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See detailMicrostructural and functional correlates of glutamate concentration in the posterior cingulate cortex.
Arrubla Martinez, Jorge Andres ULg; Farrher, Ezequiel; Strippelmann, Johanna et al

in Journal of Neuroscience Research (2017)

Glutamate is the major excitatory neurotransmitter in the human brain and has a central role in both intrinsic and stimulus-induced activity. We conducted a study in a cohort of healthy, male volunteers ... [more ▼]

Glutamate is the major excitatory neurotransmitter in the human brain and has a central role in both intrinsic and stimulus-induced activity. We conducted a study in a cohort of healthy, male volunteers in which glutamate levels were measured in the posterior cingulate cortex (PCC) using 1H magnetic resonance spectroscopy at 3T. The advantages of simultaneous electroencephalography and magnetic resonance imaging (EEG-MRI) were exploited and the subjects were measured in the same session and under the same physiological conditions. Diffusion tensor imaging (DTI), functional MRI (fMRI) and EEG were measured in order to investigate the functional and microstructural correlates of glutamate. The concentration of glutamate (institute units) was calculated and those values were tested for correlation with the metrics of resting state fMRI, DTI, and EEG electrical sources. Our results showed that the concentration of glutamate in the PCC had a significant negative correlation with the tissue mean diffusivity in the same area. The analysis of resting state networks did not show any relationship between the concentration of glutamate and the intrinsic activity of the resting state networks. The concentration of glutamate showed a positive correlation with the electrical generators of alpha-1 frequency and a negative correlation with the generators of alpha-2 and beta-1 electrical generators. (c) 2017 Wiley Periodicals, Inc. [less ▲]

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See detailTumor host-interface in metastatic dissemination and adaptation to treatment
Sounni, Nor Eddine ULg

Scientific conference (2017)

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See detailThe role of parental anxiety sensitivity and learning experiences in children's anxiety sensitivity.
Stassart, Céline ULg; Dardenne, Benoît ULg; Etienne, Anne-Marie ULg

in British Journal of Developmental Psychology (2017)

This study evaluated the impact of the mother’s and father’s anxiety sensitivity (AS) andlearning experiences on children’s AS, and the influence of two moderators: the children’sfemininity orientation and ... [more ▼]

This study evaluated the impact of the mother’s and father’s anxiety sensitivity (AS) andlearning experiences on children’s AS, and the influence of two moderators: the children’sfemininity orientation and the children’s emotional intelligence (EI). The samplecomprised 200 non-clinical children, aged 9–13 years, and their parents (mothers andfathers). Results revealed that the effect of parental AS on children’s AS is moderated bythe children’s EI for maternal AS and by their femininity traits for paternal AS. Learningexperiences following somatic sensations influenced the children’s level of AS. Morespecifically, special attention by parents following a child’s somatic sensations (reinforce-ment and transmission of information) was associated with high AS in children. Parentalreactions of fear following a parent’s somatic sensations (modelling) seem to predicthigher scores for AS when the link is moderated by the child’s femininity orientation. Theimplications of these findings are discussed. [less ▲]

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See detailHow does forest cover impact water flows and ecosystem services? Insights from real-life catchments in Wallonia (Belgium)
Brogna, Delphine; Vincke, Caroline; Brostaux, Yves ULg et al

in Ecological Indicators (2017), 72

While planet boundaries are being crossed and ecosystems degraded, the Ecosystem Service (ES) conceptrepresents a potential decision-making tool for improved natural resources management. The main aimof ... [more ▼]

While planet boundaries are being crossed and ecosystems degraded, the Ecosystem Service (ES) conceptrepresents a potential decision-making tool for improved natural resources management. The main aimof this paper is to assess the impact of forest cover on water related ES in Wallonia (Belgium) in termsof quantity and timing. We developed an approach based on easily accessible data, monitored in severalcountries and using straightforward statistical methods. This led us to study ES at “real-life” catchmentsscale: 22 catchments – from 30 to 250 km2– with mixed land covers were studied. We approached thewater supply and flood protection services through 5 indicators extracted from 10 hydrological years(2005–2014) discharge data series. These were computed annually and seasonally (vegetation periodfrom March to September and “non-vegetation” period the rest of the year). The water supply wasassessed through the specific volume Vs, the baseflow index BFI and the specific discharge exceeded95% of the time Q95s whereas the flood protection service was approached through the specific dis-charge exceeded 5% of the time Q05s and the flashiness index FI. Our study gives two main insights. First,statistical analyses show that forest cover negatively impact water supply when studying annual and“non-vegetation” period flows in general (Vs) but positively when studying low flows (Q95s). Regardingflood protection a slightly negative impact of forest cover on high flows (Q05s) was highlighted in the“non-vegetation” period. Results also show a negative impact of forests annually and in the vegetationperiod on the flashy behaviour of the catchment thus a positive impact on the flood protection ES. The“year” effect is overall highly significant testifying the importance of climatic factors. Rainfall is oftensignificant and can be considered as a main driver of these ES. Secondly, analyzing the quality of themodels produced and the results overall we assume that other variables characterizing the catchmentssuch as topography or soil types do play a significant role in the delivery of these ES. This questions theuse of land cover proxies in assessing and mapping of hydrological ES at a complex landscape scale. Wethus recommend further research to keep improving land cover proxies if they are used. [less ▲]

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See detailL'énonciation vidéoludique : analyse du jeu Portal
Barnabé, Fanny ULg

in Dondero, Maria Giulia; Beyaert-Geslin, Anne; Moutat, Audrey (Eds.) Les plis du visuel. Réflexivité et énonciation dans l'image (2017)

Si la sémiotique visuelle a aujourd’hui largement exploré bon nombre de domaines, le jeu vidéo demeure un champ relativement peu étudié via cette approche. Il constitue, en ce sens, un objet à la fois ... [more ▼]

Si la sémiotique visuelle a aujourd’hui largement exploré bon nombre de domaines, le jeu vidéo demeure un champ relativement peu étudié via cette approche. Il constitue, en ce sens, un objet à la fois problématique (car l’application des concepts développés pour les autres types d’images risque parfois de mener à des impasses) et potentiellement fécond (car il permet de tester ces mêmes concepts sur un objet qui leur résiste et éventuellement d’ouvrir de nouvelles perspectives). La question de l’énonciation vidéoludique, par contre, suscite déjà l’intérêt : différents chercheurs tels que Genvo (2008), Mabillot (2001), Amato (2005), Mpondo-Dicka (2005) ou Nélide-Mouniapin (2005) ont, en effet, déjà soulevé cette problématique. Néanmoins, celle-ci est rarement abordée sous l’angle de la sémiotique visuelle. La nouveauté du sujet implique donc que l’analyse que nous proposerons ici, loin d’être un état des lieux complet et abouti, aura plutôt pour objectif d’ouvrir le champ de la réflexion et de proposer des pistes d’interrogation pour aborder ce système sémiotique complexe qu’est le jeu vidéo. Malgré tout, dans le but d’asseoir nos observations sur des bases concrètes, nous nous intéresserons à une œuvre vidéoludique particulière : le jeu de réflexion Portal, développé en 2007 par Valve Corporation. [less ▲]

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See detailGlobal disorders of consciousness.
Stender, Johan; Laureys, Steven ULg; Gosseries, Olivia ULg

in Velmans, Max; Schneider, Susan (Eds.) The Blackwell Companion to Consciousness (2017)

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See detailPotential uses of pumped urban groundwater. A case study in Sant Adrià del Besòs (Spain)
Jurado Elices, Anna ULg; vázquez-Suñé, Enric; Pujades, Estanislao ULg

in Hydrogeology Journal (2017)

Urban groundwater has been over-exploited during the past, mainly for industrial uses, and it now tends to be reduced or abandoned due to pollution and/or changes in land use. The use and the subsequent ... [more ▼]

Urban groundwater has been over-exploited during the past, mainly for industrial uses, and it now tends to be reduced or abandoned due to pollution and/or changes in land use. The use and the subsequent disuse of groundwater resulted in rising water tables that damage underground structures (e.g., building basements and underground car parks and tunnels), leading to additional pumping in urban areas. This is the case of the underground parking lot of Sant Adrià del Besòs (NE Spain), where large amounts of urban groundwater are pumped to avoid seepage problems. The question that arises here is if this pumped groundwater can be used for other purposes (e.g., drinking water and urban irrigation) instead of wasting this valuable resource. To answer this question, it is necessary to quantify the groundwater recharge and to assess the evolution of ground-water quality in order to properly identify its potential uses. The limiting factor to define the uses of this resource is the groundwater quality because ammonium and some metals (iron and manganese) are present at high concentrations. Hence, further treatment would be needed to meet drinking water requirements. The pumped groundwater could also be used for supplying the ecological river flow and/or for mitigating seawater intrusion problems. Currently, only a small amount of this urban groundwater is used for cleaning public areas and watering public gardens. This situation highlighted the urgent need to manage this resource in a responsible and more efficient manner, especially in moments of high water demand such as drought periods. [less ▲]

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See detailEcotoxicoproteomic assessment of the functional alterations caused by chronic metallic exposures in gammarids
Gismondi, Eric ULg; Thomé, Jean-Pierre ULg; Urien, Nastassia et al

in Environmental Pollution (2017)

Very few ecotoxicological studies have been performed on long-term exposure under controlled conditions, hence limiting the assessment of the impact of chronic and diffuse chemical pressures on the health ... [more ▼]

Very few ecotoxicological studies have been performed on long-term exposure under controlled conditions, hence limiting the assessment of the impact of chronic and diffuse chemical pressures on the health of aquatic organisms. In this study, an ecotoxicoproteomic approach was used to assess the integrated response and possible acclimation mechanisms in Gammarus fossarum following chronic exposures to Cd, Cu or Pb, at environmentally realistic concentrations (i.e. 0.25, 1.5 and 5 µg/L respectively). After 10-week exposure, changes in protein expression were investigated in caeca of control and exposed males. Gel-free proteomic analyses allowed for the identification of 35 proteins involved in various biological functions, for which 23 were significantly deregulated by metal exposures. The protein deregulation profiles were specific to each metal, providing evidence for metal-specific action sites and responses of gammarids. Among the tested metals, Cu was the most toxic in terms of mortality, probably linked with persistent oxidative stress. Moulting and osmoregulation were the major biological functions affected by Cu in the long-term. In Pb-exposed gammarids, significant deregulations of proteins involved in immune response and cytoskeleton were observed. Reproduction appears to be strongly affected in gammarids chronically exposed to Cd or Pb. Besides, modified expressions of several proteins involved in energy transfer and metabolism highlighted important energetic reshuffling to cope with chronic metal exposures. These results support the fact that metallic pressures induce a functional and energetic cost for individuals of G. fossarum with potential repercussions on population dynamics. Furthermore, this ecotoxicoproteomic study offers promising lines of enquiry in the development of new biomarkers that could make evidence of long-term impacts of metals on the health of organisms. [less ▲]

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See detailMono- and bimetallic manganese-carbonyl complexes and clusters bearing imidazol(in)ium-2-dithiocarboxylate ligands
Beltran Alvarez, Tomás Francisco ULg; Zaragoza, Guillermo; Delaude, Lionel ULg

in Dalton Transactions (2017), 46

Five complexes with the generic formula fac-[MnBr(CO)3(S2C[middle dot]NHC)] were obtained by reacting [MnBr(CO)5] with a set of representative imidazol(in)ium-2-dithiocarboxylate zwitterions. These ... [more ▼]

Five complexes with the generic formula fac-[MnBr(CO)3(S2C[middle dot]NHC)] were obtained by reacting [MnBr(CO)5] with a set of representative imidazol(in)ium-2-dithiocarboxylate zwitterions. These ligands are the adducts of N-heterocyclic carbenes (NHCs) and carbon disulfide. The mononuclear Mn(i) derivatives were coupled with Na[Mn(CO)5] to afford bimetallic [Mn2(CO)6(S2C[middle dot]NHC)] clusters. Yet, the most convenient strategy to access these dinuclear Mn(0) products implied a direct carbonyl substitution from the [Mn2(CO)10] dimer. The molecular structures of three monometallic and four bimetallic compounds were elucidated by single crystal X-ray diffraction analysis. In the monometallic complexes, the NHC[middle dot]CS2 ligands exhibited a bidentate [small kappa]2-S,S[prime or minute] coordination mode with an S-C-S bite angle of about 116[degree]. In the dinuclear clusters, the CS2- unit acted as a chelate toward one manganese center and as a pseudoallylic ligand toward the other one. The S-C-S bite angle was reduced to ca. 104[degree]. Thus, the zwitterions displayed a remarkable flexibility, which also permitted a staggered arrangement of the carbonyl groups in the bimetallic systems. Examination of the [small nu, Greek, macron]CO absorption bands on IR spectroscopy helped identify the presence of fac-Mn(CO)3 or Mn2(CO)6 motifs, while the 13C NMR chemical shift of the CS2- moiety was a reliable indicator for monitoring its hapticity. Whereas the dinuclear clusters were air- and moisture-stable crystalline solids, mononuclear halido derivatives displayed only a limited stability under aerobic conditions. Both types of compounds underwent rather unselective, extensive fragmentations in the gas phase, in sharp contrast with the analogous rhenium derivatives that led to clean sequential decarbonylation processes upon collision-induced dissociation. [less ▲]

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See detailExploring sex differences in the adult zebra finch brain: in vivo diffusion tensor imaging and ex vivo super-resolution track density imaging
Hamaide, J.; De Groof, G.; Van Steenkiste, G. et al

in NeuroImage (2017)

Zebra finches are an excellent model to study the process of vocal learning, a complex socially-learned tool of communication that forms the basis of spoken human language. So far, structural ... [more ▼]

Zebra finches are an excellent model to study the process of vocal learning, a complex socially-learned tool of communication that forms the basis of spoken human language. So far, structural investigation of the zebra finch brain has been performed ex vivo using invasive methods such as histology. These methods are highly specific, however, they strongly interfere with performing whole-brain analyses and exclude longitudinal studies aimed at establishing causal correlations between neuroplastic events and specific behavioral performances. Therefore, the aim of the current study was to implement an in vivo Diffusion Tensor Imaging (DTI) protocol sensitive enough to detect structural sex differences in the adult zebra finch brain. Voxel-wise comparison of male and female DTI parameter maps shows clear differences in several components of the song control system (i.e. Area X surroundings, the high vocal center (HVC) and the lateral magnocellular nucleus of the anterior nidopallium (LMAN)), which corroborate previous findings and are in line with the clear behavioral difference as only males sing. Furthermore, to obtain additional insights into the 3-dimensional organization of the zebra finch brain and clarify findings obtained by the in vivo study, ex vivo DTI data of the male and female brain were acquired as well, using a recently established super-resolution reconstruction (SRR) imaging strategy. Interestingly, the SRR-DTI approach led to a marked reduction in acquisition time without interfering with the (spatial and angular) resolution and SNR which enabled to acquire a data set characterized by a 78μm isotropic resolution including 90 diffusion gradient directions within 44h of scanning time. Based on the reconstructed SRR-DTI maps, whole brain probabilistic Track Density Imaging (TDI) was performed for the purpose of super resolved track density imaging, further pushing the resolution up to 40μm isotropic. The DTI and TDI maps realized atlas-quality anatomical maps that enable a clear delineation of most components of the song control and auditory systems. In conclusion, this study paves the way for longitudinal in vivo and high-resolution ex vivo experiments aimed at disentangling [less ▲]

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See detailFrom distant neighbours to bedmates: Exploring the synergies between the social economy and sustainable development
Hudon, Marek; Huybrechts, Benjamin ULg

in Annals of Public and Cooperative Economics (2017), 88(2),

To introduce this special issue we explore the conceptual and practical synergies between the social economy and sustainable development. New empirical evidence is presented on the emergence of these two ... [more ▼]

To introduce this special issue we explore the conceptual and practical synergies between the social economy and sustainable development. New empirical evidence is presented on the emergence of these two research fields and the increasing combination of these fields in the literature. Several avenues through which social enterprises can contribute to the transition towards sustainable development are then identified. This is followed by a discussion of how and why the combination can be particularly fruitful both for the social economy and for sustainability transition movements. We also highlight some important challenges facing the social economy with regard to its contribution to sustainable development. Finally we introduce the papers that constitute this special issue and show how they contribute, individually and collectively, to a better understanding of the increasing linkage between the social economy and sustainable development. [less ▲]

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See detailAssessment of the entering stock, migration dynamics and fish pass fidelity of european eel in the belgian meuse river
Nzau Matondo, Billy ULg; Benitez, Jean-Philippe ULg; Dierckx, Arnaud ULg et al

in River Research & Applications (2017), 33

Migration dynamics of incoming eels in Belgium via Lixhe in the Meuse River were investigated using two fish passes with different configurations— net traps and automatic detection stations—as tools to ... [more ▼]

Migration dynamics of incoming eels in Belgium via Lixhe in the Meuse River were investigated using two fish passes with different configurations— net traps and automatic detection stations—as tools to distinguish resident and migrating eels. From April to September 2013, 435 eels (P50 length, 403 mm; range, 196–836 mm) were caught (daily maxima catch, 90 eels per day), 90% between 13 June and 1 August (50 days) and P50 on 19 July. Eels migrated mostly at 19–26 °C (P50, 24.4 °C), river discharge 65–314m3 s 1 (P50, 84m3 s 1), during the dark at 00:00–05:00 h and during both the waxing and waning phases of moonlight. From 396 eels tagged and released 0.3 km downstream of the Lixhe dam, 6.8% of them were recaptured, and 37.4% were detected. Migration flux was estimated at 7184 eels (0.863 t) using the markrecapture method and decreased to 1156 eels (0.139 t) using automatic transponder detection. Most eels probably migrated through a sluice located downstream of Lixhe to reach the upper Meuse via the Albert Canal. Eels moved almost independently to the configuration of the fish passes and their location, but most eels displayed fidelity to the fish pass where they were captured. Migrant eels showed a wide range of size and life stages, with a higher proportion of eels (80%) belonging to the yellow eel stage. A lower proportion of eels (6%) had a larger size and presented an advanced continental silvering process corresponding to the migrating stage before their transatlantic migration. Copyright © 2016 John Wiley & Sons, Ltd. [less ▲]

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See detailExtracting oscillating components from nonstationary time series: A wavelet-induced method
Deliège, Adrien ULg

E-print/Working paper (2017)

This paper consists in the description and application of a new method named Wavelet-Induced Mode Extraction (WIME) in the context of time-frequency analysis. WIME aims to extract the oscillating ... [more ▼]

This paper consists in the description and application of a new method named Wavelet-Induced Mode Extraction (WIME) in the context of time-frequency analysis. WIME aims to extract the oscillating components that build amplitude modulated-frequency modulated signals. The essence of this technique relies on the successive extractions of the dominant ridges of wavelet-based timefrequency representations of the signal under consideration. Our tests on simulated examples indicate strong decomposition and reconstruction skills, trouble-free handling of crossing trajectories in the time-frequency plane, sharp performances in frequency detection in the case of mode-mixing problems and a natural tolerance to noise. These results are compared with those obtained with the Empirical Mode Decomposition. We also show that WIME still gives meaningful results with real-life data, namely the Oceanic Niño Index. [less ▲]

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See detailMeta-Analysis of Genome-Wide Association Studies for Abdominal Aortic Aneurysm Identifies Four New Disease-Specific Risk Loci
Jones, Gregory; Tromp, Gerard; Kuivaniemi, Helena et al

in Circulation Research (2017)

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See detailA novel SMAD3 mutation caused multiple aneurysms in a patient without osteoarthritis symptoms
Courtois, Audrey ULg; Coppieters, Wouter ULg; BOURS, Vincent ULg et al

in European Journal of Medical Genetics (2017)

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See detailDéficits de la conscience autonoétique et de la mémoire autobiographique: résultats d'une intervention cognitive dans la schizophrénie.
Boulanger, Marie ULg; Neumann, Aurore; Blairy, Sylvie ULg

in Pratiques Psychologiques (2017)

The study evaluates the effects of a cognitive intervention called Self-Awareness Therapy (SAT) on abilities of mental time travel in deficit in schizophrenia. Among whole schizophrenia participants ... [more ▼]

The study evaluates the effects of a cognitive intervention called Self-Awareness Therapy (SAT) on abilities of mental time travel in deficit in schizophrenia. Among whole schizophrenia participants, seven participated in SAT, four took part in the Integrative Program Therapy (IPT) and six followed a treatment as usual. Before and after interventions, participants were asked to complete TEMPau for autonoetic awareness and autobiographical memory such as TeMA, for autobiographical memory and projection into future events. Intragroups and individual statistical analyses were conducted. The participants of SAT intervention reported more specific past TEMPau and future specific events on TeMA after therapy. Results support that, in schizophrenia, the retrieving of past specific memories and projection into future specific events could be improved under certain conditions only. [less ▲]

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See detailNew computational method of the ball/race contacts transverse loads of high speed ball bearings without race control hypothesis
Servais, Christophe ULg

in Tribology International (2017)

Some hypotheses are still necessary in order to access the ball bearing Newtonian equilibrium with quasi-static methods. Among these hypotheses are the values of the transverse loads within ball/race ... [more ▼]

Some hypotheses are still necessary in order to access the ball bearing Newtonian equilibrium with quasi-static methods. Among these hypotheses are the values of the transverse loads within ball/race contacts. Those loads are due to the gyroscopic torques. Nowadays, the transverse loads are estimated without any equilibrium criterion by the specialized literature. Moreover, the race control assumption is often employed in addition to the hypotheses made about the transverse loads. The paper describes a new method to compute the transverse loads without using the race control assumption. Then, a correlation between the ball bearing kinematics and the transverse loads is established. It leads to an accurate and efficient computational method to access the Newtonian equilibrium of high speed ball bearings. [less ▲]

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See detailL'affaire Jean-Claude Romand. Entre vérité et mensonge, réalité et fiction
Thirion, Nicolas ULg; Pasteger, David ULg; Flores-Lonjou, Magalie

in Miniato, Lionel; Jouve, Emeline (Eds.) Chronique judiciaire et fictionnalisation du procès. Discours, récits et représentations (2017)

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See detailMRI follow-up is unnecessary in patients with macroprolactinomas and long-term normal prolactin levels on dopamine agonist treatment.
Eroukhmanoff, J.; Tejedor, I.; Potorac, Iulia ULg et al

in European Journal of Endocrinology (2017), 176(3), 323-328

OBJECTIVE: Both antitumor and antisecretory efficacies of dopamine agonists (DA) make them the first-line treatment of macroprolactinomas. However, there is no guideline for MRI follow-up once prolactin ... [more ▼]

OBJECTIVE: Both antitumor and antisecretory efficacies of dopamine agonists (DA) make them the first-line treatment of macroprolactinomas. However, there is no guideline for MRI follow-up once prolactin is controlled. The aim of our study was to determine whether a regular MRI follow-up was necessary in patients with long-term normal prolactin levels under DA. PATIENTS AND METHODS: We conducted a retrospective multicenter study (Marseille, Paris La Pitie Salpetriere and Nancy, France; Liege, Belgium) including patients with macroprolactinomas (largest diameter: >10 mm and baseline prolactin level: >100 ng/mL) treated by dopamine agonists, and regularly followed (pituitary MRI and prolactin levels) during at least 48 months once normal prolactin level was obtained. RESULTS: In total, 115 patients were included (63 men and 52 women; mean age at diagnosis: 36.3 years). Mean baseline prolactin level was 2224 +/- 6839 ng/mL. No significant increase of tumor volume was observed during the follow-up. Of the 21 patients (18%) who presented asymptomatic hemorrhagic changes of the macroprolactinoma on MRI, 2 had a tumor increase (2 and 7 mm in the largest size). Both were treated by cabergoline (1 mg/week) with normal prolactin levels obtained for 6 and 24 months. For both patients, no further growth was observed on MRI during follow-up at the same dose of cabergoline. CONCLUSION: No significant increase of tumor size was observed in our patients with controlled prolactin levels on DA. MRI follow-up thus appears unnecessary in patients with biologically controlled macroprolactinomas. [less ▲]

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See detailL’indemnité de procédure, l’appel de la partie civile et l’acquittement du prévenu : la croix et la bannière ?
Michiels, Olivier ULg; Falque, Géraldine ULg

in Revue de Droit Pénal et de Criminologie (2017), 2017/1

En ce qu’il ne permet pas au juge répressif d’accorder au prévenu acquitté et au civilement responsable une indemnité de procédure d’appel à charge de la partie civile succombante qui, en l’absence de ... [more ▼]

En ce qu’il ne permet pas au juge répressif d’accorder au prévenu acquitté et au civilement responsable une indemnité de procédure d’appel à charge de la partie civile succombante qui, en l’absence de tout recours du ministère public, a interjeté appel d’un jugement d’acquittement statuant sur une action intentée par le ministère public, l’article 162bis, alinéa 2, du Code d’instruction criminelle viole les articles 10 et 11 de la Constitution. [less ▲]

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