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Talebian Nia M, Leclerc C, Glazebrook C, Chopek J, Giesbrecht GG. Corticospinal and spinal excitability during peripheral or central cooling in humans. J Therm Biol 2023; 112:103489. [PMID: 36796930 DOI: 10.1016/j.jtherbio.2023.103489] [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: 10/21/2022] [Revised: 01/24/2023] [Accepted: 01/25/2023] [Indexed: 01/30/2023]
Abstract
Cold exposure can impair fine and gross motor control and threaten survival. Most motor task decrement is due to peripheral neuromuscular factors. Less is known about cooling on central neural factors. Corticospinal and spinal excitability were determined during cooling of the skin (Tsk) and core (Tco). Eight subjects (four female) were actively cooled in a liquid perfused suit for 90 min (2 °C inflow temperature), passively cooled for 7 min, and then rewarmed for 30 min (41 °C inflow temperature). Stimulation blocks included 10 transcranial magnetic stimulations [eliciting motor evoked potentials (MEPs) which indicate corticospinal excitability], 8 trans-mastoid electrical stimulations [eliciting cervicomedullary evoked potentials (CMEPs) which indicate spinal excitability] and 2 brachial plexus electrical stimulations [eliciting maximal compound motor action potentials (Mmax)]. These stimulations were delivered every 30 min. Cooling for 90 min reduced Tsk to 18.2 °C while Tco did not change. At the end of rewarming Tsk returned to baseline while Tco decreased by 0.8 °C (afterdrop) (P < 0.001). Metabolic heat production was higher than baseline at the end of passive cooling (P = 0.01), and 7 min into rewarming (P = 0.04). MEP/Mmax remained unchanged throughout. CMEP/Mmax increased by 38% at end cooling (although increased variability at this time rendered the increase insignificant, P = 0.23) and 58% at end warming when Tco was 0.8 °C below baseline (P = 0.02). Cooling increased spinal excitability but not corticospinal excitability. Cooling may decrease cortical and/or supraspinal excitability which is compensated for by increased spinal excitability. This compensation is key to providing a motor task and survival advantage.
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Affiliation(s)
- M Talebian Nia
- Faculty of Kinesiology and Recreational Management, University of Manitoba, Canada
| | - C Leclerc
- Faculty of Kinesiology and Recreational Management, University of Manitoba, Canada
| | - C Glazebrook
- Faculty of Kinesiology and Recreational Management, University of Manitoba, Canada
| | - J Chopek
- Dept. of Physiology and Pathophysiology, University of Manitoba, Canada
| | - G G Giesbrecht
- Faculty of Kinesiology and Recreational Management, University of Manitoba, Canada; Faculty of Medicine, Depts. of Anesthesia and Emergency Medicine, University of Manitoba, Canada.
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Duroi Q, Leclerc C, Chardon JF, Le Lez ML, Khanna RK, Pisella PJ. [Screening for diabetic retinopathy in the Centre-Val de Loire region: A study based on the French national healthcare database]. J Fr Ophtalmol 2020; 43:1054-1061. [PMID: 33059944 DOI: 10.1016/j.jfo.2020.01.030] [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: 11/30/2019] [Accepted: 01/23/2020] [Indexed: 10/23/2022]
Abstract
INTRODUCTION The main objective of this study was to investigate the rate of ophthalmological screening for diabetic retinopathy in diabetic individuals in the Centre-Val de Loire (CVDL) region. This study secondarily aimed to identify factors associated with regular ophthalmological screening. MATERIAL AND METHODS Data were extracted from the French national healthcare database (SNDS). Individuals were identified on the basis of reimbursements for antidiabetic medications. Patients who were identified as having at least one reimbursed eye examination between 2015 and 2016 were considered as having regular follow-up. RESULTS In total, 118,181 diabetic individuals residing in CVDL were identified in the SNDS, and 74,048 had undergone ophthalmological screening. The rate of eye examination was 62.7% between 2015 and 2016 and was highly variable within the region (from 65.6% in Loiret to 54.0% in Cher). The main factors associated with regular eye screening were: follow-up with an established primary care physician (OR=2.88), regular follow-up with a diabetologist (OR=2.14), and regular follow-up with an internist (OR=1.57). CONCLUSION This study suggests that ophthalmological screening for diabetic retinopathy in individuals with diabetes in the CVDL region could be significantly improved, particularly in rural areas. Factors influencing compliance with follow-up are multiple but appear mainly related to the patients' quality of overall medical management. These findings highlight the need for public health policies to improve detection and prevention of diabetic retinopathy by promoting comprehensive medical care for diabetic individuals.
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Affiliation(s)
- Q Duroi
- Service d'ophtalmologie, CHRU Bretonneau, 2, boulevard Tonnellé, 37044 Tours cedex 9, France.
| | - C Leclerc
- Observatoire régionale de la santé du Centre-Val de Loire, 1, bis rue porte Madeleine, 45000 Orléans, France
| | - J-F Chardon
- Direction régionale du service médical Centre-Val de Loire, 25, boulevard Jean-Jaurès, 45016 Orléans cedex 1, France
| | - M-L Le Lez
- Service d'ophtalmologie, CHRU Bretonneau, 2, boulevard Tonnellé, 37044 Tours cedex 9, France
| | - R K Khanna
- Service d'ophtalmologie, CHRU Bretonneau, 2, boulevard Tonnellé, 37044 Tours cedex 9, France
| | - P-J Pisella
- Service d'ophtalmologie, CHRU Bretonneau, 2, boulevard Tonnellé, 37044 Tours cedex 9, France
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Leclerc C. AVEC : évaluation d’une Nouvelle Intervention Découlant de la TCC Destinée Aux Proches Des Individus vivant un premier épisode de psychose. Eur Psychiatry 2020. [DOI: 10.1016/j.eurpsy.2013.09.255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
L’efficacité des interventions destinées aux proches des individus vivant une psychose a été soulignée par de nombreuses études dont des méta analyses [5,6] et elles sont recommandées dans les Guides de meilleures pratiques en raison de leurs effets reconnus, soit la diminution des rechutes des personnes souffrant de psychose et une augmentation de leur soutien social [1,3,4].ObjectifCette étude a évalué les retombées d’une nouvelle intervention (AVEC) élaborée par l’auteur et son associée, conçue selon les principes de la thérapie cognitive comportementale pour la psychose, manualisée et administrée par des infirmières spécialisées en santé mentale à des groupes de proches.Méthodeles proches (n = 40) furent évalués avant et après l’intervention et des tests T pairés furent effectués.Résultats78,6 % présentent des améliorations significatives de leur soutien social (The Multidimensional Scale of Perceived Social Support, [6]) et une diminution significative de leur détresse (Brief Symptom Inventory, [2]). Ils témoignent aussi de leur satisfaction à l’égard de l’intervention de groupe. Des résultats qualitatifs de même que le contenu du manuel d’intervention seront présentés et les implications cliniques discutées.
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Verret B, Rossoni C, Lebeherec D, Michiels S, Castanon-Alvarez E, Leclerc C, Delaloge S, Artaud C, Lacroix-Tikri M. Abstract P3-05-14: Expression of the tumor associated carbohydrate antigen Tn and immune effectors in invasive breast cancer. Cancer Res 2018. [DOI: 10.1158/1538-7445.sabcs17-p3-05-14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background:
Glycosylation is a post-translational modification generating complex carbohydrate O-glycans. Tn antigen, a N-acetyl-galactosamine-α-O-Ser/Thr residue that is the core glycosylated component of complex mucin-type O-glycans, is expressed in breast cancers. Tn has been associated with invasion, survival and decreased T-cell mediated immune response in several types of cancer including breast cancer. There is therefore a potential rationale to combine Tn vaccine with checkpoint blockers such as PD-1/PDL-1 inhibitors. Little is known regarding the link between the respective expression of Tn antigen, PDL-1, and TILs, in breast cancer. Our study aimed at characterizing Tn expression in a series of invasive breast cancers, and its correlation with immune response.
Methods
Tn expression was analyzed by immunohistochemistry performed on a tissue microarray of 1864 invasive breast cancer samples (1850 patients for statistical analyses), consisting of 189 (10%) TNBC, 1601 (86%) ER and/or PR positive à checker tumors and 191 (10%) HER-2 positive tumors treated at our institution between 2005 and 2013. Among these cases, 50 luminal B tumors and 50 TNBC were selected for full section and immune analysis, i.e. to study the pattern of Tn expression across whole tumor section and the link between Tn expression and the level of CD3+ and CD8+ infiltrates, and PDL-1 expression. The level of Tn expression was assessed using H-score, combining the percentage of stained cells with staining intensity.
Results:
In the 100 initial samples, Tn expression was observed in 95%, with a H-Score>10 in 85% of the cases, and with homogeneous staining across the whole tumor section in 86% of the cases. Tn expression was increased in Luminal B subtype as compared to TNBC, with a mean H-Score of 100.9 vs 55, respectively (p <0,0001). The CD3+ infiltrate was more important in TNBC as compared to luminal B tumors (mean stromal CD3+: 34.3% vs 21.2%, p=0,0052). No significant difference was found for the CD8+ infiltrate. PDL-1 expression in stromal cells (≥1%) was observed in 43% of the cases, and increased in TBNC as compared to Luminal B (mean of 7.3% vs 2.2% of cells respectively, p=0.0252). In both tumor subtypes, we observed a positive correlation between the CD3/CD8 infiltrates and PDL-1 expression in stroma cells (p<0,0001), but not with Tn expression.
In the TMA cohort, Tn expression was observed in 1723 (92%) tumors with a mean H-Score of 82.75. Similarly, to the results obtained in full section, Tn expression was less intense in TNBC as compared to other subtypes (mean H-Score of 62 vs 85, p<0.001). Tn expression was lower in histological grade I as compared to grade II/III tumors (64,69 for grade I, 88,84 for grade II and 88.99 for grade III, p<0.0001), and significantly higher in HER2 positive tumors versus others (mean H score 62,06 for HER2-/RE-, 119,05 for HER2+ and 80,25 for HER2-/RE+, p<0.0001).
Conclusion:
Our study shows a lower level of expression of Tn antigen in TNBC as compared to luminal tumors. We could not identify any correlation between Tn antigen expression and immune status of the tumor as defined by CD3+, CD8+ and PDL-1+ infiltrate in tumor stroma. The role of Tn antigen in the HER2-positive subgroup requires further investigation.
Citation Format: Verret B, Rossoni C, Lebeherec D, Michiels S, Castanon-Alvarez E, Leclerc C, Delaloge S, Artaud C, Lacroix-Tikri M. Expression of the tumor associated carbohydrate antigen Tn and immune effectors in invasive breast cancer [abstract]. In: Proceedings of the 2017 San Antonio Breast Cancer Symposium; 2017 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2018;78(4 Suppl):Abstract nr P3-05-14.
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Affiliation(s)
- B Verret
- Gustave Roussy, Villejuif, France; Institut Pasteur, Paris, France
| | - C Rossoni
- Gustave Roussy, Villejuif, France; Institut Pasteur, Paris, France
| | - D Lebeherec
- Gustave Roussy, Villejuif, France; Institut Pasteur, Paris, France
| | - S Michiels
- Gustave Roussy, Villejuif, France; Institut Pasteur, Paris, France
| | | | - C Leclerc
- Gustave Roussy, Villejuif, France; Institut Pasteur, Paris, France
| | - S Delaloge
- Gustave Roussy, Villejuif, France; Institut Pasteur, Paris, France
| | - C Artaud
- Gustave Roussy, Villejuif, France; Institut Pasteur, Paris, France
| | - M Lacroix-Tikri
- Gustave Roussy, Villejuif, France; Institut Pasteur, Paris, France
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Majlessi L, Sayes F, Bureau JF, Pawlik A, Michel V, Jouvion G, Huerre M, Severgnini M, Consolandi C, Peano C, Brosch R, Touati E, Leclerc C. Colonization with Helicobacter is concomitant with modified gut microbiota and drastic failure of the immune control of Mycobacterium tuberculosis. Mucosal Immunol 2017; 10:1178-1189. [PMID: 28145441 DOI: 10.1038/mi.2016.140] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Accepted: 12/28/2016] [Indexed: 02/04/2023]
Abstract
Epidemiological and experimental observations suggest that chronic microbial colonization can impact the immune control of other unrelated pathogens contracted in a concomitant or sequential manner. Possible interactions between Mycobacterium tuberculosis infection and persistence of other bacteria have scarcely been investigated. Here we demonstrated that natural colonization of the digestive tract with Helicobacter hepaticus in mice is concomitant with modification of the gut microbiota, subclinical inflammation, and drastic impairment of immune control of the growth of subsequently administered M. tuberculosis, which results in severe lung tissue injury. Our results provided insights upon the fact that this prior H. hepaticus colonization leads to failures in the mechanisms that could prevent the otherwise balanced cross-talk between M. tuberculosis and the immune system. Such disequilibrium ultimately leads to the inhibition of control of mycobacterial growth, outbreak of inflammation, and lung pathology. Among the dysregulated immune signatures, we noticed a correlation between the detrimental lung injury and the accumulation of activated T-lymphocytes. Our findings suggest that the impact of prior Helicobacter spp. colonization and subsequent M. tuberculosis parasitism might be greater than previously thought, which is a key point given that both species are among the most frequent invasive bacteria in human populations.
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Affiliation(s)
- L Majlessi
- Institut Pasteur, Unité de Pathogénomique Mycobactérienne Intégrée, Paris, France.,Institut Pasteur, Unité de Régulation Immunitaire et Vaccinologie, Paris, France.,INSERM U1041, Paris, France
| | - F Sayes
- Institut Pasteur, Unité de Pathogénomique Mycobactérienne Intégrée, Paris, France.,Institut Pasteur, Unité de Régulation Immunitaire et Vaccinologie, Paris, France.,INSERM U1041, Paris, France
| | - J-F Bureau
- Institut Pasteur, Unité de Génétique Fonctionnelle des Maladies Infectieuses, Paris, France
| | - A Pawlik
- Institut Pasteur, Unité de Pathogénomique Mycobactérienne Intégrée, Paris, France
| | - V Michel
- Institut Pasteur, Unité de Pathogenèse de Helicobacter, Paris, France.,CNRS ERL3526, Paris, France
| | - G Jouvion
- Institut Pasteur, Unité d'Histopathologie Humaine et Modèles Animaux, Paris, France.,Institut Pasteur, URE Histotechnologie et Pathologie, Paris, France
| | - M Huerre
- Institut Pasteur, URE Histotechnologie et Pathologie, Paris, France.,Institut Curie, Département de Pathologie, Paris, France
| | - M Severgnini
- Institute of Biomedical Technologies, CNR, Segrate, Milan, Italy
| | - C Consolandi
- Institute of Biomedical Technologies, CNR, Segrate, Milan, Italy
| | - C Peano
- Institute of Biomedical Technologies, CNR, Segrate, Milan, Italy
| | - R Brosch
- Institut Pasteur, Unité de Pathogénomique Mycobactérienne Intégrée, Paris, France
| | - E Touati
- Institut Pasteur, Unité de Pathogenèse de Helicobacter, Paris, France.,CNRS ERL3526, Paris, France
| | - C Leclerc
- Institut Pasteur, Unité de Régulation Immunitaire et Vaccinologie, Paris, France.,INSERM U1041, Paris, France
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Breton J, Jacquemot J, Leclerc C, Connil N, Legrand R, Déchelotte P, Fetissov S. SUN-LB273: Effects of Chronic Food Restriction and Sex on the Capacity of Gut Microbiota to Produce CLPB Protein: Putative Mechanisms Underlying Risk Factors of Eating Disorders. Clin Nutr 2016. [DOI: 10.1016/s0261-5614(16)30629-x] [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: 11/25/2022]
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Py JY, Barnoux M, Sapey T, Leclerc C, Dehaut F. Comment améliorer l’harmonisation de l’entretien pré-don ? Transfus Clin Biol 2015. [DOI: 10.1016/j.tracli.2015.06.281] [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: 10/22/2022]
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8
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Py JY, Barnoux M, Leclerc C, Dehaut F. La mesure non invasive de l’hémoglobine pré-don : le moyen de tester tous les donneurs ? Transfus Clin Biol 2015. [DOI: 10.1016/j.tracli.2015.06.282] [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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9
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Durieux S, Py JY, Wilpotte S, Leclerc C, Dehaut F. Hémovigilance et sécurité donneur : existe-t-il une rythmicité horaire dans la survenue des malaises vagaux ? Transfus Clin Biol 2015. [DOI: 10.1016/j.tracli.2015.06.056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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10
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Leclerc C, Bellard C, Luque GM, Courchamp F. Overcoming extinction: understanding processes of recovery of the Tibetan antelope. Ecosphere 2015. [DOI: 10.1890/es15-00049.1] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Abstract
Most studies of the effects of global changes on biodiversity focus on a single threat, but multiple threats lead to species extinction. We lack spatially explicit assessments of the intensity of multiple threats and their impacts on biodiversity. Here, we used a novel metric of cumulative threats and impacts to assess the consequences of multiple threats on 196 endemic species across the USA. We predict that large areas with high cumulative impact scores for amphibians, birds, mammals, and reptiles will be concentrated in the eastern part of the USA by the 2050 s and 2080 . These high cumulative impact values are due mainly to the presence of invasive species, climate change, cropland and pasture areas; additionally, a significant proportion of endemic species are vulnerable to some of these threats where they occur. This analysis provides a useful means of identifying where conservation measures and monitoring programs that should consider multiple threats should be implemented in the future.
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Affiliation(s)
- C. Bellard
- Genetics, Evolution & Environment, Div Biosciences, Center for Biodiversity, Environment & Research, University College of London
- Ecologie, Systématique & Evolution, UMR CNRS 8079, Univ. Paris-Sud, F-91405 Orsay Cedex, France
| | - C. Leclerc
- Ecologie, Systématique & Evolution, UMR CNRS 8079, Univ. Paris-Sud, F-91405 Orsay Cedex, France
| | - F. Courchamp
- Department of Ecology and Evolutionary Biology and Center for Tropical Research, Institute of the Environment and Sustainability, University of California Los Angeles, CA 90095, USA
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Futel M, Leclerc C, Le Bouffant R, Buisson I, Néant I, Umbhauer M, Moreau M, Riou JF. TRPP2-dependent Ca2+ signaling in dorso-lateral mesoderm is required for kidney field establishment in Xenopus. Development 2015. [DOI: 10.1242/dev.123695] [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: 11/20/2022]
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Monthé-Sagan K, Leclerc C, Hanouz JL, Fellahi JL. [How do residents in anesthesiology learn their future speciality? A resident satisfaction survey in the Northwest of France]. ACTA ACUST UNITED AC 2013; 32:397-401. [PMID: 23684432 DOI: 10.1016/j.annfar.2013.03.009] [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] [Received: 10/22/2012] [Accepted: 03/26/2013] [Indexed: 11/25/2022]
Abstract
STUDY DESIGN Opinion survey. OBJECTIVES To know the level of satisfaction and the expectations of the residents in anesthesiology in the Northwest of France. MATERIALS AND METHODS A standardized questionnaire assessing the theoretical and practical training was mailed to the 4th- and 5th-year anesthesiology residents (DESAR 4 and 5) in the Northwest of France over a 6-month period. Four items were studied: the profile of responders, the approval of theoretical and practical teaching, and the improvement propositions. RESULTS The response rate was 61%. A change in speciality has never been looked for by 95% of residents. The training was considered as good or very good in 90% of cases. The elements of theoretical teaching are variably considered according to their merits. Practical training gave entire satisfaction whatever its type and place. Additional specific training in regional anesthesia, difficult intubation and echocardiography is required. Most DESAR would be interested in obtaining a post-internship job or a stage in private hospitals. DISCUSSION Teaching generally meets the expectations of students. These regional data are similar with the results of French national surveys. They highlight the good quality of training but suggest it could be further improved. CONCLUSION The homogeneity of teaching, based on the objectives proposed by the French College of Anesthesiologists, and the dynamism of the French Society of Anesthesiology and Critical Care Medicine ensures the quality of training for future specialists.
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Affiliation(s)
- K Monthé-Sagan
- Pôle réanimations anesthésie Samu/Smur, CHU de Caen, avenue de la Côte-de-Nacre, 14000 Caen, France.
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Serfaty A, Taille C, Buhl C, Christol R, Loulizi H, Leclerc C, Elhouseini R, Benifla JL, Coulomb A, Siffroi JP, Jouannic JM, Cisse G, Frenkiel J, Talvard O, Taright N, Brunel L, Bréart G. Apport d’une démarche d’assurance qualité de la production de l’information médicalisée pour l’enregistrement et le codage des mort-nés par le PMSI, dans les sites de naissances de l’Assistance publique–Hôpitaux de Paris (projet NEMOSIS). Rev Epidemiol Sante Publique 2013. [DOI: 10.1016/j.respe.2013.01.011] [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: 10/27/2022] Open
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Bibonne A, Néant I, Batut J, Leclerc C, Moreau M, Gilbert T. Three calcium-sensitive genes, fus, brd3 and wdr5, are highly expressed in neural and renal territories during amphibian development. Biochim Biophys Acta 2012; 1833:1665-71. [PMID: 23287019 DOI: 10.1016/j.bbamcr.2012.12.015] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2012] [Revised: 12/12/2012] [Accepted: 12/14/2012] [Indexed: 01/08/2023]
Abstract
Numerous Ca(2+) signaling events have been associated with early development of vertebrate embryo, from fertilization to organogenesis. In Xenopus laevis, Ca(2+) signals are key regulators in the earliest steps of the nervous system development. If neural determination is one of the best-characterized examples of the role of Ca(2+) during embryogenesis, increasing literature supports a determining role of organogenesis and differentiation. In blastula the cells of the presumptive ectoderm (animal caps) are pluripotent and can be induced toward neural fate with an intracellular increase of free Ca(2+) triggered by caffeine. To identify genes that are transcribed early upon Ca(2+) stimuli and involved in neural determination, we have constructed a subtractive cDNA library between neuralized and non-neuralized animal caps. Here we present the expression pattern of three new Ca(2+)-sensitive genes: fus (fused in sarcoma), brd3 (bromodomain containing 3) and wdr5 (WD repeat domain 5) as they all represent potential regulators of the transcriptional machinery. Using in situ hybridization we illustrated the spatial expression pattern of fus, brd3 and wdr5 during early developmental stages of Xenopus embryos. Strikingly, their domains of expression are not restricted to neural territories. They all share a specific expression throughout renal organogenesis which has been found to rely also on Ca(2+) signaling. This therefore highlights the key function of Ca(2+) target genes in specific territories during early development. We propose that Ca(2+) signaling through modulation of fus, brd3 and wdr5 expressions can control the transcription machinery to achieve proper embryogenesis. This article is part of a Special Issue entitled: 12th European Symposium on Calcium.
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Affiliation(s)
- A Bibonne
- Université Toulouse 3, Centre de Biologie du Développement, Toulouse, France
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Leclerc C. [New practices in anaesthesia. About the pressure-controlled ventilation in anaesthesia]. Ann Fr Anesth Reanim 2012; 31:490. [PMID: 22464167 DOI: 10.1016/j.annfar.2012.02.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2012] [Accepted: 02/14/2012] [Indexed: 05/31/2023]
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Mascarell L, Saint-Lu N, Moussu H, Zimmer A, Louise A, Lone Y, Ladant D, Leclerc C, Tourdot S, Van Overtvelt L, Moingeon P. Oral macrophage-like cells play a key role in tolerance induction following sublingual immunotherapy of asthmatic mice. Mucosal Immunol 2011; 4:638-47. [PMID: 21775981 DOI: 10.1038/mi.2011.28] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Sublingual allergen-specific immunotherapy (SLIT) is a safe and efficacious treatment for type 1 respiratory allergies. Herein, we investigated the key subset(s) of antigen-presenting cells (APCs) involved in antigen/allergen capture and tolerance induction during SLIT. Following sublingual administration, fluorochrome-labeled ovalbumin (OVA) is predominantly captured by oral CD11b⁺CD11c⁻ cells that migrate to cervical lymph nodes (CLNs) and present the antigen to naive CD4⁺ T cells. Conditional depletion with diphtheria toxin of CD11b⁺, but not CD11c⁺ cells, in oral tissues impairs CD4⁺ T-cell priming in CLNs. In mice with established asthma to OVA, specific targeting of the antigen to oral CD11b⁺ cells using the adenylate cyclase vector system reduces airway hyperresponsiveness (AHR), eosinophil recruitment in bronchoalveolar lavages (BALs), and specific Th2 responses in CLNs and lungs. Oral CD11b⁺CD11c⁻ cells resemble tolerogenic macrophages found in the lamina propria (LP) of the small intestine in that they express the mannose receptor CD206, as well as class-2 retinaldehyde dehydrogenase (RALDH2), and they support the differentiation of interferon-γ/interleukin-10 (IFNγ/IL-10)-producing Foxp3⁺ CD4⁺ regulatory T cells. Thus, among the various APC subsets present in oral tissues of mice, macrophage-like cells play a key role in tolerance induction following SLIT.
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Affiliation(s)
- L Mascarell
- Research and Development, Stallergènes SA, Antony, France
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Dessouroux A, Seyrig C, Leclerc C. Point sur la qualité des extraits fluides glycérinés de plantes fraîches standardisés (EPS) et leur intérêt pharmacologique. ACTA ACUST UNITED AC 2011. [DOI: 10.1007/s10298-011-0649-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Leclerc C, Levesque C, Soulard D. [Upper digestive endoscopy in children with laryngeal mask evaluate with 200 patients]. Ann Fr Anesth Reanim 2011; 30:608-609. [PMID: 21602015 DOI: 10.1016/j.annfar.2011.04.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2010] [Accepted: 04/11/2011] [Indexed: 05/30/2023]
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Baujat B, Altabaa K, Meyers M, Wagner I, Leclerc C, Chabolle F. Medicoeconomic study of microsurgical head and neck reconstructions. Eur Ann Otorhinolaryngol Head Neck Dis 2011; 128:121-6. [DOI: 10.1016/j.anorl.2011.01.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2010] [Revised: 01/03/2011] [Accepted: 01/09/2011] [Indexed: 11/24/2022]
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Bieuvelet S, Seyrig C, Leclerc C. Enquête préliminaire sur l’intérêt de consommer des probiotiques, du cyprès et de l’échinacée en prévention des infections hivernales. Phytothérapie 2011; 9:120-125. [PMID: 32288746 PMCID: PMC7104609 DOI: 10.1007/s10298-011-0613-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Introduction L’hiver est une période propice aux infections virales. Certaines plantes et souches probiotiques pourraient conférer à notre organisme une meilleure protection en renforçant nos défenses immunitaires. Objectif Cette enquête préliminaire avait pour objectif d’évaluer l’intérêt de consommer des probiotiques, du cyprès et de l’échinacée pour prévenir l’apparition d’affections hivernales. Méthode Il s’agit d’une enquête déclarative par questionnaire. Son objectif était de comparer l’incidence des affections hivernales dans deux groupes de sujets âgés de 18 à 65 ans en bonne santé, complémentés ou non avec du Lactibiane Référence® et des comprimés de Phytostandard® cyprès-échinacée pendant trois mois ou plus en période hivernale. Résultats L’incidence de la grippe (5 vs 10 %, p = 0,012), du rhume (29 vs 50 %, p = 0,002) et de la rhinopharyngite (9 vs 15 %, p = 0,017) était significativement moins élevée chez les personnes complémentées que chez celles non com-plémentées. L’incidence du rhume était également significativement moins élevée dans un sous-groupe de personnes sensibles aux infections hivernales complémentées pendant trois mois ou plus, comparées à celles ne s’étant pas com-plémentées (36 vs 78 % de rhume, p = 0,004). Conclusion Les résultats montrent que la consommation des deux produits pendant trois mois ou plus est associée à une moindre incidence des affections hivernales de types grippe, rhume et rhinopharyngite. Il pourrait être intéressant de mener ultérieurement une étude prospective de plus grande envergure pour déterminer le rôle exact respectif du Lactibiane Référence® et des comprimés de Phytostandard® cyprès-échinacée dans la prévention des affections hivernales.
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Fornier W, Leclerc C, Digeon-Rouxel C. De la difficulté d’étayer un probable diagnostic d’intoxication par la mépivacaïne. Critères d’imputabilité pharmacologiques ou dosage plasmatique ? ACTA ACUST UNITED AC 2010; 29:927-8. [DOI: 10.1016/j.annfar.2010.10.002] [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] [Received: 09/09/2010] [Accepted: 10/06/2010] [Indexed: 11/26/2022]
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Dupont B, Quesnel P, Lebrun A, Bétrencourt MA, Louessard D, Leclerc C. [What advantages get by binomial activity in anaesthesia for the patient, the organization, the safety, the physician and nurse anaesthetists? An opinion survey in a French university town]. Ann Fr Anesth Reanim 2010; 29:311-312. [PMID: 20346612 DOI: 10.1016/j.annfar.2010.02.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
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Le Lostec Z, Leclerc C, Cheron M, Somogyi A, Misbahi R, Welker Y. Arthrite tuberculeuse périphérique : y penser en cas d’arthrite traînante post-traumatique. Rev Med Interne 2009. [DOI: 10.1016/j.revmed.2009.10.221] [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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Burdy G, Dalban-Sillas B, Leclerc C, Bonnaventure F, Roullet Audy JC, Frileux P. [Financial analysis of a department of general surgery in a French hospital. The new "fee-for-service" reimbursement system results in a high deficit for emergency care]. ACTA ACUST UNITED AC 2009; 146:469-76. [PMID: 19833334 DOI: 10.1016/j.jchir.2009.09.003] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
GOAL The aim of this study was to perform a detailed analysis of income and expense in a department of general surgery in a French hospital under the new system of funding based on a "fee-for-service" principle. METHODS All hospital stays of year 2006 were analysed retrospectively. The conditions of admission (elective vs. emergency), the principal diagnosis, and surgical procedures were examined. We determined hospital costs and the reimbursement for every admission. RESULTS One thousand nine hundred and eighty-five hospitalizations generated an income of 8Meuros with a deficit of 1.3Meuros. The 775 elective admissions generated 50% of the income and 13% of the deficit (178,562euros). Seven hundred and forty-nine emergency admissions generated 45% of the income and 82% of deficit (1.1Meuros). Four hundred and sixty-one admissions for endoscopy generated 5% of the income and 5% of the deficit (67,249euros). Hospital stays of less than two days (the minimum duration of stay for total reimbursement) caused a loss of 122,624euros. Length of hospital stay below the lower limit caused a loss of 42,850euros. CONCLUSION Elective surgical activity in digestive surgery can generate a balanced budget provided the length of hospital stay is reduced to the minimum, sometimes to the detriment of patient comfort. Emergency admissions result in a large deficit between cost and reimbursement; this fact may lead hospitals to avoid emergency activity in the future unless appropriate remedial measures are taken.
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Affiliation(s)
- G Burdy
- Service de chirurgie digestive, hôpital Foch, 40, rue Worth, 92151 Suresnes cedex, France.
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Bay S, Fort S, Birikaki L, Ganneau C, Samain E, Coïc YM, Bonhomme F, Dériaud E, Leclerc C, Lo-Man R. Induction of a melanoma-specific antibody response by a monovalent, but not a divalent, synthetic GM2 neoglycopeptide. ChemMedChem 2009; 4:582-7. [PMID: 19226501 DOI: 10.1002/cmdc.200900032] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The GM2 ganglioside represents an important target for specific anticancer immunotherapy. We designed and synthesized a neoglycopeptide immunogen displaying one or two copies of the GM2 tetrasaccharidic moiety. These glycopeptides were prepared using the Huisgen cycloaddition, which enables the efficient ligation of the alkyne-functionalized biosynthesized GM2 with an azido CD4(+) T cell epitope peptide. It is worth noting that the GM2 can be produced on a gram scale in bacteria, which can be advantageous for a scale-up of the process. We show here for the first time that a fully synthetic glycopeptide, which is based on a ganglioside carbohydrate moiety, can induce human tumor cell-specific antibodies after immunization in mice. Interestingly, the monovalent, but not the divalent, form of GM2 peptide construct induced antimelanoma antibodies. Unlike traditional vaccines, this vaccine is a pure chemically-defined entity, a key quality for consistent studies and safe clinical evaluation. Therefore, such carbohydrate-peptide conjugate represents a promising cancer vaccine strategy for active immunotherapy targeting gangliosides.
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Affiliation(s)
- S Bay
- Institut Pasteur, Unité de Chimie des Biomolécules, URA CNRS, Paris, France.
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Leclerc C, Rouaud J. [Asystole and severe bradycardia induced by sevoflurane associated with alfentanil in adults]. Ann Fr Anesth Reanim 2009; 28:392-393. [PMID: 19356890 DOI: 10.1016/j.annfar.2009.02.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
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Butin G, Kisielewicz I, Dupont B, Leclerc C. [A tool to evaluate preoperative anxiety in the operating room]. Ann Fr Anesth Reanim 2009; 28:256-257. [PMID: 19297119 DOI: 10.1016/j.annfar.2009.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
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Leclerc C. [A first-degree heart block existed before anaesthesia and was only discovered after...]. Ann Fr Anesth Reanim 2008; 27:349-350. [PMID: 18430542 DOI: 10.1016/j.annfar.2008.03.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
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Leclerc C, Haond P, Sillard B. [An unusual complication of ventral decubitus]. Ann Fr Anesth Reanim 2008; 27:109-110. [PMID: 18063341 DOI: 10.1016/j.annfar.2007.10.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
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Hervas-Stubbs S, Rueda P, Lopez L, Leclerc C. Insect baculoviruses strongly potentiate adaptive immune responses by inducing type I IFN. J Immunol 2007. [DOI: 10.4049/jimmunol.178.10.6653] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Leclerc C. [When anaesthetist remove adenoids...]. Ann Fr Anesth Reanim 2007; 26:466-7. [PMID: 17346921 DOI: 10.1016/j.annfar.2007.02.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
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Silva M, Fourcade C, Fartoukh C, Lenormand B, Buchonnet G, Callat MP, Leclerc C, Basuyau JP, Vasse M. Lymphocyte volume and conductivity indices of the haematology analyser CoulterR GEN.STM in lymphoproliferative disorders and viral diseases. ACTA ACUST UNITED AC 2006; 28:1-8. [PMID: 16430452 DOI: 10.1111/j.1365-2257.2006.00748.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [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: 11/29/2022]
Abstract
The haematology analyser Coulter GEN.S gives a set of data -'positional parameters'- defining white blood cell (WBC) populations by mean of index values (mean and standard deviation of volume, conductivity and scatter, used to identify the WBC populations). The volume and conductivity parameters related to the lymphocytes were analysed at diagnosis in patients suffering from chronic B-lymphocytic leukaemia (B-CLL), other non-CLL lymphoproliferative disorders (OLPD) and viral diseases. The standard deviation of volume index (SDVI) is significantly higher in the three groups, whereas the mean volume index (MVI) is significantly lower in B-CLL, and increased in OLPD and viral diseases. These two groups could be distinguished by their mean conductivity index (MCI), which is significantly lower in viral disease group. Cut-offs were calculated for each parameter by the mean of Receiver Operating Characteristic (ROC) analysis. The study of the detection performances showed that the combination of lymphocyte count with SDVI, MVI and MCI could be used with a good sensitivity and specificity to discriminate between the most frequent lymphocyte pathologies, even in patients with normal lymphocyte count.
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Affiliation(s)
- M Silva
- Laboratoire d'Hématologie, Hôpital Charles Nicolle, CHU de Rouen, France
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Guerrault MN, Leclerc C, Langevin S, Merian-Brosse L, Brossard D, Welker Y. Enquête sur la mise en place d’une consultation pharmaceutique pour les patients sous antirétroviraux. Presse Med 2005; 34:1563-70. [PMID: 16314815 DOI: 10.1016/s0755-4982(05)84226-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Abstract
OBJECTIVE Highly active anti-retroviral therapies (HAART) in HIV treatment can result in complex treatment regimens. We surveyed HIV patients followed in the infectious disease department of Saint-Germain-en-Laye Hospital to assess the interest of offering patients a consultation with a pharmacist. METHODS The 3-part questionnaire enabled us to assess the medical and pharmaceutical information given to the patient, adherence, and risk factors for poor observance. The questionnaire was distributed to all patients, regardless of whether they were receiving treatment. A simple adherence score was computed as well as a score for the risk of poor adherence. RESULTS Ninety patients returned analyzable questionnaires: 65 (72.2%) thought a pharmaceutical consultation would be useful. They felt it should cover in priority the following subjects: drug interactions (51%), secondary effects (49%), and what to do after forgetting a dose (44%). Treatment was perceived as positive by 82 patients (91%) and tolerated well by 57 (65%). Sixty patients (66.3%) reported that they occasionally forgot a dose, 37 (41.3%) that they regularly did. The results showed good adherence by 61.3% and poor adherence by 38.5%. Risk of non-adherence was significantly associated with three factors: the number of pills to take, the number of daily doses, and the length of the treatment. CONCLUSION Our survey shows the interest of consultations with pharmacists as a clinical service. By reinforcing the patient's understanding, these can complete and supplement the physician's explanation and instructions on pharmaceutical topics, especially those that could not be addressed during the clinical visit. The main aim of this process is to improve adherence, which is a key element in treatment efficacy.
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Affiliation(s)
- M-N Guerrault
- Service de pharmacie, CHI de Poissy- Saint-Germain- en-Laye.
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Leclerc C, Rouaud J, Bénateau H, Argouarch LP. [Near miss stuck in the throat: when the organization generates undesirable event...]. Ann Fr Anesth Reanim 2005; 24:1404. [PMID: 16099132 DOI: 10.1016/j.annfar.2005.07.073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
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Leclerc C, Dupont B. [Respiratory acidosis during paediatric anaesthesia: eyes wide shut?]. Ann Fr Anesth Reanim 2005; 24:1315-6. [PMID: 16006093 DOI: 10.1016/j.annfar.2005.05.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
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Burtey S, Leclerc C, Nabais E, Munch P, Gohory C, Moreau M, Fontés M. Cloning and expression of the amphibian homologue of the human PKD1 gene. Gene 2005; 357:29-36. [PMID: 15996834 DOI: 10.1016/j.gene.2005.05.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2004] [Revised: 04/20/2005] [Accepted: 05/04/2005] [Indexed: 11/16/2022]
Abstract
PKD1 is the gene responsible for autosomal dominant polycystic kidney disease (ADPKD) type 1 in humans. The PKD1 gene product is likely to be a calcium channel regulator. In this paper, we describe the isolation and characterization of the Xenopus homologue of the human PKD1 gene. We isolated and cloned genomic fragments corresponding to the amphibian homologue of PKD1 from a BAC library, and after sequencing the clones, we designed primers for the amplification of the transcript and sequenced 10 kb of ORF. The sequence of the putative protein clearly demonstrated that this gene is the homologue of human PKD1. Analysis of the tissue expression patterns of xPKD1 demonstrated a high level of expression in the kidney. A similar analysis in developing embryos and in an in vitro nephrogenic system suggests that xPKD1 is associated with, and probably involved in, the development of the amphibian pronephros.
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Affiliation(s)
- S Burtey
- INSERM UMR491, IPHM, Faculté de Médecine de la Timone, 27 Bd. J. Moulin, 13385 Marseille Cedex 5, France
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Aubert B, Barate R, Boutigny D, Couderc F, Gaillard JM, Hicheur A, Karyotakis Y, Lees JP, Tisserand V, Zghiche A, Palano A, Pompili A, Chen JC, Qi ND, Rong G, Wang P, Zhu YS, Eigen G, Ofte I, Stugu B, Abrams GS, Borgland AW, Breon AB, Brown DN, Button-Shafer J, Cahn RN, Charles E, Day CT, Gill MS, Gritsan AV, Groysman Y, Jacobsen RG, Kadel RW, Kadyk J, Kerth LT, Kolomensky YG, Kukartsev G, Leclerc C, Lynch G, Merchant AM, Mir LM, Oddone PJ, Orimoto TJ, Pripstein M, Roe NA, Ronan MT, Shelkov VG, Telnov AV, Wenzel WA, Ford K, Harrison TJ, Hawkes CM, Morgan SE, Watson AT, Fritsch M, Goetzen K, Held T, Koch H, Lewandowski B, Pelizaeus M, Steinke M, Boyd JT, Chevalier N, Cottingham WN, Kelly MP, Latham TE, Wilson FF, Cuhadar-Donszelmann T, Hearty C, Mattison TS, McKenna JA, Thiessen D, Kyberd P, Teodorescu L, Blinov VE, Bukin AD, Druzhinin VP, Golubev VB, Ivanchenko VN, Kravchenko EA, Onuchin AP, Serednyakov SI, Skovpen YI, Solodov EP, Yushkov AN, Best D, Bruinsma M, Chao M, Eschrich I, Kirkby D, Lankford AJ, Mandelkern M, Mommsen RK, Roethel W, Stoker DP, Buchanan C, Hartfiel BL, Gary JW, Shen BC, Wang K, Del Re D, Hadavand HK, Hill EJ, MacFarlane DB, Paar HP, Rahatlou S, Sharma V, Berryhill JW, Campagnari C, Dahmes B, Levy SL, Long O, Lu A, Mazur MA, Richman JD, Verkerke W, Beck TW, Eisner AM, Heusch CA, Lockman WS, Schalk T, Schmitz RE, Schumm BA, Seiden A, Spradlin P, Williams DC, Wilson MG, Albert J, Chen E, Dubois-Felsmann GP, Dvoretskii A, Hitlin DG, Narsky I, Piatenko T, Porter FC, Ryd A, Samuel A, Yang S, Jayatilleke S, Mancinelli G, Meadows BT, Sokoloff MD, Abe T, Blanc F, Bloom P, Chen S, Clark PJ, Ford WT, Nauenberg U, Olivas A, Rankin P, Smith JG, Zhang L, Chen A, Harton JL, Soffer A, Toki WH, Wilson RJ, Zeng QL, Altenburg D, Brandt T, Brose J, Colberg T, Dickopp M, Feltresi E, Hauke A, Lacker HM, Maly E, Müller-Pfefferkorn R, Nogowski R, Otto S, Petzold A, Schubert J, Schubert KR, Schwierz R, Spaan B, Sundermann JE, Bernard D, Bonneaud GR, Brochard F, Grenier P, Schrenk S, Thiebaux C, Vasileiadis G, Verderi M, Bard DJ, Khan A, Lavin D, Muheim F, Playfer S, Andreotti M, Azzolini V, Bettoni D, Bozzi C, Calabrese R, Cibinetto G, Luppi E, Negrini M, Sarti A, Treadwell E, Baldini-Ferroli R, Calcaterra A, de Sangro R, Finocchiaro G, Patteri P, Piccolo M, Zallo A, Buzzo A, Capra R, Contri R, Crosetti G, Lo Vetere M, Macri M, Monge MR, Passaggio S, Patrignani C, Robutti E, Santroni A, Tosi S, Bailey S, Brandenburg G, Morii M, Won E, Dubitzky RS, Langenegger U, Bhimji W, Bowerman DA, Dauncey PD, Egede U, Gaillard JR, Morton GW, Nash JA, Taylor GP, Grenier GJ, Mallik U, Cochran J, Crawley HB, Lamsa J, Meyer WT, Prell S, Rosenberg EI, Yi J, Davier M, Grosdidier G, Höcker A, Laplace S, Le Diberder F, Lepeltier V, Lutz AM, Petersen TC, Plaszczynski S, Schune MH, Tantot L, Wormser G, Cheng CH, Lange DJ, Simani MC, Wright DM, Bevan AJ, Coleman JP, Fry JR, Gabathuler E, Gamet R, Parry RJ, Payne DJ, Sloane RJ, Touramanis C, Back JJ, Harrison PF, Mohanty GB, Brown CL, Cowan G, Flack RL, Flaecher HU, Green MG, Marker CE, McMahon TR, Ricciardi S, Salvatore F, Vaitsas G, Winter MA, Brown D, Davis CL, Allison J, Barlow NR, Barlow RJ, Hart PA, Hodgkinson MC, Lafferty GD, Lyon AJ, Williams JC, Farbin A, Hulsbergen WD, Jawahery A, Kovalskyi D, Lae CK, Lillard V, Roberts DA, Blaylock G, Dallapiccola C, Flood KT, Hertzbach SS, Kofler R, Koptchev VB, Moore TB, Saremi S, Staengle H, Willocq S, Cowan R, Sciolla G, Taylor F, Yamamoto RK, Mangeol DJJ, Patel PM, Robertson SH, Lazzaro A, Palombo F, Bauer JM, Cremaldi L, Eschenburg V, Godang R, Kroeger R, Reidy J, Sanders DA, Summers DJ, Zhao HW, Brunet S, Côté D, Taras P, Nicholson H, Cavallo N, Fabozzi F, Gatto C, Lista L, Monorchio D, Paolucci P, Piccolo D, Sciacca C, Baak M, Bulten H, Raven G, Wilden L, Jessop CP, Losecco JM, Gabriel TA, Allmendinger T, Brau B, Gan KK, Honscheid K, Hufnagel D, Kagan H, Kass R, Pulliam T, Rahimi AM, Ter-Antonyan R, Wong QK, Brau J, Frey R, Igonkina O, Potter CT, Sinev NB, Strom D, Torrence E, Colecchia F, Dorigo A, Galeazzi F, Margoni M, Morandin M, Posocco M, Rotondo M, Simonetto F, Stroili R, Tiozzo G, Voci C, Benayoun M, Briand H, Chauveau J, David P, de la Vaissière C, Del Buono L, Hamon O, John MJJ, Leruste P, Ocariz J, Pivk M, Roos L, T'Jampens S, Therin G, Manfredi PF, Re V, Behera PK, Gladney L, Guo QH, Panetta J, Anulli F, Biasini M, Peruzzi IM, Pioppi M, Angelini C, Batignani G, Bettarini S, Bondioli M, Bucci F, Calderini G, Carpinelli M, Del Gamba V, Forti F, Giorgi MA, Lusiani A, Marchiori G, Martinez-Vidal F, Morganti M, Neri N, Paoloni E, Rama M, Rizzo G, Sandrelli F, Walsh J, Haire M, Judd D, Paick K, Wagoner DE, Danielson N, Elmer P, Lu C, Miftakov V, Olsen J, Smith AJS, Bellini F, Cavoto G, Faccini R, Ferrarotto F, Ferroni F, Gaspero M, Li Gioi L, Mazzoni MA, Morganti S, Pierini M, Piredda G, Safai Tehrani F, Voena C, Christ S, Wagner G, Waldi R, Adye T, De Groot N, Franek B, Geddes NI, Gopal GP, Olaiya EO, Aleksan R, Emery S, Gaidot A, Ganzhur SF, Giraud PF, Hamel de Monchenault G, Kozanecki W, Langer M, Legendre M, London GW, Mayer B, Schott G, Vasseur G, Yèche C, Zito M, Purohit MV, Weidemann AW, Yumiceva FX, Aston D, Bartoldus R, Berger N, Boyarski AM, Buchmueller OL, Convery MR, Cristinziani M, De Nardo G, Dong D, Dorfan J, Dujmic D, Dunwoodie W, Elsen EE, Fan S, Field RC, Glanzman T, Gowdy SJ, Hadig T, Halyo V, Hryn'ova T, Innes WR, Kelsey MH, Kim P, Kocian ML, Leith DWGS, Libby J, Luitz S, Luth V, Lynch HL, Marsiske H, Messner R, Muller DR, O'Grady CP, Ozcan VE, Perazzo A, Perl M, Petrak S, Ratcliff BN, Roodman A, Salnikov AA, Schindler RH, Schwiening J, Simi G, Snyder A, Soha A, Stelzer J, Su D, Sullivan MK, Va'vra J, Wagner SR, Weaver M, Weinstein AJR, Wisniewski WJ, Wittgen M, Wright DH, Yarritu AK, Young CC, Burchat PR, Edwards AJ, Meyer TI, Petersen BA, Roat C, Ahmed S, Alam MS, Ernst JA, Saeed MA, Saleem M, Wappler FR, Bugg W, Krishnamurthy M, Spanier SM, Eckmann R, Kim H, Ritchie JL, Satpathy A, Schwitters RF, Izen JM, Kitayama I, Lou XC, Ye S, Bianchi F, Bona M, Gallo F, Gamba D, Borean C, Bosisio L, Cartaro C, Cossutti F, Della Ricca G, Dittongo S, Grancagnolo S, Lanceri L, Poropat P, Vitale L, Vuagnin G, Panvini RS, Banerjee S, Brown CM, Fortin D, Jackson PD, Kowalewski R, Roney JM, Band HR, Dasu S, Datta M, Eichenbaum AM, Hollar JJ, Johnson JR, Kutter PE, Li H, Liu R, Di Lodovico F, Mihalyi A, Mohapatra AK, Pan Y, Prepost R, Sekula SJ, Tan P, von Wimmersperg-Toeller JH, Wu J, Wu SL, Yu Z, Neal H. Search for B+/--->[K(-/+)pi(+/-)](D)K+/- and upper limit on the b-->u amplitude in B+/--->DK+/-. Phys Rev Lett 2004; 93:131804. [PMID: 15524706 DOI: 10.1103/physrevlett.93.131804] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2004] [Indexed: 05/24/2023]
Abstract
We search for B+/--->[K(-/+)pi(+/-)](D)K+/- decays, where [K(-/+)pi(+/-)](D) indicates that the K-/+pi(+/-) pair originates from the decay of a D0 or D (0). Results are based on 120x10(6) Upsilon(4S)-->BB decays collected with the BABAR detector at SLAC. We set an upper limit on the ratio R(Kpi) identical with[Gamma(B+-->[K(-)pi(+)](D)K+)+Gamma(B--->[K(+)pi(-)](D)K-)][Gamma(B+-->[K(+)pi(-)](D) / K+)+Gamma(B--->[K(-)pi(+)](D)K-)]<0.026 (90% C.L.). This constrains the amplitude ratio r(B) identical with|A(B--->D 0K-)/A(B--->D0K-)|<0.22 (90% C.L.), consistent with expectations. The small value of r(B) favored by our analysis suggests that the determination of the Cabibbo-Kobayashi-Maskawa phase gamma from B-->DK will be difficult.
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Affiliation(s)
- B Aubert
- Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux, France
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Aubert B, Barate R, Boutigny D, Couderc F, Gaillard JM, Hicheur A, Karyotakis Y, Lees JP, Tisserand V, Zghiche A, Palano A, Pompili A, Chen JC, Qi ND, Rong G, Wang P, Zhu YS, Eigen G, Ofte I, Stugu B, Abrams GS, Borgland AW, Breon AB, Brown DN, Button-Shafer J, Cahn RN, Charles E, Day CT, Gill MS, Gritsan AV, Groysman Y, Jacobsen RG, Kadel RW, Kadyk J, Kerth LT, Kolomensky YG, Kukartsev G, Leclerc C, Lynch G, Merchant AM, Mir LM, Oddone PJ, Orimoto TJ, Pripstein M, Roe NA, Ronan MT, Shelkov VG, Telnov AV, Wenzel WA, Ford K, Harrison TJ, Hawkes CM, Morgan SE, Watson AT, Fritsch M, Goetzen K, Held T, Koch H, Lewandowski B, Pelizaeus M, Steinke M, Boyd JT, Chevalier N, Cottingham WN, Kelly MP, Latham TE, Wilson FF, Cuhadar-Donszelmann T, Hearty C, Mattison TS, McKenna JA, Thiessen D, Kyberd P, Teodorescu L, Blinov VE, Bukin AD, Druzhinin VP, Golubev VB, Ivanchenko VN, Kravchenko EA, Onuchin AP, Serednyakov SI, Skovpen YI, Solodov EP, Yushkov AN, Best D, Bruinsma M, Chao M, Eschrich I, Kirkby D, Lankford AJ, Mandelkern M, Mommsen RK, Roethel W, Stoker DP, Buchanan C, Hartfiel BL, Gary JW, Shen BC, Wang K, del Re D, Hadavand HK, Hill EJ, MacFarlane DB, Paar HP, Rahatlou S, Sharma V, Berryhill JW, Campagnari C, Dahmes B, Levy SL, Long O, Lu A, Mazur MA, Richman JD, Verkerke W, Beck TW, Eisner AM, Heusch CA, Lockman WS, Schalk T, Schmitz RE, Schumm BA, Seiden A, Spradlin P, Williams DC, Wilson MG, Albert J, Chen E, Dubois-Felsmann GP, Dvoretskii A, Hitlin DG, Narsky I, Piatenko T, Porter FC, Ryd A, Samuel A, Yang S, Jayatilleke S, Mancinelli G, Meadows BT, Sokoloff MD, Abe T, Blanc F, Bloom P, Chen S, Clark PJ, Ford WT, Nauenberg U, Olivas A, Rankin P, Smith JG, Zhang L, Chen A, Harton JL, Soffer A, Toki WH, Wilson RJ, Zeng QL, Altenburg D, Brandt T, Brose J, Colberg T, Dickopp M, Feltresi E, Hauke A, Lacker HM, Maly E, Müller-Pfefferkorn R, Nogowski R, Otto S, Petzold A, Schubert J, Schubert KR, Schwierz R, Spaan B, Sundermann JE, Bernard D, Bonneaud GR, Brochard F, Grenier P, Schrenk S, Thiebaux C, Vasileiadis G, Verderi M, Bard DJ, Khan A, Lavin D, Muheim F, Playfer S, Andreotti M, Azzolini V, Bettoni D, Bozzi C, Calabrese R, Cibinetto G, Luppi E, Negrini M, Piemontese L, Sarti A, Treadwell E, Baldini-Ferroli R, Calcaterra A, de Sangro R, Finocchiaro G, Patteri P, Piccolo M, Zallo A, Buzzo A, Capra R, Contri R, Crosetti G, Vetere ML, Macri M, Monge MR, Passaggio S, Patrignani C, Robutti E, Santroni A, Tosi S, Bailey S, Brandenburg G, Morii M, Won E, Dubitzky RS, Langenegger U, Bhimji W, Bowerman DA, Dauncey PD, Egede U, Gaillard JR, Morton GW, Nash JA, Taylor GP, Grenier GJ, Mallik U, Cochran J, Crawley HB, Lamsa J, Meyer WT, Prell S, Rosenberg EI, Yi J, Davier M, Grosdidier G, Höcker A, Laplace S, Diberder FL, Lepeltier V, Lutz AM, Petersen TC, Plaszczynski S, Schune MH, Tantot L, Wormser G, Cheng CH, Lange DJ, Simani MC, Wright DM, Bevan AJ, Coleman JP, Fry JR, Gabathuler E, Gamet R, Parry RJ, Payne DJ, Sloane RJ, Touramanis C, Back JJ, Cormack CM, Harrison PF, Mohanty GB, Brown CL, Cowan G, Flack RL, Flaecher HU, Green MG, Marker CE, McMahon TR, Ricciardi S, Salvatore F, Vaitsas G, Winter MA, Brown D, Davis CL, Allison J, Barlow NR, Barlow RJ, Hart PA, Hodgkinson MC, Lafferty GD, Lyon AJ, Williams JC, Farbin A, Hulsbergen WD, Jawahery A, Kovalskyi D, Lae CK, Lillard V, Roberts DA, Blaylock G, Dallapiccola C, Flood KT, Hertzbach SS, Kofler R, Koptchev VB, Moore TB, Saremi S, Staengle H, Willocq S, Cowan R, Sciolla G, Taylor F, Yamamoto RK, Mangeol DJJ, Patel PM, Robertson SH, Lazzaro A, Palombo F, Bauer JM, Cremaldi L, Eschenburg V, Godang R, Kroeger R, Reidy J, Sanders DA, Summers DJ, Zhao HW, Brunet S, Côté D, Taras P, Nicholson H, Cavallo N, Fabozzi F, Gatto C, Lista L, Monorchio D, Paolucci P, Piccolo D, Sciacca C, Baak M, Bulten H, Raven G, Wilden L, Jessop CP, Losecco JM, Gabriel TA, Allmendinger T, Brau B, Gan KK, Honscheid K, Hufnagel D, Kagan H, Kass R, Pulliam T, Rahimi AM, Ter-Antonyan R, Wong QK, Brau J, Frey R, Igonkina O, Potter CT, Sinev NB, Strom D, Torrence E, Colecchia F, Dorigo A, Galeazzi F, Margoni M, Morandin M, Posocco M, Rotondo M, Simonetto F, Stroili R, Tiozzo G, Voci C, Benayoun M, Briand H, Chauveau J, David P, de la Vaissière C, Del Buono L, Hamon O, John MJJ, Leruste P, Ocariz J, Pivk M, Roos L, T'jampens S, Therin G, Manfredi PF, Re V, Behera PK, Gladney L, Guo QH, Panetta J, Anulli F, Biasini M, Peruzzi IM, Pioppi M, Angelini C, Batignani G, Bettarini S, Bondioli M, Bucci F, Calderini G, Carpinelli M, Del Gamba V, Forti F, Giorgi MA, Lusiani A, Marchiori G, Martinez-Vidal F, Morganti M, Neri N, Paoloni E, Rama M, Rizzo G, Sandrelli F, Walsh J, Haire M, Judd D, Paick K, Wagoner DE, Danielson N, Elmer P, Lu C, Miftakov V, Olsen J, Smith AJS, Bellini F, Cavoto G, Faccini R, Ferrarotto F, Ferroni F, Gaspero M, Gioi LL, Mazzoni MA, Morganti S, Pierini M, Piredda G, Safai Tehrani F, Voena C, Christ S, Wagner G, Waldi R, Adye T, De Groot N, Franek B, Geddes NI, Gopal GP, Olaiya EO, Aleksan R, Emery S, Gaidot A, Ganzhur SF, Giraud PF, Hamel de Monchenault G, Kozanecki W, Langer M, Legendre M, London GW, Mayer B, Schott G, Vasseur G, Yèche C, Zito M, Purohit MV, Weidemann AW, Yumiceva FX, Aston D, Bartoldus R, Berger N, Boyarski AM, Buchmueller OL, Convery MR, Cristinziani M, Nardo GD, Dong D, Dorfan J, Dujmic D, Dunwoodie W, Elsen EE, Fan S, Field RC, Glanzman T, Gowdy SJ, Hadig T, Halyo V, Hast C, Hryn'ova T, Innes WR, Kelsey MH, Kim P, Kocian ML, Leith DWGS, Libby J, Luitz S, Luth V, Lynch HL, Marsiske H, Messner R, Muller DR, O'Grady CP, Ozcan VE, Perazzo A, Perl M, Petrak S, Ratcliff BN, Roodman A, Salnikov AA, Schindler RH, Schwiening J, Simi G, Snyder A, Soha A, Stelzer J, Su D, Sullivan MK, Va'vra J, Wagner SR, Weaver M, Weinstein AJR, Wisniewski WJ, Wittgen M, Wright DH, Yarritu AK, Young CC, Burchat PR, Edwards AJ, Meyer TI, Petersen BA, Roat C, Ahmed S, Alam MS, Ernst JA, Saeed MA, Saleem M, Wappler FR, Bugg W, Krishnamurthy M, Spanier SM, Eckmann R, Kim H, Ritchie JL, Satpathy A, Schwitters RF, Izen JM, Kitayama I, Lou XC, Ye S, Bianchi F, Bona M, Gallo F, Gamba D, Borean C, Bosisio L, Cartaro C, Cossutti F, Della Ricca G, Dittongo S, Grancagnolo S, Lanceri L, Poropat P, Vitale L, Vuagnin G, Panvini RS, Banerjee S, Brown CM, Fortin D, Jackson PD, Kowalewski R, Roney JM, Band HR, Dasu S, Datta M, Eichenbaum AM, Hollar JJ, Johnson JR, Kutter PE, Li H, Liu R, Lodovico FD, Mihalyi A, Mohapatra AK, Pan Y, Prepost R, Sekula SJ, Tan P, von Wimmersperg-Toeller JH, Wu J, Wu SL, Yu Z, Neal H. Measurements of CP-violating asymmetries in B0-->K(0)(s)pi(0) decays. Phys Rev Lett 2004; 93:131805. [PMID: 15524707 DOI: 10.1103/physrevlett.93.131805] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2004] [Indexed: 05/24/2023]
Abstract
We present a measurement of the time-dependent CP-violating (CPV) asymmetries in B0-->K(0)(S)pi(0) decays based on 124x10(6) Upsilon(4S)-->BB decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. In a sample containing 122+/-16 signal decays, we obtain the magnitudes of the direct CPV asymmetry CK(0)(S)(pi(0))=0.40(+0.27)(-0.28)+/-0.09 and of the CPV asymmetry in the interference between mixing and decay SK(0)(S)(pi(0))=0.48(+0.38)(-0.47)+/-0.06 where the first error is statistical and the second systematic.
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Affiliation(s)
- B Aubert
- Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux, France
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Doucet ME, Guillemot JP, Lassonde M, Gagné JP, Leclerc C, Lepore F. Blind subjects process auditory spectral cues more efficiently than sighted individuals. Exp Brain Res 2004; 160:194-202. [PMID: 15309355 DOI: 10.1007/s00221-004-2000-4] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2003] [Accepted: 05/23/2004] [Indexed: 10/26/2022]
Abstract
The goal of the present study was to investigate how monaural sound localization on the horizontal plane in blind humans is affected by manipulating spectral cues. As reported in a previous study (Lessard et al. 1998), blind subjects are able to calibrate their auditory space despite their congenital lack of vision. Moreover, the performance level of half of the blind subjects was superior to that of sighted subjects under monaural listening conditions. Here, we first tested ten blind subjects and five controls in free-field (1) binaural and (2) monaural sound localization tasks. Results showed that, contrary to controls and half the blind subjects, five of the blind listeners were able to localize the sounds with one ear blocked. The blind subjects who showed good monaural localization performances were then re-tested in three additional monaural tasks, but we manipulated their ability to use spectral cues to carry out their discrimination. These subjects thus localized these same sounds: (3) with acoustical paste on the pinna, (4) with high-pass sounds and unobstructed pinna and (5) with low-pass sounds and unobstructed pinna. A significant increase in localization errors was observed when their ability to use spectral cues was altered. We conclude that one of the reasons why some blind subjects show supra-normal performances might be that they more effectively utilize auditory spectral cues.
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Affiliation(s)
- M-E Doucet
- Centre de Recherche en Neuropsychologie et Cognition, Université de Montréal, C.P. 6128, Succ. Centre-Ville, H3C 3J7, Montréal, Qué., Canada
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Leclerc C, Rouaud J, Haond P, Bottet P, Bonnamy C. [Ropivacaine acute toxicity: when local anaesthasia must be stopped?]. Ann Fr Anesth Reanim 2004; 23:661-2. [PMID: 15234742 DOI: 10.1016/j.annfar.2004.03.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/30/2023]
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Leclerc C, Haond P, Rouaud J. [Unknown profound consequence of previous intubation]. Ann Fr Anesth Reanim 2004; 23:439-40. [PMID: 15120797 DOI: 10.1016/j.annfar.2003.12.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
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Rueda P, Morón G, Sarraseca J, Leclerc C, Casal JI. Influence of flanking sequences on presentation efficiency of a CD8+ cytotoxic T-cell epitope delivered by parvovirus-like particles. J Gen Virol 2004; 85:563-572. [PMID: 14993639 DOI: 10.1099/vir.0.19525-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
We have previously developed an antigen-delivery system based on hybrid recombinant porcine parvovirus-like particles (PPV-VLPs) formed by the self-assembly of the VP2 protein of PPV carrying a foreign epitope at its N terminus. In this study, different constructs were made containing a CD8(+) T-cell epitope of chicken ovalbumin (OVA) to analyse the influence of the sequence inserted into VP2 on the correct processing of VLPs by antigen-presenting cells. We analysed the presentation of the OVA epitope inserted without flanking sequences or with either different natural flanking sequences or with the natural flanking sequences of a CD8(+) T-cell epitope from the lymphocytic choriomeningitis virus nucleoprotein, and as a dimer with or without linker sequences. All constructs were studied in terms of level of expression, assembly of VLPs and ability to deliver the inserted epitope into the MHC I pathway. The presentation of the OVA epitope was considerably improved by insertion of short natural flanking sequences, which indicated the relevance of the flanking sequences on the processing of PPV-VLPs. Only PPV-VLPs carrying two copies of the OVA epitope linked by two glycines were able to be properly processed, suggesting that the introduction of flexible residues between the two consecutive OVA epitopes may be necessary for the correct presentation of these dimers by PPV-VLPs. These results provide information to improve the insertion of epitopes into PPV-VLPs to facilitate their processing and presentation by MHC class I molecules.
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Affiliation(s)
- P Rueda
- Inmunología y Genética Aplicada SA (INGENASA), C/Hnos García Noblejas 41, 28037 Madrid, Spain
| | - G Morón
- Unité de Biologie des Régulations Immunitaires, INSERM E 352, Institut Pasteur, 25 rue du Docteur Roux, 75724 Paris CEDEX 15, France
| | - J Sarraseca
- Inmunología y Genética Aplicada SA (INGENASA), C/Hnos García Noblejas 41, 28037 Madrid, Spain
| | - C Leclerc
- Unité de Biologie des Régulations Immunitaires, INSERM E 352, Institut Pasteur, 25 rue du Docteur Roux, 75724 Paris CEDEX 15, France
| | - J I Casal
- Inmunología y Genética Aplicada SA (INGENASA), C/Hnos García Noblejas 41, 28037 Madrid, Spain
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Benech-Kieffer F, Meuling WJA, Leclerc C, Roza L, Leclaire J, Nohynek G. Percutaneous absorption of Mexoryl SX in human volunteers: comparison with in vitro data. Skin Pharmacol Physiol 2004; 16:343-55. [PMID: 14528058 DOI: 10.1159/000072929] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2002] [Indexed: 11/19/2022]
Abstract
The potential human health risk of UV filters depends on their toxicity and the human systemic exposure which is a function of the extent of percutaneous absorption of the topically applied substance into the human organism. Using a 'mass balance' approach, a study was designed to investigate the systemically absorbed dose of [(14)C]-Mexoryl SX((R)) in humans after topical application of a typical sunscreen emulsion. In addition, to assess the correlation with in vitro experiments, the percutaneous absorption of this UVA filter through isolated human skin was measured under identical exposure conditions. When applied in vivo for a period of 4 h, 89-94% of the applied radioactivity was recovered from the wash-off samples. In urine samples, the radioactivity slightly exceeded background levels and corresponded maximally to 0.014% of the topically applied dose. No radioactivity was measured in blood or faeces sampled up to 120 h after application. In vitro, 24 h after a 4-hour application, [(14)C]-Mexoryl SX remained primarily on the skin surface. The mean in vitro absorption over 24 h, adding up the amounts found in the dermis and receptor fluid, was 0.16% of the applied dose. It is concluded from the in vivo pharmacokinetic results that the systemically absorbed dose of [(14)C]-Mexoryl SX is less than 0.1%. The order of magnitude of this value correlates well with the corresponding in vitro data which overestimate the in vivo results as previously observed with other hydrophilic compounds. This study demonstrates that, under realistic exposure conditions, the human systemic exposure to this UVA filter is negligible and poses no risk to human health.
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Affiliation(s)
- F Benech-Kieffer
- Recherche, L'Oréal, Advanced Researched Life Sciences, Aulnay-sous-Bois, France.
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Leclerc C, Soulard D, Rouaud J, Haond P. Endoscopie digestive haute pédiatrique avec masque laryngé. Annales Françaises d'Anesthésie et de Réanimation 2003; 22:741. [PMID: 14522398 DOI: 10.1016/s0750-7658(03)00321-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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49
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Vichier-Guerre S, Lo-Man R, BenMohamed L, Dériaud E, Kovats S, Leclerc C, Bay S. Induction of carbohydrate-specific antibodies in HLA-DR transgenic mice by a synthetic glycopeptide: a potential anti cancer vaccine for human use. J Pept Res 2003; 62:117-24. [PMID: 12895273 DOI: 10.1034/j.1399-3011.2003.00074.x] [Citation(s) in RCA: 39] [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] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Over the last few years, anticancer immunotherapy has emerged as a new exciting area for controlling tumors. In particular, vaccination using synthetic tumor-associated antigens (TAA), such as carbohydrate antigens hold promise for generating a specific antitumor response by targeting the immune system to cancer cells. However, development of synthetic vaccines for human use is hampered by the extreme polymorphism of human leukocyte-associated antigens (HLA). In order to stimulate a T-cell dependent anticarbohydrate response, and to bypass the HLA polymorphism of the human population, we designed and synthesized a glycopeptide vaccine containing a cluster of a carbohydrate TAA B-cell epitope (Tn antigen: alpha-GalNAc-Ser) covalently linked to peptides corresponding to the Pan DR 'universal' T-helper epitope (PADRE) and to a cytotoxic T lymphocyte (CTL) epitope from the carcinoembryonic antigen (CEA). The immunogenicity of the construct was evaluated in outbred mice as well as in HLA transgenic mice (HLA-DR1, and HLA-DR4). A strong T-cell dependent antibody response specific for the Tn antigen was elicited in both outbred and HLA transgenic mice. The antibodies induced by the glycopeptide construct efficiently recognized a human tumor cell line underlying the biological relevance of the response. The rational design and synthesis of the glycopeptide construct presented herein, together with its efficacy to induce antibodies specific for native tumor carbohydrate antigens, demonstrate the potential of a such synthetic molecule as an anticancer vaccine candidate for human use.
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MESH Headings
- Animals
- Antibodies, Neoplasm/biosynthesis
- Antibody-Dependent Cell Cytotoxicity
- Antigens, Tumor-Associated, Carbohydrate/immunology
- Cancer Vaccines/therapeutic use
- Carcinoembryonic Antigen/immunology
- Epitopes, B-Lymphocyte/chemistry
- Epitopes, B-Lymphocyte/immunology
- Female
- Glycopeptides/chemical synthesis
- Glycopeptides/therapeutic use
- HLA-DR Antigens
- Humans
- Jurkat Cells
- Mice
- Mice, Transgenic
- T-Lymphocytes, Cytotoxic/chemistry
- T-Lymphocytes, Cytotoxic/immunology
- T-Lymphocytes, Helper-Inducer/chemistry
- T-Lymphocytes, Helper-Inducer/immunology
- Vaccines, Synthetic/therapeutic use
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Affiliation(s)
- S Vichier-Guerre
- Unité de Chimie Organique URA CNRS 2128, Institut Pasteur, Paris, France
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50
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Tissier M, Daussac E, Leclerc C, Valdiguié M, Fehri T, Pattier J. P95 Urgences — Réanimation Regulation des appels pediatriques aupres du 15 en haute garonne. Arch Pediatr 2003. [DOI: 10.1016/s0929-693x(03)90607-5] [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: 10/26/2022]
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