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Couratin C, Velten P, Fléchard X, Liénard E, Ban G, Cassimi A, Delahaye P, Durand D, Hennecart D, Mauger F, Méry A, Naviliat-Cuncic O, Patyk Z, Rodríguez D, Siegień-Iwaniuk K, Thomas JC. First measurement of pure electron shakeoff in the β decay of trapped 6He+ ions. PHYSICAL REVIEW LETTERS 2012; 108:243201. [PMID: 23004268 DOI: 10.1103/physrevlett.108.243201] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2012] [Indexed: 06/01/2023]
Abstract
The electron shakeoff probability of 6Li2+ ions resulting from the β- decay of 6He+ ions has been measured with high precision using a specially designed recoil ion spectrometer. This is the first measurement of a pure electron shakeoff following nuclear β decay, not affected by multielectron processes such as Auger cascades. In this ideal textbook case for the application of the sudden approximation, the experimental ionization probability was found to be P(so)(exp)=0.02339(36) in perfect agreement with simple quantum mechanical calculations.
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102
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Boudes M, Lazar N, Graille M, Durand D, Gaidenko TA, Stewart V, van Tilbeurgh H. The structure of the NasR transcription antiterminator reveals a one-component system with a NIT nitrate receptor coupled to an ANTAR RNA-binding effector. Mol Microbiol 2012; 85:431-44. [PMID: 22690729 DOI: 10.1111/j.1365-2958.2012.08111.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The nitrate- and nitrite-sensing NIT domain is present in diverse signal-transduction proteins across a wide range of bacterial species. NIT domain function was established through analysis of the Klebsiella oxytoca NasR protein, which controls expression of the nasF operon encoding enzymes for nitrite and nitrate assimilation. In the presence of nitrate or nitrite, the NasR protein inhibits transcription termination at the factor-independent terminator site in the nasF operon transcribed leader region. We present here the crystal structure of the intact NasR protein in the apo state. The dimeric all-helical protein contains a large amino-terminal NIT domain that associates two four-helix bundles, and a carboxyl-terminal ANTAR (AmiR and NasR transcription antitermination regulator) domain. The analysis reveals unexpectedly that the NIT domain is structurally similar to the periplasmic input domain of the NarX two-component sensor that regulates nitrate and nitrite respiration. This similarity suggests that the NIT domain binds nitrate and nitrite between two invariant arginyl residues located on adjacent alpha helices, and results from site-specific mutagenesis showed that these residues are critical for NasR function. The resulting structural movements in the NIT domain would provoke an active configuration of the ANTAR domains necessary for specific leader mRNA binding.
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103
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Durand D, Landmann N, Piosczyk H, Holz J, Riemann D, Voderholzer U, Nissen C. Auswirkungen von Medienkonsum auf Schlaf bei Kindern und Jugendlichen. SOMNOLOGIE 2012. [DOI: 10.1007/s11818-012-0559-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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104
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Durand D, Li de la Sierra-Gallay I, Brooks MA, Thompson AW, Lazar N, Lisboa J, van Tilbeurgh H, Quevillon-Cheruel S. Expression, purification and preliminary structural analysis of Escherichia coli MatP in complex with the matS DNA site. Acta Crystallogr Sect F Struct Biol Cryst Commun 2012; 68:638-43. [PMID: 22684059 DOI: 10.1107/s1744309112011062] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2012] [Accepted: 03/13/2012] [Indexed: 11/10/2022]
Abstract
The Escherichia coli chromosome is organized into four macrodomains which are found in the replication-origin region (Ori), at the terminus (Ter) and on both its sides (Right and Left). The localization of the macrodomains is subject to programmed changes during the cell cycle. The compaction of the 800 kb Ter macrodomain relies on the binding of the MatP protein to a 13 bp matS motif repeated 23 times. MatP is a small DNA-binding protein of about 18 kDa that shares homology in its C-terminal region with the ribbon-helix-helix (RHH) motifs present in regulatory DNA-binding proteins such as CopG. In order to understand the DNA-compaction mechanism of MatP at an atomic level, it was decided to study the structure of apo MatP and of the nucleoprotein complex MatP-matS by both X-ray diffraction and SAXS analysis. It was demonstrated that MatP forms dimers that bind a single matS motif. Complete native X-ray data sets were collected and phasing of the diffraction data is under way.
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105
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Nono M, Durand D, Nicolai T. Rheology and structure of mixtures of ι-carrageenan and sodium caseinate. Food Hydrocoll 2012. [DOI: 10.1016/j.foodhyd.2011.07.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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106
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Koubeissi M, Durand D, Kahriman E, Syed T, Miller J, Luders H. Low Frequency Electrical Stimulation of White Matter Tracts in Intractable Mesial Temporal Lobe Epilepsy (S46.007). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.s46.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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107
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Koubeissi M, Durand D, Kahriman E, Syed T, Miller J, Luders H. Low Frequency Electrical Stimulation of White Matter Tracts in Intractable Mesial Temporal Lobe Epilepsy (IN5-1.010). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.in5-1.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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108
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Balakrishnan G, Nicolai T, Benyahia L, Durand D. Particles trapped at the droplet interface in water-in-water emulsions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:5921-6. [PMID: 22394211 DOI: 10.1021/la204825f] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Water-in-water emulsions were formed by mixing incompatible aqueous solutions of dextran and poly(ethylene oxide) (PEO) in the presence of latex or protein particles. It was found that particles with a radius as small as 0.1 μm become trapped at the interface between the PEO- and dextran-rich phases with interfacial tensions down to 10(-6) N/m. The particles were visualized at the interface of the emulsion droplets using confocal laser scanning microscopy (CLSM) allowing determination of the contact angle. Various degrees of coverage with particles could be observed. On densely covered droplets, the particles had a hexagonal crystalline order. At intermediate coverage, transient clustering of the particles was observed. The diffusion coefficient of the particles at the interface was determined using multiparticle tracking. Fusion of droplets was observed in all cases leading eventually to macroscopic phase separation.
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109
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Contreras CA, Ochoa TJ, Ruiz J, Lacher DW, Durand D, DebRoy C, Lanata CF, Cleary TG. Genetic diversity of locus of enterocyte effacement genes of enteropathogenic Escherichia coli isolated from Peruvian children. J Med Microbiol 2012; 61:1114-1120. [PMID: 22493278 DOI: 10.1099/jmm.0.045443-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The aim of this study was to determine the frequency and allele associations of locus of enterocyte effacement encoded esp and tir genes among 181 enteropathogenic Escherichia coli (EPEC) strains (90 diarrhoea-associated and 91 controls) isolated from Peruvian children under 18 months of age. We analysed espA, espB, espD and tir alleles by PCR-RFLP. EPEC strains were isolated with higher frequency from healthy controls (91/424, 21.7%) than from diarrhoeal samples (90/936, 9.6%) (P<0.001); 28.9% of diarrhoeal and 17.6% of control samples were typical EPEC (tEPEC). The distribution of espA alleles (alpha, beta, beta2 and gamma) and espD alleles (alpha, beta, gamma and a new variant, espD-N1) between tEPEC and atypical EPEC (aEPEC) was significantly different (P<0.05). espD-alpha was more common among acute episodes (P<0.05). espB typing resulted in five alleles (alpha, beta, gamma and two new sub-alleles, espB-alpha2 and espB-alpha3), while tir-beta and tir-gamma2 were the most common intimin receptor subtypes. Seventy-two combinations of espA, espB, espD and tir alleles were found; the most prevalent combination was espA-beta, espB-beta, espD-beta, tir-beta (34/181 strains), which was more frequent among tEPEC strains (P<0.05). Our findings indicate that there is a high degree of heterogeneity among EPEC strains isolated from Peruvian children and that aEPEC and tEPEC variants cluster.
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Legouée E, Vient E, Durand D. Characterization of quasi-projectiles produced in symmetric collisions studied with INDRA. Comparison with models. EPJ WEB OF CONFERENCES 2012. [DOI: 10.1051/epjconf/20123100007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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111
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Thomar P, Durand D, Benyahia L, Nicolai T. Slow dynamics and structure in jammed milk protein suspensions. Faraday Discuss 2012; 158:325-39; discussion 351-70. [DOI: 10.1039/c2fd20014g] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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112
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Rivière A, Piriou V, Durand D, Arnoux A, Castot-Villepelet A. [Medication errors in anaesthesia: a review of reports from the French Health Products Agency]. ANNALES FRANCAISES D'ANESTHESIE ET DE REANIMATION 2012; 31:6-14. [PMID: 22197344 DOI: 10.1016/j.annfar.2011.11.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2011] [Accepted: 10/25/2011] [Indexed: 10/14/2022]
Abstract
BACKGROUND The purpose of this study was to assess medication errors and risks of medication errors during anaesthetic practice reported at the French Health Products Agency (Afssaps) from 2005 to 2010. STUDY DESIGN Descriptive study. METHODS The data are issued of "Medication errors and risks of medication errors" file which group together all cases received by the Medication Errors Unit at Afssaps since 2005. RESULTS A total of 263 cases were observed by the Medication Errors Unit at Afssaps. Among them, 159 cases were risks of medication errors, 76 cases were patent medication errors and 28 were near misses. Among the 76 cases of patent medication errors, out of which 47 cases were appreciated with adverse reaction and 35 cases were classified as serious. Adverse events were classified as haemodynamic, respiratory and neurologic events. Most of the errors occurred during administration (65%), followed by dispensing errors (14%), storage errors (15%) or preparation errors (4%). Sixty-nine percent of cases of wrong drug errors were found, followed by 26% of errors of strength, 3% of incorrect route of administration errors and 2% of patient errors. In most of cases, similarity in packaging was underlined (n=83). CONCLUSION This study showed that the majority of medication errors and risks of medication errors during anaesthetic practice, underline similarity in packaging. Results highlighted the importance of vial labeling presentation (readability and mention understanding) in anaesthetic practice.
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113
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Phan-Xuan T, Durand D, Nicolai T, Donato L, Schmitt C, Bovetto L. On the crucial importance of the pH for the formation and self-stabilization of protein microgels and strands. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:15092-15101. [PMID: 22054054 DOI: 10.1021/la203357p] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Stable suspensions of protein microgels are formed by heating salt-free β-lactoglobulin solutions at concentrations up to about C = 50 g·L(-1) if the pH is set within a narrow range between 5.75 and 6.1. The internal protein concentration of these spherical particles is about 150 g·L(-1) and the average hydrodynamic radius decreases with increasing pH from 200 to 75 nm. The formation of the microgels leads to an increase of the pH, which is a necessary condition to obtain stable suspensions. The spontaneous increase of the pH during microgel formation leads to an increase of their surface charge density and inhibits secondary aggregation. This self-stabilization mechanism is not sufficient if the initial pH is below 5.75 in which case secondary aggregation leads to precipitation. Microgels are no longer formed above a critical initial pH, but instead short, curved protein strands are obtained with a hydrodynamic radius of about 15-20 nm.
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Manet S, Schmitt J, Impéror-Clerc M, Zholobenko V, Durand D, Oliveira CLP, Pedersen JS, Gervais C, Baccile N, Babonneau F, Grillo I, Meneau F, Rochas C. Kinetics of the Formation of 2D-Hexagonal Silica Nanostructured Materials by Nonionic Block Copolymer Templating in Solution. J Phys Chem B 2011; 115:11330-44. [DOI: 10.1021/jp200213k] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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115
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Manet S, Lecchi A, Impéror-Clerc M, Zholobenko V, Durand D, Oliveira CLP, Pedersen JS, Grillo I, Meneau F, Rochas C. Structure of Micelles of a Nonionic Block Copolymer Determined by SANS and SAXS. J Phys Chem B 2011; 115:11318-29. [DOI: 10.1021/jp200212g] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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116
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Boudes M, Durand D, Graille M, Doizy A, Van Tilbeurgh H, Quevillon-Cheruel S. Structural and functional study of ComE, a key actor of S. pneumoniaecompetence. Acta Crystallogr A 2011. [DOI: 10.1107/s010876731108247x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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117
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Arnold R, Augier C, Baker J, Barabash AS, Basharina-Freshville A, Blondel S, Bongrand M, Broudin-Bay G, Brudanin V, Caffrey AJ, Chapon A, Chauveau E, Durand D, Egorov V, Flack R, Garrido X, Grozier J, Guillon B, Hubert P, Hugon C, Jackson CM, Jullian S, Kauer M, Klimenko A, Kochetov O, Konovalov SI, Kovalenko V, Lalanne D, Lamhamdi T, Lang K, Liptak Z, Lutter G, Mamedov F, Marquet C, Martin-Albo J, Mauger F, Mott J, Nachab A, Nemchenok I, Nguyen CH, Nova F, Novella P, Ohsumi H, Pahlka RB, Perrot F, Piquemal F, Reyss JL, Richards B, Ricol JS, Saakyan R, Sarazin X, Simard L, Simkovic F, Shitov Y, Smolnikov A, Söldner-Rembold S, Stekl I, Suhonen J, Sutton CS, Szklarz G, Thomas J, Timkin V, Torre S, Tretyak VI, Umatov V, Vála L, Vanyushin I, Vasiliev V, Vorobel V, Vylov T, Zukauskas A. Measurement of the ββ decay half-life of 130Te with the NEMO-3 detector. PHYSICAL REVIEW LETTERS 2011; 107:062504. [PMID: 21902318 DOI: 10.1103/physrevlett.107.062504] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2011] [Indexed: 05/31/2023]
Abstract
We report results from the NEMO-3 experiment based on an exposure of 1275 days with 661 g of (130)Te in the form of enriched and natural tellurium foils. The ββ decay rate of (130)Te is found to be greater than zero with a significance of 7.7 standard deviations and the half-life is measured to be T(½)(2ν) = [7.0 ± 0.9(stat) ± 1.1(syst)] × 10(20) yr. This represents the most precise measurement of this half-life yet published and the first real-time observation of this decay.
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Koubeissi MZ, Rashid S, Casadesus G, Xu K, Syed TU, Lüders H, Durand D. Transection of CA3 does not affect memory performance in rats. Epilepsy Behav 2011; 21:267-70. [PMID: 21576037 PMCID: PMC3125457 DOI: 10.1016/j.yebeh.2011.04.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2011] [Revised: 04/04/2011] [Accepted: 04/06/2011] [Indexed: 11/19/2022]
Abstract
Longitudinal hippocampal pathways are needed for seizure synchronization, and there is evidence that their transection may abolish seizures. However, the effect of such transection on memory is unknown. In this study, we investigated the effect of transverse CA3 transections on memory function in Sprague-Dawley rats. With a stereotactic knife, a single CA3 transection was made unilaterally (n=5) or bilaterally (n=5). Sham surgery was done in another group (n=4). Morris water maze and novel object recognition tests were started 18 days later and revealed no significant differences between transected animals and controls. Cresyl-violet brain staining confirmed the locations of transections in the CA3 region. We conclude that normal performances in Morris water maze and novel object recognition tests do not appear to require intact transmission throughout the whole length of CA3, supporting the hypothesis that CA3 transections may be used in temporal lobe epilepsy to interrupt seizure circuitry while preserving memory.
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119
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Miron S, Durand D, Chilom C, Pérez J, Craescu CT. Binding of calcium, magnesium, and target peptides to Cdc31, the centrin of yeast Saccharomyces cerevisiae. Biochemistry 2011; 50:6409-22. [PMID: 21714500 DOI: 10.1021/bi200518d] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Cdc31, the Saccharomyces cerevisiae centrin, is an EF-hand calcium-binding protein essential for the cell division and mRNA nuclear export. We used biophysical techniques to investigate its calcium, magnesium, and protein target binding properties as well as their conformations in solution. We show here that Cdc31 displays one Ca(2+)/Mg(2+) mixed site in the N-terminal domain and two low-affinity Ca(2+) sites in the C-terminal domain. The affinity of Cdc31 for different natural target peptides (from Kar1, Sfi1, Sac3) that we obtained by isothermal titration calorimetry shows weakly Ca(2+), but also Mg(2+) dependence. The characteristics of target surface binding were shown to be similar; we highlight that the 1-4 hydrophobic amino acid motif, in a stable amphipathic α-helix, is critical for binding. Ca(2+) and Mg(2+) binding increase the α-helix content and stabilize the structure. Analysis of small-angle X-ray scattering experiments revealed that N- and C-terminal domains are not individualized in apo-Cdc31; in contrast, they are separated in the Mg(2+) state, creating a groove in the middle of the molecule that is occupied by the target peptide in the liganded form. Consequently, Mg(2+) seems to have consequences on Cdc31's function and could be important to stimulate interactions in resting cells.
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120
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Nono M, Nicolai T, Durand D. Gel formation of mixtures of κ-carrageenan and sodium caseinate. Food Hydrocoll 2011. [DOI: 10.1016/j.foodhyd.2010.07.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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121
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Nono M, Lalouette L, Durand D, Nicolai T. Cluster formation and phase separation in mixtures of sodium κ-carrageenan and sodium caseinate. Food Hydrocoll 2011. [DOI: 10.1016/j.foodhyd.2010.08.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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122
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Collinet B, Friberg A, Brooks MA, van den Elzen T, Henriot V, Dziembowski A, Graille M, Durand D, Leulliot N, Saint André C, Lazar N, Sattler M, Séraphin B, van Tilbeurgh H. Strategies for the structural analysis of multi-protein complexes: lessons from the 3D-Repertoire project. J Struct Biol 2011; 175:147-58. [PMID: 21463689 DOI: 10.1016/j.jsb.2011.03.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2011] [Revised: 03/18/2011] [Accepted: 03/19/2011] [Indexed: 11/25/2022]
Abstract
Structural studies of multi-protein complexes, whether by X-ray diffraction, scattering, NMR spectroscopy or electron microscopy, require stringent quality control of the component samples. The inability to produce 'keystone' subunits in a soluble and correctly folded form is a serious impediment to the reconstitution of the complexes. Co-expression of the components offers a valuable alternative to the expression of single proteins as a route to obtain sufficient amounts of the sample of interest. Even in cases where milligram-scale quantities of purified complex of interest become available, there is still no guarantee that good quality crystals can be obtained. At this step, protein engineering of one or more components of the complex is frequently required to improve solubility, yield or the ability to crystallize the sample. Subsequent characterization of these constructs may be performed by solution techniques such as Small Angle X-ray Scattering and Nuclear Magnetic Resonance to identify 'well behaved' complexes. Herein, we recount our experiences gained at protein production and complex assembly during the European 3D Repertoire project (3DR). The goal of this consortium was to obtain structural information on multi-protein complexes from yeast by combining crystallography, electron microscopy, NMR and in silico modeling methods. We present here representative set case studies of complexes that were produced and analyzed within the 3DR project. Our experience provides useful insight into strategies that are more generally applicable for structural analysis of protein complexes.
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Díaz E, Vázquez N, Fernández C, Durand D, Lasaga M, Debeljuk L, Díaz B. Seasonal variations of Substance P in the striatum of the female rat are affected by maternal and offspring pinealectomy. Neurosci Lett 2011; 492:71-5. [DOI: 10.1016/j.neulet.2011.01.053] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2010] [Revised: 01/11/2011] [Accepted: 01/21/2011] [Indexed: 11/16/2022]
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124
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Lairez D, Durand D, Emery JR. Gelation and vitrification of epoxy resins monitored by ultrasonic measurements. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/masy.19910450107] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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125
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Filaire E, Massart A, Rouveix M, Portier H, Rosado F, Durand D. Effects of 6 weeks of n-3 fatty acids and antioxidant mixture on lipid peroxidation at rest and postexercise. Eur J Appl Physiol 2011; 111:1829-39. [PMID: 21222131 DOI: 10.1007/s00421-010-1807-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2010] [Accepted: 12/23/2010] [Indexed: 01/20/2023]
Abstract
The purpose of this randomized study was to measure the influence of 6 weeks of LCPUFA (600 mg EPA and 400 mg DHA per day) supplementation alone or in association with 30 mg vitamin E, 60 mg vitamin C and 6 mg β-carotene on resting and exercise-induced lipid peroxidation in judoists (n = 36). Blood samples were collected at rest before (T (1)) and after the supplementation period, in preexercise (T (2)) and postexercise (T (3)) conditions, for analysis of α-tocopherol, retinol, lag phase (Lp) before free radical-induced oxidation, maximum rate of oxidation (R (max)) during the propagating chain reaction, maximum amount of conjugated dienes (CD(max)) accumulated after the propagation phase, and nitric oxide, malondialdehyde and lipoperoxide (POOL) concentrations. Dietary data were collected using a 7-day diet record. There were no significant differences among treatment groups with respect to habitual intakes of energy from fat, carbohydrate, or protein. At T (1), there were no significant differences among treatment groups with respect to lipid peroxidation, lag phase, and levels of α-tocopherol or retinol. The consumption of an n-3 LC PUFA supplement increased oxidative stress at rest and did not attenuate the exercise-induced oxidative stress. The addition of antioxidants did not prevent the formation of oxidation products at rest. On the contrary, it seems that the combination of antioxidants added to the n-3 LCPUFA supplement led to a decrease in, CD(max), R (max), and POOL and MDA concentrations after a judo training session.
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Balakrishnan G, Durand D, Nicolai T. Particle Diffusion in Globular Protein Gels in Relation to the Gel Structure. Biomacromolecules 2010; 12:450-6. [DOI: 10.1021/bm101238r] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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127
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Filgueras R, Gatellier P, Aubry L, Thomas A, Bauchart D, Durand D, Zambiazi R, Santé-Lhoutellier V. Colour, lipid and protein stability of Rhea americana meat during air- and vacuum-packaged storage: Influence of muscle on oxidative processes. Meat Sci 2010; 86:665-73. [DOI: 10.1016/j.meatsci.2010.06.003] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2009] [Revised: 05/27/2010] [Accepted: 06/07/2010] [Indexed: 11/28/2022]
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128
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Urvoas A, Guellouz A, Valerio-Lepiniec M, Graille M, Durand D, Desravines DC, van Tilbeurgh H, Desmadril M, Minard P. Design, Production and Molecular Structure of a New Family of Artificial Alpha-helicoidal Repeat Proteins (αRep) Based on Thermostable HEAT-like Repeats. J Mol Biol 2010; 404:307-27. [DOI: 10.1016/j.jmb.2010.09.048] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2010] [Revised: 09/15/2010] [Accepted: 09/21/2010] [Indexed: 01/07/2023]
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129
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Boze H, Marlin T, Durand D, Pérez J, Vernhet A, Canon F, Sarni-Manchado P, Cheynier V, Cabane B. Proline-rich salivary proteins have extended conformations. Biophys J 2010; 99:656-65. [PMID: 20643086 DOI: 10.1016/j.bpj.2010.04.050] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2010] [Revised: 04/17/2010] [Accepted: 04/21/2010] [Indexed: 10/19/2022] Open
Abstract
Three basic proline-rich salivary proteins have been produced through the recombinant route. IB5 is a small basic proline-rich protein that is involved in the binding of plant tannins in the oral cavity. II-1 is a larger protein with a closely related backbone; it is glycosylated, and it is also able to bind plant tannins. II-1 ng has the same polypeptidic backbone as II-1, but it is not glycosylated. Small angle x-ray scattering experiments on dilute solutions of these proteins confirm that they are intrinsically disordered. IB5 and II-1 ng can be described through a chain model including a persistence length and cross section. The measured radii of gyration (Rg=27.9 and 41.0+/-1 A respectively) and largest distances (rmax=110 and 155+/-10 A respectively) show that their average conformations are rather extended. The length of the statistical segment (twice the persistence length) is b=30 A, which is larger than the usual value (18 A-20 A) for unstructured polypeptide chains. These characteristics are presumably related to the presence of polyproline helices within the polypeptidic backbones. For both proteins, the radius of gyration of the chain cross-section is Rc=2.7+/-0.2A. The glycosylated protein II-1 has similar conformations but the presence of large polyoside sidegroups yields the structure of a branched macromolecule with the same hydrophobic backbone and hydrophilic branches. It is proposed that the unusually extended conformations of these proteins in solution facilitate the capture of plant tannins in the oral cavity.
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130
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Mingat N, Kamar N, Guillotreau J, Ribes D, Sallusto F, Cointault O, Malavaud B, Rostaing L, Rischmann P, Durand D, Gamé X. Épidémiologie des patients neurologiques dans une population de transplantés rénaux. Prog Urol 2010; 20:503-7. [DOI: 10.1016/j.purol.2010.01.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2009] [Revised: 01/12/2010] [Accepted: 01/18/2010] [Indexed: 11/28/2022]
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131
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Lehaut G, Durand D, Lopez O, Vient E, Chbihi A, Frankland JD, Bonnet E, Borderie B, Bougault R, Galichet E, Guinet D, Lautesse P, Le Neindre N, Napolitani P, Parlog M, Rivet MF, Rosato E. Study of nuclear stopping in central collisions at intermediate energies. PHYSICAL REVIEW LETTERS 2010; 104:232701. [PMID: 20867230 DOI: 10.1103/physrevlett.104.232701] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2010] [Indexed: 05/29/2023]
Abstract
Nuclear stopping has been investigated in central nuclear collisions at intermediate energies by analyzing kinematically complete events recorded with the help of the 4π multidetector INDRA for a large variety of symmetric systems. It is found that the mean isotropy ratio defined as the ratio of transverse to parallel momenta (energies) reaches a minimum near the Fermi energy, saturates or slowly increases depending on the mass of the system as the beam energy increases, and then stays lower than unity, showing that significant stopping is not achieved even for the heavier systems. Close to and above the Fermi energy, experimental data show no effect of the isospin content of the interacting system. A comparison with transport model calculations reveals that the latter overestimates the stopping power at low energies.
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132
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Santé-Lhoutellier V, Gatellier P, Fiot I, Durand D, Micol D, Picard B. Specific features of muscles and meat from ‘AOC’ guaranteed-origin Taureau de Camargue beef cattle. Livest Sci 2010. [DOI: 10.1016/j.livsci.2009.12.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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133
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Ako K, Nicolai T, Durand D. Salt-Induced Gelation of Globular Protein Aggregates: Structure and Kinetics. Biomacromolecules 2010; 11:864-71. [DOI: 10.1021/bm9011437] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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134
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Kamar N, Milioto O, Puissant-Lubrano B, Esposito L, Pierre MC, Mohamed AO, Lavayssière L, Cointault O, Ribes D, Cardeau I, Nogier MB, Durand D, Abbal M, Blancher A, Rostaing L. Incidence and predictive factors for infectious disease after rituximab therapy in kidney-transplant patients. Am J Transplant 2010; 10:89-98. [PMID: 19656128 DOI: 10.1111/j.1600-6143.2009.02785.x] [Citation(s) in RCA: 153] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Rituximab off-label use includes organ transplantation. We review the occurrence of infectious disease and its outcome after rituximab therapy. Between April 2004 and August 2008, 77 kidney-transplant patients received rituximab therapy [2-8 courses (median 4) of 375 mg/m2 each] for various reasons. Their results were compared with a control group (n=902) who had received no rituximab. After a median follow-up of 16.5 (1-55) months for rituximab patients and 60.9 (1.25-142.7) months for control patients, the incidence of infectious disease was 45.45% and 53.9% (ns), respectively. The incidence of bacterial infection was similar between the two groups, whereas the viral-infection rate was significantly lower, and the rate of fungal infection was significantly higher in the rituximab group. Nine out of 77 patients (11.68%) died after rituximab therapy, of which seven deaths (9.09%) were related to an infectious disease, compared to 1.55% in the controls (p=0.0007). In the whole population, the independent predictive factors for infection-induced death were the combined use of rituximab and antithymocyte-globulin given for induction or anti-rejection therapy, recipient age, and bacterial and fungal infections. After kidney transplantation, the use of rituximab is associated with a high risk of infectious disease and death related to infectious disease.
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135
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Durand P, Fornasieri G, Baumier C, Beaunier P, Durand D, Rivière E, Bleuzen A. Control of stoichiometry, size and morphology of inorganic polymers by template assisted coordination chemistry. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/c0jm01552k] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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136
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Gobert M, Martin B, Ferlay A, Chilliard Y, Graulet B, Pradel P, Bauchart D, Durand D. Plant polyphenols associated with vitamin E can reduce plasma lipoperoxidation in dairy cows given n-3 polyunsaturated fatty acids. J Dairy Sci 2009; 92:6095-104. [DOI: 10.3168/jds.2009-2087] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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137
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Rabischong B, Rabischong P, Fraisse G, Gallego S, Durand D, Gaydier P, Favre N, Botchorishvili R, Canis M, Mage G, Avan P. Laparoscopic Implantation of Neural Electrodes on Pelvic Nerves: An Experimental Study in a Chronic Minipig Model. J Minim Invasive Gynecol 2009. [DOI: 10.1016/j.jmig.2009.08.052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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138
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Durand D, Vivès C, Cannella D, Pérez J, Pebay-Peyroula E, Vachette P, Fieschi F. NADPH oxidase activator p67(phox) behaves in solution as a multidomain protein with semi-flexible linkers. J Struct Biol 2009; 169:45-53. [PMID: 19723583 DOI: 10.1016/j.jsb.2009.08.009] [Citation(s) in RCA: 222] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2009] [Revised: 08/07/2009] [Accepted: 08/27/2009] [Indexed: 11/16/2022]
Abstract
The NADPH oxidase complex is involved in the destruction of phagocytosed pathogens through the production of reactive oxygen species. This activatable complex consists of a membranous heterodimeric flavocytochrome b, a small G-protein Rac1/Rac2 and cytosolic factors, p47(phox), p67(phox) and p40(phox). p67(phox), due to its modular structure, is the NADPH oxidase component for which global structure information is most scarce despite its mandatory role in activation and its central position in the whole complex organization. Indeed, p67(phox) is the only factor establishing interaction with all others. In this study, we report the SAXS analysis of p67(phox). Our data reveals that p67(phox) behaves as a multidomain protein with semi-flexible linkers. On the one hand, it appears to be a very elongated molecule with its various domains organized as beads on a string. Linkers are predicted to be partially or mainly unstructured and features of our experimental data do point towards inter-domain flexibility. On the other hand, our work also suggests that the protein is not as extended as unstructured linkers could allow, thereby implying the existence of intra-molecular interactions within p67(phox). We suggest that the dual character of p67(phox) conformation in solution is central to ensure the numerous interactions to be accommodated.
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139
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Sallusto F, Kamar N, Khedis M, Gamé X, Taj K, Delisle MB, Fort M, Noury D, Durand D, Rostaing L, Rischmann P. [Domino transplantation of a living-donor kidney graft affected by thrombotic microangiopathy: surgical aspects]. Prog Urol 2009; 19:513-6. [PMID: 19559386 DOI: 10.1016/j.purol.2009.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2008] [Revised: 01/30/2009] [Accepted: 02/04/2009] [Indexed: 11/25/2022]
Abstract
We report surgical aspects of the first case of retransplantation of a kidney initially retrieved from a cadaveric donor, then on a first recipient which developed a recurrent severe and intractable thrombotic microangiopathy on the allograft.
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140
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Tabarani G, Thépaut M, Stroebel D, Ebel C, Vivès C, Vachette P, Durand D, Fieschi F. DC-SIGN neck domain is a pH-sensor controlling oligomerization: SAXS and hydrodynamic studies of extracellular domain. J Biol Chem 2009; 284:21229-40. [PMID: 19502234 DOI: 10.1074/jbc.m109.021204] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
DC-SIGN is a C-type lectin receptor of dendritic cells and is involved in the early stages of numerous infectious diseases. DC-SIGN is organized into a tetramer enabling multivalent interaction with pathogens. Once formed, the DC-SIGN-pathogen complex can be internalized into compartments of increasing acidity. We have studied the pH dependence of the oligomerization state and conformation of the entire extracellular domain and neck region. We present evidence for equilibrium between the monomeric and tetrameric states of the extracellular domain, which exhibits a marked dependence with respect to both pH and ionic strength. Using solution x-ray scattering we have obtained a molecular envelope of the extracellular domain in which a model has been built. Our results highlight the central role of the neck domain in the pH-sensitive control of the oligomerization state, in the extended conformation of the protein, and in carbohydrate recognition domain organization and presentation. This work opens new insight into the molecular mechanism of ligand release and points to new avenues to block the first step of this important infection pathway.
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141
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Pitkowski A, Nicolai T, Durand D. Stability of caseinate solutions in the presence of calcium. Food Hydrocoll 2009. [DOI: 10.1016/j.foodhyd.2008.07.016] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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142
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Blanc M, Durand D, Leclercq P. H-25 Insuffisance cortico-surrénalienne induite par l’association ritonavir et corticoïdes inhalés. Med Mal Infect 2009. [DOI: 10.1016/s0399-077x(09)74398-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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143
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Ako K, Durand D, Nicolai T, Becu L. Quantitative analysis of confocal laser scanning microscopy images of heat-set globular protein gels. Food Hydrocoll 2009. [DOI: 10.1016/j.foodhyd.2008.09.003] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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144
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Guyomarc'h F, Nono M, Nicolai T, Durand D. Heat-induced aggregation of whey proteins in the presence of κ-casein or sodium caseinate. Food Hydrocoll 2009. [DOI: 10.1016/j.foodhyd.2008.07.001] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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145
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Noël C, Abramowicz D, Durand D, Mourad G, Lang P, Kessler M, Charpentier B, Touchard G, Berthoux F, Merville P, Ouali N, Squifflet JP, Bayle F, Wissing KM, Hazzan M. Daclizumab versus antithymocyte globulin in high-immunological-risk renal transplant recipients. J Am Soc Nephrol 2009; 20:1385-92. [PMID: 19470677 DOI: 10.1681/asn.2008101037] [Citation(s) in RCA: 149] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Nondepleting anti-CD25 monoclonal antibodies (daclizumab) and depleting polyclonal antithymocyte globulin (Thymoglobulin) both prevent acute rejection, but these therapies have not been directly compared in a high-risk, HLA-sensitized renal transplant population. We randomly assigned 227 patients, who were about to receive a kidney graft from a deceased donor, to either Thymoglobulin or daclizumab if they met one of the following risk factors: current panel reactive antibodies (PRA) >30%; peak PRA >50%; loss of a first kidney graft from rejection within 2 yr of transplantation; or two or three previous grafts. Maintenance immunosuppression comprised tacrolimus, mycophenolate mofetil, and steroids. Compared with the daclizumab group, patients treated with Thymoglobulin had a lower incidence of both biopsy-proven acute rejection (15.0% versus 27.2%; P = 0.016) and steroid-resistant rejection (2.7% versus 14.9%; P = 0.002) at one year. One-year graft and patient survival rates were similar between the two groups. In a comparison of rejectors and nonrejectors, overall graft survival was significantly higher in the rejection-free group (87.2% versus 75.0%; P = 0.037). In conclusion, among high-immunological-risk renal transplant recipients, Thymoglobulin is superior to daclizumab for the prevention of biopsy-proven acute rejection, but there is no significant benefit to one-year graft or patient survival.
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146
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Böhler T, Canivet C, Nguyen PNL, Galvani S, Thomsen M, Durand D, Salvayre R, Negre-Salvayre A, Rostaing L, Kamar N. Cytokines correlate with age in healthy volunteers, dialysis patients and kidney-transplant patients. Cytokine 2009; 45:169-73. [DOI: 10.1016/j.cyto.2008.11.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2008] [Revised: 10/05/2008] [Accepted: 11/29/2008] [Indexed: 11/27/2022]
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147
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Leulliot N, Cladière L, Lecointe F, Durand D, Hübscher U, van Tilbeurgh H. The family X DNA polymerase from Deinococcus radiodurans adopts a non-standard extended conformation. J Biol Chem 2009; 284:11992-9. [PMID: 19251692 DOI: 10.1074/jbc.m809342200] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Deinococcus radiodurans is an extraordinarily radioresistant bacterium that is able to repair hundreds of radiation-induced double-stranded DNA breaks. One of the players in this pathway is an X family DNA polymerase (PolX(Dr)). Deletion of PolX(Dr) has been shown to decrease the rate of repair of double-stranded DNA breaks and increase cell sensitivity to gamma-rays. A 3'-->5' exonuclease activity that stops cutting close to DNA loops has also been demonstrated. The present crystal structure of PolX(Dr) solved at 2.46-A resolution reveals that PolX(Dr) has a novel extended conformation in stark contrast to the closed "right hand" conformation commonly observed for DNA polymerases. This extended conformation is stabilized by the C-terminal PHP domain, whose putative nuclease active site is obstructed by its interaction with the polymerase domain. The overall conformation and the presence of non standard residues in the active site of the polymerase X domain makes PolX(Dr) the founding member of a novel class of polymerases involved in DNA repair but whose detailed mode of action still remains enigmatic.
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148
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Nogier MB, Lavayssiere L, Cointault O, Abbal M, Kamar N, Periquet B, Rostaing L, Durand D. Blood epuration of middle molecules in continuous venovenous hemodiafiltration with regional citrate anticoagulation versus systemic heparinization. Crit Care 2009. [PMCID: PMC4084156 DOI: 10.1186/cc7434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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149
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Le Rouzo G, Lamouroux C, Dauvois V, Dannoux A, Legand S, Durand D, Moisy P, Moutiers G. Anion effect on radiochemical stability of room-temperature ionic liquids under gamma irradiation. Dalton Trans 2009:6175-84. [DOI: 10.1039/b903005k] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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150
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Fléchard X, Liénard E, Méry A, Rodríguez D, Ban G, Durand D, Duval F, Herbane M, Labalme M, Mauger F, Naviliat-Cuncic O, Thomas JC, Velten P. Paul trapping of radioactive 6He+ ions and direct observation of their beta decay. PHYSICAL REVIEW LETTERS 2008; 101:212504. [PMID: 19113407 DOI: 10.1103/physrevlett.101.212504] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2008] [Indexed: 05/27/2023]
Abstract
We demonstrate that abundant quantities of short-lived beta unstable ions can be trapped in a novel transparent Paul trap and that their decay products can directly be detected in coincidence. Low energy 6He+ (807 ms half-life) ions were extracted from the SPIRAL source at GANIL, then decelerated, cooled, and bunched by means of the buffer gas cooling technique. More than 10(8) ions have been stored over a measuring period of six days, and about 10(5) decay coincidences between the beta particles and the 6Li++ recoiling ions have been recorded. The technique can be extended to other short-lived species, opening new possibilities for trap assisted decay experiments.
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