setting, and 445 (34%) had died. With the Rockwood index, all subjects who experienced RCD were classified in G2; and in G2 and G3 when the Donini and Schoevaerdts indexes were used. No significant difference was found between frailty grade and RCD, whereas frailty grade was significantly associated with an increased risk of IA and death, whatever the frailty index considered. Agreement between the different indexes of frailty was poor with Kappa coefficients ranging from -0.02 to 0.15. CONCLUSION These findings confirm the poor clinimetric properties of these current indexes to measure frailty, underlining the fact that further work is needed to develop a better and more widely-accepted definition of frailty and therefore a better understanding of its pathophysiology.
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Affiliation(s)
- M Dramé
- University of Reims Champagne-Ardenne, Faculty of Medicine, É.A 3797, Reims, F-51092, France
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