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Pozhydaiev V, Vayer M, Fave C, Moran J, Leboeuf D. Synthesis of Unprotected β‐Arylethylamines by Iron(II)‐Catalyzed 1,2‐Aminoarylation of Alkenes in Hexafluoroisopropanol. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202215257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
| | - Marie Vayer
- University of Strasbourg: Universite de Strasbourg ISIS FRANCE
| | | | - Joseph Moran
- University of Strasbourg: Universite de Strasbourg ISIS FRANCE
| | - David Leboeuf
- Universite de Strasbourg ISIS 8 Allée Gaspard Monge 67000 strasbourg FRANCE
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Abstract
For the first time, azaoxyallyl cations were used as cycloaddition partners with tropone derivatives to access nitrogen-containing [7,6]-fused bicycles in a metal-free process under mild reaction conditions. DFT computations have been used to shed light on the selectivities observed during the course of the reaction.
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Affiliation(s)
- Guillaume Force
- Institut de Chimie Moléculaire et des Matériaux d’Orsay (ICMMO), CNRS UMR 8182, Université Paris-Sud, Université Paris-Saclay
| | - Amélie Pérot
- Laboratoire de Chimie Moléculaire (LCM), CNRS UMR 9168, Ecole Polytechnique, Institut Polytechnique de Paris
| | - Régis Guillot
- Institut de Chimie Moléculaire et des Matériaux d’Orsay (ICMMO), CNRS UMR 8182, Université Paris-Sud, Université Paris-Saclay
| | - Vincent Gandon
- Institut de Chimie Moléculaire et des Matériaux d’Orsay (ICMMO), CNRS UMR 8182, Université Paris-Sud, Université Paris-Saclay
- Laboratoire de Chimie Moléculaire (LCM), CNRS UMR 9168, Ecole Polytechnique, Institut Polytechnique de Paris
| | - David Leboeuf
- Institut de Chimie Moléculaire et des Matériaux d’Orsay (ICMMO), CNRS UMR 8182, Université Paris-Sud, Université Paris-Saclay
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Ducret JE, Batani D, Boutoux G, Chancé A, Gastineau B, Guillard JC, Harrault F, Jakubowska K, Lantuejoul-Thfoin I, Leboeuf D, Loiseau D, Lotode A, Pès C, Rabhi N, Saïd A, Semsoum A, Serani L, Thomas B, Toussaint JC, Vauzour B. Calibration of the low-energy channel Thomson parabola of the LMJ-PETAL diagnostic SEPAGE with protons and carbon ions. Rev Sci Instrum 2018; 89:023304. [PMID: 29495838 DOI: 10.1063/1.5009737] [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] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The SEPAGE diagnostic will detect charged particles (electrons, protons, and ions) accelerated in the interaction of the PETAL (PETawatt Aquitaine Laser) laser with its targets on the LMJ (Laser MegaJoule)-PETAL laser facility. SEPAGE will be equipped with a proton-radiography front detector and two Thomson parabolas (TP), corresponding to different ranges of the particle energy spectra: Above 0.1 MeV for electrons and protons in the low-energy channel, with a separation capability between protons and 12C6+ up to 20 MeV proton energy and above 8 MeV for the high-energy channel, with a separation capability between protons and 12C6+ up to 200 MeV proton kinetic energy. This paper presents the calibration of the SEPAGE's low-energy channel TP at the Tandem facility of Orsay (France) with proton beams between 3 and 22 MeV and carbon-ion beams from 5.8 to 84 MeV. The magnetic and electric fields' integrals were determined with an accuracy of 10-3 by combining the deflections measured at different energies with different target thicknesses and materials, providing different in-target energy losses of the beam particles and hence different detected energies for given beam energies.
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Affiliation(s)
- J-E Ducret
- CELIA (Centre Lasers Intenses et Applications), Université Bordeaux, CNRS, CEA, UMR 5107, F-33405 Talence, France
| | - D Batani
- CELIA (Centre Lasers Intenses et Applications), Université Bordeaux, CNRS, CEA, UMR 5107, F-33405 Talence, France
| | - G Boutoux
- CELIA (Centre Lasers Intenses et Applications), Université Bordeaux, CNRS, CEA, UMR 5107, F-33405 Talence, France
| | - A Chancé
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - B Gastineau
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - J-C Guillard
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - F Harrault
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - K Jakubowska
- CELIA (Centre Lasers Intenses et Applications), Université Bordeaux, CNRS, CEA, UMR 5107, F-33405 Talence, France
| | | | - D Leboeuf
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - D Loiseau
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - A Lotode
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - C Pès
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - N Rabhi
- CELIA (Centre Lasers Intenses et Applications), Université Bordeaux, CNRS, CEA, UMR 5107, F-33405 Talence, France
| | - A Saïd
- Institut de Physique Nucléaire d'Orsay, 15 rue Georges Clémenceau, F-91405 Orsay cedex, France
| | - A Semsoum
- Institut de Physique Nucléaire d'Orsay, 15 rue Georges Clémenceau, F-91405 Orsay cedex, France
| | - L Serani
- Centre d'Etudes Nucléaires de Bordeaux Gradignan, Université de Bordeaux, UMR 5797 CNRS/IN2P3, Gradignan 33175, France
| | - B Thomas
- Centre d'Etudes Nucléaires de Bordeaux Gradignan, Université de Bordeaux, UMR 5797 CNRS/IN2P3, Gradignan 33175, France
| | - J-C Toussaint
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - B Vauzour
- CEA DAM DIF, F-91297 Arpajon, France
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Rodrigues R, Lazib Y, Maury J, Neuville L, Leboeuf D, Dauban P, Darses B. Approach to pactamycin analogues using rhodium(ii)-catalyzed alkene aziridination and C(sp3)–H amination reactions. Org Chem Front 2018. [DOI: 10.1039/c7qo00878c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Application of dirhodium(ii)-catalyzed nitrene transfers allows for the preparation of a platform bearing the triamino moiety present in pactamycin.
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Affiliation(s)
- Romain Rodrigues
- Institut de Chimie des Substances Naturelles
- CNRS UPR 2301
- Univ. Paris-Sud
- Université Paris-Saclay
- 91198 Gif-sur-Yvette
| | - Yanis Lazib
- Institut de Chimie des Substances Naturelles
- CNRS UPR 2301
- Univ. Paris-Sud
- Université Paris-Saclay
- 91198 Gif-sur-Yvette
| | - Julien Maury
- Institut de Chimie des Substances Naturelles
- CNRS UPR 2301
- Univ. Paris-Sud
- Université Paris-Saclay
- 91198 Gif-sur-Yvette
| | - Luc Neuville
- Institut de Chimie des Substances Naturelles
- CNRS UPR 2301
- Univ. Paris-Sud
- Université Paris-Saclay
- 91198 Gif-sur-Yvette
| | - David Leboeuf
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- CNRS UMR 8182
- Univ. Paris-Sud
- Université Paris-Saclay
- 91405 Orsay cedex
| | - Philippe Dauban
- Institut de Chimie des Substances Naturelles
- CNRS UPR 2301
- Univ. Paris-Sud
- Université Paris-Saclay
- 91198 Gif-sur-Yvette
| | - Benjamin Darses
- Institut de Chimie des Substances Naturelles
- CNRS UPR 2301
- Univ. Paris-Sud
- Université Paris-Saclay
- 91198 Gif-sur-Yvette
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Morcillo SP, Leboeuf D, Bour C, Gandon V. Calcium-Catalyzed Synthesis of Polysubstituted 2-Alkenylfurans from β-Keto Esters Tethered to Propargyl Alcohols. Chemistry 2016; 22:16974-16978. [DOI: 10.1002/chem.201603929] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Indexed: 12/22/2022]
Affiliation(s)
- Sara P. Morcillo
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS UMR 8182, Univ. Paris-Sud; Université Paris-Saclay; bâtiment 420 91405 Orsay cedex France
| | - David Leboeuf
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS UMR 8182, Univ. Paris-Sud; Université Paris-Saclay; bâtiment 420 91405 Orsay cedex France
| | - Christophe Bour
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS UMR 8182, Univ. Paris-Sud; Université Paris-Saclay; bâtiment 420 91405 Orsay cedex France
| | - Vincent Gandon
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS UMR 8182, Univ. Paris-Sud; Université Paris-Saclay; bâtiment 420 91405 Orsay cedex France
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Leboeuf D, Presset M, Michelet B, Bour C, Bezzenine-Lafollée S, Gandon V. Ca(II) -catalyzed alkenylation of alcohols with vinylboronic acids. Chemistry 2015; 21:11001-5. [PMID: 26133924 DOI: 10.1002/chem.201501677] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Indexed: 11/07/2022]
Abstract
Direct alkenylation of a variety of alcohols with vinylboronic acids has been accomplished using the air-stable calcium(II) complex Ca(NTf2 )2 under mild conditions with short reaction times. For reluctant transformations, an ammonium salt was used as an additive to circumvent the reactivity issue.
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Affiliation(s)
- David Leboeuf
- ICMMO (UMR CNRS 8182), Université Paris-Sud, Bâtiment 420, 91405 Orsay cedex (France)
| | - Marc Presset
- ICMMO (UMR CNRS 8182), Université Paris-Sud, Bâtiment 420, 91405 Orsay cedex (France)
| | - Bastien Michelet
- ICMMO (UMR CNRS 8182), Université Paris-Sud, Bâtiment 420, 91405 Orsay cedex (France)
| | - Christophe Bour
- ICMMO (UMR CNRS 8182), Université Paris-Sud, Bâtiment 420, 91405 Orsay cedex (France)
| | | | - Vincent Gandon
- ICMMO (UMR CNRS 8182), Université Paris-Sud, Bâtiment 420, 91405 Orsay cedex (France).
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Leboeuf D, Ciesielski J, Frontier A. Gold(I)-Catalyzed Iodination of Arenes. Synlett 2015. [DOI: 10.1055/s-0034-1380682] [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: 10/23/2022]
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Cosson E, Bihan H, Vittaz L, Khiter C, Carbillon L, Faghfouri F, Leboeuf D, Dauphin H, Lepagnol A, Reach G, Valensi P. Improving postpartum glucose screening after gestational diabetes mellitus: a cohort study to evaluate the multicentre IMPACT initiative. Diabet Med 2015; 32:189-97. [PMID: 25393823 DOI: 10.1111/dme.12631] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/07/2014] [Indexed: 02/05/2023]
Abstract
AIMS To evaluate a mobilization campaign, the IMPACT initiative, which included multidisciplinary meetings, provision of information and a systematic prescription of an oral glucose tolerance test to improve the rate of glucose screening in women with gestational diabetes mellitus in the four largest maternity units in our area, starting in March 2011. METHODS We retrospectively compared the level of self-reported screening during the first 6 months postpartum of women who gave birth after having been diagnosed with gestational diabetes before (January 2009 to December 2010) and after the IMPACT campaign (April 2011 to February 2012). RESULTS We included 961 women (589 in the period before and 372 in the period after the campaign was initiated) with a mean ± SD age of 33.2 ± 5.3 years and BMI of 27.8 ± 5.3 kg/m². Multivariate analysis, stratified using a propensity score in order to limit bias caused by imbalance between both periods, showed that the postpartum screening rate was higher after the campaign began (48.9 vs 33.3%, odds ratio 1.7, 95% CI 1.1-2.5; P = 0.019) and higher in women who received insulin treatment during pregnancy (odds ratio 2.3, 95% CI 1.5-3.6; P < 0.001), consumed fruit and vegetables daily (odds ratio 1.6, 95% CI 1.1-2.4; P = 0.035) and did not smoke (smoking vs non-smoking: odds ratio 0.3, 95% CI 0.1-0.7; P = 0.01). There was no interaction between the campaign effect and these particular conditions. The proportion of oral glucose tolerance tests performed in women who underwent screening increased from 6.3 to 33.0%. CONCLUSIONS The IMPACT campaign increased postpartum screening, and the use the oral glucose tolerance test in particular. The effect of this initiative might be reinforced in women who are non-daily consumers of fruit and vegetables, smokers and those who do not receive insulin treatment during pregnancy.
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Affiliation(s)
- E Cosson
- AP-HP, Jean Verdier Hospital, Department of Endocrinology, Diabetology and Nutrition, Université Paris 13, Sorbonne Paris Cité, Bondy; Sorbonne Paris Cité, UMR U1153 Inserm / U1125 Inra / Cnam / Université Paris 13, Bobigny, France
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Bihan H, Cosson E, Khiter C, Vittaz L, Faghfouri F, Leboeuf D, Carbillon L, Dauphin H, Reach G, Valensi P. Factors associated with screening for glucose abnormalities after gestational diabetes mellitus: baseline cohort of the interventional IMPACT study. Diabetes Metab 2014; 40:151-7. [PMID: 24503190 DOI: 10.1016/j.diabet.2013.12.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2013] [Revised: 11/29/2013] [Accepted: 12/02/2013] [Indexed: 11/17/2022]
Abstract
INTRODUCTION Although it is important to screen women who have had gestational diabetes mellitus (GDM) for abnormal post-partum glucose levels, such testing is rarely performed. The aim of this study was to use data from the first observational phase of the IMPACT study to determine rates of screening within 6 months of delivery in a multiethnic cohort, focusing in particular on the effects of social deprivation and the risk of future diabetes. PATIENTS AND METHODS To investigate the frequency of post-partum screening, charts were analyzed, and all women attending four centres located in a deprived area who had had GDM between January 2009 and December 2010 were contacted by phone. The Evaluation of Precarity and Inequalities in Health Examination Centres (EPICES) deprivation index and Finnish Diabetes Risk Score (FINDRISK) questionnaire were also evaluated. RESULTS Data were evaluable for 589 of the 719 women contacted (mean age: 33.4 ± 5.2 years; mean body mass index: 27.6 ± 5.4 kg/m(2)), and 196 (33.3%) reported having been screened. On multivariate analysis, factors associated with a lack of screening were smoking [odds ratio (OR): 0.42 (0.20-0.90), P<0.05], low consumption of fruit and vegetables [OR: 0.58 (0.39-0.82), P<0.01] and heavier offspring birth weight (P<0.05), although there were no differences in FINDRISK and EPICES scores between screened and unscreened women. CONCLUSION One-third of women who had had GDM reported having been screened for dysglycaemia at 6 months post-partum. However, it is expected that the interventional phase of the IMPACT study will increase screening rates, especially in women with the risk factors associated with lower screening rates during this observational phase.
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Affiliation(s)
- H Bihan
- AP-HP, Avicenne Hospital, Paris 13 University, Sorbonne Paris Cité, Department of Diabetology, Metabolic Diseases, CRNH-IdF, CINFO, Bobigny, France; Sorbonne Paris Cité, UMR U557 Inserm/U1125 Inra/Cnam/Université Paris 13, Bobigny, France.
| | - E Cosson
- Sorbonne Paris Cité, UMR U557 Inserm/U1125 Inra/Cnam/Université Paris 13, Bobigny, France; AP-HP, Jean-Verdier Hospital, Paris 13 University, Sorbonne Paris Cité, Department of Endocrinology-Diabetology-Nutrition, CRNH-IdF, CINFO, Bondy, France
| | - C Khiter
- De La Fontaine Hospital, Department of Obstetrics and Gynecology, Saint-Denis, France
| | - L Vittaz
- Ballanger Hospital, Department of Endocrinology-Diabetology, Aulnay-Sous-Bois, France
| | - F Faghfouri
- AP-HP, Jean-Verdier Hospital, Paris 13 University, Sorbonne Paris Cité, Department of Endocrinology-Diabetology-Nutrition, CRNH-IdF, CINFO, Bondy, France
| | - D Leboeuf
- Seine-Saint-Denis Private Hospital, Department of Obstetrics and Gynecology, Le Blanc Mesnil, France
| | - L Carbillon
- AP-HP, Jean-Verdier Hospital, Paris 13 University, Sorbonne Paris Cité, Department of Gynaecology-Obstetrics, Bondy, France
| | - H Dauphin
- Ballanger Hospital, Department of Gynecology, Aulnay-Sous-Bois, France
| | - G Reach
- AP-HP, Avicenne Hospital, Paris 13 University, Sorbonne Paris Cité, Department of Diabetology, Metabolic Diseases, CRNH-IdF, CINFO, Bobigny, France
| | - P Valensi
- AP-HP, Jean-Verdier Hospital, Paris 13 University, Sorbonne Paris Cité, Department of Endocrinology-Diabetology-Nutrition, CRNH-IdF, CINFO, Bondy, France
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Pitaval A, Leboeuf D, Ceccon J, Echavarren AM. Access to the Protoilludane Core by Gold-Catalyzed Allene-vinylcyclopropane Cycloisomerization. Org Lett 2013. [PMCID: PMC3793896 DOI: 10.1021/ol402688f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
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Gold(I)-catalyzed allene-vinylcyclopropane cycloisomerization leads to the tricyclic framework of the protoilludanes in a single step by a reaction that involves a cyclopropane ring expansion and a Prins cyclization.
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Affiliation(s)
- Anthony Pitaval
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona, Spain
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Affiliation(s)
- Carla Obradors
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona, Spain
| | - David Leboeuf
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Juhanes Aydin
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Antonio M. Echavarren
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona, Spain
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Putzke C, Coldea AI, Guillamón I, Vignolles D, McCollam A, Leboeuf D, Watson MD, Mazin II, Kasahara S, Terashima T, Shibauchi T, Matsuda Y, Carrington A. de Haas-van Alphen study of the Fermi surfaces of superconducting LiFeP and LiFeAs. Phys Rev Lett 2012; 108:047002. [PMID: 22400881 DOI: 10.1103/physrevlett.108.047002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2011] [Indexed: 05/31/2023]
Abstract
We report a de Haas-van Alphen oscillation study of the 111 iron pnictide superconductors LiFeAs with T(c) ≈ 18 K and LiFeP with T(c) ≈ 5 K. We find that for both compounds the Fermi surface topology is in good agreement with density functional band-structure calculations and has almost nested electron and hole bands. The effective masses generally show significant enhancement, up to ~3 for LiFeP and ~5 for LiFeAs. However, one hole Fermi surface in LiFeP shows a very small enhancement, as compared with its other sheets. This difference probably results from k-dependent coupling to spin fluctuations and may be the origin of the different nodal and nodeless superconducting gap structures in LiFeP and LiFeAs, respectively.
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Affiliation(s)
- C Putzke
- HH Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, United Kingdom
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Chang J, Daou R, Proust C, Leboeuf D, Doiron-Leyraud N, Laliberté F, Pingault B, Ramshaw BJ, Liang R, Bonn DA, Hardy WN, Takagi H, Antunes AB, Sheikin I, Behnia K, Taillefer L. Nernst and Seebeck coefficients of the cuprate superconductor YBa2Cu3O6.67: a study of Fermi surface reconstruction. Phys Rev Lett 2010; 104:057005. [PMID: 20366789 DOI: 10.1103/physrevlett.104.057005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2009] [Indexed: 05/29/2023]
Abstract
The Seebeck and Nernst coefficients S and nu of the cuprate superconductor YBa{2}Cu{3}O{y} (YBCO) were measured in a single crystal with doping p=0.12 in magnetic fields up to H=28 T. Down to T=9 K, nu becomes independent of field by H approximately 30 T, showing that superconducting fluctuations have become negligible. In this field-induced normal state, S/T and nu/T are both large and negative in the T-->0 limit, with the magnitude and sign of S/T consistent with the small electronlike Fermi surface pocket detected previously by quantum oscillations and the Hall effect. The change of sign in S(T) at T approximately 50 K is remarkably similar to that observed in La2-xBaxCuO4, La{2-x-y}Nd{y}Sr_{x}CuO{4}, and La{2-x-y}Eu{y}Sr{x}CuO{4}, where it is clearly associated with the onset of stripe order. We propose that a similar density-wave mechanism causes the Fermi surface reconstruction in YBCO.
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Affiliation(s)
- J Chang
- Département de physique & RQMP, Université de Sherbrooke, Sherbrooke, Canada
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Lejus C, Pichenot V, Péan D, Leboeuf D, Le Roux C, Asehnoune K. Intubation avec l’Airtraq™ chez un enfant porteur de séquelles graves de brûlure. ACTA ACUST UNITED AC 2009; 28:399-400. [DOI: 10.1016/j.annfar.2009.02.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Garcia P, Moulin S, Miclo Y, Leboeuf D, Gandon V, Aubert C, Malacria M. Synthesis of Tricyclic Fused 3-Aminopyridines through Intramolecular CoI-Catalyzed [2+2+2] Cycloaddition between Ynamides, Nitriles, and Alkynes. Chemistry 2009; 15:2129-39. [DOI: 10.1002/chem.200802301] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Bangura AF, Fletcher JD, Carrington A, Levallois J, Nardone M, Vignolle B, Heard PJ, Doiron-Leyraud N, Leboeuf D, Taillefer L, Adachi S, Proust C, Hussey NE. Small Fermi surface pockets in underdoped high temperature superconductors: observation of Shubnikov-de Haas oscillations in YBa2Cu4O8. Phys Rev Lett 2008; 100:047004. [PMID: 18352322 DOI: 10.1103/physrevlett.100.047004] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2007] [Indexed: 05/26/2023]
Abstract
We report the observation of Shubnikov-de Haas oscillations in the underdoped cuprate superconductor YBa2Cu4O8 (Y124). For fields aligned along the c axis, the frequency of the oscillations is 660+/-30 T, which corresponds to approximately 2.4% of the total area of the first Brillouin zone. The effective mass of the quasiparticles on this orbit is measured to be 2.7+/-0.3 times the free electron mass. Both the frequency and mass are comparable to those recently observed for ortho-II YBa2Cu3O6.5 (Y123-II). We show that although small Fermi surface pockets may be expected from band-structure calculations in Y123-II, no such pockets are predicted for Y124. Our results therefore imply that these small pockets are a generic feature of the copper oxide plane in underdoped cuprates.
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Affiliation(s)
- A F Bangura
- H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, BS8 1TL, United Kingdom
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Geny A, Leboeuf D, Rouquié G, Vollhardt KPC, Malacria M, Gandon V, Aubert C. Cobalt(I)-Mediated Preparation of Polyborylated Cyclohexadienes: Scope, Limitations, and Mechanistic Insight. Chemistry 2007; 13:5408-25. [PMID: 17492821 DOI: 10.1002/chem.200700337] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
A series of 1,3- and 1,4-diboryl-1,3-cyclohexadienes have been prepared by intermolecular CoCp-mediated [2+2+2] cocyclizations of alkynylboronic pinacolate esters with alkenes, followed by oxidative demetallation with iron(III) chloride. The effect of substitution at the borylated alkyne on chemo- and regioselectivities has been studied, suggesting steric control. The proper choice of substituents allowed the preparation of 1,3-diborylated cyclohexadienes in a highly selective manner. Alternatively, 1,4-diborylated cyclohexadienes could be prepared from diborylated diynes. The scope of this reaction has been examined and found to include electron-poor, electron-rich, linear, and cyclic alkenes. The diborylated cyclohexadienes were submitted to single or double Suzuki-Miyaura cross-coupling reactions with haloarenes to afford polyarylated systems. The mechanism of the title reaction, including the regioselectivity of the cycloaddition steps, has been analyzed by means of DFT computations.
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Affiliation(s)
- Anaïs Geny
- Laboratoire de Chimie Organique, Université Pierre et Marie Curie, Tour 44-54, 4 place Jussieu 75252 Paris, France
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20
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Abstract
Specific molecular bonds between apposing surfaces play a central role in many biological structures and functions. They display a widely varying anchoring to the cell surface, and they are subject to forces that affect their binding characteristics due to their hydrodynamic environments. Here, we examine both anchoring and shearing aspects using simplified model systems aimed at gaining insight into the formation of a 2D bond collection under stress using two different surface anchors. The highly specific streptavidin-biotin molecular bond was chosen as the model receptor-ligand pair, and grafted colloids were used as model surfaces. To explore the role of the surface anchor, we grafted biotin onto the particle surface following two different approaches: first, the grafting was performed directly on the particle amine functions; second, a 35-nm-long PEG spacer was used. Hybrid particle classes were brought into contact in a homogeneous shear (between 200 s(-)(1) and 1200 s(-)(1)) using a cone plate geometry. The bond association and dissociation kinetics were given by the time course assemblage of hybrid particles into doublets. We observed saturating kinetics profiles that we interpreted as a linkage-breakage equilibrium, which yielded the on and off rates. We found that the biotin-PEG spacer was needed in order to observe significant binding at any shear rate. We also showed that only the number of collisions per unit time, generated by the shear, affected the on rate of the binding. Neither the exerted forces nor the collision lifetime had any effect. The off rate decreased with shear, possibly because of the shortening of the force duration, which results from the increasing shear rate.
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Affiliation(s)
- David Leboeuf
- CNRS UMR 168/Institut Curie-11, 75 248 Paris Cedex 05, France
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21
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Dupret C, Asnafi V, Leboeuf D, Millien C, Ben Abdelali R, Preudhomme C, Beldjord K, Delabesse E, Macintyre E. IgH/TCR rearrangements are common in MLL translocated adult AML and suggest an early T/myeloid or B/myeloid maturation arrest, which correlates with the MLL partner. Leukemia 2005; 19:2337-8. [PMID: 16304577 DOI: 10.1038/sj.leu.2403981] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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22
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Gandon V, Leboeuf D, Amslinger S, Vollhardt KPC, Malacria M, Aubert C. Chemo-, Regio-, and Stereoselective Cobalt-Mediated [2+2+2] Cycloaddition of Alkynyl Boronates to Alkenes: 1,3- and 1,4-Diboryl-1,3-cyclohexadienes. Angew Chem Int Ed Engl 2005. [DOI: 10.1002/ange.200502038] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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23
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Gandon V, Leboeuf D, Amslinger S, Vollhardt KPC, Malacria M, Aubert C. Chemo-, Regio-, and Stereoselective Cobalt-Mediated [2+2+2] Cycloaddition of Alkynyl Boronates to Alkenes: 1,3- and 1,4-Diboryl-1,3-cyclohexadienes. Angew Chem Int Ed Engl 2005; 44:7114-8. [PMID: 16217821 DOI: 10.1002/anie.200502038] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Vincent Gandon
- Université Pierre et Marie Curie, Institut de Chimie Moléculaire-FR2769, Laboratoire de Chimie Organique -UMR 7611, Paris, France
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24
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Delabesse E, Bernard M, Landman-Parker J, Davi F, Leboeuf D, Varet B, Valensi F, Macintyre EA. Simultaneous SIL-TAL1 RT-PCR detection of all tal(d) deletions and identification of novel tal(d) variants. Br J Haematol 1997; 99:901-7. [PMID: 9432040 DOI: 10.1046/j.1365-2141.1997.4833286.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Site-specific deletions of the 5' part of the TAL1 gene (tal(d)) are among the most frequent non-random genetic abnormalities in T-cell acute lymphoblastic leukaemia (T-ALL). They are usually detected by PCR from DNA with several primer pairs or by Southern blot analysis. Since tal(d) lead to expression of a SIL-TAL1 fusion transcript, irrespective of the genomic breakpoint, we have used a single monoplex RT-PCR reaction to screen 55 T-ALL patients at diagnosis. SIL-TAL1 transcripts were demonstrated in 12 (22%) cases, including 7/27 (26%) children <15 years of age, 2/8 (25%) adolescents and 2/17 (12%) adults aged >20 years. SIL-TAL1 RT-PCR was preferrable to tal(d) DNA PCR since it allowed the simultaneous detection of tal(d), tal(d2) and two previously undescribed tal(d) variants. SIL-TAL1 RT-PCR screening should therefore increase the detection rate of tal(d) by approximately 15-20%, with an at least comparable sensitivity to tal(d) genomic PCR, and represents a more practical and economic alternative to multiple DNA PCRs or Southern blotting when incorporated into molecular screening for multiple transcripts at diagnosis.
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Affiliation(s)
- E Delabesse
- CNRS URA 1461, Université Paris V, CHU Necker-Enfants Malades, France
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25
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Macintyre E, Bourquelot P, Leboeuf D, Rimokh R, Archimbaud E, Smetsers T, Zittoun R. MLL cleavage occurs in approximately 5% of de novo acute myeloid leukemia, including in patients analyzed before treatment induction. Blood 1997; 89:2224-6. [PMID: 9058751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
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26
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Landman-Parker J, Aubin J, Delabesse E, Tabone MD, Adam M, Millien C, Leboeuf D, Buzyn-Veil A, Dollfus C, Leverger G, Macintyre EA. Simplified strategies for minimal residual disease detection in B-cell precursor acute lymphoblastic leukaemia. Br J Haematol 1996; 95:281-90. [PMID: 8904883 DOI: 10.1046/j.1365-2141.1996.d01-1917.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
We have developed a simplified fluorescent run-off (FluRO) based IgH PCR strategy in order to facilitate follow-up of large numbers of B-cell precursor (BCP) acute lymphoblastic leukaemias (ALL) in a routine molecular diagnostic laboratory. DNA samples from 26 BCP-ALL and one B-cell line were amplified using IgH FR1 and FR2 consensus primers and analysed in parallel either by ethidium bromide non-denaturing PAGE or, after rendering the PCR products fluorescent with an internal JH consensus primer, by high-resolution analysis on an automated fragment analyser. The latter led to a minimum of one log increase in sensitivity of detection in 62% of alleles from 19 samples (16/28 in FR1; 11/15 in FR2) tested in parallel on log DNA dilutions, and to at least a 10(-2) level of sensitivity of detection in 15/19. The improved resolution allowed an approximate 20% increase in the number of clonal alleles detected, and consequently doubled the incidence of oligoclonality (6/26; 23%). Using these strategies, 6/17 (35%) of children analysed prospectively showed residual IgH positivity in the post induction complete remission bone marrow sample. Both early deaths occurred within this subgroup of patients and of the three of four surviving patients tested, two remained positive 2-3 months later. Although this simplified strategy is, as expected, less sensitive than anti-V-D-J junction specific strategies, it enables detection of a category of 'slow-remitters' which may have prognostic significance at a stage where therapeutic decisions are taken.
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27
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Poirel H, Rack K, Delabesse E, Radford-Weiss I, Troussard X, Debert C, Leboeuf D, Bastard C, Picard F, Veil-Buzyn A, Flandrin G, Bernard O, Macintyre E. Incidence and characterization of MLL gene (11q23) rearrangements in acute myeloid leukemia M1 and M5. Blood 1996; 87:2496-505. [PMID: 8630416] [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: 02/01/2023] Open
Abstract
To determine the incidence of MLL rearrangement in acute myeloid leukemia (AML) French-American-British (FAB) type M1 and to evaluate optimal screening strategies for the characterization of such abnormalities, we analyzed specimens from 41 patients with AML by Southern blotting with two MLL genomic probes and compared the capacities of reverse transcription-polymerase chain reaction (RT-PCR) and fluorescent in situ hybridization (FISH) to identify the types of rearrangement found in AML M1 with those observed in AML M5. MLL rearrangement was found in 6 of 29 (20%) AML M1 and 6 of 10 AML M5 cases. RT-PCR characterization of 11 cases showed four MLL self-fusions, four MLL-AF6, two MLL-AF9, including a novel AF9 breakpoint, and one uncharacterized t(11:19). Only 5 of 10 MLL-rearranged cases tested demonstrated karyotypic 11q23 abnormalities. FISH analysis of nine cases with an MLL-specific yeast artificial chromosome (YAC) confirmed the cytogenetic abnormalities in two cases, clarified them in one, and did not detect six cases, including three MLL self-fusions, one case with a probable MLL-rearranged subclone not represented karyotypically, and twoMLL-AF6. A whole chromosome 11 paint detected one of these MLL-AF6, and an AF6 cosmid demonstrated that the other was probably due to insertion of a submicroscopic portion of chromosome 6, including part of AF6, into an apparently normal chromosome 11. We conclude that MLL rearrangements are common in adult AML M1, that MLL self-fusion and MLL-AF6 are the most frequent types of abnormalities, and that RT-PCR is preferable to 11q23 FISH analysis for their characterization.
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MESH Headings
- Adult
- Aged
- Aged, 80 and over
- Base Sequence
- Child
- Child, Preschool
- Chromosomes, Artificial, Yeast
- Chromosomes, Human, Pair 11/genetics
- Chromosomes, Human, Pair 11/ultrastructure
- Chromosomes, Human, Pair 6/genetics
- Chromosomes, Human, Pair 6/ultrastructure
- DNA-Binding Proteins/genetics
- Down Syndrome/complications
- Female
- Histone-Lysine N-Methyltransferase
- Humans
- Immunophenotyping
- In Situ Hybridization, Fluorescence
- Infant
- Leukemia, Monocytic, Acute/genetics
- Leukemia, Myeloid, Acute/genetics
- Male
- Middle Aged
- Molecular Sequence Data
- Myeloid-Lymphoid Leukemia Protein
- Neoplasm Proteins/genetics
- Oncogene Proteins, Fusion/genetics
- Oncogenes
- Polymerase Chain Reaction
- Proto-Oncogenes
- Retrospective Studies
- Transcription Factors
- Translocation, Genetic
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Affiliation(s)
- H Poirel
- Department of Haematology, University Paris V, France
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28
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Poirel H, Radford-Weiss I, Rack K, Troussard X, Veil A, Valensi F, Picard F, Guesnu M, Leboeuf D, Melle J. Detection of the chromosome 16 CBF beta-MYH11 fusion transcript in myelomonocytic leukemias. Blood 1995; 85:1313-22. [PMID: 7858261] [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: 01/27/2023] Open
Abstract
Karyotypic detection of chromosomal 16 abnormalities classically associated with AML M4Eo can be difficult. Characterization of the two genes involved in the inv(16)(p13q22), CBF beta and MYH11, has allowed the detection of fusion transcripts by reverse-transcriptase polymerase chain reaction (RT-PCR). We have analyzed CBF beta-MYH11 fusion transcripts by RT-PCR in myelomonocytic leukemias, with or without eosinophilia, to determine whether their presence correlates with morphology. Fifty-three cases (11 AML M4Eo; 1 AML M4 with atypical abnormal eosinophils (AML M4 "Eo"); 29 AML M4; 8 AML M5; 3 CMML; and 1 AML M2 with eosinophilia) were analyzed. All 11 typical AML M4Eo were CBF beta-MYH11 positive. The single case of AML M4 with distinctive eosinophil abnormalities was negative by karyotype, RT-PCR and fluorescent in situ hybridization (FISH). Three of 29 (10%) AML M4 without abnormal eosinophils were CBF beta-MYH11 positive, 1 of which did not show any apparent chromosome 16 abnormalities by classical metaphase analysis (2 not tested). Both cases tested also showed MYH11 genomic rearrangement. None of the other leukemias were RT-PCR positive. Follow-up of three patient showed residual positivity in apparent complete remission. These data show that CBF beta-MYH11 fusion transcripts occur not only in the vast majority of typical AML M4Eo, but also in approximately 10% of AML M4 without eosinophilic abnormalities, a much higher incidence than the sporadic reports of chromosome 16 abnormalities in AML M4 would suggest. Taken together with the detection of CBF beta-MYH11 transcripts in the absence of apparent chromosome 16 abnormalities by classical banding techniques, these data show that additional screening by either RT-PCR or FISH should be performed in all AML M4, regardless of morphologic features, to allow accurate evaluation of the prognostic importance of this fusion transcript.
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MESH Headings
- Adolescent
- Adult
- Aged
- Base Sequence
- Child
- Child, Preschool
- Chromosome Aberrations
- Chromosome Inversion
- Chromosomes, Human, Pair 16/ultrastructure
- Core Binding Factor Alpha 1 Subunit
- Core Binding Factors
- DNA-Binding Proteins/genetics
- Eosinophils/pathology
- Female
- Humans
- Infant
- Leukemia, Myelomonocytic, Acute/classification
- Leukemia, Myelomonocytic, Acute/genetics
- Leukemia, Myelomonocytic, Acute/metabolism
- Male
- Middle Aged
- Molecular Sequence Data
- Myosins/genetics
- Neoplasm Proteins/genetics
- Oncogene Proteins, Fusion/genetics
- Polymerase Chain Reaction
- RNA, Messenger/analysis
- RNA, Neoplasm/analysis
- Transcription Factor AP-2
- Transcription Factors/genetics
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Affiliation(s)
- H Poirel
- Department of Hematology, CHU Necker-Enfants Malades, Paris, France
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29
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Aubin J, Davi F, Nguyen-Salomon F, Leboeuf D, Debert C, Taher M, Valensi F, Canioni D, Brousse N, Varet B. Description of a novel FR1 IgH PCR strategy and its comparison with three other strategies for the detection of clonality in B cell malignancies. Leukemia 1995; 9:471-9. [PMID: 7533868] [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: 01/25/2023]
Abstract
PCR amplification of IgH gene V-D-J junctional variability (IgH PCR) is increasingly replacing Southern analysis for the detection of clonal lymphoid populations in cases presenting diagnostic difficulties. In order to determine the most efficient strategy, we have compared three known methods, using consensus primers against the VH FR3 or FR2 (FR256) regions, or a mix of six primers against the FR1 region (FR1f), with a new approach using a consensus primer against FR1 (FR1c), never previously described for diagnostic purposes, on DNA from 89 monoclonal B-cell proliferations (16 ALL, 28 CLL/PLL, 15 myelomas, 30 NHL). We obtained a detection rate of 70% for FR3, 64% for FR1f and 77% and 78% for FR256 and FR1c, respectively. Polyclonal lymphocytes and mature T cell malignancies tested negative for all systems. Differences in the detection rate were related not only to the choice of VH primer but also the JH primer(s) used and the pathological subtype. All strategies led to adequate detection of leukaemic DNA, whereas the detection rate in myeloma varied between strategies from 47 to 80% and that of follicular lymphoma from 13 to 63%. The lowest detection rates were observed in follicular lymphoma and in mature CD5 negative proliferations, reflecting the probable correlation between somatic mutation and PCR false-negativity. The combined use of FR1c and FR256 allowed detection in at least one system of 92% of cases overall and at least 75% in all pathological subtypes, thus providing a simple, reliable and rapid non-radioactive system for the detection of B cell clonality.
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MESH Headings
- Alleles
- Antigens, CD/analysis
- Antigens, Neoplasm/analysis
- Base Sequence
- Blotting, Southern
- CD5 Antigens
- Clone Cells
- Consensus Sequence
- DNA Primers
- DNA, Neoplasm/genetics
- Evaluation Studies as Topic
- False Negative Reactions
- False Positive Reactions
- Gene Rearrangement, B-Lymphocyte, Heavy Chain
- Genes, Immunoglobulin
- Humans
- Immunoglobulin Heavy Chains/genetics
- Immunoglobulin J-Chains/genetics
- Immunoglobulin Variable Region/genetics
- Leukemia, B-Cell/genetics
- Leukemia, B-Cell/pathology
- Lymphoma, B-Cell/genetics
- Lymphoma, B-Cell/pathology
- Molecular Sequence Data
- Multiple Myeloma/genetics
- Multiple Myeloma/pathology
- Polymerase Chain Reaction/methods
- Risk
- Sensitivity and Specificity
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Affiliation(s)
- J Aubin
- Department of Hematology, CHU Necker Enfants-Malades, Paris, France
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30
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Troussard X, Rimokh R, Valensi F, Leboeuf D, Fenneteau O, Guitard AM, Manel AM, Schillinger F, Leglise C, Brizard A. Heterogeneity of t(1;19)(q23;p13) acute leukaemias. French Haematological Cytology Group. Br J Haematol 1995; 89:516-26. [PMID: 7734349 DOI: 10.1111/j.1365-2141.1995.tb08357.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The t(1;19)(q23;p13) translocation occurs commonly in B-lineage ALL. Previous reports have demonstrated a predominance of cases with expression of cytoplasmic Ig mu (C mu+), and FAB L1/L2 phenotype, a poor prognosis and expression of a fusion transcript involving the E2A and PBX1 genes in C mu+ but not in C mu- cases. Of 38 patients with karyotypically proven t(1;19) (q23;p13) leukaemias, we extensively analysed 18 patients with acute leukaemia including 16 B-lineage ALLs, one T-ALL and one AML M4. The AML was associated with a classic E2A-PBX1 fusion transcript and may represent the human counterpart of the AMLs induced by E2A-PBX1 retroviral infection of murine marrow progenitors. The T-ALL was E2A-PBX1 negative and neither the E2A nor the LYL-1 genes, both situated at chromosome 19 p13, were rearranged. Of the 16 B-lineage ALLs, four had cytological features resembling an 'L3-like' phenotype classically associated with Burkitt's lymphoma, two at diagnosis and relapse and two exclusively at relapse. E2A-PBX1 fusion transcripts were detected by RT-PCR in all 13 C mu+ patients and in 2/3 C mu- cases. The 'L3-like' phenotype did not correlate with a particular stage of maturation arrest (one sIg+, one C mu+, one C mu-) or type of E2A-PBX1 transcript, but was associated in all cases with a trisomy 8. Translocation, rearrangement, amplification or over-expression of the c-myc gene was not observed in these cases, demonstrating that the apparent association with trisomy 8 is not due to deregulation of this gene. We therefore show that the E2A-PBX1 transcript, although occurring predominantly in C mu+ pre-B ALL, also occurs in C mu- early pre-B ALL, sIg+ B-ALL and even in AML. These results suggest that the stage of maturation arrest, and indirectly the prognosis, are not solely due to the type of fusion transcript associated with the t(1;19).
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Affiliation(s)
- X Troussard
- Laboratoire d'Hématologie, Hôpital Necker-Enfants Malades, Paris, France
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31
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Leboeuf D. [Medical treatment of prolapse and of urinary incontinence]. Soins Gynecol Obstet Pueric Pediatr 1984:19-22. [PMID: 6334900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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