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Barone M, Ramayo-Caldas Y, Estellé J, Tambosco K, Chadi S, Maillard F, Gallopin M, Planchais J, Chain F, Kropp C, Rios-Covian D, Sokol H, Brigidi P, Langella P, Martín R. Correction: Gut barrier-microbiota imbalances in early life lead to higher sensitivity to inflammation in a murine model of C-section delivery. Microbiome 2023; 11:173. [PMID: 37542356 PMCID: PMC10403874 DOI: 10.1186/s40168-023-01631-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/06/2023]
Affiliation(s)
- M Barone
- Microbiomics Unit, Department of Medical and Surgical Sciences, University of Bologna, 40138, Bologna, Italy
| | - Y Ramayo-Caldas
- INRAE, AgroParisTech, GABI, Paris-Saclay University, 78350, Jouy-en-Josas, France
- Animal Breeding and Genetics Program, Institute for Research and Technology in Food and Agriculture (IRTA), Torre Marimon, 08140, Caldes de Montbui, Spain
| | - J Estellé
- INRAE, AgroParisTech, GABI, Paris-Saclay University, 78350, Jouy-en-Josas, France
| | - K Tambosco
- INRAE, AgroParisTech, Micalis Institut, Paris-Saclay University, 78350, Jouy-en-Josas, France
| | - S Chadi
- INRAE, AgroParisTech, Micalis Institut, Paris-Saclay University, 78350, Jouy-en-Josas, France
| | - F Maillard
- INRAE, AgroParisTech, Micalis Institut, Paris-Saclay University, 78350, Jouy-en-Josas, France
| | - M Gallopin
- CNRS, CEA, l'Institut de Biologie Intégrative de La Cellule (I2BC), Paris-Saclay University, 91405, Orsay, France
| | - J Planchais
- INRAE, AgroParisTech, Micalis Institut, Paris-Saclay University, 78350, Jouy-en-Josas, France
| | - F Chain
- INRAE, AgroParisTech, Micalis Institut, Paris-Saclay University, 78350, Jouy-en-Josas, France
| | - C Kropp
- INRAE, AgroParisTech, Micalis Institut, Paris-Saclay University, 78350, Jouy-en-Josas, France
| | - D Rios-Covian
- INRAE, AgroParisTech, Micalis Institut, Paris-Saclay University, 78350, Jouy-en-Josas, France
| | - H Sokol
- INRAE, AgroParisTech, Micalis Institut, Paris-Saclay University, 78350, Jouy-en-Josas, France
- Gastroenterology Department, Centre de Recherche Saint-Antoine, Centre de Recherche Saint-Antoine, CRSA, AP-HP, INSERM, Saint Antoine Hospital, Sorbonne Université, 75012, Paris, France
- Paris Centre for Microbiome Medicine (PaCeMM) FHU, Paris, France
| | - P Brigidi
- Microbiomics Unit, Department of Medical and Surgical Sciences, University of Bologna, 40138, Bologna, Italy
| | - P Langella
- INRAE, AgroParisTech, Micalis Institut, Paris-Saclay University, 78350, Jouy-en-Josas, France
- Paris Centre for Microbiome Medicine (PaCeMM) FHU, Paris, France
| | - R Martín
- INRAE, AgroParisTech, Micalis Institut, Paris-Saclay University, 78350, Jouy-en-Josas, France.
- Paris Centre for Microbiome Medicine (PaCeMM) FHU, Paris, France.
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Barone M, Ramayo-Caldas Y, Estellé J, Tambosco K, Chadi S, Maillard F, Gallopin M, Planchais J, Chain F, Kropp C, Rios-Covian D, Sokol H, Brigidi P, Langella P, Martín R. Gut barrier-microbiota imbalances in early life lead to higher sensitivity to inflammation in a murine model of C-section delivery. Microbiome 2023; 11:140. [PMID: 37394428 PMCID: PMC10316582 DOI: 10.1186/s40168-023-01584-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 05/25/2023] [Indexed: 07/04/2023]
Abstract
BACKGROUND Most interactions between the host and its microbiota occur at the gut barrier, and primary colonizers are essential in the gut barrier maturation in the early life. The mother-offspring transmission of microorganisms is the most important factor influencing microbial colonization in mammals, and C-section delivery (CSD) is an important disruptive factor of this transfer. Recently, the deregulation of symbiotic host-microbe interactions in early life has been shown to alter the maturation of the immune system, predisposing the host to gut barrier dysfunction and inflammation. The main goal of this study is to decipher the role of the early-life gut microbiota-barrier alterations and its links with later-life risks of intestinal inflammation in a murine model of CSD. RESULTS The higher sensitivity to chemically induced inflammation in CSD mice is related to excessive exposure to a too diverse microbiota too early in life. This early microbial stimulus has short-term consequences on the host homeostasis. It switches the pup's immune response to an inflammatory context and alters the epithelium structure and the mucus-producing cells, disrupting gut homeostasis. This presence of a too diverse microbiota in the very early life involves a disproportionate short-chain fatty acids ratio and an excessive antigen exposure across the vulnerable gut barrier in the first days of life, before the gut closure. Besides, as shown by microbiota transfer experiments, the microbiota is causal in the high sensitivity of CSD mice to chemical-induced colitis and in most of the phenotypical parameters found altered in early life. Finally, supplementation with lactobacilli, the main bacterial group impacted by CSD in mice, reverts the higher sensitivity to inflammation in ex-germ-free mice colonized by CSD pups' microbiota. CONCLUSIONS Early-life gut microbiota-host crosstalk alterations related to CSD could be the linchpin behind the phenotypic effects that lead to increased susceptibility to an induced inflammation later in life in mice. Video Abstract.
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Affiliation(s)
- M. Barone
- Microbiomics Unit, Department of Medical and Surgical Sciences, University of Bologna, 40138 Bologna, Italy
| | - Y. Ramayo-Caldas
- INRAE, AgroParisTech, GABI, Paris-Saclay University, 78350 Jouy-en-Josas, France
- Animal Breeding and Genetics Program, Institute for Research and Technology in Food and Agriculture (IRTA), Torre Marimon, 08140 Caldes de Montbui, Spain
| | - J. Estellé
- INRAE, AgroParisTech, GABI, Paris-Saclay University, 78350 Jouy-en-Josas, France
| | - K. Tambosco
- INRAE, AgroParisTech, Micalis Institut,, Paris-Saclay University, 78350 Jouy-en-Josas, France
| | - S. Chadi
- INRAE, AgroParisTech, Micalis Institut,, Paris-Saclay University, 78350 Jouy-en-Josas, France
| | - F. Maillard
- INRAE, AgroParisTech, Micalis Institut,, Paris-Saclay University, 78350 Jouy-en-Josas, France
| | - M. Gallopin
- CNRS, CEA, l’Institut de Biologie Intégrative de La Cellule (I2BC), Paris-Saclay University, 91405 Orsay, France
| | - J. Planchais
- INRAE, AgroParisTech, Micalis Institut,, Paris-Saclay University, 78350 Jouy-en-Josas, France
| | - F. Chain
- INRAE, AgroParisTech, Micalis Institut,, Paris-Saclay University, 78350 Jouy-en-Josas, France
| | - C. Kropp
- INRAE, AgroParisTech, Micalis Institut,, Paris-Saclay University, 78350 Jouy-en-Josas, France
| | - D. Rios-Covian
- INRAE, AgroParisTech, Micalis Institut,, Paris-Saclay University, 78350 Jouy-en-Josas, France
| | - H. Sokol
- INRAE, AgroParisTech, Micalis Institut,, Paris-Saclay University, 78350 Jouy-en-Josas, France
- Gastroenterology Department, Centre de Recherche Saint-Antoine, Centre de Recherche Saint-Antoine, CRSA, AP-HP, INSERM, Saint Antoine Hospital, Sorbonne Université, 75012 Paris, France
- Paris Centre for Microbiome Medicine (PaCeMM) FHU, Paris, France
| | - P. Brigidi
- Microbiomics Unit, Department of Medical and Surgical Sciences, University of Bologna, 40138 Bologna, Italy
| | - P. Langella
- INRAE, AgroParisTech, Micalis Institut,, Paris-Saclay University, 78350 Jouy-en-Josas, France
- Paris Centre for Microbiome Medicine (PaCeMM) FHU, Paris, France
| | - R. Martín
- INRAE, AgroParisTech, Micalis Institut,, Paris-Saclay University, 78350 Jouy-en-Josas, France
- Paris Centre for Microbiome Medicine (PaCeMM) FHU, Paris, France
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Atlan C, Chatelier C, Viola A, Dupraz M, Leake S, Eymery J, Maillard F, Richard M. Operando potential-induced strain heterogeneity of a breathing Pt nanoparticle. Acta Cryst Sect A 2022. [DOI: 10.1107/s2053273322090180] [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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Scohy M, Montella C, Claudel F, Abbou S, Dubau L, Maillard F, Sibert E, Sunde S. Investigating the oxygen evolution reaction on Ir(111) electrode in acidic medium using conventional and dynamic electrochemical impedance spectroscopy. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.07.047] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Maillard F, Rousset S, Pereira B, Boirie Y, Duclos M, Boisseau N. High-intensity interval training is more effective than moderate-intensity continuous training in reducing abdominal fat mass in postmenopausal women with type 2 diabetes: A randomized crossover study. Diabetes Metab 2018; 44:516-517. [PMID: 30243615 DOI: 10.1016/j.diabet.2018.09.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 08/23/2018] [Accepted: 09/03/2018] [Indexed: 10/28/2022]
Affiliation(s)
- F Maillard
- Université Clermont Auvergne, laboratoire des adaptations métaboliques à l'exercice en conditions physiologiques et pathologiques (AME2P), 63171 Aubière cedex, France.
| | - S Rousset
- INRA, human nutrition unit, UMR1019, 63000 Clermont-Ferrand, France; CRNH-Auvergne, 63000 Clermont-Ferrand, France.
| | - B Pereira
- University hospital Clermont-Ferrand, biostatistics unit (DRCI), 63000 Clermont-Ferrand, France.
| | - Y Boirie
- INRA, human nutrition unit, UMR1019, 63000 Clermont-Ferrand, France; Department of human nutrition, 63000 Clermont-Ferrand university hospital, G.-Montpied hospital, Clermont-Ferrand, 63000, France; UFR medicine, university Clermont 1, 63000 Clermont-Ferrand, France; CRNH-Auvergne, 63000 Clermont-Ferrand, France.
| | - M Duclos
- INRA, human nutrition unit, UMR1019, 63000 Clermont-Ferrand, France; UFR medicine, university Clermont 1, 63000 Clermont-Ferrand, France; CRNH-Auvergne, 63000 Clermont-Ferrand, France; Department of sport medicine and functional explorations, 63000 Clermont-Ferrand university hospital, G.-Montpied Hospital, Clermont-Ferrand, 63000, France.
| | - N Boisseau
- Université Clermont Auvergne, laboratoire des adaptations métaboliques à l'exercice en conditions physiologiques et pathologiques (AME2P), 63171 Aubière cedex, France; CRNH-Auvergne, 63000 Clermont-Ferrand, France.
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Lions M, Tommasino JB, Chattot R, Abeykoon B, Guillou N, Devic T, Demessence A, Cardenas L, Maillard F, Fateeva A. Insights into the mechanism of electrocatalysis of the oxygen reduction reaction by a porphyrinic metal organic framework. Chem Commun (Camb) 2017; 53:6496-6499. [DOI: 10.1039/c7cc02113e] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Insights into the mechanism of electrocatalysis of the oxygen reduction reaction by a porphyrinic metal organic framework.
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Martemianov S, Maillard F, Thomas A, Lagonotte P, Madier L. Noise diagnosis of commercial Li-ion batteries using high-order moments. RUSS J ELECTROCHEM+ 2016. [DOI: 10.1134/s1023193516120089] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Maillard F, Rousset S, Pereira B, Traore A, de Pradel Del Amaze P, Boirie Y, Duclos M, Boisseau N. High-intensity interval training reduces abdominal fat mass in postmenopausal women with type 2 diabetes. Diabetes Metab 2016; 42:433-441. [PMID: 27567125 DOI: 10.1016/j.diabet.2016.07.031] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 06/20/2016] [Accepted: 07/14/2016] [Indexed: 11/25/2022]
Abstract
AIM This study compared the effect of high-intensity interval training (HIIT) and moderate-intensity continuous training (MICT) for 16 weeks on whole-body and abdominal fat mass (FM) in postmenopausal women with type 2 diabetes (T2D). METHODS Seventeen women (69±1 years; BMI: 31±1kg.m-2) were randomly assigned to either a HIIT [60×(8s at 77-85% HRmax, 12s of active recovery)] or MICT (40min at 55-60% of their individual HRR) cycling program for 16 weeks, 2 days/week. Dual-energy X-ray absorptiometry was used to measure whole-body and regional FM content, including abdominal adiposity and visceral adipose tissue. Plasma cholesterol, HDL, LDL, triglycerides, glucose and HbA1c levels were measured. Levels of nutritional intake and physical activity were evaluated by 7-day self-reports. RESULTS Dietary energy (caloric) intake, physical activity level and total body mass did not vary in either group from the beginning to the end of the training intervention. Overall, total FM decreased and total fat-free mass significantly increased over time (by around 2-3%). Total FM reduction at the end of the intervention was not significantly different between groups. However, significant loss of total abdominal (-8.3±2.2%) and visceral (-24.2±7.7%) FM was observed only with HIIT. Time effects were noted for HbA1c and total cholesterol/HDL ratio. CONCLUSION With no concomitant caloric restriction, an HIIT program in postmenopausal women with T2D (twice a week for 16 weeks) appeared to be more effective for reducing central obesity than MICT, and could be proposed as an alternative exercise training program for this population.
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Affiliation(s)
- F Maillard
- Laboratory of the Metabolic Adaptations to Exercise under Physiological and Pathological condition (AME2P), Blaise-Pascal University, EA 3533, 63000 Clermont-Ferrand, France
| | - S Rousset
- INRA, Human Nutrition Unit UMR1019, Clermont-Ferrand, France; CRNH-Auvergne, 63000 Clermont-Ferrand, France
| | - B Pereira
- University Hospital Clermont-Ferrand, Biostatistics Unit (DRCI), 63000 Clermont-Ferrand, France
| | - A Traore
- INRA, QuaPA - UR 0370, plateforme de Résonance Magnétique des Systèmes Biologiques (RMSB), 63122 Saint-Genes-Champanelle, France
| | | | - Y Boirie
- INRA, Human Nutrition Unit UMR1019, Clermont-Ferrand, France; Department of Human Nutrition, Clermont-Ferrand University Hospital, G.-Montpied Hospital, 63000 Clermont-Ferrand, France; UFR Medicine, University Clermont 1, 63000 Clermont-Ferrand, France; CRNH-Auvergne, 63000 Clermont-Ferrand, France
| | - M Duclos
- INRA, Human Nutrition Unit UMR1019, Clermont-Ferrand, France; UFR Medicine, University Clermont 1, 63000 Clermont-Ferrand, France; CRNH-Auvergne, 63000 Clermont-Ferrand, France; Department of Sport Medicine and Functional Explorations, Clermont-Ferrand University Hospital, G.-Montpied Hospital, 63000 Clermont-Ferrand, France
| | - N Boisseau
- Laboratory of the Metabolic Adaptations to Exercise under Physiological and Pathological condition (AME2P), Blaise-Pascal University, EA 3533, 63000 Clermont-Ferrand, France; CRNH-Auvergne, 63000 Clermont-Ferrand, France.
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Martemianov S, Adiutantov N, Evdokimov YK, Madier L, Maillard F, Thomas A. New methodology of electrochemical noise analysis and applications for commercial Li-ion batteries. J Solid State Electrochem 2015. [DOI: 10.1007/s10008-015-2855-2] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [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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Maillard F, Manouvrier S, Biardeau X, Ouzzane A, Villers A. Syndrome de Lynch et risque de cancer de la prostate ; revue de la littérature. Prog Urol 2015; 25:225-32. [DOI: 10.1016/j.purol.2015.01.001] [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] [Received: 08/19/2014] [Revised: 11/30/2014] [Accepted: 01/02/2015] [Indexed: 12/21/2022]
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Guinard-Samuel V, Oderda L, Cimerman P, Maillard F, Dubern B, Tounian P. P303: Prévention de la douleur liée à la mise en place de sonde naso-gastrique chez l’enfant par l’administration de lidocaïne en nébulisation nasale. NUTR CLIN METAB 2014. [DOI: 10.1016/s0985-0562(14)70945-8] [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: 11/17/2022]
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Soldo-Olivier Y, Sibert E, Previdello B, Lafouresse M, Maillard F, De Santis M. H electro-insertion into Pd/Pt(111) nanofilms: an original method for isotherm measurement coupled to in situ surface X-ray diffraction structural study. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.06.095] [Citation(s) in RCA: 6] [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: 11/30/2022]
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Dubau L, Castanheira L, Berthomé G, Maillard F. An identical-location transmission electron microscopy study on the degradation of Pt/C nanoparticles under oxidizing, reducing and neutral atmosphere. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.03.184] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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El-Jawad M, Chemin JL, Gilles B, Maillard F. A portable transfer chamber for electrochemical measurements on electrodes prepared in ultra-high vacuum. Rev Sci Instrum 2013; 84:064101. [PMID: 23822358 DOI: 10.1063/1.4809936] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
This paper describes a versatile, light weight, and portable chamber dedicated to the transfer of electrodes from ultra-high vacuum (UHV) to atmospheric pressure and the liquid phase. This chamber can be connected to a liquid-phase reaction cell to perform electrochemical measurements and transfer back the electrode to the UHV environment. The experimental set-up can also be turned in order to make the electrode the bottom of the electrochemical cell. The validity and the efficiency of the experimental set-up were tested with a Pt(111) surface that provides unique electrochemical features in acidic sulphate-containing solution. This transfer chamber concept provides the surface science community with a new and versatile tool, complementary to existing systems, which allows fast electrolyte purging or electrochemical measurements under well-controlled mass transport conditions.
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Affiliation(s)
- M El-Jawad
- Science et Ingénierie des MAtériaux et Procédés (SIMAP), UMR 5266 CNRS∕Grenoble INP∕UJF, BP 75, 38402 Saint Martin d'Hères Cedex, France
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Tsatsaris V, Muller F, Maillard F, Delattre M, Guibourdenche J, Dreux S, Winer N, Brion DE, Goffinet F. OS039. Early prediction of preeclampsia with maternal parameters,SVEGF-R1, PLGF, Inhibin-A and PAPP-A in general population: Results from the MSPE study. Pregnancy Hypertens 2012; 2:197-8. [PMID: 26105253 DOI: 10.1016/j.preghy.2012.04.040] [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] [Indexed: 11/30/2022]
Affiliation(s)
- V Tsatsaris
- Port-Royal Cochin, Nantes, France; PremUP, Nantes, France; Paris-Descartes University, Nantes, France
| | | | | | | | | | - S Dreux
- Robert-Debré, Nantes, France
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Lamibrac A, Maranzana G, Dillet J, Lottin O, Didierjean S, Durst J, Dubau L, Maillard F, Chatenet M. Local Degradations Resulting from Repeated Start-ups and Shut-downs in Proton Exchange Membrane Fuel Cell (PEMFC). ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.egypro.2012.09.038] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [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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Dubau L, Durst J, Maillard F, Guétaz L, Chatenet M, André J, Rossinot E. Further insights into the durability of Pt3Co/C electrocatalysts: Formation of “hollow” Pt nanoparticles induced by the Kirkendall effect. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2011.03.073] [Citation(s) in RCA: 96] [Impact Index Per Article: 7.4] [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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Popowski T, Goffinet F, Batteux F, Maillard F, Kayem G. Prédiction de l’infection maternofœtale en cas de rupture prématurée des membranes par les marqueurs sériques maternels. ACTA ACUST UNITED AC 2011; 39:302-8. [DOI: 10.1016/j.gyobfe.2010.11.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2010] [Accepted: 10/26/2010] [Indexed: 12/28/2022]
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Lecerf T, Reverte I, Coleaux L, Maillard F, Favez N, Rossier J. Indice d’aptitude général et indice de compétence cognitive pour le WISC-IV : normes empiriques versus normes statistiques. European Review of Applied Psychology 2011. [DOI: 10.1016/j.erap.2011.01.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Dubau L, Maillard F, Chatenet M, André J, Rossinot E. Nanoscale compositional changes and modification of the surface reactivity of Pt3Co/C nanoparticles during proton-exchange membrane fuel cell operation. Electrochim Acta 2010. [DOI: 10.1016/j.electacta.2010.09.038] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.2] [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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Maillard F, Dubau L, Durst J, Chatenet M, André J, Rossinot E. Durability of Pt3Co/C nanoparticles in a proton-exchange membrane fuel cell: Direct evidence of bulk Co segregation to the surface. Electrochem commun 2010. [DOI: 10.1016/j.elecom.2010.06.007] [Citation(s) in RCA: 92] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Le Ray C, Maillard F, Carbonne B, Verspyck E, Cabrol D, Goffinet F. [Nifedipine or nicardipine in management of threatened preterm delivery: an observational population-based study]. ACTA ACUST UNITED AC 2010; 39:490-7. [PMID: 20627613 DOI: 10.1016/j.jgyn.2010.04.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2010] [Revised: 04/21/2010] [Accepted: 04/28/2010] [Indexed: 10/19/2022]
Abstract
OBJECTIVE For the first line tocolysis, calcium channel blockers (CCB)--oral nifedipine (Adalate®) or intravenous nicardipine (Loxen®)--are frequently used in France. No study compared nifedipine and nicardipine in management of threatened preterm delivery. From data of a French observational study, we compared factors associated with the use of nifedipine and nicardipine. Efficacy and tolerance of the two treatments were also compared. METHODS It was a secondary analysis of EVAPRIMA study, a practice survey describing management of threatened preterm delivery in 107 French maternity units. Only women who received calcium channel blockers in their first line tocolytic therapy were included. We studied obstetrical factors associated with the choice of nifedipine or nicardipine. We also analyzed factors associated with a delivery within seven days following admission using univariate and multivariate analysis. Adverse secondary effects were compared between women who received nifedipine or nicardipine. RESULTS Three hundred and four women received calcium channel blockers for their first line tocolytic therapy, in 73 maternity units: 93 (30.6%) women received oral nifedipine and 211 (69.4%) intravenous nicardipine. The same CCB was always prescribed in 69 maternity units. Admission after in utero transfer was less frequent among women who received nifedipine (6.5% versus 17.1%, P=0.01). Premature rupture of the membranes was also less frequent among women who received nifedipine (4.3% versus 13.7%, P=0.02), in comparison with women who received nicardipine. Median duration between admission for threatened preterm labor and delivery was longer when nifedipine was used (44 days versus 36 days, P=0.04). After adjustment on obstetrical factors, the risk to have a delivery within 7 days following admission was not significantly different between nifedipine and nicardipine groups (adjusted OR=0.5 [0.2-1.2]). Among women who received nifedipine only two cases (2.1%) of adverse event were reported with only one case needing a switch of treatment. Thirteen (6.2%) cases of adverse event were reported among women who received nicardipine (P=0.16); in three cases it motivated a switch. However, due to bias and limits inherent in such studies, our results should be interpreted cautiously. CONCLUSION Nicardipine is the first choice for French obstetricians in management of severe threatened preterm delivery. However, intravenous nicardipine does not increase gestational duration in comparison with oral nifedipine.
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Affiliation(s)
- C Le Ray
- Unité U953 (ex U149), recherche épidémiologique en santé périnatale et santé des femmes et des enfants, Inserm U953, université Pierre-et-Marie-Curie, 75014 Paris, France.
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Kayem G, Maillard F, Popowski T, Haddad B, Sentilhes L. Mesure de la longueur du col de l’utérus par voie endovaginale : technique et principales applications. ACTA ACUST UNITED AC 2010; 39:267-75. [PMID: 20381982 DOI: 10.1016/j.jgyn.2010.03.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2009] [Revised: 02/22/2010] [Accepted: 03/02/2010] [Indexed: 11/19/2022]
Affiliation(s)
- G Kayem
- Service de gynécologie obstétrique, centre hospitalier intercommunal de Créteil, 40, avenue de Verdun , 94000 Créteil, France.
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Concha BM, Chatenet M, Maillard F, Ticianelli EA, Lima FHB, de Lima RB. In situ infrared (FTIR) study of the mechanism of the borohydride oxidation reaction. Phys Chem Chem Phys 2010; 12:11507-16. [DOI: 10.1039/c003652h] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Kayem G, Maillard F. Rupture prématurée des membranes avant terme : attitude interventionniste ou expectative ? ACTA ACUST UNITED AC 2009; 37:334-41. [DOI: 10.1016/j.gyobfe.2009.03.007] [Citation(s) in RCA: 7] [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: 03/02/2009] [Accepted: 03/04/2009] [Indexed: 01/20/2023]
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Parant O, Maillard F, Tsatsaris V, Delattre M, Subtil D, Goffinet F. Management of threatened preterm delivery in France: a national practice survey (the EVAPRIMA study). BJOG 2009; 115:1538-46. [PMID: 19035990 DOI: 10.1111/j.1471-0528.2008.01929.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVES To describe the management of threatened preterm delivery (TPD) in France 3 years after publication of the French guidelines and to analyse the factors of variation of the practices observed. DESIGN Population-based study. SETTING Representative sample of French maternity units. The study included 107 hospitals, accounting for 20% of all French maternity units. POPULATION Women hospitalised for TPD during May 2005. METHODS Cross-sectional national practice survey. RESULTS Of the 734 admissions for TPD, 12.1% involved premature rupture of membranes and 12.9% were in utero transfers. Women admitted for TPD accounted for roughly 6% of all annual deliveries, regardless of the unit's level of care, and 42.4% of these women delivered preterm: none delivered before 32 weeks in level 1 maternity units, 11.6% in level 2 and 88.4% in level 3. Transvaginal cervical ultrasound was performed for 54.5% of the women with intact membranes. Tocolysis was administered in 87.1% of women with intact membranes, with 45.6% of such women receiving this intervention for longer than 48 hours. First-line tocolytics used were calcium channel blockers (53.7%), beta-agonists (34.7%) or atosiban (8.8%), but their distribution differed substantially according to level of care. Maintenance tocolysis was administered to 385 women (59.8%) with intact membranes. Of the women admitted before 34 weeks, 21.1% did not receive corticosteroids. CONCLUSIONS Practices for the management of TPD vary widely and appear to depend on the level of care. Some practices appear less than optimal, especially those related to duration of tocolysis, maintenance tocolysis, antenatal corticosteroid and use of cervical ultrasound.
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Affiliation(s)
- O Parant
- Services de Gynécologie Obstétrique, Hôpital Paule-de-Viguier, Toulouse, France
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Schmitz T, Kayem G, Maillard F, Lebret MT, Cabrol D, Goffinet F. Selective use of sonographic cervical length measurement for predicting imminent preterm delivery in women with preterm labor and intact membranes. Ultrasound Obstet Gynecol 2008; 31:421-426. [PMID: 18383461 DOI: 10.1002/uog.5297] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
OBJECTIVES To determine, in a population of women with preterm labor and intact membranes, whether ultrasound cervical length measurement performed only in patients selected according to the Bishop score predicts imminent preterm delivery better than does systematic cervical length measurement in the entire population. METHODS The Bishop score and sonographic cervical length were recorded prospectively in women with preterm labor between 24 and 34 completed weeks' gestation. Outcome measures were preterm delivery within 48 h and within 7 days. Predictive values were calculated for each marker separately and then in combination. RESULTS Of the study population of 395 women, 17 (4.3%) and 32 (8.1%) delivered within 48 h and within 7 days, respectively, following inclusion. For delivery within 7 days, areas under the Bishop score (0.848) and sonographic cervical length (0.813) receiver-operating characteristics curves did not differ significantly. For the selective use of sonographic cervical length measurement in patients selected according to the Bishop score, the test was considered positive if the Bishop score was >or= 8, or 4-7 with cervical length <or= 30 mm. This test was as sensitive (94%) but more specific (60% vs. 42%, P < 0.001) for predicting preterm birth within 7 days than was sonographic cervical length with a 30-mm cut-off value in the entire population. Results were similar for delivery within 48 h. CONCLUSION For predicting imminent preterm delivery in women with preterm labor, measuring sonographic cervical length only in patients with a Bishop score between 4 and 7, compared with a strategy of systematic measurement in the entire population, reduces by 30% the number of false positives and might thus decrease unnecessary therapeutic intervention.
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Affiliation(s)
- T Schmitz
- Maternité Port-Royal, Hopital Cochin, AP-HP, Université Paris Descartes, Paris, France.
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Hahn F, Mathis YL, Bonnefont A, Maillard F, Melendres CA. In situ synchrotron far-infrared spectromicroscopy of a copper electrode at grazing incidence angle. J Synchrotron Radiat 2007; 14:446-8. [PMID: 17717388 DOI: 10.1107/s0909049507029809] [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] [Received: 11/24/2006] [Accepted: 06/18/2007] [Indexed: 05/16/2023]
Abstract
Synchrotron far-infrared spectroscopy in situ was successfully carried out on a copper microelectrode using a grazing-angle objective attached to a Bruker IRscope II microscope. The thin-layer spectroelectrochemical cell was constructed out of Teflon and fitted with a 20 microm-thick Mylar window; the copper electrode was 500 microm in diameter. Measurements were carried out in 0.1 M NaOH solution as a function of applied potential between -1.4 and 0 V versus a Hg/Hg2SO(4) reference electrode. Results demonstrate that with the present technique it is possible to obtain in situ spectra with excellent signal-to-noise ratio for surface oxide films formed electrochemically with less than 1 nL of active solution volume. The surface film on copper at 0 V consisted mainly of CuO with possibly some Cu(OH)2 also present. This interpretation is consistent with previous works and thermodynamic calculations.
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Affiliation(s)
- F Hahn
- UMR 6503, CNRS, Université de Poitiers, 40 avenue du Recteur Pineau, F-86022 Poitiers, France
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Maillard F, Peyrelade E, Soldo-Olivier Y, Chatenet M, Chaînet E, Faure R. Is carbon-supported Pt-WOx composite a CO-tolerant material? Electrochim Acta 2007. [DOI: 10.1016/j.electacta.2006.08.024] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Vayssière C, Favre R, Audibert F, Chauvet MP, Gaucherand P, Tardif D, Grangé G, Novoa A, Descamps P, Perdu M, Andrini E, Janse-Marec J, Maillard F, Nisand I. Cervical assessment at 22 and 27 weeks for the prediction of spontaneous birth before 34 weeks in twin pregnancies: is transvaginal sonography more accurate than digital examination? Ultrasound Obstet Gynecol 2005; 26:707-12. [PMID: 16273595 DOI: 10.1002/uog.2616] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
OBJECTIVES This study compared the accuracy of ultrasound cervical assessment (cervical length and cervical index) and digital examination (Bishop score and cervical score) in the prediction of spontaneous birth before 34 weeks in twin pregnancies. METHODS In a prospective multicenter study, digital examination and transvaginal sonography were performed consecutively in twin pregnancies attending for routine sonography at either 22 weeks (175 women) or 27 weeks (153 women). The digital examination took place first, and the Bishop score and cervical score (cervical length minus cervical dilatation) were calculated. Ultrasound measurements were then made of cervical length and funnel length to yield the cervical index (1 + funnel length/cervical length). The association between each variable and delivery before 34 weeks was tested by the Mann-Whitney U-test. The receiver-operating characteristics (ROC) curves of the ultrasound and digital indicators were determined for both gestational age periods, and the areas under the ROC curves compared. The best cut-off values for each indicator were used to determine predictive values for delivery before 34 weeks. RESULTS The median gestational age at delivery among the women included in the 22-week examination period was 36.0 (range, 21-40) weeks; 10.9% (19) gave birth spontaneously before 34 weeks. The median cervical length was 40 (range, 6-65) mm. All four parameters were predictors of delivery before 34 weeks. The areas under the ROC curves for cervical index, cervical length, Bishop score and cervical score did not differ significantly. The median gestational age at delivery among the women in the 27-week examination period was 36.0 (range, 27-40) weeks; 9.2% (14) gave birth spontaneously before 34 weeks. The median cervical length was 35 (range, 1-57) mm. All parameters except the Bishop score were predictors of delivery before 34 weeks. The likelihood ratio of the positive and negative tests for cervical length < or = 25 mm was 5.4 (range, 3.2-9.0) and 0.3 (range, 0.1-0.7), respectively, compared with 2.3 (range, 1.3-4.2) and 0.6 (range, 0.3-1.1), respectively, for cervical score < or = 1. The area under the curve for the cervical index was significantly larger than that for the Bishop score (P = 0.008) or cervical score (P = 0.02). CONCLUSION Transvaginal sonography predicted spontaneous delivery before 34 weeks better than digital examination at the 27-week but not the 22-week examination.
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Affiliation(s)
- C Vayssière
- Department of Obstetrics and Gynecology, CHI Leon Touhladjian, Paris V University, Poissy, France.
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Maillard F, Lu GQ, Wieckowski A, Stimming U. Ru-Decorated Pt Surfaces as Model Fuel Cell Electrocatalysts for CO Electrooxidation. J Phys Chem B 2005; 109:16230-43. [PMID: 16853064 DOI: 10.1021/jp052277x] [Citation(s) in RCA: 221] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This feature article concerns Pt surfaces modified (decorated) by ruthenium as model fuel cell electrocatalysts for electrooxidation processes. This work reveals the role of ruthenium promoters in enhancing electrocatalytic activity toward organic fuels for fuel cells, and it particularly concerns the methanol decomposition product, surface CO. A special focus is on surface mobility of the CO as it is catalytically oxidized to CO(2). Different methods used to prepare Ru-decorated Pt single crystal surfaces as well as Ru-decorated Pt nanoparticles are reviewed, and the methods of characterization and testing of their activity are discussed. The focus is on the origin of peak splitting involved in the voltammetric electrooxidation of CO on Ru-decorated Pt surfaces, and on the interpretative consequences of the splitting for single crystal and nanoparticle Pt/Ru bimetallic surfaces. Apparently, screening through the literature allows formulating several models of the CO stripping reaction, and the validity of these models is discussed. Major efforts are made in this article to compare the results reported by the Urbana-Champaign group and the Munich group, but also by other groups. As electrocatalysis is progressively more and more driven by theory, our review of the experimental findings may serve to summarize the state of the art and clarify the roads ahead. Future studies will deal with highly dispersed and reactive nanoscale surfaces and other more advanced catalytic materials for fuel cell catalysis and related energy applications. It is expected that the metal/metal and metal/substrate interactions will be increasingly investigated on atomic and electronic levels, with likewise increasing participation of theory, and the structure and reactivity of various monolayer catalytic systems involving more than two metals (that is ternary and quaternary systems) will be interrogated.
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Affiliation(s)
- F Maillard
- Laboratoire d'Electrochimie et de Physicochimie des Matériaux et des Interfaces, UMR CNRS 5631, ENSEEG, BP75, 38402 Saint Martin d'Hères, France
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Maillard F, Schreier S, Hanzlik M, Savinova ER, Weinkauf S, Stimming U. Influence of particle agglomeration on the catalytic activity of carbon-supported Pt nanoparticles in CO monolayer oxidation. Phys Chem Chem Phys 2005. [DOI: 10.1039/b411377b] [Citation(s) in RCA: 334] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Kayem G, Maillard F, Batteux F, Weill B, Cabrol D, Goffinet F. Interleukin-8 mRNA in vaginal secretions: a prenatal marker of congenital infection in case of preterm labor with intact membranes. Prenat Diagn 2004; 24:58-62. [PMID: 14755411 DOI: 10.1002/pd.795] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE To study whether interleukin-8 (IL-8) mRNA in vaginal secretions is associated with congenital infection and preterm delivery in the case of preterm labor with intact membranes. METHODS This prospective clinical study in a tertiary referral center included 280 patients who gave birth to 360 infants from 1997 through 1999. IL-8 mRNA in vaginal secretions was determined with reverse transcriptase polymerase chain reaction. Logistic regression was used to examine the association between vaginal IL-8 mRNA and congenital infection independently of the time of birth. Main outcome measures were congenital infection and delivery before 37 and 33 weeks' gestation. RESULTS A total of 100 women (100/280 (35.7%)) gave birth before 37 weeks. A total of 54 children (54/360 (15%)) had congenital infection. IL-8 mRNA in vaginal secretions was associated with delivery within 14 days of the sampling (24 (15.6%) vs. 7 (5.6%) p < 0.01), but not with delivery within 48 h, 7 days (p = 0.07) or before 37 or 33 weeks. There were more congenital infections in the group with detectable IL-8 mRNA (37 (19.3%) than in the negative group (17 (10.1%); p < 0.05). IL-8 mRNA was associated with congenital infection independently of the time of birth (OR: 2.6 (1.3-5.1)). This test had a sensitivity for predicting neonatal infection of 69%. Its specificity was 49%, its positive predictive value 19%, and its negative predictive value 90%. CONCLUSION IL-8 mRNA could be a prenatal noninvasive vaginal marker of congenital infection.
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Affiliation(s)
- G Kayem
- Department of Obstetrics and Gynaecology, Maternity Port-Royal, Cochin-Saint Vincent-de-Paul Hospital APHP, René Descartes University (Paris V), Paris, France.
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Larroque B, Bréart G, Kaminski M, Dehan M, André M, Burguet A, Grandjean H, Ledésert B, Lévêque C, Maillard F, Matis J, Rozé JC, Truffert P. Survival of very preterm infants: Epipage, a population based cohort study. Arch Dis Child Fetal Neonatal Ed 2004; 89:F139-44. [PMID: 14977898 PMCID: PMC1756022 DOI: 10.1136/adc.2002.020396] [Citation(s) in RCA: 243] [Impact Index Per Article: 12.2] [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] [Indexed: 11/03/2022]
Abstract
OBJECTIVE To evaluate the outcome for all infants born before 33 weeks gestation until discharge from hospital. DESIGN A prospective observational population based study. SETTING Nine regions of France in 1997. PATIENTS All births or late terminations of pregnancy for fetal or maternal reasons between 22 and 32 weeks gestation. MAIN OUTCOME MEASURE Life status: stillbirth, live birth, death in delivery room, death in intensive care, decision to limit intensive care, survival to discharge. RESULTS A total of 722 late terminations, 772 stillbirths, and 2901 live births were recorded. The incidence of very preterm births was 1.3 per 100 live births and stillbirths. The survival rate for births between 22 and 32 weeks was 67% of all births (including stillbirths), 85% of live births, and 89% of infants admitted to neonatal intensive care units. Survival increased with gestational age: 31% of all infants born alive at 24 weeks survived to discharge, 78% at 28 weeks, and 97% at 32 weeks. Survival among live births was lower for small for gestational age infants, multiple births, and boys. Overall, 50% of deaths after birth followed decisions to withhold or withdraw intensive care: 66% of deaths in the delivery room, decreasing with increasing gestational age; 44% of deaths in the neonatal intensive care unit, with little variation with gestational age. CONCLUSION Among very preterm babies, chances of survival varies greatly according to the length of gestation. At all gestational ages, a large proportion of deaths are associated with a decision to limit intensive care.
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Affiliation(s)
- B Larroque
- Epidemiological Research Unit on Perinatal and Women's Health, U149 INSERM Villejuif, France.
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Maillard F, Eikerling M, Cherstiouk OV, Schreier S, Savinova E, Stimming U. Size effects on reactivity of Pt nanoparticles in CO monolayer oxidation: The role of surface mobility. Faraday Discuss 2004; 125:357-77; discussion 391-407. [PMID: 14750681 DOI: 10.1039/b303911k] [Citation(s) in RCA: 361] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In the present paper we study the reactivity of model Pt nanoparticles supported on glassy carbon. The particle size effect is rationalized for CO monolayer oxidation exploring electrochemical methods (stripping voltammetry and chronoamperometry) and modelling. Significant size effects are observed in the particle size interval from ca. 1 to 4 nm, including the positive shift of the CO stripping peak with decreasing particle size and a pronounced asymmetry of the current transients at constant potential. The latter go through a maximum at low COads conversion and exhibit tailing, which is the longer the smaller the particle size. Neither mean field nor nucleation & growth models give a coherent explanation of these experimental findings. We, therefore, suggest a basic model employing the active site concept. With a number of reasonable simplifications a full analytical solution is obtained, which allows a straightforward comparison of the theory with the experimental data. A good correspondence between experiment and theory is demonstrated. The model suggests restricted COads mobility at Pt nanoparticles below ca. 2 nm size, with the diffusion coefficient strongly dependent on the particle size, and indicates a transition towards fast diffusion when the particle size exceeds ca. 3 nm. Estimates of relevant kinetic parameters, including diffusion coefficient, reaction constant etc. are obtained and compared to the literature data for extended Pt surfaces.
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Affiliation(s)
- F Maillard
- Department of Physics E19, Technische Universität München, D-85748, Garching, Germany
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Goffinet F, Maillard F, Mihoubi N, Kayem G, Papiernik E, Cabrol D, Paul G. Bacterial vaginosis: prevalence and predictive value for premature delivery and neonatal infection in women with preterm labour and intact membranes. Eur J Obstet Gynecol Reprod Biol 2003; 108:146-51. [PMID: 12781402 DOI: 10.1016/s0301-2115(02)00423-2] [Citation(s) in RCA: 38] [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] [Indexed: 11/17/2022]
Abstract
OBJECTIVES Assess the predictive values of bacterial vaginosis (BV) for preterm delivery (PD) and neonatal infection and compare them with standard markers of infection among women with preterm labour (PL). STUDY DESIGN Prospective blinded study in a tertiary referral centre in Paris. Women hospitalised for PL with intact membranes at a term between 24 and 34 weeks were included. Vaginal fluid, collected at inclusion was Gram-stained, scored, and interpreted according to Nugent's criteria. RESULTS Out of 354 women tested, 254 had normal flora (72.3%), 76 intermediate (21.7%) and 24 BV (6.8%). A history of spontaneous miscarriage after 14 weeks was the only risk factor significantly associated with BV. BV was not significantly associated with PD<35 weeks or neonatal infection. Very preterm delivery (before 33 weeks) was significantly associated with the flora grade (P=0.02): women with normal, intermediate and abnormal flora, respectively had 27 (10.6%), 14 (18.4%) and 6 (25.0%) births before 33 weeks. Of the markers tested, the highest risk of very preterm delivery was associated with BV (odds ratio 2.95, 95% CI (1.1-0.8.1)) and CRP>20mg/dl (4.23 95% CI (1.8-9.7)). Predictive value of BV for preterm birth before 33 weeks were: sensitivity 12.8%, specificity 95.0%, positive predictive value 35.3%, and negative predictive value 84.3%. CONCLUSIONS The frequency of BV and its association with PD are probably very variable and must be interpreted differently from one population to another. While we found an association between BV results and delivery before 33 weeks, the predictive value of BV was disappointing. Although these findings reinforce the importance of a useful marker of subclinical infection, the usefulness of testing for BV in women with PL has not been demonstrated.
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Affiliation(s)
- F Goffinet
- Department of Obstetrics and Gynaecology, Maternity Port-Royal, Cochin-Saint Vincent-de-Paul hospital, University Paris V, 123 Bd de Port-Royal, 75014, Paris, France.
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Trébéden H, Goffinet F, Kayem G, Maillard F, Lemoine E, Cabrol D, Weill B, Batteux F. Strip test for bedside detection of interleukin-6 in cervical secretions is predictive for impending preterm delivery. Eur Cytokine Netw 2001; 12:359-60. [PMID: 11399526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
Inflammatory cytokines in amniotic fluid are markers of prematurity which could characterize preterm labour of infectious origin. To avoid amniocentesis, we analyzed IL-6, IL-8, IL-10, and IL-13 by RT-PCR in cervical secretions (CS) of 307 women with preterm labour. IL-6 was detected in 26.3% patients who delivered at less than 34 weeks (specificity: 95.8%). In addition, IL-6 was associated with delivery within 7 days (specificity: 91.6%). To render the detection more rapid and cheaper, a strip test was designed and evaluated comparatively with RT-PCR in 76 women. This bedside strip test was twice more sensitive than RT-PCR, with little decrease in specificity.
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Affiliation(s)
- H Trébéden
- Laboratoire d'Immunologie, Faculté Cochin, Université Paris-V, AP-HP, France
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Goffinet F, Maillard F, Fulla Y, Cabrol D. Biochemical markers (without markers of infection) of the risk of preterm delivery. Implications for clinical practice. Eur J Obstet Gynecol Reprod Biol 2001; 94:59-68. [PMID: 11134827 DOI: 10.1016/s0301-2115(00)00317-1] [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: 10/18/2022]
Abstract
BACKGROUND New biochemical markers for the risk of spontaneous preterm birth (SPB) give a more precise and earlier diagnosis than the usual ones. We reviewed the data about the principal markers. RESULTS Using studies with good methodology and a large number of subjects, we observe that the predictive value of these new markers is somewhat higher than those of the usual markers. Fetal fibro-nectin (FNf) and cervical ultrasound undeniably improve the identification of patients at risk of preterm birth, both in the general population and in these threatened preterm delivery. However no management has yet been demonstrated efficacious, especially in a general population so any recommendations for their systematic utilisation is premature. Other biochemical markers (salivary estriol, serum CRH, etc.) are still under assessment and should not be used outside research protocols. IMPLICATION FOR PRACTICE It is appropriate to integrate either FNf or cervical ultrasound into daily clinical practice for patients with signs of preterm labor. These new indicators are of special use when the diagnosis is uncertain with the standard markers (uterine contractions, digital examination). Among these patients, they should reduce the number of hospitalizations and of useless treatments, because of their good negative predictive value. At the same time, for patients poorly 'labeled' by the clinical examination, they should allow the application of intensive management (intravenous tocolysis, corticoids, in utero transfers). CONCLUSION Future studies should evaluate these tests in everyday practice. The objective is not to predict preterm birth but to prevent either it or its negative consequences. This goal will be met when we have an effective treatment, without associated adverse effects, to offer patients after a positive test result.
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Affiliation(s)
- F Goffinet
- Department of Obstetrics and Gynecology, Maternity Port-Royal, Cochin-Saint Vincent-de-Paul Hospital, 123 Bd de Port-Royal, 75014, Paris, France.
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Fraser W, Hatem-Asmar M, Krauss I, Maillard F, Bréart G, Blais R. Comparison of midwifery care to medical care in hospitals in the Quebec pilot projects study: clinical indicators. L'Equipe dEvaluation des Projets-Pilotes Sages-Femmes. Can J Public Health 2000; 91:I5-11. [PMID: 10765581 PMCID: PMC6980069] [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: 02/16/2023]
Abstract
The purpose of this study was to compare indicators of process and outcome of midwifery services provided in the Quebec pilot projects to those associated with standard hospital-based medical services. Women receiving each type of care (961 per group) were matched on the basis of socio-demographic characteristics and level of obstetrical risk. We found midwifery care to be associated with less obstetrical intervention and a reduction in selected indicators of maternal morbidity (caesarean section and severe perineal injury). For neonatal outcome indicators, midwifery care was associated with a mixture of benefits and risks: fewer babies with preterm birth and low birthweight, but a trend toward a higher stillbirth ratio and more frequent requirement for neonatal resuscitation. The study design does not permit to conclude that the associations were causal in nature. However, the high stillbirth rate observed in the group of women who were selected for midwife care raises concerns both regarding the appropriateness of the screening procedures for admission to such care and regarding the quality of care itself.
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Affiliation(s)
- W Fraser
- Département d'obstétrique et de gynécologie, Université, Laval CHUQ.
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Carbonne B, Langer B, Goffinet F, Audibert F, Tardif D, Le Goueff F, Laville M, Maillard F. [Clinical importance of fetal pulse oximetry. II. Comparative predictive values of oximetry and scalp pH. Multicenter study]. J Gynecol Obstet Biol Reprod (Paris) 1999; 28:137-44. [PMID: 10416140] [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: 02/13/2023]
Abstract
OBJECTIVE To compare the predictive value of intrapartum fetal pulse oximetry to that of fetal blood analysis for an abnormal neonatal outcome in case of abnormal fetal heart rate (FHR). STUDY DESIGN A prospective multicenter observational study, from June 1994 to November 1995. Fetal oxygen saturation was continuously recorded using a Nellcor N-400 fetal pulse oximeter in case of abnormal FHR during labor. Simultaneous readings of fetal oxygen saturation and fetal blood analysis obtained before birth, i.e. either at full dilatation, or before cesarean section when indicated, were compared with the neonatal status. The criteria for an abnormal neonatal outcome were 1) an umbilical arterial blood pH < or = 7.15 and 2) a combined variable including: 5 min. Apgar score < or = 7, umbilical arterial pH < or = 7.15, secondary respiratory distress, transfer in a neonatal care unit, or neonatal death. RESULTS At a 7.20 threshold for fetal scalp pH, and 30% for fetal oxygen saturation (i.e. the tenth centile in the study population), the predictive value of fetal pulse oximetry was similar to that of fetal blood analysis for an arterial umbilical pH < or = 7.15, and for an abnormal neonatal outcome (positive predictive value 56% vs 55%, negative predictive value 81% vs 82%, sensitivity 29% vs 35%, and specificity 93% vs 91% respectively). The receiver operating curve showed similar performance of either technique for cut-off values < or = 7.20 for fetal blood pH and < or = 30% for fetal oxygen saturation, whereas fetal pulse oximetry became superior at higher thresholds. CONCLUSION The predictive value of intrapartum fetal pulse oximetry can be favorably compared with that of fetal blood analysis. Randomized controlled management trials can now be performed to assess potential clinical benefits of this new tool.
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Abstract
An evaluator blinded to gestational age (GA) assessed a cohort of 397 singletons born at between 37 and 41 week's gestation, by looking at 11 criteria exploring neurological maturity and 12 criteria exploring physical maturity. The analysis of correlation coefficients shows various degrees of association between GA and each of the criteria examined. A highly significant correlation (p < 0.001) was found for 4 neurological criteria defining passive tone in limbs and sucking reflex. The activity of flexor muscles of the neck and crossed extension reflex were also associated with maturity but weakly (p < 0.01). A highly significant correlation (p < 0.001) was found for 8 of the physical criteria, skin colour and texture, lanugo, ear firmness, genitalia, breast size, nipple formation and plantar skin creases. Oedema, skull firmness and ear form were also associated but weakly. With multivariate analysis combining the neurological and physical criteria, predictive values ranked in the following order: 1) plantar skin, 2) breast size, 3) sucking reflex, 4) scarf sign, 5) skin colour, 6) genitalia, 7) popliteal angle, 8) return to flexion of forearms, 9) dorsiflexion angle. In conclusion, a score based on physical and neurological criteria is associated with duration of pregnancy (r2 = 0.32) between 37 and 41 weeks' gestation. Such an instrument allows us to study fetal maturity as a variable independent of GA, and therefore makes it possible to identify various influences that may modify maturational rate during the last weeks of pregnancy.
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Affiliation(s)
- C Amiel-Tison
- Department of Paediatrics, PARIS V School of Medicine, France
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Goffinet F, Langer B, Carbonne B, Audibert F, Tardif D, Berkane N, Le Goueff F, Laville M, Maillard F. [Clinical importance of fetal pulse oximetry. I. Methodological evaluation. Multicenter study. French Study Group on Oximetry of Fetal Pulse]. J Gynecol Obstet Biol Reprod (Paris) 1999; 28:31-40. [PMID: 10394514] [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: 02/13/2023]
Abstract
OBJECTIVE To evaluate the feasibility of intrapartum fetal pulse oximetry, the distribution of fetal oxygen saturation values, and the relation with the neonatal outcome in a population with an abnormal fetal heart rate (FHR). STUDY DESIGN A prospective multicenter observational study, from June 1994 to November 1995. Fetal oxygen saturation was continuously recorded using a Nellcor N-400 fetal pulse oximeter in case of abnormal FHR during labor. Simultaneous readings of fetal oxygen saturation and of fetal blood analysis (FBA) were obtained at inclusion and before birth. Feasibility, adverse effects, distribution of fetal oxygen saturation values and relation with neonatal outcome were assessed. RESULTS 74 patients were included. From 172 attempted sensor placements, the procedure was impossible in three cases and fetal oxygen saturation values were obtained in 164 cases (95.3%). Physicians considered sensor placement an easier task than FBA attempt (easy in 87.5% vs 78.9% for FBA, p = 0.03). The mean reliable signal time (+/- SD) was 64.7 +/- 32% during the first stage. There were no serious adverse effects in the study population. The mean fetal oxygen saturation during the first stage of labor was 42.2 +/- 8.0% (10th-90th centile range: 30-53%). Fetal oxygen saturation was significantly correlated with scalp pH (r = 0.29; p = 0.01) but not with neonatal umbilical artery pH or gas values. There was a significant association between a low fetal oxygen saturation (< 30%) and a poor neonatal condition. CONCLUSION The feasibility of fetal pulse oximetry is satisfactory in clinical practice. It is easy to use and provides a fair rate of recorded values, even in a population with suspicion of fetal distress. A low fetal oxygen saturation is significantly associated with an abnormal neonatal outcome.
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Goffinet F, Langer B, Carbonne B, Berkane N, Tardif D, Le Goueff F, Laville M, Maillard F. Multicenter study on the clinical value of fetal pulse oximetry. I. Methodologic evaluation. The French Study Group on Fetal Pulse Oximetry. Am J Obstet Gynecol 1997; 177:1238-46. [PMID: 9396924 DOI: 10.1016/s0002-9378(97)70045-0] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
OBJECTIVE Our purpose was to evaluate the feasibility of intrapartum fetal pulse oximetry, the distribution of fetal oxygen saturation values, and the relationship with the neonatal outcome in a population with an abnormal fetal heart rate. STUDY DESIGN A prospective multicenter observational study was performed from June 1994 to November 1995. Fetal oxygen saturation was continuously recorded with use of a Nellcor N-400 fetal pulse oximeter in case of an abnormal fetal heart rate during labor. Simultaneous readings of fetal oxygen saturation and fetal blood analysis were obtained at inclusion and before birth. Feasibility, adverse effects, distribution of fetal oxygen saturation values, and relationship with neonatal outcome were assessed. RESULTS One hundred seventy-four patients were included. From 172 attempted sensor placements, the procedure was impossible in three cases and fetal oxygen saturation values were obtained in 164 cases (95.3%). Physicians considered sensor placement an easier task than an attempt at fetal blood analysis (easy in 87.5% vs 78.9% for fetal blood analysis, p = 0.03). The mean reliable signal time (+/- SD) was 64.7% +/- 32% during the first stage. There were no serious adverse effects in the study population. The mean fetal oxygen saturation during the first stage of labor was 42.2% +/- 8.0% (10th to 90th percentile range 30% to 53%). Fetal oxygen saturation was significantly correlated with scalp pH (r = 0.29, p = 0.01) but not with neonatal umbilical artery pH or gas values. There was a significant association between low fetal oxygen saturation (< 30%) and poor neonatal condition. CONCLUSION The feasibility of fetal pulse oximetry is satisfactory in clinical practice. It is easy to use and provides a fair rate of recorded values, even in a population with suspicion of fetal distress. A low fetal oxygen saturation is significantly associated with an abnormal neonatal outcome.
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Affiliation(s)
- F Goffinet
- Institut National de la Santé et de la Recherche Médicale U 149, Paris, France
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Carbonne B, Langer B, Goffinet F, Audibert F, Tardif D, Le Goueff F, Laville M, Maillard F. Multicenter study on the clinical value of fetal pulse oximetry. II. Compared predictive values of pulse oximetry and fetal blood analysis. The French Study Group on Fetal Pulse Oximetry. Am J Obstet Gynecol 1997; 177:593-8. [PMID: 9322629 DOI: 10.1016/s0002-9378(97)70151-0] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
OBJECTIVE Our purpose was to compare the predictive value of intrapartum fetal pulse oximetry with that of fetal blood analysis for an abnormal neonatal outcome in case of an abnormal fetal heart rate. STUDY DESIGN A prospective multicenter observational study was conducted from June 1994 to November 1995. Fetal oxygen saturation was continuously recorded with a Nellcor N-400 fetal pulse oximeter in case of an abnormal fetal heart rate during labor. Simultaneous readings of fetal oxygen saturation and fetal blood analysis obtained before birth (i.e., either at full dilatation or before cesarean section when indicated) were compared with the neonatal status. The criteria for an abnormal neonatal outcome were (1) an umbilical arterial blood pH < or = 7.15 and (2) a combined variable including 5-minute Apgar score < or = 7, umbilical arterial pH < or = 7.15, secondary respiratory distress, transfer in a neonatal care unit, or neonatal death. RESULTS At a 7.20 threshold for fetal scalp pH and 30% for fetal oxygen saturation (i.e., the 10th percentile in the study population), the predictive value of fetal pulse oximetry was similar to that of fetal blood analysis for an arterial umbilical pH < or = 7.15 and for an abnormal neonatal outcome (positive predictive value 56% vs 55%, negative predictive value 81% vs 82%, sensitivity 29% vs 35%, and specificity 93% vs 91%, respectively). The receiver-operator characteristic curve showed similar performance of either technique for cutoff values < or = 7.20 for fetal blood pH and < or = 30% for fetal oxygen saturation, whereas fetal pulse oximetry became superior at higher thresholds. CONCLUSION The predictive value of intrapartum fetal pulse oximetry can be favorably compared with that of fetal blood analysis. Randomized controlled management trials can now be performed to assess potential clinical benefits of this new tool.
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Affiliation(s)
- B Carbonne
- Maternité Port Royal-Baudelocque, Services de Gynécologie-Obstétrique, Paris, France
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Maillard F. Pidotimod. A new biological response modifier. Introduction. Arzneimittelforschung 1994; 44:1399-401. [PMID: 7857330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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Job JC, Maillard F, Goujard J. Epidemiologic survey of patients treated with growth hormone in France in the period 1959-1990: preliminary results. Horm Res 1992; 38 Suppl 1:35-43. [PMID: 1295811 DOI: 10.1159/000182568] [Citation(s) in RCA: 9] [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] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Because the delivery of growth hormone (GH) was centralized from 1977 in France, it has been possible to conduct, during the second half of 1990, a nationwide survey of the health status of patients treated with GH from the year 1959. A questionnaire regarding the 5,546 patients recorded for the period 1959-1990 was sent to the prescribers or the patients. 5,418 more or less completely documented reports were obtained. The mean age of the patients at the onset of GH treatment was 11.0 +/- 4.1 years. 1,937 of them had at this time some important disease associated with GH deficiency. The mean duration of treatment was 3.99 +/- 3.05 years. 3,446 patients were still under follow-up. Very recent information (1990-1991) was given for 82.7% of patients, less recent data (1985-1989) for 13.4%. For 3.9%, no data beyond 1985 were obtained. 77 patients had died, 38 from neoplastic disease (mainly recurrence of a primary malignancy), 10 from accident, 3 by suicide, 7 with neurological disease [only 1 case of Creutzfeldt-Jakob disease (CJD) was reported at the time of the survey], the others from various causes. No abnormal frequency of posttreatment leukemia, lymphoma, malignancies, hip diseases, glucose intolerance or other disease focusing attention, was found in the survey. From the time when this survey was completed (December 1990) to that of this report (May 1992), other cases of CJD have been reported in France: 3 ascertained, 7 clinically resembling but not yet certain. These 10 patients were treated for complete GH deficiency, 6 of congenital or neonatal cause and 4 after neurosurgery.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- J C Job
- Association France Hypophyse, Paris, France
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Facklam T, Maillard F, Nguyen D. [Characteristics of human growth hormone produced by genetically engineered mammalian cells]. Cesk Pediatr 1991; 46:518-21. [PMID: 1806262] [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: 12/28/2022]
Abstract
Saizen is human growth hormone produced by mammalian cells by genetic engineering. It is identical with hypophyseal GH as regards various physical and chemical parameters. A number of tests did not reveal an alien protein at the 1 ppm level, nor the presence of viruses, and the DNA level is below the detection range. According to these results Saizen is a highly purified growth hormone.
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Affiliation(s)
- T Facklam
- Ares Serono, Svýcarsko a Laboratore Serono, Svýcarsko
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