32 research outputs found

    Genome-wide association study identifies six new loci influencing pulse pressure and mean arterial pressure.

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    Numerous genetic loci have been associated with systolic blood pressure (SBP) and diastolic blood pressure (DBP) in Europeans. We now report genome-wide association studies of pulse pressure (PP) and mean arterial pressure (MAP). In discovery (N = 74,064) and follow-up studies (N = 48,607), we identified at genome-wide significance (P = 2.7 × 10(-8) to P = 2.3 × 10(-13)) four new PP loci (at 4q12 near CHIC2, 7q22.3 near PIK3CG, 8q24.12 in NOV and 11q24.3 near ADAMTS8), two new MAP loci (3p21.31 in MAP4 and 10q25.3 near ADRB1) and one locus associated with both of these traits (2q24.3 near FIGN) that has also recently been associated with SBP in east Asians. For three of the new PP loci, the estimated effect for SBP was opposite of that for DBP, in contrast to the majority of common SBP- and DBP-associated variants, which show concordant effects on both traits. These findings suggest new genetic pathways underlying blood pressure variation, some of which may differentially influence SBP and DBP

    Complications postopératoires des tumeurs cérébrales de l enfant (expérience du service de réanimation polyvalente de l enfant du CHU d Angers)

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    Introduction: La neurochirurgie constitue l Ă©lĂ©ment essentiel de la prise en charge des tumeurs cĂ©rĂ©brales de l enfant avant un Ă©ventuel traitement complĂ©mentaire (chimio et/ou radiothĂ©rapie). En pĂ©riode postopĂ©ratoire, les patients requiĂšrent une surveillance Ă©troite dans un service de rĂ©animation afin de dĂ©tecter et de prendre en charge rapidement les Ă©ventuelles complications liĂ©es Ă  l acte opĂ©ratoire. Le but de cette Ă©tude Ă©tait de recenser l incidence et les caractĂ©ristiques de ces complications ainsi que l Ă©volution neurologique des enfants en pĂ©riode postopĂ©ratoire.Patients et mĂ©thodes: Notre Ă©tude rĂ©trospective portait sur les patients hospitalisĂ©s entre le 1er janvier 2002 et le 31 dĂ©cembre 2008 dans l unitĂ© de RĂ©animation Polyvalente de l Enfant du CHU d Angers aprĂšs exĂ©rĂšse d une tumeur cĂ©rĂ©brale. Les dĂ©tails de la population, les donnĂ©es opĂ©ratoires et post chirurgicales ont Ă©tĂ© recensĂ©es.RĂ©sultats: Nous rapportons 117 interventions. Les complications mĂ©taboliques (30%) ainsi que les hĂ©morragies (6%) survenaient prĂ©cocement (avant 48 heures). Les complications infectieuses (20,5%) Ă©taient plus tardives. Une amĂ©lioration neurologique Ă©tait constatĂ©e dans les 2 premiers jours en particulier chez les enfants prĂ©sentant un syndrome cĂ©rĂ©belleux, des convulsions ou un dĂ©ficit endocrinien prĂ©existants. Un seul patient est dĂ©cĂ©dĂ© aprĂšs la chirurgie.Conclusion: Toutes ces complications et leurs facteurs de risque doivent ĂȘtre systĂ©matiquement recherchĂ©s afin de diminuer la morbiditĂ© post opĂ©ratoire des tumeurs cĂ©rĂ©brales de l enfant. Elles justifient d une Ă©quipe chirurgicale et d une Ă©quipe d anesthĂ©sie rĂ©animation particuliĂšrement habituĂ©es Ă  ce type de pathologie.ANGERS-BU MĂ©decine-Pharmacie (490072105) / SudocSudocFranceF

    Validation de la version française d'un indicateur de qualité de vie orale chez les plus de 65 ans (OIDP)

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    CLERMONT FD-BCIU-Santé (631132104) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF

    Don d'ovocytes en France et lois de bioéthique (limites, contradictions et interrogations )

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    Plus de 20 aprĂšs le premier don d'ovocytes, la demande persiste, plus que jamais, et les moyens se trouvent Ă  l'Ă©tranger. Les lois de 1994 et de 2004 offrent Ă  la France un cadre, rassurant certes, mais aussi restrictif, qui, en voulant trop protĂ©ger, a peut ĂȘtre conduit Ă  l'Ă©mergence de problĂšmes Ă©thiques sĂ©rieux. Et la pratique quotidienne se heurte Ă  la pĂ©nurie de donneuses, au tourisme procrĂ©atif, aux questions religieuses et aux inquiĂ©tudes sur ces nouvelles filiations. Quelles seraient alors les limites Ă  ne pas franchir et comment les Ă©tablir? Quelle lĂ©gitimitĂ© pour la gratuitĂ© et l'anonymat ? Tout en dĂ©veloppant la technique, il faut veiller Ă  modĂ©rer les indications. Et peut ĂȘtre ne jamais oublier que les droits de l'enfant priment devant le droit Ă  l'enfant.NANTES-BU MĂ©decine pharmacie (441092101) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF

    First constraints on the timing of the Ecuadorian Coastal Cordillera upliftand geodynamic implications

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    International audienceThe Carnegie Ridge subduction beneath the South American plate is currently considered as responsiblefor the acceleration of the northward escape of the North Andean Block, for the opening of the GuayaquilGulf, and for the uplift of the coastal forearc domain of western Ecuador, since at least Late Pleistocene. How-ever, the exact timing and amount of uplift of the coastal forearc domain and its Coastal Cordillera is poorly known.In this study, we provide the first detrital apatite (U-Th-Sm)/He (AHe) and zircon U/Pb ages from thecoastal domain in order to constrain the thermal history of both the Coastal Cordillera and its foreland basin.Our preliminary results indicate that the Middle-Late Miocene Angostura Fm was buried during Late Miocene,recording high enough temperatures to partially reset AHe ages. We show that the basin then records1 km ofuplift associated to erosion and cooling since Early Pliocene (5 Ma)

    La transition vers l’ñge adulte: une pĂ©riode charniĂšre dans la prise en charge continue des jeunes patients

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    International audienceIn recent decades, follow-up of cancer survivors has taken on its full meaning with the gradual improvement in the survival of children and adolescents with cancer. This follow-up is associated specially for adolescents with a multitude of transitions: the transition from therapeutic management to the monitoring for possible relapse, the transition into long-term follow-up after childhood cancer, the transition from a pediatric system to an adult care system. If this transition can be perceived as difficult by patients, it gives young people the opportunity to access more autonomous follow-up and support in becoming an adult. Supporting the transition should make caregivers attentive to this time of consolidation of adolescence, favorable to the emergence of a sense of stable, mature identity that guarantees a certain autonomy. This is a key to a successful transition limiting breakdown of care and promoting "the work of the disease". The double contribution of adult and pediatric oncology provides support tailored to these psychic and societal issues. AYA teams can actively participate in this process by facilitating the acculturation of pediatric and adult care teams to the specificity of this group, thus allowing a continuum of care.Au cours des derniĂšres dĂ©cennies, le suivi aprĂšs cancer a pris tout son sens avec l’amĂ©lioration progressive de la survie des enfants et adolescents atteints de cancer. Ce suivi s’associe en particulier pour les adolescents Ă  une multitude de transitions : la transition de la prise en charge thĂ©rapeutique Ă  celle de la surveillance de la rechute Ă©ventuelle, la transition dans le suivi Ă  long terme aprĂšs un cancer survenu dans l’enfance, la transition d’un systĂšme pĂ©diatrique Ă  celle d’un systĂšme de soins d’adultes. Si cette pĂ©riode de transition peut ĂȘtre perçue comme difficile par les patients, elle donne aux jeunes la possibilitĂ© d’accĂ©der Ă  un suivi plus autonome et un Ă©tayage au devenir adulte. Accompagner la transition devrait rendre les soignants attentifs Ă  ce temps de consolidation du travail d’adolescence favorable Ă  l’émergence d’un sentiment d’identitĂ© stable, mature et garant d’une certaine autonomie. Il s’agit d’une clĂ© pour une transition rĂ©ussie limitant les ruptures de soins et favorisant ainsi « le travail de la maladie ». La double contribution de la cancĂ©rologie adulte et pĂ©diatrique permet d’assurer un accompagnement adaptĂ© Ă  ces enjeux psychiques et sociĂ©taux. Les Ă©quipes AJA peuvent participer activement Ă  ce processus en facilitant l’acculturation des Ă©quipes de soins pĂ©diatriques et d’adultes Ă  la spĂ©cificitĂ© de cette tranche d’ñge, permettant ainsi un continuum de la prise en soin

    E. coli chromosomal-driven expression of NADK2 from A. thaliana: A preferable alternative to plasmid-driven expression for challenging proteins

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    International audienceL'expression et la purification de grandes protĂ©ines recombinantes ou complexes protĂ©iques est problĂ©matique pour certains laboratoires de biotechnologie. En effet, il est souvent difficile d'obtenir suffisamment de protĂ©ines actives pour effectuer une caractĂ©risation biologique ou atteindre la commercialisation, lorsque de grandes protĂ©ines ou complexes protĂ©iques sont exprimĂ©s via le systĂšme d'expression populaire basĂ© sur le plasmide T7 . E. coliIl existe Ă©galement une demande industrielle pour rĂ©duire notre dĂ©pendance Ă  l'expression basĂ©e sur les plasmides, en raison de ses inconvĂ©nients, tels que : i) l'utilisation courante d'antibiotiques pour maintenir le plasmide, ii) le problĂšme du nombre de copies de plasmide et iii)le risque de surcharger le systĂšme d'expression. MalgrĂ© tous ces problĂšmes, les solutions alternatives, telles que l'intĂ©gration de gĂšnes dans le chromosome bactĂ©rien , sont rarement employĂ©es et leurs avantages font encore dĂ©bat.Arabidopsis thalianaIci, nous montrons que l'expression axĂ©e sur les chromosomes a permis la rĂ©cupĂ©ration de la protĂ©ine NADK2 plus active que les systĂšmes d'expression T7 classiques, ainsi qu'une meilleure production, confirmant ainsi que l'expression Ă  partir d'une seule copie chromosomique est prĂ©fĂ©rable Ă  l'expression axĂ©e sur les plasmides et pourrait ĂȘtre attrayante pour les deux bases. et la recherche appliquĂ©e

    Association of Chromatin Proteins High Mobility Group Box (HMGB) 1 and HMGB2 with Mitotic Chromosomes

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    High mobility group box (HMGB) 1 and 2 are two abundant nonhistone nuclear proteins that have been found in association with chromatin. Previous studies based on immunofluorescence analysis indicated that HMGB1 dissociates from chromosomes during mitosis. In the present work, HMGB1 and 2 subcellular localization was reinvestigated in living cells by using enhanced green fluorescent protein- and Discosome sp. red fluorescent protein-tagged proteins. Contrary to previous reports, HMGB1 and 2 were shown to be present under two forms in mitotic cells, i.e., free and associated with the condensed chromatin, which rapidly exchange. A detailed analysis of HMGB2 interaction with mitotic chromosomes indicated that two sites encompassing HMG-box A and B are responsible for binding. Importantly, this interaction was rapidly inactivated when cells were permeabilized or exposed to chemical fixatives that are widely used in immunodetection techniques. A comparable behavior was also observed for two proteins of the HMG-nucleosome binding (HMGN) group, namely, HMGN1 and HMGN2

    Truncated PrP(c) in mammalian brain: interspecies variation and location in membrane rafts.

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    A key molecular event in prion diseases is the conversion of cellular prion protein (PrP(c)) into an abnormal misfolded conformer (PrP(sc)). The PrP(c) N-terminal domain plays a central role in PrP(c) functions and in prion propagation. Because mammalian PrP(c) is found as a full-length and N-terminally truncated form, we examined the presence and amount of PrP(c) C-terminal fragment in the brain of different species. We found important variations between primates and rodents. In addition, our data show that the PrP(c) fragment is present in detergent-resistant raft domains, a membrane domain of critical importance for PrP(c) functions and its conversion into PrP(sc)
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