1
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Laleman I, Lambert F, Gahlert M, Bacevic M, Woelfler H, Roehling S. The effect of different abutment materials on peri-implant tissues-A systematic review and meta-analysis. Clin Oral Implants Res 2023; 34 Suppl 26:125-142. [PMID: 37750527 DOI: 10.1111/clr.14159] [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: 04/12/2023] [Revised: 07/24/2023] [Accepted: 07/26/2023] [Indexed: 09/27/2023]
Abstract
OBJECTIVES In patients with dental implants, what is the effect of transmucosal components made of materials other than titanium (alloys) compared to titanium (alloys) on the surrounding peri-implant tissues after at least 1 year? MATERIALS AND METHODS This systematic review included eligible randomized controlled trials identified through an electronic search (Medline, Embase and Web of Science) comparing alternative abutment materials versus titanium (alloy) abutments with a minimum follow-up of 1 year and including at least 10 patients/group. Primary outcomes were peri-implant marginal bone level (MBL) and probing depth (PD), these were evaluated based on meta-analyses. Abutment survival, biological and technical complications and aesthetic outcomes were the secondary outcomes. The risk of bias was assessed with the RoB2-tool. This review is registered in PROSPERO with the number (CRD42022376487). RESULTS From 5129 titles, 580 abstracts were selected, and 111 full-text articles were screened. Finally, 12 articles could be included. Concerning the primary outcomes (MBL and PD), no differences could be seen between titanium abutment and zirconia or alumina abutments, not after 1 year (MBL: zirconia: MD = -0.24, 95% CI: -0.65 to 0.16, alumina: MD = -0.06, 95% CI: -0.29 to 0.17) (PD: zirconia: MD = -0.06, 95% CI: -0.41 to 0.30, alumina: MD = -0.29, 95% CI: -0.96 to 0.38), nor after 5 years. Additionally, no differences were found concerning the biological complications and aesthetic outcomes. The most important technical finding was abutment fracture in the ceramic group and chipping of the veneering material. CONCLUSIONS Biologically, titanium and zirconia abutments seem to function equally up to 5 years after placement.
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Affiliation(s)
- I Laleman
- Department of Periodontology and Oral Surgery, Faculty of Medicine, University of Liège, Liège, Belgium
- Dental Biomaterials Research Unit (d-BRU), Faculty of Medicine, University of Liège, Liège, Belgium
| | - F Lambert
- Department of Periodontology and Oral Surgery, Faculty of Medicine, University of Liège, Liège, Belgium
- Dental Biomaterials Research Unit (d-BRU), Faculty of Medicine, University of Liège, Liège, Belgium
| | - M Gahlert
- Private Dental Clinic PD Dr. Gahlert & PD Dr. Roehling, Munich, Germany
- Sigmund Freud Private University, Vienna, Austria
- Clinic for Oral and Cranio-Maxillofacial Surgery, Hightech Research Center, University Hospital Basel, University of Basel, Basel, Switzerland
| | - M Bacevic
- Department of Periodontology and Oral Surgery, Faculty of Medicine, University of Liège, Liège, Belgium
- Centre for Oral Clinical Research, Institute of Dentistry, Barts and the London School of Medicine and Dentistry, Queen Mary University of London (QMUL), London, UK
| | - H Woelfler
- Professor for Demography, University of Bamberg, Bamberg, Germany
| | - S Roehling
- Private Dental Clinic PD Dr. Gahlert & PD Dr. Roehling, Munich, Germany
- Clinic for Oral and Cranio-Maxillofacial Surgery, Hightech Research Center, University Hospital Basel, University of Basel, Basel, Switzerland
- Clinic for Oral and Cranio-Maxillofacial Surgery, Kantonsspital Aarau, Aarau, Switzerland
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2
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Pizarro J, Vergara PM, Cerda S, Cordero RR, Castillo X, Rowe PM, Casassa G, Carrasco J, Damiani A, Llanillo PJ, Lambert F, Rondanelli R, Huneeus N, Fernandoy F, Alfonso J, Neshyba S. Contaminant emissions as indicators of chemical elements in the snow along a latitudinal gradient in southern Andes. Sci Rep 2021; 11:14530. [PMID: 34267297 PMCID: PMC8282802 DOI: 10.1038/s41598-021-93895-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 06/28/2021] [Indexed: 11/29/2022] Open
Abstract
The chemical composition of snow provides insights on atmospheric transport of anthropogenic contaminants at different spatial scales. In this study, we assess how human activities influence the concentration of elements in the Andean mountain snow along a latitudinal transect throughout Chile. The concentration of seven elements (Al, Cu, Fe, Li, Mg, Mn and Zn) was associated to gaseous and particulate contaminants emitted at different spatial scales. Our results indicate carbon monoxide (CO) averaged at 20 km and nitrogen oxide (NOx) at 40 km as the main indicators of the chemical elements analyzed. CO was found to be a significant predictor of most element concentrations while concentrations of Cu, Mn, Mg and Zn were positively associated to emissions of NOx. Emission of 2.5 μm and 10 μm particulate matter averaged at different spatial scales was positively associated to concentration of Li. Finally, the concentration of Zn was positively associated to volatile organic compounds (VOC) averaged at 40 km around sampling sites. The association between air contaminants and chemical composition of snow suggests that regions with intensive anthropogenic pollution face reduced quality of freshwater originated from glacier and snow melting.
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Affiliation(s)
- Jaime Pizarro
- Universidad de Santiago de Chile (USACH), Santiago, Chile.
| | | | - Sergio Cerda
- Universidad de Santiago de Chile (USACH), Santiago, Chile
| | - Raúl R Cordero
- Universidad de Santiago de Chile (USACH), Santiago, Chile
| | | | - Penny M Rowe
- Universidad de Santiago de Chile (USACH), Santiago, Chile.,NorthWest Research Associates, Redmond, WA, USA
| | | | | | - Alessandro Damiani
- Universidad de Santiago de Chile (USACH), Santiago, Chile.,Center for Environmental Remote Sensing, Chiba University, Chiba, Japan
| | | | - Fabrice Lambert
- Department of Physical Geography, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Roberto Rondanelli
- Universidad de Chile, Blanco Encalada 2002, Santiago, Chile.,Center for Climate and Resilience Research CR2, Blanco Encalada 2002, Santiago, Chile
| | - Nicolas Huneeus
- Universidad de Chile, Blanco Encalada 2002, Santiago, Chile.,Center for Climate and Resilience Research CR2, Blanco Encalada 2002, Santiago, Chile
| | | | - Juan Alfonso
- Instituto Venezolano de Investigaciones Científicas (IVIC), Carretera Panamericana, Km 11, Altos de Pipe, Venezuela
| | - Steven Neshyba
- Department of Chemistry, University of Puget Sound, Tacoma, WA, USA
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3
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Barraza F, Lambert F, MacDonell S, Sinclair K, Fernandoy F, Jorquera H. Major atmospheric particulate matter sources for glaciers in Coquimbo Region, Chile. Environ Sci Pollut Res Int 2021; 28:36817-36827. [PMID: 33710483 DOI: 10.1007/s11356-021-12933-7] [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] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 02/08/2021] [Indexed: 06/12/2023]
Abstract
Tapado Glacier is a subtropical mountain glacier in the Coquimbo region of Chile that has been continuously retreating during the last 60 years due to diminishing precipitation rates and rising temperatures and likely due to a currently unknown influence from atmospheric pollutant deposition. Climatic and meteorological impacts on this, and other, Andean glacier have been previously studied; however, cryosphere changes driven by aerosols are still largely unknown. To contribute to the understanding of the origin of aerosols and their dispersion, this study aims to identify natural and anthropogenic sources of air pollution deposited on the Tapado Glacier (4500-5536 m a.s.l.) and their transport by using a receptor model (positive matrix factorization) together with the concentration of major ions as proxies of air pollution deposited on this glacier. This model's outcomes were complemented with daily wind backward trajectories computed for a whole year using the HYSPLYT meteorological model. Four sources were identified as the main contributors to major soluble ions in the Tapado surface snow. These sources are natural Aeolian dust (38%) from the Atacama Desert (including mining sites), natural weathered sulphates (27%), anthropogenic nitrates (25%), and coastal aerosols (10%). Coastal nitrate emissions and coastal aerosols are both sources with an important anthropogenic component, coming from La Serena and Coquimbo's coastal cities. The crustal components and sulphate profiles are similar to detritus dispersed from the glacier after wind erosion. Although the glacier is located over 4000 m above sea level, anthropogenic pollutants reached this location. However, their contributions were smaller compared to natural contaminants. Our findings can likely be extended to the nearest glaciers in Northern Chile, which have similar potential contaminant sources from cities, ports, and thriving mining activity. However, these findings may not be suitable for southern Chilean glaciers, which are closer to bigger cities and to smoke from residential heating prevalent in winter months and wildfires during the summer.
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Affiliation(s)
- Francisco Barraza
- Instituto de Geografía, Pontificia Universidad Católica de Chile, Santiago, Chile.
- School of Geography, University of Otago, Richardson Building, 85 Albany St., Dunedin, 9054, New Zealand.
| | - Fabrice Lambert
- Instituto de Geografía, Pontificia Universidad Católica de Chile, Santiago, Chile
- Center for Climate and Resilience Research (CR2), Universidad de Chile, Santiago, Chile
| | - Shelley MacDonell
- Centro de Estudios Avanzados en Zonas Áridas (CEAZA), La Serena, Chile
| | | | - Francisco Fernandoy
- Facultad de Ingeniería, Universidad Andrés Bello, Laboratorio de Análisis Isotópico, Viña del Mar, Chile
| | - Héctor Jorquera
- Departamento de Ingeniería Química y Bioprocesos, Pontificia Universidad Católica de Chile, Santiago, Chile
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4
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Ancapichún S, De Pol-Holz R, Christie DA, Santos GM, Collado-Fabbri S, Garreaud R, Lambert F, Orfanoz-Cheuquelaf A, Rojas M, Southon J, Turnbull JC, Creasman PP. Radiocarbon bomb-peak signal in tree-rings from the tropical Andes register low latitude atmospheric dynamics in the Southern Hemisphere. Sci Total Environ 2021; 774:145126. [PMID: 33611001 DOI: 10.1016/j.scitotenv.2021.145126] [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] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 01/09/2021] [Indexed: 06/12/2023]
Abstract
South American tropical climate is strongly related to the tropical low-pressure belt associated with the South American monsoon system. Despite its central societal role as a modulating agent of rainfall in tropical South America, its long-term dynamical variability is still poorly understood. Here we combine a new (and world's highest) tree-ring 14C record from the Altiplano plateau in the central Andes with other 14C records from the Southern Hemisphere during the second half of the 20th century in order to elucidate the latitudinal gradients associated with the dissemination of the bomb 14C signal. Our tree-ring 14C record faithfully captured the bomb signal of the 1960's with an excellent match to atmospheric 14C measured in New Zealand but with significant differences with a recent record from Southeast Brazil located at almost equal latitude. These results imply that the spreading of the bomb signal throughout the Southern Hemisphere was a complex process that depended on atmospheric dynamics and surface topography generating reversals on the expected north-south gradient in certain years. We applied air-parcel modeling based on climate data to disentangle their different geographical provenances and their preformed (reservoir affected) radiocarbon content. We found that air parcel trajectories arriving at the Altiplano during the bomb period were sourced i) from the boundary layer in contact with the Pacific Ocean (41%), ii) from the upper troposphere (air above the boundary layer, with no contact with oceanic or continental carbon reservoirs) (38%) and iii) from the Amazon basin (21%). Based on these results we estimated the ∆14C endmember values for the different carbon reservoirs affecting our record which suggest that the Amazon basin biospheric 14C isoflux could have been reversed from negative to positive as early as the beginning of the 1970's. This would imply a much faster carbon turnover rate in the Amazon than previously modelled.
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Affiliation(s)
- Santiago Ancapichún
- Postgraduate School in Oceanography, Faculty of Natural and Oceanographic Sciences, Universidad de Concepción, Concepción, Chile
| | - Ricardo De Pol-Holz
- Centro de Investigación GAIA Antártica (CIGA) and Network for Extreme Environment Research (NEXER), Universidad de Magallanes, Punta Arenas, Chile.
| | - Duncan A Christie
- Laboratorio de Dendrocronología y Cambio Global, Instituto de Conservación Biodiversidad y Territorio, Universidad Austral de Chile, Valdivia, Chile; Center for Climate and Resilience Research (CR)2, Chile
| | - Guaciara M Santos
- Department of Earth System Science, University of California, Irvine, USA
| | | | - René Garreaud
- Center for Climate and Resilience Research (CR)2, Chile; Department of Geophysics, Universidad de Chile, Santiago, Chile
| | - Fabrice Lambert
- Center for Climate and Resilience Research (CR)2, Chile; Department of Physical Geography, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Andrea Orfanoz-Cheuquelaf
- Center for Climate and Resilience Research (CR)2, Chile; Department of Geophysics, Universidad de Chile, Santiago, Chile
| | - Maisa Rojas
- Center for Climate and Resilience Research (CR)2, Chile; Department of Geophysics, Universidad de Chile, Santiago, Chile
| | - John Southon
- Department of Earth System Science, University of California, Irvine, USA
| | - Jocelyn C Turnbull
- GNS Science, Rafter Radiocarbon Laboratory, Lower Hutt, New Zealand; CIRES, University of Colorado at Boulder, USA
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5
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Docampo E, Martin M, Gangolf M, Harvengt J, Bulk S, Segers K, Leroi N, Lete C, Palmariciotti V, Freire Chadrina V, Lambert F, Bours V. [Heredity and cancer]. Rev Med Liege 2021; 76:327-336. [PMID: 34080359] [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] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A personal or family history of cancer has now become the primary cause of genetic consultations. In recent years, various genes have been identified that are associated with a more or less marked genetic predisposition to the development of cancers. The syndrome associated with the hereditary risk of breast and ovarian cancer and the Lynch syndrome are the most frequent ones, but there are many other, much less common, situations associated with familial cancer risk. In most cases, there are clear recommendations regarding the indications for genetic testing and the follow-up of patients identified as having a predisposition to cancer. At the CHU of Liège, we currently perform more than 1.400 oncogenetic consultations per year and we maintain a positivity rate of genetic tests performed in this indication higher than 10%. In this way, we allow a multidisciplinary care of patients with a high oncological risk and participate in a prevention and surveillance activity. We also pay increasing attention to the hereditary risk associated with pediatric cancers and to patients with multiple cancers, especially when these develop at an early age. Finally, the oncogenetic consultation must consider the psychological, ethical and legal aspects of a diagnosis that involves the patient and his or her future, but also the whole family.
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Affiliation(s)
- E Docampo
- Services de Génétique Humaine et de Rhumatologie,CHU Liège, Belgique
| | - M Martin
- Service de Génétique Humaine, CHU Liège, Belgique
| | - M Gangolf
- Service des Informations médico-économiques,CHU Liège, Belgique
| | - J Harvengt
- Service de Génétique Humaine, CHU Liège, Belgique
| | - S Bulk
- Service de Génétique Humaine, CHU Liège, Belgique
| | - K Segers
- Service de Génétique Humaine, CHU Liège, Belgique
| | - N Leroi
- Service de Génétique Humaine, CHU Liège, Belgique
| | - C Lete
- Service de Génétique Humaine, CHU Liège, Belgique
| | | | | | - F Lambert
- Service de Génétique Humaine, CHU Liège, Belgique
| | - V Bours
- Service de Génétique Humaine, CHU Liège et GIGA, ULiège; ERN GETURIS, Belgique
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6
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Charavet C, Lambert F. [A multidisciplinary approach for accelerated orthodontics]. Rev Med Liege 2020; 75:452-456. [PMID: 32496696] [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] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
An increasing number of adult patients are seeking orthodontic treatment and several surgical and non-surgical methods have been developed to reduce the overall treatment time. Two randomized controlled clinical trials, performed in our University Hospital, demonstrated that the piezocision surgery - minimally invasive corticotomies - decreased the overall orthodontic treatment time by 43 % - effect during 4 to 6 months after the surgery - without any further clinical and radiological adverse effects. In addition, the use of a custom-made orthodontic system - brackets and arches - optimized the acceleration in the fine-tuning phase of orthodontic treatment. Finally, the combination of the two techniques is therefore relevant to maximize the reduction of the orthodontic treatment time. Fundamentally, our preclinical studies in rats have highlighted the biological phenomena underlying piezocision with an important bone demineralization and osteoclast recruitment associated with a predominant expression of the RANKL-OPG duo.
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Affiliation(s)
- C Charavet
- Service d'Orthodontie et d'Orthopédie dento-faciale, CHU Liège, Dental Biomaterials Research Unit, ULiège, Belgique
| | - F Lambert
- ) Service de Parodontologie et Chirurgie buccale et Chirurgie implantaire, CHU Liège, Dental Biomaterials Research Unit, ULiège, Belgique
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7
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Muñoz AA, Klock-Barría K, Sheppard PR, Aguilera-Betti I, Toledo-Guerrero I, Christie DA, Gorena T, Gallardo L, González-Reyes Á, Lara A, Lambert F, Gayo E, Barraza F, Chávez RO. Multidecadal environmental pollution in a mega-industrial area in central Chile registered by tree rings. Sci Total Environ 2019; 696:133915. [PMID: 31461694 DOI: 10.1016/j.scitotenv.2019.133915] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 08/05/2019] [Accepted: 08/12/2019] [Indexed: 05/21/2023]
Abstract
One of the most polluted areas in Chile is the Ventanas Industrial Area (VIA; 32.74°S / 71.48°W), which started in 1958 and today comprises around 16 industries in an area of ca. 4 km2. A lack of consistent long-term instrumental records precludes assessing the history of contamination in the area and also limits the evaluation of mitigation actions taken since the late 1980s. Here, we use dendrochemistry as an environmental proxy to analyze environmental changes over several decades at the VIA. We present chemical measurements of tree rings from planted, exotic Cupressus macrocarpa growing near the VIA with 4-year resolution over a period of 52 years (1960-2011). These data provide unprecedented information on regional anthropogenic pollution and are compared with a tree-ring elemental record of 48 years (1964-2011) from the Isla Negra (INE) control site not exposed to VIA emissions. For the 48 years of overlap between both sites, higher concentrations of Zn, V, Co, Cd, Ag, Fe, Cr, and Al were especially registered after the year 2000 at VIA compared to INE for the periods under study. Concentrations of Pb, Cu, As, Fe, Mo, Cr, and Zn increased through time, particularly over the period 1980-1990. Decontamination plans activated in 1992 appear to have had a positive effect on the amount of some elements, but the chemical concentration in the tree rings suggest continued accumulation of pollutants in the environment. Only after several years of implementation of the mitigation measures have some elements tended to decrease in concentration, especially at the end of the evaluated period. Dendrochemistry is a useful tool to provide a long-term perspective of the dynamics of trace metal pollution and represents a powerful approach to monitor air quality variability to extend the instrumental records back in time.
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Affiliation(s)
- Ariel A Muñoz
- Laboratorio de Dendrocronología y Estudios Ambientales, Instituto de Geografía, Pontificia Universidad Católica de Valparaíso, Avenida Brasil 2241, Valparaíso, Chile; Center for Climate and Resilience Research (CR)2, Santiago, Chile.
| | - Karin Klock-Barría
- Laboratorio de Dendrocronología y Estudios Ambientales, Instituto de Geografía, Pontificia Universidad Católica de Valparaíso, Avenida Brasil 2241, Valparaíso, Chile.
| | - Paul R Sheppard
- Laboratory of Tree-Ring Research, University of Arizona, Tucson, United States of America.
| | - Isabella Aguilera-Betti
- Laboratorio de Dendrocronología y Estudios Ambientales, Instituto de Geografía, Pontificia Universidad Católica de Valparaíso, Avenida Brasil 2241, Valparaíso, Chile; Centro Transdisciplinario de Estudios Ambientales y Desarrollo Humano Sostenible (CEAM), Universidad Austral de Chile, Valdivia, Chile.
| | - Isadora Toledo-Guerrero
- Laboratorio de Dendrocronología y Estudios Ambientales, Instituto de Geografía, Pontificia Universidad Católica de Valparaíso, Avenida Brasil 2241, Valparaíso, Chile.
| | - Duncan A Christie
- Laboratorio de Dendrocronología y Cambio Global, Facultad de Ciencias Forestales y Recursos Naturales, Universidad Austral de Chile, Valdivia, Chile; Center for Climate and Resilience Research (CR)2, Santiago, Chile.
| | - Tamara Gorena
- Centro de Tecnologías Ambientales, Universidad Técnica Federico Santa María, Valparaíso, Chile.
| | - Laura Gallardo
- Departamento de Geofísica, Universidad de Chile, Santiago, Chile; Center for Climate and Resilience Research (CR)2, Santiago, Chile.
| | - Álvaro González-Reyes
- Laboratorio de Dendrocronología y Cambio Global, Facultad de Ciencias Forestales y Recursos Naturales, Universidad Austral de Chile, Valdivia, Chile; Hémera Centro de Observación de la Tierra, Facultad de Ciencias, Universidad Mayor, Chile; Center for Climate and Resilience Research (CR)2, Santiago, Chile.
| | - Antonio Lara
- Laboratorio de Dendrocronología y Cambio Global, Facultad de Ciencias Forestales y Recursos Naturales, Universidad Austral de Chile, Valdivia, Chile; Center for Climate and Resilience Research (CR)2, Santiago, Chile; Fundación Centro de los Bosques Nativos FORECOS, Valdivia, Chile.
| | - Fabrice Lambert
- Departamento de Geografía, Pontificia Universidad Católica de Chile, Santiago, Chile; Center for Climate and Resilience Research (CR)2, Santiago, Chile.
| | - Eugenia Gayo
- Center for Climate and Resilience Research (CR)2, Santiago, Chile.
| | - Francisco Barraza
- Department of Preventive and Social Medicine, University of Otago, Dunedin, New Zealand.
| | - Roberto O Chávez
- Laboratorio de Geo-Información y Percepción Remota, Instituto de Geografía, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile.
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8
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Alfonso JA, Cordero RR, Rowe PM, Neshyba S, Casassa G, Carrasco J, MacDonell S, Lambert F, Pizarro J, Fernandoy F, Feron S, Damiani A, Llanillo P, Sepulveda E, Jorquera J, Garcia B, Carrera JM, Oyola P, Kang CM. Elemental and Mineralogical Composition of the Western Andean Snow (18°S-41°S). Sci Rep 2019; 9:8130. [PMID: 31148573 PMCID: PMC6544652 DOI: 10.1038/s41598-019-44516-5] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2019] [Accepted: 05/17/2019] [Indexed: 12/21/2022] Open
Abstract
The snowpack is an important source of water for many Andean communities. Because of its importance, elemental and mineralogical composition analysis of the Andean snow is a worthwhile effort. In this study, we conducted a chemical composition analysis (major and trace elements, mineralogy, and chemical enrichment) of surface snow sampled at 21 sites across a transect of about 2,500 km in the Chilean Andes (18–41°S). Our results enabled us to identify five depositional environments: (i) sites 1–3 (in the Atacama Desert, 18–26°S) with relatively high concentrations of metals, high abundance of quartz and low presence of arsenates, (ii) sites 4–8 (in northern Chile, 29–32°S) with relatively high abundance of quartz and low presence of metals and arsenates, (iii) sites 9–12 (in central Chile, 33–35°S) with anthropogenic enrichment of metals, relatively high values of quartz and low abundance of arsenates, (iv) sites 13–14 (also in central Chile, 35–37°S) with relatively high values of quartz and low presence of metals and arsenates, and v) sites 15–21 (in southern Chile, 37–41°S) with relatively high abundance of arsenates and low presence of metals and quartz. We found significant anthropogenic enrichment at sites close to Santiago (a major city of 6 million inhabitants) and in the Atacama Desert (that hosts several major copper mines).
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Affiliation(s)
- Juan A Alfonso
- Universidad de Santiago, Av. B. O'Higgins 3363, Santiago, Chile.,Instituto Venezolano de Investigaciones Científicas (IVIC), Apartado 20632, Caracas, 20632, Venezuela
| | - Raul R Cordero
- Universidad de Santiago, Av. B. O'Higgins 3363, Santiago, Chile.
| | - Penny M Rowe
- Universidad de Santiago, Av. B. O'Higgins 3363, Santiago, Chile.,NorthWest Research Associates, Redmond, USA
| | - Steven Neshyba
- Department of Chemistry, University of Puget Sound, Tacoma, USA
| | - Gino Casassa
- Unidad de Glaciología y Nieves, Ministerio de Obras Públicas, Santiago, Chile.,Centro GAIA Antártica, Universidad de Magallanes, Punta Arenas, Chile
| | - Jorge Carrasco
- Centro GAIA Antártica, Universidad de Magallanes, Punta Arenas, Chile
| | - Shelley MacDonell
- Centro de Estudios Avanzados en Zonas Áridas (CEAZA), La Serena, Chile
| | - Fabrice Lambert
- Department of Physical Geography, Pontificia Universidad Católica de Chile, Santiago, Chile.,Center for Climate and Resilience Research, Universidad de Chile, Santiago, Chile
| | - Jaime Pizarro
- Universidad de Santiago, Av. B. O'Higgins 3363, Santiago, Chile
| | | | - Sarah Feron
- Universidad de Santiago, Av. B. O'Higgins 3363, Santiago, Chile.,School of Earth, Energy and Environmental Sciences, Stanford University, Stanford, USA
| | - Alessandro Damiani
- Universidad de Santiago, Av. B. O'Higgins 3363, Santiago, Chile.,Center for Environmental Remote Sensing, Chiba University, Chiba, Japan
| | - Pedro Llanillo
- Universidad de Santiago, Av. B. O'Higgins 3363, Santiago, Chile
| | | | - Jose Jorquera
- Universidad de Santiago, Av. B. O'Higgins 3363, Santiago, Chile
| | - Belkis Garcia
- Instituto Venezolano de Investigaciones Científicas (IVIC), Apartado 20632, Caracas, 20632, Venezuela
| | - Juan M Carrera
- Instituto Venezolano de Investigaciones Científicas (IVIC), Apartado 20632, Caracas, 20632, Venezuela
| | - Pedro Oyola
- Centro Mario Molina, Antonio Bellet 292, Santiago, Chile
| | - Choong-Min Kang
- Harvard School of Public Health (HSPH), Boston, Massachusetts, USA
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9
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Rowe PM, Cordero RR, Warren SG, Stewart E, Doherty SJ, Pankow A, Schrempf M, Casassa G, Carrasco J, Pizarro J, MacDonell S, Damiani A, Lambert F, Rondanelli R, Huneeus N, Fernandoy F, Neshyba S. Black carbon and other light-absorbing impurities in snow in the Chilean Andes. Sci Rep 2019; 9:4008. [PMID: 30850621 PMCID: PMC6408441 DOI: 10.1038/s41598-019-39312-0] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [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: 07/20/2018] [Accepted: 01/16/2019] [Indexed: 11/09/2022] Open
Abstract
Vertical profiles of black carbon (BC) and other light-absorbing impurities were measured in seasonal snow and permanent snowfields in the Chilean Andes during Austral winters 2015 and 2016, at 22 sites between latitudes 18°S and 41°S. The samples were analyzed for spectrally-resolved visible light absorption. For surface snow, the average mass mixing ratio of BC was 15 ng/g in northern Chile (18-33°S), 28 ng/g near Santiago (a major city near latitude 33°S, where urban pollution plays a significant role), and 13 ng/g in southern Chile (33-41°S). The regional average vertically-integrated loading of BC was 207 µg/m2 in the north, 780 µg/m2 near Santiago, and 2500 µg/m2 in the south, where the snow season was longer and the snow was deeper. For samples collected at locations where there had been no new snowfall for a week or more, the BC concentration in surface snow was high (~10-100 ng/g) and the sub-surface snow was comparatively clean, indicating the dominance of dry deposition of BC. Mean albedo reductions due to light-absorbing impurities were 0.0150, 0.0160, and 0.0077 for snow grain radii of 100 µm for northern Chile, the region near Santiago, and southern Chile; respective mean radiative forcings for the winter months were 2.8, 1.4, and 0.6 W/m2. In northern Chile, our measurements indicate that light-absorption by impurities in snow was dominated by dust rather than BC.
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Affiliation(s)
- Penny M Rowe
- Universidad de Santiago de Chile, Santiago, Chile. .,NorthWest Research Associates, Redmond, WA, USA.
| | | | - Stephen G Warren
- Department of Atmospheric Sciences, University of Washington, Seattle, WA, USA
| | - Emily Stewart
- University of Puget Sound, Department of Chemistry, Tacoma, WA, USA
| | - Sarah J Doherty
- Joint Institute for the Study of Atmosphere and Ocean, University of Washington, Seattle, Washington, USA
| | - Alec Pankow
- University of Puget Sound, Department of Chemistry, Tacoma, WA, USA
| | - Michael Schrempf
- Leibniz Universität Hannover, Institute of Meteorology and Climatology, Hannover, Germany
| | - Gino Casassa
- Unidad de Glaciología y Nieves, Dirección General de Aguas (DGA), Ministerio de Obras Públicas (MOP), Santiago, Chile.,Centro de Investigación GAIA Antártica, Universidad de Magallanes, Punta Arenas, Chile
| | - Jorge Carrasco
- Unidad de Glaciología y Nieves, Dirección General de Aguas (DGA), Ministerio de Obras Públicas (MOP), Santiago, Chile
| | | | - Shelley MacDonell
- Centro de Estudios Avanzados en Zonas Áridas (CEAZA), La Serena, Chile
| | - Alessandro Damiani
- Universidad de Santiago de Chile, Santiago, Chile.,Center for Environmental Remote Sensing, Chiba University, Chiba, Japan
| | - Fabrice Lambert
- Department of Physical Geography, Pontifica Universidad Catolica de Chile, Santiago, Chile.,Center for Climate and Resilience Research CR2, Universidad de Chile, Santiago, Chile
| | - Roberto Rondanelli
- Universidad de Chile, Santiago, Chile.,Center for Climate and Resilience Research CR2, Universidad de Chile, Santiago, Chile
| | - Nicolas Huneeus
- Universidad de Chile, Santiago, Chile.,Center for Climate and Resilience Research CR2, Universidad de Chile, Santiago, Chile
| | - Francisco Fernandoy
- Laboratorio de Análisis Isotópico, Facultad de Ingeniería, Universidad Nacional Andrés Bello, Viña del Mar, Chile
| | - Steven Neshyba
- University of Puget Sound, Department of Chemistry, Tacoma, WA, USA
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10
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Rodríguez-Oroz D, Vidal R, Fernandoy F, Lambert F, Quiero F. Metal concentrations and source identification in Chilean public children's playgrounds. Environ Monit Assess 2018; 190:703. [PMID: 30406856 DOI: 10.1007/s10661-018-7056-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Accepted: 10/18/2018] [Indexed: 06/08/2023]
Abstract
This study is focused on four Biobio region cities, Concepcion, Talcahuano, Los Ángeles, and Tomé; these cities flourished very close to different industrial activities. We determined a pseudo total concentration of seven heavy metals (Cr, Ni, Cu, Zn, As, Cd, and Pb) in playground soils through inductively coupled plasma-mass spectrometry (ICP-MS). Principal components analysis (PCA) revealed that contamination in soils comes from three principal sources. Firstly, industrial and burning activities; secondly, the use of phytosanitary and chemical products; and thirdly, vehicular traffic emissions. Zn and Cu are the most abundant analyzed elements in all the playground's soils. Concepción reflected the lowest values of pollutants and Talcahuano the highest, reflecting the industrial effects. The average values of the analyzed elements were Cr = 32.90 mg kg-1; Ni = 23.76 mg kg-1; Cu = 31.51 mg kg-1; Zn = 63.69 mg kg-1; As = 19.51 mg kg-1; Cd = 0.50 mg kg-1; and Pb = 17.59 mg kg-1. Anomalously high values of some elements were found Cu = 462.73 mg kg-1, Zn = 364.39 mg kg-1, As = 34.7 mg kg-1 in Talcahuano, Cd = 1.6 mg kg-1 in Tome, and Pb = 55.59 mg kg-1 in Los Ángeles. Nevertheless, according to international guideline values of pollutants (VROM 2000 and ADEC 2010) there is no risk for children in any playground studied but all playgrounds are a potential risk for the environment. It points out the necessity to continue studying and monitoring Chilean urban playground to prevent health problems in the population. Graphical abstract.
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Affiliation(s)
- Delia Rodríguez-Oroz
- Centro de Investigación en Sustentabilidad y Gestión Estratégica de Recursos, Facultad de Ingeniería, Universidad del Desarrollo, Avenida Plaza 680, Santiago, Chile.
| | - Rodrigo Vidal
- Carretera Concepción-Talcahuano, Universidad Andres Bello, 7100, Concepción, Chile
| | - Francisco Fernandoy
- Facultad de Ingeniería, Universidad Andres Bello, Quillota 980, Viña del Mar, Chile
- Centro de Investigación para la Sustentabilidad, Universidad Andres Bello, República 440, Santiago, Chile
| | - Fabrice Lambert
- Geography Institute, Pontificia Universidad Catolica de Chile, Santiago, Chile
| | - Felipe Quiero
- Falculty of Exact Sciences, Department of Physics, Universidad Andres Bello, Republica 220, Santiago, Chile
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11
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Moreno PI, Vilanova I, Villa-Martínez R, Dunbar RB, Mucciarone DA, Kaplan MR, Garreaud RD, Rojas M, Moy CM, De Pol-Holz R, Lambert F. Onset and Evolution of Southern Annular Mode-Like Changes at Centennial Timescale. Sci Rep 2018; 8:3458. [PMID: 29472572 PMCID: PMC5823851 DOI: 10.1038/s41598-018-21836-6] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [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: 08/22/2017] [Accepted: 02/05/2018] [Indexed: 11/29/2022] Open
Abstract
The Southern Westerly Winds (SWW) are the surface expression of geostrophic winds that encircle the southern mid-latitudes. In conjunction with the Southern Ocean, they establish a coupled system that not only controls climate in the southern third of the world, but is also closely connected to the position of the Intertropical Convergence Zone and CO2 degassing from the deep ocean. Paradoxically, little is known about their behavior since the last ice age and relationships with mid-latitude glacier history and tropical climate variability. Here we present a lake sediment record from Chilean Patagonia (51°S) that reveals fluctuations of the low-level SWW at mid-latitudes, including strong westerlies during the Antarctic Cold Reversal, anomalously low intensity during the early Holocene, which was unfavorable for glacier growth, and strong SWW since ~7.5 ka. We detect nine positive Southern Annular Mode-like events at centennial timescale since ~5.8 ka that alternate with cold/wet intervals favorable for glacier expansions (Neoglaciations) in southern Patagonia. The correspondence of key features of mid-latitude atmospheric circulation with shifts in tropical climate since ~10 ka suggests that coherent climatic shifts in these regions have driven climate change in vast sectors of the Southern Hemisphere at centennial and millennial timescales.
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Affiliation(s)
- P I Moreno
- Departamento de Ciencias Ecológicas, Universidad de Chile, Santiago, Chile.
| | - I Vilanova
- CONICET-Museo Argentino de Ciencias Naturales, Buenos Aires, Argentina
| | | | - R B Dunbar
- School of Earth, Energy & Environmental Sciences, Stanford University, Palo Alto, CA, USA
| | - D A Mucciarone
- School of Earth, Energy & Environmental Sciences, Stanford University, Palo Alto, CA, USA
| | - M R Kaplan
- Geochemistry, Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, USA
| | - R D Garreaud
- Departamento de Geofísica, Universidad de Chile, Santiago, Chile
| | - M Rojas
- Departamento de Geofísica, Universidad de Chile, Santiago, Chile
| | - C M Moy
- Department of Geology, University of Otago, Dunedin, New Zealand
| | - R De Pol-Holz
- GAIA-Antártica, Universidad de Magallanes, Punta Arenas, Chile
| | - F Lambert
- Departamento de Geografía Física, Pontificia Universidad Católica de Chile, Santiago, Chile
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13
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14
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Abstract
There is virtually no literature detailing the effects of a disaster on the rescue workers. This paper reports the results of a questionnaire survey conducted one month after the Granville rail disaster on ninety-five of the personnel involved in the rescue work and a follow-up on thirteen of them one year later. Seventy-seven of the ninety-five found the experience stressful; in particular, the feelings of helplessness engendered by the disaster, the magnitude of the destruction, the sight and smell of mutilated bodies, the anguish of relatives, and the need to work under pressure were items highlighted by the respondents. While only about 20 percent experienced specific psychological sequelae as a result of the disaster (depression, anxiety, insomnia), approximately 70 percent of the helpers showed evidence of being temporarily strained (half of them being over this by the end of one week). Thirty-five percent felt more positive about their own lives as a result of their involvement. The utility of debriefing sessions to assist workers to come to terms with and assimilate their experiences is discussed.
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Affiliation(s)
- B. Raphael
- University of Newcastle, North South Wales, Australia
| | - B. Singh
- University of Newcastle, North South Wales, Australia
| | - L. Bradbury
- University of Newcastle, North South Wales, Australia
| | - F. Lambert
- University of Newcastle, North South Wales, Australia
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15
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Maes B, Bakkus M, Boeckx N, Boone E, Cauwelier B, Denys B, De Schouwer P, Devos T, El Housni H, Hillen F, Jacobs K, Lambert F, Louagie H, Maes MB, Meeus P, Moreau E, Nollet F, Peeters K, Saussoy P, Van Lint P, Vaerman JL, Vaeyens F, Vandepoele K, Vannuffel P, Ver Elst K, Vermeulen K, Bruyndonckx R. A novel approach forBCR-ABL1standardization to improve International Scale estimation. Int J Lab Hematol 2016; 38:674-684. [DOI: 10.1111/ijlh.12556] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Accepted: 06/13/2016] [Indexed: 01/06/2023]
Affiliation(s)
- B. Maes
- Laboratory for Molecular Diagnostics; Jessa Hospital; Hasselt Belgium
| | - M. Bakkus
- Laboratory of Haematology; University Hospital Brussels; Brussels Belgium
| | - N. Boeckx
- Department of Laboratory Medicine; University Hospitals Leuven; Leuven Belgium
| | - E. Boone
- Laboratory for Molecular Diagnostics; AZ Delta; Roeselare Belgium
| | - B. Cauwelier
- Department of Laboratory Medicine; AZ Sint-Jan Brugge-Oostende AV; Brugge Belgium
| | - B. Denys
- Laboratory for Molecular Diagnostics - Haematology; University Hospital Gent; Gent Belgium
| | | | - T. Devos
- Department of Haematology; University Hospitals; Leuven Belgium
| | | | - F. Hillen
- Laboratory for Molecular Diagnostics; Jessa Hospital; Hasselt Belgium
| | - K. Jacobs
- Clinical Laboratory; AZ Sint-Lucas; Gent Belgium
| | - F. Lambert
- Laboratory for Molecular Diagnostics; Haemato-Oncology Unit; University Hospital Liege; Liege Belgium
| | - H. Louagie
- Clinical Laboratory; AZ Sint-Lucas; Gent Belgium
| | - M.-B. Maes
- Laboratory of Haematology; University Hospital of Antwerp; Antwerp Belgium
| | - P. Meeus
- Laboratory for Molecular Diagnostics; OLV Ziekenhuis Aalst; Aalst Belgium
| | - E. Moreau
- Laboratory for Molecular Diagnostics; AZ Delta; Roeselare Belgium
| | - F. Nollet
- Department of Laboratory Medicine; AZ Sint-Jan Brugge-Oostende AV; Brugge Belgium
| | | | - P. Saussoy
- Laboratoire de biologie moléculaire; Cliniques Universitaires Saint-Luc; Bruxelles Belgium
| | - P. Van Lint
- Department of Molecular Diagnostics; GZA St-Augustinus; Wilrijk Belgium
| | - J.-L. Vaerman
- Laboratoire de biologie moléculaire; Cliniques Universitaires Saint-Luc; Bruxelles Belgium
| | - F. Vaeyens
- Laboratory for Molecular Diagnostics; OLV Ziekenhuis Aalst; Aalst Belgium
| | - K. Vandepoele
- Laboratory for Molecular Diagnostics - Haematology; University Hospital Gent; Gent Belgium
| | - P. Vannuffel
- Institut de Pathologie et de Génétique; Gosselies Belgium
| | - K. Ver Elst
- Department of Molecular Diagnostics; GZA St-Augustinus; Wilrijk Belgium
| | - K. Vermeulen
- Laboratory of Haematology; University Hospital of Antwerp; Antwerp Belgium
| | - R. Bruyndonckx
- Interuniversity Institute for Biostatistics and statistical Bioinformatics (I-BIOSTAT); University of Hasselt; Diepenbeek Belgium
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Charavet C, Lecloux G, Bruwier A, Rompen E, Maes N, Limme M, Lambert F. Localized Piezoelectric Alveolar Decortication for Orthodontic Treatment in Adults: A Randomized Controlled Trial. J Dent Res 2016; 95:1003-9. [PMID: 27129491 DOI: 10.1177/0022034516645066] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [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: 01/03/2023] Open
Abstract
This randomized controlled trial aimed to evaluate the benefits and clinical outcomes of piezocision, which is a minimally invasive approach to corticotomy that is used in orthodontic treatments. Twenty-four adult patients presenting with mild overcrowdings were randomly allocated to either a control group that was treated with conventional orthodontics or a test group that received piezo-assisted orthodontics. The piezocisions were performed 1 wk week after the placement of the orthodontic appliances. Neither grafting material nor sutures were used. All patients were followed every 2 wk, and archwires were changed only when they were no longer active. The periods required for the completion of the overall orthodontic treatments were calculated, and the periodontal parameters were evaluated at baseline and at the end of the orthodontic treatment. Patient-centered outcomes were assessed with a visual analog scale; analgesic use following the procedures was also recorded. The patient characteristics were similar between the 2 groups. The overall treatment time was significantly reduced by 43% in the piezocision group as compared with the control group. In both groups, periodontal parameters (i.e., recession depth, pocket depth, plaque index, and papilla bleeding index) remained unchanged between the baseline and treatment completion time points. No increase in root resorption was observed in either group. Scars were observed in 50% of the patients in the piezocision group. Analgesic consumption was similar following orthodontic appliance placement and piezocision surgery. Patient satisfaction was significantly better in the piezocision group than in the control group. In these conditions, the piezocision technique seemed to be effective in accelerating orthodontic tooth movement. No gingival recessions were observed. The risk of residual scars might limit the indications for piezocision in patients with a high smile line (ClinicalTrials.gov NCT02590835).
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Affiliation(s)
- C Charavet
- Department of Orthodontics and DentoFacial Orthopedics, University Hospital of Liège, Belgium Dental Biomaterials Research Unit, Faculty of Medicine, University of Liège, Belgium
| | - G Lecloux
- Dental Biomaterials Research Unit, Faculty of Medicine, University of Liège, Belgium Department of Periodontolgy and Oral Surgery, University Hospital of Liège, Belgium
| | - A Bruwier
- Department of Orthodontics and DentoFacial Orthopedics, University Hospital of Liège, Belgium
| | - E Rompen
- Dental Biomaterials Research Unit, Faculty of Medicine, University of Liège, Belgium Department of Periodontolgy and Oral Surgery, University Hospital of Liège, Belgium
| | - N Maes
- Biostatistics and Medico-economic Information Department, University Hospital of Liège, University of Liège, Belgium
| | - M Limme
- Department of Orthodontics and DentoFacial Orthopedics, University Hospital of Liège, Belgium
| | - F Lambert
- Dental Biomaterials Research Unit, Faculty of Medicine, University of Liège, Belgium Department of Periodontolgy and Oral Surgery, University Hospital of Liège, Belgium
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Jerusalem G, Collignon J, Josse C, Schroeder H, Rorive A, Frères P, Lambert F, Koopmansch B, Poncin A, Bours V. [BREAST CANCER: FROM TARGETED THERAPY TO PRECISION MEDICINE]. Rev Med Liege 2015; 70:269-276. [PMID: 26285451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The authors review the principles of systemic therapy in breast cancer. They analyze the degree of treatment individualization in our current approach. New technologies allow the detection of genomic alterations in cancer cells. Unfortunately, we do not know yet how to best use this knowledge for routine patient care. Most genomic alterations are rare events complicating further drug development. Temporal and spatial heterogeneity in tumors also has to be taken into account. An intense international collaboration is ongoing to try and demonstrate that precision medicine will really improve treatment outcome.
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18
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Dideberg V, Segers K, Koopmansch B, Lambert F, Bours V. [PHARMACOGENOMICS AND PERSONALIZED MEDICINE: TOWARDS A SYSTEMATIC GENOMIC SCREENING?]. Rev Med Liege 2015; 70:251-256. [PMID: 26285448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Recent advances in medical genomics open new perspectives for personalized medicine through the identification of genetic variants that influence drug response and/or the risk of side effects. Today, the clinical applications of pharmacogenetics remain scarce as a consequence of the cost and turn-around-time of genetic tests. However, a few tests are recommended, for instance before the prescription of some anti-cancer agents or the anti-retroviral agent abacavir. In the future, we will probably move either towards rapid targeted tests or towards a large screening, before any diagnosis, of all the genetic factors influencing the therapeutic response. In that case, physicians will have to consult the patient genomic data before drug prescription in order to personalize the choice of the therapeutic agent or its dosage. However, such a genomic approach brings economical and ethical questions and will require further progress in our capacity to interpret and store the personal genomic data without compromising their confidentiality.
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19
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Leff DR, Ho C, Thomas H, Daniels R, Side L, Lambert F, Knight J, Griffiths M, Banwell M, Aitken J, Clayton G, Dua S, Shaw A, Smith S, Ramakrishnan V. A multidisciplinary team approach minimises prophylactic mastectomy rates. Eur J Surg Oncol 2015; 41:1005-12. [PMID: 25986853 DOI: 10.1016/j.ejso.2015.02.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Revised: 01/22/2015] [Accepted: 02/12/2015] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND Prophylactic mastectomy (PM) has become increasingly common but is not without complications especially if accompanied by reconstructive surgery. In patients with sporadic unilateral breast cancer, contralateral PM offers no survival advantage. Multidisciplinary team (MDT) communication and interaction may facilitate shared decision-making and curtail PM rates. The aim of this study was investigate the effect of a regional MDT meeting on PM decision-making. METHODS We conducted an observational study involving retrospective review of prospectively recorded MDT meeting records for a 151 patient requests for PM from 2011 to 2014. Final MDT decisions were recorded as PM 'accepted', 'declined' or 'pending'. For MDT sanctioned requests, the factors justifying PM were recorded. Where PM was declined, justification for MDT refusal was sought and recorded. RESULTS Approximately half of all requests for PM have been upheld (53.0%) and 1/3 of requests have been declined (32.5%). Of those declined, low risk of contralateral breast cancer versus relatively high risk of systemic relapse were commonly cited as justification for PM refusal (45.7%). A proportion of patients who initiated PM discussion subsequently changed their minds (19.6%), or failed to attend clinic appointments (6.5%). Some patients were deemed medically unfit for complex reconstructive surgery (13%), or were declined on the basis of an apparent cosmetic drive for surgery (6.5%), concerns regarding depression or anxiety (2.2%) and/or if family history could not be substantiated (6.5%). DISCUSSION MDT meetings facilitate cross-specialty interrogation of requests for PM, minimise unnecessary surgery and restrict PM to those likely to derive maximum benefit.
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Affiliation(s)
- D R Leff
- The Breast Unit, Broomfield Hospital, Chelmsford, Essex, United Kingdom
| | - C Ho
- The Breast Unit, Broomfield Hospital, Chelmsford, Essex, United Kingdom
| | - H Thomas
- The Breast Unit, Broomfield Hospital, Chelmsford, Essex, United Kingdom
| | - R Daniels
- The Breast Unit, Broomfield Hospital, Chelmsford, Essex, United Kingdom
| | - L Side
- Institute for Women's Health, University College Hospitals, London, United Kingdom
| | - F Lambert
- Psychological Therapies Department, Mid Essex Hospitals Services NHS Trust, Essex, United Kingdom
| | - J Knight
- Breast Reconstruction Awareness Group, United Kingdom
| | - M Griffiths
- St Andrew's Centre for Burns and Plastic Surgery, Chelmsford, Essex, United Kingdom
| | - M Banwell
- St Andrew's Centre for Burns and Plastic Surgery, Chelmsford, Essex, United Kingdom
| | - J Aitken
- West Suffolk NHS Foundation Trust, Bury St Edmunds, Suffolk, United Kingdom
| | - G Clayton
- The Breast Unit, Mid Essex Hospitals NHS Trust, Broomfield Hospital, Chelmsford, Essex, United Kingdom
| | - S Dua
- The Breast Unit, Broomfield Hospital, Chelmsford, Essex, United Kingdom
| | - A Shaw
- St Andrew's Centre for Burns and Plastic Surgery, Chelmsford, Essex, United Kingdom
| | - S Smith
- The Breast Unit, Broomfield Hospital, Chelmsford, Essex, United Kingdom
| | - V Ramakrishnan
- St Andrew's Centre for Burns and Plastic Surgery, Chelmsford, Essex, United Kingdom.
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Lamy F, Gersonde R, Winckler G, Esper O, Jaeschke A, Kuhn G, Ullermann J, Martinez-Garcia A, Lambert F, Kilian R. Increased dust deposition in the Pacific Southern Ocean during glacial periods. Science 2014; 343:403-7. [PMID: 24458637 DOI: 10.1126/science.1245424] [Citation(s) in RCA: 156] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Dust deposition in the Southern Ocean constitutes a critical modulator of past global climate variability, but how it has varied temporally and geographically is underdetermined. Here, we present data sets of glacial-interglacial dust-supply cycles from the largest Southern Ocean sector, the polar South Pacific, indicating three times higher dust deposition during glacial periods than during interglacials for the past million years. Although the most likely dust source for the South Pacific is Australia and New Zealand, the glacial-interglacial pattern and timing of lithogenic sediment deposition is similar to dust records from Antarctica and the South Atlantic dominated by Patagonian sources. These similarities imply large-scale common climate forcings, such as latitudinal shifts of the southern westerlies and regionally enhanced glaciogenic dust mobilization in New Zealand and Patagonia.
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Affiliation(s)
- F Lamy
- Alfred-Wegener-Institut (AWI) Helmholtz-Zentrum für Polar- und Meeresforschung, Bremerhaven, Germany
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21
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Ticknor C, Herring SD, Lambert F, Collins LA, Kress JD. First principles nonequilibrium plasma mixing. Phys Rev E Stat Nonlin Soft Matter Phys 2014; 89:013108. [PMID: 24580347 DOI: 10.1103/physreve.89.013108] [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] [Received: 07/30/2013] [Indexed: 06/03/2023]
Abstract
We have performed nonequilibrium classical and quantum-mechanical molecular dynamics simulations that follow the interpenetration of deuterium-tritium (DT) and carbon (C) components through an interface initially in hydrostatic and thermal equilibrium. We concentrate on the warm, dense matter regime with initial densities of 2.5-5.5 g/cm3 and temperatures from 10 to 100 eV. The classical treatment employs a Yukawa pair-potential with the parameters adjusted to the plasma conditions, and the quantum treatment rests on an orbital-free density functional theory at the Thomas-Fermi-Dirac level. For times greater than about a picosecond, the component concentrations evolve in accordance with Fick's law for a classically diffusing fluid with the motion, though, described by the mutual diffusion coefficient of the mixed system rather than the self-diffusion of the individual components. For shorter times, microscopic processes control the clearly non-Fickian dynamics and require a detailed representation of the electron probability density in space and time.
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Affiliation(s)
- C Ticknor
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - S D Herring
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - F Lambert
- CEA, DAM, DIF, F-91297 Arpajon, France
| | - L A Collins
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - J D Kress
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
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22
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Debras G, Courtois C, Lambert F, Brygoo S, Duval A, Darbon S, Villette B, Masclet-Gobin I, Philippe F, Casner A, Seytor P, Videau L, Graillot H, Chies T, Henry O, Raffestin D, Chicanne C. Study of shock-coalescence on the LIL laser facility. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20135902006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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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23
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Burakovsky L, Ticknor C, Kress JD, Collins LA, Lambert F. Transport properties of lithium hydride at extreme conditions from orbital-free molecular dynamics. Phys Rev E Stat Nonlin Soft Matter Phys 2013; 87:023104. [PMID: 23496628 DOI: 10.1103/physreve.87.023104] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Revised: 11/26/2012] [Indexed: 06/01/2023]
Abstract
We have performed a systematic study of lithium hydride (LiH), using orbital-free molecular dynamics, with a focus on mass transport properties such as diffusion and viscosity by extending our previous studies at the lower end of the warm, dense matter regime to cover a span of densities from ambient to 10-fold compressed and temperatures from 10 eV to 10 keV. We determine analytic formulas for self- and mutual-diffusion coefficients, and viscosity, which are in excellent agreement with our molecular dynamics results, and interpolate smoothly between liquid and dense plasma regimes. In addition, we find the orbital-free calculations begin to agree with the Brinzinskii-Landau formula above about 250 eV at which point the medium becomes fully ionized. A binary-ion model based on a bare Coulomb interaction within a neutralizing background with the effective charges determined from a regularization prescription shows good agreement above about 100 eV with the orbital-free results. Finally, we demonstrate the validity of a pressure-based mixing rule in determining the transport properties from the pure-species quantities.
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Affiliation(s)
- L Burakovsky
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
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Malgras A, Zallot C, Lambert F, Quilliot D. O37 L’autosondage naso-gastrique : mise en place d’un programme d’éducation thérapeutique faisabilité et intérêt pour le patient, l’expérience du CHU de Nancy. NUTR CLIN METAB 2011. [DOI: 10.1016/s0985-0562(11)70041-3] [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: 11/29/2022]
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Cherfils-Clérouin C, Boniface C, Bonnefille M, Fremerye P, Galmiche D, Gauthier P, Giorla J, Lambert F, Laffite S, Liberatore S, Loiseau P, Malinie G, Masse L, Masson-Laborde PE, Monteil MC, Poggi F, Seytor P, Wagon F, Willien JL. Progress on LMJ targets for ignition. ACTA ACUST UNITED AC 2010. [DOI: 10.1088/1742-6596/244/2/022009] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Peureux S, Bonnamy S, Fixari B, Lambert F, Le Perchec P, Pepin-Donat B, Vrinat M. Deep Hydroconversion of Heavy Oil Residues with Dispersed Catalysts: Analysis of the Transformation. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19951040427] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Kress JD, Cohen JS, Horner DA, Lambert F, Collins LA. Viscosity and mutual diffusion of deuterium-tritium mixtures in the warm-dense-matter regime. Phys Rev E Stat Nonlin Soft Matter Phys 2010; 82:036404. [PMID: 21230193 DOI: 10.1103/physreve.82.036404] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2010] [Indexed: 05/30/2023]
Abstract
We have calculated viscosity and mutual diffusion of deuterium-tritium (DT) in the warm, dense matter regime for densities from 5 to 20 g/cm{3} and temperatures from 2 to 10 eV, using both finite-temperature Kohn-Sham density-functional theory molecular dynamics (QMD) and orbital-free molecular dynamics (OFMD). The OFMD simulations are in generally good agreement with the benchmark QMD results, and we conclude that the simpler OFMD method can be used with confidence in this regime. For low temperatures (3 eV and below), one-component plasma (OCP) model simulations for diffusion agree with the QMD and OFMD calculations, but deviate by 30% at 10 eV. In comparison with the QMD and OFMD results, the OCP viscosities are not as good as for diffusion, especially for 5 g/cm{3} where the temperature dependence is significantly different. The QMD and OFMD reduced diffusion and viscosity coefficients are found to depend largely, though not completely, only on the Coulomb coupling parameter Γ , with a minimum in the reduced viscosity at Γ≈25 , approximately the same position found in the OCP simulations. The QMD and OFMD equations of state (pressure) are also compared with the hydrogen two-component plasma model.
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Affiliation(s)
- J D Kress
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
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Philippé J, Nollet F, Bakkus M, Meeus P, Demanet C, Schaaf-Lafontaine N, Franke S, Chatelain B, Vermeulen K, Boone E, El Housni H, Heimann P, Husson B, Lambert F, Vannuffel P, Saussoy P, Maes B, Deschouwer P. Guidelines for an integrated diagnostic approach of chronic lymphoproliferative disorders in the routine laboratory of haematology in Belgium. Acta Clin Belg 2009; 64:494-504. [PMID: 20101872 DOI: 10.1179/acb.2009.085] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
This paper summarizes the minimal workout of chronic lymphoproliferative disorders in a routine laboratory of haematology as recommended by a team of experienced laboratory supervisors in Belgium, taking into account the specific organisation of healthcare in Belgium, the innovations in the field of molecular analyses and related reimbursement. The starting point was essentially based upon clinical and/or haematological indications and it is emphasized that conclusions should be drawn in close dialogue with the clinician and experts in cytogenetics and histopathology. Reports made in the laboratory should be based upon an integration of cytomorphological, immunophenotypical and molecular data. These guidelines are not intended to be used as universal 'diagnostic pathways', but should be useful in developing local diagnostic pathways. It is well understood that this consensus, being valid anno 2009, may rapidly change with new technologies being introduced and new targets discovered.
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Affiliation(s)
- J Philippé
- Universitair Ziekenhuis Gent, De Pintelaan 185, Gent.
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Ruth U, Barbante C, Bigler M, Delmonte B, Fischer H, Gabrielli P, Gaspari V, Kaufmann P, Lambert F, Maggi V, Marino F, Petit JR, Udisti R, Wagenbach D, Wegner A, Wolff EW. Proxies and measurement techniques for mineral dust in Antarctic ice cores. Environ Sci Technol 2008; 42:5675-5681. [PMID: 18754492 DOI: 10.1021/es703078z] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
To improve quantitative interpretation of ice core aeolian dust records, a systematic methodological comparison was made. This involved methods for water-insoluble particle counting (Coulter counter and laser-sensing particle detector), soluble ion analysis (ion chromatography and continuous flow analysis), elemental analysis (inductively coupled plasma mass spectroscopy at pH 1 and after full acid digestion), and water-insoluble elemental analysis (proton induced X-ray emission). Antarctic ice core samples covering the last deglaciation from the EPICA Dome C (EDC) and the EPICA Dronning Maud Land (EDML) cores were used. All methods correlate very well among each other, but the ratios of glacial age to Holocene concentrations, which are typically a factor approximately 100, differ between the methods by up to a factor of 2 with insoluble particles showing the largest variability. The recovery of ICP-MS measurements depends on the digestion method and is differentfor different elements and during different climatic periods. EDC and EDML samples have similar dust composition, which suggests a common dust source or a common mixture of sources for the two sites. The analyzed samples further reveal a change of dust composition during the last deglaciation.
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Affiliation(s)
- Urs Ruth
- Alfred-Wegener-Institute for Polar and Marine Research, Bremerhaven, Germany.
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Lambert F, Clérouin J, Danel JF, Kazandjian L, Zérah G. Direct verification of mixing rules in the hot and dense regime. Phys Rev E Stat Nonlin Soft Matter Phys 2008; 77:026402. [PMID: 18352128 DOI: 10.1103/physreve.77.026402] [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: 11/13/2007] [Indexed: 05/26/2023]
Abstract
We perform orbital-free molecular dynamics simulations in the hot and dense regime for two mixtures: equimolar helium-iron and asymmetric deuterium-copper plasmas. For thermodynamic properties, we test two isobaric-isothermal mixing rules whose definitions involve either the equality of total pressures or the equality of the so-defined excess pressures of the components; the pressure and internal energy obtained by direct simulations are in very good agreement with those given by the mixing rule involving the equality of excess pressures. The viscosity of the deuterium-copper mixture is also extracted from a direct simulation and compared to the result given by a mixing rule applied to the viscosities of the pure elements. Finally, for structural properties, the effective charges given by the isobaric-isothermal mixing rule for the average atom model, used in the binary ionic mixture model, yield partial pair distribution functions in good agreement with those obtained by a direct simulation.
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Affiliation(s)
- F Lambert
- Commissariat à l'Energie Atomique, Centre DAM Ile-de-France, Bruyères-le-Châtel, 91297 Arpajon Cedex, France
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Mazevet S, Lambert F, Bottin F, Zérah G, Clérouin J. Ab initio molecular dynamics simulations of dense boron plasmas up to the semiclassical Thomas-Fermi regime. Phys Rev E Stat Nonlin Soft Matter Phys 2007; 75:056404. [PMID: 17677179 DOI: 10.1103/physreve.75.056404] [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: 10/20/2006] [Indexed: 05/16/2023]
Abstract
We build an "all-electron" norm-conserving pseudopotential for boron which extends the use of ab initio molecular dynamics simulations up to 50 times the normal density rho0. This allows us to perform ab initio simulations of dense plasmas from the regime where quantum mechanical effects are important to the regime where semiclassical simulations based on the Thomas-Fermi approach are, by default, the only simulation method currently available. This study first allows one to establish, for the case of boron, the density regime from which the semiclassical Thomas-Fermi approach is legitimate and sufficient. It further brings forward various issues pertaining to the construction of pseudopotentials aimed at high-pressure studies.
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Affiliation(s)
- S Mazevet
- Département de Physique Théorique et Appliquée, CEA/DAM Ile-de-France, BP12, 91680 Bruyères-le-Châtel Cedex, France
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Wolff EW, Fischer H, Fundel F, Ruth U, Twarloh B, Littot GC, Mulvaney R, Röthlisberger R, de Angelis M, Boutron CF, Hansson M, Jonsell U, Hutterli MA, Lambert F, Kaufmann P, Stauffer B, Stocker TF, Steffensen JP, Bigler M, Siggaard-Andersen ML, Udisti R, Becagli S, Castellano E, Severi M, Wagenbach D, Barbante C, Gabrielli P, Gaspari V. Southern Ocean sea-ice extent, productivity and iron flux over the past eight glacial cycles. Nature 2006; 440:491-6. [PMID: 16554810 DOI: 10.1038/nature04614] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2005] [Accepted: 01/26/2006] [Indexed: 11/09/2022]
Abstract
Sea ice and dust flux increased greatly in the Southern Ocean during the last glacial period. Palaeorecords provide contradictory evidence about marine productivity in this region, but beyond one glacial cycle, data were sparse. Here we present continuous chemical proxy data spanning the last eight glacial cycles (740,000 years) from the Dome C Antarctic ice core. These data constrain winter sea-ice extent in the Indian Ocean, Southern Ocean biogenic productivity and Patagonian climatic conditions. We found that maximum sea-ice extent is closely tied to Antarctic temperature on multi-millennial timescales, but less so on shorter timescales. Biological dimethylsulphide emissions south of the polar front seem to have changed little with climate, suggesting that sulphur compounds were not active in climate regulation. We observe large glacial-interglacial contrasts in iron deposition, which we infer reflects strongly changing Patagonian conditions. During glacial terminations, changes in Patagonia apparently preceded sea-ice reduction, indicating that multiple mechanisms may be responsible for different phases of CO2 increase during glacial terminations. We observe no changes in internal climatic feedbacks that could have caused the change in amplitude of Antarctic temperature variations observed 440,000 years ago.
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Affiliation(s)
- E W Wolff
- British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 0ET, UK.
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Dessars B, El Housni H, Lambert F, Kentos A, Heimann P. Rational use of the EAC real-time quantitative PCR protocol in chronic myelogenous leukemia: report of three false-negative cases at diagnosis. Leukemia 2006; 20:886-8. [PMID: 16525494 DOI: 10.1038/sj.leu.2404174] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Bigler M, Röthlisberger R, Lambert F, Stocker TF, Wagenbach D. Aerosol deposited in East Antarctica over the last glacial cycle: Detailed apportionment of continental and sea-salt contributions. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2005jd006469] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Bey E, Brachet M, Lambert F, Cariou JL. [Microsurgery: History of instrumental vascular anastomoses, our experience with eversion-stapling using VCS forceps]. ANN CHIR PLAST ESTH 2005; 50:12-8. [PMID: 15695006 DOI: 10.1016/j.anplas.2004.11.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2004] [Accepted: 11/30/2004] [Indexed: 10/25/2022]
Abstract
One century, after Carrel in 1906, technics of vascular surgery are the same. After two world wars, peace surgery has been improved by war surgery. Microscopy surgery gave a new way for vascular surgery which became microsurgery with specific instrumentation. We have move from the developing period of microsurgery in the 1970s, to the fully matured period of microsurgery in the 1980s and the the development of clinical free flaps. The 1990s must be the turning point from autogenous tissue transplantation to allogenic transplantation. Ethic comity keeps keys of future! About microvascular anastomoses, many instrumental technics are explored but no-one is better than the classic manual suture. For us, the best instrumental technic is the anastomose with titanium clips VCS((R)) but we only use it in good situation without difficulties.
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Affiliation(s)
- E Bey
- Service de chirurgie plastique, H.I.A. Percy, 92141 Clamart cedex, France.
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Pouget JP, Laurent C, Delbos M, Benderitter M, Clairand I, Trompier F, Stéphanazzi J, Carsin H, Lambert F, Voisin P, Gourmelon P. PCC-FISH in Skin Fibroblasts for Local Dose Assessment: Biodosimetric Analysis of a Victim of the Georgian Radiological Accident. Radiat Res 2004; 162:365-76. [PMID: 15447046 DOI: 10.1667/rr3227] [Citation(s) in RCA: 17] [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: 11/03/2022]
Abstract
We propose a new method of biodosimetry that could be applied in cases of localized irradiation. The approach is based on excess chromosome segments determination by the PCC-FISH technique in fibroblasts isolated from skin biopsy. Typically, 0 to 10 Gy ex vivo gamma-irradiated human skin biopsies were dissociated and fibroblasts were isolated and grown for several days. Cells next underwent PCC-FISH painting of whole chromosome 4, and the number of excess chromosome segments per metaphase was determined. An ex vivo reference curve correlating the number of excess chromosome segments per metaphase to the radiation dose was established and used to assess the dose delivered to the skin of one of the victims of the radiological accident that occurred at Lia in Georgia in December 2001. Specifically, the victim suffering from moist desquamation underwent skin excision in Hospital Percy (France). Measurement of excess chromosome segments per metaphase was done in fibroblasts isolated and grown from removed wounded skin and subsequent conversion to radiation doses was performed. The radiation dose map obtained was shown to be in accordance with clinical data and physical dosimetry as well as with conventional biodosimetry. These results demonstrated that PCC-FISH painting applied to skin fibroblasts may be a suitable technique for dose estimation. To assess its worth, this approach needs to be extended to future accidents involving localized radiation exposure.
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Affiliation(s)
- J-P Pouget
- Institut de Radioprotection et de Sûreté Nucléaire, Direction de la Radioprotection de l'Homme, 92262 Fontenay-aux-Roses, France.
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Augustin L, Barbante C, Barnes PRF, Barnola JM, Bigler M, Castellano E, Cattani O, Chappellaz J, Dahl-Jensen D, Delmonte B, Dreyfus G, Durand G, Falourd S, Fischer H, Flückiger J, Hansson ME, Huybrechts P, Jugie G, Johnsen SJ, Jouzel J, Kaufmann P, Kipfstuhl J, Lambert F, Lipenkov VY, Littot GC, Longinelli A, Lorrain R, Maggi V, Masson-Delmotte V, Miller H, Mulvaney R, Oerlemans J, Oerter H, Orombelli G, Parrenin F, Peel DA, Petit JR, Raynaud D, Ritz C, Ruth U, Schwander J, Siegenthaler U, Souchez R, Stauffer B, Steffensen JP, Stenni B, Stocker TF, Tabacco IE, Udisti R, Van De Wal RSW, Van Den Broeke M, Weiss J, Wilhelms F, Winther JG, Wolff EW, Zucchelli M. Eight glacial cycles from an Antarctic ice core. Nature 2004; 429:623-8. [PMID: 15190344 DOI: 10.1038/nature02599] [Citation(s) in RCA: 323] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2004] [Accepted: 04/22/2004] [Indexed: 11/09/2022]
Abstract
The Antarctic Vostok ice core provided compelling evidence of the nature of climate, and of climate feedbacks, over the past 420,000 years. Marine records suggest that the amplitude of climate variability was smaller before that time, but such records are often poorly resolved. Moreover, it is not possible to infer the abundance of greenhouse gases in the atmosphere from marine records. Here we report the recovery of a deep ice core from Dome C, Antarctica, that provides a climate record for the past 740,000 years. For the four most recent glacial cycles, the data agree well with the record from Vostok. The earlier period, between 740,000 and 430,000 years ago, was characterized by less pronounced warmth in interglacial periods in Antarctica, but a higher proportion of each cycle was spent in the warm mode. The transition from glacial to interglacial conditions about 430,000 years ago (Termination V) resembles the transition into the present interglacial period in terms of the magnitude of change in temperatures and greenhouse gases, but there are significant differences in the patterns of change. The interglacial stage following Termination V was exceptionally long--28,000 years compared to, for example, the 12,000 years recorded so far in the present interglacial period. Given the similarities between this earlier warm period and today, our results may imply that without human intervention, a climate similar to the present one would extend well into the future.
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Affiliation(s)
- Laurent Augustin
- Laboratoire de Glaciologie et Géophysique de l'Environnement, CNRS, BP 96, 38402 St Martin d'Hères Cedex, France
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Gueugnon F, Lambert F, Gondcaille C, Fourcade S, Bellenger J, Cadepond F, El Etr M, Savary S, Bugaut M. Dehydroepiandrosterone induction of the Abcd2 and Abcd3 genes encoding peroxisomal ABC transporters: implications for X-linked adrenoleukodystrophy. Adv Exp Med Biol 2004; 544:245. [PMID: 14713237 DOI: 10.1007/978-1-4419-9072-3_31] [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] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Affiliation(s)
- Fabien Gueugnon
- Laboratory of Molecular and Cellular Biology, Faculty of Sciences Gabriel, University of Burgundy 21000 Dijon, France.
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Rutkowski MD, Lambert F, Raghavendra V, DeLeo JA. Presence of spinal B7.2 (CD86) but not B7.1 (CD80) co-stimulatory molecules following peripheral nerve injury: role of nondestructive immunity in neuropathic pain. J Neuroimmunol 2004; 146:94-8. [PMID: 14698851 DOI: 10.1016/j.jneuroim.2003.10.055] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Previous work in our laboratory demonstrated spinal neuroimmune activation and leukocyte trafficking into the central nervous system (CNS) parenchyma in a rat model of neuropathic pain. Recent studies suggest that co-stimulatory molecules B7.1 (CD80) and B7.2 (CD86) play a differential role in the effect of beneficial versus deleterious CNS autoimmune responses. In the present study, we determined the lumbar spinal expression of the co-stimulatory molecules B7.1 and B7.2 in a rat model of neuropathy. We observed intense B7.2 microglial immunoreactivity in the lumbar spinal cord following the injury but no expression of B7.1. These data suggest a role of protective CNS autoimmunity following peripheral nerve injury.
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Affiliation(s)
- M D Rutkowski
- Department of Anesthesiology, Dartmouth-Hitchcock Medical Center, Lebanon, NH 03756, USA
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Lakhel A, Bargues L, Stephanazzi J, Lambert F, Bey E, Moussaoui A, Carsin H. [Cutaneous substitutes]. Ann Dermatol Venereol 2002; 129:1205-10. [PMID: 12442143] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
Affiliation(s)
- A Lakhel
- Centre de Traitement des Brûlés, Hôpital d'Instruction des Armées Percy, 92140 Clamart, France
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Jacquy C, Sorée A, Lambert F, Bosly A, Ferrant A, André M, Parma J, Kentos A, Martiat P. A quantitative study of peripheral blood stem cell contamination in diffuse large-cell non-Hodgkin's lymphoma: one-half of patients significantly mobilize malignant cells. Br J Haematol 2000; 110:631-7. [PMID: 10997975 DOI: 10.1046/j.1365-2141.2000.02244.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Autologous transplantation using peripheral blood stem cells (PBSCs) collected after chemotherapy, followed by growth factor administration (ASCT), is increasingly used in the treatment of non-Hodgkin's lymphoma (NHL). However, quantitative data regarding contaminating malignant cells in the harvests are still scarce. We prospectively investigated 37 diffuse large-cell lymphomas (DLCLs) in complete remission (CR) that were treated according to multicentric protocols at our centre. DNA was extracted from the diagnostic lymph node. The complementarity-determining region (CDR) III was sequenced and a patient-specific oligomer synthesized. Contamination was evaluated semiquantitatively by polymerase chain reaction (PCR) and was confirmed by a limiting dilution analysis. PBSCs collected at regeneration after administration of granulocyte colony-stimulating factor (G-CSF), steady-state bone marrow (BM) and peripheral blood samples at CR were compared. DNA was available in 37 patients, from which 22 rearrangements could be sequenced. Patients (n = 15) who had both the required follow-up samples and a suitable clonal marker were investigated. In two cases, the patient-specific PCR assay set up at diagnosis later gave false-negative results in samples in which clonal DNA was still detectable by other sets of primers. PBSC contamination was highly variable: 7 out of 15 patients showed a PBSC/BM ratio of NHL cells greater than 1 log, whereas 8 out of 15 patients showed no difference and could vary from one apheresis to another. Eight ASCTs were performed, five of which used highly contaminated PBSCs: four patients relapsed early, three with disseminated lymphoma. Thus, 50% of DLCLs in CR seem to mobilize significantly malignant cells at regeneration under G-CSF. Considering the higher numbers of cells reinfused, this translates into a much higher number of lymphoma cells reinfused when compared with autologous bone marrow transplantation (ABMT). However, their clonogenic potential remains unknown and, despite concerning observations in certain cases, it is still unclear whether this has an impact upon the outcome of ASCT.
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Affiliation(s)
- C Jacquy
- Free University of Brussels, Institut Jules Bordet and Hopital Erasme, Department of Haematology, Brussels, and Catholic University of Louvain, Groupe UCL d'Hématologie, Brussels, Belgium
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Attal P, Lambert F, Marchand-Adam S, Bobin S, Pourny JC, Chemla D, Lecarpentier Y, Coirault C. Severe mechanical dysfunction in pharyngeal muscle from adult mdx mice. Am J Respir Crit Care Med 2000; 162:278-81. [PMID: 10903254 DOI: 10.1164/ajrccm.162.1.9905063-r2] [Citation(s) in RCA: 21] [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: 11/16/2022] Open
Abstract
The mdx mouse is a widely used animal model of human muscular dystrophy. Although diaphragm muscle exhibits severe muscle weakness throughout the life of the animal, the limb muscle function of mdx mice spontaneously recovers by 6 mo of age. Pharyngeal dilator muscles such as sternohyoid (SH) contribute to upper airway patency during breathing. We hypothesized that SH muscle function was impaired in 6-mo-old mdx mice. Mechanical properties and myosin heavy chain (MHC) composition were investigated in isolated SH from 6-mo-old control (C, n = 10) and mdx (n = 10) mice. As compared with C, peak tetanic tension (Pmax) and maximum shortening velocity were 50% and 16% lower in mdx mice (p < 0.001 and p < 0.05, respectively). Peak mechanical power was lower in mdx than in C (19.0 +/- 3.2 versus 57.4 +/- 5.1 mW g(-)(1), p < 0.001). Both C and mdx SH were composed exclusively of fast myosin isoforms. As compared with C, mdx SH presented a higher proportion of IIX-MHC and a reduction in IIB-MHC (each p < 0.001). In conclusion, our results demonstrated severe SH muscle dysfunction in 6-mo-old mdx mice, that is, at a time when limb muscle function has recovered. Thus, SH muscle of the mdx mouse may be an excellent muscle for studying Duchenne muscular dystrophy.
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Affiliation(s)
- P Attal
- Service d'Oto-Rhyno-Laryngologie et de Chirurgie Cervico-Faciale, Hôpital de Bicêtre; INSERM U451-Loa-ENSTA-Ecole Polytechnique, Palaiseau Cedex, France
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Carsin H, Ainaud P, Le Bever H, Rives J, Lakhel A, Stephanazzi J, Lambert F, Perrot J. Cultured epithelial autografts in extensive burn coverage of severely traumatized patients: a five year single-center experience with 30 patients. Burns 2000; 26:379-87. [PMID: 10751706 DOI: 10.1016/s0305-4179(99)00143-6] [Citation(s) in RCA: 196] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE We report recent five-year experience in a large, single center series of severely burned and otherwise traumatized patients given cultured epithelial autografts (CEA) from a single commercial laboratory. SUMMARY BACKGROUND DATA Initial optimism over CEA application has been tempered by subsequent reports asserting that this modality is unreliable and expensive. Discussion continues over its clinical role. METHODS From 1991 to 1996, CEA were applied to a mean 37+/-17% of total body surface area (TBSA) of 30 patients. These patients had 78+/-10% average burn size, 65+/-16% average third-degree burn size, 90% prevalence of endoscopically confirmed inhalation injury and 37% prevalence of other serious conditions. RESULTS CEA achieved permanent coverage of a mean 26+/-15% of TBSA, an area greater than that covered by conventional autografts (a mean 25+/-10% of TBSA). Survival was 90% in these severely burned and otherwise traumatized patients. Final CEA take was a mean 69+/-23%. In subset analyses, only younger age was significantly associated with better CEA take (p = 0.0001 in univariate analysis, p<0.04 in multivariate analysis, Student's t-test). CONCLUSIONS Epicel CEA successfully provided extensive, permanent burn coverage in severely traumatized patients, proving an important adjunct to achievement of a high survival rate in a patient population whose prognosis previously had been poor. In our experience CEA appear to have a very high beneficial value in the management of bur ns >60% TBSA. In some cases studied it is very likely that CEA was a life-saving treatment.
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Affiliation(s)
- H Carsin
- Burn Center, Centre de Traitement des Brûlés, Hôpital d'instruction des Armées Percy, 92170, Clamart, France
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Coirault C, Lambert F, Marchand-Adam S, Attal P, Chemla D, Lecarpentier Y. Myosin molecular motor dysfunction in dystrophic mouse diaphragm. Am J Physiol 1999; 277:C1170-6. [PMID: 10600768 DOI: 10.1152/ajpcell.1999.277.6.c1170] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Cross-bridge properties and myosin heavy chain (MHC) composition were investigated in isolated diaphragm from 6-mo-old control (n = 12) and mdx (n = 12) mice. Compared with control, peak tetanic tension fell by 50% in mdx mice (P < 0.001). The total number of cross bridges per square millimeter (x10(9)), the elementary force per cross bridge, and the peak mechanical efficiency were lower in mdx than in control mice (each P < 0.001). The duration of the cycle and the rate constant for cross-bridge detachment were significantly lower in mdx than in control mice. In the overall population, there was a linear relationship between peak tetanic tension and either total number of cross bridges per square millimeter or elementary force per cross bridge (r = 0.996 and r = 0.667, respectively, each P < 0.001). The mdx mice presented a higher proportion of type IIA MHC (P < 0.001) than control mice and a reduction in type IIX MHC (P < 0.001) and slow myosin isoforms (P < 0.01) compared with control mice. We concluded that, in mdx mice, impaired diaphragm strength was associated with qualitative and quantitative changes in myosin molecular motors. It is proposed that reduced force generated per cross bridge contributed to diaphragm weakness in mdx mice.
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Affiliation(s)
- C Coirault
- Institut National de la Santé et de la Recherche Médicale U451-LOA-Ensta-Ecole Polytechnique, 91761 Palaiseau Cedex, France.
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Coirault C, Langeron O, Lambert F, Blanc FX, Lerebours G, Claude N, Riou B, Chemla D, Lecarpentier Y. Impaired skeletal muscle performance in the early stage of cardiac pressure overload in rabbits: beneficial effects of angiotensin-converting enzyme inhibition. J Pharmacol Exp Ther 1999; 291:70-5. [PMID: 10490888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023] Open
Abstract
Abnormalities of skeletal muscles are frequently observed in patients with congestive heart failure. In these patients, angiotensin-converting enzyme (ACE) inhibitors improve exercise performance. The present study was designed to assess whether skeletal muscle dysfunction develops in the early stage of cardiac overload and if so, whether such functional alterations can be prevented by ACE inhibition. Mechanical performance, cross-bridge (CB) properties, and myosin heavy chain composition were investigated in respiratory and limb skeletal muscles of rabbits with moderate cardiac hypertrophy, and after single therapy with the ACE inhibitor perindopril (PE). After constriction of the aorta, the rabbits were treated during a 10-week period with either PE (1 mg/kg/day; n = 9) or a placebo (PL; n = 15). A third group of sham-operated animals received PL (n = 10). Analyses were performed on isolated diaphragm and soleus strips. Compared with sham-operated animals (shams), peak tetanic tension in PL fell by 40% in diaphragm and 34% in soleus. There were no significant differences in peak tetanic tension and the maximum shortening velocity between PE and shams. In both muscles, the total number of CBs was significantly lower in PL than in shams, but did not differ between shams and PE. The elementary force per CB did not differ between groups. In both muscles, the myosin heavy chain composition did not differ between groups. The study demonstrated that intrinsic performance of diaphragm and soleus muscles was affected early in the development of chronic pressure overload. Single therapy with PE tended to preserve muscle strength, essentially by limiting the loss of CBs.
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Affiliation(s)
- C Coirault
- Institut National de la Santé et de la Recherche Médicale, Laboratoire d'Optique Appliquée-Ecole Polytechnique, Palaiseau, France.
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Jacquy C, Lambert F, Soree A, Van Daele S, Heusterspreute M, Bosly A, Ferrant A, Parma J, Bron D, Martiat P. Peripheral blood stem cell contamination in mantle cell non-Hodgkin lymphoma: the case for purging? Bone Marrow Transplant 1999; 23:681-6. [PMID: 10218844 DOI: 10.1038/sj.bmt.1701637] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Intensification using peripheral blood stem cells collected after chemotherapy followed by growth factors is being increasingly investigated as an alternative to conventional chemotherapy for mantle cell non-Hodgkin lymphoma. We investigated 14 grades III-IV, t(11;14)-positive cases for contamination of PBSC collected after a polychemotherapy regimen followed by G-CSF. Patients were first treated with a polychemotherapy regimen. There were four CR, seven PR, two refractory and one early death. Seven patients have been transplanted, in whom PBSC were mobilized, using either cyclophosphamide/VP16 or Dexa-BEAM followed by G-CSF. For all patients, whether actually autografted or not, PB cells were tested at the time of regeneration on G-CSF after the first polychemotherapy or after the mobilizing regimen. PCR evaluation of contamination was performed first by a semi-quantitative approach, using serial dilutions of initial DNA, then confirmed using a limiting-dilution analysis. Two patients were not informative (one early death and one without an available molecular marker). PB cells collected at regeneration contained at least one log more lymphoma cells than steady-state blood or marrow, apart from in two cases. Moreover, where a mobilizing treatment diminished tumor burden in the patient, at the same time it increased PB contamination in most cases. We conclude that advanced mantle cell NHL appears to be largely resistant to significant in vivo purging by conventional chemotherapy. Where treatment brings benefits by reducing tumor load, it may at the same time negate it by mobilizing malignant cells into the collections used to intensify. Although the clonogenic potential of this massive infiltration is unknown (only gene marking studies could provide a definitive answer regarding the source of relapses), strategies aimed at reducing the level of contamination in the graft should be considered when designing future protocols.
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Affiliation(s)
- C Jacquy
- Free University of Brussels, Institut Jules Bordet, Department of Hematology and Erasme Hospital, Centre for Medical Genetics, Belgium
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Abstract
The concentrations of dopamine (DA) and its metabolites and the levels of 5-hydroxyindoleacetic acid (5-HIAA), the metabolite of serotonin, were determined in discrete cerebral areas of rats 3 hr after (neutron-gamma) irradiation at 4 and 7 Gy. After the 7 Gy irradiation, no significant effect was observed. After the 4 Gy exposure, the most marked difference between irradiated and control rats was in the levels of DA and its metabolites in the striatum. We observed a decrease of DA, HVA, and DOPAC levels in the striatum and an opposite pattern in the substantia nigra. Whatever the brain area observed, an increase of 5-HIAA levels was noted.
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Affiliation(s)
- O Foulon
- Department of Radiobiology, Centre de Recherches du Service de Santé des Armées Emile Pardé, La Tronche, France
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Coirault C, Samuel JL, Chemla D, Pourny JC, Lambert F, Marotte F, Lecarpentier Y. Increased compliance in diaphragm muscle of the cardiomyopathic Syrian hamster. J Appl Physiol (1985) 1998; 85:1762-9. [PMID: 9804579 DOI: 10.1152/jappl.1998.85.5.1762] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
We investigated the hypothesis that diaphragm compliance was abnormal in cardiomyopathic Syrian hamsters (CSH), an experimental model of myopathy. The passive elastic properties of isolated diaphragm muscles were analyzed at both the muscle and sarcomere levels. We used the following passive exponential relationship between stress (sigma) and strain (epsilon): sigma = (Eo/beta) (ebetaepsilon - 1), where Eo is the initial elastic modulus and beta is the stiffness constant. Immunocytochemistry procedures were used to analyze the distribution of two key elastic components of muscle, extracellular collagen and intracellular titin elastic components, as well as the extracellular matrix glycoprotein laminin. Muscle and sarcomere values of beta were nearly twofold lower in CSH (8.7 +/- 1.9 and 8.3 +/- 1.4, respectively) than in control animals (19.7 +/- 1.7 and 16.8 +/- 2.1, respectively) (P < 0.01 for each). Compared with controls, Eo was higher in CSH. Sarcomere slack length was significantly longer in CSH than in control animals (2.1 +/- 0.1 vs. 1.9 +/- 0.1 micrometer, P < 0.05). The surface area of collagen I was significantly larger in CSH (17.4 +/- 1.8%) than in control animals (12.4 +/- 0.7%, P < 0.05). There was no change in the distribution of titin or laminin labelings between the groups. These results demonstrate increased diaphragm compliance in cardiomyopathic hamsters. The increase in CSH diaphragm compliance was observed despite an increase in the surface area of collagen and was not associated with an abnormal distribution of titin or laminin.
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Affiliation(s)
- C Coirault
- Laboratoire d'Optique Appliquée-Ecole Polytechnique, Institut National de la Santé et de la Recherche MédicaleU451, 91125 Palaiseau cedex, France.
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Enislidis G, Pichorner S, Lambert F, Wagner A, Kainberger F, Kautzky M, Ewers R. Fixation of zygomatic fractures with a new biodegradable copolymer osteosynthesis system. Preliminary results. Int J Oral Maxillofac Surg 1998; 27:352-5. [PMID: 9804197 DOI: 10.1016/s0901-5027(98)80063-5] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
In a prospective study, a new biodegradable osteosynthesis material for the facial skeleton has been used in 27 patients with zygomatic fractures. In the six-month follow-up period, the first ten patients showed clinically and radiologically uneventful healing of bone. There were no implant-related complications. The main advantages of the new material are its malleability when heated, enabling fast adaptation to the bone surface, and the avoidance of a second operation for implant removal.
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Affiliation(s)
- G Enislidis
- University Clinic for Oral and Maxillofacial Surgery, Vienna, Austria
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