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Seoudi T, Charensol J, Trzpil W, Pages F, Ayache D, Rousseau R, Vicet A, Bahriz M. Highly Sensitive Capacitive MEMS for Photoacoustic Gas Trace Detection. Sensors (Basel) 2023; 23:3280. [PMID: 36991990 PMCID: PMC10057328 DOI: 10.3390/s23063280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 03/14/2023] [Accepted: 03/16/2023] [Indexed: 06/19/2023]
Abstract
An enhanced MEMS capacitive sensor is developed for photoacoustic gas detection. This work attempts to address the lack of the literature regarding integrated and compact silicon-based photoacoustic gas sensors. The proposed mechanical resonator combines the advantages of silicon technology used in MEMS microphones and the high-quality factor, characteristic of quartz tuning fork (QTF). The suggested design focuses on a functional partitioning of the structure to simultaneously enhance the collection of the photoacoustic energy, overcome viscous damping, and provide high nominal capacitance. The sensor is modeled and fabricated using silicon-on-insulator (SOI) wafers. First, an electrical characterization is performed to evaluate the resonator frequency response and nominal capacitance. Then, under photoacoustic excitation and without using an acoustic cavity, the viability and the linearity of the sensor are demonstrated by performing measurements on calibrated concentrations of methane in dry nitrogen. In the first harmonic detection, the limit of detection (LOD) is 104 ppmv (for 1 s integration time), leading to a normalized noise equivalent absorption coefficient (NNEA) of 8.6 ⋅ 10-8 Wcm-1 Hz-1/2, which is better than that of bare Quartz-Enhanced Photoacoustic Spectroscopy (QEPAS), a state-of-the-art reference to compact and selective gas sensors.
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Ayache D, Rousseau R, Kniazeva E, Charensol J, Seoudi T, Bahriz M, Gouzi F, Spagnolo V, Vicet A. Commercial and Custom Quartz Tuning Forks for Quartz Enhanced Photoacoustic Spectroscopy: Stability under Humidity Variation. Sensors (Basel) 2023; 23:3135. [PMID: 36991846 PMCID: PMC10052725 DOI: 10.3390/s23063135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 03/09/2023] [Accepted: 03/13/2023] [Indexed: 06/19/2023]
Abstract
This work investigates the behavior of commercial and custom Quartz tuning forkss (QTF) under humidity variations. The QTFs were placed inside a humidity chamber and the parameters were studied with a setup to record the resonance frequency and quality factor by resonance tracking. The variations of these parameters that led to a 1% theoretical error on the Quartz Enhanced Photoacoustic Spectroscopy (QEPAS) signal were defined. At a controlled level of humidity, the commercial and custom QTFs present similar results. Therefore, commercial QTFs appear to be a very good candidates for QEPAS as they are also affordable and small. When the humidity increases from 30 to 90 %RH, the variations in the custom QTFs' parameters remain suitable, while commercial QTFs show unpredictable behavior.
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Affiliation(s)
- Diba Ayache
- IES, CNRS, University Montpellier, 34095 Montpellier, France; (D.A.)
| | - Roman Rousseau
- IES, CNRS, University Montpellier, 34095 Montpellier, France; (D.A.)
| | - Elena Kniazeva
- IES, CNRS, University Montpellier, 34095 Montpellier, France; (D.A.)
- PolySense Laboratory, Università Degli Studi di Bari Aldo Moro e Politecnico di Bari, 70126 Bari, Italy
| | - Julien Charensol
- IES, CNRS, University Montpellier, 34095 Montpellier, France; (D.A.)
| | - Tarek Seoudi
- IES, CNRS, University Montpellier, 34095 Montpellier, France; (D.A.)
| | - Michael Bahriz
- IES, CNRS, University Montpellier, 34095 Montpellier, France; (D.A.)
| | - Fares Gouzi
- PhyMedExp, INSERM, CNRS, CHRU, University of Montpellier, 34000 Montpellier, France
| | - Vincenzo Spagnolo
- PolySense Laboratory, Università Degli Studi di Bari Aldo Moro e Politecnico di Bari, 70126 Bari, Italy
| | - Aurore Vicet
- IES, CNRS, University Montpellier, 34095 Montpellier, France; (D.A.)
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Ayache D, Trzpil W, Rousseau R, Kinjalk K, Teissier R, Baranov AN, Bahriz M, Vicet A. Benzene sensing by Quartz Enhanced Photoacoustic Spectroscopy at 14.85 µm. Opt Express 2022; 30:5531-5539. [PMID: 35209513 DOI: 10.1364/oe.447197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Accepted: 01/16/2022] [Indexed: 06/14/2023]
Abstract
Benzene is a gas known to be highly pollutant for the environment, for the water and cancerogenic for humans. In this paper, we present a sensor based on Quartz Enhanced Photoacoustic Spectroscopy dedicated to benzene analysis. Exploiting the infrared emission of a 14.85 µm quantum cascade laser, the sensor is working in an off-beam configuration, allowing easy alignment and stable measurements. The technique provides a very good selectivity to the sensor and a limit of detection of 30 ppbv in 1 s, i.e. a normalized noise equivalent absorption of 1.95 × 10-8 W.cm-1.Hz-1/2. The achieved performances of the sensor have enabled measurements on several air samples of a gas station showing a non-neglectable risk in case of long exposure.
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Catenacci D, Liao CY, Maron S, Solomon B, Mahipal A, Johnson M, Carbone D, Henick B, Johnson B, Roychowdhury S, Mody K, Ahn D, Bournazou E, Schenk D, Kounlavouth S, Kraemer L, Talbot G, Rousseau R, Ferguson A, Spira A. 960MO Clinical outcomes and immune responses in a phase I/II study of personalized, neoantigen-directed immunotherapy in patients with advanced MSS-CRC, GEA and NSCLC. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.1345] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Rousseau R, Ayache D, Trzpil W, Bahriz M, Vicet A. Passive Electrical Damping of a Quartz Tuning Fork as a Path to Fast Resonance Tracking in QEPAS. Sensors (Basel) 2021; 21:s21155056. [PMID: 34372292 PMCID: PMC8347380 DOI: 10.3390/s21155056] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 07/21/2021] [Accepted: 07/23/2021] [Indexed: 11/16/2022]
Abstract
In Quartz-Enhanced PhotoAcoustic Spectroscopy (QEPAS) gas sensors, the acoustic wave is detected by the piezoelectric Quartz Tuning Fork (QTF). Due to its high-quality factor, the QTF can detect very low-pressure variations, but its resonance can also be affected by the environmental variations (temperature, humidity, …), which causes an unwanted signal drift. Recently, we presented the RT-QEPAS technique that consistently corrects the signal drift by continuously measuring the QTF resonance. In this article, we present an improvement of RT-QEPAS to fasten the QTF characterization time by adding a passive electronic circuit, which causes the damping of the QTF resonance. The damping circuit is optimized analytically and through SPICE simulation. The results are supported by experimental observations, showing a 70 times improvement of the relaxation times compared to the lone QTF, which opens the way to a fast and drift-free QEPAS sensor.
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Trzpil W, Maurin N, Rousseau R, Ayache D, Vicet A, Bahriz M. Analytic Optimization of Cantilevers for Photoacoustic Gas Sensor with Capacitive Transduction. Sensors (Basel) 2021; 21:s21041489. [PMID: 33669992 PMCID: PMC7926384 DOI: 10.3390/s21041489] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 02/15/2021] [Accepted: 02/18/2021] [Indexed: 11/16/2022]
Abstract
We propose a new concept of photoacoustic gas sensing based on capacitive transduction which allows full integration while conserving the required characteristics of the sensor. For the sensor’s performance optimization, trial and error method is not feasible due to economic and time constrains. Therefore, we focus on a theoretical optimization of the sensor reinforced by computational methods implemented in a Python programming environment. We present an analytic model to optimize the geometry of a cantilever used as a capacitive transducer in photoacoustic spectroscopy. We describe all the physical parameters which have to be considered for this optimization (photoacoustic force, damping, mechanical susceptibility, capacitive transduction, etc.). These parameters are characterized by opposite trends. They are studied and compared to obtain geometric values for which the signal output and signal-to-noise ratio are maximized.
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Rousseau R, Maurin N, Trzpil W, Bahriz M, Vicet A. Quartz Tuning Fork Resonance Tracking and application in Quartz Enhanced Photoacoustics Spectroscopy. Sensors (Basel) 2019; 19:E5565. [PMID: 31888305 PMCID: PMC6960650 DOI: 10.3390/s19245565] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 12/10/2019] [Accepted: 12/12/2019] [Indexed: 11/16/2022]
Abstract
The quartz tuning fork (QTF) is a piezoelectric transducer with a high quality factor that was successfully employed in sensitive applications such as atomic force microscopy or Quartz-Enhanced Photo-Acoustic Spectroscopy (QEPAS). The variability of the environment (temperature, humidity) can lead to a drift of the QTF resonance. In most applications, regular QTF calibration is absolutely essential. Because the requirements vary greatly depending on the field of application, different characterization methods can be found in the literature. We present a review of these methods and compare them in terms of accuracy. Then, we further detail one technique, called Beat Frequency analysis, based on the transient response followed by heterodyning. This method proved to be fast and accurate. Further, we demonstrate the resonance tracking of the QTF while changing the temperature and the humidity. Finally, we integrate this characterization method in our Resonance Tracking (RT) QEPAS sensor and show the significant reduction of the signal drift compared to a conventional QEPAS sensor.
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Affiliation(s)
| | | | | | | | - Aurore Vicet
- IES, University Montpellier, CNRS, 34095 Montpellier, France; (R.R.); (N.M.); (W.T.); (M.B.)
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Rousseau R, Chiquet L, Deviere F, Jouffriault J, Menard S, Winkler L, Frey A, Vesselle B. Le Judo : un sport pour tous. Sci Sports 2019. [DOI: 10.1016/j.scispo.2019.06.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Rousseau R, Loghmari Z, Bahriz M, Chamassi K, Teissier R, Baranov AN, Vicet A. Off-beam QEPAS sensor using an 11-μm DFB-QCL with an optimized acoustic resonator. Opt Express 2019; 27:7435-7446. [PMID: 30876307 DOI: 10.1364/oe.27.007435] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 02/15/2019] [Indexed: 06/09/2023]
Abstract
An off-beam quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor was designed for ethylene detection using a distributed-feedback quantum cascade laser (QCL) operating in the mid-infrared around 11 μm. The acoustic microresonator configuration was experimentally optimized using an original open-cell photoacoustic setup with a MEMS microphone. Correction factors based on theoretical acoustic models were introduced in order to accurately describe the response of millimeter-sized acoustic resonators. The optimized QEPAS sensor exhibited a limit of detection of 60 ppb for 60 s integration, giving a NNEA of 4.8 × 10-8 W·cm-1·Hz-0.5.
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Gaspar N, Marshall LV, Binner D, Herold R, Rousseau R, Blanc P, Capdeville R, Carleer J, Copland C, Kerloeguen Y, Norga K, Pacaud L, Sevaux MA, Spadoni C, Sterba J, Ligas F, Taube T, Uttenreuther-Fischer M, Chioato S, O'Connell MA, Geoerger B, Blay JY, Soria JC, Kaye S, Wulff B, Brugières L, Vassal G, Pearson ADJ. Joint adolescent-adult early phase clinical trials to improve access to new drugs for adolescents with cancer: proposals from the multi-stakeholder platform-ACCELERATE. Ann Oncol 2018; 29:766-771. [PMID: 29351570 PMCID: PMC5889024 DOI: 10.1093/annonc/mdy002] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Affiliation(s)
- N Gaspar
- Department of Oncology for Children and Adolescents, Gustave Roussy Cancer Campus, Villejuif, France.
| | - L V Marshall
- Paediatric and Adolescent Drug Development Team, Oak Centre for Children & Young People, The Royal Marsden Hospital & The Institute of Cancer Research, London, UK
| | - D Binner
- Create for Chloe and UK Representative for aPODD, European Medicines Agency, London, UK
| | - R Herold
- Product Development Scientific Support Department, European Medicines Agency, London, UK
| | - R Rousseau
- Gritstone Oncology, Inc., Emeryville, USA
| | - P Blanc
- Imagine for Margo, Fourqueux, France
| | | | - J Carleer
- Belgium Federal Agency for Medicines and Health Products, EUROSTATION, Brussels, Belgium
| | - C Copland
- Centre for English Language Teaching, University of York, York, UK
| | - Y Kerloeguen
- Pharmaceuticals Division, PDOA, Oncology, F. Hoffmann-La Roche Ltd, Basel, Switzerland
| | - K Norga
- Paediatric and Adolescent Drug Development Team, Oak Centre for Children & Young People, The Royal Marsden Hospital & The Institute of Cancer Research, London, UK; Universitair Ziekenhuis Antwerpen, Edegem, Belgium
| | | | | | - C Spadoni
- aPODD Foundation, City Point, London, UK
| | - J Sterba
- Pediatric Oncology Department, University Hospital Brno, School of Medicine Masaryk University Brno, Regional Centre for Applied Molecular Oncology, Masaryk Memorial Cancer Institute, ICRC Brno, St. Anna University Hospital Brno, Czech Republic
| | - F Ligas
- Product Development Scientific Support Department, European Medicines Agency, London, UK
| | - T Taube
- Boehringer Ingelheim, Pharma GmbH&Co KG, TA Oncology, Biberach, Germany
| | | | - S Chioato
- Regulatory Strategy Oncology, Pfizer Italia, Milano, Italy
| | - M A O'Connell
- Regulatory Strategy Oncology, Pfizer Italia, Milano, Italy
| | - B Geoerger
- Department of Oncology for Children and Adolescents, Gustave Roussy Cancer Campus, Villejuif, France
| | - J-Y Blay
- Centre Léon Bérard and University Claude Bernard Lyon 1, Lyon
| | - J C Soria
- Drug Development Department (DITEP), Gustave Roussy, Villejuif and University Paris-Sud, Orsay, France
| | - S Kaye
- Adult Drug Development Unit, The Royal Marsden Hospital and The Institute of Cancer Research, London, UK
| | - B Wulff
- Paediatric Haematology/Oncology, Clinical Research/Paediatric Drug Development, University Childreńs Hospital III Hufelandstraße, Essen, Germany
| | - L Brugières
- Department of Oncology for Children and Adolescents, Gustave Roussy Cancer Campus, Villejuif, France
| | - G Vassal
- Department of Clinical Research, Gustave Roussy, Villejuif and Paris-Sud University, Le Kremlin-Bicêtre, France
| | - A D J Pearson
- Paediatric and Adolescent Drug Development Team, Oak Centre for Children & Young People, The Royal Marsden Hospital & The Institute of Cancer Research, London, UK
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Borel M, Rousseau R, Le Saché F, Pariente D, Castro S, Delay M, Hausfater P, Raux M, Menegaux F. Organization in response to massive afflux of war victims in civilian practice - experimental feedback from the November 2015 Paris terrorist attacks. J Visc Surg 2017; 154 Suppl 1:S3-S7. [PMID: 29055662 DOI: 10.1016/j.jviscsurg.2017.07.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The arrival of a large number of war-weapon casualties at a civilian trauma center requires anticipation. A plan defining the management principles and the respective roles of the involved physicians and nurses and their interaction with each other is essential. Uni-directional patient flow associated with adequate numbers of staff physicians and nurses under the leadership of a medical director is essential to prevent the overwhelming of the trauma center. Routine and regular interaction between the pre-hospital medical flow control system and the medical director, on one hand, and between surgical teams and the medical director, on the other, are necessary to know when to apply "damage control" surgical techniques. Based on the feedback of a level 1 trauma center that received 53 victims of the November 13, 2015 terrorist attack in Paris, we present the factors of success, and the stumbling blocks.
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Affiliation(s)
- M Borel
- Département d'anesthésie réanimation, groupe hospitalier Pitié-Salpêtrière Charles-Foix, AP-HP, 75013 Paris, France
| | - R Rousseau
- Service d'orthopédie et traumatologie, groupe hospitalier Pitié-Salpêtrière Charles-Foix, AP-HP, 75013 Paris, France; Sorbonne universités, UPMC université Paris 06, 75013 Paris, France
| | - F Le Saché
- Département d'anesthésie réanimation, groupe hospitalier Pitié-Salpêtrière Charles-Foix, AP-HP, 75013 Paris, France
| | - D Pariente
- Service d'accueil des urgences, groupe hospitalier Pitié-Salpêtrière Charles-Foix, AP-HP, 75013 Paris, France
| | - S Castro
- Service d'accueil des urgences, groupe hospitalier Pitié-Salpêtrière Charles-Foix, AP-HP, 75013 Paris, France
| | - M Delay
- Service d'accueil des urgences, groupe hospitalier Pitié-Salpêtrière Charles-Foix, AP-HP, 75013 Paris, France
| | - P Hausfater
- Sorbonne universités, UPMC université Paris 06, 75013 Paris, France; Service d'accueil des urgences, groupe hospitalier Pitié-Salpêtrière Charles-Foix, AP-HP, 75013 Paris, France
| | - M Raux
- Département d'anesthésie réanimation, groupe hospitalier Pitié-Salpêtrière Charles-Foix, AP-HP, 75013 Paris, France; Sorbonne universités, UPMC université Paris 06, 75013 Paris, France.
| | - F Menegaux
- Sorbonne universités, UPMC université Paris 06, 75013 Paris, France; Service de chirurgie viscérale et endocrinienne, groupe hospitalier Pitié-Salpêtrière Charles-Foix, AP-HP, 75013 Paris, France
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Choufani C, Rousseau R, Massein A, Pascal-Moussellard H, Khiami F. Functional and ultrasonographic outcomes after surgical fibular tendon stabilisation by isolated re-tensioning of the superior fibular retinaculum. Orthop Traumatol Surg Res 2017; 103:393-397. [PMID: 28038992 DOI: 10.1016/j.otsr.2016.12.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Revised: 11/13/2016] [Accepted: 12/05/2016] [Indexed: 02/02/2023]
Abstract
BACKGROUND Fibular tendon dislocation is a rare and usually sports-related injury. We report the functional and ultrasonographic outcomes of a simple technique for re-tensioning the superior fibular retinaculum. HYPOTHESIS Our retinaculum re-tensioning technique is not followed by recurrent fibular tendon dislocation, as demonstrated by ultrasonography. MATERIAL AND METHOD This single-centre single-surgeon retrospective study included 17 patients who underwent surgery to treat fibular tendon dislocation between January 2008 and December 2013. The functional outcome at last follow-up was assessed based on the AOFAS score. Subjective patient satisfaction and return to sports were recorded. Dynamic comparative ultrasonography was performed at last follow-up and the results used to separate the patients into four categories: normal, recurrent dislocation, subluxation, and residual tendinopathy. RESULTS The 17 patients had a mean age of 32.6±9.7 years (range, 18-52 years) and a mean pre-operative AOFAS score of 59.9±11.3 (range, 34-71). Mean follow-up was 36.9±16.9 months (range, 12-60 months). The mean AOFAS score at last follow-up was 89±9.0 (range, 68-100). Of the 17 patients, 7 (41%) returned to the same level of sports. The remaining 10 patients returned to a lower level or did not return to sports, usually (70%) for personal or work-related reasons. Follow-up ultrasonography was normal in 12 (71%) patients. Of the remaining 5 patients, 2 had clinically silent recurrent dislocation and 3 had residual tendinopathy, including 1 who was only moderately satisfied due to persistent pain. Of the 4 patients who reported pain due to the knots in the non-absorbable sutures used to tighten the retinaculum, 1 required removal of the sutures. No other complications were recorded. Finally, 16 (94%) patients were satisfied or very satisfied. DISCUSSION Retinaculum re-tensioning is effective in stabilising the fibular tendons, with no true recurrences. Ultrasonography can detect clinically silent subluxation. This simple and reproducible technique is associated with a very low complication rate and with excellent functional and anatomical outcomes. LEVEL OF EVIDENCE Retrospective, level IV.
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Affiliation(s)
- C Choufani
- Service de chirurgie orthopédique et traumatologique, Hôpital de la Pitié-Salpêtrière, Paris, France.
| | - R Rousseau
- Service de chirurgie orthopédique et traumatologique, Hôpital de la Pitié-Salpêtrière, Paris, France
| | - A Massein
- Service de radiologie ostéoarticulaire, Hôpital de la Pitié Salpêtrière, Paris, France
| | - H Pascal-Moussellard
- Service de chirurgie orthopédique et traumatologique, Hôpital de la Pitié-Salpêtrière, Paris, France
| | - F Khiami
- Service de chirurgie orthopédique et traumatologique, Hôpital de la Pitié-Salpêtrière, Paris, France
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Rossig C, Pule M, Altvater B, Saiagh S, Wright G, Ghorashian S, Clifton-Hadley L, Champion K, Sattar Z, Popova B, Hackshaw A, Smith P, Roberts T, Biagi E, Dreno B, Rousseau R, Kailayangiri S, Ahlmann M, Hough R, Kremens B, Sauer MG, Veys P, Goulden N, Cummins M, Amrolia PJ. Vaccination to improve the persistence of CD19CAR gene-modified T cells in relapsed pediatric acute lymphoblastic leukemia. Leukemia 2017; 31:1087-1095. [PMID: 28126984 DOI: 10.1038/leu.2017.39] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [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] [Received: 08/17/2016] [Revised: 11/21/2016] [Accepted: 01/05/2017] [Indexed: 12/23/2022]
Abstract
Trials with second generation CD19 chimeric antigen receptors (CAR) T-cells report unprecedented responses but are associated with risk of cytokine release syndrome (CRS). Instead, we studied the use of donor Epstein-Barr virus-specific T-cells (EBV CTL) transduced with a first generation CD19CAR, relying on the endogenous T-cell receptor for proliferation. We conducted a multi-center phase I/II study of donor CD19CAR transduced EBV CTL in pediatric acute lymphoblastic leukaemia (ALL). Patients were eligible pre-emptively if they developed molecular relapse (>5 × 10-4) post first stem cell transplant (SCT), or prophylactically post second SCT. An initial cohort showed poor expansion/persistence. We therefore investigated EBV-directed vaccination to enhance expansion/persistence. Eleven patients were treated. No CRS, neurotoxicity or graft versus host disease (GVHD) was observed. At 1 month, 5 patients were in CR (4 continuing, 1 de novo), 1 PR, 3 had stable disease and 3 no response. At a median follow-up of 12 months, 10 of 11 have relapsed, 2 are alive with disease and 1 alive in CR 3 years. Although CD19CAR CTL expansion was poor, persistence was enhanced by vaccination. Median persistence was 0 (range: 0-28) days without vaccination compared to 56 (range: 0-221) days with vaccination (P=0.06). This study demonstrates the feasibility of multi-center studies of CAR T cell therapy and the potential for enhancing persistence with vaccination.
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MESH Headings
- Antigens, CD19
- Child
- Child, Preschool
- Chimera
- Female
- Herpesvirus 4, Human
- Humans
- Immunotherapy/methods
- Immunotherapy, Adoptive
- Male
- Precursor Cell Lymphoblastic Leukemia-Lymphoma/therapy
- Receptors, Antigen, T-Cell/genetics
- Receptors, Antigen, T-Cell/immunology
- Recurrence
- T-Lymphocytes, Cytotoxic/transplantation
- T-Lymphocytes, Cytotoxic/virology
- Vaccination
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Affiliation(s)
- C Rossig
- Department of Pediatric Hematology and Oncology, University Children's Hospital, Münster, Germany
| | - M Pule
- Department of Haematology, Cancer Institute, University College London, London, UK
| | - B Altvater
- Department of Pediatric Hematology and Oncology, University Children's Hospital, Münster, Germany
| | - S Saiagh
- Unite de Therapie Cellulaire et Genetique, CHU Nantes, Nantes, France
| | - G Wright
- Department of Paediatric Haematology and Bone Marrow Transplant, Molecular and Cellular Immunology, UCL Great Ormond Street Institute of Child Health, London, UK
| | - S Ghorashian
- Molecular and Cellular Immunology Section, Institute of Child Health, University College London, London, UK
| | | | - K Champion
- Cancer Research UK and UCL Cancer Trials Centre, London, UK
| | - Z Sattar
- Cancer Research UK and UCL Cancer Trials Centre, London, UK
| | - B Popova
- Cancer Research UK and UCL Cancer Trials Centre, London, UK
| | - A Hackshaw
- Cancer Research UK and UCL Cancer Trials Centre, London, UK
| | - P Smith
- Cancer Research UK and UCL Cancer Trials Centre, London, UK
| | - T Roberts
- Cancer Research UK and UCL Cancer Trials Centre, London, UK
| | - E Biagi
- Clinica Pediatrica, Università Milano Bicocca, Osp. San Gerardo/Fondazione MBBM, Monza, Italy
| | - B Dreno
- Unite de Therapie Cellulaire et Genetique, CHU Nantes, Nantes, France
| | - R Rousseau
- Department of Pediatric Haemato-Oncology, Centre Leon Berard, Lyon, France
| | - S Kailayangiri
- Department of Pediatric Hematology and Oncology, University Children's Hospital, Münster, Germany
| | - M Ahlmann
- Department of Pediatric Hematology and Oncology, University Children's Hospital, Münster, Germany
| | - R Hough
- Department of Haematology, Cancer Institute, University College London, London, UK
| | - B Kremens
- Department of Pediatric Hematology and Oncology, University Children's Hospital Essen, Essen, Germany
| | - M G Sauer
- Department of Pediatric Hematology/Oncology, Hannover Medical School, Hannover, Germany
| | - P Veys
- Department of Paediatric Haematology and Bone Marrow Transplant, Molecular and Cellular Immunology, UCL Great Ormond Street Institute of Child Health, London, UK
| | - N Goulden
- Department of Paediatric Haematology and Bone Marrow Transplant, Molecular and Cellular Immunology, UCL Great Ormond Street Institute of Child Health, London, UK
| | - M Cummins
- Department of Bone Marrow Transplant, Bristol Royal Hospital for Children, Bristol, UK
| | - P J Amrolia
- Department of Paediatric Haematology and Bone Marrow Transplant, Molecular and Cellular Immunology, UCL Great Ormond Street Institute of Child Health, London, UK
- Molecular and Cellular Immunology Section, Institute of Child Health, University College London, London, UK
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Abstract
Temporal awareness is key to successful decision making in a wide range of command and control situations, yet little explicit support to maintaining temporal awareness is provided by Decision Support Systems (DSS) for time-critical decisions. In the context of simulated weapon-target scheduling, the present study compared the decision support gained from two display formats: typical geospatial display and temporal display. The results demonstrated that the temporal display facilitates scheduling performance though its beneficial impact seems to require greater familiarization.
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Affiliation(s)
- R. Rousseau
- School of Psychology, Université Laval, Quebec, Canada
- Informatique WGZ, Quebec, Canada
| | - S. Tremblay
- School of Psychology, Université Laval, Quebec, Canada
| | - D. Lafond
- School of Psychology, Université Laval, Quebec, Canada
- Informatique WGZ, Quebec, Canada
| | - F. Vachon
- School of Psychology, Cardiff University, Cardiff, United Kingdom
| | - R. Breton
- Defence Research and Development Canada – Valcartier
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Abstract
The present study aims to investigate how teams respond to workload transition due to a sudden and unexpected event in a complex and dynamic command and control (C2) environment. The C3Fire microworld (Granlund, 1998), a forest fire-fighting simulation, is used to compare divisional (territory-specific) and functional (role-specific) teams. Workload transition is induced by the sudden appearance of a second fire. Results show that functional teams' performance decreases while their communication frequency increases following the workload transition. However, they are faster to detect the second fire. This pattern of results suggests that in the context of C2 environments, the impact of a workload escalation varies as a function of team structure (functional vs. divisional) and the type of task (fire detection vs. fire fighting).
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Affiliation(s)
- M.-E. Jobidon
- Defence Research and Development Canada — Valcartier
| | - R. Breton
- Defence Research and Development Canada — Valcartier
| | - R. Rousseau
- Defence Research and Development Canada — Valcartier
- School of Psychology, Université Laval, Quebec, Canada
| | - S. Tremblay
- School of Psychology, Université Laval, Quebec, Canada
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Mirouse G, Rousseau R, Casabianca L, Ettori MA, Granger B, Pascal-Moussellard H, Khiami F. Return to sports and functional results after revision anterior cruciate ligament reconstruction by fascia lata autograft. Orthop Traumatol Surg Res 2016; 102:863-866. [PMID: 27720633 DOI: 10.1016/j.otsr.2016.06.017] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2016] [Revised: 06/11/2016] [Accepted: 06/17/2016] [Indexed: 02/02/2023]
Abstract
INTRODUCTION The surgical revision rate following anterior cruciate ligament (ACL) surgery is 3% at 2 years and 4% at 5 years. Revision ACL surgery raises the question of the type of graft to be used. The present study assessed return to sports and functional results after revision ACL reconstruction by fascia lata graft. The hypothesis was that fascia lata provides a reliable graft in revision ACL surgery. MATERIAL AND METHODS A single-center retrospective continuous study included 30 sports players with a mean age of 26.8±8 years undergoing surgical revision for iterative ACL tear between 2004 and 2013. Multi-ligament lesions were excluded. Type and level of sports activity were assessed preoperatively, after primary surgery and at end of follow-up. Clinical assessment used subjective IKDC, Lysholm and KOOS scores. RESULTS At a mean 4.6±1.6 years' follow-up, all patients had resumed sport activity, but only 12 with the same sport at the same level. Median subjective IKDC score increased from 57 [54.3; 58.5] preoperatively to 82 [68.3; 90] at last follow-up, and Lysholm score from 46 [42.3; 51] to 90.5 [80.8; 96.8]; KOOS score at last follow-up was 94.7 [83; 100]. CONCLUSION Functional results in revision ACL reconstruction by fascia lata graft were satisfactory, with similar return-to-sports rates as with other techniques. Fascia lata provides a reliable graft in revision ACL surgery. LEVEL OF EVIDENCE IV, retrospective study.
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Affiliation(s)
- G Mirouse
- Département de Chirurgie Orthopédique et Traumatologie du Sport, Groupe Hospitalier Pitié-Salpêtrière-Charles Foix, Assistance Publique-Hôpitaux de Paris (APHP), Paris, France.
| | - R Rousseau
- Département de Chirurgie Orthopédique et Traumatologie du Sport, Groupe Hospitalier Pitié-Salpêtrière-Charles Foix, Assistance Publique-Hôpitaux de Paris (APHP), Paris, France
| | - L Casabianca
- Département de Chirurgie Orthopédique et Traumatologie du Sport, Groupe Hospitalier Pitié-Salpêtrière-Charles Foix, Assistance Publique-Hôpitaux de Paris (APHP), Paris, France
| | - M A Ettori
- Département de Chirurgie Orthopédique et Traumatologie du Sport, Groupe Hospitalier Pitié-Salpêtrière-Charles Foix, Assistance Publique-Hôpitaux de Paris (APHP), Paris, France
| | - B Granger
- Département de Biostatistiques, de Santé Publique et d'Information Médicale, Groupe Hospitalier Pitié-Salpêtrière-Charles Foix, Assistance Publique-Hôpitaux de Paris (APHP), Paris, France
| | - H Pascal-Moussellard
- Département de Chirurgie Orthopédique et Traumatologie du Sport, Groupe Hospitalier Pitié-Salpêtrière-Charles Foix, Assistance Publique-Hôpitaux de Paris (APHP), Paris, France
| | - F Khiami
- Département de Chirurgie Orthopédique et Traumatologie du Sport, Groupe Hospitalier Pitié-Salpêtrière-Charles Foix, Assistance Publique-Hôpitaux de Paris (APHP), Paris, France
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17
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Abstract
The distributions satisfying Price's Law are characterized. From this it is seen that the Laws of Zipf and of Mandelbrot can satisfy Price's Law only approximately. The form that Price's Law takes for these two distributions is then explicitly calculated. In the case of the Law of Mandelbrot, the same Law of Price is discovered as in "L. Egghe. An exact calcula tion of Price's Law for the Law of Lotka" (to appear in Scientometrics). This was expected, since the Laws of Lotka and of Mandelbrot are equivalent. The method used in this paper however is simpler.
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Affiliation(s)
- L. Egghe
- LUC, Universitaire Campus, B-3610 Diepenbeek, Belgium; and UIA, Postbus 13, B-2610 Wilrijk, Belgium
| | - R. Rousseau
- KIH West- Vlaanderen, Zeedijk 101, B-8400 Oostende, Belgium; and, UIA, Postbus 13, B-2610 Wilrijk, Belgium
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Sadatsafavi M, Chen W, Tavakoli H, Rolf JD, Rousseau R, FitzGerald JM. Saving in medical costs by achieving guideline-based asthma symptom control: a population-based study. Allergy 2016; 71:371-7. [PMID: 26529357 DOI: 10.1111/all.12803] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/28/2015] [Indexed: 11/30/2022]
Abstract
BACKGROUND Asthma control is increasingly used as an outcome measure in asthma trials. Economic evaluations of asthma interventions require converting the impact of interventions on control to impact on resource use. The purpose of this study was to estimate the savings in direct costs by achieving asthma symptom control as defined in the Global Initiative for Asthma (GINA) 2014 management strategy. METHODS Adolescents and adults with asthma were recruited through random digit dialing. Asthma control per GINA and the use of healthcare resources were assessed at baseline and three-monthly visits up to 1 year. We used regression models to associate costs, measured in 2012 Canadian dollars ($), with symptom control, adjusting for potential confounding variables. RESULTS The final sample included 517 individuals (average age 48.9, 65.8% female) with mostly mild-moderate asthma contributing 2033 follow-up visits. In 598 (29.4%), 809 (39.8%), and 626 (30.8%) of visits, asthma was symptomatically controlled, partially controlled, or uncontrolled, respectively. The average 3-month costs of asthma were $134.5. Of these, 20.5% were attributable to inpatient care, 47.8% to outpatient care, and 31.5% to medication. Compared to controlled asthma, partially controlled asthma was associated with a nonsignificant increase of $9.5 (95% CI -$13.6 - $32.6) in adjusted 3-month costs and uncontrolled asthma with a statistically significant increase of $81.7 (95% CI $48.5 - $114.9). CONCLUSION A substantial fraction of this population-based sample of largely mild-moderate asthmatics was symptomatically uncontrolled. Achieving symptom control was associated with a reduction in direct costs. The adjusted values from this study can be used to inform cost-effectiveness analyses of asthma treatments.
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Affiliation(s)
- M. Sadatsafavi
- Institute for Heart and Lung Health; Department of Medicine; The University of British Columbia; Vancouver BC Canada
- Centre for Clinical Epidemiology and Evaluation; The University of British Columbia; Vancouver BC Canada
| | - W. Chen
- Faculty of Pharmaceutical Sciences; The University of British Columbia; Vancouver BC Canada
| | - H. Tavakoli
- Institute for Heart and Lung Health; Department of Medicine; The University of British Columbia; Vancouver BC Canada
| | - J. D. Rolf
- Kelowna Allergy & Respirology Research; Kelowna BC Canada
| | - R. Rousseau
- Institute for Heart and Lung Health; Department of Medicine; The University of British Columbia; Vancouver BC Canada
| | - J. M. FitzGerald
- Institute for Heart and Lung Health; Department of Medicine; The University of British Columbia; Vancouver BC Canada
- Centre for Clinical Epidemiology and Evaluation; The University of British Columbia; Vancouver BC Canada
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Loriaut P, Casabianca L, Alkhaili J, Dallaudière B, Desportes E, Rousseau R, Massin P, Boyer P. Arthroscopic treatment of acute acromioclavicular dislocations using a double button device: Clinical and MRI results. Orthop Traumatol Surg Res 2015; 101:895-901. [PMID: 26545942 DOI: 10.1016/j.otsr.2015.09.024] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Revised: 08/26/2015] [Accepted: 09/08/2015] [Indexed: 02/02/2023]
Abstract
INTRODUCTION Arthroscopic treatment of acute grade 3 and 4 acromioclavicular dislocation is controversial, due to the risk of recurrence and of postoperative reduction defect. The purpose of the present study was to investigate whether the healing of the acromioclavicular (AC) and coracoclavicular (CC) ligaments and the accurate 3D positioning parameters of the AC joint using MRI were correlated with satisfactory functional outcome. MATERIAL Thirty-nine patients were enrolled from 2009 to 2011 and managed arthroscopically by CC lacing using a double-button device. METHODS Clinical assessment included the Shoulder and Hand (QuickDash) score, Constant-Murley score and visual analog scale (VAS) for residual pain. Time and rate to return to work and return to sport were assessed according to type of sport and work. Postoperative complications were recorded. Radiological examination consisted of anteroposterior clavicle and lateral axillary radiographs. AC ligament healing and 3D joint congruency were assessed on MRI and correlated to the clinical results. RESULTS Mean patient age was 35.7 years (range, 20-55). Mean follow-up was 42.3±10.6 months (range, 24-60). At final follow-up, mean QuickDash score, Constant score and VAS were respectively 1.7±4 (range, 0-11), 94.7±7.3 (range, 82-100) and 0.5±1.4 (range, 0-2). Thirty-five (90%) patients were able to resume work, including heavy manual labor, and sport. Radiology found accurate 3D joint congruency in 34 patients (87%) and CC and AC ligament healing in 36 (93%). Complications included reduction loss at 6 weeks in 3 patients, requiring surgical stabilization. Satisfactory functional results were associated with accurate AC joint congruency in the coronal and axial planes (P<0.05) and good AC and CC ligament healing (P<0.04). An initial 25% reduction defect in the coronal plane was not associated with poor functional results (P=0.07). CONCLUSION Arthroscopic treatment by CC lacing satisfactorily restored ligament and joint anatomy in the present series. These satisfactory anatomic results correlated with good clinical outcome encourage continuing with this technique. LEVEL OF EVIDENCE Level IV, therapeutic case series.
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Affiliation(s)
- P Loriaut
- Service de chirurgie orthopédique et de traumatologie, hôpital de la Pitié-Salpêtrière, université Pierre-et-Marie-Curie, 47, boulevard de l'Hôpital, 75013 Paris, France; Institut de chirurgie orthopédique, clinique des Lilas, 41-49, avenue du Maréchal-Juin, 93260 Les Lilas, France.
| | - L Casabianca
- Service de chirurgie orthopédique et de traumatologie, hôpital de la Pitié-Salpêtrière, université Pierre-et-Marie-Curie, 47, boulevard de l'Hôpital, 75013 Paris, France
| | - J Alkhaili
- Service de chirurgie orthopédique et de traumatologie, hôpitaux universitaires Paris Nord - Val-de-Seine, 46, rue Henri-Huchard, 75877 Paris cedex 18, France
| | - B Dallaudière
- Service de radiologie, clinique du sport, Bordeaux-Mérignac, 2, rue Negrevergne, 33700 Mérignac, France; Service de radiologie, hôpital Pellegrin, Bordeaux, place Amélie-Raba-Léon, 33076 Bordeaux, France
| | - E Desportes
- Service de radiologie, hôpitaux universitaires Paris Nord - Val-de-Seine, 46, rue Henri-Huchard, 75877 Paris cedex 18, France
| | - R Rousseau
- Service de chirurgie orthopédique et de traumatologie, hôpital de la Pitié-Salpêtrière, université Pierre-et-Marie-Curie, 47, boulevard de l'Hôpital, 75013 Paris, France
| | - P Massin
- Service de chirurgie orthopédique et de traumatologie, hôpitaux universitaires Paris Nord - Val-de-Seine, 46, rue Henri-Huchard, 75877 Paris cedex 18, France
| | - P Boyer
- Service de chirurgie orthopédique et de traumatologie, hôpitaux universitaires Paris Nord - Val-de-Seine, 46, rue Henri-Huchard, 75877 Paris cedex 18, France
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Fordyce L, Siemens A, Rousseau R, Becerra E. CPAP compliance – the first year and beyond. Sleep Med 2013. [DOI: 10.1016/j.sleep.2013.11.286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Antony R, Zagardo M, Gujrati M, Lin J, Antony R, Al-Rahawan M, Zagardo M, Gujrati M, Lin J, Broniscer A, Bhardwaj R, Hampton C, Ozols V, Chakravadhanula M, Bouffet E, Hawkins C, Scheinemann K, Zelcer S, Johnston D, Lafay-Cousin L, Larouche V, Jabado N, Carret AS, Hukin J, Eisenstat D, Pond G, Poskitt K, Wilson B, Bartels U, Tabori U, Dhall G, Haley K, Finlay J, Rushing T, Sposto R, Seeger R, Garvin J, Rupani K, Stark E, Anderson R, Feldstein N, Grill J, Hargrave D, Massimino M, Jaspan T, Varlet P, Jones C, Morgan P, Le Deley MC, Azizi A, Canete A, Bouffet E, Saran F, Bachir J, Bubuteishvili-Pacaud L, Rousseau R, Vassal G, Gupta S, Robinson N, Dhir N, Wong K, Zhou S, Finlay J, Dhall G, Kumabe T, Kawaguchi T, Saito R, Kanamori M, Yamashita Y, Sonoda Y, Tominaga T, Miyagawa T, Nwachukwu C, Youland R, Laack N, Filipek I, Drogosiewicz M, Polnik MP, Swieszkowska E, Dembowska-Baginska B, Jurkiewicz E, Perek D, Perek D, Dembowska-Baginska B, Drogosiewicz M, Polnik MP, Grajkowska W, Roszkowski M, Sobol G, Musiol K, Wachowiak J, Kazmierczak B, Pogorzelski JP, Mlynarski W, Szewczyk BZ, Wysocki M, Niedzielska E, Kowalczyk J, Slusarz HW, Balwierz W, Czepko EZ, Szolkiewicz A, Perek D, Perek-Polnik M, Dembowska-Baginska B, Drogosiewicz M, Grajkowska W, Lastowska M, Chojnacka M, Filipek I, Tarasinska M, Roszkowski M, Perreault S, Chao K, Ramaswamy V, Shih D, Remke M, Luu B, Schubert S, Fisher P, Partap S, Vogel H, Taylor M, Goumnerova L, Cho YJ, Robison N, Dhall G, Brown R, Cloughesy T, Davidson TB, Krieger M, Berger M, Wong K, Perry A, Gilles F, Finlay JL, Robison N, Dhir N, Khemani J, Wong K, Gupta S, Britt B, Grimm J, Finlay J, Dhall G, Ruge MI, Blau T, Hafkemeyer V, Hamisch C, Klinger K, Simon T, Sadighi Z, Ellezam B, Guindani M, Ater J, Shimizu Y, Arai H, Miyajima M, Shimoji K, Kondo A, Shinohara E, Perkins S, DeWees T, Slavc I, Chocholous M, Leiss U, Haberler C, Peyrl A, Azizi AA, Dieckmann K, Woehrer A, Dorfer C, Czech T, Spence T, Picard D, Barszczyk M, Kim SK, Ra YS, Fangusaro J, Toledano H, Nakamura H, Lafay-Cousin L, Fan X, Muraszko KM, Ng HK, Bouffet E, Halliday W, Shago M, Hawkins CE, Huang A, Suzuki M, Kondo A, Miyajima M, Arai H, van Zanten SV, Jansen M, van Vuurden D, Hulleman E, Idema S, Noske D, Wolf N, Hendrikse H, Vandertop P, Kaspers GJ, Muller K, Schlamann A, Warmuth-Metz M, Pietsch T, Pietschmann S, Kortmann RD, Kramm CM, von Bueren AO, Walston S, Williams T, Hamstra D, Oh K, Pelloski C, Zhukova N, Pole J, Mistry M, Fried I, Bartels U, Huang A, Lapperiere N, Dirks P, Scheinemann K, An J, Alon N, Nathan P, Greenberg M, Bouffet E, Malkin D, Hawkins C, Tabori U. PEDIATRICS CLINICAL RESEARCH. Neuro Oncol 2013; 15:iii165-iii172. [PMCID: PMC3823900 DOI: 10.1093/neuonc/not185] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023] Open
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Pichot C, Picoche A, Saboya-Steinbach MI, Rousseau R, de Guys J, Lahmar M, Thomas D, Guerry M, Lalot JM, Monarchi R, Galliez M, Ghignone M, Quintin L. Combination of clonidine sedation and spontaneous breathing-pressure support upon acute respiratory distress syndrome: a feasibility study in four patients. Acta Anaesthesiol Belg 2012; 63:127-133. [PMID: 23397665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
INTRODUCTION As alpha-2 agonists preserve ventilator drive, patients presenting with acute respiratory distress syndrome (ARDS, Pa02/FiO2 < 200) were managed using sedation with an alpha-2 agonist, clonidine, combined to spontaneous ventilation (SV) + pressure support ventilation (PS). METHODS Sedation was provided by an alpha-2 agonist, clonidine 1-2 microg x kg(-1( x h(-1), without bolus administration, and supplemented with a neuroleptic, loxapine, if needed. Four patients presenting with ARDS were managed with pressure support ventilation (PS = 8 cm H20,rarely 10-12 cm H20) and high PEEP (10-20 cm H20). Energy requirements were minimized, if appropriate, with hypothermia caused by extra-renal replacement therapy or intentional hypothermia (35-36 degrees C). Repeated echocardiographic examinations revealed no right ventricular failure. RESULTS Recovery of ARDS, i.e. sustained increase of P/F > 200 for > 24 h, was observed, over 2-5 days. CONCLUSION Use of an alpha-2 agonist as first-line sedative agent led to absence of respiratory depression and spontaneous ventilation. Upon ARDS, the lowered intrathoracic pressure observed with SV+PSV allowed one to recruit alveoli with high levels of PEEP, without impairing right ventricle function.
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Affiliation(s)
- C Pichot
- Critical Care, Epinal Hospital, Epinal, France
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Tauszig-Delamasure S, Bouzas-Rodriguez J, Delloye-Bourgeois C, Cabrera J, Ichim G, Raquin M, Rousseau R, Combaret V, Bénard J, Mehlen P. 372 Neurotrophin-3 production promotes human neuroblastoma cell survival by inhibiting the dependence receptor TrkC-induced apoptosis. EJC Suppl 2010. [DOI: 10.1016/s1359-6349(10)71173-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Paillard C, Salmon A, Curtillet C, David A, Halle P, Cachin F, Bordigoni P, Michel G, Rousseau R, Dore E, Isfan F, Merlin E, Rochette E, Demeocq F, Kanold J. Evidence of a clinical response at one yr after reduced-intensity allogeneic hematopoietic stem cell transplantation in heavily pretreated adolescents with aggressive refractory Hodgkin's lymphoma. Pediatr Transplant 2010; 14:109-14. [PMID: 19490483 DOI: 10.1111/j.1399-3046.2009.01140.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report results of RIC AHSCT in four adolescents with aggressive refractory HL. They all received three or four lines of therapy prior to RIC-AHSCT including autografts. At the time of RIC, they were in partial response except for one patient who had progressive chemoresistant disease. The conditioning regimen consisted of fludarabin, busulfan and ATG. They all had a matched related donor. The median follow-up was 12-16-month post-allograft. All patient transplants engrafted rapidly. The median time of hospitalization was 35 days. The median time to neutrophil recovery (>or=500/muL) was 19 days. All the patients were in complete donor chimerism at day 60. Four patients developed skin (grade <or= II) acute GvHD. All responded and all are alive. Two patients are in CR, one in PR and one relapsed six months after grafting after a PR. Each of the patients in PR received two DLI. These observations, together with the responses after DLI, suggest the presence of a graft vs. lymphoma effect in patients with advanced active HL. Prospective studies are needed to identify the patients likely to benefit most from this treatment approach.
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Affiliation(s)
- C Paillard
- Centre Hospitalier et Universitaire de Clermont-Ferrand, Service de Pédiatrie B et Unité Bioclinique de Thérapie Cellulaire, Clermont-Ferrand, France.
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Dutour A, Decouveleare A, Josserand V, Coll J, Chotel F, Rousseau R. Improving the detection of osteosarcoma tumor margins and metastasis using diagnostic nanoparticles. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.10512] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
10512 Background: The aim of osteosarcoma resection is the complete removal of the primary malignant lesion with adequate margins taking into account tumor control and functional reconstruction. To date, no intraoperative method is available to assist surgeons in precisely delineating tumor extension in the adjacent normal tissues. Thus, preoperative imaging and extended surgical resection remains the gold standard. We developed fluorescent nanoparticles RAFT-cRGD4-ICG’ targeting αVβ3 integrins on tumor neovessels and demonstrated their capacity to reveal tumor and its margins when exposed to near infrared (NIR) light. Methods: We evaluated in an orthotopic metastatic osteosarcoma in rats the potential of RAFT-cRGD4-ICG’ detected intra operatively by NIR illumination to improve margin resection without compromising local tumor control. Controls consisted of pathological margin analysis of the resected tumor/metastasis comparing ICG’ fluorescence with conventional tissue coloration, and pre operative magnetic resonance imaging. Results: We showed a significantly lesser extent of healthy tissue resection after surgical excision when assessing tumor margin intra operatively using RAFT-cRGD4-ICG’ and NIR camera compared to preoperative imaging studies and post operative conventional pathology coloration (p<0.01). Importantly, intraoperative NIR illumination of lungs revealed more metastases than by intraoperative manual lung palpation (p<0.01). Conclusions: Our preclinical data confirm the potential of intraoperative imaging for improved primary tumor and lung metastasis excision. We are now generating clinical-grade RAFT-cRGD4-ICG’ to further evaluate this approach as a mean to improve functional outcome after surgical excision while maintaining tumor control in patients with relapsed/metastatic osteosarcoma. No significant financial relationships to disclose.
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Affiliation(s)
- A. Dutour
- Centre Léon Bérard, Lyon, France; Université Joel Fournier, Grenoble, France; HFME, Lyon, France
| | - A. Decouveleare
- Centre Léon Bérard, Lyon, France; Université Joel Fournier, Grenoble, France; HFME, Lyon, France
| | - V. Josserand
- Centre Léon Bérard, Lyon, France; Université Joel Fournier, Grenoble, France; HFME, Lyon, France
| | - J. Coll
- Centre Léon Bérard, Lyon, France; Université Joel Fournier, Grenoble, France; HFME, Lyon, France
| | - F. Chotel
- Centre Léon Bérard, Lyon, France; Université Joel Fournier, Grenoble, France; HFME, Lyon, France
| | - R. Rousseau
- Centre Léon Bérard, Lyon, France; Université Joel Fournier, Grenoble, France; HFME, Lyon, France
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Kanold J, Paillard C, Tchirkov A, Merlin E, Marabelle A, Lutz P, Rousseau R, Baldomero H, Deméocq F. Allogeneic or haploidentical HSCT for refractory or relapsed solid tumors in children: toward a neuroblastoma model. Bone Marrow Transplant 2008; 42 Suppl 2:S25-30. [DOI: 10.1038/bmt.2008.279] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [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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Cossaro A, Mazzarello R, Rousseau R, Casalis L, Verdini A, Kohlmeyer A, Floreano L, Scandolo S, Morgante A, Klein ML, Scoles G. X-ray Diffraction and Computation Yield the Structure of Alkanethiols on Gold(111). Science 2008; 321:943-6. [DOI: 10.1126/science.1158532] [Citation(s) in RCA: 269] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- A. Cossaro
- Istituto Nazionale per la Fisica della Materia–Consiglio Nazionale delle Ricerche (INFM-CNR) Laboratorio TASC, I-34012 Trieste, Italy
- International School for Advanced Studies, I-34014 Trieste, Italy
- Sincrotrone Trieste S.C.p.A., I-34012 Trieste, Italy
- Center for Molecular Modeling and Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA
- Abdus Salam International Centre for Theoretical Physics and INFM/Democritos National Simulation Center, I-34014 Trieste, Italy
| | - R. Mazzarello
- Istituto Nazionale per la Fisica della Materia–Consiglio Nazionale delle Ricerche (INFM-CNR) Laboratorio TASC, I-34012 Trieste, Italy
- International School for Advanced Studies, I-34014 Trieste, Italy
- Sincrotrone Trieste S.C.p.A., I-34012 Trieste, Italy
- Center for Molecular Modeling and Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA
- Abdus Salam International Centre for Theoretical Physics and INFM/Democritos National Simulation Center, I-34014 Trieste, Italy
| | - R. Rousseau
- Istituto Nazionale per la Fisica della Materia–Consiglio Nazionale delle Ricerche (INFM-CNR) Laboratorio TASC, I-34012 Trieste, Italy
- International School for Advanced Studies, I-34014 Trieste, Italy
- Sincrotrone Trieste S.C.p.A., I-34012 Trieste, Italy
- Center for Molecular Modeling and Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA
- Abdus Salam International Centre for Theoretical Physics and INFM/Democritos National Simulation Center, I-34014 Trieste, Italy
| | - L. Casalis
- Istituto Nazionale per la Fisica della Materia–Consiglio Nazionale delle Ricerche (INFM-CNR) Laboratorio TASC, I-34012 Trieste, Italy
- International School for Advanced Studies, I-34014 Trieste, Italy
- Sincrotrone Trieste S.C.p.A., I-34012 Trieste, Italy
- Center for Molecular Modeling and Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA
- Abdus Salam International Centre for Theoretical Physics and INFM/Democritos National Simulation Center, I-34014 Trieste, Italy
| | - A. Verdini
- Istituto Nazionale per la Fisica della Materia–Consiglio Nazionale delle Ricerche (INFM-CNR) Laboratorio TASC, I-34012 Trieste, Italy
- International School for Advanced Studies, I-34014 Trieste, Italy
- Sincrotrone Trieste S.C.p.A., I-34012 Trieste, Italy
- Center for Molecular Modeling and Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA
- Abdus Salam International Centre for Theoretical Physics and INFM/Democritos National Simulation Center, I-34014 Trieste, Italy
| | - A. Kohlmeyer
- Istituto Nazionale per la Fisica della Materia–Consiglio Nazionale delle Ricerche (INFM-CNR) Laboratorio TASC, I-34012 Trieste, Italy
- International School for Advanced Studies, I-34014 Trieste, Italy
- Sincrotrone Trieste S.C.p.A., I-34012 Trieste, Italy
- Center for Molecular Modeling and Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA
- Abdus Salam International Centre for Theoretical Physics and INFM/Democritos National Simulation Center, I-34014 Trieste, Italy
| | - L. Floreano
- Istituto Nazionale per la Fisica della Materia–Consiglio Nazionale delle Ricerche (INFM-CNR) Laboratorio TASC, I-34012 Trieste, Italy
- International School for Advanced Studies, I-34014 Trieste, Italy
- Sincrotrone Trieste S.C.p.A., I-34012 Trieste, Italy
- Center for Molecular Modeling and Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA
- Abdus Salam International Centre for Theoretical Physics and INFM/Democritos National Simulation Center, I-34014 Trieste, Italy
| | - S. Scandolo
- Istituto Nazionale per la Fisica della Materia–Consiglio Nazionale delle Ricerche (INFM-CNR) Laboratorio TASC, I-34012 Trieste, Italy
- International School for Advanced Studies, I-34014 Trieste, Italy
- Sincrotrone Trieste S.C.p.A., I-34012 Trieste, Italy
- Center for Molecular Modeling and Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA
- Abdus Salam International Centre for Theoretical Physics and INFM/Democritos National Simulation Center, I-34014 Trieste, Italy
| | - A. Morgante
- Istituto Nazionale per la Fisica della Materia–Consiglio Nazionale delle Ricerche (INFM-CNR) Laboratorio TASC, I-34012 Trieste, Italy
- International School for Advanced Studies, I-34014 Trieste, Italy
- Sincrotrone Trieste S.C.p.A., I-34012 Trieste, Italy
- Center for Molecular Modeling and Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA
- Abdus Salam International Centre for Theoretical Physics and INFM/Democritos National Simulation Center, I-34014 Trieste, Italy
| | - M. L. Klein
- Istituto Nazionale per la Fisica della Materia–Consiglio Nazionale delle Ricerche (INFM-CNR) Laboratorio TASC, I-34012 Trieste, Italy
- International School for Advanced Studies, I-34014 Trieste, Italy
- Sincrotrone Trieste S.C.p.A., I-34012 Trieste, Italy
- Center for Molecular Modeling and Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA
- Abdus Salam International Centre for Theoretical Physics and INFM/Democritos National Simulation Center, I-34014 Trieste, Italy
| | - G. Scoles
- Istituto Nazionale per la Fisica della Materia–Consiglio Nazionale delle Ricerche (INFM-CNR) Laboratorio TASC, I-34012 Trieste, Italy
- International School for Advanced Studies, I-34014 Trieste, Italy
- Sincrotrone Trieste S.C.p.A., I-34012 Trieste, Italy
- Center for Molecular Modeling and Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA
- Abdus Salam International Centre for Theoretical Physics and INFM/Democritos National Simulation Center, I-34014 Trieste, Italy
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Marabelle A, Merlin E, Halle P, Riquet C, Stephan J, Rousseau R, Leverger G, Demeocq F, Kanold J. SFRP-P09 – Recherche clinique – Intérêt de la purge de greffon autologue dans le traitement des neuroblastomes à haut risque. Arch Pediatr 2008. [DOI: 10.1016/s0929-693x(08)72438-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Ndongmouo UFT, Lee MS, Rousseau R, Baletto F, Scandolo S. Finite-Temperature Effects on the Stability and Infrared Spectra of HCl(H2O)6 Clusters. J Phys Chem A 2007; 111:12810-5. [DOI: 10.1021/jp0765603] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- U. F. T. Ndongmouo
- The Abdus Salam International Centre for Theoretical Physics, Trieste, I-34014 Italy, Centre for modeling and simulation, and Department of Physics, University of Pune, Ganeshkhind, Pune 411 007, India, International School For Advanced Studies (SISSA), Trieste, I-34014 Italy, DMSE-MIT, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, and INFM/CNR “Democritos” National Simulation Center, Trieste, Italy
| | - M.-S. Lee
- The Abdus Salam International Centre for Theoretical Physics, Trieste, I-34014 Italy, Centre for modeling and simulation, and Department of Physics, University of Pune, Ganeshkhind, Pune 411 007, India, International School For Advanced Studies (SISSA), Trieste, I-34014 Italy, DMSE-MIT, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, and INFM/CNR “Democritos” National Simulation Center, Trieste, Italy
| | - R. Rousseau
- The Abdus Salam International Centre for Theoretical Physics, Trieste, I-34014 Italy, Centre for modeling and simulation, and Department of Physics, University of Pune, Ganeshkhind, Pune 411 007, India, International School For Advanced Studies (SISSA), Trieste, I-34014 Italy, DMSE-MIT, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, and INFM/CNR “Democritos” National Simulation Center, Trieste, Italy
| | - F. Baletto
- The Abdus Salam International Centre for Theoretical Physics, Trieste, I-34014 Italy, Centre for modeling and simulation, and Department of Physics, University of Pune, Ganeshkhind, Pune 411 007, India, International School For Advanced Studies (SISSA), Trieste, I-34014 Italy, DMSE-MIT, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, and INFM/CNR “Democritos” National Simulation Center, Trieste, Italy
| | - S. Scandolo
- The Abdus Salam International Centre for Theoretical Physics, Trieste, I-34014 Italy, Centre for modeling and simulation, and Department of Physics, University of Pune, Ganeshkhind, Pune 411 007, India, International School For Advanced Studies (SISSA), Trieste, I-34014 Italy, DMSE-MIT, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, and INFM/CNR “Democritos” National Simulation Center, Trieste, Italy
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Dutour A, Leclers D, Monteil J, Paraf F, Charissoux JL, Rousseau R, Rigaud M. Non-invasive imaging correlates with histological and molecular characteristics of an osteosarcoma model: application for early detection and follow-up of MDR phenotype. Anticancer Res 2007; 27:4171-4178. [PMID: 18225588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
BACKGROUND In an orthotopic rat osteosarcoma model, histological and molecular findings were compared with the results of non-invasive imaging methods to assess disease progression at the primary site, the pattern of metastatic dissemination and the chemoresistance phenotype. MATERIALS AND METHODS Primary tumor engraftment, vascularization, growth and metastatic spread were evaluated using 18FDG tomoscintigraphy. Bone neoformation in the primary tumor and metastasis was determined using 18FNa confirmed by classical histological studies. Chemoresistance phenotype was assessed by analysis of MDR1 and MRP1 genes expression compared to 99mTc MIBI imaging. RESULTS 99mTc MIBI imaging correlated with the overexpression of the MDR1 and MRP1 genes. 18FDG, 18FNa and 99mTc tomoscintigraphies revealed that the pattern of vascularization, bone neoformation and hematogeneous metastatic dissemination in our animal model mimics its human counterpart. CONCLUSION Multimodality, non-invasive imaging is a valid surrogate marker of histological and molecular characteristics in an orthotopic osteosarcoma model in immunocompetent rats; it allows extensive in vivo follow-up of osteosarcoma, including longitudinal analysis of chemoresistance.
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Affiliation(s)
- A Dutour
- Department of Medical Biochemistry, School of Medicine, University of Limoges, France
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Dutour A, Lee D, Napier S, Yvon E, Finney H, Brenner M, Rousseau R. Anti-leukemia activity of CD33-specific chimeric cytotoxic T lymphocytes in vitro and in vivo is impaired by addition of the CD28 costimulatory endodomain. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.3052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
3052 Background: EBV-specific cytotoxic T cells (EBV-CTLs) expand and have long-term activity in vivo due to the sustained costimulation provided by the EBV-infected cells produced by this persistent virus. We exploited this phenomenon and redirected EBV-CTLs against CD33, a surface protein expressed on the malignant blasts of acute myeloid leukemia (AML) cells. Methods: EBV-CTLs generated from six EBV-seropositive donors were transduced using a retroviral vector encoding CD33 specific chimeric receptor (cR). We evaluated whether the high and sustained activity shown against native EBV+ target cells can be extended to the CD33+ EBV- targets of the chimeric receptor and whether the addition of CD28 signaling domain improved the receptor activity. Results: cRCD33-EBV-CTL maintained killed EBV-LCL and CD33+ targets (specific lysis respectively of 30% and 35% at E:T ratio 25:1). They produced Th-1, Th-2 and Tc cytokines on exposure to CD33+ targets. Addition of the CD28 intracellular domain did not increase cytotoxicity to CD33+ targets. Preincubation of CD33+ cells with the CD33-blocking MoAb resulted in up to 40% inhibition of lysis and up to 60% inhibition of cytokine release by cRCD33-EBV-CTLs confirming the specificity of the TCR interactions with CD33. NOD-SCID mice bearing a human CD33+ AML were injected with EBV-CTLs ×4 weekly starting 5 days after tumor inoculation. Significant tumor reduction was only observed in mice treated with the cRCD33-EBV-CTLs (p<0.05). Immunohistologic analysis showed the presence of a majority of CD8+ human T cells in the tumors of treated mice. Incorporation of the CD28 endodomain resulted in less tumor-infiltrating T cells in mice treated with cRCD33CD28-EBV-CTLs. There was no significant difference in the chemokines receptor expression on cRCD33CD28-EBV-CTLs but their rate of apoptosis was 16 % higher (p<0.05) than the one of cRCD33-EBV-CTLs. Conclusions: EBV- CTL expressing the CD33 chimeric receptor are functional in vitro and in vivo in mice. CD28 signaling may have a deleterious role for the activity of chimeric receptors in vivo. No significant financial relationships to disclose.
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Affiliation(s)
- A. Dutour
- Centre Leon Berard, Lyon, France; MD Anderson Cancer Center, Houston, TX; Baylor College of Medicine, Houston, TX; Celltech Ltd, Slough, United Kingdom
| | - D. Lee
- Centre Leon Berard, Lyon, France; MD Anderson Cancer Center, Houston, TX; Baylor College of Medicine, Houston, TX; Celltech Ltd, Slough, United Kingdom
| | - S. Napier
- Centre Leon Berard, Lyon, France; MD Anderson Cancer Center, Houston, TX; Baylor College of Medicine, Houston, TX; Celltech Ltd, Slough, United Kingdom
| | - E. Yvon
- Centre Leon Berard, Lyon, France; MD Anderson Cancer Center, Houston, TX; Baylor College of Medicine, Houston, TX; Celltech Ltd, Slough, United Kingdom
| | - H. Finney
- Centre Leon Berard, Lyon, France; MD Anderson Cancer Center, Houston, TX; Baylor College of Medicine, Houston, TX; Celltech Ltd, Slough, United Kingdom
| | - M. Brenner
- Centre Leon Berard, Lyon, France; MD Anderson Cancer Center, Houston, TX; Baylor College of Medicine, Houston, TX; Celltech Ltd, Slough, United Kingdom
| | - R. Rousseau
- Centre Leon Berard, Lyon, France; MD Anderson Cancer Center, Houston, TX; Baylor College of Medicine, Houston, TX; Celltech Ltd, Slough, United Kingdom
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Mazzarello R, Cossaro A, Verdini A, Rousseau R, Casalis L, Danisman MF, Floreano L, Scandolo S, Morgante A, Scoles G. Structure of a CH3S monolayer on Au(111) solved by the interplay between molecular dynamics calculations and diffraction measurements. Phys Rev Lett 2007; 98:016102. [PMID: 17358489 DOI: 10.1103/physrevlett.98.016102] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2006] [Indexed: 05/02/2023]
Abstract
We have investigated the controversy surrounding the (sqrt[3] x sqrt[3]) R30 degrees structure of self-assembled monolayers of methylthiolate on Au(111) by first principles molecular dynamics simulations, energy and angle resolved photoelectron diffraction, and grazing incidence x-ray diffraction. Our simulations find a dynamic equilibrium between bridge site adsorption and a novel structure where 2 CH3S radicals are bound to an Au adatom that has been lifted from the gold substrate. As a result, the interface is characterized by a large atomic roughness with both adatoms and vacancies. This result is confirmed by extensive photoelectron and grazing incidence x-ray diffraction measurements.
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Affiliation(s)
- R Mazzarello
- International School for Advanced Studies, Trieste, Italy
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Rousseau R, Valsesia-Wittmann S, Combaret V. Neuroblastome de l’enfant: challenges et perspectives. ONCOLOGIE 2006. [DOI: 10.1007/s10269-006-0483-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Taylor C, Corey M, Zielenski J, Breaton J, Rousseau R, VanSpall M, Christofi M, Frangolias D, Dorfman R, Sang R, Sandford A, Pare P, Durie P. Phenotype Definition for the Analysis of Modifier Genes in Cystic Fibrosis. Am J Epidemiol 2006. [DOI: 10.1093/aje/163.suppl_11.s128-d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Rousseau R, De Renzi V, Mazzarello R, Marchetto D, Biagi R, Scandolo S, del Pennino U. Interfacial Electrostatics of Self-Assembled Monolayers of Alkane Thiolates on Au(111): Work Function Modification and Molecular Level Alignments. J Phys Chem B 2006; 110:10862-72. [PMID: 16771338 DOI: 10.1021/jp061720g] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have isolated at T < 150 K a weakly adsorbed dimethyl disulfide (DMDS) layer on Au(111) and studied how the vibrational states, S core hole level shifts, valence band photoemission, and work function measurements evolve upon transforming this system into chemisorbed methylthiolate (MT) self-assembled monolayers (SAM) by heating above 200 K. By combining these observations with detailed theoretical electronic structure simulations, at the density functional level, we have been able to obtain a detailed picture of the electronic interactions at the interface between Au and adsorbed thiolates and disulfides. All of our measurements may be interpreted with a simple model where MT is bound to the Au surface with negligible charge transfer. Interfacial dipoles arising from Pauli repulsion between molecule and metal surface electrons are present for the weakly adsorbed DMDS layer but not for the chemisorbed species. Instead, for the chemisorbed species, interfacial dipoles are exclusively controlled by the molecular dipole, its interaction with the dipoles on neighboring molecules, and its orientation to the surface. The ramifications of these results for alignment of molecular levels and interfacial properties of this class of materials are discussed.
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Affiliation(s)
- R Rousseau
- International School for Advanced Studies, 2-4 Via Beirut, 34014 Trieste, Italy
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De Renzi V, Rousseau R, Marchetto D, Biagi R, Scandolo S, Del Pennino U. Metal work-function changes induced by organic adsorbates: a combined experimental and theoretical study. Phys Rev Lett 2005; 95:046804. [PMID: 16090833 DOI: 10.1103/physrevlett.95.046804] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2005] [Indexed: 05/03/2023]
Abstract
The role of molecular dipole moment, charge transfer, and Pauli repulsion in determining the work-function change (Deltaphi) at organic-metal interfaces has been elucidated by a combined experimental and theoretical study of (CH(3)S)(2)/Au(111) and CH(3)S/Au(111). Comparison between experiment and theory allows us to determine the origin of the interface dipole layer for both phases. For CH(3)S/Au(111), Deltaphi can be ascribed almost entirely to the dipole moment of the CH(3)S layer. For (CH(3)S)(2)/Au(111), a Pauli repulsion mechanism occurs. The implications of these results on the interpretation of Deltaphi in the presence of strongly and weakly adsorbed molecules is discussed.
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Affiliation(s)
- V De Renzi
- INFM Center for nanoStructures and bioSystem at Surfaces and Dipartimento di Fisica, Università di Modena e Reggio Emilia, Modena, Italy.
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Jobidon * ME, Rousseau R, Breton R. The effect of variability in temporal information on the control of a dynamic task. Theoretical Issues in Ergonomics Science 2005. [DOI: 10.1080/14639220512331311562] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Bottin MC, Vigneron JC, Rousseau R, Micillino JC, Eypert-Blaison C, Kauffer E, Martin P, Binet S, Rihn BH. Man-made mineral fiber hazardous properties assessment using transgenic rodents: example of glass fiber testing. Inhal Toxicol 2003; 15:1017-27. [PMID: 12928977 DOI: 10.1080/08958370390226404] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Transgenic BigBlue rats were exposed to CM 44 glass fibers (6.3 mg/m3) by nose only, 6 h/day for 5 days. Two endpoints were examined 1, 3, 14, 28, and 90 days following exposure: fiber biopersistence and mutations in lung DNA. The half-time of the fibers >20 microm was 12.8 days, and mutant frequencies of control and exposed rats were similar across all time points. The mutation spectra of both series were similar after 28 days of fixation time. These results showed that a glass fiber with a high clearance in the lung seems to not present any significant effect on mutagenesis on lung DNA and are in marked contrast to results for asbestos, which caused a twofold mutant frequency increase as described in a previous study.
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Affiliation(s)
- M C Bottin
- Institut National de Recherche et de Sécurité, Vandoeuvre Cedex, France
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Egghe L, Rousseau R. BRS-compactness in networks: Theoretical considerations related to cohesion in citation graphs, collaboration networks and the internet. ACTA ACUST UNITED AC 2003. [DOI: 10.1016/s0895-7177(03)00091-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Rousseau R, Bollard C, Heslop H. [Contribution of antineoplastic biotherapy in the treatment of leukemia in children]. Arch Pediatr 2002; 9:289-306. [PMID: 11938542 DOI: 10.1016/s0929-693x(01)00767-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Improvements in the chemotherapeutic and transplant regimens have had a significant impact in improving survival rates for pediatric leukemia. However, there are still major problems to address including what options are available for patients with chemoresistant disease and what strategies are available to avoid toxicity associated with highly cytotoxic treatment regimens. Gene and immunotherapy protocols hold great promise. Using gene transfer of a marker gene, a number of biologic issues in the therapy of leukemia have been addressed. For example, by gene marking autologous bone marrow grafts it has been possible to demonstrate that infused marrow contributes to relapse in acute and chronic myeloid leukemias. In the allogeneic transplant setting, genetically modified T-cells have proven valuable for the prophylaxis and treatment of viral diseases and may have an important role in preventing or treating disease relapse. Gene transfer is also being used to modify tumor function, enhance immunogenicity, and confer drug-resistance to normal hematopoietic stem cells. With the continued scientific advancements in this field, gene therapy will almost certainly have a major impact on the treatment of pediatric leukemia in the future.
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Affiliation(s)
- R Rousseau
- Center for Cell and Gene Therapy, Texas Children's Cancer Center, Baylor College of Medicine, Houston, Texas, USA.
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Abstract
The total electronic energies of the six electrons per atom (e per atom) alloys W, TaRe, HfOs, and YIr and the seven electrons per atom alloys Re, WOs, TaIr, HfPt, and YAu have been calculated in the local density approximation of density functional theory. When one considers common alloy structures such as atomically ordered variants of the body-centered cubic, face-centered cubic, or hexagonally closest packed structures and plots the total electronic energy as a function of the unit cell parameter, one finds for both the six and seven electrons per atom series energetic isosbestic points. An energetic isosbestic point corresponds to a critical value of the size parameter for which all members of the 6 or 7 e per atom series of compounds have nearly identical total electronic energy. Just as in spectroscopy, where the existence of such isosbestic points is the hallmark of two compounds present in the mixture, an energy isosbestic point implies there are just two separate energy curves. For both series it is found that the total electronic energy can be viewed as the weighted sum of a purely covalent term and a purely ionic term. Two semi-quantitative models are proposed to account for these two separate energies. In the first model the total energy is viewed as the sum of the elemental structural energy plus an ionic energy based on the Born-Mayer ionic model. In the second model one considers within the confines of mu2-Hückel theory the evolution of the total electronic energy as the Coulombic Hii integrals change in value.
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Affiliation(s)
- E Todorov
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853-1301, USA
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Alavi S, Rousseau R, Lopinski GP, Wolkow RA, Seideman T. Controlling organic reactions on silicon surfaces with a scanning tunneling microscope: theoretical and experimental studies of resonance-mediated desorption. Faraday Discuss 2001:213-29; discussion 257-75. [PMID: 11271993 DOI: 10.1039/b004093m] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The dynamics of tip-induced, resonance-mediated bond-breaking in complex organic adsorbates is studied theoretically and experimentally. Desorption of benzene from a Si(100) surface is found to be efficient and sensitive to voltage, the measured yield rising from below 10(-10) to ca. 10(-6) per electron within a ca. 0.8 V range at low (< 100 pA) current. A theoretical model, based upon first principles electronic structure calculations and quantum mechanical wavepacket simulations, traces these observations to multi-mode dynamics triggered by a transition into a cationic resonance. The model is generalized to provide understanding of, and suggest a means of control over, the behaviour of different classes of organic adsorbates under tunneling current.
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Affiliation(s)
- S Alavi
- Steacie Institute for Molecular Sciences, National Research Council of Canada, Ottawa, Ontario, K1A 0R6, Canada
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Alavi S, Rousseau R, Patitsas SN, Lopinski GP, Wolkow RA, Seideman T. Inducing desorption of organic molecules with a scanning tunneling microscope: theory and experiments. Phys Rev Lett 2000; 85:5372-5375. [PMID: 11135999 DOI: 10.1103/physrevlett.85.5372] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2000] [Indexed: 05/23/2023]
Abstract
A scanning-tunneling microscope has been used to induce efficient local desorption of benzene from Si(100) at low currents (<100 pA), sample biases (approximately -2.4 V) and temperatures (22 K). A theoretical model based upon first principles electronic structure calculations and quantum mechanical wave packet dynamics describes this process as occurring via transient ionization of a pi state of the adsorbed molecule. This model accounts for the unexpected efficiency and sharp threshold of the yield.
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Affiliation(s)
- S Alavi
- Steacie Institute for Molecular Sciences, National Research Council of Canada, Ottawa, Ontario, K1A 0R6
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Rousseau R, Soria JC. [Telomerase, a universal target in immunotherapy strategies against tumor?]. Bull Cancer 2000; 87:895-901. [PMID: 11174119] [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: 02/18/2023]
Abstract
Generating an antitumor immune response in tumor-bearing host has been impaired by several characteristics of both patient and tumor cells. Amongst those requirements is the necessity of generating immune effectors that are specific to tumor cells. The last two decades have seen the description of many so called tumor "specific" antigens. Indeed, strictly specific tumor antigens are scarce. Most antigens are tumor-associated antigens, also shared by normal tissues. Telomerase and its activity have recently been recognized as a major marker of tumoral growth in more than 80% of cancers. Some telomerase subunits might be ideal, if not universal, targets to an antitumor immune response in patients with cancer. Many other major parameters remain to be understood and to be mastered. Nevertheless, experiments reported in this overview give hope to the possibility of generating an immune response aimed at elements of telomerase, both in healthy subjects and in patients with advanced disease.
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Affiliation(s)
- R Rousseau
- Center for Cell and Gene Therapy, Baylor College of Medicine, Texas Children's Cancer Center, Houston, Texas, USA.
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Abstract
Clusters of lithium atoms ranging in size from Li4 to Li40 and bulk metallic solids, including surfaces, are investigated through first principles electronic structure calculations, which are based upon density functional theory and the electron localization function (ELF). It is found that large lithium ppi-type contributions in the electronic wavefunction cause the electrons to localize in interstitial regions, which leads to multicenter bonding for both the clusters and the solids, including their surfaces. For the smaller clusters these stabilizing ppi interactions also lead to short Li-Li interatomic distances, which in conjunction with the longer bonds induces "distance alternation" in the range from 2.45 A to 3.15 A. This consequence of the additional ppi interactions is absent in simple solids due to symmetry. The electronic structure of the clusters is topologically insensitive to deformations that do not affect their general shape, but changes significantly upon isomerization. The ramifications upon dynamic properties is that the clusters are quasi-rigid at low temperatures and retain their shape though the distance alternation pattern is suppressed. The picture which emerges for bonding in the bulk solid is that the metallic state arises from the presence of a large number of partially occupied multicenter bonds. For nanoscale clusters only the surface of these clusters exhibits strong localization, whereas their interiors display localization properties similar to the bulk metallic solid. On the other hand, localized states similar to those of the clusters ("dangling bonds") are found on the (001) surface of body-centered cubic (bcc) and face-centered cubic (fcc) lithium solids.
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Affiliation(s)
- R Rousseau
- Steacie Institute for Molecular Science, National Research Council of Canada, Ottawa, Ontario
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Rousseau R, Boero M, Bernasconi M, Parrinello M, Terakura K. Ab initio simulation of phase transitions and dissociation of H2S at high pressure. Phys Rev Lett 2000; 85:1254-1257. [PMID: 10991525 DOI: 10.1103/physrevlett.85.1254] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2000] [Indexed: 05/23/2023]
Abstract
By ab initio constant pressure molecular dynamics, we have identified the structure of phase V and phase VI of H2S at 35 and 65 GPa, respectively. The theoretical IR spectra of both phases are consistent with experimental findings and support our proposed structural models. We find that phase V is characterized by the presence of charged SH+3 and SH- species which are created and destroyed dynamically, whereas phase VI is no longer a molecular phase but consists of sheets of S with the majority of H intercalated between the layers. The stability of the two phases with respect to dissociation into elemental crystalline hydrogen and sulfur is discussed.
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Affiliation(s)
- R Rousseau
- Max-Planck-Institut fur Festkorperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany and Steacie Institute for Molecular Sciences, National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario, Canada K1A 0R6
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Tse JS, Uehara K, Rousseau R, Ker A, Ratcliffe CI, White MA, MacKay G. Structural principles and amorphouslike thermal conductivity of Na-doped Si clathrates. Phys Rev Lett 2000; 85:114-117. [PMID: 10991172 DOI: 10.1103/physrevlett.85.114] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2000] [Indexed: 05/23/2023]
Abstract
The postulated low thermal conductivity and the possibility of altering the electronic conductivity of metal-doped clathrates with semiconducting host elements have stimulated great interest in exploring these compounds as promising thermoelectric materials. The electronic and thermal properties of the prototypical Na xSi (46) system are studied in detail here. It is shown that, despite the fact that the Na/Si clathrate is metallic, its thermal conductivity resembles that of an amorphous solid. A theoretical model is developed to rationalize the structural stability of the peculiar structural topology, and a general scheme for rational design of high efficiency thermoelectric materials is presented.
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Affiliation(s)
- JS Tse
- Steacie Institute for Molecular Sciences, National Research Council of Canada, Ottawa, Ontario, Canada K1A 0R6
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Abstract
A temporal reproduction task is composed of two temporal estimation phases: encoding of the interval to be reproduced, followed by its reproduction. The effect of short-term memory processing on each of these phases was tested in two experiments. In Exp. 1, a memory set was presented, followed by two successive tones bounding the target interval to be reproduced. During the reproduction of the target interval, a probe was presented, and the subject ended the reproduction by pressing one of two keys, depending on the presence or absence of the probe in the memory set. In Exp. 2, probe recognition was required during the encoding of the interval to be reproduced. Whereas in Exp. 1 reproductions lengthened as a function of memory-set size, in Exp. 2 temporal reproductions decreased with set size. These results support attentional models of time estimation and suggest that short-term memory processing interrupts concurrent accumulation of temporal information.
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Affiliation(s)
- C Fortin
- Ecole de psychologie, Université Laval, Québec, Canada.
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