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Thoraval L, Thiébault E, Siboni R, Moniot A, Guillaume C, Jacobs A, Nedelec JM, Renaudin G, Descamps S, Valfort O, Gangloff S, Braux J, Marchat D, Velard F. The acute inflammatory response to copper(II)-doped biphasic calcium phosphates. Mater Today Bio 2023; 23:100814. [PMID: 37841800 PMCID: PMC10568289 DOI: 10.1016/j.mtbio.2023.100814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 09/05/2023] [Accepted: 09/22/2023] [Indexed: 10/17/2023] Open
Abstract
Infection and inflammation are two key features to consider to avoid septic or aseptic loosening of bone-implanted biomaterials. In this context, various approaches to fine-tune the biomaterial's properties have been studied in order to modulate the crosstalk between immune and skeletal cells. Cation-doping strategies for tuning of calcium phosphates properties has been evidenced as a promising way to control the biomaterial-induced inflammatory process, and thus improving their osteoimmunomodulatory properties. Copper(II) ions are recognized for their antibacterial potential, but the literature on their impact on particulate material-induced acute inflammation is scarce. We synthesized copper(II) ions-doped biphasic calcium phosphate (BCP), intended to exhibit osteoimmunomodulatory properties. We addressed in vitro, for the first time, the inflammatory response of human primary polymorphonuclear neutrophils (PMNs) to copper(II) ions-doped or undoped (BCP) powders, synthesized by an original and robust wet method, in the presence or absence of LPS as a costimulant to mimic an infectious environment. ELISA and zymography allowed us to evidence, in vitro, a specific increase in IL-8 and GRO-α secretion but not MIP-1β, TNF-α, or MMP-9, by PMNs. To assess in vivo relevance of these findings, we used a mouse air pouch model. Thanks to flow cytometry analysis, we highlighted an increased PMN recruitment with the copper(II) ions-doped samples compared to undoped samples. The immunomodulatory effect of copper(II) ions-doped BCP powders and the consequent induced moderate level of inflammation may promote bacterial clearance by PMNs in addition to the antimicrobial potential of the material. Copper(II) doping provides new insights into calcium phosphate (CaP)-based biomaterials for prosthesis coating or bone reconstruction by effectively modulating the inflammatory environment.
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Affiliation(s)
- L. Thoraval
- Université de Reims Champagne-Ardenne, EA4691 “Biomatériaux et Inflammation en site osseux” BIOS, Reims, France
| | - E. Thiébault
- Université de Reims Champagne-Ardenne, EA4691 “Biomatériaux et Inflammation en site osseux” BIOS, Reims, France
| | - R. Siboni
- Université de Reims Champagne-Ardenne, EA4691 “Biomatériaux et Inflammation en site osseux” BIOS, Reims, France
| | - A. Moniot
- Université de Reims Champagne-Ardenne, EA4691 “Biomatériaux et Inflammation en site osseux” BIOS, Reims, France
| | - C. Guillaume
- Université de Reims Champagne-Ardenne, EA4691 “Biomatériaux et Inflammation en site osseux” BIOS, Reims, France
| | - A. Jacobs
- Université Clermont Auvergne, CNRS, Clermont Auvergne INP, ICCF, Clermont-Ferrand, France
| | - J.-M. Nedelec
- Université Clermont Auvergne, CNRS, Clermont Auvergne INP, ICCF, Clermont-Ferrand, France
| | - G. Renaudin
- Université Clermont Auvergne, CNRS, Clermont Auvergne INP, ICCF, Clermont-Ferrand, France
| | - S. Descamps
- Université Clermont Auvergne, CNRS, Clermont Auvergne INP, ICCF, Clermont-Ferrand, France
| | - O. Valfort
- Mines Saint-Etienne, Univ Lyon, CNRS, UMR 5307 LGF, Centre SPIN, F-42023, Saint-Etienne, France
| | - S.C. Gangloff
- Université de Reims Champagne-Ardenne, EA4691 “Biomatériaux et Inflammation en site osseux” BIOS, Reims, France
| | - J. Braux
- Université de Reims Champagne-Ardenne, EA4691 “Biomatériaux et Inflammation en site osseux” BIOS, Reims, France
| | - D. Marchat
- Mines Saint-Etienne, Univ Jean Monnet, Etablissement Français du Sang, INSERM, U 1059 Sainbiose, 42023, Saint-Etienne, France
| | - F. Velard
- Université de Reims Champagne-Ardenne, EA4691 “Biomatériaux et Inflammation en site osseux” BIOS, Reims, France
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Guillaume C, Saguin E, Peroux E, Balcerac A, Ricard D. Anti-AK5 encephalitis: subacute anterograde amnesia is not the only clinical presentation. Acta Neurol Belg 2023; 123:299-301. [PMID: 35040073 DOI: 10.1007/s13760-021-01853-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Accepted: 12/12/2021] [Indexed: 11/01/2022]
Affiliation(s)
- C Guillaume
- Service de Psychiatrie, Hôpital d'Instruction des Armées Bégin, Service de Santé des Armées, Saint-Mandé, France
| | - E Saguin
- Service de Psychiatrie, Hôpital d'Instruction des Armées Bégin, Service de Santé des Armées, Saint-Mandé, France.
- VIFASOM (Vigilance Fatigue Sommeil et Santé Publique) EA 7330, Université de Paris, 75005, Paris, France.
| | - E Peroux
- Service de Radiologie, Hôpital d'Instruction des Armées Bégin, Service de Santé des Armées, Saint-Mandé, France
| | - A Balcerac
- Service de Neurologie, Hôpital d'Instruction des Armées Percy, Service de Santé des Armées, Clamart, France
| | - D Ricard
- Service de Neurologie, Hôpital d'Instruction des Armées Percy, Service de Santé des Armées, Clamart, France
- UMR 9010 Centre Borelli, Ecole Normale Supérieure Paris-Saclay, CNRS, Service de Santé des Armées, Université Paris-Saclay, Université Paris-Descartes, INSERM, Paris, France
- Ecole du Val-de-Grâce, Service de Santé des Armées, Paris, France
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Vinci D, Lüders U, Guillaume C, Lemrhari M, Le Cornec F, Chateigner D. Structure, texture and residual strain in Al/W/Al heterostructures. Acta Cryst Sect A 2022. [DOI: 10.1107/s2053273322092233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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Moiny-Fouquet M, Guillaume C, Berlengi N, Lapp L, Watelet C, Borsa-Dorion A, Bernard Y, Baumann C, Luc A, Schweitzer C, Leheup B, Bursztejn AC. Dermatological opinions are imperative in ambulatory and acute care settings for pediatric skin disorders - HL-SkinPed. Arch Pediatr 2021; 28:417-421. [PMID: 33994265 DOI: 10.1016/j.arcped.2021.04.010] [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: 01/30/2020] [Revised: 12/15/2020] [Accepted: 04/16/2021] [Indexed: 10/21/2022]
Abstract
BACKGROUND Children with skin disorders usually receive care from a pediatrician, despite their limited training in this discipline. The advice of a dermatologist is frequently requested. OBJECTIVES To estimate the degree of concordance in the diagnosis, treatment, advice, and recommended follow-up of skin disorders between pediatricians (in private practice or a pediatric emergency department [PED]) and a dermatologist. METHODS This prospective study was carried out between June 25 and September 13, 2018. All patients younger than 18 years consulting at the PED of the University Children's Hospital or a pediatric private practice in Nancy, France, for a dermatological disorder (primary complaint) were included. Photographs, medical data, diagnosis, treatment, advice and follow-up recommended by the pediatricians were recorded in a dedicated anonymous medical file. Clinical data and photographs were subsequently reviewed by a dermatologist who provided a diagnosis. RESULTS A total of 103 patients were included and 99 were analyzed: 53 from the PED and 46 from private practice (three patients were excluded because of unclear photographs and one was referred for maxillofacial advice). The median age was 4 years and there was a slight predominance of females (53.5%). The seven main diagnoses were: atopic dermatitis, insect bites, nonspecific viral rash, viral urticaria, hand-foot-and-mouth disease, impetigo, and contact dermatitis. The rate of agreement between the pediatricians and the dermatologist was 55% for diagnosis (73% for atopic dermatitis, 53% for insect bites, 33% for nonspecific viral rash), 40% for treatment, 54% for advice, and 58% for recommended follow-up. Reinterpretation by the dermatologist changed patient management in 15% of cases. CONCLUSIONS The significant discordance between the pediatricians and the dermatologist suggests the need for a greater emphasis on dermatological disorders in medical training programs and for closer collaboration between disciplines for the benefit of younger patients.
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Affiliation(s)
| | - Claire Guillaume
- Independent Pediatric Practice of Dr. Lapp/Guillaume/Watelet, Vandoeuvre-lès-Nancy, France
| | - Noémie Berlengi
- Pediatric Emergency Department, CHRU, Vandoeuvre-lès-Nancy, France
| | - Lucie Lapp
- Independent Pediatric Practice of Dr. Lapp/Guillaume/Watelet, Vandoeuvre-lès-Nancy, France
| | - Claire Watelet
- Independent Pediatric Practice of Dr. Lapp/Guillaume/Watelet, Vandoeuvre-lès-Nancy, France
| | | | - Yohann Bernard
- DRI Research and Innovation Unit, CHRU, Vandoeuvre-lès-Nancy, France
| | - Cédric Baumann
- Methodology, Data Management and Statistics Unit, DRCI, CHRU, Vandoeuvre-lès-Nancy, France
| | - Amandine Luc
- Methodology, Data Management and Statistics Unit, DRCI, CHRU, Vandoeuvre-lès-Nancy, France
| | | | - Bruno Leheup
- University Children's Hospital, Vandoeuvre-lès-Nancy, France
| | - Anne-Claire Bursztejn
- Department of Dermatology, Regional University Hospital (CHRU), 5, rue du Morvan, 54500 Vandoeuvre-lès-Nancy, France.
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Courtellemont L, Guinard J, Guillaume C, Giaché S, Rzepecki V, Seve A, Gubavu C, Baud K, Le Helloco C, Cassuto GN, Pialoux G, Hocqueloux L, Prazuck T. High performance of a novel antigen detection test on nasopharyngeal specimens for diagnosing SARS-CoV-2 infection. J Med Virol 2021; 93:3152-3157. [PMID: 33615487 PMCID: PMC8014580 DOI: 10.1002/jmv.26896] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 02/07/2021] [Accepted: 02/11/2021] [Indexed: 12/17/2022]
Abstract
The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic has become a major public health issue worldwide. Developing and evaluating rapid and easy-to-perform diagnostic tests is a high priority. The current study was designed to assess the diagnostic performance of an antigen-based rapid detection test (COVID-VIRO®) in a real-life setting. Two nasopharyngeal specimens of symptomatic or asymptomatic adult patients hospitalized in the Infectious Diseases Department or voluntarily accessing the COVID-19 Screening Department of the Regional Hospital of Orléans, France, were concurrently collected. The diagnostic specificity and sensitivity of COVID VIRO® results were compared to those of real-time reverse-transcriptase quantitative polymerase chain reaction (RT-qPCR) results. A subset of patients underwent an additional oropharyngeal and/or saliva swab for rapid testing. A total of 121 patients confirmed to be infected and 127 patients having no evidence of recent or ongoing infection were enrolled for a total of 248 nasopharyngeal swab specimens. Overall, the COVID-VIRO® sensitivity was 96.7% (CI, 93.5%-99.9%). In asymptomatic patients, symptomatic patients having symptoms for more than 4 days and those with an RT-qPCR cycle threshold value ≥ 32, the sensitivities were 100%, 95.8%, and 91.9%, respectively. The concordance between RT-qPCR and COVID VIRO® rapid test results was 100% for the 127 patients with no SARS-CoV-2 infection. The COVID-VIRO® test had 100% specificity and sensitivity greater than 95%, which are better than the recommendations set forth by the WHO (specificity ≥ 97%-100%, sensitivity ≥ 80%). These rapid tests may be particularly useful for large-scale screening in emergency departments, low-resource settings, and airports.
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Affiliation(s)
| | - J Guinard
- Department of Virology, CHR Orléans, Orléans, France
| | - C Guillaume
- Department of Virology, CHR Orléans, Orléans, France
| | - S Giaché
- Department of Infectious and Tropical Diseases, CHR Orleans, Orléans, France
| | - V Rzepecki
- Department of Infectious and Tropical Diseases, CHR Orleans, Orléans, France
| | - A Seve
- Department of Infectious and Tropical Diseases, CHR Orleans, Orléans, France
| | - C Gubavu
- Department of Infectious and Tropical Diseases, CHR Orleans, Orléans, France
| | - K Baud
- Department of Infectious and Tropical Diseases, CHR Orleans, Orléans, France
| | - C Le Helloco
- Department of Infectious and Tropical Diseases, CHR Orleans, Orléans, France
| | | | - G Pialoux
- Department of Infectious and Tropical Diseases, CHU Tenon, Sorbonne University, Paris, France
| | - L Hocqueloux
- Department of Infectious and Tropical Diseases, CHR Orleans, Orléans, France
| | - T Prazuck
- Department of Infectious and Tropical Diseases, CHR Orleans, Orléans, France
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Frieiro JL, Guillaume C, López-Vidrier J, Blázquez O, González-Torres S, Labbé C, Hernández S, Portier X, Garrido B. Toward RGB LEDs based on rare earth-doped ZnO. Nanotechnology 2020; 31:465207. [PMID: 32877372 DOI: 10.1088/1361-6528/abadc9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
By using ZnO thin films doped with Ce, Tb or Eu, deposited via radiofrequency magnetron sputtering, we have developed monochromatic (blue, green and red, respectively) light emitting devices (LEDs). The rare earth ions introduced with doping rates lower than 2% exhibit narrow and intense emission peaks due to electronic transitions in relaxation processes induced after electrical excitation. This study proves zinc oxide to be a good host for these elements, its high conductivity and optical transparency in the visible range being as well exploited as top transparent electrode. After structural characterization of the different doped layers, a device structure with intense electroluminescence is presented, modeled, and electrically and optically characterized. The different emission spectra obtained are compared in a chromatic diagram, providing a reference for future works with similar devices. The results hereby presented demonstrate three operating monochromatic LEDs, as well as a combination of the three species into another one, with a simply-designed structure compatible with current Si technology and demonstrating an integrated red-green-blue emission.
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Affiliation(s)
- J L Frieiro
- MIND, Departament d'Enginyeria Electrònica i Biomèdica, Universitat de Barcelona, Martí i Franquès 1, 08028, Barcelona, Spain. Institute of Nanoscience and Nanotechnology (IN²UB), Universitat de Barcelona, Barcelona 08028, Spain
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Tappert LK, Baldit A, Guillaume C, Velard F, Lipinski P. Identification of macro-heterogenous mechanical behaviour of temporomandibular joint disc. Comput Methods Biomech Biomed Engin 2020. [DOI: 10.1080/10255842.2020.1816295] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- L. K. Tappert
- Université de Lorraine, CNRS, Arts et Métiers ParisTech, Metz, France
| | - A. Baldit
- Université de Lorraine, CNRS, Arts et Métiers ParisTech, Metz, France
- ENIM, Université de Lorraine, Metz, France
| | - C Guillaume
- «Biomatériaux et Inflammation en Site Osseux» (BIOS), Université de Reims Champagne Ardenne (URCA), Reims, EA, France
| | - F Velard
- «Biomatériaux et Inflammation en Site Osseux» (BIOS), Université de Reims Champagne Ardenne (URCA), Reims, EA, France
| | - P. Lipinski
- Université de Lorraine, CNRS, Arts et Métiers ParisTech, Metz, France
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Sergheraert J, Jourdain ML, Guillaume C, Braux J, Mauprivez C, Audonnet S, Hubert D, Jacquot J, Velard F. P260 Elevated circulating sphingosine 1-phosphate in CFTR-F508del patients: a new biomarker leading to cystic fibrosis-related bone disease? J Cyst Fibros 2020. [DOI: 10.1016/s1569-1993(20)30592-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Courtellemont L, Guinard J, Bret L, Guillaume C, Hocqueloux L, Prazuck T. Le troisième tubage gastrique/expectoration pour le diagnostic de tuberculose pulmonaire est-il réellement nécessaire ? Med Mal Infect 2019. [DOI: 10.1016/j.medmal.2019.04.088] [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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Courtellemont L, Boutrot M, Kourta M, Guinard J, Bret L, Guillaume C, Guigon A. Diversité des isolements bactériologiques de Pasteurella hors contexte de morsure. Med Mal Infect 2018. [DOI: 10.1016/j.medmal.2018.04.111] [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: 10/14/2022]
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Acerbi F, Guillard V, Saubanere M, Guillaume C, Gontard N. Modelling CO2 transfer in foil ripened semi-hard Swiss-type cheese. J FOOD ENG 2018. [DOI: 10.1016/j.jfoodeng.2017.10.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Desoubeaux G, Bailly É, Guillaume C, De Kyvon MA, Tellier AC, Morange V, Bernard L, Salamé E, Quentin R, Chandenier J. Candida auris in contemporary mycology labs: A few practical tricks to identify it reliably according to one recent French experience. J Mycol Med 2018; 28:407-410. [PMID: 29567284 DOI: 10.1016/j.mycmed.2018.02.011] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 02/21/2018] [Accepted: 02/24/2018] [Indexed: 11/17/2022]
Affiliation(s)
- G Desoubeaux
- Service de parasitologie, mycologie, médecine tropicale, pôle de biologie médicale, hôpital Bretonneau, CHU de Tours, 1(er) étage du Bâtiment B2A, 2, boulevard Tonnellé, 37044 Tours, France.
| | - É Bailly
- Service de parasitologie, mycologie, médecine tropicale, pôle de biologie médicale, hôpital Bretonneau, CHU de Tours, 1(er) étage du Bâtiment B2A, 2, boulevard Tonnellé, 37044 Tours, France
| | - C Guillaume
- Service de parasitologie, mycologie, médecine tropicale, pôle de biologie médicale, hôpital Bretonneau, CHU de Tours, 1(er) étage du Bâtiment B2A, 2, boulevard Tonnellé, 37044 Tours, France
| | - M-A De Kyvon
- Service de parasitologie, mycologie, médecine tropicale, pôle de biologie médicale, hôpital Bretonneau, CHU de Tours, 1(er) étage du Bâtiment B2A, 2, boulevard Tonnellé, 37044 Tours, France
| | - A-C Tellier
- Réanimation chirurgicale, CHU de Tours, 37044 Tours, France
| | - V Morange
- Equipe opérationnelle d'hygiène, CHU de Tours, 37044 Tours, France
| | - L Bernard
- Médecine interne & maladie infectieuse, CHU de Tours, 37044 Tours, France
| | - E Salamé
- Transplantation hépatique, CHU de Tours, 37044 Tours, France
| | - R Quentin
- Equipe opérationnelle d'hygiène, CHU de Tours, 37044 Tours, France; Comité de lutte contre les infections nosocomiales, CHU de Tours, 37044 Tours, France
| | - J Chandenier
- Service de parasitologie, mycologie, médecine tropicale, pôle de biologie médicale, hôpital Bretonneau, CHU de Tours, 1(er) étage du Bâtiment B2A, 2, boulevard Tonnellé, 37044 Tours, France
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Ehsani JP, Haynie D, Ouimet MC, Zhu C, Guillaume C, Klauer SG, Dingus T, Simons-Morton BG. Teen drivers' awareness of vehicle instrumentation in naturalistic research. J Safety Res 2017; 63:127-134. [PMID: 29203010 PMCID: PMC5728669 DOI: 10.1016/j.jsr.2017.10.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 05/19/2017] [Accepted: 10/09/2017] [Indexed: 06/07/2023]
Abstract
INTRODUCTION Naturalistic driving methods require the installation of instruments and cameras in vehicles to record driving behavior. A critical, yet unexamined issue in naturalistic driving research is the extent to which the vehicle instruments and cameras used for naturalistic methods change human behavior. We sought to describe the degree to which teenage participants' self-reported awareness of vehicle instrumentation changes over time, and whether that awareness was associated with driving behaviors. METHOD Forty-two newly-licensed teenage drivers participated in an 18-month naturalistic driving study. Data on driving behaviors including crash/near-crashes and elevated gravitational force (g-force) events rates were collected over the study period. At the end of the study, participants were asked to rate the extent to which they were aware of instruments in the vehicle at four time points. They were also asked to describe their own and their passengers' perceptions of the instrumentation in the vehicle during an in-depth interview. The number of critical event button presses was used as a secondary measure of camera awareness. The association between self-reported awareness of the instrumentation and objectively measured driving behaviors was tested using correlations and linear mixed models. RESULTS Most participants' reported that their awareness of vehicle instrumentation declined across the duration of the 18-month study. Their awareness increased in response to their passengers' concerns about the cameras or if they were involved in a crash. The number of the critical event button presses was initially high and declined rapidly. There was no correlation between driver's awareness of instrumentation and their crash and near-crash rate or elevated g-force events rate. CONCLUSION Awareness was not associated with crash and near-crash rates or elevated g-force event rates, consistent with having no effect on this measure of driving performance. PRACTICAL APPLICATIONS Naturalistic driving studies are likely to yield valid measurements of driving behavior.
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Affiliation(s)
- J P Ehsani
- Center for Injury Research and Policy, Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, United States.
| | - D Haynie
- Health Behavior Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, United States
| | | | - C Zhu
- Health Behavior Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, United States
| | - C Guillaume
- Health Behavior Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, United States
| | - S G Klauer
- Virginia Tech Transportation Institute, United States
| | - T Dingus
- Virginia Tech Transportation Institute, United States
| | - B G Simons-Morton
- Health Behavior Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, United States
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Jourdain ML, Abdallah D, Guillaume C, Le Pimpec-Barthes F, Gangloff S, Sermet-Gaudelus I, Jacquot J, Velard F. 39 Is sphingosine 1-phosphate pathway involved in bone disease development in cystic fibrosis? J Cyst Fibros 2017. [DOI: 10.1016/s1569-1993(17)30404-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Delion M, Velard F, Guillaume C, Gangloff S, Pimpec-Barthes FL, Sermet-Gaudelus I, Jacquot J. 21 Cystic fibrosis bone disease: an increased RANK-L-to-OPG ratio in human osteoblasts with the F508del mutation in CFTR. J Cyst Fibros 2016. [DOI: 10.1016/s1569-1993(16)30261-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Velard F, Delion M, Tabary O, Guillaume C, Sermet-Gaudelus I, Pimpec-Barthes FL, Ingersoll S, Gangloff S, Tirouvanziam R, Jacquot J. WS06.5 New insights into the pathogenesis and potential therapies of cystic fibrosis (CF) bone disease. J Cyst Fibros 2016. [DOI: 10.1016/s1569-1993(16)30094-7] [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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Acerbi F, Guillard V, Guillaume C, Gontard N. Assessment of gas permeability of the whole packaging system mimicking industrial conditions. Food Packag Shelf Life 2016. [DOI: 10.1016/j.fpsl.2016.04.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Acerbi F, Guillard V, Aliani M, Guillaume C, Gontard N. Impact of salt concentration, ripening temperature and ripening time on CO 2 production of semi-hard cheese with propionic acid fermentation. J FOOD ENG 2016. [DOI: 10.1016/j.jfoodeng.2015.12.022] [Citation(s) in RCA: 3] [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] [Indexed: 10/22/2022]
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Acerbi F, Guillard V, Guillaume C, Saubanere M, Gontard N. An appraisal of the impact of compositional and ripening parameters on CO2 diffusivity in semi-hard cheese. Food Chem 2016; 194:1172-9. [DOI: 10.1016/j.foodchem.2015.08.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Revised: 07/25/2015] [Accepted: 08/07/2015] [Indexed: 10/23/2022]
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Acerbi F, Guillard V, Aliani M, Guillaume C, Gontard N. Novel methodology for the in situ assessment of CO 2 production rate and its application to anaerobic ripened cheese. Food Res Int 2015; 78:295-301. [DOI: 10.1016/j.foodres.2015.09.030] [Citation(s) in RCA: 8] [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] [Received: 07/09/2015] [Revised: 09/22/2015] [Accepted: 09/23/2015] [Indexed: 11/24/2022]
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Benzoubir N, Mussini C, Lejamtel C, Dos Santos A, Guillaume C, Desterke C, Samuel D, Bréchot C, Bourgeade MF, Guettier C. Gamma-smooth muscle actin expression is associated with epithelial-mesenchymal transition and stem-like properties in hepatocellular carcinoma. PLoS One 2015; 10:e0130559. [PMID: 26110787 PMCID: PMC4482489 DOI: 10.1371/journal.pone.0130559] [Citation(s) in RCA: 16] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Accepted: 05/21/2015] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND AND AIMS The prognosis of hepatocellular carcinoma (HCC) is hampered by frequent tumour recurrence and metastases. Epithelial-Mesenchymal Transition (EMT) is now recognized as a key process in tumour invasion, metastasis and the generation of cancer initiating cells. The morphological identification of EMT in tumour samples from the expression of novel mesenchymal markers could provide relevant prognostic information and aid in understanding the metastatic process. METHODS The expression of Smooth Muscle Actins was studied using immunofluorescence and immunohistochemistry assays in cultured liver cells during an induced EMT process and in liver specimens from adult and paediatric HCC series. RESULTS We report here that in HCC cell lines treated with TGF-β and in HCC specimens, the expression of αSMA, a known mesenchymal marker of EMT, could never be detected. In addition, our in vitro studies identified the enteric form of SMA, γSMA, as being a marker of EMT. Moreover, this SMA isoform was expressed in 46% of 58 tumours from 42 adult HCC patients and in 90% of 16 tumours from 12 paediatric HCC patients. Interestingly, this expression was significantly correlated with poor tumour differentiation and progenitor cell features characterized by the expression of EpCAM and K19. CONCLUSION Taken together, our results support the conclusion that γSMA expression in HCC is strongly correlated with the EMT process, HCC aggressiveness and the identification of cancer stem cells. This correlation suggests that γSMA represents a novel and powerful marker to predict HCC progression.
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Affiliation(s)
- Nassima Benzoubir
- Inserm, Unité 785, Villejuif, F-94800, France
- Univ Paris-Sud, UMR-S 785, Villejuif, F-94800, France
- DHU Hepatinov, Villejuif, France
| | - Charlotte Mussini
- AP-HP Hôpital Kremlin-Bicêtre, Service d’Anatomopathologie, Paris, France
- DHU Hepatinov, Villejuif, France
| | - Charlène Lejamtel
- Inserm, Unité 785, Villejuif, F-94800, France
- Univ Paris-Sud, UMR-S 785, Villejuif, F-94800, France
| | - Alexandre Dos Santos
- Inserm, Unité 785, Villejuif, F-94800, France
- Univ Paris-Sud, UMR-S 785, Villejuif, F-94800, France
- DHU Hepatinov, Villejuif, France
| | - Claire Guillaume
- AP-HP Hôpital Kremlin-Bicêtre, Service d’Anatomopathologie, Paris, France
- DHU Hepatinov, Villejuif, France
| | | | - Didier Samuel
- Inserm, Unité 785, Villejuif, F-94800, France
- Univ Paris-Sud, UMR-S 785, Villejuif, F-94800, France
- AP-HP Hôpital Paul Brousse, Centre Hépatobiliaire, Villejuif, France
- DHU Hepatinov, Villejuif, France
| | - Christian Bréchot
- Inserm, Unité 785, Villejuif, F-94800, France
- Univ Paris-Sud, UMR-S 785, Villejuif, F-94800, France
- Institut Pasteur, Paris, France
| | - Marie-Françoise Bourgeade
- Inserm, Unité 785, Villejuif, F-94800, France
- Univ Paris-Sud, UMR-S 785, Villejuif, F-94800, France
- AP-HP Hôpital Paul Brousse, Centre Hépatobiliaire, Villejuif, France
- DHU Hepatinov, Villejuif, France
- * E-mail:
| | - Catherine Guettier
- Inserm, Unité 785, Villejuif, F-94800, France
- Univ Paris-Sud, UMR-S 785, Villejuif, F-94800, France
- AP-HP Hôpital Kremlin-Bicêtre, Service d’Anatomopathologie, Paris, France
- DHU Hepatinov, Villejuif, France
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Chaix E, Broyart B, Couvert O, Guillaume C, Gontard N, Guillard V. Mechanistic model coupling gas exchange dynamics and Listeria monocytogenes growth in modified atmosphere packaging of non respiring food. Food Microbiol 2015; 51:192-205. [PMID: 26187845 DOI: 10.1016/j.fm.2015.05.017] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Revised: 05/04/2015] [Accepted: 05/21/2015] [Indexed: 11/28/2022]
Abstract
A mechanistic model coupling O2 and CO2 mass transfer (namely diffusion and solubilisation in the food itself and permeation through the packaging material) to microbial growth models was developed aiming at predicting the shelf life of modified atmosphere packaging (MAP) systems. It was experimentally validated on a non-respiring food by investigating concomitantly the O2/CO2 partial pressure in packaging headspace and the growth of Listeria monocytogenes (average microbial count) within the food sample. A sensitivity analysis has revealed that the reliability of the prediction by this "super-parametrized" model (no less than 47 parameters were required for running one simulation) was strongly dependent on the accuracy of the microbial input parameters. Once validated, this model was used to decipher the role of O2/CO2 mass transfer on microbial growth and as a MAP design tool: an example of MAP dimensioning was provided in this paper as a proof of concept.
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Affiliation(s)
- E Chaix
- UMR 1208 IATE Agropolymers Engineering and Emerging Technologies, Université de Montpellier, CIRAD, INRA, Montpellier Supagro, 2 place Pierre Viala, F-34060 Montpellier Cedex 1, France
| | - B Broyart
- UMR 1145 Ingénierie Procédés Aliments (GENIAL), AgroParisTech, INRA, 1 avenue des Olympiades, F-91300 Massy, France
| | - O Couvert
- Université de Brest, EA3882, Laboratoire Universitaire de Biodiversité et Ecologie Microbienne, UMT14.01 SPORE-RISK, 6 rue de l'Université, F-29334 Quimper, France
| | - C Guillaume
- UMR 1208 IATE Agropolymers Engineering and Emerging Technologies, Université de Montpellier, CIRAD, INRA, Montpellier Supagro, 2 place Pierre Viala, F-34060 Montpellier Cedex 1, France
| | - N Gontard
- UMR 1208 IATE Agropolymers Engineering and Emerging Technologies, Université de Montpellier, CIRAD, INRA, Montpellier Supagro, 2 place Pierre Viala, F-34060 Montpellier Cedex 1, France
| | - V Guillard
- UMR 1208 IATE Agropolymers Engineering and Emerging Technologies, Université de Montpellier, CIRAD, INRA, Montpellier Supagro, 2 place Pierre Viala, F-34060 Montpellier Cedex 1, France.
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Baudart J, Guillaume C, Mercier A, Lebaron P, Binet M. Rapid quantification of viable Legionella
in nuclear cooling tower waters using filter cultivation, fluorescent in situ
hybridization and solid-phase cytometry. J Appl Microbiol 2015; 118:1238-49. [DOI: 10.1111/jam.12783] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Revised: 02/12/2015] [Accepted: 02/12/2015] [Indexed: 11/29/2022]
Affiliation(s)
- J. Baudart
- Sorbonne Universités; UPMC Univ Paris 06; USR 3579; LBBM; Observatoire Océanologique; Banyuls/mer France
- CNRS; USR 3579; LBBM; Observatoire Océanologique; Banyuls/mer France
| | - C. Guillaume
- EDF; Laboratoire National d'Hydraulique et Environnement; Chatou France
- Euro Engineering; Énergie-Environnement; Puteaux France
| | - A. Mercier
- Sorbonne Universités; UPMC Univ Paris 06; USR 3579; LBBM; Observatoire Océanologique; Banyuls/mer France
- CNRS; USR 3579; LBBM; Observatoire Océanologique; Banyuls/mer France
| | - P. Lebaron
- Sorbonne Universités; UPMC Univ Paris 06; USR 3579; LBBM; Observatoire Océanologique; Banyuls/mer France
- CNRS; USR 3579; LBBM; Observatoire Océanologique; Banyuls/mer France
| | - M. Binet
- EDF; Laboratoire National d'Hydraulique et Environnement; Chatou France
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Brun V, Guillaume C, Mechiche Alami S, Josse J, Jing J, Draux F, Bouthors S, Laurent-Maquin D, Gangloff SC, Kerdjoudj H, Velard F. Chitosan/hydroxyapatite hybrid scaffold for bone tissue engineering. Biomed Mater Eng 2015; 24:63-73. [PMID: 24928919 DOI: 10.3233/bme-140975] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND To favor regeneration following critical bone defect, a combination of autologous bone graft and biomaterials is currently used. Major drawbacks of such techniques remain the availability of the autologous material and the second surgical site, inducing pain and morbidity. OBJECTIVE Our aim was to investigate the biocompatibility in vitro of three dimensions hybrid biodegradable scaffolds combining osteoconductive properties of hydroxyapatite and anti-inflammatory properties of chitosan. METHODS Hybrid scaffolds were characterized by microscopic observations, equilibrium swelling ratio and overtime weight loss measurements. In vitro studies were performed using primary human bone cells cultured for 7, 14 and 21 days. Cell viability, proliferation, morphology and differentiation through alkaline phosphatase (ALP) activity measurement were assessed. RESULTS Characterization of our scaffolds demonstrated porous, hydrophilic and biodegradable characteristics. In vitro studies showed that these scaffolds have induced slight decrease in cell death and proliferation comparing to the culture plastic substrate control condition, as well as increased short term osteoinductive properties. CONCLUSIONS In this study, we have provided evidence that our hybrid hydroxyapatite/chitosan scaffolds could be suitable for bone filling.
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Affiliation(s)
- V Brun
- EA 4691 «Biomatériaux et Inflammation en Site Osseux», Pôle Santé, SFR CAP-Santé (FED 4231), Université de Reims Champagne-Ardenne, Reims, France Département de Chirurgie Orthopédique et Traumatologie, CHU de Reims, Reims, France
| | - C Guillaume
- EA 4691 «Biomatériaux et Inflammation en Site Osseux», Pôle Santé, SFR CAP-Santé (FED 4231), Université de Reims Champagne-Ardenne, Reims, France UFR d'Odontologie, URCA, Reims, France
| | - S Mechiche Alami
- EA 4691 «Biomatériaux et Inflammation en Site Osseux», Pôle Santé, SFR CAP-Santé (FED 4231), Université de Reims Champagne-Ardenne, Reims, France UFR d'Odontologie, URCA, Reims, France
| | - J Josse
- EA 4691 «Biomatériaux et Inflammation en Site Osseux», Pôle Santé, SFR CAP-Santé (FED 4231), Université de Reims Champagne-Ardenne, Reims, France UFR de Pharmacie, URCA, Reims, France
| | - J Jing
- EA 4691 «Biomatériaux et Inflammation en Site Osseux», Pôle Santé, SFR CAP-Santé (FED 4231), Université de Reims Champagne-Ardenne, Reims, France UFR d'Odontologie, URCA, Reims, France
| | - F Draux
- EA 4691 «Biomatériaux et Inflammation en Site Osseux», Pôle Santé, SFR CAP-Santé (FED 4231), Université de Reims Champagne-Ardenne, Reims, France UFR d'Odontologie, URCA, Reims, France
| | - S Bouthors
- EA 4691 «Biomatériaux et Inflammation en Site Osseux», Pôle Santé, SFR CAP-Santé (FED 4231), Université de Reims Champagne-Ardenne, Reims, France UFR d'Odontologie, URCA, Reims, France
| | - D Laurent-Maquin
- EA 4691 «Biomatériaux et Inflammation en Site Osseux», Pôle Santé, SFR CAP-Santé (FED 4231), Université de Reims Champagne-Ardenne, Reims, France UFR d'Odontologie, URCA, Reims, France Département de Chirurgie Dentaire, CHU de Reims, Reims, France
| | - S C Gangloff
- EA 4691 «Biomatériaux et Inflammation en Site Osseux», Pôle Santé, SFR CAP-Santé (FED 4231), Université de Reims Champagne-Ardenne, Reims, France UFR de Pharmacie, URCA, Reims, France
| | - H Kerdjoudj
- EA 4691 «Biomatériaux et Inflammation en Site Osseux», Pôle Santé, SFR CAP-Santé (FED 4231), Université de Reims Champagne-Ardenne, Reims, France UFR d'Odontologie, URCA, Reims, France
| | - F Velard
- EA 4691 «Biomatériaux et Inflammation en Site Osseux», Pôle Santé, SFR CAP-Santé (FED 4231), Université de Reims Champagne-Ardenne, Reims, France UFR d'Odontologie, URCA, Reims, France Plateforme d'Imagerie Cellulaire et Tissulaire, URCA, Reims, France
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Blay C, Antoine S, Guillaume C, Erwan D, Romain V, David G, Oscar A, Huazhong H, Pascal H, Renaud D. Prostate CT CBCT Registration Quality Assessment. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.1382] [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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Velard F, Delion M, Le Henaff C, Tabary O, Guillaume C, Barthes F, Touqui L, Gangloff S, Sermet-Gaudelus I, Jacquot J. WS6.7 Cystic fibrosis and bone disease: defective osteoblast maturation with the F508del mutation in CFTR. J Cyst Fibros 2014. [DOI: 10.1016/s1569-1993(14)60043-6] [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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Richard D, Oszust F, Guillaume C, Millart H, Laurent-Maquin D, Brou C, Bausero P, Visioli F. Infusion of docosahexaenoic acid protects against myocardial infarction. Prostaglandins Leukot Essent Fatty Acids 2014; 90:139-43. [PMID: 24480264 DOI: 10.1016/j.plefa.2014.01.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Revised: 01/01/2014] [Accepted: 01/02/2014] [Indexed: 01/14/2023]
Abstract
Most of the cardioprotective effects of long-chain omega 3 fatty acids, namely docosahexaenoic (DHA; 22:6n-3) and eicosapentaenoic (EPA; 20:5n-3), are due to their hypotriglyceridemic and anti-inflammatory effects, which lower the risk for cardiovascular disease and myocardial infarction. Little is known on the direct preventive activities of DHA and EPA on heart function. In isolated hearts, we studied (1) whether infused DHA is able to protect the heart from ischemia/reperfusion damage and (2) the role played by Notch-mediated signal transduction pathways in myocardial infarction. Perfusion with DHA before and before/after induction of ischemia reperfusion significantly diminished cardiac damage and afforded antioxidant protection. Mechanistically, infusion of DHA before and before/after the induction of ischemia differentially modulated the expression of Notch2 and 3 target genes. In particular, DHA increased the expression of Hey1 when infused pre- and pre/post-ischemia; Jagged 1 and the Notch2 receptors increased with DHA pre-ischemia, but not pre/post; Notch2 and 3 receptors as well as Delta increased following DHA administration pre- and (especially) pre/post-ischemia. In conclusion, while the precise nature of the Notch-mediated protection from ischemia/reperfusion afforded by DHA is as yet to be fully elucidated, our data add to the growing body of literature that indicates how systemic administration of DHA provides cardiovascular protection.
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Affiliation(s)
- D Richard
- Université Pierre et Marie Curie, Paris, France
| | - F Oszust
- EA3801 HERVI (Hémostase et Remodelage Vasculaire post-Ischémique), Université de Reims Champagne-Ardenne, France
| | - C Guillaume
- EA 4691 BiOs (Biomatériaux et inflammation en site Osseux), Université de Reims Champagne-Ardenne, France
| | - H Millart
- EA3801 HERVI (Hémostase et Remodelage Vasculaire post-Ischémique), Université de Reims Champagne-Ardenne, France
| | - D Laurent-Maquin
- EA 4691 BiOs (Biomatériaux et inflammation en site Osseux), Université de Reims Champagne-Ardenne, France
| | - C Brou
- Unité de Signalisation Moléculaire et Activation Cellulaire, Institut Pasteur, Paris, France
| | - P Bausero
- Université Pierre et Marie Curie, Paris, France
| | - F Visioli
- IMDEA-Food, CEI UAM+CSIC, C/Faraday 7, 28049 Madrid, Spain.
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Francin PJ, Abot A, Guillaume C, Moulin D, Bianchi A, Gegout-Pottie P, Jouzeau JY, Mainard D, Presle N. Association between adiponectin and cartilage degradation in human osteoarthritis. Osteoarthritis Cartilage 2014; 22:519-26. [PMID: 24462671 DOI: 10.1016/j.joca.2014.01.002] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Revised: 01/03/2014] [Accepted: 01/15/2014] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Conflicting findings raise questions about the role of adiponectin in osteoarthritis (OA). The current study aimed to investigate in OA patients the association between the production of adiponectin and the grade of cartilage destruction, and to provide functional evidence for a potential role of adiponectin in OA. DESIGN The expression of adiponectin was examined by immunohistochemistry in cartilage obtained from healthy individuals (n = 2; ages 56 and 41 years; 1 male and 1 female) and OA patients (n = 11; ages 64-79 years; 2 male and 9 female). The association between its production in chondrocytes and the grade of cartilage destruction was established on full-depth cartilage biopsies. The functional activity of adiponectin in OA cartilage was determined from the relation between the expression of adiponectin, its receptor, cartilage-specific components and factors involved in matrix degradation, and from the chondrocyte response to the full-length or the globular form of adiponectin. RESULTS Adiponectin was not detected in healthy cartilage. Conversely, the adipokine was up-regulated in damaged tissue, but no strong association with the grade of cartilage destruction was found. We showed a positive correlation between adiponectin and mPGES or MMP-13 while AdipoR1 was related to the expression of type 2 collagen, aggrecan and Sox9. The full-length form of adiponectin but not the globular isoform, stimulated the production of PGE2 and MMP-13 activity in cultured human chondrocytes. CONCLUSIONS The elevated level of adiponectin found in chondrocytes from OA patients might contribute to matrix remodelling during OA, the full-length isoform being the single active form.
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Affiliation(s)
- P-J Francin
- UMR 7365 CNRS-Universite de Lorraine, Biopôle de l'Universite de Lorraine, campus Biologie-Sante, Avenue de la forêt de Haye, BP 184, 54505 Vandoeuvre-les-Nancy, France.
| | - A Abot
- UMR 7365 CNRS-Universite de Lorraine, Biopôle de l'Universite de Lorraine, campus Biologie-Sante, Avenue de la forêt de Haye, BP 184, 54505 Vandoeuvre-les-Nancy, France.
| | - C Guillaume
- UMR 7365 CNRS-Universite de Lorraine, Biopôle de l'Universite de Lorraine, campus Biologie-Sante, Avenue de la forêt de Haye, BP 184, 54505 Vandoeuvre-les-Nancy, France.
| | - D Moulin
- UMR 7365 CNRS-Universite de Lorraine, Biopôle de l'Universite de Lorraine, campus Biologie-Sante, Avenue de la forêt de Haye, BP 184, 54505 Vandoeuvre-les-Nancy, France.
| | - A Bianchi
- UMR 7365 CNRS-Universite de Lorraine, Biopôle de l'Universite de Lorraine, campus Biologie-Sante, Avenue de la forêt de Haye, BP 184, 54505 Vandoeuvre-les-Nancy, France.
| | - P Gegout-Pottie
- UMR 7365 CNRS-Universite de Lorraine, Biopôle de l'Universite de Lorraine, campus Biologie-Sante, Avenue de la forêt de Haye, BP 184, 54505 Vandoeuvre-les-Nancy, France.
| | - J-Y Jouzeau
- UMR 7365 CNRS-Universite de Lorraine, Biopôle de l'Universite de Lorraine, campus Biologie-Sante, Avenue de la forêt de Haye, BP 184, 54505 Vandoeuvre-les-Nancy, France.
| | - D Mainard
- UMR 7365 CNRS-Universite de Lorraine, Biopôle de l'Universite de Lorraine, campus Biologie-Sante, Avenue de la forêt de Haye, BP 184, 54505 Vandoeuvre-les-Nancy, France.
| | - N Presle
- UMR 7365 CNRS-Universite de Lorraine, Biopôle de l'Universite de Lorraine, campus Biologie-Sante, Avenue de la forêt de Haye, BP 184, 54505 Vandoeuvre-les-Nancy, France.
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Guillaume C, Gertz C, Ravetti L. Pyropheophytin a and 1,2-Diacyl-glycerols Over Time Under Different Storage Conditions in Natural Olive Oils. J AM OIL CHEM SOC 2014. [DOI: 10.1007/s11746-014-2415-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [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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Buache E, Velard F, Bauden E, Guillaume C, Jallot E, Nedelec J, Laurent-Maquin D, Laquerriere P. Effect of strontium-substituted biphasic calcium phosphate on inflammatory mediators production by human monocytes. Acta Biomater 2012; 8:3113-9. [PMID: 22579711 DOI: 10.1016/j.actbio.2012.04.045] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2012] [Revised: 03/27/2012] [Accepted: 04/30/2012] [Indexed: 10/28/2022]
Abstract
Calcium phosphate materials are widely used as bone substitutes because of their properties close to those of the mineral phase of bones. Nevertheless, after several months, calcium phosphate-based materials release particles that may be phagocytosed by monocytes, leading to an inflammatory reaction. Strontium is well known to counteract the osteoporosis process, but little is known about its effect on inflammatory processes. The purpose of this work was to study the effect of biphasic calcium phosphate (BCP) particles substituted with strontium on the inflammatory reaction. Human primary monocytes stimulated or not by lipopolysaccharide (LPS) were exposed to BCP particles containing strontium for 6 and 24 h. Inflammatory mediators (cytokines and matrix metalloproteinases (MMPs)) production was then quantified by ELISA and zymography. We observed that the presence of strontium had few effects on unstimulated cells, but it decreased the production of pro-inflammatory cytokines and the chemokine interleukin 8 in LPS-stimulated cell-conditioned medium. This work suggests for the first time that strontium may be involved in the control of inflammatory processes following BCP phagocytosis by human monocytes.
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Gimenez-Maitre A, Le Henaff C, Norez C, Guillaume C, Ravoninjatovo B, Laurent-Maquin D, Becq F, Jacquot J. Deficit of osteoprotegerin release by osteoblasts from a patient with cystic fibrosis. Eur Respir J 2012; 39:780-1. [PMID: 22379154 DOI: 10.1183/09031936.00104111] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Scheler T, Degtyareva O, Guillaume C, Proctor J, Evans S, Gregoryanz E. High-pressure synthesis of transition metal hydrides. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311098655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Guillaume C, Guillery-Girard B, Eustache F, Desgranges B. Mémoire et vieillissement normal : données comportementales et électrophysiologiques. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.npg.2008.04.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Prothet J, Floccard B, Levrat A, Guillaume C, Faure A, Marcotte G, Allaouchiche B. Embolies systémiques récidivantes : chercher le thrombus dans… l’aorte. ACTA ACUST UNITED AC 2008; 27:723-6. [DOI: 10.1016/j.annfar.2008.06.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2008] [Accepted: 06/25/2008] [Indexed: 11/26/2022]
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Servettaz A, Guillaume C, Régent A, Noel V, Strady C, Jaussaud R. Leucoencéphalite progressive multifocale à JC virus chez deux patients non VIH atteints de granulomatose systémique. Rev Med Interne 2007. [DOI: 10.1016/j.revmed.2007.03.199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Richard D, Dumelié N, Benhayoune H, Bouthors S, Guillaume C, Lalun N, Balossier G, Laurent-Maquin D. Behavior of human osteoblast-like cells in contact with electrodeposited calcium phosphate coatings. J Biomed Mater Res B Appl Biomater 2006; 79:108-15. [PMID: 16470834 DOI: 10.1002/jbm.b.30519] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Calcium-deficient hydroxyapatite (Ca-def-HAP) thin films were elaborated on Ti6Al4V substrates by electrodeposition. The coatings exhibit two different morphologies and crystallinities. Human osteoblast-like cells (MG-63) were cultured on the surfaces of these materials; the cell content and viability were evaluated up to 28 days. The scanning electron microscopy and biological investigations showed cells with a normal morphology, good proliferation, and viability from 7 to 21 days. But after 28 days, the number of live cells decreases in both cases; however, this decrease is less important in the case of calcium phosphate (CaP) coating surface when compared with the control (cell culture plastic). The cells cultured on Ca-def-HAP coating exhibit more cellular extensions and extracellular matrix. RT-PCR for type I collagen, alkaline phosphatase, and osteocalcin studies were also carried out, and was found that the CaP enhances gene expression of ALP and OC and thus the differentiation of osteoblast-like cells. Moreover, this study shows that the difference in the morphology of CaP coatings has no effect on the biocompatibility.
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Affiliation(s)
- D Richard
- INSERM ERM 0203, 1 rue Maréchal Juin 51096 Reims Cedex, France
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Guillaume C, Morniroli JP, Frost DJ, Serghiou G. Synthesis of hexagonal Ni(3)N using high pressures and temperatures. J Phys Condens Matter 2006; 18:8651-8660. [PMID: 21690915 DOI: 10.1088/0953-8984/18/37/021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The only known bulk ambient pressure nickel nitride phase is hexagonal Ni(3)N (space group P6(3)22). Multianvil synthesis experiments at 20 GPa and 2000 K using nickel (Ni) and sodium azide (NaN(3)) starting materials, and ex situ analysis using transmission electron microscopy and scanning electron microscopy measurements show that this phase can be recovered at ambient pressure (space group P6(3)22, a = 4.62 Å, c = 4.30 Å, Z = 2). Formation of this phase is correlated with the repulsive interactions between closely spaced nitrogen ions and with the extent of thermal stability of nickel nitride at ambient and at high densities. These two factors are also important in relating the high temperature and pressure behaviour of nickel nitride to those of several other interstitial nitrides recovered from similar pressures after heating. Further, we report formation of a sodium rhenium nitride phase by reaction of the azide with the rhenium capsule in which the reactants were contained.
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Affiliation(s)
- C Guillaume
- University of Edinburgh, School of Engineering and Electronics and Centre for Materials Science, Kings Buildings, Mayfield Road, EH9 3JL, UK
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Presle N, Pottie P, Dumond H, Guillaume C, Lapicque F, Pallu S, Mainard D, Netter P, Terlain B. Differential distribution of adipokines between serum and synovial fluid in patients with osteoarthritis. Contribution of joint tissues to their articular production. Osteoarthritis Cartilage 2006; 14:690-5. [PMID: 16527497 DOI: 10.1016/j.joca.2006.01.009] [Citation(s) in RCA: 203] [Impact Index Per Article: 11.3] [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] [Received: 11/22/2005] [Accepted: 01/13/2006] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To analyze the distribution of leptin, adiponectin and resistin between paired serum and synovial fluid (SF) samples of patients with osteoarthritis (OA) and to determine the potential sources of these adipokines in the joint. The active free form of leptin was also examined by evaluating the level of the soluble leptin receptor (sOb-R). METHODS Levels of adipokines and sOb-R were measured by a sandwich enzyme-linked immunosorbent assay in serum and SF collected from OA patients. The levels of adipokines were also determined in conditioned media from cultured joint tissues (synovium, infrapatellar fat pad, meniscus, osteophyte, cartilage and bone). RESULTS The adipokines exhibited different patterns of distribution between the joint and the circulating compartment. Serum levels of resistin and adiponectin exceeded those in the paired SF. Conversely, leptin SF concentrations were similar or higher than those measured in serum counterparts. Leptin and adiponectin in SF may derive from each joint tissue examined, whereas resistin was not detected in conditioned media of cultured explants. Synovium and infrapatellar fat pad were the major sources of adipokines, but osteophytes released also large amounts of leptin. The sOb-R deficiency found in SF further increased the difference in the bioactive leptin levels between serum and SF. A gender-specific difference was observed with women exhibiting the highest level of free leptin in the joint. CONCLUSION These data demonstrated that adipokines serum levels are not predictive values for SF determination. The joint cavity is a special space where each adipokine undergoes specific regulatory pathways, strengthening the hypothesis that adipokines may have local effects in the joint and may account for the high prevalence of OA in women.
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Affiliation(s)
- N Presle
- Faculté de Médecine, UMR CNRS-UHP 7561, Avenue de la forêt de Haye, BP 184, 54505 Vandoeuvre-les-Nancy, France.
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Schoeffler M, Crozon J, Levrat A, Guillaume C, Floccard B, Allaouchiche B. Pasteurellose bactériémique : à propos d'un cas. ACTA ACUST UNITED AC 2006; 25:309-11. [PMID: 16360299 DOI: 10.1016/j.annfar.2005.11.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2005] [Accepted: 11/08/2005] [Indexed: 10/25/2022]
Abstract
Bacteremic pasteurellosis is an uncommon form of Pasteurella multocida infection, usually involved in local infections. This systemic infection often occurs in immuno-compromised patient such as cirrhotic or alcoholic patients, with a high mortality rate (up to 60%). Septic shock may occur and neurological disorders or coma are frequent. We report such a case. Treatment associated local care, antibiotics (beta-lactam antibiotics plus fluoroquinolone) during 14 days and resuscitation of septic shock. Owing these therapies, septic shock was successfully treated without complications.
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Affiliation(s)
- M Schoeffler
- Service de réanimation, pavillon G, département d'anesthésie-réanimation, hôpital Edouard-Herriot, Lyon, France.
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Defournel C, Guillaume C, Allaouchiche B. [Rhabdomyolysis after severe hyponatremia]. Ann Fr Anesth Reanim 2006; 25:214-5. [PMID: 16226423 DOI: 10.1016/j.annfar.2005.09.001] [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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Abstract
A Doehlert design was performed to study the effect of calcium and phosphate supplementation at 0 to 25 mmol/kg and 0 to 16 mmol/kg, respectively, on the rennet gelation of reconstituted skim milk subjected to pH-reversible CO(2) acidification. Supplemented reconstituted skim milk samples were acidified to pH 5.80 by the addition of CO(2) under pressure and depressurized under vacuum to restore the initial pH value. The second-order polynomial models satisfactorily predicted the effect of salt addition on the micellar molar Ca:P ratio and the average diameter of the casein micelles, whereas only trends were used in the analysis of the rennet-clotting behavior of salt-supplemented, CO(2)-treated milk. Whether added Ca was the most determinant factor on the micellar molar Ca:P ratio, added Pi (a mixture of Na(2)HPO(4) and NaH(2)PO(4)) was the most determinant factor on the other responses studied, and its effect was most pronounced when Ca was simultaneously added. By comparison with control samples, changes observed in this study were essentially due to salt supplementation and not to the CO(2) treatment. Therefore, this CO(2) treatment could be considered as an entirely reversible treatment rather than only pH-reversible, and predictions might be applied to untreated milk. In the case of Ca-supplemented milk, the micellar molar Ca:P ratio increased, the average micellar diameter decreased, and the rennet-clotting properties were improved, whereas opposite effects were observed upon Pi supplementation. Since modification of the micellar molar ratio is the result of change in the chemical composition of micellar calcium phosphate, the effect of calcium and phosphate supplementation on the rennet clotting of milk was found to be also dependent on the nature of the interaction between caseins and colloidal calcium phosphate.
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Affiliation(s)
- C Guillaume
- Joint Research Unit for Agropolymer Engineering, and Emerging Technologies, University Montpellier II, 34095 Montpellier Cedex 5, France.
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Jounieaux V, Guillaume C, Malka M, Wursthorn M, Girod I, Baron-Papillon F. [Medico-economic evaluation of a care management program for asthmatic patients]. Sante Publique 2003; 15:449-64. [PMID: 14964013] [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: 04/28/2023]
Abstract
This study aimed at measuring the medico-economic interest of a care management programme established for asthmatic patients in the Amiens region ("Action Asthma Amieris") by using and comparing different evaluation tools. Three tools were used in parallel: 1) a questionnaire for collecting information on healthcare received was completed monthly by 305 patients recruited by 73 physicians between November 1998 and January 1999; 2) data issued by the national insurance fund for the years 1998 and 1999, for those patients included after January 1999; and 3) data on all hospitalisations for 1998 and 1999 in the University Hospital Centre obtained from the French hospital information database (PMSI). Data from the national insurance fund and from the PMSI are essential to evaluate costs, since the patients' statements proved to under-estimate the amount of healthcare administered and received. Following the implementation of this asthma care management programme, an increase of pharmaceutical expenses and a decrease in the number of hospitalisations for asthmatic patients were observed.
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Affiliation(s)
- V Jounieaux
- Service de Pnsumologie, CHU d'Amiens, Amiens, France
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Delépine P, Guillaume C, Montier T, Clément JC, Yaouanc JJ, Des Abbayes H, Berthou F, Le Pape A, Férec C. Biodistribution study of phosphonolipids: a class of non-viral vectors efficient in mice lung-directed gene transfer. J Gene Med 2003; 5:600-8. [PMID: 12825199 DOI: 10.1002/jgm.385] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND A multitude of cationic lipids have been synthesized since they were first proposed for use in gene therapy. Cationic lipids are able to efficiently transfect cells both in vitro and in vivo. Whereas most research groups have focused their investigations on the toxicity of these molecules, and on the location of expression of the DNA transferred by these vectors, little has been done to determine their biodistribution and elimination pathways. Our group has developed a family of cationic lipids termed phosphonolipids. Following a large in vitro screening experiment, we have selected several molecules for in vivo testing, with some of these phosphonolipids forming lipoplexes efficient in transfecting mouse lungs. It was thus of interest to study their fate after intravenous injection. METHODS The respective biodistributions of both the GLB43 phosphonolipid and plasmid DNA were investigated and compared with DNA expression sites. Using the optimal conditions determined for phosphonolipids, we followed the gene transfer agent and plasmid DNA distributions versus time by radiolabeling them with (14)C and (32)P, respectively. Otherwise, we performed imaging by radiolabeling plasmid DNA with (99m)Tc. RESULTS The lipoplexes appear to be directly located in the lung after administration. Secondly, the plasmid is released mainly into the lungs and the phosphonolipid vector is rapidly degraded. The hydrophilic moiety of the phosphonolipid is eliminated in the urine, as is the free plasmid. CONCLUSIONS This study reveals that there are slight differences in the observed results depending on the technique used to label the DNA; secondly, results show that the residence time of phosphonolipids in the mouse body is related to the DNA binding time.
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Affiliation(s)
- P Delépine
- Inserm EMI-U 01-15: génétique moléculaire et épidémiologie génétique, 46 rue Félix Le Dantec, BP 454, 29275 Brest, France.
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Abstract
An experimental method based on the controlled chymosin-induced kappa-casein hydrolysis of milk was proposed to modify micellar reactivity. Milk samples with a degree of kappa-casein hydrolysis of 19, 35, and 51% were obtained. The physicochemical properties of partially converted casein micelles were determined. The net negative charge of casein micelles was reduced with increasing degree of kappa-casein hydrolysis and a small but significant decrease in hydrodynamic diameter and micellar hydration were noted. Dynamic low amplitude oscillatory rheology was used to monitor the rheological properties of acid milk gels (GDL) made with partially chymosin-hydrolyzed milks in comparison with those of strictly acid and rennet gels. An increase in the gelation pH value was observed with increasing the degree of kappa-casein hydrolysis. The moduli values (G' and G'') reached 2 h after the point of gel were, for all degrees of hydrolysis tested, significantly higher than those of strictly rennet and acid gels. Comparison of changes in delta G'/delta t with time indicated differences in gel formation that could be related to the increased values of G' obtained for acid gel made with chymosin-treated milk. At a given time after gelation (2 h), increasing the degree of kappa-casein hydrolysis in milk led also to an increase in the loss tangent and the serum holding capacity of acid milk gels suggesting a correlation between these two parameters.
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Affiliation(s)
- E Gastaldi
- Laboratoire de Génie des Procédés et Sciences des Aliments, Université Montpellier II, 34095 Montpellier Cedex 05, France.
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Jounieaux V, Guillaume C, Malka M, Wursthorn M, Girod I, Baron-Papillon F. Evaluation médico-économique d'un programme de prise en charge de patients asthmatiques. Santé Publique 2003. [DOI: 10.3917/spub.034.0449] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Abstract
Response surface methodology was used to investigate the effect of salt supplementation on the micellar composition of reconstituted skim milk subjected to acidification by CO2 pressure to pH 5.8, followed by depressurization under vacuum. Using a Doehlert design, calcium and phosphate were added to skim milk in the range of 0 to 25 mmol/kg and 0 to 16 mmol/kg of milk, respectively, and the pH was adjusted to 6.65 +/- 0.02. After carbonation, the milk sample was depressurized, and the pH returned to its initial value without modification of the ionic strength. Micellar composition was assessed by the concentration of micellar Ca, P, Mg, and protein, and the buffering properties of milk. The second order polynomial models satisfactorily predicted the effect of salt supplementation on the micellar composition (R2adj > 0.75). Added calcium was the most determinant factor, and favored the removal of Ca, P, Mg, and proteins from the soluble phase to the micellar phase when this addition was less than 17.5 mmol/kg of milk. Above this concentration, only the concentration of micellar Ca increased. The buffering response surface showed that the amount of micellar calcium phosphate increased to a maximum upon addition of 17.5 mmol of Ca/kg. By comparison with a control sample (supplemented but untreated skim milk), changes were essentially due to salt supplementation and not to the CO2 treatment. We suggest that Ca formed micellar calcium phosphate when added at a concentration less than 17.5 mmol/kg; whereas above this concentration, Ca bound directly to micellar proteins.
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Affiliation(s)
- C Guillaume
- Laboratoire de Génie Biologique et Sciences des Aliments, Université Montpellier II, 34095 Montpellier, France
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Delepine P, Montier T, Guillaume C, Vaysse L, Le Pape A, Ferec C. Visualization of the transgene distribution according to the administration route allows prediction of the transfection efficacy and validation of the results obtained. Gene Ther 2002; 9:736-9. [PMID: 12032699 DOI: 10.1038/sj.gt.3301742] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Gene transfer to the lung can be achieved via a systemic, that targets the endothelium, or local, that targets the epithelium, delivery route. In the present study, we followed the distribution of a plasmid after transfection using some of our phosphonolipids, which have previously shown their efficiency in transfecting mouse lungs. The plasmid was radiolabeled and varying combinations of plasmid/phosphonolipid were administered by intravenous injection, or by endotracheal spray. The distribution of radioactive labeling was observed over a time course using a gamma-camera. These images were then correlated with the results for luciferase expression levels in the lungs. In each case, lungs were well targeted. However, whereas an intravenous injection reaches all of the lung immediately, progressive diffusion occurs when the plasmid/phosphonolipid is administered via an aerosol. Elimination of the radioactivity associated with plasmid occurs via the urinary tract after intravenous injections, and via the feces using the aerosol delivery approach. The radioactivity detected in the lungs correlated strongly with transgene expression. Thus, such an imaging technique is a powerful strategy to predict the formulation that will generate the best transfection efficiency. This study reveals that scintigraphic imaging permits both validation of the administration method and the results obtained for each animal, thereby reducing the statistical variability of in vivo experiments.
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Affiliation(s)
- P Delepine
- INSERM EMI-U 01-15, UBO, Brest, France, and CHU Morvan, Brest, France
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