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Goetz MP, Toi M, Huober J, Sohn J, Trédan O, Park IH, Campone M, Chen SC, Manso LM, Paluch-Shimon S, Freedman OC, O'Shaughnessy J, Pivot X, Tolaney SM, Hurvitz S, Llombart-Cussac A, André V, Saha A, van Hal G, Shahir A, Iwata H, Johnston SRD. Abemaciclib plus a nonsteroidal aromatase inhibitor as initial therapy for HR+, HER2- advanced breast cancer: Final overall survival results of MONARCH 3. Ann Oncol 2024:S0923-7534(24)00139-X. [PMID: 38729566 DOI: 10.1016/j.annonc.2024.04.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 04/29/2024] [Accepted: 04/30/2024] [Indexed: 05/12/2024] Open
Abstract
BACKGROUND In MONARCH 2, the addition of abemaciclib to fulvestrant significantly improved both progression-free survival (PFS) and overall survival (OS) in patients with HR+, HER2- advanced breast cancer (ABC) with disease progression on prior endocrine therapy (ET). In MONARCH 3, the addition of abemaciclib to a nonsteroidal aromatase inhibitor (NSAI) as initial therapy for HR+, HER2- ABC significantly improved PFS. Here, we present the prespecified final OS results for MONARCH 3. PATIENTS AND METHODS MONARCH 3 is a randomized, double-blind, phase 3 study of abemaciclib plus NSAI (anastrozole or letrozole) versus placebo plus NSAI in postmenopausal women with HR+, HER2- ABC without prior systemic therapy in the advanced setting. The primary objective was investigator-assessed PFS; OS was a gated secondary endpoint, and chemotherapy-free survival (CFS) was an exploratory endpoint. RESULTS A total of 493 women were randomized 2:1 to receive abemaciclib plus NSAI (n = 328) or placebo plus NSAI (n = 165). After a median follow-up of 8.1 years, there were 198 OS events (60.4%) in the abemaciclib arm and 116 (70.3%) in the placebo arm (hazard ratio, 0.804; 95% confidence interval [CI], 0.637-1.015; P = 0.0664, non-significant). Median OS was 66.8 versus 53.7 months for abemaciclib versus placebo. In the subgroup with visceral disease (sVD), there were 113 OS events (65.3%) in the abemaciclib arm and 65 (72.2%) in the placebo arm (hazard ratio, 0.758; 95% CI, 0.558-1.030; P = 0.0757, non-significant). Median OS was 63.7 months versus 48.8 months for abemaciclib versus placebo. The previously demonstrated PFS benefit was sustained, and CFS numerically improved with the addition of abemaciclib. No new safety signals were observed. CONCLUSION Abemaciclib combined with an NSAI resulted in clinically meaningful improvement in median OS (ITT: 13.1 months; sVD: 14.9 months) in patients with HR+ HER2- ABC; however, statistical significance was not reached.
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Affiliation(s)
- M P Goetz
- Department of Oncology, Mayo Clinic, Rochester, MN, USA.
| | - M Toi
- Kyoto University, Kyoto, Japan
| | - J Huober
- Breast Center Cantonal Hospital St. Gallen, Switzerland and University of Ulm, Ulm, Germany
| | - J Sohn
- Yonsei Cancer Center, Seoul, Korea
| | - O Trédan
- Centre Léon Bérard, Lyon, France
| | - I H Park
- National Cancer Center, Goyang-si, Korea
| | - M Campone
- Institut de Cancérologie de l'Ouest, Angers, France
| | - S-C Chen
- Chang Gung University Medical College, Taipei, Taiwan
| | - L M Manso
- Hospital Universitario 12 de Octubre, Madrid, Spain
| | - S Paluch-Shimon
- Hadassah University Hospital & Faculty of Medicine Hebrew University, Jerusalem, Israel
| | | | - J O'Shaughnessy
- Baylor University Medical Center, Texas Oncology, US Oncology, Dallas, TX, USA
| | - X Pivot
- Centre Paul Strauss, INSERM 110, Strasbourg, France
| | - S M Tolaney
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - S Hurvitz
- Department of Medicine, UW Medicine, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | | | - V André
- Eli Lilly, Indianapolis, IN, USA
| | - A Saha
- Eli Lilly, Indianapolis, IN, USA
| | | | - A Shahir
- Eli Lilly, Indianapolis, IN, USA
| | - H Iwata
- Department of Breast Oncology, Aichi Cancer Center Hospital, Nagoya, Japan
| | - S R D Johnston
- Breast Unit, The Royal Marsden NHS Foundation Trust, London, UK
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Dalmas P, Arcani R, Nivaggioni V, André V, Gayet S, Chabbert V, Garrido V, Camillieri S, Lavrard P, Villani P, Daumas A. [Febrile splenomegaly]. Rev Med Interne 2023; 44:673-675. [PMID: 37550135 DOI: 10.1016/j.revmed.2023.07.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 07/24/2023] [Indexed: 08/09/2023]
Affiliation(s)
- P Dalmas
- Service de médecine interne, gériatrie et thérapeutique, CHU la Timone, Assistance publique-Hôpitaux de Marseille (AP-HM), 264, rue Saint-Pierre, 13385 Marseille cedex 05, France
| | - R Arcani
- Service de médecine interne, gériatrie et thérapeutique, CHU la Timone, Assistance publique-Hôpitaux de Marseille (AP-HM), 264, rue Saint-Pierre, 13385 Marseille cedex 05, France; Inra 1260, Inserm UMR_S 1263, centre de recherche en cardiovasculaire et nutrition (C2VN), Aix-Marseille University, Marseille, France.
| | - V Nivaggioni
- Laboratoire d'hématologie, hôpital de la Timone, Assistance publique-Hôpitaux de Marseille, Marseille, France
| | - V André
- Service de médecine interne, gériatrie et thérapeutique, CHU la Timone, Assistance publique-Hôpitaux de Marseille (AP-HM), 264, rue Saint-Pierre, 13385 Marseille cedex 05, France
| | - S Gayet
- Service de médecine interne, gériatrie et thérapeutique, CHU la Timone, Assistance publique-Hôpitaux de Marseille (AP-HM), 264, rue Saint-Pierre, 13385 Marseille cedex 05, France
| | - V Chabbert
- Service de médecine interne, gériatrie et thérapeutique, CHU la Timone, Assistance publique-Hôpitaux de Marseille (AP-HM), 264, rue Saint-Pierre, 13385 Marseille cedex 05, France
| | - V Garrido
- Service de médecine interne, gériatrie et thérapeutique, CHU la Timone, Assistance publique-Hôpitaux de Marseille (AP-HM), 264, rue Saint-Pierre, 13385 Marseille cedex 05, France
| | - S Camillieri
- UMR7249, CNRS, Centrale Marseille, institut Fresnel, Aix-Marseille université, AP-HM, Marseille, France
| | - P Lavrard
- Institut hospitalo-universitaire méditerranée infection, Marseille, France
| | - P Villani
- Service de médecine interne, gériatrie et thérapeutique, CHU la Timone, Assistance publique-Hôpitaux de Marseille (AP-HM), 264, rue Saint-Pierre, 13385 Marseille cedex 05, France
| | - A Daumas
- Service de médecine interne, gériatrie et thérapeutique, CHU la Timone, Assistance publique-Hôpitaux de Marseille (AP-HM), 264, rue Saint-Pierre, 13385 Marseille cedex 05, France; Inra 1260, Inserm UMR_S 1263, centre de recherche en cardiovasculaire et nutrition (C2VN), Aix-Marseille University, Marseille, France
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Desprez C, Kouatchet A, Marchand T, Mear JB, Tadié JM, Peterlin P, Chevalier P, Canet E, Couturier MA, Guillerm G, Bodenes L, Gyan E, Villate A, Ehrmann S, Lebreton A, Lester MA, Fronteau C, Larhantec G, André V, Riou J, Hunault-Berger M, Schmidt-Tanguy A, Orvain C. Outcome of patients with newly diagnosed AML admitted to the ICU, including preemptive admission - a multi-center study. Ann Hematol 2023; 102:1383-1393. [PMID: 37039874 DOI: 10.1007/s00277-023-05205-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 03/29/2023] [Indexed: 04/12/2023]
Abstract
Acute myeloid leukemia (AML) can lead to life-threatening complications that may require intensive care unit (ICU) management. It has been advocated that early preemptive (ePE) ICU admission, before the onset of organ failure, could benefit some high-risk patients such as those with hyperleukocytosis. The aim of this study was to retrospectively analyze the outcome of newly diagnosed AML patients who required ICU admission in five academic centers with a special focus on patients with an ePE admission strategy, i.e., those transferred to the ICU without any organ failure (modified SOFA score ≤ 2 [omitting thrombocytopenia] and no life-sustaining intervention in the first 24 h following ICU admission) before the start of induction therapy. Between January 2017 and December 2019, 428 patients were included among which 101 were admitted to the ICU. Among patients requiring life-sustaining interventions (n = 83), 18 (22%) died while in the ICU but ICU survivors had the same survival as those not admitted to the ICU. Patients with an ePE admission (n = 18) had more comorbidities and high-risk disease features such as hyperleukocytosis but required no life-sustaining interventions while in the ICU. In a subgroup analysis of patients with hyperleukocytosis ≥ 50 G/l at diagnosis (n = 85), patients not admitted to the ICU and those admitted with an ePE strategy had similar outcomes. This study provides encouraging results about ICU outcome in AML patients during induction therapy but the potential benefit of an ePE strategy must be confirmed prospectively.
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Affiliation(s)
- Christophe Desprez
- Service des maladies du sang, CHU d'Angers, 4 rue LarreyAngers Cedex 9, F-49933, Angers, France
- Service de médecine intensive et réanimation et de médecine hyperbare, CHU d'Angers, Angers, France
| | - Achille Kouatchet
- Service de médecine intensive et réanimation et de médecine hyperbare, CHU d'Angers, Angers, France
| | - Tony Marchand
- Service d'hématologie clinique, CHU de Rennes, Rennes, France
- INSERM U1236, Université Rennes 1, Rennes, France
- Federation hospitalo-universitaire « Grand Ouest against Leukemia », Nantes, France
| | | | - Jean Marc Tadié
- Maladies Infectieuses et Réanimation Médicale, CHU Rennes, Rennes, France
| | - Pierre Peterlin
- Federation hospitalo-universitaire « Grand Ouest against Leukemia », Nantes, France
- Service d'hématologie clinique, CHU de Nantes, Nantes, France
| | - Patrice Chevalier
- Federation hospitalo-universitaire « Grand Ouest against Leukemia », Nantes, France
- Service d'hématologie clinique, CHU de Nantes, Nantes, France
| | | | - Marie-Anne Couturier
- Federation hospitalo-universitaire « Grand Ouest against Leukemia », Nantes, France
- Service d'Hématologie Clinique, Hôpital Morvan, CHU de Brest, Brest, France
| | - Gaelle Guillerm
- Federation hospitalo-universitaire « Grand Ouest against Leukemia », Nantes, France
- Service d'Hématologie Clinique, Hôpital Morvan, CHU de Brest, Brest, France
| | - Laetitia Bodenes
- Médecine Intensive et Réanimation, CHU de Brest, Hôpital de la Cavale Blanche, Brest, France
| | - Emmanuel Gyan
- Federation hospitalo-universitaire « Grand Ouest against Leukemia », Nantes, France
- Service d'Hématologie et Thérapie Cellulaire, CHRU de Tours, Hôpital Bretonneau, Tours, France
| | - Alban Villate
- Federation hospitalo-universitaire « Grand Ouest against Leukemia », Nantes, France
- Service d'Hématologie et Thérapie Cellulaire, CHRU de Tours, Hôpital Bretonneau, Tours, France
| | - Stephan Ehrmann
- Service de Médecine Intensive et Réanimation, CHRU de Tours, Hôpital Bretonneau, Tours, France
| | | | | | | | - Gaelle Larhantec
- Pharmacie Oncologique, CHU de Brest, Hôpital Morvan, Brest, France
| | | | - Jérémie Riou
- Inserm, CNRS, MINT, SFR ICAT, Univ Angers, CHU Angers, Angers, France
| | - Mathilde Hunault-Berger
- Service des maladies du sang, CHU d'Angers, 4 rue LarreyAngers Cedex 9, F-49933, Angers, France
- Federation hospitalo-universitaire « Grand Ouest against Leukemia », Nantes, France
- Inserm UMR 1307, CNRS UMR 6075, Nantes Université, CRCI2NA, Université d'Angers, F-49000, Angers, France
| | - Aline Schmidt-Tanguy
- Service des maladies du sang, CHU d'Angers, 4 rue LarreyAngers Cedex 9, F-49933, Angers, France
- Federation hospitalo-universitaire « Grand Ouest against Leukemia », Nantes, France
- Inserm UMR 1307, CNRS UMR 6075, Nantes Université, CRCI2NA, Université d'Angers, F-49000, Angers, France
| | - Corentin Orvain
- Service des maladies du sang, CHU d'Angers, 4 rue LarreyAngers Cedex 9, F-49933, Angers, France.
- Federation hospitalo-universitaire « Grand Ouest against Leukemia », Nantes, France.
- Inserm UMR 1307, CNRS UMR 6075, Nantes Université, CRCI2NA, Université d'Angers, F-49000, Angers, France.
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Duarte M, Djaló M, Arpacıoğlu M, Neuparth T, Cunha A, André V. The interplay of strong and weak intra- and intermolecular hydrogen bonds in Sparfloxacin multicomponent forms: how it affects stability and solubility. Acta Cryst Sect A 2022. [DOI: 10.1107/s2053273322090507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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Harbeck N, Rastogi P, Martin M, Tolaney SM, Shao ZM, Fasching PA, Huang CS, Jaliffe GG, Tryakin A, Goetz MP, Rugo HS, Senkus E, Testa L, Andersson M, Tamura K, Del Mastro L, Steger GG, Kreipe H, Hegg R, Sohn J, Guarneri V, Cortés J, Hamilton E, André V, Wei R, Barriga S, Sherwood S, Forrester T, Munoz M, Shahir A, San Antonio B, Nabinger SC, Toi M, Johnston SRD, O'Shaughnessy J. Adjuvant abemaciclib combined with endocrine therapy for high-risk early breast cancer: updated efficacy and Ki-67 analysis from the monarchE study. Ann Oncol 2021; 32:1571-1581. [PMID: 34656740 DOI: 10.1016/j.annonc.2021.09.015] [Citation(s) in RCA: 185] [Impact Index Per Article: 61.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 09/22/2021] [Accepted: 09/27/2021] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Adjuvant abemaciclib combined with endocrine therapy (ET) previously demonstrated clinically meaningful improvement in invasive disease-free survival (IDFS) and distant relapse-free survival (DRFS) in hormone receptor-positive, human epidermal growth factor receptor 2-negative, node-positive, high-risk early breast cancer at the second interim analysis, however follow-up was limited. Here, we present results of the prespecified primary outcome analysis and an additional follow-up analysis. PATIENTS AND METHODS This global, phase III, open-label trial randomized (1 : 1) 5637 patients to adjuvant ET for ≥5 years ± abemaciclib for 2 years. Cohort 1 enrolled patients with ≥4 positive axillary lymph nodes (ALNs), or 1-3 positive ALNs and either grade 3 disease or tumor ≥5 cm. Cohort 2 enrolled patients with 1-3 positive ALNs and centrally determined high Ki-67 index (≥20%). The primary endpoint was IDFS in the intent-to-treat population (cohorts 1 and 2). Secondary endpoints were IDFS in patients with high Ki-67, DRFS, overall survival, and safety. RESULTS At the primary outcome analysis, with 19 months median follow-up time, abemaciclib + ET resulted in a 29% reduction in the risk of developing an IDFS event [hazard ratio (HR) = 0.71, 95% confidence interval (CI) 0.58-0.87; nominal P = 0.0009]. At the additional follow-up analysis, with 27 months median follow-up and 90% of patients off treatment, IDFS (HR = 0.70, 95% CI 0.59-0.82; nominal P < 0.0001) and DRFS (HR = 0.69, 95% CI 0.57-0.83; nominal P < 0.0001) benefit was maintained. The absolute improvements in 3-year IDFS and DRFS rates were 5.4% and 4.2%, respectively. Whereas Ki-67 index was prognostic, abemaciclib benefit was consistent regardless of Ki-67 index. Safety data were consistent with the known abemaciclib risk profile. CONCLUSION Abemaciclib + ET significantly improved IDFS in patients with hormone receptor-positive, human epidermal growth factor receptor 2-negative, node-positive, high-risk early breast cancer, with an acceptable safety profile. Ki-67 index was prognostic, but abemaciclib benefit was observed regardless of Ki-67 index. Overall, the robust treatment benefit of abemaciclib extended beyond the 2-year treatment period.
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Affiliation(s)
- N Harbeck
- Breast Center, Department of OB & GYN and CCC Munich, LMU University Hospital, Munich, Germany.
| | - P Rastogi
- University of Pittsburgh/UPMC, NSABP Foundation, Pittsburgh, USA
| | - M Martin
- Hospital General Universitario Gregorio Marañon, Universidad Complutense, CIBERONC, GEICAM, Madrid, Spain
| | | | - Z M Shao
- Fudan University Shanghai Cancer Center, Shanghai, China
| | - P A Fasching
- University Hospital Erlangen, Department of Gynecology and Obstetrics, Comprehensive Cancer Center Erlangen-EMN, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - C S Huang
- National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - G G Jaliffe
- Grupo Medico Camino S.C., Mexico City, Mexico
| | - A Tryakin
- N.N.Blokhin Russian Cancer Research Center, Moscow, Russia
| | | | - H S Rugo
- Department of Medicine (Hematology/Oncology), University of California San Francisco, San Francisco, USA
| | - E Senkus
- Department of Oncology & Radiotherapy, Medical University of Gdańsk, Gdańsk, Poland
| | - L Testa
- Instituto D'Or de Pesquisa e Ensino (IDOR), Sao Paulo, Brazil
| | | | - K Tamura
- National Cancer Center Hospital, Tokyo, Japan
| | - L Del Mastro
- IRCSS Ospedale Policlinico San Martino, UO Breast Unit, Genoa, Italy; Università di Genova, Department of Internal Medicine and Medical Specialties (DIM), Genoa, Italy
| | - G G Steger
- Medical University of Vienna, Vienna, Austria
| | - H Kreipe
- Medizinische Hochschule Hannover, Hannover, Germany
| | - R Hegg
- Clin. Pesq. e Centro São Paulo, São Paulo, Brazil
| | - J Sohn
- Yonsei Cancer Center, Seoul, Korea
| | - V Guarneri
- Department of Surgery, Oncology and Gastroenterology, University of Padova, Padua, Italy; Istituto Oncologico Veneto IOV-IRCCS, Padua, Italy
| | - J Cortés
- International Breast Cancer Center (IBCC), Madrid & Barcelona, and Vall d'Hebron Institute of Oncology, Barcelona, Spain; Universidad Europea de Madrid, Faculty of Biomedical and Health Sciences, Department of Medicine, Madrid, Spain
| | - E Hamilton
- Sarah Cannon Research Institute/Tennessee Oncology, Nashville, USA
| | - V André
- Eli Lilly and Company, Indianapolis, USA
| | - R Wei
- Eli Lilly and Company, Indianapolis, USA
| | - S Barriga
- Eli Lilly and Company, Indianapolis, USA
| | - S Sherwood
- Eli Lilly and Company, Indianapolis, USA
| | | | - M Munoz
- Eli Lilly and Company, Indianapolis, USA
| | - A Shahir
- Eli Lilly and Company, Indianapolis, USA
| | | | | | - M Toi
- Kyoto University Hospital, Kyoto, Japan
| | | | - J O'Shaughnessy
- Baylor University Medical Center, Texas Oncology, US Oncology, Dallas, USA
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Lemasson A, André V, Boudard M, Lunel C, Lippi D, Cousillas H, Hausberger M. Does audience size influence actors' and spectators' emotions the same way? Psychol Res 2020; 85:1814-1822. [PMID: 32405663 DOI: 10.1007/s00426-020-01349-6] [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] [Received: 05/15/2019] [Accepted: 04/22/2020] [Indexed: 11/24/2022]
Abstract
Better understanding how audience size influences emotions and behaviours during public performances is of particular importance since it may both impact the level of anxiety and quality of achievement of the performer and alter the degree of appreciation of the observer. We tested this question in a naturalistic setting by analyzing self-assessment questionnaires, Galvanic skin responses and behaviours of actors and spectators during theatrical representations with small, medium and large audiences. We found that: actors and spectators differed in their perception of the effects of audience size; the different components of emotions (cognitive, physiological, behavioural) were affected differently by audience size, which was also modulated by the individual's status; actors and spectators differed in their representation of the others' emotional state. Although our study remains exploratory, our findings highlight the complexity of the audience effect when comparing observers' and performers' emotions.
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Affiliation(s)
- A Lemasson
- Univ Rennes, Normandie Univ, CNRS, EthoS (Ethologie animale et humaine) - UMR 6552, 35000, Rennes, France.
| | - V André
- Univ Rennes, Normandie Univ, CNRS, EthoS (Ethologie animale et humaine) - UMR 6552, 35000, Rennes, France
| | - M Boudard
- Univ Rennes, Normandie Univ, CNRS, EthoS (Ethologie animale et humaine) - UMR 6552, 35000, Rennes, France
| | - C Lunel
- Univ Rennes, Normandie Univ, CNRS, EthoS (Ethologie animale et humaine) - UMR 6552, 35000, Rennes, France
| | - D Lippi
- Fabrique Autonome Des Acteurs, 57770, Moussey, France
| | - H Cousillas
- Univ Rennes, Normandie Univ, CNRS, EthoS (Ethologie animale et humaine) - UMR 6552, 35000, Rennes, France
| | - M Hausberger
- Univ Rennes, Normandie Univ, CNRS, EthoS (Ethologie animale et humaine) - UMR 6552, 35000, Rennes, France
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Shemchuk O, André V, Duarte MT, Braga D, Grepioni F. Mechanochemical preparation of molecular and ionic co-crystals of the hormone melatonin. CrystEngComm 2019. [DOI: 10.1039/c9ce00316a] [Citation(s) in RCA: 8] [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
Molecular and ionic co-crystals of melatonin with piperazine, DABCO and CaCl2 were obtained via kneading with ethanol: the solubility of melatonin in H2O increases by an order of magnitude when combined with CaCl2.
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Affiliation(s)
- O. Shemchuk
- Molecular Crystal Engineering Laboratory
- Dipartimento di Chimica “G. Ciamician”
- Università di Bologna
- 40126 Bologna
- Italy
| | - V. André
- Centro de Química Estrutural
- Instituto Superior Técnico
- 1049-001 Lisboa
- Portugal
| | - M. T. Duarte
- Centro de Química Estrutural
- Instituto Superior Técnico
- 1049-001 Lisboa
- Portugal
| | - D. Braga
- Molecular Crystal Engineering Laboratory
- Dipartimento di Chimica “G. Ciamician”
- Università di Bologna
- 40126 Bologna
- Italy
| | - F. Grepioni
- Molecular Crystal Engineering Laboratory
- Dipartimento di Chimica “G. Ciamician”
- Università di Bologna
- 40126 Bologna
- Italy
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Rugo H, Tolaney S, Huober J, Toi M, André V, Barriga S, Forrester T, Sledge G, Goetz M. Management of abemaciclib associated adverse events in patients with hormone receptor positive (HR+), HER2- advanced breast cancer: Analysis of the MONARCH trials. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy272.329] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Barraud C, Corbière C, Pottier I, Estace E, Blanchard K, Logie C, Lagadu S, Kéravec V, Pottier D, Dionnet F, Morin J, Préterre D, André V, Monteil C, Sichel F. Impact of after-treatment devices and biofuels on diesel exhausts genotoxicity in A549 cells exposed at air-liquid interface. Toxicol In Vitro 2017; 45:426-433. [DOI: 10.1016/j.tiv.2017.04.025] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2016] [Revised: 04/03/2017] [Accepted: 04/26/2017] [Indexed: 11/28/2022]
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Fenot M, Riegert M, Poiraud C, Gegu M, André V. [Extensive cutaneous lesions]. Rev Med Interne 2017; 40:60-61. [PMID: 28844396 DOI: 10.1016/j.revmed.2017.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 07/22/2017] [Indexed: 11/26/2022]
Affiliation(s)
- M Fenot
- Service de dermatologie, CHD Vendée, Les Oudairies, boulevard Stéphane-Moreau, 85925 La Roche-sur-Yon, France.
| | - M Riegert
- Cabinet libéral de dermatologie, 48, rue de Verdun, 85000 La Roche-sur-Yon, France
| | - C Poiraud
- Service de dermatologie, CHD Vendée, Les Oudairies, boulevard Stéphane-Moreau, 85925 La Roche-sur-Yon, France
| | - M Gegu
- Service de gériatrie, CHD Vendée, Les Oudairies, boulevard Stéphane-Moreau, 85925 La Roche-sur-Yon, France
| | - V André
- Service de rhumatologie, CHD Vendée, Les Oudairies, boulevard Stéphane-Moreau, 85925 La Roche-sur-Yon, France
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Moreau D, Gazaille V, Allou N, Fernandez C, André V, André M. [Multiple ground-glass opacities nodules]. Rev Pneumol Clin 2017; 73:146-150. [PMID: 28413146 DOI: 10.1016/j.pneumo.2017.02.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Revised: 02/02/2017] [Accepted: 02/21/2017] [Indexed: 06/07/2023]
Abstract
INTRODUCTION Ground-glass opacities nodules are frequently detected with the advances of radiological imaging. These can be preinvasive lesions such as atypical adenomatous hyperplasia but also invasive lesions. It leads to question in patients with lung cancer about treatment strategy and follow up. CASE REPORT We report the case of a 72 years-old woman followed for a lung adenocarcinoma with an EGFR mutation of the right upper lobe stage IIb. The CT scan shows multiple pure ground-glass opacities in the same lobe of the primitive tumor but also in the other lobe. On the piece of lobectomy, histopathology of two ground-glass opacities showed atypical adenomatous hyperplasia. CONCLUSION Ground-glass opacities nodules could be found in patients with an operable lung cancer. These can be multiple and match with atypical adenomatous hyperplasia but also carcinomas lesions. The radiological surveillance is still the standard. The strategy for surgical resection has to be defined especially in case of multiple lesions which can require repeated surgical resection.
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Affiliation(s)
- D Moreau
- Pneumologie, CHRU de la Réunion, Site Félix Guyon, allée des Topazes, CS 11021, 97400 Saint-Denis, France
| | - V Gazaille
- Pneumologie, CHRU de la Réunion, Site Félix Guyon, allée des Topazes, CS 11021, 97400 Saint-Denis, France
| | - N Allou
- Pneumologie, CHRU de la Réunion, Site Félix Guyon, allée des Topazes, CS 11021, 97400 Saint-Denis, France
| | - C Fernandez
- Pneumologie, CHRU de la Réunion, Site Félix Guyon, allée des Topazes, CS 11021, 97400 Saint-Denis, France
| | - V André
- Pneumologie, CHRU de la Réunion, Site Félix Guyon, allée des Topazes, CS 11021, 97400 Saint-Denis, France
| | - M André
- Pneumologie, CHRU de la Réunion, Site Félix Guyon, allée des Topazes, CS 11021, 97400 Saint-Denis, France.
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Ya C, Barbollat-Boutrand L, Muther C, Reymermier C, André V, Lamartine J. Identification et validation fonctionnelle de microARNs modulant la prolifération des kératinocytes humains ainsi que les étapes précoces de la différenciation épidermique. Ann Dermatol Venereol 2015. [DOI: 10.1016/j.annder.2015.04.047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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André V, Pot-Vaucel M, Cozic C, Visée E, Morrier M, Varin S, Cormier G. Septic arthritis of the facet joint. Med Mal Infect 2015; 45:215-21. [PMID: 25958100 DOI: 10.1016/j.medmal.2015.04.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Revised: 02/26/2015] [Accepted: 04/02/2015] [Indexed: 12/11/2022]
Abstract
OBJECTIVE Septic arthritis of the facet joint is a rare clinical entity. We report 11 cases of facet joint infections diagnosed in our institution. PATIENTS AND METHOD Patients were identified via the computerized patients record (PMSI). Their features were collected and compared with published data. RESULTS The clinical symptoms are similar to those of infectious spondylodiscitis: back pain with stiffness (11/11), fever (9/11), radicular pain (5/11), and asthenia. Ten patients presented with lumbar infection and 1 with dorsal infection. An inflammatory syndrome was observed in every case. A rapid access to spine MRI allowed making the diagnosis in every case, and assessing a potential extension of infection (epidural extension 5/11, paraspinal extension 5/11). Blood culture (8/11) or culture of spinal samples allowed identifying the causative bacterium in every case and adapting the antibiotic treatment. The bacteria identified in our series were different from previously reported ones, with less staphylococci. The origin of the infection was found in 4 cases. Another localization of infection was observed in 4 cases. The outcome was favorable with medical treatment in 10 cases. An abscess was surgically drained in 1 case. None of our patients presented with neurological complications, probably because of the rapid diagnosis. CONCLUSION Assessing the facet joint is essential in case of inflammatory back pain, and the radiologist must be asked to perform this examination.
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Affiliation(s)
- V André
- Service de rhumatologie, centre hospitalier départemental, site de La-Roche-sur-Yon-Les Oudairies, 85925 La-Roche-sur-Yon, France.
| | - M Pot-Vaucel
- Service de rhumatologie, centre hospitalier départemental, site de La-Roche-sur-Yon-Les Oudairies, 85925 La-Roche-sur-Yon, France
| | - C Cozic
- Service de rhumatologie, centre hospitalier départemental, site de La-Roche-sur-Yon-Les Oudairies, 85925 La-Roche-sur-Yon, France
| | - E Visée
- Service d'imagerie médicale, centre hospitalier départemental, site de La-Roche-sur-Yon, Les Oudairies 85925, La-Roche-sur-Yon, France
| | - M Morrier
- Services d'infectiologie, centre hospitalier départemental, site de La-Roche-sur-Yon, Les Oudairies, 85925 La-Roche-sur-Yon, France
| | - S Varin
- Service de rhumatologie, centre hospitalier départemental, site de La-Roche-sur-Yon-Les Oudairies, 85925 La-Roche-sur-Yon, France
| | - G Cormier
- Service de rhumatologie, centre hospitalier départemental, site de La-Roche-sur-Yon-Les Oudairies, 85925 La-Roche-sur-Yon, France
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Areias LRP, Ruivo EFP, Gonçalves LM, Duarte MT, André V, Moreira R, Lucas SD, Guedes RC. A unified approach toward the rational design of selective low nanomolar human neutrophil elastase inhibitors. RSC Adv 2015. [DOI: 10.1039/c5ra07783d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
A computer-aided campaign boosted the discovery of potent human neutrophil elastase (HNE) inhibitors.
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Affiliation(s)
- L. R. P. Areias
- Research Institute for Medicines (iMed.ULisboa)
- Faculty of Pharmacy
- Universidade de Lisboa
- 1649-003 Lisbon
- Portugal
| | - E. F. P. Ruivo
- Research Institute for Medicines (iMed.ULisboa)
- Faculty of Pharmacy
- Universidade de Lisboa
- 1649-003 Lisbon
- Portugal
| | - L. M. Gonçalves
- Research Institute for Medicines (iMed.ULisboa)
- Faculty of Pharmacy
- Universidade de Lisboa
- 1649-003 Lisbon
- Portugal
| | - M. T. Duarte
- Centro de Química Estrutural
- Instituto Superior Técnico
- Universidade de Lisboa
- 1049-001 Lisboa
- Portugal
| | - V. André
- Centro de Química Estrutural
- Instituto Superior Técnico
- Universidade de Lisboa
- 1049-001 Lisboa
- Portugal
| | - R. Moreira
- Research Institute for Medicines (iMed.ULisboa)
- Faculty of Pharmacy
- Universidade de Lisboa
- 1649-003 Lisbon
- Portugal
| | - S. D. Lucas
- Research Institute for Medicines (iMed.ULisboa)
- Faculty of Pharmacy
- Universidade de Lisboa
- 1649-003 Lisbon
- Portugal
| | - R. C. Guedes
- Research Institute for Medicines (iMed.ULisboa)
- Faculty of Pharmacy
- Universidade de Lisboa
- 1649-003 Lisbon
- Portugal
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André V, Barraud C, Capron D, Preterre D, Keravec V, Vendeville C, Cazier F, Pottier D, Morin JP, Sichel F. Comparative mutagenicity and genotoxicity of particles and aerosols emitted by the combustion of standard vs. rapeseed methyl ester supplemented bio-diesel fuels: impact of after treatment devices: oxidation catalyst and particulate filter. Mutat Res Genet Toxicol Environ Mutagen 2014; 777:33-42. [PMID: 25726173 DOI: 10.1016/j.mrgentox.2014.11.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Revised: 11/27/2014] [Accepted: 11/29/2014] [Indexed: 01/05/2023]
Abstract
Diesel exhausts are partly responsible for the deleterious effects on human health associated with urban pollution, including cardiovascular diseases, asthma, COPD, and possibly lung cancer. Particulate fraction has been incriminated and thus largely investigated for its genotoxic properties, based on exposure conditions that are, however, not relevant for human risk assessment. In this paper, original and more realistic protocols were used to investigate the hazards induced by exhausts emitted by the combustion of standard (DF0) vs. bio-diesel fuels (DF7 and DF30) and to assess the impact of exhaust treatment devices (DOC and DPF). Mutagenicity and genotoxicity were evaluated for (1) resuspended particles ("off line" exposure that takes into account the bioavailability of adsorbed chemicals) and for (2) the whole aerosols (particles+gas phase components) under continuous flow exposure ("on line" exposure). Native particles displayed mutagenic properties associated with nitroaromatic profiles (YG1041), whereas PAHs did not seem to be involved. After DOC treatment, the mutagenicity of particles was fully abolished. In contrast, the level of particle deposition was low under continuous flow exposure, and the observed mutagenicity in TA98 and TA102 was thus attributable to the gas phase. A bactericidal effect was also observed in TA102 after DOC treatment, and a weak but significant mutagenicity persisted after DPF treatment for bio-diesel fuels. No formation of bulky DNA-adducts was observed on A549 cells exposed to diesel exhaust, even in very drastic conditions (organic extracts corresponding to 500 μg equivalent particule/mL, 48 h exposure). Taken together, these data indicate that the exhausts issued from the bio-diesel fuels supplemented with rapseed methyl ester (RME), and generated by current diesel engines equipped with after treatment devices are less mutagenic than older ones. The residual mutagenicity is linked to the gas phase and could be due to pro-oxydants, mainly for RME-supplemented fuels.
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Affiliation(s)
- V André
- Normandie Univ, France; UNICAEN, ABTE EA4651, F-14032 Caen, France; Centre François Baclesse, F-14076 Caen, France.
| | - C Barraud
- Normandie Univ, France; UNICAEN, ABTE EA4651, F-14032 Caen, France; Centre François Baclesse, F-14076 Caen, France
| | - D Capron
- Normandie Univ, France; UNICAEN, ABTE EA4651, F-14032 Caen, France; Centre François Baclesse, F-14076 Caen, France
| | - D Preterre
- Normandie Univ, France; UR, ABTE EA4651, F-760183 Rouen, France; CERTAM, F-76800 St Etienne du Rouvray, France
| | - V Keravec
- Normandie Univ, France; UR, ABTE EA4651, F-760183 Rouen, France; CERTAM, F-76800 St Etienne du Rouvray, France
| | - C Vendeville
- Normandie Univ, France; UR, ABTE EA4651, F-760183 Rouen, France
| | - F Cazier
- ULCO, Centre Commun de Mesure, F-59140 Dunkerque, France
| | - D Pottier
- Normandie Univ, France; UNICAEN, ABTE EA4651, F-14032 Caen, France; Centre François Baclesse, F-14076 Caen, France
| | - J P Morin
- Normandie Univ, France; UR, ABTE EA4651, F-760183 Rouen, France
| | - F Sichel
- Normandie Univ, France; UNICAEN, ABTE EA4651, F-14032 Caen, France; Centre François Baclesse, F-14076 Caen, France
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Cozic C, Le Goff B, André V, Guimard T, Cormier G. Une neuroborréliose compliquée d’insuffisance surrénalienne aiguë. Med Mal Infect 2013; 43:251-3. [DOI: 10.1016/j.medmal.2013.05.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2012] [Revised: 04/19/2013] [Accepted: 05/22/2013] [Indexed: 10/26/2022]
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Darrieutort-Laffite C, André V, Leautez S, Tanguy G, Cormier G. Arthrites septiques à Staphylococcus caprae. Med Mal Infect 2013; 43:131-2. [DOI: 10.1016/j.medmal.2013.01.003] [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] [Received: 10/01/2012] [Revised: 10/08/2012] [Accepted: 01/09/2013] [Indexed: 10/27/2022]
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Pisella L, André V, Gavault E, Le Flem A, Luc-Pupat E, Glissoux C, Barrière A, Vindras P, Rossetti Y, Gonzalez-Monge S. A test revealing the slow acquisition and the dorsal stream substrate of visuo-spatial perception. Neuropsychologia 2012; 51:106-13. [PMID: 23174400 DOI: 10.1016/j.neuropsychologia.2012.11.015] [Citation(s) in RCA: 14] [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] [Received: 07/12/2012] [Revised: 11/06/2012] [Accepted: 11/10/2012] [Indexed: 10/27/2022]
Abstract
We propose a battery of simple clinical tests to assess the development of elementary visuo-spatial perception. We postulate that most of the tasks we selected rely on the visual dorsal stream, although the dual-stream theory (Milner & Goodale, 1995) discards the role of the dorsal stream for visual perception. In order to test the contribution of this anatomical substrate in visuo-spatial perception, we evaluated the performance of two adult patients with acquired bilateral occipito-parietal (dorsal stream) damage. Additionally, the developmental evolution was assessed by testing 96 children from 4 to 12 years old (4 two-year age groups of 24 children). In order to determine the point at which children achieved adult performance, and to provide a control group for the two patients, we also tested a group of 14 healthy adults. The results highlighted the necessity for age-dependent normative values: adult performance was achieved only at the age of 8 for length and size comparisons and at 12 for dot localisation. In contrast, the ability to judge angles and midlines did not reach adult performance even in the oldest group of children, suggesting further acquisition through adolescence. Occipito-parietal lesions strongly and differentially affected elementary visuo-spatial tasks. In overall scores, the two adult patients were approximately at the level of 6-year olds, below the outlier limit of the adult group. They were on average within the adult interquartile range for processing length and size but clearly outside for the 4 other subtests (Angle, Midline, Position perception and Position selection). As a whole, these data both shed light on the neuroanatomical bases of visuo-spatial perception and allow for age-specific comparisons in children with developmental disorders potentially linked to visuo-spatial and/or attentional defects.
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Affiliation(s)
- L Pisella
- Impact-Centre de Recherche en Neurosciences de Lyon, Inserm U 1028, CNRS UMR 5092, Université de Lyon, Bron F-69500, France
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André V, Longoni D, Bresolin S, Cappuzzello C, Dander E, Galbiati M, Bugarin C, Di Meglio A, Nicolis E, Maserati E, Serafini M, Warren AJ, Te Kronnie G, Cazzaniga G, Sainati L, Cipolli M, Biondi A, D'Amico G. Mesenchymal stem cells from Shwachman-Diamond syndrome patients display normal functions and do not contribute to hematological defects. Blood Cancer J 2012; 2:e94. [PMID: 23064742 PMCID: PMC3483621 DOI: 10.1038/bcj.2012.40] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Shwachman–Diamond syndrome (SDS) is a rare inherited disorder characterized by bone marrow (BM) dysfunction and exocrine pancreatic insufficiency. SDS patients have an increased risk for myelodisplastic syndrome and acute myeloid leukemia. Mesenchymal stem cells (MSCs) are the key component of the hematopoietic microenvironment and are relevant in inducing genetic mutations leading to leukemia. However, their role in SDS is still unexplored. We demonstrated that morphology, growth kinetics and expression of surface markers of MSCs from SDS patients (SDS-MSCs) were similar to normal MSCs. Moreover, SDS-MSCs were able to differentiate into mesengenic lineages and to inhibit the proliferation of mitogen-activated lymphocytes. We demonstrated in an in vitro coculture system that SDS-MSCs, significantly inhibited neutrophil apoptosis probably through interleukin-6 production. In a long-term coculture with CD34+-sorted cells, SDS-MSCs were able to sustain CD34+ cells survival and to preserve their stemness. Finally, SDS-MSCs had normal karyotype and did not show any chromosomal abnormality observed in the hematological components of the BM of SDS patients. Despite their pivotal role in the hematopoietic stem cell niche, our data suggest that MSC themselves do not seem to be responsible for the hematological defects typical of SDS patients.
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Affiliation(s)
- V André
- Centro Ricerca 'M Tettamanti', Clinica Pediatrica Università degli Studi di Milano-Bicocca, Ospedale San Gerardo, Monza, Italy
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Lequeux C, Auxenfans C, Thépot A, Géloën A, André V, Damour O, Mojallal A. A simple way to reconstruct a human 3-d hypodermis: a useful tool for pharmacological functionality. Skin Pharmacol Physiol 2011; 25:47-55. [PMID: 21986296 DOI: 10.1159/000330904] [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] [Received: 03/21/2011] [Accepted: 07/06/2011] [Indexed: 01/07/2023]
Abstract
BACKGROUND Adipose tissue engineering has been hampered by the inability to culture mature adipocytes. Adipose-derived stem cell (ASC) culture opens the way for the preparation of human 3-D hypodermis in large quantities. These models play a role in obesity-related active molecules and slimming agent screening. Moreover, they contribute to a better understanding of the mechanisms underpinning obesity. MATERIALS AND METHODS Freshly extracted ASC from fat tissue were characterized by flow cytometry for CD73, CD90, CD105, HLA-ABC, CD14 and CD45 markers and by Western blot for pref-1. Their differentiation in mature adipocytes was followed by lipid and adiponectin secretion or by oil red O staining and radioimmunoassay. Neosynthesized extracellular matrix (ECM) of 3-D hypodermis was investigated by immunohistochemistry (collagen type I, V and VI) and transmission electron microscopy. RESULTS Our results demonstrate that the culture of preadipocytes in proliferation medium for 15 days followed by 16 days of culture in differentiation medium allowed production of the thickest single-layer hypodermis in which preadipocytes and mature adipocytes coexist and synthesize adiponectin and ECM components. Functionality of our 3-D single-layer hypodermis was demonstrated both by a 3.5-fold glycerol production after its stimulation with norepinephrine (adrenergic agonist) and by its slimming after caffeine treatment versus the nontreated 3-D hypodermis. CONCLUSION This economic 3-D model, easy to prepare and giving reproducible results after the treatment of actives, is useful for pharmacotoxicological trials as an alternative to animal experimentation.
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Affiliation(s)
- C Lequeux
- Banque de Tissus et Cellules, Hôpital Edouard Herriot, Lyon, France. charlotte.lequeux @ chu-lyon.fr
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André V, Friščić T, Halasz I, Curfs C, Duarte MT. Waste-free synthesis of the metallodrug bismuth subsalicylate. Acta Crystallogr A 2011. [DOI: 10.1107/s010876731109324x] [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: 11/11/2022] Open
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Duarte MT, André V, Grepioni F, Rodriguez-Hornedo N, Maheshwari C. Synthon competition in new pharmaceutical forms: how crystal structure affects properties. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311090817] [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: 11/10/2022] Open
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André V, Billet S, Pottier D, Le Goff J, Pottier I, Garçon G, Shirali P, Sichel F. Mutagenicity and genotoxicity of PM2.5 issued from an urbano-industrialized area of Dunkerque (France). J Appl Toxicol 2011; 31:131-8. [PMID: 20687134 DOI: 10.1002/jat.1572] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Epidemiological studies have demonstrated the link between chronic exposure to particulate matter (PM), especially particles with an aerodynamic diameter lesser than 2.5 µm (PM(2.5) ), and lung cancer. Mechanistic investigations focus on the contribution of the various genotoxicants adsorbed onto the particles, and more particularly on polycyclic aromatic hydrocarbons or nitroaromatics. Most of the previous studies dealing with genotoxic and/or mutagenic measurements were performed on organic extracts obtained from PM(2.5) collected in polluted areas. In contrast, we have evaluated genotoxic and mutagenic properties of urbano-industrial PM(2.5) (PM) collected in Dunkerque (France). Thermally desorbed PM(2.5) (dPM) was also comparatively studied. Suspensions of PM and dPM (5-50 µg per plate) were tested in Salmonella tester strains TA98, TA102 and YG1041 ± S9mix. Significant mutagenicity was observed for PM in YG1041 ± S9 mix. In strain TA102 - S9mix, a slight, but not significant dose-response increase was observed, for both PM and dPM. Genotoxic properties of PM and dPM were evaluated by the measurement of (1) 8-OHdG in A549 cells and (2) bulky DNA adducts on A549 cells and on human alveolar macrophages (AMs) in primary culture. A dose-dependant formation of 8-OHdG adducts was observed on A549 cells for PM and dPM, probably mainly attributed to the core of the particles. Bulky DNA adducts were observed only in AMs after exposure to PM and dPM. In conclusion, using relevant exposure models, suspension of PM(2.5) induces a combination of DNA-interaction mechanisms, which could contribute to the induction of lung cancer in exposed populations.
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Affiliation(s)
- V André
- Groupe Régional d'Etudes sur le Cancer (GRECAN) EA1772 et IFR 146 (ICORE), Université de Caen Basse-Normandie et Centre François Baclesse, Caen, France.
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Graveleau J, Néel A, André V, Masseau A, Hamidou M. Pleuropéricardite sévère sous PEG-Interféron. Rev Med Interne 2011. [DOI: 10.1016/j.revmed.2011.03.225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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André V, Longoni D, Cipolli M, Biondi A, D'Amico G. 194 Phenotypical and functional characterization of mesenchymal stem cells derived from patients affected by Shwachman-Diamond syndrome. Leuk Res 2011. [DOI: 10.1016/s0145-2126(11)70196-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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André V, Longoni D, Cipolli M, Biondi A, D'Amico G. Phenotypical and Functional Characterization of Mesenchymal Stem Cells Derived From Patients Affected by Schwachman-Diamond Syndrome. Biol Blood Marrow Transplant 2011. [DOI: 10.1016/j.bbmt.2010.12.213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Sohm B, Cenizo V, André V, Zahouani H, Pailler-Mattei C, Vogelgesang B. Evaluation of the efficacy of a dill extract in vitro and in vivo. Int J Cosmet Sci 2010; 33:157-63. [DOI: 10.1111/j.1468-2494.2010.00606.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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André V, Masseau A, Agard C, Ponge T, Pottier P, Gueffet JP, Fenollar F, Brisseau JM. Maladie de Whipple : série rétrospective de 9 patients au CHU de Nantes. Rev Med Interne 2010. [DOI: 10.1016/j.revmed.2010.03.375] [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]
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Néel A, André V, Masseau A, Touzeau C, Andreu M, Dejoie T, Hamidou M. Maladie des chaînes lourdes gamma associée à une lymphoprolifération clonale TCD8+ : 2 observations. Rev Med Interne 2010. [DOI: 10.1016/j.revmed.2010.03.162] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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André V, Zosel A. Dynamic wetting on porous and non porous substrates. Influence of surface tension, viscosity and porosity. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19940980333] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [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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Pain S, Dezutter C, Reymermier C, Vogelgesang B, Delay E, André V. Age-related changes in pro-opiomelanocortin (POMC) and related receptors in human epidermis. Int J Cosmet Sci 2010; 32:266-75. [PMID: 20384899 DOI: 10.1111/j.1468-2494.2009.00569.x] [Citation(s) in RCA: 14] [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: 11/26/2022]
Abstract
SYNOPSIS Much effort has been placed in cosmetic research for better understanding of the effects of ageing on skin's appearance, structure, mechanical properties and function. It is now of common knowledge that UV radiations induce pre-mature skin ageing notably in the epidermis where UV radiations induce keratinocyte differentiation. As UV radiations have also been shown to regulate the pro-opiomelanocortin (POMC) peptide family in the skin and because no study has been conducted so far to investigate the age-related changes in POMC and related receptors, we analysed POMC, MC-1R, MC-2R and MOR-1 at mRNA level and MC-1R, MC-2R and MOR-1 at protein level too in primary cultures of normal human keratinocytes obtained from female donors aged from 17 to 75 years old. Regarding the gene expressions, we observed that MC-1R, MC-2R and MOR-1 suffered a dramatic decrease after 50 years of age, whereas POMC increased five-fold. Western blot analysis confirmed these results except for MOR-1 whose expression appeared to decrease at older age, around 70 years old. Immunostainings specific to MC-1R, MC-2R and MOR-1 performed on full-thickness skin biopsies also revealed an intense staining in the basal and spinous layers of a 30-year-old donor, whereas no reactivity could be observed in a 60-year-old one. We conclude that POMC and POMC-related receptors suffer a dramatically disturbed balance with ageing and that this may be implicated in the general process of skin ageing.
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Affiliation(s)
- S Pain
- BASF Beauty Care Solutions, 32 rue Saint Jean de Dieu, 69007 Lyon, France.
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Lapierre-Combes M, Rousset J, Combes E, Chinelatto S, Dupré PF, André V. [Retrospective study conducted in northern Finistère about the role of breast MRI in normal breast screening, experience in 51 patients]. ACTA ACUST UNITED AC 2009; 37:401-9. [PMID: 19403322 DOI: 10.1016/j.gyobfe.2009.02.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2008] [Accepted: 02/24/2009] [Indexed: 11/19/2022]
Abstract
OBJECTIVES To study the role and indications of breast MRI in normal breast screening. PATIENTS AND METHODS Retrospective study of 51 patients (mean age of 51 years) conducted in northern Finistère. Each patient had a normal (BI-RADS 1 or 2) breast screening (mammography and echography). Four indications for MRI were chosen: screening of high-risk patients, high-density breasts, radio-clinical discordance, and breasts prostheses. Breast MRI were reviewed according to BI-RADS classification. Abnormalities categorized in BI-RADS 4 or 5 were confirmed histologically. RESULTS Thirteen patients underwent histological analysis. Nine invasive carcinomas were identified (six invasive lobular carcinomas (ILC), two mixed carcinomas, one invasive ductal carcinoma). For these patients, the reason for performing MRI was a radio-clinical discordance. DISCUSSION AND CONCLUSION The study demonstrates the breast MRI value for radio-clinical discordance and the key role of MRI in diagnostic challenge of ILC. In literature review, MRI has a role even if breast screening is normal: radio-clinical discordance, screening of patients with high-risk, breasts prostheses in certain cases. Breast density comes as an additional criteria to perform this exam.
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Affiliation(s)
- M Lapierre-Combes
- Service d'imagerie médicale, hôpital d'instruction des armées Clermont-Tonnerre, BP 41, 29240 Brest Armées, France.
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Rousset J, Lapierre M, André V, Bellard S, Garcia J. Dilatation des veines épidurales cervicales au cours d’une hypotension intracrânienne iatrogène. ACTA ACUST UNITED AC 2009; 90:69-71. [DOI: 10.1016/s0221-0363(09)70082-4] [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: 10/21/2022]
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André V, Robin S, Rousseau G. Preparation of halo enol phostones by reaction of acetylenic phosphonate monoesters with (bis-collidine)halo hexafluorophosphate. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.06.037] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Blasco H, Silly S, Tournamille JF, Gyan E, Sénécal D, André V, Colombat P, Guellec CL. Les critères d’utilisation de la carboxypeptidase dans les surexpositions au méthotrexate doivent être mieux définis. Therapie 2008; 63:19-28. [DOI: 10.2515/therapie:2008013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2007] [Accepted: 02/22/2008] [Indexed: 11/20/2022]
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Dange C, Phan TNT, André V, Rieger J, Persello J, Foissy A. Adsorption mechanism and dispersion efficiency of three anionic additives [poly(acrylic acid), poly(styrene sulfonate) and HEDP] on zinc oxide. J Colloid Interface Sci 2007; 315:107-15. [PMID: 17720181 DOI: 10.1016/j.jcis.2007.03.068] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2006] [Revised: 03/21/2007] [Accepted: 03/22/2007] [Indexed: 11/20/2022]
Abstract
Adsorption on ZnO of sodium poly(acrylate) (PAA), sodium poly(styrene sulfonate) (PSS) and a monomer surfactant [hydroxyethylidene diphosphonate (HEDP)] was investigated in suspensions initially equilibrated at pH 7. Results demonstrate interplay in the adsorption mechanism between zinc complexation, salt precipitation, and ZnO dissolution. In the case of PAA, the adsorption isotherm exhibits a maximum attributed to the precipitation of zinc polyacrylate. PSS and HEDP formed high-affinity adsorption isotherms, but the plateau adsorption of HEDP was significantly lower than that of PSS. The adsorption isotherm of each additive is divided into two areas. At low additive concentration (high zinc/additive ratio), the total zinc concentration in the solution decreased and the pH increased upon addition. At a higher additive ratio, zinc concentration and pH increased with the organic concentration. The increase in pH is due to the displacement of hydroxyl ions from the surface and the increase in zinc concentration results from the dissolution of ZnO due to the complexation of zinc ions by the organics. The stability of the ZnO dispersions was investigated by measurement of the particle size distribution after addition of various amounts of polymers. The three additives stabilized the ZnO dispersions efficiently once full surface coverage was reached.
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Affiliation(s)
- C Dange
- UFR Sciences et Techniques, 16 route de Gray, 25030 Besançon cedex, France
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André V, Lahrache H, Robin S, Rousseau G. Reaction of unsaturated phosphonate monoesters with bromo- and iodo(bis-collidine) hexafluorophosphates. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.07.032] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [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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Builles N, Bechetoille N, Justin V, André V, Barbaro V, Di Iorio E, Auxenfans C, Hulmes DJS, Damour O. Development of a hemicornea from human primary cell cultures for pharmacotoxicology testing. Cell Biol Toxicol 2007; 23:279-92. [PMID: 17380411 DOI: 10.1007/s10565-006-0191-0] [Citation(s) in RCA: 20] [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] [Received: 10/17/2006] [Accepted: 12/15/2006] [Indexed: 12/30/2022]
Abstract
We report the reconstruction and characterization of a hemicornea (epithelialized stroma), using primary human cells, for use in research and as an alternative to the use of animals in pharmacotoxicology testing. To create a stromal equivalent, keratocytes from human corneas were cultured in collagen-glycosaminoglycan-chitosan foams. Limbal stem cell-derived epithelial cells were seeded on top of these, giving rise to hemi-corneas. The epithelium appeared morphologically similar to its physiological counterpart, as shown by the basal cell expression of p63 isoforms including, in some cases, the stem cell marker p63DeltaNalpha, and the expression of keratin 3 and 14-3-3sigma in the upper cell layers. In addition, the cuboidal basal epithelial cells were anchored to a basement membrane containing collagen IV, laminin 5, and hemidesmosomes. In the stromal part, the keratocytes colonized the porous scaffold, formed a network of interconnecting cells, and synthesized an ultrastructurally organized extracellular matrix (ECM) containing collagen types I, V, and VI. Electron microscopy showed the newly synthesized collagen fibrils to have characteristic periodic striations, with diameters and interfibril spacings similar to those found in natural corneas. Compared to existing models for corneal pharmacotoxicology testing, this new model more closely approaches physiological conditions by including the inducing effects of mesenchyme and cell-matrix interactions on epithelial cell morphogenesis.
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Affiliation(s)
- N Builles
- Banque de Cornées des Hospices Civils de Lyon, Lyon, France
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Le Goff J, Gallois J, Pelhuet L, Devier MH, Budzinski H, Pottier D, André V, Cachot J. DNA adduct measurements in zebra mussels, Dreissena polymorpha, Pallas. Potential use for genotoxicant biomonitoring of fresh water ecosystems. Aquat Toxicol 2006; 79:55-64. [PMID: 16780971 DOI: 10.1016/j.aquatox.2006.05.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2006] [Revised: 05/04/2006] [Accepted: 05/06/2006] [Indexed: 05/10/2023]
Abstract
The purpose of this study was to examine PAH accumulation and bulky DNA adduct formation in the digestive gland of zebra mussels exposed in their habitat or in controlled laboratory conditions to complex mixture of PAH. DNA adducts were measured using a 32P-postlabelling protocol with nuclease P1 enrichment adapted from Reddy and Randerath [Reddy, M.V., Randerath, K., 1986. Nuclease P1-mediated enhancement of sensitivity of 32P-postlabelling test for structurally diverse DNA adducts. Carcinogenesis 7, 1543-1551]. Specimens collected in the upper part of the Seine estuary were shown to accumulate higher levels of PAH (up to 1.6 microg g(-1) dry weight) in comparison to individuals from the reference site (0.053 microg g(-1) dry weight). The former exhibited elevated levels of DNA adducts (up to 4.0/10(8) nucleotides) and higher diversity of individual adducts with five distinct spots being specifically detected in individuals originating from the Seine estuary. Zebra mussels exposed for 5 days to 0.01% (v/v) of organic extract of sediment from the Seine estuary were shown to accumulate high amounts of PAH (up to 138 microg g(-1) dry weight) but exhibited relatively low levels of DNA adducts. Exposure to benzo[a]pyrene led to a dose-dependent accumulation of B[a]P (up to 7063 microg g(-1) dry weight) and a clear induction of DNA adduct formation in the digestive gland of mussels (up to 1.13/10(8) nucleotides). Comparisons with other bivalves exposed to the same model PAH, revealed similar levels of adducts and comparable adduct profiles with a main adduct spot and a second faint one. This study clearly demonstrated that zebra mussels are able to biotransform B[a]P and probably other PAH into reactive metabolites with DNA-binding activity. This work also demonstrated the applicability of the nuclease P1 enhanced 32P-postlabelling method for bulky adduct detection in the digestive gland of zebra mussels. DNA adduct measurement in zebra mussels could be a suitable biomarker to monitor PAH-exposure and evaluate genotoxicity in fresh water ecosystems.
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Affiliation(s)
- J Le Goff
- GRECAN, UPRES EA-1772, University of Caen, Caen, France
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Rocher B, Le Goff J, Peluhet L, Briand M, Manduzio H, Gallois J, Devier MH, Geffard O, Gricourt L, Augagneur S, Budzinski H, Pottier D, André V, Lebailly P, Cachot J. Genotoxicant accumulation and cellular defence activation in bivalves chronically exposed to waterborne contaminants from the Seine River. Aquat Toxicol 2006; 79:65-77. [PMID: 16834997 DOI: 10.1016/j.aquatox.2006.05.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2006] [Revised: 05/15/2006] [Accepted: 05/16/2006] [Indexed: 05/10/2023]
Abstract
The aim of the present work was to investigate genotoxicant accumulation and biological responses of zebra mussels and blue mussels collected along a pollution gradient in the Seine estuary and in the Seine Bay. The sampling area included three contaminated and one reference sites for each species. The study focused on polyaromatic hydrocarbons (PAH), lindane, polychlorobiphenyls (PCB) and metals known to be potential genotoxicants and/or reactive oxygen species (ROS) inducers. Enzymatic activities related to cellular defence systems including the phase II enzyme glutathione S-transferase (GST) and three antioxidant enzymes superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPx) were measured in gills. DNA adducts and DNA strand breaks (Comet assay) were measured in digestive gland and hemocytes, respectively. Species differences were observed in metal accumulation (As and Pb), GPx activity and DNA adduct formation. A marked upstream-downstream gradient was reported for PAH body burden and to a lesser extent for PCB and metals with the highest values measured just downstream the industrialized area of Rouen. GST and SOD activities in gills of bivalves were positively related to PAH and metals body burden, respectively. Activation of those cellular defences may prevent accumulation of electrophilic metabolites and free radicals and thus may protect DNA and others macromolecules against oxidation and adduction. Although DNA strand breaks and bulky adducts were detected in both species, levels were relatively low and no significant site differences were observed in June 2003. Our results indicate a clear relationship between genotoxicant accumulation and positive activation of detoxification and antioxidant systems but poor consequences in term of DNA damage for wild population of mussels inhabiting the Seine estuary.
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Affiliation(s)
- B Rocher
- Laboratory of Ecotoxicology (LEMA), UPRES-EA 3222, IFRMP 23, University of Le Havre, 25 rue Philippe Lebon, B.P. 540, 76058 Le Havre Cedex, France
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André V, Grenier S, Pivard F, Perrier E. Les modèles cellulaires 3D : un accès puissant à la physiologie cutanée et aux développements innovants de principes actifs cosmétiques. ACTA ACUST UNITED AC 2005; 53:618-26. [PMID: 16364814 DOI: 10.1016/j.patbio.2004.12.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2004] [Accepted: 12/03/2004] [Indexed: 10/25/2022]
Abstract
Two different anti-ageing cosmetic actives based respectively, on dermal compartment regeneration and on dermoepidermal reinforcement, have been developed using tissular engineering models. Conjointly use of different innovative three-dimensional models such as reconstructed dermis and skin built with human cells coming from variable aged donors allowed first, a better understanding of matrix modifications due to ageing and second, the screening of active ingredients highly targeted to reverse observed damages. The validity of such three-dimensional models has been then confirmed by in vivo studies on healthy volunteers.
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Affiliation(s)
- V André
- Coletica, 32, rue Saint-Jean-de-Dieu, 69007 Lyon, France.
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Peyre V, Lair V, André V, le Maire G, Kragh-Hansen U, le Maire M, Møller JV. Detergent binding as a sensor of hydrophobicity and polar interactions in the binding cavities of proteins. Langmuir 2005; 21:8865-75. [PMID: 16142972 DOI: 10.1021/la0507232] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
To evaluate the role of hydrophobic and electrostatic or other polar interactions for protein-ligand binding, we studied the interaction of human serum albumin (HSA) and beta-lactoglobulin with various aliphatic (C10-C14) cationic and zwitterionic detergents. We find that cationic detergents, at levels that do not cause unfolding, interact with a single site on beta-lactoglobulin and with two primary and five to six secondary sites on HSA with an affinity that is approximately the same as that with which zwitterionic (dimethylamineoxide) detergents interact, suggesting the absence of significant electrostatic interactions in the high-affinity binding of these compounds. The binding affinity for all of the groups of compounds was dependent upon hydrocarbon chain length, suggesting the predominant role of hydrophobic forces, supported by polar interactions at the protein surface. A distinct correlation between the binding energy and the propensity for micelle formation within the group of cationic or noncharged (nonionic and zwitterionic) detergents indicated that the critical micellar concentration (CMC) for each of these detergent groups, rather than the absolute length of the hydrocarbon chain, can be used to compare their hydrophobicities during their interaction with protein. Intrinsic fluorescence data suggest that the two primary binding sites on serum albumin for the zwitterionic and cationic compounds are located in the C-terminal part of the albumin molecule, possibly in the Sudlow II binding region. Comparisons with previous binding data on anionic amphiphiles emphasize the important contribution of ion bond formation and other polar interactions in the binding of fatty acids and dodecyl sulfate (SDS) by HSA but not by beta-lactoglobulin. Electrostatic interactions by cationic detergents played a significant role in destabilizing the protein structure at high binding levels, with beta-lactoglobulin being more susceptible to unfolding than HSA. Zwitterionic detergents, in contrast to the cationic detergents, had no tendency to unfold the proteins at high concentrations.
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Affiliation(s)
- Véronique Peyre
- Laboratoire d'Electrochimie et Chimie Analytique (UMR 7575), Université Pierre et Marie Curie, 4 place Jussieu, F-75252 Paris Cédex 05, France
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Le Goff J, André V, Lebailly P, Pottier D, Périn F, Périn O, Gauduchon P. Seasonal variations of DNA-adduct patterns in open field farmers handling pesticides. Mutat Res 2005; 587:90-102. [PMID: 16140568 DOI: 10.1016/j.mrgentox.2005.05.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2004] [Revised: 05/09/2005] [Accepted: 05/28/2005] [Indexed: 10/25/2022]
Abstract
Seasonal variations of DNA-adduct levels in peripheral blood cells were evaluated in open field farmers (n=26) by use of the 32P-postlabelling assay. Samples were collected before (sample S0) and during (sample S4) the period of intensive pesticide use. A similar sampling procedure was applied to a referent group (n=29). Exposure to pesticides was estimated via a detailed questionnaire. For the group of farmers, an increase in mean adduct level was observed during the season (mean RALS0=3.9+/-3.4 x 10(-10), mean RALS4=13.3+/-15.7 x 10(-10); p=0.008; RAL=relative adduct level). The mean adduct levels were significantly different between farmers and referents only in the S4 samples, with higher levels for farmers (p=0.02). The number of different adducts per individual was higher for farmers at S4 when compared with S0 (p=0.02) and compared with the referents at S4 (p=0.03). However, the increase of the adduct level in farmers did not seem to be attributable to the occurrence of specific new adducts in S4 as compared with S0, but was supposedly due to intensification of pre-existing spots and/or appearance of new unspecific ones. This would be in agreement with indirect genotoxic (epigenetic) effects known for several pesticides, even though a direct mechanism cannot be ruled out definitively. The implication of the pesticides used by the farmers in the modulation of DNA-adduct patterns was explored by analysis of exposure data obtained from the questionnaire.
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Affiliation(s)
- J Le Goff
- GRECAN (EA 1772/Université de Caen Basse-Normandie), Centre François Baclesse, Avenue du Général Harris, BP 5026, 14076 Caen Cedex 05, France.
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Nicolas X, André V, Vaillant PY, Zagnoli F, Bellard S. [Post-traumatic cerebral thrombophlebitis]. Presse Med 2002; 31:462. [PMID: 11933750] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/24/2023] Open
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André V, Marescaux C, Nehlig A, Fritschy JM. Alterations of hippocampal GAbaergic system contribute to development of spontaneous recurrent seizures in the rat lithium-pilocarpine model of temporal lobe epilepsy. Hippocampus 2002; 11:452-68. [PMID: 11530850 DOI: 10.1002/hipo.1060] [Citation(s) in RCA: 164] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Reorganization of excitatory and inhibitory circuits in the hippocampal formation following seizure-induced neuronal loss has been proposed to underlie the development of chronic seizures in temporal lobe epilepsy (TLE). Here, we investigated whether specific morphological alterations of the GABAergic system can be related to the onset of spontaneous recurrent seizures (SRS) in the rat lithium-pilocarpine model of TLE. Immunohistochemical staining for markers of interneurons and their projections, including parvalbumin (PV), calretinin (CR), calbindin (CB), glutamic acid decarboxylase (GAD), and type 1 GABA transporter (GAT1), was performed in brain sections of rats treated with lithium-pilocarpine and sacrificed after 24 h, during the silent phase (6 and 12 days), or after the onset of SRS (10-18 days after treatment). Semiquantitative analysis revealed a selective loss of interneurons in the stratum oriens of CA1, associated with a reduction of GAT1 staining in the stratum radiatum and stratum oriens. In contrast, interneurons in CA3 were largely preserved, although GAT1 staining was also reduced. These changes occurred within 6 days after treatment and were therefore insufficient to cause SRS. In the dentate gyrus, extensive cell loss occurred in the hilus. The pericellular innervation of granule cells by PV-positive axons was markedly reduced, although the loss of PV-interneurons was only partial. Most strikingly, the density of GABAergic axons, positive for both GAD and GAT1, was dramatically increased in the inner molecular layer. This change emerged during the silent period, but was most marked in animals with SRS. Finally, supernumerary CB-positive neurons were detected in the hilus, selectively in rats with SRS. These findings suggest that alterations of GABAergic circuits occur early after lithium-pilocarpine-induced status epilepticus and contribute to epileptogenesis. In particular, the reorganization of GABAergic axons in the dentate gyrus might contribute to synchronize hyperexcitability induced by the interneuron loss during the silent period, leading to the onset of chronic seizures.
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Affiliation(s)
- V André
- INSERM U398, Université Louis Pasteur, Strasbourg, France
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André V, Ferrandon A, Marescaux C, Nehlig A. Vigabatrin protects against hippocampal damage but is not antiepileptogenic in the lithium-pilocarpine model of temporal lobe epilepsy. Epilepsy Res 2001; 47:99-117. [PMID: 11673025 DOI: 10.1016/s0920-1211(01)00299-6] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In temporal lobe epilepsy (TLE), the nature of the structures involved in the development of the epileptogenic circuit is still not clearly identified. In the lithium-pilocarpine model, neuronal damage occurs both in the structures belonging to the circuit of initiation and maintenance of the seizures (forebrain limbic system) as well as in the propagation areas (cortex and thalamus) and in the circuit of remote control of seizures (substantia nigra pars reticulata). In order to determine whether protection of some brain areas could prevent the epileptogenesis induced by status epilepticus (SE) and to identify the cerebral structures involved in the genesis of TLE, we studied the effects of the chronic exposure to Vigabatrin (gamma-vinyl-GABA, GVG) on neuronal damage and epileptogenesis induced by lithium-pilocarpine SE. The animals were subjected to SE and GVG treatment (250 mg/kg) was initiated at 10 min after pilocarpine injection and maintained daily for 45 days. These pilo-GVG rats were compared with rats subjected to SE followed by a daily saline treatment (pilo-saline) and to control rats not subjected to SE (saline-saline). GVG treatment induced a marked, almost total neuroprotection in CA3, an efficient protection in CA1 and a moderate one in the hilus of the dentate gyrus while damage in the entorhinal cortex was slightly worsened by the treatment. All pilo-GVG and pilo-saline rats became epileptic after the same latency. Glutamic acid decarboxylase (GAD67) immunoreactivity was restored in pilo-GVG rats compared with pilo-saline rats in all areas of the hippocampus, while it was increased over control levels in the optical layer of the superior colliculus and the substantia nigra pars reticulata. Thus, the present data indicate that neuroprotection of principal cells in the Ammon's horn of the hippocampus is not sufficient to prevent epileptogenesis, suggesting that the hilus and extra-hippocampal structures, that were not protected in this study, may play a role in the genesis of spontaneous recurrent seizures in this model. Furthermore, the study performed in non-epileptic rats indicates that chronic treatment with a GABAmimetic drug upregulates the expression of the protein GAD67 in specific areas of the brain, independently from the seizures.
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Affiliation(s)
- V André
- INSERM U398, Faculty of Medicine, Université Louis Pasteur, 11, rue Humann, 67085, Strasbourg, Cedex, France
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André V, Ferrandon A, Marescaux C, Nehlig A. The lesional and epileptogenic consequences of lithium-pilocarpine-induced status epilepticus are affected by previous exposure to isolated seizures: effects of amygdala kindling and maximal electroshocks. Neuroscience 2001; 99:469-81. [PMID: 11029539 DOI: 10.1016/s0306-4522(00)00209-8] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
In temporal lobe epilepsy, the occurrence of seizures seems to correlate with the presence of lesions underlying the establishment of a hyperexcitable circuit. However, in the lithium-pilocarpine model of epilepsy, neuronal damage occurs both in the structures belonging to the circuit of initiation and maintenance of the seizures (forebrain limbic system) as in the propagation areas (cortex and thalamus) and in the circuit of remote control of seizures (substantia nigra pars reticulata). To determine whether or not we could protect the brain from lesions and epileptogenesis induced by status epilepticus and identify cerebral structures involved in the genesis of epilepsy, we studied the effects of the chronic exposure to non-deleterious seizures, either focalized with secondary generalization (amygdala kindling, kindled-pilocarpine rats), or primary generalized (ear-clip electroshocks, electroshock-pilocarpine rats) on neuronal damage and epileptogenesis induced by lithium-pilocarpine status epilepticus. These animals were compared to rats subjected to status epilepticus but not pretreated with seizures (sham-kindled-pilocarpine or sham-electroshock-pilocarpine rats). Compared to sham-pilocarpine rats, neuronal damage was prevented in the limbic system of the kindled-pilocarpine rats, except in the hilus of the dentate gyrus and the entorhinal cortex, while it was enhanced in rats pretreated with electroshocks, mainly in the entorhinal and perirhinal cortices. Most sham-kindled- and sham-electroshock-pilocarpine rats (92-100%) developed recurrent seizures after a silent period of 40-54days. Likewise, all kindled-pilocarpine rats developed spontaneous seizures after the same latency as their sham controls, while only two of 10 electroshock-pilocarpine rats became epileptic after a delay of 106-151days. The present data show that the apparent antiepileptic properties of electroshocks correlate with extensive damage in midbrain cortical regions, which may prevent the propagation of seizures from the hippocampus and inhibit their motor expression. Conversely, the extensive neuroprotection of the limbic system but not the hilus and entorhinal cortex provided by amygdala kindling does not prevent epileptogenesis. Thus, the hilus, the entorhinal and/or perirhinal cortex may be key structure(s) for the establishment of epilepsy.
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Affiliation(s)
- V André
- INSERM U398, Faculté de Médecine, Université Louis Pasteur, 67085 Cedex, Strasbourg, France
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