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Varnier R, Toullec C, Philonenko S, Dupré A, Artru P, Hafliger E, Drouillard A, Torregrosa C, Pernot S, McLellan P, Lecomte T, Moulin V, Lécaille C, Touchefeu Y, Locher C, Taieb J, Coutzac C. Triplet chemotherapy with or without bevacizumab as first line treatment for metastatic colorectal cancer: An AGEO multicenter real-world study. Dig Liver Dis 2024:S1590-8658(24)00270-6. [PMID: 38403514 DOI: 10.1016/j.dld.2024.02.009] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Revised: 02/03/2024] [Accepted: 02/11/2024] [Indexed: 02/27/2024]
Abstract
BACKGROUND Prior trials validated triplet chemotherapy (Tri-CT) with bevacizumab as first line treatment for metastatic colorectal cancer (mCRC) but real-world data are scarce and practices remain heterogeneous. AIMS To evaluate Tri-CT +/- bevacizumab efficacy and safety, and to identify factors influencing treatment decisions. METHODS The COLOTRIP retrospective study enrolled mCRC patients treated from 2014 to 2019 in 14 French centers. RESULTS Of 299 patients (81% PS 0-1, 58% RAS-mutated and 19% BRAF-mutated), 51% received Tri-CT and 49% Tri-CT + bevacizumab. Metastatic disease was classified as resectable (6.5%), potentially resectable (40%), and unresectable (54%). Bevacizumab use was associated with primary tumor location, mutational status and number of metastases. Median overall survival was 33.5 months in the Tri-CT group and 23.9 months in the Tri-CT + bevacizumab group, with median progression-free survival being 14.5 and 11.4 months. After adjusting for initial characteristics, no difference in survival was noted. Around 30% of patients experienced grade ≥3 adverse events. CONCLUSIONS This study highlights several factors influencing Tri-CT use +/- bevacizumab decision and confirms the real-world good oncological outcomes and tolerability of these regimens in mCRC patients. Our results suggest that Tri-CT alone may by an appropriate option for specific subgroups of patients.
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Affiliation(s)
- R Varnier
- Department of Medical Oncology, Centre Léon Bérard, Lyon, France; Research on Healthcare Performance (RESHAPE, Inserm U1290), Université Claude Bernard Lyon 1, Lyon, France
| | - C Toullec
- Department of Digestive Oncology, Institut du Cancer Avignon-Provence, Avignon, France
| | - S Philonenko
- Department of Gastroenterology and Digestive Oncology, Hôpital Pitié Salpêtrière, Paris, France
| | - A Dupré
- Department of Surgery, Centre Léon Bérard, Lyon, France
| | - P Artru
- Department of Gastroenterology and Digestive Oncology, Hôpital Privé Jean Mermoz, Lyon, France
| | - E Hafliger
- Department of Gastroenterology and Digestive Oncology, Hôpital Privé Jean Mermoz, Lyon, France
| | - A Drouillard
- Department of Hepato-Gastroenterology and Digestive Oncology, Centre Hospitalier Universitaire de Dijon, Dijon, France
| | - C Torregrosa
- Department of Medical Oncology, Institut Curie, Paris, France
| | - S Pernot
- Department of Digestive Oncology, Institut Bergonié, Bordeaux, France
| | - P McLellan
- Department of Hepato-Gastroenterology and Digestive Oncology, Hôpital Saint-Louis, Paris, France
| | - T Lecomte
- Department of Hepato-Gastroenterology and Digestive Oncology, Centre Hospitalier Universitaire de Tours, Tours, France
| | - V Moulin
- Department of Hepato-Gastroenterology and Digestive Oncology, Centre Hospitalier de La Rochelle, La Rochelle, France
| | - C Lécaille
- Department of Hepato-Gastroenterology and Digestive Oncology, Polyclinique Bordeaux Nord Aquitaine, Bordeaux, France
| | - Y Touchefeu
- Department of Hepato-Gastroenterology and Digestive Oncology, Centre Hospitalier Universitaire de Nantes, Nantes, France
| | - C Locher
- Department of Hepato-Gastroenterology, Centre Hospitalier de Meaux, Meaux, France
| | - J Taieb
- Department of Gastroenterology and Digestive Oncology, Georges Pompidou European Hospital, AP-HP, Paris-Cité University, SIRIC CARPEM Comprehensive Cancer Center, Paris, France
| | - C Coutzac
- Department of Medical Oncology, Centre Léon Bérard, Lyon, France; Association des Gastro-Entérologues Oncologues (AGEO), France.
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Sánchez-Castro MA, Vukasinovic N, Passafaro TL, Salmon SA, Asper DJ, Moulin V, Nkrumah JD. Effects of a mastitis J5 bacterin vaccination on the productive performance of dairy cows: An observational study using propensity score matching techniques. J Dairy Sci 2023; 106:7177-7190. [PMID: 37210353 DOI: 10.3168/jds.2022-23166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Accepted: 04/18/2023] [Indexed: 05/22/2023]
Abstract
Inferring causal effects between variables when utilizing observational data is challenging due to confounding factors not controlled through a randomized experiment. Propensity score matching can decrease confounding in observational studies and offers insights about potential causal effects of prophylactic management interventions such as vaccinations. The objective of this study was to determine potential causality and impact of vaccination with an Escherichia coli J5 bacterin on the productive performance of dairy cows applying propensity score matching techniques to farm-recorded (e.g., observational) data. Traits of interest included 305-d milk yield (MY305), 305-d fat yield (FY305), 305-d protein yield (PY305), and somatic cell score (SCS). Records from 6,418 lactations generated by 5,121 animals were available for the analysis. Vaccination status of each animal was obtained from producer-recorded information. Confounding variables considered were herd-year-season groups (56 levels), parity (5 levels: 1, 2, 3, 4, and ≥5), and genetic quartile groups (4 levels: top 25% through bottom 25%) derived from genetic predictions for MY305, FY305, PY305, and SCS, as well as for the genetic susceptibility to mastitis. A logistic regression model was applied to estimate the propensity score (PS) for each cow. Subsequently, PS values were used to form pairs of animals (1 vaccinated with 1 unvaccinated control), depending on their PS similarities (difference in PS values of cows within a match required to be <20% of 1 standard deviation of the logit of PS). After the matching process, 2,091 pairs of animals (4,182 records) remained available to infer the causal effects of vaccinating dairy cows with the E. coli J5 bacterin. Causal effects estimation was performed using 2 approaches: simple matching and a bias-corrected matching. According to the PS methodology, causal effects of vaccinating dairy cows with a J5 bacterin on their productive performance were identified for MY305. The simple matched estimator suggested that vaccinated cows produced 163.89 kg more milk over an entire lactation when compared with nonvaccinated counterparts, whereas the bias-corrected estimator suggested that such increment in milk production was of 150.48 kg. Conversely, no causal effects of immunizing dairy cows with a J5 bacterin were identified for FY305, PY305, or SCS. In conclusion, the utilization of PS matching techniques applied to farm-recorded data was feasible and allowed us to identify that vaccination with an E. coli J5 bacterin relates to an overall milk production increment without compromising milk quality.
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Attiogbe E, Larochelle S, Mainzer C, Closs B, Gilbert C, Moulin V. 761 Contribution of resident immune cells in a human autologous 3D skin model. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.05.774] [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: 10/17/2022]
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Varnier R, Toullec C, Fonnesu M, Philonenko S, Artru P, Hafliger E, Drouillard A, Torregrosa C, Pernot S, McLellan P, Lecomte T, Moulin V, Lecaille C, Touchefeu Y, Locher C, Turpin A, Taieb J, Coutzac C. 421P FOLFIRINOX with or without targeted therapy as first line for metastatic colorectal cancer: An AGEO multicenter real-world study. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Kelly C, Wallace D, Moulin V, Germain L, Zuccaro J, Galdyn I, Fish JS. Surviving an Extensive Burn Injury Using Advanced Skin Replacement Technologies. J Burn Care Res 2021; 42:1288-1291. [PMID: 34343315 DOI: 10.1093/jbcr/irab146] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
There have been significant improvements in the technology available for treating extensive burns in the past decade. This case presents two unique, skin replacement technologies that were used to treat an 86% surface area flame burn in a pediatric patient. A temporary dermal replacement, known as "Novosorb™ Biodegradable Temporizing Matrix" was first used to stabilize the burn injury and remained in place for approximately three months. Given the large burn size and lack of available donor skin for grafting, a permanent skin replacement product known as "Self-Assembled Skin Substitute (SASS)" was then utilized to cover the burns. SASS is a novel technology that was developed to replace skin as an autologous skin graft and is currently available in Canada through a clinical trial for major burns. Ultimately, the concurrent use of these two technologies allowed for the unprecedented survival of a child following an extensive and life-threatening burn injury.
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Affiliation(s)
- Charis Kelly
- Division of Plastic and Reconstructive Surgery, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - David Wallace
- Division of Plastic and Reconstructive Surgery, The Hospital for Sick Children, Toronto, Ontario, Canada.,Division of Plastic, Reconstructive, and Aesthetic Surgery, University of Toronto Faculty of Medicine, Toronto, Ontario, Canada
| | - Veronique Moulin
- CHU of Québec-Laval University Research Center and Center of Research in Experimental Organogenesis of Laval University/LOEX, Québec, Canada
| | - Lucie Germain
- CHU of Québec-Laval University Research Center and Center of Research in Experimental Organogenesis of Laval University/LOEX, Québec, Canada
| | - Jennifer Zuccaro
- Division of Plastic and Reconstructive Surgery, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Izabela Galdyn
- Division of Plastic and Reconstructive Surgery, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Joel S Fish
- Division of Plastic and Reconstructive Surgery, The Hospital for Sick Children, Toronto, Ontario, Canada.,Division of Plastic, Reconstructive, and Aesthetic Surgery, University of Toronto Faculty of Medicine, Toronto, Ontario, Canada
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Hardham JM, Krug P, Pacheco JM, Thompson J, Dominowski P, Moulin V, Gay CG, Rodriguez LL, Rieder E. Novel Foot-and-Mouth Disease Vaccine Platform: Formulations for Safe and DIVA-Compatible FMD Vaccines With Improved Potency. Front Vet Sci 2020; 7:554305. [PMID: 33088833 PMCID: PMC7544895 DOI: 10.3389/fvets.2020.554305] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 08/13/2020] [Indexed: 11/13/2022] Open
Abstract
Inactivated, wild-type foot-and-mouth disease virus (FMDV) vaccines are currently used to control FMD around the world. These traditional FMD vaccines are produced using large quantities of infectious, virulent, wild-type FMD viruses, with the associated risk of virus escape from manufacturing facilities or incomplete inactivation during the vaccine formulation process. While higher quality vaccines produced from wild-type FMDV are processed to reduce non-structural antigens, there is still a risk that small amounts of non-structural proteins may be present in the final product. A novel, antigenically marked FMD-LL3B3D vaccine platform under development by Zoetis, Inc. and the USDA-ARS, consists of a highly attenuated virus platform containing negative antigenic markers in the conserved non-structural proteins 3Dpol and 3B that render resultant vaccines fully DIVA compatible. This vaccine platform allows for the easy exchange of capsid coding sequences to create serotype-specific vaccines. Here we demonstrate the efficacy of the inactivated FMD-LL3B3D-A24 Cruzeiro vaccine in cattle against wild-type challenge with A24 Cruzerio. A proprietary adjuvant system was used to formulate the vaccines that conferred effective protection at low doses while maintaining the DIVA compatibility. In contrast to wild-type FMDV, the recombinant FMD-LL3B3D mutant viruses have been shown to induce no clinical signs of FMD and no shedding of virus in cattle or pigs when inoculated as a live virus. The FMD-LL3B3D vaccine platform, currently undergoing development in the US, provides opportunities for safer vaccine production with full DIVA compatibility in support of global FMDV control and eradication initiatives.
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Affiliation(s)
| | - Peter Krug
- United States Department of Agriculture (USDA) Plum Island Animal Disease Center, Agricultural Research Services, USDA, Greenport, NY, United States
| | - Juan M Pacheco
- United States Department of Agriculture (USDA) Plum Island Animal Disease Center, Agricultural Research Services, USDA, Greenport, NY, United States
| | | | | | | | - Cyril G Gay
- United States Department of Agriculture (USDA) Office of National Programs, Agricultural Research Services, Beltsville, MD, United States
| | - Luis L Rodriguez
- United States Department of Agriculture (USDA) Plum Island Animal Disease Center, Agricultural Research Services, USDA, Greenport, NY, United States
| | - Elizabeth Rieder
- United States Department of Agriculture (USDA) Plum Island Animal Disease Center, Agricultural Research Services, USDA, Greenport, NY, United States
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Chaib Y, Larochelle S, Mainzer C, Closs B, Gilbert C, Moulin V. 591 A New 3D Skin Model Containing Autologous Immune Cells Reconstructed by Tissue Engineering. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.07.595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Vaillancourt-Audet M, Rochette P, Blais M, Moulin V, Auger F. 775 Development of a model to study the influence of ultraviolet radiation (UVs) on cell migration of primary melanoma. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.03.851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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9
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Chaib Y, Larochelle S, Mainzer C, Closs B, Gilbert C, Moulin V. 902 A new 3D immunocompetent skin model reconstructed by tissue engineering. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.03.978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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10
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Moulin V, Alameda L, Baumann PS, Gholamrezaee MM, Palix J, Gasser J, Conus P. [Three clinical risk profiles of violent behavior in a cohort of early psychosis patients]. Encephale 2018; 45:214-220. [PMID: 30446287 DOI: 10.1016/j.encep.2018.08.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 08/21/2018] [Accepted: 08/26/2018] [Indexed: 10/27/2022]
Abstract
OBJECTIVE This study aims to determine whether it is possible to identify clinical profiles at risk of violent behaviors (VB) in the early phase of psychotic disorders, on the basis of the main dynamic psychopathological risk factors and describe characteristics of the groups with highest levels of violent behaviors. METHOD A total of 265 patients, aged 18 to 35, treated at the Treatment and early Intervention in Psychosis Program (TIPP-Lausanne), a specialized early psychosis program, were included in this study. We conducted a latent-class analysis and a discriminative analysis on the basis of the main dynamic VB risk factors: substance use disorder, impulsivity, positive symptoms, insight, aggression, hostility, anger, emotional instability and adherence to treatment. These factors were evaluated by specialized scales and on the basis of the Positive and Negative Syndrome Scale (PANSS). VB were restricted to physical aggression against people, defined as "serious violence". They were assessed on the basis of a questionnaire listing violent offenses (Swiss Criminal Code) and VB such as assault and battery, information through the forensic psychiatric services and on the basis of the Staff Observation Aggression Scale (SOAS-R scale) during inpatient treatment phase. RESULTS Four heterogeneous subgroups were identified with respect to the studied clinical characteristics, including two groups with high rates of VB. The first group, comprising 46% of patients with VB, is distinguished by the prevalence of a range of dimensions related to hostility, impulsivity and emotional instability, associated with high levels of substance abuse and positive symptoms. These clinical dimensions are very significant at the statistical level, since they explain 70% of the construction of subgroups (discriminant analysis). The second group with 37% of patients with VB, is characterized by a lack of insight, lack of adherence to treatment and substance use. These two clinical profiles could increase the impairment of cognitive, functional and relational abilities and contribute to the development of VB in this early phase of psychosis. The third subgroup, with a violent behaviors rate of 28.6%, is distinguished by its high proportion of diagnoses of substance abuse (100%) and women (54%). A last subgroup of patients, the largest quantitatively, has a low proportion of VB (15%) and the lowest levels on the studied factors, suggesting that the majority of patients with this profile commit few VB. CONCLUSION Our results show that it is possible to identify groups at risk of violent behaviors during the early phase of psychosis on the basis of clinical characteristics that may evolve and therefore be the focus of preventive care. These results highlight the need to target substance use, impulsivity and lack of insight at follow-up in order to prevent VB.
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Affiliation(s)
- V Moulin
- Unité de recherche en psychiatrie et psychologie légales, institut de psychiatrie légale, département de psychiatrie du centre hospitalier universitaire Vaudois (CHUV), site de Cery, bâtiment Les Cèdres, 1008 Prilly-Lausanne, Suisse.
| | - L Alameda
- Service de psychiatrie générale, centre de neuroscience psychiatrique, département de psychiatrie du centre hospitalier universitaire Vaudois (CHUV), Lausanne, Suisse; Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, UK
| | - P S Baumann
- Service de psychiatrie générale, département de psychiatrie du centre hospitalier universitaire Vaudois (CHUV), Lausanne, Suisse
| | - M M Gholamrezaee
- Centre d'épidémiologie psychiatrique et psychopathologie, département de psychiatrie du centre hospitalier universitaire Vaudois (CHUV), Lausanne, Suisse
| | - J Palix
- Unité de recherche en psychiatrie et psychologie légales, institut de psychiatrie légale, département de psychiatrie du centre hospitalier universitaire Vaudois (CHUV), site de Cery, bâtiment Les Cèdres, 1008 Prilly-Lausanne, Suisse
| | - J Gasser
- Institut de psychiatrie légale, département de psychiatrie du centre hospitalier universitaire Vaudois (CHUV), Lausanne, Suisse
| | - P Conus
- Service de psychiatrie générale, département de psychiatrie du centre hospitalier universitaire Vaudois (CHUV), Lausanne, Suisse
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Tougeron D, Cohen R, Sueur B, Sefrioui D, Gentilhomme L, Lecomte T, Aparicio T, Des Guetz G, Artru P, de la Fouchardiere C, Moulin V, Hautefeuille V, Coriat R, Touchefeu Y, Lecaille C, Goujon G, Ferru A, Taieb J, André T, Zaanan A. A large retrospective multicenter study evaluating prognosis and chemosensitivity of metastatic colorectal cancer with microsatellite instability. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx393.059] [Citation(s) in RCA: 6] [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: 11/13/2022] Open
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Moulin V, Abbiati M, Azzola A, Palix J, Gasser J. [Risk assessment in forensic psychiatric reports: what kind assessment instrument? What indicator? What practical?]. Rev Med Suisse 2015; 11:1710-1714. [PMID: 26591082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Here we present results of studies conducted by the Research Unit of Legal Psychiatry and Psychology of Lausanne about risk assessment and protective factors in the evaluation of violence recidivism. It aims to help experts in considering the relevance and use of tools at their disposal. Particular attention is given to the significance of protective factors and impulsive dimensions, as to the inter-raters process that leads to the final deliberations.
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Kortekaas J, Oreshkova N, van Keulen L, Kant J, Bosch B, Bouloy M, Moulin V, Goovaerts D, Moormann R. Comparative efficacy of two next-generation Rift Valley fever vaccines. Vaccine 2014; 32:4901-8. [DOI: 10.1016/j.vaccine.2014.07.037] [Citation(s) in RCA: 21] [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: 05/06/2014] [Revised: 06/11/2014] [Accepted: 07/09/2014] [Indexed: 12/17/2022]
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Fourest B, Perrone J, Baglan N, Lindecker C, Moulin V. Surface Properties of Two Thorium Phosphate Compounds: Th4(P04)4P207 and Th3(P04)4; Comparison and Consequences for the Retention of Actinides. RADIOCHIM ACTA 2013. [DOI: 10.1524/ract.1998.82.special-issue.299] [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: 11/24/2022]
Affiliation(s)
- B. Fourest
- Institut de Physique Nucleaire, F-91406 Orsay cedex, France
| | - J. Perrone
- Institut de Physique Nucleaire, F-91406 Orsay cedex, France
| | - N. Baglan
- Institut de Protection et de sürete Nucleaire, DPHD/SDOS, F-92265 Fontenay-aux-Roses cedex, France
| | - C. Lindecker
- Institut de Physique Nucleaire, F-91406 Orsay cedex, France
| | - V. Moulin
- CEA/DCC/DESD/SESD, F-91191 Gif-sur-Yvette cedex, France
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Garcia K, Boust D, Moulin V, Douville E, Fourest B, Guillaumont R. Multiparametric Investigation of the Reactions of Plutonium under Estuarine Conditions. RADIOCHIM ACTA 2013. [DOI: 10.1524/ract.1996.74.special-issue.165] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- K. Garcia
- Laboratoire de Radioécologie Marine IPSN BP 10, 50130 Octeville, France
| | - D. Boust
- Laboratoire de Radioécologie Marine IPSN BP 10, 50130 Octeville, France
| | - V. Moulin
- CEA, DCC/DESD/SESD/Section de Geochimie, 92265 Fontenay-aux-Roses, France
| | - E. Douville
- Laboratoire de Radioécologie Marine IPSN BP 10, 50130 Octeville, France
| | - B. Fourest
- Groupe de Radiochimie, Institut de Physique Nucléaire, Université Paris XI, 91406 Orsay Cedex, France
| | - R. Guillaumont
- Groupe de Radiochimie, Institut de Physique Nucléaire, Université Paris XI, 91406 Orsay Cedex, France
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van der Sluijs MTW, Schroer-Joosten DPH, Fid-Fourkour A, Smit M, Vrijenhoek MP, Moulin V, de Smit AJ, Moormann RJM. Transplacental transmission of BTV-8 in sheep: BTV viraemia, antibody responses and vaccine efficacy in lambs infected in utero. Vaccine 2013; 31:3726-31. [PMID: 23746457 DOI: 10.1016/j.vaccine.2013.05.087] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [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: 03/01/2013] [Revised: 05/13/2013] [Accepted: 05/21/2013] [Indexed: 10/26/2022]
Abstract
Bluetongue virus (BTV) is an insect vector transmitted virus which causes an economically important disease in ruminants. BTV infection during pregnancy can result in infection of the foetus, which may lead to the birth of persistently infected or immunotolerant offspring. Since persistently infected animals continuously produce large amounts of virus they could be a source of infection for the insect vector. This could significantly influence the epidemiology of the virus and hence might require additional measures to control a BTV outbreak. Therefore, we investigated the potential of BTV-8 to induce persistent infection or immunotolerance in lambs in an experimental setting. Infection of eighteen 70-75 days pregnant ewes with wild type BTV-8 led to the birth of 25 out of 44 BTV RNA positive lambs (foetal infected, FI). All 23 FI lambs born alive also had anti BTV antibodies at birth; infectious virus could be recovered from 5 out of 25 FI lambs. Viral RNA loads decreased rapidly after birth; 19 out of 20 FI lambs that remained in the experiment until week 14 after birth, were RNA negative at that time. Since persistence of BTV-8 infection could not be demonstrated, we investigated whether foetal infection had an effect on protection against a field virus infection and on efficacy of vaccination. To this end, 5 FI lambs and 5 foetal non-infected (FNI) lambs were vaccinated with the inactivated Bovilis(®) BTV-8 vaccine, five months after birth. Three weeks after the vaccination, all lambs were infected with wild type BTV-8. The foetal infection did not interfere with vaccination efficacy. In contrast, foetal BTV-8 infection induced an immune response which afforded protection against BTV challenge comparable to the level of protection induced by vaccination.
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Affiliation(s)
- M T W van der Sluijs
- MSD Animal Health, Wim de Korverstraat 35, PO Box 31, 5830 AA Boxmeer, The Netherlands.
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Moulin V, Gasser J. [Benefits and limitations of risk assessment for criminal recidivism]. Rev Med Suisse 2012; 8:1775-1780. [PMID: 23097915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The legislatives evolutions imply an important recourse to the psychiatric expertise in order to evaluate the potential dangerousness of a subject. However, in spite of the development of techniques and tools for this evaluation, the dangerousness assessment of a subject is in practice extremely complex and discussed in the scientific literature. The evolution of the concept of dangerousness to the risk assessment involved a technicisation of this evaluation which should not make forget the limits of these tools and the need for restoring the subject, the meaning and the clinic in this evaluation.
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Affiliation(s)
- V Moulin
- Unité de recherche en psychiatrie et psychologie Iégales, Département de psychiatrie, Site de Cery, 1008 Prilly-Lausanne.
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Gubbins S, Hartemink NA, Wilson AJ, Moulin V, Vonk Noordegraaf CA, van der Sluijs MTW, de Smit AJ, Sumner T, Klinkenberg D. Scaling from challenge experiments to the field: Quantifying the impact of vaccination on the transmission of bluetongue virus serotype 8. Prev Vet Med 2012; 105:297-308. [PMID: 22425328 DOI: 10.1016/j.prevetmed.2012.02.016] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2011] [Revised: 01/25/2012] [Accepted: 02/19/2012] [Indexed: 11/18/2022]
Abstract
Bluetongue (BT) is an economically important disease of ruminants caused by bluetongue virus (BTV) and transmitted by Culicoides biting midges. The most practical and effective way to protect susceptible animals against BTV is by vaccination. Data from challenge studies in calves and sheep conducted by Intervet International b.v., in particular, presence of viral RNA in the blood of challenged animals, were used to estimate vaccine efficacy. The results of the challenge studies for calves indicated that vaccination is likely to reduce the basic reproduction number (R(0)) for BTV in cattle to below one (i.e. prevent major outbreaks within a holding) and that this reduction is robust to uncertainty in the model parameters. Sensitivity analysis showed that the whether or not vaccination is predicted to reduce R(0) to below one depended on the following assumptions: (i) whether "doubtful" results from the challenge studies are treated as negative or positive; (ii) whether or not the probability of transmission from host to vector is reduced by vaccination; and (iii) whether the extrinsic incubation period follows a realistic gamma distribution or the more commonly used exponential distribution. For sheep, all but one of the vaccinated animals were protected and, consequently, vaccination will consistently reduce R(0) in sheep to below one. Using a stochastic spatial model for the spread of BTV in Great Britain (GB), vaccination was predicted to reduce both the incidence of disease and spatial spread in simulated BTV outbreaks in GB, in both reactive vaccination strategies and when an incursion occurred into a previously vaccinated population.
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Affiliation(s)
- S Gubbins
- Institute for Animal Health, Pirbright Laboratory, Ash Road, Pirbright, Surrey GU24 0NF, UK.
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Moulin V, Morgan ME, Eleveld-Trancikova D, Haanen JBAG, Wielders E, Looman MWG, Janssen RAJ, Figdor CG, Jansen BJH, Adema GJ. Targeting dendritic cells with antigen via dendritic cell-associated promoters. Cancer Gene Ther 2012; 19:303-11. [PMID: 22361816 DOI: 10.1038/cgt.2012.2] [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] [Indexed: 01/08/2023]
Abstract
The induction of tumor-specific immune responses is largely dependent on the ability of dendritic cells (DCs) to present tumor-associated antigens to T lymphocytes. Therefore, we investigated the use of DC-associated promoter-driven genetic vaccines to specifically target DC in vivo. Restricted expression of vaccine-encoding genes in DC should enhance specificity and improves their safety for clinical applications. Hereto, 3-5 kb upstream sequences of the murine genes encoding CD11c, DC-SIGN, DC-STAMP and Langerin were isolated, characterized and subcloned into enhanced green fluorescent protein (EGFP) reporter constructs. Upon electroporation, EGFP was expressed in DC cell lines, but not in other cell lines, confirming DC-restricted promoter activity. When these promoters were cloned into a construct upstream of the gene for ovalbumin (OVA), it appeared that DC-STAMP promoter-driven expression of OVA (pDCSTAMP/OVA) in DC yielded the most efficient OVA-specific CD4+ and CD8+ T-cell responses in vitro. Administration of pDC-STAMP/OVA in vivo, using the tattoo gun vaccination system, evoked specific immune responses as evidenced in a mouse tumor model. Adoptively transferred pDC-STAMP/OVA-transfected DCs induced strong CD8+ T-cell proliferation in vivo. These experiments demonstrate that our DC-directed promoter constructs are potential tools to restrict antigen expression in DC and could be implemented to modulate DC function by the introduction of relevant proteins.
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Affiliation(s)
- V Moulin
- Department of Tumor Immunology, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
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Moulin V, Sévin AS, Senon JL. Conflictualisation psychique des positions professionnelles des surveillants en établissement pénitentiaire. PRAT PSYCHOL 2011. [DOI: 10.1016/j.prps.2009.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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van der Sluijs MTW, Schroer-Joosten DPH, Fid-Fourkour A, Vrijenhoek MP, Debyser I, Gregg DA, Dufe DM, Moulin V, Moormann RJM, de Smit AJ. Effect of vaccination with an inactivated vaccine on transplacental transmission of BTV-8 in mid term pregnant ewes and heifers. Vaccine 2011; 30:647-55. [PMID: 22107846 DOI: 10.1016/j.vaccine.2011.10.106] [Citation(s) in RCA: 15] [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: 07/29/2011] [Revised: 10/17/2011] [Accepted: 10/30/2011] [Indexed: 11/16/2022]
Abstract
The effect of vaccination with a commercial inactivated Bluetongue virus serotype 8 (BTV-8) vaccine on the ability of BTV-8 to cross the ruminant placenta was investigated in two experiments. Ten pregnant ewes (Experiment 1) or heifers (Experiment 2) were vaccinated according to the manufacturer's instructions. Three weeks after the completion of the vaccination schedule, all vaccinated animals were infected with BTV-8 together with ten non-vaccinated pregnant animals that served as challenged controls. Four additional pregnant animals received a mock challenge at the same time point. Three weeks after the challenge, the foetuses were collected. In the sheep experiment, the lambs of the vaccinated ewes and the mock infected ewes were negative in the virus isolation, whereas BTV-8 could be isolated from 11/23 lambs of 6/10 ewes in the BTV-8 challenged control group. The incidence and severity of BTV associated lesions, such as haemorrhages, meningitis/encephalitis and necrosis in the placentomes was significantly higher in the BTV-8 challenged control group. The rate of transplacental transmission was less in the cattle experiment: BTV-8 could be detected in 2/10 calves in the BTV-8 challenged control group. All other calves were negative. Vaccination clearly reduced transplacental transmission of BTV-8 in the sheep experiment, whereas in the cattle experiment, the incidence of transmission was too low to demonstrate a significant reduction of transmission by vaccination. However, the vaccine very effectively blocked viraemia, which suggests that the vaccine might prevent transmission in cattle as well. Transplacental transmission of BTV has serious economical consequences, due to the loss of progeny to the livestock industry. Vaccination can be an important aid in the reduction of these economic losses.
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Affiliation(s)
- M T W van der Sluijs
- MSD Animal Health, Wim de Korverstraat 35, PO Box 31, 5830 AA, Boxmeer, The Netherlands.
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22
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Labonne N, Moulin V, Stammose D. Actinide Sorption onto Silica in the Presence of Humic Substances: Proposal of Retentionmechanisms. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-257-307] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTThe experimental investigation and modelling of radionuclides sorption processes is an essential part of safety analyses of an underground repository of radioactive wastes in geological formations. Physico—chemical phenomena at oxide/solution interfaces have been studied in the case of the system constituted by amorphous silica and americium (III) in the presence of humic substances as organic complexing agents. The retention behaviour of Am(III) onto silica appears dependent on pH, ionic strength and in particular humic concentration. At a ionic strength of 0.1 M, the presence of low concentration of humic acids (1 mg/l) enhances the Am(III) retention in the pH range 3-5.5, whereas at higher pH, its uptake is largely decreased. At lower ionic strength (0.001 M), Am(III) retention on silica is highly lowered, in the pH range 3-7 in the presence of humic acids. Reversibility experiments show the desorption of americium in the absence of humic substances, and also the desorption of the humics on the silica with respect of the pH. The surface complexation model has been applied to our results in the different systems and apparent surface complexation constants have been determined.
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Bréard E, Belbis G, Hamers C, Moulin V, Lilin T, Moreau F, Millemann Y, Montange C, Sailleau C, Durand B, Desprat A, Viarouge C, Hoffmann B, de Smit H, Goutebroze S, Hudelet P, Zientara S. Evaluation of humoral response and protective efficacy of two inactivated vaccines against bluetongue virus after vaccination of goats. Vaccine 2011; 29:2495-502. [PMID: 21256877 DOI: 10.1016/j.vaccine.2010.12.105] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2010] [Revised: 12/14/2010] [Accepted: 12/16/2010] [Indexed: 11/17/2022]
Abstract
Bluetongue serotype 8 has become a major animal health issue in the European Union and the European member States have agreed on a vaccination strategy, which involves only inactivated vaccines. In this study, the efficacy of two inactivated vaccines against bluetongue virus serotype 8 (BTV-8) used in Europe since 2008, BTVPUR ALSAP(®) 8 (MERIAL) and BOVILIS(®) BTV8 (Intervet/SP-AH), was evaluated in goats immunized and challenged with BTV-8 field isolates under experimental conditions. Serological, virological and clinical examinations were conducted before and after challenge. Three groups of 10 goats each (groups A, B and C) were randomly constituted and 2 groups (A and C) were subcutaneously vaccinated twice with one dose of the two commercial vaccines BTVPUR ALSAP 8 (group A) or BOVILIS BTV8 (group C) respectively. Animals of the groups A, C and B (B: controls) were challenged with a virulent inoculum containing BTV-8. During the experiment, it was found out that the BTV-8 challenge inoculum was contaminated with another BTV serotype. However, results demonstrated that vaccination of goats with two injections of BTVPUR ALSAP 8 or BOVILIS BTV8 provided a significant clinical protection against a BTV-8 challenge and completely prevented BTV-8 viraemia in all vaccinated animals. Qualitative data showed no difference in the kinetics and levels of the humoral response induced by these two inactivated vaccines.
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Affiliation(s)
- E Bréard
- ANSES, UMR Virology 1161, Laboratoire de Sante Animale, Maisons-Alfort, France.
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van der Sluijs M, Timmermans M, Moulin V, Noordegraaf CV, Vrijenhoek M, Debyser I, de Smit AJ, Moormann R. Transplacental transmission of Bluetongue virus serotype 8 in ewes in early and mid gestation. Vet Microbiol 2010; 149:113-25. [PMID: 21145670 DOI: 10.1016/j.vetmic.2010.11.002] [Citation(s) in RCA: 32] [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: 06/10/2010] [Revised: 10/29/2010] [Accepted: 11/01/2010] [Indexed: 11/16/2022]
Abstract
The ability of Bluetongue virus serotype 8 (BTV-8) originating from the 2006 European outbreak to cross the ovine placenta during early and mid gestation was investigated in two separate experiments. In the first experiment, 16 ewes were infected with BTV-8 at 70-75 days gestation. The foetuses were collected at 18-19 days after infection (dpi). BTV-8 could be isolated from at least two organs of 19 out of 40 lambs and from 11 out of 16 infected ewes. In the second experiment, 20 BTV-8 infected ewes in early gestation (day 40-45) were euthanized at 10 days (10 ewes) or 30 days (10 ewes) after infection. The presence of BTV could be demonstrated in two foetuses from two ewes at 10 dpi and in 4 foetuses from four ewes at 30 dpi. The main pathological findings in the foetuses in mid gestation were meningo-encephalitis and vacuolation of the cerebrum. In the foetuses early at gestation, haemorrhages in various foetal tissues and necrosis and haemorrhages in the placentomes were found. These experiments demonstrate for the first time the presence of infectious BTV in lamb foetuses at different stages of gestation, combined with a difference in transmission rate depending on the gestation stage. The high transmission rate found at mid term gestation (69%) makes our model very suitable for further research into the mechanisms of transplacental transmission and for research into the reduction of this route of transmission through vaccination.
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Affiliation(s)
- M van der Sluijs
- Intervet Schering Plough Animal Health, Wim de Körverstraat 35, PO Box 31, 5830 AA Boxmeer, The Netherlands.
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Zaanan A, Costes L, Gauthier M, Malka D, Locher C, Mitry E, Tougeron D, Lecomte T, Gornet JM, Sobhani I, Moulin V, Afchain P, Taïeb J, Bonnetain F, Aparicio T. Chemotherapy of advanced small-bowel adenocarcinoma: a multicenter AGEO study. Ann Oncol 2010; 21:1786-1793. [PMID: 20223786 DOI: 10.1093/annonc/mdq038] [Citation(s) in RCA: 101] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND Small-bowel adenocarcinoma (SBA) is a rare tumor of poor prognosis. Data on the efficacy of chemotherapy for advanced SBA are scarce. PATIENTS AND METHODS All patients with advanced SBA who received frontline chemotherapy from 1996 to 2008 were eligible for this retrospective multicenter study. RESULTS Ninety-three consecutive patients were included. In the entire population, the median progression-free survival (PFS) and overall survival (OS) times were 6.6 and 15.1 months, respectively. Median PFS times among patients treated with LV5FU2 (n = 10), FOLFOX (n = 48), FOLFIRI (n = 19) and LV5FU2-cisplatin (n = 16) were 7.7, 6.9, 6.0 and 4.8 months, respectively, while median OS times were 13.5, 17.8, 10.6 and 9.3 months, respectively. In multivariate analysis, World Health Organization performance status (PS) (P < 0.0001) and elevated serum levels of carcinoembryonic antigen (CEA) (P = 0.02) and carbohydrate antigen 19-9 (CA 19-9) (P = 0.03) were the only variables significantly associated with poor OS. In the subgroup of patients treated with platinum-based chemotherapy, multivariate analysis showed that LV5FU2-cisplatin was associated with poorer PFS (P < 0.0001) and OS (P = 0.02) compared with FOLFOX. CONCLUSIONS This is the largest study of chemotherapy in advanced SBA. Baseline PS and CEA and CA 19-9 levels were the main prognostic factors. FOLFOX seems to be the most effective platinum-based chemotherapy regimen.
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Affiliation(s)
- A Zaanan
- Department of Medical Oncology, Saint-Antoine Hospital, Assistance Publique Hôpitaux de Paris, University Paris VI
| | - L Costes
- Department of Medicine, Institut Gustave Roussy, University Paris Sud, Villejuif
| | - M Gauthier
- Biostatistics and Epidemiological Unit, Georges François Leclerc Center, Dijon
| | - D Malka
- Department of Medicine, Institut Gustave Roussy, University Paris Sud, Villejuif
| | - C Locher
- Department of Hepato-Gastroenterology, Meaux Hospital, Meaux
| | - E Mitry
- Department of Hepatogastroenterology and Digestive Oncology, Ambroise Paré Hospital, Assistance Publique Hôpitaux de Paris, Boulogne-Billancourt
| | - D Tougeron
- Department of Hepatogastroenterology, Charles Nicolle Hospital, Rouen
| | - T Lecomte
- Department of Hepatogastroenterology, Trousseau Hospital, University François Rabelais, Tours
| | - J-M Gornet
- Department of Hepatogastroenterology, Saint-Louis Hospital, Assistance Publique Hôpitaux de Paris, Paris
| | - I Sobhani
- Department of Hepatogastroenterology, Henri Mondor Hospital, Assistance Publique Hôpitaux de Paris, Créteil
| | - V Moulin
- Department of Medical Oncology, Louis Pasteur Hospital, Coudray
| | - P Afchain
- Department of Medical Oncology, Saint-Antoine Hospital, Assistance Publique Hôpitaux de Paris, University Paris VI
| | - J Taïeb
- Department of Hepatogastroenterology, Européen Georges Pompidou Hospital, Assistance Publique Hôpitaux de Paris, Paris
| | - F Bonnetain
- Biostatistics and Epidemiological Unit, Georges François Leclerc Center, Dijon
| | - T Aparicio
- Department of Gastroenterology, Avicenne Hospital, Assistance Publique Hôpitaux de Paris, University Paris XIII, Bobigny, France and AGEO (Association des Gastroente'rologues Oncologues/Gastroenterologists Oncologists Association).
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Affiliation(s)
| | | | - V. Moulin
- CEA-DCC-DESD, BP6, 92265 Fontenay-aux-Roses Cedex, France
| | - J.-C. Petit
- CEA-DCC-DESD, BP6, 92265 Fontenay-aux-Roses Cedex, France
| | - V. Rigato
- INFM-Laboratori Nazionali 35020 Legnaro, Italy
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Zaanan A, Costes L, Liegard M, Locher C, Bidault A, Mitry E, Gornet J, Tourgeron D, Mansourbakht T, Taieb J, Lecomte T, Moulin V, Maire F, Sobhani I, Afchain P, Malka D, Bonnetain F, Aparicio T. CO.32 Chimiothérapie des adénocarcinomes avancés de l’intestin grêle : résultats finaux de l’étude multicentrique AGEO. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/s0399-8320(09)72627-2] [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: 11/30/2022]
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Mayrand D, Larochelle S, Lopez-Valle C, Roy M, Moulin V. 120
Interaction Between Endothelial Cells and Myofibroblasts During Wound Healing. Wound Repair Regen 2008. [DOI: 10.1111/j.1067-1927.2005.130216x.x] [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: 11/27/2022]
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Bellemare J, Bergeron D, Roberge C, Lopez-Valle C, Roy M, Moulin V. 150
Influence of Epidermal Cells in Hypertrophic Scarring Pathology. Wound Repair Regen 2008. [DOI: 10.1111/j.1067-1927.2005.130216bb.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Eleveld-Trancikova D, Janssen RAJ, Hendriks IAM, Looman MWG, Moulin V, Jansen BJH, Jansen JH, Figdor CG, Adema GJ. The DC-derived protein DC-STAMP influences differentiation of myeloid cells. Leukemia 2007; 22:455-9. [PMID: 17713547 DOI: 10.1038/sj.leu.2404910] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [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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Aparicio T, Costes L, Moulin V, Locher C, Bidault A, Lecomte T, Mitry E, Taieb J, Landi B, Malka D. Efficacy of recent chemotherapy regimen in advanced small bowel carcinoma. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.15112] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
15112 Background: Small bowel carcinoma (SBC) is a rare tumour. Very few data concerning the chemotherapy efficacy are published. The overall survivals previously reported were 8 to 14 months. The aim of the study was to evaluate the efficacy of recent chemotherapy regimen in advanced SBC. Methods: All the consecutive patients treated recently by first line chemotherapy for advanced SBC were included retrospectively in a multicentric study. Clinical and radiological evaluations were performed every 2 or 3 months according to WHO criteria. Chemotherapy was stopped in case of progression, severe toxicity or patient willing. Results: Fifty seven patients (33 men, 24 women), median age 56 years [32–83] treated from 1994 to 2006 in 10 institutions were included. Primary tumours were: duodenum n=35 (61%), jejunum n=14 (25%) and ileum n=8 (14%). Three patients had Crohn disease and one HNPCC syndrome. The tumour were locally advanced in 6 patients (10%), or with metastasis in 51 (90%), synchronous n=35 or metachronous n=16. The mains metastasis sites were peritoneal carcinomatosis in 29, liver in 19 and nodes in 13 patients. Sixteen patients have had an initial R0 surgery and 8 had received, before inclusion, adjuvant chemotherapy. The regimens used in first line were: FOLFOX n=21 (37%), LV5FU2-cisplatine n=13 (23%), LV5FU2 n=12 (21%), FOLFIRI n=10 (17%). Twenty five (44%) patients have had grade 3 or 4 toxicity. A toxic death occurred after a cure of FOLFOX. Chemotherapy was stopped in relation to toxicity in 7 (12%) patients. A dose reduction was done in 15 (26%) patients for a total of 16% of the cures. Tumor was measurable in 42 (73%) pts. A partial response was observed in 13 patients (31%), stabilisation in 14 (33%) and progression in 15 (36%). Thirty six (63%) pts had a second line chemotherapy. Time to treatment failure was 6 [1–21] months in all patients and 7 [2–19], 7 [2–20], 5 [1–21] and 4 [1–10] months according to treatment by FOLFOX, LV5FU2, FOLFIRI or LV5FU2-cisplatine respectively. Overall survival was 11 months [1–36]. Overall survival according to the primary localization were: duodenum: 9 [1–34], jejunum: 18 [3–32], ileum: 15 [4- 36]. Conclusions: Advanced SBC have a bad prognosis. The chemotherapy regimen used in colon cancer did not reach the same efficacy in SBC. No significant financial relationships to disclose.
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Affiliation(s)
- T. Aparicio
- Hôpital Bichat, Paris, France; Institut Gustave Roussy, Villejuif, France; Hôpital Saint Antoine, Paris, France; Hôpital de Meaux, Meaux, France; Hôpital Kremlin Bicêtre, Kremlin Bicêtre, France; Hôpital Trousseau, Tours, France; Hôpital Ambroise Paré, Boulogne, France; Hôpital de la Pitié- Salpétrière, Paris, France; Hôpital Georges Pompidou, Paris, France
| | - L. Costes
- Hôpital Bichat, Paris, France; Institut Gustave Roussy, Villejuif, France; Hôpital Saint Antoine, Paris, France; Hôpital de Meaux, Meaux, France; Hôpital Kremlin Bicêtre, Kremlin Bicêtre, France; Hôpital Trousseau, Tours, France; Hôpital Ambroise Paré, Boulogne, France; Hôpital de la Pitié- Salpétrière, Paris, France; Hôpital Georges Pompidou, Paris, France
| | - V. Moulin
- Hôpital Bichat, Paris, France; Institut Gustave Roussy, Villejuif, France; Hôpital Saint Antoine, Paris, France; Hôpital de Meaux, Meaux, France; Hôpital Kremlin Bicêtre, Kremlin Bicêtre, France; Hôpital Trousseau, Tours, France; Hôpital Ambroise Paré, Boulogne, France; Hôpital de la Pitié- Salpétrière, Paris, France; Hôpital Georges Pompidou, Paris, France
| | - C. Locher
- Hôpital Bichat, Paris, France; Institut Gustave Roussy, Villejuif, France; Hôpital Saint Antoine, Paris, France; Hôpital de Meaux, Meaux, France; Hôpital Kremlin Bicêtre, Kremlin Bicêtre, France; Hôpital Trousseau, Tours, France; Hôpital Ambroise Paré, Boulogne, France; Hôpital de la Pitié- Salpétrière, Paris, France; Hôpital Georges Pompidou, Paris, France
| | - A. Bidault
- Hôpital Bichat, Paris, France; Institut Gustave Roussy, Villejuif, France; Hôpital Saint Antoine, Paris, France; Hôpital de Meaux, Meaux, France; Hôpital Kremlin Bicêtre, Kremlin Bicêtre, France; Hôpital Trousseau, Tours, France; Hôpital Ambroise Paré, Boulogne, France; Hôpital de la Pitié- Salpétrière, Paris, France; Hôpital Georges Pompidou, Paris, France
| | - T. Lecomte
- Hôpital Bichat, Paris, France; Institut Gustave Roussy, Villejuif, France; Hôpital Saint Antoine, Paris, France; Hôpital de Meaux, Meaux, France; Hôpital Kremlin Bicêtre, Kremlin Bicêtre, France; Hôpital Trousseau, Tours, France; Hôpital Ambroise Paré, Boulogne, France; Hôpital de la Pitié- Salpétrière, Paris, France; Hôpital Georges Pompidou, Paris, France
| | - E. Mitry
- Hôpital Bichat, Paris, France; Institut Gustave Roussy, Villejuif, France; Hôpital Saint Antoine, Paris, France; Hôpital de Meaux, Meaux, France; Hôpital Kremlin Bicêtre, Kremlin Bicêtre, France; Hôpital Trousseau, Tours, France; Hôpital Ambroise Paré, Boulogne, France; Hôpital de la Pitié- Salpétrière, Paris, France; Hôpital Georges Pompidou, Paris, France
| | - J. Taieb
- Hôpital Bichat, Paris, France; Institut Gustave Roussy, Villejuif, France; Hôpital Saint Antoine, Paris, France; Hôpital de Meaux, Meaux, France; Hôpital Kremlin Bicêtre, Kremlin Bicêtre, France; Hôpital Trousseau, Tours, France; Hôpital Ambroise Paré, Boulogne, France; Hôpital de la Pitié- Salpétrière, Paris, France; Hôpital Georges Pompidou, Paris, France
| | - B. Landi
- Hôpital Bichat, Paris, France; Institut Gustave Roussy, Villejuif, France; Hôpital Saint Antoine, Paris, France; Hôpital de Meaux, Meaux, France; Hôpital Kremlin Bicêtre, Kremlin Bicêtre, France; Hôpital Trousseau, Tours, France; Hôpital Ambroise Paré, Boulogne, France; Hôpital de la Pitié- Salpétrière, Paris, France; Hôpital Georges Pompidou, Paris, France
| | - D. Malka
- Hôpital Bichat, Paris, France; Institut Gustave Roussy, Villejuif, France; Hôpital Saint Antoine, Paris, France; Hôpital de Meaux, Meaux, France; Hôpital Kremlin Bicêtre, Kremlin Bicêtre, France; Hôpital Trousseau, Tours, France; Hôpital Ambroise Paré, Boulogne, France; Hôpital de la Pitié- Salpétrière, Paris, France; Hôpital Georges Pompidou, Paris, France
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Chabaud S, Boufaied I, Corriveau M, Grodzicky T, Senécal J, Moulin V. Apoptosis plays a key role in clonal selection of pathologic fibroblast sub‐populations in systemic sclerosis. FASEB J 2007. [DOI: 10.1096/fasebj.21.5.a13-b] [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: 11/11/2022]
Affiliation(s)
- Stephane Chabaud
- Medicine‐SurgeryLOEX‐CHA‐Laval University1050chemin de Ste FoyQuebecG1S4L8Canada
| | - Ines Boufaied
- Medicine‐SurgeryLOEX‐CHA‐Laval University1050chemin de Ste FoyQuebecG1S4L8Canada
| | - Marie‐Pier Corriveau
- Medicine‐SurgeryLOEX‐CHA‐Laval University1050chemin de Ste FoyQuebecG1S4L8Canada
| | | | | | - Veronique Moulin
- Medicine‐SurgeryLOEX‐CHA‐Laval University1050chemin de Ste FoyQuebecG1S4L8Canada
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Ansoborlo E, Bion L, Doizi D, Moulin C, Lourenco V, Madic C, Cote G, Van der Lee J, Moulin V. Current and future radionuclide speciation studies in biological media. Radiat Prot Dosimetry 2007; 127:97-102. [PMID: 17578878 DOI: 10.1093/rpd/ncm258] [Citation(s) in RCA: 15] [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] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Radionuclides may be released into the environment accidentally or incidentally, which could raise health risks when ingested or inhaled by humans. In order to study the behaviour of radionuclides in the human organism (metabolism, retention, excretion), knowledge of radionuclide speciation is indispensable: speciation governs the transfer, bioavailability and toxicity of elements and is also of considerable interest for decorporation. In this context, the Commissariat à l'Energie Atomique has created a working group on speciation to share data both on thermodynamic constants and on speciation analysis methods of interest to chemists, environmentalists and biologists. The initial focus was on the 31 radionuclides described in different International Commission on Radiological Protection models (HRTM, HAT) and the National Council on Radiation Protection model (wound). Particular attention was devoted to selecting the inorganic and organic ligands, most representative of biological media. The base applied to speciation in solution and at interfaces and solubility (BASSIST) thermodynamic database was developed for this purpose. The aim of this paper is to present the state of the art on radionuclide speciation tools within biological media and to emphasise some missing data in order to orient future research.
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Affiliation(s)
- E Ansoborlo
- CEA/DEN/DRCP/CETAMA, VRH-Marcoule, BP 17171, 30207 Bagnols-sur-Cèze, France.
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Ansoborlo E, Santucci C, Grouiller JP, Boucher L, Flüry-Herard A, Menetrier F, Comte A, Cook E, Moulin V. Development of a database: DACTARI for a radiotoxic element ranking methodology. Radiat Prot Dosimetry 2007; 127:526-30. [PMID: 17578873 DOI: 10.1093/rpd/ncm305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Dosimetric impact studies aim at evaluating potential radiological effects of chronic or acute releases from nuclear facilities. A methodology for ranking radionuclides (RN) in terms of their health-related impact on the human population was first developed at CEA with specific criteria for each RN that could be applied to a variety of situations. It is based, in particular, on applying physico-chemical criteria to the complete RN inventory (present in the release or in the source term) and on applying norms related to radiation protection and chemical toxicology. The initial step consisted in identifying and collecting data necessary to apply the methodology, with reference to a previous database of long-lived radionuclides (LLRN, with half-lives ranging from 30 to 10(14) y) containing 95 radionuclides. The initial results have allowed us to identify missing data and revealed the need to complete the study for both toxic and radiotoxic aspects. This led us to the next step, developing a specific database, DAtabase for Chemical Toxicity and Radiotoxicity Assessment of RadIonuclides (DACTARI), to collect data on chemical toxicity and radiotoxicity, including acute or chronic toxicity, the chemical form of the compounds, the contamination route (ingestion, inhalation), lethal doses, target organs, intestinal and maternal-foetal transfer, drinking water guidelines and the mutagenic and carcinogenic properties.
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Affiliation(s)
- E Ansoborlo
- CEA/DEN/DRCP/CETAMA, VRH-Marcoule, BP 17171, 30207 Bagnol-sur-Cèze, France.
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Triantis V, Moulin V, Looman MWG, Hartgers FC, Janssen RAJ, Adema GJ. Molecular characterization of the murine homologue of the DC-derived protein DC-SCRIPT. J Leukoc Biol 2006; 79:1083-91. [PMID: 16522745 DOI: 10.1189/jlb.1005588] [Citation(s) in RCA: 19] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Dendritic cell-specific transcript (DC-SCRIPT) is a putative DC zinc (Zn) finger-type transcription factor described recently in humans. Here, we illustrate that DC-SCRIPT is highly conserved in evolution and report the initial characterization of the murine ortholog of DC-SCRIPT, which is also preferentially expressed in DC as shown by real-time quantitative polymerase chain reaction, and its distribution resembles that of its human counterpart. Studies undertaken in human embryonic kidney 293 cells depict its nuclear localization and reveal that the Zn finger domain of the protein is mainly responsible for nuclear import. The human and the mouse genes are located in syntenic chromosomal regions and exhibit a similar genomic organization with numerous common transcription factor-binding sites in their promoter region, including sites for many factors implicated in haematopoiesis and DC biology, such as Gfi, GATA-1, Spi-B, and c-Rel. Taken together, these data show that DC-SCRIPT is well-conserved in evolution and that the mouse homologue is more than 80% homologous to the human protein. Therefore, mouse models can be used to elucidate the function of this novel DC marker.
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Affiliation(s)
- Vassilis Triantis
- Department of Tumor Immunology, Nijmegen Center for Molecular Life Sciences, Radboud University Nijmegen Medical Center, The Netherlands
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Eleveld-Trancikova D, Triantis V, Moulin V, Looman MWG, Wijers M, Fransen JAM, Lemckert AAC, Havenga MJE, Figdor CG, Janssen RAJ, Adema GJ. The dendritic cell-derived protein DC-STAMP is highly conserved and localizes to the endoplasmic reticulum. J Leukoc Biol 2004; 77:337-43. [PMID: 15601667 DOI: 10.1189/jlb.0804441] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Recently, we described the molecular identification of dendritic cell-specific TrAnsMembrane protein (DC-STAMP), a multimembrane-spanning protein preferentially expressed by human DC (hDC). In this report, we describe the identification and expression profile of the murine homologue of DC-STAMP (mDC-STAMP) as well as the characterization of the DC-STAMP protein. The results demonstrate that mDC-STAMP is over 90% homologous to hDC-STAMP and is also preferentially expressed by DC in vitro and ex vivo. mDC-STAMP expression is enhanced by interleukin-4 and down-regulated upon DC maturation. Analysis of differently tagged DC-STAMP proteins further demonstrates that hDC-STAMP and mDC-STAMP are glycosylated and primarily localize to an intracellular compartment. Applying confocal microscopy and electron microscopy, we demonstrate that hDC-STAMP localizes to the endoplasmic reticulum (ER) in human embryonic kidney 293 cells as well as hDC transduced with an adenovirus encoding hDC-STAMP-green fluorescent protein fusion protein. These data imply that DC-STAMP may exert its effect in the ER.
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Moulin V, Larochelle S, Langlois C, Thibault I, Lopez‐Valle CA, Roy M. 087 Normal or Pathological Wound Healing: Apoptosis Sensitivity of Myofibroblasts. Wound Repair Regen 2004. [DOI: 10.1111/j.1067-1927.2004.0abstractcf.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Eggert AAO, van der Voort R, Torensma R, Moulin V, Boerman OC, Oyen WJG, Punt CJA, Diepstra H, de Boer AJ, Figdor CG, Adema GJ. Analysis of dendritic cell trafficking using EGFP-transgenic mice. Immunol Lett 2003; 89:17-24. [PMID: 12946860 DOI: 10.1016/s0165-2478(03)00105-6] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Dendritic cells (DCs) are professional antigen presenting cells, well equipped to initiate an immune response. For effective induction of an immune response, DC should migrate from the periphery to the lymph node to present the antigen to T lymphocytes. Currently, tumor-antigen loaded DCs are used in clinical vaccination trials in cancer patients. To investigate the migratory capacity of DC in vivo, a variety of fluorescent and radioactive labels have been used. Here we introduce a novel tool to study DC migration in vivo: DCs generated from enhanced green fluorescent protein (EGFP)-transgenic mice. DC from EGFP-transgenic mice display typical DC behavior and can be matured without affecting their autofluorescence in vitro. In addition, the continuously produced cytoplasmic EGFP in living cells functions as a viability marker, since EGFP released from dying cells does not stain DC from C57Bl/6 mice upon coculture. In vivo migration studies using EGFP-DC and indium-111-labeled DC were performed to determine the efficiency of i.d. versus s.c. administered DC to reach the draining lymph node. The analysis demonstrates that i.d. injection increases the amount of EGFP-DC/indium-111-labeled DC in the lymph node compared to s.c. injection. Subsequent quantitative, phenotypical and ultrastuctural analysis demonstrate that DC generated from EGFP-transgenic mice are well suited to study the migratory behavior, distribution and phenotype of DC in vivo.
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Affiliation(s)
- Andreas A O Eggert
- Tumor Immunology Laboratory, University Medical Center Nijmegen St. Radboud, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands
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Mir O, Dhôte R, Ropert S, Moulin V, Scavennec R, Christoforov B. Erythroblastopénie induite par l'isoniazide : À propos d'un cas. Rev Med Interne 2002. [DOI: 10.1016/s0248-8663(02)80693-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Mir O, Dhote R, Ropert S, Moulin V, Scavennec R, Christoforov B. Hépatite virale C associée à un lymphome splénique de type villeux : Un traitement unique. Rev Med Interne 2002. [DOI: 10.1016/s0248-8663(02)80669-5] [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: 11/27/2022]
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Moulin V, Plamondon M. Differential expression of collagen integrin receptor on fetal vs. adult skin fibroblasts: implication in wound contraction during healing. Br J Dermatol 2002; 147:886-92. [PMID: 12410697 DOI: 10.1046/j.1365-2133.2002.04975.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.7] [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: 12/14/2022]
Abstract
BACKGROUND Fetal skin wound healing is characterized by an absence of contraction and scar formation, two important observations associated with adult healing often leading to pathological problems. OBJECTIVES We have studied the capacity of adult and fetal human skin fibroblasts to contract collagen gels, collagen being the major structural component of dermal matrix. METHODS In parallel with collagen gel contraction studies, we have used fluorescence-activated cell sorter analysis to study the levels of collagen receptors expressed at the surface of fibroblasts derived from fetal or adult skin samples. RESULTS Strong differences were detected between freshly isolated fetal and adult fibroblasts. Fetal fibroblasts had a very low capacity to contract collagen gel, whereas adult cells significantly contracted gels in the same conditions. The expression of alpha1, alpha2 and alpha3 integrin subunits was also significantly different depending of the donor age: alpha1 and alpha3 integrin subunit expression was lower in fetal cells compared with adult cells, whereas alpha2 integrin subunit expression was higher. When grown in monolayers, adult cells showed rapid changes in their contractile capacity and integrin expression while fetal cells were only affected after several passages. CONCLUSIONS These observations indicate that intrinsic differences between fetal and adult fibroblasts can strongly influence the quality of wound repair.
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Affiliation(s)
- V Moulin
- Laboratoire d'organogenèse expérimentale (LOEX), Hôpital Saint-Sacrement du Centre Hospitalier Affilié Universitaire de Québec and Surgery Department, Laval University, Québec, Canada G1S 4L8.
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Affiliation(s)
- Lucie Germain
- LOEX, Hôpital du Saint-Sacrement du CHA, 1050 Chemin Sainte-Foy, Québec, QC G1S 4L8, Canada.
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Laplante AF, Germain L, Auger FA, Moulin V. Mechanisms of wound reepithelialization: hints from a tissue-engineered reconstructed skin to long-standing questions. FASEB J 2001; 15:2377-89. [PMID: 11689463 DOI: 10.1096/fj.01-0250com] [Citation(s) in RCA: 148] [Impact Index Per Article: 6.4] [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: 01/19/2023]
Abstract
Wound closure of epithelial tissues must occur efficiently to restore rapidly their barrier function. We have developed a tissue-engineered wound-healing model composed of human skin keratinocytes and fibroblasts to better understand the mechanisms of reepithelialization. It allowed us to quantify the reepithelialization rate, which was significantly accelerated in the presence of fibrin or platelet-rich plasma. The reepithelialization of these 6 mm excisional wounds required the contribution of keratinocyte proliferation, migration, stratification, and differentiation. The epidermis regenerated progressively from the surrounding wound margins. After 3 days, the neoepidermis showed a complete spectrum of changes. Near the wound margin, the differentiation of the neoepidermis (keratins 1/10, filaggrin, and loricrin) and regeneration of the dermoepidermal junction (laminin 5 and collagen IV) were more advanced than toward the wound center, where the proliferative index was significantly increased. The spatial distribution of keratinocytes distinguished by particular features suggests two complementary mechanisms of reepithelialization: 1) the passive displacement of the superficial layers near the wound margin that would rapidly regenerate a barrier function and 2) the crawling of keratinocytes over each other at the tip of the progressing neoepidermis. Therefore, this study brings a new perspective to long-standing questions concerning wound reepithelialization.
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Affiliation(s)
- A F Laplante
- Laboratoire d'organogénèse expérimentale (LOEX), Hôpital Saint-Sacrement du CHA de Québec and Surgery Department, Laval University, Québec, Canada
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Moulin V, Tam BY, Castilloux G, Auger FA, O'Connor-McCourt MD, Philip A, Germain L. Fetal and adult human skin fibroblasts display intrinsic differences in contractile capacity. J Cell Physiol 2001; 188:211-22. [PMID: 11424088 DOI: 10.1002/jcp.1110] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
One of the differences between fetal and adult skin healing is the unique ability of fetal wounds to heal without contracture and scar formation. Studies have shown that the ratio between the three isoforms of TGFbeta is different in adult and fetal wounds. Thus, we analyzed the capacity of adult and fetal human skin fibroblasts to contract collagen gels after stimulation with TGFbeta isoforms. In control medium, fetal fibroblasts had a contractile capacity similar to that of adult fibroblasts. However, the growth capacity of fetal fibroblasts was completely inhibited, in contrast to adult fibroblasts. When cells were treated with TGFbeta, fetal fibroblasts showed an inhibition of their contractile capacity whereas adult fibroblasts further contracted gels. The contractile response was similar for all isoforms of TGFbeta although TGFbeta3 always had the strongest effect. We considered that the regulation of cell contractile capacity by TGFbeta may be dependent on receptor expression for this cytokine, on myofibroblast differentiation of the cells, or in cell links with matrix. Since TGFbeta receptor analysis did not show differences in receptor affinity, we studied the expression of alpha-smooth muscle (SM) actin, a fibroblast contractile marker and of three integrins, the cell surface receptors specific of the attachment of the fibroblasts with collagen matrix. We observed that the expression of alpha-SM actin and alpha3 and beta1 integrin subunits was increased when TGFbeta was added to the medium of adult fibroblasts whereas the levels of the alpha1 and alpha2 subunits were unchanged. In contrast, fetal fibroblasts treated with TGFbeta showed a decrease of alpha1, alpha2, and beta1 integrin expression but no change in alpha3 integrin and in alpha-SM actin expression. These results indicate that intrinsic differences between fetal and adult fibroblasts might explain their opposite responses to TGFbeta stimuli. The variations in their alpha-SM actin and integrin expression patterns represent potentially important mechanisms used by fetal fibroblasts to regulate their response to cytokines, and likely contribute to the resultant differences in the quality of wound repair.
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Affiliation(s)
- V Moulin
- Laboratoire de recherche des grands brûlés/LOEX, Saint-Sacrement Hospital, Quebec, Canada.
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Mercier F, Moulin V, Barré N, Casanova F, Toulhoat P. Study of the repartition of metallic trace elements in humic acids colloids: potentialities of nuclear microprobe and complementary techniques. Anal Chim Acta 2001. [DOI: 10.1016/s0003-2670(00)01179-x] [Citation(s) in RCA: 8] [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: 10/18/2022]
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Moulin V, Reiller P, Amekraz B, Moulin C. Direct characterization of iodine covalently bound to fulvic acids by electrospray mass spectrometry. Rapid Commun Mass Spectrom 2001; 15:2488-2496. [PMID: 11746921 DOI: 10.1002/rcm.503] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Numerous studies have demonstrated that humic substances (HS) react with iodine to form iodo derivatives and thereby can control the bioavailability of radioisotopes. Unfortunately, none of these studies have provided detailed insights into product compounds and so far, to our knowledge, the direct analysis of these species by electrospray ionization (ESI) mass spectrometry has not been explored. The reactivity of iodine with fulvic acids (FA) present in HS was investigated by means of ESI coupled with a quadrupole time-of-flight (Q-TOF) mass spectrometer. ESI spectra of solutions, that were indicated by MS/MS analysis to have formed iodinated species, apparently displayed singly charged ions corresponding in m/z to hypothesized species, viz., [RI - H](-), R = (substituted FA compound). MS/MS analysis based on the diagnostic fragment ions for FA compounds and their iodo derivatives suggests that FA undergo aromatic substitutions. Furthermore, significant differences in mass profiles are observed that presumably result from extended redox reactions. The ESI-MS technique opens up new opportunities to understand the scavenging properties of HS towards radionuclides and heavy metals for environmental studies.
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Affiliation(s)
- V Moulin
- CEA Saclay, Bât. 121, DEN/DDIN, 91191 Gif-sur-Yvette, France
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Plancque G, Amekraz B, Moulin V, Toulhoat P, Moulin C. Molecular structure of fulvic acids by electrospray with quadrupole time-of-flight mass spectrometry. Rapid Commun Mass Spectrom 2001; 15:827-835. [PMID: 11344544 DOI: 10.1002/rcm.307] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Characterisation of the molecular structure of aquatic fulvic acids (FA) has been performed using a quadrupole time-of-flight (Q-TOF) mass spectrometer equipped with an electrospray ionisation interface. Molecular masses centred around 450 Da and sinusoidal spectral distributions have been obtained for all fulvic acids. Tandem mass spectrometry (MS/MS) experiments showed losses of 18 Da (H(2)O) and 44 Da (CO(2)), and possible molecular structures were determined for the first time to our knowledge. A methodology is reported for evaluating the average elemental composition of FA from high-resolution mass spectra by processing post-acquisition data calculations using molecular size distributions and atomic compositions of ions. The results are found to be consistent with elemental analysis data.
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Affiliation(s)
- G Plancque
- CEA Saclay, Bât. 391, DEN/DPC/SCPA/Laboratoire d'Analyse, de Synthèse et de Spéciation Organométallique, 91191 Gif-sur-Yvette, France.
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Pajak B, De Smedt T, Moulin V, De Trez C, Maldonado-López R, Vansanten G, Briend E, Urbain J, Leo O, Moser M. Immunohistowax processing, a new fixation and embedding method for light microscopy, which preserves antigen immunoreactivity and morphological structures: visualisation of dendritic cells in peripheral organs. J Clin Pathol 2000; 53:518-24. [PMID: 10961175 PMCID: PMC1731227 DOI: 10.1136/jcp.53.7.518] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
AIMS To describe a new fixation and embedding method for tissue samples, immunohistowax processing, which preserves both morphology and antigen immunoreactivity, and to use this technique to investigate the role of dendritic cells in the immune response in peripheral tissues. METHODS This technique was used to stain a population of specialised antigen presenting cells (dendritic cells) that have the unique capacity to sensitise naive T cells, and therefore to induce primary immune responses. The numbers of dendritic cells in peripheral organs of mice either untreated or injected with live Escherichia coli were compared. RESULTS Numbers of dendritic cells were greatly decreased in heart, kidney, and intestine after the inoculation of bacteria. The numbers of dendritic cells in the lung did not seem to be affected by the injection of E coli. However, staining of lung sections revealed that some monocyte like cells acquired morphological and phenotypic features of dendritic cells, and migrated into blood vessles. CONCLUSIONS These observations suggest that the injection of bacteria induces the activation of dendritic cells in peripheral organs, where they play the role of sentinels, and/or their movement into lymphoid organs, where T cell priming is likely to occur.
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Affiliation(s)
- B Pajak
- Département de Biologie Moléculaire, Université Libre de Bruxelles, Belgium.
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