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Richard M, Barrois R, Desguerre I, Deladrière E, Leloup-Germa V, Barnerias C, Gitiaux C. Correlations between clinical motor scores and CMAP in patients with type 2 spinal muscular amyotrophy treated with nusinersen. Arch Pediatr 2024; 31:26-31. [PMID: 37989659 DOI: 10.1016/j.arcped.2023.08.011] [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: 09/13/2022] [Revised: 04/23/2023] [Accepted: 08/21/2023] [Indexed: 11/23/2023]
Abstract
BACKGROUND Spinal muscular atrophy (SMA) is a neuromuscular disorder characterized by the degeneration of the anterior horn cells of the spinal cord. Nusinersen for the treatment of SMA has been covered by public healthcare in France since May 2017. OBJECTIVE Our aim was to investigate whether there is a correlation between clinical and compound motor action potential (CMAP) measurements in SMA patients treated with nusinersen after 3 years' follow-up. METHOD Motor skills were evaluated regularly between M0 and M36 using the Motor Function Measure (MFM) score. CMAP measurements were collected regularly between M0 and M22. RESULTS Data for 10 patients with SMA type 2 were collected and divided into two age groups (< 5 years and > 5 years). Motor function improved, but not significantly, regarding distal motor skills (D3) in both groups, and in axial and proximal motor function (D2) in the younger group. CMAP measurements improved in all patients. CMAP increased significantly for the median nerve, and this improvement correlated significantly with global MFM and with axial and proximal tone (D2). CONCLUSION Our study shows gain in distal motor function with nusinersen, especially in younger patients with SMA type 2. These results encourage the screening of SMA patients and treatment as early as possible. CMAP measurements of the median nerve show clear improvement in patients treated with nusinersen and could be performed as routine follow-up.
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Affiliation(s)
- M Richard
- Centre de référence des pathologies neuromusculaires Paris-Nord-Est, AP-AH, Hôpital Necker Enfants Malades, Paris, France.
| | - R Barrois
- Centre de référence des pathologies neuromusculaires Paris-Nord-Est, AP-AH, Hôpital Necker Enfants Malades, Paris, France
| | - I Desguerre
- Centre de référence des pathologies neuromusculaires Paris-Nord-Est, AP-AH, Hôpital Necker Enfants Malades, Paris, France
| | - E Deladrière
- Centre de référence des pathologies neuromusculaires Paris-Nord-Est, AP-AH, Hôpital Necker Enfants Malades, Paris, France
| | - V Leloup-Germa
- Centre de référence des pathologies neuromusculaires Paris-Nord-Est, AP-AH, Hôpital Necker Enfants Malades, Paris, France
| | - C Barnerias
- Centre de référence des pathologies neuromusculaires Paris-Nord-Est, AP-AH, Hôpital Necker Enfants Malades, Paris, France
| | - C Gitiaux
- Centre de référence des pathologies neuromusculaires Paris-Nord-Est, AP-AH, Hôpital Necker Enfants Malades, Paris, France; Service d'explorations fonctionnelles, unité de Neurophysiologie Clinique, AP-HP, Hôpital Necker Enfants Malades, Paris, France
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Richard M, Pop A, Hager H, Leven F, Mansourati J. Is cardiac magnetic resonance of additional help in premature ventricular contraction work-up? Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.332] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Premature ventricular contractions (PVCs) are common in routine medical practice. PVCs are commonly asymptomatic but can also result in palpitations, dyspnea, presyncope or PVC-induced cardiomyopathy that may lead to sudden death. Cardiovascular magnetic resonance (CMR) provides morphological, functional, and tissue characterization in a single setting. CMR imaging proved to reliably identify fibrotic lesions and, hence, has developed into a valuable tool for etiological orientation in patients with PVCs.
Objectives
The aims of this study were: 1) to evaluate which ventricular arrythmia (VA) characteristics predicted CMR abnormalities and 2) the diagnostic yield and the impact in the management of CMR-based imaging versus non-CMR-based imaging in patients referred for PVCs.
Methods
This monocentric retrospective study was conducted in patients with PVCs referred for CMR imaging. Their baseline interview and characteristics, physical examination, surface electrocardiogram (ECG) analysis, ambulatory monitoring, echocardiography and treadmill exercise test data were collected when they were available. The CMR (1,5 T and 3.0 T) protocol included cine imaging and late gadolinium enhancement (LGE) using standard cardiac geometries.
Results
We analyzed 168 patients (65% males, mean age 54.2±16.8 years) referred to our center for PVCs over a two-year period. CMR reported abnormal findings in 73 patients (43.5%) with the diagnosis of structural heart disease (SHD) in 46 patients (27.4%). Left-ventricular late gadolinium-enhancement was documented in 43 patients with abnormal CMR. Using a multivariate analysis, age (p=0.026), sustained ventricular tachycardia (p=0.002) and presence of cardiomyopathy on echocardiography (p<0.001) significantly predicted the presence of abnormal findings on CMR. Compared to non-CMR-based imaging, CMR had a diagnostic yield, by modifying the presumed diagnosis or by finding abnormalities requiring follow-up in 73 patients (43.5%).
Conclusions
Age, sustained ventricular tachycardia and presence of cardiomyopathy on echocardiography were the strongest predictors of positive CMR imaging results. Although echocardiography is generally used in first intention for the diagnosis of cardiomyopathy in patients with PVCs, this study showed that CMR-based imaging has a robust diagnostic yield in this indication.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- M Richard
- University Hospital of Brest , Brest , France
| | - A Pop
- University Hospital of Brest , Brest , France
| | - H Hager
- University Hospital of Brest , Brest , France
| | - F Leven
- University Hospital of Brest , Brest , France
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Pochitaloff M, Miranda M, Richard M, Chaiyasitdhi A, Takagi Y, Cao W, De La Cruz EM, Sellers JR, Joanny JF, Jülicher F, Blanchoin L, Martin P. Flagella-like beating of actin bundles driven by self-organized myosin waves. Nat Phys 2022; 18:1240-1247. [PMID: 37396880 PMCID: PMC10312380 DOI: 10.1038/s41567-022-01688-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Accepted: 06/23/2022] [Indexed: 07/04/2023]
Abstract
Wave-like beating of eukaryotic cilia and flagella-threadlike protrusions found in many cells and microorganisms-is a classic example of spontaneous mechanical oscillations in biology. This type of self-organized active matter raises the question of the coordination mechanism between molecular motor activity and cytoskeletal filament bending. Here we show that in the presence of myosin motors, polymerizing actin filaments self-assemble into polar bundles that exhibit wave-like beating. Importantly, filament beating is associated with myosin density waves initiated at twice the frequency of the actin-bending waves. A theoretical description based on curvature control of motor binding to the filaments and of motor activity explains our observations in a regime of high internal friction. Overall, our results indicate that the binding of myosin to actin depends on the actin bundle shape, providing a feedback mechanism between the myosin activity and filament deformations for the self-organization of large motor filament assemblies.
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Affiliation(s)
- Marie Pochitaloff
- Laboratoire Physico-Chimie Curie, Institut Curie, Université PSL, Sorbonne Université, CNRS UMR168, Paris, France
- Present address: Department of Mechanical Engineering, UC Santa Barbara, Santa Barbara, CA, USA
| | - Martin Miranda
- Max Planck Institute for the Physics of Complex Systems, Dresden, Germany
| | - Mathieu Richard
- Laboratoire Physico-Chimie Curie, Institut Curie, Université PSL, Sorbonne Université, CNRS UMR168, Paris, France
| | - Atitheb Chaiyasitdhi
- Laboratoire Physico-Chimie Curie, Institut Curie, Université PSL, Sorbonne Université, CNRS UMR168, Paris, France
| | - Yasuharu Takagi
- Laboratory of Molecular Physiology, National Heart, Lung and Blood Institute, NIH, Bethesda, MD, USA
| | - Wenxiang Cao
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT, USA
| | - Enrique M. De La Cruz
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT, USA
| | - James R. Sellers
- Laboratory of Molecular Physiology, National Heart, Lung and Blood Institute, NIH, Bethesda, MD, USA
| | - Jean-François Joanny
- Laboratoire Physico-Chimie Curie, Institut Curie, Université PSL, Sorbonne Université, CNRS UMR168, Paris, France
- Collège de France, Paris, France
| | - Frank Jülicher
- Max Planck Institute for the Physics of Complex Systems, Dresden, Germany
- Cluster of Excellence Physics of Life, Technische Universität Dresden, Dresden, Germany
| | - Laurent Blanchoin
- CytomorphoLab, Biosciences and Biotechnology Institute of Grenoble, Laboratoire de Physiologie Cellulaire & Végétale, Université Grenoble-Alpes/CEA/CNRS/INRA, Grenoble, France
- CytomorphoLab, Hôpital Saint Louis, Institut Universitaire d’Hématologie, UMRS1160, INSERM/AP-HP/Université Paris Diderot, Paris, France
| | - Pascal Martin
- Laboratoire Physico-Chimie Curie, Institut Curie, Université PSL, Sorbonne Université, CNRS UMR168, Paris, France
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Curmin R, Guillo S, De Rycke Y, Bachelez H, Beylot-Barry M, Beneton N, Olivier C, Dupuy A, Joly P, Jullien D, Richard M, Viguier M, Sbidian E, Paul C, Mahé E, Tubach F. Switchs de biothérapies chez les patients atteints de psoriasis modéré à sévère dans la cohorte française PSOBIOTEQ. Rev Epidemiol Sante Publique 2022. [DOI: 10.1016/j.respe.2022.03.019] [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] Open
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Boccar S, Rubay R, Richard M, Reper P, Horlait G, Goussen A, De Moor V, Bulpa P. Unusual cause of obstructive shock following esophagectomy: a case report. Acta Anaest Belg 2021. [DOI: 10.56126/72.4.5] [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: 11/24/2022]
Abstract
Obstructive shock usually has an intrathoracic origin, such as pneumothorax, pericardial tamponade or pulmonary embolism. We report a case of hemo- dynamic shock in a 74-year-old patient four days after esophagectomy, just after the start of mechanical ventilation for bilateral pneumonia. The sudden onset of severe abdominal distension and the presence of air in the intra-abdominal drain suggested tension pneumoperitoneum, confirmed by radiography. No pneumothorax was associated. Urgent decompression was required to improve hemodynamics. Perforation of the gastrointestinal tract was ruled out. The cause was a bronchopleural fistula opened by mechanical ventilation. Rarely, cardiorespiratory failure may occur after tension pneumoperitoneum by reducing lung volume and cardiac preload, similar to obstructive shock from the usual intrathoracic causes or acting as an abdominal compartment syndrome (ACS). Its recognition and abdominal decompression are key steps in the patient’s recovery. Tension pneumoperitoneum related to mechanical ventilation and airway injury without associated pneumothorax is exceptional and, to our knowledge, has never been reported as a postoperative complication of esophagectomy.
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Dismer AM, Charles M, Dear N, Louis-Jean JM, Barthelemy N, Richard M, Morose W, Fitter DL. Identification of TB space-time clusters and hotspots in Ouest département, Haiti, 2011-2016. Public Health Action 2021; 11:101-107. [PMID: 34159071 DOI: 10.5588/pha.20.0085] [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: 12/19/2020] [Accepted: 03/08/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Haiti has the highest incidence rate of TB in the Western Hemisphere, with an estimated 170 cases per 100,000 in 2019. Since 2010, control efforts have focused on targeted case-finding activities in urban areas, implementation of rapid molecular diagnostics at high-volume TB centers, and improved reporting. TB analyses are rarely focused on lower geographic units; thus, the major goal was to determine if there were focal areas of TB transmission from 2011 to 2016 at operational geographic levels useful for the National TB Control Program (PNLT). METHODS We created a geocoder to locate TB cases at the smallest geographic level. Kulldorff's space-time permutation scan, Anselin Moran's I, and Getis-Ord Gi* statistics were used to determine the spatial distribution and clusters of TB. RESULTS With 91% of cases linked using the geocoder, TB clusters were identified each year. Getis-Ord Gi* analysis revealed 14 distinct spatial clusters of high incidences in the Port-au-Prince metropolitan area. One hundred retrospective space-time clusters were detected. CONCLUSION Our study confirms the presence of TB hotspots in the Ouest département, with most clusters in the Port-au-Prince metropolitan area. Results will help the PNLT and its partners better design case-finding strategies for these areas.
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Affiliation(s)
- A M Dismer
- Centers for Disease Control and Prevention (CDC), Atlanta, GA, USA
| | | | - N Dear
- CDC, Port-au-Prince, Haiti
| | - J M Louis-Jean
- Programme National de Lutte contre la Tuberculose, Ministère de la Santé Publique et de la Population, Port-au-Prince, Haiti
| | - N Barthelemy
- Directorate of Epidemiology, Laboratory, and Research, Ministère de la Santé Publique et de la Population, Port-au-Prince, Haiti
| | - M Richard
- Programme National de Lutte contre la Tuberculose, Ministère de la Santé Publique et de la Population, Port-au-Prince, Haiti
| | - W Morose
- Programme National de Lutte contre la Tuberculose, Ministère de la Santé Publique et de la Population, Port-au-Prince, Haiti
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Schröder E, Jamart J, Eucher P, Guédès A, Louagie Y, Mbende C, Michaux I, Macq A, Guillaume L, Richard M, Dahin G, Cuvelier N, Lusuka R, Buche M. Temporal changes of short and long-term outcome after aortic valve replacement. Archives of Cardiovascular Diseases Supplements 2021. [DOI: 10.1016/j.acvdsp.2020.10.173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Font G, Staumont-Salle D, Oro S, Seta V, Dupin N, Richard M, Jeudy G, Mallet S, Alexandre M, Le Roux-Villet C, Joly P, Prost-Squarcioni C, Duvert-Lehembre S. Efficacité du rituximab dans les maladies à IgA linéaire : une cohorte rétrospective. Ann Dermatol Venereol 2020. [DOI: 10.1016/j.annder.2020.09.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Seung KJ, Khan U, Varaine F, Ahmed S, Bastard M, Cloez S, Damtew D, Franke MF, Herboczek K, Huerga H, Islam S, Karakozian H, Khachatryan N, Kliesckova J, Khan AJ, Khan M, Khan P, Kotrikadze T, Lachenal N, Lecca L, Lenggogeni P, Maretbayeva S, Melikyan N, Mesic A, Mitnick CD, Mofolo M, Perrin C, Richard M, Tassew YM, Telnov A, Vilbrun SC, Wanjala S, Rich ML, Hewison C. Introducing new and repurposed TB drugs: the endTB experience. Int J Tuberc Lung Dis 2020; 24:1081-1086. [PMID: 33126943 DOI: 10.5588/ijtld.20.0141] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
In 2015, the initiative Expand New Drug Markets for TB (endTB) began, with the objective of reducing barriers to access to the new and repurposed TB drugs. Here we describe the major implementation challenges encountered in 17 endTB countries. We provide insights on how national TB programmes and other stakeholders can scale-up the programmatic use of new and repurposed TB drugs, while building scientific evidence about their safety and efficacy. For any new drug or diagnostic, multiple market barriers can slow the pace of scale-up. During 2015-2019, endTB was successful in increasing the number of patients receiving new and repurposed TB drugs in 17 countries. The endTB experience has many lessons, which are relevant to country level introduction of new TB drugs, as well as non-TB drugs and diagnostics. For example: the importation of TB drugs is possible even in the absence of registration; emphasis on good clinical monitoring is more important than pharmacovigilance reporting; national guidelines and expert committees can both facilitate and hinder innovative practice; clinicians use new and repurposed TB drugs when they are available; data collection to generate scientific evidence requires financial and human resources; pilot projects can drive national scale-up.
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Affiliation(s)
- K J Seung
- Partners In Health (PIH), Brigham and Women´s Hospital, Harvard Medical School, Boston, MA, USA
| | - U Khan
- Interactive Research and Development (IRD) Global, Singapore
| | - F Varaine
- Médecins Sans Frontières (MSF), Paris, France
| | | | - M Bastard
- Field Epidemiology Department, Epicentre, Paris, France
| | - S Cloez
- Médecins Sans Frontières (MSF), Paris, France
| | - D Damtew
- Ministry of Health, Addis Ababa, Ethiopia
| | - M F Franke
- Department of Global Health and Social Medicine, Harvard Medical School, PIH, Boston, MA, USA
| | | | - H Huerga
- Field Epidemiology Department, Epicentre, Paris, France
| | | | | | | | | | - A J Khan
- Interactive Research and Development (IRD) Global, Singapore
| | - M Khan
- IRD, Durban, South Africa
| | - P Khan
- Interactive Research and Development (IRD) Global, Singapore
| | | | | | | | | | | | - N Melikyan
- Field Epidemiology Department, Epicentre, Paris, France
| | | | - C D Mitnick
- Department of Global Health and Social Medicine, Harvard Medical School, PIH, Boston, MA, USA
| | | | - C Perrin
- Médecins Sans Frontières (MSF), Paris, France
| | - M Richard
- Programme national de Lutte contre la Tuberculose, Ministère de la Santé Publique et de la Population, Port-au-Prince, Haiti
| | | | | | - S C Vilbrun
- Groupe Haitien d´Etudes du Sarcome de Kaposi et des Infections Opportunistes, Port-au-Prince, Haiti
| | | | - M L Rich
- Partners In Health (PIH), Brigham and Women´s Hospital, Harvard Medical School, Boston, MA, USA
| | - C Hewison
- Médecins Sans Frontières (MSF), Paris, France
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Smillie RW, Williams MA, Richard M, Cosker T. Producing three-dimensional printed models of the hepatobiliary system from computed tomography imaging data. Ann R Coll Surg Engl 2020; 103:41-46. [PMID: 32964727 DOI: 10.1308/rcsann.2020.0191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
INTRODUCTION Macroscopic anatomy has traditionally been taught using cadaveric material, lectures and a variety of additional resources including online modules and anatomical models. Traditional plastic models are effective educational tools yet they have significant drawbacks such as a lack of anatomical detail, a lack of texturisation and cost. Three-dimensional printed models stand to solve these problems and widen access to high-quality anatomical teaching. This paper outlines the use of three-dimensional multiplanar imaging (computed tomography) in the development of an accurate model of the hepatobiliary system. MATERIALS AND METHODS Computed tomography scans were used to construct a virtual three-dimensional model of the hepatobiliary system. This was printed locally as a full-size colour model. We give a complete account of the process and software used. DISCUSSION This study is among the first of a series in which we will document the newly formed Oxford Library of Anatomy. This series will provide the methodology for the production of three-dimensional models from computed tomography and magnetic resonance imaging scans, and the library will provide a complete collection of the most complex anatomical areas. We hope that these models will form an important adjunct in teaching anatomy to medical students and surgical trainees.
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Affiliation(s)
- R W Smillie
- Department of Physiology, Anatomy and Genetics, Oxford, UK
| | - M A Williams
- Department of Physiology, Anatomy and Genetics, Oxford, UK
| | - M Richard
- 3D LifePrints, Nuffield Orthopaedic Centre, Oxford, UK
| | - T Cosker
- Department of Physiology, Anatomy and Genetics, Oxford, UK
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Richard M, Delannoy V, Courrege J, Chkair S, Leguelinel-Blache G. Optimisation de la prise en charge de la plaie post-chirurgicale par une équipe pluridisciplinaire : étude pilote de faisabilité. Annales Pharmaceutiques Françaises 2020; 78:435-446. [DOI: 10.1016/j.pharma.2020.07.006] [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] [Received: 01/10/2020] [Revised: 06/14/2020] [Accepted: 07/29/2020] [Indexed: 11/28/2022]
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Gordo I, Hubers M, Bird FG, Camarasa JJ, Richard M, de Vicente F, Vallefuoco R, Brissot HN. Feasibility of the single-incision subxiphoid approach for video-assisted thoracoscopic surgery in dogs. J Small Anim Pract 2020; 61:480-486. [PMID: 32678458 DOI: 10.1111/jsap.13174] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2019] [Revised: 04/25/2020] [Accepted: 05/07/2020] [Indexed: 12/28/2022]
Abstract
OBJECTIVES To report early results of uniportal video-assisted thoracoscopic surgery in dogs using a single-incision subxiphoid approach. MATERIALS AND METHODS Retrospective study of 10 client-owned dogs with: pyothorax (n=5), pericardial effusion (n=2), bilateral pneumothorax (n=1), retained surgical swab (n=1), cranial mediastinal mass (n=1). With the dog in dorsal recumbency a 3-4 cm incision was made over the xiphoid process. After resection of the xiphoid process, a tunnel was created towards the pleura and open access maintained with an Alexis™ wound retractor. The pleural cavity was explored with a 10 mm 30° or 5 mm 0° telescope and straight laparoscopic instruments. RESULTS Median surgical time was 75 minutes. The SISA technique was performed successfully in five of 10 cases and allowed easy and adequate inspection of the intra-thoracic structures. One case was converted to lateral thoracotomy after laceration of the vena cava and one converted to median sternotomy because of adhesions. An additional port was placed in three cases to facilitate triangulation and surgical manipulation. No other intra-operative complications were encountered. CLINICAL SIGNIFICANCE In this initial report of uniportal thoracic approach in dogs, this technique allowed excellent access and treatment of mediastinal structures. Further cases are required to assess its suitability for pulmonary surgery.
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Affiliation(s)
- I Gordo
- Surgery Department, Pride Veterinary Centre, Derby, DE24 8HX, UK
| | - M Hubers
- Surgery Department, Medisch Centrum voor Dieren, 45 1014, Amsterdam, Netherlands
| | - F G Bird
- Surgery Department, Pride Veterinary Centre, Derby, DE24 8HX, UK
| | - J J Camarasa
- Surgery Department, Pride Veterinary Centre, Derby, DE24 8HX, UK
| | - M Richard
- Surgery Department, Pride Veterinary Centre, Derby, DE24 8HX, UK
| | - F de Vicente
- Surgery Department, Pride Veterinary Centre, Derby, DE24 8HX, UK.,Surgery Department, Puchol Veterinary Hospital, 28050, Madrid, Spain
| | - R Vallefuoco
- Surgery Department, Pride Veterinary Centre, Derby, DE24 8HX, UK
| | - H N Brissot
- Surgery Department, Pride Veterinary Centre, Derby, DE24 8HX, UK
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Richard M, Blanch-Mercader C, Ennomani H, Cao W, De La Cruz EM, Joanny JF, Jülicher F, Blanchoin L, Martin P. Active cargo positioning in antiparallel transport networks. Proc Natl Acad Sci U S A 2019; 116:14835-14842. [PMID: 31289230 PMCID: PMC6660773 DOI: 10.1073/pnas.1900416116] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Cytoskeletal filaments assemble into dense parallel, antiparallel, or disordered networks, providing a complex environment for active cargo transport and positioning by molecular motors. The interplay between the network architecture and intrinsic motor properties clearly affects transport properties but remains poorly understood. Here, by using surface micropatterns of actin polymerization, we investigate stochastic transport properties of colloidal beads in antiparallel networks of overlapping actin filaments. We found that 200-nm beads coated with myosin Va motors displayed directed movements toward positions where the net polarity of the actin network vanished, accumulating there. The bead distribution was dictated by the spatial profiles of local bead velocity and diffusion coefficient, indicating that a diffusion-drift process was at work. Remarkably, beads coated with heavy-mero-myosin II motors showed a similar behavior. However, although velocity gradients were steeper with myosin II, the much larger bead diffusion observed with this motor resulted in less precise positioning. Our observations are well described by a 3-state model, in which active beads locally sense the net polarity of the network by frequently detaching from and reattaching to the filaments. A stochastic sequence of processive runs and diffusive searches results in a biased random walk. The precision of bead positioning is set by the gradient of net actin polarity in the network and by the run length of the cargo in an attached state. Our results unveiled physical rules for cargo transport and positioning in networks of mixed polarity.
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Affiliation(s)
- Mathieu Richard
- Laboratoire Physico-Chimie Curie, Institut Curie, PSL Research University, CNRS, UMR168, F-75248 Paris, France
- Sorbonne Université, F-75252 Paris, France
| | - Carles Blanch-Mercader
- Laboratoire Physico-Chimie Curie, Institut Curie, PSL Research University, CNRS, UMR168, F-75248 Paris, France
- Sorbonne Université, F-75252 Paris, France
| | - Hajer Ennomani
- CytomorphoLab, Biosciences and Biotechnology Institute of Grenoble, Laboratoire de Physiologie Cellulaire & Végétale, Université Grenoble-Alpes/CEA/CNRS/INRA, 38054 Grenoble, France
| | - Wenxiang Cao
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520-8114
| | - Enrique M De La Cruz
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520-8114
| | - Jean-François Joanny
- Laboratoire Physico-Chimie Curie, Institut Curie, PSL Research University, CNRS, UMR168, F-75248 Paris, France
- Sorbonne Université, F-75252 Paris, France
- ESPCI ParisTech, 75005 Paris, France
- Collège de France, 75231 Paris Cedex 05, France
| | - Frank Jülicher
- Max Planck Institute for the Physics of Complex Systems, 01187 Dresden, Germany
- Cluster of Excellence Physics of Life, Technische Universität Dresden, 01062 Dresden, Germany
| | - Laurent Blanchoin
- CytomorphoLab, Biosciences and Biotechnology Institute of Grenoble, Laboratoire de Physiologie Cellulaire & Végétale, Université Grenoble-Alpes/CEA/CNRS/INRA, 38054 Grenoble, France
- CytomorphoLab, Hôpital Saint Louis, Institut Universitaire d'Hématologie, UMRS1160, INSERM/AP-HP/Université Paris Diderot, 75010 Paris, France
| | - Pascal Martin
- Laboratoire Physico-Chimie Curie, Institut Curie, PSL Research University, CNRS, UMR168, F-75248 Paris, France;
- Sorbonne Université, F-75252 Paris, France
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Lagarde F, Fiandrino A, Ubertini M, Roque d’orbcastel E, Mortreux S, Chiantella C, Bec B, Bonnet D, Roques C, Bernard I, Richard M, Guyondet T, Pouvreau S, Lett C. Duality of trophic supply and hydrodynamic connectivity drives spatial patterns of Pacific oyster recruitment. ENDANGER SPECIES RES 2019. [DOI: 10.3354/esr13151] [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: 11/23/2022] Open
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15
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Schnaubelt ER, Charles M, Richard M, Fitter DL, Morose W, Cegielski JP. Loss to follow-up among patients receiving anti-tuberculosis treatment, Haiti, 2011-2015. Public Health Action 2018; 8:154-161. [PMID: 30775274 DOI: 10.5588/pha.18.0043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 06/25/2018] [Accepted: 08/23/2018] [Indexed: 11/10/2022] Open
Abstract
Setting: Tuberculosis (TB) treatment facilities in Haiti. Objective: To assess factors associated with loss to follow-up (LTFU) among patients receiving treatment for tuberculosis (TB) in Haiti. Design: We analyzed Haiti's national surveillance data for patients started on anti-tuberculosis treatment from 2011 to 2015 to determine factors associated with LTFU using multivariable logistic regression and describe LTFU in terms of subnational units to target future intervention strategies. We also conducted a survival analysis to estimate hazard ratios of factors associated with time to LTFU. Results: Of 81 490 TB cases reported, 7423 (9.1%) were LTFU during anti-tuberculosis treatment, increasing from 7.1% in 2011 to 10.3% in 2015. Six high-volume facilities had significantly higher rates of LTFU (14.3-31.9%) than the rest of the country, accounting for 18.8% of all TB cases reported, but 41.7% of all LTFU patients. Male sex, previous treatment history, and human immunodeficiency virus infection were associated with higher rates of LTFU. The median time to LTFU was 94 days. Conclusion: A small number of facilities accounted for disproportionately high rates of LTFU. These results identify characteristics of facilities and individuals leading to concentrated interventions to reduce LTFU and improve treatment success.
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Affiliation(s)
- E R Schnaubelt
- Division of Global HIV and Tuberculosis, Center for Global Health, Centers for Disease Control and Prevention, Atlanta, Georgia, USA.,Epidemic Intelligence Service Program, Atlanta, Georgia, USA
| | - M Charles
- Division for Global Health Protection, Center for Global Health, Centers for Disease Control and Prevention, Port-au-Prince, Haiti
| | - M Richard
- Programme National de Lutte contre la Tuberculose, Ministère de la Santé Publique et de la Population, Port-au-Prince, Haiti
| | - D L Fitter
- Division for Global Health Protection, Center for Global Health, Centers for Disease Control and Prevention, Port-au-Prince, Haiti
| | - W Morose
- Programme National de Lutte contre la Tuberculose, Ministère de la Santé Publique et de la Population, Port-au-Prince, Haiti
| | - J P Cegielski
- Division of Global HIV and Tuberculosis, Center for Global Health, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
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Pochitaloff M, Richard M, Yasuharu T, La Cruz ED, Sellers J, Joanny JF, Jülicher F, Blanchoin L, Martin P. Self Organized Wave Like Beating of Actin Bundles in a Minimal Acto-Myosin System of Controlled Architecture. Biophys J 2018. [DOI: 10.1016/j.bpj.2017.11.3505] [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] Open
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17
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Flanagan M, Li C, Dietrich MA, Richard M, Yao S. Downregulation of heat shock protein B8 decreases osteogenic differentiation potential of dental pulp stem cells during in vitro proliferation. Cell Prolif 2017; 51:e12420. [PMID: 29266518 DOI: 10.1111/cpr.12420] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [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: 08/09/2017] [Accepted: 11/02/2017] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVES Tissue-derived stem cells, such as dental pulp stem cells (DPSCs), reduce differentiation capability during in vitro culture. We found that cultured DPSCs reduce expression of heat shock protein B8 (HspB8) and GIPC PDZ domain containing family member 2 (Gipc2). Our objectives were to evaluate the changes in DPSC composition during in vitro proliferation and to determine whether HspB8 and Gipc2 have function in differentiation potential of DPSCs. MATERIALS AND METHODS Different passages of rat DPSCs were evaluated for changes in CD90+ and/or CD271+ stem cells and changes in osteogenic potential. Real-time RT-PCR and immunostaining were conducted to determine expression of HspB8 and Gipc2. Expression of the genes in DPSCs was knocked down by siRNA, followed by osteogenic induction to evaluate the function of the genes. RESULTS About 90% of cells in the DPSC cultures were CD90+ and/or CD271+ cells without dramatic change during in vitro proliferation. The DPSCs at passages 3 to 5 (P3 to P5) possess strong osteogenic potential, but such potential was greatly reduced at later passages. Expression of HspB8 and Gipc2 was significantly reduced at P11 versus P3. Knock-down of HspB8 expression abolished osteogenic potential of the DPSCs, but knock-down of Gipc2 had no effect. CONCLUSIONS CD90+ and CD271+ cells are the major components of DPSCs in in vitro culture. High-level expression of HspB8 was critical for maintaining differentiation potential of DPSCs.
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Affiliation(s)
- M Flanagan
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA, USA
| | - C Li
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA, USA
| | - M A Dietrich
- Department of Pathobiological Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA, USA
| | - M Richard
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA, USA
| | - S Yao
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA, USA
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Dorgham K, Richard B, Richard M, Lenzi M. Immobilisation de photosensibilisateurs sur des supports solides dérivés de l'acide cyanurique. ACTA ACUST UNITED AC 2017. [DOI: 10.1051/jcp/1988850579] [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: 11/14/2022]
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19
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Brun M, Lallemand A, Lorette G, Quinson JF, Richard M, Eyraud L, Eyraud C. Changement d’état liquide [math] solide dans les milieux poreux. ACTA ACUST UNITED AC 2017. [DOI: 10.1051/jcp/1973700973] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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20
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de Assis PL, Yeo I, Gloppe A, Nguyen HA, Tumanov D, Dupont-Ferrier E, Malik NS, Dupuy E, Claudon J, Gérard JM, Auffèves A, Arcizet O, Richard M, Poizat JP. Strain-Gradient Position Mapping of Semiconductor Quantum Dots. Phys Rev Lett 2017; 118:117401. [PMID: 28368631 DOI: 10.1103/physrevlett.118.117401] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Indexed: 06/07/2023]
Abstract
We introduce a nondestructive method to determine the position of randomly distributed semiconductor quantum dots (QDs) integrated in a solid photonic structure. By setting the structure in an oscillating motion, we generate a large stress gradient across the QDs plane. We then exploit the fact that the QDs emission frequency is highly sensitive to the local material stress to map the position of QDs deeply embedded in a photonic wire antenna with an accuracy ranging from ±35 nm down to ±1 nm. In the context of fast developing quantum technologies, this technique can be generalized to different photonic nanostructures embedding any stress-sensitive quantum emitters.
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Affiliation(s)
- P-L de Assis
- Institut NEEL, CNRS, Univ. Grenoble Alpes, France
- Departamento de Física, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - I Yeo
- Institut NEEL, CNRS, Univ. Grenoble Alpes, France
- INAC-PHELIQS, "Nanophysique et semiconducteurs" group, CEA, Univ. Grenoble Alpes, France
| | - A Gloppe
- Institut NEEL, CNRS, Univ. Grenoble Alpes, France
| | - H A Nguyen
- Institut NEEL, CNRS, Univ. Grenoble Alpes, France
| | - D Tumanov
- Institut NEEL, CNRS, Univ. Grenoble Alpes, France
| | | | - N S Malik
- INAC-PHELIQS, "Nanophysique et semiconducteurs" group, CEA, Univ. Grenoble Alpes, France
| | - E Dupuy
- INAC-PHELIQS, "Nanophysique et semiconducteurs" group, CEA, Univ. Grenoble Alpes, France
| | - J Claudon
- INAC-PHELIQS, "Nanophysique et semiconducteurs" group, CEA, Univ. Grenoble Alpes, France
| | - J-M Gérard
- INAC-PHELIQS, "Nanophysique et semiconducteurs" group, CEA, Univ. Grenoble Alpes, France
| | - A Auffèves
- Institut NEEL, CNRS, Univ. Grenoble Alpes, France
| | - O Arcizet
- Institut NEEL, CNRS, Univ. Grenoble Alpes, France
| | - M Richard
- Institut NEEL, CNRS, Univ. Grenoble Alpes, France
| | - J-Ph Poizat
- Institut NEEL, CNRS, Univ. Grenoble Alpes, France
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Richard M, Ennomani H, Blanch-Mercader C, de la Cruz E, Joanny JF, Jülicher F, Blanchoin L, Martin P. Active Cargo Positioning from Actin-Polarity Sensing by Small Myosin Assemblies. Biophys J 2017. [DOI: 10.1016/j.bpj.2016.11.3026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Affiliation(s)
- M. Richard
- Department of Dermatology; National Reference Centre for Rare Diseases; Bordeaux University Hospitals; Bordeaux France
| | - J. Seneschal
- Department of Dermatology; National Reference Centre for Rare Diseases; Bordeaux University Hospitals; Bordeaux France
| | - A. Taïeb
- Department of Dermatology; National Reference Centre for Rare Diseases; Bordeaux University Hospitals; Bordeaux France
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Ashworth B, Myers B, Hippman K, Viggiani S, King C, Hutchinson K, DeRoche K, Richard M, Dilks L. C-39A Progressive Study of Age and Education Norms for the Montreal Cognitive Assessment. Arch Clin Neuropsychol 2016. [DOI: 10.1093/arclin/acw043.188] [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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Hutchinson K, Richard M, Viggiani S, Dilks L, Myers B, King C, Hippman K, Ashworth B, DeRoche K. B-55An Examination of the World Health Organization Disability Assessment Schedule 2.0 with an Inpatient Rehabilitation Population. Arch Clin Neuropsychol 2016. [DOI: 10.1093/arclin/acw043.130] [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: 11/13/2022] Open
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Viggiani S, DeRoche K, Richard M, Dilks L, Hutchinson K, King C, Hippman K, Myers B, Ashworth B. B-04Multi Effects of Cerebrovascular Accident on Reading and Visual Abilities: A Case Study. Arch Clin Neuropsychol 2016. [DOI: 10.1093/arclin/acw043.79] [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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26
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Myers B, Ashworth B, Hutchinson K, Viggiani S, Chelsi K, Hippman K, Dilks L, Richard M, DeRoche K. B-06A Matched Case-Control Study of the Validity of the Montreal Cognitive Assessment for Individuals with Cerebral Vascular Accident or Orthopedic Difficulties. Arch Clin Neuropsychol 2016. [DOI: 10.1093/arclin/acw043.81] [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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Viggiani S, Myers B, Hutchinson K, DeRoche K, King C, Richard M, Hippman K, Ashworth B, Dilks L. C-04Profile of an Individual with a History of Thalidomide Exposure, Cerebral Vascular Accident, and Lifestyle Factor: A Case Study. Arch Clin Neuropsychol 2016. [DOI: 10.1093/arclin/acw043.153] [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: 11/12/2022] Open
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Skandikova C, Richard M, Morel H, Lemaire B, Longo M, Gallais-Stenz M. Comparaison d’un suivi nutritionnel précoce formalisé à une prise en charge ponctuelle dans le cancer du poumon. NUTR CLIN METAB 2016. [DOI: 10.1016/j.nupar.2016.09.052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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de la Torre JC, Fortin T, Park GA, Saunders JK, Kozlowski P, Butler K, de Socarraz H, Pappas B, Richard M. Aged but not young rats develop metabolic, memory deficits after chronic brain ischaemia. Neurol Res 2016; 14:177-80. [PMID: 1355882 DOI: 10.1080/01616412.1992.11740045] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Abstract
We consider a branching process with Poissonian immigration where individuals have inheritable types. At rate θ, new individuals singly enter the total population and start a new population which evolves like a supercritical, homogeneous, binary Crump-Mode-Jagers process: individuals have independent and identically distributed lifetime durations (nonnecessarily exponential) during which they give birth independently at a constant rateb. First, using spine decomposition, we relax previously known assumptions required for almost-sure convergence of the total population size. Then, we consider three models of structured populations: either all immigrants have a different type, or types are drawn in a discrete spectrum or in a continuous spectrum. In each model, the vector (P1,P2,…) of relative abundances of surviving families converges almost surely. In the first model, the limit is the GEM distribution with parameter θ /b.
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Monden R, Stijn D, Klaas W, Annelieke R, Richard M, Eric-Jan W. Toward evidence-based medical statistics: Re-evaluate the efficacy of antidepressants by using Bayes factors. Eur Psychiatry 2016. [DOI: 10.1016/j.eurpsy.2016.01.1511] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
IntroductionStudies have been reported the similar efficacy of antidepressants (effect size around 0.3), and it is difficult for clinicians to select an antidepressant. This may partly due to the use of a p<.05 null-hypothesis significance testing (NHST) framework to evaluate “substantial evidence”. This framework only allows dichotomous conclusions and does not quantify the strength of evidence supporting efficacy. In addition, meta-analyses based on publications may offer positively biased results due to selective publications.ObjectivesDemonstrate that the Bayesian framework can provide valuable information on the strength of the evidence for drug efficacy.AimsRe-evaluate the efficacy of FDA-approved antidepressants applied to anxiety disorders and depression by means of Bayes factors.MethodsTo avoid selective publication, data of double-blind placebo-controlled trials for FDA-approved antidepressants for the treatment of anxiety disorders and depression were extracted from the FDA. Bayes factors (BFs) were calculated and compared with the results obtained under NHST framework.ResultsA large variance of evidence for the efficacy of antidepressants was found for both depression and anxiety disorders. Among trials providing “substantial evidence” according to the FDA for anxiety disorders, only 27 out of 59 dose groups obtained strong support for efficacy according to the typically used cut-off of BF≥20. For depression, all FDA-approved antidepressants had BF≥20, except for bupriopion. Moreover, it was shown that the tested antidepressants can be differentiated based on the strength of evidence and effect size.ConclusionsThe BFs quantified the comparative evidence base for the efficacy of antidepressants.Disclosure of interestThe authors have not supplied their declaration of competing interest.
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Richard M, Charlet I, Aimé X, Krebs MO. Enrichir les classifications en psychiatrie par les données textuelles : création d’une ontologie de la psychiatrie. Eur Psychiatry 2014. [DOI: 10.1016/j.eurpsy.2014.09.323] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Le projet Covalmo s’est développé en partenariat entre le centre hospitalier Sainte-Anne et le Laboratoire d’Ingénierie des Connaissances en e-Santé. L’objectif premier de Covalmo, situé à mi-chemin entre l’Informatique et la Médecine, est d’expliciter l’ensemble des déterminants possibles de maladies psychiatriques dans le but de contribuer au développement d’un consensus sur les catégories descriptives des troubles psychiatriques, au travers d’outils et méthodes de l’Ingénierie des Connaissances. Covalmo vise ainsi au développement d’outils répondants à deux problématiques : (1) mieux décrire les diagnostics posés et les actes pratiqués, et ainsi (2) mieux indexer les dossiers patient. L’Ingénierie des Connaissances traite de la modélisation des connaissances et des problématiques qui y sont liées. Pour cela, elle développe des ontologies informatiques, qui sont des modèles permettant de recenser, organiser et lier des concepts entre eux grâce aux relations qui les unissent. Les concepts sont des entités ayant un sens dans le domaine représenté, et les relations sont les liens sémantiques entretenus entre ces concepts. Le développement de l’ontologie du domaine de la psychiatrie, OntoPsychia, est réalisé à partir des informations contenues dans un corpus textuel composé de 8000 CRH préalablement anonymisés selon un protocole strict. L’hypothèse de base de ce travail étant que les mots et les différentes verbalisations présentes dans les textes sont des traces de la conceptualisation du domaine et peuvent être utilisés pour construire l’ontologie. Les différentes nomenclatures utilisées depuis dix ans pour annoter les dossiers patients (CIM-10, DSM, ATC) sont aussi utilisées pour enrichir l’ontologie.La validation de l’ontologie sera effectuée par les experts du domaine, ainsi que par sa mise en opérationnalisation au sein d’applications dédiées, par exemple : indexation de comptes rendus et de dossiers patients ou découverte de profils de patients résistants aux traitements médicamenteux. Ci-dessous, un extrait du module d’OntoPsychia modélisant la vie sociale (Fig. 1).
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Yeo I, de Assis PL, Gloppe A, Dupont-Ferrier E, Verlot P, Malik NS, Dupuy E, Claudon J, Gérard JM, Auffèves A, Nogues G, Seidelin S, Poizat JP, Arcizet O, Richard M. Strain-mediated coupling in a quantum dot-mechanical oscillator hybrid system. Nat Nanotechnol 2014; 9:106-10. [PMID: 24362234 DOI: 10.1038/nnano.2013.274] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Accepted: 11/14/2013] [Indexed: 05/05/2023]
Abstract
Recent progress in nanotechnology has allowed the fabrication of new hybrid systems in which a single two-level system is coupled to a mechanical nanoresonator. In such systems the quantum nature of a macroscopic degree of freedom can be revealed and manipulated. This opens up appealing perspectives for quantum information technologies, and for the exploration of the quantum-classical boundary. Here we present the experimental realization of a monolithic solid-state hybrid system governed by material strain: a quantum dot is embedded within a nanowire that features discrete mechanical resonances corresponding to flexural vibration modes. Mechanical vibrations result in a time-varying strain field that modulates the quantum dot transition energy. This approach simultaneously offers a large light-extraction efficiency and a large exciton-phonon coupling strength g0. By means of optical and mechanical spectroscopy, we find that g0/2 π is nearly as large as the mechanical frequency, a criterion that defines the ultrastrong coupling regime.
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Affiliation(s)
- I Yeo
- 1] Nanophysics et Semiconductors Joint Team, Institut Néel, CNRS - Université Joseph Fourier, 38042 Grenoble, France [2] Nanophysics et Semiconductors Joint Team, CEA/INAC/SP2M and Université Joseph Fourier, 38054 Grenoble, France
| | - P-L de Assis
- Nanophysics et Semiconductors Joint Team, Institut Néel, CNRS - Université Joseph Fourier, 38042 Grenoble, France
| | - A Gloppe
- Institut Néel, CNRS and Université Joseph Fourier, 38042 Grenoble, France
| | - E Dupont-Ferrier
- Institut Néel, CNRS and Université Joseph Fourier, 38042 Grenoble, France
| | - P Verlot
- Institut Néel, CNRS and Université Joseph Fourier, 38042 Grenoble, France
| | - N S Malik
- Nanophysics et Semiconductors Joint Team, CEA/INAC/SP2M and Université Joseph Fourier, 38054 Grenoble, France
| | - E Dupuy
- Nanophysics et Semiconductors Joint Team, CEA/INAC/SP2M and Université Joseph Fourier, 38054 Grenoble, France
| | - J Claudon
- Nanophysics et Semiconductors Joint Team, CEA/INAC/SP2M and Université Joseph Fourier, 38054 Grenoble, France
| | - J-M Gérard
- Nanophysics et Semiconductors Joint Team, CEA/INAC/SP2M and Université Joseph Fourier, 38054 Grenoble, France
| | - A Auffèves
- Nanophysics et Semiconductors Joint Team, Institut Néel, CNRS - Université Joseph Fourier, 38042 Grenoble, France
| | - G Nogues
- Nanophysics et Semiconductors Joint Team, Institut Néel, CNRS - Université Joseph Fourier, 38042 Grenoble, France
| | - S Seidelin
- Institut Néel, CNRS and Université Joseph Fourier, 38042 Grenoble, France
| | - J-Ph Poizat
- Nanophysics et Semiconductors Joint Team, Institut Néel, CNRS - Université Joseph Fourier, 38042 Grenoble, France
| | - O Arcizet
- Institut Néel, CNRS and Université Joseph Fourier, 38042 Grenoble, France
| | - M Richard
- Nanophysics et Semiconductors Joint Team, Institut Néel, CNRS - Université Joseph Fourier, 38042 Grenoble, France
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Boumahni B, Richard M. [Necrotizing enterocolitis: what role is played by cytomegalovirus?]. Arch Pediatr 2014; 22:1098-9. [PMID: 24457107 DOI: 10.1016/j.arcped.2013.12.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Revised: 11/16/2013] [Accepted: 12/09/2013] [Indexed: 11/20/2022]
Affiliation(s)
- B Boumahni
- Service de réanimation néonatale et pédiatrique, centre hospitalier universitaire La Réunion, 97410 Saint-Pierre, France.
| | - M Richard
- Service de réanimation néonatale et pédiatrique, centre hospitalier universitaire La Réunion, 97410 Saint-Pierre, France
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Richard M, Mazet R, Chapuis C, Robein-Dobremez MJ, Trouiller P, Foroni L. P238 Bonnes pratiques de nutrition parentérale ternaire : supplémentations en réanimation. NUTR CLIN METAB 2013. [DOI: 10.1016/s0985-0562(13)70569-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Richard M, Lee M, Faust C, Lowe E, Harper Mallonee L. Building a Foundation for Interprofessional-Education (IPE) between Dietetic Students and Dental Hygiene Students at East Tennessee State University (ETSU). J Acad Nutr Diet 2013. [DOI: 10.1016/j.jand.2013.06.132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Richard M, Ramful D, Robillard PY, Mussard C, Loumouamou Y, Ogier M, Tasset C, N'guyen AD, Alessandri JL, Sampériz S, Gérardin P. [Prevalence, severity, and predictors of bronchopulmonary dysplasia in a cohort of very preterm infants]. Arch Pediatr 2013; 20:928-37. [PMID: 23829969 DOI: 10.1016/j.arcped.2013.05.002] [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: 04/24/2012] [Revised: 02/21/2013] [Accepted: 05/15/2013] [Indexed: 10/26/2022]
Abstract
OBJECTIVES The aim of this retrospective cohort study was to determine the prevalence and severity of BPD and its predictors in a regional cohort of very preterm (VP) infants in Reunion Island. METHODS All autochthonous VP infants, live-born before the 33rd week of gestation (WG) between 1st January 2008 and 31st December 2009, were eligible for the study. Only VP infants surviving at least 28 days, for whom the parameters were known from birth, were included in the case-control study of predictors of moderate to severe BPD (BPDmo/s). RESULTS In VP infants less than 33 WG, the rate of overall BPD (3 grades of severity) was 30.7%. Among those who survived 28 days or more, the rate of BPDmo/s was 13.1% (95%CI: 10.2-15.9%). In VP infants less than 32 WG that survived at 36 WG, the prevalence of BPDmo/s was 18.2% (95% CI: 14.2-22.1%). In a fixed-effect logistic model, adjusted for gestational age, postnatal growth, and the mode of ventilation at 24h, 4 key factors were predictive of BDPmo/s: small for gestational age, surfactant, delayed energy intake, and late-onset neonatal infection. In a mixed-effect logistic model adjusted for these same cofactors, the site was associated with BPDmo/s, in line with a center-effect. CONCLUSION The prevalence of BPDmo/s in the mixed-race population of Reunion Island is consistent with those observed in Europe but were site-specific. In our setting, predictors of individual BPDmo/s are similar to those already identified.
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Affiliation(s)
- M Richard
- Service de réanimation néonatale et pédiatrique, pôle Femme-Mère-Enfant, groupe hospitalier Sud-Réunion, centre hospitalier universitaire de Saint-Pierre, BP 350, 97448 Saint-Pierre cedex, Réunion
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Fouad Z, Hertig A, Richard M, D’hyturbide G, Mesnard L, Peltier J, Ridel C, Ouali N, Rondeau E. Non reprise primaire de la fonction rénale du greffon : étude monocentrique. Nephrol Ther 2012. [DOI: 10.1016/j.nephro.2012.07.080] [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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Schoppet M, Hofbauer LC, Brinskelle-Schmal N, Varennes A, Goudable J, Richard M, Hawa G, Chapurlat R, Szulc P. Serum level of the phosphaturic factor FGF23 is associated with abdominal aortic calcification in men: the STRAMBO study. J Clin Endocrinol Metab 2012; 97:E575-83. [PMID: 22319041 DOI: 10.1210/jc.2011-2836] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
CONTEXT Calcification inhibitor deficiencies, mineral imbalance, and phenotypic transformation of vascular cells to osteogenic cells initiate and sustain vascular calcification. Fibroblast growth factor-23 (FGF23) is a key molecule regulating mineral homeostasis. OBJECTIVE Our objective was to assess the association of serum FGF23 levels with mineral metabolism parameters and abdominal aortic calcification (AAC) in men. DESIGN This was a cross-sectional analysis in the STRAMBO cohort. SETTING Men holding a private health insurance cover with Mutuelle de Travailleurs de la Région Lyonnaise were included in the study. PARTICIPANTS Participants included male volunteers aged 20-87 (n = 1130). INTERVENTIONS Nonfasting blood collection was done. AAC was semiquantitatively assessed from vertebral fracture assessment scans obtained using dual-energy x-ray absorptiometry. MAIN OUTCOME MEASURES We evaluated the association between FGF23 concentration and AAC severity in men. RESULTS In 350 men aged 60 yr or younger, FGF23 levels decreased with age (r = -0.21; P < 0.001) but were not associated with any other parameter. In 780 men aged over 60 yr, serum FGF23 correlated with age (r = 0.37; P < 0.001) and, after adjustment for confounders, with glomerular filtration rate (r = -0.31; P < 0.001) and PTH levels (r = 0.25; P < 0.001). After adjustment for confounders, self-reported ischemic heart disease, diabetes mellitus as well as higher concentrations of C-reactive protein and osteoprotegerin were all associated with higher FGF23 levels. After adjustment for confounders, subjects in the highest FGF23 quartile had higher prevalence of severe AAC compared with the three lower quartiles combined (odds ratio = 1.88; 95% confidence interval = 1.22-2.85; P < 0.005). CONCLUSIONS In healthy older men, circulating FGF23 is associated with parameters of mineral metabolism, including bone metabolism-regulating cytokines, and with severe AAC independent of traditional risk factors.
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Affiliation(s)
- M Schoppet
- Department of Internal Medicine and Cardiology, Philipps-University, Marburg D-35043, Germany
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Tourkina E, Bonner M, Oates J, Hofbauer A, Richard M, Znoyko S, Visconti RP, Zhang J, Hatfield CM, Silver RM, Hoffman S. Altered monocyte and fibrocyte phenotype and function in scleroderma interstitial lung disease: reversal by caveolin-1 scaffolding domain peptide. Fibrogenesis Tissue Repair 2011; 4:15. [PMID: 21722364 PMCID: PMC3155832 DOI: 10.1186/1755-1536-4-15] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2011] [Accepted: 07/01/2011] [Indexed: 01/23/2023]
Abstract
Interstitial lung disease (ILD) is a major cause of morbidity and mortality in scleroderma (systemic sclerosis, or SSc). Fibrocytes are a monocyte-derived cell population implicated in the pathogenesis of fibrosing disorders. Given the recently recognized importance of caveolin-1 in regulating function and signaling in SSc monocytes, in the present study we examined the role of caveolin-1 in the migration and/or trafficking and phenotype of monocytes and fibrocytes in fibrotic lung disease in human patients and an animal model. These studies fill a gap in our understanding of how monocytes and fibrocytes contribute to SSc-ILD pathology. We found that C-X-C chemokine receptor type 4-positive (CXCR4+)/collagen I-positive (ColI+), CD34+/ColI+ and CD45+/ColI+ cells are present in SSc-ILD lungs, but not in control lungs, with CXCR4+ cells being most prevalent. Expression of CXCR4 and its ligand, stromal cell-derived factor 1 (CXCL12), are also highly upregulated in SSc-ILD lung tissue. SSc monocytes, which lack caveolin-1 and therefore overexpress CXCR4, exhibit almost sevenfold increased migration toward CXCL12 compared to control monocytes. Restoration of caveolin-1 function by administering the caveolin scaffolding domain (CSD) peptide reverses this hypermigration. Similarly, transforming growth factor β-treated normal monocytes lose caveolin-1, overexpress CXCR4 and exhibit 15-fold increased monocyte migration that is CSD peptide-sensitive. SSc monocytes exhibit a different phenotype than normal monocytes, expressing high levels of ColI, CD14 and CD34. Because ColI+/CD14+ cells are prevalent in SSc blood, we looked for such cells in lung tissue and confirmed their presence in SSc-ILD lungs but not in normal lungs. Finally, in the bleomycin model of lung fibrosis, we show that CSD peptide diminishes fibrocyte accumulation in the lungs. Our results suggest that low caveolin-1 in SSc monocytes contributes to ILD via effects on cell migration and phenotype and that the hyperaccumulation of fibrocytes in SSc-ILD may result from the altered phenotype and migratory activity of their monocyte precursors.
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Affiliation(s)
- Elena Tourkina
- Division of Rheumatology and Immunology, Department of Medicine, Medical University of South Carolina, 171 Ashley Avenue, Charleston, SC 29425, USA.
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Chaitou A, Boutroy S, Vilayphiou N, Varennes A, Richard M, Blaizot S, Munoz F, Delmas PD, Goudable J, Chapurlat R, Szulc P. Association of bone microarchitecture with parathyroid hormone concentration and calcium intake in men: the STRAMBO study. Eur J Endocrinol 2011; 165:151-9. [PMID: 21490123 DOI: 10.1530/eje-11-0184] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [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: 11/08/2022]
Abstract
UNLABELLED OBJECTVIE: In the elderly, vitamin D deficit, low calcium intake, and impaired bone microarchitecture are associated with higher risk of hip fracture. We assessed the association of bone microarchitecture with calcium intake and serum concentrations of 25-hydroxycholecalciferol (25OHD) and parathyroid hormone (PTH) in men. DESIGN Cross-sectional analysis was performed in 1064 men aged 20-87 years not taking vitamin D or calcium supplements. METHODS Daily calcium intake was assessed using a food frequency questionnaire. Bone microarchitecture was assessed at distal radius and tibia by high-resolution peripheral quantitative computed tomography. We measured serum and urinary levels of biochemical bone turnover markers (BTMs). Statistical models were adjusted for age, weight, height, and glomerular filtration rate. RESULTS In 500 men aged <65 years, lower 25OHD levels and low calcium intake were associated with lower trabecular volumetric bone mineral density (Dtrab) at the distal tibia, due to lower trabecular number (Tb.N). Low calcium intake was associated with lower cortical thickness (Ct.Th). Higher PTH level was associated with higher BTM levels. In 563 men aged ≥65 years, the highest PTH quartile was associated with lower Ct.Th (tibia), lower Dtrab (both sites), and lower Tb.N (radius) compared with the lowest quartile. Low calcium intake was associated with lower Tb.N and more heterogenous trabecular distribution. BTM positively correlated with the PTH concentration. CONCLUSION In older men, elevated PTH concentration is associated with high bone turnover, poor trabecular microarchitecture (radius and tibia), and, at the distal tibia, lower Ct.Th. Low calcium intake is associated with lower Tb.N and more heterogenous trabecular distribution.
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Affiliation(s)
- A Chaitou
- INSERM Research Unit 1033, Hôpital Edouard Herriot, Université de Lyon 1, Place d'Arsonval, 69437 Lyon, France
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Kohnle V, Léger Y, Wouters M, Richard M, Portella-Oberli MT, Deveaud-Plédran B. From single particle to superfluid excitations in a dissipative polariton gas. Phys Rev Lett 2011; 106:255302. [PMID: 21770650 DOI: 10.1103/physrevlett.106.255302] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2010] [Revised: 04/28/2011] [Indexed: 05/31/2023]
Abstract
Using an angle-resolved heterodyne four-wave-mixing technique, we probe the low momentum excitation spectrum of a coherent polariton gas. The experimental results are well captured by the Bogoliubov transformation which describes the transition from single particle excitations of a normal fluid to soundlike excitations of a superfluid. In a dense coherent polariton gas, we find all the characteristics of a Bogoliubov transformation, i.e., the positive and negative energy branch with respect to the polariton gas energy at rest, soundlike shapes for the excitations dispersion, intensity, and linewidth ratio between the two branches in agreement with the theory. The influence of the nonequilibrium character of the polariton gas is shown by a careful analysis of its dispersion.
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Affiliation(s)
- V Kohnle
- Institute of Condensed Matter Physics, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
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Richard M, Vellard M. P3.53 The small molecule BMN 195 upregulates utrophin in human myoblast and myotube cell-based assays. Neuromuscul Disord 2010. [DOI: 10.1016/j.nmd.2010.07.195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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St-Louis M, Perreault J, Lavoie J, Émond J, St-Laurent J, Long A, Richard M. Génotypage de 21 000 donneurs de sang au Québec et analyse du RHD. Transfus Clin Biol 2010; 17:242-8. [DOI: 10.1016/j.tracli.2010.08.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2010] [Accepted: 08/24/2010] [Indexed: 10/18/2022]
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Cravens TE, Richard M, Ma YJ, Bertucci C, Luhmann JG, Ledvina S, Robertson IP, Wahlund JE, Ågren K, Cui J, Muller-Wodarg I, Waite JH, Dougherty M, Bell J, Ulusen D. Dynamical and magnetic field time constants for Titan's ionosphere: Empirical estimates and comparisons with Venus. ACTA ACUST UNITED AC 2010. [DOI: 10.1029/2009ja015050] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- T. E. Cravens
- Department of Physics and Astronomy; University of Kansas; Lawrence Kansas USA
| | - M. Richard
- Department of Physics and Astronomy; University of Kansas; Lawrence Kansas USA
| | - Y.-J. Ma
- Institute of Geophysics and Planetary Physics; University of California; Los Angeles California USA
| | - C. Bertucci
- Instituto de Astronomía y Física del Espacio; Buenos Aires Argentina
| | - J. G. Luhmann
- Space Sciences Laboratory; University of California; Berkeley California USA
| | - S. Ledvina
- Space Sciences Laboratory; University of California; Berkeley California USA
| | - I. P. Robertson
- Department of Physics and Astronomy; University of Kansas; Lawrence Kansas USA
| | | | - K. Ågren
- Swedish Institute of Space Physics; Uppsala Sweden
| | - J. Cui
- Space and Atmospheric Physics Group, Blackett Laboratory; Imperial College London; London UK
| | - I. Muller-Wodarg
- Space and Atmospheric Physics Group, Blackett Laboratory; Imperial College London; London UK
| | - J. H. Waite
- Southwest Research Institute; San Antonio Texas USA
| | - M. Dougherty
- Space and Atmospheric Physics Group, Blackett Laboratory; Imperial College London; London UK
| | - J. Bell
- Southwest Research Institute; San Antonio Texas USA
| | - D. Ulusen
- Space Sciences Laboratory; University of California; Berkeley California USA
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Fianu A, Bourdial H, Carbonnier M, Jamal Bey K, Loumouamou Y, Richard M, Robillard P, Dahan Saal J, Boukerrou M, Gérardin P. P417 - L’obésité : un nouveau facteur de risque d’infection néonatale précoce à streptocoque B ? Arch Pediatr 2010. [DOI: 10.1016/s0929-693x(10)70811-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Kächele H, Kordy H, Richard M, Tr-Eat R. Therapy Amount and Outcome of Inpatient Psychodynamic Treatment of Eating Disorders in Germany: Data From a Multicenter Study. Psychother Res 2010. [DOI: 10.1080/713663982] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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